From 9dd014eb9804f19d6230c3cbc10fa25f5416bda7 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Fri, 17 Apr 2009 01:40:19 -0700 Subject: pegasus: Handle disconnect error code correctly. EPERM means that disconnect() is runnung. It should be treated like ENODEV Signed-off-by: Oliver Neukum Signed-off-by: David S. Miller --- drivers/net/usb/pegasus.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/usb') diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c index a8228d87c8cf..2138535f2339 100644 --- a/drivers/net/usb/pegasus.c +++ b/drivers/net/usb/pegasus.c @@ -899,6 +899,7 @@ static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net) /* cleanup should already have been scheduled */ break; case -ENODEV: /* disconnect() upcoming */ + case -EPERM: netif_device_detach(pegasus->net); break; default: -- cgit From f293501c61c50b014ad2347661c6acd951c80fed Mon Sep 17 00:00:00 2001 From: Steve Glendinning Date: Fri, 1 May 2009 05:46:51 +0000 Subject: smsc95xx: configure LED outputs SMSC LAN9500 has dual purpose GPIO/LED pins, and by default at power-on these are configured as GPIOs. This means that if LEDs are fitted they won't ever light. This patch sets them to be LED outputs for speed, duplex and link/activity. Signed-off-by: Steve Glendinning Signed-off-by: David S. Miller --- drivers/net/usb/smsc95xx.c | 10 ++++++++++ drivers/net/usb/smsc95xx.h | 3 +++ 2 files changed, 13 insertions(+) (limited to 'drivers/net/usb') diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index dc1665326592..0fd68a5f9d49 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -941,6 +941,16 @@ static int smsc95xx_reset(struct usbnet *dev) if (netif_msg_ifup(dev)) devdbg(dev, "ID_REV = 0x%08x", read_buf); + /* Configure GPIO pins as LED outputs */ + write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | + LED_GPIO_CFG_FDX_LED; + ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write LED_GPIO_CFG register, ret=%d", + ret); + return ret; + } + /* Init Tx */ write_buf = 0; ret = smsc95xx_write_reg(dev, FLOW, write_buf); diff --git a/drivers/net/usb/smsc95xx.h b/drivers/net/usb/smsc95xx.h index 66b5c84f302e..86bc44977fbd 100644 --- a/drivers/net/usb/smsc95xx.h +++ b/drivers/net/usb/smsc95xx.h @@ -99,6 +99,9 @@ #define PM_CTL_WUPS_MULTI_ (0x00000003) #define LED_GPIO_CFG (0x24) +#define LED_GPIO_CFG_SPD_LED (0x01000000) +#define LED_GPIO_CFG_LNK_LED (0x00100000) +#define LED_GPIO_CFG_FDX_LED (0x00010000) #define GPIO_CFG (0x28) -- cgit From 726474b8cd0f0f49c570b1dbbab44be898797550 Mon Sep 17 00:00:00 2001 From: Steve Glendinning Date: Fri, 1 May 2009 06:07:22 +0000 Subject: smsc95xx: add support for LAN9512 and LAN9514 LAN9512 and LAN9514 are USB hubs with an integrated 10/100 ethernet controller. Logically this looks like an ethernet controller (similar to LAN9500) permanently attached to one of the hub's downstream ports. This patch adds the usb device id of the new ethernet controller to the smsc95xx driver. This id is the same in both new devices. Signed-off-by: Steve Glendinning Signed-off-by: David S. Miller --- drivers/net/usb/smsc95xx.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/net/usb') diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 0fd68a5f9d49..5a7283372b53 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1241,6 +1241,11 @@ static const struct usb_device_id products[] = { USB_DEVICE(0x0424, 0x9500), .driver_info = (unsigned long) &smsc95xx_info, }, + { + /* SMSC9512/9514 USB Hub & Ethernet Device */ + USB_DEVICE(0x0424, 0xec00), + .driver_info = (unsigned long) &smsc95xx_info, + }, { }, /* END */ }; MODULE_DEVICE_TABLE(usb, products); -- cgit From 9f722c0978b04acba209f8ca1896ad05814bc3a3 