1/*
   2 *  Copyright (c) 1999-2013 Petko Manolov (petkan@nucleusys.com)
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 *	ChangeLog:
   9 *		....	Most of the time spent on reading sources & docs.
  10 *		v0.2.x	First official release for the Linux kernel.
  11 *		v0.3.0	Beutified and structured, some bugs fixed.
  12 *		v0.3.x	URBifying bulk requests and bugfixing. First relatively
  13 *			stable release. Still can touch device's registers only
  14 *			from top-halves.
  15 *		v0.4.0	Control messages remained unurbified are now URBs.
  16 *			Now we can touch the HW at any time.
  17 *		v0.4.9	Control urbs again use process context to wait. Argh...
  18 *			Some long standing bugs (enable_net_traffic) fixed.
  19 *			Also nasty trick about resubmiting control urb from
  20 *			interrupt context used. Please let me know how it
  21 *			behaves. Pegasus II support added since this version.
  22 *			TODO: suppressing HCD warnings spewage on disconnect.
  23 *		v0.4.13	Ethernet address is now set at probe(), not at open()
  24 *			time as this seems to break dhcpd.
  25 *		v0.5.0	branch to 2.5.x kernels
  26 *		v0.5.1	ethtool support added
  27 *		v0.5.5	rx socket buffers are in a pool and the their allocation
  28 *			is out of the interrupt routine.
  29 *		...
  30 *		v0.9.3	simplified [get|set]_register(s), async update registers
  31 *			logic revisited, receive skb_pool removed.
  32 */
  33
  34#include <linux/sched.h>
  35#include <linux/slab.h>
  36#include <linux/init.h>
  37#include <linux/delay.h>
  38#include <linux/netdevice.h>
  39#include <linux/etherdevice.h>
  40#include <linux/ethtool.h>
  41#include <linux/mii.h>
  42#include <linux/usb.h>
  43#include <linux/module.h>
  44#include <asm/byteorder.h>
  45#include <linux/uaccess.h>
  46#include "pegasus.h"
  47
  48/*
  49 * Version Information
  50 */
  51#define DRIVER_VERSION "v0.9.3 (2013/04/25)"
  52#define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"
  53#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  54
  55static const char driver_name[] = "pegasus";
  56
  57#undef	PEGASUS_WRITE_EEPROM
  58#define	BMSR_MEDIA	(BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  59			BMSR_100FULL | BMSR_ANEGCAPABLE)
  60
  61static bool loopback;
  62static bool mii_mode;
  63static char *devid;
  64
  65static struct usb_eth_dev usb_dev_id[] = {
  66#define	PEGASUS_DEV(pn, vid, pid, flags)	\
  67	{.name = pn, .vendor = vid, .device = pid, .private = flags},
  68#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
  69	PEGASUS_DEV(pn, vid, pid, flags)
  70#include "pegasus.h"
  71#undef	PEGASUS_DEV
  72#undef	PEGASUS_DEV_CLASS
  73	{NULL, 0, 0, 0},
  74	{NULL, 0, 0, 0}
  75};
  76
  77static struct usb_device_id pegasus_ids[] = {
  78#define	PEGASUS_DEV(pn, vid, pid, flags) \
  79	{.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  80/*
  81 * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
  82 * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
  83 * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
  84 * case anyway, seeing as the pegasus is for "Wired" adaptors.
  85 */
  86#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
  87	{.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
  88	.idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
  89#include "pegasus.h"
  90#undef	PEGASUS_DEV
  91#undef	PEGASUS_DEV_CLASS
  92	{},
  93	{}
  94};
  95
  96MODULE_AUTHOR(DRIVER_AUTHOR);
  97MODULE_DESCRIPTION(DRIVER_DESC);
  98MODULE_LICENSE("GPL");
  99module_param(loopback, bool, 0);
 100module_param(mii_mode, bool, 0);
 101module_param(devid, charp, 0);
 102MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
 103MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
 104MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
 105
 106/* use ethtool to change the level for any given device */
 107static int msg_level = -1;
 108module_param(msg_level, int, 0);
 109MODULE_PARM_DESC(msg_level, "Override default message level");
 110
 111MODULE_DEVICE_TABLE(usb, pegasus_ids);
 112static const struct net_device_ops pegasus_netdev_ops;
 113
 114/*****/
 115
 116static void async_ctrl_callback(struct urb *urb)
 117{
 118	struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
 119	int status = urb->status;
 120
 121	if (status < 0)
 122		dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 123	kfree(req);
 124	usb_free_urb(urb);
 125}
 126
 127static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
 128{
 129	u8 *buf;
 130	int ret;
 131
 132	buf = kmalloc(size, GFP_NOIO);
 133	if (!buf)
 134		return -ENOMEM;
 135
 136	ret = usb_control_msg(pegasus->usb, usb_rcvctrlpipe(pegasus->usb, 0),
 137			      PEGASUS_REQ_GET_REGS, PEGASUS_REQT_READ, 0,
 138			      indx, buf, size, 1000);
 139	if (ret < 0)
 140		netif_dbg(pegasus, drv, pegasus->net,
 141			  "%s returned %d\n", __func__, ret);
 142	else if (ret <= size)
 143		memcpy(data, buf, ret);
 144	kfree(buf);
 145	return ret;
 146}
 147
 148static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
 149			 const void *data)
 150{
 151	u8 *buf;
 152	int ret;
 153
 154	buf = kmemdup(data, size, GFP_NOIO);
 155	if (!buf)
 156		return -ENOMEM;
