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Merge tag 'for-linus-20160801' of git://git.infradead.org/linux-mtd
[deliverable/linux.git] / drivers / net / usb / rtl8150.c
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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 <asm/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 */
115static 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
125MODULE_DEVICE_TABLE(usb, rtl8150_table);
126
127struct 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
142typedef struct rtl8150 rtl8150_t;
143
144struct async_req {
145 struct usb_ctrlrequest dr;
146 u16 rx_creg;
147};
148
149static const char driver_name [] = "rtl8150";
150
151/*
152**
153** device related part of the code
154**
155*/
156static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
157{
158 return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
159 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
160 indx, 0, data, size, 500);
161}
162
163static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
164{
165 return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
166 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
167 indx, 0, data, size, 500);
168}
169
170static void async_set_reg_cb(struct urb *urb)
171{
172 struct async_req *req = (struct async_req *)urb->context;
173 int status = urb->status;
174
175 if (status < 0)
176 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
177 kfree(req);
178 usb_free_urb(urb);
179}
180
181static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
182{
183 int res = -ENOMEM;
184 struct urb *async_urb;
185 struct async_req *req;
186
187 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
188 if (req == NULL)
189 return res;
190 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
191 if (async_urb == NULL) {
192 kfree(req);
193 return res;
194 }
195 req->rx_creg = cpu_to_le16(reg);
196 req->dr.bRequestType = RTL8150_REQT_WRITE;
197 req->dr.bRequest = RTL8150_REQ_SET_REGS;
198 req->dr.wIndex = 0;
199 req->dr.wValue = cpu_to_le16(indx);
200 req->dr.wLength = cpu_to_le16(size);
201 usb_fill_control_urb(async_urb, dev->udev,
202 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
203 &req->rx_creg, size, async_set_reg_cb, req);
204 res = usb_submit_urb(async_urb, GFP_ATOMIC);
205 if (res) {
206 if (res == -ENODEV)
207 netif_device_detach(dev->netdev);
208 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
209 }
210 return res;
211}
212
213static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
214{
215 int i;
216 u8 data[3], tmp;
217
218 data[0] = phy;
219 data[1] = data[2] = 0;
220 tmp = indx | PHY_READ | PHY_GO;
221 i = 0;
222
223 set_registers(dev, PHYADD, sizeof(data), data);
224 set_registers(dev, PHYCNT, 1, &tmp);
225 do {
226 get_registers(dev, PHYCNT, 1, data);
227 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
228
229 if (i <= MII_TIMEOUT) {
230 get_registers(dev, PHYDAT, 2, data);
231 *reg = data[0] | (data[1] << 8);
232 return 0;
233 } else
234 return 1;
235}
236
237static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
238{
239 int i;
240 u8 data[3], tmp;
241
242 data[0] = phy;
243 data[1] = reg & 0xff;
244 data[2] = (reg >> 8) & 0xff;
245 tmp = indx | PHY_WRITE | PHY_GO;
246 i = 0;
247
248 set_registers(dev, PHYADD, sizeof(data), data);
249 set_registers(dev, PHYCNT, 1, &tmp);
250 do {
251 get_registers(dev, PHYCNT, 1, data);
252 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
253
254 if (i <= MII_TIMEOUT)
