fsl,has-rstcr;
};
+
+ h) 4xx/Axon EMAC ethernet nodes
+
+ The EMAC ethernet controller in IBM and AMCC 4xx chips, and also
+ the Axon bridge. To operate this needs to interact with a ths
+ special McMAL DMA controller, and sometimes an RGMII or ZMII
+ interface. In addition to the nodes and properties described
+ below, the node for the OPB bus on which the EMAC sits must have a
+ correct clock-frequency property.
+
+ i) The EMAC node itself
+
+ Required properties:
+ - device_type : "network"
+
+ - compatible : compatible list, contains 2 entries, first is
+ "ibm,emac-CHIP" where CHIP is the host ASIC (440gx,
+ 405gp, Axon) and second is either "ibm,emac" or
+ "ibm,emac4". For Axon, thus, we have: "ibm,emac-axon",
+ "ibm,emac4"
+ - interrupts : <interrupt mapping for EMAC IRQ and WOL IRQ>
+ - interrupt-parent : optional, if needed for interrupt mapping
+ - reg : <registers mapping>
+ - local-mac-address : 6 bytes, MAC address
+ - mal-device : phandle of the associated McMAL node
+ - mal-tx-channel : 1 cell, index of the tx channel on McMAL associated
+ with this EMAC
+ - mal-rx-channel : 1 cell, index of the rx channel on McMAL associated
+ with this EMAC
+ - cell-index : 1 cell, hardware index of the EMAC cell on a given
+ ASIC (typically 0x0 and 0x1 for EMAC0 and EMAC1 on
+ each Axon chip)
+ - max-frame-size : 1 cell, maximum frame size supported in bytes
+ - rx-fifo-size : 1 cell, Rx fifo size in bytes for 10 and 100 Mb/sec
+ operations.
+ For Axon, 2048
+ - tx-fifo-size : 1 cell, Tx fifo size in bytes for 10 and 100 Mb/sec
+ operations.
+ For Axon, 2048.
+ - fifo-entry-size : 1 cell, size of a fifo entry (used to calculate
+ thresholds).
+ For Axon, 0x00000010
+ - mal-burst-size : 1 cell, MAL burst size (used to calculate thresholds)
+ in bytes.
+ For Axon, 0x00000100 (I think ...)
+ - phy-mode : string, mode of operations of the PHY interface.
+ Supported values are: "mii", "rmii", "smii", "rgmii",
+ "tbi", "gmii", rtbi", "sgmii".
+ For Axon on CAB, it is "rgmii"
+ - mdio-device : 1 cell, required iff using shared MDIO registers
+ (440EP). phandle of the EMAC to use to drive the
+ MDIO lines for the PHY used by this EMAC.
+ - zmii-device : 1 cell, required iff connected to a ZMII. phandle of
+ the ZMII device node
+ - zmii-channel : 1 cell, required iff connected to a ZMII. Which ZMII
+ channel or 0xffffffff if ZMII is only used for MDIO.
+ - rgmii-device : 1 cell, required iff connected to an RGMII. phandle
+ of the RGMII device node.
+ For Axon: phandle of plb5/plb4/opb/rgmii
+ - rgmii-channel : 1 cell, required iff connected to an RGMII. Which
+ RGMII channel is used by this EMAC.
+ Fox Axon: present, whatever value is appropriate for each
+ EMAC, that is the content of the current (bogus) "phy-port"
+ property.
+
+ Recommended properties:
+ - linux,network-index : This is the intended "index" of this
+ network device. This is used by the bootwrapper to interpret
+ MAC addresses passed by the firmware when no information other
+ than indices is available to associate an address with a device.
+
+ Optional properties:
+ - phy-address : 1 cell, optional, MDIO address of the PHY. If absent,
+ a search is performed.
+ - phy-map : 1 cell, optional, bitmap of addresses to probe the PHY
+ for, used if phy-address is absent. bit 0x00000001 is
+ MDIO address 0.
+ For Axon it can be absent, thouugh my current driver
+ doesn't handle phy-address yet so for now, keep
+ 0x00ffffff in it.
+ - rx-fifo-size-gige : 1 cell, Rx fifo size in bytes for 1000 Mb/sec
+ operations (if absent the value is the same as
+ rx-fifo-size). For Axon, either absent or 2048.
+ - tx-fifo-size-gige : 1 cell, Tx fifo size in bytes for 1000 Mb/sec
+ operations (if absent the value is the same as
+ tx-fifo-size). For Axon, either absent or 2048.
+ - tah-device : 1 cell, optional. If connected to a TAH engine for
+ offload, phandle of the TAH device node.
+ - tah-channel : 1 cell, optional. If appropriate, channel used on the
+ TAH engine.
+
+ Example:
+
+ EMAC0: ethernet@40000800 {
+ linux,network-index = <0>;
+ device_type = "network";
+ compatible = "ibm,emac-440gp", "ibm,emac";
+ interrupt-parent = <&UIC1>;
+ interrupts = <1c 4 1d 4>;
+ reg = <40000800 70>;
+ local-mac-address = [00 04 AC E3 1B 1E];
+ mal-device = <&MAL0>;
+ mal-tx-channel = <0 1>;
+ mal-rx-channel = <0>;
+ cell-index = <0>;
+ max-frame-size = <5dc>;
+ rx-fifo-size = <1000>;
+ tx-fifo-size = <800>;
+ phy-mode = "rmii";
+ phy-map = <00000001>;
+ zmii-device = <&ZMII0>;
+ zmii-channel = <0>;
+ };
+
+ ii) McMAL node
+
+ Required properties:
+ - device_type : "dma-controller"
+ - compatible : compatible list, containing 2 entries, first is
+ "ibm,mcmal-CHIP" where CHIP is the host ASIC (like
+ emac) and the second is either "ibm,mcmal" or
+ "ibm,mcmal2".
+ For Axon, "ibm,mcmal-axon","ibm,mcmal2"
+ - interrupts : <interrupt mapping for the MAL interrupts sources:
+ 5 sources: tx_eob, rx_eob, serr, txde, rxde>.
+ For Axon: This is _different_ from the current
+ firmware. We use the "delayed" interrupts for txeob
+ and rxeob. Thus we end up with mapping those 5 MPIC
+ interrupts, all level positive sensitive: 10, 11, 32,
+ 33, 34 (in decimal)
+ - dcr-reg : < DCR registers range >
+ - dcr-parent : if needed for dcr-reg
+ - num-tx-chans : 1 cell, number of Tx channels
+ - num-rx-chans : 1 cell, number of Rx channels
+
+ iii) ZMII node
+
+ Required properties:
+ - compatible : compatible list, containing 2 entries, first is
+ "ibm,zmii-CHIP" where CHIP is the host ASIC (like
+ EMAC) and the second is "ibm,zmii".
+ For Axon, there is no ZMII node.
+ - reg : <registers mapping>
+
+ iv) RGMII node
+
+ Required properties:
+ - compatible : compatible list, containing 2 entries, first is
+ "ibm,rgmii-CHIP" where CHIP is the host ASIC (like
+ EMAC) and the second is "ibm,rgmii".
+ For Axon, "ibm,rgmii-axon","ibm,rgmii"
+ - reg : <registers mapping>
+ - revision : as provided by the RGMII new version register if
+ available.
+ For Axon: 0x0000012a
+
More devices will be defined as this spec matures.
VII - Specifying interrupt information for devices
config 440GP
bool
-# Disabled until the new EMAC Driver is merged.
-# select IBM_NEW_EMAC_ZMII
+ select IBM_NEW_EMAC_ZMII
config 440GX
bool
select PPC_INDIRECT_IO
select PPC_NATIVE
select MPIC
+ select IBM_NEW_EMAC_EMAC4
+ select IBM_NEW_EMAC_RGMII
+ select IBM_NEW_EMAC_ZMII #test only
+ select IBM_NEW_EMAC_TAH #test only
default n
config PPC_IBM_CELL_BLADE
<file:Documentation/networking/net-modules.txt>. The module will
be called ibmveth.
-config IBM_EMAC
- tristate "PowerPC 4xx on-chip Ethernet support"
- depends on 4xx && !PPC_MERGE
- help
- This driver supports the PowerPC 4xx EMAC family of on-chip
- Ethernet controllers.
-
-config IBM_EMAC_RXB
- int "Number of receive buffers"
- depends on IBM_EMAC
- default "128"
-
-config IBM_EMAC_TXB
- int "Number of transmit buffers"
- depends on IBM_EMAC
- default "64"
-
-config IBM_EMAC_POLL_WEIGHT
- int "MAL NAPI polling weight"
- depends on IBM_EMAC
- default "32"
-
-config IBM_EMAC_RX_COPY_THRESHOLD
- int "RX skb copy threshold (bytes)"
- depends on IBM_EMAC
- default "256"
-
-config IBM_EMAC_RX_SKB_HEADROOM
- int "Additional RX skb headroom (bytes)"
- depends on IBM_EMAC
- default "0"
- help
- Additional receive skb headroom. Note, that driver
- will always reserve at least 2 bytes to make IP header
- aligned, so usually there is no need to add any additional
- headroom.
-
- If unsure, set to 0.
-
-config IBM_EMAC_PHY_RX_CLK_FIX
- bool "PHY Rx clock workaround"
- depends on IBM_EMAC && (405EP || 440GX || 440EP || 440GR)
- help
- Enable this if EMAC attached to a PHY which doesn't generate
- RX clock if there is no link, if this is the case, you will
- see "TX disable timeout" or "RX disable timeout" in the system
- log.
-
- If unsure, say N.
-
-config IBM_EMAC_DEBUG
- bool "Debugging"
- depends on IBM_EMAC
- default n
-
-config IBM_EMAC_ZMII
- bool
- depends on IBM_EMAC && (NP405H || NP405L || 44x)
- default y
-
-config IBM_EMAC_RGMII
- bool
- depends on IBM_EMAC && 440GX
- default y
-
-config IBM_EMAC_TAH
- bool
- depends on IBM_EMAC && 440GX
- default y
+source "drivers/net/ibm_emac/Kconfig"
+source "drivers/net/ibm_newemac/Kconfig"
config NET_PCI
bool "EISA, VLB, PCI and on board controllers"
obj-$(CONFIG_E1000) += e1000/
obj-$(CONFIG_E1000E) += e1000e/
obj-$(CONFIG_IBM_EMAC) += ibm_emac/
+obj-$(CONFIG_IBM_NEW_EMAC) += ibm_newemac/
obj-$(CONFIG_IXGBE) += ixgbe/
obj-$(CONFIG_IXGB) += ixgb/
obj-$(CONFIG_IP1000) += ipg.o
--- /dev/null
+config IBM_EMAC
+ tristate "PowerPC 4xx on-chip Ethernet support"
+ depends on 4xx && !PPC_MERGE
+ help
+ This driver supports the PowerPC 4xx EMAC family of on-chip
+ Ethernet controllers.
+
+config IBM_EMAC_RXB
+ int "Number of receive buffers"
+ depends on IBM_EMAC
+ default "128"
+
+config IBM_EMAC_TXB
+ int "Number of transmit buffers"
+ depends on IBM_EMAC
+ default "64"
+
+config IBM_EMAC_POLL_WEIGHT
+ int "MAL NAPI polling weight"
+ depends on IBM_EMAC
+ default "32"
+
+config IBM_EMAC_RX_COPY_THRESHOLD
+ int "RX skb copy threshold (bytes)"
+ depends on IBM_EMAC
+ default "256"
+
+config IBM_EMAC_RX_SKB_HEADROOM
+ int "Additional RX skb headroom (bytes)"
+ depends on IBM_EMAC
+ default "0"
+ help
+ Additional receive skb headroom. Note, that driver
+ will always reserve at least 2 bytes to make IP header
+ aligned, so usually there is no need to add any additional
+ headroom.
+
+ If unsure, set to 0.
+
+config IBM_EMAC_PHY_RX_CLK_FIX
+ bool "PHY Rx clock workaround"
+ depends on IBM_EMAC && (405EP || 440GX || 440EP || 440GR)
+ help
+ Enable this if EMAC attached to a PHY which doesn't generate
+ RX clock if there is no link, if this is the case, you will
+ see "TX disable timeout" or "RX disable timeout" in the system
+ log.
+
+ If unsure, say N.
+
+config IBM_EMAC_DEBUG
+ bool "Debugging"
+ depends on IBM_EMAC
+ default n
+
+config IBM_EMAC_ZMII
+ bool
+ depends on IBM_EMAC && (NP405H || NP405L || 44x)
+ default y
+
+config IBM_EMAC_RGMII
+ bool
+ depends on IBM_EMAC && 440GX
+ default y
+
+config IBM_EMAC_TAH
+ bool
+ depends on IBM_EMAC && 440GX
+ default y
+
--- /dev/null
+config IBM_NEW_EMAC
+ tristate "IBM EMAC Ethernet support"
+ depends on PPC_DCR && PPC_MERGE
+ help
+ This driver supports the IBM EMAC family of Ethernet controllers
+ typically found on 4xx embedded PowerPC chips, but also on the
+ Axon southbridge for Cell.
+
+config IBM_NEW_EMAC_RXB
+ int "Number of receive buffers"
+ depends on IBM_NEW_EMAC
+ default "128"
+
+config IBM_NEW_EMAC_TXB
+ int "Number of transmit buffers"
+ depends on IBM_NEW_EMAC
+ default "64"
+
+config IBM_NEW_EMAC_POLL_WEIGHT
+ int "MAL NAPI polling weight"
+ depends on IBM_NEW_EMAC
+ default "32"
+
+config IBM_NEW_EMAC_RX_COPY_THRESHOLD
+ int "RX skb copy threshold (bytes)"
+ depends on IBM_NEW_EMAC
+ default "256"
+
+config IBM_NEW_EMAC_RX_SKB_HEADROOM
+ int "Additional RX skb headroom (bytes)"
+ depends on IBM_NEW_EMAC
+ default "0"
+ help
+ Additional receive skb headroom. Note, that driver
+ will always reserve at least 2 bytes to make IP header
+ aligned, so usually there is no need to add any additional
+ headroom.
+
+ If unsure, set to 0.
+
+config IBM_NEW_EMAC_DEBUG
+ bool "Debugging"
+ depends on IBM_NEW_EMAC
+ default n
+
+# The options below has to be select'ed by the respective
+# processor types or platforms
+
+config IBM_NEW_EMAC_ZMII
+ bool
+ default n
+
+config IBM_NEW_EMAC_RGMII
+ bool
+ default n
+
+config IBM_NEW_EMAC_TAH
+ bool
+ default n
+
+config IBM_NEW_EMAC_EMAC4
+ bool
+ default n
--- /dev/null
+#
+# Makefile for the PowerPC 4xx on-chip ethernet driver
+#
+
+obj-$(CONFIG_IBM_NEW_EMAC) += ibm_newemac.o
+
+ibm_newemac-y := mal.o core.o phy.o
+ibm_newemac-$(CONFIG_IBM_NEW_EMAC_ZMII) += zmii.o
+ibm_newemac-$(CONFIG_IBM_NEW_EMAC_RGMII) += rgmii.o
+ibm_newemac-$(CONFIG_IBM_NEW_EMAC_TAH) += tah.o
+ibm_newemac-$(CONFIG_IBM_NEW_EMAC_DEBUG) += debug.o
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/core.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Matt Porter <mporter@kernel.crashing.org>
+ * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * Armin Kuster <akuster@mvista.com>
+ * Johnnie Peters <jpeters@mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/crc32.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/bitops.h>
+#include <linux/workqueue.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+
+#include "core.h"
+
+/*
+ * Lack of dma_unmap_???? calls is intentional.
+ *
+ * API-correct usage requires additional support state information to be
+ * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
+ * EMAC design (e.g. TX buffer passed from network stack can be split into
+ * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
+ * maintaining such information will add additional overhead.
+ * Current DMA API implementation for 4xx processors only ensures cache coherency
+ * and dma_unmap_???? routines are empty and are likely to stay this way.
+ * I decided to omit dma_unmap_??? calls because I don't want to add additional
+ * complexity just for the sake of following some abstract API, when it doesn't
+ * add any real benefit to the driver. I understand that this decision maybe
+ * controversial, but I really tried to make code API-correct and efficient
+ * at the same time and didn't come up with code I liked :(. --ebs
+ */
+
+#define DRV_NAME "emac"
+#define DRV_VERSION "3.54"
+#define DRV_DESC "PPC 4xx OCP EMAC driver"
+
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_AUTHOR
+ ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
+MODULE_LICENSE("GPL");
+
+/*
+ * PPC64 doesn't (yet) have a cacheable_memcpy
+ */
+#ifdef CONFIG_PPC64
+#define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
+#endif
+
+/* minimum number of free TX descriptors required to wake up TX process */
+#define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
+
+/* If packet size is less than this number, we allocate small skb and copy packet
+ * contents into it instead of just sending original big skb up
+ */
+#define EMAC_RX_COPY_THRESH CONFIG_IBM_NEW_EMAC_RX_COPY_THRESHOLD
+
+/* Since multiple EMACs share MDIO lines in various ways, we need
+ * to avoid re-using the same PHY ID in cases where the arch didn't
+ * setup precise phy_map entries
+ *
+ * XXX This is something that needs to be reworked as we can have multiple
+ * EMAC "sets" (multiple ASICs containing several EMACs) though we can
+ * probably require in that case to have explicit PHY IDs in the device-tree
+ */
+static u32 busy_phy_map;
+static DEFINE_MUTEX(emac_phy_map_lock);
+
+/* This is the wait queue used to wait on any event related to probe, that
+ * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
+ */
+static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
+
+/* Having stable interface names is a doomed idea. However, it would be nice
+ * if we didn't have completely random interface names at boot too :-) It's
+ * just a matter of making everybody's life easier. Since we are doing
+ * threaded probing, it's a bit harder though. The base idea here is that
+ * we make up a list of all emacs in the device-tree before we register the
+ * driver. Every emac will then wait for the previous one in the list to
+ * initialize before itself. We should also keep that list ordered by
+ * cell_index.
+ * That list is only 4 entries long, meaning that additional EMACs don't
+ * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
+ */
+
+#define EMAC_BOOT_LIST_SIZE 4
+static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
+
+/* How long should I wait for dependent devices ? */
+#define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
+
+/* I don't want to litter system log with timeout errors
+ * when we have brain-damaged PHY.
+ */
+static inline void emac_report_timeout_error(struct emac_instance *dev,
+ const char *error)
+{
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: %s\n", dev->ndev->name, error);
+}
+
+/* PHY polling intervals */
+#define PHY_POLL_LINK_ON HZ
+#define PHY_POLL_LINK_OFF (HZ / 5)
+
+/* Graceful stop timeouts in us.
+ * We should allow up to 1 frame time (full-duplex, ignoring collisions)
+ */
+#define STOP_TIMEOUT_10 1230
+#define STOP_TIMEOUT_100 124
+#define STOP_TIMEOUT_1000 13
+#define STOP_TIMEOUT_1000_JUMBO 73
+
+/* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
+static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
+ "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
+ "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
+ "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
+ "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
+ "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
+ "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
+ "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
+ "rx_bad_packet", "rx_runt_packet", "rx_short_event",
+ "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
+ "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
+ "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
+ "tx_bd_excessive_collisions", "tx_bd_late_collision",
+ "tx_bd_multple_collisions", "tx_bd_single_collision",
+ "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
+ "tx_errors"
+};
+
+static irqreturn_t emac_irq(int irq, void *dev_instance);
+static void emac_clean_tx_ring(struct emac_instance *dev);
+static void __emac_set_multicast_list(struct emac_instance *dev);
+
+static inline int emac_phy_supports_gige(int phy_mode)
+{
+ return phy_mode == PHY_MODE_GMII ||
+ phy_mode == PHY_MODE_RGMII ||
+ phy_mode == PHY_MODE_TBI ||
+ phy_mode == PHY_MODE_RTBI;
+}
+
+static inline int emac_phy_gpcs(int phy_mode)
+{
+ return phy_mode == PHY_MODE_TBI ||
+ phy_mode == PHY_MODE_RTBI;
+}
+
+static inline void emac_tx_enable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "tx_enable" NL);
+
+ r = in_be32(&p->mr0);
+ if (!(r & EMAC_MR0_TXE))
+ out_be32(&p->mr0, r | EMAC_MR0_TXE);
+}
+
+static void emac_tx_disable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "tx_disable" NL);
+
+ r = in_be32(&p->mr0);
+ if (r & EMAC_MR0_TXE) {
+ int n = dev->stop_timeout;
+ out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
+ while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
+ udelay(1);
+ --n;
+ }
+ if (unlikely(!n))
+ emac_report_timeout_error(dev, "TX disable timeout");
+ }
+}
+
+static void emac_rx_enable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
+ goto out;
+
+ DBG(dev, "rx_enable" NL);
+
+ r = in_be32(&p->mr0);
+ if (!(r & EMAC_MR0_RXE)) {
+ if (unlikely(!(r & EMAC_MR0_RXI))) {
+ /* Wait if previous async disable is still in progress */
+ int n = dev->stop_timeout;
+ while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
+ udelay(1);
+ --n;
+ }
+ if (unlikely(!n))
+ emac_report_timeout_error(dev,
+ "RX disable timeout");
+ }
+ out_be32(&p->mr0, r | EMAC_MR0_RXE);
+ }
+ out:
+ ;
+}
+
+static void emac_rx_disable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "rx_disable" NL);
+
+ r = in_be32(&p->mr0);
+ if (r & EMAC_MR0_RXE) {
+ int n = dev->stop_timeout;
+ out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
+ while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
+ udelay(1);
+ --n;
+ }
+ if (unlikely(!n))
+ emac_report_timeout_error(dev, "RX disable timeout");
+ }
+}
+
+static inline void emac_netif_stop(struct emac_instance *dev)
+{
+ netif_tx_lock_bh(dev->ndev);
+ dev->no_mcast = 1;
+ netif_tx_unlock_bh(dev->ndev);
+ dev->ndev->trans_start = jiffies; /* prevent tx timeout */
+ mal_poll_disable(dev->mal, &dev->commac);
+ netif_tx_disable(dev->ndev);
+}
+
+static inline void emac_netif_start(struct emac_instance *dev)
+{
+ netif_tx_lock_bh(dev->ndev);
+ dev->no_mcast = 0;
+ if (dev->mcast_pending && netif_running(dev->ndev))
+ __emac_set_multicast_list(dev);
+ netif_tx_unlock_bh(dev->ndev);
+
+ netif_wake_queue(dev->ndev);
+
+ /* NOTE: unconditional netif_wake_queue is only appropriate
+ * so long as all callers are assured to have free tx slots
+ * (taken from tg3... though the case where that is wrong is
+ * not terribly harmful)
+ */
+ mal_poll_enable(dev->mal, &dev->commac);
+}
+
+static inline void emac_rx_disable_async(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "rx_disable_async" NL);
+
+ r = in_be32(&p->mr0);
+ if (r & EMAC_MR0_RXE)
+ out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
+}
+
+static int emac_reset(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ int n = 20;
+
+ DBG(dev, "reset" NL);
+
+ if (!dev->reset_failed) {
+ /* 40x erratum suggests stopping RX channel before reset,
+ * we stop TX as well
+ */
+ emac_rx_disable(dev);
+ emac_tx_disable(dev);
+ }
+
+ out_be32(&p->mr0, EMAC_MR0_SRST);
+ while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
+ --n;
+
+ if (n) {
+ dev->reset_failed = 0;
+ return 0;
+ } else {
+ emac_report_timeout_error(dev, "reset timeout");
+ dev->reset_failed = 1;
+ return -ETIMEDOUT;
+ }
+}
+
+static void emac_hash_mc(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u16 gaht[4] = { 0 };
+ struct dev_mc_list *dmi;
+
+ DBG(dev, "hash_mc %d" NL, dev->ndev->mc_count);
+
+ for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) {
+ int bit;
+ DBG2(dev, "mc %02x:%02x:%02x:%02x:%02x:%02x" NL,
+ dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
+ dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]);
+
+ bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26);
+ gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f);
+ }
+ out_be32(&p->gaht1, gaht[0]);
+ out_be32(&p->gaht2, gaht[1]);
+ out_be32(&p->gaht3, gaht[2]);
+ out_be32(&p->gaht4, gaht[3]);
+}
+
+static inline u32 emac_iff2rmr(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ u32 r;
+
+ r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
+
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r |= EMAC4_RMR_BASE;
+ else
+ r |= EMAC_RMR_BASE;
+
+ if (ndev->flags & IFF_PROMISC)
+ r |= EMAC_RMR_PME;
+ else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32)
+ r |= EMAC_RMR_PMME;
+ else if (ndev->mc_count > 0)
+ r |= EMAC_RMR_MAE;
+
+ return r;
+}
+
+static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
+
+ DBG2(dev, "__emac_calc_base_mr1" NL);
+
+ switch(tx_size) {
+ case 2048:
+ ret |= EMAC_MR1_TFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, tx_size);
+ }
+
+ switch(rx_size) {
+ case 16384:
+ ret |= EMAC_MR1_RFS_16K;
+ break;
+ case 4096:
+ ret |= EMAC_MR1_RFS_4K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, rx_size);
+ }
+
+ return ret;
+}
+
+static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
+ EMAC4_MR1_OBCI(dev->opb_bus_freq);
+
+ DBG2(dev, "__emac4_calc_base_mr1" NL);
+
+ switch(tx_size) {
+ case 4096:
+ ret |= EMAC4_MR1_TFS_4K;
+ break;
+ case 2048:
+ ret |= EMAC4_MR1_TFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, tx_size);
+ }
+
+ switch(rx_size) {
+ case 16384:
+ ret |= EMAC4_MR1_RFS_16K;
+ break;
+ case 4096:
+ ret |= EMAC4_MR1_RFS_4K;
+ break;
+ case 2048:
+ ret |= EMAC4_MR1_RFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, rx_size);
+ }
+
+ return ret;
+}
+
+static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
+ __emac4_calc_base_mr1(dev, tx_size, rx_size) :
+ __emac_calc_base_mr1(dev, tx_size, rx_size);
+}
+
+static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
+{
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
+ else
+ return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
+}
+
+static inline u32 emac_calc_rwmr(struct emac_instance *dev,
+ unsigned int low, unsigned int high)
+{
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ return (low << 22) | ( (high & 0x3ff) << 6);
+ else
+ return (low << 23) | ( (high & 0x1ff) << 7);
+}
+
+static int emac_configure(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ struct net_device *ndev = dev->ndev;
+ int tx_size, rx_size;
+ u32 r, mr1 = 0;
+
+ DBG(dev, "configure" NL);
+
+ if (emac_reset(dev) < 0)
+ return -ETIMEDOUT;
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_reset(dev->tah_dev);
+
+ DBG(dev, " duplex = %d, pause = %d, asym_pause = %d\n",
+ dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
+
+ /* Default fifo sizes */
+ tx_size = dev->tx_fifo_size;
+ rx_size = dev->rx_fifo_size;
+
+ /* Check for full duplex */
+ if (dev->phy.duplex == DUPLEX_FULL)
+ mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
+
+ /* Adjust fifo sizes, mr1 and timeouts based on link speed */
+ dev->stop_timeout = STOP_TIMEOUT_10;
+ switch (dev->phy.speed) {
+ case SPEED_1000:
+ if (emac_phy_gpcs(dev->phy.mode)) {
+ mr1 |= EMAC_MR1_MF_1000GPCS |
+ EMAC_MR1_MF_IPPA(dev->phy.address);
+
+ /* Put some arbitrary OUI, Manuf & Rev IDs so we can
+ * identify this GPCS PHY later.
