Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
new file mode 100644
index 0000000..cff9fb0
--- /dev/null
+++ b/drivers/usb/gadget/ether.c
@@ -0,0 +1,2660 @@
+/*
+ * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
+ *
+ * Copyright (C) 2003-2005 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+// #define DEBUG 1
+// #define VERBOSE
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/utsname.h>
+#include <linux/device.h>
+#include <linux/moduleparam.h>
+#include <linux/ctype.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <linux/usb_ch9.h>
+#include <linux/usb_cdc.h>
+#include <linux/usb_gadget.h>
+
+#include <linux/random.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+
+#include "gadget_chips.h"
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Ethernet gadget driver -- with CDC and non-CDC options
+ * Builds on hardware support for a full duplex link.
+ *
+ * CDC Ethernet is the standard USB solution for sending Ethernet frames
+ * using USB. Real hardware tends to use the same framing protocol but look
+ * different for control features. This driver strongly prefers to use
+ * 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
+ * implement a "minimalist" vendor-agnostic CDC core: same framing, but
+ * link-level setup only requires activating the configuration.
+ * Linux supports it, but other host operating systems may not.
+ * (This is a subset of CDC Ethernet.)
+ *
+ * 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.
+ */
+
+#define DRIVER_DESC "Ethernet Gadget"
+#define DRIVER_VERSION "Equinox 2004"
+
+static const char shortname [] = "ether";
+static const char driver_desc [] = DRIVER_DESC;
+
+#define RX_EXTRA 20 /* guard against rx overflows */
+
+#ifdef CONFIG_USB_ETH_RNDIS
+#include "rndis.h"
+#else
+#define rndis_init() 0
+#define rndis_exit() do{}while(0)
+#endif
+
+/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
+#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
+ |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;
+ 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.
+ *
+ * It also ASSUMES a self-powered device, without remote wakeup,
+ * although remote wakeup support would make sense.
+ */
+static const char *EP_IN_NAME;
+static const char *EP_OUT_NAME;
+static const char *EP_STATUS_NAME;
+
+/*-------------------------------------------------------------------------*/
+
+/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
+ */
+
+/* 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 */
+
+/* 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
+ * with pxa250. We're protocol-compatible, if the host-side drivers
+ * use the endpoint descriptors. bcdDevice (version) is nonzero, so
+ * drivers that need to hard-wire endpoint numbers have a hook.
+ *
+ * The protocol is a minimal subset of CDC Ether, which works on any bulk
+ * hardware that's not deeply broken ... even on hardware that can't talk
+ * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
+ * doesn't handle control-OUT).
+ */
+#define SIMPLE_VENDOR_NUM 0x049f
+#define SIMPLE_PRODUCT_NUM 0x505a
+
+/* For hardware that can talk RNDIS and either of the above protocols,
+ * use this ID ... the windows INF files will know it. Unless it's
+ * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
+ * the non-RNDIS configuration.
+ */
+#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 __initdata idVendor;
+module_param(idVendor, ushort, S_IRUGO);
+MODULE_PARM_DESC(idVendor, "USB Vendor ID");
+
+static ushort __initdata idProduct;
+module_param(idProduct, ushort, S_IRUGO);
+MODULE_PARM_DESC(idProduct, "USB Product ID");
+
+static ushort __initdata bcdDevice;
+module_param(bcdDevice, ushort, S_IRUGO);
+MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
+
+static char *__initdata iManufacturer;
+module_param(iManufacturer, charp, S_IRUGO);
+MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
+
+static char *__initdata iProduct;
+module_param(iProduct, charp, S_IRUGO);
+MODULE_PARM_DESC(iProduct, "USB Product string");
+
+/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
+static char *__initdata 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 *__initdata 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_PXA27X
+#define DEV_CONFIG_CDC
+#endif
+
+#ifdef CONFIG_USB_GADGET_AT91
+#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_PXA2XX
+#define DEV_CONFIG_SUBSET
+#endif
+
+#ifdef CONFIG_USB_GADGET_SH
+#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_S3C2410
+#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
+
+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))
+
+/* also defer IRQs on highspeed TX */
+#define TX_DELAY qmult
+
+#define BITRATE(g) (((g)->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS)
+
+#else /* full speed (low speed doesn't do bulk) */
+#define qlen(gadget) DEFAULT_QLEN
+
+#define BITRATE(g) 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
+#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 USB_BUFSIZ 256 /* holds our biggest descriptor */
+
+/*
+ * 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 = {
+ .bLength = sizeof device_desc,
+ .bDescriptorType = USB_DT_DEVICE,
+
+ .bcdUSB = __constant_cpu_to_le16 (0x0200),
+
+ .bDeviceClass = USB_CLASS_COMM,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+
+ .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
+ .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
+ .iManufacturer = STRING_MANUFACTURER,
+ .iProduct = STRING_PRODUCT,
+ .bNumConfigurations = 1,
+};
+
+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.
