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Merge branch 'akpm' (patches from Andrew)
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / usb / rtl8150.c
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 return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
156 RTL8150_REQT_READ, indx, 0, data, size,
157 1000, GFP_NOIO);
158 }
159
160 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
161 {
162 return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
163 RTL8150_REQT_WRITE, indx, 0, data, size,
164 1000, GFP_NOIO);
165 }
166
167 static void async_set_reg_cb(struct urb *urb)
168 {
169 struct async_req *req = (struct async_req *)urb->context;
170 int status = urb->status;
171
172 if (status < 0)
173 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
174 kfree(req);
175 usb_free_urb(urb);
176 }
177
178 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
179 {
180 int res = -ENOMEM;
181 struct urb *async_urb;
182 struct async_req *req;
183
184 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
185 if (req == NULL)
186 return res;
187 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
188 if (async_urb == NULL) {
189 kfree(req);
190 return res;
191 }
192 req->rx_creg = cpu_to_le16(reg);
193 req->dr.bRequestType = RTL8150_REQT_WRITE;
194 req->dr.bRequest = RTL8150_REQ_SET_REGS;
195 req->dr.wIndex = 0;
196 req->dr.wValue = cpu_to_le16(indx);
197 req->dr.wLength = cpu_to_le16(size);
198 usb_fill_control_urb(async_urb, dev->udev,
199 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
200 &req->rx_creg, size, async_set_reg_cb, req);
201 res = usb_submit_urb(async_urb, GFP_ATOMIC);
202 if (res) {
203 if (res == -ENODEV)
204 netif_device_detach(dev->netdev);
205 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
206 }
207 return res;
208 }
209
210 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
211 {
212 int i;
213 u8 data[3], tmp;
214
215 data[0] = phy;
216 data[1] = data[2] = 0;
217 tmp = indx | PHY_READ | PHY_GO;
218 i = 0;
219
220 set_registers(dev, PHYADD, sizeof(data), data);
221 set_registers(dev, PHYCNT, 1, &tmp);
222 do {
223 get_registers(dev, PHYCNT, 1, data);
224 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
225
226 if (i <= MII_TIMEOUT) {
227 get_registers(dev, PHYDAT, 2, data);
228 *reg = data[0] | (data[1] << 8);
229 return 0;
230 } else
231 return 1;
232 }
233
234 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
235 {
236 int i;
237 u8 data[3], tmp;
238
239 data[0] = phy;
240 data[1] = reg & 0xff;
241 data[2] = (reg >> 8) & 0xff;
242 tmp = indx | PHY_WRITE | PHY_GO;
243 i = 0;
244
245 set_registers(dev, PHYADD, sizeof(data), data);
246 set_registers(dev, PHYCNT, 1, &tmp);
247 do {
248 get_registers(dev, PHYCNT, 1, data);
249 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
250
251 if (i <= MII_TIMEOUT)
252 return 0;
253 else
254 return 1;
255 }
256
257 static void set_ethernet_addr(rtl8150_t *dev)
258 {
259 u8 node_id[ETH_ALEN];
260 int ret;
261
262 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
263
264 if (ret == sizeof(node_id)) {
265 ether_addr_copy(dev->netdev->dev_addr, node_id);
266 } else {
267 eth_hw_addr_random(dev->netdev);
268 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
269 dev->netdev->dev_addr);
270 }
271 }
272
273 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
274 {
275 struct sockaddr *addr = p;
276 rtl8150_t *dev = netdev_priv(netdev);
