xref: /openbmc/linux/drivers/net/usb/rtl8150.c (revision 9ac8d3fb)
1 /*
2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * version 2 as published by the Free Software Foundation.
7  */
8 
9 #include <linux/init.h>
10 #include <linux/signal.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/mii.h>
16 #include <linux/ethtool.h>
17 #include <linux/usb.h>
18 #include <asm/uaccess.h>
19 
20 /* Version Information */
21 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
22 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
23 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
24 
25 #define	IDR			0x0120
26 #define	MAR			0x0126
27 #define	CR			0x012e
28 #define	TCR			0x012f
29 #define	RCR			0x0130
30 #define	TSR			0x0132
31 #define	RSR			0x0133
32 #define	CON0			0x0135
33 #define	CON1			0x0136
34 #define	MSR			0x0137
35 #define	PHYADD			0x0138
36 #define	PHYDAT			0x0139
37 #define	PHYCNT			0x013b
38 #define	GPPC			0x013d
39 #define	BMCR			0x0140
40 #define	BMSR			0x0142
41 #define	ANAR			0x0144
42 #define	ANLP			0x0146
43 #define	AER			0x0148
44 #define CSCR			0x014C  /* This one has the link status */
45 #define CSCR_LINK_STATUS	(1 << 3)
46 
47 #define	IDR_EEPROM		0x1202
48 
49 #define	PHY_READ		0
50 #define	PHY_WRITE		0x20
51 #define	PHY_GO			0x40
52 
53 #define	MII_TIMEOUT		10
54 #define	INTBUFSIZE		8
55 
56 #define	RTL8150_REQT_READ	0xc0
57 #define	RTL8150_REQT_WRITE	0x40
58 #define	RTL8150_REQ_GET_REGS	0x05
59 #define	RTL8150_REQ_SET_REGS	0x05
60 
61 
62 /* Transmit status register errors */
63 #define TSR_ECOL		(1<<5)
64 #define TSR_LCOL		(1<<4)
65 #define TSR_LOSS_CRS		(1<<3)
66 #define TSR_JBR			(1<<2)
67 #define TSR_ERRORS		(TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
68 /* Receive status register errors */
69 #define RSR_CRC			(1<<2)
70 #define RSR_FAE			(1<<1)
71 #define RSR_ERRORS		(RSR_CRC | RSR_FAE)
72 
73 /* Media status register definitions */
74 #define MSR_DUPLEX		(1<<4)
75 #define MSR_SPEED		(1<<3)
76 #define MSR_LINK		(1<<2)
77 
78 /* Interrupt pipe data */
79 #define INT_TSR			0x00
80 #define INT_RSR			0x01
81 #define INT_MSR			0x02
82 #define INT_WAKSR		0x03
83 #define INT_TXOK_CNT		0x04
84 #define INT_RXLOST_CNT		0x05
85 #define INT_CRERR_CNT		0x06
86 #define INT_COL_CNT		0x07
87 
88 /* Transmit status register errors */
89 #define TSR_ECOL		(1<<5)
90 #define TSR_LCOL		(1<<4)
91 #define TSR_LOSS_CRS		(1<<3)
92 #define TSR_JBR			(1<<2)
93 #define TSR_ERRORS		(TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
94 /* Receive status register errors */
95 #define RSR_CRC			(1<<2)
96 #define RSR_FAE			(1<<1)
97 #define RSR_ERRORS		(RSR_CRC | RSR_FAE)
98 
99 /* Media status register definitions */
100 #define MSR_DUPLEX		(1<<4)
101 #define MSR_SPEED		(1<<3)
102 #define MSR_LINK		(1<<2)
103 
104 /* Interrupt pipe data */
105 #define INT_TSR			0x00
106 #define INT_RSR			0x01
107 #define INT_MSR			0x02
108 #define INT_WAKSR		0x03
109 #define INT_TXOK_CNT		0x04
110 #define INT_RXLOST_CNT		0x05
111 #define INT_CRERR_CNT		0x06
112 #define INT_COL_CNT		0x07
113 
114 
115 #define	RTL8150_MTU		1540
116 #define	RTL8150_TX_TIMEOUT	(HZ)
117 #define	RX_SKB_POOL_SIZE	4
118 
119 /* rtl8150 flags */
120 #define	RTL8150_HW_CRC		0
121 #define	RX_REG_SET		1
122 #define	RTL8150_UNPLUG		2
123 #define	RX_URB_FAIL		3
124 
125 /* Define these values to match your device */
126 #define	VENDOR_ID_REALTEK		0x0bda
