kaweth.c

基于S3CEB2410平台LINUX操作系统下 USB驱动源代码

/****************************************************************
 *
 *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
 *
 *     (c) 2000 Interlan Communications
 *     (c) 2000 Stephane Alnet
 *     (C) 2001 Brad Hards
 *
 *     Original author: The Zapman <[e-mail]>
 *     Inspired by, and much credit goes to Michael Rothwell 
 *     <[e-mail]> for the test equipment, help, and patience
 *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
 *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki 
 *     for providing the firmware and driver resources.
 *
 *     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, 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. 
 *
 ****************************************************************/

/* TODO:
 * Fix in_interrupt() problem
 * Develop test procedures for USB net interfaces
 * Run test procedures
 * Fix bugs from previous two steps
 * Snoop other OSs for any tricks we're not doing
 * SMP locking
 * Reduce arbitrary timeouts 
 * Smart multicast support 
 * Temporary MAC change support
 * Tunable SOFs parameter - ioctl()?
 * Ethernet stats collection
 * Code formatting improvements
 */

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/usb.h>
#include <linux/types.h>
#include <asm/semaphore.h>

#define DEBUG

#ifdef DEBUG
#define kaweth_dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" ,##arg)
#else
#define kaweth_dbg(format, arg...) do {} while (0)
#endif
#define kaweth_err(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" ,##arg)
#define kaweth_info(format, arg...) printk(KERN_INFO __FILE__ ": " format "\n" , ##arg)
#define kaweth_warn(format, arg...) printk(KERN_WARNING __FILE__ ": " format "\n" , ##arg)


#include "kawethfw.h"

#define KAWETH_MTU			1514
#define KAWETH_BUF_SIZE			1664
#define KAWETH_TX_TIMEOUT		(5 * HZ)
#define KAWETH_FIRMWARE_BUF_SIZE	4096
#define KAWETH_CONTROL_TIMEOUT		(30 * HZ)

#define KAWETH_STATUS_BROKEN		0x0000001
#define KAWETH_STATUS_CLOSING		0x0000002

#define KAWETH_PACKET_FILTER_PROMISCUOUS	0x01
#define KAWETH_PACKET_FILTER_ALL_MULTICAST	0x02
#define KAWETH_PACKET_FILTER_DIRECTED		0x04
#define KAWETH_PACKET_FILTER_BROADCAST		0x08
#define KAWETH_PACKET_FILTER_MULTICAST		0x10

/* Table 7 */
#define KAWETH_COMMAND_GET_ETHERNET_DESC	0x00
#define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
#define KAWETH_COMMAND_SET_PACKET_FILTER	0x02
#define KAWETH_COMMAND_STATISTICS               0x03
#define KAWETH_COMMAND_SET_TEMP_MAC     	0x06
#define KAWETH_COMMAND_GET_TEMP_MAC             0x07
#define KAWETH_COMMAND_SET_URB_SIZE		0x08
#define KAWETH_COMMAND_SET_SOFS_WAIT		0x09
#define KAWETH_COMMAND_SCAN			0xFF

#define KAWETH_SOFS_TO_WAIT			0x05


MODULE_AUTHOR("Michael Zappe <[e-mail]>, Stephane Alnet <[e-mail]> and Brad Hards <[e-mail]>");
MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
MODULE_LICENSE("GPL");

static void *kaweth_probe(
            struct usb_device *dev,             /* the device */
            unsigned ifnum,                     /* what interface */
            const struct usb_device_id *id      /* from id_table */
	);
static void kaweth_disconnect(struct usb_device *dev, void *ptr);
int kaweth_internal_control_msg(struct usb_device *usb_dev, unsigned int pipe,
				devrequest *cmd, void *data, int len,
				int timeout);

/****************************************************************
 *     usb_device_id
 ****************************************************************/
static struct usb_device_id usb_klsi_table[] = {
	{ USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 
	{ USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
	{ USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 
	{ USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 
	{ USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 
	{ USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
	{ USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 
	{ USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
	{ USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
	{ USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 
	{ USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 
	{ USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 
	{ USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 
	{ USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 
	{ USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
	{ USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
	{ USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
	{ USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
	{ USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
	{ USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
	{ USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
	{ USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
	{ USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
	{ USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
	{ USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
	{ USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 
	{ USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 
	{ USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 
	{ USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
	{} /* Null terminator */
};

MODULE_DEVICE_TABLE (usb, usb_klsi_table);

/****************************************************************
 *     kaweth_driver
 ****************************************************************/
static struct usb_driver kaweth_driver = {
	name:		"kaweth",
	probe:		kaweth_probe,
	disconnect:	kaweth_disconnect,
	id_table:       usb_klsi_table,
};

typedef __u8 eth_addr_t[6];

