/*
* ether.c -- Ethernet gadget driver, with CDC and non-CDC options
*
- * Copyright (C) 2003-2005 David Brownell
+ * Copyright (C) 2003-2005,2008 David Brownell
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
*
* 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
#include <linux/kernel.h>
#include <linux/utsname.h>
-#include <linux/device.h>
-#include <linux/ctype.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/cdc.h>
-#include <linux/usb/gadget.h>
+#include "u_ether.h"
-#include "gadget_chips.h"
-
-/*-------------------------------------------------------------------------*/
/*
* Ethernet gadget driver -- with CDC and non-CDC options
* this USB-IF standard as its open-systems interoperability solution;
* most host side USB stacks (except from Microsoft) support it.
*
- * There's some hardware that can't talk CDC. We make that hardware
+ * This is sometimes called "CDC ECM" (Ethernet Control Model) to support
+ * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new
+ * "CDC EEM" (Ethernet Emulation Model) is starting to spread.
+ *
+ * There's some hardware that can't talk CDC ECM. We make that hardware
* implement a "minimalist" vendor-agnostic CDC core: same framing, but
* link-level setup only requires activating the configuration. Only the
* endpoint descriptors, and product/vendor IDs, are relevant; no control
* A third option is also in use. Rather than CDC Ethernet, or something
* simpler, Microsoft pushes their own approach: RNDIS. The published
* RNDIS specs are ambiguous and appear to be incomplete, and are also
- * needlessly complex.
+ * needlessly complex. They borrow more from CDC ACM than CDC ECM.
*/
#define DRIVER_DESC "Ethernet Gadget"
-#define DRIVER_VERSION "May Day 2005"
-
-static const char shortname [] = "ether";
-static const char driver_desc [] = DRIVER_DESC;
+#define DRIVER_VERSION "Memorial Day 2008"
-#define RX_EXTRA 20 /* guard against rx overflows */
-
-#include "rndis.h"
-
-#ifndef CONFIG_USB_ETH_RNDIS
-#define rndis_uninit(x) do{}while(0)
-#define rndis_deregister(c) do{}while(0)
-#define rndis_exit() do{}while(0)
+#ifdef CONFIG_USB_ETH_RNDIS
+#define PREFIX "RNDIS/"
+#else
+#define PREFIX ""
#endif
-/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
-#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
- |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
- |USB_CDC_PACKET_TYPE_PROMISCUOUS \
- |USB_CDC_PACKET_TYPE_DIRECTED)
-
-
-/*-------------------------------------------------------------------------*/
-
-struct eth_dev {
- spinlock_t lock;
- struct usb_gadget *gadget;
- struct usb_request *req; /* for control responses */
- struct usb_request *stat_req; /* for cdc & rndis status */
-
- u8 config;
- struct usb_ep *in_ep, *out_ep, *status_ep;
- const struct usb_endpoint_descriptor
- *in, *out, *status;
-
- spinlock_t req_lock;
- struct list_head tx_reqs, rx_reqs;
-
- struct net_device *net;
- struct net_device_stats stats;
- atomic_t tx_qlen;
-
- struct work_struct work;
- unsigned zlp:1;
- unsigned cdc:1;
- unsigned rndis:1;
- unsigned suspended:1;
- u16 cdc_filter;
- unsigned long todo;
-#define WORK_RX_MEMORY 0
- int rndis_config;
- u8 host_mac [ETH_ALEN];
-};
-
-/* This version autoconfigures as much as possible at run-time.
+/*
+ * This driver aims for interoperability by using CDC ECM unless
+ *
+ * can_support_ecm()
*
- * It also ASSUMES a self-powered device, without remote wakeup,
- * although remote wakeup support would make sense.
+ * returns false, in which case it supports the CDC Subset. By default,
+ * that returns true; most hardware has no problems with CDC ECM, that's
+ * a good default. Previous versions of this driver had no default; this
+ * version changes that, removing overhead for new controller support.
+ *
+ * IF YOUR HARDWARE CAN'T SUPPORT CDC ECM, UPDATE THAT ROUTINE!
*/
+static inline bool has_rndis(void)
+{
+#ifdef CONFIG_USB_ETH_RNDIS
+ return true;
+#else
+ return false;
+#endif
+}
+
/*-------------------------------------------------------------------------*/
/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
/* Thanks to NetChip Technologies for donating this product ID.
* It's for devices with only CDC Ethernet configurations.
*/
-#define CDC_VENDOR_NUM 0x0525 /* NetChip */
-#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
+#define CDC_VENDOR_NUM 0x0525 /* NetChip */
+#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
/* For hardware that can't talk CDC, we use the same vendor ID that
* ARM Linux has used for ethernet-over-usb, both with sa1100 and
#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
-
-/* Some systems will want different product identifers published in the
- * device descriptor, either numbers or strings or both. These string
- * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
- */
-
-static ushort idVendor;
-module_param(idVendor, ushort, S_IRUGO);
-MODULE_PARM_DESC(idVendor, "USB Vendor ID");
-
-static ushort idProduct;
-module_param(idProduct, ushort, S_IRUGO);
-MODULE_PARM_DESC(idProduct, "USB Product ID");
-
-static ushort bcdDevice;
-module_param(bcdDevice, ushort, S_IRUGO);
-MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
-
-static char *iManufacturer;
-module_param(iManufacturer, charp, S_IRUGO);
-MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
-
-static char *iProduct;
-module_param(iProduct, charp, S_IRUGO);
-MODULE_PARM_DESC(iProduct, "USB Product string");
-
-static char *iSerialNumber;
-module_param(iSerialNumber, charp, S_IRUGO);
-MODULE_PARM_DESC(iSerialNumber, "SerialNumber");
-
-/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
-static char *dev_addr;
-module_param(dev_addr, charp, S_IRUGO);
-MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
-
-/* this address is invisible to ifconfig */
-static char *host_addr;
-module_param(host_addr, charp, S_IRUGO);
-MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
-
-
-/*-------------------------------------------------------------------------*/
-
-/* Include CDC support if we could run on CDC-capable hardware. */
-
-#ifdef CONFIG_USB_GADGET_NET2280
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_DUMMY_HCD
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_GOKU
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_LH7A40X
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_MQ11XX
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_OMAP
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_N9604
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_S3C2410
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_AT91
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_MUSBHSFC
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_MUSB_HDRC
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_ATMEL_USBA
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_FSL_USB2
-#define DEV_CONFIG_CDC
-#endif
-
-/* For CDC-incapable hardware, choose the simple cdc subset.
- * Anything that talks bulk (without notable bugs) can do this.
- */
-#ifdef CONFIG_USB_GADGET_PXA25X
-#define DEV_CONFIG_SUBSET
-#endif
-
-#ifdef CONFIG_USB_GADGET_PXA27X
-#define DEV_CONFIG_SUBSET
-#endif
-
-#ifdef CONFIG_USB_GADGET_SUPERH
-#define DEV_CONFIG_SUBSET
-#endif
-
-#ifdef CONFIG_USB_GADGET_SA1100
-/* use non-CDC for backwards compatibility */
-#define DEV_CONFIG_SUBSET
-#endif
-
-#ifdef CONFIG_USB_GADGET_M66592
-#define DEV_CONFIG_CDC
-#endif
-
-#ifdef CONFIG_USB_GADGET_AMD5536UDC
-#define DEV_CONFIG_CDC
-#endif
-
-
-/*-------------------------------------------------------------------------*/
-
-/* "main" config is either CDC, or its simple subset */
-static inline int is_cdc(struct eth_dev *dev)
-{
-#if !defined(DEV_CONFIG_SUBSET)
- return 1; /* only cdc possible */
-#elif !defined (DEV_CONFIG_CDC)
- return 0; /* only subset possible */
-#else
- return dev->cdc; /* depends on what hardware we found */
-#endif
-}
-
-/* "secondary" RNDIS config may sometimes be activated */
-static inline int rndis_active(struct eth_dev *dev)
-{
-#ifdef CONFIG_USB_ETH_RNDIS
- return dev->rndis;
-#else
- return 0;
-#endif
-}
-
-#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
-#define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev))
-
-
-
-#define DEFAULT_QLEN 2 /* double buffering by default */
-
-/* peak bulk transfer bits-per-second */
-#define HS_BPS (13 * 512 * 8 * 1000 * 8)
-#define FS_BPS (19 * 64 * 1 * 1000 * 8)
-
-#ifdef CONFIG_USB_GADGET_DUALSPEED
-#define DEVSPEED USB_SPEED_HIGH
-
-static unsigned qmult = 5;
-module_param (qmult, uint, S_IRUGO|S_IWUSR);
-
-
-/* for dual-speed hardware, use deeper queues at highspeed */
-#define qlen(gadget) \
- (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
-
-static inline int BITRATE(struct usb_gadget *g)
-{
- return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
-}
-
-#else /* full speed (low speed doesn't do bulk) */
-
-#define qmult 1
-
-#define DEVSPEED USB_SPEED_FULL
-
-#define qlen(gadget) DEFAULT_QLEN
-
-static inline int BITRATE(struct usb_gadget *g)
-{
- return FS_BPS;
-}
-#endif
-
-
-/*-------------------------------------------------------------------------*/
-
-#define xprintk(d,level,fmt,args...) \
- printk(level "%s: " fmt , (d)->net->name , ## args)
-
-#ifdef DEBUG
-#undef DEBUG
-#define DEBUG(dev,fmt,args...) \
- xprintk(dev , KERN_DEBUG , fmt , ## args)
-#else
-#define DEBUG(dev,fmt,args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VDEBUG DEBUG
-#else
-#define VDEBUG(dev,fmt,args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#define ERROR(dev,fmt,args...) \
- xprintk(dev , KERN_ERR , fmt , ## args)
-#define WARN(dev,fmt,args...) \
- xprintk(dev , KERN_WARNING , fmt , ## args)
-#define INFO(dev,fmt,args...) \
- xprintk(dev , KERN_INFO , fmt , ## args)
-
/*-------------------------------------------------------------------------*/
-/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
- * ep0 implementation: descriptors, config management, setup().
