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usb: Don't disable Latency tolerance Messaging (LTM) before port reset
[mirror_ubuntu-bionic-kernel.git] / drivers / net / usb / rtl8150.c
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/signal.h>
10 #include <linux/slab.h>
11 #include <linux/module.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/mii.h>
15 #include <linux/ethtool.h>
16 #include <linux/usb.h>
17 #include <linux/uaccess.h>
18
19 /* Version Information */
20 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
21 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
23
24 #define IDR 0x0120
25 #define MAR 0x0126
26 #define CR 0x012e
27 #define TCR 0x012f
28 #define RCR 0x0130
29 #define TSR 0x0132
30 #define RSR 0x0133
31 #define CON0 0x0135
32 #define CON1 0x0136
33 #define MSR 0x0137
34 #define PHYADD 0x0138
35 #define PHYDAT 0x0139
36 #define PHYCNT 0x013b
37 #define GPPC 0x013d
38 #define BMCR 0x0140
39 #define BMSR 0x0142
40 #define ANAR 0x0144
41 #define ANLP 0x0146
42 #define AER 0x0148
43 #define CSCR 0x014C /* This one has the link status */
44 #define CSCR_LINK_STATUS (1 << 3)
45
46 #define IDR_EEPROM 0x1202
47
48 #define PHY_READ 0
49 #define PHY_WRITE 0x20
50 #define PHY_GO 0x40
51
52 #define MII_TIMEOUT 10
53 #define INTBUFSIZE 8
54
55 #define RTL8150_REQT_READ 0xc0
56 #define RTL8150_REQT_WRITE 0x40
57 #define RTL8150_REQ_GET_REGS 0x05
58 #define RTL8150_REQ_SET_REGS 0x05
59
60
61 /* Transmit status register errors */
62 #define TSR_ECOL (1<<5)
63 #define TSR_LCOL (1<<4)
64 #define TSR_LOSS_CRS (1<<3)
65 #define TSR_JBR (1<<2)
66 #define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
67 /* Receive status register errors */
68 #define RSR_CRC (1<<2)
69 #define RSR_FAE (1<<1)
70 #define RSR_ERRORS (RSR_CRC | RSR_FAE)
71
72 /* Media status register definitions */
73 #define MSR_DUPLEX (1<<4)
74 #define MSR_SPEED (1<<3)
75 #define MSR_LINK (1<<2)
76
77 /* Interrupt pipe data */
78 #define INT_TSR 0x00
79 #define INT_RSR 0x01
80 #define INT_MSR 0x02
81 #define INT_WAKSR 0x03
82 #define INT_TXOK_CNT 0x04
83 #define INT_RXLOST_CNT 0x05
84 #define INT_CRERR_CNT 0x06
85 #define INT_COL_CNT 0x07
86
87
88 #define RTL8150_MTU 1540
89 #define RTL8150_TX_TIMEOUT (HZ)
90 #define RX_SKB_POOL_SIZE 4
91
92 /* rtl8150 flags */
93 #define RTL8150_HW_CRC 0
94 #define RX_REG_SET 1
95 #define RTL8150_UNPLUG 2
96 #define RX_URB_FAIL 3
97
98 /* Define these values to match your device */
99 #define VENDOR_ID_REALTEK 0x0bda
100 #define VENDOR_ID_MELCO 0x0411
101 #define VENDOR_ID_MICRONET 0x3980
102 #define VENDOR_ID_LONGSHINE 0x07b8
103 #define VENDOR_ID_OQO 0x1557
104 #define VENDOR_ID_ZYXEL 0x0586
105
106 #define PRODUCT_ID_RTL8150 0x8150
107 #define PRODUCT_ID_LUAKTX 0x0012
108 #define PRODUCT_ID_LCS8138TX 0x401a
109 #define PRODUCT_ID_SP128AR 0x0003
110 #define PRODUCT_ID_PRESTIGE 0x401a
111
112 #undef EEPROM_WRITE
113
114 /* table of devices that work with this driver */
115 static const struct usb_device_id rtl8150_table[] = {
116 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
117 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
118 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
119 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
120 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
121 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
122 {}
123 };
124
125 MODULE_DEVICE_TABLE(usb, rtl8150_table);
126
127 struct rtl8150 {
128 unsigned long flags;
129 struct usb_device *udev;
130 struct tasklet_struct tl;
