From 4324fd493430c0ab99dd7e89d50540b5e70f8098 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Wed, 31 Aug 2005 09:54:20 -0700 Subject: [PATCH] USB: usbnet (7/9) module for CDC Ethernet Makes the CDC Ethernet support live in a separate driver module. This module is a bit special since it exports utility functions that are reused by the the Zaurus and RNDIS drivers, but it's not "core" like usbnet itself. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/net/usbnet.c | 392 ----------------------------------------------- 1 file changed, 392 deletions(-) (limited to 'drivers/usb/net/usbnet.c') diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c index 75a05ab0a642..7703725327d2 100644 --- a/drivers/usb/net/usbnet.c +++ b/drivers/usb/net/usbnet.c @@ -300,377 +300,6 @@ void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) } EXPORT_SYMBOL_GPL(usbnet_skb_return); - -/*------------------------------------------------------------------------- - * - * Communications Device Class declarations. - * Used by CDC Ethernet, and some CDC variants - * - *-------------------------------------------------------------------------*/ - -#ifdef CONFIG_USB_CDCETHER -#define NEED_GENERIC_CDC -#endif - -#if defined(CONFIG_USB_ZAURUS) || defined(CONFIG_USB_ZAURUS_MODULE) -/* Ethernet variant uses funky framing, broken ethernet addressing */ -#define NEED_GENERIC_CDC -#endif - -#ifdef CONFIG_USB_RNDIS -/* ACM variant uses even funkier framing, complex control RPC scheme */ -#define NEED_GENERIC_CDC -#endif - - -#ifdef NEED_GENERIC_CDC - -#include - -static struct usb_driver usbnet_driver; - -/* - * probes control interface, claims data interface, collects the bulk - * endpoints, activates data interface (if needed), maybe sets MTU. - * all pure cdc, except for certain firmware workarounds. - */ -int usbnet_generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf) -{ - u8 *buf = intf->cur_altsetting->extra; - int len = intf->cur_altsetting->extralen; - struct usb_interface_descriptor *d; - struct cdc_state *info = (void *) &dev->data; - int status; - int rndis; - - if (sizeof dev->data < sizeof *info) - return -EDOM; - - /* expect strict spec conformance for the descriptors, but - * cope with firmware which stores them in the wrong place - */ - if (len == 0 && dev->udev->actconfig->extralen) { - /* Motorola SB4100 (and others: Brad Hards says it's - * from a Broadcom design) put CDC descriptors here - */ - buf = dev->udev->actconfig->extra; - len = dev->udev->actconfig->extralen; - if (len) - dev_dbg (&intf->dev, - "CDC descriptors on config\n"); - } - - /* this assumes that if there's a non-RNDIS vendor variant - * of cdc-acm, it'll fail RNDIS requests cleanly. - */ - rndis = (intf->cur_altsetting->desc.bInterfaceProtocol == 0xff); - - memset (info, 0, sizeof *info); - info->control = intf; - while (len > 3) { - if (buf [1] != USB_DT_CS_INTERFACE) - goto next_desc; - - /* use bDescriptorSubType to identify the CDC descriptors. - * We expect devices with CDC header and union descriptors. - * For CDC Ethernet we need the ethernet descriptor. - * For RNDIS, ignore two (pointless) CDC modem descriptors - * in favor of a complicated OID-based RPC scheme doing what - * CDC Ethernet achieves with a simple descriptor. - */ - switch (buf [2]) { - case USB_CDC_HEADER_TYPE: - if (info->header) { - dev_dbg (&intf->dev, "extra CDC header\n"); - goto bad_desc; - } - info->header = (void *) buf; - if (info->header->bLength != sizeof *info->header) { - dev_dbg (&intf->dev, "CDC header len %u\n", - info->header->bLength); - goto bad_desc; - } - break; - case USB_CDC_UNION_TYPE: - if (info->u) { - dev_dbg (&intf->dev, "extra CDC union\n"); - goto bad_desc; - } - info->u = (void *) buf; - if (info->u->bLength != sizeof *info->u) { - dev_dbg (&intf->dev, "CDC union len %u\n", - info->u->bLength); - goto bad_desc; - } - - /* we need a master/control interface (what we're - * probed with) and a slave/data interface; union - * descriptors sort this all out. - */ - info->control = usb_ifnum_to_if(dev->udev, - info->u->bMasterInterface0); - info->data = usb_ifnum_to_if(dev->udev, - info->u->bSlaveInterface0); - if (!info->control || !info->data) { - dev_dbg (&intf->dev, - "master #%u/%p slave #%u/%p\n", - info->u->bMasterInterface0, - info->control, - info->u->bSlaveInterface0, - info->data); - goto bad_desc; - } - if (info->control != intf) { - dev_dbg (&intf->dev, "bogus CDC Union\n"); - /* Ambit USB Cable Modem (and maybe others) - * interchanges master and slave interface. - */ - if (info->data == intf) { - info->data = info->control; - info->control = intf; - } else - goto bad_desc; - } - - /* a data interface altsetting does the real i/o */ - d = &info->data->cur_altsetting->desc; - if (d->bInterfaceClass != USB_CLASS_CDC_DATA) { - dev_dbg (&intf->dev, "slave class %u\n", - d->bInterfaceClass); - goto bad_desc; - } - break; - case USB_CDC_ETHERNET_TYPE: - if (info->ether) { - dev_dbg (&intf->dev, "extra CDC ether\n"); - goto bad_desc; - } - info->ether = (void *) buf; - if (info->ether->bLength != sizeof *info->ether) { - dev_dbg (&intf->dev, "CDC ether len %u\n", - info->ether->bLength); - goto bad_desc; - } - dev->hard_mtu = le16_to_cpu( - info->ether->wMaxSegmentSize); - /* because of Zaurus, we may be ignoring the host - * side link address we were given. - */ - break; - } -next_desc: - len -= buf [0]; /* bLength */ - buf += buf [0]; - } - - if (!info->header || !info->u || (!rndis && !info->ether)) { - dev_dbg (&intf->dev, "missing cdc %s%s%sdescriptor\n", - info->header ? "" : "header ", - info->u ? "" : "union ", - info->ether ? "" : "ether "); - goto bad_desc; - } - - /* claim data interface and set it up ... with side effects. - * network traffic can't flow until an altsetting is enabled. - */ - status = usb_driver_claim_interface (&usbnet_driver, info->data, dev); - if (status < 0) - return status; - status = usbnet_get_endpoints (dev, info->data); - if (status < 0) { - /* ensure immediate exit from usbnet_disconnect */ - usb_set_intfdata(info->data, NULL); - usb_driver_release_interface (&usbnet_driver, info->data); - return status; - } - - /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */ - dev->status = NULL; - if (info->control->cur_altsetting->desc.bNumEndpoints == 1) { - struct usb_endpoint_descriptor *desc; - - dev->status = &info->control->cur_altsetting->endpoint [0]; - desc = &dev->status->desc; - if (desc->bmAttributes != USB_ENDPOINT_XFER_INT - || !(desc->bEndpointAddress & USB_DIR_IN) - || (le16_to_cpu(desc->wMaxPacketSize) - < sizeof (struct usb_cdc_notification)) - || !desc->bInterval) { - dev_dbg (&intf->dev, "bad notification endpoint\n"); - dev->status = NULL; - } - } - if (rndis && !dev->status) { - dev_dbg (&intf->dev, "missing RNDIS status endpoint\n"); - usb_set_intfdata(info->data, NULL); - usb_driver_release_interface (&usbnet_driver, info->data); - return -ENODEV; - } - return 0; - -bad_desc: - dev_info (&dev->udev->dev, "bad CDC descriptors\n"); - return -ENODEV; -} -EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind); - -void usbnet_cdc_unbind (struct usbnet *dev, struct usb_interface *intf) -{ - struct cdc_state *info = (void *) &dev->data; - - /* disconnect master --> disconnect slave */ - if (intf == info->control && info->data) { - /* ensure immediate exit from usbnet_disconnect */ - usb_set_intfdata(info->data, NULL); - usb_driver_release_interface (&usbnet_driver, info->data); - info->data = NULL; - } - - /* and vice versa (just in case) */ - else if (intf == info->data && info->control) { - /* ensure immediate exit from usbnet_disconnect */ - usb_set_intfdata(info->control, NULL); - usb_driver_release_interface (&usbnet_driver, info->control); - info->control = NULL; - } -} -EXPORT_SYMBOL_GPL(usbnet_cdc_unbind); - -#endif /* NEED_GENERIC_CDC */ - - -#ifdef CONFIG_USB_CDCETHER -#define HAVE_HARDWARE - -/*------------------------------------------------------------------------- - * - * Communications Device Class, Ethernet Control model - * - * Takes two interfaces. The DATA interface is inactive till an altsetting - * is