255 return 0;
256 else
257 return 1;
258}
259
260static inline void set_ethernet_addr(rtl8150_t * dev)
261{
262 u8 node_id[6];
263
264 get_registers(dev, IDR, sizeof(node_id), node_id);
265 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
266}
267
268static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
269{
270 struct sockaddr *addr = p;
271 rtl8150_t *dev = netdev_priv(netdev);
272
273 if (netif_running(netdev))
274 return -EBUSY;
275
276 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
277 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
278 /* Set the IDR registers. */
279 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
280#ifdef EEPROM_WRITE
281 {
282 int i;
283 u8 cr;
284 /* Get the CR contents. */
285 get_registers(dev, CR, 1, &cr);
286 /* Set the WEPROM bit (eeprom write enable). */
287 cr |= 0x20;
288 set_registers(dev, CR, 1, &cr);
289 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
290 so we need to split them up. */
291 for (i = 0; i * 2 < netdev->addr_len; i++) {
292 set_registers(dev, IDR_EEPROM + (i * 2), 2,
293 netdev->dev_addr + (i * 2));
294 }
295 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
296 cr &= 0xdf;
297 set_registers(dev, CR, 1, &cr);
298 }
299#endif
300 return 0;
301}
302
303static int rtl8150_reset(rtl8150_t * dev)
304{
305 u8 data = 0x10;
306 int i = HZ;
307
308 set_registers(dev, CR, 1, &data);
309 do {
310 get_registers(dev, CR, 1, &data);
311 } while ((data & 0x10) && --i);
312
313 return (i > 0) ? 1 : 0;
314}
315
316static int alloc_all_urbs(rtl8150_t * dev)
317{
318 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
319 if (!dev->rx_urb)
320 return 0;
321 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
322 if (!dev->tx_urb) {
323 usb_free_urb(dev->rx_urb);
324 return 0;
325 }
326 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
327 if (!dev->intr_urb) {
328 usb_free_urb(dev->rx_urb);
329 usb_free_urb(dev->tx_urb);
330 return 0;
331 }
332
333 return 1;
334}
335
336static void free_all_urbs(rtl8150_t * dev)
337{
338 usb_free_urb(dev->rx_urb);
339 usb_free_urb(dev->tx_urb);
340 usb_free_urb(dev->intr_urb);
341}
342
343static void unlink_all_urbs(rtl8150_t * dev)
344{
345 usb_kill_urb(dev->rx_urb);
346 usb_kill_urb(dev->tx_urb);
347 usb_kill_urb(dev->intr_urb);
348}
349
350static inline struct sk_buff *pull_skb(rtl8150_t *dev)
351{
352 struct sk_buff *skb;
353 int i;
354
355 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
356 if (dev->rx_skb_pool[i]) {
357 skb = dev->rx_skb_pool[i];
358 dev->rx_skb_pool[i] = NULL;
359 return skb;
360 }
361 }
362 return NULL;
363}
364
365static void read_bulk_callback(struct urb *urb)
366{
367 rtl8150_t *dev;
368 unsigned pkt_len, res;
369 struct sk_buff *skb;
370 struct net_device *netdev;
371 u16 rx_stat;
372 int status = urb->status;
373 int result;
374
375 dev = urb->context;
376 if (!dev)
377 return;
378 if (test_bit(RTL8150_UNPLUG, &dev->flags))
379 return;
380 netdev = dev->netdev;
381 if (!netif_device_present(netdev))
382 return;
383
384 switch (status) {
385 case 0:
386 break;
387 case -ENOENT:
388 return; /* the urb is in unlink state */
389 case -ETIME:
390 if (printk_ratelimit())
391 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
392 goto goon;
393 default:
394 if (printk_ratelimit())
395 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
396 goto goon;
397 }
398
399 if (!dev->rx_skb)
400 goto resched;
401 /* protect against short packets (tell me why we got some?!?) */
