1296 lines
36 KiB
C
Executable file
1296 lines
36 KiB
C
Executable file
/****************************************************************
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*
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* kaweth.c - driver for KL5KUSB101 based USB->Ethernet
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*
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* (c) 2000 Interlan Communications
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* (c) 2000 Stephane Alnet
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* (C) 2001 Brad Hards
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* (C) 2002 Oliver Neukum
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*
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* Original author: The Zapman <zapman@interlan.net>
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* Inspired by, and much credit goes to Michael Rothwell
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* <rothwell@interlan.net> for the test equipment, help, and patience
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* Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
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* Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
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* for providing the firmware and driver resources.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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****************************************************************/
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/* TODO:
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* Develop test procedures for USB net interfaces
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* Run test procedures
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* Fix bugs from previous two steps
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* Snoop other OSs for any tricks we're not doing
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* Reduce arbitrary timeouts
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* Smart multicast support
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* Temporary MAC change support
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* Tunable SOFs parameter - ioctl()?
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* Ethernet stats collection
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* Code formatting improvements
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/usb.h>
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#include <linux/types.h>
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#include <linux/ethtool.h>
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#include <linux/dma-mapping.h>
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#include <linux/wait.h>
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#include <linux/firmware.h>
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#include <linux/uaccess.h>
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#include <asm/byteorder.h>
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#undef DEBUG
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#define KAWETH_MTU 1514
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#define KAWETH_BUF_SIZE 1664
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#define KAWETH_TX_TIMEOUT (5 * HZ)
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#define KAWETH_SCRATCH_SIZE 32
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#define KAWETH_FIRMWARE_BUF_SIZE 4096
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#define KAWETH_CONTROL_TIMEOUT (30000)
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#define KAWETH_STATUS_BROKEN 0x0000001
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#define KAWETH_STATUS_CLOSING 0x0000002
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#define KAWETH_STATUS_SUSPENDING 0x0000004
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#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
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#define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
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#define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
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#define KAWETH_PACKET_FILTER_DIRECTED 0x04
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#define KAWETH_PACKET_FILTER_BROADCAST 0x08
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#define KAWETH_PACKET_FILTER_MULTICAST 0x10
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/* Table 7 */
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#define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
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#define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
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#define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
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#define KAWETH_COMMAND_STATISTICS 0x03
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#define KAWETH_COMMAND_SET_TEMP_MAC 0x06
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#define KAWETH_COMMAND_GET_TEMP_MAC 0x07
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#define KAWETH_COMMAND_SET_URB_SIZE 0x08
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#define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
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#define KAWETH_COMMAND_SCAN 0xFF
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#define KAWETH_SOFS_TO_WAIT 0x05
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#define INTBUFFERSIZE 4
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#define STATE_OFFSET 0
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#define STATE_MASK 0x40
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#define STATE_SHIFT 5
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#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
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MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
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MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
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MODULE_LICENSE("GPL");
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MODULE_FIRMWARE("kaweth/new_code.bin");
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MODULE_FIRMWARE("kaweth/new_code_fix.bin");
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MODULE_FIRMWARE("kaweth/trigger_code.bin");
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MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
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static const char driver_name[] = "kaweth";
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static int kaweth_probe(
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struct usb_interface *intf,
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const struct usb_device_id *id /* from id_table */
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);
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static void kaweth_disconnect(struct usb_interface *intf);
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static int kaweth_internal_control_msg(struct usb_device *usb_dev,
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unsigned int pipe,
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struct usb_ctrlrequest *cmd, void *data,
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int len, int timeout);
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static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
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static int kaweth_resume(struct usb_interface *intf);
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/****************************************************************
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* usb_device_id
