/* * ether.c -- Ethernet gadget driver, with CDC and non-CDC options * * Copyright (C) 2003-2004 David Brownell * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ // #define DEBUG 1 // #define VERBOSE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gadget_chips.h" /*-------------------------------------------------------------------------*/ /* * Ethernet gadget driver -- with CDC and non-CDC options * * CDC Ethernet is the standard USB solution for sending Ethernet frames * using USB. Real hardware tends to use the same framing protocol but look * different for control features. This driver strongly prefers to use * this USB-IF standard as its open-systems interoperability solution; * most host side USB stacks (except from Microsoft) support it. * * There's some hardware that can't talk CDC. We make that hardware * implement a "minimalist" vendor-agnostic CDC core: same framing, but * link-level setup only requires activating the configuration. * Linux supports it, but other host operating systems may not. * (This is a subset of CDC Ethernet.) * * A third option is also in use. Rather than CDC Ethernet, or something * simpler, Microsoft pushes their own approach: RNDIS. The published * RNDIS specs are ambiguous and appear to be incomplete, and are also * needlessly complex. */ #define DRIVER_DESC "Ethernet Gadget" #define DRIVER_VERSION "St Patrick's Day 2004" static const char shortname [] = "ether"; static const char driver_desc [] = DRIVER_DESC; #define RX_EXTRA 20 /* guard against rx overflows */ #ifdef CONFIG_USB_ETH_RNDIS #include "rndis.h" #else #define rndis_init() 0 #define rndis_exit() do{}while(0) #endif /*-------------------------------------------------------------------------*/ struct eth_dev { spinlock_t lock; struct usb_gadget *gadget; struct usb_request *req; /* for control responses */ u8 config; struct usb_ep *in_ep, *out_ep, *status_ep; const struct usb_endpoint_descriptor *in, *out, *status; struct list_head tx_reqs, rx_reqs; struct net_device *net; struct net_device_stats stats; atomic_t tx_qlen; struct work_struct work; unsigned zlp:1; unsigned cdc:1; unsigned rndis:1; unsigned long todo; #define WORK_RX_MEMORY 0 int rndis_config; u8 host_mac [ETH_ALEN]; }; /* This version autoconfigures as much as possible at run-time. * * It also ASSUMES a self-powered device, without remote wakeup, * although remote wakeup support would make sense. */ static const char *EP_IN_NAME; static const char *EP_OUT_NAME; static const char *EP_STATUS_NAME; /*-------------------------------------------------------------------------*/ /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! * Instead: allocate your own, using normal USB-IF procedures. */ /* Thanks to NetChip Technologies for donating this product ID. * It's for devices with only CDC Ethernet configurations. */ #define CDC_VENDOR_NUM 0x0525 /* NetChip */ #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ /* For hardware that can't talk CDC, we use the same vendor ID that * ARM Linux has used for ethernet-over-usb, both with sa1100 and * with pxa250. We're protocol-compatible, if the host-side drivers * use the endpoint descriptors. bcdDevice (version) is nonzero, so * drivers that need to hard-wire endpoint numbers have a hook. * * The protocol is a minimal subset of CDC Ether, which works on any bulk * hardware that's not deeply broken ... even on hardware that can't talk * RNDIS (like SA-1100, with no interrupt endpoint, or anything that * doesn't handle control-OUT). */ #define SIMPLE_VENDOR_NUM 0x049f #define SIMPLE_PRODUCT_NUM 0x505a /* For hardware that can talk RNDIS and either of the above protocols, * use this ID ... the windows INF files will know it. Unless it's * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose * the non-RNDIS configuration. */ #define RNDIS_VENDOR_NUM 0x0525 /* NetChip */ #define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */ /* Some systems will want different product identifers published in the * device descriptor, either numbers or strings or both. These string * parameters are in UTF-8 (superset of ASCII's 7 bit characters). */ static ushort __initdata idVendor; module_param(idVendor, ushort, S_IRUGO); MODULE_PARM_DESC(idVendor, "USB Vendor ID"); static ushort __initdata idProduct; module_param(idProduct, ushort, S_IRUGO); MODULE_PARM_DESC(idProduct, "USB Product ID"); static ushort __initdata bcdDevice; module_param(bcdDevice, ushort, S_IRUGO); MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); static char *__initdata iManufacturer; module_param(iManufacturer, charp, S_IRUGO); MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); static char *__initdata iProduct; module_param(iProduct, charp, S_IRUGO); MODULE_PARM_DESC(iProduct, "USB Product string"); /*-------------------------------------------------------------------------*/ /* Include CDC support if we could run on CDC-capable hardware. */ #ifdef CONFIG_USB_GADGET_NET2280 #define DEV_CONFIG_CDC #endif #ifdef CONFIG_USB_GADGET_DUMMY_HCD #define DEV_CONFIG_CDC #endif #ifdef CONFIG_USB_GADGET_GOKU #define DEV_CONFIG_CDC #endif #ifdef CONFIG_USB_GADGET_MQ11XX #define DEV_CONFIG_CDC #endif #ifdef CONFIG_USB_GADGET_OMAP #define DEV_CONFIG_CDC #endif /* For CDC-incapable hardware, choose the simple cdc subset. * Anything that talks bulk (without notable bugs) can do this. */ #ifdef CONFIG_USB_GADGET_PXA #define DEV_CONFIG_SUBSET #endif #ifdef CONFIG_USB_GADGET_SH #define DEV_CONFIG_SUBSET #endif #ifdef CONFIG_USB_GADGET_SA1100 /* use non-CDC for backwards compatibility */ #define DEV_CONFIG_SUBSET #endif /*-------------------------------------------------------------------------*/ #define DEFAULT_QLEN 2 /* double buffering by default */ #ifdef CONFIG_USB_GADGET_DUALSPEED static unsigned qmult = 5; module_param (qmult, uint, S_IRUGO|S_IWUSR); /* for dual-speed hardware, use deeper queues at highspeed */ #define qlen(gadget) \ (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1)) /* also defer IRQs on highspeed TX */ #define TX_DELAY qmult #define BITRATE(g) ((g->speed == USB_SPEED_HIGH) ? 