1/*
   2 *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   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
  31#include <linux/sched.h>
  32#include <linux/slab.h>
  33#include <linux/init.h>
  34#include <linux/delay.h>
  35#include <linux/netdevice.h>
  36#include <linux/etherdevice.h>
  37#include <linux/ethtool.h>
  38#include <linux/mii.h>
  39#include <linux/usb.h>
  40#include <linux/module.h>
  41#include <asm/byteorder.h>
  42#include <asm/uaccess.h>
  43#include "pegasus.h"
  44
  45/*
  46 * Version Information
  47 */
  48#define DRIVER_VERSION "v0.6.14 (2006/09/27)"
  49#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  50#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  51
  52static const char driver_name[] = "pegasus";
  53
  54#undef	PEGASUS_WRITE_EEPROM
  55#define	BMSR_MEDIA	(BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  56			BMSR_100FULL | BMSR_ANEGCAPABLE)
  57
  58static int loopback;
  59static int mii_mode;
  60static char *devid;
  61
  62static struct usb_eth_dev usb_dev_id[] = {
  63#define	PEGASUS_DEV(pn, vid, pid, flags)	\
  64	{.name = pn, .vendor = vid, .device = pid, .private = flags},
  65#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
  66	PEGASUS_DEV(pn, vid, pid, flags)
  67#include "pegasus.h"
  68#undef	PEGASUS_DEV
  69#undef	PEGASUS_DEV_CLASS
  70	{NULL, 0, 0, 0},
  71	{NULL, 0, 0, 0}
  72};
  73
  74static struct usb_device_id pegasus_ids[] = {
  75#define	PEGASUS_DEV(pn, vid, pid, flags) \
  76	{.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  77/*
  78 * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
  79 * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
  80 * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
  81 * case anyway, seeing as the pegasus is for "Wired" adaptors.
  82 */
  83#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
  84	{.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
  85	.idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
  86#include "pegasus.h"
  87#undef	PEGASUS_DEV
  88#undef	PEGASUS_DEV_CLASS
  89	{},
  90	{}
  91};
  92
  93MODULE_AUTHOR(DRIVER_AUTHOR);
  94MODULE_DESCRIPTION(DRIVER_DESC);
  95MODULE_LICENSE("GPL");
  96module_param(loopback, bool, 0);
  97module_param(mii_mode, bool, 0);
  98module_param(devid, charp, 0);
  99MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
 100MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
 101MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
 102
 103/* use ethtool to change the level for any given device */
 104static int msg_level = -1;
 105module_param(msg_level, int, 0);
 106MODULE_PARM_DESC(msg_level, "Override default message level");
 107
 108MODULE_DEVICE_TABLE(usb, pegasus_ids);
 109static const struct net_device_ops pegasus_netdev_ops;
 110
 111static int update_eth_regs_async(pegasus_t *);
 112/* Aargh!!! I _really_ hate such tweaks */
 113static void ctrl_callback(struct urb *urb)
 114{
 115	pegasus_t *pegasus = urb->context;
 116	int status = urb->status;
 117
 118	if (!pegasus)
 119		return;
 120
 121	switch (status) {
 122	case 0:
 123		if (pegasus->flags & ETH_REGS_CHANGE) {
 124			pegasus->flags &= ~ETH_REGS_CHANGE;
 125			pegasus->flags |= ETH_REGS_CHANGED;
 126			update_eth_regs_async(pegasus);
 127			return;
 128		}
 129		break;
 130	case -EINPROGRESS:
 131		return;
 132	case -ENOENT:
 133		break;
 134	default:
 135		if (net_ratelimit())
 136			netif_dbg(pegasus, drv, pegasus->net,
 137				  "%s, status %d\n", __func__, status);
 138		break;
 139	}
 140	pegasus->flags &= ~ETH_REGS_CHANGED;
 141	wake_up(&pegasus->ctrl_wait);
 142}
 143
 144static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
 145			 void *data)
 146{
 147	int ret;
 148	char *buffer;
 149	DECLARE_WAITQUEUE(wait, current);
 150
 151	buffer = kmalloc(size, GFP_KERNEL);
 152	if (!buffer) {
 153		netif_warn(pegasus, drv, pegasus->net,
 154			   "out of memory in %s\n", __func__);
 155		return -ENOMEM;
 156	}
 157	add_wait_queue(&pegasus->ctrl_wait, &wait);
 158	set_current_state(TASK_UNINTERRUPTIBLE);
 159	while (pegasus->flags & ETH_REGS_CHANGED)
 160		schedule();
 161	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 162	set_current_state(TASK_RUNNING);
 163
 164	pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 165	pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 166	pegasus->dr.wValue = cpu_to_le16(0);
 167	pegasus->dr.wIndex = cpu_to_le16(indx);
 168	pegasus->dr.wLength = cpu_to_le16(size);
 169	pegasus->ctrl_urb->transfer_buffer_length = size;
 170
 171	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 172			     usb_rcvctrlpipe(pegasus->usb, 0),
 173			     (char *) &pegasus->dr,
 174			     buffer, size, ctrl_callback, pegasus);
 175
 176	add_wait_queue(&pegasus->ctrl_wait, &wait);
 177	set_current_state(TASK_UNINTERRUPTIBLE);
 178
 179	/* using ATOMIC, we'd never wake up if we slept */
 180	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 181		set_current_state(TASK_RUNNING);
 182		if (ret == -ENODEV)
 183			netif_device_detach(pegasus->net);
 184		if (net_ratelimit())
 185			netif_err(pegasus, drv, pegasus->net,
 186				  "%s, status %d\n", __func__, ret);
 187		goto out;
 188	}
 189
 190	schedule();
 191out:
 192	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 193	memcpy(data, buffer, size);
 194	kfree(buffer);
 195
 196	return ret;
 197}
 198
 199static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
 200			 void *data)
 201{
 202	int ret;
 203	char *buffer;
 204	DECLARE_WAITQUEUE(wait, current);
 205
