/* * 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 * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include "gadget_chips.h" #include "rndis.h" #define USB_NET_NAME "usb_ether" #define atomic_read extern struct platform_data brd; unsigned packet_received, packet_sent; /* * 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 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 */ #ifndef CONFIG_USB_ETH_RNDIS #define rndis_uninit(x) do {} while (0) #define rndis_deregister(c) do {} while (0) #define rndis_exit() do {} while (0) #endif /* CDC and RNDIS support the same host-chosen outgoing packet filters. */ #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ |USB_CDC_PACKET_TYPE_PROMISCUOUS \ |USB_CDC_PACKET_TYPE_DIRECTED) #define USB_CONNECT_TIMEOUT (3 * CONFIG_SYS_HZ) /*-------------------------------------------------------------------------*/ struct eth_dev { 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 usb_request *tx_req, *rx_req; struct eth_device *net; struct net_device_stats stats; unsigned int tx_qlen; unsigned zlp:1; unsigned cdc:1; unsigned rndis:1; unsigned suspended:1; unsigned network_started:1; u16 cdc_filter; unsigned long todo; int mtu; #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 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(CONFIG_USB_ETH_SUBSET) return 1; /* only cdc possible */ #elif !defined(CONFIG_USB_ETH_CDC) return 0; /* only subset possible */ #else return dev->cdc; /* depends on what hardware we found */ #endif } /* "secondary" RNDIS config may sometimes be activated */ static inline int rndis_active(struct eth_dev *dev) { #ifdef CONFIG_USB_ETH_RNDIS return dev->rndis; #else return 0; #endif } #define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev)) #define cdc_active(dev) (is_cdc(dev) && !rndis_active(dev)) #define DEFAULT_QLEN 2 /* double buffering by default */ /* peak bulk transfer bits-per-second */ #define HS_BPS (13 * 512 * 8 * 1000 * 8) #define FS_BPS (19 * 64 * 1 * 1000 * 8) #ifdef CONFIG_USB_GADGET_DUALSPEED #define DEVSPEED USB_SPEED_HIGH #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 /*-------------------------------------------------------------------------*/ /* * 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 /* Compaq Computer Corp. */ #define SIMPLE_PRODUCT_NUM 0x505a /* Linux-USB "CDC Subset" Device */ /* * 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). */ /* * Emulating them in eth_bind: * static ushort idVendor; * static ushort idProduct; */ #if defined(CONFIG_USBNET_MANUFACTURER) static char *iManufacturer = CONFIG_USBNET_MANUFACTURER; #else static char *iManufacturer = "U-boot"; #endif /* These probably need to be configurable. */ static ushort bcdDevice; 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, with RNDIS as an optional second configuration. * * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But * the class descriptors match a modem (they're ignored; it's really just * Ethernet functionality), they don't need the NOP altsetting, and the * status transfer endpoint isn't optional. */ #define STRING_MANUFACTURER 1 #define STRING_PRODUCT 2 #define STRING_ETHADDR 3 #define STRING_DATA 4 #define STRING_CONTROL 5 #define STRING_RNDIS_CONTROL 6 #define STRING_CDC 7 #define STRING_SUBSET 8 #define STRING_RNDIS 9 #define STRING_SERIALNUMBER 10 /* holds our biggest descriptor (or RNDIS response) */ #define USB_BUFSIZ 256 /* * This device advertises one configuration, eth_config, unless RNDIS * is enabled (rndis_config) on hardware supporting at least two configs. * * NOTE: Controllers like superh_udc should probably be able to use * an RNDIS-only configuration. * * FIXME define some higher-powered configurations to make it easier * to recharge batteries ... */ #define DEV_CONFIG_VALUE 1 /* cdc or subset */ #define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */ static struct usb_device_descriptor device_desc = { .