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[thirdparty/kernel/stable.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 /* USB endpoints */
75 enum rtl8150_usb_ep {
76 RTL8150_USB_EP_CONTROL = 0,
77 RTL8150_USB_EP_BULK_IN = 1,
78 RTL8150_USB_EP_BULK_OUT = 2,
79 RTL8150_USB_EP_INT_IN = 3,
80 };
81
82 /* Interrupt pipe data */
83 #define INT_TSR 0x00
84 #define INT_RSR 0x01
85 #define INT_MSR 0x02
86 #define INT_WAKSR 0x03
87 #define INT_TXOK_CNT 0x04
88 #define INT_RXLOST_CNT 0x05
89 #define INT_CRERR_CNT 0x06
90 #define INT_COL_CNT 0x07
91
92
93 #define RTL8150_MTU 1540
94 #define RTL8150_TX_TIMEOUT (HZ)
95 #define RX_SKB_POOL_SIZE 4
96
97 /* rtl8150 flags */
98 #define RTL8150_HW_CRC 0
99 #define RX_REG_SET 1
100 #define RTL8150_UNPLUG 2
101 #define RX_URB_FAIL 3
102
103 /* Define these values to match your device */
104 #define VENDOR_ID_REALTEK 0x0bda
105 #define VENDOR_ID_MELCO 0x0411
106 #define VENDOR_ID_MICRONET 0x3980
107 #define VENDOR_ID_LONGSHINE 0x07b8
108 #define VENDOR_ID_OQO 0x1557
109 #define VENDOR_ID_ZYXEL 0x0586
110
111 #define PRODUCT_ID_RTL8150 0x8150
112 #define PRODUCT_ID_LUAKTX 0x0012
113 #define PRODUCT_ID_LCS8138TX 0x401a
114 #define PRODUCT_ID_SP128AR 0x0003
115 #define PRODUCT_ID_PRESTIGE 0x401a
116
117 #undef EEPROM_WRITE
118
119 /* table of devices that work with this driver */
120 static const struct usb_device_id rtl8150_table[] = {
121 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
122 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
123 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
124 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
125 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
126 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
127 {}
128 };
129
130 MODULE_DEVICE_TABLE(usb, rtl8150_table);
131
132 struct rtl8150 {
133 unsigned long flags;
134 struct usb_device *udev;
135 struct tasklet_struct tl;
136 struct net_device *netdev;
137 struct urb *rx_urb, *tx_urb, *intr_urb;
138 struct sk_buff *tx_skb, *rx_skb;
139 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
140 spinlock_t rx_pool_lock;
141 struct usb_ctrlrequest dr;
142 int intr_interval;
143 u8 *intr_buff;
144 u8 phy;
145 };
146
147 typedef struct rtl8150 rtl8150_t;
148
149 struct async_req {
150 struct usb_ctrlrequest dr;
151 u16 rx_creg;
152 };
153
154 static const char driver_name [] = "rtl8150";
155
156 /*
157 **
158 ** device related part of the code
159 **
160 */
161 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
162 {
163 return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
164 RTL8150_REQT_READ, indx, 0, data, size,
165 1000, GFP_NOIO);
166 }
167
168 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
169 {
170 return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
171 RTL8150_REQT_WRITE, indx, 0, data, size,
172 1000, GFP_NOIO);
173 }
174
175 static void async_set_reg_cb(struct urb *urb)
176 {
177 struct async_req *req = (struct async_req *)urb->context;
178 int status = urb->status;
179
180 if (status < 0)
181 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
182 kfree(req);
183 usb_free_urb(urb);
184 }
185
186 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
187 {
188 int res = -ENOMEM;
189 struct urb *async_urb;
190 struct async_req *req;
191
192 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
193 if (req == NULL)
194 return res;