 206	buffer = kmemdup(data, size, GFP_KERNEL);
 207	if (!buffer) {
 208		netif_warn(pegasus, drv, pegasus->net,
 209			   "out of memory in %s\n", __func__);
 210		return -ENOMEM;
 211	}
 212
 213	add_wait_queue(&pegasus->ctrl_wait, &wait);
 214	set_current_state(TASK_UNINTERRUPTIBLE);
 215	while (pegasus->flags & ETH_REGS_CHANGED)
 216		schedule();
 217	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 218	set_current_state(TASK_RUNNING);
 219
 220	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 221	pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 222	pegasus->dr.wValue = cpu_to_le16(0);
 223	pegasus->dr.wIndex = cpu_to_le16(indx);
 224	pegasus->dr.wLength = cpu_to_le16(size);
 225	pegasus->ctrl_urb->transfer_buffer_length = size;
 226
 227	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 228			     usb_sndctrlpipe(pegasus->usb, 0),
 229			     (char *) &pegasus->dr,
 230			     buffer, size, ctrl_callback, pegasus);
 231
 232	add_wait_queue(&pegasus->ctrl_wait, &wait);
 233	set_current_state(TASK_UNINTERRUPTIBLE);
 234
 235	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 236		if (ret == -ENODEV)
 237			netif_device_detach(pegasus->net);
 238		netif_err(pegasus, drv, pegasus->net,
 239			  "%s, status %d\n", __func__, ret);
 240		goto out;
 241	}
 242
 243	schedule();
 244out:
 245	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 246	kfree(buffer);
 247
 248	return ret;
 249}
 250
 251static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
 252{
 253	int ret;
 254	char *tmp;
 255	DECLARE_WAITQUEUE(wait, current);
 256
 257	tmp = kmemdup(&data, 1, GFP_KERNEL);
 258	if (!tmp) {
 259		netif_warn(pegasus, drv, pegasus->net,
 260			   "out of memory in %s\n", __func__);
 261		return -ENOMEM;
 262	}
 263	add_wait_queue(&pegasus->ctrl_wait, &wait);
 264	set_current_state(TASK_UNINTERRUPTIBLE);
 265	while (pegasus->flags & ETH_REGS_CHANGED)
 266		schedule();
 267	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 268	set_current_state(TASK_RUNNING);
 269
 270	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 271	pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 272	pegasus->dr.wValue = cpu_to_le16(data);
 273	pegasus->dr.wIndex = cpu_to_le16(indx);
 274	pegasus->dr.wLength = cpu_to_le16(1);
 275	pegasus->ctrl_urb->transfer_buffer_length = 1;
 276
 277	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 278			     usb_sndctrlpipe(pegasus->usb, 0),
 279			     (char *) &pegasus->dr,
 280			     tmp, 1, ctrl_callback, pegasus);
 281
 282	add_wait_queue(&pegasus->ctrl_wait, &wait);
 283	set_current_state(TASK_UNINTERRUPTIBLE);
 284
 285	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 286		if (ret == -ENODEV)
 287			netif_device_detach(pegasus->net);
 288		if (net_ratelimit())
 289			netif_err(pegasus, drv, pegasus->net,
 290				  "%s, status %d\n", __func__, ret);
 291		goto out;
 292	}
 293
 294	schedule();
 295out:
 296	remove_wait_queue(&pegasus->ctrl_wait, &wait);
 297	kfree(tmp);
 298
 299	return ret;
 300}
 301
 302static int update_eth_regs_async(pegasus_t *pegasus)
 303{
 304	int ret;
 305
 306	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 307	pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 308	pegasus->dr.wValue = cpu_to_le16(0);
 309	pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 310	pegasus->dr.wLength = cpu_to_le16(3);
 311	pegasus->ctrl_urb->transfer_buffer_length = 3;
 312
 313	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 314			     usb_sndctrlpipe(pegasus->usb, 0),
 315			     (char *) &pegasus->dr,
 316			     pegasus->eth_regs, 3, ctrl_callback, pegasus);
 317
 318	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 319		if (ret == -ENODEV)
 320			netif_device_detach(pegasus->net);
 321		netif_err(pegasus, drv, pegasus->net,
 322			  "%s, status %d\n", __func__, ret);
 323	}
 324
 325	return ret;
 326}
 327
 328/* Returns 0 on success, error on failure */
 329static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
 330{
 331	int i;
 332	__u8 data[4] = { phy, 0, 0, indx };
 333	__le16 regdi;
 334	int ret;
 335
 336	set_register(pegasus, PhyCtrl, 0);
 337	set_registers(pegasus, PhyAddr, sizeof(data), data);
 338	set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 339	for (i = 0; i < REG_TIMEOUT; i++) {
 340		ret = get_registers(pegasus, PhyCtrl, 1, data);
 341		if (ret == -ESHUTDOWN)
 342			goto fail;
 343		if (data[0] & PHY_DONE)
 344			break;
 345	}
 346
 347	if (i >= REG_TIMEOUT)
 348		goto fail;
 349
 350	ret = get_registers(pegasus, PhyData, 2, &regdi);
 351	*regd = le16_to_cpu(regdi);
 352	return ret;
 353
 354fail:
 355	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 356
 357	return ret;
 358}
 359
 360static int mdio_read(struct net_device *dev, int phy_id, int loc)
 361{
 362	pegasus_t *pegasus = netdev_priv(dev);
 363	u16 res;
 364
 365	read_mii_word(pegasus, phy_id, loc, &res);
 366	return (int)res;
 367}
 368
 369static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 regd)
 370{
 371	int i;
 372	__u8 data[4] = { phy, 0, 0, indx };
 373	int ret;
 374
 375	data[1] = (u8) regd;
 376	data[2] = (u8) (regd >> 8);
 377	set_register(pegasus, PhyCtrl, 0);
 378	set_registers(pegasus, PhyAddr, sizeof(data), data);
 379	set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 380	for (i = 0; i < REG_TIMEOUT; i++) {
 381		ret = get_registers(pegasus, PhyCtrl, 1, data);
 382		if (ret == -ESHUTDOWN)
 383			goto fail;
 384		if (data[0] & PHY_DONE)
 385			break;
 386	}
 387
 388	if (i >= REG_TIMEOUT)
 389		goto fail;
 390