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****************************************************************/
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static const struct usb_device_id usb_klsi_table[] = {
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{ USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
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{ USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
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{ USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
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{ USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
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{ USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
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{ USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
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{ USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
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{ USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
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{ USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
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{ USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
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{ USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
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{ USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
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{ USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
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{ USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
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{ USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
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{ USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
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{ USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
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{ USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
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{ USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
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{ USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
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{ USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
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{ USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
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{ USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
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{ USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
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{ USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
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{ USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
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{ USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
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{ USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
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{ USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
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{ USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
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{ USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
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{ USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
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{ USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
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{ USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
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{ USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
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{} /* Null terminator */
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};
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MODULE_DEVICE_TABLE (usb, usb_klsi_table);
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/****************************************************************
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* kaweth_driver
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****************************************************************/
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static struct usb_driver kaweth_driver = {
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.name = driver_name,
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.probe = kaweth_probe,
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.disconnect = kaweth_disconnect,
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.suspend = kaweth_suspend,
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.resume = kaweth_resume,
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.id_table = usb_klsi_table,
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.supports_autosuspend = 1,
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.disable_hub_initiated_lpm = 1,
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};
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typedef __u8 eth_addr_t[6];
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/****************************************************************
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* usb_eth_dev
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****************************************************************/
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struct usb_eth_dev {
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char *name;
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__u16 vendor;
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__u16 device;
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void *pdata;
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};
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/****************************************************************
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* kaweth_ethernet_configuration
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* Refer Table 8
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****************************************************************/
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struct kaweth_ethernet_configuration
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{
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__u8 size;
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__u8 reserved1;
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__u8 reserved2;
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eth_addr_t hw_addr;
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__u32 statistics_mask;
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__le16 segment_size;
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__u16 max_multicast_filters;
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__u8 reserved3;
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} __packed;
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/****************************************************************
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* kaweth_device
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****************************************************************/
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struct kaweth_device
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{
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spinlock_t device_lock;
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__u32 status;