195 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
196 if (async_urb == NULL) {
197 kfree(req);
198 return res;
199 }
200 req->rx_creg = cpu_to_le16(reg);
201 req->dr.bRequestType = RTL8150_REQT_WRITE;
202 req->dr.bRequest = RTL8150_REQ_SET_REGS;
203 req->dr.wIndex = 0;
204 req->dr.wValue = cpu_to_le16(indx);
205 req->dr.wLength = cpu_to_le16(size);
206 usb_fill_control_urb(async_urb, dev->udev,
207 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
208 &req->rx_creg, size, async_set_reg_cb, req);
209 res = usb_submit_urb(async_urb, GFP_ATOMIC);
210 if (res) {
211 if (res == -ENODEV)
212 netif_device_detach(dev->netdev);
213 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
214 }
215 return res;
216 }
217
218 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
219 {
220 int i;
221 u8 data[3], tmp;
222
223 data[0] = phy;
224 data[1] = data[2] = 0;
225 tmp = indx | PHY_READ | PHY_GO;
226 i = 0;
227
228 set_registers(dev, PHYADD, sizeof(data), data);
229 set_registers(dev, PHYCNT, 1, &tmp);
230 do {
231 get_registers(dev, PHYCNT, 1, data);
232 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
233
234 if (i <= MII_TIMEOUT) {
235 get_registers(dev, PHYDAT, 2, data);
236 *reg = data[0] | (data[1] << 8);
237 return 0;
238 } else
239 return 1;
240 }
241
242 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
243 {
244 int i;
245 u8 data[3], tmp;
246
247 data[0] = phy;
248 data[1] = reg & 0xff;
249 data[2] = (reg >> 8) & 0xff;
250 tmp = indx | PHY_WRITE | PHY_GO;
251 i = 0;
252
253 set_registers(dev, PHYADD, sizeof(data), data);
254 set_registers(dev, PHYCNT, 1, &tmp);
255 do {
256 get_registers(dev, PHYCNT, 1, data);
257 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
258
259 if (i <= MII_TIMEOUT)
260 return 0;
261 else
262 return 1;
263 }
264
265 static void set_ethernet_addr(rtl8150_t *dev)
266 {
267 u8 node_id[ETH_ALEN];
268 int ret;
269
270 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
271
272 if (!ret) {
273 eth_hw_addr_set(dev->netdev, node_id);
274 } else {
275 eth_hw_addr_random(dev->netdev);
276 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
277 dev->netdev->dev_addr);
278 }
279 }
280
281 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
282 {
283 struct sockaddr *addr = p;
284 rtl8150_t *dev = netdev_priv(netdev);
285
286 if (netif_running(netdev))
287 return -EBUSY;
288
289 eth_hw_addr_set(netdev, addr->sa_data);
290 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
291 /* Set the IDR registers. */
292 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
293 #ifdef EEPROM_WRITE
294 {
295 int i;
296 u8 cr;
297 /* Get the CR contents. */
298 get_registers(dev, CR, 1, &cr);
299 /* Set the WEPROM bit (eeprom write enable). */
300 cr |= 0x20;
301 set_registers(dev, CR, 1, &cr);
302 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
303 so we need to split them up. */
304 for (i = 0; i * 2 < netdev->addr_len; i++) {
305 set_registers(dev, IDR_EEPROM + (i * 2), 2,
306 netdev->dev_addr + (i * 2));
307 }
308 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
309 cr &= 0xdf;
310 set_registers(dev, CR, 1, &cr);
311 }
312 #endif
313 return 0;
314 }
315
316 static int rtl8150_reset(rtl8150_t * dev)
317 {
318 u8 data = 0x10;
319 int i = HZ;
320
321 set_registers(dev, CR, 1, &data);
322 do {
323 get_registers(dev, CR, 1, &data);
324 } while ((data & 0x10) && --i);
325
326 return (i > 0) ? 1 : 0;
327 }
328