4800000 : 120000) #else /* full speed (low speed doesn't do bulk) */ #define qlen(gadget) DEFAULT_QLEN #define BITRATE(g) (12000) #endif /*-------------------------------------------------------------------------*/ #define xprintk(d,level,fmt,args...) \ printk(level "%s: " fmt , (d)->net->name , ## args) #ifdef DEBUG #undef DEBUG #define DEBUG(dev,fmt,args...) \ xprintk(dev , KERN_DEBUG , fmt , ## args) #else #define DEBUG(dev,fmt,args...) \ do { } while (0) #endif /* DEBUG */ #ifdef VERBOSE #define VDEBUG DEBUG #else #define VDEBUG(dev,fmt,args...) \ do { } while (0) #endif /* DEBUG */ #define ERROR(dev,fmt,args...) \ xprintk(dev , KERN_ERR , fmt , ## args) #define WARN(dev,fmt,args...) \ xprintk(dev , KERN_WARNING , fmt , ## args) #define INFO(dev,fmt,args...) \ xprintk(dev , KERN_INFO , fmt , ## args) /*-------------------------------------------------------------------------*/ /* USB DRIVER HOOKUP (to the hardware driver, below us), mostly * ep0 implementation: descriptors, config management, setup(). * also optional class-specific notification interrupt transfer. */ /* * DESCRIPTORS ... most are static, but strings and (full) configuration * descriptors are built on demand. For now we do either full CDC, or * our simple subset, with RNDIS as an optional second configuration. * * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But * the class descriptors match a modem (they're ignored; it's really just * Ethernet functionality), they don't need the NOP altsetting, and the * status transfer endpoint isn't optional. */ #define STRING_MANUFACTURER 1 #define STRING_PRODUCT 2 #define STRING_ETHADDR 3 #define STRING_DATA 4 #define STRING_CONTROL 5 #define STRING_RNDIS_CONTROL 6 #define STRING_CDC 7 #define STRING_SUBSET 8 #define STRING_RNDIS 9 #define USB_BUFSIZ 256 /* holds our biggest descriptor */ /* * This device advertises one configuration, eth_config, unless RNDIS * is enabled (rndis_config) on hardware supporting at least two configs. * * NOTE: Controllers like superh_udc should probably be able to use * an RNDIS-only configuration. */ #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_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 const 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. */ #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 = 6, /* ethernet control model */ .bInterfaceProtocol = 0, .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 = 2, /* abstract control model */ .bInterfaceProtocol = 0xff, /* vendor specific */ .iInterface = STRING_RNDIS_CONTROL, }; #endif #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) /* "Header Functional Descriptor" from CDC spec 5.2.3.1 */ struct header_desc { u8 bLength; u8 bDescriptorType; u8 bDescriptorSubType; u16 bcdCDC; } __attribute__ ((packed)); static const struct header_desc header_desc = { .bLength = sizeof header_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = 0, .bcdCDC = __constant_cpu_to_le16 (0x0110), }; /* "Union Functional Descriptor" from CDC spec 5.2.3.8 */ struct union_desc { u8 bLength; u8 bDescriptorType; u8 bDescriptorSubType; u8 bMasterInterface0; u8 bSlaveInterface0; /* ... and there could be other slave interfaces */ } __attribute__ ((packed)); static const struct union_desc union_desc = { .bLength = sizeof union_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = 6, .bMasterInterface0 = 0, /* index of control interface */ .bSlaveInterface0 = 1, /* index of DATA interface */ }; #endif /* CDC || RNDIS */ #ifdef CONFIG_USB_ETH_RNDIS /* "Call Management Descriptor" from CDC spec 5.2.3.3 */ struct call_mgmt_descriptor { u8 bLength; u8 bDescriptorType; u8 bDescriptorSubType; u8 bmCapabilities; u8 bDataInterface; } __attribute__ ((packed)); static const struct call_mgmt_descriptor call_mgmt_descriptor = { .bLength = sizeof call_mgmt_descriptor, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = 0x01, .bmCapabilities = 0x00, .bDataInterface = 0x01, }; /* "Abstract Control Management Descriptor" from CDC spec 5.2.3.4 */ struct acm_descriptor { u8 bLength; u8 bDescriptorType; u8 bDescriptorSubType; u8 bmCapabilities; } __attribute__ ((packed)); static struct acm_descriptor acm_descriptor = { .bLength = sizeof acm_descriptor, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = 0x02, .bmCapabilities = 0X00, }; #endif #ifdef DEV_CONFIG_CDC /* "Ethernet Networking Functional Descriptor" from CDC spec 5.2.3.16 */ struct ether_desc { u8 bLength; u8 bDescriptorType; u8 bDescriptorSubType; u8 iMACAddress; u32 bmEthernetStatistics; u16 wMaxSegmentSize; u16 wNumberMCFilters; u8 bNumberPowerFilters; } __attribute__ ((packed)); static const struct ether_desc ether_desc = { .bLength = sizeof ether_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = 0x0f, /* this descriptor actually adds value, surprise! */ .iMACAddress = STRING_ETHADDR, .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */ .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN), .wNumberMCFilters = __constant_cpu_to_le16 (0), .bNumberPowerFilters = 0, }; #endif #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) /* include the status endpoint if we can, even where it's optional. * use small wMaxPacketSize, since many "interrupt" endpoints have * very small fifos and it's no big deal if CDC_NOTIFY_SPEED_CHANGE * takes two packets. also default to 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 8 /* 8 byte header + data */ static struct usb_endpoint_descriptor fs_status_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, }; #endif #ifdef DEV_CONFIG_CDC /* the default data interface has no endpoints ... */ static const struct usb_interface_descriptor data_nop_intf = { .bLength = sizeof data_nop_intf, .bDescriptorType = USB_DT_INTERFACE, .bInterfaceNumber = 1, .bAlternateSetting = 0, .bNumEndpoints = 0, .bInterfaceClass = USB_CLASS_CDC_DATA, .bInterfaceSubClass = 0, .bInterfaceProtocol = 0, }; /* ... but the "real" data interface has two bulk endpoints */ static const struct usb_interface_descriptor data_intf = { .bLength = sizeof data_intf, .bDescriptorType = USB_DT_INTERFACE, .bInterfaceNumber = 1, .bAlternateSetting = 1, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_CDC_DATA, .bInterfaceSubClass = 0, .bInterfaceProtocol = 0, .iInterface = STRING_DATA, }; #endif #ifdef CONFIG_USB_ETH_RNDIS /* RNDIS doesn't activate by changing to the "real" altsetting */ static const struct usb_interface_descriptor rndis_data_intf = { .bLength = sizeof rndis_data_intf, .bDescriptorType = USB_DT_INTERFACE, .bInterfaceNumber = 1, .bAlternateSetting = 0, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_CDC_DATA, .bInterfaceSubClass = 0, .bInterfaceProtocol = 0, .iInterface = STRING_DATA, }; #endif #ifdef DEV_CONFIG_SUBSET /* * "Simple" CDC-subset option is a simple vendor-neutral model that most * full speed controllers can handle: one interface, two bulk endpoints. */ static const struct usb_interface_descriptor subset_data_intf = { .bLength = sizeof subset_data_intf, .bDescriptorType = USB_DT_INTERFACE, .bInterfaceNumber = 0, .bAlternateSetting = 0, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 0, .bInterfaceProtocol = 0, .iInterface = STRING_DATA, }; #endif /* SUBSET */ static struct usb_endpoint_descriptor fs_source_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, }; static struct usb_endpoint_descriptor fs_sink_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, }; static const struct usb_descriptor_header *fs_eth_function [10] = { #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, 0, #endif /* DEV_CONFIG_CDC */ }; static inline void __init fs_subset_descriptors(void) { #ifdef DEV_CONFIG_SUBSET fs_eth_function[0] = (struct usb_descriptor_header *) &subset_data_intf; fs_eth_function[1] = (struct usb_descriptor_header *) &fs_source_desc; fs_eth_function[2] = (struct usb_descriptor_header *) &fs_sink_desc; fs_eth_function[3] = 0; #else fs_eth_function[0] = 0; #endif } #ifdef CONFIG_USB_ETH_RNDIS static const struct usb_descriptor_header *fs_rndis_function [] = { /* 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, 0, }; #endif #ifdef CONFIG_USB_GADGET_DUALSPEED /* * usb 2.0 devices need to expose both high speed and full speed * descriptors, unless they only run at full speed. */ #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) static struct usb_endpoint_descriptor hs_status_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, }; #endif /* DEV_CONFIG_CDC */ static struct usb_endpoint_descriptor hs_source_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = __constant_cpu_to_le16 (512), }; static struct usb_endpoint_descriptor hs_sink_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = __constant_cpu_to_le16 (512), }; static struct usb_qualifier_descriptor dev_qualifier = { .bLength = sizeof dev_qualifier, .bDescriptorType = USB_DT_DEVICE_QUALIFIER, .bcdUSB = __constant_cpu_to_le16 (0x0200), .bDeviceClass = USB_CLASS_COMM, .bNumConfigurations = 1, }; static const struct usb_descriptor_header *hs_eth_function [10] = { #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, 0, #endif /* DEV_CONFIG_CDC */ }; static inline void __init hs_subset_descriptors(void) { #ifdef DEV_CONFIG_SUBSET hs_eth_function[0] = (struct usb_descriptor_header *) &subset_data_intf; hs_eth_function[1] = (struct usb_descriptor_header *) &fs_source_desc; hs_eth_function[2] = (struct usb_descriptor_header *) &fs_sink_desc; hs_eth_function[3] = 0; #else hs_eth_function[0] = 0; #endif } #ifdef CONFIG_USB_ETH_RNDIS static const struct usb_descriptor_header *hs_rndis_function [] = { /* 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, 0, }; #endif /* maxpacket and other transfer characteristics vary by speed. */ #define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs)) #else /* if there's no high speed support, maxpacket doesn't change. */ #define ep_desc(g,hs,fs) fs static inline void __init hs_subset_descriptors(void) { } #endif /* !CONFIG_USB_GADGET_DUALSPEED */ /*-------------------------------------------------------------------------*/ /* descriptors that are built on-demand */ static char manufacturer [40]; static char product_desc [40] = DRIVER_DESC; #ifdef DEV_CONFIG_CDC /* address that the host will use ... usually assigned at random */ static char ethaddr [2 * ETH_ALEN + 1]; #endif /* static strings, in iso 8859/1 */ static struct usb_string strings [] = { { STRING_MANUFACTURER, manufacturer, }, { STRING_PRODUCT, product_desc, }, { STRING_DATA, "Ethernet Data", }, #ifdef DEV_CONFIG_CDC { STRING_CDC, "CDC Ethernet", }, { STRING_ETHADDR, ethaddr, }, { STRING_CONTROL, "CDC Communications Control", }, #endif #ifdef DEV_CONFIG_SUBSET { STRING_SUBSET, "CDC Ethernet Subset", }, #endif #ifdef CONFIG_USB_ETH_RNDIS { STRING_RNDIS, "RNDIS", }, { STRING_RNDIS_CONTROL, "RNDIS Communications Control", }, #endif { } /* end of list */ }; static struct usb_gadget_strings stringtab = { .language = 0x0409, /* en-us */ .strings = strings, }; /* * one config, two interfaces: control, data. * complications: class descriptors, and an altsetting. */ static int config_buf (enum usb_device_speed speed, u8 *buf, u8 type, unsigned index) { int len; #ifdef CONFIG_USB_GADGET_DUALSPEED int hs = (speed == USB_SPEED_HIGH); if (type == USB_DT_OTHER_SPEED_CONFIG) hs = !hs; #define which_config(t) (hs ? & t ## _config : & t ## _config) #define which_fn(t) (hs ? & hs_ ## t ## _function : & fs_ ## t ## _function) #else #define which_config(t) (& t ## _config) #define which_fn(t) (& fs_ ## t ## _function) #endif if (index >= device_desc.bNumConfigurations) return -EINVAL; #ifdef CONFIG_USB_ETH_RNDIS /* list the RNDIS config first, to make Microsoft's drivers * happy. DOCSIS 1.0 needs this too. */ if (device_desc.bNumConfigurations == 2 && index == 0) len = usb_gadget_config_buf (which_config (rndis), buf, USB_BUFSIZ, (const struct usb_descriptor_header **) which_fn (rndis)); else #endif len = usb_gadget_config_buf (which_config (eth), buf, USB_BUFSIZ, (const struct usb_descriptor_header **) which_fn (eth)); if (len < 0) return len; ((struct usb_config_descriptor *) buf)->bDescriptorType = type; return len; } /*-------------------------------------------------------------------------*/ static void eth_start (struct eth_dev *dev, int gfp_flags); static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags); #ifdef DEV_CONFIG_CDC static inline int ether_alt_ep_setup (struct eth_dev *dev, struct usb_ep *ep) { const struct usb_endpoint_descriptor *d; /* With CDC, the host isn't allowed to use these two data * endpoints in the default altsetting for the interface. * so we don't activate them yet. Reset from SET_INTERFACE. * * Strictly speaking RNDIS should work the same: activation is * a side effect of setting a packet filter. Deactivation is * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG. */ /* one endpoint writes data back IN to the host */ if (strcmp (ep->name, EP_IN_NAME) == 0) { d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc); ep->driver_data = dev; dev->in_ep = ep; dev->in = d; /* one endpoint just reads OUT packets */ } else if (strcmp (ep->name, EP_OUT_NAME) == 0) { d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc); ep->driver_data = dev; dev->out_ep = ep; dev->out = d; /* optional status/notification endpoint */ } else if (EP_STATUS_NAME && strcmp (ep->name, EP_STATUS_NAME) == 0) { int result; d = ep_desc (dev->gadget, &hs_status_desc, &fs_status_desc); result = usb_ep_enable (ep, d); if (result < 0) return result; ep->driver_data = dev; dev->status_ep = ep; dev->status = d; } return 0; } #endif #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) static inline int ether_ep_setup (struct eth_dev *dev, struct usb_ep *ep) { int result; const struct usb_endpoint_descriptor *d; /* CDC subset is simpler: if the device is there, * it's live with rx and tx endpoints. * * Do this as a shortcut for RNDIS too. */ /* one endpoint writes data back IN to the host */ if (strcmp (ep->name, EP_IN_NAME) == 0) { d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc); result = usb_ep_enable (ep, d); if (result < 0) return result; ep->driver_data = dev; dev->in_ep = ep; dev->in = d; /* one endpoint just reads OUT packets */ } else if (strcmp (ep->name, EP_OUT_NAME) == 0) { d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc); result = usb_ep_enable (ep, d); if (result < 0) return result; ep->driver_data = dev; dev->out_ep = ep; dev->out = d; } return 0; } #endif static int set_ether_config (struct eth_dev *dev, int gfp_flags) { int result = 0; struct usb_ep *ep; struct usb_gadget *gadget = dev->gadget; gadget_for_each_ep (ep, gadget) { #ifdef DEV_CONFIG_CDC if (!dev->rndis && dev->cdc) { result = ether_alt_ep_setup (dev, ep); if (result == 0) continue; } #endif #ifdef CONFIG_USB_ETH_RNDIS if (dev->rndis && strcmp (ep->name, EP_STATUS_NAME) == 0) { const struct usb_endpoint_descriptor *d; d = ep_desc (gadget, &hs_status_desc, &fs_status_desc); result = usb_ep_enable (ep, d); if (result == 0) { ep->driver_data = dev; dev->status_ep = ep; dev->status = d; continue; } } else #endif { #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) result = ether_ep_setup (dev, ep); if (result == 0) continue; #endif } /* stop on error */ ERROR (dev, "can't enable %s, result %d\n", ep->name, result); break; } if (!result && (!dev->in_ep || !dev->out_ep)) result = -ENODEV; if (result == 0) result = alloc_requests (dev, qlen (gadget), gfp_flags); /* on error, disable any endpoints */ if (result < 0) { #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) if (dev->status_ep) (void) usb_ep_disable (dev->status_ep); #endif dev->status_ep = 0; dev->status = 0; #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) if (dev->rndis || !dev->cdc) { if (dev->in_ep) (void) usb_ep_disable (dev->in_ep); if (dev->out_ep) (void) usb_ep_disable (dev->out_ep); } #endif dev->in_ep = 0; dev->in = 0; dev->out_ep = 0; dev->out = 0; } else /* activate non-CDC configs right away * this isn't strictly according to the RNDIS spec */ #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) if (dev->rndis || !dev->cdc) { netif_carrier_on (dev->net); if (netif_running (dev->net)) { spin_unlock (&dev->lock); eth_start (dev, GFP_ATOMIC); spin_lock (&dev->lock); } } #endif if (result == 0) DEBUG (dev, "qlen %d\n", qlen (gadget)); /* caller is responsible for cleanup on error */ return result; } static void eth_reset_config (struct eth_dev *dev) { struct usb_request *req; if (dev->config == 0) return; DEBUG (dev, "%s\n", __FUNCTION__); netif_stop_queue (dev->net); netif_carrier_off (dev->net); /* disable endpoints, forcing (synchronous) completion of * pending i/o. then free the requests. */ if (dev->in_ep) { usb_ep_disable (dev->in_ep); while (likely (!list_empty (&dev->tx_reqs))) { req = container_of (dev->tx_reqs.next, struct usb_request, list); list_del (&req->list); usb_ep_free_request (dev->in_ep, req); } dev->in_ep = 0; } if (dev->out_ep) { usb_ep_disable (dev->out_ep); while (likely (!list_empty (&dev->rx_reqs))) { req = container_of (dev->rx_reqs.next, struct usb_request, list); list_del (&req->list); usb_ep_free_request (dev->out_ep, req); } dev->out_ep = 0; } if (dev->status_ep) { usb_ep_disable (dev->status_ep); dev->status_ep = 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, int gfp_flags) { int result = 0; struct usb_gadget *gadget = dev->gadget; if (number == dev->config) return 0; if (gadget_is_sa1100 (gadget) && dev->config && atomic_read (&dev->tx_qlen) != 0) { /* tx fifo is full, but we can't clear it...*/ INFO (dev, "can't change configurations\n"); return -ESPIPE; } eth_reset_config (dev); switch (number) { case DEV_CONFIG_VALUE: dev->rndis = 0; result = set_ether_config (dev, gfp_flags); break; #ifdef CONFIG_USB_ETH_RNDIS case DEV_RNDIS_CONFIG_VALUE: dev->rndis = 1; result = set_ether_config (dev, gfp_flags); break; #endif default: result = -EINVAL; /* FALL THROUGH */ case 0: return result; } if (result) eth_reset_config (dev); else { char *speed; switch (gadget->speed) { case USB_SPEED_FULL: speed = "full"; break; #ifdef CONFIG_USB_GADGET_DUALSPEED case USB_SPEED_HIGH: speed = "high"; break; #endif default: speed = "?"; break; } dev->config = number; INFO (dev, "%s speed config #%d: %s, using %s\n", speed, number, driver_desc, dev->rndis ? "RNDIS" : (dev->cdc ? "CDC Ethernet" : "CDC Ethernet Subset")); } return result; } /*-------------------------------------------------------------------------*/ /* section 3.8.2 table 11 of the CDC spec lists Ethernet notifications * section 3.6.2.1 table 5 specifies ACM notifications, accepted by RNDIS * and RNDIS also defines its own bit-incompatible notifications */ #define CDC_NOTIFY_NETWORK_CONNECTION 0x00 /* required; 6.3.1 */ #define CDC_NOTIFY_RESPONSE_AVAILABLE 0x01 /* optional; 6.3.2 */ #define CDC_NOTIFY_SPEED_CHANGE 0x2a /* required; 6.3.8 */ #ifdef DEV_CONFIG_CDC struct cdc_notification { u8 bmRequestType; u8 bNotificationType; u16 wValue; u16 wIndex; u16 wLength; /* SPEED_CHANGE data looks like this */ u32 data [2]; }; static void eth_status_complete (struct usb_ep *ep, struct usb_request *req) { struct 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 == CDC_NOTIFY_NETWORK_CONNECTION && value == 0) { event->bmRequestType = 0xA1; event->bNotificationType = 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 */ event->data [0] = event->data [1] = (dev->gadget->speed == USB_SPEED_HIGH) ? (13 * 512 * 8 * 1000 * 8) : (19 * 64 * 1 * 1000 * 8); req->length = 16; value = usb_ep_queue (ep, req, GFP_ATOMIC); DEBUG (dev, "send SPEED_CHANGE --> %d\n", value); if (value == 0) return; } else DEBUG (dev, "event %02x --> %d\n", event->bNotificationType, value); /* free when done */ usb_ep_free_buffer (ep, req->buf, req->dma, 16); usb_ep_free_request (ep, req); } static void issue_start_status (struct eth_dev *dev) { struct usb_request *req; struct cdc_notification *event; int value; DEBUG (dev, "%s, flush old status first\n", __FUNCTION__); /* flush old status * * FIXME ugly idiom, maybe we'd be better with just * a "cancel the whole queue" primitive since any * unlink-one primitive has way too many error modes. * here, we "know" toggle is already clear... */ usb_ep_disable (dev->status_ep); usb_ep_enable (dev->status_ep, dev->status); /* FIXME make these allocations static like dev->req */ req = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC); if (req == 0) { DEBUG (dev, "status ENOMEM\n"); return; } req->buf = usb_ep_alloc_buffer (dev->status_ep, 16, &dev->req->dma, GFP_ATOMIC); if (req->buf == 0) { DEBUG (dev, "status buf ENOMEM\n"); free_req: usb_ep_free_request (dev->status_ep, req); return; } /* 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 = CDC_NOTIFY_NETWORK_CONNECTION; event->wValue = __constant_cpu_to_le16 (1); /* connected */ event->wIndex = __constant_cpu_to_le16 (1); event->wLength = 0; req->length = 8; req->complete = eth_status_complete; value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC); if (value < 0) { DEBUG (dev, "status buf queue --> %d\n", value); usb_ep_free_buffer (dev->status_ep, req->buf, dev->req->dma, 16); goto free_req; } } #endif /*-------------------------------------------------------------------------*/ static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req) { if (req->status || req->actual != req->length) DEBUG ((struct eth_dev *) ep->driver_data, "setup complete --> %d, %d/%d\n", req->status, req->actual, req->length); } /* see section 3.8.2 table 10 of the CDC spec for more ethernet * requests, mostly for filters (multicast, pm) and statistics * section 3.6.2.1 table 4 has ACM requests; RNDIS requires the * encapsulated command mechanism. */ #define CDC_SEND_ENCAPSULATED_COMMAND 0x00 /* optional */ #define CDC_GET_ENCAPSULATED_RESPONSE 0x01 /* optional */ #define CDC_SET_ETHERNET_PACKET_FILTER 0x43 /* required */ #ifdef CONFIG_USB_ETH_RNDIS static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req) { struct eth_dev *dev = ep->driver_data; if (req->status || req->actual != req->length) DEBUG (dev, "rndis response complete --> %d, %d/%d\n", req->status, req->actual, req->length); /* done sending after CDC_GET_ENCAPSULATED_RESPONSE */ rndis_free_response (dev->rndis_config, req->buf); } static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req) { struct eth_dev *dev = ep->driver_data; /* received RNDIS command from CDC_SEND_ENCAPSULATED_COMMAND */ spin_lock(&dev->lock); if (rndis_msg_parser (dev->rndis_config, (u8 *) req->buf)) ERROR(dev, "%s: rndis