selected. Configuration data includes class descriptors. - * - * This should interop with whatever the 2.4 "CDCEther.c" driver - * (by Brad Hards) talked with. - * - *-------------------------------------------------------------------------*/ - -#include - - -static void dumpspeed (struct usbnet *dev, __le32 *speeds) -{ - if (netif_msg_timer (dev)) - devinfo (dev, "link speeds: %u kbps up, %u kbps down", - __le32_to_cpu(speeds[0]) / 1000, - __le32_to_cpu(speeds[1]) / 1000); -} - -static void cdc_status (struct usbnet *dev, struct urb *urb) -{ - struct usb_cdc_notification *event; - - if (urb->actual_length < sizeof *event) - return; - - /* SPEED_CHANGE can get split into two 8-byte packets */ - if (test_and_clear_bit (EVENT_STS_SPLIT, &dev->flags)) { - dumpspeed (dev, (__le32 *) urb->transfer_buffer); - return; - } - - event = urb->transfer_buffer; - switch (event->bNotificationType) { - case USB_CDC_NOTIFY_NETWORK_CONNECTION: - if (netif_msg_timer (dev)) - devdbg (dev, "CDC: carrier %s", - event->wValue ? "on" : "off"); - if (event->wValue) - netif_carrier_on(dev->net); - else - netif_carrier_off(dev->net); - break; - case USB_CDC_NOTIFY_SPEED_CHANGE: /* tx/rx rates */ - if (netif_msg_timer (dev)) - devdbg (dev, "CDC: speed change (len %d)", - urb->actual_length); - if (urb->actual_length != (sizeof *event + 8)) - set_bit (EVENT_STS_SPLIT, &dev->flags); - else - dumpspeed (dev, (__le32 *) &event[1]); - break; - // case USB_CDC_NOTIFY_RESPONSE_AVAILABLE: /* RNDIS; or unsolicited */ - default: - deverr (dev, "CDC: unexpected notification %02x!", - event->bNotificationType); - break; - } -} - -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 inline int -get_ethernet_addr (struct usbnet *dev, struct usb_cdc_ether_desc *e) -{ - int tmp, i; - unsigned char buf [13]; - - tmp = usb_string (dev->udev, e->iMACAddress, buf, sizeof buf); - if (tmp != 12) { - dev_dbg (&dev->udev->dev, - "bad MAC string %d fetch, %d\n", e->iMACAddress, tmp); - if (tmp >= 0) - tmp = -EINVAL; - return tmp; - } - for (i = tmp = 0; i < 6; i++, tmp += 2) - dev->net->dev_addr [i] = - (nibble (buf [tmp]) << 4) + nibble (buf [tmp + 1]); - return 0; -} - -static int cdc_bind (struct usbnet *dev, struct usb_interface *intf) -{ - int status; - struct cdc_state *info = (void *) &dev->data; - - status = usbnet_generic_cdc_bind (dev, intf); - if (status < 0) - return status; - - status = get_ethernet_addr (dev, info->ether); - if (status < 0) { - usb_set_intfdata(info->data, NULL); - usb_driver_release_interface (&usbnet_driver, info->data); - return status; - } - - /* FIXME cdc-ether has some multicast code too, though it complains - * in routine cases. info->ether describes the multicast support. - */ - return 0; -} - -static const struct driver_info cdc_info = { - .description = "CDC Ethernet Device", - .flags = FLAG_ETHER, - // .check_connect = cdc_check_connect, - .bind = cdc_bind, - .unbind = usbnet_cdc_unbind, - .status = cdc_status, -}; - -#endif /* CONFIG_USB_CDCETHER */ - - #ifdef CONFIG_USB_PL2301 #define HAVE_HARDWARE @@ -1754,23 +1383,6 @@ static const struct usb_device_id products [] = { .driver_info = (unsigned long) &rndis_info, }, #endif - -#ifdef CONFIG_USB_CDCETHER -{ - /* CDC Ether uses two interfaces, not necessarily consecutive. - * We match the main interface, ignoring the optional device - * class so we could handle devices that aren't exclusively - * CDC ether. - * - * NOTE: this match must come AFTER entries working around - * bugs/quirks in a given product (like Zaurus, above). - */ - USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET, - USB_CDC_PROTO_NONE), - .driver_info = (unsigned long) &cdc_info, -}, -#endif - { }, // END }; MODULE_DEVICE_TABLE (usb, products); @@ -1792,10 +1404,6 @@ static int __init usbnet_init(void) // compiler should optimize these out BUG_ON (sizeof (((struct sk_buff *)0)->cb) < sizeof (struct skb_data)); -#ifdef CONFIG_USB_CDCETHER - BUG_ON ((sizeof (((struct usbnet *)0)->data) - < sizeof (struct cdc_state))); -#endif random_ether_addr(node_id); -- cgit v1.2.2