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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/init.h>
10#include <linux/signal.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13#include <linux/netdevice.h>
14#include <linux/etherdevice.h>
15#include <linux/mii.h>
16#include <linux/ethtool.h>
17#include <linux/usb.h>
18#include <asm/uaccess.h>
19
20/* Version Information */
21#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
22#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
23#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
24
25#define IDR 0x0120
26#define MAR 0x0126
27#define CR 0x012e
28#define TCR 0x012f
29#define RCR 0x0130
30#define TSR 0x0132
31#define RSR 0x0133
32#define CON0 0x0135
33#define CON1 0x0136
34#define MSR 0x0137
35#define PHYADD 0x0138
36#define PHYDAT 0x0139
37#define PHYCNT 0x013b
38#define GPPC 0x013d
39#define BMCR 0x0140
40#define BMSR 0x0142
41#define ANAR 0x0144
42#define ANLP 0x0146
43#define AER 0x0148
44#define CSCR 0x014C /* This one has the link status */
45#define CSCR_LINK_STATUS (1 << 3)
46
47#define IDR_EEPROM 0x1202
48
49#define PHY_READ 0
50#define PHY_WRITE 0x20
51#define PHY_GO 0x40
52
53#define MII_TIMEOUT 10
54#define INTBUFSIZE 8
55
56#define RTL8150_REQT_READ 0xc0
57#define RTL8150_REQT_WRITE 0x40
58#define RTL8150_REQ_GET_REGS 0x05
59#define RTL8150_REQ_SET_REGS 0x05
60
61
62/* Transmit status register errors */
63#define TSR_ECOL (1<<5)
64#define TSR_LCOL (1<<4)
65#define TSR_LOSS_CRS (1<<3)
66#define TSR_JBR (1<<2)
67#define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
68/* Receive status register errors */
69#define RSR_CRC (1<<2)
70#define RSR_FAE (1<<1)
71#define RSR_ERRORS (RSR_CRC | RSR_FAE)
72
73/* Media status register definitions */
74#define MSR_DUPLEX (1<<4)
75#define MSR_SPEED (1<<3)
76#define MSR_LINK (1<<2)
77
78/* Interrupt pipe data */
79#define INT_TSR 0x00
80#define INT_RSR 0x01
81#define INT_MSR 0x02
82#define INT_WAKSR 0x03
83#define INT_TXOK_CNT 0x04
84#define INT_RXLOST_CNT 0x05
85#define INT_CRERR_CNT 0x06
86#define INT_COL_CNT 0x07
87
88/* Transmit status register errors */
89#define TSR_ECOL (1<<5)
90#define TSR_LCOL (1<<4)
91#define TSR_LOSS_CRS (1<<3)
92#define TSR_JBR (1<<2)
93#define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
94/* Receive status register errors */
95#define RSR_CRC (1<<2)
96#define RSR_FAE (1<<1)
97#define RSR_ERRORS (RSR_CRC | RSR_FAE)
98
99/* Media status register definitions */
100#define MSR_DUPLEX (1<<4)
101#define MSR_SPEED (1<<3)
102#define MSR_LINK (1<<2)
103
104/* Interrupt pipe data */
105#define INT_TSR 0x00
106#define INT_RSR 0x01
107#define INT_MSR 0x02
108#define INT_WAKSR 0x03
109#define INT_TXOK_CNT 0x04
110#define INT_RXLOST_CNT 0x05
111#define INT_CRERR_CNT 0x06
112#define INT_COL_CNT 0x07
113
114
115#define RTL8150_MTU 1540
116#define RTL8150_TX_TIMEOUT (HZ)
117#define RX_SKB_POOL_SIZE 4
118
119/* rtl8150 flags */
120#define RTL8150_HW_CRC 0
121#define RX_REG_SET 1
122#define RTL8150_UNPLUG 2
123#define RX_URB_FAIL 3
124
125/* Define these values to match your device */
126#define VENDOR_ID_REALTEK 0x0bda
127#define VENDOR_ID_MELCO 0x0411
128#define VENDOR_ID_MICRONET 0x3980
129#define VENDOR_ID_LONGSHINE 0x07b8
130#define VENDOR_ID_OQO 0x1557
131#define VENDOR_ID_ZYXEL 0x0586
132
133#define PRODUCT_ID_RTL8150 0x8150
134#define PRODUCT_ID_LUAKTX 0x0012
135#define PRODUCT_ID_LCS8138TX 0x401a
