diff options
Diffstat (limited to 'drivers/usb/gadget/ether.c')
| -rw-r--r-- | drivers/usb/gadget/ether.c | 1976 |
1 files changed, 1976 insertions, 0 deletions
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c new file mode 100644 index 000000000..bc6480c78 --- /dev/null +++ b/drivers/usb/gadget/ether.c @@ -0,0 +1,1976 @@ +/* + * ether.c -- Ethernet gadget driver, with CDC and non-CDC options + * + * 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 + * 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 + */ + +#include <common.h> +#include <asm/errno.h> +#include <linux/usb/ch9.h> +#include <linux/usb/cdc.h> +#include <linux/usb/gadget.h> +#include <net.h> +#include <linux/ctype.h> + +#include "gadget_chips.h" + +#define USB_NET_NAME "usb0" + +#define atomic_read +extern struct platform_data brd; +#define spin_lock(x) +#define spin_unlock(x) + + +unsigned packet_received, packet_sent; + +#define DEV_CONFIG_CDC 1 +#define GFP_ATOMIC ((gfp_t) 0) +#define GFP_KERNEL ((gfp_t) 0) + +/* + * 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. + * + * 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 + * operations are available. Linux supports it, but other host operating + * systems may not. (This is a subset of CDC Ethernet.) + * + * It turns out that if you add a few descriptors to that "CDC Subset", + * (Windows) host side drivers from MCCI can treat it as one submode of + * a proprietary scheme called "SAFE" ... without needing to know about + * specific product/vendor IDs. So we do that, making it easier to use + * those MS-Windows drivers. Those added descriptors make it resemble a + * CDC MDLM device, but they don't change device behavior at all. (See + * MCCI Engineering report 950198 "SAFE Networking Functions".) + * + * 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. They borrow more from CDC ACM than CDC ECM. + */ +#define ETH_ALEN 6 /* Octets in one ethernet addr */ +#define ETH_HLEN 14 /* Total octets in header. */ +#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */ +#define ETH_DATA_LEN 1500 /* Max. octets in payload */ +#define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */ +#define ETH_FCS_LEN 4 /* Octets in the FCS */ + +#define DRIVER_DESC "Ethernet Gadget" +/* Based on linux 2.6.27 version */ +#define DRIVER_VERSION "May Day 2005" + +static const char shortname[] = "ether"; +static const char driver_desc[] = DRIVER_DESC; + +#define RX_EXTRA 20 /* guard against rx overflows */ + +/* CDC 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) + +#define USB_CONNECT_TIMEOUT (3 * CONFIG_SYS_HZ) + +/*-------------------------------------------------------------------------*/ +static struct eth_dev l_ethdev; +static struct eth_device l_netdev; +static struct usb_gadget_driver eth_driver; + +/*-------------------------------------------------------------------------*/ + +/* "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 +} + +#define subset_active(dev) (!is_cdc(dev)) +#define cdc_active(dev) (is_cdc(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 + +#ifdef CONFIG_USB_ETH_QMULT +#define qmult CONFIG_USB_ETH_QMULT +#else +#define qmult 5 +#endif + +/* 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 + +struct eth_dev { + struct usb_gadget *gadget; + struct usb_request *req; /* for control responses */ + struct usb_request *stat_req; /* for cdc status */ + + u8 config; + struct usb_ep *in_ep, *out_ep, *status_ep; + const struct usb_endpoint_descriptor + *in, *out, *status; + + struct usb_request *tx_req, *rx_req; + + struct eth_device *net; + unsigned int tx_qlen; + + unsigned zlp:1; + unsigned cdc:1; + unsigned suspended:1; + unsigned network_started:1; + u16 cdc_filter; + unsigned long todo; + int mtu; +#define WORK_RX_MEMORY 0 + 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. + */ + +/*-------------------------------------------------------------------------*/ + +/* + * 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 + +/* + * 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 bcdDevice; +#if defined(CONFIG_USBNET_MANUFACTURER) +static char *iManufacturer = CONFIG_USBNET_MANUFACTURER; +#else +static char *iManufacturer = "U-boot"; +#endif +static char *iProduct; +static char *iSerialNumber; +static char dev_addr[18]; +static char host_addr[18]; + +/*-------------------------------------------------------------------------*/ + +/* + * 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. + */ + +#define STRING_MANUFACTURER 1 +#define STRING_PRODUCT 2 +#define STRING_ETHADDR 3 +#define STRING_DATA 4 +#define STRING_CONTROL 5 +#define STRING_CDC 7 +#define STRING_SUBSET 8 +#define STRING_SERIALNUMBER 10 + +/* holds our biggest descriptor */ +#define USB_BUFSIZ 256 + +/* + * This device advertises one configuration, eth_config, + * on hardware supporting at least two configs. + * + * FIXME define some higher-powered configurations to make it easier + * to recharge batteries ... + */ + +#define DEV_CONFIG_VALUE 1 /* cdc or subset */ + +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 = 1, +}; + +/* + * 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. + */ + +#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 + +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), +}; + +#if defined(DEV_CONFIG_CDC) + +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 */ + +#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, + + .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. + */ +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) */ +}; + +#endif + +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, +}; + +#if defined(DEV_CONFIG_CDC) + +/* + * 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). + */ + +#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 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. + * + * 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. + */ + +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_COMM, + .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM, + .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 fs_subset_descriptors(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 +} + +/* + * 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) +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 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 +} + +/* 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 + { } /* end of list */ +}; + +static struct usb_gadget_strings stringtab = { + .language = 0x0409, /* en-us */ + .strings = strings, +}; + +/*============================================================================*/ +static u8 control_req[USB_BUFSIZ]; +static u8 status_req[STATUS_BYTECOUNT] __attribute__ ((aligned(4))); + + +/** + * strlcpy - Copy a %NUL terminated string into a sized buffer + * @dest: Where to copy the string to + * @src: Where to copy the string from + * @size: size of destination buffer + * + * Compatible with *BSD: the result is always a valid + * NUL-terminated string that fits in the buffer (unless, + * of course, the buffer size is zero). It does not pad + * out the result like strncpy() does. + */ +size_t strlcpy(char *dest, const char *src, size_t size) +{ + size_t ret = strlen(src); + + if (size) { + size_t len = (ret >= size) ? size - 1 : ret; + memcpy(dest, src, len); + dest[len] = '\0'; + } + return ret; +} + +/*============================================================================*/ + +/* + * 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; + + 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 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) + /* status endpoint used for (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("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. + */ + if (!cdc_active(dev)) { + result = usb_ep_enable(dev->in_ep, dev->in); + if (result != 0) { + debug("enable %s --> %d\n", + dev->in_ep->name, result); + goto done; + } + + result = usb_ep_enable(dev->out_ep, dev->out); + if (result != 0) { + debug("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; + } + + /* caller is responsible for cleanup on error */ + return result; +} + +static void eth_reset_config(struct eth_dev *dev) +{ + if (dev->config == 0) + return; + + debug("%s\n", __func__); + + /* + * disable endpoints, forcing (synchronous) completion of + * pending i/o. then free the requests. + */ + + if (dev->in) { + usb_ep_disable(dev->in_ep); + if (dev->tx_req) { + usb_ep_free_request(dev->in_ep, dev->tx_req); + dev->tx_req = NULL; + } + } + if (dev->out) { + usb_ep_disable(dev->out_ep); + if (dev->rx_req) { + usb_ep_free_request(dev->out_ep, dev->rx_req); + dev->rx_req = NULL; + } + } + if (dev->status) + usb_ep_disable(dev->status_ep); + + 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 + && dev->tx_qlen != 0) { + /* tx fifo is full, but we can't clear it...