2 * dm9000.c: Version 1.2 03/18/2003
4 * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
5 * Copyright (C) 1997 Sten Wang
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
19 * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
20 * 06/22/2001 Support DM9801 progrmming
21 * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
22 * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
23 * R17 = (R17 & 0xfff0) | NF + 3
24 * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
25 * R17 = (R17 & 0xfff0) | NF
27 * v1.00 modify by simon 2001.9.5
28 * change for kernel 2.4.x
30 * v1.1 11/09/2001 fix force mode bug
32 * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
34 * Added tx/rx 32 bit mode.
35 * Cleaned up for kernel merge.
37 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
41 * Cleanup of code to remove ifdefs
42 * Allowed platform device data to influence access width
43 * Reformatting areas of code
45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
46 * * removed 2.4 style module parameters
47 * * removed removed unused stat counter and fixed
49 * * introduced tx_timeout function
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
57 #include <linux/module.h>
58 #include <linux/ioport.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/init.h>
62 #include <linux/skbuff.h>
63 #include <linux/spinlock.h>
64 #include <linux/crc32.h>
65 #include <linux/mii.h>
66 #include <linux/ethtool.h>
67 #include <linux/dm9000.h>
68 #include <linux/delay.h>
69 #include <linux/platform_device.h>
70 #include <linux/irq.h>
72 #include <asm/delay.h>
78 /* Board/System/Debug information/definition ---------------- */
80 #define DM9000_PHY 0x40 /* PHY address 0x01 */
82 #define CARDNAME "dm9000"
83 #define PFX CARDNAME ": "
84 #define DRV_VERSION "1.30"
86 #ifdef CONFIG_BLACKFIN
93 #define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
95 #define DEFAULT_TRIGGER (0)
99 * Transmit timeout, default 5 seconds.
101 static int watchdog = 5000;
102 module_param(watchdog, int, 0400);
103 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
105 /* DM9000 register address locking.
107 * The DM9000 uses an address register to control where data written
108 * to the data register goes. This means that the address register
109 * must be preserved over interrupts or similar calls.
111 * During interrupt and other critical calls, a spinlock is used to
112 * protect the system, but the calls themselves save the address
113 * in the address register in case they are interrupting another
114 * access to the device.
116 * For general accesses a lock is provided so that calls which are
117 * allowed to sleep are serialised so that the address register does
118 * not need to be saved. This lock also serves to serialise access
119 * to the EEPROM and PHY access registers which are shared between
123 /* Structure/enum declaration ------------------------------- */
124 typedef struct board_info {
126 void __iomem *io_addr; /* Register I/O base address */
127 void __iomem *io_data; /* Data I/O address */
132 u16 queue_start_addr;
134 u8 io_mode; /* 0:word, 2:byte */
137 unsigned int in_suspend :1;
141 void (*inblk)(void __iomem *port, void *data, int length);
142 void (*outblk)(void __iomem *port, void *data, int length);
143 void (*dumpblk)(void __iomem *port, int length);
145 struct device *dev; /* parent device */
147 struct resource *addr_res; /* resources found */
148 struct resource *data_res;
149 struct resource *addr_req; /* resources requested */
150 struct resource *data_req;
151 struct resource *irq_res;
153 struct mutex addr_lock; /* phy and eeprom access lock */
157 struct mii_if_info mii;
163 #define dm9000_dbg(db, lev, msg...) do { \
164 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
165 (lev) < db->debug_level) { \
166 dev_dbg(db->dev, msg); \
170 static inline board_info_t *to_dm9000_board(struct net_device *dev)
175 /* function declaration ------------------------------------- */
176 static int dm9000_probe(struct platform_device *);
177 static int dm9000_open(struct net_device *);
178 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
179 static int dm9000_stop(struct net_device *);
181 static void dm9000_init_dm9000(struct net_device *);
183 static irqreturn_t dm9000_interrupt(int, void *);
185 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
186 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
