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x86: fix bootup crash in native_read_tsc()
[wrt350n-kernel.git] / drivers / net / usb / rtl8150.c
blob33cbc306226c67a9a98019d34c4b7eb1ba52b0d5
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 warn("ctrl urb status %d", 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->intr_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 warn("may be reset is needed?..");
445 goto goon;
446 default:
447 warn("Rx status %d", 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 info("%s: Tx status %d", dev->netdev->name, urb->status);
542 dev->netdev->trans_start = jiffies;
543 netif_wake_queue(dev->netdev);
544 }
545
546 static void intr_callback(struct urb *urb)
547 {
548 rtl8150_t *dev;
549 __u8 *d;
550 int status;
551
552 dev = urb->context;
553 if (!dev)
554 return;
555 switch (urb->status) {
556 case 0: /* success */
557 break;
558 case -ECONNRESET: /* unlink */
559 case -ENOENT:
560 case -ESHUTDOWN:
561 return;
562 /* -EPIPE: should clear the halt */
563 default:
564 info("%s: intr status %d", dev->netdev->name, urb->status);
565 goto resubmit;
566 }
567
568 d = urb->transfer_buffer;
569 if (d[0] & TSR_ERRORS) {
570 dev->stats.tx_errors++;
571 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
572 dev->stats.tx_aborted_errors++;
573 if (d[INT_TSR] & TSR_LCOL)
574 dev->stats.tx_window_errors++;
575 if (d[INT_TSR] & TSR_LOSS_CRS)
576 dev->stats.tx_carrier_errors++;
577 }
578 /* Report link status changes to the network stack */
579 if ((d[INT_MSR] & MSR_LINK) == 0) {
580 if (netif_carrier_ok(dev->netdev)) {
581 netif_carrier_off(dev->netdev);
582 dbg("%s: LINK LOST\n", __func__);
583 }
584 } else {
585 if (!netif_carrier_ok(dev->netdev)) {
586 netif_carrier_on(dev->netdev);
587 dbg("%s: LINK CAME BACK\n", __func__);
588 }
589 }
590
591 resubmit:
592 status = usb_submit_urb (urb, GFP_ATOMIC);
593 if (status == -ENODEV)
594 netif_device_detach(dev->netdev);
595 else if (status)
596 err ("can't resubmit intr, %s-%s/input0, status %d",
597 dev->udev->bus->bus_name,
598 dev->udev->devpath, status);
599 }
600
601 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
602 {
603 rtl8150_t *dev = usb_get_intfdata(intf);
604
605 netif_device_detach(dev->netdev);
606
607 if (netif_running(dev->netdev)) {
608 usb_kill_urb(dev->rx_urb);
609 usb_kill_urb(dev->intr_urb);
610 }
611 return 0;
612 }
613
614 static int rtl8150_resume(struct usb_interface *intf)
615 {
616 rtl8150_t *dev = usb_get_intfdata(intf);
617
618 netif_device_attach(dev->netdev);
619 if (netif_running(dev->netdev)) {
620 dev->rx_urb->status = 0;
621 dev->rx_urb->actual_length = 0;
622 read_bulk_callback(dev->rx_urb);
623
624 dev->intr_urb->status = 0;
625 dev->intr_urb->actual_length = 0;
626 intr_callback(dev->intr_urb);
627 }
628 return 0;
629 }
630
631 /*
632 **
633 ** network related part of the code
634 **
635 */
636
637 static void fill_skb_pool(rtl8150_t *dev)
638 {
639 struct sk_buff *skb;
640 int i;
641
642 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
643 if (dev->rx_skb_pool[i])
644 continue;
645 skb = dev_alloc_skb(RTL8150_MTU + 2);
646 if (!skb) {
647 return;
648 }
649 skb_reserve(skb, 2);
650 dev->rx_skb_pool[i] = skb;
651 }
652 }
653
654 static void free_skb_pool(rtl8150_t *dev)
655 {
656 int i;
657
658 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
659 if (dev->rx_skb_pool[i])
660 dev_kfree_skb(dev->rx_skb_pool[i]);
661 }
662
663 static int enable_net_traffic(rtl8150_t * dev)
664 {
665 u8 cr, tcr, rcr, msr;
666
667 if (!rtl8150_reset(dev)) {
668 warn("%s - device reset failed", __FUNCTION__);
669 }
670 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
671 rcr = 0x9e;
672 dev->rx_creg = cpu_to_le16(rcr);
673 tcr = 0xd8;
674 cr = 0x0c;
675 if (!(rcr & 0x80))
676 set_bit(RTL8150_HW_CRC, &dev->flags);
677 set_registers(dev, RCR, 1, &rcr);
678 set_registers(dev, TCR, 1, &tcr);
679 set_registers(dev, CR, 1, &cr);
680 get_registers(dev, MSR, 1, &msr);
681
682 return 0;
683 }
684
685 static void disable_net_traffic(rtl8150_t * dev)
686 {
687 u8 cr;
688
689 get_registers(dev, CR, 1, &cr);
690 cr &= 0xf3;
691 set_registers(dev, CR, 1, &cr);
692 }
693
694 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
695 {
696 return &((rtl8150_t *)netdev_priv(dev))->stats;
697 }
698
699 static void rtl8150_tx_timeout(struct net_device *netdev)