136#define PRODUCT_ID_SP128AR 0x0003
137#define PRODUCT_ID_PRESTIGE 0x401a
138
139#undef EEPROM_WRITE
140
141/* table of devices that work with this driver */
142static struct usb_device_id rtl8150_table[] = {
143 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
144 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
145 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
146 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
147 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
148 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
149 {}
150};
151
152MODULE_DEVICE_TABLE(usb, rtl8150_table);
153
154struct rtl8150 {
155 unsigned long flags;
156 struct usb_device *udev;
157 struct tasklet_struct tl;
158 struct net_device *netdev;
159 struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
160 struct sk_buff *tx_skb, *rx_skb;
161 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
162 spinlock_t rx_pool_lock;
163 struct usb_ctrlrequest dr;
164 int intr_interval;
165 __le16 rx_creg;
166 u8 *intr_buff;
167 u8 phy;
168};
169
170typedef struct rtl8150 rtl8150_t;
171
172static void fill_skb_pool(rtl8150_t *);
173static void free_skb_pool(rtl8150_t *);
174static inline struct sk_buff *pull_skb(rtl8150_t *);
175static void rtl8150_disconnect(struct usb_interface *intf);
176static int rtl8150_probe(struct usb_interface *intf,
177 const struct usb_device_id *id);
178static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
179static int rtl8150_resume(struct usb_interface *intf);
180
181static const char driver_name [] = "rtl8150";
182
183static struct usb_driver rtl8150_driver = {
184 .name = driver_name,
185 .probe = rtl8150_probe,
186 .disconnect = rtl8150_disconnect,
187 .id_table = rtl8150_table,
188 .suspend = rtl8150_suspend,
189 .resume = rtl8150_resume
190};
191
192/*
193**
194** device related part of the code
195**
196*/
197static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
198{
199 return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
200 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
201 indx, 0, data, size, 500);
202}
203
204static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
205{
206 return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
207 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
208 indx, 0, data, size, 500);
209}
210
211static void ctrl_callback(struct urb *urb)
212{
213 rtl8150_t *dev;
214 int status = urb->status;
215
216 switch (status) {
217 case 0:
218 break;
219 case -EINPROGRESS:
220 break;
221 case -ENOENT:
222 break;
223 default:
224 if (printk_ratelimit())
225 dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
226 }
227 dev = urb->context;
228 clear_bit(RX_REG_SET, &dev->flags);
229}
230
231static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
232{
233 int ret;
234
235 if (test_bit(RX_REG_SET, &dev->flags))
236 return -EAGAIN;
237
238 dev->dr.bRequestType = RTL8150_REQT_WRITE;
239 dev->dr.bRequest = RTL8150_REQ_SET_REGS;
240 dev->dr.wValue = cpu_to_le16(indx);
241 dev->dr.wIndex = 0;
242 dev->dr.wLength = cpu_to_le16(size);
243 dev->ctrl_urb->transfer_buffer_length = size;
244 usb_fill_control_urb(dev->ctrl_urb, dev->udev,
245 usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
246 &dev->rx_creg, size, ctrl_callback, dev);
247 if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
248 if (ret == -ENODEV)
249 netif_device_detach(dev->netdev);
250 err("control request submission failed: %d", ret);