189 static void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
190 static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
191 static void dm9000_rx(struct net_device *);
192 static void dm9000_hash_table(struct net_device *);
194 //#define DM9000_PROGRAM_EEPROM
195 #ifdef DM9000_PROGRAM_EEPROM
196 static void program_eeprom(board_info_t * db);
198 /* DM9000 network board routine ---------------------------- */
201 dm9000_reset(board_info_t * db)
203 dev_dbg(db->dev, "resetting device\n");
206 writeb(DM9000_NCR, db->io_addr);
208 writeb(NCR_RST, db->io_data);
213 * Read a byte from I/O port
216 ior(board_info_t * db, int reg)
218 writeb(reg, db->io_addr);
219 return readb(db->io_data);
223 * Write a byte to I/O port
227 iow(board_info_t * db, int reg, int value)
229 writeb(reg, db->io_addr);
230 writeb(value, db->io_data);
233 /* routines for sending block to chip */
235 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
237 writesb(reg, data, count);
240 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
242 writesw(reg, data, (count+1) >> 1);
245 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
247 writesl(reg, data, (count+3) >> 2);
250 /* input block from chip to memory */
252 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
254 readsb(reg, data, count);
258 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
260 readsw(reg, data, (count+1) >> 1);
263 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
265 readsl(reg, data, (count+3) >> 2);
268 /* dump block from chip to null */
270 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
275 for (i = 0; i < count; i++)
279 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
284 count = (count + 1) >> 1;
286 for (i = 0; i < count; i++)
290 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
295 count = (count + 3) >> 2;
297 for (i = 0; i < count; i++)
303 * select the specified set of io routines to use with the
307 static void dm9000_set_io(struct board_info *db, int byte_width)
309 /* use the size of the data resource to work out what IO
310 * routines we want to use
313 switch (byte_width) {
315 db->dumpblk = dm9000_dumpblk_8bit;
316 db->outblk = dm9000_outblk_8bit;
317 db->inblk = dm9000_inblk_8bit;
322 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
324 db->dumpblk = dm9000_dumpblk_16bit;
325 db->outblk = dm9000_outblk_16bit;
326 db->inblk = dm9000_inblk_16bit;
331 db->dumpblk = dm9000_dumpblk_32bit;
332 db->outblk = dm9000_outblk_32bit;
333 db->inblk = dm9000_inblk_32bit;
339 /* Our watchdog timed out. Called by the networking layer */
340 static void dm9000_timeout(struct net_device *dev)
342 board_info_t *db = (board_info_t *) dev->priv;
346 /* Save previous register address */
347 reg_save = readb(db->io_addr);
348 spin_lock_irqsave(&db->lock,flags);
350 netif_stop_queue(dev);
352 dm9000_init_dm9000(dev);
353 /* We can accept TX packets again */
354 dev->trans_start = jiffies;
355 netif_wake_queue(dev);
357 /* Restore previous register address */
358 writeb(reg_save, db->io_addr);
359 spin_unlock_irqrestore(&db->lock,flags);
362 #ifdef CONFIG_NET_POLL_CONTROLLER
366 static void dm9000_poll_controller(struct net_device *dev)
368 disable_irq(dev->irq);
369 dm9000_interrupt(dev->irq,dev);
370 enable_irq(dev->irq);
376 static void dm9000_get_drvinfo(struct net_device *dev,
377 struct ethtool_drvinfo *info)
379 board_info_t *dm = to_dm9000_board(dev);
381 strcpy(info->driver, CARDNAME);
382 strcpy(info->version, DRV_VERSION);
383 strcpy(info->bus_info, to_platform_device(dm->dev)->name);
386 static u32 dm9000_get_msglevel(struct net_device *dev)
388 board_info_t *dm = to_dm9000_board(dev);
390 return dm->msg_enable;
393 static void dm9000_set_msglevel(struct net_device *dev, u32 value)
395 board_info_t *dm = to_dm9000_board(dev);
397 dm->msg_enable = value;
400 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
402 board_info_t *dm = to_dm9000_board(dev);
404 mii_ethtool_gset(&dm->mii, cmd);
408 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
410 board_info_t *dm = to_dm9000_board(dev);
412 return mii_ethtool_sset(&dm->mii, cmd);
415 static int dm9000_nway_reset(struct net_device *dev)
417 board_info_t *dm = to_dm9000_board(dev);
418 return mii_nway_restart(&dm->mii);
421 static u32 dm9000_get_link(struct net_device *dev)
423 board_info_t *dm = to_dm9000_board(dev);
424 return mii_link_ok(&dm->mii);
427 #define DM_EEPROM_MAGIC (0x444D394B)