 391	return ret;
 392
 393fail:
 394	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 395	return -ETIMEDOUT;
 396}
 397
 398static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 399{
 400	pegasus_t *pegasus = netdev_priv(dev);
 401
 402	write_mii_word(pegasus, phy_id, loc, val);
 403}
 404
 405static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
 406{
 407	int i;
 408	__u8 tmp;
 409	__le16 retdatai;
 410	int ret;
 411
 412	set_register(pegasus, EpromCtrl, 0);
 413	set_register(pegasus, EpromOffset, index);
 414	set_register(pegasus, EpromCtrl, EPROM_READ);
 415
 416	for (i = 0; i < REG_TIMEOUT; i++) {
 417		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 418		if (tmp & EPROM_DONE)
 419			break;
 420		if (ret == -ESHUTDOWN)
 421			goto fail;
 422	}
 423	if (i >= REG_TIMEOUT)
 424		goto fail;
 425
 426	ret = get_registers(pegasus, EpromData, 2, &retdatai);
 427	*retdata = le16_to_cpu(retdatai);
 428	return ret;
 429
 430fail:
 431	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 432	return -ETIMEDOUT;
 433}
 434
 435#ifdef	PEGASUS_WRITE_EEPROM
 436static inline void enable_eprom_write(pegasus_t *pegasus)
 437{
 438	__u8 tmp;
 439	int ret;
 440
 441	get_registers(pegasus, EthCtrl2, 1, &tmp);
 442	set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 443}
 444
 445static inline void disable_eprom_write(pegasus_t *pegasus)
 446{
 447	__u8 tmp;
 448	int ret;
 449
 450	get_registers(pegasus, EthCtrl2, 1, &tmp);
 451	set_register(pegasus, EpromCtrl, 0);
 452	set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 453}
 454
 455static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
 456{
 457	int i;
 458	__u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 459	int ret;
 460	__le16 le_data = cpu_to_le16(data);
 461
 462	set_registers(pegasus, EpromOffset, 4, d);
 463	enable_eprom_write(pegasus);
 464	set_register(pegasus, EpromOffset, index);
 465	set_registers(pegasus, EpromData, 2, &le_data);
 466	set_register(pegasus, EpromCtrl, EPROM_WRITE);
 467
 468	for (i = 0; i < REG_TIMEOUT; i++) {
 469		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 470		if (ret == -ESHUTDOWN)
 471			goto fail;
 472		if (tmp & EPROM_DONE)
 473			break;
 474	}
 475	disable_eprom_write(pegasus);
 476	if (i >= REG_TIMEOUT)
 477		goto fail;
 478
 479	return ret;
 480
 481fail:
 482	netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
 483	return -ETIMEDOUT;
 484}
 485#endif				/* PEGASUS_WRITE_EEPROM */
 486
 487static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
 488{
 489	int i;
 490	__u16 w16;
 491
 492	for (i = 0; i < 3; i++) {
 493		read_eprom_word(pegasus, i, &w16);
 494		((__le16 *) id)[i] = cpu_to_le16(w16);
 495	}
 496}
 497
 498static void set_ethernet_addr(pegasus_t *pegasus)
 499{
 500	__u8 node_id[6];
 501
 502	if (pegasus->features & PEGASUS_II) {
 503		get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 504	} else {
 505		get_node_id(pegasus, node_id);
 506		set_registers(pegasus, EthID, sizeof(node_id), node_id);
 507	}
 508	memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
 509}
 510
 511static inline int reset_mac(pegasus_t *pegasus)
 512{
 513	__u8 data = 0x8;
 514	int i;
 515
 516	set_register(pegasus, EthCtrl1, data);
 517	for (i = 0; i < REG_TIMEOUT; i++) {
 518		get_registers(pegasus, EthCtrl1, 1, &data);
 519		if (~data & 0x08) {
 520			if (loopback & 1)
 521				break;
 522			if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 523				set_register(pegasus, Gpio1, 0x34);
 524			else
 525				set_register(pegasus, Gpio1, 0x26);
 526			set_register(pegasus, Gpio0, pegasus->features);
 527			set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 528			break;
 529		}
 530	}
 531	if (i == REG_TIMEOUT)
 532		return -ETIMEDOUT;
 533
 534	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 535	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 536		set_register(pegasus, Gpio0, 0x24);
 537		set_register(pegasus, Gpio0, 0x26);
 538	}
 539	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 540		__u16 auxmode;
 541		read_mii_word(pegasus, 3, 0x1b, &auxmode);
 542		write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 543	}
 544
 545	return 0;
 546}
 547
 548static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 549{
 550	__u16 linkpart;
 551	__u8 data[4];
 552	pegasus_t *pegasus = netdev_priv(dev);
 553	int ret;
 554
 555	read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 556	data[0] = 0xc9;
 557	data[1] = 0;
 558	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 559		data[1] |= 0x20;	/* set full duplex */
 560	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 561		data[1] |= 0x10;	/* set 100 Mbps */
 562	if (mii_mode)
 563		data[1] = 0;
 564	data[2] = (loopback & 1) ? 0x09 : 0x01;
 565
 566	memcpy(pegasus->eth_regs, data, sizeof(data));
 567	ret = set_registers(pegasus, EthCtrl0, 3, data);
 568
 569	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 570	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 571	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 572		u16 auxmode;
 573		read_mii_word(pegasus, 0, 0x1b, &auxmode);
 574		write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 575	}
 576
 577	return ret;
 578}
 579
 580static void fill_skb_pool(pegasus_t *pegasus)
 581{
 582	int i;
 583
 584	for (i = 0; i < RX_SKBS; i++) {
 585		if (pegasus->rx_pool[i])
 586			continue;
 587		pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 588		/*
 589		 ** we give up if the allocation fail. the tasklet will be
 590		 ** rescheduled again anyway...