127 #define	VENDOR_ID_MELCO			0x0411
128 #define	VENDOR_ID_MICRONET		0x3980
129 #define	VENDOR_ID_LONGSHINE		0x07b8
130 #define	VENDOR_ID_OQO			0x1557
131 #define	VENDOR_ID_ZYXEL			0x0586
132 
133 #define PRODUCT_ID_RTL8150		0x8150
134 #define	PRODUCT_ID_LUAKTX		0x0012
135 #define	PRODUCT_ID_LCS8138TX		0x401a
136 #define PRODUCT_ID_SP128AR		0x0003
137 #define	PRODUCT_ID_PRESTIGE		0x401a
138 
139 #undef	EEPROM_WRITE
140 
141 /* table of devices that work with this driver */
142 static struct usb_device_id rtl8150_table[] = {
143 	{USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
144 	{USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
145 	{USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
146 	{USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
147 	{USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
148 	{USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
149 	{}
150 };
151 
152 MODULE_DEVICE_TABLE(usb, rtl8150_table);
153 
154 struct rtl8150 {
155 	unsigned long flags;
156 	struct usb_device *udev;
157 	struct tasklet_struct tl;
158 	struct net_device_stats stats;
159 	struct net_device *netdev;
160 	struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
161 	struct sk_buff *tx_skb, *rx_skb;
162 	struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
163 	spinlock_t rx_pool_lock;
164 	struct usb_ctrlrequest dr;
165 	int intr_interval;
166 	__le16 rx_creg;
167 	u8 *intr_buff;
168 	u8 phy;
169 };
170 
171 typedef struct rtl8150 rtl8150_t;
172 
173 static void fill_skb_pool(rtl8150_t *);
174 static void free_skb_pool(rtl8150_t *);
175 static inline struct sk_buff *pull_skb(rtl8150_t *);
176 static void rtl8150_disconnect(struct usb_interface *intf);
177 static int rtl8150_probe(struct usb_interface *intf,
178 			   const struct usb_device_id *id);
179 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
180 static int rtl8150_resume(struct usb_interface *intf);
181 
182 static const char driver_name [] = "rtl8150";
183 
184 static struct usb_driver rtl8150_driver = {
185 	.name =		driver_name,
186 	.probe =	rtl8150_probe,
187 	.disconnect =	rtl8150_disconnect,
188 	.id_table =	rtl8150_table,
189 	.suspend =	rtl8150_suspend,
190 	.resume =	rtl8150_resume
191 };
192 
193 /*
194 **
195 **	device related part of the code
196 **
197 */
198 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
199 {
200 	return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
201 			       RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
202 			       indx, 0, data, size, 500);
203 }
204 
205 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
206 {
207 	return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
208 			       RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
209 			       indx, 0, data, size, 500);
210 }
211 
212 static void ctrl_callback(struct urb *urb)
213 {
214 	rtl8150_t *dev;
215 
216 	switch (urb->status) {
217 	case 0:
218 		break;
219 	case -EINPROGRESS:
220 		break;
221 	case -ENOENT:
222 		break;
223 	default:
224 		dev_warn(&urb->dev->dev, "ctrl urb status %d\n", urb->status);
225 	}
226 	dev = urb->context;
227 	clear_bit(RX_REG_SET, &dev->flags);
228 }
229 
230 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
231 {
232 	int ret;
233 
234 	if (test_bit(RX_REG_SET, &dev->flags))
235 		return -EAGAIN;
236 
237 	dev->dr.bRequestType = RTL8150_REQT_WRITE;