429 static int dm9000_get_eeprom_len(struct net_device *dev)
434 static int dm9000_get_eeprom(struct net_device *dev,
435 struct ethtool_eeprom *ee, u8 *data)
437 board_info_t *dm = to_dm9000_board(dev);
438 int offset = ee->offset;
442 /* EEPROM access is aligned to two bytes */
444 if ((len & 1) != 0 || (offset & 1) != 0)
447 ee->magic = DM_EEPROM_MAGIC;
449 for (i = 0; i < len; i += 2)
450 dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
455 static int dm9000_set_eeprom(struct net_device *dev,
456 struct ethtool_eeprom *ee, u8 *data)
458 board_info_t *dm = to_dm9000_board(dev);
459 int offset = ee->offset;
463 /* EEPROM access is aligned to two bytes */
465 if ((len & 1) != 0 || (offset & 1) != 0)
468 if (ee->magic != DM_EEPROM_MAGIC)
471 for (i = 0; i < len; i += 2)
472 dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
477 static const struct ethtool_ops dm9000_ethtool_ops = {
478 .get_drvinfo = dm9000_get_drvinfo,
479 .get_settings = dm9000_get_settings,
480 .set_settings = dm9000_set_settings,
481 .get_msglevel = dm9000_get_msglevel,
482 .set_msglevel = dm9000_set_msglevel,
483 .nway_reset = dm9000_nway_reset,
484 .get_link = dm9000_get_link,
485 .get_eeprom_len = dm9000_get_eeprom_len,
486 .get_eeprom = dm9000_get_eeprom,
487 .set_eeprom = dm9000_set_eeprom,
491 /* dm9000_release_board
493 * release a board, and any mapped resources
497 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
499 if (db->data_res == NULL) {
500 if (db->addr_res != NULL)
501 release_mem_region((unsigned long)db->io_addr, 4);
505 /* unmap our resources */
507 iounmap(db->io_addr);
508 iounmap(db->io_data);
510 /* release the resources */
512 if (db->data_req != NULL) {
513 release_resource(db->data_req);
517 if (db->addr_req != NULL) {
518 release_resource(db->addr_req);
523 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
526 * Search DM9000 board, allocate space and register it
529 dm9000_probe(struct platform_device *pdev)
531 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
532 struct board_info *db; /* Point a board information structure */
533 struct net_device *ndev;
540 /* Init network device */
541 ndev = alloc_etherdev(sizeof (struct board_info));
543 dev_err(&pdev->dev, "could not allocate device.\n");
547 SET_NETDEV_DEV(ndev, &pdev->dev);
549 dev_dbg(&pdev->dev, "dm9000_probe()");
551 /* setup board info structure */
552 db = (struct board_info *) ndev->priv;
553 memset(db, 0, sizeof (*db));
555 db->dev = &pdev->dev;
557 spin_lock_init(&db->lock);
558 mutex_init(&db->addr_lock);
560 if (pdev->num_resources < 2) {
563 } else if (pdev->num_resources == 2) {
564 base = pdev->resource[0].start;
566 if (!request_mem_region(base, 4, ndev->name)) {
571 ndev->base_addr = base;
572 ndev->irq = pdev->resource[1].start;
573 db->io_addr = (void __iomem *)base;
574 db->io_data = (void __iomem *)(base + 4);
576 /* ensure at least we have a default set of IO routines */
577 dm9000_set_io(db, 2);
580 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
581 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
582 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
584 if (db->addr_res == NULL || db->data_res == NULL ||
585 db->irq_res == NULL) {
586 dev_err(db->dev, "insufficient resources\n");
591 i = res_size(db->addr_res);
592 db->addr_req = request_mem_region(db->addr_res->start, i,
595 if (db->addr_req == NULL) {
596 dev_err(db->dev, "cannot claim address reg area\n");
601 db->io_addr = ioremap(db->addr_res->start, i);
603 if (db->io_addr == NULL) {
604 dev_err(db->dev, "failed to ioremap address reg\n");
609 iosize = res_size(db->data_res);
610 db->data_req = request_mem_region(db->data_res->start, iosize,
613 if (db->data_req == NULL) {
614 dev_err(db->dev, "cannot claim data reg area\n");
619 db->io_data = ioremap(db->data_res->start, iosize);
621 if (db->io_data == NULL) {
622 dev_err(db->dev,"failed to ioremap data reg\n");
627 /* fill in parameters for net-dev structure */
629 ndev->base_addr = (unsigned long)db->io_addr;
630 ndev->irq = db->irq_res->start;
632 /* ensure at least we have a default set of IO routines */
633 dm9000_set_io(db, iosize);
636 /* check to see if anything is being over-ridden */
638 /* check to see if the driver wants to over-ride the
639 * default IO width */
641 if (pdata->flags & DM9000_PLATF_8BITONLY)
642 dm9000_set_io(db, 1);
644 if (pdata->flags & DM9000_PLATF_16BITONLY)
645 dm9000_set_io(db, 2);
647 if (pdata->flags & DM9000_PLATF_32BITONLY)