Mon Sep 17 00:00:00 2001 From: Omar Laazimani Date: Mon, 4 May 2009 12:01:43 -0700 Subject: usbnet: CDC EEM support (v5) This introduces a CDC Ethernet Emulation Model (EEM) host side driver to support USB EEM devices. EEM is different from the Ethernet Control Model (ECM) currently supported by the "CDC Ethernet" driver. One key difference is that it doesn't require of USB interface alternate settings to manage interface state; some maldesigned hardware can't handle that part of USB. It also avoids a separate USB interface for control and status updates. [ dbrownell@users.sourceforge.net: fix skb leaks, add rx packet checks, improve fault handling, EEM conformance updates, cleanup ] Signed-off-by: Omar Laazimani Signed-off-by: David Brownell Signed-off-by: David S. Miller --- drivers/net/usb/Kconfig | 14 ++ drivers/net/usb/Makefile | 1 + drivers/net/usb/cdc_eem.c | 381 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 396 insertions(+) create mode 100644 drivers/net/usb/cdc_eem.c (limited to 'drivers/net/usb') diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig index 8ee21030e9ac..dfc6cf765fbd 100644 --- a/drivers/net/usb/Kconfig +++ b/drivers/net/usb/Kconfig @@ -180,6 +180,20 @@ config USB_NET_CDCETHER IEEE 802 "local assignment" bit is set in the address, a "usbX" name is used instead. +config USB_NET_CDC_EEM + tristate "CDC EEM support" + depends on USB_USBNET && EXPERIMENTAL + help + This option supports devices conforming to the Communication Device + Class (CDC) Ethernet Emulation Model, a specification that's easy to + implement in device firmware. The CDC EEM specifications are available + from . + + This driver creates an interface named "ethX", where X depends on + what other networking devices you have in use. However, if the + IEEE 802 "local assignment" bit is set in the address, a "usbX" + name is used instead. + config USB_NET_DM9601 tristate "Davicom DM9601 based USB 1.1 10/100 ethernet devices" depends on USB_USBNET diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile index 88a87eeb376a..c8aef62cf2b7 100644 --- a/drivers/net/usb/Makefile +++ b/drivers/net/usb/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_USB_RTL8150) += rtl8150.o obj-$(CONFIG_USB_HSO) += hso.o obj-$(CONFIG_USB_NET_AX8817X) += asix.o obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o +obj-$(CONFIG_USB_NET_CDC_EEM) += cdc_eem.o obj-$(CONFIG_USB_NET_DM9601) += dm9601.o obj-$(CONFIG_USB_NET_SMSC95XX) += smsc95xx.o obj-$(CONFIG_USB_NET_GL620A) += gl620a.o diff --git a/drivers/net/usb/cdc_eem.c b/drivers/net/usb/cdc_eem.c new file mode 100644 index 000000000000..80e01778dd3b --- /dev/null +++ b/drivers/net/usb/cdc_eem.c @@ -0,0 +1,381 @@ +/* + * USB CDC EEM network interface driver + * Copyright (C) 2009 Oberthur Technologies + * by Omar Laazimani, Olivier Condemine + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +/* + * This driver is an implementation of the CDC "Ethernet Emulation + * Model" (EEM) specification, which encapsulates Ethernet frames + * for transport over USB using a simpler USB device model than the + * previous CDC "Ethernet Control Model" (ECM, or "CDC Ethernet"). + * + * For details, see www.usb.org/developers/devclass_docs/CDC_EEM10.pdf + * + * This version has been tested with GIGAntIC WuaoW SIM Smart Card on 2.6.24, + * 2.6.27 and 2.6.30rc2 kernel. + * It has also been validated on Openmoko Om 2008.12 (based on 2.6.24 kernel). + * build on 23-April-2009 + */ + +#define EEM_HEAD 2 /* 2 byte header */ + +/*-------------------------------------------------------------------------*/ + +static void eem_linkcmd_complete(struct urb *urb) +{ + dev_kfree_skb(urb->context); + usb_free_urb(urb); +} + +static