402 if (urb->actual_length < 4)
403 goto goon;
404
405 res = urb->actual_length;
406 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
407 pkt_len = res - 4;
408
409 skb_put(dev->rx_skb, pkt_len);
410 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
411 netif_rx(dev->rx_skb);
412 netdev->stats.rx_packets++;
413 netdev->stats.rx_bytes += pkt_len;
414
415 spin_lock(&dev->rx_pool_lock);
416 skb = pull_skb(dev);
417 spin_unlock(&dev->rx_pool_lock);
418 if (!skb)
419 goto resched;
420
421 dev->rx_skb = skb;
422goon:
423 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
424 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
425 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
426 if (result == -ENODEV)
427 netif_device_detach(dev->netdev);
428 else if (result) {
429 set_bit(RX_URB_FAIL, &dev->flags);
430 goto resched;
431 } else {
432 clear_bit(RX_URB_FAIL, &dev->flags);
433 }
434
435 return;
436resched:
437 tasklet_schedule(&dev->tl);
438}
439
440static void write_bulk_callback(struct urb *urb)
441{
442 rtl8150_t *dev;
443 int status = urb->status;
444
445 dev = urb->context;
446 if (!dev)
447 return;
448 dev_kfree_skb_irq(dev->tx_skb);
449 if (!netif_device_present(dev->netdev))
450 return;
451 if (status)
452 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
453 dev->netdev->name, status);
454 netif_trans_update(dev->netdev);
455 netif_wake_queue(dev->netdev);
456}
457
458static void intr_callback(struct urb *urb)
459{
460 rtl8150_t *dev;
461 __u8 *d;
462 int status = urb->status;
463 int res;
464
465 dev = urb->context;
466 if (!dev)
467 return;
468 switch (status) {
469 case 0: /* success */
470 break;
471 case -ECONNRESET: /* unlink */
472 case -ENOENT:
473 case -ESHUTDOWN:
474 return;
475 /* -EPIPE: should clear the halt */
476 default:
477 dev_info(&urb->dev->dev, "%s: intr status %d\n",
478 dev->netdev->name, status);
479 goto resubmit;
480 }
481
482 d = urb->transfer_buffer;
483 if (d[0] & TSR_ERRORS) {
484 dev->netdev->stats.tx_errors++;
485 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
486 dev->netdev->stats.tx_aborted_errors++;
487 if (d[INT_TSR] & TSR_LCOL)
488 dev->netdev->stats.tx_window_errors++;
489 if (d[INT_TSR] & TSR_LOSS_CRS)
490 dev->netdev->stats.tx_carrier_errors++;
491 }
492 /* Report link status changes to the network stack */
493 if ((d[INT_MSR] & MSR_LINK) == 0) {
494 if (netif_carrier_ok(dev->netdev)) {
495 netif_carrier_off(dev->netdev);
496 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
497 }
498 } else {
499 if (!netif_carrier_ok(dev->netdev)) {
500 netif_carrier_on(dev->netdev);
501 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
502 }
503 }
504
505resubmit:
506 res = usb_submit_urb (urb, GFP_ATOMIC);
507 if (res == -ENODEV)
508 netif_device_detach(dev->netdev);
509 else if (res)
510 dev_err(&dev->udev->dev,
511 "can't resubmit intr, %s-%s/input0, status %d\n",
512 dev->udev->bus->bus_name, dev->udev->devpath, res);
513}
514
515static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
516{
517 rtl8150_t *dev = usb_get_intfdata(intf);
518
519 netif_device_detach(dev->netdev);
520
521 if (netif_running(dev->netdev)) {
522 usb_kill_urb(dev->rx_urb);
523 usb_kill_urb(dev->intr_urb);
524 }
525 return 0;
526}
527
528static int rtl8150_resume(struct usb_interface *intf)
529{
530 rtl8150_t *dev = usb_get_intfdata(intf);
531
532 netif_device_attach(dev->netdev);
533 if (netif_running(dev->netdev)) {
534 dev->rx_urb->status = 0;
535 dev->rx_urb->actual_length = 0;