277
278 if (netif_running(netdev))
279 return -EBUSY;
280
281 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
282 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
283 /* Set the IDR registers. */
284 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
285 #ifdef EEPROM_WRITE
286 {
287 int i;
288 u8 cr;
289 /* Get the CR contents. */
290 get_registers(dev, CR, 1, &cr);
291 /* Set the WEPROM bit (eeprom write enable). */
292 cr |= 0x20;
293 set_registers(dev, CR, 1, &cr);
294 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
295 so we need to split them up. */
296 for (i = 0; i * 2 < netdev->addr_len; i++) {
297 set_registers(dev, IDR_EEPROM + (i * 2), 2,
298 netdev->dev_addr + (i * 2));
299 }
300 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
301 cr &= 0xdf;
302 set_registers(dev, CR, 1, &cr);
303 }
304 #endif
305 return 0;
306 }
307
308 static int rtl8150_reset(rtl8150_t * dev)
309 {
310 u8 data = 0x10;
311 int i = HZ;
312
313 set_registers(dev, CR, 1, &data);
314 do {
315 get_registers(dev, CR, 1, &data);
316 } while ((data & 0x10) && --i);
317
318 return (i > 0) ? 1 : 0;
319 }
320
321 static int alloc_all_urbs(rtl8150_t * dev)
322 {
323 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
324 if (!dev->rx_urb)
325 return 0;
326 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
327 if (!dev->tx_urb) {
328 usb_free_urb(dev->rx_urb);
329 return 0;
330 }
331 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
332 if (!dev->intr_urb) {
333 usb_free_urb(dev->rx_urb);
334 usb_free_urb(dev->tx_urb);
335 return 0;
336 }
337
338 return 1;
339 }
340
341 static void free_all_urbs(rtl8150_t * dev)
342 {
343 usb_free_urb(dev->rx_urb);
344 usb_free_urb(dev->tx_urb);
345 usb_free_urb(dev->intr_urb);
346 }
347
348 static void unlink_all_urbs(rtl8150_t * dev)
349 {
350 usb_kill_urb(dev->rx_urb);
351 usb_kill_urb(dev->tx_urb);
352 usb_kill_urb(dev->intr_urb);
353 }
354
355 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
356 {
357 struct sk_buff *skb;
358 int i;
359
360 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
361 if (dev->rx_skb_pool[i]) {
362 skb = dev->rx_skb_pool[i];
363 dev->rx_skb_pool[i] = NULL;
364 return skb;
365 }
366 }
367 return NULL;
368 }
369
370 static void read_bulk_callback(struct urb *urb)
371 {
372 rtl8150_t *dev;
373 unsigned pkt_len, res;
374 struct sk_buff *skb;
375 struct net_device *netdev;
376 int status = urb->status;
377 int result;
378 unsigned long flags;
379
380 dev = urb->context;
381 if (!dev)
382 return;
383 if (test_bit(RTL8150_UNPLUG, &dev->flags))
384 return;
385 netdev = dev->netdev;
386 if (!netif_device_present(netdev))
387 return;
388
389 switch (status) {
390 case 0:
391 break;
392 case -ENOENT:
393 return; /* the urb is in unlink state */
394 case -ETIME:
395 if (printk_ratelimit())
396 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
397 goto goon;
398 default:
399 if (printk_ratelimit())
400 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
401 goto goon;
402 }
403
404 if (!dev->rx_skb)
405 goto resched;
406 /* protect against short packets (tell me why we got some?!?) */
407 if (urb->actual_length < 4)
408 goto goon;
409
410 res = urb->actual_length;
411 pkt_len = res - 4;
412
413 skb_put(dev->rx_skb, pkt_len);
414 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
415 netif_rx(dev->rx_skb);
416 netdev->stats.rx_packets++;
417 netdev->stats.rx_bytes += pkt_len;