251 } else
252 set_bit(RX_REG_SET, &dev->flags);
253
254 return ret;
255}
256
257static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
258{
259 int i;
260 u8 data[3], tmp;
261
262 data[0] = phy;
263 data[1] = data[2] = 0;
264 tmp = indx | PHY_READ | PHY_GO;
265 i = 0;
266
267 set_registers(dev, PHYADD, sizeof(data), data);
268 set_registers(dev, PHYCNT, 1, &tmp);
269 do {
270 get_registers(dev, PHYCNT, 1, data);
271 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
272
273 if (i <= MII_TIMEOUT) {
274 get_registers(dev, PHYDAT, 2, data);
275 *reg = data[0] | (data[1] << 8);
276 return 0;
277 } else
278 return 1;
279}
280
281static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
282{
283 int i;
284 u8 data[3], tmp;
285
286 data[0] = phy;
287 data[1] = reg & 0xff;
288 data[2] = (reg >> 8) & 0xff;
289 tmp = indx | PHY_WRITE | PHY_GO;
290 i = 0;
291
292 set_registers(dev, PHYADD, sizeof(data), data);
293 set_registers(dev, PHYCNT, 1, &tmp);
294 do {
295 get_registers(dev, PHYCNT, 1, data);
296 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
297
298 if (i <= MII_TIMEOUT)
299 return 0;
300 else
301 return 1;
302}
303
304static inline void set_ethernet_addr(rtl8150_t * dev)
305{
306 u8 node_id[6];
307
308 get_registers(dev, IDR, sizeof(node_id), node_id);
309 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
310}
311
312static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
313{
314 struct sockaddr *addr = p;
315 rtl8150_t *dev = netdev_priv(netdev);
316
317 if (netif_running(netdev))
318 return -EBUSY;
319
320 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
321 dbg("%s: Setting MAC address to %pM\n", netdev->name, netdev->dev_addr);
322 /* Set the IDR registers. */
323 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
324#ifdef EEPROM_WRITE
325 {
326 int i;
327 u8 cr;
328 /* Get the CR contents. */
329 get_registers(dev, CR, 1, &cr);
330 /* Set the WEPROM bit (eeprom write enable). */
331 cr |= 0x20;
332 set_registers(dev, CR, 1, &cr);
333 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
334 so we need to split them up. */
335 for (i = 0; i * 2 < netdev->addr_len; i++) {
336 set_registers(dev, IDR_EEPROM + (i * 2), 2,
337 netdev->dev_addr + (i * 2));
338 }
339 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
340 cr &= 0xdf;
341 set_registers(dev, CR, 1, &cr);
342 }
343#endif
344 return 0;
345}
346
347static int rtl8150_reset(rtl8150_t * dev)
348{
349 u8 data = 0x10;
350 int i = HZ;
351
352 set_registers(dev, CR, 1, &data);
353 do {
354 get_registers(dev, CR, 1, &data);
355 } while ((data & 0x10) && --i);
356
357 return (i > 0) ? 1 : 0;
358}
359
360static int alloc_all_urbs(rtl8150_t * dev)
361{
362 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
363 if (!dev->rx_urb)
364 return 0;
365 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
366 if (!dev->tx_urb) {
367 usb_free_urb(dev->rx_urb);
368 return 0;
369 }
370 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
371 if (!dev->intr_urb) {
372 usb_free_urb(dev->rx_urb);
373 usb_free_urb(dev->tx_urb);
374 return 0;
375 }
376 dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
377 if (!dev->ctrl_urb) {
378 usb_free_urb(dev->rx_urb);
379 usb_free_urb(dev->tx_urb);
380 usb_free_urb(dev->intr_urb);
381 return 0;
382 }
383
384 return 1;
385}
386
387static void free_all_urbs(rtl8150_t * dev)
388{
389 usb_free_urb(dev->rx_urb);