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int end;
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int suspend_lowmem_rx;
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int suspend_lowmem_ctrl;
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int linkstate;
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int opened;
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struct delayed_work lowmem_work;
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struct usb_device *dev;
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struct usb_interface *intf;
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struct net_device *net;
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wait_queue_head_t term_wait;
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struct urb *rx_urb;
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struct urb *tx_urb;
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struct urb *irq_urb;
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dma_addr_t intbufferhandle;
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__u8 *intbuffer;
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dma_addr_t rxbufferhandle;
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__u8 *rx_buf;
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struct sk_buff *tx_skb;
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__u8 *firmware_buf;
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__u8 scratch[KAWETH_SCRATCH_SIZE];
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__u16 packet_filter_bitmap;
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struct kaweth_ethernet_configuration configuration;
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};
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/****************************************************************
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* kaweth_control
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****************************************************************/
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static int kaweth_control(struct kaweth_device *kaweth,
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unsigned int pipe,
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__u8 request,
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__u8 requesttype,
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__u16 value,
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__u16 index,
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void *data,
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__u16 size,
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int timeout)
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{
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struct usb_ctrlrequest *dr;
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int retval;
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if(in_interrupt()) {
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netdev_dbg(kaweth->net, "in_interrupt()\n");
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return -EBUSY;
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}
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dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
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if (!dr)
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return -ENOMEM;
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dr->bRequestType = requesttype;
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dr->bRequest = request;
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dr->wValue = cpu_to_le16(value);
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dr->wIndex = cpu_to_le16(index);
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dr->wLength = cpu_to_le16(size);
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retval = kaweth_internal_control_msg(kaweth->dev,
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pipe,
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dr,
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data,
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size,
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timeout);
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kfree(dr);
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return retval;
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}
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/****************************************************************
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* kaweth_read_configuration
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****************************************************************/
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static int kaweth_read_configuration(struct kaweth_device *kaweth)
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{
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int retval;
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retval = kaweth_control(kaweth,
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usb_rcvctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_GET_ETHERNET_DESC,
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USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
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0,
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0,
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(void *)&kaweth->configuration,
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sizeof(kaweth->configuration),
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KAWETH_CONTROL_TIMEOUT);
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return retval;
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}
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/****************************************************************
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* kaweth_set_urb_size
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****************************************************************/
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static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
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{
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int retval;
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netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
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retval = kaweth_control(kaweth,
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usb_sndctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_SET_URB_SIZE,
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USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
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urb_size,
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0,
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(void *)&kaweth->scratch,
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0,
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KAWETH_CONTROL_TIMEOUT);
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return retval;
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}
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/****************************************************************
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* kaweth_set_sofs_wait
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****************************************************************/
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static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
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{
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int retval;
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netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
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retval = kaweth_control(kaweth,