700 {
701 rtl8150_t *dev = netdev_priv(netdev);
702 warn("%s: Tx timeout.", netdev->name);
703 usb_unlink_urb(dev->tx_urb);
704 dev->stats.tx_errors++;
705 }
706
707 static void rtl8150_set_multicast(struct net_device *netdev)
708 {
709 rtl8150_t *dev = netdev_priv(netdev);
710 netif_stop_queue(netdev);
711 if (netdev->flags & IFF_PROMISC) {
712 dev->rx_creg |= cpu_to_le16(0x0001);
713 info("%s: promiscuous mode", netdev->name);
714 } else if (netdev->mc_count ||
715 (netdev->flags & IFF_ALLMULTI)) {
716 dev->rx_creg &= cpu_to_le16(0xfffe);
717 dev->rx_creg |= cpu_to_le16(0x0002);
718 info("%s: allmulti set", netdev->name);
719 } else {
720 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
721 dev->rx_creg &= cpu_to_le16(0x00fc);
722 }
723 async_set_registers(dev, RCR, 2);
724 netif_wake_queue(netdev);
725 }
726
727 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
728 {
729 rtl8150_t *dev = netdev_priv(netdev);
730 int count, res;
731
732 netif_stop_queue(netdev);
733 count = (skb->len < 60) ? 60 : skb->len;
734 count = (count & 0x3f) ? count : count + 1;
735 dev->tx_skb = skb;
736 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
737 skb->data, count, write_bulk_callback, dev);
738 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
739 /* Can we get/handle EPIPE here? */
740 if (res == -ENODEV)
741 netif_device_detach(dev->netdev);
742 else {
743 warn("failed tx_urb %d\n", res);
744 dev->stats.tx_errors++;
745 netif_start_queue(netdev);
746 }
747 } else {
748 dev->stats.tx_packets++;
749 dev->stats.tx_bytes += skb->len;
750 netdev->trans_start = jiffies;
751 }
752
753 return 0;
754 }
755
756
757 static void set_carrier(struct net_device *netdev)
758 {
759 rtl8150_t *dev = netdev_priv(netdev);
760 short tmp;
761
762 get_registers(dev, CSCR, 2, &tmp);
763 if (tmp & CSCR_LINK_STATUS)
764 netif_carrier_on(netdev);
765 else
766 netif_carrier_off(netdev);
767 }
768
769 static int rtl8150_open(struct net_device *netdev)
770 {
771 rtl8150_t *dev = netdev_priv(netdev);
772 int res;
773
774 if (dev->rx_skb == NULL)
775 dev->rx_skb = pull_skb(dev);
776 if (!dev->rx_skb)
777 return -ENOMEM;
778
779 set_registers(dev, IDR, 6, netdev->dev_addr);
780
781 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
782 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
783 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
784 if (res == -ENODEV)
785 netif_device_detach(dev->netdev);
786 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
787 return res;
788 }
789 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
790 dev->intr_buff, INTBUFSIZE, intr_callback,
791 dev, dev->intr_interval);
792 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
793 if (res == -ENODEV)
794 netif_device_detach(dev->netdev);
795 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
796 usb_kill_urb(dev->rx_urb);
797 return res;
798 }
799 enable_net_traffic(dev);
800 set_carrier(netdev);
801 netif_start_queue(netdev);
802
803 return res;
804 }
805
806 static int rtl8150_close(struct net_device *netdev)
807 {
808 rtl8150_t *dev = netdev_priv(netdev);
809 int res = 0;
810
811 netif_stop_queue(netdev);
812 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
813 disable_net_traffic(dev);
814 unlink_all_urbs(dev);
815
816 return res;
817 }
818
819 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
820 {
821 rtl8150_t *dev = netdev_priv(netdev);
822
823 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
824 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
825 usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
826 }
827
828 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
829 {
830 rtl8150_t *dev = netdev_priv(netdev);
831 short lpa, bmcr;
832
833 ecmd->supported = (SUPPORTED_10baseT_Half |
834 SUPPORTED_10baseT_Full |
835 SUPPORTED_100baseT_Half |
836 SUPPORTED_100baseT_Full |
837 SUPPORTED_Autoneg |
838 SUPPORTED_TP | SUPPORTED_MII);
839 ecmd->port = PORT_TP;
840 ecmd->transceiver = XCVR_INTERNAL;
841 ecmd->phy_address = dev->phy;
842 get_registers(dev, BMCR, 2, &bmcr);
843 get_registers(dev, ANLP, 2, &lpa);
844 if (bmcr & BMCR_ANENABLE) {
845 ecmd->autoneg = AUTONEG_ENABLE;
846 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
847 SPEED_100 : SPEED_10;
848 if (ecmd->speed == SPEED_100)
849 ecmd->duplex = (lpa & LPA_100FULL) ?
