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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / usb / rtl8150.c
blobe7c630d375899ba3f94176b053c0b11e864c1c3d
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
4 */
5
6 #include <linux/signal.h>
7 #include <linux/slab.h>
8 #include <linux/module.h>
9 #include <linux/netdevice.h>
10 #include <linux/etherdevice.h>
11 #include <linux/mii.h>
12 #include <linux/ethtool.h>
13 #include <linux/usb.h>
14 #include <linux/uaccess.h>
15
16 /* Version Information */
17 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
18 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
19 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
20
21 #define IDR 0x0120
22 #define MAR 0x0126
23 #define CR 0x012e
24 #define TCR 0x012f
25 #define RCR 0x0130
26 #define TSR 0x0132
27 #define RSR 0x0133
28 #define CON0 0x0135
29 #define CON1 0x0136
30 #define MSR 0x0137
31 #define PHYADD 0x0138
32 #define PHYDAT 0x0139
33 #define PHYCNT 0x013b
34 #define GPPC 0x013d
35 #define BMCR 0x0140
36 #define BMSR 0x0142
37 #define ANAR 0x0144
38 #define ANLP 0x0146
39 #define AER 0x0148
40 #define CSCR 0x014C /* This one has the link status */
41 #define CSCR_LINK_STATUS (1 << 3)
42
43 #define IDR_EEPROM 0x1202
44
45 #define PHY_READ 0
46 #define PHY_WRITE 0x20
47 #define PHY_GO 0x40
48
49 #define MII_TIMEOUT 10
50 #define INTBUFSIZE 8
51
52 #define RTL8150_REQT_READ 0xc0
53 #define RTL8150_REQT_WRITE 0x40
54 #define RTL8150_REQ_GET_REGS 0x05
55 #define RTL8150_REQ_SET_REGS 0x05
56
57
58 /* Transmit status register errors */
59 #define TSR_ECOL (1<<5)
60 #define TSR_LCOL (1<<4)
61 #define TSR_LOSS_CRS (1<<3)
62 #define TSR_JBR (1<<2)
63 #define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
64 /* Receive status register errors */
65 #define RSR_CRC (1<<2)
66 #define RSR_FAE (1<<1)
67 #define RSR_ERRORS (RSR_CRC | RSR_FAE)
68
69 /* Media status register definitions */
70 #define MSR_DUPLEX (1<<4)
71 #define MSR_SPEED (1<<3)
72 #define MSR_LINK (1<<2)
73
74 /* Interrupt pipe data */
75 #define INT_TSR 0x00
76 #define INT_RSR 0x01
77 #define INT_MSR 0x02
78 #define INT_WAKSR 0x03
79 #define INT_TXOK_CNT 0x04
80 #define INT_RXLOST_CNT 0x05
81 #define INT_CRERR_CNT 0x06
82 #define INT_COL_CNT 0x07
83
84
85 #define RTL8150_MTU 1540
86 #define RTL8150_TX_TIMEOUT (HZ)
87 #define RX_SKB_POOL_SIZE 4
88
89 /* rtl8150 flags */
90 #define RTL8150_HW_CRC 0
91 #define RX_REG_SET 1
92 #define RTL8150_UNPLUG 2
93 #define RX_URB_FAIL 3
94
95 /* Define these values to match your device */
96 #define VENDOR_ID_REALTEK 0x0bda
97 #define VENDOR_ID_MELCO 0x0411
98 #define VENDOR_ID_MICRONET 0x3980
99 #define VENDOR_ID_LONGSHINE 0x07b8
100 #define VENDOR_ID_OQO 0x1557
101 #define VENDOR_ID_ZYXEL 0x0586
102
103 #define PRODUCT_ID_RTL8150 0x8150
104 #define PRODUCT_ID_LUAKTX 0x0012
105 #define PRODUCT_ID_LCS8138TX 0x401a
106 #define PRODUCT_ID_SP128AR 0x0003
107 #define PRODUCT_ID_PRESTIGE 0x401a
108
109 #undef EEPROM_WRITE
110
111 /* table of devices that work with this driver */
112 static const struct usb_device_id rtl8150_table[] = {
113 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
114 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
115 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
116 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
117 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
118 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
119 {}
120 };
121
122 MODULE_DEVICE_TABLE(usb, rtl8150_table);
123
124 struct rtl8150 {