- * also optional class-specific notification interrupt transfer.
- */
-
-/*
- * DESCRIPTORS ... most are static, but strings and (full) configuration
- * descriptors are built on demand. For now we do either full CDC, or
- * our simple subset, with RNDIS as an optional second configuration.
- *
- * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
- * the class descriptors match a modem (they're ignored; it's really just
- * Ethernet functionality), they don't need the NOP altsetting, and the
- * status transfer endpoint isn't optional.
- */
-
-#define STRING_MANUFACTURER 1
-#define STRING_PRODUCT 2
-#define STRING_ETHADDR 3
-#define STRING_DATA 4
-#define STRING_CONTROL 5
-#define STRING_RNDIS_CONTROL 6
-#define STRING_CDC 7
-#define STRING_SUBSET 8
-#define STRING_RNDIS 9
-#define STRING_SERIALNUMBER 10
-
-/* holds our biggest descriptor (or RNDIS response) */
-#define USB_BUFSIZ 256
-
-/*
- * This device advertises one configuration, eth_config, unless RNDIS
- * is enabled (rndis_config) on hardware supporting at least two configs.
- *
- * NOTE: Controllers like superh_udc should probably be able to use
- * an RNDIS-only configuration.
- *
- * FIXME define some higher-powered configurations to make it easier
- * to recharge batteries ...
- */
-
-#define DEV_CONFIG_VALUE 1 /* cdc or subset */
-#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
-
-static struct usb_device_descriptor
-device_desc = {
+static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = USB_DT_DEVICE,
.bDeviceClass = USB_CLASS_COMM,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
+ /* .bMaxPacketSize0 = f(hardware) */
+ /* Vendor and product id defaults change according to what configs
+ * we support. (As does bNumConfigurations.) These values can
+ * also be overridden by module parameters.
+ */
.idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
.idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
- .iManufacturer = STRING_MANUFACTURER,
- .iProduct = STRING_PRODUCT,
+ /* .bcdDevice = f(hardware) */
+ /* .iManufacturer = DYNAMIC */
+ /* .iProduct = DYNAMIC */
+ /* NO SERIAL NUMBER */
.bNumConfigurations = 1,
};
-static struct usb_otg_descriptor
-otg_descriptor = {
+static struct usb_otg_descriptor otg_descriptor = {
.bLength = sizeof otg_descriptor,
.bDescriptorType = USB_DT_OTG,
- .bmAttributes = USB_OTG_SRP,
-};
-
-static struct usb_config_descriptor
-eth_config = {
- .bLength = sizeof eth_config,
- .bDescriptorType = USB_DT_CONFIG,
-
- /* compute wTotalLength on the fly */
- .bNumInterfaces = 2,
- .bConfigurationValue = DEV_CONFIG_VALUE,
- .iConfiguration = STRING_CDC,
- .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
- .bMaxPower = 50,
-};
-
-#ifdef CONFIG_USB_ETH_RNDIS
-static struct usb_config_descriptor
-rndis_config = {
- .bLength = sizeof rndis_config,
- .bDescriptorType = USB_DT_CONFIG,
-
- /* compute wTotalLength on the fly */
- .bNumInterfaces = 2,
- .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
- .iConfiguration = STRING_RNDIS,
- .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
- .bMaxPower = 50,
-};
-#endif
-
-/*
- * Compared to the simple CDC subset, the full CDC Ethernet model adds
- * three class descriptors, two interface descriptors, optional status
- * endpoint. Both have a "data" interface and two bulk endpoints.
- * There are also differences in how control requests are handled.
- *
- * RNDIS shares a lot with CDC-Ethernet, since it's a variant of the
- * CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it
- * may hang or oops. Since bugfixes (or accurate specs, letting Linux
- * work around those bugs) are unlikely to ever come from MSFT, you may
- * wish to avoid using RNDIS.
- *
- * MCCI offers an alternative to RNDIS if you need to connect to Windows
- * but have hardware that can't support CDC Ethernet. We add descriptors
- * to present the CDC Subset as a (nonconformant) CDC MDLM variant called
- * "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can
- * get those drivers from MCCI, or bundled with various products.
- */
-
-#ifdef DEV_CONFIG_CDC
-static struct usb_interface_descriptor
-control_intf = {
- .bLength = sizeof control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bInterfaceNumber = 0,
- /* status endpoint is optional; this may be patched later */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
- .bInterfaceProtocol = USB_CDC_PROTO_NONE,
- .iInterface = STRING_CONTROL,
+ /* REVISIT SRP-only hardware is possible, although
+ * it would not be called "OTG" ...
+ */
+ .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
};
-#endif
-
-#ifdef CONFIG_USB_ETH_RNDIS
-static const struct usb_interface_descriptor
-rndis_control_intf = {
- .bLength = sizeof rndis_control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = 0,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
- .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
- .iInterface = STRING_RNDIS_CONTROL,
+static const struct usb_descriptor_header *otg_desc[] = {
+ (struct usb_descriptor_header *) &otg_descriptor,
+ NULL,
};
-#endif
-static const struct usb_cdc_header_desc header_desc = {
- .bLength = sizeof header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
- .bcdCDC = __constant_cpu_to_le16 (0x0110),
-};
+/* string IDs are assigned dynamically */
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
-static const struct usb_cdc_union_desc union_desc = {
- .bLength = sizeof union_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
+static char manufacturer[50];
- .bMasterInterface0 = 0, /* index of control interface */
- .bSlaveInterface0 = 1, /* index of DATA interface */
+static struct usb_string strings_dev[] = {
+ [STRING_MANUFACTURER_IDX].s = manufacturer,
+ [STRING_PRODUCT_IDX].s = PREFIX DRIVER_DESC,
+ { } /* end of list */
};
-#endif /* CDC || RNDIS */
-
-#ifdef CONFIG_USB_ETH_RNDIS
-
-static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
- .bLength = sizeof call_mgmt_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
-
- .bmCapabilities = 0x00,
- .bDataInterface = 0x01,
+static struct usb_gadget_strings stringtab_dev = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_dev,
};
-static const struct usb_cdc_acm_descriptor acm_descriptor = {
- .bLength = sizeof acm_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
-
- .bmCapabilities = 0x00,
+static struct usb_gadget_strings *dev_strings[] = {
+ &stringtab_dev,
+ NULL,
};
-#endif
-
-#ifndef DEV_CONFIG_CDC
-
-/* "SAFE" loosely follows CDC WMC MDLM, violating the spec in various
- * ways: data endpoints live in the control interface, there's no data
- * interface, and it's not used to talk to a cell phone radio.
- */
-
-static const struct usb_cdc_mdlm_desc mdlm_desc = {
- .bLength = sizeof mdlm_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_MDLM_TYPE,
+static u8 hostaddr[ETH_ALEN];
- .bcdVersion = __constant_cpu_to_le16(0x0100),
- .bGUID = {
- 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
- 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
- },
-};
+/*-------------------------------------------------------------------------*/
-/* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
- * can't really use its struct. All we do here is say that we're using
- * the submode of "SAFE" which directly matches the CDC Subset.
+/*
+ * We may not have an RNDIS configuration, but if we do it needs to be
+ * the first one present. That's to make Microsoft's drivers happy,
+ * and to follow DOCSIS 1.0 (cable modem standard).
*/
-static const u8 mdlm_detail_desc[] = {
- 6,
- USB_DT_CS_INTERFACE,
- USB_CDC_MDLM_DETAIL_TYPE,
-
- 0, /* "SAFE" */
- 0, /* network control capabilities (none) */
- 0, /* network data capabilities ("raw" encapsulation) */
-};
+static int __init rndis_do_config(struct usb_configuration *c)
+{
+ /* FIXME alloc iConfiguration string, set it in c->strings */
-#endif
+ if (gadget_is_otg(c->cdev->gadget)) {
+ c->descriptors = otg_desc;
+ c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+ }
-static const struct usb_cdc_ether_desc ether_desc = {
- .bLength = sizeof ether_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
+ return rndis_bind_config(c, hostaddr);
+}
- /* this descriptor actually adds value, surprise! */
- .iMACAddress = STRING_ETHADDR,
- .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */
- .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN),
- .wNumberMCFilters = __constant_cpu_to_le16 (0),
- .bNumberPowerFilters = 0,
+static struct usb_configuration rndis_config_driver = {
+ .label = "RNDIS",
+ .bind = rndis_do_config,
+ .bConfigurationValue = 2,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+ .bMaxPower = 1, /* 2 mA, minimal */
};
+/*-------------------------------------------------------------------------*/
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
-
-/* include the status endpoint if we can, even where it's optional.
- * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
- * packet, to simplify cancellation; and a big transfer interval, to
- * waste less bandwidth.
- *
- * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
- * if they ignore the connect/disconnect notifications that real aether
- * can provide. more advanced cdc configurations might want to support
- * encapsulated commands (vendor-specific, using control-OUT).
- *
- * RNDIS requires the status endpoint, since it uses that encapsulation
- * mechanism for its funky RPC scheme.
+/*
+ * We _always_ have an ECM or CDC Subset configuration.