390 usb_free_urb(dev->tx_urb);
391 usb_free_urb(dev->intr_urb);
392 usb_free_urb(dev->ctrl_urb);
393}
394
395static void unlink_all_urbs(rtl8150_t * dev)
396{
397 usb_kill_urb(dev->rx_urb);
398 usb_kill_urb(dev->tx_urb);
399 usb_kill_urb(dev->intr_urb);
400 usb_kill_urb(dev->ctrl_urb);
401}
402
403static inline struct sk_buff *pull_skb(rtl8150_t *dev)
404{
405 struct sk_buff *skb;
406 int i;
407
408 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
409 if (dev->rx_skb_pool[i]) {
410 skb = dev->rx_skb_pool[i];
411 dev->rx_skb_pool[i] = NULL;
412 return skb;
413 }
414 }
415 return NULL;
416}
417
418static void read_bulk_callback(struct urb *urb)
419{
420 rtl8150_t *dev;
421 unsigned pkt_len, res;
422 struct sk_buff *skb;
423 struct net_device *netdev;
424 u16 rx_stat;
425 int status = urb->status;
426 int result;
427
428 dev = urb->context;
429 if (!dev)
430 return;
431 if (test_bit(RTL8150_UNPLUG, &dev->flags))
432 return;
433 netdev = dev->netdev;
434 if (!netif_device_present(netdev))
435 return;
436
437 switch (status) {
438 case 0:
439 break;
440 case -ENOENT:
441 return; /* the urb is in unlink state */
442 case -ETIME:
443 if (printk_ratelimit())
444 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
445 goto goon;
446 default:
447 if (printk_ratelimit())
448 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
449 goto goon;
450 }
451
452 if (!dev->rx_skb)
453 goto resched;
454 /* protect against short packets (tell me why we got some?!?) */
455 if (urb->actual_length < 4)
456 goto goon;
457
458 res = urb->actual_length;
459 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
460 pkt_len = res - 4;
461
462 skb_put(dev->rx_skb, pkt_len);
463 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
464 netif_rx(dev->rx_skb);
465 netdev->stats.rx_packets++;
466 netdev->stats.rx_bytes += pkt_len;
467
468 spin_lock(&dev->rx_pool_lock);
469 skb = pull_skb(dev);
470 spin_unlock(&dev->rx_pool_lock);
471 if (!skb)
472 goto resched;
473
474 dev->rx_skb = skb;
475goon:
476 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
477 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
478 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
479 if (result == -ENODEV)
480 netif_device_detach(dev->netdev);
481 else if (result) {
482 set_bit(RX_URB_FAIL, &dev->flags);
483 goto resched;
484 } else {
485 clear_bit(RX_URB_FAIL, &dev->flags);
486 }
487
488 return;
489resched:
490 tasklet_schedule(&dev->tl);
491}
492
493static void rx_fixup(unsigned long data)
494{
495 rtl8150_t *dev;
496 struct sk_buff *skb;
497 int status;
498
499 dev = (rtl8150_t *)data;
500
501 spin_lock_irq(&dev->rx_pool_lock);
502 fill_skb_pool(dev);
503 spin_unlock_irq(&dev->rx_pool_lock);
504 if (test_bit(RX_URB_FAIL, &dev->flags))
505 if (dev->rx_skb)
506 goto try_again;
507 spin_lock_irq(&dev->rx_pool_lock);
508 skb = pull_skb(dev);
509 spin_unlock_irq(&dev->rx_pool_lock);
510 if (skb == NULL)
511 goto tlsched;
512 dev->rx_skb = skb;
513 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
514 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
515try_again:
516 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
517 if (status == -ENODEV) {
518 netif_device_detach(dev->netdev);
519 } else if (status) {
520 set_bit(RX_URB_FAIL, &dev->flags);
521 goto tlsched;
522 } else {
523 clear_bit(RX_URB_FAIL, &dev->flags);
524 }
525
526 return;
527tlsched:
528 tasklet_schedule(&dev->tl);
529}
530