125 unsigned long flags;
126 struct usb_device *udev;
127 struct tasklet_struct tl;
128 struct net_device *netdev;
129 struct urb *rx_urb, *tx_urb, *intr_urb;
130 struct sk_buff *tx_skb, *rx_skb;
131 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
132 spinlock_t rx_pool_lock;
133 struct usb_ctrlrequest dr;
134 int intr_interval;
135 u8 *intr_buff;
136 u8 phy;
137 };
138
139 typedef struct rtl8150 rtl8150_t;
140
141 struct async_req {
142 struct usb_ctrlrequest dr;
143 u16 rx_creg;
144 };
145
146 static const char driver_name [] = "rtl8150";
147
148 /*
149 **
150 ** device related part of the code
151 **
152 */
153 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
154 {
155 void *buf;
156 int ret;
157
158 buf = kmalloc(size, GFP_NOIO);
159 if (!buf)
160 return -ENOMEM;
161
162 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
163 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
164 indx, 0, buf, size, 500);
165 if (ret > 0 && ret <= size)
166 memcpy(data, buf, ret);
167 kfree(buf);
168 return ret;
169 }
170
171 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
172 {
173 void *buf;
174 int ret;
175
176 buf = kmemdup(data, size, GFP_NOIO);
177 if (!buf)
178 return -ENOMEM;
179
180 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
181 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
182 indx, 0, buf, size, 500);
183 kfree(buf);
184 return ret;
185 }
186
187 static void async_set_reg_cb(struct urb *urb)
188 {
189 struct async_req *req = (struct async_req *)urb->context;
190 int status = urb->status;
191
192 if (status < 0)
193 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
194 kfree(req);
195 usb_free_urb(urb);
196 }
197
198 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
199 {
200 int res = -ENOMEM;
201 struct urb *async_urb;
202 struct async_req *req;
203
204 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
205 if (req == NULL)
206 return res;
207 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
208 if (async_urb == NULL) {
209 kfree(req);
210 return res;
211 }
212 req->rx_creg = cpu_to_le16(reg);
213 req->dr.bRequestType = RTL8150_REQT_WRITE;
214 req->dr.bRequest = RTL8150_REQ_SET_REGS;
215 req->dr.wIndex = 0;
216 req->dr.wValue = cpu_to_le16(indx);
217 req->dr.wLength = cpu_to_le16(size);
218 usb_fill_control_urb(async_urb, dev->udev,
219 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
220 &req->rx_creg, size, async_set_reg_cb, req);
221 res = usb_submit_urb(async_urb, GFP_ATOMIC);
222 if (res) {
223 if (res == -ENODEV)
224 netif_device_detach(dev->netdev);
225 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
226 }
227 return res;
228 }
229
230 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
231 {
232 int i;
233 u8 data[3], tmp;
234
235 data[0] = phy;
236 data[1] = data[2] = 0;
237 tmp = indx | PHY_READ | PHY_GO;
238 i = 0;
239
240 set_registers(dev, PHYADD, sizeof(data), data);
241 set_registers(dev, PHYCNT, 1, &tmp);
242 do {
243 get_registers(dev, PHYCNT, 1, data);
244 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
245
246 if (i <= MII_TIMEOUT) {
247 get_registers(dev, PHYDAT, 2, data);
248 *reg = data[0] | (data[1] << 8);
249 return 0;
250 } else
251 return 1;
252 }
253
254 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
255 {
256 int i;
257 u8 data[3], tmp;
258
259 data[0] = phy;
260 data[1] = reg & 0xff;
261 data[2] = (reg >> 8) & 0xff;
262 tmp = indx | PHY_WRITE | PHY_GO;
263 i = 0;
264
265 set_registers(dev, PHYADD, sizeof(data), data);
266 set_registers(dev, PHYCNT, 1, &tmp);
267 do {