*/ + error("can't change configurations"); + return -ESPIPE; + } + eth_reset_config(dev); + + switch (number) { + case DEV_CONFIG_VALUE: + result = set_ether_config(dev, gfp_flags); + break; + 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; + printf("%s speed config #%d: %d mA, %s, using %s\n", + speed, number, power, driver_desc, + (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. 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("send SPEED_CHANGE --> %d\n", value); + if (value == 0) + return; + } else if (value != -ECONNRESET) { + debug("event %02x --> %d\n", + event->bNotificationType, value); + if (event->bNotificationType == + USB_CDC_NOTIFY_SPEED_CHANGE) { + l_ethdev.network_started = 1; + printf("USB network up!\n"); + } + } + 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; + + /* + * 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("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("setup complete --> %d, %d/%d\n", + req->status, req->actual, req->length); +} + +/* + * 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. + */ + + debug("%s\n", __func__); + + 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("HNP available\n"); + else if (gadget->a_alt_hnp_support) + debug("HNP needs a different root port\n"); + value = eth_set_config(dev, wValue, GFP_ATOMIC); + 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; + + /* + * 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; + if (dev->status) + issue_start_status(dev); + } + + value = 0; + break; + } +#else + /* + * FIXME this is wrong, as is the assumption that + * all non-PXA hardware talks real CDC ... + */ + debug("set_interface ignored!\n"); +#endif /* DEV_CONFIG_CDC */ + +done_set_intf: + break; + case USB_REQ_GET_INTERFACE: + if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) + || !dev->config + || wIndex > 1) + break; + if (!(cdc_active(dev)) && wIndex != 0) + break; + + /* for CDC, iff carrier is on, data interface is active. */ + if (wIndex != 1) + *(u8 *)req->buf = 0; + else { + /* *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; */ + /* carrier always ok ...*/ + *(u8 *)req->buf = 1 ; + } + 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("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 */ + + default: + debug("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) { + debug("respond with data transfer before status phase\n"); + 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("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 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) +{ + 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). + */ + + debug("%s\n", __func__); + + size = (ETHER_HDR_SIZE + dev->mtu + RX_EXTRA); + size += dev->out_ep->maxpacket - 1; + size -= size % dev->out_ep->maxpacket; + + /* + * Some platforms perform better when IP packets are aligned, + * but on at least one, checksumming fails otherwise. + */ + + req->buf = (u8 *) NetRxPackets[0]; + req->length = size; + req->complete = rx_complete; + + retval = usb_ep_queue(dev->out_ep, req, gfp_flags); + + if (retval) + error("rx submit --> %d", retval); + + return retval; +} + +static void rx_complete(struct usb_ep *ep, struct usb_request *req) +{ + struct eth_dev *dev = ep->driver_data; + + debug("%s: status %d\n", __func__, req->status); + + packet_received = 1; + + if (req) + dev->rx_req = req; +} + +static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags) +{ + + dev->tx_req = usb_ep_alloc_request(dev->in_ep, 0); + + if (!dev->tx_req) + goto fail; + + dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0); + + if (!dev->rx_req) + goto fail; + + return 0; + +fail: + error("can't alloc requests"); + return -1; +} + +static void tx_complete(struct usb_ep *ep, struct usb_request *req) +{ + debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok"); + packet_sent = 1; +} + +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; +} + +#if 0 +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; +} + +/*-------------------------------------------------------------------------*/ +#endif + +static void eth_unbind(struct usb_gadget *gadget) +{ + struct eth_dev *dev = get_gadget_data(gadget); + + debug("%s...