void eem_linkcmd(struct usbnet *dev, struct sk_buff *skb) +{ + struct urb *urb; + int status; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) + goto fail; + + usb_fill_bulk_urb(urb, dev->udev, dev->out, + skb->data, skb->len, eem_linkcmd_complete, skb); + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status) { + usb_free_urb(urb); +fail: + dev_kfree_skb(skb); + devwarn(dev, "link cmd failure\n"); + return; + } +} + +static int eem_bind(struct usbnet *dev, struct usb_interface *intf) +{ + int status = 0; + + status = usbnet_get_endpoints(dev, intf); + if (status < 0) { + usb_set_intfdata(intf, NULL); + usb_driver_release_interface(driver_of(intf), intf); + return status; + } + + /* no jumbogram (16K) support for now */ + + dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN; + + return 0; +} + +/* + * EEM permits packing multiple Ethernet frames into USB transfers + * (a "bundle"), but for TX we don't try to do that. + */ +static struct sk_buff *eem_tx_fixup(struct usbnet *dev, struct sk_buff *skb, + gfp_t flags) +{ + struct sk_buff *skb2 = NULL; + u16 len = skb->len; + u32 crc = 0; + int padlen = 0; + + /* When ((len + EEM_HEAD + ETH_FCS_LEN) % dev->maxpacket) is + * zero, stick two bytes of zero length EEM packet on the end. + * Else the framework would add invalid single byte padding, + * since it can't know whether ZLPs will be handled right by + * all the relevant hardware and software. + */ + if (!((len + EEM_HEAD + ETH_FCS_LEN) % dev->maxpacket)) + padlen += 2; + + if (!skb_cloned(skb)) { + int headroom = skb_headroom(skb); + int tailroom = skb_tailroom(skb); + + if ((tailroom >= ETH_FCS_LEN + padlen) + && (headroom >= EEM_HEAD)) + goto done; + + if ((headroom + tailroom) + > (EEM_HEAD + ETH_FCS_LEN + padlen)) { + skb->data = memmove(skb->head + + EEM_HEAD, + skb->data, + skb->len); + skb_set_tail_pointer(skb, len); + goto done; + } + } + + skb2 = skb_copy_expand(skb, EEM_HEAD, ETH_FCS_LEN + padlen, flags); + if (!skb2) + return NULL; + + dev_kfree_skb_any(skb); + skb = skb2; + +done: + /* we don't use the "no Ethernet CRC" option */ + crc = crc32_le(~0, skb->data, skb->len); + crc = ~crc; + + put_unaligned_le32(crc, skb_put(skb, 4)); + + /* EEM packet header format: + * b0..13: length of ethernet frame + * b14: bmCRC (1 == valid Ethernet CRC) + * b15: bmType (0 == data) + */ + len = skb->len; + put_unaligned_le16(BIT(14) | len, skb_push(skb, 2)); + + /* Bundle a zero length EEM packet if needed */ + if (padlen) + put_unaligned_le16(0, skb_put(skb, 2)); + + return skb; +} + +static int eem_rx_fixup(struct usbnet *dev, struct sk_buff *skb) +{ + /* + * Our task here is to strip off framing, leaving skb with one + * data frame for the usbnet framework code to process. But we + * may have received multiple EEM payloads, or command payloads. + * So we must process _everything_ as if it's a header, except + * maybe the last data payload + * + * REVISIT the framework needs updating so that when we consume + * all payloads (the last or only message was a command, or a + * zero length EEM packet) that is not accounted as an rx_error. + */ + do { + struct sk_buff *skb2 = NULL; + u16 header; + u16 len = 0; + + /* incomplete EEM header? */ + if (skb->len < EEM_HEAD) + return 0; + + /* + * EEM packet header format: + * b0..14: EEM type dependant (Data or Command) + * b15: bmType + */ + header = get_unaligned_le16(skb->data); + skb_pull(skb, EEM_HEAD); + + /* + * The bmType bit helps to denote when EEM + * packet is data or command : + * bmType = 0 : EEM data payload + * bmType = 1 : EEM (link) command + */ + if (header & BIT(15)) { + u16 bmEEMCmd; + + /* + * EEM (link) command