268 get_registers(dev, PHYCNT, 1, data);
269 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
270
271 if (i <= MII_TIMEOUT)
272 return 0;
273 else
274 return 1;
275 }
276
277 static inline void set_ethernet_addr(rtl8150_t * dev)
278 {
279 u8 node_id[6];
280
281 get_registers(dev, IDR, sizeof(node_id), node_id);
282 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
283 }
284
285 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
286 {
287 struct sockaddr *addr = p;
288 rtl8150_t *dev = netdev_priv(netdev);
289
290 if (netif_running(netdev))
291 return -EBUSY;
292
293 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
294 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
295 /* Set the IDR registers. */
296 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
297 #ifdef EEPROM_WRITE
298 {
299 int i;
300 u8 cr;
301 /* Get the CR contents. */
302 get_registers(dev, CR, 1, &cr);
303 /* Set the WEPROM bit (eeprom write enable). */
304 cr |= 0x20;
305 set_registers(dev, CR, 1, &cr);
306 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
307 so we need to split them up. */
308 for (i = 0; i * 2 < netdev->addr_len; i++) {
309 set_registers(dev, IDR_EEPROM + (i * 2), 2,
310 netdev->dev_addr + (i * 2));
311 }
312 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
313 cr &= 0xdf;
314 set_registers(dev, CR, 1, &cr);
315 }
316 #endif
317 return 0;
318 }
319
320 static int rtl8150_reset(rtl8150_t * dev)
321 {
322 u8 data = 0x10;
323 int i = HZ;
324
325 set_registers(dev, CR, 1, &data);
326 do {
327 get_registers(dev, CR, 1, &data);
328 } while ((data & 0x10) && --i);
329
330 return (i > 0) ? 1 : 0;
331 }
332
333 static int alloc_all_urbs(rtl8150_t * dev)
334 {
335 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
336 if (!dev->rx_urb)
337 return 0;
338 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
339 if (!dev->tx_urb) {
340 usb_free_urb(dev->rx_urb);
341 return 0;
342 }
343 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
344 if (!dev->intr_urb) {
345 usb_free_urb(dev->rx_urb);
346 usb_free_urb(dev->tx_urb);
347 return 0;
348 }
349
350 return 1;
351 }
352
353 static void free_all_urbs(rtl8150_t * dev)
354 {
355 usb_free_urb(dev->rx_urb);
356 usb_free_urb(dev->tx_urb);
357 usb_free_urb(dev->intr_urb);
358 }
359
360 static void unlink_all_urbs(rtl8150_t * dev)
361 {
362 usb_kill_urb(dev->rx_urb);
363 usb_kill_urb(dev->tx_urb);
364 usb_kill_urb(dev->intr_urb);
365 }
366
367 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
368 {
369 struct sk_buff *skb;
370 int i;
371
372 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
373 if (dev->rx_skb_pool[i]) {
374 skb = dev->rx_skb_pool[i];
375 dev->rx_skb_pool[i] = NULL;
376 return skb;
377 }
378 }
379 return NULL;
380 }
381
382 static void read_bulk_callback(struct urb *urb)
383 {
384 rtl8150_t *dev;
385 unsigned pkt_len, res;
386 struct sk_buff *skb;
387 struct net_device *netdev;
388 int status = urb->status;
389 int result;
390 unsigned long flags;
391
392 dev = urb->context;
393 if (!dev)
394 return;
395 if (test_bit(RTL8150_UNPLUG, &dev->flags))
396 return;
397 netdev = dev->netdev;
398 if (!netif_device_present(netdev))
399 return;
400
401 switch (status) {
402 case 0:
403 break;
404 case -ENOENT:
405 return; /* the urb is in unlink state */
406 case -ETIME:
407 if (printk_ratelimit())
408 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
409 goto goon;
410 default:
411 if (printk_ratelimit())
412 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
413 goto goon;
414 }
415