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, }; #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 = 1, }; #endif /* * Compared to the simple CDC subset, the full CDC Ethernet model adds * three class descriptors, two interface descriptors, optional status * endpoint. Both have a "data" interface and two bulk endpoints. * There are also differences in how control requests are handled. * * RNDIS shares a lot with CDC-Ethernet, since it's a variant of the * CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it * may hang or oops. Since bugfixes (or accurate specs, letting Linux * work around those bugs) are unlikely to ever come from MSFT, you may * wish to avoid using RNDIS. * * MCCI offers an alternative to RNDIS if you need to connect to Windows * but have hardware that can't support CDC Ethernet. We add descriptors * to present the CDC Subset as a (nonconformant) CDC MDLM variant called * "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can * get those drivers from MCCI, or bundled with various products. */ #ifdef CONFIG_USB_ETH_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 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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) 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 const struct usb_cdc_acm_descriptor acm_descriptor = { .bLength = sizeof acm_descriptor, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = USB_CDC_ACM_TYPE, .bmCapabilities = 0x00, }; #endif #ifndef CONFIG_USB_ETH_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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) /* * include the status endpoint if we can, even where it's optional. * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one * packet, to simplify cancellation; and a big transfer interval, to * waste less bandwidth. * * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even * if they ignore the connect/disconnect notifications that real aether * can provide. more advanced cdc configurations might want to support * encapsulated commands (vendor-specific, using control-OUT). * * RNDIS requires the status endpoint, since it uses that encapsulation * mechanism for its funky RPC scheme. */ #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 CONFIG_USB_ETH_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 CONFIG_USB_ETH_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, .wMaxPacketSize = __constant_cpu_to_le16(64), }; 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, .wMaxPacketSize = __constant_cpu_to_le16(64), }; static const struct usb_descriptor_header *fs_eth_function[11] = { (struct usb_descriptor_header *) &otg_descriptor, #ifdef CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_CDC */ }; static inline void fs_subset_descriptors(void) { #ifdef CONFIG_USB_ETH_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 } #ifdef CONFIG_USB_ETH_RNDIS static const struct usb_descriptor_header *fs_rndis_function[] = { (struct usb_descriptor_header *) &otg_descriptor, /* control interface matches ACM, not Ethernet */ (struct usb_descriptor_header *) &rndis_control_intf, (struct usb_descriptor_header *) &header_desc, (struct usb_descriptor_header *) &call_mgmt_descriptor, (struct usb_descriptor_header *) &acm_descriptor, (struct usb_descriptor_header *) &union_desc, (struct usb_descriptor_header *) &fs_status_desc, /* data interface has no altsetting */ (struct usb_descriptor_header *) &rndis_data_intf, (struct usb_descriptor_header *) &fs_source_desc, (struct usb_descriptor_header *) &fs_sink_desc, NULL, }; #endif /* * usb 2.0 devices need to expose both high speed and full speed * descriptors, unless they only run at full speed. */ #if defined(CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_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 CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_CDC */ }; static inline void hs_subset_descriptors(void) { #ifdef CONFIG_USB_ETH_SUBSET /* behavior is "CDC Subset"; extra descriptors say "SAFE" */ hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc; hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc; hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc; hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc; hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc; hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc; hs_eth_function[8] = NULL; #else hs_eth_function[1] = NULL; #endif } #ifdef CONFIG_USB_ETH_RNDIS static const struct usb_descriptor_header *hs_rndis_function[] = { (struct usb_descriptor_header *) &otg_descriptor, /* control interface matches ACM, not Ethernet */ (struct usb_descriptor_header *) &rndis_control_intf, (struct usb_descriptor_header *) &header_desc, (struct usb_descriptor_header *) &call_mgmt_descriptor, (struct usb_descriptor_header *) &acm_descriptor, (struct usb_descriptor_header *) &union_desc, (struct usb_descriptor_header *) &hs_status_desc, /* data interface has no altsetting */ (struct usb_descriptor_header *) &rndis_data_intf, (struct usb_descriptor_header *) &hs_source_desc, (struct usb_descriptor_header *) &hs_sink_desc, NULL, }; #endif /* maxpacket and other transfer characteristics vary by speed. */ static inline struct usb_endpoint_descriptor * ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, struct usb_endpoint_descriptor *fs) { if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) return hs; return fs; } /*-------------------------------------------------------------------------*/ /* descriptors that are built on-demand */ static char manufacturer[50]; static char product_desc[40] = DRIVER_DESC; static char serial_number[20]; /* address that the host will use ... usually assigned at random */ static char ethaddr[2 * ETH_ALEN + 1]; /* static strings, in UTF-8 */ static struct usb_string strings[] = { { STRING_MANUFACTURER, manufacturer, }, { STRING_PRODUCT, product_desc, }, { STRING_SERIALNUMBER, serial_number, }, { STRING_DATA, "Ethernet Data", }, { STRING_ETHADDR, ethaddr, }, #ifdef CONFIG_USB_ETH_CDC { STRING_CDC, "CDC Ethernet", }, { STRING_CONTROL, "CDC Communications Control", }, #endif #ifdef CONFIG_USB_ETH_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, }; /*============================================================================*/ DEFINE_CACHE_ALIGN_BUFFER(u8, control_req, USB_BUFSIZ); #if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) DEFINE_CACHE_ALIGN_BUFFER(u8, status_req, STATUS_BYTECOUNT); #endif /*============================================================================*/ /* * one config, two interfaces: control, data. * complications: class descriptors, and an altsetting. */ static int config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg) { int len; const struct usb_config_descriptor *config; const struct usb_descriptor_header **function; int hs = 0; if (gadget_is_dualspeed(g)) { hs = (g->speed == USB_SPEED_HIGH); if (type == USB_DT_OTHER_SPEED_CONFIG) hs = !hs; } #define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function) if (index >= device_desc.bNumConfigurations) return -EINVAL; #ifdef CONFIG_USB_ETH_RNDIS /* * list the RNDIS config first, to make Microsoft's drivers * happy. DOCSIS 1.0 needs this too. */ if (device_desc.bNumConfigurations == 2 && index == 0) { config = &rndis_config; function = which_fn(rndis); } else #endif { config = ð_config; function = which_fn(eth); } /* for now, don't advertise srp-only devices */ if (!is_otg) function++; len = usb_gadget_config_buf(config, buf, USB_BUFSIZ, function); if (len < 0) return len; ((struct usb_config_descriptor *) buf)->bDescriptorType = type; return len; } /*-------------------------------------------------------------------------*/ static void eth_start(struct eth_dev *dev, gfp_t gfp_flags); static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags); static int set_ether_config(struct eth_dev *dev, gfp_t gfp_flags) { int result = 0; struct usb_gadget *gadget = dev->gadget; #if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) /* status endpoint used for RNDIS and (optionally) CDC */ if (!subset_active(dev) && dev->status_ep) { dev->status = ep_desc(gadget, &hs_status_desc, &fs_status_desc); dev->status_ep->driver_data = dev; result = usb_ep_enable(dev->status_ep, dev->status); if (result != 0) { debug("enable %s --> %d\n", dev->status_ep->name, result); goto done; } } #endif dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc); dev->in_ep->driver_data = dev; dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc); dev->out_ep->driver_data = dev; /* * With CDC, the host isn't allowed to use these two data * endpoints in the default altsetting for the interface. * so we don't activate them yet. Reset