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usb_sndctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_SET_SOFS_WAIT,
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USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
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sofs_wait,
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0,
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(void *)&kaweth->scratch,
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0,
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KAWETH_CONTROL_TIMEOUT);
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return retval;
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}
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/****************************************************************
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* kaweth_set_receive_filter
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****************************************************************/
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static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
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__u16 receive_filter)
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{
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int retval;
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netdev_dbg(kaweth->net, "Set receive filter to %d\n",
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(unsigned)receive_filter);
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retval = kaweth_control(kaweth,
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usb_sndctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_SET_PACKET_FILTER,
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USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
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receive_filter,
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0,
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(void *)&kaweth->scratch,
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0,
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KAWETH_CONTROL_TIMEOUT);
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return retval;
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}
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/****************************************************************
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* kaweth_download_firmware
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****************************************************************/
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static int kaweth_download_firmware(struct kaweth_device *kaweth,
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const char *fwname,
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__u8 interrupt,
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__u8 type)
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{
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const struct firmware *fw;
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int data_len;
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int ret;
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ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
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if (ret) {
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dev_err(&kaweth->intf->dev, "Firmware request failed\n");
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return ret;
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}
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if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
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dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
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fw->size);
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release_firmware(fw);
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return -ENOSPC;
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}
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data_len = fw->size;
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memcpy(kaweth->firmware_buf, fw->data, fw->size);
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release_firmware(fw);
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kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
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kaweth->firmware_buf[3] = data_len >> 8;
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kaweth->firmware_buf[4] = type;
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kaweth->firmware_buf[5] = interrupt;
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netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
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kaweth->firmware_buf[2]);
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netdev_dbg(kaweth->net,
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"Downloading firmware at %p to kaweth device at %p\n",
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kaweth->firmware_buf, kaweth);
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netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
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return kaweth_control(kaweth,
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usb_sndctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_SCAN,
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USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
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0,
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0,
|
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(void *)kaweth->firmware_buf,
|
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data_len,
|
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KAWETH_CONTROL_TIMEOUT);
|
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}
|
|
|
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/****************************************************************
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* kaweth_trigger_firmware
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****************************************************************/
|
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static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
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__u8 interrupt)
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{
|
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kaweth->firmware_buf[0] = 0xB6;
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kaweth->firmware_buf[1] = 0xC3;
|
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kaweth->firmware_buf[2] = 0x01;
|
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kaweth->firmware_buf[3] = 0x00;
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kaweth->firmware_buf[4] = 0x06;
|
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kaweth->firmware_buf[5] = interrupt;
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kaweth->firmware_buf[6] = 0x00;
|
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kaweth->firmware_buf[7] = 0x00;
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return kaweth_control(kaweth,
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usb_sndctrlpipe(kaweth->dev, 0),
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KAWETH_COMMAND_SCAN,
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USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
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0,
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0,
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(void *)kaweth->firmware_buf,
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8,
|
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KAWETH_CONTROL_TIMEOUT);
|
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}
|
|
|
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/****************************************************************