416 if (!dev->rx_skb)
417 goto resched;
418 /* protect against short packets (tell me why we got some?!?) */
419 if (urb->actual_length < 4)
420 goto goon;
421
422 res = urb->actual_length;
423 pkt_len = res - 4;
424
425 skb_put(dev->rx_skb, pkt_len);
426 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
427 netif_rx(dev->rx_skb);
428 netdev->stats.rx_packets++;
429 netdev->stats.rx_bytes += pkt_len;
430
431 spin_lock_irqsave(&dev->rx_pool_lock, flags);
432 skb = pull_skb(dev);
433 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
434 if (!skb)
435 goto resched;
436
437 dev->rx_skb = skb;
438 goon:
439 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
440 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
441 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
442 if (result == -ENODEV)
443 netif_device_detach(dev->netdev);
444 else if (result) {
445 set_bit(RX_URB_FAIL, &dev->flags);
446 goto resched;
447 } else {
448 clear_bit(RX_URB_FAIL, &dev->flags);
449 }
450
451 return;
452 resched:
453 tasklet_schedule(&dev->tl);
454 }
455
456 static void write_bulk_callback(struct urb *urb)
457 {
458 rtl8150_t *dev;
459 int status = urb->status;
460
461 dev = urb->context;
462 if (!dev)
463 return;
464 dev_kfree_skb_irq(dev->tx_skb);
465 if (!netif_device_present(dev->netdev))
466 return;
467 if (status)
468 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
469 dev->netdev->name, status);
470 netif_trans_update(dev->netdev);
471 netif_wake_queue(dev->netdev);
472 }
473
474 static void intr_callback(struct urb *urb)
475 {
476 rtl8150_t *dev;
477 __u8 *d;
478 int status = urb->status;
479 int res;
480
481 dev = urb->context;
482 if (!dev)
483 return;
484 switch (status) {
485 case 0: /* success */
486 break;
487 case -ECONNRESET: /* unlink */
488 case -ENOENT:
489 case -ESHUTDOWN:
490 return;
491 /* -EPIPE: should clear the halt */
492 default:
493 dev_info(&urb->dev->dev, "%s: intr status %d\n",
494 dev->netdev->name, status);
495 goto resubmit;
496 }
497
498 d = urb->transfer_buffer;
499 if (d[0] & TSR_ERRORS) {
500 dev->netdev->stats.tx_errors++;
501 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
502 dev->netdev->stats.tx_aborted_errors++;
503 if (d[INT_TSR] & TSR_LCOL)
504 dev->netdev->stats.tx_window_errors++;
505 if (d[INT_TSR] & TSR_LOSS_CRS)
506 dev->netdev->stats.tx_carrier_errors++;
507 }
508 /* Report link status changes to the network stack */
509 if ((d[INT_MSR] & MSR_LINK) == 0) {
510 if (netif_carrier_ok(dev->netdev)) {
511 netif_carrier_off(dev->netdev);
512 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
513 }
514 } else {
515 if (!netif_carrier_ok(dev->netdev)) {
516 netif_carrier_on(dev->netdev);
517 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
518 }
519 }
520
521 resubmit:
522 res = usb_submit_urb (urb, GFP_ATOMIC);
523 if (res == -ENODEV)
524 netif_device_detach(dev->netdev);
525 else if (res)
526 dev_err(&dev->udev->dev,
527 "can't resubmit intr, %s-%s/input0, status %d\n",
528 dev->udev->bus->bus_name, dev->udev->devpath, res);
529 }
530
531 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
532 {
533 rtl8150_t *dev = usb_get_intfdata(intf);
534
535 netif_device_detach(dev->netdev);
536
537 if (netif_running(dev->netdev)) {
538 usb_kill_urb(dev->rx_urb);
539 usb_kill_urb(dev->intr_urb);
540 }
541 return 0;
542 }
543
544 static int rtl8150_resume(struct usb_interface *intf)
545 {
546 rtl8150_t *dev = usb_get_intfdata(intf);
547
548 netif_device_attach(dev->netdev);
549 if (netif_running(dev->netdev)) {
550 dev->rx_urb->status = 0;