*/
+static int __init eth_do_config(struct usb_configuration *c)
+{
+ /* FIXME alloc iConfiguration string, set it in c->strings */
-#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
-#define STATUS_BYTECOUNT 16 /* 8 byte header + data */
-
-static struct usb_endpoint_descriptor
-fs_status_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
- .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
-};
-#endif
-
-#ifdef DEV_CONFIG_CDC
-
-/* the default data interface has no endpoints ... */
+ if (gadget_is_otg(c->cdev->gadget)) {
+ c->descriptors = otg_desc;
+ c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+ }
-static const struct usb_interface_descriptor
-data_nop_intf = {
- .bLength = sizeof data_nop_intf,
- .bDescriptorType = USB_DT_INTERFACE,
+ if (can_support_ecm(c->cdev->gadget))
+ return ecm_bind_config(c, hostaddr);
+ else
+ return geth_bind_config(c, hostaddr);
+}
- .bInterfaceNumber = 1,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
+static struct usb_configuration eth_config_driver = {
+ /* .label = f(hardware) */
+ .bind = eth_do_config,
+ .bConfigurationValue = 1,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+ .bMaxPower = 1, /* 2 mA, minimal */
};
-/* ... but the "real" data interface has two bulk endpoints */
-
-static const struct usb_interface_descriptor
-data_intf = {
- .bLength = sizeof data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
+/*-------------------------------------------------------------------------*/
- .bInterfaceNumber = 1,
- .bAlternateSetting = 1,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- .iInterface = STRING_DATA,
-};
+static int __init eth_bind(struct usb_composite_dev *cdev)
+{
+ int gcnum;
+ struct usb_gadget *gadget = cdev->gadget;
+ int status;
-#endif
+ /* set up network link layer */
+ status = gether_setup(cdev->gadget, hostaddr);
+ if (status < 0)
+ return status;
-#ifdef CONFIG_USB_ETH_RNDIS
+ /* set up main config label and device descriptor */
+ if (can_support_ecm(cdev->gadget)) {
+ /* ECM */
+ eth_config_driver.label = "CDC Ethernet (ECM)";
+ } else {
+ /* CDC Subset */
+ eth_config_driver.label = "CDC Subset/SAFE";
-/* RNDIS doesn't activate by changing to the "real" altsetting */
+ device_desc.idVendor = cpu_to_le16(SIMPLE_VENDOR_NUM),
+ device_desc.idProduct = cpu_to_le16(SIMPLE_PRODUCT_NUM),
+ device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
+ }
-static const struct usb_interface_descriptor
-rndis_data_intf = {
- .bLength = sizeof rndis_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
+ if (has_rndis()) {
+ /* RNDIS plus ECM-or-Subset */
+ device_desc.idVendor = cpu_to_le16(RNDIS_VENDOR_NUM),
+ device_desc.idProduct = cpu_to_le16(RNDIS_PRODUCT_NUM),
+ device_desc.bNumConfigurations = 2;
+ }
- .bInterfaceNumber = 1,
- .bAlternateSetting = 0,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- .iInterface = STRING_DATA,
-};
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
+ else {
+ /* We assume that can_support_ecm() tells the truth;
+ * but if the controller isn't recognized at all then
+ * that assumption is a bit more likely to be wrong.
+ */
+ WARN(cdev, "controller '%s' not recognized; trying %s\n",
+ gadget->name,
+ eth_config_driver.label);
+ device_desc.bcdDevice =
+ __constant_cpu_to_le16(0x0300 | 0x0099);
+ }
-#endif
-#ifdef DEV_CONFIG_SUBSET
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
-/*
- * "Simple" CDC-subset option is a simple vendor-neutral model that most
- * full speed controllers can handle: one interface, two bulk endpoints.
- *
- * To assist host side drivers, we fancy it up a bit, and add descriptors
- * so some host side drivers will understand it as a "SAFE" variant.
- */
+ /* device descriptor strings: manufacturer, product */
+ snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
+ init_utsname()->sysname, init_utsname()->release,
+ gadget->name);
+ status = usb_string_id(cdev);
+ if (status < 0)
+ goto fail;
+ strings_dev[STRING_MANUFACTURER_IDX].id = status;
+ device_desc.iManufacturer = status;
-static const struct usb_interface_descriptor
-subset_data_intf = {
- .bLength = sizeof subset_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
+ status = usb_string_id(cdev);
+ if (status < 0)
+ goto fail;
+ strings_dev[STRING_PRODUCT_IDX].id = status;
+ device_desc.iProduct = status;
- .bInterfaceNumber = 0,
- .bAlternateSetting = 0,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
- .bInterfaceProtocol = 0,
- .iInterface = STRING_DATA,
-};
+ /* register our configuration(s); RNDIS first, if it's used */
+ if (has_rndis()) {
+ status = usb_add_config(cdev, &rndis_config_driver);
+ if (status < 0)
+ goto fail;
+ }
-#endif /* SUBSET */
+ status = usb_add_config(cdev, ð_config_driver);
+ if (status < 0)
+ goto fail;
+ INFO(cdev, "%s, version: " DRIVER_VERSION "\n", DRIVER_DESC);
-static struct usb_endpoint_descriptor
-fs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
+ return 0;
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
+fail:
+ gether_cleanup();
+ return status;
+}
-static struct usb_endpoint_descriptor
-fs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
+static int __exit eth_unbind(struct usb_composite_dev *cdev)
+{
+ gether_cleanup();
+ return 0;
+}
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
+static struct usb_composite_driver eth_driver = {
+ .name = "g_ether",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .bind = eth_bind,
+ .unbind = __exit_p(eth_unbind),
};
-static const struct usb_descriptor_header *fs_eth_function [11] = {
- (struct usb_descriptor_header *) &otg_descriptor,
-#ifdef DEV_CONFIG_CDC
- /* "cdc" mode descriptors */
- (struct usb_descriptor_header *) &control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &union_desc,
- (struct usb_descriptor_header *) ðer_desc,
- /* NOTE: status endpoint may need to be removed */
- (struct usb_descriptor_header *) &fs_status_desc,
- /* data interface, with altsetting */
- (struct usb_descriptor_header *) &data_nop_intf,
- (struct usb_descriptor_header *) &data_intf,
- (struct usb_descriptor_header *) &fs_source_desc,
- (struct usb_descriptor_header *) &fs_sink_desc,
- NULL,
-#endif /* DEV_CONFIG_CDC */
-};
+MODULE_DESCRIPTION(PREFIX DRIVER_DESC);
+MODULE_AUTHOR("David Brownell, Benedikt Spanger");
+MODULE_LICENSE("GPL");
-static inline void __init fs_subset_descriptors(void)
+static int __init init(void)
{
-#ifdef DEV_CONFIG_SUBSET
- /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
- fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
- fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
- fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
- fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
- fs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
- fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc;
- fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc;
- fs_eth_function[8] = NULL;
-#else
- fs_eth_function[1] = NULL;
-#endif
+ return usb_composite_register(ð_driver);
}
+module_init(init);
-#ifdef CONFIG_USB_ETH_RNDIS
-static const struct usb_descriptor_header *fs_rndis_function [] = {
- (struct usb_descriptor_header *) &otg_descriptor,
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &union_desc,
- (struct usb_descriptor_header *) &fs_status_desc,
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &fs_source_desc,
- (struct usb_descriptor_header *) &fs_sink_desc,
- NULL,
-};
-#endif
-
-/*
- * usb 2.0 devices need to expose both high speed and full speed
- * descriptors, unless they only run at full speed.
- */
-
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
-static struct usb_endpoint_descriptor
-hs_status_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
- .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
-};
-#endif /* DEV_CONFIG_CDC */
-
-static struct usb_endpoint_descriptor
-hs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16 (512),
-};
-
-static struct usb_endpoint_descriptor
-hs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16 (512),
-};
-
-static struct usb_qualifier_descriptor
-dev_qualifier = {
- .bLength = sizeof dev_qualifier,
- .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
-
- .bcdUSB = __constant_cpu_to_le16 (0x0200),
- .bDeviceClass = USB_CLASS_COMM,
-
- .bNumConfigurations = 1,
-};
-
-static const struct usb_descriptor_header *hs_eth_function [11] = {
- (struct usb_descriptor_header *) &otg_descriptor,
-#ifdef DEV_CONFIG_CDC
- /* "cdc" mode descriptors */
- (struct usb_descriptor_header *) &control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &union_desc,
- (struct usb_descriptor_header *) ðer_desc,
- /* NOTE: status endpoint may need to be removed */
- (struct usb_descriptor_header *) &hs_status_desc,
- /* data interface, with altsetting */
- (struct usb_descriptor_header *) &data_nop_intf,
- (struct usb_descriptor_header *) &data_intf,
- (struct usb_descriptor_header *) &hs_source_desc,
- (struct usb_descriptor_header *) &hs_sink_desc,
- NULL,
-#endif /* DEV_CONFIG_CDC */
-};
-
-static inline void __init hs_subset_descriptors(void)
-{
-#ifdef DEV_CONFIG_SUBSET
- /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
- hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
- hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
- hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
- hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
- hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
- hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc;
- hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc;
- hs_eth_function[8] = NULL;
-#else
- hs_eth_function[1] = NULL;
-#endif
-}
-
-#ifdef CONFIG_USB_ETH_RNDIS
-static const struct usb_descriptor_header *hs_rndis_function [] = {
- (struct usb_descriptor_header *) &otg_descriptor,
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &union_desc,
- (struct usb_descriptor_header *) &hs_status_desc,
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &hs_source_desc,
- (struct usb_descriptor_header *) &hs_sink_desc,
- NULL,
-};
-#endif
-
-
-/* maxpacket and other transfer characteristics vary by speed. */
-static inline struct usb_endpoint_descriptor *
-ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
- struct usb_endpoint_descriptor *fs)
-{
- if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return hs;
- return fs;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* descriptors that are built on-demand */
-
-static char manufacturer [50];
-static char product_desc [40] = DRIVER_DESC;
-static char serial_number [20];
-
-/* address that the host will use ... usually assigned at random */
-static char ethaddr [2 * ETH_ALEN + 1];
-
-/* static strings, in UTF-8 */
-static struct usb_string strings [] = {
- { STRING_MANUFACTURER, manufacturer, },
- { STRING_PRODUCT, product_desc, },
- { STRING_SERIALNUMBER, serial_number, },
- { STRING_DATA, "Ethernet Data", },
- { STRING_ETHADDR, ethaddr, },
-#ifdef DEV_CONFIG_CDC
- { STRING_CDC, "CDC Ethernet", },
- { STRING_CONTROL, "CDC Communications Control", },
-#endif
-#ifdef DEV_CONFIG_SUBSET
- { STRING_SUBSET, "CDC Ethernet Subset", },
-#endif
-#ifdef CONFIG_USB_ETH_RNDIS
- { STRING_RNDIS, "RNDIS", },
- { STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
-#endif
- { } /* end of list */
-};
-
-static struct usb_gadget_strings stringtab = {
- .language = 0x0409, /* en-us */
- .strings = strings,
-};
-
-/*
- * one config, two interfaces: control, data.