+ */
+
+#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,
+};
+#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,
+};
+#endif
+
+#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
+
+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),
+};
+
+static const struct usb_cdc_union_desc union_desc = {
+ .bLength = sizeof union_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+
+ .bMasterInterface0 = 0, /* index of control interface */
+ .bSlaveInterface0 = 1, /* index of DATA interface */
+};
+
+#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_cdc_acm_descriptor acm_descriptor = {
+ .bLength = sizeof acm_descriptor,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ACM_TYPE,
+
+ .bmCapabilities = 0x00,
+};
+
+#endif
+
+#ifdef DEV_CONFIG_CDC
+
+static const struct usb_cdc_ether_desc ether_desc = {
+ .bLength = sizeof ether_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
+
+ /* 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,
+};
+
+#endif
+
+#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 cancelation; 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.
+ */
+
+#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 ... */
+
+static const struct usb_interface_descriptor
+data_nop_intf = {
+ .bLength = sizeof data_nop_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+};
+
+/* ... 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,
+};
+
+#endif
+
+#ifdef CONFIG_USB_ETH_RNDIS
+
+/* RNDIS doesn't activate by changing to the "real" altsetting */
+
+static const struct usb_interface_descriptor
+rndis_data_intf = {
+ .bLength = sizeof rndis_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ .iInterface = STRING_DATA,
+};
+
+#endif
+
+#ifdef DEV_CONFIG_SUBSET
+
+/*
+ * "Simple" CDC-subset option is a simple vendor-neutral model that most
+ * full speed controllers can handle: one interface, two bulk endpoints.
+ */
+
+static const struct usb_interface_descriptor
+subset_data_intf = {
+ .bLength = sizeof subset_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 0,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ .iInterface = STRING_DATA,
+};
+
+#endif /* SUBSET */
+
+
+static struct usb_endpoint_descriptor
+fs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor
+fs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+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 */
+};
+
+static inline void __init fs_subset_descriptors(void)
+{
+#ifdef DEV_CONFIG_SUBSET
+ fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
+ fs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
+ fs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
+ fs_eth_function[4] = NULL;
+#else
+ fs_eth_function[1] = NULL;
+#endif
+}
+
+#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
+
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+
+/*
+ * 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
+ hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
+ hs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
+ hs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
+ hs_eth_function[4] = 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. */
+#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
+
+#else
+
+/* if there's no high speed support, maxpacket doesn't change. */
+#define ep_desc(g,hs,fs) fs
+
+static inline void __init hs_subset_descriptors(void)
+{
+}
+
+#endif /* !CONFIG_USB_GADGET_DUALSPEED */
+
+/*-------------------------------------------------------------------------*/
+
+/* descriptors that are built on-demand */
+
+static char manufacturer [50];
+static char product_desc [40] = DRIVER_DESC;
+
+#ifdef DEV_CONFIG_CDC
+/* address that the host will use ... usually assigned at random */
+static char ethaddr [2 * ETH_ALEN + 1];
+#endif
+
+/* static strings, in UTF-8 */
+static struct usb_string strings [] = {
+ { STRING_MANUFACTURER, manufacturer, },
+ { STRING_PRODUCT, product_desc, },
+ { STRING_DATA, "Ethernet Data", },
+#ifdef DEV_CONFIG_CDC
+ { STRING_CDC, "CDC Ethernet", },
+ { STRING_ETHADDR, ethaddr, },
+ { 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 (enum usb_device_speed speed,
+ u8 *buf, u8 type,
+ unsigned index, int is_otg)
+{
+ int len;
+ const struct usb_config_descriptor *config;
+ const struct usb_descriptor_header **function;
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+ int hs = (speed == USB_SPEED_HIGH);
+
+ if (type == USB_DT_OTHER_SPEED_CONFIG)
+ hs = !hs;
+#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
+#else
+#define which_fn(t) (fs_ ## t ## _function)
+#endif
+
+ 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, int gfp_flags);
+static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags);
+
+#ifdef DEV_CONFIG_CDC
+static inline int ether_alt_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
+{
+ const struct usb_endpoint_descriptor *d;
+
+ /* 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.