418
419 spin_lock_irqsave(&dev->rx_pool_lock, flags);
420 skb = pull_skb(dev);
421 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
422 if (!skb)
423 goto resched;
424
425 dev->rx_skb = skb;
426 goon:
427 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
428 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
429 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
430 if (result == -ENODEV)
431 netif_device_detach(dev->netdev);
432 else if (result) {
433 set_bit(RX_URB_FAIL, &dev->flags);
434 goto resched;
435 } else {
436 clear_bit(RX_URB_FAIL, &dev->flags);
437 }
438
439 return;
440 resched:
441 tasklet_schedule(&dev->tl);
442 }
443
444 static void write_bulk_callback(struct urb *urb)
445 {
446 rtl8150_t *dev;
447 int status = urb->status;
448
449 dev = urb->context;
450 if (!dev)
451 return;
452 dev_kfree_skb_irq(dev->tx_skb);
453 if (!netif_device_present(dev->netdev))
454 return;
455 if (status)
456 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
457 dev->netdev->name, status);
458 netif_trans_update(dev->netdev);
459 netif_wake_queue(dev->netdev);
460 }
461
462 static void intr_callback(struct urb *urb)
463 {
464 rtl8150_t *dev;
465 __u8 *d;
466 int status = urb->status;
467 int res;
468
469 dev = urb->context;
470 if (!dev)
471 return;
472 switch (status) {
473 case 0: /* success */
474 break;
475 case -ECONNRESET: /* unlink */
476 case -ENOENT:
477 case -ESHUTDOWN:
478 return;
479 /* -EPIPE: should clear the halt */
480 default:
481 dev_info(&urb->dev->dev, "%s: intr status %d\n",
482 dev->netdev->name, status);
483 goto resubmit;
484 }
485
486 d = urb->transfer_buffer;
487 if (d[0] & TSR_ERRORS) {
488 dev->netdev->stats.tx_errors++;
489 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
490 dev->netdev->stats.tx_aborted_errors++;
491 if (d[INT_TSR] & TSR_LCOL)
492 dev->netdev->stats.tx_window_errors++;
493 if (d[INT_TSR] & TSR_LOSS_CRS)
494 dev->netdev->stats.tx_carrier_errors++;
495 }
496 /* Report link status changes to the network stack */
497 if ((d[INT_MSR] & MSR_LINK) == 0) {
498 if (netif_carrier_ok(dev->netdev)) {
499 netif_carrier_off(dev->netdev);
500 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
501 }
502 } else {
503 if (!netif_carrier_ok(dev->netdev)) {
504 netif_carrier_on(dev->netdev);
505 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
506 }
507 }
508
509 resubmit:
510 res = usb_submit_urb (urb, GFP_ATOMIC);
511 if (res == -ENODEV)
512 netif_device_detach(dev->netdev);
513 else if (res)
514 dev_err(&dev->udev->dev,
515 "can't resubmit intr, %s-%s/input0, status %d\n",
516 dev->udev->bus->bus_name, dev->udev->devpath, res);
517 }
518
519 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
520 {
521 rtl8150_t *dev = usb_get_intfdata(intf);
522
523 netif_device_detach(dev->netdev);
524
525 if (netif_running(dev->netdev)) {
526 usb_kill_urb(dev->rx_urb);
527 usb_kill_urb(dev->intr_urb);
528 }
529 return 0;
530 }
531
532 static int rtl8150_resume(struct usb_interface *intf)
533 {
534 rtl8150_t *dev = usb_get_intfdata(intf);
535
536 netif_device_attach(dev->netdev);
537 if (netif_running(dev->netdev)) {
538 dev->rx_urb->status = 0;
539 dev->rx_urb->actual_length = 0;
540 read_bulk_callback(dev->rx_urb);
541
542 dev->intr_urb->status = 0;
543 dev->intr_urb->actual_length = 0;
544 intr_callback(dev->intr_urb);
545 }
546 return 0;
547 }
548
549 /*
550 **
551 ** network related part of the code