parse error\n", __FUNCTION__ ); spin_unlock(&dev->lock); } #endif /* RNDIS */ /* * The setup() callback implements all the ep0 functionality that's not * handled lower down. CDC has a number of less-common features: * * - two interfaces: control, and ethernet data * - Ethernet data interface has two altsettings: default, and active * - class-specific descriptors for the control interface * - class-specific control requests */ static int eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) { struct eth_dev *dev = get_gadget_data (gadget); struct usb_request *req = dev->req; int value = -EOPNOTSUPP; /* descriptors just go into the pre-allocated ep0 buffer, * while config change events may enable network traffic. */ switch (ctrl->bRequest) { case USB_REQ_GET_DESCRIPTOR: if (ctrl->bRequestType != USB_DIR_IN) break; switch (ctrl->wValue >> 8) { case USB_DT_DEVICE: value = min (ctrl->wLength, (u16) sizeof device_desc); memcpy (req->buf, &device_desc, value); break; #ifdef CONFIG_USB_GADGET_DUALSPEED case USB_DT_DEVICE_QUALIFIER: if (!gadget->is_dualspeed) break; value = min (ctrl->wLength, (u16) sizeof dev_qualifier); memcpy (req->buf, &dev_qualifier, value); break; case USB_DT_OTHER_SPEED_CONFIG: if (!gadget->is_dualspeed) break; // FALLTHROUGH #endif /* CONFIG_USB_GADGET_DUALSPEED */ case USB_DT_CONFIG: value = config_buf (gadget->speed, req->buf, ctrl->wValue >> 8, ctrl->wValue & 0xff); if (value >= 0) value = min (ctrl->wLength, (u16) value); break; case USB_DT_STRING: value = usb_gadget_get_string (&stringtab, ctrl->wValue & 0xff, req->buf); if (value >= 0) value = min (ctrl->wLength, (u16) value); break; } break; case USB_REQ_SET_CONFIGURATION: if (ctrl->bRequestType != 0) break; spin_lock (&dev->lock); value = eth_set_config (dev, ctrl->wValue, GFP_ATOMIC); spin_unlock (&dev->lock); break; case USB_REQ_GET_CONFIGURATION: if (ctrl->bRequestType != USB_DIR_IN) break; *(u8 *)req->buf = dev->config; value = min (ctrl->wLength, (u16) 1); break; case USB_REQ_SET_INTERFACE: if (ctrl->bRequestType != USB_RECIP_INTERFACE || !dev->config || ctrl->wIndex > 1) break; if (!dev->cdc && ctrl->wIndex != 0) break; spin_lock (&dev->lock); /* PXA hardware partially handles SET_INTERFACE; * we need to kluge around that interference. */ if (gadget_is_pxa (gadget)) { value = eth_set_config (dev, DEV_CONFIG_VALUE, GFP_ATOMIC); goto done_set_intf; } #ifdef DEV_CONFIG_CDC switch (ctrl->wIndex) { case 0: /* control/master intf */ if (ctrl->wValue != 0) break; if (dev->status_ep) { usb_ep_disable (dev->status_ep); usb_ep_enable (dev->status_ep, dev->status); } value = 0; break; case 1: /* data intf */ if (ctrl->wValue > 1) break; usb_ep_disable (dev->in_ep); usb_ep_disable (dev->out_ep); /* CDC requires the data transfers not be done from * the default interface setting ... also, setting * the non-default interface clears filters etc. */ if (ctrl->wValue == 1) { usb_ep_enable (dev->in_ep, dev->in); usb_ep_enable (dev->out_ep, dev->out); netif_carrier_on (dev->net); if (dev->status_ep) issue_start_status (dev); if (netif_running (dev->net)) { spin_unlock (&dev->lock); eth_start (dev, GFP_ATOMIC); spin_lock (&dev->lock); } } else { netif_stop_queue (dev->net); netif_carrier_off (dev->net); } value = 0; break; } #else /* FIXME this is wrong, as is the assumption that * all non-PXA hardware talks real CDC ... */ dev_warn (&gadget->dev, "set_interface ignored!\n"); #endif /* DEV_CONFIG_CDC */ done_set_intf: spin_unlock (&dev->lock); break; case USB_REQ_GET_INTERFACE: if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) || !dev->config || ctrl->wIndex > 1) break; if (!(dev->cdc || dev->rndis) && ctrl->wIndex != 0) break; /* for CDC, iff carrier is on, data interface is active. */ if (dev->rndis || ctrl->wIndex != 1) *(u8 *)req->buf = 0; else *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; value = min (ctrl->wLength, (u16) 1); break; #ifdef DEV_CONFIG_CDC case CDC_SET_ETHERNET_PACKET_FILTER: /* see 6.2.30: no data, wIndex = interface, * wValue = packet filter bitmap */ if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) || !dev->cdc || dev->rndis || ctrl->wLength != 0 || ctrl->wIndex > 1) break; DEBUG (dev, "NOP packet filter %04x\n", ctrl->wValue); /* NOTE: table 62 has 5 filter bits to reduce traffic, * and we "must" support multicast and promiscuous. * this NOP implements a bad filter... */ value = 0; break; #endif /* DEV_CONFIG_CDC */ #ifdef CONFIG_USB_ETH_RNDIS /* RNDIS uses the CDC command encapsulation mechanism to implement * an RPC scheme, with much getting/setting of attributes by OID. */ case CDC_SEND_ENCAPSULATED_COMMAND: if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) || !dev->rndis || ctrl->wLength > USB_BUFSIZ || ctrl->wValue || rndis_control_intf.bInterfaceNumber != ctrl->wIndex) break; /* read the request, then process it */ value = ctrl->wLength; req->complete = rndis_command_complete; /* later, rndis_control_ack () sends a notification */ break; case CDC_GET_ENCAPSULATED_RESPONSE: if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE) == ctrl->bRequestType && dev->rndis // && ctrl->wLength >= 0x0400 && !ctrl->wValue && rndis_control_intf.bInterfaceNumber == ctrl->wIndex) { u8 *buf; /* return the result */ buf = rndis_get_next_response (dev->rndis_config, &value); if (buf) { memcpy (req->buf, buf, value); req->complete = rndis_response_complete; } /* else stalls ... spec says to avoid that */ } break; #endif /* RNDIS */ default: VDEBUG (dev, "unknown control req%02x.%02x v%04x i%04x l%d\n", ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex, ctrl->wLength); } /* respond with data transfer before status phase? */ if (value >= 0) { req->length = value; value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC); if (value < 0) { DEBUG (dev, "ep_queue --> %d\n", value); req->status = 0; eth_setup_complete (gadget->ep0, req); } } /* host either stalls (value < 0) or reports success */ return value; } static void eth_disconnect (struct usb_gadget *gadget) { struct eth_dev *dev = get_gadget_data (gadget); unsigned long flags; spin_lock_irqsave (&dev->lock, flags); netif_stop_queue (dev->net); netif_carrier_off (dev->net); eth_reset_config (dev); spin_unlock_irqrestore (&dev->lock, flags); /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */ /* next we may get setup() calls to enumerate new connections; * or an unbind() during shutdown (including removing module). */ } /*-------------------------------------------------------------------------*/ /* NETWORK DRIVER HOOKUP (to the layer above this driver) */ static int eth_change_mtu (struct net_device *net, int new_mtu) { struct eth_dev *dev = (struct eth_dev *) net->priv; // FIXME if rndis, don't change while link's live if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN) return -ERANGE; /* no zero-length packet read wanted after mtu-sized packets */ if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0) return -EDOM; net->mtu = new_mtu; return 0; } static struct net_device_stats *eth_get_stats (struct net_device *net) { return &((struct eth_dev *) net->priv)->stats; } static int eth_ethtool_ioctl (struct net_device *net, void *useraddr) { struct eth_dev *dev = (struct eth_dev *) net->priv; u32 cmd; if (get_user (cmd, (u32 *)useraddr)) return -EFAULT; switch (cmd) { case ETHTOOL_GDRVINFO: { /* get driver info */ struct ethtool_drvinfo info; memset (&info, 0, sizeof info); info.cmd = ETHTOOL_GDRVINFO; strlcpy (info.driver, shortname, sizeof info.driver); strlcpy (info.version, DRIVER_VERSION, sizeof info.version); strlcpy (info.fw_version, dev->gadget->name, sizeof info.fw_version); strlcpy (info.bus_info, dev->gadget->dev.bus_id, sizeof info.bus_info); if (copy_to_user (useraddr, &info, sizeof (info))) return -EFAULT; return 0; } case ETHTOOL_GLINK: { /* get link status */ struct ethtool_value edata = { ETHTOOL_GLINK }; edata.data = (dev->gadget->speed != USB_SPEED_UNKNOWN); if (copy_to_user (useraddr, &edata, sizeof (edata))) return -EFAULT; return 0; } } /* Note that the ethtool user space code requires EOPNOTSUPP */ return -EOPNOTSUPP; } static int eth_ioctl (struct net_device *net, struct ifreq *rq, int cmd) { switch (cmd) { case SIOCETHTOOL: return eth_ethtool_ioctl (net, (void *)rq->ifr_data); default: return -EOPNOTSUPP; } } static void defer_kevent (struct eth_dev *dev, int flag) { if (test_and_set_bit (flag, &dev->todo)) return; if (!schedule_work (&dev->work)) ERROR (dev, "kevent %d may have been dropped\n", flag); else DEBUG (dev, "kevent %d scheduled\n", flag); } static void rx_complete (struct usb_ep *ep, struct usb_request *req); static int rx_submit (struct eth_dev *dev, struct usb_request *req, int gfp_flags) { struct sk_buff *skb; int retval = -ENOMEM; size_t size; /* Padding up to RX_EXTRA handles minor disagreements with host. * Normally we use the USB "terminate on short read" convention; * so allow up to (N*maxpacket)-1, since that memory is normally * already allocated. Major loss of synch means -EOVERFLOW; any * obviously corrupted packets will automatically be discarded. * * RNDIS uses internal framing, and explicitly allows senders to * pad to end-of-packet. That's potentially nice for speed, * but means receivers can't recover synch on their own. */ size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA); size += dev->out_ep->maxpacket - 1; #ifdef CONFIG_USB_ETH_RNDIS if (dev->rndis) size += sizeof (struct rndis_packet_msg_type); #endif size -= size % dev->out_ep->maxpacket; #ifdef CONFIG_USB_ETH_RNDIS if (!dev->rndis) #endif size--; if ((skb = alloc_skb (size, gfp_flags)) == 0) { DEBUG (dev, "no rx skb\n"); goto enomem; } req->buf = skb->data; req->length = size; req->complete = rx_complete; req->context = skb; retval = usb_ep_queue (dev->out_ep, req, gfp_flags); if (retval == -ENOMEM) enomem: defer_kevent (dev, WORK_RX_MEMORY); if (retval) { DEBUG (dev, "rx submit --> %d\n", retval); dev_kfree_skb_any (skb); spin_lock (&dev->lock); list_add (&req->list, &dev->rx_reqs); spin_unlock (&dev->lock); } return retval; } static void rx_complete (struct usb_ep *ep, struct usb_request *req) { struct sk_buff *skb = req->context; struct eth_dev *dev = ep->driver_data; int status = req->status; switch (status) { /* normal completion */ case 0: skb_put (skb, req->actual); #ifdef CONFIG_USB_ETH_RNDIS /* we know MaxPacketsPerTransfer == 1 here */ if (dev->rndis) rndis_rm_hdr (req->buf, &(skb->len)); #endif if (ETH_HLEN > skb->len || skb->len > ETH_FRAME_LEN) { dev->stats.rx_errors++; dev->stats.rx_length_errors++; DEBUG (dev, "rx length %d\n", skb->len); break; } skb->dev = dev->net; skb->protocol = eth_type_trans (skb, dev->net); dev->stats.rx_packets++; dev->stats.rx_bytes += skb->len; /* no buffer copies needed, unless hardware can't * use skb buffers. */ status = netif_rx (skb); skb = 0; break; /* software-driven interface shutdown */ case -ECONNRESET: // unlink case -ESHUTDOWN: // disconnect etc VDEBUG (dev, "rx shutdown, code %d\n", status); goto quiesce; /* for hardware automagic (such as pxa) */ case -ECONNABORTED: // endpoint reset DEBUG (dev, "rx %s reset\n", ep->name); defer_kevent (dev, WORK_RX_MEMORY); quiesce: dev_kfree_skb_any (skb); goto clean; /* data overrun */ case -EOVERFLOW: dev->stats.rx_over_errors++; // FALLTHROUGH default: dev->stats.rx_errors++; DEBUG (dev, "rx status %d\n", status); break; } if (skb) dev_kfree_skb_any (skb); if (!netif_running (dev->net)) { clean: /* nobody reading rx_reqs, so no dev->lock */ list_add (&req->list, &dev->rx_reqs); req = 0; } if (req) rx_submit (dev, req, GFP_ATOMIC); } static int prealloc (struct list_head *list, struct usb_ep *ep, unsigned n, int gfp_flags) { unsigned i; struct usb_request *req; if (!n) return -ENOMEM; /* queue/recycle up to N requests */ i = n; list_for_each_entry (req, list, list) { if (i-- == 0) goto extra; } while (i--) { req = usb_ep_alloc_request (ep, gfp_flags); if (!req) return list_empty (list) ? -ENOMEM : 0; list_add (&req->list, list); } return 0; extra: /* free extras */ for (;;) { struct list_head *next; next = req->list.next; list_del (&req->list); usb_ep_free_request (ep, req); if (next == list) break; req = container_of (next, struct usb_request, list); } return 0; } static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags) { int status; status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags); if (status < 0) goto fail; status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags); if (status < 0) goto fail; return 0; fail: DEBUG (dev, "can't alloc requests\n"); return status; } static void rx_fill (struct eth_dev *dev, int gfp_flags) { struct usb_request *req; unsigned long flags; clear_bit (WORK_RX_MEMORY, &dev->todo); /* fill unused rxq slots with some skb */ spin_lock_irqsave (&dev->lock, flags); while (!list_empty (&dev->rx_reqs)) { req = container_of (dev->rx_reqs.next, struct usb_request, list); list_del_init (&req->list); spin_unlock_irqrestore (&dev->lock, flags); if (rx_submit (dev, req, gfp_flags) < 0) { defer_kevent (dev, WORK_RX_MEMORY); return; } spin_lock_irqsave (&dev->lock, flags); } spin_unlock_irqrestore (&dev->lock, flags); } static void eth_work (void *_dev) { struct eth_dev *dev = _dev; if (test_bit (WORK_RX_MEMORY, &dev->todo)) { if (netif_running (dev->net)) rx_fill (dev, GFP_KERNEL); else clear_bit (WORK_RX_MEMORY, &dev->todo); } if (dev->todo) DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo); } static void tx_complete (struct usb_ep *ep, struct usb_request *req) { struct sk_buff *skb = req->context; struct eth_dev *dev = ep->driver_data; switch (req->status) { default: dev->stats.tx_errors++; VDEBUG (dev, "tx err %d\n", req->status); /* FALLTHROUGH */ case -ECONNRESET: // unlink case -ESHUTDOWN: // disconnect etc break; case 0: dev->stats.tx_bytes += skb->len; } dev->stats.tx_packets++; spin_lock (&dev->lock); list_add (&req->list, &dev->tx_reqs); spin_unlock (&dev->lock); dev_kfree_skb_any (skb); atomic_dec (&dev->tx_qlen); if (netif_carrier_ok (dev->net)) netif_wake_queue (dev->net); } static int eth_start_xmit (struct sk_buff *skb, struct net_device *net) { struct eth_dev *dev = (struct eth_dev *) net->priv; int length = skb->len; int retval; struct usb_request *req = 0; unsigned long flags; spin_lock_irqsave (&dev->lock, flags); req = container_of (dev->tx_reqs.next, struct