\n", __func__); + + /* we've already been disconnected ... no i/o is active */ + if (dev->req) { + usb_ep_free_request(gadget->ep0, dev->req); + dev->req = NULL; + } + if (dev->stat_req) { + usb_ep_free_request(dev->status_ep, dev->stat_req); + dev->stat_req = NULL; + } + + if (dev->tx_req) { + usb_ep_free_request(dev->in_ep, dev->tx_req); + dev->tx_req = NULL; + } + + if (dev->rx_req) { + usb_ep_free_request(dev->out_ep, dev->rx_req); + dev->rx_req = NULL; + } + +/* unregister_netdev (dev->net);*/ +/* free_netdev(dev->net);*/ + + set_gadget_data(gadget, NULL); +} + +static void eth_disconnect(struct usb_gadget *gadget) +{ + eth_reset_config(get_gadget_data(gadget)); +} + +static void eth_suspend(struct usb_gadget *gadget) +{ + /* Not used */ +} + +static void eth_resume(struct usb_gadget *gadget) +{ + /* Not used */ +} + +/*-------------------------------------------------------------------------*/ + +static int is_eth_addr_valid(char *str) +{ + if (strlen(str) == 17) { + int i; + char *p, *q; + uchar ea[6]; + + /* see if it looks like an ethernet address */ + + p = str; + + for (i = 0; i < 6; i++) { + char term = (i == 5 ? '\0' : ':'); + + ea[i] = simple_strtol(p, &q, 16); + + if ((q - p) != 2 || *q++ != term) + break; + + p = q; + } + + if (i == 6) /* it looks ok */ + return 1; + } + return 0; +} + +static u8 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 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; + } + return 1; +} + +static int eth_bind(struct usb_gadget *gadget) +{ + struct eth_dev *dev = &l_ethdev; + u8 cdc = 1, zlp = 1; + struct usb_ep *in_ep, *out_ep, *status_ep = NULL; + int gcnum; + u8 tmp[7]; + + /* these flags are only ever cleared; compiler take note */ +#ifndef DEV_CONFIG_CDC + cdc = 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; + } 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(0x0300 + 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. + */ + error("controller '%s' not recognized", + gadget->name); + return -ENODEV; + } + + /* + * 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.) + */ + 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 defined(CONFIG_USB_CDC_VENDOR_ID) && defined(CONFIG_USB_CDC_PRODUCT_ID) + device_desc.idVendor = cpu_to_le16(CONFIG_USB_CDC_VENDOR_ID); + device_desc.idProduct = cpu_to_le16(CONFIG_USB_CDC_PRODUCT_ID); +#endif + 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: + error("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) + /* + * CDC Ethernet control interface doesn't require a status endpoint. + * Since some hosts expect one, try to allocate one anyway. + */ + if (cdc) { + status_ep = usb_ep_autoconfig(gadget, &fs_status_desc); + if (status_ep) { + status_ep->driver_data = status_ep; /* claim */ + } else if (cdc) { + control_intf.bNumEndpoints = 0; + /* FIXME remove endpoint from descriptor list */ + } + } +#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); + + if (gadget_is_dualspeed(gadget)) { + 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) + 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; + } + + dev->net = &l_netdev; + strcpy(dev->net->name, USB_NET_NAME); + + 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 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. + */ + get_ether_addr(dev_addr, dev->net->enetaddr); + + memset(tmp, 0, sizeof(tmp)); + memcpy(tmp, dev->net->enetaddr, sizeof(dev->net->enetaddr)); + + get_ether_addr(host_addr, dev->host_mac); + + sprintf(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]); + + printf("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 : "" + ); + printf("MAC %02x:%02x:%02x:%02x:%02x:%02x\n", + dev->net->enetaddr[0], dev->net->enetaddr[1], + dev->net->enetaddr[2], dev->net->enetaddr[3], + dev->net->enetaddr[4], dev->net->enetaddr[5]); + + if (cdc) { + printf("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]); + } + + /* + * use PKTSIZE (or aligned... from u-boot) and set + * wMaxSegmentSize accordingly + */ + dev->mtu = PKTSIZE_ALIGN; /* RNDIS does not like this, only 1514, TODO*/ + + /* preallocate control message data and buffer */ + dev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); + if (!dev->req) + goto fail; + dev->req->buf = control_req; + dev->req->complete = eth_setup_complete; + + /* ... and maybe likewise for status transfer */ +#if defined(DEV_CONFIG_CDC) + if (dev->status_ep) { + dev->stat_req = usb_ep_alloc_request(dev->status_ep, + GFP_KERNEL); + if (!dev->stat_req) { + usb_ep_free_request(dev->status_ep, dev->req); + + goto fail; + } + dev->stat_req->buf = status_req; + 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" + */ + return 0; + +fail: + error("%s failed", __func__); + eth_unbind(gadget); + return -ENOMEM; +} + +static int usb_eth_init(struct eth_device *netdev, bd_t *bd) +{ + struct eth_dev *dev = &l_ethdev; + struct usb_gadget *gadget; + unsigned long ts; + unsigned long timeout = USB_CONNECT_TIMEOUT; + + if (!netdev) { + error("received NULL ptr"); + goto fail; + } + + dev->network_started = 0; + dev->tx_req = NULL; + dev->rx_req = NULL; + + packet_received = 0; + packet_sent = 0; + + gadget = dev->gadget; + usb_gadget_connect(gadget); + + if (getenv("cdc_connect_timeout")) + timeout = simple_strtoul(getenv("cdc_connect_timeout"), + NULL, 10) * CONFIG_SYS_HZ; + ts = get_timer(0); + while (!l_ethdev.network_started) { + /* Handle control-c and timeouts */ + if (ctrlc() || (get_timer(ts) > timeout)) { + error("The remote end did not respond in time."); + goto fail; + } + usb_gadget_handle_interrupts(); + } + + rx_submit(dev, dev->rx_req, 0); + return 0; +fail: + return -1; +} + +static int usb_eth_send(struct eth_device *netdev, + volatile void *packet, int length) +{ + int retval; + struct usb_request *req = NULL; + struct eth_dev *dev = &l_ethdev; + unsigned long ts; + unsigned long timeout = USB_CONNECT_TIMEOUT; + + debug("%s:...\n", __func__); + + req = dev->tx_req; + + req->buf = (void *)packet; + req->context = NULL; + 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; +#if 0 + /* throttle highspeed IRQ rate back slightly */ + if (gadget_is_dualspeed(dev->gadget)) + req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) + ? ((dev->tx_qlen % qmult) != 0) : 0; +#endif + dev->tx_qlen = 1; + ts = get_timer(0); + packet_sent = 0; + + retval = usb_ep_queue(dev->in_ep, req, GFP_ATOMIC); + + if (!retval) + debug("%s: packet queued\n", __func__); + while (!packet_sent) { + if (get_timer(ts) > timeout) { + printf("timeout sending packets to usb ethernet\n"); + return -1; + } + usb_gadget_handle_interrupts(); + } + + return 0; +} + +static int usb_eth_recv(struct eth_device *netdev) +{ + struct eth_dev *dev = &l_ethdev; + + usb_gadget_handle_interrupts(); + + if (packet_received) { + debug("%s: packet received\n", __func__); + if (dev->rx_req) { + NetReceive(NetRxPackets[0], dev->rx_req->length); + packet_received = 0; + + if (dev->rx_req) + rx_submit(dev, dev->rx_req, 0); + } else + error("dev->rx_req invalid"); + } + return 0; +} + +void usb_eth_halt(struct eth_device *netdev) +{ + struct eth_dev *dev = &l_ethdev; + + if (!netdev) { + error("received NULL ptr"); + return; + } + + usb_gadget_disconnect(dev->gadget); +} + +static struct usb_gadget_driver eth_driver = { + .speed = DEVSPEED, + + .bind = eth_bind, + .unbind = eth_unbind, + + .setup = eth_setup, + .disconnect = eth_disconnect, + + .suspend = eth_suspend, + .resume = eth_resume, +}; + +int usb_eth_initialize(bd_t *bi) +{ + int status = 0; + struct eth_device *netdev = &l_netdev; + + sprintf(netdev->name, "usb_ether"); + + netdev->init = usb_eth_init; + netdev->send = usb_eth_send; + netdev->recv = usb_eth_recv; + netdev->halt = usb_eth_halt; + +#ifdef CONFIG_MCAST_TFTP + #error not supported +#endif + /* Configure default mac-addresses for the USB ethernet device */ +#ifdef CONFIG_USBNET_DEV_ADDR + strncpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr)); +#endif +#ifdef CONFIG_USBNET_HOST_ADDR + strncpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr)); +#endif + /* Check if the user overruled the MAC addresses */ + if (getenv("usbnet_devaddr")) + strncpy(dev_addr, getenv("usbnet_devaddr"), + sizeof(dev_addr)); + + if (getenv("usbnet_hostaddr")) + strncpy(host_addr, getenv("usbnet_hostaddr"), + sizeof(host_addr)); + + /* Make sure both strings are terminated */ + dev_addr[sizeof(dev_addr)-1] = '\0'; + host_addr[sizeof(host_addr)-1] = '\0'; + + if (!is_eth_addr_valid(dev_addr)) { + error("Need valid 'usbnet_devaddr' to be set"); + status = -1; + } + if (!is_eth_addr_valid(host_addr)) { + error("Need valid 'usbnet_hostaddr' to be set"); + status = -1; + } + if (status) + goto fail; + + status = usb_gadget_register_driver(ð_driver); + if (status < 0) + goto fail; + + eth_register(netdev); + return 0; + +fail: + error("%s failed. error = %d", __func__, status); + return status; +} + |