 591		 */
 592		if (pegasus->rx_pool[i] == NULL)
 593			return;
 594		skb_reserve(pegasus->rx_pool[i], 2);
 595	}
 596}
 597
 598static void free_skb_pool(pegasus_t *pegasus)
 599{
 600	int i;
 601
 602	for (i = 0; i < RX_SKBS; i++) {
 603		if (pegasus->rx_pool[i]) {
 604			dev_kfree_skb(pegasus->rx_pool[i]);
 605			pegasus->rx_pool[i] = NULL;
 606		}
 607	}
 608}
 609
 610static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 611{
 612	int i;
 613	struct sk_buff *skb;
 614
 615	for (i = 0; i < RX_SKBS; i++) {
 616		if (likely(pegasus->rx_pool[i] != NULL)) {
 617			skb = pegasus->rx_pool[i];
 618			pegasus->rx_pool[i] = NULL;
 619			return skb;
 620		}
 621	}
 622	return NULL;
 623}
 624
 625static void read_bulk_callback(struct urb *urb)
 626{
 627	pegasus_t *pegasus = urb->context;
 628	struct net_device *net;
 629	int rx_status, count = urb->actual_length;
 630	int status = urb->status;
 631	u8 *buf = urb->transfer_buffer;
 632	__u16 pkt_len;
 633
 634	if (!pegasus)
 635		return;
 636
 637	net = pegasus->net;
 638	if (!netif_device_present(net) || !netif_running(net))
 639		return;
 640
 641	switch (status) {
 642	case 0:
 643		break;
 644	case -ETIME:
 645		netif_dbg(pegasus, rx_err, net, "reset MAC\n");
 646		pegasus->flags &= ~PEGASUS_RX_BUSY;
 647		break;
 648	case -EPIPE:		/* stall, or disconnect from TT */
 649		/* FIXME schedule work to clear the halt */
 650		netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
 651		return;
 652	case -ENOENT:
 653	case -ECONNRESET:
 654	case -ESHUTDOWN:
 655		netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
 656		return;
 657	default:
 658		netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
 659		goto goon;
 660	}
 661
 662	if (!count || count < 4)
 663		goto goon;
 664
 665	rx_status = buf[count - 2];
 666	if (rx_status & 0x1e) {
 667		netif_dbg(pegasus, rx_err, net,
 668			  "RX packet error %x\n", rx_status);
 669		pegasus->stats.rx_errors++;
 670		if (rx_status & 0x06)	/* long or runt	*/
 671			pegasus->stats.rx_length_errors++;
 672		if (rx_status & 0x08)
 673			pegasus->stats.rx_crc_errors++;
 674		if (rx_status & 0x10)	/* extra bits	*/
 675			pegasus->stats.rx_frame_errors++;
 676		goto goon;
 677	}
 678	if (pegasus->chip == 0x8513) {
 679		pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 680		pkt_len &= 0x0fff;
 681		pegasus->rx_skb->data += 2;
 682	} else {
 683		pkt_len = buf[count - 3] << 8;
 684		pkt_len += buf[count - 4];
 685		pkt_len &= 0xfff;
 686		pkt_len -= 8;
 687	}
 688
 689	/*
 690	 * If the packet is unreasonably long, quietly drop it rather than
 691	 * kernel panicing by calling skb_put.
 692	 */
 693	if (pkt_len > PEGASUS_MTU)
 694		goto goon;
 695
 696	/*
 697	 * at this point we are sure pegasus->rx_skb != NULL
 698	 * so we go ahead and pass up the packet.
 699	 */
 700	skb_put(pegasus->rx_skb, pkt_len);
 701	pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 702	netif_rx(pegasus->rx_skb);
 703	pegasus->stats.rx_packets++;
 704	pegasus->stats.rx_bytes += pkt_len;
 705
 706	if (pegasus->flags & PEGASUS_UNPLUG)
 707		return;
 708
 709	spin_lock(&pegasus->rx_pool_lock);
 710	pegasus->rx_skb = pull_skb(pegasus);
 711	spin_unlock(&pegasus->rx_pool_lock);
 712
 713	if (pegasus->rx_skb == NULL)
 714		goto tl_sched;
 715goon:
 716	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 717			  usb_rcvbulkpipe(pegasus->usb, 1),
 718			  pegasus->rx_skb->data, PEGASUS_MTU + 8,
 719			  read_bulk_callback, pegasus);
 720	rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 721	if (rx_status == -ENODEV)
 722		netif_device_detach(pegasus->net);
 723	else if (rx_status) {
 724		pegasus->flags |= PEGASUS_RX_URB_FAIL;
 725		goto tl_sched;
 726	} else {
 727		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 728	}
 729
 730	return;
 731
 732tl_sched:
 733	tasklet_schedule(&pegasus->rx_tl);
 734}
 735
 736static void rx_fixup(unsigned long data)
 737{
 738	pegasus_t *pegasus;
 739	unsigned long flags;
 740	int status;
 741
 742	pegasus = (pegasus_t *) data;
 743	if (pegasus->flags & PEGASUS_UNPLUG)
 744		return;
 745
 746	spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 747	fill_skb_pool(pegasus);
 748	if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 749		if (pegasus->rx_skb)
 750			goto try_again;
 751	if (pegasus->rx_skb == NULL)
 752		pegasus->rx_skb = pull_skb(pegasus);
 753	if (pegasus->rx_skb == NULL) {
 754		netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
 755		tasklet_schedule(&pegasus->rx_tl);
 756		goto done;
 757	}
 758	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 759			  usb_rcvbulkpipe(pegasus->usb, 1),
 760			  pegasus->rx_skb->data, PEGASUS_MTU + 8,
 761			  read_bulk_callback, pegasus);
 762try_again:
 763	status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 764	if (status == -ENODEV)
 765		netif_device_detach(pegasus->net);
 766	else if (status) {
 767		pegasus->flags |= PEGASUS_RX_URB_FAIL;
 768		tasklet_schedule(&pegasus->rx_tl);
 769	} else {
 770		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 771	}
 772done:
 773	spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 774}
 775
 776static void write_bulk_callback(struct urb *urb)
 777{
 778	pegasus_t *pegasus = urb->context;
 779	struct net_device *net;
 780	int status = urb->status;
 781
 782	if (!pegasus)
 783		return;
 784
 785	net = pegasus->net;
 786
 787	if (!netif_device_present(net) || !netif_running(net))
 788		return;
 789
 790	switch (status) {
 791	case -EPIPE:
 792		/* FIXME schedule_work() to clear the tx halt */
 793		netif_stop_queue(net);
 794		netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
 795		return;
 796	case -ENOENT:
 797	case -ECONNRESET:
 798	case -ESHUTDOWN:
 799		netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
 800		return;
 801	default:
 802		netif_info(pegasus, tx_err, net, "TX status %d\n", status);
 803		/* FALL THROUGH */
 804	case 0:
 805		break;
 806	}
 807
 808	net->trans_start = jiffies; /* prevent tx timeout */
 809	netif_wake_queue(net);
 810}
 811
 812static void intr_callback(struct urb *urb)
 813{
 814	pegasus_t *pegasus = urb->context;
 815	struct net_device *net;
 816	int res, status = urb->status;
 817
 818	if (!pegasus)
 819		return;
 820	net = pegasus->net;
 821
 822	switch (status) {
 823	case 0:
 824		break;
 825	case -ECONNRESET:	/* unlink */
 826	case -ENOENT:
 827	case -ESHUTDOWN:
 828		return;
 829	default:
 830		/* some Pegasus-I products report LOTS of data
 831		 * toggle errors... avoid log spamming
 832		 */
 833		netif_dbg(pegasus, timer, net, "intr status %d\n", status);
 834	}
 835
 836	if (urb->actual_length >= 6) {
 837		u8 *d = urb->transfer_buffer;
 838
 839		/* byte 0 == tx_status1, reg 2B */
 840		if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 841					|LATE_COL|JABBER_TIMEOUT)) {
 842			pegasus->stats.tx_errors++;
 843			if (d[0] & TX_UNDERRUN)
 844				pegasus->stats.tx_fifo_errors++;
 845			if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 846				pegasus->stats.tx_aborted_errors++;
 847			if (d[0] & LATE_COL)
 848				pegasus->stats.tx_window_errors++;
 849		}
 850
 851		/* d[5].LINK_STATUS lies on some adapters.