from SET_INTERFACE. * * Strictly speaking RNDIS should work the same: activation is * a side effect of setting a packet filter. Deactivation is * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG. */ if (!cdc_active(dev)) { result = usb_ep_enable(dev->in_ep, dev->in); if (result != 0) { debug("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; } else if (!cdc_active(dev)) { /* * activate non-CDC configs right away * this isn't strictly according to the RNDIS spec */ eth_start(dev, GFP_ATOMIC); } /* 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__); rndis_uninit(dev->rndis_config); /* * disable endpoints, forcing (synchronous) completion of * pending i/o. then free the requests. */ if (dev->in) { usb_ep_disable(dev->in_ep); 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->rndis = 0; dev->cdc_filter = 0; dev->config = 0; } /* * change our operational config. must agree with the code * that returns config descriptors, and altsetting code. */ static int eth_set_config(struct eth_dev *dev, unsigned number, gfp_t gfp_flags) { int result = 0; struct usb_gadget *gadget = dev->gadget; if (gadget_is_sa1100(gadget) && dev->config && 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; #ifdef CONFIG_USB_ETH_RNDIS case DEV_RNDIS_CONFIG_VALUE: dev->rndis = 1; result = set_ether_config(dev, gfp_flags); break; #endif default: result = -EINVAL; /* FALL THROUGH */ case 0: break; } if (result) { if (number) eth_reset_config(dev); usb_gadget_vbus_draw(dev->gadget, gadget_is_otg(dev->gadget) ? 8 : 100); } else { char *speed; unsigned power; power = 2 * eth_config.bMaxPower; usb_gadget_vbus_draw(dev->gadget, power); switch (gadget->speed) { case USB_SPEED_FULL: speed = "full"; break; #ifdef CONFIG_USB_GADGET_DUALSPEED case USB_SPEED_HIGH: speed = "high"; break; #endif default: speed = "?"; break; } dev->config = number; printf("%s speed config #%d: %d mA, %s, using %s\n", speed, number, power, driver_desc, rndis_active(dev) ? "RNDIS" : (cdc_active(dev) ? "CDC Ethernet" : "CDC Ethernet Subset")); } return result; } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_USB_ETH_CDC /* * The interrupt endpoint is used in CDC networking models (Ethernet, ATM) * only to notify the host about link status changes (which we support) or * report completion of some encapsulated command (as used in RNDIS). Since * we want this CDC Ethernet code to be vendor-neutral, we don't use that * command mechanism; and only one status request is ever queued. */ static void eth_status_complete(struct usb_ep *ep, struct usb_request *req) { struct usb_cdc_notification *event = req->buf; int value = req->status; struct eth_dev *dev = ep->driver_data; /* issue the second notification if host reads the first */ if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION && value == 0) { __le32 *data = req->buf + sizeof *event; event->bmRequestType = 0xA1; event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; event->wValue = __constant_cpu_to_le16(0); event->wIndex = __constant_cpu_to_le16(1); event->wLength = __constant_cpu_to_le16(8); /* SPEED_CHANGE data is up/down speeds in bits/sec */ data[0] = data[1] = cpu_to_le32(BITRATE(dev->gadget)); req->length = STATUS_BYTECOUNT; value = usb_ep_queue(ep, req, GFP_ATOMIC); debug("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); } #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("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 */ status = rndis_msg_parser(dev->rndis_config, (u8 *) req->buf); if (status < 0) error("%s: rndis parse error %d", __func__, status); } #endif /* RNDIS */ /* * The setup() callback implements all the ep0 functionality that's not * handled lower down. CDC has a number of less-common features: * * - two interfaces: control, and ethernet data * - Ethernet data interface has two altsettings: default, and active * - class-specific descriptors for the control interface * - class-specific control requests */ static int eth_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) { struct eth_dev *dev = get_gadget_data(gadget); struct usb_request *req = dev->req; int value = -EOPNOTSUPP; u16 wIndex = le16_to_cpu(ctrl->wIndex); u16 wValue = le16_to_cpu(ctrl->wValue); u16 wLength = le16_to_cpu(ctrl->wLength); /* * descriptors just go into the pre-allocated ep0 buffer, * while config change events may enable network traffic. */ 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: device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; 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); /* * PXA25x driver use non-CDC ethernet gadget. * But only _CDC and _RNDIS code can signalize * that network is working. So we signalize it * here. */ l_ethdev.network_started = 1; debug("USB network up!