531static void write_bulk_callback(struct urb *urb)
532{
533 rtl8150_t *dev;
534 int status = urb->status;
535
536 dev = urb->context;
537 if (!dev)
538 return;
539 dev_kfree_skb_irq(dev->tx_skb);
540 if (!netif_device_present(dev->netdev))
541 return;
542 if (status)
543 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
544 dev->netdev->name, status);
545 dev->netdev->trans_start = jiffies;
546 netif_wake_queue(dev->netdev);
547}
548
549static void intr_callback(struct urb *urb)
550{
551 rtl8150_t *dev;
552 __u8 *d;
553 int status = urb->status;
554 int res;
555
556 dev = urb->context;
557 if (!dev)
558 return;
559 switch (status) {
560 case 0: /* success */
561 break;
562 case -ECONNRESET: /* unlink */
563 case -ENOENT:
564 case -ESHUTDOWN:
565 return;
566 /* -EPIPE: should clear the halt */
567 default:
568 dev_info(&urb->dev->dev, "%s: intr status %d\n",
569 dev->netdev->name, status);
570 goto resubmit;
571 }
572
573 d = urb->transfer_buffer;
574 if (d[0] & TSR_ERRORS) {
575 dev->netdev->stats.tx_errors++;
576 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
577 dev->netdev->stats.tx_aborted_errors++;
578 if (d[INT_TSR] & TSR_LCOL)
579 dev->netdev->stats.tx_window_errors++;
580 if (d[INT_TSR] & TSR_LOSS_CRS)
581 dev->netdev->stats.tx_carrier_errors++;
582 }
583 /* Report link status changes to the network stack */
584 if ((d[INT_MSR] & MSR_LINK) == 0) {
585 if (netif_carrier_ok(dev->netdev)) {
586 netif_carrier_off(dev->netdev);
587 dbg("%s: LINK LOST\n", __func__);
588 }
589 } else {
590 if (!netif_carrier_ok(dev->netdev)) {
591 netif_carrier_on(dev->netdev);
592 dbg("%s: LINK CAME BACK\n", __func__);
593 }
594 }
595
596resubmit:
597 res = usb_submit_urb (urb, GFP_ATOMIC);
598 if (res == -ENODEV)
599 netif_device_detach(dev->netdev);
600 else if (res)
601 err ("can't resubmit intr, %s-%s/input0, status %d",
602 dev->udev->bus->bus_name,
603 dev->udev->devpath, res);
604}
605
606static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
607{
608 rtl8150_t *dev = usb_get_intfdata(intf);
609
610 netif_device_detach(dev->netdev);
611
612 if (netif_running(dev->netdev)) {
613 usb_kill_urb(dev->rx_urb);
614 usb_kill_urb(dev->intr_urb);
615 }
616 return 0;
617}
618
619static int rtl8150_resume(struct usb_interface *intf)
620{
621 rtl8150_t *dev = usb_get_intfdata(intf);
622
623 netif_device_attach(dev->netdev);
624 if (netif_running(dev->netdev)) {
625 dev->rx_urb->status = 0;
626 dev->rx_urb->actual_length = 0;
627 read_bulk_callback(dev->rx_urb);
628
629 dev->intr_urb->status = 0;
630 dev->intr_urb->actual_length = 0;
631 intr_callback(dev->intr_urb);
632 }
633 return 0;
634}
635
636/*
637**
638** network related part of the code
639**
640*/
641
642static void fill_skb_pool(rtl8150_t *dev)
643{
644 struct sk_buff *skb;
645 int i;
646
647 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
648 if (dev->rx_skb_pool[i])
649 continue;
650 skb = dev_alloc_skb(RTL8150_MTU + 2);
651 if (!skb) {
652 return;
653 }
654 skb_reserve(skb, 2);
655 dev->rx_skb_pool[i] = skb;
656 }
657}
658
659static void free_skb_pool(rtl8150_t *dev)
660{
661 int i;
662
663 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
664 if (dev->rx_skb_pool[i])
665 dev_kfree_skb(dev->rx_skb_pool[i]);
666}
667
668static int enable_net_traffic(rtl8150_t * dev)
669{
670 u8 cr, tcr, rcr, msr;
671
672 if (!rtl8150_reset(dev)) {
673 dev_warn(&dev->udev->dev, "device reset failed\n");
674 }