551 dev->rx_urb->actual_length = 0;
552 read_bulk_callback(dev->rx_urb);
553
554 dev->intr_urb->status = 0;
555 dev->intr_urb->actual_length = 0;
556 intr_callback(dev->intr_urb);
557 }
558 return 0;
559 }
560
561 /*
562 **
563 ** network related part of the code
564 **
565 */
566
567 static void fill_skb_pool(rtl8150_t *dev)
568 {
569 struct sk_buff *skb;
570 int i;
571
572 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
573 if (dev->rx_skb_pool[i])
574 continue;
575 skb = dev_alloc_skb(RTL8150_MTU + 2);
576 if (!skb) {
577 return;
578 }
579 skb_reserve(skb, 2);
580 dev->rx_skb_pool[i] = skb;
581 }
582 }
583
584 static void free_skb_pool(rtl8150_t *dev)
585 {
586 int i;
587
588 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
589 dev_kfree_skb(dev->rx_skb_pool[i]);
590 }
591
592 static void rx_fixup(unsigned long data)
593 {
594 struct rtl8150 *dev = (struct rtl8150 *)data;
595 struct sk_buff *skb;
596 int status;
597
598 spin_lock_irq(&dev->rx_pool_lock);
599 fill_skb_pool(dev);
600 spin_unlock_irq(&dev->rx_pool_lock);
601 if (test_bit(RX_URB_FAIL, &dev->flags))
602 if (dev->rx_skb)
603 goto try_again;
604 spin_lock_irq(&dev->rx_pool_lock);
605 skb = pull_skb(dev);
606 spin_unlock_irq(&dev->rx_pool_lock);
607 if (skb == NULL)
608 goto tlsched;
609 dev->rx_skb = skb;
610 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
611 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
612 try_again:
613 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
614 if (status == -ENODEV) {
615 netif_device_detach(dev->netdev);
616 } else if (status) {
617 set_bit(RX_URB_FAIL, &dev->flags);
618 goto tlsched;
619 } else {
620 clear_bit(RX_URB_FAIL, &dev->flags);
621 }
622
623 return;
624 tlsched:
625 tasklet_schedule(&dev->tl);
626 }
627
628 static int enable_net_traffic(rtl8150_t * dev)
629 {
630 u8 cr, tcr, rcr, msr;
631
632 if (!rtl8150_reset(dev)) {
633 dev_warn(&dev->udev->dev, "device reset failed\n");
634 }
635 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
636 rcr = 0x9e;
637 tcr = 0xd8;
638 cr = 0x0c;
639 if (!(rcr & 0x80))
640 set_bit(RTL8150_HW_CRC, &dev->flags);
641 set_registers(dev, RCR, 1, &rcr);
642 set_registers(dev, TCR, 1, &tcr);
643 set_registers(dev, CR, 1, &cr);
644 get_registers(dev, MSR, 1, &msr);
645
646 return 0;
647 }
648
649 static void disable_net_traffic(rtl8150_t * dev)
650 {
651 u8 cr;
652
653 get_registers(dev, CR, 1, &cr);
654 cr &= 0xf3;
655 set_registers(dev, CR, 1, &cr);
656 }
657
658 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
659 {
660 rtl8150_t *dev = netdev_priv(netdev);
661 dev_warn(&netdev->dev, "Tx timeout.\n");
662 usb_unlink_urb(dev->tx_urb);
663 netdev->stats.tx_errors++;
664 }
665
666 static void rtl8150_set_multicast(struct net_device *netdev)
667 {
668 rtl8150_t *dev = netdev_priv(netdev);
669 u16 rx_creg = 0x9e;
670
671 netif_stop_queue(netdev);
672 if (netdev->flags & IFF_PROMISC) {
673 rx_creg |= 0x0001;
674 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
675 } else if (!netdev_mc_empty(netdev) ||
676 (netdev->flags & IFF_ALLMULTI)) {
677 rx_creg &= 0xfffe;
678 rx_creg |= 0x0002;
679 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
680 } else {
681 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
682 rx_creg &= 0x00fc;
683 }
684 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
685 netif_wake_queue(netdev);
686 }
687
688 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
689 struct net_device *netdev)
690 {
691 rtl8150_t *dev = netdev_priv(netdev);
692 int count, res;