238 	dev->dr.bRequest = RTL8150_REQ_SET_REGS;
239 	dev->dr.wValue = cpu_to_le16(indx);
240 	dev->dr.wIndex = 0;
241 	dev->dr.wLength = cpu_to_le16(size);
242 	dev->ctrl_urb->transfer_buffer_length = size;
243 	usb_fill_control_urb(dev->ctrl_urb, dev->udev,
244 			 usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
245 			 &dev->rx_creg, size, ctrl_callback, dev);
246 	if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
247 		if (ret == -ENODEV)
248 			netif_device_detach(dev->netdev);
249 		err("control request submission failed: %d", ret);
250 	} else
251 		set_bit(RX_REG_SET, &dev->flags);
252 
253 	return ret;
254 }
255 
256 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
257 {
258 	int i;
259 	u8 data[3], tmp;
260 
261 	data[0] = phy;
262 	data[1] = data[2] = 0;
263 	tmp = indx | PHY_READ | PHY_GO;
264 	i = 0;
265 
266 	set_registers(dev, PHYADD, sizeof(data), data);
267 	set_registers(dev, PHYCNT, 1, &tmp);
268 	do {
269 		get_registers(dev, PHYCNT, 1, data);
270 	} while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
271 
272 	if (i < MII_TIMEOUT) {
273 		get_registers(dev, PHYDAT, 2, data);
274 		*reg = data[0] | (data[1] << 8);
275 		return 0;
276 	} else
277 		return 1;
278 }
279 
280 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
281 {
282 	int i;
283 	u8 data[3], tmp;
284 
285 	data[0] = phy;
286 	data[1] = reg & 0xff;
287 	data[2] = (reg >> 8) & 0xff;
288 	tmp = indx | PHY_WRITE | PHY_GO;
289 	i = 0;
290 
291 	set_registers(dev, PHYADD, sizeof(data), data);
292 	set_registers(dev, PHYCNT, 1, &tmp);
293 	do {
294 		get_registers(dev, PHYCNT, 1, data);
295 	} while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
296 
297 	if (i < MII_TIMEOUT)
298 		return 0;
299 	else
300 		return 1;
301 }
302 
303 static inline void set_ethernet_addr(rtl8150_t * dev)
304 {
305 	u8 node_id[6];
306 
307 	get_registers(dev, IDR, sizeof(node_id), node_id);
308 	memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
309 }
310 
311 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
312 {
313 	struct sockaddr *addr = p;
314 	rtl8150_t *dev = netdev_priv(netdev);
315 	int i;
316 
317 	if (netif_running(netdev))
318 		return -EBUSY;
319 
320 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
321 	dbg("%s: Setting MAC address to ", netdev->name);
322 	for (i = 0; i < 5; i++)
323 		dbg("%02X:", netdev->dev_addr[i]);
324 	dbg("%02X\n", netdev->dev_addr[i]);
325 	/* Set the IDR registers. */
326 	set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
327 #ifdef EEPROM_WRITE
328 	{
329 	u8 cr;
330 	/* Get the CR contents. */
331 	get_registers(dev, CR, 1, &cr);
332 	/* Set the WEPROM bit (eeprom write enable). */
333 	cr |= 0x20;
334 	set_registers(dev, CR, 1, &cr);
335 	/* Write the MAC address into eeprom. Eeprom writes must be word-sized,
336 	   so we need to split them up. */
337 	for (i = 0; i * 2 < netdev->addr_len; i++) {
338 		set_registers(dev, IDR_EEPROM + (i * 2), 2,
339 		netdev->dev_addr + (i * 2));
340 	}
341 	/* Clear the WEPROM bit (preventing accidental eeprom writes). */
342 	cr &= 0xdf;
343 	set_registers(dev, CR, 1, &cr);
344 	}
345 #endif
346 	return 0;
347 }
348 
349 static int rtl8150_reset(rtl8150_t * dev)
350 {
351 	u8 data = 0x10;
352 	int i = HZ;
353 
354 	set_registers(dev, CR, 1, &data);
355 	do {
356 		get_registers(dev, CR, 1, &data);