- * complications: class descriptors, and an altsetting.
- */
-static int
-config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg)
-{
- int len;
- const struct usb_config_descriptor *config;
- const struct usb_descriptor_header **function;
- int hs = 0;
-
- if (gadget_is_dualspeed(g)) {
- hs = (g->speed == USB_SPEED_HIGH);
- if (type == USB_DT_OTHER_SPEED_CONFIG)
- hs = !hs;
- }
-#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
-
- if (index >= device_desc.bNumConfigurations)
- return -EINVAL;
-
-#ifdef CONFIG_USB_ETH_RNDIS
- /* list the RNDIS config first, to make Microsoft's drivers
- * happy. DOCSIS 1.0 needs this too.
- */
- if (device_desc.bNumConfigurations == 2 && index == 0) {
- config = &rndis_config;
- function = which_fn (rndis);
- } else
-#endif
- {
- config = ð_config;
- function = which_fn (eth);
- }
-
- /* for now, don't advertise srp-only devices */
- if (!is_otg)
- function++;
-
- len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
- if (len < 0)
- return len;
- ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
- return len;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void eth_start (struct eth_dev *dev, gfp_t gfp_flags);
-static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags);
-
-static int
-set_ether_config (struct eth_dev *dev, gfp_t gfp_flags)
-{
- int result = 0;
- struct usb_gadget *gadget = dev->gadget;
-
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
- /* status endpoint used for RNDIS and (optionally) CDC */
- if (!subset_active(dev) && dev->status_ep) {
- dev->status = ep_desc (gadget, &hs_status_desc,
- &fs_status_desc);
- dev->status_ep->driver_data = dev;
-
- result = usb_ep_enable (dev->status_ep, dev->status);
- if (result != 0) {
- DEBUG (dev, "enable %s --> %d\n",
- dev->status_ep->name, result);
- goto done;
- }
- }
-#endif
-
- dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc);
- dev->in_ep->driver_data = dev;
-
- dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc);
- dev->out_ep->driver_data = dev;
-
- /* With CDC, the host isn't allowed to use these two data
- * endpoints in the default altsetting for the interface.
- * so we don't activate them yet. Reset from SET_INTERFACE.
- *
- * Strictly speaking RNDIS should work the same: activation is
- * a side effect of setting a packet filter. Deactivation is
- * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
- */
- if (!cdc_active(dev)) {
- result = usb_ep_enable (dev->in_ep, dev->in);
- if (result != 0) {
- DEBUG(dev, "enable %s --> %d\n",
- dev->in_ep->name, result);
- goto done;
- }
-
- result = usb_ep_enable (dev->out_ep, dev->out);
- if (result != 0) {
- DEBUG (dev, "enable %s --> %d\n",
- dev->out_ep->name, result);
- goto done;
- }
- }
-
-done:
- if (result == 0)
- result = alloc_requests (dev, qlen (gadget), gfp_flags);
-
- /* on error, disable any endpoints */
- if (result < 0) {
- if (!subset_active(dev) && dev->status_ep)
- (void) usb_ep_disable (dev->status_ep);
- dev->status = NULL;
- (void) usb_ep_disable (dev->in_ep);
- (void) usb_ep_disable (dev->out_ep);
- dev->in = NULL;
- dev->out = NULL;
- }
-
- /* activate non-CDC configs right away
- * this isn't strictly according to the RNDIS spec
- */
- else if (!cdc_active (dev)) {
- netif_carrier_on (dev->net);
- if (netif_running (dev->net)) {
- spin_unlock (&dev->lock);
- eth_start (dev, GFP_ATOMIC);
- spin_lock (&dev->lock);
- }
- }
-
- if (result == 0)
- DEBUG (dev, "qlen %d\n", qlen (gadget));
-
- /* caller is responsible for cleanup on error */
- return result;
-}
-
-static void eth_reset_config (struct eth_dev *dev)
-{
- struct usb_request *req;
-
- if (dev->config == 0)
- return;
-
- DEBUG (dev, "%s\n", __func__);
-
- netif_stop_queue (dev->net);
- netif_carrier_off (dev->net);
-
- /* RNDIS enters RNDIS_UNINITIALIZED state */
- rndis_uninit(dev->rndis_config);
-
- /* disable endpoints, forcing (synchronous) completion of
- * pending i/o. then free the requests.
- */
- if (dev->in) {
- usb_ep_disable (dev->in_ep);
- spin_lock(&dev->req_lock);
- while (likely (!list_empty (&dev->tx_reqs))) {
- req = container_of (dev->tx_reqs.next,
- struct usb_request, list);
- list_del (&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request (dev->in_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- }
- if (dev->out) {
- usb_ep_disable (dev->out_ep);
- spin_lock(&dev->req_lock);
- while (likely (!list_empty (&dev->rx_reqs))) {
- req = container_of (dev->rx_reqs.next,
- struct usb_request, list);
- list_del (&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request (dev->out_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- }
-
- if (dev->status) {
- usb_ep_disable (dev->status_ep);
- }
- dev->rndis = 0;
- dev->cdc_filter = 0;
- dev->config = 0;
-}
-
-/* change our operational config. must agree with the code
- * that returns config descriptors, and altsetting code.
- */
-static int
-eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags)
-{
- int result = 0;
- struct usb_gadget *gadget = dev->gadget;
-
- if (gadget_is_sa1100 (gadget)
- && dev->config
- && atomic_read (&dev->tx_qlen) != 0) {
- /* tx fifo is full, but we can't clear it...*/
- INFO (dev, "can't change configurations\n");
- return -ESPIPE;
- }
- eth_reset_config (dev);
-
- switch (number) {
- case DEV_CONFIG_VALUE:
- result = set_ether_config (dev, gfp_flags);
- break;
-#ifdef CONFIG_USB_ETH_RNDIS
- case DEV_RNDIS_CONFIG_VALUE:
- dev->rndis = 1;
- result = set_ether_config (dev, gfp_flags);
- break;
-#endif
- default:
- result = -EINVAL;
- /* FALL THROUGH */
- case 0:
- break;
- }
-
- if (result) {
- if (number)
- eth_reset_config (dev);
- usb_gadget_vbus_draw(dev->gadget,
- gadget_is_otg(dev->gadget) ? 8 : 100);
- } else {
- char *speed;
- unsigned power;
-
- power = 2 * eth_config.bMaxPower;
- usb_gadget_vbus_draw(dev->gadget, power);
-
- switch (gadget->speed) {
- case USB_SPEED_FULL: speed = "full"; break;
-#ifdef CONFIG_USB_GADGET_DUALSPEED
- case USB_SPEED_HIGH: speed = "high"; break;
-#endif
- default: speed = "?"; break;
- }
-
- dev->config = number;
- INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
- speed, number, power, driver_desc,
- rndis_active(dev)
- ? "RNDIS"
- : (cdc_active(dev)
- ? "CDC Ethernet"
- : "CDC Ethernet Subset"));
- }
- return result;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef DEV_CONFIG_CDC
-
-/* The interrupt endpoint is used in CDC networking models (Ethernet, ATM)
- * only to notify the host about link status changes (which we support) or
- * report completion of some encapsulated command (as used in RNDIS). Since
- * we want this CDC Ethernet code to be vendor-neutral, we don't use that
- * command mechanism; and only one status request is ever queued.
- */
-
-static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
-{
- struct usb_cdc_notification *event = req->buf;
- int value = req->status;
- struct eth_dev *dev = ep->driver_data;
-
- /* issue the second notification if host reads the first */
- if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
- && value == 0) {
- __le32 *data = req->buf + sizeof *event;
-
- event->bmRequestType = 0xA1;
- event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
- event->wValue = __constant_cpu_to_le16 (0);
- event->wIndex = __constant_cpu_to_le16 (1);
- event->wLength = __constant_cpu_to_le16 (8);
-
- /* SPEED_CHANGE data is up/down speeds in bits/sec */
- data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
-
- req->length = STATUS_BYTECOUNT;
- value = usb_ep_queue (ep, req, GFP_ATOMIC);
- DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
- if (value == 0)
- return;
- } else if (value != -ECONNRESET)
- DEBUG (dev, "event %02x --> %d\n",
- event->bNotificationType, value);
- req->context = NULL;
-}
-
-static void issue_start_status (struct eth_dev *dev)
-{
- struct usb_request *req = dev->stat_req;
- struct usb_cdc_notification *event;
- int value;
-
- DEBUG (dev, "%s, flush old status first\n", __func__);
-
- /* flush old status
- *
- * FIXME ugly idiom, maybe we'd be better with just
- * a "cancel the whole queue" primitive since any
- * unlink-one primitive has way too many error modes.
- * here, we "know" toggle is already clear...