\n"); goto done_set_intf; } #ifdef CONFIG_USB_ETH_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); eth_start(dev, GFP_ATOMIC); } 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 /* CONFIG_USB_ETH_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) || rndis_active(dev)) && wIndex != 0) break; /* for CDC, iff carrier is on, data interface is active. */ if (rndis_active(dev) || wIndex != 1) *(u8 *)req->buf = 0; else { /* *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; */ /* carrier always ok ...*/ *(u8 *)req->buf = 1 ; } value = min(wLength, (u16) 1); break; #ifdef CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_CDC */ #ifdef CONFIG_USB_ETH_RNDIS /* * RNDIS uses the CDC command encapsulation mechanism to implement * an RPC scheme, with much getting/setting of attributes by OID. */ case USB_CDC_SEND_ENCAPSULATED_COMMAND: if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) || !rndis_active(dev) || wLength > USB_BUFSIZ || wValue || rndis_control_intf.bInterfaceNumber != wIndex) break; /* read the request, then process it */ value = wLength; req->complete = rndis_command_complete; /* later, rndis_control_ack () sends a notification */ break; case USB_CDC_GET_ENCAPSULATED_RESPONSE: if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE) == ctrl->bRequestType && rndis_active(dev) /* && wLength >= 0x0400 */ && !wValue && rndis_control_intf.bInterfaceNumber == wIndex) { u8 *buf; u32 n; /* return the result */ buf = rndis_get_next_response(dev->rndis_config, &n); if (buf) { memcpy(req->buf, buf, n); req->complete = rndis_response_complete; rndis_free_response(dev->rndis_config, buf); value = n; } /* else stalls ... spec says to avoid that */ } break; #endif /* RNDIS */ default: 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). * * 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. */ debug("%s\n", __func__); if (!req) return -EINVAL; size = (ETHER_HDR_SIZE + dev->mtu + RX_EXTRA); size += dev->out_ep->maxpacket - 1; if (rndis_active(dev)) size += sizeof(struct rndis_packet_msg_type); size -= size % dev->out_ep->maxpacket; /* * Some platforms perform better when IP packets are aligned, * but on at least one, checksumming fails otherwise. Note: * RNDIS headers involve variable numbers of LE32 values. */ req->buf = (u8 *)net_rx_packets[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); switch (req->status) { /* normal completion */ case 0: if (rndis_active(dev)) { /* we know MaxPacketsPerTransfer == 1 here */ int length = rndis_rm_hdr(req->buf, req->actual); if (length < 0) goto length_err; req->length -= length; req->actual -= length; } if (req->actual < ETH_HLEN || ETH_FRAME_LEN < req->actual) { length_err: dev->stats.rx_errors++; dev->stats.rx_length_errors++; debug("rx length %d\n", req->length); break; } dev->stats.rx_packets++; dev->stats.rx_bytes += req->length; break; /* software-driven interface shutdown */ case -ECONNRESET: /* unlink */ case -ESHUTDOWN: /* disconnect etc */ /* for hardware automagic (such as pxa) */ case -ECONNABORTED: /* endpoint reset */ break; /* data overrun */ case -EOVERFLOW: dev->stats.rx_over_errors++; /* FALLTHROUGH */ default: dev->stats.rx_errors++; break; } packet_received = 1; } 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 fail1; dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0); if (!dev->rx_req) goto fail2; return 0; fail2: usb_ep_free_request(dev->in_ep, dev->tx_req); fail1: error("can't alloc requests"); return -1; } static void tx_complete(struct usb_ep *ep, struct usb_request *req) { struct eth_dev *dev = ep->driver_data; debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok"); switch (req->status) { default: dev->stats.tx_errors++; debug("tx err %d\n", req->status); /* FALLTHROUGH */ case -ECONNRESET: /* unlink */ case -ESHUTDOWN: /* disconnect etc */ break; case 0: dev->stats.tx_bytes += req->length; } dev->stats.tx_packets++; 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_ethaddr(dest)) { u16 type; /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host * SET_ETHERNET_MULTICAST_FILTERS requests */ if (is_broadcast_ethaddr(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__); rndis_deregister(dev->rndis_config); rndis_exit(); /* 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);*/ dev->gadget = NULL; set_gadget_data(gadget, NULL); } static void eth_disconnect(struct usb_gadget *gadget) { eth_reset_config(get_gadget_data(gadget)); /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */ } static void eth_suspend(struct usb_gadget *gadget) { /* Not used */ } static void eth_resume(struct usb_gadget *gadget) { /* Not used */ } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_USB_ETH_RNDIS /* * The interrupt endpoint is used in RNDIS to notify the host when messages * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even * REMOTE_NDIS_KEEPALIVE_MSG. * * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and * normally just one notification will be queued. */ static void rndis_control_ack_complete(struct usb_ep *ep, struct usb_request *req) { struct eth_dev *dev = ep->driver_data; debug("%s...\n", __func__); if (req->status || req->actual != req->length) debug("rndis control ack complete --> %d, %d/%d\n", req->status, req->actual, req->length); if (!l_ethdev.network_started) { if (rndis_get_state(dev->rndis_config) == RNDIS_DATA_INITIALIZED) { l_ethdev.network_started = 1; printf("USB RNDIS network up!\n"); } } req->context = NULL; if (req != dev->stat_req) usb_ep_free_request(ep, req); } static char rndis_resp_buf[8] __attribute__((aligned(sizeof(__le32)))); static int rndis_control_ack(struct eth_device *net) { struct eth_dev *dev = &l_ethdev; int length; struct usb_request *resp = dev->stat_req; /* in case RNDIS calls this after disconnect */ if (!dev->status) { debug("status ENODEV\n"); return -ENODEV; } /* in case queue length > 1 */ if (resp->context) { resp = usb_ep_alloc_request(dev->status_ep, GFP_ATOMIC); if (!resp) return -ENOMEM; resp->buf = rndis_resp_buf; } /* * Send RNDIS RESPONSE_AVAILABLE notification; * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too */ resp->length = 8; resp->complete = rndis_control_ack_complete; resp->context = dev; *((__le32 *) resp->buf) = __constant_cpu_to_le32(1); *((__le32 *) (resp->buf + 4)) = __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; } #else #define rndis_control_ack NULL #endif /* RNDIS */ static void eth_start(struct eth_dev *dev, gfp_t gfp_flags) { if (rndis_active(dev)) { rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, BITRATE(dev->gadget)/100); rndis_signal_connect(dev->rndis_config); } } static int eth_stop(struct eth_dev *dev) { #ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT unsigned long ts; unsigned long timeout = CONFIG_SYS_HZ; /* 1 sec to stop RNDIS */ #endif if (rndis_active(dev)) { rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0); rndis_signal_disconnect(dev->rndis_config); #ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT /* Wait until host receives OID_GEN_MEDIA_CONNECT_STATUS */ ts = get_timer(0); while (get_timer(ts) < timeout) usb_gadget_handle_interrupts(0); #endif rndis_uninit(dev->rndis_config); dev->rndis = 0; } return 0; } /*-------------------------------------------------------------------------*/ 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; } /* Now check the contents. */ return is_valid_ethaddr(ea); } 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_ethaddr(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, rndis = 1; struct usb_ep *in_ep, *out_ep, *status_ep = NULL; int status = -ENOMEM; int gcnum; u8 tmp[7]; /* these flags are only ever cleared; compiler take note */ #ifndef CONFIG_USB_ETH_CDC cdc = 0; #endif #ifndef CONFIG_USB_ETH_RNDIS rndis = 0; #endif /* * Because most host side USB stacks handle CDC Ethernet, that * standard protocol is _strongly_ preferred for