|
|
* kaweth_reset
|
|
****************************************************************/
|
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static int kaweth_reset(struct kaweth_device *kaweth)
|
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{
|
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int result;
|
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|
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result = usb_reset_configuration(kaweth->dev);
|
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mdelay(10);
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|
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netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
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|
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return result;
|
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}
|
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|
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static void kaweth_usb_receive(struct urb *);
|
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static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
|
|
|
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/****************************************************************
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|
int_callback
|
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*****************************************************************/
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|
|
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static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
|
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{
|
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int status;
|
|
|
|
status = usb_submit_urb (kaweth->irq_urb, mf);
|
|
if (unlikely(status == -ENOMEM)) {
|
|
kaweth->suspend_lowmem_ctrl = 1;
|
|
schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
|
|
} else {
|
|
kaweth->suspend_lowmem_ctrl = 0;
|
|
}
|
|
|
|
if (status)
|
|
dev_err(&kaweth->intf->dev,
|
|
"can't resubmit intr, %s-%s, status %d\n",
|
|
kaweth->dev->bus->bus_name,
|
|
kaweth->dev->devpath, status);
|
|
}
|
|
|
|
static void int_callback(struct urb *u)
|
|
{
|
|
struct kaweth_device *kaweth = u->context;
|
|
int act_state;
|
|
int status = u->status;
|
|
|
|
switch (status) {
|
|
case 0: /* success */
|
|
break;
|
|
case -ECONNRESET: /* unlink */
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
return;
|
|
/* -EPIPE: should clear the halt */
|
|
default: /* error */
|
|
goto resubmit;
|
|
}
|
|
|
|
/* we check the link state to report changes */
|
|
if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
|
|
if (act_state)
|
|
netif_carrier_on(kaweth->net);
|
|
else
|
|
netif_carrier_off(kaweth->net);
|
|
|
|
kaweth->linkstate = act_state;
|
|
}
|
|
resubmit:
|
|
kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
|
|
}
|
|
|
|
static void kaweth_resubmit_tl(struct work_struct *work)
|
|
{
|
|
struct kaweth_device *kaweth =
|
|
container_of(work, struct kaweth_device, lowmem_work.work);
|
|
|
|
if (IS_BLOCKED(kaweth->status))
|
|
return;
|
|
|
|
if (kaweth->suspend_lowmem_rx)
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
|
|
|
|
if (kaweth->suspend_lowmem_ctrl)
|
|
kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
* kaweth_resubmit_rx_urb
|
|
****************************************************************/
|
|
static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
|
|
gfp_t mem_flags)
|
|
{
|
|
int result;
|
|
|
|
usb_fill_bulk_urb(kaweth->rx_urb,
|
|
kaweth->dev,
|
|
usb_rcvbulkpipe(kaweth->dev, 1),
|
|
kaweth->rx_buf,
|
|
KAWETH_BUF_SIZE,
|
|
kaweth_usb_receive,
|
|
kaweth);
|
|
kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
|
|
|
|
if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
|
|
if (result == -ENOMEM) {
|
|
kaweth->suspend_lowmem_rx = 1;
|
|
schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
|
|
}
|
|
dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
|
|
result);
|
|
} else {
|
|
kaweth->suspend_lowmem_rx = 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
|
|
|
|
/****************************************************************
|
|
* kaweth_usb_receive
|
|
****************************************************************/
|
|
static void kaweth_usb_receive(struct urb *urb)
|
|
{
|
|
struct device *dev = &urb->dev->dev;
|
|
struct kaweth_device *kaweth = urb->context;
|
|
struct net_device *net = kaweth->net;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
int count = urb->actual_length;
|
|
int count2 = urb->transfer_buffer_length;
|
|
|
|
__u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
|
|
|
|
struct sk_buff *skb;
|
|
|
|
if (unlikely(status == -EPIPE)) {
|
|
net->stats.rx_errors++;
|
|
kaweth->end = 1;
|
|
wake_up(&kaweth->term_wait);
|
|
dev_dbg(dev, "Status was -EPIPE.\n");
|
|
return;
|
|
}
|
|
if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
|
|
/* we are killed - set a flag and wake the disconnect handler */
|
|
kaweth->end = 1;
|
|
wake_up(&kaweth->term_wait);
|
|
dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
|
|
return;
|
|
}
|
|
if (unlikely(status == -EPROTO || status == -ETIME ||
|
|
status == -EILSEQ)) {
|
|
net->stats.rx_errors++;
|
|
dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
|
|
return;
|
|
}
|
|
if (unlikely(status == -EOVERFLOW)) {
|
|
net->stats.rx_errors++;
|
|
dev_dbg(dev, "Status was -EOVERFLOW.\n");
|
|
}
|
|
spin_lock_irqsave(&kaweth->device_lock, flags);
|
|
if (IS_BLOCKED(kaweth->status)) {
|
|
spin_unlock_irqrestore(&kaweth->device_lock, flags);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&kaweth->device_lock, flags);
|
|
|
|
if(status && status != -EREMOTEIO && count != 1) {
|
|
dev_err(&kaweth->intf->dev,
|
|
"%s RX status: %d count: %d packet_len: %d\n",
|
|
net->name, status, count, (int)pkt_len);
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
|
|
return;
|
|
}
|
|
|
|
if(kaweth->net && (count > 2)) {
|
|
if(pkt_len > (count - 2)) {
|
|
dev_err(&kaweth->intf->dev,
|
|
"Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
|
|
pkt_len, count);
|
|
dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
|
|
pkt_len & 2047);
|
|
dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
|
|
return;
|
|
}
|
|
|
|
if(!(skb = dev_alloc_skb(pkt_len+2))) {
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
|
|
return;
|
|
}
|
|
|
|
skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
|
|
|
|
skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
|
|
|
|
skb_put(skb, pkt_len);
|
|
|
|
skb->protocol = eth_type_trans(skb, net);
|
|
|
|
netif_rx(skb);
|
|
|
|
net->stats.rx_packets++;
|
|
net->stats.rx_bytes += pkt_len;
|
|
}
|
|
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_open
|
|
****************************************************************/
|
|
static int kaweth_open(struct net_device *net)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(net);
|
|
int res;
|
|
|
|
res = usb_autopm_get_interface(kaweth->intf);
|
|
if (res) {
|
|
dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
|
|
return -EIO;
|
|
}
|
|
res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
|
|
if (res)
|
|
goto err_out;
|
|
|
|
usb_fill_int_urb(
|
|
kaweth->irq_urb,
|
|
kaweth->dev,
|
|
usb_rcvintpipe(kaweth->dev, 3),
|
|
kaweth->intbuffer,
|
|
INTBUFFERSIZE,
|
|
int_callback,
|
|
kaweth,
|
|
250); /* overriding the descriptor */
|
|
kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
|
|
kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
|
|
if (res) {
|
|
usb_kill_urb(kaweth->rx_urb);
|
|
goto err_out;
|
|
}
|
|
kaweth->opened = 1;
|
|
|
|
netif_start_queue(net);
|
|
|
|
kaweth_async_set_rx_mode(kaweth);
|
|
return 0;
|
|
|
|
err_out:
|
|
usb_autopm_put_interface(kaweth->intf);
|
|
return -EIO;
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_kill_urbs
|
|
****************************************************************/
|
|