+ */
+ out_be32(&p->ipcr, 0xdeadbeef);
+ } else
+ mr1 |= EMAC_MR1_MF_1000;
+
+ /* Extended fifo sizes */
+ tx_size = dev->tx_fifo_size_gige;
+ rx_size = dev->rx_fifo_size_gige;
+
+ if (dev->ndev->mtu > ETH_DATA_LEN) {
+ mr1 |= EMAC_MR1_JPSM;
+ dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
+ } else
+ dev->stop_timeout = STOP_TIMEOUT_1000;
+ break;
+ case SPEED_100:
+ mr1 |= EMAC_MR1_MF_100;
+ dev->stop_timeout = STOP_TIMEOUT_100;
+ break;
+ default: /* make gcc happy */
+ break;
+ }
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
+ dev->phy.speed);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
+
+ /* on 40x erratum forces us to NOT use integrated flow control,
+ * let's hope it works on 44x ;)
+ */
+ if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
+ dev->phy.duplex == DUPLEX_FULL) {
+ if (dev->phy.pause)
+ mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
+ else if (dev->phy.asym_pause)
+ mr1 |= EMAC_MR1_APP;
+ }
+
+ /* Add base settings & fifo sizes & program MR1 */
+ mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
+ out_be32(&p->mr1, mr1);
+
+ /* Set individual MAC address */
+ out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
+ out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
+ (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
+ ndev->dev_addr[5]);
+
+ /* VLAN Tag Protocol ID */
+ out_be32(&p->vtpid, 0x8100);
+
+ /* Receive mode register */
+ r = emac_iff2rmr(ndev);
+ if (r & EMAC_RMR_MAE)
+ emac_hash_mc(dev);
+ out_be32(&p->rmr, r);
+
+ /* FIFOs thresholds */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
+ tx_size / 2 / dev->fifo_entry_size);
+ else
+ r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
+ tx_size / 2 / dev->fifo_entry_size);
+ out_be32(&p->tmr1, r);
+ out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
+
+ /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
+ there should be still enough space in FIFO to allow the our link
+ partner time to process this frame and also time to send PAUSE
+ frame itself.
+
+ Here is the worst case scenario for the RX FIFO "headroom"
+ (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
+
+ 1) One maximum-length frame on TX 1522 bytes
+ 2) One PAUSE frame time 64 bytes
+ 3) PAUSE frame decode time allowance 64 bytes
+ 4) One maximum-length frame on RX 1522 bytes
+ 5) Round-trip propagation delay of the link (100Mb) 15 bytes
+ ----------
+ 3187 bytes
+
+ I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
+ low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
+ */
+ r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
+ rx_size / 4 / dev->fifo_entry_size);
+ out_be32(&p->rwmr, r);
+
+ /* Set PAUSE timer to the maximum */
+ out_be32(&p->ptr, 0xffff);
+
+ /* IRQ sources */
+ r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
+ EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
+ EMAC_ISR_IRE | EMAC_ISR_TE;
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
+ EMAC4_ISR_RXOE | */;
+ out_be32(&p->iser, r);
+
+ /* We need to take GPCS PHY out of isolate mode after EMAC reset */
+ if (emac_phy_gpcs(dev->phy.mode))
+ emac_mii_reset_phy(&dev->phy);
+
+ return 0;
+}
+
+static void emac_reinitialize(struct emac_instance *dev)
+{
+ DBG(dev, "reinitialize" NL);
+
+ emac_netif_stop(dev);
+ if (!emac_configure(dev)) {
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+ }
+ emac_netif_start(dev);
+}
+
+static void emac_full_tx_reset(struct emac_instance *dev)
+{
+ DBG(dev, "full_tx_reset" NL);
+
+ emac_tx_disable(dev);
+ mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
+ emac_clean_tx_ring(dev);
+ dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
+
+ emac_configure(dev);
+
+ mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+}
+
+static void emac_reset_work(struct work_struct *work)
+{
+ struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
+
+ DBG(dev, "reset_work" NL);
+
+ mutex_lock(&dev->link_lock);
+ emac_netif_stop(dev);
+ emac_full_tx_reset(dev);
+ emac_netif_start(dev);
+ mutex_unlock(&dev->link_lock);
+}
+
+static void emac_tx_timeout(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "tx_timeout" NL);
+
+ schedule_work(&dev->reset_work);
+}
+
+
+static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
+{
+ int done = !!(stacr & EMAC_STACR_OC);
+
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ done = !done;
+
+ return done;
+};
+
+static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r = 0;
+ int n, err = -ETIMEDOUT;
+
+ mutex_lock(&dev->mdio_lock);
+
+ DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
+
+ /* Enable proper MDIO port */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+
+ /* Wait for management interface to become idle */
+ n = 10;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait idle\n");
+ goto bail;
+ }
+ }
+
+ /* Issue read command */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_STACR_BASE(dev->opb_bus_freq);
+ else
+ r = EMAC_STACR_BASE(dev->opb_bus_freq);
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ r |= EMAC_STACR_OC;
+ if (emac_has_feature(dev, EMAC_FTR_HAS_AXON_STACR))
+ r |= EMACX_STACR_STAC_READ;
+ else
+ r |= EMAC_STACR_STAC_READ;
+ r |= (reg & EMAC_STACR_PRA_MASK)
+ | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
+ out_be32(&p->stacr, r);
+
+ /* Wait for read to complete */
+ n = 100;
+ while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait complete\n");
+ goto bail;
+ }
+ }
+
+ if (unlikely(r & EMAC_STACR_PHYE)) {
+ DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
+ err = -EREMOTEIO;
+ goto bail;
+ }
+
+ r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
+
+ DBG2(dev, "mdio_read -> %04x" NL, r);
+ err = 0;
+ bail:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
+ mutex_unlock(&dev->mdio_lock);
+
+ return err == 0 ? r : err;
+}
+
+static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
+ u16 val)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r = 0;
+ int n, err = -ETIMEDOUT;
+
+ mutex_lock(&dev->mdio_lock);
+
+ DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
+
+ /* Enable proper MDIO port */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+
+ /* Wait for management interface to be idle */
+ n = 10;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait idle\n");
+ goto bail;
+ }
+ }
+
+ /* Issue write command */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_STACR_BASE(dev->opb_bus_freq);
+ else
+ r = EMAC_STACR_BASE(dev->opb_bus_freq);
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ r |= EMAC_STACR_OC;
+ if (emac_has_feature(dev, EMAC_FTR_HAS_AXON_STACR))
+ r |= EMACX_STACR_STAC_WRITE;
+ else
+ r |= EMAC_STACR_STAC_WRITE;
+ r |= (reg & EMAC_STACR_PRA_MASK) |
+ ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
+ (val << EMAC_STACR_PHYD_SHIFT);
+ out_be32(&p->stacr, r);
+
+ /* Wait for write to complete */
+ n = 100;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait complete\n");
+ goto bail;
+ }
+ }
+ err = 0;
+ bail:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
+ mutex_unlock(&dev->mdio_lock);
+}
+
+static int emac_mdio_read(struct net_device *ndev, int id, int reg)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res;
+
+ res = __emac_mdio_read(dev->mdio_instance ? dev->mdio_instance : dev,
+ (u8) id, (u8) reg);
+ return res;
+}
+
+static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ __emac_mdio_write(dev->mdio_instance ? dev->mdio_instance : dev,
+ (u8) id, (u8) reg, (u16) val);
+}
+
+/* Tx lock BH */
+static void __emac_set_multicast_list(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 rmr = emac_iff2rmr(dev->ndev);
+
+ DBG(dev, "__multicast %08x" NL, rmr);
+
+ /* I decided to relax register access rules here to avoid
+ * full EMAC reset.
+ *
+ * There is a real problem with EMAC4 core if we use MWSW_001 bit
+ * in MR1 register and do a full EMAC reset.
+ * One TX BD status update is delayed and, after EMAC reset, it
+ * never happens, resulting in TX hung (it'll be recovered by TX
+ * timeout handler eventually, but this is just gross).
+ * So we either have to do full TX reset or try to cheat here :)
+ *
+ * The only required change is to RX mode register, so I *think* all
+ * we need is just to stop RX channel. This seems to work on all
+ * tested SoCs. --ebs
+ *
+ * If we need the full reset, we might just trigger the workqueue
+ * and do it async... a bit nasty but should work --BenH
+ */
+ dev->mcast_pending = 0;
+ emac_rx_disable(dev);
+ if (rmr & EMAC_RMR_MAE)
+ emac_hash_mc(dev);
+ out_be32(&p->rmr, rmr);
+ emac_rx_enable(dev);
+}
+
+/* Tx lock BH */
+static void emac_set_multicast_list(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "multicast" NL);
+
+ BUG_ON(!netif_running(dev->ndev));
+
+ if (dev->no_mcast) {
+ dev->mcast_pending = 1;
+ return;
+ }
+ __emac_set_multicast_list(dev);
+}
+
+static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
+{
+ int rx_sync_size = emac_rx_sync_size(new_mtu);
+ int rx_skb_size = emac_rx_skb_size(new_mtu);
+ int i, ret = 0;
+
+ mutex_lock(&dev->link_lock);
+ emac_netif_stop(dev);
+ emac_rx_disable(dev);
+ mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
+
+ if (dev->rx_sg_skb) {
+ ++dev->estats.rx_dropped_resize;
+ dev_kfree_skb(dev->rx_sg_skb);
+ dev->rx_sg_skb = NULL;
+ }
+
+ /* Make a first pass over RX ring and mark BDs ready, dropping
+ * non-processed packets on the way. We need this as a separate pass
+ * to simplify error recovery in the case of allocation failure later.
+ */
+ for (i = 0; i < NUM_RX_BUFF; ++i) {
+ if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
+ ++dev->estats.rx_dropped_resize;
+
+ dev->rx_desc[i].data_len = 0;
+ dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
+ (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
+ }
+
+ /* Reallocate RX ring only if bigger skb buffers are required */
+ if (rx_skb_size <= dev->rx_skb_size)
+ goto skip;
+
+ /* Second pass, allocate new skbs */
+ for (i = 0; i < NUM_RX_BUFF; ++i) {
+ struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
+ if (!skb) {
+ ret = -ENOMEM;
+ goto oom;
+ }
+
+ BUG_ON(!dev->rx_skb[i]);
+ dev_kfree_skb(dev->rx_skb[i]);
+
+ skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
+ dev->rx_desc[i].data_ptr =
+ dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
+ DMA_FROM_DEVICE) + 2;
+ dev->rx_skb[i] = skb;
+ }
+ skip:
+ /* Check if we need to change "Jumbo" bit in MR1 */
+ if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) {
+ /* This is to prevent starting RX channel in emac_rx_enable() */
+ set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+
+ dev->ndev->mtu = new_mtu;
+ emac_full_tx_reset(dev);
+ }
+
+ mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
+ oom:
+ /* Restart RX */
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ dev->rx_slot = 0;
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_rx_enable(dev);
+ emac_netif_start(dev);
+ mutex_unlock(&dev->link_lock);
+
+ return ret;
+}
+
+/* Process ctx, rtnl_lock semaphore */
+static int emac_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int ret = 0;
+
+ if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
+ return -EINVAL;
+
+ DBG(dev, "change_mtu(%d)" NL, new_mtu);
+
+ if (netif_running(ndev)) {
+ /* Check if we really need to reinitalize RX ring */
+ if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
+ ret = emac_resize_rx_ring(dev, new_mtu);
+ }
+
+ if (!ret) {
+ ndev->mtu = new_mtu;
+ dev->rx_skb_size = emac_rx_skb_size(new_mtu);
+ dev->rx_sync_size = emac_rx_sync_size(new_mtu);
+ }
+
+ return ret;
+}
+
+static void emac_clean_tx_ring(struct emac_instance *dev)
+{
+ int i;
+
+ for (i = 0; i < NUM_TX_BUFF; ++i) {
+ if (dev->tx_skb[i]) {
+ dev_kfree_skb(dev->tx_skb[i]);
+ dev->tx_skb[i] = NULL;
+ if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
+ ++dev->estats.tx_dropped;
+ }
+ dev->tx_desc[i].ctrl = 0;
+ dev->tx_desc[i].data_ptr = 0;
+ }
+}
+
+static void emac_clean_rx_ring(struct emac_instance *dev)
+{
+ int i;
+
+ for (i = 0; i < NUM_RX_BUFF; ++i)
+ if (dev->rx_skb[i]) {
+ dev->rx_desc[i].ctrl = 0;
+ dev_kfree_skb(dev->rx_skb[i]);
+ dev->rx_skb[i] = NULL;
+ dev->rx_desc[i].data_ptr = 0;
+ }
+
+ if (dev->rx_sg_skb) {
+ dev_kfree_skb(dev->rx_sg_skb);
+ dev->rx_sg_skb = NULL;
+ }
+}
+
+static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
+ gfp_t flags)
+{
+ struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
+ if (unlikely(!skb))
+ return -ENOMEM;
+
+ dev->rx_skb[slot] = skb;
+ dev->rx_desc[slot].data_len = 0;
+
+ skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
+ dev->rx_desc[slot].data_ptr =
+ dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
+ DMA_FROM_DEVICE) + 2;
+ wmb();
+ dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
+ (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
+
+ return 0;
+}
+
+static void emac_print_link_status(struct emac_instance *dev)
+{
+ if (netif_carrier_ok(dev->ndev))
+ printk(KERN_INFO "%s: link is up, %d %s%s\n",
+ dev->ndev->name, dev->phy.speed,
+ dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
+ dev->phy.pause ? ", pause enabled" :
+ dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
+ else
+ printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
+}
+
+/* Process ctx, rtnl_lock semaphore */
+static int emac_open(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int err, i;
+
+ DBG(dev, "open" NL);
+
+ /* Setup error IRQ handler */
+ err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
+ if (err) {
+ printk(KERN_ERR "%s: failed to request IRQ %d\n",
+ ndev->name, dev->emac_irq);
+ return err;
+ }
+
+ /* Allocate RX ring */
+ for (i = 0; i < NUM_RX_BUFF; ++i)
+ if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
+ printk(KERN_ERR "%s: failed to allocate RX ring\n",
+ ndev->name);
+ goto oom;
+ }
+
+ dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ dev->rx_sg_skb = NULL;
+
+ mutex_lock(&dev->link_lock);
+
+ /* XXX Start PHY polling now. Shouldn't wr do like sungem instead and
+ * always poll the PHY even when the iface is down ? That would allow
+ * things like laptop-net to work. --BenH
+ */
+ if (dev->phy.address >= 0) {
+ int link_poll_interval;
+ if (dev->phy.def->ops->poll_link(&dev->phy)) {
+ dev->phy.def->ops->read_link(&dev->phy);
+ netif_carrier_on(dev->ndev);
+ link_poll_interval = PHY_POLL_LINK_ON;
+ } else {
+ netif_carrier_off(dev->ndev);
+ link_poll_interval = PHY_POLL_LINK_OFF;
+ }
+ dev->link_polling = 1;
+ wmb();
+ schedule_delayed_work(&dev->link_work, link_poll_interval);
+ emac_print_link_status(dev);
+ } else
+ netif_carrier_on(dev->ndev);
+
+ emac_configure(dev);
+ mal_poll_add(dev->mal, &dev->commac);
+ mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
+ mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+ emac_netif_start(dev);
+
+ mutex_unlock(&dev->link_lock);
+
+ return 0;
+ oom:
+ emac_clean_rx_ring(dev);
+ free_irq(dev->emac_irq, dev);
+
+ return -ENOMEM;
+}
+
+/* BHs disabled */
+#if 0
+static int emac_link_differs(struct emac_instance *dev)
+{
+ u32 r = in_be32(&dev->emacp->mr1);
+
+ int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
+ int speed, pause, asym_pause;
+
+ if (r & EMAC_MR1_MF_1000)
+ speed = SPEED_1000;
+ else if (r & EMAC_MR1_MF_100)
+ speed = SPEED_100;
+ else
+ speed = SPEED_10;
+
+ switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
+ case (EMAC_MR1_EIFC | EMAC_MR1_APP):
+ pause = 1;
+ asym_pause = 0;
+ break;
+ case EMAC_MR1_APP:
+ pause = 0;
+ asym_pause = 1;
+ break;
+ default:
+ pause = asym_pause = 0;
+ }
+ return speed != dev->phy.speed || duplex != dev->phy.duplex ||
+ pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
+}
+#endif
+
+static void emac_link_timer(struct work_struct *work)
+{
+ struct emac_instance *dev =
+ container_of((struct delayed_work *)work,
+ struct emac_instance, link_work);
+ int link_poll_interval;
+
+ mutex_lock(&dev->link_lock);
+
+ DBG2(dev, "link timer" NL);
+
+ if (dev->phy.def->ops->poll_link(&dev->phy)) {
+ if (!netif_carrier_ok(dev->ndev)) {
+ /* Get new link parameters */
+ dev->phy.def->ops->read_link(&dev->phy);
+
+ netif_carrier_on(dev->ndev);
+ emac_netif_stop(dev);
+ emac_full_tx_reset(dev);
+ emac_netif_start(dev);
+ emac_print_link_status(dev);
+ }
+ link_poll_interval = PHY_POLL_LINK_ON;
+ } else {
+ if (netif_carrier_ok(dev->ndev)) {
+ emac_reinitialize(dev);
+ netif_carrier_off(dev->ndev);
+ netif_tx_disable(dev->ndev);
+ emac_print_link_status(dev);
+ }
+ link_poll_interval = PHY_POLL_LINK_OFF;
+ }
+ schedule_delayed_work(&dev->link_work, link_poll_interval);
+
+ mutex_unlock(&dev->link_lock);
+}
+
+static void emac_force_link_update(struct emac_instance *dev)
+{
+ netif_carrier_off(dev->ndev);
+ if (dev->link_polling) {
+ cancel_rearming_delayed_work(&dev->link_work);
+ if (dev->link_polling)
+ schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
+ }
+}
+
+/* Process ctx, rtnl_lock semaphore */
+static int emac_close(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "close" NL);
+
+ if (dev->phy.address >= 0)
+ cancel_rearming_delayed_work(&dev->link_work);
+
+ emac_netif_stop(dev);
+ flush_scheduled_work();
+
+ emac_rx_disable(dev);
+ emac_tx_disable(dev);
+ mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
+ mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
+ mal_poll_del(dev->mal, &dev->commac);
+
+ emac_clean_tx_ring(dev);
+ emac_clean_rx_ring(dev);
+
+ free_irq(dev->emac_irq, dev);
+
+ return 0;
+}
+
+static inline u16 emac_tx_csum(struct emac_instance *dev,
+ struct sk_buff *skb)
+{
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH &&
+ skb->ip_summed == CHECKSUM_PARTIAL)) {
+ ++dev->stats.tx_packets_csum;
+ return EMAC_TX_CTRL_TAH_CSUM;
+ }
+ return 0;
+}
+
+static inline int emac_xmit_finish(struct emac_instance *dev, int len)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ struct net_device *ndev = dev->ndev;
+
+ /* Send the packet out. If the if makes a significant perf
+ * difference, then we can store the TMR0 value in "dev"
+ * instead
+ */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ out_be32(&p->tmr0, EMAC_TMR0_XMIT);
+ else
+ out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
+
+ if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
+ netif_stop_queue(ndev);
+ DBG2(dev, "stopped TX queue" NL);
+ }
+
+ ndev->trans_start = jiffies;
+ ++dev->stats.tx_packets;
+ dev->stats.tx_bytes += len;
+
+ return 0;
+}
+
+/* Tx lock BH */
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ unsigned int len = skb->len;
+ int slot;
+
+ u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
+ MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
+
+ slot = dev->tx_slot++;
+ if (dev->tx_slot == NUM_TX_BUFF) {
+ dev->tx_slot = 0;
+ ctrl |= MAL_TX_CTRL_WRAP;
+ }
+
+ DBG2(dev, "xmit(%u) %d" NL, len, slot);
+
+ dev->tx_skb[slot] = skb;
+ dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
+ skb->data, len,
+ DMA_TO_DEVICE);
+ dev->tx_desc[slot].data_len = (u16) len;
+ wmb();
+ dev->tx_desc[slot].ctrl = ctrl;
+
+ return emac_xmit_finish(dev, len);
+}
+
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+static inline int emac_xmit_split(struct emac_instance *dev, int slot,
+ u32 pd, int len, int last, u16 base_ctrl)
+{
+ while (1) {
+ u16 ctrl = base_ctrl;
+ int chunk = min(len, MAL_MAX_TX_SIZE);
+ len -= chunk;
+
+ slot = (slot + 1) % NUM_TX_BUFF;
+
+ if (last && !len)
+ ctrl |= MAL_TX_CTRL_LAST;
+ if (slot == NUM_TX_BUFF - 1)
+ ctrl |= MAL_TX_CTRL_WRAP;
+
+ dev->tx_skb[slot] = NULL;
+ dev->tx_desc[slot].data_ptr = pd;
+ dev->tx_desc[slot].data_len = (u16) chunk;
+ dev->tx_desc[slot].ctrl = ctrl;
+ ++dev->tx_cnt;
+
+ if (!len)
+ break;
+
+ pd += chunk;
+ }
+ return slot;
+}
+
+/* Tx lock BH disabled (SG version for TAH equipped EMACs) */
+static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ int len = skb->len, chunk;
+ int slot, i;
+ u16 ctrl;
+ u32 pd;
+
+ /* This is common "fast" path */
+ if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
+ return emac_start_xmit(skb, ndev);
+
+ len -= skb->data_len;
+
+ /* Note, this is only an *estimation*, we can still run out of empty
+ * slots because of the additional fragmentation into
+ * MAL_MAX_TX_SIZE-sized chunks
+ */
+ if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
+ goto stop_queue;
+
+ ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
+ emac_tx_csum(dev, skb);
+ slot = dev->tx_slot;
+
+ /* skb data */
+ dev->tx_skb[slot] = NULL;
+ chunk = min(len, MAL_MAX_TX_SIZE);
+ dev->tx_desc[slot].data_ptr = pd =
+ dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
+ dev->tx_desc[slot].data_len = (u16) chunk;
+ len -= chunk;
+ if (unlikely(len))
+ slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
+ ctrl);
+ /* skb fragments */
+ for (i = 0; i < nr_frags; ++i) {
+ struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
+ len = frag->size;
+
+ if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
+ goto undo_frame;
+
+ pd = dma_map_page(&dev->ofdev->dev, frag->page, frag->page_offset, len,
+ DMA_TO_DEVICE);
+
+ slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
+ ctrl);
+ }
+
+ DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
+
+ /* Attach skb to the last slot so we don't release it too early */
+ dev->tx_skb[slot] = skb;
+
+ /* Send the packet out */
+ if (dev->tx_slot == NUM_TX_BUFF - 1)
+ ctrl |= MAL_TX_CTRL_WRAP;
+ wmb();
+ dev->tx_desc[dev->tx_slot].ctrl = ctrl;
+ dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
+
+ return emac_xmit_finish(dev, skb->len);
+
+ undo_frame:
+ /* Well, too bad. Our previous estimation was overly optimistic.
+ * Undo everything.