131 struct net_device *netdev;
132 struct urb *rx_urb, *tx_urb, *intr_urb;
133 struct sk_buff *tx_skb, *rx_skb;
134 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
135 spinlock_t rx_pool_lock;
136 struct usb_ctrlrequest dr;
137 int intr_interval;
138 u8 *intr_buff;
139 u8 phy;
140 };
141
142 typedef struct rtl8150 rtl8150_t;
143
144 struct async_req {
145 struct usb_ctrlrequest dr;
146 u16 rx_creg;
147 };
148
149 static const char driver_name [] = "rtl8150";
150
151 /*
152 **
153 ** device related part of the code
154 **
155 */
156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
157 {
158 void *buf;
159 int ret;
160
161 buf = kmalloc(size, GFP_NOIO);
162 if (!buf)
163 return -ENOMEM;
164
165 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
166 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
167 indx, 0, buf, size, 500);
168 if (ret > 0 && ret <= size)
169 memcpy(data, buf, ret);
170 kfree(buf);
171 return ret;
172 }
173
174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
175 {
176 void *buf;
177 int ret;
178
179 buf = kmemdup(data, size, GFP_NOIO);
180 if (!buf)
181 return -ENOMEM;
182
183 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
184 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
185 indx, 0, buf, size, 500);
186 kfree(buf);
187 return ret;
188 }
189
190 static void async_set_reg_cb(struct urb *urb)
191 {
192 struct async_req *req = (struct async_req *)urb->context;
193 int status = urb->status;
194
195 if (status < 0)
196 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
197 kfree(req);
198 usb_free_urb(urb);
199 }
200
201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
202 {
203 int res = -ENOMEM;
204 struct urb *async_urb;
205 struct async_req *req;
206
207 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
208 if (req == NULL)
209 return res;
210 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
211 if (async_urb == NULL) {
212 kfree(req);
213 return res;
214 }
215 req->rx_creg = cpu_to_le16(reg);
216 req->dr.bRequestType = RTL8150_REQT_WRITE;
217 req->dr.bRequest = RTL8150_REQ_SET_REGS;
218 req->dr.wIndex = 0;
219 req->dr.wValue = cpu_to_le16(indx);
220 req->dr.wLength = cpu_to_le16(size);
221 usb_fill_control_urb(async_urb, dev->udev,
222 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
223 &req->rx_creg, size, async_set_reg_cb, req);
224 res = usb_submit_urb(async_urb, GFP_ATOMIC);
225 if (res) {
226 if (res == -ENODEV)
227 netif_device_detach(dev->netdev);
228 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
229 }
230 return res;
231 }
232
233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
234 {
235 int i;
236 u8 data[3], tmp;
237
238 data[0] = phy;
239 data[1] = data[2] = 0;
240 tmp = indx | PHY_READ | PHY_GO;
241 i = 0;
242
243 set_registers(dev, PHYADD, sizeof(data), data);
244 set_registers(dev, PHYCNT, 1, &tmp);
245 do {
246 get_registers(dev, PHYCNT, 1, data);
247 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
248
249 if (i <= MII_TIMEOUT) {
250 get_registers(dev, PHYDAT, 2, data);
251 *reg = data[0] | (data[1] << 8);
252 return 0;
253 } else
254 return 1;
255 }
256
257 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
258 {
259 int i;
260 u8 data[3], tmp;
261
262 data[0] = phy;
263 data[1] = reg & 0xff;
264 data[2] = (reg >> 8) & 0xff;
265 tmp = indx | PHY_WRITE | PHY_GO;
266 i = 0;
267
268 set_registers(dev, PHYADD, sizeof(data), data);
269 set_registers(dev, PHYCNT, 1, &tmp);
270 do {
271 get_registers(dev, PHYCNT, 1, data);
272 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