packet: + * b0..10: bmEEMCmdParam + * b11..13: bmEEMCmd + * b14: bmReserved (must be 0) + * b15: 1 (EEM command) + */ + if (header & BIT(14)) { + devdbg(dev, "reserved command %04x\n", header); + continue; + } + + bmEEMCmd = (header >> 11) & 0x7; + switch (bmEEMCmd) { + + /* Responding to echo requests is mandatory. */ + case 0: /* Echo command */ + len = header & 0x7FF; + + /* bogus command? */ + if (skb->len < len) + return 0; + + skb2 = skb_clone(skb, GFP_ATOMIC); + if (unlikely(!skb2)) + goto next; + skb_trim(skb2, len); + put_unaligned_le16(BIT(15) | (1 << 11) | len, + skb_push(skb2, 2)); + eem_linkcmd(dev, skb2); + break; + + /* + * Host may choose to ignore hints. + * - suspend: peripheral ready to suspend + * - response: suggest N millisec polling + * - response complete: suggest N sec polling + */ + case 2: /* Suspend hint */ + case 3: /* Response hint */ + case 4: /* Response complete hint */ + continue; + + /* + * Hosts should never receive host-to-peripheral + * or reserved command codes; or responses to an + * echo command we didn't send. + */ + case 1: /* Echo response */ + case 5: /* Tickle */ + default: /* reserved */ + devwarn(dev, "unexpected link command %d\n", + bmEEMCmd); + continue; + } + + } else { + u32 crc, crc2; + int is_last; + + /* zero length EEM packet? */ + if (header == 0) + continue; + + /* + * EEM data packet header : + * b0..13: length of ethernet frame + * b14: bmCRC + * b15: 0 (EEM data) + */ + len = header & 0x3FFF; + + /* bogus EEM payload? */ + if (skb->len < len) + return 0; + + /* bogus ethernet frame? */ + if (len < (ETH_HLEN + ETH_FCS_LEN)) + goto next; + + /* + * Treat the last payload differently: framework + * code expects our "fixup" to have stripped off + * headers, so "skb" is a data packet (or error). + * Else if it's not the last payload, keep "skb" + * for further processing. + */ + is_last = (len == skb->len); + if (is_last) + skb2 = skb; + else { + skb2 = skb_clone(skb, GFP_ATOMIC); + if (unlikely(!skb2)) + return 0; + } + + crc = get_unaligned_le32(skb2->data + + len - ETH_FCS_LEN); + skb_trim(skb2, len - ETH_FCS_LEN); + + /* + * The bmCRC helps to denote when the CRC field in + * the Ethernet frame contains a calculated CRC: + * bmCRC = 1 : CRC is calculated + * bmCRC = 0 : CRC = 0xDEADBEEF + */ + if (header & BIT(14)) + crc2 = ~crc32_le(~0, skb2->data, len); + else + crc2 = 0xdeadbeef; + + if (is_last) + return crc == crc2; + + if (unlikely(crc != crc2)) { + dev->stats.rx_errors++; + dev_kfree_skb_any(skb2); + } else + usbnet_skb_return(dev, skb2); + } + +next: + skb_pull(skb, len); + } while (skb->len); + + return 1; +} + +static const struct driver_info eem_info = { + .description = "CDC EEM Device", + .flags = FLAG_ETHER, + .bind = eem_bind, + .rx_fixup = eem_rx_fixup, + .tx_fixup = eem_tx_fixup, +}; + +/*-------------------------------------------------------------------------*/ + +static const struct usb_device_id products[] = { +{ + USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_EEM, + USB_CDC_PROTO_EEM), + .driver_info = (unsigned long) &eem_info, +}, +{ + /* EMPTY == end of list */ +}, +}; +MODULE_DEVICE_TABLE(usb, products); + +static struct usb_driver eem_driver = { + .name = "cdc_eem", + .id_table = products, + .probe = usbnet_probe, + .disconnect = usbnet_disconnect, + .suspend = usbnet_suspend, + .resume = usbnet_resume, +}; + + +static int __init eem_init(void) +{ + return usb_register(&eem_driver); +} +module_init(eem_init); + +static void __exit eem_exit(void) +{ + usb_deregister(&eem_driver); +} +module_exit(eem_exit); + +MODULE_AUTHOR("Omar Laazimani "); +MODULE_DESCRIPTION("USB CDC EEM"); +MODULE_LICENSE("GPL"); -- cgit