/****************************************************************
 *     usb_eth_dev
 ****************************************************************/
struct usb_eth_dev {
	char *name;
	__u16 vendor;
	__u16 device;
	void *pdata;
};

/****************************************************************
 *     kaweth_ethernet_configuration
 *     Refer Table 8
 ****************************************************************/
struct kaweth_ethernet_configuration
{
	__u8 size;
	__u8 reserved1;
	__u8 reserved2;
	eth_addr_t hw_addr;
	__u32 statistics_mask;
	__u16 segment_size;
	__u16 max_multicast_filters;
	__u8 reserved3;
} __attribute__ ((packed));

/****************************************************************
 *     kaweth_device
 ****************************************************************/
struct kaweth_device
{
	spinlock_t device_lock;

	__u32 status;

	struct usb_device *dev;
	struct net_device *net;
	wait_queue_head_t control_wait;

	struct urb *rx_urb;
	struct urb *tx_urb;
	
	__u8 firmware_buf[KAWETH_FIRMWARE_BUF_SIZE];
	__u8 tx_buf[KAWETH_BUF_SIZE];
	__u8 rx_buf[KAWETH_BUF_SIZE];
	__u16 packet_filter_bitmap;

	struct kaweth_ethernet_configuration configuration;

	struct net_device_stats stats;
} __attribute__ ((packed));


/****************************************************************
 *     kaweth_control
 ****************************************************************/
static int kaweth_control(struct kaweth_device *kaweth,
			  unsigned int pipe, 
			  __u8 request, 
			  __u8 requesttype, 
			  __u16 value, 
			  __u16 index,
			  void *data, 
			  __u16 size, 
			  int timeout)
{
	devrequest *dr;

	kaweth_dbg("kaweth_control()");

	if(in_interrupt()) {
		kaweth_dbg("in_interrupt()");
		return -EBUSY;
	}

	dr = kmalloc(sizeof(devrequest), 
                     in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);

	if(!dr)
	{
		kaweth_dbg("kmalloc() failed");
		return -ENOMEM;
	}
	
	dr->requesttype = requesttype;
	dr->request = request;
	dr->value = cpu_to_le16p(&value);
	dr->index = cpu_to_le16p(&index);
	dr->length = cpu_to_le16p(&size);

	return kaweth_internal_control_msg(kaweth->dev,
					pipe,
					dr,
					data,
					size,
					timeout);
}

/****************************************************************
 *     kaweth_read_configuration
 ****************************************************************/
static int kaweth_read_configuration(struct kaweth_device *kaweth)
{
	int retval;

	kaweth_dbg("Reading kaweth configuration");

	retval = kaweth_control(kaweth,
				usb_rcvctrlpipe(kaweth->dev, 0),
				KAWETH_COMMAND_GET_ETHERNET_DESC,
				USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
				0,
				0,
				(void *)&kaweth->configuration,
				sizeof(kaweth->configuration),
				KAWETH_CONTROL_TIMEOUT);

	return retval;
}

/****************************************************************
 *     kaweth_set_urb_size
 ****************************************************************/
static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
{
	int retval;

	kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);

	retval = kaweth_control(kaweth,
				usb_sndctrlpipe(kaweth->dev, 0),
				KAWETH_COMMAND_SET_URB_SIZE,
				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
				urb_size,
				0,
				(void *)&kaweth->firmware_buf,
				0,
				KAWETH_CONTROL_TIMEOUT);

	return retval;
}

/****************************************************************
 *     kaweth_set_sofs_wait
 ****************************************************************/
static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
{
	int retval;

	kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);

	retval = kaweth_control(kaweth,
				usb_sndctrlpipe(kaweth->dev, 0),
				KAWETH_COMMAND_SET_SOFS_WAIT,
				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
				sofs_wait,
				0,
				(void *)&kaweth->firmware_buf,
				0,
				KAWETH_CONTROL_TIMEOUT);

	return retval;
}

/****************************************************************
 *     kaweth_set_receive_filter
 ****************************************************************/
static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
				     __u16 receive_filter)
{
	int retval;

	kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);

	retval = kaweth_control(kaweth,
				usb_sndctrlpipe(kaweth->dev, 0),
				KAWETH_COMMAND_SET_PACKET_FILTER,
				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
				receive_filter,
				0,
				(void *)&kaweth->firmware_buf,
				0,
				KAWETH_CONTROL_TIMEOUT);

	return retval;
}

/****************************************************************
 *     kaweth_download_firmware
 ****************************************************************/
static int kaweth_download_firmware(struct kaweth_device *kaweth, 
				    __u8 *data, 
				    __u16 data_len,
				    __u8 interrupt,
				    __u8 type)
{	
	if(data_len > KAWETH_FIRMWARE_BUF_SIZE)	{
		kaweth_err("Firmware too big: %d", data_len);
		return -ENOSPC;
	}
	