 157
 158	ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
 159			      PEGASUS_REQ_SET_REGS, PEGASUS_REQT_WRITE, 0,
 160			      indx, buf, size, 100);
 161	if (ret < 0)
 162		netif_dbg(pegasus, drv, pegasus->net,
 163			  "%s returned %d\n", __func__, ret);
 164	kfree(buf);
 165	return ret;
 166}
 167
 168static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
 169{
 170	u8 *buf;
 171	int ret;
 172
 173	buf = kmemdup(&data, 1, GFP_NOIO);
 174	if (!buf)
 175		return -ENOMEM;
 176
 177	ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
 178			      PEGASUS_REQ_SET_REG, PEGASUS_REQT_WRITE, data,
 179			      indx, buf, 1, 1000);
 180	if (ret < 0)
 181		netif_dbg(pegasus, drv, pegasus->net,
 182			  "%s returned %d\n", __func__, ret);
 183	kfree(buf);
 184	return ret;
 185}
 186
 187static int update_eth_regs_async(pegasus_t *pegasus)
 188{
 189	int ret = -ENOMEM;
 190	struct urb *async_urb;
 191	struct usb_ctrlrequest *req;
 192
 193	req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 194	if (req == NULL)
 195		return ret;
 196
 197	async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 198	if (async_urb == NULL) {
 199		kfree(req);
 200		return ret;
 201	}
 202	req->bRequestType = PEGASUS_REQT_WRITE;
 203	req->bRequest = PEGASUS_REQ_SET_REGS;
 204	req->wValue = cpu_to_le16(0);
 205	req->wIndex = cpu_to_le16(EthCtrl0);
 206	req->wLength = cpu_to_le16(3);
 207
 208	usb_fill_control_urb(async_urb, pegasus->usb,
 209			     usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
 210			     pegasus->eth_regs, 3, async_ctrl_callback, req);
 211
 212	ret = usb_submit_urb(async_urb, GFP_ATOMIC);
 213	if (ret) {
 214		if (ret == -ENODEV)
 215			netif_device_detach(pegasus->net);
 216		netif_err(pegasus, drv, pegasus->net,
 217			  "%s returned %d\n", __func__, ret);
 218	}
 219	return ret;
 220}
 221
 222static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
 223{
 224	int i;
 225	__u8 data[4] = { phy, 0, 0, indx };
 226	__le16 regdi;
 227	int ret = -ETIMEDOUT;
 228
 229	if (cmd & PHY_WRITE) {
 230		__le16 *t = (__le16 *) & data[1];
 231		*t = cpu_to_le16(*regd);
 232	}
 233	set_register(p, PhyCtrl, 0);
 234	set_registers(p, PhyAddr, sizeof(data), data);
 235	set_register(p, PhyCtrl, (indx | cmd));
 236	for (i = 0; i < REG_TIMEOUT; i++) {
 237		ret = get_registers(p, PhyCtrl, 1, data);
 238		if (ret < 0)
 239			goto fail;
 240		if (data[0] & PHY_DONE)
 241			break;
 242	}
 243	if (i >= REG_TIMEOUT)
 244		goto fail;
 245	if (cmd & PHY_READ) {
 246		ret = get_registers(p, PhyData, 2, &regdi);
 247		*regd = le16_to_cpu(regdi);
 248		return ret;
 249	}
 250	return 0;
 251fail:
 252	netif_dbg(p, drv, p->net, "%s failed\n", __func__);
 253	return ret;
 254}
 255
 256/* Returns non-negative int on success, error on failure */
 257static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
 258{
 259	return __mii_op(pegasus, phy, indx, regd, PHY_READ);
 260}
 261
 262/* Returns zero on success, error on failure */
 263static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
 264{
 265	return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
 266}
 267
 268static int mdio_read(struct net_device *dev, int phy_id, int loc)
 269{
 270	pegasus_t *pegasus = netdev_priv(dev);
 271	u16 res;
 272
 273	read_mii_word(pegasus, phy_id, loc, &res);
 274	return (int)res;
 275}
 276
 277static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 278{
 279	pegasus_t *pegasus = netdev_priv(dev);
 280	u16 data = val;
 281
 282	write_mii_word(pegasus, phy_id, loc, &data);
 283}
 284
 285static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
 286{
 287	int i;
 288	__u8 tmp;
 289	__le16 retdatai;
 290	int ret;
 291
 292	set_register(pegasus, EpromCtrl, 0);
 293	set_register(pegasus, EpromOffset, index);
 294	set_register(pegasus, EpromCtrl, EPROM_READ);
 295
 296	for (i = 0; i < REG_TIMEOUT; i++) {
 297		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 298		if (tmp & EPROM_DONE)
 299			break;
 300		if (ret == -ESHUTDOWN)
 301			goto fail;
 302	}
 303	if (i >= REG_TIMEOUT)
 304		goto fail;
 305
 306	ret = get_registers(pegasus, EpromData, 2, &retdatai);
 307	*retdata = le16_to_cpu(retdatai);
 308	return ret;
 309
 310fail:
 311	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 312	return -ETIMEDOUT;
 313}
 314
 315#ifdef	PEGASUS_WRITE_EEPROM
 316static inline void enable_eprom_write(pegasus_t *pegasus)
 317{
 318	__u8 tmp;
 319
 320	get_registers(pegasus, EthCtrl2, 1, &tmp);
 321	set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 322}
 323
 324static inline void disable_eprom_write(pegasus_t *pegasus)
 325{
 326	__u8 tmp;
 327
 328	get_registers(pegasus, EthCtrl2, 1, &tmp);
 329	set_register(pegasus, EpromCtrl, 0);
 330	set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 331}
 332
 333static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
 334{
 335	int i;
 336	__u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 337	int ret;
 338	__le16 le_data = cpu_to_le16(data);
 339
 340	set_registers(pegasus, EpromOffset, 4, d);
 341	enable_eprom_write(pegasus);
 342	set_register(pegasus, EpromOffset, index);
 343	set_registers(pegasus, EpromData, 2, &le_data);