interop purposes. * (By everyone except Microsoft.) */ if (gadget_is_pxa(gadget)) { /* pxa doesn't support altsettings */ cdc = 0; } else if (gadget_is_musbhdrc(gadget)) { /* reduce tx dma overhead by avoiding special cases */ zlp = 0; } else if (gadget_is_sh(gadget)) { /* sh doesn't support multiple interfaces or configs */ cdc = 0; rndis = 0; } else if (gadget_is_sa1100(gadget)) { /* hardware can't write zlps */ zlp = 0; /* * sa1100 CAN do CDC, without status endpoint ... we use * non-CDC to be compatible with ARM Linux-2.4 "usb-eth". */ cdc = 0; } gcnum = usb_gadget_controller_number(gadget); if (gcnum >= 0) device_desc.bcdDevice = cpu_to_le16(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; } /* * 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) { #if defined(CONFIG_USB_RNDIS_VENDOR_ID) && defined(CONFIG_USB_RNDIS_PRODUCT_ID) device_desc.idVendor = __constant_cpu_to_le16(CONFIG_USB_RNDIS_VENDOR_ID); device_desc.idProduct = __constant_cpu_to_le16(CONFIG_USB_RNDIS_PRODUCT_ID); #else device_desc.idVendor = __constant_cpu_to_le16(RNDIS_VENDOR_NUM); device_desc.idProduct = __constant_cpu_to_le16(RNDIS_PRODUCT_NUM); #endif sprintf(product_desc, "RNDIS/%s", driver_desc); /* * CDC subset ... recognized by Linux since 2.4.10, but Windows * drivers aren't widely available. (That may be improved by * supporting one submode of the "SAFE" variant of MDLM.) */ } else { #if 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); #else if (!cdc) { device_desc.idVendor = __constant_cpu_to_le16(SIMPLE_VENDOR_NUM); device_desc.idProduct = __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM); } #endif } /* support optional vendor/distro customization */ 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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) /* * CDC Ethernet control interface doesn't require a status endpoint. * Since some hosts expect one, try to allocate one anyway. */ if (cdc || rndis) { status_ep = usb_ep_autoconfig(gadget, &fs_status_desc); if (status_ep) { status_ep->driver_data = status_ep; /* claim */ } else if (rndis) { error("can't run RNDIS on %s", gadget->name); return -ENODEV; #ifdef CONFIG_USB_ETH_CDC } else if (cdc) { control_intf.bNumEndpoints = 0; /* FIXME remove endpoint from descriptor list */ #endif } } #endif /* one config: cdc, else minimal subset */ if (!cdc) { eth_config.bNumInterfaces = 1; eth_config.iConfiguration = STRING_SUBSET; /* * use functions to set these up, in case we're built to work * with multiple controllers and must override CDC Ethernet. */ fs_subset_descriptors(); hs_subset_descriptors(); } usb_gadget_set_selfpowered(gadget); /* For now RNDIS is always a second config */ if (rndis) device_desc.bNumConfigurations = 2; if (gadget_is_dualspeed(gadget)) { if (rndis) dev_qualifier.bNumConfigurations = 2; else if (!cdc) dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC; /* assumes ep0 uses the same value for both speeds ... */ dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; /* and that all endpoints are dual-speed */ hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress; hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress; #if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) if (status_ep) hs_status_desc.bEndpointAddress = fs_status_desc.bEndpointAddress; #endif } if (gadget_is_otg(gadget)) { otg_descriptor.bmAttributes |= USB_OTG_HNP, eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; eth_config.bMaxPower = 4; #ifdef CONFIG_USB_ETH_RNDIS rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; rndis_config.bMaxPower = 4; #endif } /* network device setup */ dev->net = &l_netdev; dev->cdc = cdc; dev->zlp = zlp; dev->in_ep = in_ep; dev->out_ep = out_ep; dev->status_ep = status_ep; /* * Module params for these addresses should come from ID proms. * The host side address is used with CDC and RNDIS, and commonly * ends up in a persistent config database. It's not clear if * host side code for the SAFE thing cares -- its original BLAN * thing didn't, Sharp never assigned those addresses on Zaurii. */ 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]); if (rndis) { status = rndis_init(); if (status < 0) { error("can't init RNDIS, %d", status); goto