273
274 if (i <= MII_TIMEOUT)
275 return 0;
276 else
277 return 1;
278 }
279
280 static inline void set_ethernet_addr(rtl8150_t * dev)
281 {
282 u8 node_id[6];
283
284 get_registers(dev, IDR, sizeof(node_id), node_id);
285 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
286 }
287
288 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
289 {
290 struct sockaddr *addr = p;
291 rtl8150_t *dev = netdev_priv(netdev);
292
293 if (netif_running(netdev))
294 return -EBUSY;
295
296 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
297 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
298 /* Set the IDR registers. */
299 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
300 #ifdef EEPROM_WRITE
301 {
302 int i;
303 u8 cr;
304 /* Get the CR contents. */
305 get_registers(dev, CR, 1, &cr);
306 /* Set the WEPROM bit (eeprom write enable). */
307 cr |= 0x20;
308 set_registers(dev, CR, 1, &cr);
309 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
310 so we need to split them up. */
311 for (i = 0; i * 2 < netdev->addr_len; i++) {
312 set_registers(dev, IDR_EEPROM + (i * 2), 2,
313 netdev->dev_addr + (i * 2));
314 }
315 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
316 cr &= 0xdf;
317 set_registers(dev, CR, 1, &cr);
318 }
319 #endif
320 return 0;
321 }
322
323 static int rtl8150_reset(rtl8150_t * dev)
324 {
325 u8 data = 0x10;
326 int i = HZ;
327
328 set_registers(dev, CR, 1, &data);
329 do {
330 get_registers(dev, CR, 1, &data);
331 } while ((data & 0x10) && --i);
332
333 return (i > 0) ? 1 : 0;
334 }
335
336 static int alloc_all_urbs(rtl8150_t * dev)
337 {
338 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
339 if (!dev->rx_urb)
340 return 0;
341 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
342 if (!dev->tx_urb) {
343 usb_free_urb(dev->rx_urb);
344 return 0;
345 }
346 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
347 if (!dev->intr_urb) {
348 usb_free_urb(dev->rx_urb);
349 usb_free_urb(dev->tx_urb);
350 return 0;
351 }
352
353 return 1;
354 }
355
356 static void free_all_urbs(rtl8150_t * dev)
357 {
358 usb_free_urb(dev->rx_urb);
359 usb_free_urb(dev->tx_urb);
360 usb_free_urb(dev->intr_urb);
361 }
362
363 static void unlink_all_urbs(rtl8150_t * dev)
364 {
365 usb_kill_urb(dev->rx_urb);
366 usb_kill_urb(dev->tx_urb);
367 usb_kill_urb(dev->intr_urb);
368 }
369
370 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
371 {
372 struct sk_buff *skb;
373 int i;
374
375 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
376 if (dev->rx_skb_pool[i]) {
377 skb = dev->rx_skb_pool[i];
378 dev->rx_skb_pool[i] = NULL;
379 return skb;
380 }
381 }
382 return NULL;
383 }
384
385 static void read_bulk_callback(struct urb *urb)
386 {
387 rtl8150_t *dev;
388 unsigned pkt_len, res;
389 struct sk_buff *skb;
390 struct net_device *netdev;
391 u16 rx_stat;
392 int status = urb->status;
393 int result;
394
395 dev = urb->context;
396 if (!dev)
397 return;
398 if (test_bit(RTL8150_UNPLUG, &dev->flags))
399 return;
400 netdev = dev->netdev;
401 if (!netif_device_present(netdev))
402 return;
403
404 switch (status) {
405 case 0:
406 break;
407 case -ENOENT:
408 return; /* the urb is in unlink state */
409 case -ETIME:
410 if (printk_ratelimit())
411 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
412 goto goon;
413 default:
414 if (printk_ratelimit())
415 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
416 goto goon;
417 }
418
419 if (!dev->rx_skb)
420 goto resched;
421 /* protect against short packets (tell me why we got some?!?) */