 344	set_register(pegasus, EpromCtrl, EPROM_WRITE);
 345
 346	for (i = 0; i < REG_TIMEOUT; i++) {
 347		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 348		if (ret == -ESHUTDOWN)
 349			goto fail;
 350		if (tmp & EPROM_DONE)
 351			break;
 352	}
 353	disable_eprom_write(pegasus);
 354	if (i >= REG_TIMEOUT)
 355		goto fail;
 356
 357	return ret;
 358
 359fail:
 360	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 361	return -ETIMEDOUT;
 362}
 363#endif				/* PEGASUS_WRITE_EEPROM */
 364
 365static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
 366{
 367	int i;
 368	__u16 w16;
 369
 370	for (i = 0; i < 3; i++) {
 371		read_eprom_word(pegasus, i, &w16);
 372		((__le16 *) id)[i] = cpu_to_le16(w16);
 373	}
 374}
 375
 376static void set_ethernet_addr(pegasus_t *pegasus)
 377{
 378	__u8 node_id[6];
 379
 380	if (pegasus->features & PEGASUS_II) {
 381		get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 382	} else {
 383		get_node_id(pegasus, node_id);
 384		set_registers(pegasus, EthID, sizeof(node_id), node_id);
 385	}
 386	memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
 387}
 388
 389static inline int reset_mac(pegasus_t *pegasus)
 390{
 391	__u8 data = 0x8;
 392	int i;
 393
 394	set_register(pegasus, EthCtrl1, data);
 395	for (i = 0; i < REG_TIMEOUT; i++) {
 396		get_registers(pegasus, EthCtrl1, 1, &data);
 397		if (~data & 0x08) {
 398			if (loopback)
 399				break;
 400			if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 401				set_register(pegasus, Gpio1, 0x34);
 402			else
 403				set_register(pegasus, Gpio1, 0x26);
 404			set_register(pegasus, Gpio0, pegasus->features);
 405			set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 406			break;
 407		}
 408	}
 409	if (i == REG_TIMEOUT)
 410		return -ETIMEDOUT;
 411
 412	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 413	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 414		set_register(pegasus, Gpio0, 0x24);
 415		set_register(pegasus, Gpio0, 0x26);
 416	}
 417	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 418		__u16 auxmode;
 419		read_mii_word(pegasus, 3, 0x1b, &auxmode);
 420		auxmode |= 4;
 421		write_mii_word(pegasus, 3, 0x1b, &auxmode);
 422	}
 423
 424	return 0;
 425}
 426
 427static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 428{
 429	__u16 linkpart;
 430	__u8 data[4];
 431	pegasus_t *pegasus = netdev_priv(dev);
 432	int ret;
 433
 434	read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 435	data[0] = 0xc8; /* TX & RX enable, append status, no CRC */
 436	data[1] = 0;
 437	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 438		data[1] |= 0x20;	/* set full duplex */
 439	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 440		data[1] |= 0x10;	/* set 100 Mbps */
 441	if (mii_mode)
 442		data[1] = 0;
 443	data[2] = loopback ? 0x09 : 0x01;
 444
 445	memcpy(pegasus->eth_regs, data, sizeof(data));
 446	ret = set_registers(pegasus, EthCtrl0, 3, data);
 447
 448	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 449	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 450	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 451		u16 auxmode;
 452		read_mii_word(pegasus, 0, 0x1b, &auxmode);
 453		auxmode |= 4;
 454		write_mii_word(pegasus, 0, 0x1b, &auxmode);
 455	}
 456
 457	return ret;
 458}
 459
 460static void read_bulk_callback(struct urb *urb)
 461{
 462	pegasus_t *pegasus = urb->context;
 463	struct net_device *net;
 464	int rx_status, count = urb->actual_length;
 465	int status = urb->status;
 466	u8 *buf = urb->transfer_buffer;
 467	__u16 pkt_len;
 468
 469	if (!pegasus)
 470		return;
 471
 472	net = pegasus->net;
 473	if (!netif_device_present(net) || !netif_running(net))
 474		return;
 475
 476	switch (status) {
 477	case 0:
 478		break;
 479	case -ETIME:
 480		netif_dbg(pegasus, rx_err, net, "reset MAC\n");
 481		pegasus->flags &= ~PEGASUS_RX_BUSY;
 482		break;
 483	case -EPIPE:		/* stall, or disconnect from TT */
 484		/* FIXME schedule work to clear the halt */
 485		netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
 486		return;
 487	case -ENOENT:
 488	case -ECONNRESET:
 489	case -ESHUTDOWN:
 490		netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
 491		return;
 492	default:
 493		netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
 494		goto goon;
 495	}
 496
 497	if (count < 4)
 498		goto goon;
 499
 500	rx_status = buf[count - 2];
 501	if (rx_status & 0x1e) {
 502		netif_dbg(pegasus, rx_err, net,
 503			  "RX packet error %x\n", rx_status);
 504		net->stats.rx_errors++;
 505		if (rx_status & 0x06)	/* long or runt	*/
 506			net->stats.rx_length_errors++;
 507		if (rx_status & 0x08)
 508			net->stats.rx_crc_errors++;
 509		if (rx_status & 0x10)	/* extra bits	*/
 510			net->stats.rx_frame_errors++;
 511		goto goon;
 512	}
 513	if (pegasus->chip == 0x8513) {
 514		pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 515		pkt_len &= 0x0fff;
 516		pegasus->rx_skb->data += 2;
 517	} else {
 518		pkt_len = buf[count - 3] << 8;
 519		pkt_len += buf[count - 4];
 520		pkt_len &= 0xfff;
 521		pkt_len -= 4;
 522	}
 523
 524	/*
 525	 * If the packet is unreasonably long, quietly drop it rather than
 526	 * kernel panicing by calling skb_put.