675 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
676 rcr = 0x9e;
677 dev->rx_creg = cpu_to_le16(rcr);
678 tcr = 0xd8;
679 cr = 0x0c;
680 if (!(rcr & 0x80))
681 set_bit(RTL8150_HW_CRC, &dev->flags);
682 set_registers(dev, RCR, 1, &rcr);
683 set_registers(dev, TCR, 1, &tcr);
684 set_registers(dev, CR, 1, &cr);
685 get_registers(dev, MSR, 1, &msr);
686
687 return 0;
688}
689
690static void disable_net_traffic(rtl8150_t * dev)
691{
692 u8 cr;
693
694 get_registers(dev, CR, 1, &cr);
695 cr &= 0xf3;
696 set_registers(dev, CR, 1, &cr);
697}
698
699static void rtl8150_tx_timeout(struct net_device *netdev)
700{
701 rtl8150_t *dev = netdev_priv(netdev);
702 dev_warn(&netdev->dev, "Tx timeout.\n");
703 usb_unlink_urb(dev->tx_urb);
704 netdev->stats.tx_errors++;
705}
706
707static void rtl8150_set_multicast(struct net_device *netdev)
708{
709 rtl8150_t *dev = netdev_priv(netdev);
710 netif_stop_queue(netdev);
711 if (netdev->flags & IFF_PROMISC) {
712 dev->rx_creg |= cpu_to_le16(0x0001);
713 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
714 } else if (!netdev_mc_empty(netdev) ||
715 (netdev->flags & IFF_ALLMULTI)) {
716 dev->rx_creg &= cpu_to_le16(0xfffe);
717 dev->rx_creg |= cpu_to_le16(0x0002);
718 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
719 } else {
720 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
721 dev->rx_creg &= cpu_to_le16(0x00fc);
722 }
723 async_set_registers(dev, RCR, 2);
724 netif_wake_queue(netdev);
725}
726
727static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
728 struct net_device *netdev)
729{
730 rtl8150_t *dev = netdev_priv(netdev);
731 int count, res;
732
733 netif_stop_queue(netdev);
734 count = (skb->len < 60) ? 60 : skb->len;
735 count = (count & 0x3f) ? count : count + 1;
736 dev->tx_skb = skb;
737 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
738 skb->data, count, write_bulk_callback, dev);
739 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
740 /* Can we get/handle EPIPE here? */
741 if (res == -ENODEV)
742 netif_device_detach(dev->netdev);
743 else {
744 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
745 netdev->stats.tx_errors++;
746 netif_start_queue(netdev);
747 }
748 } else {
749 netdev->stats.tx_packets++;
750 netdev->stats.tx_bytes += skb->len;
751 netdev->trans_start = jiffies;
752 }
753
754 return NETDEV_TX_OK;
755}
756
757
758static void set_carrier(struct net_device *netdev)
759{
760 rtl8150_t *dev = netdev_priv(netdev);
761 short tmp;
762
763 get_registers(dev, CSCR, 2, &tmp);
764 if (tmp & CSCR_LINK_STATUS)
765 netif_carrier_on(netdev);
766 else
767 netif_carrier_off(netdev);
768}
769
770static int rtl8150_open(struct net_device *netdev)
771{
772 rtl8150_t *dev = netdev_priv(netdev);
773 int res;
774
775 if (dev->rx_skb == NULL)
776 dev->rx_skb = pull_skb(dev);
777 if (!dev->rx_skb)
778 return -ENOMEM;
779
780 set_registers(dev, IDR, 6, netdev->dev_addr);
781
782 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
783 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
784 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
785 if (res == -ENODEV)
786 netif_device_detach(dev->netdev);
787 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
788 return res;
789 }
790 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
791 dev->intr_buff, INTBUFSIZE, intr_callback,
792 dev, dev->intr_interval);
793 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
794 if (res == -ENODEV)