357 	} while ((data & 0x10) && --i);
358 
359 	return (i > 0) ? 1 : 0;
360 }
361 
362 static int alloc_all_urbs(rtl8150_t * dev)
363 {
364 	dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
365 	if (!dev->rx_urb)
366 		return 0;
367 	dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
368 	if (!dev->tx_urb) {
369 		usb_free_urb(dev->rx_urb);
370 		return 0;
371 	}
372 	dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
373 	if (!dev->intr_urb) {
374 		usb_free_urb(dev->rx_urb);
375 		usb_free_urb(dev->tx_urb);
376 		return 0;
377 	}
378 	dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
379 	if (!dev->ctrl_urb) {
380 		usb_free_urb(dev->rx_urb);
381 		usb_free_urb(dev->tx_urb);
382 		usb_free_urb(dev->intr_urb);
383 		return 0;
384 	}
385 
386 	return 1;
387 }
388 
389 static void free_all_urbs(rtl8150_t * dev)
390 {
391 	usb_free_urb(dev->rx_urb);
392 	usb_free_urb(dev->tx_urb);
393 	usb_free_urb(dev->intr_urb);
394 	usb_free_urb(dev->ctrl_urb);
395 }
396 
397 static void unlink_all_urbs(rtl8150_t * dev)
398 {
399 	usb_kill_urb(dev->rx_urb);
400 	usb_kill_urb(dev->tx_urb);
401 	usb_kill_urb(dev->intr_urb);
402 	usb_kill_urb(dev->ctrl_urb);
403 }
404 
405 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
406 {
407 	struct sk_buff *skb;
408 	int i;
409 
410 	for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
411 		if (dev->rx_skb_pool[i]) {
412 			skb = dev->rx_skb_pool[i];
413 			dev->rx_skb_pool[i] = NULL;
414 			return skb;
415 		}
416 	}
417 	return NULL;
418 }
419 
420 static void read_bulk_callback(struct urb *urb)
421 {
422 	rtl8150_t *dev;
423 	unsigned pkt_len, res;
424 	struct sk_buff *skb;
425 	struct net_device *netdev;
426 	u16 rx_stat;
427 	int status;
428 
429 	dev = urb->context;
430 	if (!dev)
431 		return;
432 	if (test_bit(RTL8150_UNPLUG, &dev->flags))
433 		return;
434 	netdev = dev->netdev;
435 	if (!netif_device_present(netdev))
436 		return;
437 
438 	switch (urb->status) {
439 	case 0:
440 		break;
441 	case -ENOENT:
442 		return;	/* the urb is in unlink state */
443 	case -ETIME:
444 		dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
445 		goto goon;
446 	default:
447 		dev_warn(&urb->dev->dev, "Rx status %d\n", urb->status);
448 		goto goon;
449 	}
450 
451 	if (!dev->rx_skb)
452 		goto resched;
453 	/* protect against short packets (tell me why we got some?!?) */
454 	if (urb->actual_length < 4)
455 		goto goon;
456 
457 	res = urb->actual_length;
458 	rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
459 	pkt_len = res - 4;
460 
461 	skb_put(dev->rx_skb, pkt_len);
462 	dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
463 	netif_rx(dev->rx_skb);
464 	dev->stats.rx_packets++;
465 	dev->stats.rx_bytes += pkt_len;
466 
467 	spin_lock(&dev->rx_pool_lock);
468 	skb = pull_skb(dev);
469 	spin_unlock(&dev->rx_pool_lock);
470 	if (!skb)
471 		goto resched;
472 
473 	dev->rx_skb = skb;
474 goon:
475 	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
476 		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
477 	status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
478 	if (status == -ENODEV)
479 		netif_device_detach(dev->netdev);
480 	else if (status) {
481 		set_bit(RX_URB_FAIL, &dev->flags);
482 		goto resched;
483 	} else {
484 		clear_bit(RX_URB_FAIL, &dev->flags);
485 	}
486 
487 	return;
488 resched:
489 	tasklet_schedule(&dev->tl);
490 }
491 