552 **
553 */
554
555 static void fill_skb_pool(rtl8150_t *dev)
556 {
557 struct sk_buff *skb;
558 int i;
559
560 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
561 if (dev->rx_skb_pool[i])
562 continue;
563 skb = dev_alloc_skb(RTL8150_MTU + 2);
564 if (!skb) {
565 return;
566 }
567 skb_reserve(skb, 2);
568 dev->rx_skb_pool[i] = skb;
569 }
570 }
571
572 static void free_skb_pool(rtl8150_t *dev)
573 {
574 int i;
575
576 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
577 dev_kfree_skb(dev->rx_skb_pool[i]);
578 }
579
580 static void rx_fixup(unsigned long data)
581 {
582 struct rtl8150 *dev = (struct rtl8150 *)data;
583 struct sk_buff *skb;
584 int status;
585
586 spin_lock_irq(&dev->rx_pool_lock);
587 fill_skb_pool(dev);
588 spin_unlock_irq(&dev->rx_pool_lock);
589 if (test_bit(RX_URB_FAIL, &dev->flags))
590 if (dev->rx_skb)
591 goto try_again;
592 spin_lock_irq(&dev->rx_pool_lock);
593 skb = pull_skb(dev);
594 spin_unlock_irq(&dev->rx_pool_lock);
595 if (skb == NULL)
596 goto tlsched;
597 dev->rx_skb = skb;
598 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
599 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
600 try_again:
601 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
602 if (status == -ENODEV) {
603 netif_device_detach(dev->netdev);
604 } else if (status) {
605 set_bit(RX_URB_FAIL, &dev->flags);
606 goto tlsched;
607 } else {
608 clear_bit(RX_URB_FAIL, &dev->flags);
609 }
610
611 return;
612 tlsched:
613 tasklet_schedule(&dev->tl);
614 }
615
616 static int enable_net_traffic(rtl8150_t * dev)
617 {
618 u8 cr, tcr, rcr, msr;
619
620 if (!rtl8150_reset(dev)) {
621 dev_warn(&dev->udev->dev, "device reset failed\n");
622 }
623 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
624 rcr = 0x9e;
625 tcr = 0xd8;
626 cr = 0x0c;
627 if (!(rcr & 0x80))
628 set_bit(RTL8150_HW_CRC, &dev->flags);
629 set_registers(dev, RCR, 1, &rcr);
630 set_registers(dev, TCR, 1, &tcr);
631 set_registers(dev, CR, 1, &cr);
632 get_registers(dev, MSR, 1, &msr);
633
634 return 0;
635 }
636
637 static void disable_net_traffic(rtl8150_t * dev)
638 {
639 u8 cr;
640
641 get_registers(dev, CR, 1, &cr);
642 cr &= 0xf3;
643 set_registers(dev, CR, 1, &cr);
644 }
645
646 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
647 {
648 rtl8150_t *dev = netdev_priv(netdev);
649 dev_warn(&netdev->dev, "Tx timeout.\n");
650 usb_unlink_urb(dev->tx_urb);
651 netdev->stats.tx_errors++;
652 }
653
654 static void rtl8150_set_multicast(struct net_device *netdev)
655 {
656 rtl8150_t *dev = netdev_priv(netdev);
657 u16 rx_creg = 0x9e;
658
659 netif_stop_queue(netdev);
660 if (netdev->flags & IFF_PROMISC) {
661 rx_creg |= 0x0001;
662 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
663 } else if (!netdev_mc_empty(netdev) ||
664 (netdev->flags & IFF_ALLMULTI)) {
665 rx_creg &= 0xfffe;
666 rx_creg |= 0x0002;
667 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
668 } else {
669 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
670 rx_creg &= 0x00fc;
671 }
672 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
673 netif_wake_queue(netdev);
674 }
675
676 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
677 struct net_device *netdev)
678 {
679 rtl8150_t *dev = netdev_priv(netdev);
680 int count, res;
681
682 netif_stop_queue(netdev);
683 count = (skb->len < 60) ? 60 : skb->len;
684 count = (count & 0x3f) ? count : count + 1;