 527	 */
 528	if (pkt_len > PEGASUS_MTU)
 529		goto goon;
 530
 531	/*
 532	 * at this point we are sure pegasus->rx_skb != NULL
 533	 * so we go ahead and pass up the packet.
 534	 */
 535	skb_put(pegasus->rx_skb, pkt_len);
 536	pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 537	netif_rx(pegasus->rx_skb);
 538	net->stats.rx_packets++;
 539	net->stats.rx_bytes += pkt_len;
 540
 541	if (pegasus->flags & PEGASUS_UNPLUG)
 542		return;
 543
 544	pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
 545						      GFP_ATOMIC);
 546
 547	if (pegasus->rx_skb == NULL)
 548		goto tl_sched;
 549goon:
 550	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 551			  usb_rcvbulkpipe(pegasus->usb, 1),
 552			  pegasus->rx_skb->data, PEGASUS_MTU,
 553			  read_bulk_callback, pegasus);
 554	rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 555	if (rx_status == -ENODEV)
 556		netif_device_detach(pegasus->net);
 557	else if (rx_status) {
 558		pegasus->flags |= PEGASUS_RX_URB_FAIL;
 559		goto tl_sched;
 560	} else {
 561		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 562	}
 563
 564	return;
 565
 566tl_sched:
 567	tasklet_schedule(&pegasus->rx_tl);
 568}
 569
 570static void rx_fixup(unsigned long data)
 571{
 572	pegasus_t *pegasus;
 573	int status;
 574
 575	pegasus = (pegasus_t *) data;
 576	if (pegasus->flags & PEGASUS_UNPLUG)
 577		return;
 578
 579	if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 580		if (pegasus->rx_skb)
 581			goto try_again;
 582	if (pegasus->rx_skb == NULL)
 583		pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
 584							      PEGASUS_MTU,
 585							      GFP_ATOMIC);
 586	if (pegasus->rx_skb == NULL) {
 587		netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
 588		tasklet_schedule(&pegasus->rx_tl);
 589		return;
 590	}
 591	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 592			  usb_rcvbulkpipe(pegasus->usb, 1),
 593			  pegasus->rx_skb->data, PEGASUS_MTU,
 594			  read_bulk_callback, pegasus);
 595try_again:
 596	status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 597	if (status == -ENODEV)
 598		netif_device_detach(pegasus->net);
 599	else if (status) {
 600		pegasus->flags |= PEGASUS_RX_URB_FAIL;
 601		tasklet_schedule(&pegasus->rx_tl);
 602	} else {
 603		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 604	}
 605}
 606
 607static void write_bulk_callback(struct urb *urb)
 608{
 609	pegasus_t *pegasus = urb->context;
 610	struct net_device *net;
 611	int status = urb->status;
 612
 613	if (!pegasus)
 614		return;
 615
 616	net = pegasus->net;
 617
 618	if (!netif_device_present(net) || !netif_running(net))
 619		return;
 620
 621	switch (status) {
 622	case -EPIPE:
 623		/* FIXME schedule_work() to clear the tx halt */
 624		netif_stop_queue(net);
 625		netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
 626		return;
 627	case -ENOENT:
 628	case -ECONNRESET:
 629	case -ESHUTDOWN:
 630		netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
 631		return;
 632	default:
 633		netif_info(pegasus, tx_err, net, "TX status %d\n", status);
 634		/* FALL THROUGH */
 635	case 0:
 636		break;
 637	}
 638
 639	netif_trans_update(net); /* prevent tx timeout */
 640	netif_wake_queue(net);
 641}
 642
 643static void intr_callback(struct urb *urb)
 644{
 645	pegasus_t *pegasus = urb->context;
 646	struct net_device *net;
 647	int res, status = urb->status;
 648
 649	if (!pegasus)
 650		return;
 651	net = pegasus->net;
 652
 653	switch (status) {
 654	case 0:
 655		break;
 656	case -ECONNRESET:	/* unlink */
 657	case -ENOENT:
 658	case -ESHUTDOWN:
 659		return;
 660	default:
 661		/* some Pegasus-I products report LOTS of data
 662		 * toggle errors... avoid log spamming
 663		 */
 664		netif_dbg(pegasus, timer, net, "intr status %d\n", status);
 665	}
 666
 667	if (urb->actual_length >= 6) {
 668		u8 *d = urb->transfer_buffer;
 669
 670		/* byte 0 == tx_status1, reg 2B */
 671		if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 672					|LATE_COL|JABBER_TIMEOUT)) {
 673			net->stats.tx_errors++;
 674			if (d[0] & TX_UNDERRUN)
 675				net->stats.tx_fifo_errors++;
 676			if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 677				net->stats.tx_aborted_errors++;
 678			if (d[0] & LATE_COL)
 679				net->stats.tx_window_errors++;
 680		}
 681
 682		/* d[5].LINK_STATUS lies on some adapters.
 683		 * d[0].NO_CARRIER kicks in only with failed TX.
 684		 * ... so monitoring with MII may be safest.