536 read_bulk_callback(dev->rx_urb);
537
538 dev->intr_urb->status = 0;
539 dev->intr_urb->actual_length = 0;
540 intr_callback(dev->intr_urb);
541 }
542 return 0;
543}
544
545/*
546**
547** network related part of the code
548**
549*/
550
551static void fill_skb_pool(rtl8150_t *dev)
552{
553 struct sk_buff *skb;
554 int i;
555
556 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
557 if (dev->rx_skb_pool[i])
558 continue;
559 skb = dev_alloc_skb(RTL8150_MTU + 2);
560 if (!skb) {
561 return;
562 }
563 skb_reserve(skb, 2);
564 dev->rx_skb_pool[i] = skb;
565 }
566}
567
568static void free_skb_pool(rtl8150_t *dev)
569{
570 int i;
571
572 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
573 if (dev->rx_skb_pool[i])
574 dev_kfree_skb(dev->rx_skb_pool[i]);
575}
576
577static void rx_fixup(unsigned long data)
578{
579 struct rtl8150 *dev = (struct rtl8150 *)data;
580 struct sk_buff *skb;
581 int status;
582
583 spin_lock_irq(&dev->rx_pool_lock);
584 fill_skb_pool(dev);
585 spin_unlock_irq(&dev->rx_pool_lock);
586 if (test_bit(RX_URB_FAIL, &dev->flags))
587 if (dev->rx_skb)
588 goto try_again;
589 spin_lock_irq(&dev->rx_pool_lock);
590 skb = pull_skb(dev);
591 spin_unlock_irq(&dev->rx_pool_lock);
592 if (skb == NULL)
593 goto tlsched;
594 dev->rx_skb = skb;
595 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
596 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
597try_again:
598 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
599 if (status == -ENODEV) {
600 netif_device_detach(dev->netdev);
601 } else if (status) {
602 set_bit(RX_URB_FAIL, &dev->flags);
603 goto tlsched;
604 } else {
605 clear_bit(RX_URB_FAIL, &dev->flags);
606 }
607
608 return;
609tlsched:
610 tasklet_schedule(&dev->tl);
611}
612
613static int enable_net_traffic(rtl8150_t * dev)
614{
615 u8 cr, tcr, rcr, msr;
616
617 if (!rtl8150_reset(dev)) {
618 dev_warn(&dev->udev->dev, "device reset failed\n");
619 }
620 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
621 rcr = 0x9e;
622 tcr = 0xd8;
623 cr = 0x0c;
624 if (!(rcr & 0x80))
625 set_bit(RTL8150_HW_CRC, &dev->flags);
626 set_registers(dev, RCR, 1, &rcr);
627 set_registers(dev, TCR, 1, &tcr);
628 set_registers(dev, CR, 1, &cr);
629 get_registers(dev, MSR, 1, &msr);
630
631 return 0;
632}
633
634static void disable_net_traffic(rtl8150_t * dev)
635{
636 u8 cr;
637
638 get_registers(dev, CR, 1, &cr);
639 cr &= 0xf3;
640 set_registers(dev, CR, 1, &cr);
641}
642
643static void rtl8150_tx_timeout(struct net_device *netdev)
644{
645 rtl8150_t *dev = netdev_priv(netdev);
646 dev_warn(&netdev->dev, "Tx timeout.\n");
647 usb_unlink_urb(dev->tx_urb);
648 netdev->stats.tx_errors++;
649}
650
651static void rtl8150_set_multicast(struct net_device *netdev)
652{
653 rtl8150_t *dev = netdev_priv(netdev);
654 u16 rx_creg = 0x9e;
655
656 netif_stop_queue(netdev);
657 if (netdev->flags & IFF_PROMISC) {
658 rx_creg |= 0x0001;
659 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
660 } else if (!netdev_mc_empty(netdev) ||
661 (netdev->flags & IFF_ALLMULTI)) {
662 rx_creg &= 0xfffe;
663 rx_creg |= 0x0002;
664 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
665 } else {
666 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
667 rx_creg &= 0x00fc;
668 }
669 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
670 netif_wake_queue(netdev);
671}
672
673static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
674 struct net_device *netdev)
675{
676 rtl8150_t *dev = netdev_priv(netdev);
677 int count, res;
678