+ */
+ while (slot != dev->tx_slot) {
+ dev->tx_desc[slot].ctrl = 0;
+ --dev->tx_cnt;
+ if (--slot < 0)
+ slot = NUM_TX_BUFF - 1;
+ }
+ ++dev->estats.tx_undo;
+
+ stop_queue:
+ netif_stop_queue(ndev);
+ DBG2(dev, "stopped TX queue" NL);
+ return 1;
+}
+#else
+# define emac_start_xmit_sg emac_start_xmit
+#endif /* !defined(CONFIG_IBM_NEW_EMAC_TAH) */
+
+/* Tx lock BHs */
+static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
+{
+ struct emac_error_stats *st = &dev->estats;
+
+ DBG(dev, "BD TX error %04x" NL, ctrl);
+
+ ++st->tx_bd_errors;
+ if (ctrl & EMAC_TX_ST_BFCS)
+ ++st->tx_bd_bad_fcs;
+ if (ctrl & EMAC_TX_ST_LCS)
+ ++st->tx_bd_carrier_loss;
+ if (ctrl & EMAC_TX_ST_ED)
+ ++st->tx_bd_excessive_deferral;
+ if (ctrl & EMAC_TX_ST_EC)
+ ++st->tx_bd_excessive_collisions;
+ if (ctrl & EMAC_TX_ST_LC)
+ ++st->tx_bd_late_collision;
+ if (ctrl & EMAC_TX_ST_MC)
+ ++st->tx_bd_multple_collisions;
+ if (ctrl & EMAC_TX_ST_SC)
+ ++st->tx_bd_single_collision;
+ if (ctrl & EMAC_TX_ST_UR)
+ ++st->tx_bd_underrun;
+ if (ctrl & EMAC_TX_ST_SQE)
+ ++st->tx_bd_sqe;
+}
+
+static void emac_poll_tx(void *param)
+{
+ struct emac_instance *dev = param;
+ u32 bad_mask;
+
+ DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ bad_mask = EMAC_IS_BAD_TX_TAH;
+ else
+ bad_mask = EMAC_IS_BAD_TX;
+
+ netif_tx_lock_bh(dev->ndev);
+ if (dev->tx_cnt) {
+ u16 ctrl;
+ int slot = dev->ack_slot, n = 0;
+ again:
+ ctrl = dev->tx_desc[slot].ctrl;
+ if (!(ctrl & MAL_TX_CTRL_READY)) {
+ struct sk_buff *skb = dev->tx_skb[slot];
+ ++n;
+
+ if (skb) {
+ dev_kfree_skb(skb);
+ dev->tx_skb[slot] = NULL;
+ }
+ slot = (slot + 1) % NUM_TX_BUFF;
+
+ if (unlikely(ctrl & bad_mask))
+ emac_parse_tx_error(dev, ctrl);
+
+ if (--dev->tx_cnt)
+ goto again;
+ }
+ if (n) {
+ dev->ack_slot = slot;
+ if (netif_queue_stopped(dev->ndev) &&
+ dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
+ netif_wake_queue(dev->ndev);
+
+ DBG2(dev, "tx %d pkts" NL, n);
+ }
+ }
+ netif_tx_unlock_bh(dev->ndev);
+}
+
+static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
+ int len)
+{
+ struct sk_buff *skb = dev->rx_skb[slot];
+
+ DBG2(dev, "recycle %d %d" NL, slot, len);
+
+ if (len)
+ dma_map_single(&dev->ofdev->dev, skb->data - 2,
+ EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
+
+ dev->rx_desc[slot].data_len = 0;
+ wmb();
+ dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
+ (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
+}
+
+static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
+{
+ struct emac_error_stats *st = &dev->estats;
+
+ DBG(dev, "BD RX error %04x" NL, ctrl);
+
+ ++st->rx_bd_errors;
+ if (ctrl & EMAC_RX_ST_OE)
+ ++st->rx_bd_overrun;
+ if (ctrl & EMAC_RX_ST_BP)
+ ++st->rx_bd_bad_packet;
+ if (ctrl & EMAC_RX_ST_RP)
+ ++st->rx_bd_runt_packet;
+ if (ctrl & EMAC_RX_ST_SE)
+ ++st->rx_bd_short_event;
+ if (ctrl & EMAC_RX_ST_AE)
+ ++st->rx_bd_alignment_error;
+ if (ctrl & EMAC_RX_ST_BFCS)
+ ++st->rx_bd_bad_fcs;
+ if (ctrl & EMAC_RX_ST_PTL)
+ ++st->rx_bd_packet_too_long;
+ if (ctrl & EMAC_RX_ST_ORE)
+ ++st->rx_bd_out_of_range;
+ if (ctrl & EMAC_RX_ST_IRE)
+ ++st->rx_bd_in_range;
+}
+
+static inline void emac_rx_csum(struct emac_instance *dev,
+ struct sk_buff *skb, u16 ctrl)
+{
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+ if (!ctrl && dev->tah_dev) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ ++dev->stats.rx_packets_csum;
+ }
+#endif
+}
+
+static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
+{
+ if (likely(dev->rx_sg_skb != NULL)) {
+ int len = dev->rx_desc[slot].data_len;
+ int tot_len = dev->rx_sg_skb->len + len;
+
+ if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
+ ++dev->estats.rx_dropped_mtu;
+ dev_kfree_skb(dev->rx_sg_skb);
+ dev->rx_sg_skb = NULL;
+ } else {
+ cacheable_memcpy(dev->rx_sg_skb->tail,
+ dev->rx_skb[slot]->data, len);
+ skb_put(dev->rx_sg_skb, len);
+ emac_recycle_rx_skb(dev, slot, len);
+ return 0;
+ }
+ }
+ emac_recycle_rx_skb(dev, slot, 0);
+ return -1;
+}
+
+/* NAPI poll context */
+static int emac_poll_rx(void *param, int budget)
+{
+ struct emac_instance *dev = param;
+ int slot = dev->rx_slot, received = 0;
+
+ DBG2(dev, "poll_rx(%d)" NL, budget);
+
+ again:
+ while (budget > 0) {
+ int len;
+ struct sk_buff *skb;
+ u16 ctrl = dev->rx_desc[slot].ctrl;
+
+ if (ctrl & MAL_RX_CTRL_EMPTY)
+ break;
+
+ skb = dev->rx_skb[slot];
+ mb();
+ len = dev->rx_desc[slot].data_len;
+
+ if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
+ goto sg;
+
+ ctrl &= EMAC_BAD_RX_MASK;
+ if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
+ emac_parse_rx_error(dev, ctrl);
+ ++dev->estats.rx_dropped_error;
+ emac_recycle_rx_skb(dev, slot, 0);
+ len = 0;
+ goto next;
+ }
+
+ if (len && len < EMAC_RX_COPY_THRESH) {
+ struct sk_buff *copy_skb =
+ alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
+ if (unlikely(!copy_skb))
+ goto oom;
+
+ skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
+ cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
+ len + 2);
+ emac_recycle_rx_skb(dev, slot, len);
+ skb = copy_skb;
+ } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
+ goto oom;
+
+ skb_put(skb, len);
+ push_packet:
+ skb->dev = dev->ndev;
+ skb->protocol = eth_type_trans(skb, dev->ndev);
+ emac_rx_csum(dev, skb, ctrl);
+
+ if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
+ ++dev->estats.rx_dropped_stack;
+ next:
+ ++dev->stats.rx_packets;
+ skip:
+ dev->stats.rx_bytes += len;
+ slot = (slot + 1) % NUM_RX_BUFF;
+ --budget;
+ ++received;
+ continue;
+ sg:
+ if (ctrl & MAL_RX_CTRL_FIRST) {
+ BUG_ON(dev->rx_sg_skb);
+ if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
+ DBG(dev, "rx OOM %d" NL, slot);
+ ++dev->estats.rx_dropped_oom;
+ emac_recycle_rx_skb(dev, slot, 0);
+ } else {
+ dev->rx_sg_skb = skb;
+ skb_put(skb, len);
+ }
+ } else if (!emac_rx_sg_append(dev, slot) &&
+ (ctrl & MAL_RX_CTRL_LAST)) {
+
+ skb = dev->rx_sg_skb;
+ dev->rx_sg_skb = NULL;
+
+ ctrl &= EMAC_BAD_RX_MASK;
+ if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
+ emac_parse_rx_error(dev, ctrl);
+ ++dev->estats.rx_dropped_error;
+ dev_kfree_skb(skb);
+ len = 0;
+ } else
+ goto push_packet;
+ }
+ goto skip;
+ oom:
+ DBG(dev, "rx OOM %d" NL, slot);
+ /* Drop the packet and recycle skb */
+ ++dev->estats.rx_dropped_oom;
+ emac_recycle_rx_skb(dev, slot, 0);
+ goto next;
+ }
+
+ if (received) {
+ DBG2(dev, "rx %d BDs" NL, received);
+ dev->rx_slot = slot;
+ }
+
+ if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
+ mb();
+ if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
+ DBG2(dev, "rx restart" NL);
+ received = 0;
+ goto again;
+ }
+
+ if (dev->rx_sg_skb) {
+ DBG2(dev, "dropping partial rx packet" NL);
+ ++dev->estats.rx_dropped_error;
+ dev_kfree_skb(dev->rx_sg_skb);
+ dev->rx_sg_skb = NULL;
+ }
+
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_rx_enable(dev);
+ dev->rx_slot = 0;
+ }
+ return received;
+}
+
+/* NAPI poll context */
+static int emac_peek_rx(void *param)
+{
+ struct emac_instance *dev = param;
+
+ return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
+}
+
+/* NAPI poll context */
+static int emac_peek_rx_sg(void *param)
+{
+ struct emac_instance *dev = param;
+
+ int slot = dev->rx_slot;
+ while (1) {
+ u16 ctrl = dev->rx_desc[slot].ctrl;
+ if (ctrl & MAL_RX_CTRL_EMPTY)
+ return 0;
+ else if (ctrl & MAL_RX_CTRL_LAST)
+ return 1;
+
+ slot = (slot + 1) % NUM_RX_BUFF;
+
+ /* I'm just being paranoid here :) */
+ if (unlikely(slot == dev->rx_slot))
+ return 0;
+ }
+}
+
+/* Hard IRQ */
+static void emac_rxde(void *param)
+{
+ struct emac_instance *dev = param;
+
+ ++dev->estats.rx_stopped;
+ emac_rx_disable_async(dev);
+}
+
+/* Hard IRQ */
+static irqreturn_t emac_irq(int irq, void *dev_instance)
+{
+ struct emac_instance *dev = dev_instance;
+ struct emac_regs __iomem *p = dev->emacp;
+ struct emac_error_stats *st = &dev->estats;
+ u32 isr;
+
+ spin_lock(&dev->lock);
+
+ isr = in_be32(&p->isr);
+ out_be32(&p->isr, isr);
+
+ DBG(dev, "isr = %08x" NL, isr);
+
+ if (isr & EMAC4_ISR_TXPE)
+ ++st->tx_parity;
+ if (isr & EMAC4_ISR_RXPE)
+ ++st->rx_parity;
+ if (isr & EMAC4_ISR_TXUE)
+ ++st->tx_underrun;
+ if (isr & EMAC4_ISR_RXOE)
+ ++st->rx_fifo_overrun;
+ if (isr & EMAC_ISR_OVR)
+ ++st->rx_overrun;
+ if (isr & EMAC_ISR_BP)
+ ++st->rx_bad_packet;
+ if (isr & EMAC_ISR_RP)
+ ++st->rx_runt_packet;
+ if (isr & EMAC_ISR_SE)
+ ++st->rx_short_event;
+ if (isr & EMAC_ISR_ALE)
+ ++st->rx_alignment_error;
+ if (isr & EMAC_ISR_BFCS)
+ ++st->rx_bad_fcs;
+ if (isr & EMAC_ISR_PTLE)
+ ++st->rx_packet_too_long;
+ if (isr & EMAC_ISR_ORE)
+ ++st->rx_out_of_range;
+ if (isr & EMAC_ISR_IRE)
+ ++st->rx_in_range;
+ if (isr & EMAC_ISR_SQE)
+ ++st->tx_sqe;
+ if (isr & EMAC_ISR_TE)
+ ++st->tx_errors;
+
+ spin_unlock(&dev->lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct net_device_stats *emac_stats(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ struct emac_stats *st = &dev->stats;
+ struct emac_error_stats *est = &dev->estats;
+ struct net_device_stats *nst = &dev->nstats;
+ unsigned long flags;
+
+ DBG2(dev, "stats" NL);
+
+ /* Compute "legacy" statistics */
+ spin_lock_irqsave(&dev->lock, flags);
+ nst->rx_packets = (unsigned long)st->rx_packets;
+ nst->rx_bytes = (unsigned long)st->rx_bytes;
+ nst->tx_packets = (unsigned long)st->tx_packets;
+ nst->tx_bytes = (unsigned long)st->tx_bytes;
+ nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
+ est->rx_dropped_error +
+ est->rx_dropped_resize +
+ est->rx_dropped_mtu);
+ nst->tx_dropped = (unsigned long)est->tx_dropped;
+
+ nst->rx_errors = (unsigned long)est->rx_bd_errors;
+ nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
+ est->rx_fifo_overrun +
+ est->rx_overrun);
+ nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
+ est->rx_alignment_error);
+ nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
+ est->rx_bad_fcs);
+ nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
+ est->rx_bd_short_event +
+ est->rx_bd_packet_too_long +
+ est->rx_bd_out_of_range +
+ est->rx_bd_in_range +
+ est->rx_runt_packet +
+ est->rx_short_event +
+ est->rx_packet_too_long +
+ est->rx_out_of_range +
+ est->rx_in_range);
+
+ nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
+ nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
+ est->tx_underrun);
+ nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
+ nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
+ est->tx_bd_excessive_collisions +
+ est->tx_bd_late_collision +
+ est->tx_bd_multple_collisions);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return nst;
+}
+
+static struct mal_commac_ops emac_commac_ops = {
+ .poll_tx = &emac_poll_tx,
+ .poll_rx = &emac_poll_rx,
+ .peek_rx = &emac_peek_rx,
+ .rxde = &emac_rxde,
+};
+
+static struct mal_commac_ops emac_commac_sg_ops = {
+ .poll_tx = &emac_poll_tx,
+ .poll_rx = &emac_poll_rx,
+ .peek_rx = &emac_peek_rx_sg,
+ .rxde = &emac_rxde,
+};
+
+/* Ethtool support */
+static int emac_ethtool_get_settings(struct net_device *ndev,
+ struct ethtool_cmd *cmd)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ cmd->supported = dev->phy.features;
+ cmd->port = PORT_MII;
+ cmd->phy_address = dev->phy.address;
+ cmd->transceiver =
+ dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
+
+ mutex_lock(&dev->link_lock);
+ cmd->advertising = dev->phy.advertising;
+ cmd->autoneg = dev->phy.autoneg;
+ cmd->speed = dev->phy.speed;
+ cmd->duplex = dev->phy.duplex;
+ mutex_unlock(&dev->link_lock);
+
+ return 0;
+}
+
+static int emac_ethtool_set_settings(struct net_device *ndev,
+ struct ethtool_cmd *cmd)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ u32 f = dev->phy.features;
+
+ DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
+ cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
+
+ /* Basic sanity checks */
+ if (dev->phy.address < 0)
+ return -EOPNOTSUPP;
+ if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
+ return -EINVAL;
+ if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
+ return -EINVAL;
+ if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
+ return -EINVAL;
+
+ if (cmd->autoneg == AUTONEG_DISABLE) {
+ switch (cmd->speed) {
+ case SPEED_10:
+ if (cmd->duplex == DUPLEX_HALF
+ && !(f & SUPPORTED_10baseT_Half))
+ return -EINVAL;
+ if (cmd->duplex == DUPLEX_FULL
+ && !(f & SUPPORTED_10baseT_Full))
+ return -EINVAL;
+ break;
+ case SPEED_100:
+ if (cmd->duplex == DUPLEX_HALF
+ && !(f & SUPPORTED_100baseT_Half))
+ return -EINVAL;
+ if (cmd->duplex == DUPLEX_FULL
+ && !(f & SUPPORTED_100baseT_Full))
+ return -EINVAL;
+ break;
+ case SPEED_1000:
+ if (cmd->duplex == DUPLEX_HALF
+ && !(f & SUPPORTED_1000baseT_Half))
+ return -EINVAL;
+ if (cmd->duplex == DUPLEX_FULL
+ && !(f & SUPPORTED_1000baseT_Full))
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(&dev->link_lock);
+ dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
+ cmd->duplex);
+ mutex_unlock(&dev->link_lock);
+
+ } else {
+ if (!(f & SUPPORTED_Autoneg))
+ return -EINVAL;
+
+ mutex_lock(&dev->link_lock);
+ dev->phy.def->ops->setup_aneg(&dev->phy,
+ (cmd->advertising & f) |
+ (dev->phy.advertising &
+ (ADVERTISED_Pause |
+ ADVERTISED_Asym_Pause)));
+ mutex_unlock(&dev->link_lock);
+ }
+ emac_force_link_update(dev);
+
+ return 0;
+}
+
+static void emac_ethtool_get_ringparam(struct net_device *ndev,
+ struct ethtool_ringparam *rp)
+{
+ rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
+ rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
+}
+
+static void emac_ethtool_get_pauseparam(struct net_device *ndev,
+ struct ethtool_pauseparam *pp)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ mutex_lock(&dev->link_lock);
+ if ((dev->phy.features & SUPPORTED_Autoneg) &&
+ (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
+ pp->autoneg = 1;
+
+ if (dev->phy.duplex == DUPLEX_FULL) {
+ if (dev->phy.pause)
+ pp->rx_pause = pp->tx_pause = 1;
+ else if (dev->phy.asym_pause)
+ pp->tx_pause = 1;
+ }
+ mutex_unlock(&dev->link_lock);
+}
+
+static u32 emac_ethtool_get_rx_csum(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ return dev->tah_dev != 0;
+}
+
+static int emac_get_regs_len(struct emac_instance *dev)
+{
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ EMAC4_ETHTOOL_REGS_SIZE;
+ else
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ EMAC_ETHTOOL_REGS_SIZE;
+}
+
+static int emac_ethtool_get_regs_len(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int size;
+
+ size = sizeof(struct emac_ethtool_regs_hdr) +
+ emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ size += zmii_get_regs_len(dev->zmii_dev);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ size += rgmii_get_regs_len(dev->rgmii_dev);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ size += tah_get_regs_len(dev->tah_dev);
+
+ return size;
+}
+
+static void *emac_dump_regs(struct emac_instance *dev, void *buf)
+{
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+
+ hdr->index = dev->cell_index;
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
+ hdr->version = EMAC4_ETHTOOL_REGS_VER;
+ memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE);
+ return ((void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE);
+ } else {
+ hdr->version = EMAC_ETHTOOL_REGS_VER;
+ memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE);
+ return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE);
+ }
+}
+
+static void emac_ethtool_get_regs(struct net_device *ndev,
+ struct ethtool_regs *regs, void *buf)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ struct emac_ethtool_regs_hdr *hdr = buf;
+
+ hdr->components = 0;
+ buf = hdr + 1;
+
+ buf = mal_dump_regs(dev->mal, buf);
+ buf = emac_dump_regs(dev, buf);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
+ buf = zmii_dump_regs(dev->zmii_dev, buf);
+ }
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
+ buf = rgmii_dump_regs(dev->rgmii_dev, buf);
+ }
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_TAH;
+ buf = tah_dump_regs(dev->tah_dev, buf);
+ }
+}
+
+static int emac_ethtool_nway_reset(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res = 0;
+
+ DBG(dev, "nway_reset" NL);
+
+ if (dev->phy.address < 0)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&dev->link_lock);
+ if (!dev->phy.autoneg) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
+ out:
+ mutex_unlock(&dev->link_lock);
+ emac_force_link_update(dev);
+ return res;
+}
+
+static int emac_ethtool_get_stats_count(struct net_device *ndev)
+{
+ return EMAC_ETHTOOL_STATS_COUNT;
+}
+
+static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
+ u8 * buf)
+{
+ if (stringset == ETH_SS_STATS)
+ memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
+}
+
+static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
+ struct ethtool_stats *estats,
+ u64 * tmp_stats)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
+ tmp_stats += sizeof(dev->stats) / sizeof(u64);
+ memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
+}
+
+static void emac_ethtool_get_drvinfo(struct net_device *ndev,
+ struct ethtool_drvinfo *info)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ strcpy(info->driver, "ibm_emac");
+ strcpy(info->version, DRV_VERSION);
+ info->fw_version[0] = '\0';
+ sprintf(info->bus_info, "PPC 4xx EMAC-%d %s",
+ dev->cell_index, dev->ofdev->node->full_name);
+ info->n_stats = emac_ethtool_get_stats_count(ndev);
+ info->regdump_len = emac_ethtool_get_regs_len(ndev);
+}
+
+static const struct ethtool_ops emac_ethtool_ops = {
+ .get_settings = emac_ethtool_get_settings,
+ .set_settings = emac_ethtool_set_settings,
+ .get_drvinfo = emac_ethtool_get_drvinfo,
+
+ .get_regs_len = emac_ethtool_get_regs_len,
+ .get_regs = emac_ethtool_get_regs,
+
+ .nway_reset = emac_ethtool_nway_reset,
+
+ .get_ringparam = emac_ethtool_get_ringparam,
+ .get_pauseparam = emac_ethtool_get_pauseparam,
+
+ .get_rx_csum = emac_ethtool_get_rx_csum,
+
+ .get_strings = emac_ethtool_get_strings,
+ .get_stats_count = emac_ethtool_get_stats_count,
+ .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
+
+ .get_link = ethtool_op_get_link,
+ .get_tx_csum = ethtool_op_get_tx_csum,
+ .get_sg = ethtool_op_get_sg,
+};
+
+static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ uint16_t *data = (uint16_t *) & rq->ifr_ifru;
+
+ DBG(dev, "ioctl %08x" NL, cmd);
+
+ if (dev->phy.address < 0)
+ return -EOPNOTSUPP;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ case SIOCDEVPRIVATE:
+ data[0] = dev->phy.address;
+ /* Fall through */
+ case SIOCGMIIREG:
+ case SIOCDEVPRIVATE + 1:
+ data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]);
+ return 0;
+
+ case SIOCSMIIREG:
+ case SIOCDEVPRIVATE + 2:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ emac_mdio_write(ndev, dev->phy.address, data[1], data[2]);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+struct emac_depentry {
+ u32 phandle;
+ struct device_node *node;
+ struct of_device *ofdev;
+ void *drvdata;
+};
+
+#define EMAC_DEP_MAL_IDX 0
+#define EMAC_DEP_ZMII_IDX 1
+#define EMAC_DEP_RGMII_IDX 2
+#define EMAC_DEP_TAH_IDX 3
+#define EMAC_DEP_MDIO_IDX 4
+#define EMAC_DEP_PREV_IDX 5
+#define EMAC_DEP_COUNT 6
+
+static int __devinit emac_check_deps(struct emac_instance *dev,
+ struct emac_depentry *deps)
+{
+ int i, there = 0;
+ struct device_node *np;
+
+ for (i = 0; i < EMAC_DEP_COUNT; i++) {
+ /* no dependency on that item, allright */
+ if (deps[i].phandle == 0) {
+ there++;
+ continue;
+ }
+ /* special case for blist as the dependency might go away */
+ if (i == EMAC_DEP_PREV_IDX) {
+ np = *(dev->blist - 1);
+ if (np == NULL) {
+ deps[i].phandle = 0;
+ there++;
+ continue;
+ }
+ if (deps[i].node == NULL)
+ deps[i].node = of_node_get(np);
+ }
+ if (deps[i].node == NULL)
+ deps[i].node = of_find_node_by_phandle(deps[i].phandle);
+ if (deps[i].node == NULL)
+ continue;
+ if (deps[i].ofdev == NULL)
+ deps[i].ofdev = of_find_device_by_node(deps[i].node);
+ if (deps[i].ofdev == NULL)
+ continue;
+ if (deps[i].drvdata == NULL)
+ deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev);
+ if (deps[i].drvdata != NULL)
+ there++;
+ }
+ return (there == EMAC_DEP_COUNT);
+}
+
+static void emac_put_deps(struct emac_instance *dev)
+{
+ if (dev->mal_dev)
+ of_dev_put(dev->mal_dev);
+ if (dev->zmii_dev)
+ of_dev_put(dev->zmii_dev);
+ if (dev->rgmii_dev)
+ of_dev_put(dev->rgmii_dev);
+ if (dev->mdio_dev)
+ of_dev_put(dev->mdio_dev);
+ if (dev->tah_dev)
+ of_dev_put(dev->tah_dev);
+}
+
+static int __devinit emac_of_bus_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ /* We are only intereted in device addition */
+ if (action == BUS_NOTIFY_BOUND_DRIVER)
+ wake_up_all(&emac_probe_wait);
+ return 0;
+}
+
+static struct notifier_block emac_of_bus_notifier = {
+ .notifier_call = emac_of_bus_notify
+};
+
+static int __devinit emac_wait_deps(struct emac_instance *dev)
+{
+ struct emac_depentry deps[EMAC_DEP_COUNT];
+ int i, err;
+
+ memset(&deps, 0, sizeof(deps));
+
+ deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
+ deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
+ deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
+ if (dev->tah_ph)
+ deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
+ if (dev->mdio_ph)
+ deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
+ if (dev->blist && dev->blist > emac_boot_list)
+ deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
+ bus_register_notifier(&of_platform_bus_type, &emac_of_bus_notifier);
+ wait_event_timeout(emac_probe_wait,
+ emac_check_deps(dev, deps),
+ EMAC_PROBE_DEP_TIMEOUT);
+ bus_unregister_notifier(&of_platform_bus_type, &emac_of_bus_notifier);
+ err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
+ for (i = 0; i < EMAC_DEP_COUNT; i++) {
+ if (deps[i].node)
+ of_node_put(deps[i].node);
+ if (err && deps[i].ofdev)
+ of_dev_put(deps[i].ofdev);
+ }
+ if (err == 0) {
+ dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
+ dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
+ dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
+ dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
+ dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
+ }
+ if (deps[EMAC_DEP_PREV_IDX].ofdev)
+ of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
+ return err;
+}
+
+static int __devinit emac_read_uint_prop(struct device_node *np, const char *name,
+ u32 *val, int fatal)
+{
+ int len;
+ const u32 *prop = of_get_property(np, name, &len);
+ if (prop == NULL || len < sizeof(u32)) {
+ if (fatal)
+ printk(KERN_ERR "%s: missing %s property\n",
+ np->full_name, name);
+ return -ENODEV;
+ }
+ *val = *prop;
+ return 0;
+}
+
+static int __devinit emac_init_phy(struct emac_instance *dev)
+{
+ struct device_node *np = dev->ofdev->node;
+ struct net_device *ndev = dev->ndev;
+ u32 phy_map, adv;
+ int i;
+
+ dev->phy.dev = ndev;
+ dev->phy.mode = dev->phy_mode;
+
+ /* PHY-less configuration.
+ * XXX I probably should move these settings to the dev tree
+ */
+ if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
+ emac_reset(dev);
+
+ /* PHY-less configuration.