422 if (urb->actual_length < 4)
423 goto goon;
424
425 res = urb->actual_length;
426 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
427 pkt_len = res - 4;
428
429 skb_put(dev->rx_skb, pkt_len);
430 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
431 netif_rx(dev->rx_skb);
432 netdev->stats.rx_packets++;
433 netdev->stats.rx_bytes += pkt_len;
434
435 spin_lock(&dev->rx_pool_lock);
436 skb = pull_skb(dev);
437 spin_unlock(&dev->rx_pool_lock);
438 if (!skb)
439 goto resched;
440
441 dev->rx_skb = skb;
442 goon:
443 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
444 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
445 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
446 if (result == -ENODEV)
447 netif_device_detach(dev->netdev);
448 else if (result) {
449 set_bit(RX_URB_FAIL, &dev->flags);
450 goto resched;
451 } else {
452 clear_bit(RX_URB_FAIL, &dev->flags);
453 }
454
455 return;
456 resched:
457 tasklet_schedule(&dev->tl);
458 }
459
460 static void write_bulk_callback(struct urb *urb)
461 {
462 rtl8150_t *dev;
463 int status = urb->status;
464
465 dev = urb->context;
466 if (!dev)
467 return;
468 dev_kfree_skb_irq(dev->tx_skb);
469 if (!netif_device_present(dev->netdev))
470 return;
471 if (status)
472 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
473 dev->netdev->name, status);
474 netif_trans_update(dev->netdev);
475 netif_wake_queue(dev->netdev);
476 }
477
478 static void intr_callback(struct urb *urb)
479 {
480 rtl8150_t *dev;
481 __u8 *d;
482 int status = urb->status;
483 int res;
484
485 dev = urb->context;
486 if (!dev)
487 return;
488 switch (status) {
489 case 0: /* success */
490 break;
491 case -ECONNRESET: /* unlink */
492 case -ENOENT:
493 case -ESHUTDOWN:
494 return;
495 /* -EPIPE: should clear the halt */
496 default:
497 dev_info(&urb->dev->dev, "%s: intr status %d\n",
498 dev->netdev->name, status);
499 goto resubmit;
500 }
501
502 d = urb->transfer_buffer;
503 if (d[0] & TSR_ERRORS) {
504 dev->netdev->stats.tx_errors++;
505 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
506 dev->netdev->stats.tx_aborted_errors++;
507 if (d[INT_TSR] & TSR_LCOL)
508 dev->netdev->stats.tx_window_errors++;
509 if (d[INT_TSR] & TSR_LOSS_CRS)
510 dev->netdev->stats.tx_carrier_errors++;
511 }
512 /* Report link status changes to the network stack */
513 if ((d[INT_MSR] & MSR_LINK) == 0) {
514 if (netif_carrier_ok(dev->netdev)) {
515 netif_carrier_off(dev->netdev);
516 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
517 }
518 } else {
519 if (!netif_carrier_ok(dev->netdev)) {
520 netif_carrier_on(dev->netdev);
521 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
522 }
523 }
524
525 resubmit:
526 res = usb_submit_urb (urb, GFP_ATOMIC);
527 if (res == -ENODEV)
528 netif_device_detach(dev->netdev);
529 else if (res)
530 dev_err(&dev->udev->dev,
531 "can't resubmit intr, %s-%s/input0, status %d\n",
532 dev->udev->bus->bus_name, dev->udev->devpath, res);
533 }
534
535 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
536 {
537 rtl8150_t *dev = usb_get_intfdata(intf);
538
539 netif_device_detach(dev->netdev);
540
541 if (netif_running(dev->netdev)) {
542 usb_kill_urb(dev->rx_urb);
543 usb_kill_urb(dev->intr_urb);
544 }
545 return 0;
546 }
547
548 static int rtl8150_resume(struct usb_interface *intf)
549 {
550 rtl8150_t *dev = usb_get_intfdata(intf);
551
552 netif_device_attach(dev->netdev);
553 if (netif_running(dev->netdev)) {
554 dev->rx_urb->status = 0;
555 dev->rx_urb->actual_length = 0;