679 netif_stop_queue(netdev);
680 count = (skb->len < 60) ? 60 : skb->len;
681 count = (count & 0x3f) ? count : count + 1;
682 dev->tx_skb = skb;
683 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
684 skb->data, count, write_bulk_callback, dev);
685 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
686 /* Can we get/handle EPIPE here? */
687 if (res == -ENODEV)
688 netif_device_detach(dev->netdev);
689 else {
690 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
691 netdev->stats.tx_errors++;
692 netif_start_queue(netdev);
693 }
694 } else {
695 netdev->stats.tx_packets++;
696 netdev->stats.tx_bytes += skb->len;
697 netif_trans_update(netdev);
698 }
699
700 return NETDEV_TX_OK;
701}
702
703
704static void set_carrier(struct net_device *netdev)
705{
706 rtl8150_t *dev = netdev_priv(netdev);
707 short tmp;
708
709 get_registers(dev, CSCR, 2, &tmp);
710 if (tmp & CSCR_LINK_STATUS)
711 netif_carrier_on(netdev);
712 else
713 netif_carrier_off(netdev);
714}
715
716static int rtl8150_open(struct net_device *netdev)
717{
718 rtl8150_t *dev = netdev_priv(netdev);
719 int res;
720
721 if (dev->rx_skb == NULL)
722 dev->rx_skb = pull_skb(dev);
723 if (!dev->rx_skb)
724 return -ENOMEM;
725
726 set_registers(dev, IDR, 6, netdev->dev_addr);
727
728 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
729 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
730 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
731 if (res == -ENODEV)
732 netif_device_detach(dev->netdev);
733 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
734 return res;
735 }
736 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
737 dev->intr_buff, INTBUFSIZE, intr_callback,
738 dev, dev->intr_interval);
739 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
740 if (res == -ENODEV)
741 netif_device_detach(dev->netdev);
742 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
743 usb_kill_urb(dev->rx_urb);
744 return res;
745 }
746 enable_net_traffic(dev);
747 set_carrier(netdev);
748 netif_start_queue(netdev);
749
750 return res;
751}
752
753static int rtl8150_close(struct net_device *netdev)
754{
755 rtl8150_t *dev = netdev_priv(netdev);
756
757 netif_stop_queue(netdev);
758 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
759 disable_net_traffic(dev);
760 unlink_all_urbs(dev);
761
762 return 0;
763}
764
765static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
766{
767 rtl8150_t *dev = netdev_priv(netdev);
768
769 strlcpy(info->driver, driver_name, sizeof(info->driver));
770 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
771 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
772}
773
774static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
775{
776 rtl8150_t *dev = netdev_priv(netdev);
777 short lpa, bmcr;
778
779 ecmd->supported = (SUPPORTED_10baseT_Half |
780 SUPPORTED_10baseT_Full |
781 SUPPORTED_100baseT_Half |
782 SUPPORTED_100baseT_Full |
783 SUPPORTED_Autoneg |
784 SUPPORTED_TP | SUPPORTED_MII);
785 ecmd->port = PORT_TP;
786 ecmd->transceiver = XCVR_INTERNAL;
787 ecmd->phy_address = dev->phy;
788 get_registers(dev, BMCR, 2, &bmcr);
789 get_registers(dev, ANLP, 2, &lpa);
790 if (bmcr & BMCR_ANENABLE) {
791 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
792 SPEED_100 : SPEED_10);
793 ethtool_cmd_speed_set(ecmd, speed);
794 ecmd->autoneg = AUTONEG_ENABLE;
795 if (speed == SPEED_100)
796 ecmd->duplex = (lpa & LPA_100FULL) ?
797 DUPLEX_FULL : DUPLEX_HALF;
798 else
799 ecmd->duplex = (lpa & LPA_10FULL) ?