648 dm9000_set_io(db, 4);
650 /* check to see if there are any IO routine
653 if (pdata->inblk != NULL)
654 db->inblk = pdata->inblk;
656 if (pdata->outblk != NULL)
657 db->outblk = pdata->outblk;
659 if (pdata->dumpblk != NULL)
660 db->dumpblk = pdata->dumpblk;
662 db->flags = pdata->flags;
667 /* try two times, DM9000 sometimes gets the first read wrong */
668 for (i = 0; i < 2; i++) {
669 id_val = ior(db, DM9000_VIDL);
670 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
671 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
672 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
674 if (id_val == DM9000_ID)
676 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
679 if (id_val != DM9000_ID) {
680 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
685 /* from this point we assume that we have found a DM9000 */
687 /* driver system function */
690 ndev->open = &dm9000_open;
691 ndev->hard_start_xmit = &dm9000_start_xmit;
692 ndev->tx_timeout = &dm9000_timeout;
693 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
694 ndev->stop = &dm9000_stop;
695 ndev->set_multicast_list = &dm9000_hash_table;
696 ndev->ethtool_ops = &dm9000_ethtool_ops;
698 #ifdef CONFIG_NET_POLL_CONTROLLER
699 ndev->poll_controller = &dm9000_poll_controller;
702 #ifdef DM9000_PROGRAM_EEPROM
705 db->msg_enable = NETIF_MSG_LINK;
706 db->mii.phy_id_mask = 0x1f;
707 db->mii.reg_num_mask = 0x1f;
708 db->mii.force_media = 0;
709 db->mii.full_duplex = 0;
711 db->mii.mdio_read = dm9000_phy_read;
712 db->mii.mdio_write = dm9000_phy_write;
714 /* try reading the node address from the attached EEPROM */
715 for (i = 0; i < 6; i += 2)
716 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
718 if (!is_valid_ether_addr(ndev->dev_addr)) {
719 /* try reading from mac */
721 for (i = 0; i < 6; i++)
722 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
725 if (!is_valid_ether_addr(ndev->dev_addr))
726 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
727 "set using ifconfig\n", ndev->name);
729 platform_set_drvdata(pdev, ndev);
730 ret = register_netdev(ndev);
733 DECLARE_MAC_BUF(mac);
734 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
735 ndev->name, db->io_addr, db->io_data, ndev->irq,
736 print_mac(mac, ndev->dev_addr));
741 dev_err(db->dev, "not found (%d).\n", ret);
743 dm9000_release_board(pdev, db);
750 * Open the interface.
751 * The interface is opened whenever "ifconfig" actives it.
754 dm9000_open(struct net_device *dev)
756 board_info_t *db = (board_info_t *) dev->priv;
757 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
759 dev_dbg(db->dev, "entering %s\n", __func__);
761 /* If there is no IRQ type specified, default to something that
762 * may work, and tell the user that this is a problem */
764 if (irqflags == IRQF_TRIGGER_NONE) {
765 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
766 irqflags = DEFAULT_TRIGGER;
769 irqflags |= IRQF_SHARED;
771 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
774 /* Initialize DM9000 board */
776 dm9000_init_dm9000(dev);
778 /* Init driver variable */
781 mii_check_media(&db->mii, netif_msg_link(db), 1);
782 netif_start_queue(dev);
788 * Initilize dm9000 board
791 dm9000_init_dm9000(struct net_device *dev)
793 board_info_t *db = (board_info_t *) dev->priv;
795 dm9000_dbg(db, 1, "entering %s\n", __func__);
798 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
800 /* GPIO0 on pre-activate PHY */
801 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
802 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
803 iow(db, DM9000_GPR, 0); /* Enable PHY */
805 if (db->flags & DM9000_PLATF_EXT_PHY)
806 iow(db, DM9000_NCR, NCR_EXT_PHY);
808 /* Program operating register */
809 iow(db, DM9000_TCR, 0); /* TX Polling clear */
810 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
811 iow(db, DM9000_FCR, 0xff); /* Flow Control */
812 iow(db, DM9000_SMCR, 0); /* Special Mode */
813 /* clear TX status */
814 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
815 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
817 /* Set address filter table */
818 dm9000_hash_table(dev);
820 /* Activate DM9000 */
821 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
822 /* Enable TX/RX interrupt mask */
823 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
825 /* Init Driver variable */
827 db->queue_pkt_len = 0;
828 dev->trans_start = 0;
832 * Hardware start transmission.