685 dev->tx_skb = skb;
686 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
687 skb->data, count, write_bulk_callback, dev);
688 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
689 /* Can we get/handle EPIPE here? */
690 if (res == -ENODEV)
691 netif_device_detach(dev->netdev);
692 else {
693 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
694 netdev->stats.tx_errors++;
695 netif_start_queue(netdev);
696 }
697 } else {
698 netdev->stats.tx_packets++;
699 netdev->stats.tx_bytes += skb->len;
700 netif_trans_update(netdev);
701 }
702
703 return NETDEV_TX_OK;
704 }
705
706
707 static void set_carrier(struct net_device *netdev)
708 {
709 rtl8150_t *dev = netdev_priv(netdev);
710 short tmp;
711
712 get_registers(dev, CSCR, 2, &tmp);
713 if (tmp & CSCR_LINK_STATUS)
714 netif_carrier_on(netdev);
715 else
716 netif_carrier_off(netdev);
717 }
718
719 static int rtl8150_open(struct net_device *netdev)
720 {
721 rtl8150_t *dev = netdev_priv(netdev);
722 int res;
723
724 if (dev->rx_skb == NULL)
725 dev->rx_skb = pull_skb(dev);
726 if (!dev->rx_skb)
727 return -ENOMEM;
728
729 set_registers(dev, IDR, 6, netdev->dev_addr);
730
731 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
732 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
733 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
734 if (res == -ENODEV)
735 netif_device_detach(dev->netdev);
736 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
737 return res;
738 }
739 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
740 dev->intr_buff, INTBUFSIZE, intr_callback,
741 dev, dev->intr_interval);
742 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
743 if (res == -ENODEV)
744 netif_device_detach(dev->netdev);
745 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
746 usb_kill_urb(dev->rx_urb);
747 return res;
748 }
749 enable_net_traffic(dev);
750 set_carrier(netdev);
751 netif_start_queue(netdev);
752
753 return res;
754 }
755
756 static int rtl8150_close(struct net_device *netdev)
757 {
758 rtl8150_t *dev = netdev_priv(netdev);
759
760 netif_stop_queue(netdev);
761 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
762 disable_net_traffic(dev);
763 unlink_all_urbs(dev);
764
765 return 0;
766 }
767
768 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
769 {
770 rtl8150_t *dev = netdev_priv(netdev);
771
772 strlcpy(info->driver, driver_name, sizeof(info->driver));
773 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
774 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
775 }
776
777 static int rtl8150_get_link_ksettings(struct net_device *netdev,
778 struct ethtool_link_ksettings *ecmd)
779 {
780 rtl8150_t *dev = netdev_priv(netdev);
781 short lpa, bmcr;
782 u32 supported;
783
784 supported = (SUPPORTED_10baseT_Half |
785 SUPPORTED_10baseT_Full |
786 SUPPORTED_100baseT_Half |
787 SUPPORTED_100baseT_Full |
788 SUPPORTED_Autoneg |
789 SUPPORTED_TP | SUPPORTED_MII);
790 ecmd->base.port = PORT_TP;
791 ecmd->base.phy_address = dev->phy;
792 get_registers(dev, BMCR, 2, &bmcr);
793 get_registers(dev, ANLP, 2, &lpa);
794 if (bmcr & BMCR_ANENABLE) {
795 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
796 SPEED_100 : SPEED_10);
797 ecmd->base.speed = speed;
798 ecmd->base.autoneg = AUTONEG_ENABLE;
799 if (speed == SPEED_100)
800 ecmd->base.duplex = (lpa & LPA_100FULL) ?
801 DUPLEX_FULL : DUPLEX_HALF;
802 else
803 ecmd->base.duplex = (lpa & LPA_10FULL) ?