556 read_bulk_callback(dev->rx_urb);
557
558 dev->intr_urb->status = 0;
559 dev->intr_urb->actual_length = 0;
560 intr_callback(dev->intr_urb);
561 }
562 return 0;
563 }
564
565 /*
566 **
567 ** network related part of the code
568 **
569 */
570
571 static void fill_skb_pool(rtl8150_t *dev)
572 {
573 struct sk_buff *skb;
574 int i;
575
576 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
577 if (dev->rx_skb_pool[i])
578 continue;
579 skb = dev_alloc_skb(RTL8150_MTU + 2);
580 if (!skb) {
581 return;
582 }
583 skb_reserve(skb, 2);
584 dev->rx_skb_pool[i] = skb;
585 }
586 }
587
588 static void free_skb_pool(rtl8150_t *dev)
589 {
590 int i;
591
592 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
593 if (dev->rx_skb_pool[i])
594 dev_kfree_skb(dev->rx_skb_pool[i]);
595 }
596
597 static void rx_fixup(unsigned long data)
598 {
599 struct rtl8150 *dev = (struct rtl8150 *)data;
600 struct sk_buff *skb;
601 int status;
602
603 spin_lock_irq(&dev->rx_pool_lock);
604 fill_skb_pool(dev);
605 spin_unlock_irq(&dev->rx_pool_lock);
606 if (test_bit(RX_URB_FAIL, &dev->flags))
607 if (dev->rx_skb)
608 goto try_again;
609 spin_lock_irq(&dev->rx_pool_lock);
610 skb = pull_skb(dev);
611 spin_unlock_irq(&dev->rx_pool_lock);
612 if (skb == NULL)
613 goto tlsched;
614 dev->rx_skb = skb;
615 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
616 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
617 try_again:
618 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
619 if (status == -ENODEV) {
620 netif_device_detach(dev->netdev);
621 } else if (status) {
622 set_bit(RX_URB_FAIL, &dev->flags);
623 goto tlsched;
624 } else {
625 clear_bit(RX_URB_FAIL, &dev->flags);
626 }
627
628 return;
629 tlsched:
630 tasklet_schedule(&dev->tl);
631 }
632
633 static int enable_net_traffic(rtl8150_t * dev)
634 {
635 u8 cr, tcr, rcr, msr;
636
637 if (!rtl8150_reset(dev)) {
638 dev_warn(&dev->udev->dev, "device reset failed\n");
639 }
640 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
641 rcr = 0x9e;
642 tcr = 0xd8;
643 cr = 0x0c;
644 if (!(rcr & 0x80))
645 set_bit(RTL8150_HW_CRC, &dev->flags);
646 set_registers(dev, RCR, 1, &rcr);
647 set_registers(dev, TCR, 1, &tcr);
648 set_registers(dev, CR, 1, &cr);
649 get_registers(dev, MSR, 1, &msr);
650
651 return 0;
652 }
653
654 static void disable_net_traffic(rtl8150_t * dev)
655 {
656 u8 cr;
657
658 get_registers(dev, CR, 1, &cr);
659 cr &= 0xf3;
660 set_registers(dev, CR, 1, &cr);
661 }
662
663 static void rtl8150_tx_timeout(struct net_device *netdev)
664 {
665 rtl8150_t *dev = netdev_priv(netdev);
666 dev_warn(&netdev->dev, "Tx timeout.\n");
667 usb_unlink_urb(dev->tx_urb);
668 netdev->stats.tx_errors++;
669 }
670
671 static void rtl8150_set_multicast(struct net_device *netdev)
672 {
673 rtl8150_t *dev = netdev_priv(netdev);
674 u16 rx_creg = 0x9e;
675
676 netif_stop_queue(netdev);
677 if (netdev->flags & IFF_PROMISC) {
678 rx_creg |= 0x0001;
679 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
680 } else if (!netdev_mc_empty(netdev) ||
681 (netdev->flags & IFF_ALLMULTI)) {
682 rx_creg &= 0xfffe;
683 rx_creg |= 0x0002;
684 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
685 } else {
686 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
687 rx_creg &= 0x00fc;
688 }
689 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
690 netif_wake_queue(netdev);
691 }
692
693 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
694 struct net_device *netdev)
695 {
696 rtl8150_t *dev = netdev_priv(netdev);
697 int count, res;
698