- *
- * FIXME iff req->context != null just dequeue it
- */
- usb_ep_disable (dev->status_ep);
- usb_ep_enable (dev->status_ep, dev->status);
-
- /* 3.8.1 says to issue first NETWORK_CONNECTION, then
- * a SPEED_CHANGE. could be useful in some configs.
- */
- event = req->buf;
- event->bmRequestType = 0xA1;
- event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
- event->wValue = __constant_cpu_to_le16 (1); /* connected */
- event->wIndex = __constant_cpu_to_le16 (1);
- event->wLength = 0;
-
- req->length = sizeof *event;
- req->complete = eth_status_complete;
- req->context = dev;
-
- value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
- if (value < 0)
- DEBUG (dev, "status buf queue --> %d\n", value);
-}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
-{
- if (req->status || req->actual != req->length)
- DEBUG ((struct eth_dev *) ep->driver_data,
- "setup complete --> %d, %d/%d\n",
- req->status, req->actual, req->length);
-}
-
-#ifdef CONFIG_USB_ETH_RNDIS
-
-static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
-{
- if (req->status || req->actual != req->length)
- DEBUG ((struct eth_dev *) ep->driver_data,
- "rndis response complete --> %d, %d/%d\n",
- req->status, req->actual, req->length);
-
- /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
-}
-
-static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
-{
- struct eth_dev *dev = ep->driver_data;
- int status;
-
- /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
- spin_lock(&dev->lock);
- status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
- if (status < 0)
- ERROR(dev, "%s: rndis parse error %d\n", __func__, status);
- spin_unlock(&dev->lock);
-}
-
-#endif /* RNDIS */
-
-/*
- * The setup() callback implements all the ep0 functionality that's not
- * handled lower down. CDC has a number of less-common features:
- *
- * - two interfaces: control, and ethernet data
- * - Ethernet data interface has two altsettings: default, and active
- * - class-specific descriptors for the control interface
- * - class-specific control requests
- */
-static int
-eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
-{
- struct eth_dev *dev = get_gadget_data (gadget);
- struct usb_request *req = dev->req;
- int value = -EOPNOTSUPP;
- u16 wIndex = le16_to_cpu(ctrl->wIndex);
- u16 wValue = le16_to_cpu(ctrl->wValue);
- u16 wLength = le16_to_cpu(ctrl->wLength);
-
- /* descriptors just go into the pre-allocated ep0 buffer,
- * while config change events may enable network traffic.
- */
- req->complete = eth_setup_complete;
- switch (ctrl->bRequest) {
-
- case USB_REQ_GET_DESCRIPTOR:
- if (ctrl->bRequestType != USB_DIR_IN)
- break;
- switch (wValue >> 8) {
-
- case USB_DT_DEVICE:
- value = min (wLength, (u16) sizeof device_desc);
- memcpy (req->buf, &device_desc, value);
- break;
- case USB_DT_DEVICE_QUALIFIER:
- if (!gadget_is_dualspeed(gadget))
- break;
- value = min (wLength, (u16) sizeof dev_qualifier);
- memcpy (req->buf, &dev_qualifier, value);
- break;
-
- case USB_DT_OTHER_SPEED_CONFIG:
- if (!gadget_is_dualspeed(gadget))
- break;
- // FALLTHROUGH
- case USB_DT_CONFIG:
- value = config_buf(gadget, req->buf,
- wValue >> 8,
- wValue & 0xff,
- gadget_is_otg(gadget));
- if (value >= 0)
- value = min (wLength, (u16) value);
- break;
-
- case USB_DT_STRING:
- value = usb_gadget_get_string (&stringtab,
- wValue & 0xff, req->buf);
- if (value >= 0)
- value = min (wLength, (u16) value);
- break;
- }
- break;
-
- case USB_REQ_SET_CONFIGURATION:
- if (ctrl->bRequestType != 0)
- break;
- if (gadget->a_hnp_support)
- DEBUG (dev, "HNP available\n");
- else if (gadget->a_alt_hnp_support)
- DEBUG (dev, "HNP needs a different root port\n");
- spin_lock (&dev->lock);
- value = eth_set_config (dev, wValue, GFP_ATOMIC);
- spin_unlock (&dev->lock);
- break;
- case USB_REQ_GET_CONFIGURATION:
- if (ctrl->bRequestType != USB_DIR_IN)
- break;
- *(u8 *)req->buf = dev->config;
- value = min (wLength, (u16) 1);
- break;
-
- case USB_REQ_SET_INTERFACE:
- if (ctrl->bRequestType != USB_RECIP_INTERFACE
- || !dev->config
- || wIndex > 1)
- break;
- if (!cdc_active(dev) && wIndex != 0)
- break;
- spin_lock (&dev->lock);
-
- /* PXA hardware partially handles SET_INTERFACE;
- * we need to kluge around that interference.
- */
- if (gadget_is_pxa (gadget)) {
- value = eth_set_config (dev, DEV_CONFIG_VALUE,
- GFP_ATOMIC);
- goto done_set_intf;
- }
-
-#ifdef DEV_CONFIG_CDC
- switch (wIndex) {
- case 0: /* control/master intf */
- if (wValue != 0)
- break;
- if (dev->status) {
- usb_ep_disable (dev->status_ep);
- usb_ep_enable (dev->status_ep, dev->status);
- }
- value = 0;
- break;
- case 1: /* data intf */
- if (wValue > 1)
- break;
- usb_ep_disable (dev->in_ep);
- usb_ep_disable (dev->out_ep);
-
- /* CDC requires the data transfers not be done from
- * the default interface setting ... also, setting
- * the non-default interface resets filters etc.
- */
- if (wValue == 1) {
- if (!cdc_active (dev))
- break;
- usb_ep_enable (dev->in_ep, dev->in);
- usb_ep_enable (dev->out_ep, dev->out);
- dev->cdc_filter = DEFAULT_FILTER;
- netif_carrier_on (dev->net);
- if (dev->status)
- issue_start_status (dev);
- if (netif_running (dev->net)) {
- spin_unlock (&dev->lock);
- eth_start (dev, GFP_ATOMIC);
- spin_lock (&dev->lock);
- }
- } else {
- netif_stop_queue (dev->net);
- netif_carrier_off (dev->net);
- }
- value = 0;
- break;
- }
-#else
- /* FIXME this is wrong, as is the assumption that
- * all non-PXA hardware talks real CDC ...
- */
- dev_warn (&gadget->dev, "set_interface ignored!\n");
-#endif /* DEV_CONFIG_CDC */
-
-done_set_intf:
- spin_unlock (&dev->lock);
- break;
- case USB_REQ_GET_INTERFACE:
- if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
- || !dev->config
- || wIndex > 1)
- break;
- if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0)
- break;
-
- /* for CDC, iff carrier is on, data interface is active. */
- if (rndis_active(dev) || wIndex != 1)
- *(u8 *)req->buf = 0;
- else
- *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
- value = min (wLength, (u16) 1);
- break;
-
-#ifdef DEV_CONFIG_CDC
- case USB_CDC_SET_ETHERNET_PACKET_FILTER:
- /* see 6.2.30: no data, wIndex = interface,
- * wValue = packet filter bitmap
- */
- if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
- || !cdc_active(dev)
- || wLength != 0
- || wIndex > 1)
- break;
- DEBUG (dev, "packet filter %02x\n", wValue);
- dev->cdc_filter = wValue;
- value = 0;
- break;
-
- /* and potentially:
- * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
- * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_STATISTIC:
- */
-
-#endif /* DEV_CONFIG_CDC */
-
-#ifdef CONFIG_USB_ETH_RNDIS
- /* RNDIS uses the CDC command encapsulation mechanism to implement
- * an RPC scheme, with much getting/setting of attributes by OID.
- */
- case USB_CDC_SEND_ENCAPSULATED_COMMAND:
- if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
- || !rndis_active(dev)
- || wLength > USB_BUFSIZ
- || wValue
- || rndis_control_intf.bInterfaceNumber
- != wIndex)
- break;
- /* read the request, then process it */
- value = wLength;
- req->complete = rndis_command_complete;
- /* later, rndis_control_ack () sends a notification */
- break;
-
- case USB_CDC_GET_ENCAPSULATED_RESPONSE:
- if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
- == ctrl->bRequestType
- && rndis_active(dev)
- // && wLength >= 0x0400
- && !wValue
- && rndis_control_intf.bInterfaceNumber
- == wIndex) {
- u8 *buf;
- u32 n;
-
- /* return the result */
- buf = rndis_get_next_response(dev->rndis_config, &n);
- if (buf) {
- memcpy(req->buf, buf, n);
- req->complete = rndis_response_complete;
- rndis_free_response(dev->rndis_config, buf);
- value = n;
- }
- /* else stalls ... spec says to avoid that */
- }
- break;
-#endif /* RNDIS */
-
- default:
- VDEBUG (dev,
- "unknown control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- wValue, wIndex, wLength);
- }
-
- /* respond with data transfer before status phase? */
- if (value >= 0) {
- req->length = value;
- req->zero = value < wLength
- && (value % gadget->ep0->maxpacket) == 0;
- value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
- if (value < 0) {
- DEBUG (dev, "ep_queue --> %d\n", value);
- req->status = 0;
- eth_setup_complete (gadget->ep0, req);
- }
- }
-
- /* host either stalls (value < 0) or reports success */
- return value;
-}
-
-static void
-eth_disconnect (struct usb_gadget *gadget)
-{
- struct eth_dev *dev = get_gadget_data (gadget);
- unsigned long flags;
-
- spin_lock_irqsave (&dev->lock, flags);
- netif_stop_queue (dev->net);
- netif_carrier_off (dev->net);
- eth_reset_config (dev);
- spin_unlock_irqrestore (&dev->lock, flags);
-
- /* next we may get setup() calls to enumerate new connections;
- * or an unbind() during shutdown (including removing module).