804 DUPLEX_FULL : DUPLEX_HALF;
805 } else {
806 ecmd->base.autoneg = AUTONEG_DISABLE;
807 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
808 SPEED_100 : SPEED_10);
809 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
810 DUPLEX_FULL : DUPLEX_HALF;
811 }
812
813 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
814 supported);
815
816 return 0;
817 }
818
819 static const struct ethtool_ops ops = {
820 .get_drvinfo = rtl8150_get_drvinfo,
821 .get_link = ethtool_op_get_link,
822 .get_link_ksettings = rtl8150_get_link_ksettings,
823 };
824
825 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
826 {
827 rtl8150_t *dev = netdev_priv(netdev);
828 u16 *data = (u16 *) & rq->ifr_ifru;
829 int res = 0;
830
831 switch (cmd) {
832 case SIOCDEVPRIVATE:
833 data[0] = dev->phy;
834 fallthrough;
835 case SIOCDEVPRIVATE + 1:
836 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
837 break;
838 case SIOCDEVPRIVATE + 2:
839 if (!capable(CAP_NET_ADMIN))
840 return -EPERM;
841 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
842 break;
843 default:
844 res = -EOPNOTSUPP;
845 }
846
847 return res;
848 }
849
850 static const struct net_device_ops rtl8150_netdev_ops = {
851 .ndo_open = rtl8150_open,
852 .ndo_stop = rtl8150_close,
853 .ndo_do_ioctl = rtl8150_ioctl,
854 .ndo_start_xmit = rtl8150_start_xmit,
855 .ndo_tx_timeout = rtl8150_tx_timeout,
856 .ndo_set_rx_mode = rtl8150_set_multicast,
857 .ndo_set_mac_address = rtl8150_set_mac_address,
858
859 .ndo_validate_addr = eth_validate_addr,
860 };
861
862 static int rtl8150_probe(struct usb_interface *intf,
863 const struct usb_device_id *id)
864 {
865 struct usb_device *udev = interface_to_usbdev(intf);
866 rtl8150_t *dev;
867 struct net_device *netdev;
868
869 netdev = alloc_etherdev(sizeof(rtl8150_t));
870 if (!netdev)
871 return -ENOMEM;
872
873 dev = netdev_priv(netdev);
874
875 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
876 if (!dev->intr_buff) {
877 free_netdev(netdev);
878 return -ENOMEM;
879 }
880
881 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
882 spin_lock_init(&dev->rx_pool_lock);
883
884 dev->udev = udev;
885 dev->netdev = netdev;
886 netdev->netdev_ops = &rtl8150_netdev_ops;
887 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
888 netdev->ethtool_ops = &ops;
889 dev->intr_interval = 100; /* 100ms */
890
891 if (!alloc_all_urbs(dev)) {
892 dev_err(&intf->dev, "out of memory\n");
893 goto out;
894 }
895 if (!rtl8150_reset(dev)) {
896 dev_err(&intf->dev, "couldn't reset the device\n");
897 goto out1;
898 }
899 fill_skb_pool(dev);
900 set_ethernet_addr(dev);
901
902 usb_set_intfdata(intf, dev);
903 SET_NETDEV_DEV(netdev, &intf->dev);
904 if (register_netdev(netdev) != 0) {
905 dev_err(&intf->dev, "couldn't register the device\n");
906 goto out2;
907 }
908
909 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
910
911 return 0;
912
913 out2:
914 usb_set_intfdata(intf, NULL);
915 free_skb_pool(dev);
916 out1:
917 free_all_urbs(dev);
918 out:
919 kfree(dev->intr_buff);
920 free_netdev(netdev);
921 return -EIO;
922 }
923
924 static void rtl8150_disconnect(struct usb_interface *intf)
925 {
926 rtl8150_t *dev = usb_get_intfdata(intf);
927
928 usb_set_intfdata(intf, NULL);
929 if (dev) {
930 set_bit(RTL8150_UNPLUG, &dev->flags);
931 tasklet_kill(&dev->tl);
932 unregister_netdev(dev->netdev);
933 unlink_all_urbs(dev);
934 free_all_urbs(dev);
935 free_skb_pool(dev);
936 dev_kfree_skb(dev->rx_skb);
937 kfree(dev->intr_buff);
938 free_netdev(dev->netdev);
939 }
940 }
941
942 static struct usb_driver rtl8150_driver = {
943 .name = driver_name,
944 .probe = rtl8150_probe,
945 .disconnect = rtl8150_disconnect,
946 .id_table = rtl8150_table,
947 .suspend = rtl8150_suspend,
948 .resume = rtl8150_resume,
949 .disable_hub_initiated_lpm = 1,
950 };
951
952 module_usb_driver(rtl8150_driver);
953
954 MODULE_AUTHOR(DRIVER_AUTHOR);
955 MODULE_DESCRIPTION(DRIVER_DESC);
956 MODULE_LICENSE("GPL");
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