329 static int alloc_all_urbs(rtl8150_t * dev)
330 {
331 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
332 if (!dev->rx_urb)
333 return 0;
334 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
335 if (!dev->tx_urb) {
336 usb_free_urb(dev->rx_urb);
337 return 0;
338 }
339 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
340 if (!dev->intr_urb) {
341 usb_free_urb(dev->rx_urb);
342 usb_free_urb(dev->tx_urb);
343 return 0;
344 }
345
346 return 1;
347 }
348
349 static void free_all_urbs(rtl8150_t * dev)
350 {
351 usb_free_urb(dev->rx_urb);
352 usb_free_urb(dev->tx_urb);
353 usb_free_urb(dev->intr_urb);
354 }
355
356 static void unlink_all_urbs(rtl8150_t * dev)
357 {
358 usb_kill_urb(dev->rx_urb);
359 usb_kill_urb(dev->tx_urb);
360 usb_kill_urb(dev->intr_urb);
361 }
362
363 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
364 {
365 struct sk_buff *skb;
366 int i;
367
368 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
369 if (dev->rx_skb_pool[i]) {
370 skb = dev->rx_skb_pool[i];
371 dev->rx_skb_pool[i] = NULL;
372 return skb;
373 }
374 }
375 return NULL;
376 }
377
378 static void read_bulk_callback(struct urb *urb)
379 {
380 rtl8150_t *dev;
381 unsigned pkt_len, res;
382 struct sk_buff *skb;
383 struct net_device *netdev;
384 int status = urb->status;
385 int result;
386 unsigned long flags;
387
388 dev = urb->context;
389 if (!dev)
390 return;
391 if (test_bit(RTL8150_UNPLUG, &dev->flags))
392 return;
393 netdev = dev->netdev;
394 if (!netif_device_present(netdev))
395 return;
396
397 switch (status) {
398 case 0:
399 break;
400 case -ENOENT:
401 return; /* the urb is in unlink state */
402 case -ETIME:
403 if (printk_ratelimit())
404 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
405 goto goon;
406 default:
407 if (printk_ratelimit())
408 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
409 goto goon;
410 }
411
412 if (!dev->rx_skb)
413 goto resched;
414 /* protect against short packets (tell me why we got some?!?) */
415 if (urb->actual_length < 4)
416 goto goon;
417
418 res = urb->actual_length;
419 pkt_len = res - 4;
420
421 skb_put(dev->rx_skb, pkt_len);
422 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
423 netif_rx(dev->rx_skb);
424 netdev->stats.rx_packets++;
425 netdev->stats.rx_bytes += pkt_len;
426
427 spin_lock_irqsave(&dev->rx_pool_lock, flags);
428 skb = pull_skb(dev);
429 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
430 if (!skb)
431 goto resched;
432
433 dev->rx_skb = skb;
434 goon:
435 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
436 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
437 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
438 if (result == -ENODEV)
439 netif_device_detach(dev->netdev);
440 else if (result) {
441 set_bit(RX_URB_FAIL, &dev->flags);
442 goto resched;
443 } else {
444 clear_bit(RX_URB_FAIL, &dev->flags);
445 }
446
447 return;
448 resched:
449 tasklet_schedule(&dev->tl);
450 }
451
452 static void write_bulk_callback(struct urb *urb)
453 {
454 rtl8150_t *dev;
455 int status = urb->status;
456
457 dev = urb->context;
458 if (!dev)
459 return;
460 dev_kfree_skb_irq(dev->tx_skb);
461 if (!netif_device_present(dev->netdev))
462 return;
463 if (status)
464 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
465 dev->netdev->name, status);
466 netif_trans_update(dev->netdev);
467 netif_wake_queue(dev->netdev);
468 }
469