+ * XXX I probably should move these settings to the dev tree
+ */
+ dev->phy.address = -1;
+ dev->phy.features = SUPPORTED_100baseT_Full | SUPPORTED_MII;
+ dev->phy.pause = 1;
+
+ return 0;
+ }
+
+ mutex_lock(&emac_phy_map_lock);
+ phy_map = dev->phy_map | busy_phy_map;
+
+ DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
+
+ dev->phy.mdio_read = emac_mdio_read;
+ dev->phy.mdio_write = emac_mdio_write;
+
+ /* Configure EMAC with defaults so we can at least use MDIO
+ * This is needed mostly for 440GX
+ */
+ if (emac_phy_gpcs(dev->phy.mode)) {
+ /* XXX
+ * Make GPCS PHY address equal to EMAC index.
+ * We probably should take into account busy_phy_map
+ * and/or phy_map here.
+ *
+ * Note that the busy_phy_map is currently global
+ * while it should probably be per-ASIC...
+ */
+ dev->phy.address = dev->cell_index;
+ }
+
+ emac_configure(dev);
+
+ if (dev->phy_address != 0xffffffff)
+ phy_map = ~(1 << dev->phy_address);
+
+ for (i = 0; i < 0x20; phy_map >>= 1, ++i)
+ if (!(phy_map & 1)) {
+ int r;
+ busy_phy_map |= 1 << i;
+
+ /* Quick check if there is a PHY at the address */
+ r = emac_mdio_read(dev->ndev, i, MII_BMCR);
+ if (r == 0xffff || r < 0)
+ continue;
+ if (!emac_mii_phy_probe(&dev->phy, i))
+ break;
+ }
+ mutex_unlock(&emac_phy_map_lock);
+ if (i == 0x20) {
+ printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
+ return -ENXIO;
+ }
+
+ /* Init PHY */
+ if (dev->phy.def->ops->init)
+ dev->phy.def->ops->init(&dev->phy);
+
+ /* Disable any PHY features not supported by the platform */
+ dev->phy.def->features &= ~dev->phy_feat_exc;
+
+ /* Setup initial link parameters */
+ if (dev->phy.features & SUPPORTED_Autoneg) {
+ adv = dev->phy.features;
+ if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
+ adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+ /* Restart autonegotiation */
+ dev->phy.def->ops->setup_aneg(&dev->phy, adv);
+ } else {
+ u32 f = dev->phy.def->features;
+ int speed = SPEED_10, fd = DUPLEX_HALF;
+
+ /* Select highest supported speed/duplex */
+ if (f & SUPPORTED_1000baseT_Full) {
+ speed = SPEED_1000;
+ fd = DUPLEX_FULL;
+ } else if (f & SUPPORTED_1000baseT_Half)
+ speed = SPEED_1000;
+ else if (f & SUPPORTED_100baseT_Full) {
+ speed = SPEED_100;
+ fd = DUPLEX_FULL;
+ } else if (f & SUPPORTED_100baseT_Half)
+ speed = SPEED_100;
+ else if (f & SUPPORTED_10baseT_Full)
+ fd = DUPLEX_FULL;
+
+ /* Force link parameters */
+ dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
+ }
+ return 0;
+}
+
+static int __devinit emac_init_config(struct emac_instance *dev)
+{
+ struct device_node *np = dev->ofdev->node;
+ const void *p;
+ unsigned int plen;
+ const char *pm, *phy_modes[] = {
+ [PHY_MODE_NA] = "",
+ [PHY_MODE_MII] = "mii",
+ [PHY_MODE_RMII] = "rmii",
+ [PHY_MODE_SMII] = "smii",
+ [PHY_MODE_RGMII] = "rgmii",
+ [PHY_MODE_TBI] = "tbi",
+ [PHY_MODE_GMII] = "gmii",
+ [PHY_MODE_RTBI] = "rtbi",
+ [PHY_MODE_SGMII] = "sgmii",
+ };
+
+ /* Read config from device-tree */
+ if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
+ dev->max_mtu = 1500;
+ if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
+ dev->rx_fifo_size = 2048;
+ if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
+ dev->tx_fifo_size = 2048;
+ if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
+ dev->rx_fifo_size_gige = dev->rx_fifo_size;
+ if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
+ dev->tx_fifo_size_gige = dev->tx_fifo_size;
+ if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
+ dev->phy_address = 0xffffffff;
+ if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
+ dev->phy_map = 0xffffffff;
+ if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
+ dev->tah_ph = 0;
+ if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
+ dev->tah_ph = 0;
+ if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
+ dev->mdio_ph = 0;
+ if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
+ dev->zmii_ph = 0;;
+ if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
+ dev->zmii_port = 0xffffffff;;
+ if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
+ dev->rgmii_ph = 0;;
+ if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
+ dev->rgmii_port = 0xffffffff;;
+ if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
+ dev->fifo_entry_size = 16;
+ if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
+ dev->mal_burst_size = 256;
+
+ /* PHY mode needs some decoding */
+ dev->phy_mode = PHY_MODE_NA;
+ pm = of_get_property(np, "phy-mode", &plen);
+ if (pm != NULL) {
+ int i;
+ for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
+ if (!strcasecmp(pm, phy_modes[i])) {
+ dev->phy_mode = i;
+ break;
+ }
+ }
+
+ /* Backward compat with non-final DT */
+ if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) {
+ u32 nmode = *(const u32 *)pm;
+ if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII)
+ dev->phy_mode = nmode;
+ }
+
+ /* Check EMAC version */
+ if (of_device_is_compatible(np, "ibm,emac4"))
+ dev->features |= EMAC_FTR_EMAC4;
+ if (of_device_is_compatible(np, "ibm,emac-axon")
+ || of_device_is_compatible(np, "ibm,emac-440epx"))
+ dev->features |= EMAC_FTR_HAS_AXON_STACR
+ | EMAC_FTR_STACR_OC_INVERT;
+ if (of_device_is_compatible(np, "ibm,emac-440spe"))
+ dev->features |= EMAC_FTR_STACR_OC_INVERT;
+
+ /* Fixup some feature bits based on the device tree and verify
+ * we have support for them compiled in
+ */
+ if (dev->tah_ph != 0) {
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+ dev->features |= EMAC_FTR_HAS_TAH;
+#else
+ printk(KERN_ERR "%s: TAH support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ if (dev->zmii_ph != 0) {
+#ifdef CONFIG_IBM_NEW_EMAC_ZMII
+ dev->features |= EMAC_FTR_HAS_ZMII;
+#else
+ printk(KERN_ERR "%s: ZMII support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ if (dev->rgmii_ph != 0) {
+#ifdef CONFIG_IBM_NEW_EMAC_RGMII
+ dev->features |= EMAC_FTR_HAS_RGMII;
+#else
+ printk(KERN_ERR "%s: RGMII support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ /* Read MAC-address */
+ p = of_get_property(np, "local-mac-address", NULL);
+ if (p == NULL) {
+ printk(KERN_ERR "%s: Can't find local-mac-address property\n",
+ np->full_name);
+ return -ENXIO;
+ }
+ memcpy(dev->ndev->dev_addr, p, 6);
+
+ DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
+ DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
+ DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
+ DBG(dev, "max_mtu : %d\n", dev->max_mtu);
+ DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
+
+ return 0;
+}
+
+static int __devinit emac_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct net_device *ndev;
+ struct emac_instance *dev;
+ struct device_node *np = ofdev->node;
+ struct device_node **blist = NULL;
+ int err, i;
+
+ /* Find ourselves in the bootlist if we are there */
+ for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
+ if (emac_boot_list[i] == np)
+ blist = &emac_boot_list[i];
+
+ /* Allocate our net_device structure */
+ err = -ENOMEM;
+ ndev = alloc_etherdev(sizeof(struct emac_instance));
+ if (!ndev) {
+ printk(KERN_ERR "%s: could not allocate ethernet device!\n",
+ np->full_name);
+ goto err_gone;
+ }
+ dev = netdev_priv(ndev);
+ dev->ndev = ndev;
+ dev->ofdev = ofdev;
+ dev->blist = blist;
+ SET_MODULE_OWNER(ndev);
+ SET_NETDEV_DEV(ndev, &ofdev->dev);
+
+ /* Initialize some embedded data structures */
+ mutex_init(&dev->mdio_lock);
+ mutex_init(&dev->link_lock);
+ spin_lock_init(&dev->lock);
+ INIT_WORK(&dev->reset_work, emac_reset_work);
+
+ /* Init various config data based on device-tree */
+ err = emac_init_config(dev);
+ if (err != 0)
+ goto err_free;
+
+ /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
+ dev->emac_irq = irq_of_parse_and_map(np, 0);
+ dev->wol_irq = irq_of_parse_and_map(np, 1);
+ if (dev->emac_irq == NO_IRQ) {
+ printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
+ goto err_free;
+ }
+ ndev->irq = dev->emac_irq;
+
+ /* Map EMAC regs */
+ if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
+ printk(KERN_ERR "%s: Can't get registers address\n",
+ np->full_name);
+ goto err_irq_unmap;
+ }
+ // TODO : request_mem_region
+ dev->emacp = ioremap(dev->rsrc_regs.start, sizeof(struct emac_regs));
+ if (dev->emacp == NULL) {
+ printk(KERN_ERR "%s: Can't map device registers!\n",
+ np->full_name);
+ err = -ENOMEM;
+ goto err_irq_unmap;
+ }
+
+ /* Wait for dependent devices */
+ err = emac_wait_deps(dev);
+ if (err) {
+ printk(KERN_ERR
+ "%s: Timeout waiting for dependent devices\n",
+ np->full_name);
+ /* display more info about what's missing ? */
+ goto err_reg_unmap;
+ }
+ dev->mal = dev_get_drvdata(&dev->mal_dev->dev);
+ if (dev->mdio_dev != NULL)
+ dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev);
+
+ /* Register with MAL */
+ dev->commac.ops = &emac_commac_ops;
+ dev->commac.dev = dev;
+ dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
+ dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
+ err = mal_register_commac(dev->mal, &dev->commac);
+ if (err) {
+ printk(KERN_ERR "%s: failed to register with mal %s!\n",
+ np->full_name, dev->mal_dev->node->full_name);
+ goto err_rel_deps;
+ }
+ dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
+ dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
+
+ /* Get pointers to BD rings */
+ dev->tx_desc =
+ dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
+ dev->rx_desc =
+ dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
+
+ DBG(dev, "tx_desc %p" NL, dev->tx_desc);
+ DBG(dev, "rx_desc %p" NL, dev->rx_desc);
+
+ /* Clean rings */
+ memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
+ memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
+
+ /* Attach to ZMII, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
+ (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
+ goto err_unreg_commac;
+
+ /* Attach to RGMII, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
+ (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
+ goto err_detach_zmii;
+
+ /* Attach to TAH, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
+ (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
+ goto err_detach_rgmii;
+
+ /* Set some link defaults before we can find out real parameters */
+ dev->phy.speed = SPEED_100;
+ dev->phy.duplex = DUPLEX_FULL;
+ dev->phy.autoneg = AUTONEG_DISABLE;
+ dev->phy.pause = dev->phy.asym_pause = 0;
+ dev->stop_timeout = STOP_TIMEOUT_100;
+ INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
+
+ /* Find PHY if any */
+ err = emac_init_phy(dev);
+ if (err != 0)
+ goto err_detach_tah;
+
+ /* Fill in the driver function table */
+ ndev->open = &emac_open;
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+ if (dev->tah_dev) {
+ ndev->hard_start_xmit = &emac_start_xmit_sg;
+ ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
+ } else
+#endif
+ ndev->hard_start_xmit = &emac_start_xmit;
+ ndev->tx_timeout = &emac_tx_timeout;
+ ndev->watchdog_timeo = 5 * HZ;
+ ndev->stop = &emac_close;
+ ndev->get_stats = &emac_stats;
+ ndev->set_multicast_list = &emac_set_multicast_list;
+ ndev->do_ioctl = &emac_ioctl;
+ if (emac_phy_supports_gige(dev->phy_mode)) {
+ ndev->change_mtu = &emac_change_mtu;
+ dev->commac.ops = &emac_commac_sg_ops;
+ }
+ SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
+
+ netif_carrier_off(ndev);
+ netif_stop_queue(ndev);
+
+ err = register_netdev(ndev);
+ if (err) {
+ printk(KERN_ERR "%s: failed to register net device (%d)!\n",
+ np->full_name, err);
+ goto err_detach_tah;
+ }
+
+ /* Set our drvdata last as we don't want them visible until we are
+ * fully initialized
+ */
+ wmb();
+ dev_set_drvdata(&ofdev->dev, dev);
+
+ /* There's a new kid in town ! Let's tell everybody */
+ wake_up_all(&emac_probe_wait);
+
+
+ printk(KERN_INFO
+ "%s: EMAC-%d %s, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
+ ndev->name, dev->cell_index, np->full_name,
+ ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
+ ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
+
+ if (dev->phy.address >= 0)
+ printk("%s: found %s PHY (0x%02x)\n", ndev->name,
+ dev->phy.def->name, dev->phy.address);
+
+ emac_dbg_register(dev);
+
+ /* Life is good */
+ return 0;
+
+ /* I have a bad feeling about this ... */
+
+ err_detach_tah:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_detach(dev->tah_dev, dev->tah_port);
+ err_detach_rgmii:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
+ err_detach_zmii:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_detach(dev->zmii_dev, dev->zmii_port);
+ err_unreg_commac:
+ mal_unregister_commac(dev->mal, &dev->commac);
+ err_rel_deps:
+ emac_put_deps(dev);
+ err_reg_unmap:
+ iounmap(dev->emacp);
+ err_irq_unmap:
+ if (dev->wol_irq != NO_IRQ)
+ irq_dispose_mapping(dev->wol_irq);
+ if (dev->emac_irq != NO_IRQ)
+ irq_dispose_mapping(dev->emac_irq);
+ err_free:
+ kfree(ndev);
+ err_gone:
+ /* if we were on the bootlist, remove us as we won't show up and
+ * wake up all waiters to notify them in case they were waiting
+ * on us
+ */
+ if (blist) {
+ *blist = NULL;
+ wake_up_all(&emac_probe_wait);
+ }
+ return err;
+}
+
+static int __devexit emac_remove(struct of_device *ofdev)
+{
+ struct emac_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ DBG(dev, "remove" NL);
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ unregister_netdev(dev->ndev);
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_detach(dev->tah_dev, dev->tah_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_detach(dev->zmii_dev, dev->zmii_port);
+
+ mal_unregister_commac(dev->mal, &dev->commac);
+ emac_put_deps(dev);
+
+ emac_dbg_unregister(dev);
+ iounmap(dev->emacp);
+
+ if (dev->wol_irq != NO_IRQ)
+ irq_dispose_mapping(dev->wol_irq);
+ if (dev->emac_irq != NO_IRQ)
+ irq_dispose_mapping(dev->emac_irq);
+
+ kfree(dev->ndev);
+
+ return 0;
+}
+
+/* XXX Features in here should be replaced by properties... */
+static struct of_device_id emac_match[] =
+{
+ {
+ .type = "network",
+ .compatible = "ibm,emac",
+ },
+ {
+ .type = "network",
+ .compatible = "ibm,emac4",
+ },
+ {},
+};
+
+static struct of_platform_driver emac_driver = {
+ .name = "emac",
+ .match_table = emac_match,
+
+ .probe = emac_probe,
+ .remove = emac_remove,
+};
+
+static void __init emac_make_bootlist(void)
+{
+ struct device_node *np = NULL;
+ int j, max, i = 0, k;
+ int cell_indices[EMAC_BOOT_LIST_SIZE];
+
+ /* Collect EMACs */
+ while((np = of_find_all_nodes(np)) != NULL) {
+ const u32 *idx;
+
+ if (of_match_node(emac_match, np) == NULL)
+ continue;
+ if (of_get_property(np, "unused", NULL))
+ continue;
+ idx = of_get_property(np, "cell-index", NULL);
+ if (idx == NULL)
+ continue;
+ cell_indices[i] = *idx;
+ emac_boot_list[i++] = of_node_get(np);
+ if (i >= EMAC_BOOT_LIST_SIZE) {
+ of_node_put(np);
+ break;
+ }
+ }
+ max = i;
+
+ /* Bubble sort them (doh, what a creative algorithm :-) */
+ for (i = 0; max > 1 && (i < (max - 1)); i++)
+ for (j = i; j < max; j++) {
+ if (cell_indices[i] > cell_indices[j]) {
+ np = emac_boot_list[i];
+ emac_boot_list[i] = emac_boot_list[j];
+ emac_boot_list[j] = np;
+ k = cell_indices[i];
+ cell_indices[i] = cell_indices[j];
+ cell_indices[j] = k;
+ }
+ }
+}
+
+static int __init emac_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
+
+ /* Init debug stuff */
+ emac_init_debug();
+
+ /* Build EMAC boot list */
+ emac_make_bootlist();
+
+ /* Init submodules */
+ rc = mal_init();
+ if (rc)
+ goto err;
+ rc = zmii_init();
+ if (rc)
+ goto err_mal;
+ rc = rgmii_init();
+ if (rc)
+ goto err_zmii;
+ rc = tah_init();
+ if (rc)
+ goto err_rgmii;
+ rc = of_register_platform_driver(&emac_driver);
+ if (rc)
+ goto err_tah;
+
+ return 0;
+
+ err_tah:
+ tah_exit();
+ err_rgmii:
+ rgmii_exit();
+ err_zmii:
+ zmii_exit();
+ err_mal:
+ mal_exit();
+ err:
+ return rc;
+}
+
+static void __exit emac_exit(void)
+{
+ int i;
+
+ of_unregister_platform_driver(&emac_driver);
+
+ tah_exit();
+ rgmii_exit();
+ zmii_exit();
+ mal_exit();
+ emac_fini_debug();
+
+ /* Destroy EMAC boot list */
+ for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
+ if (emac_boot_list[i])
+ of_node_put(emac_boot_list[i]);
+}
+
+module_init(emac_init);
+module_exit(emac_exit);
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/core.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Armin Kuster <akuster@mvista.com>
+ * Johnnie Peters <jpeters@mvista.com>
+ * Copyright 2000, 2001 MontaVista Softare Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __IBM_NEWEMAC_CORE_H
+#define __IBM_NEWEMAC_CORE_H
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/dma-mapping.h>
+#include <linux/spinlock.h>
+
+#include <asm/of_platform.h>
+#include <asm/io.h>
+#include <asm/dcr.h>
+
+#include "emac.h"
+#include "phy.h"
+#include "zmii.h"
+#include "rgmii.h"
+#include "mal.h"
+#include "tah.h"
+#include "debug.h"
+
+#define NUM_TX_BUFF CONFIG_IBM_NEW_EMAC_TXB
+#define NUM_RX_BUFF CONFIG_IBM_NEW_EMAC_RXB
+
+/* Simple sanity check */
+#if NUM_TX_BUFF > 256 || NUM_RX_BUFF > 256
+#error Invalid number of buffer descriptors (greater than 256)
+#endif
+
+#define EMAC_MIN_MTU 46
+
+/* Maximum L2 header length (VLAN tagged, no FCS) */
+#define EMAC_MTU_OVERHEAD (6 * 2 + 2 + 4)
+
+/* RX BD size for the given MTU */
+static inline int emac_rx_size(int mtu)
+{
+ if (mtu > ETH_DATA_LEN)
+ return MAL_MAX_RX_SIZE;
+ else
+ return mal_rx_size(ETH_DATA_LEN + EMAC_MTU_OVERHEAD);
+}
+
+#define EMAC_DMA_ALIGN(x) ALIGN((x), dma_get_cache_alignment())
+
+#define EMAC_RX_SKB_HEADROOM \
+ EMAC_DMA_ALIGN(CONFIG_IBM_NEW_EMAC_RX_SKB_HEADROOM)
+
+/* Size of RX skb for the given MTU */
+static inline int emac_rx_skb_size(int mtu)
+{
+ int size = max(mtu + EMAC_MTU_OVERHEAD, emac_rx_size(mtu));
+ return EMAC_DMA_ALIGN(size + 2) + EMAC_RX_SKB_HEADROOM;
+}
+
+/* RX DMA sync size */
+static inline int emac_rx_sync_size(int mtu)
+{
+ return EMAC_DMA_ALIGN(emac_rx_size(mtu) + 2);
+}
+
+/* Driver statistcs is split into two parts to make it more cache friendly:
+ * - normal statistics (packet count, etc)
+ * - error statistics
+ *
+ * When statistics is requested by ethtool, these parts are concatenated,
+ * normal one goes first.
+ *
+ * Please, keep these structures in sync with emac_stats_keys.
+ */
+
+/* Normal TX/RX Statistics */
+struct emac_stats {
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 rx_packets_csum;
+ u64 tx_packets_csum;
+};
+
+/* Error statistics */
+struct emac_error_stats {
+ u64 tx_undo;
+
+ /* Software RX Errors */
+ u64 rx_dropped_stack;
+ u64 rx_dropped_oom;
+ u64 rx_dropped_error;
+ u64 rx_dropped_resize;
+ u64 rx_dropped_mtu;
+ u64 rx_stopped;
+ /* BD reported RX errors */
+ u64 rx_bd_errors;
+ u64 rx_bd_overrun;
+ u64 rx_bd_bad_packet;
+ u64 rx_bd_runt_packet;
+ u64 rx_bd_short_event;
+ u64 rx_bd_alignment_error;
+ u64 rx_bd_bad_fcs;
+ u64 rx_bd_packet_too_long;
+ u64 rx_bd_out_of_range;
+ u64 rx_bd_in_range;
+ /* EMAC IRQ reported RX errors */
+ u64 rx_parity;
+ u64 rx_fifo_overrun;
+ u64 rx_overrun;
+ u64 rx_bad_packet;
+ u64 rx_runt_packet;
+ u64 rx_short_event;
+ u64 rx_alignment_error;
+ u64 rx_bad_fcs;
+ u64 rx_packet_too_long;
+ u64 rx_out_of_range;
+ u64 rx_in_range;
+
+ /* Software TX Errors */
+ u64 tx_dropped;
+ /* BD reported TX errors */
+ u64 tx_bd_errors;
+ u64 tx_bd_bad_fcs;
+ u64 tx_bd_carrier_loss;
+ u64 tx_bd_excessive_deferral;
+ u64 tx_bd_excessive_collisions;
+ u64 tx_bd_late_collision;
+ u64 tx_bd_multple_collisions;
+ u64 tx_bd_single_collision;
+ u64 tx_bd_underrun;
+ u64 tx_bd_sqe;
+ /* EMAC IRQ reported TX errors */
+ u64 tx_parity;
+ u64 tx_underrun;
+ u64 tx_sqe;
+ u64 tx_errors;
+};
+
+#define EMAC_ETHTOOL_STATS_COUNT ((sizeof(struct emac_stats) + \
+ sizeof(struct emac_error_stats)) \
+ / sizeof(u64))
+
+struct emac_instance {
+ struct net_device *ndev;
+ struct resource rsrc_regs;
+ struct emac_regs __iomem *emacp;
+ struct of_device *ofdev;
+ struct device_node **blist; /* bootlist entry */
+
+ /* MAL linkage */
+ u32 mal_ph;
+ struct of_device *mal_dev;
+ u32 mal_rx_chan;
+ u32 mal_tx_chan;
+ struct mal_instance *mal;
+ struct mal_commac commac;
+
+ /* PHY infos */
+ u32 phy_mode;
+ u32 phy_map;
+ u32 phy_address;
+ u32 phy_feat_exc;
+ struct mii_phy phy;
+ struct mutex link_lock;
+ struct delayed_work link_work;
+ int link_polling;
+
+ /* Shared MDIO if any */
+ u32 mdio_ph;
+ struct of_device *mdio_dev;
+ struct emac_instance *mdio_instance;
+ struct mutex mdio_lock;
+
+ /* ZMII infos if any */
+ u32 zmii_ph;
+ u32 zmii_port;
+ struct of_device *zmii_dev;
+
+ /* RGMII infos if any */
+ u32 rgmii_ph;
+ u32 rgmii_port;
+ struct of_device *rgmii_dev;
+
+ /* TAH infos if any */
+ u32 tah_ph;
+ u32 tah_port;
+ struct of_device *tah_dev;
+
+ /* IRQs */
+ int wol_irq;
+ int emac_irq;
+
+ /* OPB bus frequency in Mhz */
+ u32 opb_bus_freq;
+
+ /* Cell index within an ASIC (for clk mgmnt) */
+ u32 cell_index;
+
+ /* Max supported MTU */
+ u32 max_mtu;
+
+ /* Feature bits (from probe table) */
+ unsigned int features;
+
+ /* Tx and Rx fifo sizes & other infos in bytes */
+ u32 tx_fifo_size;
+ u32 tx_fifo_size_gige;
+ u32 rx_fifo_size;
+ u32 rx_fifo_size_gige;
+ u32 fifo_entry_size;
+ u32 mal_burst_size; /* move to MAL ? */
+
+ /* Descriptor management
+ */
+ struct mal_descriptor *tx_desc;
+ int tx_cnt;
+ int tx_slot;
+ int ack_slot;
+
+ struct mal_descriptor *rx_desc;
+ int rx_slot;
+ struct sk_buff *rx_sg_skb; /* 1 */
+ int rx_skb_size;
+ int rx_sync_size;
+
+ struct sk_buff *tx_skb[NUM_TX_BUFF];
+ struct sk_buff *rx_skb[NUM_RX_BUFF];
+
+ /* Stats
+ */
+ struct emac_error_stats estats;
+ struct net_device_stats nstats;
+ struct emac_stats stats;
+
+ /* Misc
+ */
+ int reset_failed;
+ int stop_timeout; /* in us */
+ int no_mcast;
+ int mcast_pending;
+ struct work_struct reset_work;
+ spinlock_t lock;
+};
+
+/*
+ * Features of various EMAC implementations
+ */
+
+/*
+ * No flow control on 40x according to the original driver
+ */
+#define EMAC_FTR_NO_FLOW_CONTROL_40x 0x00000001
+/*
+ * Cell is an EMAC4
+ */
+#define EMAC_FTR_EMAC4 0x00000002
+/*
+ * For the 440SPe, AMCC inexplicably changed the polarity of
+ * the "operation complete" bit in the MII control register.