795 netif_device_detach(dev->netdev);
796 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
797 usb_kill_urb(dev->rx_urb);
798 return res;
799 }
800 enable_net_traffic(dev);
801 set_carrier(netdev);
802 netif_start_queue(netdev);
803
804 return res;
805}
806
807static int rtl8150_close(struct net_device *netdev)
808{
809 rtl8150_t *dev = netdev_priv(netdev);
810 int res = 0;
811
812 netif_stop_queue(netdev);
813 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
814 disable_net_traffic(dev);
815 unlink_all_urbs(dev);
816
817 return res;
818}
819
820static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
821{
822 rtl8150_t *dev = netdev_priv(netdev);
823
824 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
825 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
826 usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
827}
828
829static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
830{
831 rtl8150_t *dev = netdev_priv(netdev);
832 short lpa, bmcr;
833
834 ecmd->supported = (SUPPORTED_10baseT_Half |
835 SUPPORTED_10baseT_Full |
836 SUPPORTED_100baseT_Half |
837 SUPPORTED_100baseT_Full |
838 SUPPORTED_Autoneg |
839 SUPPORTED_TP | SUPPORTED_MII);
840 ecmd->port = PORT_TP;
841 ecmd->transceiver = XCVR_INTERNAL;
842 ecmd->phy_address = dev->phy;
843 get_registers(dev, BMCR, 2, &bmcr);
844 get_registers(dev, ANLP, 2, &lpa);
845 if (bmcr & BMCR_ANENABLE) {
846 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
847 SPEED_100 : SPEED_10);
848 ethtool_cmd_speed_set(ecmd, speed);
849 ecmd->autoneg = AUTONEG_ENABLE;
850 if (speed == SPEED_100)
851 ecmd->duplex = (lpa & LPA_100FULL) ?
852 DUPLEX_FULL : DUPLEX_HALF;
853 else
854 ecmd->duplex = (lpa & LPA_10FULL) ?
855 DUPLEX_FULL : DUPLEX_HALF;
856 } else {
857 ecmd->autoneg = AUTONEG_DISABLE;
858 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
859 SPEED_100 : SPEED_10));
860 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
861 DUPLEX_FULL : DUPLEX_HALF;
862 }
863 return 0;
864}
865
866static const struct ethtool_ops ops = {
867 .get_drvinfo = rtl8150_get_drvinfo,
868 .get_settings = rtl8150_get_settings,
869 .get_link = ethtool_op_get_link
870};
871
872static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
873{
874 rtl8150_t *dev = netdev_priv(netdev);
875 u16 *data = (u16 *) & rq->ifr_ifru;
876 int res = 0;
877
878 switch (cmd) {
879 case SIOCDEVPRIVATE:
880 data[0] = dev->phy;
881 case SIOCDEVPRIVATE + 1:
882 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
883 break;
884 case SIOCDEVPRIVATE + 2:
885 if (!capable(CAP_NET_ADMIN))
886 return -EPERM;
887 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
888 break;
889 default:
890 res = -EOPNOTSUPP;
891 }
892
893 return res;
894}
895
896static const struct net_device_ops rtl8150_netdev_ops = {
897 .ndo_open = rtl8150_open,
898 .ndo_stop = rtl8150_close,
899 .ndo_do_ioctl = rtl8150_ioctl,
900 .ndo_start_xmit = rtl8150_start_xmit,
901 .ndo_tx_timeout = rtl8150_tx_timeout,
902 .ndo_set_multicast_list = rtl8150_set_multicast,
903 .ndo_set_mac_address = rtl8150_set_mac_address,
904
905 .ndo_change_mtu = eth_change_mtu,
906 .ndo_validate_addr = eth_validate_addr,
907};
908
909static int rtl8150_probe(struct usb_interface *intf,
910 const struct usb_device_id *id)
911{
912 struct usb_device *udev = interface_to_usbdev(intf);
913 rtl8150_t *dev;
914 struct net_device *netdev;
915
916 netdev = alloc_etherdev(sizeof(rtl8150_t));
917 if (!netdev) {