 685		 */
 686
 687		/* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 688		net->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 689	}
 690
 691	res = usb_submit_urb(urb, GFP_ATOMIC);
 692	if (res == -ENODEV)
 693		netif_device_detach(pegasus->net);
 694	if (res)
 695		netif_err(pegasus, timer, net,
 696			  "can't resubmit interrupt urb, %d\n", res);
 697}
 698
 699static void pegasus_tx_timeout(struct net_device *net)
 700{
 701	pegasus_t *pegasus = netdev_priv(net);
 702	netif_warn(pegasus, timer, net, "tx timeout\n");
 703	usb_unlink_urb(pegasus->tx_urb);
 704	net->stats.tx_errors++;
 705}
 706
 707static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
 708					    struct net_device *net)
 709{
 710	pegasus_t *pegasus = netdev_priv(net);
 711	int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 712	int res;
 713	__u16 l16 = skb->len;
 714
 715	netif_stop_queue(net);
 716
 717	((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 718	skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 719	usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 720			  usb_sndbulkpipe(pegasus->usb, 2),
 721			  pegasus->tx_buff, count,
 722			  write_bulk_callback, pegasus);
 723	if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 724		netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
 725		switch (res) {
 726		case -EPIPE:		/* stall, or disconnect from TT */
 727			/* cleanup should already have been scheduled */
 728			break;
 729		case -ENODEV:		/* disconnect() upcoming */
 730		case -EPERM:
 731			netif_device_detach(pegasus->net);
 732			break;
 733		default:
 734			net->stats.tx_errors++;
 735			netif_start_queue(net);
 736		}
 737	} else {
 738		net->stats.tx_packets++;
 739		net->stats.tx_bytes += skb->len;
 740	}
 741	dev_kfree_skb(skb);
 742
 743	return NETDEV_TX_OK;
 744}
 745
 
 
 
 
 
 746static inline void disable_net_traffic(pegasus_t *pegasus)
 747{
 748	__le16 tmp = cpu_to_le16(0);
 749
 750	set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
 751}
 752
 753static inline void get_interrupt_interval(pegasus_t *pegasus)
 754{
 755	u16 data;
 756	u8 interval;
 757
 758	read_eprom_word(pegasus, 4, &data);
 759	interval = data >> 8;
 760	if (pegasus->usb->speed != USB_SPEED_HIGH) {
 761		if (interval < 0x80) {
 762			netif_info(pegasus, timer, pegasus->net,
 763				   "intr interval changed from %ums to %ums\n",
 764				   interval, 0x80);
 765			interval = 0x80;
 766			data = (data & 0x00FF) | ((u16)interval << 8);
 767#ifdef PEGASUS_WRITE_EEPROM
 768			write_eprom_word(pegasus, 4, data);
 769#endif
 770		}
 771	}
 772	pegasus->intr_interval = interval;
 773}
 774
 775static void set_carrier(struct net_device *net)
 776{
 777	pegasus_t *pegasus = netdev_priv(net);
 778	u16 tmp;
 779
 780	if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 781		return;
 782
 783	if (tmp & BMSR_LSTATUS)
 784		netif_carrier_on(net);
 785	else
 786		netif_carrier_off(net);
 787}
 788
 789static void free_all_urbs(pegasus_t *pegasus)
 790{
 791	usb_free_urb(pegasus->intr_urb);
 792	usb_free_urb(pegasus->tx_urb);
 793	usb_free_urb(pegasus->rx_urb);
 794}
 795
 796static void unlink_all_urbs(pegasus_t *pegasus)
 797{
 798	usb_kill_urb(pegasus->intr_urb);
 799	usb_kill_urb(pegasus->tx_urb);
 800	usb_kill_urb(pegasus->rx_urb);
 801}
 802
 803static int alloc_urbs(pegasus_t *pegasus)
 804{
 805	int res = -ENOMEM;
 806
 807	pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 808	if (!pegasus->rx_urb) {
 809		return res;
 810	}
 811	pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 812	if (!pegasus->tx_urb) {
 813		usb_free_urb(pegasus->rx_urb);
 814		return res;
 815	}
 816	pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 817	if (!pegasus->intr_urb) {
 818		usb_free_urb(pegasus->tx_urb);
 819		usb_free_urb(pegasus->rx_urb);
 820		return res;
 821	}
 822
 823	return 0;
 824}
 825
 826static int pegasus_open(struct net_device *net)
 827{
 828	pegasus_t *pegasus = netdev_priv(net);
 829	int res=-ENOMEM;
 830
 831	if (pegasus->rx_skb == NULL)
 832		pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
 833							      PEGASUS_MTU,
 834							      GFP_KERNEL);
 835	if (!pegasus->rx_skb)
 836		goto exit;
 837
 838	res = set_registers(pegasus, EthID, 6, net->dev_addr);
 839
 840	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 841			  usb_rcvbulkpipe(pegasus->usb, 1),
 842			  pegasus->rx_skb->data, PEGASUS_MTU,
 843			  read_bulk_callback, pegasus);
 844	if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
 845		if (res == -ENODEV)
 846			netif_device_detach(pegasus->net);
 847		netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
 848		goto exit;
 849	}
 850
 851	usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
 852			 usb_rcvintpipe(pegasus->usb, 3),
 853			 pegasus->intr_buff, sizeof(pegasus->intr_buff),