 852		 * d[0].NO_CARRIER kicks in only with failed TX.
 853		 * ... so monitoring with MII may be safest.
 854		 */
 855
 856		/* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 857		pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 858	}
 859
 860	res = usb_submit_urb(urb, GFP_ATOMIC);
 861	if (res == -ENODEV)
 862		netif_device_detach(pegasus->net);
 863	if (res)
 864		netif_err(pegasus, timer, net,
 865			  "can't resubmit interrupt urb, %d\n", res);
 866}
 867
 868static void pegasus_tx_timeout(struct net_device *net)
 869{
 870	pegasus_t *pegasus = netdev_priv(net);
 871	netif_warn(pegasus, timer, net, "tx timeout\n");
 872	usb_unlink_urb(pegasus->tx_urb);
 873	pegasus->stats.tx_errors++;
 874}
 875
 876static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
 877					    struct net_device *net)
 878{
 879	pegasus_t *pegasus = netdev_priv(net);
 880	int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 881	int res;
 882	__u16 l16 = skb->len;
 883
 884	netif_stop_queue(net);
 885
 886	((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 887	skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 888	usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 889			  usb_sndbulkpipe(pegasus->usb, 2),
 890			  pegasus->tx_buff, count,
 891			  write_bulk_callback, pegasus);
 892	if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 893		netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
 894		switch (res) {
 895		case -EPIPE:		/* stall, or disconnect from TT */
 896			/* cleanup should already have been scheduled */
 897			break;
 898		case -ENODEV:		/* disconnect() upcoming */
 899		case -EPERM:
 900			netif_device_detach(pegasus->net);
 901			break;
 902		default:
 903			pegasus->stats.tx_errors++;
 904			netif_start_queue(net);
 905		}
 906	} else {
 907		pegasus->stats.tx_packets++;
 908		pegasus->stats.tx_bytes += skb->len;
 909	}
 910	dev_kfree_skb(skb);
 911
 912	return NETDEV_TX_OK;
 913}
 914
 915static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 916{
 917	return &((pegasus_t *) netdev_priv(dev))->stats;
 918}
 919
 920static inline void disable_net_traffic(pegasus_t *pegasus)
 921{
 922	__le16 tmp = cpu_to_le16(0);
 923
 924	set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
 925}
 926
 927static inline void get_interrupt_interval(pegasus_t *pegasus)
 928{
 929	u16 data;
 930	u8 interval;
 931
 932	read_eprom_word(pegasus, 4, &data);
 933	interval = data >> 8;
 934	if (pegasus->usb->speed != USB_SPEED_HIGH) {
 935		if (interval < 0x80) {
 936			netif_info(pegasus, timer, pegasus->net,
 937				   "intr interval changed from %ums to %ums\n",
 938				   interval, 0x80);
 939			interval = 0x80;
 940			data = (data & 0x00FF) | ((u16)interval << 8);
 941#ifdef PEGASUS_WRITE_EEPROM
 942			write_eprom_word(pegasus, 4, data);
 943#endif
 944		}
 945	}
 946	pegasus->intr_interval = interval;
 947}
 948
 949static void set_carrier(struct net_device *net)
 950{
 951	pegasus_t *pegasus = netdev_priv(net);
 952	u16 tmp;
 953
 954	if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 955		return;
 956
 957	if (tmp & BMSR_LSTATUS)
 958		netif_carrier_on(net);
 959	else
 960		netif_carrier_off(net);
 961}
 962
 963static void free_all_urbs(pegasus_t *pegasus)
 964{
 965	usb_free_urb(pegasus->intr_urb);
 966	usb_free_urb(pegasus->tx_urb);
 967	usb_free_urb(pegasus->rx_urb);
 968	usb_free_urb(pegasus->ctrl_urb);
 969}
 970
 971static void unlink_all_urbs(pegasus_t *pegasus)
 972{
 973	usb_kill_urb(pegasus->intr_urb);
 974	usb_kill_urb(pegasus->tx_urb);
 975	usb_kill_urb(pegasus->rx_urb);
 976	usb_kill_urb(pegasus->ctrl_urb);
 977}
 978
 979static int alloc_urbs(pegasus_t *pegasus)
 980{
 981	pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 982	if (!pegasus->ctrl_urb)
 983		return 0;
 984	pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 985	if (!pegasus->rx_urb) {
 986		usb_free_urb(pegasus->ctrl_urb);
 987		return 0;
 988	}
 989	pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 990	if (!pegasus->tx_urb) {
 991		usb_free_urb(pegasus->rx_urb);
 992		usb_free_urb(pegasus->ctrl_urb);
 993		return 0;
 994	}
 995	pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 996	if (!pegasus->intr_urb) {
 997		usb_free_urb(pegasus->tx_urb);
 998		usb_free_urb(pegasus->rx_urb);
 999		usb_free_urb(pegasus->ctrl_urb);
1000		return 0;
1001	}
1002
1003	return 1;
1004}
1005
1006static int pegasus_open(struct net_device *net)
1007{
1008	pegasus_t *pegasus = netdev_priv(net);
1009	int res;
1010
1011	if (pegasus->rx_skb == NULL)
1012		pegasus->rx_skb = pull_skb(pegasus);
1013	/*
1014	 ** Note: no point to free the pool.  it is empty :-)
1015	 */
1016	if (!pegasus->rx_skb)
1017		return -ENOMEM;
1018
1019	res = set_registers(pegasus, EthID, 6, net->dev_addr);
1020
1021	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1022			  usb_rcvbulkpipe(pegasus->usb, 1),
1023			  pegasus->rx_skb->data, PEGASUS_MTU + 8,
1024			  read_bulk_callback, pegasus);