833 * Send a packet to media from the upper layer.
836 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
839 board_info_t *db = (board_info_t *) dev->priv;
841 dm9000_dbg(db, 3, "%s:\n", __func__);
843 if (db->tx_pkt_cnt > 1)
846 spin_lock_irqsave(&db->lock, flags);
848 /* Move data to DM9000 TX RAM */
849 writeb(DM9000_MWCMD, db->io_addr);
851 (db->outblk)(db->io_data, skb->data, skb->len);
852 dev->stats.tx_bytes += skb->len;
855 /* TX control: First packet immediately send, second packet queue */
856 if (db->tx_pkt_cnt == 1) {
857 /* Set TX length to DM9000 */
858 iow(db, DM9000_TXPLL, skb->len & 0xff);
859 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
861 /* Issue TX polling command */
862 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
864 dev->trans_start = jiffies; /* save the time stamp */
867 db->queue_pkt_len = skb->len;
868 netif_stop_queue(dev);
871 spin_unlock_irqrestore(&db->lock, flags);
880 dm9000_shutdown(struct net_device *dev)
882 board_info_t *db = (board_info_t *) dev->priv;
885 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
886 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
887 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
888 iow(db, DM9000_RCR, 0x00); /* Disable RX */
892 * Stop the interface.
893 * The interface is stopped when it is brought.
896 dm9000_stop(struct net_device *ndev)
898 board_info_t *db = (board_info_t *) ndev->priv;
900 dm9000_dbg(db, 1, "entering %s\n", __func__);
902 netif_stop_queue(ndev);
903 netif_carrier_off(ndev);
906 free_irq(ndev->irq, ndev);
908 dm9000_shutdown(ndev);
914 * DM9000 interrupt handler
915 * receive the packet to upper layer, free the transmitted packet
919 dm9000_tx_done(struct net_device *dev, board_info_t * db)
921 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
923 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
924 /* One packet sent complete */
926 dev->stats.tx_packets++;
928 /* Queue packet check & send */
929 if (db->tx_pkt_cnt > 0) {
930 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
931 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
932 iow(db, DM9000_TCR, TCR_TXREQ);
933 dev->trans_start = jiffies;
935 netif_wake_queue(dev);
940 dm9000_interrupt(int irq, void *dev_id)
942 struct net_device *dev = dev_id;
943 board_info_t *db = (board_info_t *) dev->priv;
947 dm9000_dbg(db, 3, "entering %s\n", __func__);
949 /* A real interrupt coming */
951 spin_lock(&db->lock);
953 /* Save previous register address */
954 reg_save = readb(db->io_addr);
956 /* Disable all interrupts */
957 iow(db, DM9000_IMR, IMR_PAR);
959 /* Got DM9000 interrupt status */
960 int_status = ior(db, DM9000_ISR); /* Got ISR */
961 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
963 /* Received the coming packet */
964 if (int_status & ISR_PRS)
967 /* Trnasmit Interrupt check */
968 if (int_status & ISR_PTS)
969 dm9000_tx_done(dev, db);
971 /* Re-enable interrupt mask */
972 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
974 /* Restore previous register address */
975 writeb(reg_save, db->io_addr);
977 spin_unlock(&db->lock);
982 struct dm9000_rxhdr {
986 } __attribute__((__packed__));
989 * Received a packet and pass to upper layer
992 dm9000_rx(struct net_device *dev)
994 board_info_t *db = (board_info_t *) dev->priv;
995 struct dm9000_rxhdr rxhdr;
1001 /* Check packet ready or not */
1003 ior(db, DM9000_MRCMDX); /* Dummy read */
1005 /* Get most updated data */
1006 rxbyte = readb(db->io_data);
1008 /* Status check: this byte must be 0 or 1 */
1009 if (rxbyte > DM9000_PKT_RDY) {
1010 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
1011 iow(db, DM9000_RCR, 0x00); /* Stop Device */
1012 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
1016 if (rxbyte != DM9000_PKT_RDY)
1019 /* A packet ready now & Get status/length */
1021 writeb(DM9000_MRCMD, db->io_addr);
1023 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