 854			 intr_callback, pegasus, pegasus->intr_interval);
 855	if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
 856		if (res == -ENODEV)
 857			netif_device_detach(pegasus->net);
 858		netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
 859		usb_kill_urb(pegasus->rx_urb);
 860		goto exit;
 861	}
 862	res = enable_net_traffic(net, pegasus->usb);
 863	if (res < 0) {
 864		netif_dbg(pegasus, ifup, net,
 865			  "can't enable_net_traffic() - %d\n", res);
 866		res = -EIO;
 867		usb_kill_urb(pegasus->rx_urb);
 868		usb_kill_urb(pegasus->intr_urb);
 869		goto exit;
 870	}
 871	set_carrier(net);
 872	netif_start_queue(net);
 873	netif_dbg(pegasus, ifup, net, "open\n");
 874	res = 0;
 875exit:
 876	return res;
 877}
 878
 879static int pegasus_close(struct net_device *net)
 880{
 881	pegasus_t *pegasus = netdev_priv(net);
 882
 883	netif_stop_queue(net);
 884	if (!(pegasus->flags & PEGASUS_UNPLUG))
 885		disable_net_traffic(pegasus);
 886	tasklet_kill(&pegasus->rx_tl);
 887	unlink_all_urbs(pegasus);
 888
 889	return 0;
 890}
 891
 892static void pegasus_get_drvinfo(struct net_device *dev,
 893				struct ethtool_drvinfo *info)
 894{
 895	pegasus_t *pegasus = netdev_priv(dev);
 896
 897	strlcpy(info->driver, driver_name, sizeof(info->driver));
 898	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 899	usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
 900}
 901
 902/* also handles three patterns of some kind in hardware */
 903#define	WOL_SUPPORTED	(WAKE_MAGIC|WAKE_PHY)
 904
 905static void
 906pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 907{
 908	pegasus_t	*pegasus = netdev_priv(dev);
 909
 910	wol->supported = WAKE_MAGIC | WAKE_PHY;
 911	wol->wolopts = pegasus->wolopts;
 912}
 913
 914static int
 915pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 916{
 917	pegasus_t	*pegasus = netdev_priv(dev);
 918	u8		reg78 = 0x04;
 919	int		ret;
 920
 921	if (wol->wolopts & ~WOL_SUPPORTED)
 922		return -EINVAL;
 923
 924	if (wol->wolopts & WAKE_MAGIC)
 925		reg78 |= 0x80;
 926	if (wol->wolopts & WAKE_PHY)
 927		reg78 |= 0x40;
 928	/* FIXME this 0x10 bit still needs to get set in the chip... */
 929	if (wol->wolopts)
 930		pegasus->eth_regs[0] |= 0x10;
 931	else
 932		pegasus->eth_regs[0] &= ~0x10;
 933	pegasus->wolopts = wol->wolopts;
 934
 935	ret = set_register(pegasus, WakeupControl, reg78);
 936	if (!ret)
 937		ret = device_set_wakeup_enable(&pegasus->usb->dev,
 938						wol->wolopts);
 939	return ret;
 940}
 941
 942static inline void pegasus_reset_wol(struct net_device *dev)
 943{
 944	struct ethtool_wolinfo wol;
 945
 946	memset(&wol, 0, sizeof wol);
 947	(void) pegasus_set_wol(dev, &wol);
 948}
 949
 950static int
 951pegasus_get_link_ksettings(struct net_device *dev,
 952			   struct ethtool_link_ksettings *ecmd)
 953{
 954	pegasus_t *pegasus;
 955
 956	pegasus = netdev_priv(dev);
 957	mii_ethtool_get_link_ksettings(&pegasus->mii, ecmd);
 958	return 0;
 959}
 960
 961static int
 962pegasus_set_link_ksettings(struct net_device *dev,
 963			   const struct ethtool_link_ksettings *ecmd)
 964{
 965	pegasus_t *pegasus = netdev_priv(dev);
 966	return mii_ethtool_set_link_ksettings(&pegasus->mii, ecmd);
 967}
 968
 969static int pegasus_nway_reset(struct net_device *dev)
 970{
 971	pegasus_t *pegasus = netdev_priv(dev);
 972	return mii_nway_restart(&pegasus->mii);
 973}
 974
 975static u32 pegasus_get_link(struct net_device *dev)
 976{
 977	pegasus_t *pegasus = netdev_priv(dev);
 978	return mii_link_ok(&pegasus->mii);
 979}
 980
 981static u32 pegasus_get_msglevel(struct net_device *dev)
 982{
 983	pegasus_t *pegasus = netdev_priv(dev);
 984	return pegasus->msg_enable;
 985}
 986
 987static void pegasus_set_msglevel(struct net_device *dev, u32 v)
 988{
 989	pegasus_t *pegasus = netdev_priv(dev);
 990	pegasus->msg_enable = v;
 991}
 992
 993static const struct ethtool_ops ops = {
 994	.get_drvinfo = pegasus_get_drvinfo,
 
 
 995	.nway_reset = pegasus_nway_reset,
 996	.get_link = pegasus_get_link,
 997	.get_msglevel = pegasus_get_msglevel,
 998	.set_msglevel = pegasus_set_msglevel,
 999	.get_wol = pegasus_get_wol,
1000	.set_wol = pegasus_set_wol,
1001	.get_link_ksettings = pegasus_get_link_ksettings,
1002	.set_link_ksettings = pegasus_set_link_ksettings,
1003};
1004
1005static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1006{
1007	__u16 *data = (__u16 *) &rq->ifr_ifru;
1008	pegasus_t *pegasus = netdev_priv(net);
1009	int res;
1010
1011	switch (cmd) {
1012	case SIOCDEVPRIVATE:
1013		data[0] = pegasus->phy;
1014	case SIOCDEVPRIVATE + 1:
1015		read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1016		res = 0;
1017		break;
1018	case SIOCDEVPRIVATE + 2:
1019		if (!capable(CAP_NET_ADMIN))
1020			return -EPERM;
1021		write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