+ */
+
+ /* one endpoint writes data back IN to the host */
+ if (strcmp (ep->name, EP_IN_NAME) == 0) {
+ d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
+ ep->driver_data = dev;
+ dev->in = d;
+
+ /* one endpoint just reads OUT packets */
+ } else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
+ d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
+ ep->driver_data = dev;
+ dev->out = d;
+
+ /* optional status/notification endpoint */
+ } else if (EP_STATUS_NAME &&
+ strcmp (ep->name, EP_STATUS_NAME) == 0) {
+ int result;
+
+ d = ep_desc (dev->gadget, &hs_status_desc, &fs_status_desc);
+ result = usb_ep_enable (ep, d);
+ if (result < 0)
+ return result;
+
+ ep->driver_data = dev;
+ dev->status = d;
+ }
+ return 0;
+}
+#endif
+
+#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
+static inline int ether_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
+{
+ int result;
+ const struct usb_endpoint_descriptor *d;
+
+ /* CDC subset is simpler: if the device is there,
+ * it's live with rx and tx endpoints.
+ *
+ * Do this as a shortcut for RNDIS too.
+ */
+
+ /* one endpoint writes data back IN to the host */
+ if (strcmp (ep->name, EP_IN_NAME) == 0) {
+ d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
+ result = usb_ep_enable (ep, d);
+ if (result < 0)
+ return result;
+
+ ep->driver_data = dev;
+ dev->in = d;
+
+ /* one endpoint just reads OUT packets */
+ } else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
+ d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
+ result = usb_ep_enable (ep, d);
+ if (result < 0)
+ return result;
+
+ ep->driver_data = dev;
+ dev->out = d;
+ }
+
+ return 0;
+}
+#endif
+
+static int
+set_ether_config (struct eth_dev *dev, int gfp_flags)
+{
+ int result = 0;
+ struct usb_ep *ep;
+ struct usb_gadget *gadget = dev->gadget;
+
+ gadget_for_each_ep (ep, gadget) {
+#ifdef DEV_CONFIG_CDC
+ if (!dev->rndis && dev->cdc) {
+ result = ether_alt_ep_setup (dev, ep);
+ if (result == 0)
+ continue;
+ }
+#endif
+
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (dev->rndis && strcmp (ep->name, EP_STATUS_NAME) == 0) {
+ const struct usb_endpoint_descriptor *d;
+ d = ep_desc (gadget, &hs_status_desc, &fs_status_desc);
+ result = usb_ep_enable (ep, d);
+ if (result == 0) {
+ ep->driver_data = dev;
+ dev->status = d;
+ continue;
+ }
+ } else
+#endif
+
+ {
+#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
+ result = ether_ep_setup (dev, ep);
+ if (result == 0)
+ continue;
+#endif
+ }
+
+ /* stop on error */
+ ERROR (dev, "can't enable %s, result %d\n", ep->name, result);
+ break;
+ }
+ if (!result && (!dev->in_ep || !dev->out_ep))
+ result = -ENODEV;
+
+ if (result == 0)
+ result = alloc_requests (dev, qlen (gadget), gfp_flags);
+
+ /* on error, disable any endpoints */
+ if (result < 0) {
+#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
+ if (dev->status)
+ (void) usb_ep_disable (dev->status_ep);
+#endif
+ dev->status = NULL;
+#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
+ if (dev->rndis || !dev->cdc) {