- */
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
-
-static int eth_change_mtu (struct net_device *net, int new_mtu)
-{
- struct eth_dev *dev = netdev_priv(net);
-
- if (dev->rndis)
- return -EBUSY;
-
- if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
- return -ERANGE;
- /* no zero-length packet read wanted after mtu-sized packets */
- if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
- return -EDOM;
- net->mtu = new_mtu;
- return 0;
-}
-
-static struct net_device_stats *eth_get_stats (struct net_device *net)
-{
- return &((struct eth_dev *)netdev_priv(net))->stats;
-}
-
-static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
-{
- struct eth_dev *dev = netdev_priv(net);
- strlcpy(p->driver, shortname, sizeof p->driver);
- strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
- strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
- strlcpy (p->bus_info, dev_name(&dev->gadget->dev), sizeof p->bus_info);
-}
-
-static u32 eth_get_link(struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- return dev->gadget->speed != USB_SPEED_UNKNOWN;
-}
-
-static struct ethtool_ops ops = {
- .get_drvinfo = eth_get_drvinfo,
- .get_link = eth_get_link
-};
-
-static void defer_kevent (struct eth_dev *dev, int flag)
-{
- if (test_and_set_bit (flag, &dev->todo))
- return;
- if (!schedule_work (&dev->work))
- ERROR (dev, "kevent %d may have been dropped\n", flag);
- else
- DEBUG (dev, "kevent %d scheduled\n", flag);
-}
-
-static void rx_complete (struct usb_ep *ep, struct usb_request *req);
-
-static int
-rx_submit (struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
-{
- struct sk_buff *skb;
- int retval = -ENOMEM;
- size_t size;
-
- /* Padding up to RX_EXTRA handles minor disagreements with host.
- * Normally we use the USB "terminate on short read" convention;
- * so allow up to (N*maxpacket), since that memory is normally
- * already allocated. Some hardware doesn't deal well with short
- * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
- * byte off the end (to force hardware errors on overflow).
- *
- * RNDIS uses internal framing, and explicitly allows senders to
- * pad to end-of-packet. That's potentially nice for speed,
- * but means receivers can't recover synch on their own.
- */
- size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
- size += dev->out_ep->maxpacket - 1;
- if (rndis_active(dev))
- size += sizeof (struct rndis_packet_msg_type);
- size -= size % dev->out_ep->maxpacket;
-
- skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
- if (skb == NULL) {
- DEBUG (dev, "no rx skb\n");
- goto enomem;
- }
-
- /* Some platforms perform better when IP packets are aligned,
- * but on at least one, checksumming fails otherwise. Note:
- * RNDIS headers involve variable numbers of LE32 values.
- */
- skb_reserve(skb, NET_IP_ALIGN);
-
- req->buf = skb->data;
- req->length = size;
- req->complete = rx_complete;
- req->context = skb;
-
- retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
- if (retval == -ENOMEM)
-enomem:
- defer_kevent (dev, WORK_RX_MEMORY);
- if (retval) {
- DEBUG (dev, "rx submit --> %d\n", retval);
- if (skb)
- dev_kfree_skb_any(skb);
- spin_lock(&dev->req_lock);
- list_add (&req->list, &dev->rx_reqs);
- spin_unlock(&dev->req_lock);
- }
- return retval;
-}
-
-static void rx_complete (struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context;
- struct eth_dev *dev = ep->driver_data;
- int status = req->status;
-
- switch (status) {
-
- /* normal completion */
- case 0:
- skb_put (skb, req->actual);
- /* we know MaxPacketsPerTransfer == 1 here */
- if (rndis_active(dev))
- status = rndis_rm_hdr (skb);
- if (status < 0
- || ETH_HLEN > skb->len
- || skb->len > ETH_FRAME_LEN) {
- dev->stats.rx_errors++;
- dev->stats.rx_length_errors++;
- DEBUG (dev, "rx length %d\n", skb->len);
- break;
- }
-
- skb->protocol = eth_type_trans (skb, dev->net);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
-
- /* no buffer copies needed, unless hardware can't
- * use skb buffers.
- */
- status = netif_rx (skb);
- skb = NULL;
- break;
-
- /* software-driven interface shutdown */
- case -ECONNRESET: // unlink
- case -ESHUTDOWN: // disconnect etc
- VDEBUG (dev, "rx shutdown, code %d\n", status);
- goto quiesce;
-
- /* for hardware automagic (such as pxa) */
- case -ECONNABORTED: // endpoint reset
- DEBUG (dev, "rx %s reset\n", ep->name);
- defer_kevent (dev, WORK_RX_MEMORY);
-quiesce:
- dev_kfree_skb_any (skb);
- goto clean;
-
- /* data overrun */
- case -EOVERFLOW:
- dev->stats.rx_over_errors++;
- // FALLTHROUGH
-
- default:
- dev->stats.rx_errors++;
- DEBUG (dev, "rx status %d\n", status);
- break;
- }
-
- if (skb)
- dev_kfree_skb_any (skb);
- if (!netif_running (dev->net)) {
-clean:
- spin_lock(&dev->req_lock);
- list_add (&req->list, &dev->rx_reqs);
- spin_unlock(&dev->req_lock);
- req = NULL;
- }
- if (req)
- rx_submit (dev, req, GFP_ATOMIC);
-}
-
-static int prealloc (struct list_head *list, struct usb_ep *ep,
- unsigned n, gfp_t gfp_flags)
-{
- unsigned i;
- struct usb_request *req;
-
- if (!n)
- return -ENOMEM;
-
- /* queue/recycle up to N requests */
- i = n;
- list_for_each_entry (req, list, list) {
- if (i-- == 0)
- goto extra;
- }
- while (i--) {
- req = usb_ep_alloc_request (ep, gfp_flags);
- if (!req)
- return list_empty (list) ? -ENOMEM : 0;
- list_add (&req->list, list);
- }
- return 0;
-
-extra:
- /* free extras */
- for (;;) {
- struct list_head *next;
-
- next = req->list.next;
- list_del (&req->list);
- usb_ep_free_request (ep, req);
-
- if (next == list)
- break;
-
- req = container_of (next, struct usb_request, list);
- }
- return 0;
-}
-
-static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
-{
- int status;
-
- spin_lock(&dev->req_lock);
- status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
- if (status < 0)
- goto fail;
- status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
- if (status < 0)
- goto fail;
- goto done;
-fail:
- DEBUG (dev, "can't alloc requests\n");
-done:
- spin_unlock(&dev->req_lock);
- return status;
-}
-
-static void rx_fill (struct eth_dev *dev, gfp_t gfp_flags)
-{
- struct usb_request *req;
- unsigned long flags;
-
- /* fill unused rxq slots with some skb */
- spin_lock_irqsave(&dev->req_lock, flags);
- while (!list_empty (&dev->rx_reqs)) {
- req = container_of (dev->rx_reqs.next,
- struct usb_request, list);
- list_del_init (&req->list);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- if (rx_submit (dev, req, gfp_flags) < 0) {
- defer_kevent (dev, WORK_RX_MEMORY);
- return;
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- }
- spin_unlock_irqrestore(&dev->req_lock, flags);
-}
-
-static void eth_work (struct work_struct *work)
-{
- struct eth_dev *dev = container_of(work, struct eth_dev, work);
-
- if (test_and_clear_bit (WORK_RX_MEMORY, &dev->todo)) {
- if (netif_running (dev->net))
- rx_fill (dev, GFP_KERNEL);
- }
-
- if (dev->todo)
- DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
-}
-
-static void tx_complete (struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context;
- struct eth_dev *dev = ep->driver_data;
-
- switch (req->status) {
- default:
- dev->stats.tx_errors++;
- VDEBUG (dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
- case -ECONNRESET: // unlink
- case -ESHUTDOWN: // disconnect etc
- break;
- case 0:
- dev->stats.tx_bytes += skb->len;
- }
- dev->stats.tx_packets++;
-
- spin_lock(&dev->req_lock);
- list_add (&req->list, &dev->tx_reqs);
- spin_unlock(&dev->req_lock);
- dev_kfree_skb_any (skb);
-
- atomic_dec (&dev->tx_qlen);
- if (netif_carrier_ok (dev->net))
- netif_wake_queue (dev->net);
-}
-
-static inline int eth_is_promisc (struct eth_dev *dev)
-{
- /* no filters for the CDC subset; always promisc */
- if (subset_active (dev))
- return 1;
- return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
-}
-
-static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- int length = skb->len;
- int retval;
- struct usb_request *req = NULL;
- unsigned long flags;
-
- /* apply outgoing CDC or RNDIS filters */
- if (!eth_is_promisc (dev)) {
- u8 *dest = skb->data;
-
- if (is_multicast_ether_addr(dest)) {
- u16 type;
-
- /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
- * SET_ETHERNET_MULTICAST_FILTERS requests
- */
- if (is_broadcast_ether_addr(dest))
- type = USB_CDC_PACKET_TYPE_BROADCAST;
- else
- type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
- if (!(dev->cdc_filter & type)) {
- dev_kfree_skb_any (skb);
- return 0;
- }
- }
- /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- /*
- * this freelist can be empty if an interrupt triggered disconnect()
- * and reconfigured the gadget (shutting down this queue) after the
- * network stack decided to xmit but before we got the spinlock.
- */
- if (list_empty(&dev->tx_reqs)) {
- spin_unlock_irqrestore(&dev->req_lock, flags);
- return 1;
- }
-
- req = container_of (dev->tx_reqs.next, struct usb_request, list);
- list_del (&req->list);
-
- /* temporarily stop TX queue when the freelist empties */
- if (list_empty (&dev->tx_reqs))
- netif_stop_queue (net);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- /* no buffer copies needed, unless the network stack did it
- * or the hardware can't use skb buffers.