1025 RxLen = le16_to_cpu(rxhdr.RxLen);
1027 /* Packet Status check */
1030 dev_dbg(db->dev, "Bad Packet received (runt)\n");
1033 if (RxLen > DM9000_PKT_MAX) {
1034 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
1037 if (rxhdr.RxStatus & 0xbf) {
1039 if (rxhdr.RxStatus & 0x01) {
1040 dev_dbg(db->dev, "fifo error\n");
1041 dev->stats.rx_fifo_errors++;
1043 if (rxhdr.RxStatus & 0x02) {
1044 dev_dbg(db->dev, "crc error\n");
1045 dev->stats.rx_crc_errors++;
1047 if (rxhdr.RxStatus & 0x80) {
1048 dev_dbg(db->dev, "length error\n");
1049 dev->stats.rx_length_errors++;
1053 /* Move data from DM9000 */
1055 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
1056 skb_reserve(skb, 2);
1057 rdptr = (u8 *) skb_put(skb, RxLen - 4);
1059 /* Read received packet from RX SRAM */
1061 (db->inblk)(db->io_data, rdptr, RxLen);
1062 dev->stats.rx_bytes += RxLen;
1064 /* Pass to upper layer */
1065 skb->protocol = eth_type_trans(skb, dev);
1067 dev->stats.rx_packets++;
1070 /* need to dump the packet's data */
1072 (db->dumpblk)(db->io_data, RxLen);
1074 } while (rxbyte == DM9000_PKT_RDY);
1078 * Read a word data from EEPROM
1081 dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
1083 mutex_lock(&db->addr_lock);
1085 iow(db, DM9000_EPAR, offset);
1086 iow(db, DM9000_EPCR, EPCR_ERPRR);
1087 mdelay(8); /* according to the datasheet 200us should be enough,
1088 but it doesn't work */
1089 iow(db, DM9000_EPCR, 0x0);
1091 to[0] = ior(db, DM9000_EPDRL);
1092 to[1] = ior(db, DM9000_EPDRH);
1094 mutex_unlock(&db->addr_lock);
1098 * Write a word data to SROM
1101 dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
1103 mutex_lock(&db->addr_lock);
1105 iow(db, DM9000_EPAR, offset);
1106 iow(db, DM9000_EPDRH, data[1]);
1107 iow(db, DM9000_EPDRL, data[0]);
1108 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1109 mdelay(8); /* same shit */
1110 iow(db, DM9000_EPCR, 0);
1112 mutex_unlock(&db->addr_lock);
1115 #ifdef DM9000_PROGRAM_EEPROM
1117 * Only for development:
1118 * Here we write static data to the eeprom in case
1119 * we don't have valid content on a new board
1122 program_eeprom(board_info_t * db)
1124 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1125 0x0000, /* Autoload: accept nothing */
1126 0x0a46, 0x9000, /* Vendor / Product ID */
1127 0x0000, /* pin control */
1129 }; /* Wake-up mode control */
1131 for (i = 0; i < 8; i++)
1132 write_srom_word(db, i, eeprom[i]);
1138 * Calculate the CRC valude of the Rx packet
1139 * flag = 1 : return the reverse CRC (for the received packet CRC)
1140 * 0 : return the normal CRC (for Hash Table index)
1143 static unsigned long
1144 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1147 u32 crc = ether_crc_le(Len, Data);
1156 * Set DM9000 multicast address
1159 dm9000_hash_table(struct net_device *dev)
1161 board_info_t *db = (board_info_t *) dev->priv;
1162 struct dev_mc_list *mcptr = dev->mc_list;
1163 int mc_cnt = dev->mc_count;
1165 u16 i, oft, hash_table[4];
1166 unsigned long flags;
1168 dm9000_dbg(db, 1, "entering %s\n", __func__);
1170 spin_lock_irqsave(&db->lock,flags);
1172 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1173 iow(db, oft, dev->dev_addr[i]);
1175 /* Clear Hash Table */
1176 for (i = 0; i < 4; i++)
1177 hash_table[i] = 0x0;
1179 /* broadcast address */
1180 hash_table[3] = 0x8000;
1182 /* the multicast address in Hash Table : 64 bits */
1183 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1184 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1185 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1188 /* Write the hash table to MAC MD table */
1189 for (i = 0, oft = 0x16; i < 4; i++) {
1190 iow(db, oft++, hash_table[i] & 0xff);
1191 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1194 spin_unlock_irqrestore(&db->lock,flags);
1199 * Sleep, either by using msleep() or if we are suspending, then
1200 * use mdelay() to sleep.