+ */
+#define EMAC_FTR_STACR_OC_INVERT 0x00000004
+/*
+ * Set if we have a TAH.
+ */
+#define EMAC_FTR_HAS_TAH 0x00000008
+/*
+ * Set if we have a ZMII.
+ */
+#define EMAC_FTR_HAS_ZMII 0x00000010
+/*
+ * Set if we have a RGMII.
+ */
+#define EMAC_FTR_HAS_RGMII 0x00000020
+/*
+ * Set if we have axon-type STACR
+ */
+#define EMAC_FTR_HAS_AXON_STACR 0x00000040
+
+
+/* Right now, we don't quite handle the always/possible masks on the
+ * most optimal way as we don't have a way to say something like
+ * always EMAC4. Patches welcome.
+ */
+enum {
+ EMAC_FTRS_ALWAYS = 0,
+
+ EMAC_FTRS_POSSIBLE =
+#ifdef CONFIG_IBM_NEW_EMAC_EMAC4
+ EMAC_FTR_EMAC4 | EMAC_FTR_HAS_AXON_STACR |
+ EMAC_FTR_STACR_OC_INVERT |
+#endif
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+ EMAC_FTR_HAS_TAH |
+#endif
+#ifdef CONFIG_IBM_NEW_EMAC_ZMII
+ EMAC_FTR_HAS_ZMII |
+#endif
+#ifdef CONFIG_IBM_NEW_EMAC_RGMII
+ EMAC_FTR_HAS_RGMII |
+#endif
+ 0,
+};
+
+static inline int emac_has_feature(struct emac_instance *dev,
+ unsigned long feature)
+{
+ return (EMAC_FTRS_ALWAYS & feature) ||
+ (EMAC_FTRS_POSSIBLE & dev->features & feature);
+}
+
+
+/* Ethtool get_regs complex data.
+ * We want to get not just EMAC registers, but also MAL, ZMII, RGMII, TAH
+ * when available.
+ *
+ * Returned BLOB consists of the ibm_emac_ethtool_regs_hdr,
+ * MAL registers, EMAC registers and optional ZMII, RGMII, TAH registers.
+ * Each register component is preceded with emac_ethtool_regs_subhdr.
+ * Order of the optional headers follows their relative bit posititions
+ * in emac_ethtool_regs_hdr.components
+ */
+#define EMAC_ETHTOOL_REGS_ZMII 0x00000001
+#define EMAC_ETHTOOL_REGS_RGMII 0x00000002
+#define EMAC_ETHTOOL_REGS_TAH 0x00000004
+
+struct emac_ethtool_regs_hdr {
+ u32 components;
+};
+
+struct emac_ethtool_regs_subhdr {
+ u32 version;
+ u32 index;
+};
+
+#endif /* __IBM_NEWEMAC_CORE_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/debug.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/sysrq.h>
+#include <asm/io.h>
+
+#include "core.h"
+
+static spinlock_t emac_dbg_lock = SPIN_LOCK_UNLOCKED;
+
+static void emac_desc_dump(struct emac_instance *p)
+{
+ int i;
+ printk("** EMAC %s TX BDs **\n"
+ " tx_cnt = %d tx_slot = %d ack_slot = %d\n",
+ p->ofdev->node->full_name,
+ p->tx_cnt, p->tx_slot, p->ack_slot);
+ for (i = 0; i < NUM_TX_BUFF / 2; ++i)
+ printk
+ ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
+ i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
+ p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
+ NUM_TX_BUFF / 2 + i,
+ p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
+ p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
+ p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
+ p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
+
+ printk("** EMAC %s RX BDs **\n"
+ " rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n"
+ " rx_sg_skb = 0x%p\n",
+ p->ofdev->node->full_name,
+ p->rx_slot, p->commac.flags, p->rx_skb_size,
+ p->rx_sync_size, p->rx_sg_skb);
+ for (i = 0; i < NUM_RX_BUFF / 2; ++i)
+ printk
+ ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
+ i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
+ p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
+ NUM_RX_BUFF / 2 + i,
+ p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
+ p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
+ p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
+ p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
+}
+
+static void emac_mac_dump(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+
+ printk("** EMAC %s registers **\n"
+ "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
+ "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
+ "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n"
+ "IAHT: 0x%04x 0x%04x 0x%04x 0x%04x "
+ "GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n"
+ "LSA = %04x%08x IPGVR = 0x%04x\n"
+ "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
+ "OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\n",
+ dev->ofdev->node->full_name, in_be32(&p->mr0), in_be32(&p->mr1),
+ in_be32(&p->tmr0), in_be32(&p->tmr1),
+ in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
+ in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
+ in_be32(&p->vtci),
+ in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3),
+ in_be32(&p->iaht4),
+ in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3),
+ in_be32(&p->gaht4),
+ in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
+ in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
+ in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr)
+ );
+
+ emac_desc_dump(dev);
+}
+
+static void emac_mal_dump(struct mal_instance *mal)
+{
+ int i;
+
+ printk("** MAL %s Registers **\n"
+ "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
+ "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
+ "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
+ mal->ofdev->node->full_name,
+ get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
+ get_mal_dcrn(mal, MAL_IER),
+ get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
+ get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
+ get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
+ get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
+ );
+
+ printk("TX|");
+ for (i = 0; i < mal->num_tx_chans; ++i) {
+ if (i && !(i % 4))
+ printk("\n ");
+ printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
+ }
+ printk("\nRX|");
+ for (i = 0; i < mal->num_rx_chans; ++i) {
+ if (i && !(i % 4))
+ printk("\n ");
+ printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
+ }
+ printk("\n ");
+ for (i = 0; i < mal->num_rx_chans; ++i) {
+ u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
+ if (i && !(i % 3))
+ printk("\n ");
+ printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
+ }
+ printk("\n");
+}
+
+static struct emac_instance *__emacs[4];
+static struct mal_instance *__mals[1];
+
+void emac_dbg_register(struct emac_instance *dev)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&emac_dbg_lock, flags);
+ for (i = 0; i < ARRAY_SIZE(__emacs); i++)
+ if (__emacs[i] == NULL) {
+ __emacs[i] = dev;
+ break;
+ }
+ spin_unlock_irqrestore(&emac_dbg_lock, flags);
+}
+
+void emac_dbg_unregister(struct emac_instance *dev)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&emac_dbg_lock, flags);
+ for (i = 0; i < ARRAY_SIZE(__emacs); i++)
+ if (__emacs[i] == dev) {
+ __emacs[i] = NULL;
+ break;
+ }
+ spin_unlock_irqrestore(&emac_dbg_lock, flags);
+}
+
+void mal_dbg_register(struct mal_instance *mal)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&emac_dbg_lock, flags);
+ for (i = 0; i < ARRAY_SIZE(__mals); i++)
+ if (__mals[i] == NULL) {
+ __mals[i] = mal;
+ break;
+ }
+ spin_unlock_irqrestore(&emac_dbg_lock, flags);
+}
+
+void mal_dbg_unregister(struct mal_instance *mal)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&emac_dbg_lock, flags);
+ for (i = 0; i < ARRAY_SIZE(__mals); i++)
+ if (__mals[i] == mal) {
+ __mals[i] = NULL;
+ break;
+ }
+ spin_unlock_irqrestore(&emac_dbg_lock, flags);
+}
+
+void emac_dbg_dump_all(void)
+{
+ unsigned int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&emac_dbg_lock, flags);
+
+ for (i = 0; i < ARRAY_SIZE(__mals); ++i)
+ if (__mals[i])
+ emac_mal_dump(__mals[i]);
+
+ for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
+ if (__emacs[i])
+ emac_mac_dump(__emacs[i]);
+
+ spin_unlock_irqrestore(&emac_dbg_lock, flags);
+}
+
+#if defined(CONFIG_MAGIC_SYSRQ)
+static void emac_sysrq_handler(int key, struct tty_struct *tty)
+{
+ emac_dbg_dump_all();
+}
+
+static struct sysrq_key_op emac_sysrq_op = {
+ .handler = emac_sysrq_handler,
+ .help_msg = "emaC",
+ .action_msg = "Show EMAC(s) status",
+};
+
+int __init emac_init_debug(void)
+{
+ return register_sysrq_key('c', &emac_sysrq_op);
+}
+
+void __exit emac_fini_debug(void)
+{
+ unregister_sysrq_key('c', &emac_sysrq_op);
+}
+
+#else
+int __init emac_init_debug(void)
+{
+ return 0;
+}
+void __exit emac_fini_debug(void)
+{
+}
+#endif /* CONFIG_MAGIC_SYSRQ */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/debug.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __IBM_NEWEMAC_DEBUG_H
+#define __IBM_NEWEMAC_DEBUG_H
+
+#include <linux/init.h>
+
+#include "core.h"
+
+#if defined(CONFIG_IBM_NEW_EMAC_DEBUG)
+
+struct emac_instance;
+struct mal_instance;
+
+extern void emac_dbg_register(struct emac_instance *dev);
+extern void emac_dbg_unregister(struct emac_instance *dev);
+extern void mal_dbg_register(struct mal_instance *mal);
+extern void mal_dbg_unregister(struct mal_instance *mal);
+extern int emac_init_debug(void) __init;
+extern void emac_fini_debug(void) __exit;
+extern void emac_dbg_dump_all(void);
+
+# define DBG_LEVEL 1
+
+#else
+
+# define emac_dbg_register(x) do { } while(0)
+# define emac_dbg_unregister(x) do { } while(0)
+# define mal_dbg_register(x) do { } while(0)
+# define mal_dbg_unregister(x) do { } while(0)
+# define emac_init_debug() do { } while(0)
+# define emac_fini_debug() do { } while(0)
+# define emac_dbg_dump_all() do { } while(0)
+
+# define DBG_LEVEL 0
+
+#endif
+
+#define EMAC_DBG(dev, name, fmt, arg...) \
+ printk(KERN_DEBUG #name "%s: " fmt, dev->ofdev->node->full_name, ## arg)
+
+#if DBG_LEVEL > 0
+# define DBG(d,f,x...) EMAC_DBG(d, emac, f, ##x)
+# define MAL_DBG(d,f,x...) EMAC_DBG(d, mal, f, ##x)
+# define ZMII_DBG(d,f,x...) EMAC_DBG(d, zmii, f, ##x)
+# define RGMII_DBG(d,f,x...) EMAC_DBG(d, rgmii, f, ##x)
+# define NL "\n"
+#else
+# define DBG(f,x...) ((void)0)
+# define MAL_DBG(d,f,x...) ((void)0)
+# define ZMII_DBG(d,f,x...) ((void)0)
+# define RGMII_DBG(d,f,x...) ((void)0)
+#endif
+#if DBG_LEVEL > 1
+# define DBG2(d,f,x...) DBG(d,f, ##x)
+# define MAL_DBG2(d,f,x...) MAL_DBG(d,f, ##x)
+# define ZMII_DBG2(d,f,x...) ZMII_DBG(d,f, ##x)
+# define RGMII_DBG2(d,f,x...) RGMII_DBG(d,f, ##x)
+#else
+# define DBG2(f,x...) ((void)0)
+# define MAL_DBG2(d,f,x...) ((void)0)
+# define ZMII_DBG2(d,f,x...) ((void)0)
+# define RGMII_DBG2(d,f,x...) ((void)0)
+#endif
+
+#endif /* __IBM_NEWEMAC_DEBUG_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/emac.h
+ *
+ * Register definitions for PowerPC 4xx on-chip ethernet contoller
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Matt Porter <mporter@kernel.crashing.org>
+ * Armin Kuster <akuster@mvista.com>
+ * Copyright 2002-2004 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __IBM_NEWEMAC_H
+#define __IBM_NEWEMAC_H
+
+#include <linux/types.h>
+
+/* EMAC registers Write Access rules */
+struct emac_regs {
+ u32 mr0; /* special */
+ u32 mr1; /* Reset */
+ u32 tmr0; /* special */
+ u32 tmr1; /* special */
+ u32 rmr; /* Reset */
+ u32 isr; /* Always */
+ u32 iser; /* Reset */
+ u32 iahr; /* Reset, R, T */
+ u32 ialr; /* Reset, R, T */
+ u32 vtpid; /* Reset, R, T */
+ u32 vtci; /* Reset, R, T */
+ u32 ptr; /* Reset, T */
+ u32 iaht1; /* Reset, R */
+ u32 iaht2; /* Reset, R */
+ u32 iaht3; /* Reset, R */
+ u32 iaht4; /* Reset, R */
+ u32 gaht1; /* Reset, R */
+ u32 gaht2; /* Reset, R */
+ u32 gaht3; /* Reset, R */
+ u32 gaht4; /* Reset, R */
+ u32 lsah;
+ u32 lsal;
+ u32 ipgvr; /* Reset, T */
+ u32 stacr; /* special */
+ u32 trtr; /* special */
+ u32 rwmr; /* Reset */
+ u32 octx;
+ u32 ocrx;
+ u32 ipcr;
+};
+
+/*
+ * PHY mode settings (EMAC <-> ZMII/RGMII bridge <-> PHY)
+ */
+#define PHY_MODE_NA 0
+#define PHY_MODE_MII 1
+#define PHY_MODE_RMII 2
+#define PHY_MODE_SMII 3
+#define PHY_MODE_RGMII 4
+#define PHY_MODE_TBI 5
+#define PHY_MODE_GMII 6
+#define PHY_MODE_RTBI 7
+#define PHY_MODE_SGMII 8
+
+
+#define EMAC_ETHTOOL_REGS_VER 0
+#define EMAC_ETHTOOL_REGS_SIZE (sizeof(struct emac_regs) - sizeof(u32))
+#define EMAC4_ETHTOOL_REGS_VER 1
+#define EMAC4_ETHTOOL_REGS_SIZE sizeof(struct emac_regs)
+
+/* EMACx_MR0 */
+#define EMAC_MR0_RXI 0x80000000
+#define EMAC_MR0_TXI 0x40000000
+#define EMAC_MR0_SRST 0x20000000
+#define EMAC_MR0_TXE 0x10000000
+#define EMAC_MR0_RXE 0x08000000
+#define EMAC_MR0_WKE 0x04000000
+
+/* EMACx_MR1 */
+#define EMAC_MR1_FDE 0x80000000
+#define EMAC_MR1_ILE 0x40000000
+#define EMAC_MR1_VLE 0x20000000
+#define EMAC_MR1_EIFC 0x10000000
+#define EMAC_MR1_APP 0x08000000
+#define EMAC_MR1_IST 0x01000000
+
+#define EMAC_MR1_MF_MASK 0x00c00000
+#define EMAC_MR1_MF_10 0x00000000
+#define EMAC_MR1_MF_100 0x00400000
+#define EMAC_MR1_MF_1000 0x00800000
+#define EMAC_MR1_MF_1000GPCS 0x00c00000
+#define EMAC_MR1_MF_IPPA(id) (((id) & 0x1f) << 6)
+
+#define EMAC_MR1_RFS_4K 0x00300000
+#define EMAC_MR1_RFS_16K 0x00000000
+#define EMAC_MR1_TFS_2K 0x00080000
+#define EMAC_MR1_TR0_MULT 0x00008000
+#define EMAC_MR1_JPSM 0x00000000
+#define EMAC_MR1_MWSW_001 0x00000000
+#define EMAC_MR1_BASE(opb) (EMAC_MR1_TFS_2K | EMAC_MR1_TR0_MULT)
+
+
+#define EMAC4_MR1_RFS_2K 0x00100000
+#define EMAC4_MR1_RFS_4K 0x00180000
+#define EMAC4_MR1_RFS_16K 0x00280000
+#define EMAC4_MR1_TFS_2K 0x00020000
+#define EMAC4_MR1_TFS_4K 0x00030000
+#define EMAC4_MR1_TR 0x00008000
+#define EMAC4_MR1_MWSW_001 0x00001000
+#define EMAC4_MR1_JPSM 0x00000800
+#define EMAC4_MR1_OBCI_MASK 0x00000038
+#define EMAC4_MR1_OBCI_50 0x00000000
+#define EMAC4_MR1_OBCI_66 0x00000008
+#define EMAC4_MR1_OBCI_83 0x00000010
+#define EMAC4_MR1_OBCI_100 0x00000018
+#define EMAC4_MR1_OBCI_100P 0x00000020
+#define EMAC4_MR1_OBCI(freq) ((freq) <= 50 ? EMAC4_MR1_OBCI_50 : \
+ (freq) <= 66 ? EMAC4_MR1_OBCI_66 : \
+ (freq) <= 83 ? EMAC4_MR1_OBCI_83 : \
+ (freq) <= 100 ? EMAC4_MR1_OBCI_100 : \
+ EMAC4_MR1_OBCI_100P)
+
+/* EMACx_TMR0 */
+#define EMAC_TMR0_GNP 0x80000000
+#define EMAC_TMR0_DEFAULT 0x00000000
+#define EMAC4_TMR0_TFAE_2_32 0x00000001
+#define EMAC4_TMR0_TFAE_4_64 0x00000002
+#define EMAC4_TMR0_TFAE_8_128 0x00000003
+#define EMAC4_TMR0_TFAE_16_256 0x00000004
+#define EMAC4_TMR0_TFAE_32_512 0x00000005
+#define EMAC4_TMR0_TFAE_64_1024 0x00000006
+#define EMAC4_TMR0_TFAE_128_2048 0x00000007
+#define EMAC4_TMR0_DEFAULT EMAC4_TMR0_TFAE_2_32
+#define EMAC_TMR0_XMIT (EMAC_TMR0_GNP | EMAC_TMR0_DEFAULT)
+#define EMAC4_TMR0_XMIT (EMAC_TMR0_GNP | EMAC4_TMR0_DEFAULT)
+
+/* EMACx_TMR1 */
+
+#define EMAC_TMR1(l,h) (((l) << 27) | (((h) & 0xff) << 16))
+#define EMAC4_TMR1(l,h) (((l) << 27) | (((h) & 0x3ff) << 14))
+
+/* EMACx_RMR */
+#define EMAC_RMR_SP 0x80000000
+#define EMAC_RMR_SFCS 0x40000000
+#define EMAC_RMR_RRP 0x20000000
+#define EMAC_RMR_RFP 0x10000000
+#define EMAC_RMR_ROP 0x08000000
+#define EMAC_RMR_RPIR 0x04000000
+#define EMAC_RMR_PPP 0x02000000
+#define EMAC_RMR_PME 0x01000000
+#define EMAC_RMR_PMME 0x00800000
+#define EMAC_RMR_IAE 0x00400000
+#define EMAC_RMR_MIAE 0x00200000
+#define EMAC_RMR_BAE 0x00100000
+#define EMAC_RMR_MAE 0x00080000
+#define EMAC_RMR_BASE 0x00000000
+#define EMAC4_RMR_RFAF_2_32 0x00000001
+#define EMAC4_RMR_RFAF_4_64 0x00000002
+#define EMAC4_RMR_RFAF_8_128 0x00000003
+#define EMAC4_RMR_RFAF_16_256 0x00000004
+#define EMAC4_RMR_RFAF_32_512 0x00000005
+#define EMAC4_RMR_RFAF_64_1024 0x00000006
+#define EMAC4_RMR_RFAF_128_2048 0x00000007
+#define EMAC4_RMR_BASE EMAC4_RMR_RFAF_128_2048
+
+/* EMACx_ISR & EMACx_ISER */
+#define EMAC4_ISR_TXPE 0x20000000
+#define EMAC4_ISR_RXPE 0x10000000
+#define EMAC4_ISR_TXUE 0x08000000
+#define EMAC4_ISR_RXOE 0x04000000
+#define EMAC_ISR_OVR 0x02000000
+#define EMAC_ISR_PP 0x01000000
+#define EMAC_ISR_BP 0x00800000
+#define EMAC_ISR_RP 0x00400000
+#define EMAC_ISR_SE 0x00200000
+#define EMAC_ISR_ALE 0x00100000
+#define EMAC_ISR_BFCS 0x00080000
+#define EMAC_ISR_PTLE 0x00040000
+#define EMAC_ISR_ORE 0x00020000
+#define EMAC_ISR_IRE 0x00010000
+#define EMAC_ISR_SQE 0x00000080
+#define EMAC_ISR_TE 0x00000040
+#define EMAC_ISR_MOS 0x00000002
+#define EMAC_ISR_MOF 0x00000001
+
+/* EMACx_STACR */
+#define EMAC_STACR_PHYD_MASK 0xffff
+#define EMAC_STACR_PHYD_SHIFT 16
+#define EMAC_STACR_OC 0x00008000
+#define EMAC_STACR_PHYE 0x00004000
+#define EMAC_STACR_STAC_MASK 0x00003000
+#define EMAC_STACR_STAC_READ 0x00001000
+#define EMAC_STACR_STAC_WRITE 0x00002000
+#define EMAC_STACR_OPBC_MASK 0x00000C00
+#define EMAC_STACR_OPBC_50 0x00000000
+#define EMAC_STACR_OPBC_66 0x00000400
+#define EMAC_STACR_OPBC_83 0x00000800
+#define EMAC_STACR_OPBC_100 0x00000C00
+#define EMAC_STACR_OPBC(freq) ((freq) <= 50 ? EMAC_STACR_OPBC_50 : \
+ (freq) <= 66 ? EMAC_STACR_OPBC_66 : \
+ (freq) <= 83 ? EMAC_STACR_OPBC_83 : EMAC_STACR_OPBC_100)
+#define EMAC_STACR_BASE(opb) EMAC_STACR_OPBC(opb)
+#define EMAC4_STACR_BASE(opb) 0x00000000
+#define EMAC_STACR_PCDA_MASK 0x1f
+#define EMAC_STACR_PCDA_SHIFT 5
+#define EMAC_STACR_PRA_MASK 0x1f
+#define EMACX_STACR_STAC_MASK 0x00003800
+#define EMACX_STACR_STAC_READ 0x00001000
+#define EMACX_STACR_STAC_WRITE 0x00000800
+#define EMACX_STACR_STAC_IND_ADDR 0x00002000
+#define EMACX_STACR_STAC_IND_READ 0x00003800
+#define EMACX_STACR_STAC_IND_READINC 0x00003000
+#define EMACX_STACR_STAC_IND_WRITE 0x00002800
+
+
+/* EMACx_TRTR */
+#define EMAC_TRTR_SHIFT_EMAC4 27
+#define EMAC_TRTR_SHIFT 24
+
+/* EMAC specific TX descriptor control fields (write access) */
+#define EMAC_TX_CTRL_GFCS 0x0200
+#define EMAC_TX_CTRL_GP 0x0100
+#define EMAC_TX_CTRL_ISA 0x0080
+#define EMAC_TX_CTRL_RSA 0x0040
+#define EMAC_TX_CTRL_IVT 0x0020
+#define EMAC_TX_CTRL_RVT 0x0010
+#define EMAC_TX_CTRL_TAH_CSUM 0x000e
+
+/* EMAC specific TX descriptor status fields (read access) */
+#define EMAC_TX_ST_BFCS 0x0200
+#define EMAC_TX_ST_LCS 0x0080
+#define EMAC_TX_ST_ED 0x0040
+#define EMAC_TX_ST_EC 0x0020
+#define EMAC_TX_ST_LC 0x0010
+#define EMAC_TX_ST_MC 0x0008
+#define EMAC_TX_ST_SC 0x0004
+#define EMAC_TX_ST_UR 0x0002
+#define EMAC_TX_ST_SQE 0x0001
+#define EMAC_IS_BAD_TX (EMAC_TX_ST_LCS | EMAC_TX_ST_ED | \
+ EMAC_TX_ST_EC | EMAC_TX_ST_LC | \
+ EMAC_TX_ST_MC | EMAC_TX_ST_UR)
+#define EMAC_IS_BAD_TX_TAH (EMAC_TX_ST_LCS | EMAC_TX_ST_ED | \
+ EMAC_TX_ST_EC | EMAC_TX_ST_LC)
+
+/* EMAC specific RX descriptor status fields (read access) */
+#define EMAC_RX_ST_OE 0x0200
+#define EMAC_RX_ST_PP 0x0100
+#define EMAC_RX_ST_BP 0x0080
+#define EMAC_RX_ST_RP 0x0040
+#define EMAC_RX_ST_SE 0x0020
+#define EMAC_RX_ST_AE 0x0010
+#define EMAC_RX_ST_BFCS 0x0008
+#define EMAC_RX_ST_PTL 0x0004
+#define EMAC_RX_ST_ORE 0x0002
+#define EMAC_RX_ST_IRE 0x0001
+#define EMAC_RX_TAH_BAD_CSUM 0x0003
+#define EMAC_BAD_RX_MASK (EMAC_RX_ST_OE | EMAC_RX_ST_BP | \
+ EMAC_RX_ST_RP | EMAC_RX_ST_SE | \
+ EMAC_RX_ST_AE | EMAC_RX_ST_BFCS | \
+ EMAC_RX_ST_PTL | EMAC_RX_ST_ORE | \
+ EMAC_RX_ST_IRE )
+#endif /* __IBM_NEWEMAC_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/mal.c
+ *
+ * Memory Access Layer (MAL) support
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Benjamin Herrenschmidt <benh@kernel.crashing.org>,
+ * David Gibson <hermes@gibson.dropbear.id.au>,
+ *
+ * Armin Kuster <akuster@mvista.com>
+ * Copyright 2002 MontaVista Softare Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/delay.h>
+
+#include "core.h"
+
+static int mal_count;
+
+int __devinit mal_register_commac(struct mal_instance *mal,
+ struct mal_commac *commac)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "reg(%08x, %08x)" NL,
+ commac->tx_chan_mask, commac->rx_chan_mask);
+
+ /* Don't let multiple commacs claim the same channel(s) */
+ if ((mal->tx_chan_mask & commac->tx_chan_mask) ||
+ (mal->rx_chan_mask & commac->rx_chan_mask)) {
+ spin_unlock_irqrestore(&mal->lock, flags);
+ printk(KERN_WARNING "mal%d: COMMAC channels conflict!\n",
+ mal->index);
+ return -EBUSY;
+ }
+
+ mal->tx_chan_mask |= commac->tx_chan_mask;
+ mal->rx_chan_mask |= commac->rx_chan_mask;
+ list_add(&commac->list, &mal->list);
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+
+ return 0;
+}
+
+void __devexit mal_unregister_commac(struct mal_instance *mal,
+ struct mal_commac *commac)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "unreg(%08x, %08x)" NL,
+ commac->tx_chan_mask, commac->rx_chan_mask);
+
+ mal->tx_chan_mask &= ~commac->tx_chan_mask;
+ mal->rx_chan_mask &= ~commac->rx_chan_mask;
+ list_del_init(&commac->list);
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+}
+
+int mal_set_rcbs(struct mal_instance *mal, int channel, unsigned long size)
+{
+ BUG_ON(channel < 0 || channel >= mal->num_rx_chans ||
+ size > MAL_MAX_RX_SIZE);
+
+ MAL_DBG(mal, "set_rbcs(%d, %lu)" NL, channel, size);
+
+ if (size & 0xf) {
+ printk(KERN_WARNING
+ "mal%d: incorrect RX size %lu for the channel %d\n",
+ mal->index, size, channel);
+ return -EINVAL;
+ }
+
+ set_mal_dcrn(mal, MAL_RCBS(channel), size >> 4);
+ return 0;
+}
+
+int mal_tx_bd_offset(struct mal_instance *mal, int channel)
+{
+ BUG_ON(channel < 0 || channel >= mal->num_tx_chans);
+
+ return channel * NUM_TX_BUFF;
+}
+
+int mal_rx_bd_offset(struct mal_instance *mal, int channel)
+{
+ BUG_ON(channel < 0 || channel >= mal->num_rx_chans);
+ return mal->num_tx_chans * NUM_TX_BUFF + channel * NUM_RX_BUFF;
+}
+
+void mal_enable_tx_channel(struct mal_instance *mal, int channel)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "enable_tx(%d)" NL, channel);
+
+ set_mal_dcrn(mal, MAL_TXCASR,
+ get_mal_dcrn(mal, MAL_TXCASR) | MAL_CHAN_MASK(channel));
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+}
+
+void mal_disable_tx_channel(struct mal_instance *mal, int channel)
+{
+ set_mal_dcrn(mal, MAL_TXCARR, MAL_CHAN_MASK(channel));
+
+ MAL_DBG(mal, "disable_tx(%d)" NL, channel);
+}
+
+void mal_enable_rx_channel(struct mal_instance *mal, int channel)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "enable_rx(%d)" NL, channel);
+
+ set_mal_dcrn(mal, MAL_RXCASR,
+ get_mal_dcrn(mal, MAL_RXCASR) | MAL_CHAN_MASK(channel));
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+}
+
+void mal_disable_rx_channel(struct mal_instance *mal, int channel)
+{
+ set_mal_dcrn(mal, MAL_RXCARR, MAL_CHAN_MASK(channel));
+
+ MAL_DBG(mal, "disable_rx(%d)" NL, channel);
+}
+
+void mal_poll_add(struct mal_instance *mal, struct mal_commac *commac)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "poll_add(%p)" NL, commac);
+
+ /* starts disabled */
+ set_bit(MAL_COMMAC_POLL_DISABLED, &commac->flags);
+
+ list_add_tail(&commac->poll_list, &mal->poll_list);
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+}
+
+void mal_poll_del(struct mal_instance *mal, struct mal_commac *commac)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mal->lock, flags);
+
+ MAL_DBG(mal, "poll_del(%p)" NL, commac);
+
+ list_del(&commac->poll_list);
+
+ spin_unlock_irqrestore(&mal->lock, flags);
+}
+
+/* synchronized by mal_poll() */
+static inline void mal_enable_eob_irq(struct mal_instance *mal)
+{
+ MAL_DBG2(mal, "enable_irq" NL);
+
+ // XXX might want to cache MAL_CFG as the DCR read can be slooooow
+ set_mal_dcrn(mal, MAL_CFG, get_mal_dcrn(mal, MAL_CFG) | MAL_CFG_EOPIE);
+}
+
+/* synchronized by __LINK_STATE_RX_SCHED bit in ndev->state */
+static inline void mal_disable_eob_irq(struct mal_instance *mal)
+{
+ // XXX might want to cache MAL_CFG as the DCR read can be slooooow
+ set_mal_dcrn(mal, MAL_CFG, get_mal_dcrn(mal, MAL_CFG) & ~MAL_CFG_EOPIE);
+
+ MAL_DBG2(mal, "disable_irq" NL);
+}
+
+static irqreturn_t mal_serr(int irq, void *dev_instance)
+{
+ struct mal_instance *mal = dev_instance;
+
+ u32 esr = get_mal_dcrn(mal, MAL_ESR);
+
+ /* Clear the error status register */
+ set_mal_dcrn(mal, MAL_ESR, esr);
+
+ MAL_DBG(mal, "SERR %08x" NL, esr);
+
+ if (esr & MAL_ESR_EVB) {
+ if (esr & MAL_ESR_DE) {
+ /* We ignore Descriptor error,
+ * TXDE or RXDE interrupt will be generated anyway.