1022		res = 0;
1023		break;
1024	default:
1025		res = -EOPNOTSUPP;
1026	}
1027	return res;
1028}
1029
1030static void pegasus_set_multicast(struct net_device *net)
1031{
1032	pegasus_t *pegasus = netdev_priv(net);
1033
1034	if (net->flags & IFF_PROMISC) {
1035		pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1036		netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1037	} else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1038		pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1039		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1040		netif_dbg(pegasus, link, net, "set allmulti\n");
1041	} else {
1042		pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1043		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1044	}
1045	update_eth_regs_async(pegasus);
1046}
1047
1048static __u8 mii_phy_probe(pegasus_t *pegasus)
1049{
1050	int i;
1051	__u16 tmp;
1052
1053	for (i = 0; i < 32; i++) {
1054		read_mii_word(pegasus, i, MII_BMSR, &tmp);
1055		if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1056			continue;
1057		else
1058			return i;
1059	}
1060
1061	return 0xff;
1062}
1063
1064static inline void setup_pegasus_II(pegasus_t *pegasus)
1065{
1066	__u8 data = 0xa5;
1067
1068	set_register(pegasus, Reg1d, 0);
1069	set_register(pegasus, Reg7b, 1);
1070	mdelay(100);
1071	if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1072		set_register(pegasus, Reg7b, 0);
1073	else
1074		set_register(pegasus, Reg7b, 2);
1075
1076	set_register(pegasus, 0x83, data);
1077	get_registers(pegasus, 0x83, 1, &data);
1078
1079	if (data == 0xa5)
1080		pegasus->chip = 0x8513;
1081	else
1082		pegasus->chip = 0;
1083
1084	set_register(pegasus, 0x80, 0xc0);
1085	set_register(pegasus, 0x83, 0xff);
1086	set_register(pegasus, 0x84, 0x01);
1087
1088	if (pegasus->features & HAS_HOME_PNA && mii_mode)
1089		set_register(pegasus, Reg81, 6);
1090	else
1091		set_register(pegasus, Reg81, 2);
1092}
1093
1094
1095static int pegasus_count;
1096static struct workqueue_struct *pegasus_workqueue;
1097#define CARRIER_CHECK_DELAY (2 * HZ)
1098
1099static void check_carrier(struct work_struct *work)
1100{
1101	pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1102	set_carrier(pegasus->net);
1103	if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1104		queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1105			CARRIER_CHECK_DELAY);
1106	}
1107}
1108
1109static int pegasus_blacklisted(struct usb_device *udev)
1110{
1111	struct usb_device_descriptor *udd = &udev->descriptor;
1112
1113	/* Special quirk to keep the driver from handling the Belkin Bluetooth
1114	 * dongle which happens to have the same ID.
1115	 */
1116	if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1117	    (udd->idProduct == cpu_to_le16(0x0121)) &&
1118	    (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1119	    (udd->bDeviceProtocol == 1))
1120		return 1;
1121
1122	return 0;
1123}
1124
1125/* we rely on probe() and remove() being serialized so we
1126 * don't need extra locking on pegasus_count.
1127 */
1128static void pegasus_dec_workqueue(void)
1129{
1130	pegasus_count--;
1131	if (pegasus_count == 0) {
1132		destroy_workqueue(pegasus_workqueue);
1133		pegasus_workqueue = NULL;
1134	}
1135}
1136
1137static int pegasus_probe(struct usb_interface *intf,
1138			 const struct usb_device_id *id)
1139{
1140	struct usb_device *dev = interface_to_usbdev(intf);
1141	struct net_device *net;
1142	pegasus_t *pegasus;
1143	int dev_index = id - pegasus_ids;
1144	int res = -ENOMEM;
1145
1146	if (pegasus_blacklisted(dev))
1147		return -ENODEV;
1148
1149	if (pegasus_count == 0) {
1150		pegasus_workqueue = alloc_workqueue("pegasus", WQ_MEM_RECLAIM,
1151						    0);
1152		if (!pegasus_workqueue)
1153			return -ENOMEM;
1154	}
1155	pegasus_count++;
1156
1157	net = alloc_etherdev(sizeof(struct pegasus));
1158	if (!net)
1159		goto out;
1160
1161	pegasus = netdev_priv(net);
1162	pegasus->dev_index = dev_index;
1163
1164	res = alloc_urbs(pegasus);
1165	if (res < 0) {
1166		dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1167		goto out1;
1168	}
1169
1170	tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1171
1172	INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1173
1174	pegasus->intf = intf;
1175	pegasus->usb = dev;
1176	pegasus->net = net;
1177
1178
1179	net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1180	net->netdev_ops = &pegasus_netdev_ops;
1181	net->ethtool_ops = &ops;
1182	pegasus->mii.dev = net;
1183	pegasus->mii.mdio_read = mdio_read;
1184	pegasus->mii.mdio_write = mdio_write;
1185	pegasus->mii.phy_id_mask = 0x1f;
1186	pegasus->mii.reg_num_mask = 0x1f;
1187	pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1188				| NETIF_MSG_PROBE | NETIF_MSG_LINK);
1189
1190	pegasus->features = usb_dev_id[dev_index].private;
1191	get_interrupt_interval(pegasus);