static void kaweth_kill_urbs(struct kaweth_device *kaweth)
|
|
{
|
|
usb_kill_urb(kaweth->irq_urb);
|
|
usb_kill_urb(kaweth->rx_urb);
|
|
usb_kill_urb(kaweth->tx_urb);
|
|
|
|
cancel_delayed_work_sync(&kaweth->lowmem_work);
|
|
|
|
/* a scheduled work may have resubmitted,
|
|
we hit them again */
|
|
usb_kill_urb(kaweth->irq_urb);
|
|
usb_kill_urb(kaweth->rx_urb);
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_close
|
|
****************************************************************/
|
|
static int kaweth_close(struct net_device *net)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(net);
|
|
|
|
netif_stop_queue(net);
|
|
kaweth->opened = 0;
|
|
|
|
kaweth->status |= KAWETH_STATUS_CLOSING;
|
|
|
|
kaweth_kill_urbs(kaweth);
|
|
|
|
kaweth->status &= ~KAWETH_STATUS_CLOSING;
|
|
|
|
usb_autopm_put_interface(kaweth->intf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u32 kaweth_get_link(struct net_device *dev)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(dev);
|
|
|
|
return kaweth->linkstate;
|
|
}
|
|
|
|
static const struct ethtool_ops ops = {
|
|
.get_link = kaweth_get_link
|
|
};
|
|
|
|
/****************************************************************
|
|
* kaweth_usb_transmit_complete
|
|
****************************************************************/
|
|
static void kaweth_usb_transmit_complete(struct urb *urb)
|
|
{
|
|
struct kaweth_device *kaweth = urb->context;
|
|
struct sk_buff *skb = kaweth->tx_skb;
|
|
int status = urb->status;
|
|
|
|
if (unlikely(status != 0))
|
|
if (status != -ENOENT)
|
|
dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
|
|
kaweth->net->name, status);
|
|
|
|
netif_wake_queue(kaweth->net);
|
|
dev_kfree_skb_irq(skb);
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_start_xmit
|
|
****************************************************************/
|
|
static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
|
|
struct net_device *net)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(net);
|
|
__le16 *private_header;
|
|
|
|
int res;
|
|
|
|
spin_lock_irq(&kaweth->device_lock);
|
|
|
|
kaweth_async_set_rx_mode(kaweth);
|
|
netif_stop_queue(net);
|
|
if (IS_BLOCKED(kaweth->status)) {
|
|
goto skip;
|
|
}
|
|
|
|
/* We now decide whether we can put our special header into the sk_buff */
|
|
if (skb_cow_head(skb, 2)) {
|
|
net->stats.tx_errors++;
|
|
netif_start_queue(net);
|
|
spin_unlock_irq(&kaweth->device_lock);
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
private_header = __skb_push(skb, 2);
|
|
*private_header = cpu_to_le16(skb->len-2);
|
|
kaweth->tx_skb = skb;
|
|
|
|
usb_fill_bulk_urb(kaweth->tx_urb,
|
|
kaweth->dev,
|
|
usb_sndbulkpipe(kaweth->dev, 2),
|
|
private_header,
|
|
skb->len,
|
|
kaweth_usb_transmit_complete,
|
|
kaweth);
|
|
kaweth->end = 0;
|
|
|
|
if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
|
|
{
|
|
dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
|
|
skip:
|
|
net->stats.tx_errors++;
|
|
|
|
netif_start_queue(net);
|
|
dev_kfree_skb_irq(skb);
|
|
}
|
|
else
|
|
{
|
|
net->stats.tx_packets++;
|
|
net->stats.tx_bytes += skb->len;
|
|
}
|
|
|
|
spin_unlock_irq(&kaweth->device_lock);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_set_rx_mode
|
|
****************************************************************/
|
|
static void kaweth_set_rx_mode(struct net_device *net)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(net);
|
|
|
|
__u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
|
|
KAWETH_PACKET_FILTER_BROADCAST |
|
|
KAWETH_PACKET_FILTER_MULTICAST;
|
|
|
|
netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
|
|
|
|
netif_stop_queue(net);
|
|
|
|
if (net->flags & IFF_PROMISC) {
|
|
packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
|
|
}
|
|
else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
|
|
packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
|
|
}
|
|
|
|
kaweth->packet_filter_bitmap = packet_filter_bitmap;
|
|
netif_wake_queue(net);
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_async_set_rx_mode
|
|
****************************************************************/
|
|
static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
|
|
{
|
|
int result;
|
|
__u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
|
|
|
|
kaweth->packet_filter_bitmap = 0;
|
|
if (packet_filter_bitmap == 0)
|
|
return;
|
|
|
|
if (in_interrupt())
|
|
return;
|
|
|
|
result = kaweth_control(kaweth,
|
|
usb_sndctrlpipe(kaweth->dev, 0),
|
|
KAWETH_COMMAND_SET_PACKET_FILTER,
|
|
USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
|
|
packet_filter_bitmap,
|
|
0,
|
|
(void *)&kaweth->scratch,
|
|
0,
|
|
KAWETH_CONTROL_TIMEOUT);
|
|
|
|
if(result < 0) {
|
|
dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
|
|
result);
|
|
}
|
|
else {
|
|
netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
|
|
packet_filter_bitmap);
|
|
}
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_tx_timeout
|
|
****************************************************************/
|
|
static void kaweth_tx_timeout(struct net_device *net)
|
|
{
|
|
struct kaweth_device *kaweth = netdev_priv(net);
|
|
|
|
dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
|
|
net->stats.tx_errors++;
|
|
netif_trans_update(net);
|
|
|
|
usb_unlink_urb(kaweth->tx_urb);
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_suspend
|
|
****************************************************************/
|
|
static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
|
|
{
|
|
struct kaweth_device *kaweth = usb_get_intfdata(intf);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&kaweth->device_lock, flags);
|
|
kaweth->status |= KAWETH_STATUS_SUSPENDING;
|
|
spin_unlock_irqrestore(&kaweth->device_lock, flags);
|
|
|
|
kaweth_kill_urbs(kaweth);
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_resume
|
|
****************************************************************/
|
|
static int kaweth_resume(struct usb_interface *intf)
|
|
{
|
|
struct kaweth_device *kaweth = usb_get_intfdata(intf);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&kaweth->device_lock, flags);
|
|
kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
|
|
spin_unlock_irqrestore(&kaweth->device_lock, flags);
|
|
|
|
if (!kaweth->opened)
|
|
return 0;
|
|
kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
|
|
kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_probe
|
|
****************************************************************/
|
|
|
|
|
|
static const struct net_device_ops kaweth_netdev_ops = {
|
|
.ndo_open = kaweth_open,
|
|
.ndo_stop = kaweth_close,
|
|
.ndo_start_xmit = kaweth_start_xmit,
|
|
.ndo_tx_timeout = kaweth_tx_timeout,
|
|
.ndo_set_rx_mode = kaweth_set_rx_mode,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
static int kaweth_probe(
|
|
struct usb_interface *intf,
|
|
const struct usb_device_id *id /* from id_table */
|
|
)
|
|
{
|
|
struct device *dev = &intf->dev;
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct kaweth_device *kaweth;
|
|
struct net_device *netdev;
|
|
const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
|
|
int result = 0;
|
|
int rv = -EIO;
|
|
|
|
dev_dbg(dev,
|
|
"Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
|
|
udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
|
|
le16_to_cpu(udev->descriptor.idProduct),
|
|
le16_to_cpu(udev->descriptor.bcdDevice));
|
|
|
|
dev_dbg(dev, "Device at %p\n", udev);
|
|
|
|
dev_dbg(dev, "Descriptor length: %x type: %x\n",
|
|
(int)udev->descriptor.bLength,
|
|
(int)udev->descriptor.bDescriptorType);
|
|
|
|
netdev = alloc_etherdev(sizeof(*kaweth));
|
|
if (!netdev)
|
|
return -ENOMEM;
|
|
|
|
kaweth = netdev_priv(netdev);
|
|
kaweth->dev = udev;
|
|
kaweth->net = netdev;
|
|
kaweth->intf = intf;
|
|
|
|
spin_lock_init(&kaweth->device_lock);
|
|
init_waitqueue_head(&kaweth->term_wait);
|
|
|
|
dev_dbg(dev, "Resetting.\n");
|
|
|
|
kaweth_reset(kaweth);
|
|
|
|
/*
|
|
* If high byte of bcdDevice is nonzero, firmware is already
|
|
* downloaded. Don't try to do it again, or we'll hang the device.