+ if (dev->in)
+ (void) usb_ep_disable (dev->in_ep);
+ if (dev->out)
+ (void) usb_ep_disable (dev->out_ep);
+ }
+#endif
+ dev->in = NULL;
+ dev->out = NULL;
+ } else
+
+ /* activate non-CDC configs right away
+ * this isn't strictly according to the RNDIS spec
+ */
+#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
+ if (dev->rndis || !dev->cdc) {
+ netif_carrier_on (dev->net);
+ if (netif_running (dev->net)) {
+ spin_unlock (&dev->lock);
+ eth_start (dev, GFP_ATOMIC);
+ spin_lock (&dev->lock);
+ }
+ }
+#endif
+
+ 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", __FUNCTION__);
+
+ netif_stop_queue (dev->net);
+ netif_carrier_off (dev->net);
+
+ /* disable endpoints, forcing (synchronous) completion of
+ * pending i/o. then free the requests.
+ */
+ if (dev->in) {
+ usb_ep_disable (dev->in_ep);
+ while (likely (!list_empty (&dev->tx_reqs))) {
+ req = container_of (dev->tx_reqs.next,
+ struct usb_request, list);
+ list_del (&req->list);
+ usb_ep_free_request (dev->in_ep, req);
+ }
+ }
+ if (dev->out) {
+ usb_ep_disable (dev->out_ep);
+ while (likely (!list_empty (&dev->rx_reqs))) {
+ req = container_of (dev->rx_reqs.next,
+ struct usb_request, list);
+ list_del (&req->list);
+ usb_ep_free_request (dev->out_ep, req);
+ }
+ }
+
+ if (dev->status) {
+ usb_ep_disable (dev->status_ep);
+ }
+ 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, int gfp_flags)
+{
+ int result = 0;
+ struct usb_gadget *gadget = dev->gadget;
+
+ if (number == dev->config)
+ return 0;
+
+ 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);
+
+ /* default: pass all packets, no multicast filtering */
+ dev->cdc_filter = 0x000f;
+
+ switch (number) {
+ case DEV_CONFIG_VALUE:
+ dev->rndis = 0;
+ 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,
+ dev->gadget->is_otg ? 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,
+ dev->rndis
+ ? "RNDIS"
+ : (dev->cdc
+ ? "CDC Ethernet"
+ : "CDC Ethernet Subset"));
+ }
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef DEV_CONFIG_CDC
+
+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);
+ event->bmRequestType = 0xff;
+}
+
+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", __FUNCTION__);
+
+ /* 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...
+ */
+ 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;
+ 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", __FUNCTION__, 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 = ctrl->wIndex;
+ u16 wValue = ctrl->wValue;
+ u16 wLength = 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;
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+ case USB_DT_DEVICE_QUALIFIER:
+ if (!gadget->is_dualspeed)
+ 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)
+ break;
+ // FALLTHROUGH
+#endif /* CONFIG_USB_GADGET_DUALSPEED */
+ case USB_DT_CONFIG:
+ value = config_buf (gadget->speed, req->buf,
+ wValue >> 8,
+ wValue & 0xff,
+ gadget->is_otg);
+ 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 (!dev->cdc && 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 clears filters etc.