492 static void rx_fixup(unsigned long data)
493 {
494 	rtl8150_t *dev;
495 	struct sk_buff *skb;
496 	int status;
497 
498 	dev = (rtl8150_t *)data;
499 
500 	spin_lock_irq(&dev->rx_pool_lock);
501 	fill_skb_pool(dev);
502 	spin_unlock_irq(&dev->rx_pool_lock);
503 	if (test_bit(RX_URB_FAIL, &dev->flags))
504 		if (dev->rx_skb)
505 			goto try_again;
506 	spin_lock_irq(&dev->rx_pool_lock);
507 	skb = pull_skb(dev);
508 	spin_unlock_irq(&dev->rx_pool_lock);
509 	if (skb == NULL)
510 		goto tlsched;
511 	dev->rx_skb = skb;
512 	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
513 		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
514 try_again:
515 	status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
516 	if (status == -ENODEV) {
517 		netif_device_detach(dev->netdev);
518 	} else if (status) {
519 		set_bit(RX_URB_FAIL, &dev->flags);
520 		goto tlsched;
521 	} else {
522 		clear_bit(RX_URB_FAIL, &dev->flags);
523 	}
524 
525 	return;
526 tlsched:
527 	tasklet_schedule(&dev->tl);
528 }
529 
530 static void write_bulk_callback(struct urb *urb)
531 {
532 	rtl8150_t *dev;
533 
534 	dev = urb->context;
535 	if (!dev)
536 		return;
537 	dev_kfree_skb_irq(dev->tx_skb);
538 	if (!netif_device_present(dev->netdev))
539 		return;
540 	if (urb->status)
541 		dev_info(&urb->dev->dev, "%s: Tx status %d\n",
542 			 dev->netdev->name, urb->status);
543 	dev->netdev->trans_start = jiffies;
544 	netif_wake_queue(dev->netdev);
545 }
546 
547 static void intr_callback(struct urb *urb)
548 {
549 	rtl8150_t *dev;
550 	__u8 *d;
551 	int status;
552 
553 	dev = urb->context;
554 	if (!dev)
555 		return;
556 	switch (urb->status) {
557 	case 0:			/* success */
558 		break;
559 	case -ECONNRESET:	/* unlink */
560 	case -ENOENT:
561 	case -ESHUTDOWN:
562 		return;
563 	/* -EPIPE:  should clear the halt */
564 	default:
565 		dev_info(&urb->dev->dev, "%s: intr status %d\n",
566 			 dev->netdev->name, urb->status);
567 		goto resubmit;
568 	}
569 
570 	d = urb->transfer_buffer;
571 	if (d[0] & TSR_ERRORS) {
572 		dev->stats.tx_errors++;
573 		if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
574 			dev->stats.tx_aborted_errors++;
575 		if (d[INT_TSR] & TSR_LCOL)
576 			dev->stats.tx_window_errors++;
577 		if (d[INT_TSR] & TSR_LOSS_CRS)
578 			dev->stats.tx_carrier_errors++;
579 	}
580 	/* Report link status changes to the network stack */
581 	if ((d[INT_MSR] & MSR_LINK) == 0) {
582 		if (netif_carrier_ok(dev->netdev)) {
583 			netif_carrier_off(dev->netdev);
584 			dbg("%s: LINK LOST\n", __func__);
585 		}
586 	} else {
587 		if (!netif_carrier_ok(dev->netdev)) {
588 			netif_carrier_on(dev->netdev);
589 			dbg("%s: LINK CAME BACK\n", __func__);
590 		}
591 	}
592 
593 resubmit:
594 	status = usb_submit_urb (urb, GFP_ATOMIC);
595 	if (status == -ENODEV)
596 		netif_device_detach(dev->netdev);
597 	else if (status)
598 		err ("can't resubmit intr, %s-%s/input0, status %d",
599 				dev->udev->bus->bus_name,
600 				dev->udev->devpath, status);
601 }
602 
603 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
604 {
605 	rtl8150_t *dev = usb_get_intfdata(intf);
606 
607 	netif_device_detach(dev->netdev);
608 
609 	if (netif_running(dev->netdev)) {
610 		usb_kill_urb(dev->rx_urb);
611 		usb_kill_urb(dev->intr_urb);
612 	}
613 	return 0;
614 }
615 
616 static int rtl8150_resume(struct usb_interface *intf)
617 {
618 	rtl8150_t *dev = usb_get_intfdata(intf);