470 static void intr_callback(struct urb *urb)
471 {
472 rtl8150_t *dev;
473 __u8 *d;
474 int status = urb->status;
475 int res;
476
477 dev = urb->context;
478 if (!dev)
479 return;
480 switch (status) {
481 case 0: /* success */
482 break;
483 case -ECONNRESET: /* unlink */
484 case -ENOENT:
485 case -ESHUTDOWN:
486 return;
487 /* -EPIPE: should clear the halt */
488 default:
489 dev_info(&urb->dev->dev, "%s: intr status %d\n",
490 dev->netdev->name, status);
491 goto resubmit;
492 }
493
494 d = urb->transfer_buffer;
495 if (d[0] & TSR_ERRORS) {
496 dev->netdev->stats.tx_errors++;
497 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
498 dev->netdev->stats.tx_aborted_errors++;
499 if (d[INT_TSR] & TSR_LCOL)
500 dev->netdev->stats.tx_window_errors++;
501 if (d[INT_TSR] & TSR_LOSS_CRS)
502 dev->netdev->stats.tx_carrier_errors++;
503 }
504 /* Report link status changes to the network stack */
505 if ((d[INT_MSR] & MSR_LINK) == 0) {
506 if (netif_carrier_ok(dev->netdev)) {
507 netif_carrier_off(dev->netdev);
508 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
509 }
510 } else {
511 if (!netif_carrier_ok(dev->netdev)) {
512 netif_carrier_on(dev->netdev);
513 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
514 }
515 }
516
517 resubmit:
518 res = usb_submit_urb (urb, GFP_ATOMIC);
519 if (res == -ENODEV)
520 netif_device_detach(dev->netdev);
521 else if (res)
522 dev_err(&dev->udev->dev,
523 "can't resubmit intr, %s-%s/input0, status %d\n",
524 dev->udev->bus->bus_name, dev->udev->devpath, res);
525 }
526
527 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
528 {
529 rtl8150_t *dev = usb_get_intfdata(intf);
530
531 netif_device_detach(dev->netdev);
532
533 if (netif_running(dev->netdev)) {
534 usb_kill_urb(dev->rx_urb);
535 usb_kill_urb(dev->intr_urb);
536 }
537 return 0;
538 }
539
540 static int rtl8150_resume(struct usb_interface *intf)
541 {
542 rtl8150_t *dev = usb_get_intfdata(intf);
543
544 netif_device_attach(dev->netdev);
545 if (netif_running(dev->netdev)) {
546 dev->rx_urb->status = 0;
547 dev->rx_urb->actual_length = 0;
548 read_bulk_callback(dev->rx_urb);
549
550 dev->intr_urb->status = 0;
551 dev->intr_urb->actual_length = 0;
552 intr_callback(dev->intr_urb);
553 }
554 return 0;
555 }
556
557 /*
558 **
559 ** network related part of the code
560 **
561 */
562
563 static void fill_skb_pool(rtl8150_t *dev)
564 {
565 struct sk_buff *skb;
566 int i;
567
568 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
569 if (dev->rx_skb_pool[i])
570 continue;
571 skb = dev_alloc_skb(RTL8150_MTU + 2);
572 if (!skb) {
573 return;
574 }
575 skb_reserve(skb, 2);
576 dev->rx_skb_pool[i] = skb;
577 }
578 }
579
580 static void free_skb_pool(rtl8150_t *dev)
581 {
582 int i;
583
584 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
585 dev_kfree_skb(dev->rx_skb_pool[i]);
586 }
587
588 static void rx_fixup(struct tasklet_struct *t)
589 {
590 struct rtl8150 *dev = from_tasklet(dev, t, tl);
591 struct sk_buff *skb;
592 int status;
593
594 spin_lock_irq(&dev->rx_pool_lock);
595 fill_skb_pool(dev);
596 spin_unlock_irq(&dev->rx_pool_lock);
597 if (test_bit(RX_URB_FAIL, &dev->flags))
598 if (dev->rx_skb)
599 goto try_again;
600 spin_lock_irq(&dev->rx_pool_lock);
601 skb = pull_skb(dev);
602 spin_unlock_irq(&dev->rx_pool_lock);
603 if (skb == NULL)
604 goto tlsched;
605 dev->rx_skb = skb;
606 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