693
694 netif_stop_queue(netdev);
695 count = (skb->len < 60) ? 60 : skb->len;
696 count = (count & 0x3f) ? count : count + 1;
697 dev->tx_skb = skb;
698 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
699 skb->data, count, write_bulk_callback, dev);
700 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
701 /* Can we get/handle EPIPE here? */
702 if (res == -ENODEV)
703 netif_device_detach(dev->netdev);
704 else {
705 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
706 netdev->stats.tx_errors++;
707 netif_start_queue(netdev);
708 }
709 } else {
710 netdev->stats.tx_packets++;
711 netdev->stats.tx_bytes += skb->len;
712 netif_trans_update(netdev);
713 }
714
715 return NETDEV_TX_OK;
716 }
717
718
719 static void set_carrier(struct net_device *netdev)
720 {
721 rtl8150_t *dev = netdev_priv(netdev);
722 short tmp;
723
724 get_registers(dev, CSCR, 2, &tmp);
725 if (tmp & CSCR_LINK_STATUS)
726 netif_carrier_on(netdev);
727 else
728 netif_carrier_off(netdev);
729 }
730
731 static int rtl8150_open(struct net_device *netdev)
732 {
733 rtl8150_t *dev = netdev_priv(netdev);
734 int res;
735
736 if (dev->rx_skb == NULL)
737 dev->rx_skb = pull_skb(dev);
738 if (!dev->rx_skb)
739 return -ENOMEM;
740
741 set_registers(dev, IDR, 6, netdev->dev_addr);
742
743 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
744 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
745 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
746 if (res == -ENODEV)
747 netif_device_detach(dev->netdev);
748 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
749 return res;
750 }
751 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
752 dev->intr_buff, INTBUFSIZE, intr_callback,
753 dev, dev->intr_interval);
754 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
755 if (res == -ENODEV)
756 netif_device_detach(dev->netdev);
757 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
758 usb_kill_urb(dev->rx_urb);
759 return res;
760 }
761 enable_net_traffic(dev);
762 set_carrier(netdev);
763 netif_start_queue(netdev);
764
765 return res;
766 }
767
768 static int rtl8150_close(struct net_device *netdev)
769 {
770 rtl8150_t *dev = netdev_priv(netdev);
771
772 netif_stop_queue(netdev);
773 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
774 disable_net_traffic(dev);
775 unlink_all_urbs(dev);
776
777 return 0;
778 }
779
780 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
781 {
782 rtl8150_t *dev = netdev_priv(netdev);
783
784 strlcpy(info->driver, driver_name, sizeof(info->driver));
785 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
786 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
787 }
788
789 static int rtl8150_get_link_ksettings(struct net_device *netdev,
790 struct ethtool_link_ksettings *ecmd)
791 {
792 rtl8150_t *dev = netdev_priv(netdev);
793 short lpa, bmcr;
794 u32 supported;
795
796 supported = (SUPPORTED_10baseT_Half |
797 SUPPORTED_10baseT_Full |
798 SUPPORTED_100baseT_Half |
799 SUPPORTED_100baseT_Full |
800 SUPPORTED_Autoneg |
801 SUPPORTED_TP | SUPPORTED_MII);
802 ecmd->base.port = PORT_TP;
803 ecmd->base.phy_address = dev->phy;
804 get_registers(dev, BMCR, 2, &bmcr);
805 get_registers(dev, ANLP, 2, &lpa);
806 if (bmcr & BMCR_ANENABLE) {
807 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
808 SPEED_100 : SPEED_10);
809 ecmd->base.speed = speed;
810 ecmd->base.autoneg = AUTONEG_ENABLE;
811 if (speed == SPEED_100)
812 ecmd->base.duplex = (lpa & LPA_100FULL) ?
813 DUPLEX_FULL : DUPLEX_HALF;
814 else
815 ecmd->base.duplex = (lpa & LPA_10FULL) ?