699 netif_stop_queue(netdev);
700 count = (skb->len < 60) ? 60 : skb->len;
701 count = (count & 0x3f) ? count : count + 1;
702 dev->tx_skb = skb;
703 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
704 skb->data, count, write_bulk_callback, dev);
705 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
706 /* Can we get/handle EPIPE here? */
707 if (res == -ENODEV)
708 netif_device_detach(dev->netdev);
709 else {
710 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
711 netdev->stats.tx_errors++;
712 netif_start_queue(netdev);
713 }
714 } else {
715 netdev->stats.tx_packets++;
716 netdev->stats.tx_bytes += skb->len;
717 netif_trans_update(netdev);
718 }
719
720 return NETDEV_TX_OK;
721 }
722
723
724 static void set_carrier(struct net_device *netdev)
725 {
726 rtl8150_t *dev = netdev_priv(netdev);
727 short tmp;
728
729 get_registers(dev, CSCR, 2, &tmp);
730 if (tmp & CSCR_LINK_STATUS)
731 netif_carrier_on(netdev);
732 else
733 netif_carrier_off(netdev);
734 }
735
736 static int rtl8150_open(struct net_device *netdev)
737 {
738 rtl8150_t *dev = netdev_priv(netdev);
739 int res;
740
741 if (dev->rx_skb == NULL)
742 dev->rx_skb = pull_skb(dev);
743 if (!dev->rx_skb)
744 return -ENOMEM;
745
746 set_registers(dev, IDR, 6, netdev->dev_addr);
747
748 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
749 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
750 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
751 if (res == -ENODEV)
752 netif_device_detach(dev->netdev);
753 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
754 return res;
755 }
756 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
757 dev->intr_buff, INTBUFSIZE, intr_callback,
758 dev, dev->intr_interval);
759 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
760 if (res == -ENODEV)
761 netif_device_detach(dev->netdev);
762 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
763 usb_kill_urb(dev->rx_urb);
764 return res;
765 }
766 enable_net_traffic(dev);
767 set_carrier(netdev);
768 netif_start_queue(netdev);
769
770 return res;
771 }
772
773 static int rtl8150_close(struct net_device *netdev)
774 {
775 rtl8150_t *dev = netdev_priv(netdev);
776
777 netif_stop_queue(netdev);
778 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
779 disable_net_traffic(dev);
780 unlink_all_urbs(dev);
781
782 return 0;
783 }
784
785 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
786 {
787 rtl8150_t *dev = netdev_priv(netdev);
788
789 strlcpy(info->driver, driver_name, sizeof(info->driver));
790 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
791 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
792 }
793
794 static int rtl8150_get_link_ksettings(struct net_device *netdev,
795 struct ethtool_link_ksettings *ecmd)
796 {
797 rtl8150_t *dev = netdev_priv(netdev);
798 short lpa, bmcr;
799 u32 supported;
800
801 supported = (SUPPORTED_10baseT_Half |
802 SUPPORTED_10baseT_Full |
803 SUPPORTED_100baseT_Half |
804 SUPPORTED_100baseT_Full |
805 SUPPORTED_Autoneg |
806 SUPPORTED_TP | SUPPORTED_MII);
807 ecmd->base.port = PORT_TP;
808 ecmd->base.phy_address = dev->phy;
809 get_registers(dev, BMCR, 2, &bmcr);
810 get_registers(dev, ANLP, 2, &lpa);
811 if (bmcr & BMCR_ANENABLE) {
812 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
813 SPEED_100 : SPEED_10);
814 ecmd->base.speed = speed;
815 ecmd->base.autoneg = AUTONEG_ENABLE;
816 if (speed == SPEED_100)
817 ecmd->base.duplex = (lpa & LPA_100FULL) ?
818 DUPLEX_FULL : DUPLEX_HALF;
819 else
820 ecmd->base.duplex = (lpa & LPA_10FULL) ?