|
|
*/
|
|
|
|
if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
|
|
dev_info(dev, "Firmware present in device.\n");
|
|
} else {
|
|
/* Download the firmware */
|
|
dev_info(dev, "Downloading firmware...\n");
|
|
kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
|
|
if (!kaweth->firmware_buf) {
|
|
rv = -ENOMEM;
|
|
goto err_free_netdev;
|
|
}
|
|
if ((result = kaweth_download_firmware(kaweth,
|
|
"kaweth/new_code.bin",
|
|
100,
|
|
2)) < 0) {
|
|
dev_err(dev, "Error downloading firmware (%d)\n",
|
|
result);
|
|
goto err_fw;
|
|
}
|
|
|
|
if ((result = kaweth_download_firmware(kaweth,
|
|
"kaweth/new_code_fix.bin",
|
|
100,
|
|
3)) < 0) {
|
|
dev_err(dev, "Error downloading firmware fix (%d)\n",
|
|
result);
|
|
goto err_fw;
|
|
}
|
|
|
|
if ((result = kaweth_download_firmware(kaweth,
|
|
"kaweth/trigger_code.bin",
|
|
126,
|
|
2)) < 0) {
|
|
dev_err(dev, "Error downloading trigger code (%d)\n",
|
|
result);
|
|
goto err_fw;
|
|
|
|
}
|
|
|
|
if ((result = kaweth_download_firmware(kaweth,
|
|
"kaweth/trigger_code_fix.bin",
|
|
126,
|
|
3)) < 0) {
|
|
dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
|
|
goto err_fw;
|
|
}
|
|
|
|
|
|
if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
|
|
dev_err(dev, "Error triggering firmware (%d)\n", result);
|
|
goto err_fw;
|
|
}
|
|
|
|
/* Device will now disappear for a moment... */
|
|
dev_info(dev, "Firmware loaded. I'll be back...\n");
|
|
err_fw:
|
|
free_page((unsigned long)kaweth->firmware_buf);
|
|
free_netdev(netdev);
|
|
return -EIO;
|
|
}
|
|
|
|
result = kaweth_read_configuration(kaweth);
|
|
|
|
if(result < 0) {
|
|
dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
|
|
goto err_free_netdev;
|
|
}
|
|
|
|
dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
|
|
dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
|
|
dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
|
|
dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
|
|
|
|
if(!memcmp(&kaweth->configuration.hw_addr,
|
|
&bcast_addr,
|
|
sizeof(bcast_addr))) {
|
|
dev_err(dev, "Firmware not functioning properly, no net device created\n");
|
|
goto err_free_netdev;
|
|
}
|
|
|
|
if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
|
|
dev_dbg(dev, "Error setting URB size\n");
|
|
goto err_free_netdev;
|
|
}
|
|
|
|
if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
|
|
dev_err(dev, "Error setting SOFS wait\n");
|
|
goto err_free_netdev;
|
|
}
|
|
|
|
result = kaweth_set_receive_filter(kaweth,
|
|
KAWETH_PACKET_FILTER_DIRECTED |
|
|
KAWETH_PACKET_FILTER_BROADCAST |
|
|
KAWETH_PACKET_FILTER_MULTICAST);
|
|
|
|
if(result < 0) {
|
|
dev_err(dev, "Error setting receive filter\n");
|
|
goto err_free_netdev;
|
|
}
|
|
|
|
dev_dbg(dev, "Initializing net device.\n");
|
|
|
|
kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!kaweth->tx_urb)
|
|
goto err_free_netdev;
|
|
kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!kaweth->rx_urb)
|
|
goto err_only_tx;
|
|
kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!kaweth->irq_urb)
|
|
goto err_tx_and_rx;
|
|
|
|
kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
|
|
INTBUFFERSIZE,
|
|
GFP_KERNEL,
|
|
&kaweth->intbufferhandle);
|
|
if (!kaweth->intbuffer)
|
|
goto err_tx_and_rx_and_irq;
|
|
kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
|
|
KAWETH_BUF_SIZE,
|
|
GFP_KERNEL,
|
|
&kaweth->rxbufferhandle);
|
|
if (!kaweth->rx_buf)
|
|
goto err_all_but_rxbuf;
|
|
|
|
memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
|
|
memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
|
|
sizeof(kaweth->configuration.hw_addr));
|
|
|
|
netdev->netdev_ops = &kaweth_netdev_ops;
|
|
netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
|
|
netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
|
|
netdev->ethtool_ops = &ops;
|
|
|
|
/* kaweth is zeroed as part of alloc_netdev */
|
|
INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
|
|
usb_set_intfdata(intf, kaweth);
|
|
|
|
SET_NETDEV_DEV(netdev, dev);
|
|
if (register_netdev(netdev) != 0) {
|
|
dev_err(dev, "Error registering netdev.\n");
|
|
goto err_intfdata;
|
|
}
|
|
|
|
dev_info(dev, "kaweth interface created at %s\n",
|
|
kaweth->net->name);
|
|
|
|
return 0;
|
|
|
|
err_intfdata:
|
|
usb_set_intfdata(intf, NULL);
|
|
usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
|
|
err_all_but_rxbuf:
|
|
usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
|
|
err_tx_and_rx_and_irq:
|
|
usb_free_urb(kaweth->irq_urb);
|
|
err_tx_and_rx:
|
|
usb_free_urb(kaweth->rx_urb);
|
|
err_only_tx:
|
|
usb_free_urb(kaweth->tx_urb);
|
|
err_free_netdev:
|
|
free_netdev(netdev);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/****************************************************************
|
|
* kaweth_disconnect
|
|
****************************************************************/
|
|
static void kaweth_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct kaweth_device *kaweth = usb_get_intfdata(intf);
|
|
struct net_device *netdev;
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
if (!kaweth) {
|
|
dev_warn(&intf->dev, "unregistering non-existent device\n");
|
|
return;
|
|
}
|
|
netdev = kaweth->net;
|
|
|
|
netdev_dbg(kaweth->net, "Unregistering net device\n");
|
|
unregister_netdev(netdev);
|
|
|
|
usb_free_urb(kaweth->rx_urb);
|
|
usb_free_urb(kaweth->tx_urb);
|
|
usb_free_urb(kaweth->irq_urb);
|
|
|
|
usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
|
|
usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
|
|
|
|
free_netdev(netdev);
|
|
}
|
|
|
|
|
|
// FIXME this completion stuff is a modified clone of
|
|
// an OLD version of some stuff in usb.c ...
|
|
struct usb_api_data {
|
|
wait_queue_head_t wqh;
|
|
int done;
|
|
};
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* completion handler for compatibility wrappers (sync control/bulk) *
|
|
*-------------------------------------------------------------------*/
|
|
static void usb_api_blocking_completion(struct urb *urb)
|
|
{
|
|
struct usb_api_data *awd = (struct usb_api_data *)urb->context;
|
|
|
|
awd->done=1;
|
|
wake_up(&awd->wqh);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* COMPATIBILITY STUFF *
|
|
*-------------------------------------------------------------------*/
|
|
|
|
// Starts urb and waits for completion or timeout
|
|
static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
|
|
{
|
|
struct usb_api_data awd;
|
|
int status;
|
|
|
|
init_waitqueue_head(&awd.wqh);
|
|
awd.done = 0;
|
|
|
|
urb->context = &awd;
|
|
status = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (status) {
|
|
// something went wrong
|
|
usb_free_urb(urb);
|
|
return status;
|
|
}
|
|
|
|
if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
|
|
// timeout
|
|
dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
|
|
usb_kill_urb(urb); // remove urb safely
|
|
status = -ETIMEDOUT;
|
|
}
|
|
else {
|
|
status = urb->status;
|
|
}
|
|
|
|
if (actual_length) {
|
|
*actual_length = urb->actual_length;
|
|
}
|
|
|
|
usb_free_urb(urb);
|
|
return status;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------*/
|
|
// returns status (negative) or length (positive)
|
|
static int kaweth_internal_control_msg(struct usb_device *usb_dev,
|
|
unsigned int pipe,
|
|
struct usb_ctrlrequest *cmd, void *data,
|
|
int len, int timeout)
|
|
{
|
|
struct urb *urb;
|
|
int retv;
|
|
int length = 0; /* shut up GCC */
|
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
|
if (!urb)
|
|
return -ENOMEM;
|
|
|
|
usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
|
|
len, usb_api_blocking_completion, NULL);
|
|
|
|
retv = usb_start_wait_urb(urb, timeout, &length);
|
|
if (retv < 0) {
|
|
return retv;
|
|
}
|
|
else {
|
|
return length;
|
|
}
|
|
}
|
|
|
|
module_usb_driver(kaweth_driver);
|