+ */
+ if (wValue == 1) {
+ 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 (!(dev->cdc || dev->rndis) && wIndex != 0)
+ break;
+
+ /* for CDC, iff carrier is on, data interface is active. */
+ if (dev->rndis || 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)
+ || !dev->cdc
+ || dev->rndis
+ || 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)
+ || !dev->rndis
+ || 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
+ && dev->rndis
+ // && wLength >= 0x0400
+ && !wValue
+ && rndis_control_intf.bInterfaceNumber
+ == wIndex) {
+ u8 *buf;
+
+ /* return the result */
+ buf = rndis_get_next_response (dev->rndis_config,
+ &value);
+ if (buf) {
+ memcpy (req->buf, buf, value);
+ req->complete = rndis_response_complete;
+ rndis_free_response(dev->rndis_config, buf);
+ }
+ /* 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);
+
+ /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
+
+ /* 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);
+
+ // FIXME if rndis, don't change while link's live
+
+ 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->gadget->dev.bus_id, 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, int 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;
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (dev->rndis)
+ size += sizeof (struct rndis_packet_msg_type);
+#endif
+ size -= size % dev->out_ep->maxpacket;
+
+ if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) {
+ 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:
+ * this doesn't account for variable-sized RNDIS headers.
+ */
+ 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);
+ dev_kfree_skb_any (skb);
+ spin_lock (&dev->lock);
+ list_add (&req->list, &dev->rx_reqs);
+ spin_unlock (&dev->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);
+#ifdef CONFIG_USB_ETH_RNDIS
+ /* we know MaxPacketsPerTransfer == 1 here */
+ if (dev->rndis)
+ rndis_rm_hdr (req->buf, &(skb->len));
+#endif
+ if (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->dev = dev->net;
+ 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:
+ /* nobody reading rx_reqs, so no dev->lock */
+ list_add (&req->list, &dev->rx_reqs);
+ req = NULL;
+ }
+ if (req)
+ rx_submit (dev, req, GFP_ATOMIC);
+}
+
+static int prealloc (struct list_head *list, struct usb_ep *ep,
+ unsigned n, int 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, int gfp_flags)
+{
+ int status;
+
+ 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;
+ return 0;
+fail:
+ DEBUG (dev, "can't alloc requests\n");
+ return status;
+}
+
+static void rx_fill (struct eth_dev *dev, int gfp_flags)
+{
+ struct usb_request *req;
+ unsigned long flags;
+
+ clear_bit (WORK_RX_MEMORY, &dev->todo);
+
+ /* fill unused rxq slots with some skb */
+ spin_lock_irqsave (&dev->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->lock, flags);
+
+ if (rx_submit (dev, req, gfp_flags) < 0) {
+ defer_kevent (dev, WORK_RX_MEMORY);
+ return;
+ }
+
+ spin_lock_irqsave (&dev->lock, flags);
+ }
+ spin_unlock_irqrestore (&dev->lock, flags);
+}
+
+static void eth_work (void *_dev)
+{
+ struct eth_dev *dev = _dev;
+
+ if (test_bit (WORK_RX_MEMORY, &dev->todo)) {
+ if (netif_running (dev->net))
+ rx_fill (dev, GFP_KERNEL);
+ else
+ clear_bit (WORK_RX_MEMORY, &dev->todo);
+ }
+
+ 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->lock);
+ list_add (&req->list, &dev->tx_reqs);
+ spin_unlock (&dev->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 (dest [0] & 0x01) {
+ u16 type;
+
+ /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
+ * SET_ETHERNET_MULTICAST_FILTERS requests
+ */
+ if (memcmp (dest, net->broadcast, ETH_ALEN) == 0)
+ 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->lock, flags);
+ req = container_of (dev->tx_reqs.next, struct usb_request, list);
+ list_del (&req->list);
+ if (list_empty (&dev->tx_reqs))
+ netif_stop_queue (net);
+ spin_unlock_irqrestore (&dev->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
+ */
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (dev->rndis) {
+ 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;
+ }
+#endif
+ 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;
+
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+ /* throttle highspeed IRQ rate back slightly */
+ req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
+ ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
+ : 0;
+#endif
+
+ 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) {
+#ifdef CONFIG_USB_ETH_RNDIS
+drop:
+#endif
+ dev->stats.tx_dropped++;
+ dev_kfree_skb_any (skb);
+ spin_lock_irqsave (&dev->lock, flags);
+ if (list_empty (&dev->tx_reqs))
+ netif_start_queue (net);
+ list_add (&req->list, &dev->tx_reqs);