607 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
608 try_again:
609 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
610 if (status == -ENODEV) {
611 netif_device_detach(dev->netdev);
612 } else if (status) {
613 set_bit(RX_URB_FAIL, &dev->flags);
614 goto tlsched;
615 } else {
616 clear_bit(RX_URB_FAIL, &dev->flags);
617 }
618
619 return;
620 tlsched:
621 tasklet_schedule(&dev->tl);
622 }
623
624 static int enable_net_traffic(rtl8150_t * dev)
625 {
626 u8 cr, tcr, rcr, msr;
627
628 if (!rtl8150_reset(dev)) {
629 dev_warn(&dev->udev->dev, "device reset failed\n");
630 }
631 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
632 rcr = 0x9e;
633 tcr = 0xd8;
634 cr = 0x0c;
635 if (!(rcr & 0x80))
636 set_bit(RTL8150_HW_CRC, &dev->flags);
637 set_registers(dev, RCR, 1, &rcr);
638 set_registers(dev, TCR, 1, &tcr);
639 set_registers(dev, CR, 1, &cr);
640 get_registers(dev, MSR, 1, &msr);
641
642 return 0;
643 }
644
645 static void disable_net_traffic(rtl8150_t * dev)
646 {
647 u8 cr;
648
649 get_registers(dev, CR, 1, &cr);
650 cr &= 0xf3;
651 set_registers(dev, CR, 1, &cr);
652 }
653
654 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
655 {
656 rtl8150_t *dev = netdev_priv(netdev);
657 dev_warn(&netdev->dev, "Tx timeout.\n");
658 usb_unlink_urb(dev->tx_urb);
659 netdev->stats.tx_errors++;
660 }
661
662 static void rtl8150_set_multicast(struct net_device *netdev)
663 {
664 rtl8150_t *dev = netdev_priv(netdev);
665 u16 rx_creg = 0x9e;
666
667 netif_stop_queue(netdev);
668 if (netdev->flags & IFF_PROMISC) {
669 rx_creg |= 0x0001;
670 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
671 } else if (!netdev_mc_empty(netdev) ||
672 (netdev->flags & IFF_ALLMULTI)) {
673 rx_creg &= 0xfffe;
674 rx_creg |= 0x0002;
675 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
676 } else {
677 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
678 rx_creg &= 0x00fc;
679 }
680 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
681 netif_wake_queue(netdev);
682 }
683
684 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
685 struct net_device *netdev)
686 {
687 rtl8150_t *dev = netdev_priv(netdev);
688 int count, res;
689
690 netif_stop_queue(netdev);
691 count = (skb->len < 60) ? 60 : skb->len;
692 count = (count & 0x3f) ? count : count + 1;
693 dev->tx_skb = skb;
694 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
695 skb->data, count, write_bulk_callback, dev);
696 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
697 /* Can we get/handle EPIPE here? */
698 if (res == -ENODEV)
699 netif_device_detach(dev->netdev);
700 else {
701 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
702 netdev->stats.tx_errors++;
703 netif_start_queue(netdev);
704 }
705 } else {
706 netdev->stats.tx_packets++;
707 netdev->stats.tx_bytes += skb->len;
708 netif_trans_update(netdev);
709 }
710
711 return NETDEV_TX_OK;
712 }
713
714
715 static void set_carrier(struct net_device *netdev)
716 {
717 rtl8150_t *dev = netdev_priv(netdev);
718 short tmp;
719
720 get_registers(dev, CSCR, 2, &tmp);
721 if (tmp & CSCR_LINK_STATUS)
722 netif_carrier_on(netdev);
723 else
724 netif_carrier_off(netdev);
725 }
726
727 static int rtl8150_open(struct net_device *netdev)
728 {
729 rtl8150_t *dev = netdev_priv(netdev);
730 int res;
731
732 if (dev->rx_skb == NULL)
733 dev->rx_skb = pull_skb(dev);
734 if (!dev->rx_skb)
735 return -ENOMEM;
736
737 set_registers(dev, IDR, 6, netdev->dev_addr);