+ */
+ return IRQ_HANDLED;
+ }
+
+ if (esr & MAL_ESR_PEIN) {
+ /* PLB error, it's probably buggy hardware or
+ * incorrect physical address in BD (i.e. bug)
+ */
+ if (net_ratelimit())
+ printk(KERN_ERR
+ "mal%d: system error, "
+ "PLB (ESR = 0x%08x)\n",
+ mal->index, esr);
+ return IRQ_HANDLED;
+ }
+
+ /* OPB error, it's probably buggy hardware or incorrect
+ * EBC setup
+ */
+ if (net_ratelimit())
+ printk(KERN_ERR
+ "mal%d: system error, OPB (ESR = 0x%08x)\n",
+ mal->index, esr);
+ }
+ return IRQ_HANDLED;
+}
+
+static inline void mal_schedule_poll(struct mal_instance *mal)
+{
+ if (likely(netif_rx_schedule_prep(&mal->poll_dev))) {
+ MAL_DBG2(mal, "schedule_poll" NL);
+ mal_disable_eob_irq(mal);
+ __netif_rx_schedule(&mal->poll_dev);
+ } else
+ MAL_DBG2(mal, "already in poll" NL);
+}
+
+static irqreturn_t mal_txeob(int irq, void *dev_instance)
+{
+ struct mal_instance *mal = dev_instance;
+
+ u32 r = get_mal_dcrn(mal, MAL_TXEOBISR);
+
+ MAL_DBG2(mal, "txeob %08x" NL, r);
+
+ mal_schedule_poll(mal);
+ set_mal_dcrn(mal, MAL_TXEOBISR, r);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_rxeob(int irq, void *dev_instance)
+{
+ struct mal_instance *mal = dev_instance;
+
+ u32 r = get_mal_dcrn(mal, MAL_RXEOBISR);
+
+ MAL_DBG2(mal, "rxeob %08x" NL, r);
+
+ mal_schedule_poll(mal);
+ set_mal_dcrn(mal, MAL_RXEOBISR, r);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_txde(int irq, void *dev_instance)
+{
+ struct mal_instance *mal = dev_instance;
+
+ u32 deir = get_mal_dcrn(mal, MAL_TXDEIR);
+ set_mal_dcrn(mal, MAL_TXDEIR, deir);
+
+ MAL_DBG(mal, "txde %08x" NL, deir);
+
+ if (net_ratelimit())
+ printk(KERN_ERR
+ "mal%d: TX descriptor error (TXDEIR = 0x%08x)\n",
+ mal->index, deir);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_rxde(int irq, void *dev_instance)
+{
+ struct mal_instance *mal = dev_instance;
+ struct list_head *l;
+
+ u32 deir = get_mal_dcrn(mal, MAL_RXDEIR);
+
+ MAL_DBG(mal, "rxde %08x" NL, deir);
+
+ list_for_each(l, &mal->list) {
+ struct mal_commac *mc = list_entry(l, struct mal_commac, list);
+ if (deir & mc->rx_chan_mask) {
+ set_bit(MAL_COMMAC_RX_STOPPED, &mc->flags);
+ mc->ops->rxde(mc->dev);
+ }
+ }
+
+ mal_schedule_poll(mal);
+ set_mal_dcrn(mal, MAL_RXDEIR, deir);
+
+ return IRQ_HANDLED;
+}
+
+void mal_poll_disable(struct mal_instance *mal, struct mal_commac *commac)
+{
+ /* Spinlock-type semantics: only one caller disable poll at a time */
+ while (test_and_set_bit(MAL_COMMAC_POLL_DISABLED, &commac->flags))
+ msleep(1);
+
+ /* Synchronize with the MAL NAPI poller. */
+ while (test_bit(__LINK_STATE_RX_SCHED, &mal->poll_dev.state))
+ msleep(1);
+}
+
+void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac)
+{
+ smp_wmb();
+ clear_bit(MAL_COMMAC_POLL_DISABLED, &commac->flags);
+
+ // XXX might want to kick a poll now...
+}
+
+static int mal_poll(struct net_device *ndev, int *budget)
+{
+ struct mal_instance *mal = netdev_priv(ndev);
+ struct list_head *l;
+ int rx_work_limit = min(ndev->quota, *budget), received = 0, done;
+ unsigned long flags;
+
+ MAL_DBG2(mal, "poll(%d) %d ->" NL, *budget,
+ rx_work_limit);
+ again:
+ /* Process TX skbs */
+ list_for_each(l, &mal->poll_list) {
+ struct mal_commac *mc =
+ list_entry(l, struct mal_commac, poll_list);
+ mc->ops->poll_tx(mc->dev);
+ }
+
+ /* Process RX skbs.
+ *
+ * We _might_ need something more smart here to enforce polling
+ * fairness.
+ */
+ list_for_each(l, &mal->poll_list) {
+ struct mal_commac *mc =
+ list_entry(l, struct mal_commac, poll_list);
+ int n;
+ if (unlikely(test_bit(MAL_COMMAC_POLL_DISABLED, &mc->flags)))
+ continue;
+ n = mc->ops->poll_rx(mc->dev, rx_work_limit);
+ if (n) {
+ received += n;
+ rx_work_limit -= n;
+ if (rx_work_limit <= 0) {
+ done = 0;
+ // XXX What if this is the last one ?
+ goto more_work;
+ }
+ }
+ }
+
+ /* We need to disable IRQs to protect from RXDE IRQ here */
+ spin_lock_irqsave(&mal->lock, flags);
+ __netif_rx_complete(ndev);
+ mal_enable_eob_irq(mal);
+ spin_unlock_irqrestore(&mal->lock, flags);
+
+ done = 1;
+
+ /* Check for "rotting" packet(s) */
+ list_for_each(l, &mal->poll_list) {
+ struct mal_commac *mc =
+ list_entry(l, struct mal_commac, poll_list);
+ if (unlikely(test_bit(MAL_COMMAC_POLL_DISABLED, &mc->flags)))
+ continue;
+ if (unlikely(mc->ops->peek_rx(mc->dev) ||
+ test_bit(MAL_COMMAC_RX_STOPPED, &mc->flags))) {
+ MAL_DBG2(mal, "rotting packet" NL);
+ if (netif_rx_reschedule(ndev, received))
+ mal_disable_eob_irq(mal);
+ else
+ MAL_DBG2(mal, "already in poll list" NL);
+
+ if (rx_work_limit > 0)
+ goto again;
+ else
+ goto more_work;
+ }
+ mc->ops->poll_tx(mc->dev);
+ }
+
+ more_work:
+ ndev->quota -= received;
+ *budget -= received;
+
+ MAL_DBG2(mal, "poll() %d <- %d" NL, *budget,
+ done ? 0 : 1);
+
+ return done ? 0 : 1;
+}
+
+static void mal_reset(struct mal_instance *mal)
+{
+ int n = 10;
+
+ MAL_DBG(mal, "reset" NL);
+
+ set_mal_dcrn(mal, MAL_CFG, MAL_CFG_SR);
+
+ /* Wait for reset to complete (1 system clock) */
+ while ((get_mal_dcrn(mal, MAL_CFG) & MAL_CFG_SR) && n)
+ --n;
+
+ if (unlikely(!n))
+ printk(KERN_ERR "mal%d: reset timeout\n", mal->index);
+}
+
+int mal_get_regs_len(struct mal_instance *mal)
+{
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ sizeof(struct mal_regs);
+}
+
+void *mal_dump_regs(struct mal_instance *mal, void *buf)
+{
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+ struct mal_regs *regs = (struct mal_regs *)(hdr + 1);
+ int i;
+
+ hdr->version = mal->version;
+ hdr->index = mal->index;
+
+ regs->tx_count = mal->num_tx_chans;
+ regs->rx_count = mal->num_rx_chans;
+
+ regs->cfg = get_mal_dcrn(mal, MAL_CFG);
+ regs->esr = get_mal_dcrn(mal, MAL_ESR);
+ regs->ier = get_mal_dcrn(mal, MAL_IER);
+ regs->tx_casr = get_mal_dcrn(mal, MAL_TXCASR);
+ regs->tx_carr = get_mal_dcrn(mal, MAL_TXCARR);
+ regs->tx_eobisr = get_mal_dcrn(mal, MAL_TXEOBISR);
+ regs->tx_deir = get_mal_dcrn(mal, MAL_TXDEIR);
+ regs->rx_casr = get_mal_dcrn(mal, MAL_RXCASR);
+ regs->rx_carr = get_mal_dcrn(mal, MAL_RXCARR);
+ regs->rx_eobisr = get_mal_dcrn(mal, MAL_RXEOBISR);
+ regs->rx_deir = get_mal_dcrn(mal, MAL_RXDEIR);
+
+ for (i = 0; i < regs->tx_count; ++i)
+ regs->tx_ctpr[i] = get_mal_dcrn(mal, MAL_TXCTPR(i));
+
+ for (i = 0; i < regs->rx_count; ++i) {
+ regs->rx_ctpr[i] = get_mal_dcrn(mal, MAL_RXCTPR(i));
+ regs->rcbs[i] = get_mal_dcrn(mal, MAL_RCBS(i));
+ }
+ return regs + 1;
+}
+
+static int __devinit mal_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct mal_instance *mal;
+ int err = 0, i, bd_size;
+ int index = mal_count++;
+ const u32 *prop;
+ u32 cfg;
+
+ mal = kzalloc(sizeof(struct mal_instance), GFP_KERNEL);
+ if (!mal) {
+ printk(KERN_ERR
+ "mal%d: out of memory allocating MAL structure!\n",
+ index);
+ return -ENOMEM;
+ }
+ mal->index = index;
+ mal->ofdev = ofdev;
+ mal->version = of_device_is_compatible(ofdev->node, "ibm,mcmal2") ? 2 : 1;
+
+ MAL_DBG(mal, "probe" NL);
+
+ prop = of_get_property(ofdev->node, "num-tx-chans", NULL);
+ if (prop == NULL) {
+ printk(KERN_ERR
+ "mal%d: can't find MAL num-tx-chans property!\n",
+ index);
+ err = -ENODEV;
+ goto fail;
+ }
+ mal->num_tx_chans = prop[0];
+
+ prop = of_get_property(ofdev->node, "num-rx-chans", NULL);
+ if (prop == NULL) {
+ printk(KERN_ERR
+ "mal%d: can't find MAL num-rx-chans property!\n",
+ index);
+ err = -ENODEV;
+ goto fail;
+ }
+ mal->num_rx_chans = prop[0];
+
+ mal->dcr_base = dcr_resource_start(ofdev->node, 0);
+ if (mal->dcr_base == 0) {
+ printk(KERN_ERR
+ "mal%d: can't find DCR resource!\n", index);
+ err = -ENODEV;
+ goto fail;
+ }
+ mal->dcr_host = dcr_map(ofdev->node, mal->dcr_base, 0x100);
+ if (!DCR_MAP_OK(mal->dcr_host)) {
+ printk(KERN_ERR
+ "mal%d: failed to map DCRs !\n", index);
+ err = -ENODEV;
+ goto fail;
+ }
+
+ mal->txeob_irq = irq_of_parse_and_map(ofdev->node, 0);
+ mal->rxeob_irq = irq_of_parse_and_map(ofdev->node, 1);
+ mal->serr_irq = irq_of_parse_and_map(ofdev->node, 2);
+ mal->txde_irq = irq_of_parse_and_map(ofdev->node, 3);
+ mal->rxde_irq = irq_of_parse_and_map(ofdev->node, 4);
+ if (mal->txeob_irq == NO_IRQ || mal->rxeob_irq == NO_IRQ ||
+ mal->serr_irq == NO_IRQ || mal->txde_irq == NO_IRQ ||
+ mal->rxde_irq == NO_IRQ) {
+ printk(KERN_ERR
+ "mal%d: failed to map interrupts !\n", index);
+ err = -ENODEV;
+ goto fail_unmap;
+ }
+
+ INIT_LIST_HEAD(&mal->poll_list);
+ set_bit(__LINK_STATE_START, &mal->poll_dev.state);
+ mal->poll_dev.weight = CONFIG_IBM_NEW_EMAC_POLL_WEIGHT;
+ mal->poll_dev.poll = mal_poll;
+ mal->poll_dev.priv = mal;
+ atomic_set(&mal->poll_dev.refcnt, 1);
+ INIT_LIST_HEAD(&mal->list);
+ spin_lock_init(&mal->lock);
+
+ /* Load power-on reset defaults */
+ mal_reset(mal);
+
+ /* Set the MAL configuration register */
+ cfg = (mal->version == 2) ? MAL2_CFG_DEFAULT : MAL1_CFG_DEFAULT;
+ cfg |= MAL_CFG_PLBB | MAL_CFG_OPBBL | MAL_CFG_LEA;
+
+ /* Current Axon is not happy with priority being non-0, it can
+ * deadlock, fix it up here
+ */
+ if (of_device_is_compatible(ofdev->node, "ibm,mcmal-axon"))
+ cfg &= ~(MAL2_CFG_RPP_10 | MAL2_CFG_WPP_10);
+
+ /* Apply configuration */
+ set_mal_dcrn(mal, MAL_CFG, cfg);
+
+ /* Allocate space for BD rings */
+ BUG_ON(mal->num_tx_chans <= 0 || mal->num_tx_chans > 32);
+ BUG_ON(mal->num_rx_chans <= 0 || mal->num_rx_chans > 32);
+
+ bd_size = sizeof(struct mal_descriptor) *
+ (NUM_TX_BUFF * mal->num_tx_chans +
+ NUM_RX_BUFF * mal->num_rx_chans);
+ mal->bd_virt =
+ dma_alloc_coherent(&ofdev->dev, bd_size, &mal->bd_dma,
+ GFP_KERNEL);
+ if (mal->bd_virt == NULL) {
+ printk(KERN_ERR
+ "mal%d: out of memory allocating RX/TX descriptors!\n",
+ index);
+ err = -ENOMEM;
+ goto fail_unmap;
+ }
+ memset(mal->bd_virt, 0, bd_size);
+
+ for (i = 0; i < mal->num_tx_chans; ++i)
+ set_mal_dcrn(mal, MAL_TXCTPR(i), mal->bd_dma +
+ sizeof(struct mal_descriptor) *
+ mal_tx_bd_offset(mal, i));
+
+ for (i = 0; i < mal->num_rx_chans; ++i)
+ set_mal_dcrn(mal, MAL_RXCTPR(i), mal->bd_dma +
+ sizeof(struct mal_descriptor) *
+ mal_rx_bd_offset(mal, i));
+
+ err = request_irq(mal->serr_irq, mal_serr, 0, "MAL SERR", mal);
+ if (err)
+ goto fail2;
+ err = request_irq(mal->txde_irq, mal_txde, 0, "MAL TX DE", mal);
+ if (err)
+ goto fail3;
+ err = request_irq(mal->txeob_irq, mal_txeob, 0, "MAL TX EOB", mal);
+ if (err)
+ goto fail4;
+ err = request_irq(mal->rxde_irq, mal_rxde, 0, "MAL RX DE", mal);
+ if (err)
+ goto fail5;
+ err = request_irq(mal->rxeob_irq, mal_rxeob, 0, "MAL RX EOB", mal);
+ if (err)
+ goto fail6;
+
+ /* Enable all MAL SERR interrupt sources */
+ if (mal->version == 2)
+ set_mal_dcrn(mal, MAL_IER, MAL2_IER_EVENTS);
+ else
+ set_mal_dcrn(mal, MAL_IER, MAL1_IER_EVENTS);
+
+ /* Enable EOB interrupt */
+ mal_enable_eob_irq(mal);
+
+ printk(KERN_INFO
+ "MAL v%d %s, %d TX channels, %d RX channels\n",
+ mal->version, ofdev->node->full_name,
+ mal->num_tx_chans, mal->num_rx_chans);
+
+ /* Advertise this instance to the rest of the world */
+ wmb();
+ dev_set_drvdata(&ofdev->dev, mal);
+
+ mal_dbg_register(mal);
+
+ return 0;
+
+ fail6:
+ free_irq(mal->rxde_irq, mal);
+ fail5:
+ free_irq(mal->txeob_irq, mal);
+ fail4:
+ free_irq(mal->txde_irq, mal);
+ fail3:
+ free_irq(mal->serr_irq, mal);
+ fail2:
+ dma_free_coherent(&ofdev->dev, bd_size, mal->bd_virt, mal->bd_dma);
+ fail_unmap:
+ dcr_unmap(mal->dcr_host, mal->dcr_base, 0x100);
+ fail:
+ kfree(mal);
+
+ return err;
+}
+
+static int __devexit mal_remove(struct of_device *ofdev)
+{
+ struct mal_instance *mal = dev_get_drvdata(&ofdev->dev);
+
+ MAL_DBG(mal, "remove" NL);
+
+ /* Syncronize with scheduled polling,
+ stolen from net/core/dev.c:dev_close()
+ */
+ clear_bit(__LINK_STATE_START, &mal->poll_dev.state);
+ netif_poll_disable(&mal->poll_dev);
+
+ if (!list_empty(&mal->list)) {
+ /* This is *very* bad */
+ printk(KERN_EMERG
+ "mal%d: commac list is not empty on remove!\n",
+ mal->index);
+ WARN_ON(1);
+ }
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ free_irq(mal->serr_irq, mal);
+ free_irq(mal->txde_irq, mal);
+ free_irq(mal->txeob_irq, mal);
+ free_irq(mal->rxde_irq, mal);
+ free_irq(mal->rxeob_irq, mal);
+
+ mal_reset(mal);
+
+ mal_dbg_unregister(mal);
+
+ dma_free_coherent(&ofdev->dev,
+ sizeof(struct mal_descriptor) *
+ (NUM_TX_BUFF * mal->num_tx_chans +
+ NUM_RX_BUFF * mal->num_rx_chans), mal->bd_virt,
+ mal->bd_dma);
+ kfree(mal);
+
+ return 0;
+}
+
+static struct of_device_id mal_platform_match[] =
+{
+ {
+ .compatible = "ibm,mcmal",
+ },
+ {
+ .compatible = "ibm,mcmal2",
+ },
+ /* Backward compat */
+ {
+ .type = "mcmal-dma",
+ .compatible = "ibm,mcmal",
+ },
+ {
+ .type = "mcmal-dma",
+ .compatible = "ibm,mcmal2",
+ },
+ {},
+};
+
+static struct of_platform_driver mal_of_driver = {
+ .name = "mcmal",
+ .match_table = mal_platform_match,
+
+ .probe = mal_probe,
+ .remove = mal_remove,
+};
+
+int __init mal_init(void)
+{
+ return of_register_platform_driver(&mal_of_driver);
+}
+
+void mal_exit(void)
+{
+ of_unregister_platform_driver(&mal_of_driver);
+}
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/mal.h
+ *
+ * Memory Access Layer (MAL) support
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Armin Kuster <akuster@mvista.com>
+ * Copyright 2002 MontaVista Softare Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __IBM_NEWEMAC_MAL_H
+#define __IBM_NEWEMAC_MAL_H
+
+/*
+ * There are some variations on the MAL, we express them in this driver as
+ * MAL Version 1 and 2 though that doesn't match any IBM terminology.
+ *
+ * We call MAL 1 the version in 405GP, 405GPR, 405EP, 440EP, 440GR and
+ * NP405H.
+ *
+ * We call MAL 2 the version in 440GP, 440GX, 440SP, 440SPE and Axon
+ *
+ * The driver expects a "version" property in the emac node containing
+ * a number 1 or 2. New device-trees for EMAC capable platforms are thus
+ * required to include that when porting to arch/powerpc.