	memcpy(kaweth->firmware_buf, data, data_len);
	
	kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
	kaweth->firmware_buf[3] = data_len >> 8;
	kaweth->firmware_buf[4] = type;
	kaweth->firmware_buf[5] = interrupt;

	kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
		   kaweth->firmware_buf[2]);

	kaweth_dbg("Downloading firmware at %p to kaweth device at %p", 
	    data, 
	    kaweth);
	kaweth_dbg("Firmware length: %d", data_len);

	return kaweth_control(kaweth,
		              usb_sndctrlpipe(kaweth->dev, 0),
			      KAWETH_COMMAND_SCAN,
			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
			      0,
			      0,
			      (void *)&kaweth->firmware_buf,
			      data_len,
			      KAWETH_CONTROL_TIMEOUT);
}

/****************************************************************
 *     kaweth_trigger_firmware
 ****************************************************************/
static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
				   __u8 interrupt)
{
	kaweth->firmware_buf[0] = 0xB6;
	kaweth->firmware_buf[1] = 0xC3;
	kaweth->firmware_buf[2] = 0x01;
	kaweth->firmware_buf[3] = 0x00;
	kaweth->firmware_buf[4] = 0x06;
	kaweth->firmware_buf[5] = interrupt;
	kaweth->firmware_buf[6] = 0x00;
	kaweth->firmware_buf[7] = 0x00;
	
	kaweth_dbg("Triggering firmware");

	return kaweth_control(kaweth,
			      usb_sndctrlpipe(kaweth->dev, 0),
			      KAWETH_COMMAND_SCAN,
			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
			      0,
			      0,
			      (void *)&kaweth->firmware_buf,
			      8,
			      KAWETH_CONTROL_TIMEOUT);
}

/****************************************************************
 *     kaweth_reset
 ****************************************************************/
static int kaweth_reset(struct kaweth_device *kaweth)
{
	int result;

	kaweth_dbg("kaweth_reset(%p)", kaweth);
	result = kaweth_control(kaweth,
				usb_sndctrlpipe(kaweth->dev, 0),
				USB_REQ_SET_CONFIGURATION, 
				0, 
				kaweth->dev->config[0].bConfigurationValue,
				0, 
				NULL, 
				0, 
				KAWETH_CONTROL_TIMEOUT);

	udelay(10000);

	kaweth_dbg("kaweth_reset() returns %d.",result);

	return result;
}

static void kaweth_usb_receive(struct urb *);

/****************************************************************
 *     kaweth_resubmit_rx_urb
 ****************************************************************/
static inline void kaweth_resubmit_rx_urb(struct kaweth_device *kaweth)
{
	int result;

	memset(kaweth->rx_urb, 0, sizeof(*kaweth->rx_urb));

	FILL_BULK_URB(kaweth->rx_urb,
		      kaweth->dev,
		      usb_rcvbulkpipe(kaweth->dev, 1),
		      kaweth->rx_buf,
		      KAWETH_BUF_SIZE,
		      kaweth_usb_receive,
		      kaweth);

	if((result = usb_submit_urb(kaweth->rx_urb))) {
		kaweth_err("resubmitting rx_urb %d failed", result);
	}
}

static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);

/****************************************************************
 *     kaweth_usb_receive
 ****************************************************************/
static void kaweth_usb_receive(struct urb *urb)
{
	struct kaweth_device *kaweth = urb->context;
	struct net_device *net = kaweth->net;
	
	int count = urb->actual_length;
	int count2 = urb->transfer_buffer_length;
			
	__u16 pkt_len = le16_to_cpup((u16 *)kaweth->rx_buf);

	struct sk_buff *skb;

	if(kaweth->status & KAWETH_STATUS_CLOSING) {
		return;
	}
	
	if(urb->status && urb->status != -EREMOTEIO && count != 1) { 
		kaweth_err("%s RX status: %d count: %d packet_len: %d",
                           net->name, 
			   urb->status,
			   count, 
			   (int)pkt_len);
		kaweth_resubmit_rx_urb(kaweth);
                return;
	}

	if(kaweth->net && (count > 2)) {
		if(pkt_len > (count - 2)) {
			kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
			kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
			kaweth_err("Count 2: %x", count2);
		        kaweth_resubmit_rx_urb(kaweth);
                        return;
                }
		
		if(!(skb = dev_alloc_skb(pkt_len+2))) {
		        kaweth_resubmit_rx_urb(kaweth);
                        return;
		}

		skb->dev = net;

		eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
		
		skb_put(skb, pkt_len);

		skb->protocol = eth_type_trans(skb, net);
		
		netif_rx(skb);
		
		kaweth->stats.rx_packets++;
		kaweth->stats.rx_bytes += pkt_len;
	}

	kaweth_resubmit_rx_urb(kaweth);
}