738
739 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
740 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
741 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
742 if (res == -ENODEV)
743 netif_device_detach(dev->netdev);
744 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
745 return res;
746 }
747 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
748 dev->intr_buff, INTBUFSIZE, intr_callback,
749 dev, dev->intr_interval);
750 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
751 if (res == -ENODEV)
752 netif_device_detach(dev->netdev);
753 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
754 usb_kill_urb(dev->rx_urb);
755 return res;
756 }
757 enable_net_traffic(dev);
758 set_carrier(netdev);
759 netif_start_queue(netdev);
760
761 return res;
762 }
763
764 static int rtl8150_close(struct net_device *netdev)
765 {
766 rtl8150_t *dev = netdev_priv(netdev);
767
768 netif_stop_queue(netdev);
769 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
770 disable_net_traffic(dev);
771 unlink_all_urbs(dev);
772
773 return 0;
774 }
775
776 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
777 {
778 rtl8150_t *dev = netdev_priv(netdev);
779
780 strscpy(info->driver, driver_name, sizeof(info->driver));
781 strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
782 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
783 }
784
785 static int rtl8150_get_link_ksettings(struct net_device *netdev,
786 struct ethtool_link_ksettings *ecmd)
787 {
788 rtl8150_t *dev = netdev_priv(netdev);
789 short lpa = 0;
790 short bmcr = 0;
791 u32 supported;
792
793 supported = (SUPPORTED_10baseT_Half |
794 SUPPORTED_10baseT_Full |
795 SUPPORTED_100baseT_Half |
796 SUPPORTED_100baseT_Full |
797 SUPPORTED_Autoneg |
798 SUPPORTED_TP | SUPPORTED_MII);
799 ecmd->base.port = PORT_TP;
800 ecmd->base.phy_address = dev->phy;
801 get_registers(dev, BMCR, 2, &bmcr);
802 get_registers(dev, ANLP, 2, &lpa);
803 if (bmcr & BMCR_ANENABLE) {
804 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
805 SPEED_100 : SPEED_10);
806 ecmd->base.speed = speed;
807 ecmd->base.autoneg = AUTONEG_ENABLE;
808 if (speed == SPEED_100)
809 ecmd->base.duplex = (lpa & LPA_100FULL) ?
810 DUPLEX_FULL : DUPLEX_HALF;
811 else
812 ecmd->base.duplex = (lpa & LPA_10FULL) ?
813 DUPLEX_FULL : DUPLEX_HALF;
814 } else {
815 ecmd->base.autoneg = AUTONEG_DISABLE;
816 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
817 SPEED_100 : SPEED_10);
818 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
819 DUPLEX_FULL : DUPLEX_HALF;
820 }
821
822 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
823 supported);
824
825 return 0;
826 }
827
828 static const struct ethtool_ops ops = {
829 .get_drvinfo = rtl8150_get_drvinfo,
830 .get_link = ethtool_op_get_link,
831 .get_link_ksettings = rtl8150_get_link_ksettings,
832 };
833
834 static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
835 void __user *udata, int cmd)
836 {
837 rtl8150_t *dev = netdev_priv(netdev);
838 u16 *data = (u16 *) & rq->ifr_ifru;
839 int res = 0;
840
841 switch (cmd) {
842 case SIOCDEVPRIVATE:
843 data[0] = dev->phy;
844 fallthrough;
845 case SIOCDEVPRIVATE + 1:
846 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
847 break;
848 case SIOCDEVPRIVATE + 2:
849 if (!capable(CAP_NET_ADMIN))
850 return -EPERM;
851 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
852 break;