- * or there's not enough space for any RNDIS headers we need
- */
- if (rndis_active(dev)) {
- struct sk_buff *skb_rndis;
-
- skb_rndis = skb_realloc_headroom (skb,
- sizeof (struct rndis_packet_msg_type));
- if (!skb_rndis)
- goto drop;
-
- dev_kfree_skb_any (skb);
- skb = skb_rndis;
- rndis_add_hdr (skb);
- length = skb->len;
- }
- req->buf = skb->data;
- req->context = skb;
- req->complete = tx_complete;
-
- /* use zlp framing on tx for strict CDC-Ether conformance,
- * though any robust network rx path ignores extra padding.
- * and some hardware doesn't like to write zlps.
- */
- req->zero = 1;
- if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
- length++;
-
- req->length = length;
-
- /* throttle highspeed IRQ rate back slightly */
- if (gadget_is_dualspeed(dev->gadget))
- req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
- ? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
- : 0;
-
- retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
- switch (retval) {
- default:
- DEBUG (dev, "tx queue err %d\n", retval);
- break;
- case 0:
- net->trans_start = jiffies;
- atomic_inc (&dev->tx_qlen);
- }
-
- if (retval) {
-drop:
- dev->stats.tx_dropped++;
- dev_kfree_skb_any (skb);
- spin_lock_irqsave(&dev->req_lock, flags);
- if (list_empty (&dev->tx_reqs))
- netif_start_queue (net);
- list_add (&req->list, &dev->tx_reqs);
- spin_unlock_irqrestore(&dev->req_lock, flags);
- }
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_ETH_RNDIS
-
-/* The interrupt endpoint is used in RNDIS to notify the host when messages
- * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT
- * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even
- * REMOTE_NDIS_KEEPALIVE_MSG.
- *
- * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and
- * normally just one notification will be queued.
- */
-
-static struct usb_request *eth_req_alloc (struct usb_ep *, unsigned, gfp_t);
-static void eth_req_free (struct usb_ep *ep, struct usb_request *req);
-
-static void
-rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
-{
- struct eth_dev *dev = ep->driver_data;
-
- if (req->status || req->actual != req->length)
- DEBUG (dev,
- "rndis control ack complete --> %d, %d/%d\n",
- req->status, req->actual, req->length);
- req->context = NULL;
-
- if (req != dev->stat_req)
- eth_req_free(ep, req);
-}
-
-static void rndis_resp_avail(void *_dev)
-{
- struct eth_dev *dev = _dev;
- int length;
- struct usb_request *resp = dev->stat_req;
-
- /* in case RNDIS calls this after disconnect */
- if (!dev->status) {
- DEBUG (dev, "status ENODEV\n");
- return;
- }
-
- /* in case queue length > 1 */
- if (resp->context) {
- resp = eth_req_alloc (dev->status_ep, 8, GFP_ATOMIC);
- if (!resp)
- return;
- }
-
- /* Send RNDIS RESPONSE_AVAILABLE notification;
- * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
- */
- resp->length = 8;
- resp->complete = rndis_control_ack_complete;
- resp->context = dev;
-
- *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
- *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
-
- length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
- if (length < 0) {
- resp->status = 0;
- rndis_control_ack_complete (dev->status_ep, resp);
- }
-}
-
-#else
-
-#define rndis_resp_avail NULL
-
-#endif /* RNDIS */
-
-static void eth_start (struct eth_dev *dev, gfp_t gfp_flags)
-{
- DEBUG (dev, "%s\n", __func__);
-
- /* fill the rx queue */
- rx_fill (dev, gfp_flags);
-
- /* and open the tx floodgates */
- atomic_set (&dev->tx_qlen, 0);
- netif_wake_queue (dev->net);
- if (rndis_active(dev)) {
- rndis_set_param_medium (dev->rndis_config,
- NDIS_MEDIUM_802_3,
- BITRATE(dev->gadget)/100);
- (void) rndis_signal_connect (dev->rndis_config);
- }
-}
-
-static int eth_open (struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
-
- DEBUG (dev, "%s\n", __func__);
- if (netif_carrier_ok (dev->net))
- eth_start (dev, GFP_KERNEL);
- return 0;
-}
-
-static int eth_stop (struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
-
- VDEBUG (dev, "%s\n", __func__);
- netif_stop_queue (net);
-
- DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
- dev->stats.rx_packets, dev->stats.tx_packets,
- dev->stats.rx_errors, dev->stats.tx_errors
- );
-
- /* ensure there are no more active requests */
- if (dev->config) {
- usb_ep_disable (dev->in_ep);
- usb_ep_disable (dev->out_ep);
- if (netif_carrier_ok (dev->net)) {
- DEBUG (dev, "host still using in/out endpoints\n");
- // FIXME idiom may leave toggle wrong here
- usb_ep_enable (dev->in_ep, dev->in);
- usb_ep_enable (dev->out_ep, dev->out);
- }
- if (dev->status_ep) {
- usb_ep_disable (dev->status_ep);
- usb_ep_enable (dev->status_ep, dev->status);
- }
- }
-
- if (rndis_active(dev)) {
- rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
- (void) rndis_signal_disconnect (dev->rndis_config);
- }
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_request *
-eth_req_alloc (struct usb_ep *ep, unsigned size, gfp_t gfp_flags)
-{
- struct usb_request *req;
-
- req = usb_ep_alloc_request (ep, gfp_flags);
- if (!req)
- return NULL;
-
- req->buf = kmalloc (size, gfp_flags);
- if (!req->buf) {
- usb_ep_free_request (ep, req);
- req = NULL;
- }
- return req;
-}
-
-static void
-eth_req_free (struct usb_ep *ep, struct usb_request *req)
-{
- kfree (req->buf);
- usb_ep_free_request (ep, req);
-}
-
-
-static void /* __init_or_exit */
-eth_unbind (struct usb_gadget *gadget)
+static void __exit cleanup(void)
{
- struct eth_dev *dev = get_gadget_data (gadget);
-
- DEBUG (dev, "unbind\n");
- rndis_deregister (dev->rndis_config);
- rndis_exit ();
-
- /* we've already been disconnected ... no i/o is active */
- if (dev->req) {
- eth_req_free (gadget->ep0, dev->req);
- dev->req = NULL;
- }
- if (dev->stat_req) {
- eth_req_free (dev->status_ep, dev->stat_req);
- dev->stat_req = NULL;
- }
-
- unregister_netdev (dev->net);
- free_netdev(dev->net);
-
- /* assuming we used keventd, it must quiesce too */
- flush_scheduled_work ();
- set_gadget_data (gadget, NULL);
-}
-
-static u8 __init nibble (unsigned char c)
-{
- if (likely (isdigit (c)))
- return c - '0';
- c = toupper (c);
- if (likely (isxdigit (c)))
- return 10 + c - 'A';
- return 0;
-}
-
-static int __init get_ether_addr(const char *str, u8 *dev_addr)
-{
- if (str) {
- unsigned i;
-
- for (i = 0; i < 6; i++) {
- unsigned char num;
-
- if((*str == '.') || (*str == ':'))
- str++;
- num = nibble(*str++) << 4;
- num |= (nibble(*str++));
- dev_addr [i] = num;
- }
- if (is_valid_ether_addr (dev_addr))
- return 0;
- }
- random_ether_addr(dev_addr);
- return 1;
-}
-
-static int __init
-eth_bind (struct usb_gadget *gadget)
-{
- struct eth_dev *dev;
- struct net_device *net;
- u8 cdc = 1, zlp = 1, rndis = 1;
- struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
- int status = -ENOMEM;
- int gcnum;
-
- /* these flags are only ever cleared; compiler take note */
-#ifndef DEV_CONFIG_CDC
- cdc = 0;
-#endif
-#ifndef CONFIG_USB_ETH_RNDIS
- rndis = 0;
-#endif
-
- /* Because most host side USB stacks handle CDC Ethernet, that
- * standard protocol is _strongly_ preferred for interop purposes.
- * (By everyone except Microsoft.)
- */
- if (gadget_is_pxa (gadget)) {
- /* pxa doesn't support altsettings */
- cdc = 0;
- } else if (gadget_is_musbhdrc(gadget)) {
- /* reduce tx dma overhead by avoiding special cases */
- zlp = 0;
- } else if (gadget_is_sh(gadget)) {
- /* sh doesn't support multiple interfaces or configs */
- cdc = 0;
- rndis = 0;
- } else if (gadget_is_sa1100 (gadget)) {
- /* hardware can't write zlps */
- zlp = 0;
- /* sa1100 CAN do CDC, without status endpoint ... we use
- * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
- */
- cdc = 0;
- }
-
- gcnum = usb_gadget_controller_number (gadget);
- if (gcnum >= 0)
- device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
- else {
- /* can't assume CDC works. don't want to default to
- * anything less functional on CDC-capable hardware,
- * so we fail in this case.
- */
- dev_err (&gadget->dev,
- "controller '%s' not recognized\n",
- gadget->name);
- return -ENODEV;
- }
- snprintf (manufacturer, sizeof manufacturer, "%s %s/%s",
- init_utsname()->sysname, init_utsname()->release,
- gadget->name);
-
- /* If there's an RNDIS configuration, that's what Windows wants to
- * be using ... so use these product IDs here and in the "linux.inf"
- * needed to install MSFT drivers. Current Linux kernels will use
- * the second configuration if it's CDC Ethernet, and need some help
- * to choose the right configuration otherwise.