1025	if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1026		if (res == -ENODEV)
1027			netif_device_detach(pegasus->net);
1028		netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
1029		goto exit;
1030	}
1031
1032	usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1033			 usb_rcvintpipe(pegasus->usb, 3),
1034			 pegasus->intr_buff, sizeof(pegasus->intr_buff),
1035			 intr_callback, pegasus, pegasus->intr_interval);
1036	if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1037		if (res == -ENODEV)
1038			netif_device_detach(pegasus->net);
1039		netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
1040		usb_kill_urb(pegasus->rx_urb);
1041		goto exit;
1042	}
1043	if ((res = enable_net_traffic(net, pegasus->usb))) {
1044		netif_dbg(pegasus, ifup, net,
1045			  "can't enable_net_traffic() - %d\n", res);
1046		res = -EIO;
1047		usb_kill_urb(pegasus->rx_urb);
1048		usb_kill_urb(pegasus->intr_urb);
1049		free_skb_pool(pegasus);
1050		goto exit;
1051	}
1052	set_carrier(net);
1053	netif_start_queue(net);
1054	netif_dbg(pegasus, ifup, net, "open\n");
1055	res = 0;
1056exit:
1057	return res;
1058}
1059
1060static int pegasus_close(struct net_device *net)
1061{
1062	pegasus_t *pegasus = netdev_priv(net);
1063
1064	netif_stop_queue(net);
1065	if (!(pegasus->flags & PEGASUS_UNPLUG))
1066		disable_net_traffic(pegasus);
1067	tasklet_kill(&pegasus->rx_tl);
1068	unlink_all_urbs(pegasus);
1069
1070	return 0;
1071}
1072
1073static void pegasus_get_drvinfo(struct net_device *dev,
1074				struct ethtool_drvinfo *info)
1075{
1076	pegasus_t *pegasus = netdev_priv(dev);
1077	strncpy(info->driver, driver_name, sizeof(info->driver) - 1);
1078	strncpy(info->version, DRIVER_VERSION, sizeof(info->version) - 1);
1079	usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
1080}
1081
1082/* also handles three patterns of some kind in hardware */
1083#define	WOL_SUPPORTED	(WAKE_MAGIC|WAKE_PHY)
1084
1085static void
1086pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1087{
1088	pegasus_t	*pegasus = netdev_priv(dev);
1089
1090	wol->supported = WAKE_MAGIC | WAKE_PHY;
1091	wol->wolopts = pegasus->wolopts;
1092}
1093
1094static int
1095pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1096{
1097	pegasus_t	*pegasus = netdev_priv(dev);
1098	u8		reg78 = 0x04;
1099
1100	if (wol->wolopts & ~WOL_SUPPORTED)
1101		return -EINVAL;
1102
1103	if (wol->wolopts & WAKE_MAGIC)
1104		reg78 |= 0x80;
1105	if (wol->wolopts & WAKE_PHY)
1106		reg78 |= 0x40;
1107	/* FIXME this 0x10 bit still needs to get set in the chip... */
1108	if (wol->wolopts)
1109		pegasus->eth_regs[0] |= 0x10;
1110	else
1111		pegasus->eth_regs[0] &= ~0x10;
1112	pegasus->wolopts = wol->wolopts;
1113	return set_register(pegasus, WakeupControl, reg78);
1114}
1115
1116static inline void pegasus_reset_wol(struct net_device *dev)
1117{
1118	struct ethtool_wolinfo wol;
1119
1120	memset(&wol, 0, sizeof wol);
1121	(void) pegasus_set_wol(dev, &wol);
1122}
1123
1124static int
1125pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1126{
1127	pegasus_t *pegasus;
1128
1129	pegasus = netdev_priv(dev);
1130	mii_ethtool_gset(&pegasus->mii, ecmd);
1131	return 0;
1132}
1133
1134static int
1135pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1136{
1137	pegasus_t *pegasus = netdev_priv(dev);
1138	return mii_ethtool_sset(&pegasus->mii, ecmd);
1139}
1140
1141static int pegasus_nway_reset(struct net_device *dev)
1142{
1143	pegasus_t *pegasus = netdev_priv(dev);
1144	return mii_nway_restart(&pegasus->mii);
1145}
1146
1147static u32 pegasus_get_link(struct net_device *dev)
1148{
1149	pegasus_t *pegasus = netdev_priv(dev);
1150	return mii_link_ok(&pegasus->mii);
1151}
1152
1153static u32 pegasus_get_msglevel(struct net_device *dev)
1154{
1155	pegasus_t *pegasus = netdev_priv(dev);
1156	return pegasus->msg_enable;
1157}
1158
1159static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1160{
1161	pegasus_t *pegasus = netdev_priv(dev);
1162	pegasus->msg_enable = v;
1163}
1164
1165static const struct ethtool_ops ops = {
1166	.get_drvinfo = pegasus_get_drvinfo,
1167	.get_settings = pegasus_get_settings,
1168	.set_settings = pegasus_set_settings,
1169	.nway_reset = pegasus_nway_reset,
1170	.get_link = pegasus_get_link,
1171	.get_msglevel = pegasus_get_msglevel,
1172	.set_msglevel = pegasus_set_msglevel,
1173	.get_wol = pegasus_get_wol,
1174	.set_wol = pegasus_set_wol,
1175};
1176
1177static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1178{
1179	__u16 *data = (__u16 *) &rq->ifr_ifru;
1180	pegasus_t *pegasus = netdev_priv(net);
1181	int res;
1182
1183	switch (cmd) {
1184	case SIOCDEVPRIVATE:
1185		data[0] = pegasus->phy;
1186	case SIOCDEVPRIVATE + 1:
1187		read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1188		res = 0;
1189		break;
1190	case SIOCDEVPRIVATE + 2:
1191		if (!capable(CAP_NET_ADMIN))
1192			return -EPERM;
1193		write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1194		res = 0;
1195		break;
1196	default:
1197		res = -EOPNOTSUPP;
1198	}
1199	return res;
1200}
1201