usb_request, list); list_del (&req->list); if (list_empty (&dev->tx_reqs)) netif_stop_queue (net); spin_unlock_irqrestore (&dev->lock, flags); /* no buffer copies needed, unless the network stack did it * or the hardware can't use skb buffers. * or there's not enough space for any RNDIS headers we need */ #ifdef CONFIG_USB_ETH_RNDIS if (dev->rndis) { struct sk_buff *skb_rndis; skb_rndis = skb_realloc_headroom (skb, sizeof (struct rndis_packet_msg_type)); if (!skb_rndis) goto drop; dev_kfree_skb_any (skb); skb = skb_rndis; rndis_add_hdr (skb); length = skb->len; } #endif req->buf = skb->data; req->context = skb; req->complete = tx_complete; /* use zlp framing on tx for strict CDC-Ether conformance, * though any robust network rx path ignores extra padding. * and some hardware doesn't like to write zlps. */ req->zero = 1; if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0) length++; req->length = length; #ifdef CONFIG_USB_GADGET_DUALSPEED /* throttle highspeed IRQ rate back slightly */ req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0) : 0; #endif retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC); switch (retval) { default: DEBUG (dev, "tx queue err %d\n", retval); break; case 0: net->trans_start = jiffies; atomic_inc (&dev->tx_qlen); } if (retval) { #ifdef CONFIG_USB_ETH_RNDIS drop: #endif dev->stats.tx_dropped++; dev_kfree_skb_any (skb); spin_lock_irqsave (&dev->lock, flags); if (list_empty (&dev->tx_reqs)) netif_start_queue (net); list_add (&req->list, &dev->tx_reqs); spin_unlock_irqrestore (&dev->lock, flags); } return 0; } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_USB_ETH_RNDIS static void rndis_send_media_state (struct eth_dev *dev, int connect) { if (!dev) return; if (connect) { if (rndis_signal_connect (dev->rndis_config)) return; } else { if (rndis_signal_disconnect (dev->rndis_config)) return; } } static int rndis_control_ack (struct net_device *net) { struct eth_dev *dev = (struct eth_dev *) net->priv; u32 length; struct usb_request *resp; /* in case RNDIS calls this after disconnect */ if (!dev->status_ep) { DEBUG (dev, "status ENODEV\n"); return -ENODEV; } /* Allocate memory for notification ie. ACK */ resp = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC); if (!resp) { DEBUG (dev, "status ENOMEM\n"); return -ENOMEM; } resp->buf = usb_ep_alloc_buffer (dev->status_ep, 8, &resp->dma, GFP_ATOMIC); if (!resp->buf) { DEBUG (dev, "status buf ENOMEM\n"); usb_ep_free_request (dev->status_ep, resp); return -ENOMEM; } /* Send RNDIS RESPONSE_AVAILABLE notification; * CDC_NOTIFY_RESPONSE_AVAILABLE should work too */ resp->length = 8; resp->complete = rndis_response_complete; *((u32 *) resp->buf) = __constant_cpu_to_le32 (1); *((u32 *) resp->buf + 1) = __constant_cpu_to_le32 (0); length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC); if (length < 0) { resp->status = 0; rndis_response_complete (dev->status_ep, resp); } return 0; } #endif /* RNDIS */ static void eth_start (struct eth_dev *dev, int gfp_flags) { DEBUG (dev, "%s\n", __FUNCTION__); /* fill the rx queue */ rx_fill (dev, gfp_flags); /* and open the tx floodgates */ atomic_set (&dev->tx_qlen, 0); netif_wake_queue (dev->net); #ifdef CONFIG_USB_ETH_RNDIS if (dev->rndis) { rndis_set_param_medium (dev->rndis_config, NDIS_MEDIUM_802_3, BITRATE(dev->gadget)); rndis_send_media_state (dev, 1); } #endif } static int eth_open (struct net_device *net) { struct eth_dev *dev = (struct eth_dev *) net->priv; DEBUG (dev, "%s\n", __FUNCTION__); if (netif_carrier_ok (dev->net)) eth_start (dev, GFP_KERNEL); return 0; } static int eth_stop (struct net_device *net) { struct eth_dev *dev = (struct eth_dev *) net->priv; VDEBUG (dev, "%s\n", __FUNCTION__); netif_stop_queue (net); DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n", dev->stats.rx_packets, dev->stats.tx_packets, dev->stats.rx_errors, dev->stats.tx_errors ); /* ensure there are no more active requests */ if (dev->gadget->speed != USB_SPEED_UNKNOWN) { usb_ep_disable (dev->in_ep); usb_ep_disable (dev->out_ep); if (netif_carrier_ok (dev->net)) { DEBUG (dev, "host still using in/out endpoints\n"); // FIXME idiom may leave toggle wrong here usb_ep_enable (dev->in_ep, dev->in); usb_ep_enable (dev->out_ep, dev->out); } if (dev->status_ep) { usb_ep_disable (dev->status_ep); usb_ep_enable (dev->status_ep, dev->status); } } #ifdef CONFIG_USB_ETH_RNDIS if (dev->rndis) { rndis_set_param_medium (dev->rndis_config, NDIS_MEDIUM_802_3, 0); rndis_send_media_state (dev, 0); } #endif return 0; } /*-------------------------------------------------------------------------*/ static void eth_unbind (struct usb_gadget *gadget) { struct eth_dev *dev = get_gadget_data (gadget); DEBUG (dev, "unbind\n"); #ifdef CONFIG_USB_ETH_RNDIS rndis_deregister (dev->rndis_config); rndis_exit (); #endif /* we've already been disconnected ... no i/o is active */ if (dev->req) { usb_ep_free_buffer (gadget->ep0, dev->req->buf, dev->req->dma, USB_BUFSIZ); usb_ep_free_request (gadget->ep0, dev->req); dev->req = 0; } unregister_netdev (dev->net); free_netdev(dev->net); /* assuming we used keventd, it must quiesce too */ flush_scheduled_work (); set_gadget_data (gadget, 0); } static int __init eth_bind (struct usb_gadget *gadget) { struct eth_dev *dev; struct net_device *net; u8 cdc = 1, zlp = 1, rndis = 1; struct usb_ep *ep; int status = -ENOMEM; /* these flags are only ever cleared; compiler take note */ #ifndef DEV_CONFIG_CDC cdc = 0; #endif #ifndef CONFIG_USB_ETH_RNDIS rndis = 0; #endif /* Because most host side USB stacks handle CDC Ethernet, that * standard protocol is _strongly_ preferred for interop purposes. * (By everyone except Microsoft.) */ if (gadget_is_net2280 (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201); } else if (gadget_is_dummy (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202); } else if (gadget_is_pxa (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203); /* pxa doesn't support altsettings */ cdc = 0; } else if (gadget_is_sh(gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204); /* sh doesn't support multiple interfaces or configs */ cdc = 0; rndis = 0; } else if (gadget_is_sa1100 (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205); /* hardware can't write zlps */ zlp = 0; /* sa1100 CAN do CDC, without status endpoint ... we use * non-CDC to be compatible with ARM Linux-2.4 "usb-eth". */ cdc = 0; } else if (gadget_is_goku (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206); } else if (gadget_is_mq11xx (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207); } else if (gadget_is_omap (gadget)) { device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208); } else { /* can't assume CDC works. don't want to default to * anything less functional on CDC-capable hardware, * so we fail in this case. */ dev_err (&gadget->dev, "controller '%s' not recognized\n", gadget->name); return -ENODEV; } snprintf (manufacturer, sizeof manufacturer, UTS_SYSNAME " " UTS_RELEASE "/%s", gadget->name); /* CDC subset ... recognized by Linux since 2.4.10, but Windows * drivers aren't widely available. */ if (!cdc) { device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC; device_desc.idVendor = __constant_cpu_to_le16(SIMPLE_VENDOR_NUM); device_desc.idProduct = __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM); } /* If there's an RNDIS configuration, that's what Windows wants to * be using ... so use these product IDs here and in the "linux.inf" * needed to install MSFT drivers. Current Linux kernels will use * the second configuration if it's CDC Ethernet, and need some help * to choose the right configuration otherwise. */ if (rndis) { device_desc.idVendor = __constant_cpu_to_le16(RNDIS_VENDOR_NUM); device_desc.idProduct = __constant_cpu_to_le16(RNDIS_PRODUCT_NUM); snprintf (product_desc, sizeof product_desc, "RNDIS/%s", driver_desc); } /* support optional vendor/distro customization */ if (idVendor) { if (!idProduct) { dev_err (&gadget->dev, "idVendor needs idProduct!