800 DUPLEX_FULL : DUPLEX_HALF;
801 } else {
802 ecmd->autoneg = AUTONEG_DISABLE;
803 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
804 SPEED_100 : SPEED_10));
805 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
806 DUPLEX_FULL : DUPLEX_HALF;
807 }
808 return 0;
809}
810
811static const struct ethtool_ops ops = {
812 .get_drvinfo = rtl8150_get_drvinfo,
813 .get_settings = rtl8150_get_settings,
814 .get_link = ethtool_op_get_link
815};
816
817static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
818{
819 rtl8150_t *dev = netdev_priv(netdev);
820 u16 *data = (u16 *) & rq->ifr_ifru;
821 int res = 0;
822
823 switch (cmd) {
824 case SIOCDEVPRIVATE:
825 data[0] = dev->phy;
826 case SIOCDEVPRIVATE + 1:
827 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
828 break;
829 case SIOCDEVPRIVATE + 2:
830 if (!capable(CAP_NET_ADMIN))
831 return -EPERM;
832 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
833 break;
834 default:
835 res = -EOPNOTSUPP;
836 }
837
838 return res;
839}
840
841static const struct net_device_ops rtl8150_netdev_ops = {
842 .ndo_open = rtl8150_open,
843 .ndo_stop = rtl8150_close,
844 .ndo_do_ioctl = rtl8150_ioctl,
845 .ndo_start_xmit = rtl8150_start_xmit,
846 .ndo_tx_timeout = rtl8150_tx_timeout,
847 .ndo_set_rx_mode = rtl8150_set_multicast,
848 .ndo_set_mac_address = rtl8150_set_mac_address,
849
850 .ndo_change_mtu = eth_change_mtu,
851 .ndo_validate_addr = eth_validate_addr,
852};
853
854static int rtl8150_probe(struct usb_interface *intf,
855 const struct usb_device_id *id)
856{
857 struct usb_device *udev = interface_to_usbdev(intf);
858 rtl8150_t *dev;
859 struct net_device *netdev;
860
861 netdev = alloc_etherdev(sizeof(rtl8150_t));
862 if (!netdev)
863 return -ENOMEM;
864
865 dev = netdev_priv(netdev);
866
867 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
868 if (!dev->intr_buff) {
869 free_netdev(netdev);
870 return -ENOMEM;
871 }
872
873 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
874 spin_lock_init(&dev->rx_pool_lock);
875
876 dev->udev = udev;
877 dev->netdev = netdev;
878 netdev->netdev_ops = &rtl8150_netdev_ops;
879 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
880 netdev->ethtool_ops = &ops;
881 dev->intr_interval = 100; /* 100ms */
882
883 if (!alloc_all_urbs(dev)) {
884 dev_err(&intf->dev, "out of memory\n");
885 goto out;
886 }
887 if (!rtl8150_reset(dev)) {
888 dev_err(&intf->dev, "couldn't reset the device\n");
889 goto out1;
890 }
891 fill_skb_pool(dev);
892 set_ethernet_addr(dev);
893
894 usb_set_intfdata(intf, dev);
895 SET_NETDEV_DEV(netdev, &intf->dev);
896 if (register_netdev(netdev) != 0) {
897 dev_err(&intf->dev, "couldn't register the device\n");
898 goto out2;
899 }
900
901 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
902
903 return 0;
904
905out2:
906 usb_set_intfdata(intf, NULL);
907 free_skb_pool(dev);
908out1:
909 free_all_urbs(dev);
910out:
911 kfree(dev->intr_buff);
912 free_netdev(netdev);
913 return -EIO;
914}
915
916static void rtl8150_disconnect(struct usb_interface *intf)
917{
918 rtl8150_t *dev = usb_get_intfdata(intf);
919
920 usb_set_intfdata(intf, NULL);
921 if (dev) {
922 set_bit(RTL8150_UNPLUG, &dev->flags);
923 tasklet_kill(&dev->tl);
924 unregister_netdev(dev->netdev);
925 unlink_all_urbs(dev);
926 free_all_urbs(dev);
927 free_skb_pool(dev);
928 if (dev->rx_skb)
929 dev_kfree_skb(dev->rx_skb);
930 kfree(dev->intr_buff);
931 free_netdev(dev->netdev);
932 }
933}
934
935static struct usb_driver rtl8150_driver = {
936 .name = driver_name,
937 .probe = rtl8150_probe,
938 .disconnect = rtl8150_disconnect,
939 .id_table = rtl8150_table,
940 .suspend = rtl8150_suspend,
941 .resume = rtl8150_resume,
942 .disable_hub_initiated_lpm = 1,
943};
944
945module_usb_driver(rtl8150_driver);
946
947MODULE_AUTHOR(DRIVER_AUTHOR);
948MODULE_DESCRIPTION(DRIVER_DESC);
949MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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