+ spin_unlock_irqrestore (&dev->lock, flags);
+ }
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_ETH_RNDIS
+
+static void rndis_send_media_state (struct eth_dev *dev, int connect)
+{
+ if (!dev)
+ return;
+
+ if (connect) {
+ if (rndis_signal_connect (dev->rndis_config))
+ return;
+ } else {
+ if (rndis_signal_disconnect (dev->rndis_config))
+ return;
+ }
+}
+
+static void
+rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
+{
+ if (req->status || req->actual != req->length)
+ DEBUG ((struct eth_dev *) ep->driver_data,
+ "rndis control ack complete --> %d, %d/%d\n",
+ req->status, req->actual, req->length);
+
+ usb_ep_free_buffer(ep, req->buf, req->dma, 8);
+ usb_ep_free_request(ep, req);
+}
+
+static int rndis_control_ack (struct net_device *net)
+{
+ struct eth_dev *dev = netdev_priv(net);
+ u32 length;
+ struct usb_request *resp;
+
+ /* in case RNDIS calls this after disconnect */
+ if (!dev->status_ep) {
+ DEBUG (dev, "status ENODEV\n");
+ return -ENODEV;
+ }
+
+ /* Allocate memory for notification ie. ACK */
+ resp = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC);
+ if (!resp) {
+ DEBUG (dev, "status ENOMEM\n");
+ return -ENOMEM;
+ }
+
+ resp->buf = usb_ep_alloc_buffer (dev->status_ep, 8,
+ &resp->dma, GFP_ATOMIC);
+ if (!resp->buf) {
+ DEBUG (dev, "status buf ENOMEM\n");
+ usb_ep_free_request (dev->status_ep, resp);
+ return -ENOMEM;
+ }
+
+ /* Send RNDIS RESPONSE_AVAILABLE notification;
+ * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
+ */
+ resp->length = 8;
+ resp->complete = rndis_control_ack_complete;
+
+ *((__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);
+ }
+
+ return 0;
+}
+
+#endif /* RNDIS */
+
+static void eth_start (struct eth_dev *dev, int gfp_flags)
+{
+ DEBUG (dev, "%s\n", __FUNCTION__);
+
+ /* 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);
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (dev->rndis) {
+ rndis_set_param_medium (dev->rndis_config,
+ NDIS_MEDIUM_802_3,
+ BITRATE(dev->gadget));
+ rndis_send_media_state (dev, 1);
+ }
+#endif
+}
+
+static int eth_open (struct net_device *net)
+{
+ struct eth_dev *dev = netdev_priv(net);
+
+ DEBUG (dev, "%s\n", __FUNCTION__);
+ 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", __FUNCTION__);
+ 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);
+ }
+ }
+
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (dev->rndis) {
+ rndis_set_param_medium (dev->rndis_config,
+ NDIS_MEDIUM_802_3, 0);
+ rndis_send_media_state (dev, 0);
+ }
+#endif
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_request *eth_req_alloc (struct usb_ep *ep, unsigned size)
+{
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request (ep, GFP_KERNEL);
+ if (!req)
+ return NULL;
+
+ req->buf = kmalloc (size, GFP_KERNEL);
+ 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
+eth_unbind (struct usb_gadget *gadget)
+{
+ struct eth_dev *dev = get_gadget_data (gadget);
+
+ DEBUG (dev, "unbind\n");
+#ifdef CONFIG_USB_ETH_RNDIS
+ rndis_deregister (dev->rndis_config);
+ rndis_exit ();
+#endif
+
+ /* 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 void __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;
+ }
+ random_ether_addr(dev_addr);
+}
+
+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;
+
+ /* 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_net2280 (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
+ } else if (gadget_is_dummy (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202);
+ } else if (gadget_is_pxa (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
+ /* pxa doesn't support altsettings */
+ cdc = 0;
+ } else if (gadget_is_sh(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
+ /* sh doesn't support multiple interfaces or configs */
+ cdc = 0;
+ rndis = 0;
+ } else if (gadget_is_sa1100 (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
+ /* 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;
+ } else if (gadget_is_goku (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
+ } else if (gadget_is_mq11xx (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
+ } else if (gadget_is_omap (gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
+ } else if (gadget_is_lh7a40x(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
+ } else if (gadget_is_n9604(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
+ } else if (gadget_is_pxa27x(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
+ } else if (gadget_is_s3c2410(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
+ } else if (gadget_is_at91(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
+ } 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",
+ system_utsname.sysname, system_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.