821 DUPLEX_FULL : DUPLEX_HALF;
822 } else {
823 ecmd->base.autoneg = AUTONEG_DISABLE;
824 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
825 SPEED_100 : SPEED_10);
826 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
827 DUPLEX_FULL : DUPLEX_HALF;
828 }
829
830 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
831 supported);
832
833 return 0;
834 }
835
836 static const struct ethtool_ops ops = {
837 .get_drvinfo = rtl8150_get_drvinfo,
838 .get_link = ethtool_op_get_link,
839 .get_link_ksettings = rtl8150_get_link_ksettings,
840 };
841
842 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
843 {
844 rtl8150_t *dev = netdev_priv(netdev);
845 u16 *data = (u16 *) & rq->ifr_ifru;
846 int res = 0;
847
848 switch (cmd) {
849 case SIOCDEVPRIVATE:
850 data[0] = dev->phy;
851 case SIOCDEVPRIVATE + 1:
852 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
853 break;
854 case SIOCDEVPRIVATE + 2:
855 if (!capable(CAP_NET_ADMIN))
856 return -EPERM;
857 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
858 break;
859 default:
860 res = -EOPNOTSUPP;
861 }
862
863 return res;
864 }
865
866 static const struct net_device_ops rtl8150_netdev_ops = {
867 .ndo_open = rtl8150_open,
868 .ndo_stop = rtl8150_close,
869 .ndo_do_ioctl = rtl8150_ioctl,
870 .ndo_start_xmit = rtl8150_start_xmit,
871 .ndo_tx_timeout = rtl8150_tx_timeout,
872 .ndo_set_rx_mode = rtl8150_set_multicast,
873 .ndo_set_mac_address = rtl8150_set_mac_address,
874
875 .ndo_validate_addr = eth_validate_addr,
876 };
877
878 static int rtl8150_probe(struct usb_interface *intf,
879 const struct usb_device_id *id)
880 {
881 struct usb_device *udev = interface_to_usbdev(intf);
882 rtl8150_t *dev;
883 struct net_device *netdev;
884
885 netdev = alloc_etherdev(sizeof(rtl8150_t));
886 if (!netdev)
887 return -ENOMEM;
888
889 dev = netdev_priv(netdev);
890
891 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
892 if (!dev->intr_buff) {
893 free_netdev(netdev);
894 return -ENOMEM;
895 }
896
897 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
898 spin_lock_init(&dev->rx_pool_lock);
899
900 dev->udev = udev;
901 dev->netdev = netdev;
902 netdev->netdev_ops = &rtl8150_netdev_ops;
903 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
904 netdev->ethtool_ops = &ops;
905 dev->intr_interval = 100; /* 100ms */
906
907 if (!alloc_all_urbs(dev)) {
908 dev_err(&intf->dev, "out of memory\n");
909 goto out;
910 }
911 if (!rtl8150_reset(dev)) {
912 dev_err(&intf->dev, "couldn't reset the device\n");
913 goto out1;
914 }
915 fill_skb_pool(dev);
916 set_ethernet_addr(dev);
917
918 usb_set_intfdata(intf, dev);
919 SET_NETDEV_DEV(netdev, &intf->dev);
920 if (register_netdev(netdev) != 0) {
921 dev_err(&intf->dev, "couldn't register the device\n");
922 goto out2;
923 }
924
925 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
926
927 return 0;
928
929 out2:
930 usb_set_intfdata(intf, NULL);
931 free_skb_pool(dev);
932 out1:
933 free_all_urbs(dev);
934 out:
935 kfree(dev->intr_buff);
936 free_netdev(netdev);
937 return -EIO;
938 }
939
940 static void rtl8150_disconnect(struct usb_interface *intf)
941 {
942 rtl8150_t *dev = usb_get_intfdata(intf);
943
944 usb_set_intfdata(intf, NULL);
945 if (dev) {
946 set_bit(RTL8150_UNPLUG, &dev->flags);
947 tasklet_kill(&dev->tl);
948 unregister_netdev(dev->netdev);
949 unlink_all_urbs(dev);
950 free_all_urbs(dev);
951 free_skb_pool(dev);
952 if (dev->rx_skb)
953 dev_kfree_skb(dev->rx_skb);
954 kfree(dev->intr_buff);
955 free_netdev(dev->netdev);
956 }
957 }
958
959 static struct usb_driver rtl8150_driver = {
960 .name = driver_name,
961 .probe = rtl8150_probe,
962 .disconnect = rtl8150_disconnect,
963 .id_table = rtl8150_table,
964 .suspend = rtl8150_suspend,
965 .resume = rtl8150_resume,
966 .disable_hub_initiated_lpm = 1,
967 };
968
969 module_usb_driver(rtl8150_driver);
970
971 MODULE_AUTHOR(DRIVER_AUTHOR);
972 MODULE_DESCRIPTION(DRIVER_DESC);
973 MODULE_LICENSE("GPL");
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