619 
620 	netif_device_attach(dev->netdev);
621 	if (netif_running(dev->netdev)) {
622 		dev->rx_urb->status = 0;
623 		dev->rx_urb->actual_length = 0;
624 		read_bulk_callback(dev->rx_urb);
625 
626 		dev->intr_urb->status = 0;
627 		dev->intr_urb->actual_length = 0;
628 		intr_callback(dev->intr_urb);
629 	}
630 	return 0;
631 }
632 
633 /*
634 **
635 **	network related part of the code
636 **
637 */
638 
639 static void fill_skb_pool(rtl8150_t *dev)
640 {
641 	struct sk_buff *skb;
642 	int i;
643 
644 	for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
645 		if (dev->rx_skb_pool[i])
646 			continue;
647 		skb = dev_alloc_skb(RTL8150_MTU + 2);
648 		if (!skb) {
649 			return;
650 		}
651 		skb_reserve(skb, 2);
652 		dev->rx_skb_pool[i] = skb;
653 	}
654 }
655 
656 static void free_skb_pool(rtl8150_t *dev)
657 {
658 	int i;
659 
660 	for (i = 0; i < RX_SKB_POOL_SIZE; i++)
661 		if (dev->rx_skb_pool[i])
662 			dev_kfree_skb(dev->rx_skb_pool[i]);
663 }
664 
665 static int enable_net_traffic(rtl8150_t * dev)
666 {
667 	u8 cr, tcr, rcr, msr;
668 
669 	if (!rtl8150_reset(dev)) {
670 		dev_warn(&dev->udev->dev, "device reset failed\n");
671 	}
672 	/* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
673 	rcr = 0x9e;
674 	dev->rx_creg = cpu_to_le16(rcr);
675 	tcr = 0xd8;
676 	cr = 0x0c;
677 	if (!(rcr & 0x80))
678 		set_bit(RTL8150_HW_CRC, &dev->flags);
679 	set_registers(dev, RCR, 1, &rcr);
680 	set_registers(dev, TCR, 1, &tcr);
681 	set_registers(dev, CR, 1, &cr);
682 	get_registers(dev, MSR, 1, &msr);
683 
684 	return 0;
685 }
686 
687 static void disable_net_traffic(rtl8150_t * dev)
688 {
689 	u8 cr;
690 
691 	get_registers(dev, CR, 1, &cr);
692 	cr &= 0xf3;
693 	set_registers(dev, CR, 1, &cr);
694 }
695 
696 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
697 {
698 	return &((rtl8150_t *)netdev_priv(dev))->stats;
699 }
700 
701 static void rtl8150_tx_timeout(struct net_device *netdev)
702 {
703 	rtl8150_t *dev = netdev_priv(netdev);
704 	dev_warn(&netdev->dev, "Tx timeout.\n");
705 	usb_unlink_urb(dev->tx_urb);
706 	dev->stats.tx_errors++;
707 }
708 
709 static void rtl8150_set_multicast(struct net_device *netdev)
710 {
711 	rtl8150_t *dev = netdev_priv(netdev);
712 	netif_stop_queue(netdev);
713 	if (netdev->flags & IFF_PROMISC) {
714 		dev->rx_creg |= cpu_to_le16(0x0001);
715 		dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
716 	} else if (netdev->mc_count ||
717 		   (netdev->flags & IFF_ALLMULTI)) {
718 		dev->rx_creg &= cpu_to_le16(0xfffe);
719 		dev->rx_creg |= cpu_to_le16(0x0002);
720 		dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
721 	} else {
722 		/* ~RX_MULTICAST, ~RX_PROMISCUOUS */
723 		dev->rx_creg &= cpu_to_le16(0x00fc);
724 	}
725 	async_set_registers(dev, RCR, 2);
726 	netif_wake_queue(netdev);
727 }
728 
729 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
730 {
731 	rtl8150_t *dev = netdev_priv(netdev);
732 	int count, res;
733 
734 	netif_stop_queue(netdev);
735 	count = (skb->len < 60) ? 60 : skb->len;
736 	count = (count & 0x3f) ? count : count + 1;
737 	dev->tx_skb = skb;
738 	usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
739 		      skb->data, count, write_bulk_callback, dev);
740 	if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
741 		/* Can we get/handle EPIPE here? */
742 		if (res == -ENODEV)
743 			netif_device_detach(dev->netdev);