1202 static void dm9000_msleep(board_info_t *db, unsigned int ms)
1211 * Read a word from phyxcer
1214 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1216 board_info_t *db = (board_info_t *) dev->priv;
1217 unsigned long flags;
1218 unsigned int reg_save;
1221 mutex_lock(&db->addr_lock);
1223 spin_lock_irqsave(&db->lock,flags);
1225 /* Save previous register address */
1226 reg_save = readb(db->io_addr);
1228 /* Fill the phyxcer register into REG_0C */
1229 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1231 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1233 writeb(reg_save, db->io_addr);
1234 spin_unlock_irqrestore(&db->lock,flags);
1236 dm9000_msleep(db, 1); /* Wait read complete */
1238 spin_lock_irqsave(&db->lock,flags);
1239 reg_save = readb(db->io_addr);
1241 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1243 /* The read data keeps on REG_0D & REG_0E */
1244 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1246 /* restore the previous address */
1247 writeb(reg_save, db->io_addr);
1248 spin_unlock_irqrestore(&db->lock,flags);
1250 mutex_unlock(&db->addr_lock);
1255 * Write a word to phyxcer
1258 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1260 board_info_t *db = (board_info_t *) dev->priv;
1261 unsigned long flags;
1262 unsigned long reg_save;
1264 mutex_lock(&db->addr_lock);
1266 spin_lock_irqsave(&db->lock,flags);
1268 /* Save previous register address */
1269 reg_save = readb(db->io_addr);
1271 /* Fill the phyxcer register into REG_0C */
1272 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1274 /* Fill the written data into REG_0D & REG_0E */
1275 iow(db, DM9000_EPDRL, (value & 0xff));
1276 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1278 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1280 writeb(reg_save, db->io_addr);
1281 spin_unlock_irqrestore(&db->lock, flags);
1283 dm9000_msleep(db, 1); /* Wait write complete */
1285 spin_lock_irqsave(&db->lock,flags);
1286 reg_save = readb(db->io_addr);
1288 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1290 /* restore the previous address */
1291 writeb(reg_save, db->io_addr);
1293 spin_unlock_irqrestore(&db->lock, flags);
1294 mutex_unlock(&db->addr_lock);
1298 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1300 struct net_device *ndev = platform_get_drvdata(dev);
1304 db = (board_info_t *) ndev->priv;
1307 if (netif_running(ndev)) {
1308 netif_device_detach(ndev);
1309 dm9000_shutdown(ndev);
1316 dm9000_drv_resume(struct platform_device *dev)
1318 struct net_device *ndev = platform_get_drvdata(dev);
1319 board_info_t *db = (board_info_t *) ndev->priv;
1323 if (netif_running(ndev)) {
1325 dm9000_init_dm9000(ndev);
1327 netif_device_attach(ndev);
1336 dm9000_drv_remove(struct platform_device *pdev)
1338 struct net_device *ndev = platform_get_drvdata(pdev);
1340 platform_set_drvdata(pdev, NULL);
1342 unregister_netdev(ndev);
1343 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1344 free_netdev(ndev); /* free device structure */
1346 dev_dbg(&pdev->dev, "released and freed device\n");
1350 static struct platform_driver dm9000_driver = {
1353 .owner = THIS_MODULE,
1355 .probe = dm9000_probe,
1356 .remove = dm9000_drv_remove,
1357 .suspend = dm9000_drv_suspend,
1358 .resume = dm9000_drv_resume,
1364 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
1366 return platform_driver_register(&dm9000_driver); /* search board and register */
1370 dm9000_cleanup(void)
1372 platform_driver_unregister(&dm9000_driver);
1375 module_init(dm9000_init);
1376 module_exit(dm9000_cleanup);
1378 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1379 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1380 MODULE_LICENSE("GPL");