853 default:
854 res = -EOPNOTSUPP;
855 }
856
857 return res;
858 }
859
860 static const struct net_device_ops rtl8150_netdev_ops = {
861 .ndo_open = rtl8150_open,
862 .ndo_stop = rtl8150_close,
863 .ndo_siocdevprivate = rtl8150_siocdevprivate,
864 .ndo_start_xmit = rtl8150_start_xmit,
865 .ndo_tx_timeout = rtl8150_tx_timeout,
866 .ndo_set_rx_mode = rtl8150_set_multicast,
867 .ndo_set_mac_address = rtl8150_set_mac_address,
868
869 .ndo_validate_addr = eth_validate_addr,
870 };
871
872 static int rtl8150_probe(struct usb_interface *intf,
873 const struct usb_device_id *id)
874 {
875 struct usb_device *udev = interface_to_usbdev(intf);
876 rtl8150_t *dev;
877 struct net_device *netdev;
878 static const u8 bulk_ep_addr[] = {
879 RTL8150_USB_EP_BULK_IN | USB_DIR_IN,
880 RTL8150_USB_EP_BULK_OUT | USB_DIR_OUT,
881 0};
882 static const u8 int_ep_addr[] = {
883 RTL8150_USB_EP_INT_IN | USB_DIR_IN,
884 0};
885
886 netdev = alloc_etherdev(sizeof(rtl8150_t));
887 if (!netdev)
888 return -ENOMEM;
889
890 dev = netdev_priv(netdev);
891
892 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
893 if (!dev->intr_buff) {
894 free_netdev(netdev);
895 return -ENOMEM;
896 }
897
898 /* Verify that all required endpoints are present */
899 if (!usb_check_bulk_endpoints(intf, bulk_ep_addr) ||
900 !usb_check_int_endpoints(intf, int_ep_addr)) {
901 dev_err(&intf->dev, "couldn't find required endpoints\n");
902 goto out;
903 }
904
905 tasklet_setup(&dev->tl, rx_fixup);
906 spin_lock_init(&dev->rx_pool_lock);
907
908 dev->udev = udev;
909 dev->netdev = netdev;
910 netdev->netdev_ops = &rtl8150_netdev_ops;
911 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
912 netdev->ethtool_ops = &ops;
913 dev->intr_interval = 100; /* 100ms */
914
915 if (!alloc_all_urbs(dev)) {
916 dev_err(&intf->dev, "out of memory\n");
917 goto out;
918 }
919 if (!rtl8150_reset(dev)) {
920 dev_err(&intf->dev, "couldn't reset the device\n");
921 goto out1;
922 }
923 fill_skb_pool(dev);
924 set_ethernet_addr(dev);
925
926 usb_set_intfdata(intf, dev);
927 SET_NETDEV_DEV(netdev, &intf->dev);
928 if (register_netdev(netdev) != 0) {
929 dev_err(&intf->dev, "couldn't register the device\n");
930 goto out2;
931 }
932
933 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
934
935 return 0;
936
937 out2:
938 usb_set_intfdata(intf, NULL);
939 free_skb_pool(dev);
940 out1:
941 free_all_urbs(dev);
942 out:
943 kfree(dev->intr_buff);
944 free_netdev(netdev);
945 return -EIO;
946 }
947
948 static void rtl8150_disconnect(struct usb_interface *intf)
949 {
950 rtl8150_t *dev = usb_get_intfdata(intf);
951
952 usb_set_intfdata(intf, NULL);
953 if (dev) {
954 set_bit(RTL8150_UNPLUG, &dev->flags);
955 tasklet_kill(&dev->tl);
956 unregister_netdev(dev->netdev);
957 unlink_all_urbs(dev);
958 free_all_urbs(dev);
959 free_skb_pool(dev);
960 dev_kfree_skb(dev->rx_skb);
961 kfree(dev->intr_buff);
962 free_netdev(dev->netdev);
963 }
964 }
965
966 static struct usb_driver rtl8150_driver = {
967 .name = driver_name,
968 .probe = rtl8150_probe,
969 .disconnect = rtl8150_disconnect,
970 .id_table = rtl8150_table,
971 .suspend = rtl8150_suspend,
972 .resume = rtl8150_resume,
973 .disable_hub_initiated_lpm = 1,
974 };
975
976 module_usb_driver(rtl8150_driver);
977
978 MODULE_AUTHOR(DRIVER_AUTHOR);
979 MODULE_DESCRIPTION(DRIVER_DESC);
980 MODULE_LICENSE("GPL");
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git