+ */
+
+/* MALx DCR registers */
+#define MAL_CFG 0x00
+#define MAL_CFG_SR 0x80000000
+#define MAL_CFG_PLBB 0x00004000
+#define MAL_CFG_OPBBL 0x00000080
+#define MAL_CFG_EOPIE 0x00000004
+#define MAL_CFG_LEA 0x00000002
+#define MAL_CFG_SD 0x00000001
+
+/* MAL V1 CFG bits */
+#define MAL1_CFG_PLBP_MASK 0x00c00000
+#define MAL1_CFG_PLBP_10 0x00800000
+#define MAL1_CFG_GA 0x00200000
+#define MAL1_CFG_OA 0x00100000
+#define MAL1_CFG_PLBLE 0x00080000
+#define MAL1_CFG_PLBT_MASK 0x00078000
+#define MAL1_CFG_DEFAULT (MAL1_CFG_PLBP_10 | MAL1_CFG_PLBT_MASK)
+
+/* MAL V2 CFG bits */
+#define MAL2_CFG_RPP_MASK 0x00c00000
+#define MAL2_CFG_RPP_10 0x00800000
+#define MAL2_CFG_RMBS_MASK 0x00300000
+#define MAL2_CFG_WPP_MASK 0x000c0000
+#define MAL2_CFG_WPP_10 0x00080000
+#define MAL2_CFG_WMBS_MASK 0x00030000
+#define MAL2_CFG_PLBLE 0x00008000
+#define MAL2_CFG_DEFAULT (MAL2_CFG_RMBS_MASK | MAL2_CFG_WMBS_MASK | \
+ MAL2_CFG_RPP_10 | MAL2_CFG_WPP_10)
+
+#define MAL_ESR 0x01
+#define MAL_ESR_EVB 0x80000000
+#define MAL_ESR_CIDT 0x40000000
+#define MAL_ESR_CID_MASK 0x3e000000
+#define MAL_ESR_CID_SHIFT 25
+#define MAL_ESR_DE 0x00100000
+#define MAL_ESR_OTE 0x00040000
+#define MAL_ESR_OSE 0x00020000
+#define MAL_ESR_PEIN 0x00010000
+#define MAL_ESR_DEI 0x00000010
+#define MAL_ESR_OTEI 0x00000004
+#define MAL_ESR_OSEI 0x00000002
+#define MAL_ESR_PBEI 0x00000001
+
+/* MAL V1 ESR bits */
+#define MAL1_ESR_ONE 0x00080000
+#define MAL1_ESR_ONEI 0x00000008
+
+/* MAL V2 ESR bits */
+#define MAL2_ESR_PTE 0x00800000
+#define MAL2_ESR_PRE 0x00400000
+#define MAL2_ESR_PWE 0x00200000
+#define MAL2_ESR_PTEI 0x00000080
+#define MAL2_ESR_PREI 0x00000040
+#define MAL2_ESR_PWEI 0x00000020
+
+
+#define MAL_IER 0x02
+#define MAL_IER_DE 0x00000010
+#define MAL_IER_OTE 0x00000004
+#define MAL_IER_OE 0x00000002
+#define MAL_IER_PE 0x00000001
+/* MAL V1 IER bits */
+#define MAL1_IER_NWE 0x00000008
+#define MAL1_IER_SOC_EVENTS MAL1_IER_NWE
+#define MAL1_IER_EVENTS (MAL1_IER_SOC_EVENTS | MAL_IER_OTE | \
+ MAL_IER_OTE | MAL_IER_OE | MAL_IER_PE)
+
+/* MAL V2 IER bits */
+#define MAL2_IER_PT 0x00000080
+#define MAL2_IER_PRE 0x00000040
+#define MAL2_IER_PWE 0x00000020
+#define MAL2_IER_SOC_EVENTS (MAL2_IER_PT | MAL2_IER_PRE | MAL2_IER_PWE)
+#define MAL2_IER_EVENTS (MAL2_IER_SOC_EVENTS | MAL_IER_OTE | \
+ MAL_IER_OTE | MAL_IER_OE | MAL_IER_PE)
+
+
+#define MAL_TXCASR 0x04
+#define MAL_TXCARR 0x05
+#define MAL_TXEOBISR 0x06
+#define MAL_TXDEIR 0x07
+#define MAL_RXCASR 0x10
+#define MAL_RXCARR 0x11
+#define MAL_RXEOBISR 0x12
+#define MAL_RXDEIR 0x13
+#define MAL_TXCTPR(n) ((n) + 0x20)
+#define MAL_RXCTPR(n) ((n) + 0x40)
+#define MAL_RCBS(n) ((n) + 0x60)
+
+/* In reality MAL can handle TX buffers up to 4095 bytes long,
+ * but this isn't a good round number :) --ebs
+ */
+#define MAL_MAX_TX_SIZE 4080
+#define MAL_MAX_RX_SIZE 4080
+
+static inline int mal_rx_size(int len)
+{
+ len = (len + 0xf) & ~0xf;
+ return len > MAL_MAX_RX_SIZE ? MAL_MAX_RX_SIZE : len;
+}
+
+static inline int mal_tx_chunks(int len)
+{
+ return (len + MAL_MAX_TX_SIZE - 1) / MAL_MAX_TX_SIZE;
+}
+
+#define MAL_CHAN_MASK(n) (0x80000000 >> (n))
+
+/* MAL Buffer Descriptor structure */
+struct mal_descriptor {
+ u16 ctrl; /* MAL / Commac status control bits */
+ u16 data_len; /* Max length is 4K-1 (12 bits) */
+ u32 data_ptr; /* pointer to actual data buffer */
+};
+
+/* the following defines are for the MadMAL status and control registers. */
+/* MADMAL transmit and receive status/control bits */
+#define MAL_RX_CTRL_EMPTY 0x8000
+#define MAL_RX_CTRL_WRAP 0x4000
+#define MAL_RX_CTRL_CM 0x2000
+#define MAL_RX_CTRL_LAST 0x1000
+#define MAL_RX_CTRL_FIRST 0x0800
+#define MAL_RX_CTRL_INTR 0x0400
+#define MAL_RX_CTRL_SINGLE (MAL_RX_CTRL_LAST | MAL_RX_CTRL_FIRST)
+#define MAL_IS_SINGLE_RX(ctrl) (((ctrl) & MAL_RX_CTRL_SINGLE) == MAL_RX_CTRL_SINGLE)
+
+#define MAL_TX_CTRL_READY 0x8000
+#define MAL_TX_CTRL_WRAP 0x4000
+#define MAL_TX_CTRL_CM 0x2000
+#define MAL_TX_CTRL_LAST 0x1000
+#define MAL_TX_CTRL_INTR 0x0400
+
+struct mal_commac_ops {
+ void (*poll_tx) (void *dev);
+ int (*poll_rx) (void *dev, int budget);
+ int (*peek_rx) (void *dev);
+ void (*rxde) (void *dev);
+};
+
+struct mal_commac {
+ struct mal_commac_ops *ops;
+ void *dev;
+ struct list_head poll_list;
+ long flags;
+#define MAL_COMMAC_RX_STOPPED 0
+#define MAL_COMMAC_POLL_DISABLED 1
+ u32 tx_chan_mask;
+ u32 rx_chan_mask;
+ struct list_head list;
+};
+
+struct mal_instance {
+ int version;
+ int dcr_base;
+ dcr_host_t dcr_host;
+
+ int num_tx_chans; /* Number of TX channels */
+ int num_rx_chans; /* Number of RX channels */
+ int txeob_irq; /* TX End Of Buffer IRQ */
+ int rxeob_irq; /* RX End Of Buffer IRQ */
+ int txde_irq; /* TX Descriptor Error IRQ */
+ int rxde_irq; /* RX Descriptor Error IRQ */
+ int serr_irq; /* MAL System Error IRQ */
+
+ struct list_head poll_list;
+ struct net_device poll_dev;
+
+ struct list_head list;
+ u32 tx_chan_mask;
+ u32 rx_chan_mask;
+
+ dma_addr_t bd_dma;
+ struct mal_descriptor *bd_virt;
+
+ struct of_device *ofdev;
+ int index;
+ spinlock_t lock;
+};
+
+static inline u32 get_mal_dcrn(struct mal_instance *mal, int reg)
+{
+ return dcr_read(mal->dcr_host, mal->dcr_base + reg);
+}
+
+static inline void set_mal_dcrn(struct mal_instance *mal, int reg, u32 val)
+{
+ dcr_write(mal->dcr_host, mal->dcr_base + reg, val);
+}
+
+/* Register MAL devices */
+int mal_init(void);
+void mal_exit(void);
+
+int mal_register_commac(struct mal_instance *mal,
+ struct mal_commac *commac);
+void mal_unregister_commac(struct mal_instance *mal,
+ struct mal_commac *commac);
+int mal_set_rcbs(struct mal_instance *mal, int channel, unsigned long size);
+
+/* Returns BD ring offset for a particular channel
+ (in 'struct mal_descriptor' elements)
+*/
+int mal_tx_bd_offset(struct mal_instance *mal, int channel);
+int mal_rx_bd_offset(struct mal_instance *mal, int channel);
+
+void mal_enable_tx_channel(struct mal_instance *mal, int channel);
+void mal_disable_tx_channel(struct mal_instance *mal, int channel);
+void mal_enable_rx_channel(struct mal_instance *mal, int channel);
+void mal_disable_rx_channel(struct mal_instance *mal, int channel);
+
+void mal_poll_disable(struct mal_instance *mal, struct mal_commac *commac);
+void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac);
+
+/* Add/remove EMAC to/from MAL polling list */
+void mal_poll_add(struct mal_instance *mal, struct mal_commac *commac);
+void mal_poll_del(struct mal_instance *mal, struct mal_commac *commac);
+
+/* Ethtool MAL registers */
+struct mal_regs {
+ u32 tx_count;
+ u32 rx_count;
+
+ u32 cfg;
+ u32 esr;
+ u32 ier;
+ u32 tx_casr;
+ u32 tx_carr;
+ u32 tx_eobisr;
+ u32 tx_deir;
+ u32 rx_casr;
+ u32 rx_carr;
+ u32 rx_eobisr;
+ u32 rx_deir;
+ u32 tx_ctpr[32];
+ u32 rx_ctpr[32];
+ u32 rcbs[32];
+};
+
+int mal_get_regs_len(struct mal_instance *mal);
+void *mal_dump_regs(struct mal_instance *mal, void *buf);
+
+#endif /* __IBM_NEWEMAC_MAL_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/phy.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, PHY support.
+ * Borrowed from sungem_phy.c, though I only kept the generic MII
+ * driver for now.
+ *
+ * This file should be shared with other drivers or eventually
+ * merged as the "low level" part of miilib
+ *
+ * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
+ * (c) 2004-2005, Eugene Surovegin <ebs@ebshome.net>
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/delay.h>
+
+#include "emac.h"
+#include "phy.h"
+
+static inline int phy_read(struct mii_phy *phy, int reg)
+{
+ return phy->mdio_read(phy->dev, phy->address, reg);
+}
+
+static inline void phy_write(struct mii_phy *phy, int reg, int val)
+{
+ phy->mdio_write(phy->dev, phy->address, reg, val);
+}
+
+int emac_mii_reset_phy(struct mii_phy *phy)
+{
+ int val;
+ int limit = 10000;
+
+ val = phy_read(phy, MII_BMCR);
+ val &= ~(BMCR_ISOLATE | BMCR_ANENABLE);
+ val |= BMCR_RESET;
+ phy_write(phy, MII_BMCR, val);
+
+ udelay(300);
+
+ while (limit--) {
+ val = phy_read(phy, MII_BMCR);
+ if (val >= 0 && (val & BMCR_RESET) == 0)
+ break;
+ udelay(10);
+ }
+ if ((val & BMCR_ISOLATE) && limit > 0)
+ phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
+
+ return limit <= 0;
+}
+
+static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
+{
+ int ctl, adv;
+
+ phy->autoneg = AUTONEG_ENABLE;
+ phy->speed = SPEED_10;
+ phy->duplex = DUPLEX_HALF;
+ phy->pause = phy->asym_pause = 0;
+ phy->advertising = advertise;
+
+ ctl = phy_read(phy, MII_BMCR);
+ if (ctl < 0)
+ return ctl;
+ ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
+
+ /* First clear the PHY */
+ phy_write(phy, MII_BMCR, ctl);
+
+ /* Setup standard advertise */
+ adv = phy_read(phy, MII_ADVERTISE);
+ if (adv < 0)
+ return adv;
+ adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
+ ADVERTISE_PAUSE_ASYM);
+ if (advertise & ADVERTISED_10baseT_Half)
+ adv |= ADVERTISE_10HALF;
+ if (advertise & ADVERTISED_10baseT_Full)
+ adv |= ADVERTISE_10FULL;
+ if (advertise & ADVERTISED_100baseT_Half)
+ adv |= ADVERTISE_100HALF;
+ if (advertise & ADVERTISED_100baseT_Full)
+ adv |= ADVERTISE_100FULL;
+ if (advertise & ADVERTISED_Pause)
+ adv |= ADVERTISE_PAUSE_CAP;
+ if (advertise & ADVERTISED_Asym_Pause)
+ adv |= ADVERTISE_PAUSE_ASYM;
+ phy_write(phy, MII_ADVERTISE, adv);
+
+ if (phy->features &
+ (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
+ adv = phy_read(phy, MII_CTRL1000);
+ if (adv < 0)
+ return adv;
+ adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
+ if (advertise & ADVERTISED_1000baseT_Full)
+ adv |= ADVERTISE_1000FULL;
+ if (advertise & ADVERTISED_1000baseT_Half)
+ adv |= ADVERTISE_1000HALF;
+ phy_write(phy, MII_CTRL1000, adv);
+ }
+
+ /* Start/Restart aneg */
+ ctl = phy_read(phy, MII_BMCR);
+ ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
+ phy_write(phy, MII_BMCR, ctl);
+
+ return 0;
+}
+
+static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
+{
+ int ctl;
+
+ phy->autoneg = AUTONEG_DISABLE;
+ phy->speed = speed;
+ phy->duplex = fd;
+ phy->pause = phy->asym_pause = 0;
+
+ ctl = phy_read(phy, MII_BMCR);
+ if (ctl < 0)
+ return ctl;
+ ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
+
+ /* First clear the PHY */
+ phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
+
+ /* Select speed & duplex */
+ switch (speed) {
+ case SPEED_10:
+ break;
+ case SPEED_100:
+ ctl |= BMCR_SPEED100;
+ break;
+ case SPEED_1000:
+ ctl |= BMCR_SPEED1000;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (fd == DUPLEX_FULL)
+ ctl |= BMCR_FULLDPLX;
+ phy_write(phy, MII_BMCR, ctl);
+
+ return 0;
+}
+
+static int genmii_poll_link(struct mii_phy *phy)
+{
+ int status;
+
+ /* Clear latched value with dummy read */
+ phy_read(phy, MII_BMSR);
+ status = phy_read(phy, MII_BMSR);
+ if (status < 0 || (status & BMSR_LSTATUS) == 0)
+ return 0;
+ if (phy->autoneg == AUTONEG_ENABLE && !(status & BMSR_ANEGCOMPLETE))
+ return 0;
+ return 1;
+}
+
+static int genmii_read_link(struct mii_phy *phy)
+{
+ if (phy->autoneg == AUTONEG_ENABLE) {
+ int glpa = 0;
+ int lpa = phy_read(phy, MII_LPA) & phy_read(phy, MII_ADVERTISE);
+ if (lpa < 0)
+ return lpa;
+
+ if (phy->features &
+ (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
+ int adv = phy_read(phy, MII_CTRL1000);
+ glpa = phy_read(phy, MII_STAT1000);
+
+ if (glpa < 0 || adv < 0)
+ return adv;
+
+ glpa &= adv << 2;
+ }
+
+ phy->speed = SPEED_10;
+ phy->duplex = DUPLEX_HALF;
+ phy->pause = phy->asym_pause = 0;
+
+ if (glpa & (LPA_1000FULL | LPA_1000HALF)) {
+ phy->speed = SPEED_1000;
+ if (glpa & LPA_1000FULL)
+ phy->duplex = DUPLEX_FULL;
+ } else if (lpa & (LPA_100FULL | LPA_100HALF)) {
+ phy->speed = SPEED_100;
+ if (lpa & LPA_100FULL)
+ phy->duplex = DUPLEX_FULL;
+ } else if (lpa & LPA_10FULL)
+ phy->duplex = DUPLEX_FULL;
+
+ if (phy->duplex == DUPLEX_FULL) {
+ phy->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
+ phy->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
+ }
+ } else {
+ int bmcr = phy_read(phy, MII_BMCR);
+ if (bmcr < 0)
+ return bmcr;
+
+ if (bmcr & BMCR_FULLDPLX)
+ phy->duplex = DUPLEX_FULL;
+ else
+ phy->duplex = DUPLEX_HALF;
+ if (bmcr & BMCR_SPEED1000)
+ phy->speed = SPEED_1000;
+ else if (bmcr & BMCR_SPEED100)
+ phy->speed = SPEED_100;
+ else
+ phy->speed = SPEED_10;
+
+ phy->pause = phy->asym_pause = 0;
+ }
+ return 0;
+}
+
+/* Generic implementation for most 10/100/1000 PHYs */
+static struct mii_phy_ops generic_phy_ops = {
+ .setup_aneg = genmii_setup_aneg,
+ .setup_forced = genmii_setup_forced,
+ .poll_link = genmii_poll_link,
+ .read_link = genmii_read_link
+};
+
+static struct mii_phy_def genmii_phy_def = {
+ .phy_id = 0x00000000,
+ .phy_id_mask = 0x00000000,
+ .name = "Generic MII",
+ .ops = &generic_phy_ops
+};
+
+/* CIS8201 */
+#define MII_CIS8201_10BTCSR 0x16
+#define TENBTCSR_ECHO_DISABLE 0x2000
+#define MII_CIS8201_EPCR 0x17
+#define EPCR_MODE_MASK 0x3000
+#define EPCR_GMII_MODE 0x0000
+#define EPCR_RGMII_MODE 0x1000
+#define EPCR_TBI_MODE 0x2000
+#define EPCR_RTBI_MODE 0x3000
+#define MII_CIS8201_ACSR 0x1c
+#define ACSR_PIN_PRIO_SELECT 0x0004
+
+static int cis8201_init(struct mii_phy *phy)
+{
+ int epcr;
+
+ epcr = phy_read(phy, MII_CIS8201_EPCR);
+ if (epcr < 0)
+ return epcr;
+
+ epcr &= ~EPCR_MODE_MASK;
+
+ switch (phy->mode) {
+ case PHY_MODE_TBI:
+ epcr |= EPCR_TBI_MODE;
+ break;
+ case PHY_MODE_RTBI:
+ epcr |= EPCR_RTBI_MODE;
+ break;
+ case PHY_MODE_GMII:
+ epcr |= EPCR_GMII_MODE;
+ break;
+ case PHY_MODE_RGMII:
+ default:
+ epcr |= EPCR_RGMII_MODE;
+ }
+
+ phy_write(phy, MII_CIS8201_EPCR, epcr);
+
+ /* MII regs override strap pins */
+ phy_write(phy, MII_CIS8201_ACSR,
+ phy_read(phy, MII_CIS8201_ACSR) | ACSR_PIN_PRIO_SELECT);
+
+ /* Disable TX_EN -> CRS echo mode, otherwise 10/HDX doesn't work */
+ phy_write(phy, MII_CIS8201_10BTCSR,
+ phy_read(phy, MII_CIS8201_10BTCSR) | TENBTCSR_ECHO_DISABLE);
+
+ return 0;
+}
+
+static struct mii_phy_ops cis8201_phy_ops = {
+ .init = cis8201_init,
+ .setup_aneg = genmii_setup_aneg,
+ .setup_forced = genmii_setup_forced,
+ .poll_link = genmii_poll_link,
+ .read_link = genmii_read_link
+};
+
+static struct mii_phy_def cis8201_phy_def = {
+ .phy_id = 0x000fc410,
+ .phy_id_mask = 0x000ffff0,
+ .name = "CIS8201 Gigabit Ethernet",
+ .ops = &cis8201_phy_ops
+};
+
+static struct mii_phy_def *mii_phy_table[] = {
+ &cis8201_phy_def,
+ &genmii_phy_def,
+ NULL
+};
+
+int emac_mii_phy_probe(struct mii_phy *phy, int address)
+{
+ struct mii_phy_def *def;
+ int i;
+ u32 id;
+
+ phy->autoneg = AUTONEG_DISABLE;
+ phy->advertising = 0;
+ phy->address = address;
+ phy->speed = SPEED_10;
+ phy->duplex = DUPLEX_HALF;
+ phy->pause = phy->asym_pause = 0;
+
+ /* Take PHY out of isolate mode and reset it. */
+ if (emac_mii_reset_phy(phy))
+ return -ENODEV;
+
+ /* Read ID and find matching entry */
+ id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2);
+ for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
+ if ((id & def->phy_id_mask) == def->phy_id)
+ break;
+ /* Should never be NULL (we have a generic entry), but... */
+ if (!def)
+ return -ENODEV;
+
+ phy->def = def;
+
+ /* Determine PHY features if needed */
+ phy->features = def->features;
+ if (!phy->features) {
+ u16 bmsr = phy_read(phy, MII_BMSR);
+ if (bmsr & BMSR_ANEGCAPABLE)
+ phy->features |= SUPPORTED_Autoneg;
+ if (bmsr & BMSR_10HALF)
+ phy->features |= SUPPORTED_10baseT_Half;
+ if (bmsr & BMSR_10FULL)
+ phy->features |= SUPPORTED_10baseT_Full;
+ if (bmsr & BMSR_100HALF)
+ phy->features |= SUPPORTED_100baseT_Half;
+ if (bmsr & BMSR_100FULL)
+ phy->features |= SUPPORTED_100baseT_Full;
+ if (bmsr & BMSR_ESTATEN) {
+ u16 esr = phy_read(phy, MII_ESTATUS);
+ if (esr & ESTATUS_1000_TFULL)
+ phy->features |= SUPPORTED_1000baseT_Full;
+ if (esr & ESTATUS_1000_THALF)
+ phy->features |= SUPPORTED_1000baseT_Half;
+ }
+ phy->features |= SUPPORTED_MII;
+ }
+
+ /* Setup default advertising */
+ phy->advertising = phy->features;
+
+ return 0;
+}
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/phy.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, PHY support
+ *
+ * Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * February 2003
+ *
+ * Minor additions by Eugene Surovegin <ebs@ebshome.net>, 2004
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This file basically duplicates sungem_phy.{c,h} with different PHYs
+ * supported. I'm looking into merging that in a single mii layer more
+ * flexible than mii.c
+ */
+
+#ifndef __IBM_NEWEMAC_PHY_H
+#define __IBM_NEWEMAC_PHY_H
+
+struct mii_phy;
+
+/* Operations supported by any kind of PHY */
+struct mii_phy_ops {
+ int (*init) (struct mii_phy * phy);
+ int (*suspend) (struct mii_phy * phy, int wol_options);
+ int (*setup_aneg) (struct mii_phy * phy, u32 advertise);
+ int (*setup_forced) (struct mii_phy * phy, int speed, int fd);
+ int (*poll_link) (struct mii_phy * phy);
+ int (*read_link) (struct mii_phy * phy);
+};
+
+/* Structure used to statically define an mii/gii based PHY */
+struct mii_phy_def {
+ u32 phy_id; /* Concatenated ID1 << 16 | ID2 */
+ u32 phy_id_mask; /* Significant bits */
+ u32 features; /* Ethtool SUPPORTED_* defines or
+ 0 for autodetect */
+ int magic_aneg; /* Autoneg does all speed test for us */
+ const char *name;
+ const struct mii_phy_ops *ops;
+};
+
+/* An instance of a PHY, partially borrowed from mii_if_info */
+struct mii_phy {
+ struct mii_phy_def *def;
+ u32 advertising; /* Ethtool ADVERTISED_* defines */
+ u32 features; /* Copied from mii_phy_def.features
+ or determined automaticaly */
+ int address; /* PHY address */
+ int mode; /* PHY mode */
+
+ /* 1: autoneg enabled, 0: disabled */
+ int autoneg;
+
+ /* forced speed & duplex (no autoneg)
+ * partner speed & duplex & pause (autoneg)
+ */
+ int speed;
+ int duplex;
+ int pause;
+ int asym_pause;
+
+ /* Provided by host chip */
+ struct net_device *dev;
+ int (*mdio_read) (struct net_device * dev, int addr, int reg);
+ void (*mdio_write) (struct net_device * dev, int addr, int reg,
+ int val);
+};
+
+/* Pass in a struct mii_phy with dev, mdio_read and mdio_write
+ * filled, the remaining fields will be filled on return
+ */
+int emac_mii_phy_probe(struct mii_phy *phy, int address);
+int emac_mii_reset_phy(struct mii_phy *phy);
+
+#endif /* __IBM_NEWEMAC_PHY_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/rgmii.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Matt Porter <mporter@kernel.crashing.org>
+ * Copyright 2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/ethtool.h>
+#include <asm/io.h>
+
+#include "emac.h"
+#include "debug.h"
+
+// XXX FIXME: Axon seems to support a subset of the RGMII, we
+// thus need to take that into account and possibly change some
+// of the bit settings below that don't seem to quite match the
+// AXON spec
+
+/* RGMIIx_FER */
+#define RGMII_FER_MASK(idx) (0x7 << ((idx) * 4))
+#define RGMII_FER_RTBI(idx) (0x4 << ((idx) * 4))
+#define RGMII_FER_RGMII(idx) (0x5 << ((idx) * 4))
+#define RGMII_FER_TBI(idx) (0x6 << ((idx) * 4))
+#define RGMII_FER_GMII(idx) (0x7 << ((idx) * 4))
+
+/* RGMIIx_SSR */
+#define RGMII_SSR_MASK(idx) (0x7 << ((idx) * 8))
+#define RGMII_SSR_100(idx) (0x2 << ((idx) * 8))
+#define RGMII_SSR_1000(idx) (0x4 << ((idx) * 8))
+
+/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
+static inline int rgmii_valid_mode(int phy_mode)
+{
+ return phy_mode == PHY_MODE_GMII ||
+ phy_mode == PHY_MODE_RGMII ||
+ phy_mode == PHY_MODE_TBI ||
+ phy_mode == PHY_MODE_RTBI;
+}
+
+static inline const char *rgmii_mode_name(int mode)
+{
+ switch (mode) {
+ case PHY_MODE_RGMII:
+ return "RGMII";
+ case PHY_MODE_TBI:
+ return "TBI";
+ case PHY_MODE_GMII:
+ return "GMII";
+ case PHY_MODE_RTBI:
+ return "RTBI";
+ default:
+ BUG();
+ }
+}
+
+static inline u32 rgmii_mode_mask(int mode, int input)
+{
+ switch (mode) {
+ case PHY_MODE_RGMII:
+ return RGMII_FER_RGMII(input);
+ case PHY_MODE_TBI:
+ return RGMII_FER_TBI(input);
+ case PHY_MODE_GMII:
+ return RGMII_FER_GMII(input);
+ case PHY_MODE_RTBI:
+ return RGMII_FER_RTBI(input);
+ default:
+ BUG();
+ }
+}
+
+int __devinit rgmii_attach(struct of_device *ofdev, int input, int mode)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct rgmii_regs *p = dev->base;
+
+ RGMII_DBG(dev, "attach(%d)" NL, input);
+
+ /* Check if we need to attach to a RGMII */
+ if (input < 0 || !rgmii_valid_mode(mode)) {
+ printk(KERN_ERR "%s: unsupported settings !\n",
+ ofdev->node->full_name);
+ return -ENODEV;
+ }
+
+ mutex_lock(&dev->lock);
+
+ /* Enable this input */
+ out_be32(&p->fer, in_be32(&p->fer) | rgmii_mode_mask(mode, input));
+
+ printk(KERN_NOTICE "%s: input %d in %s mode\n",