+ */
+ } else if (!cdc) {
+ device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
+ 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);
+
+ /* 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;
+ }
+ EP_IN_NAME = in_ep->name;
+ in_ep->driver_data = in_ep; /* claim */
+
+ out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
+ if (!out_ep)
+ goto autoconf_fail;
+ EP_OUT_NAME = out_ep->name;
+ 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) {
+ EP_STATUS_NAME = status_ep->name;
+ 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;
+ fs_subset_descriptors();
+ hs_subset_descriptors();
+ }
+
+ /* For now RNDIS is always a second config */
+ if (rndis)
+ device_desc.bNumConfigurations = 2;
+
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+ 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 (EP_STATUS_NAME)
+ hs_status_desc.bEndpointAddress =
+ fs_status_desc.bEndpointAddress;
+#endif
+#endif /* DUALSPEED */
+
+ device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
+ usb_gadget_set_selfpowered (gadget);
+
+ if (gadget->is_otg) {
+ 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);
+ INIT_WORK (&dev->work, eth_work, dev);
+ INIT_LIST_HEAD (&dev->tx_reqs);
+ INIT_LIST_HEAD (&dev->rx_reqs);
+
+ /* network device setup */
+ dev->net = net;
+ SET_MODULE_OWNER (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.
+ */
+ get_ether_addr(dev_addr, net->dev_addr);
+ if (cdc || rndis) {
+ get_ether_addr(host_addr, dev->host_mac);
+#ifdef DEV_CONFIG_CDC
+ 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]);
+#endif
+ }
+
+ 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);
+ if (!dev->req)
+ goto fail;
+ dev->req->complete = eth_setup_complete;
+
+ /* ... and maybe likewise for status transfer */
+ if (dev->status_ep) {
+ dev->stat_req = eth_req_alloc (dev->status_ep,
+ STATUS_BYTECOUNT);
+ if (!dev->stat_req) {
+ eth_req_free (gadget->ep0, dev->req);
+ goto fail;
+ }
+ }
+
+ /* 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,
+ EP_OUT_NAME, EP_IN_NAME,
+ EP_STATUS_NAME ? " STATUS " : "",
+ EP_STATUS_NAME ? EP_STATUS_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]);
+
+#ifdef CONFIG_USB_ETH_RNDIS
+ if (rndis) {
+ u32 vendorID = 0;
+
+ /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
+
+ dev->rndis_config = rndis_register (rndis_control_ack);
+ if (dev->rndis_config < 0) {
+fail0:
+ unregister_netdev (dev->net);
+ status = -ENODEV;
+ goto fail;
+ }
+
+ /* 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->stats))
+ 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");
+ }
+#endif
+
+ 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 = {
+#ifdef CONFIG_USB_GADGET_DUALSPEED
+ .speed = USB_SPEED_HIGH,
+#else
+ .speed = USB_SPEED_FULL,
+#endif
+ .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,
+ // .shutdown = ...
+ // .suspend = ...
+ // .resume = ...
+ },
+};
+
+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);
+}
+module_init (init);
+
+static void __exit cleanup (void)
+{
+ usb_gadget_unregister_driver (ð_driver);
+}
+module_exit (cleanup);
+