1202static void pegasus_set_multicast(struct net_device *net)
1203{
1204	pegasus_t *pegasus = netdev_priv(net);
1205
1206	if (net->flags & IFF_PROMISC) {
1207		pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1208		netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1209	} else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1210		pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1211		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1212		netif_dbg(pegasus, link, net, "set allmulti\n");
1213	} else {
1214		pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1215		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1216	}
1217
1218	pegasus->ctrl_urb->status = 0;
1219
1220	pegasus->flags |= ETH_REGS_CHANGE;
1221	ctrl_callback(pegasus->ctrl_urb);
1222}
1223
1224static __u8 mii_phy_probe(pegasus_t *pegasus)
1225{
1226	int i;
1227	__u16 tmp;
1228
1229	for (i = 0; i < 32; i++) {
1230		read_mii_word(pegasus, i, MII_BMSR, &tmp);
1231		if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1232			continue;
1233		else
1234			return i;
1235	}
1236
1237	return 0xff;
1238}
1239
1240static inline void setup_pegasus_II(pegasus_t *pegasus)
1241{
1242	__u8 data = 0xa5;
1243
1244	set_register(pegasus, Reg1d, 0);
1245	set_register(pegasus, Reg7b, 1);
1246	mdelay(100);
1247	if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1248		set_register(pegasus, Reg7b, 0);
1249	else
1250		set_register(pegasus, Reg7b, 2);
1251
1252	set_register(pegasus, 0x83, data);
1253	get_registers(pegasus, 0x83, 1, &data);
1254
1255	if (data == 0xa5)
1256		pegasus->chip = 0x8513;
1257	else
1258		pegasus->chip = 0;
1259
1260	set_register(pegasus, 0x80, 0xc0);
1261	set_register(pegasus, 0x83, 0xff);
1262	set_register(pegasus, 0x84, 0x01);
1263
1264	if (pegasus->features & HAS_HOME_PNA && mii_mode)
1265		set_register(pegasus, Reg81, 6);
1266	else
1267		set_register(pegasus, Reg81, 2);
1268}
1269
1270
1271static int pegasus_count;
1272static struct workqueue_struct *pegasus_workqueue;
1273#define CARRIER_CHECK_DELAY (2 * HZ)
1274
1275static void check_carrier(struct work_struct *work)
1276{
1277	pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1278	set_carrier(pegasus->net);
1279	if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1280		queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1281			CARRIER_CHECK_DELAY);
1282	}
1283}
1284
1285static int pegasus_blacklisted(struct usb_device *udev)
1286{
1287	struct usb_device_descriptor *udd = &udev->descriptor;
1288
1289	/* Special quirk to keep the driver from handling the Belkin Bluetooth
1290	 * dongle which happens to have the same ID.
1291	 */
1292	if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1293	    (udd->idProduct == cpu_to_le16(0x0121)) &&
1294	    (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1295	    (udd->bDeviceProtocol == 1))
1296		return 1;
1297
1298	return 0;
1299}
1300
1301/* we rely on probe() and remove() being serialized so we
1302 * don't need extra locking on pegasus_count.
1303 */
1304static void pegasus_dec_workqueue(void)
1305{
1306	pegasus_count--;
1307	if (pegasus_count == 0) {
1308		destroy_workqueue(pegasus_workqueue);
1309		pegasus_workqueue = NULL;
1310	}
1311}
1312
1313static int pegasus_probe(struct usb_interface *intf,
1314			 const struct usb_device_id *id)
1315{
1316	struct usb_device *dev = interface_to_usbdev(intf);
1317	struct net_device *net;
1318	pegasus_t *pegasus;
1319	int dev_index = id - pegasus_ids;
1320	int res = -ENOMEM;
1321
1322	if (pegasus_blacklisted(dev))
1323		return -ENODEV;
1324
1325	if (pegasus_count == 0) {
1326		pegasus_workqueue = create_singlethread_workqueue("pegasus");
1327		if (!pegasus_workqueue)
1328			return -ENOMEM;
1329	}
1330	pegasus_count++;
1331
1332	usb_get_dev(dev);
1333
1334	net = alloc_etherdev(sizeof(struct pegasus));
1335	if (!net) {
1336		dev_err(&intf->dev, "can't allocate %s\n", "device");
1337		goto out;
1338	}
1339
1340	pegasus = netdev_priv(net);
1341	pegasus->dev_index = dev_index;
1342	init_waitqueue_head(&pegasus->ctrl_wait);
1343
1344	if (!alloc_urbs(pegasus)) {
1345		dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1346		goto out1;
1347	}
1348
1349	tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1350
1351	INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1352
1353	pegasus->intf = intf;
1354	pegasus->usb = dev;
1355	pegasus->net = net;
1356
1357
1358	net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1359	net->netdev_ops = &pegasus_netdev_ops;
1360	SET_ETHTOOL_OPS(net, &ops);
1361	pegasus->mii.dev = net;
1362	pegasus->mii.mdio_read = mdio_read;
1363	pegasus->mii.mdio_write = mdio_write;
1364	pegasus->mii.phy_id_mask = 0x1f;
1365	pegasus->mii.reg_num_mask = 0x1f;
1366	spin_lock_init(&pegasus->rx_pool_lock);
1367	pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1368				| NETIF_MSG_PROBE | NETIF_MSG_LINK);
1369
1370	pegasus->features = usb_dev_id[dev_index].private;
1371	get_interrupt_interval(pegasus);
1372	if (reset_mac(pegasus)) {