+ ofdev->node->full_name, input, rgmii_mode_name(mode));
+
+ ++dev->users;
+
+ mutex_unlock(&dev->lock);
+
+ return 0;
+}
+
+void rgmii_set_speed(struct of_device *ofdev, int input, int speed)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct rgmii_regs *p = dev->base;
+ u32 ssr;
+
+ mutex_lock(&dev->lock);
+
+ ssr = in_be32(&p->ssr) & ~RGMII_SSR_MASK(input);
+
+ RGMII_DBG(dev, "speed(%d, %d)" NL, input, speed);
+
+ if (speed == SPEED_1000)
+ ssr |= RGMII_SSR_1000(input);
+ else if (speed == SPEED_100)
+ ssr |= RGMII_SSR_100(input);
+
+ out_be32(&p->ssr, ssr);
+
+ mutex_unlock(&dev->lock);
+}
+
+void rgmii_get_mdio(struct of_device *ofdev, int input)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct rgmii_regs *p = dev->base;
+ u32 fer;
+
+ RGMII_DBG2(dev, "get_mdio(%d)" NL, input);
+
+ if (dev->type != RGMII_AXON)
+ return;
+
+ mutex_lock(&dev->lock);
+
+ fer = in_be32(&p->fer);
+ fer |= 0x00080000u >> input;
+ out_be32(&p->fer, fer);
+ (void)in_be32(&p->fer);
+
+ DBG2(dev, " fer = 0x%08x\n", fer);
+}
+
+void rgmii_put_mdio(struct of_device *ofdev, int input)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct rgmii_regs *p = dev->base;
+ u32 fer;
+
+ RGMII_DBG2(dev, "put_mdio(%d)" NL, input);
+
+ if (dev->type != RGMII_AXON)
+ return;
+
+ fer = in_be32(&p->fer);
+ fer &= ~(0x00080000u >> input);
+ out_be32(&p->fer, fer);
+ (void)in_be32(&p->fer);
+
+ DBG2(dev, " fer = 0x%08x\n", fer);
+
+ mutex_unlock(&dev->lock);
+}
+
+void __devexit rgmii_detach(struct of_device *ofdev, int input)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct rgmii_regs *p = dev->base;
+
+ mutex_lock(&dev->lock);
+
+ BUG_ON(!dev || dev->users == 0);
+
+ RGMII_DBG(dev, "detach(%d)" NL, input);
+
+ /* Disable this input */
+ out_be32(&p->fer, in_be32(&p->fer) & ~RGMII_FER_MASK(input));
+
+ --dev->users;
+
+ mutex_unlock(&dev->lock);
+}
+
+int rgmii_get_regs_len(struct of_device *ofdev)
+{
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ sizeof(struct rgmii_regs);
+}
+
+void *rgmii_dump_regs(struct of_device *ofdev, void *buf)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+ struct rgmii_regs *regs = (struct rgmii_regs *)(hdr + 1);
+
+ hdr->version = 0;
+ hdr->index = 0; /* for now, are there chips with more than one
+ * rgmii ? if yes, then we'll add a cell_index
+ * like we do for emac
+ */
+ memcpy_fromio(regs, dev->base, sizeof(struct rgmii_regs));
+ return regs + 1;
+}
+
+
+static int __devinit rgmii_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = ofdev->node;
+ struct rgmii_instance *dev;
+ struct resource regs;
+ int rc;
+
+ rc = -ENOMEM;
+ dev = kzalloc(sizeof(struct rgmii_instance), GFP_KERNEL);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s: could not allocate RGMII device!\n",
+ np->full_name);
+ goto err_gone;
+ }
+
+ mutex_init(&dev->lock);
+ dev->ofdev = ofdev;
+
+ rc = -ENXIO;
+ if (of_address_to_resource(np, 0, ®s)) {
+ printk(KERN_ERR "%s: Can't get registers address\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ rc = -ENOMEM;
+ dev->base = (struct rgmii_regs *)ioremap(regs.start,
+ sizeof(struct rgmii_regs));
+ if (dev->base == NULL) {
+ printk(KERN_ERR "%s: Can't map device registers!\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ /* Check for RGMII type */
+ if (device_is_compatible(ofdev->node, "ibm,rgmii-axon"))
+ dev->type = RGMII_AXON;
+ else
+ dev->type = RGMII_STANDARD;
+
+ DBG2(dev, " Boot FER = 0x%08x, SSR = 0x%08x\n",
+ in_be32(&dev->base->fer), in_be32(&dev->base->ssr));
+
+ /* Disable all inputs by default */
+ out_be32(&dev->base->fer, 0);
+
+ printk(KERN_INFO
+ "RGMII %s %s initialized\n",
+ dev->type == RGMII_STANDARD ? "standard" : "axon",
+ ofdev->node->full_name);
+
+ wmb();
+ dev_set_drvdata(&ofdev->dev, dev);
+
+ return 0;
+
+ err_free:
+ kfree(dev);
+ err_gone:
+ return rc;
+}
+
+static int __devexit rgmii_remove(struct of_device *ofdev)
+{
+ struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ WARN_ON(dev->users != 0);
+
+ iounmap(dev->base);
+ kfree(dev);
+
+ return 0;
+}
+
+static struct of_device_id rgmii_match[] =
+{
+ {
+ .type = "rgmii-interface",
+ .compatible = "ibm,rgmii",
+ },
+ {
+ .type = "emac-rgmii",
+ },
+ {},
+};
+
+static struct of_platform_driver rgmii_driver = {
+ .name = "emac-rgmii",
+ .match_table = rgmii_match,
+
+ .probe = rgmii_probe,
+ .remove = rgmii_remove,
+};
+
+int __init rgmii_init(void)
+{
+ return of_register_platform_driver(&rgmii_driver);
+}
+
+void rgmii_exit(void)
+{
+ of_unregister_platform_driver(&rgmii_driver);
+}
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/rgmii.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
+ *
+ * Based on ocp_zmii.h/ibm_emac_zmii.h
+ * Armin Kuster akuster@mvista.com
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __IBM_NEWEMAC_RGMII_H
+#define __IBM_NEWEMAC_RGMII_H
+
+/* RGMII bridge type */
+#define RGMII_STANDARD 0
+#define RGMII_AXON 1
+
+/* RGMII bridge */
+struct rgmii_regs {
+ u32 fer; /* Function enable register */
+ u32 ssr; /* Speed select register */
+};
+
+/* RGMII device */
+struct rgmii_instance {
+ struct rgmii_regs __iomem *base;
+
+ /* Type of RGMII bridge */
+ int type;
+
+ /* Only one EMAC whacks us at a time */
+ struct mutex lock;
+
+ /* number of EMACs using this RGMII bridge */
+ int users;
+
+ /* OF device instance */
+ struct of_device *ofdev;
+};
+
+#ifdef CONFIG_IBM_NEW_EMAC_RGMII
+
+extern int rgmii_init(void);
+extern void rgmii_exit(void);
+extern int rgmii_attach(struct of_device *ofdev, int input, int mode);
+extern void rgmii_detach(struct of_device *ofdev, int input);
+extern void rgmii_get_mdio(struct of_device *ofdev, int input);
+extern void rgmii_put_mdio(struct of_device *ofdev, int input);
+extern void rgmii_set_speed(struct of_device *ofdev, int input, int speed);
+extern int rgmii_get_regs_len(struct of_device *ofdev);
+extern void *rgmii_dump_regs(struct of_device *ofdev, void *buf);
+
+#else
+
+# define rgmii_init() 0
+# define rgmii_exit() do { } while(0)
+# define rgmii_attach(x,y,z) (-ENXIO)
+# define rgmii_detach(x,y) do { } while(0)
+# define rgmii_get_mdio(o,i) do { } while (0)
+# define rgmii_put_mdio(o,i) do { } while (0)
+# define rgmii_set_speed(x,y,z) do { } while(0)
+# define rgmii_get_regs_len(x) 0
+# define rgmii_dump_regs(x,buf) (buf)
+#endif /* !CONFIG_IBM_NEW_EMAC_RGMII */
+
+#endif /* __IBM_NEWEMAC_RGMII_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/tah.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <asm/io.h>
+
+#include "emac.h"
+#include "core.h"
+
+int __devinit tah_attach(struct of_device *ofdev, int channel)
+{
+ struct tah_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ mutex_lock(&dev->lock);
+ /* Reset has been done at probe() time... nothing else to do for now */
+ ++dev->users;
+ mutex_unlock(&dev->lock);
+
+ return 0;
+}
+
+void __devexit tah_detach(struct of_device *ofdev, int channel)
+{
+ struct tah_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ mutex_lock(&dev->lock);
+ --dev->users;
+ mutex_unlock(&dev->lock);
+}
+
+void tah_reset(struct of_device *ofdev)
+{
+ struct tah_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct tah_regs *p = dev->base;
+ int n;
+
+ /* Reset TAH */
+ out_be32(&p->mr, TAH_MR_SR);
+ n = 100;
+ while ((in_be32(&p->mr) & TAH_MR_SR) && n)
+ --n;
+
+ if (unlikely(!n))
+ printk(KERN_ERR "%s: reset timeout\n", ofdev->node->full_name);
+
+ /* 10KB TAH TX FIFO accomodates the max MTU of 9000 */
+ out_be32(&p->mr,
+ TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP |
+ TAH_MR_DIG);
+}
+
+int tah_get_regs_len(struct of_device *ofdev)
+{
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ sizeof(struct tah_regs);
+}
+
+void *tah_dump_regs(struct of_device *ofdev, void *buf)
+{
+ struct tah_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+ struct tah_regs *regs = (struct tah_regs *)(hdr + 1);
+
+ hdr->version = 0;
+ hdr->index = 0; /* for now, are there chips with more than one
+ * zmii ? if yes, then we'll add a cell_index
+ * like we do for emac
+ */
+ memcpy_fromio(regs, dev->base, sizeof(struct tah_regs));
+ return regs + 1;
+}
+
+static int __devinit tah_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = ofdev->node;
+ struct tah_instance *dev;
+ struct resource regs;
+ int rc;
+
+ rc = -ENOMEM;
+ dev = kzalloc(sizeof(struct tah_instance), GFP_KERNEL);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s: could not allocate TAH device!\n",
+ np->full_name);
+ goto err_gone;
+ }
+
+ mutex_init(&dev->lock);
+ dev->ofdev = ofdev;
+
+ rc = -ENXIO;
+ if (of_address_to_resource(np, 0, ®s)) {
+ printk(KERN_ERR "%s: Can't get registers address\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ rc = -ENOMEM;
+ dev->base = (struct tah_regs *)ioremap(regs.start,
+ sizeof(struct tah_regs));
+ if (dev->base == NULL) {
+ printk(KERN_ERR "%s: Can't map device registers!\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ /* Initialize TAH and enable IPv4 checksum verification, no TSO yet */
+ tah_reset(ofdev);
+
+ printk(KERN_INFO
+ "TAH %s initialized\n", ofdev->node->full_name);
+ wmb();
+ dev_set_drvdata(&ofdev->dev, dev);
+
+ return 0;
+
+ err_free:
+ kfree(dev);
+ err_gone:
+ return rc;
+}
+
+static int __devexit tah_remove(struct of_device *ofdev)
+{
+ struct tah_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ WARN_ON(dev->users != 0);
+
+ iounmap(dev->base);
+ kfree(dev);
+
+ return 0;
+}
+
+static struct of_device_id tah_match[] =
+{
+ {
+ .type = "tah",
+ },
+ {},
+};
+
+static struct of_platform_driver tah_driver = {
+ .name = "emac-tah",
+ .match_table = tah_match,
+
+ .probe = tah_probe,
+ .remove = tah_remove,
+};
+
+int __init tah_init(void)
+{
+ return of_register_platform_driver(&tah_driver);
+}
+
+void tah_exit(void)
+{
+ of_unregister_platform_driver(&tah_driver);
+}
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/tah.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __IBM_NEWEMAC_TAH_H
+#define __IBM_NEWEMAC_TAH_H
+
+/* TAH */
+struct tah_regs {
+ u32 revid;
+ u32 pad[3];
+ u32 mr;
+ u32 ssr0;
+ u32 ssr1;
+ u32 ssr2;
+ u32 ssr3;
+ u32 ssr4;
+ u32 ssr5;
+ u32 tsr;
+};
+
+
+/* TAH device */
+struct tah_instance {
+ struct tah_regs __iomem *base;
+
+ /* Only one EMAC whacks us at a time */
+ struct mutex lock;
+
+ /* number of EMACs using this TAH */
+ int users;
+
+ /* OF device instance */
+ struct of_device *ofdev;
+};
+
+
+/* TAH engine */
+#define TAH_MR_CVR 0x80000000
+#define TAH_MR_SR 0x40000000
+#define TAH_MR_ST_256 0x01000000
+#define TAH_MR_ST_512 0x02000000
+#define TAH_MR_ST_768 0x03000000
+#define TAH_MR_ST_1024 0x04000000
+#define TAH_MR_ST_1280 0x05000000
+#define TAH_MR_ST_1536 0x06000000
+#define TAH_MR_TFS_16KB 0x00000000
+#define TAH_MR_TFS_2KB 0x00200000
+#define TAH_MR_TFS_4KB 0x00400000
+#define TAH_MR_TFS_6KB 0x00600000
+#define TAH_MR_TFS_8KB 0x00800000
+#define TAH_MR_TFS_10KB 0x00a00000
+#define TAH_MR_DTFP 0x00100000
+#define TAH_MR_DIG 0x00080000
+
+#ifdef CONFIG_IBM_NEW_EMAC_TAH
+
+extern int tah_init(void);
+extern void tah_exit(void);
+extern int tah_attach(struct of_device *ofdev, int channel);
+extern void tah_detach(struct of_device *ofdev, int channel);
+extern void tah_reset(struct of_device *ofdev);
+extern int tah_get_regs_len(struct of_device *ofdev);
+extern void *tah_dump_regs(struct of_device *ofdev, void *buf);
+
+#else
+
+# define tah_init() 0
+# define tah_exit() do { } while(0)
+# define tah_attach(x,y) (-ENXIO)
+# define tah_detach(x,y) do { } while(0)
+# define tah_reset(x) do { } while(0)
+# define tah_get_regs_len(x) 0
+# define tah_dump_regs(x,buf) (buf)
+
+#endif /* !CONFIG_IBM_NEW_EMAC_TAH */
+
+#endif /* __IBM_NEWEMAC_TAH_H */
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/zmii.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Armin Kuster <akuster@mvista.com>
+ * Copyright 2001 MontaVista Softare Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/ethtool.h>
+#include <asm/io.h>
+
+#include "emac.h"
+#include "core.h"
+
+/* ZMIIx_FER */
+#define ZMII_FER_MDI(idx) (0x80000000 >> ((idx) * 4))
+#define ZMII_FER_MDI_ALL (ZMII_FER_MDI(0) | ZMII_FER_MDI(1) | \
+ ZMII_FER_MDI(2) | ZMII_FER_MDI(3))
+
+#define ZMII_FER_SMII(idx) (0x40000000 >> ((idx) * 4))
+#define ZMII_FER_RMII(idx) (0x20000000 >> ((idx) * 4))
+#define ZMII_FER_MII(idx) (0x10000000 >> ((idx) * 4))
+
+/* ZMIIx_SSR */
+#define ZMII_SSR_SCI(idx) (0x40000000 >> ((idx) * 4))
+#define ZMII_SSR_FSS(idx) (0x20000000 >> ((idx) * 4))
+#define ZMII_SSR_SP(idx) (0x10000000 >> ((idx) * 4))
+
+/* ZMII only supports MII, RMII and SMII
+ * we also support autodetection for backward compatibility
+ */
+static inline int zmii_valid_mode(int mode)
+{
+ return mode == PHY_MODE_MII ||
+ mode == PHY_MODE_RMII ||
+ mode == PHY_MODE_SMII ||
+ mode == PHY_MODE_NA;
+}
+
+static inline const char *zmii_mode_name(int mode)
+{
+ switch (mode) {
+ case PHY_MODE_MII:
+ return "MII";
+ case PHY_MODE_RMII:
+ return "RMII";
+ case PHY_MODE_SMII:
+ return "SMII";
+ default:
+ BUG();
+ }
+}
+
+static inline u32 zmii_mode_mask(int mode, int input)
+{
+ switch (mode) {
+ case PHY_MODE_MII:
+ return ZMII_FER_MII(input);
+ case PHY_MODE_RMII:
+ return ZMII_FER_RMII(input);
+ case PHY_MODE_SMII:
+ return ZMII_FER_SMII(input);
+ default:
+ return 0;
+ }
+}
+
+int __devinit zmii_attach(struct of_device *ofdev, int input, int *mode)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct zmii_regs *p = dev->base;
+
+ ZMII_DBG(dev, "init(%d, %d)" NL, input, *mode);
+
+ if (!zmii_valid_mode(*mode))
+ /* Probably an EMAC connected to RGMII,
+ * but it still may need ZMII for MDIO so
+ * we don't fail here.
+ */
+ return 0;
+
+ mutex_lock(&dev->lock);
+
+ /* Autodetect ZMII mode if not specified.
+ * This is only for backward compatibility with the old driver.
+ * Please, always specify PHY mode in your board port to avoid
+ * any surprises.
+ */
+ if (dev->mode == PHY_MODE_NA) {
+ if (*mode == PHY_MODE_NA) {
+ u32 r = dev->fer_save;
+
+ ZMII_DBG(dev, "autodetecting mode, FER = 0x%08x" NL, r);
+
+ if (r & (ZMII_FER_MII(0) | ZMII_FER_MII(1)))
+ dev->mode = PHY_MODE_MII;
+ else if (r & (ZMII_FER_RMII(0) | ZMII_FER_RMII(1)))
+ dev->mode = PHY_MODE_RMII;
+ else
+ dev->mode = PHY_MODE_SMII;
+ } else
+ dev->mode = *mode;
+
+ printk(KERN_NOTICE "%s: bridge in %s mode\n",
+ ofdev->node->full_name, zmii_mode_name(dev->mode));
+ } else {
+ /* All inputs must use the same mode */
+ if (*mode != PHY_MODE_NA && *mode != dev->mode) {
+ printk(KERN_ERR
+ "%s: invalid mode %d specified for input %d\n",
+ ofdev->node->full_name, *mode, input);
+ mutex_unlock(&dev->lock);
+ return -EINVAL;
+ }
+ }
+
+ /* Report back correct PHY mode,
+ * it may be used during PHY initialization.
+ */
+ *mode = dev->mode;
+
+ /* Enable this input */
+ out_be32(&p->fer, in_be32(&p->fer) | zmii_mode_mask(dev->mode, input));
+ ++dev->users;
+
+ mutex_unlock(&dev->lock);
+
+ return 0;
+}
+
+void zmii_get_mdio(struct of_device *ofdev, int input)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ u32 fer;
+
+ ZMII_DBG2(dev, "get_mdio(%d)" NL, input);
+
+ mutex_lock(&dev->lock);
+
+ fer = in_be32(&dev->base->fer) & ~ZMII_FER_MDI_ALL;
+ out_be32(&dev->base->fer, fer | ZMII_FER_MDI(input));
+}
+
+void zmii_put_mdio(struct of_device *ofdev, int input)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ ZMII_DBG2(dev, "put_mdio(%d)" NL, input);
+ mutex_unlock(&dev->lock);
+}
+
+
+void zmii_set_speed(struct of_device *ofdev, int input, int speed)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ u32 ssr;
+
+ mutex_lock(&dev->lock);
+
+ ssr = in_be32(&dev->base->ssr);
+
+ ZMII_DBG(dev, "speed(%d, %d)" NL, input, speed);
+
+ if (speed == SPEED_100)
+ ssr |= ZMII_SSR_SP(input);
+ else
+ ssr &= ~ZMII_SSR_SP(input);
+
+ out_be32(&dev->base->ssr, ssr);
+
+ mutex_unlock(&dev->lock);
+}
+
+void __devexit zmii_detach(struct of_device *ofdev, int input)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ BUG_ON(!dev || dev->users == 0);
+
+ mutex_lock(&dev->lock);
+
+ ZMII_DBG(dev, "detach(%d)" NL, input);
+
+ /* Disable this input */
+ out_be32(&dev->base->fer,
+ in_be32(&dev->base->fer) & ~zmii_mode_mask(dev->mode, input));
+
+ --dev->users;
+
+ mutex_unlock(&dev->lock);
+}
+
+int zmii_get_regs_len(struct of_device *ofdev)
+{
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ sizeof(struct zmii_regs);
+}
+
+void *zmii_dump_regs(struct of_device *ofdev, void *buf)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+ struct zmii_regs *regs = (struct zmii_regs *)(hdr + 1);
+
+ hdr->version = 0;
+ hdr->index = 0; /* for now, are there chips with more than one
+ * zmii ? if yes, then we'll add a cell_index
+ * like we do for emac
+ */
+ memcpy_fromio(regs, dev->base, sizeof(struct zmii_regs));
+ return regs + 1;
+}
+
+static int __devinit zmii_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = ofdev->node;
+ struct zmii_instance *dev;
+ struct resource regs;
+ int rc;
+
+ rc = -ENOMEM;
+ dev = kzalloc(sizeof(struct zmii_instance), GFP_KERNEL);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s: could not allocate ZMII device!\n",
+ np->full_name);
+ goto err_gone;
+ }
+
+ mutex_init(&dev->lock);
+ dev->ofdev = ofdev;
+ dev->mode = PHY_MODE_NA;
+
+ rc = -ENXIO;
+ if (of_address_to_resource(np, 0, ®s)) {
+ printk(KERN_ERR "%s: Can't get registers address\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ rc = -ENOMEM;
+ dev->base = (struct zmii_regs *)ioremap(regs.start,
+ sizeof(struct zmii_regs));
+ if (dev->base == NULL) {
+ printk(KERN_ERR "%s: Can't map device registers!\n",
+ np->full_name);
+ goto err_free;
+ }
+
+ /* We may need FER value for autodetection later */
+ dev->fer_save = in_be32(&dev->base->fer);
+
+ /* Disable all inputs by default */
+ out_be32(&dev->base->fer, 0);
+
+ printk(KERN_INFO
+ "ZMII %s initialized\n", ofdev->node->full_name);
+ wmb();
+ dev_set_drvdata(&ofdev->dev, dev);
+
+ return 0;
+
+ err_free:
+ kfree(dev);
+ err_gone:
+ return rc;
+}
+
+static int __devexit zmii_remove(struct of_device *ofdev)
+{
+ struct zmii_instance *dev = dev_get_drvdata(&ofdev->dev);
+
+ dev_set_drvdata(&ofdev->dev, NULL);
+
+ WARN_ON(dev->users != 0);
+
+ iounmap(dev->base);
+ kfree(dev);
+
+ return 0;
+}
+
+static struct of_device_id zmii_match[] =
+{
+ {
+ .compatible = "ibm,zmii",
+ },
+ /* For backward compat with old DT */
+ {
+ .type = "emac-zmii",
+ },
+ {},
+};
+
+static struct of_platform_driver zmii_driver = {
+ .name = "emac-zmii",
+ .match_table = zmii_match,
+
+ .probe = zmii_probe,
+ .remove = zmii_remove,
+};
+
+int __init zmii_init(void)
+{
+ return of_register_platform_driver(&zmii_driver);
+}
+
+void zmii_exit(void)
+{
+ of_unregister_platform_driver(&zmii_driver);
+}
--- /dev/null
+/*
+ * drivers/net/ibm_newemac/zmii.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * Based on original work by
+ * Armin Kuster <akuster@mvista.com>
+ * Copyright 2001 MontaVista Softare Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __IBM_NEWEMAC_ZMII_H
+#define __IBM_NEWEMAC_ZMII_H
+
+/* ZMII bridge registers */
+struct zmii_regs {
+ u32 fer; /* Function enable reg */
+ u32 ssr; /* Speed select reg */
+ u32 smiirs; /* SMII status reg */
+};
+
+/* ZMII device */
+struct zmii_instance {
+ struct zmii_regs __iomem *base;
+
+ /* Only one EMAC whacks us at a time */
+ struct mutex lock;
+
+ /* subset of PHY_MODE_XXXX */
+ int mode;
+
+ /* number of EMACs using this ZMII bridge */
+ int users;
+
+ /* FER value left by firmware */
+ u32 fer_save;
+
+ /* OF device instance */
+ struct of_device *ofdev;
+};
+
+#ifdef CONFIG_IBM_NEW_EMAC_ZMII
+
+extern int zmii_init(void);
+extern void zmii_exit(void);
+extern int zmii_attach(struct of_device *ofdev, int input, int *mode);
+extern void zmii_detach(struct of_device *ofdev, int input);
+extern void zmii_get_mdio(struct of_device *ofdev, int input);
+extern void zmii_put_mdio(struct of_device *ofdev, int input);
+extern void zmii_set_speed(struct of_device *ofdev, int input, int speed);
+extern int zmii_get_regs_len(struct of_device *ocpdev);
+extern void *zmii_dump_regs(struct of_device *ofdev, void *buf);
+
+#else
+# define zmii_init() 0
+# define zmii_exit() do { } while(0)
+# define zmii_attach(x,y,z) (-ENXIO)
+# define zmii_detach(x,y) do { } while(0)
+# define zmii_get_mdio(x,y) do { } while(0)
+# define zmii_put_mdio(x,y) do { } while(0)
+# define zmii_set_speed(x,y,z) do { } while(0)
+# define zmii_get_regs_len(x) 0
+# define zmii_dump_regs(x,buf) (buf)
+#endif /* !CONFIG_IBM_NEW_EMAC_ZMII */
+
+#endif /* __IBM_NEWEMAC_ZMII_H */
projects / linux-2.6-omap-h63xx.git / commitdiff