744 		else {
745 			dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
746 			dev->stats.tx_errors++;
747 			netif_start_queue(netdev);
748 		}
749 	} else {
750 		dev->stats.tx_packets++;
751 		dev->stats.tx_bytes += skb->len;
752 		netdev->trans_start = jiffies;
753 	}
754 
755 	return 0;
756 }
757 
758 
759 static void set_carrier(struct net_device *netdev)
760 {
761 	rtl8150_t *dev = netdev_priv(netdev);
762 	short tmp;
763 
764 	get_registers(dev, CSCR, 2, &tmp);
765 	if (tmp & CSCR_LINK_STATUS)
766 		netif_carrier_on(netdev);
767 	else
768 		netif_carrier_off(netdev);
769 }
770 
771 static int rtl8150_open(struct net_device *netdev)
772 {
773 	rtl8150_t *dev = netdev_priv(netdev);
774 	int res;
775 
776 	if (dev->rx_skb == NULL)
777 		dev->rx_skb = pull_skb(dev);
778 	if (!dev->rx_skb)
779 		return -ENOMEM;
780 
781 	set_registers(dev, IDR, 6, netdev->dev_addr);
782 
783 	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
784 		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
785 	if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
786 		if (res == -ENODEV)
787 			netif_device_detach(dev->netdev);
788 		dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
789 		return res;
790 	}
791 	usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
792 		     dev->intr_buff, INTBUFSIZE, intr_callback,
793 		     dev, dev->intr_interval);
794 	if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
795 		if (res == -ENODEV)
796 			netif_device_detach(dev->netdev);
797 		dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
798 		usb_kill_urb(dev->rx_urb);
799 		return res;
800 	}
801 	enable_net_traffic(dev);
802 	set_carrier(netdev);
803 	netif_start_queue(netdev);
804 
805 	return res;
806 }
807 
808 static int rtl8150_close(struct net_device *netdev)
809 {
810 	rtl8150_t *dev = netdev_priv(netdev);
811 	int res = 0;
812 
813 	netif_stop_queue(netdev);
814 	if (!test_bit(RTL8150_UNPLUG, &dev->flags))
815 		disable_net_traffic(dev);
816 	unlink_all_urbs(dev);
817 
818 	return res;
819 }
820 
821 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
822 {
823 	rtl8150_t *dev = netdev_priv(netdev);
824 
825 	strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
826 	strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
827 	usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
828 }
829 
830 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
831 {
832 	rtl8150_t *dev = netdev_priv(netdev);
833 	short lpa, bmcr;
834 
835 	ecmd->supported = (SUPPORTED_10baseT_Half |
836 			  SUPPORTED_10baseT_Full |
837 			  SUPPORTED_100baseT_Half |
838 			  SUPPORTED_100baseT_Full |
839 			  SUPPORTED_Autoneg |
840 			  SUPPORTED_TP | SUPPORTED_MII);
841 	ecmd->port = PORT_TP;
842 	ecmd->transceiver = XCVR_INTERNAL;
843 	ecmd->phy_address = dev->phy;
844 	get_registers(dev, BMCR, 2, &bmcr);
845 	get_registers(dev, ANLP, 2, &lpa);
846 	if (bmcr & BMCR_ANENABLE) {
847 		ecmd->autoneg = AUTONEG_ENABLE;
848 		ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
849 			     SPEED_100 : SPEED_10;
850 		if (ecmd->speed == SPEED_100)
851 			ecmd->duplex = (lpa & LPA_100FULL) ?
852 			    DUPLEX_FULL : DUPLEX_HALF;
853 		else
854 			ecmd->duplex = (lpa & LPA_10FULL) ?
855 			    DUPLEX_FULL : DUPLEX_HALF;
856 	} else {
857 		ecmd->autoneg = AUTONEG_DISABLE;
858 		ecmd->speed = (bmcr & BMCR_SPEED100) ?