1373		dev_err(&intf->dev, "can't reset MAC\n");
1374		res = -EIO;
1375		goto out2;
1376	}
1377	set_ethernet_addr(pegasus);
1378	fill_skb_pool(pegasus);
1379	if (pegasus->features & PEGASUS_II) {
1380		dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1381		setup_pegasus_II(pegasus);
1382	}
1383	pegasus->phy = mii_phy_probe(pegasus);
1384	if (pegasus->phy == 0xff) {
1385		dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1386		pegasus->phy = 1;
1387	}
1388	pegasus->mii.phy_id = pegasus->phy;
1389	usb_set_intfdata(intf, pegasus);
1390	SET_NETDEV_DEV(net, &intf->dev);
1391	pegasus_reset_wol(net);
1392	res = register_netdev(net);
1393	if (res)
1394		goto out3;
1395	queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1396				CARRIER_CHECK_DELAY);
1397
1398	dev_info(&intf->dev, "%s, %s, %pM\n",
1399		 net->name,
1400		 usb_dev_id[dev_index].name,
1401		 net->dev_addr);
1402	return 0;
1403
1404out3:
1405	usb_set_intfdata(intf, NULL);
1406	free_skb_pool(pegasus);
1407out2:
1408	free_all_urbs(pegasus);
1409out1:
1410	free_netdev(net);
1411out:
1412	usb_put_dev(dev);
1413	pegasus_dec_workqueue();
1414	return res;
1415}
1416
1417static void pegasus_disconnect(struct usb_interface *intf)
1418{
1419	struct pegasus *pegasus = usb_get_intfdata(intf);
1420
1421	usb_set_intfdata(intf, NULL);
1422	if (!pegasus) {
1423		dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1424		return;
1425	}
1426
1427	pegasus->flags |= PEGASUS_UNPLUG;
1428	cancel_delayed_work(&pegasus->carrier_check);
1429	unregister_netdev(pegasus->net);
1430	usb_put_dev(interface_to_usbdev(intf));
1431	unlink_all_urbs(pegasus);
1432	free_all_urbs(pegasus);
1433	free_skb_pool(pegasus);
1434	if (pegasus->rx_skb != NULL) {
1435		dev_kfree_skb(pegasus->rx_skb);
1436		pegasus->rx_skb = NULL;
1437	}
1438	free_netdev(pegasus->net);
1439	pegasus_dec_workqueue();
1440}
1441
1442static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1443{
1444	struct pegasus *pegasus = usb_get_intfdata(intf);
1445
1446	netif_device_detach(pegasus->net);
1447	cancel_delayed_work(&pegasus->carrier_check);
1448	if (netif_running(pegasus->net)) {
1449		usb_kill_urb(pegasus->rx_urb);
1450		usb_kill_urb(pegasus->intr_urb);
1451	}
1452	return 0;
1453}
1454
1455static int pegasus_resume(struct usb_interface *intf)
1456{
1457	struct pegasus *pegasus = usb_get_intfdata(intf);
1458
1459	netif_device_attach(pegasus->net);
1460	if (netif_running(pegasus->net)) {
1461		pegasus->rx_urb->status = 0;
1462		pegasus->rx_urb->actual_length = 0;
1463		read_bulk_callback(pegasus->rx_urb);
1464
1465		pegasus->intr_urb->status = 0;
1466		pegasus->intr_urb->actual_length = 0;
1467		intr_callback(pegasus->intr_urb);
1468	}
1469	queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1470				CARRIER_CHECK_DELAY);
1471	return 0;
1472}
1473
1474static const struct net_device_ops pegasus_netdev_ops = {
1475	.ndo_open =			pegasus_open,
1476	.ndo_stop =			pegasus_close,
1477	.ndo_do_ioctl =			pegasus_ioctl,
1478	.ndo_start_xmit =		pegasus_start_xmit,
1479	.ndo_set_multicast_list =	pegasus_set_multicast,
1480	.ndo_get_stats =		pegasus_netdev_stats,
1481	.ndo_tx_timeout =		pegasus_tx_timeout,
1482	.ndo_change_mtu =		eth_change_mtu,
1483	.ndo_set_mac_address =		eth_mac_addr,
1484	.ndo_validate_addr =		eth_validate_addr,
1485};
1486
1487static struct usb_driver pegasus_driver = {
1488	.name = driver_name,
1489	.probe = pegasus_probe,
1490	.disconnect = pegasus_disconnect,
1491	.id_table = pegasus_ids,
1492	.suspend = pegasus_suspend,
1493	.resume = pegasus_resume,
 
1494};
1495
1496static void __init parse_id(char *id)
1497{
1498	unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1499	char *token, *name = NULL;
1500
1501	if ((token = strsep(&id, ":")) != NULL)
1502		name = token;
1503	/* name now points to a null terminated string*/
1504	if ((token = strsep(&id, ":")) != NULL)
1505		vendor_id = simple_strtoul(token, NULL, 16);
1506	if ((token = strsep(&id, ":")) != NULL)
1507		device_id = simple_strtoul(token, NULL, 16);
1508	flags = simple_strtoul(id, NULL, 16);
1509	pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1510		driver_name, name, vendor_id, device_id, flags);
1511
1512	if (vendor_id > 0x10000 || vendor_id == 0)
1513		return;
1514	if (device_id > 0x10000 || device_id == 0)
1515		return;
1516
1517	for (i = 0; usb_dev_id[i].name; i++);
1518	usb_dev_id[i].name = name;
1519	usb_dev_id[i].vendor = vendor_id;
1520	usb_dev_id[i].device = device_id;
1521	usb_dev_id[i].private = flags;
1522	pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1523	pegasus_ids[i].idVendor = vendor_id;
1524	pegasus_ids[i].idProduct = device_id;
1525}
1526
1527static int __init pegasus_init(void)
1528{
1529	pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1530	if (devid)
1531		parse_id(devid);
1532	return usb_register(&pegasus_driver);
1533}
1534
1535static void __exit pegasus_exit(void)
1536{
1537	usb_deregister(&pegasus_driver);
1538}
1539
1540module_init(pegasus_init);
1541module_exit(pegasus_exit);