816 DUPLEX_FULL : DUPLEX_HALF;
817 } else {
818 ecmd->base.autoneg = AUTONEG_DISABLE;
819 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
820 SPEED_100 : SPEED_10);
821 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
822 DUPLEX_FULL : DUPLEX_HALF;
823 }
824
825 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
826 supported);
827
828 return 0;
829 }
830
831 static const struct ethtool_ops ops = {
832 .get_drvinfo = rtl8150_get_drvinfo,
833 .get_link = ethtool_op_get_link,
834 .get_link_ksettings = rtl8150_get_link_ksettings,
835 };
836
837 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
838 {
839 rtl8150_t *dev = netdev_priv(netdev);
840 u16 *data = (u16 *) & rq->ifr_ifru;
841 int res = 0;
842
843 switch (cmd) {
844 case SIOCDEVPRIVATE:
845 data[0] = dev->phy;
846 /* fall through */
847 case SIOCDEVPRIVATE + 1:
848 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
849 break;
850 case SIOCDEVPRIVATE + 2:
851 if (!capable(CAP_NET_ADMIN))
852 return -EPERM;
853 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
854 break;
855 default:
856 res = -EOPNOTSUPP;
857 }
858
859 return res;
860 }
861
862 static const struct net_device_ops rtl8150_netdev_ops = {
863 .ndo_open = rtl8150_open,
864 .ndo_stop = rtl8150_close,
865 .ndo_do_ioctl = rtl8150_ioctl,
866 .ndo_start_xmit = rtl8150_start_xmit,
867 .ndo_tx_timeout = rtl8150_tx_timeout,
868 .ndo_set_rx_mode = rtl8150_set_multicast,
869 .ndo_set_mac_address = rtl8150_set_mac_address,
870
871 .ndo_validate_addr = eth_validate_addr,
872 };
873
874 static int rtl8150_probe(struct usb_interface *intf,
875 const struct usb_device_id *id)
876 {
877 struct usb_device *udev = interface_to_usbdev(intf);
878 rtl8150_t *dev;
879 struct net_device *netdev;
880
881 netdev = alloc_etherdev(sizeof(rtl8150_t));
882 if (!netdev)
883 return -ENOMEM;
884
885 dev = netdev_priv(netdev);
886
887 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
888 if (!dev->intr_buff) {
889 free_netdev(netdev);
890 return -ENOMEM;
891 }
892
893 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
894 spin_lock_init(&dev->rx_pool_lock);
895
896 dev->udev = udev;
897 dev->netdev = netdev;
898 netdev->netdev_ops = &rtl8150_netdev_ops;
899 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
900 netdev->ethtool_ops = &ops;
901 dev->intr_interval = 100; /* 100ms */
902
903 if (!alloc_all_urbs(dev)) {
904 dev_err(&intf->dev, "out of memory\n");
905 goto out;
906 }
907 if (!rtl8150_reset(dev)) {
908 dev_err(&intf->dev, "couldn't reset the device\n");
909 goto out1;
910 }
911 fill_skb_pool(dev);
912 set_ethernet_addr(dev);
913
914 usb_set_intfdata(intf, dev);
915 SET_NETDEV_DEV(netdev, &intf->dev);
916 if (register_netdev(netdev) != 0) {
917 dev_err(&intf->dev, "couldn't register the device\n");
918 goto out2;
919 }
920
921 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
922
923 return 0;
924
925 out2:
926 usb_set_intfdata(intf, NULL);
927 free_skb_pool(dev);
928 out1:
929 free_all_urbs(dev);
930 out:
931 kfree(dev->intr_buff);
932 free_netdev(netdev);
933 return -EIO;
934 }
935
936 static void rtl8150_disconnect(struct usb_interface *intf)
937 {
938 rtl8150_t *dev = usb_get_intfdata(intf);
939
940 usb_set_intfdata(intf, NULL);
941 if (dev) {
942 set_bit(RTL8150_UNPLUG, &dev->flags);
943 tasklet_kill(&dev->tl);
944 unregister_netdev(dev->netdev);
945 unlink_all_urbs(dev);
946 free_all_urbs(dev);
947 free_skb_pool(dev);
948 dev_kfree_skb(dev->rx_skb);
949 kfree(dev->intr_buff);
950 free_netdev(dev->netdev);
951 }
952 }
953
954 static struct usb_driver rtl8150_driver = {
955 .name = driver_name,
956 .probe = rtl8150_probe,
957 .disconnect = rtl8150_disconnect,
958 .id_table = rtl8150_table,
959 .suspend = rtl8150_suspend,
960 .resume = rtl8150_resume,
961 .disable_hub_initiated_lpm = 1,
962 };
963
964 module_usb_driver(rtl8150_driver);
965
966 MODULE_AUTHOR(DRIVER_AUTHOR);
967 MODULE_DESCRIPTION(DRIVER_DESC);
968 MODULE_LICENSE("GPL");
Linux with added FPC-III support