1192	if (reset_mac(pegasus)) {
1193		dev_err(&intf->dev, "can't reset MAC\n");
1194		res = -EIO;
1195		goto out2;
1196	}
1197	set_ethernet_addr(pegasus);
1198	if (pegasus->features & PEGASUS_II) {
1199		dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1200		setup_pegasus_II(pegasus);
1201	}
1202	pegasus->phy = mii_phy_probe(pegasus);
1203	if (pegasus->phy == 0xff) {
1204		dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1205		pegasus->phy = 1;
1206	}
1207	pegasus->mii.phy_id = pegasus->phy;
1208	usb_set_intfdata(intf, pegasus);
1209	SET_NETDEV_DEV(net, &intf->dev);
1210	pegasus_reset_wol(net);
1211	res = register_netdev(net);
1212	if (res)
1213		goto out3;
1214	queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1215			   CARRIER_CHECK_DELAY);
1216	dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
1217		 usb_dev_id[dev_index].name, net->dev_addr);
1218	return 0;
1219
1220out3:
1221	usb_set_intfdata(intf, NULL);
1222out2:
1223	free_all_urbs(pegasus);
1224out1:
1225	free_netdev(net);
1226out:
1227	pegasus_dec_workqueue();
1228	return res;
1229}
1230
1231static void pegasus_disconnect(struct usb_interface *intf)
1232{
1233	struct pegasus *pegasus = usb_get_intfdata(intf);
1234
1235	usb_set_intfdata(intf, NULL);
1236	if (!pegasus) {
1237		dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1238		return;
1239	}
1240
1241	pegasus->flags |= PEGASUS_UNPLUG;
1242	cancel_delayed_work(&pegasus->carrier_check);
1243	unregister_netdev(pegasus->net);
1244	unlink_all_urbs(pegasus);
1245	free_all_urbs(pegasus);
1246	if (pegasus->rx_skb != NULL) {
1247		dev_kfree_skb(pegasus->rx_skb);
1248		pegasus->rx_skb = NULL;
1249	}
1250	free_netdev(pegasus->net);
1251	pegasus_dec_workqueue();
1252}
1253
1254static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1255{
1256	struct pegasus *pegasus = usb_get_intfdata(intf);
1257
1258	netif_device_detach(pegasus->net);
1259	cancel_delayed_work(&pegasus->carrier_check);
1260	if (netif_running(pegasus->net)) {
1261		usb_kill_urb(pegasus->rx_urb);
1262		usb_kill_urb(pegasus->intr_urb);
1263	}
1264	return 0;
1265}
1266
1267static int pegasus_resume(struct usb_interface *intf)
1268{
1269	struct pegasus *pegasus = usb_get_intfdata(intf);
1270
1271	netif_device_attach(pegasus->net);
1272	if (netif_running(pegasus->net)) {
1273		pegasus->rx_urb->status = 0;
1274		pegasus->rx_urb->actual_length = 0;
1275		read_bulk_callback(pegasus->rx_urb);
1276
1277		pegasus->intr_urb->status = 0;
1278		pegasus->intr_urb->actual_length = 0;
1279		intr_callback(pegasus->intr_urb);
1280	}
1281	queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1282				CARRIER_CHECK_DELAY);
1283	return 0;
1284}
1285
1286static const struct net_device_ops pegasus_netdev_ops = {
1287	.ndo_open =			pegasus_open,
1288	.ndo_stop =			pegasus_close,
1289	.ndo_do_ioctl =			pegasus_ioctl,
1290	.ndo_start_xmit =		pegasus_start_xmit,
1291	.ndo_set_rx_mode =		pegasus_set_multicast,
 
1292	.ndo_tx_timeout =		pegasus_tx_timeout,
1293	.ndo_set_mac_address =		eth_mac_addr,
1294	.ndo_validate_addr =		eth_validate_addr,
1295};
1296
1297static struct usb_driver pegasus_driver = {
1298	.name = driver_name,
1299	.probe = pegasus_probe,
1300	.disconnect = pegasus_disconnect,
1301	.id_table = pegasus_ids,
1302	.suspend = pegasus_suspend,
1303	.resume = pegasus_resume,
1304	.disable_hub_initiated_lpm = 1,
1305};
1306
1307static void __init parse_id(char *id)
1308{
1309	unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1310	char *token, *name = NULL;
1311
1312	if ((token = strsep(&id, ":")) != NULL)
1313		name = token;
1314	/* name now points to a null terminated string*/
1315	if ((token = strsep(&id, ":")) != NULL)
1316		vendor_id = simple_strtoul(token, NULL, 16);
1317	if ((token = strsep(&id, ":")) != NULL)
1318		device_id = simple_strtoul(token, NULL, 16);
1319	flags = simple_strtoul(id, NULL, 16);
1320	pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1321		driver_name, name, vendor_id, device_id, flags);
1322
1323	if (vendor_id > 0x10000 || vendor_id == 0)
1324		return;
1325	if (device_id > 0x10000 || device_id == 0)
1326		return;
1327
1328	for (i = 0; usb_dev_id[i].name; i++);
1329	usb_dev_id[i].name = name;
1330	usb_dev_id[i].vendor = vendor_id;
1331	usb_dev_id[i].device = device_id;
1332	usb_dev_id[i].private = flags;
1333	pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1334	pegasus_ids[i].idVendor = vendor_id;
1335	pegasus_ids[i].idProduct = device_id;
1336}
1337
1338static int __init pegasus_init(void)
1339{
1340	pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1341	if (devid)
1342		parse_id(devid);
1343	return usb_register(&pegasus_driver);
1344}
1345
1346static void __exit pegasus_exit(void)
1347{
1348	usb_deregister(&pegasus_driver);
1349}
1350
1351module_init(pegasus_init);
1352module_exit(pegasus_exit);