\n"); return -ENODEV; } device_desc.idVendor = cpu_to_le16(idVendor); device_desc.idProduct = cpu_to_le16(idProduct); if (bcdDevice) device_desc.bcdDevice = cpu_to_le16(bcdDevice); } if (iManufacturer) strlcpy (manufacturer, iManufacturer, sizeof manufacturer); if (iProduct) strlcpy (product_desc, iProduct, sizeof product_desc); /* all we really need is bulk IN/OUT */ usb_ep_autoconfig_reset (gadget); ep = usb_ep_autoconfig (gadget, &fs_source_desc); if (!ep) { autoconf_fail: dev_err (&gadget->dev, "can't autoconfigure on %s\n", gadget->name); return -ENODEV; } EP_IN_NAME = ep->name; ep->driver_data = ep; /* claim */ ep = usb_ep_autoconfig (gadget, &fs_sink_desc); if (!ep) goto autoconf_fail; EP_OUT_NAME = ep->name; ep->driver_data = ep; /* claim */ /* CDC Ethernet control interface doesn't require a status endpoint. * Since some hosts expect one, try to allocate one anyway. */ if (cdc || rndis) { ep = usb_ep_autoconfig (gadget, &fs_status_desc); if (ep) { EP_STATUS_NAME = ep->name; ep->driver_data = ep; /* claim */ } else if (rndis) { dev_err (&gadget->dev, "can't run RNDIS on %s\n", gadget->name); return -ENODEV; #ifdef DEV_CONFIG_CDC } 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; fs_subset_descriptors(); hs_subset_descriptors(); } /* For now RNDIS is always a second config */ if (rndis) device_desc.bNumConfigurations = 2; #ifdef CONFIG_USB_GADGET_DUALSPEED if (rndis) dev_qualifier.bNumConfigurations = 2; else if (!cdc) dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC; /* assumes ep0 uses the same value for both speeds ... */ dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; /* and that all endpoints are dual-speed */ hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress; hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress; #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) if (EP_STATUS_NAME) hs_status_desc.bEndpointAddress = fs_status_desc.bEndpointAddress; #endif #endif /* DUALSPEED */ device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; usb_gadget_set_selfpowered (gadget); net = alloc_etherdev (sizeof *dev); if (!net) return status; dev = net->priv; spin_lock_init (&dev->lock); INIT_WORK (&dev->work, eth_work, dev); INIT_LIST_HEAD (&dev->tx_reqs); INIT_LIST_HEAD (&dev->rx_reqs); /* network device setup */ dev->net = net; SET_MODULE_OWNER (net); strcpy (net->name, "usb%d"); dev->cdc = cdc; dev->zlp = zlp; /* FIXME make these addresses configurable with module params. * also the manufacturer and product strings. */ /* one random address for the gadget device ... both of these could * reasonably come from an id prom or a module parameter. */ random_ether_addr(net->dev_addr); /* ... another address for the host, on the other end of the * link, gets exported through CDC (see CDC spec table 41) * and RNDIS. */ if (cdc || rndis) { random_ether_addr(dev->host_mac); #ifdef DEV_CONFIG_CDC snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X", dev->host_mac [0], dev->host_mac [1], dev->host_mac [2], dev->host_mac [3], dev->host_mac [4], dev->host_mac [5]); #endif } if (rndis) { status = rndis_init(); if (status < 0) { dev_err (&gadget->dev, "can't init RNDIS, %d\n", status); goto fail; } } net->change_mtu = eth_change_mtu; net->get_stats = eth_get_stats; net->hard_start_xmit = eth_start_xmit; net->open = eth_open; net->stop = eth_stop; // watchdog_timeo, tx_timeout ... // set_multicast_list net->do_ioctl = eth_ioctl; /* preallocate control response and buffer */ dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL); if (!dev->req) goto fail; dev->req->complete = eth_setup_complete; dev->req->buf = usb_ep_alloc_buffer (gadget->ep0, USB_BUFSIZ, &dev->req->dma, GFP_KERNEL); if (!dev->req->buf) { usb_ep_free_request (gadget->ep0, dev->req); goto fail; } /* finish hookup to lower layer ... */ dev->gadget = gadget; set_gadget_data (gadget, dev); gadget->ep0->driver_data = dev; /* two kinds of host-initiated state changes: * - iff DATA transfer is active, carrier is "on" * - tx queueing enabled if open *and* carrier is "on" */ netif_stop_queue (dev->net); netif_carrier_off (dev->net); // SET_NETDEV_DEV (dev->net, &gadget->dev); status = register_netdev (dev->net); if (status < 0) goto fail1; INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name, EP_OUT_NAME, EP_IN_NAME, EP_STATUS_NAME ? " STATUS " : "", EP_STATUS_NAME ? EP_STATUS_NAME : "" ); INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n", net->dev_addr [0], net->dev_addr [1], net->dev_addr [2], net->dev_addr [3], net->dev_addr [4], net->dev_addr [5]); if (cdc || rndis) INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n", dev->host_mac [0], dev->host_mac [1], dev->host_mac [2], dev->host_mac [3], dev->host_mac [4], dev->host_mac [5]); #ifdef CONFIG_USB_ETH_RNDIS if (rndis) { u32 vendorID = 0; /* FIXME RNDIS vendor id == "vendor NIC code" == ? */ dev->rndis_config = rndis_register (rndis_control_ack); if (dev->rndis_config < 0) { fail0: unregister_netdev (dev->net); status = -ENODEV; goto fail; } /* these set up a lot of the OIDs that RNDIS needs */ rndis_set_host_mac (dev->rndis_config, dev->host_mac); if (rndis_set_param_dev (dev->rndis_config, dev->net, &dev->stats)) goto fail0; if (rndis_set_param_vendor (dev->rndis_config, vendorID, manufacturer)) goto fail0; if (rndis_set_param_medium (dev->rndis_config, NDIS_MEDIUM_802_3, 0)) goto fail0; INFO (dev, "RNDIS ready\n"); } #endif return status; fail1: dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status); fail: eth_unbind (gadget); return status; } /*-------------------------------------------------------------------------*/ static struct usb_gadget_driver eth_driver = { #ifdef CONFIG_USB_GADGET_DUALSPEED .speed = USB_SPEED_HIGH, #else .speed = USB_SPEED_FULL, #endif .function = (char *) driver_desc, .bind = eth_bind, .unbind = eth_unbind, .setup = eth_setup, .disconnect = eth_disconnect, .driver = { .name = (char *) shortname, // .shutdown = ... // .suspend = ... // .resume = ... }, }; MODULE_DESCRIPTION (DRIVER_DESC); MODULE_AUTHOR ("David Brownell, Benedikt Spanger"); MODULE_LICENSE ("GPL"); static int __init init (void) { return usb_gadget_register_driver (ð_driver); } module_init (init); static void __exit cleanup (void) { usb_gadget_unregister_driver (ð_driver); } module_exit (cleanup);