859 		    SPEED_100 : SPEED_10;
860 		ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
861 		    DUPLEX_FULL : DUPLEX_HALF;
862 	}
863 	return 0;
864 }
865 
866 static struct ethtool_ops ops = {
867 	.get_drvinfo = rtl8150_get_drvinfo,
868 	.get_settings = rtl8150_get_settings,
869 	.get_link = ethtool_op_get_link
870 };
871 
872 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
873 {
874 	rtl8150_t *dev = netdev_priv(netdev);
875 	u16 *data = (u16 *) & rq->ifr_ifru;
876 	int res = 0;
877 
878 	switch (cmd) {
879 	case SIOCDEVPRIVATE:
880 		data[0] = dev->phy;
881 	case SIOCDEVPRIVATE + 1:
882 		read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
883 		break;
884 	case SIOCDEVPRIVATE + 2:
885 		if (!capable(CAP_NET_ADMIN))
886 			return -EPERM;
887 		write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
888 		break;
889 	default:
890 		res = -EOPNOTSUPP;
891 	}
892 
893 	return res;
894 }
895 
896 static int rtl8150_probe(struct usb_interface *intf,
897 			 const struct usb_device_id *id)
898 {
899 	struct usb_device *udev = interface_to_usbdev(intf);
900 	rtl8150_t *dev;
901 	struct net_device *netdev;
902 
903 	netdev = alloc_etherdev(sizeof(rtl8150_t));
904 	if (!netdev) {
905 		err("Out of memory");
906 		return -ENOMEM;
907 	}
908 
909 	dev = netdev_priv(netdev);
910 
911 	dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
912 	if (!dev->intr_buff) {
913 		free_netdev(netdev);
914 		return -ENOMEM;
915 	}
916 
917 	tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
918 	spin_lock_init(&dev->rx_pool_lock);
919 
920 	dev->udev = udev;
921 	dev->netdev = netdev;
922 	netdev->open = rtl8150_open;
923 	netdev->stop = rtl8150_close;
924 	netdev->do_ioctl = rtl8150_ioctl;
925 	netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
926 	netdev->tx_timeout = rtl8150_tx_timeout;
927 	netdev->hard_start_xmit = rtl8150_start_xmit;
928 	netdev->set_multicast_list = rtl8150_set_multicast;
929 	netdev->set_mac_address = rtl8150_set_mac_address;
930 	netdev->get_stats = rtl8150_netdev_stats;
931 	SET_ETHTOOL_OPS(netdev, &ops);
932 	dev->intr_interval = 100;	/* 100ms */
933 
934 	if (!alloc_all_urbs(dev)) {
935 		err("out of memory");
936 		goto out;
937 	}
938 	if (!rtl8150_reset(dev)) {
939 		err("couldn't reset the device");
940 		goto out1;
941 	}
942 	fill_skb_pool(dev);
943 	set_ethernet_addr(dev);
944 
945 	usb_set_intfdata(intf, dev);
946 	SET_NETDEV_DEV(netdev, &intf->dev);
947 	if (register_netdev(netdev) != 0) {
948 		err("couldn't register the device");
949 		goto out2;
950 	}
951 
952 	dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
953 
954 	return 0;
955 
956 out2:
957 	usb_set_intfdata(intf, NULL);
958 	free_skb_pool(dev);
959 out1:
960 	free_all_urbs(dev);
961 out:
962 	kfree(dev->intr_buff);
963 	free_netdev(netdev);
964 	return -EIO;
965 }
966 
967 static void rtl8150_disconnect(struct usb_interface *intf)
968 {
969 	rtl8150_t *dev = usb_get_intfdata(intf);
970 
971 	usb_set_intfdata(intf, NULL);
972 	if (dev) {
973 		set_bit(RTL8150_UNPLUG, &dev->flags);
974 		tasklet_disable(&dev->tl);
975 		tasklet_kill(&dev->tl);
976 		unregister_netdev(dev->netdev);
977 		unlink_all_urbs(dev);
978 		free_all_urbs(dev);
979 		free_skb_pool(dev);
980 		if (dev->rx_skb)
981 			dev_kfree_skb(dev->rx_skb);
982 		kfree(dev->intr_buff);
983 		free_netdev(dev->netdev);
984 	}
985 }
986 
987 static int __init usb_rtl8150_init(void)
988 {
989 	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
990 	       DRIVER_DESC "\n");
991 	return usb_register(&rtl8150_driver);
992 }
993 
994 static void __exit usb_rtl8150_exit(void)
995 {
996 	usb_deregister(&rtl8150_driver);
997 }
998 
999 module_init(usb_rtl8150_init);
1000 module_exit(usb_rtl8150_exit);
1001 
1002 MODULE_AUTHOR(DRIVER_AUTHOR);
1003 MODULE_DESCRIPTION(DRIVER_DESC);
1004 MODULE_LICENSE("GPL");
1005