- */
- if (rndis) {
- device_desc.idVendor =
- __constant_cpu_to_le16(RNDIS_VENDOR_NUM);
- device_desc.idProduct =
- __constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
- snprintf (product_desc, sizeof product_desc,
- "RNDIS/%s", driver_desc);
-
- /* CDC subset ... recognized by Linux since 2.4.10, but Windows
- * drivers aren't widely available. (That may be improved by
- * supporting one submode of the "SAFE" variant of MDLM.)
- */
- } else if (!cdc) {
- device_desc.idVendor =
- __constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
- device_desc.idProduct =
- __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
- }
-
- /* support optional vendor/distro customization */
- if (idVendor) {
- if (!idProduct) {
- dev_err (&gadget->dev, "idVendor needs idProduct!\n");
- return -ENODEV;
- }
- device_desc.idVendor = cpu_to_le16(idVendor);
- device_desc.idProduct = cpu_to_le16(idProduct);
- if (bcdDevice)
- device_desc.bcdDevice = cpu_to_le16(bcdDevice);
- }
- if (iManufacturer)
- strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
- if (iProduct)
- strlcpy (product_desc, iProduct, sizeof product_desc);
- if (iSerialNumber) {
- device_desc.iSerialNumber = STRING_SERIALNUMBER,
- strlcpy(serial_number, iSerialNumber, sizeof serial_number);
- }
-
- /* all we really need is bulk IN/OUT */
- usb_ep_autoconfig_reset (gadget);
- in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
- if (!in_ep) {
-autoconf_fail:
- dev_err (&gadget->dev,
- "can't autoconfigure on %s\n",
- gadget->name);
- return -ENODEV;
- }
- in_ep->driver_data = in_ep; /* claim */
-
- out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
- if (!out_ep)
- goto autoconf_fail;
- out_ep->driver_data = out_ep; /* claim */
-
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
- /* CDC Ethernet control interface doesn't require a status endpoint.
- * Since some hosts expect one, try to allocate one anyway.
- */
- if (cdc || rndis) {
- status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
- if (status_ep) {
- status_ep->driver_data = status_ep; /* claim */
- } else if (rndis) {
- dev_err (&gadget->dev,
- "can't run RNDIS on %s\n",
- gadget->name);
- return -ENODEV;
-#ifdef DEV_CONFIG_CDC
- /* pxa25x only does CDC subset; often used with RNDIS */
- } else if (cdc) {
- control_intf.bNumEndpoints = 0;
- /* FIXME remove endpoint from descriptor list */
-#endif
- }
- }
-#endif
-
- /* one config: cdc, else minimal subset */
- if (!cdc) {
- eth_config.bNumInterfaces = 1;
- eth_config.iConfiguration = STRING_SUBSET;
-
- /* use functions to set these up, in case we're built to work
- * with multiple controllers and must override CDC Ethernet.
- */
- fs_subset_descriptors();
- hs_subset_descriptors();
- }
-
- device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
- usb_gadget_set_selfpowered (gadget);
-
- /* For now RNDIS is always a second config */
- if (rndis)
- device_desc.bNumConfigurations = 2;
-
- if (gadget_is_dualspeed(gadget)) {
- if (rndis)
- dev_qualifier.bNumConfigurations = 2;
- else if (!cdc)
- dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
-
- /* assumes ep0 uses the same value for both speeds ... */
- dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
-
- /* and that all endpoints are dual-speed */
- hs_source_desc.bEndpointAddress =
- fs_source_desc.bEndpointAddress;
- hs_sink_desc.bEndpointAddress =
- fs_sink_desc.bEndpointAddress;
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
- if (status_ep)
- hs_status_desc.bEndpointAddress =
- fs_status_desc.bEndpointAddress;
-#endif
- }
-
- if (gadget_is_otg(gadget)) {
- otg_descriptor.bmAttributes |= USB_OTG_HNP,
- eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
- eth_config.bMaxPower = 4;
-#ifdef CONFIG_USB_ETH_RNDIS
- rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
- rndis_config.bMaxPower = 4;
-#endif
- }
-
- net = alloc_etherdev (sizeof *dev);
- if (!net)
- return status;
- dev = netdev_priv(net);
- spin_lock_init (&dev->lock);
- spin_lock_init (&dev->req_lock);
- INIT_WORK (&dev->work, eth_work);
- INIT_LIST_HEAD (&dev->tx_reqs);
- INIT_LIST_HEAD (&dev->rx_reqs);
-
- /* network device setup */
- dev->net = net;
- strcpy (net->name, "usb%d");
- dev->cdc = cdc;
- dev->zlp = zlp;
-
- dev->in_ep = in_ep;
- dev->out_ep = out_ep;
- dev->status_ep = status_ep;
-
- /* Module params for these addresses should come from ID proms.
- * The host side address is used with CDC and RNDIS, and commonly
- * ends up in a persistent config database. It's not clear if
- * host side code for the SAFE thing cares -- its original BLAN
- * thing didn't, Sharp never assigned those addresses on Zaurii.
- */
- if (get_ether_addr(dev_addr, net->dev_addr))
- dev_warn(&gadget->dev,
- "using random %s ethernet address\n", "self");
- if (get_ether_addr(host_addr, dev->host_mac))
- dev_warn(&gadget->dev,
- "using random %s ethernet address\n", "host");
- snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
- dev->host_mac [0], dev->host_mac [1],
- dev->host_mac [2], dev->host_mac [3],
- dev->host_mac [4], dev->host_mac [5]);
-
- if (rndis) {
- status = rndis_init();
- if (status < 0) {
- dev_err (&gadget->dev, "can't init RNDIS, %d\n",
- status);
- goto fail;
- }
- }
-
- net->change_mtu = eth_change_mtu;
- net->get_stats = eth_get_stats;
- net->hard_start_xmit = eth_start_xmit;
- net->open = eth_open;
- net->stop = eth_stop;
- // watchdog_timeo, tx_timeout ...
- // set_multicast_list
- SET_ETHTOOL_OPS(net, &ops);
-
- /* preallocate control message data and buffer */
- dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ, GFP_KERNEL);
- if (!dev->req)
- goto fail;
- dev->req->complete = eth_setup_complete;
-
- /* ... and maybe likewise for status transfer */
-#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
- if (dev->status_ep) {
- dev->stat_req = eth_req_alloc (dev->status_ep,
- STATUS_BYTECOUNT, GFP_KERNEL);
- if (!dev->stat_req) {
- eth_req_free (gadget->ep0, dev->req);
- goto fail;
- }
- dev->stat_req->context = NULL;
- }
-#endif
-
- /* finish hookup to lower layer ... */
- dev->gadget = gadget;
- set_gadget_data (gadget, dev);
- gadget->ep0->driver_data = dev;
-
- /* two kinds of host-initiated state changes:
- * - iff DATA transfer is active, carrier is "on"
- * - tx queueing enabled if open *and* carrier is "on"
- */
- netif_stop_queue (dev->net);
- netif_carrier_off (dev->net);
-
- SET_NETDEV_DEV (dev->net, &gadget->dev);
- status = register_netdev (dev->net);
- if (status < 0)
- goto fail1;
-
- INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
- INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
- out_ep->name, in_ep->name,
- status_ep ? " STATUS " : "",
- status_ep ? status_ep->name : ""
- );
- INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
- net->dev_addr [0], net->dev_addr [1],
- net->dev_addr [2], net->dev_addr [3],
- net->dev_addr [4], net->dev_addr [5]);
-
- if (cdc || rndis)
- INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
- dev->host_mac [0], dev->host_mac [1],
- dev->host_mac [2], dev->host_mac [3],
- dev->host_mac [4], dev->host_mac [5]);
-
- if (rndis) {
- u32 vendorID = 0;
-
- /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
-
- status = rndis_register(rndis_resp_avail, dev);
- if (status < 0) {
-fail0:
- unregister_netdev (dev->net);
- goto fail;
- }
- dev->rndis_config = status;
-
- /* these set up a lot of the OIDs that RNDIS needs */
- rndis_set_host_mac (dev->rndis_config, dev->host_mac);
- if (rndis_set_param_dev (dev->rndis_config, dev->net,
- &dev->cdc_filter))
- goto fail0;
- if (rndis_set_param_vendor(dev->rndis_config, vendorID,
- manufacturer))
- goto fail0;
- if (rndis_set_param_medium(dev->rndis_config,
- NDIS_MEDIUM_802_3, 0))
- goto fail0;
- INFO (dev, "RNDIS ready\n");
- }
-
- return status;
-
-fail1:
- dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status);
-fail:
- eth_unbind (gadget);
- return status;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void
-eth_suspend (struct usb_gadget *gadget)
-{
- struct eth_dev *dev = get_gadget_data (gadget);
-
- DEBUG (dev, "suspend\n");
- dev->suspended = 1;
-}
-
-static void
-eth_resume (struct usb_gadget *gadget)
-{
- struct eth_dev *dev = get_gadget_data (gadget);
-
- DEBUG (dev, "resume\n");
- dev->suspended = 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_gadget_driver eth_driver = {
- .speed = DEVSPEED,
-
- .function = (char *) driver_desc,
- .bind = eth_bind,
- .unbind = eth_unbind,
-
- .setup = eth_setup,
- .disconnect = eth_disconnect,
-
- .suspend = eth_suspend,
- .resume = eth_resume,
-
- .driver = {
- .name = (char *) shortname,
- .owner = THIS_MODULE,
- },
-};
-
-MODULE_DESCRIPTION (DRIVER_DESC);
-MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
-MODULE_LICENSE ("GPL");
-
-
-static int __init init (void)
-{
- return usb_gadget_register_driver (ð_driver);
+ usb_composite_unregister(ð_driver);
}
-module_init (init);
-
-static void __exit cleanup (void)
-{
- usb_gadget_unregister_driver (ð_driver);
-}
-module_exit (cleanup);
-
+module_exit(cleanup);
projects / linux-2.6-omap-h63xx.git / blobdiff