850 DUPLEX_FULL : DUPLEX_HALF;
851 else
852 ecmd->duplex = (lpa & LPA_10FULL) ?
853 DUPLEX_FULL : DUPLEX_HALF;
854 } else {
855 ecmd->autoneg = AUTONEG_DISABLE;
856 ecmd->speed = (bmcr & BMCR_SPEED100) ?
857 SPEED_100 : SPEED_10;
858 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
859 DUPLEX_FULL : DUPLEX_HALF;
860 }
861 return 0;
862 }
863
864 static struct ethtool_ops ops = {
865 .get_drvinfo = rtl8150_get_drvinfo,
866 .get_settings = rtl8150_get_settings,
867 .get_link = ethtool_op_get_link
868 };
869
870 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
871 {
872 rtl8150_t *dev = netdev_priv(netdev);
873 u16 *data = (u16 *) & rq->ifr_ifru;
874 int res = 0;
875
876 switch (cmd) {
877 case SIOCDEVPRIVATE:
878 data[0] = dev->phy;
879 case SIOCDEVPRIVATE + 1:
880 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
881 break;
882 case SIOCDEVPRIVATE + 2:
883 if (!capable(CAP_NET_ADMIN))
884 return -EPERM;
885 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
886 break;
887 default:
888 res = -EOPNOTSUPP;
889 }
890
891 return res;
892 }
893
894 static int rtl8150_probe(struct usb_interface *intf,
895 const struct usb_device_id *id)
896 {
897 struct usb_device *udev = interface_to_usbdev(intf);
898 rtl8150_t *dev;
899 struct net_device *netdev;
900
901 netdev = alloc_etherdev(sizeof(rtl8150_t));
902 if (!netdev) {
903 err("Out of memory");
904 return -ENOMEM;
905 }
906
907 dev = netdev_priv(netdev);
908
909 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
910 if (!dev->intr_buff) {
911 free_netdev(netdev);
912 return -ENOMEM;
913 }
914
915 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
916 spin_lock_init(&dev->rx_pool_lock);
917
918 dev->udev = udev;
919 dev->netdev = netdev;
920 netdev->open = rtl8150_open;
921 netdev->stop = rtl8150_close;
922 netdev->do_ioctl = rtl8150_ioctl;
923 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
924 netdev->tx_timeout = rtl8150_tx_timeout;
925 netdev->hard_start_xmit = rtl8150_start_xmit;
926 netdev->set_multicast_list = rtl8150_set_multicast;
927 netdev->set_mac_address = rtl8150_set_mac_address;
928 netdev->get_stats = rtl8150_netdev_stats;
929 netdev->mtu = RTL8150_MTU;
930 SET_ETHTOOL_OPS(netdev, &ops);
931 dev->intr_interval = 100; /* 100ms */
932
933 if (!alloc_all_urbs(dev)) {
934 err("out of memory");
935 goto out;
936 }
937 if (!rtl8150_reset(dev)) {
938 err("couldn't reset the device");
939 goto out1;
940 }
941 fill_skb_pool(dev);
942 set_ethernet_addr(dev);
943
944 usb_set_intfdata(intf, dev);
945 SET_NETDEV_DEV(netdev, &intf->dev);
946 if (register_netdev(netdev) != 0) {
947 err("couldn't register the device");
948 goto out2;
949 }
950
951 info("%s: rtl8150 is detected", netdev->name);
952
953 return 0;
954
955 out2:
956 usb_set_intfdata(intf, NULL);
957 free_skb_pool(dev);
958 out1:
959 free_all_urbs(dev);
960 out:
961 kfree(dev->intr_buff);
962 free_netdev(netdev);
963 return -EIO;
964 }
965
966 static void rtl8150_disconnect(struct usb_interface *intf)
967 {
968 rtl8150_t *dev = usb_get_intfdata(intf);
969
970 usb_set_intfdata(intf, NULL);
971 if (dev) {
972 set_bit(RTL8150_UNPLUG, &dev->flags);
973 tasklet_disable(&dev->tl);
974 tasklet_kill(&dev->tl);
975 unregister_netdev(dev->netdev);
976 unlink_all_urbs(dev);
977 free_all_urbs(dev);
978 free_skb_pool(dev);
979 if (dev->rx_skb)
980 dev_kfree_skb(dev->rx_skb);
981 kfree(dev->intr_buff);
982 free_netdev(dev->netdev);
983 }
984 }
985
986 static int __init usb_rtl8150_init(void)
987 {
988 info(DRIVER_DESC " " DRIVER_VERSION);
989 return usb_register(&rtl8150_driver);
990 }
991
992 static void __exit usb_rtl8150_exit(void)
993 {
994 usb_deregister(&rtl8150_driver);
995 }
996
997 module_init(usb_rtl8150_init);
998 module_exit(usb_rtl8150_exit);
999
1000 MODULE_AUTHOR(DRIVER_AUTHOR);
1001 MODULE_DESCRIPTION(DRIVER_DESC);
1002 MODULE_LICENSE("GPL");
WRT350N Kernel Patches