fail; } } /* * 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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS) 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" */ 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 || rndis) 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]); 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: eth_unbind(gadget); debug("RNDIS setup failed\n"); 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->mtu, &dev->stats, &dev->cdc_filter)) goto fail0; if (rndis_set_param_vendor(dev->rndis_config, vendorID, manufacturer)) goto fail0; if (rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0)) goto fail0; printf("RNDIS ready\n"); } return 0; fail: error("%s failed, status = %d", __func__, status); eth_unbind(gadget); return status; } /*-------------------------------------------------------------------------*/ 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; } board_usb_init(0, USB_INIT_DEVICE); /* Configure default mac-addresses for the USB ethernet device */ #ifdef CONFIG_USBNET_DEV_ADDR strlcpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr)); #endif #ifdef CONFIG_USBNET_HOST_ADDR strlcpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr)); #endif /* Check if the user overruled the MAC addresses */ if (getenv("usbnet_devaddr")) strlcpy(dev_addr, getenv("usbnet_devaddr"), sizeof(dev_addr)); if (getenv("usbnet_hostaddr")) strlcpy(host_addr, getenv("usbnet_hostaddr"), sizeof(host_addr)); if (!is_eth_addr_valid(dev_addr)) { error("Need valid 'usbnet_devaddr' to be set"); goto fail; } if (!is_eth_addr_valid(host_addr)) { error("Need valid 'usbnet_hostaddr' to be set"); goto fail; } if (usb_gadget_register_driver(ð_driver) < 0) goto fail; dev->network_started = 0; 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(0); } packet_received = 0; rx_submit(dev, dev->rx_req, 0); return 0; fail: return -1; } static int usb_eth_send(struct eth_device *netdev, void *packet, int length) { int retval; void *rndis_pkt = NULL; struct eth_dev *dev = &l_ethdev; struct usb_request *req = dev->tx_req; unsigned long ts; unsigned long timeout = USB_CONNECT_TIMEOUT; debug("%s:...\n", __func__); /* new buffer is needed to include RNDIS header */ if (rndis_active(dev)) { rndis_pkt = malloc(length + sizeof(struct rndis_packet_msg_type)); if (!rndis_pkt) { error("No memory to alloc RNDIS packet"); goto drop; } rndis_add_hdr(rndis_pkt, length); memcpy(rndis_pkt + sizeof(struct rndis_packet_msg_type), packet, length); packet = rndis_pkt; length += sizeof(struct rndis_packet_msg_type); } req->buf = 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(0); } if (rndis_pkt) free(rndis_pkt); return 0; drop: dev->stats.tx_dropped++; return -ENOMEM; } static int usb_eth_recv(struct eth_device *netdev) { struct eth_dev *dev = &l_ethdev; usb_gadget_handle_interrupts(0); if (packet_received) { debug("%s: packet received\n", __func__); if (dev->rx_req) { net_process_received_packet(net_rx_packets[0], dev->rx_req->length); packet_received = 0; 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; } /* If the gadget not registered, simple return */ if (!dev->gadget) return; /* * Some USB controllers may need additional deinitialization here * before dropping pull-up (also due to hardware issues). * For example: unhandled interrupt with status stage started may * bring the controller to fully broken state (until board reset). * There are some variants to debug and fix such cases: * 1) In the case of RNDIS connection eth_stop can perform additional * interrupt handling. See RNDIS_COMPLETE_SIGNAL_DISCONNECT definition. * 2) 'pullup' callback in your UDC driver can be improved to perform * this deinitialization. */ eth_stop(dev); usb_gadget_disconnect(dev->gadget); /* Clear pending interrupt */ if (dev->network_started) { usb_gadget_handle_interrupts(0); dev->network_started = 0; } usb_gadget_unregister_driver(ð_driver); board_usb_cleanup(0, USB_INIT_DEVICE); } 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) { struct eth_device *netdev = &l_netdev; strlcpy(netdev->name, USB_NET_NAME, sizeof(netdev->name)); 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 eth_register(netdev); return 0; }