918 err("Out of memory");
919 return -ENOMEM;
920 }
921
922 dev = netdev_priv(netdev);
923
924 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
925 if (!dev->intr_buff) {
926 free_netdev(netdev);
927 return -ENOMEM;
928 }
929
930 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
931 spin_lock_init(&dev->rx_pool_lock);
932
933 dev->udev = udev;
934 dev->netdev = netdev;
935 netdev->netdev_ops = &rtl8150_netdev_ops;
936 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
937 SET_ETHTOOL_OPS(netdev, &ops);
938 dev->intr_interval = 100; /* 100ms */
939
940 if (!alloc_all_urbs(dev)) {
941 err("out of memory");
942 goto out;
943 }
944 if (!rtl8150_reset(dev)) {
945 err("couldn't reset the device");
946 goto out1;
947 }
948 fill_skb_pool(dev);
949 set_ethernet_addr(dev);
950
951 usb_set_intfdata(intf, dev);
952 SET_NETDEV_DEV(netdev, &intf->dev);
953 if (register_netdev(netdev) != 0) {
954 err("couldn't register the device");
955 goto out2;
956 }
957
958 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
959
960 return 0;
961
962out2:
963 usb_set_intfdata(intf, NULL);
964 free_skb_pool(dev);
965out1:
966 free_all_urbs(dev);
967out:
968 kfree(dev->intr_buff);
969 free_netdev(netdev);
970 return -EIO;
971}
972
973static void rtl8150_disconnect(struct usb_interface *intf)
974{
975 rtl8150_t *dev = usb_get_intfdata(intf);
976
977 usb_set_intfdata(intf, NULL);
978 if (dev) {
979 set_bit(RTL8150_UNPLUG, &dev->flags);
980 tasklet_kill(&dev->tl);
981 unregister_netdev(dev->netdev);
982 unlink_all_urbs(dev);
983 free_all_urbs(dev);
984 free_skb_pool(dev);
985 if (dev->rx_skb)
986 dev_kfree_skb(dev->rx_skb);
987 kfree(dev->intr_buff);
988 free_netdev(dev->netdev);
989 }
990}
991
992static int __init usb_rtl8150_init(void)
993{
994 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
995 DRIVER_DESC "\n");
996 return usb_register(&rtl8150_driver);
997}
998
999static void __exit usb_rtl8150_exit(void)
1000{
1001 usb_deregister(&rtl8150_driver);
1002}
1003
1004module_init(usb_rtl8150_init);
1005module_exit(usb_rtl8150_exit);
1006
1007MODULE_AUTHOR(DRIVER_AUTHOR);
1008MODULE_DESCRIPTION(DRIVER_DESC);
1009MODULE_LICENSE("GPL");
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/init.h>
10#include <linux/signal.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13#include <linux/netdevice.h>
14#include <linux/etherdevice.h>
15#include <linux/mii.h>
16#include <linux/ethtool.h>
17#include <linux/usb.h>
18#include <asm/uaccess.h>
19
20/* Version Information */
21#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
22#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
23#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
24
25#define IDR 0x0120
26#define MAR 0x0126
27#define CR 0x012e
28#define TCR 0x012f
29#define RCR 0x0130
30#define TSR 0x0132
31#define RSR 0x0133
32#define CON0 0x0135
33#define CON1 0x0136
34#define MSR 0x0137
35#define PHYADD 0x0138
36#define PHYDAT 0x0139
37#define PHYCNT 0x013b
38#define GPPC 0x013d
39#define BMCR 0x0140
40#define BMSR 0x0142
41#define ANAR 0x0144
42#define ANLP 0x0146
43#define AER 0x0148
44#define CSCR 0x014C /* This one has the link status */
45#define CSCR_LINK_STATUS (1 << 3)
46
47#define IDR_EEPROM 0x1202
48
49#define PHY_READ 0
50#define PHY_WRITE 0x20
51#define PHY_GO 0x40
52
53#define MII_TIMEOUT 10
54#define INTBUFSIZE 8
55
56#define RTL8150_REQT_READ 0xc0
57#define RTL8150_REQT_WRITE 0x40
58#define RTL8150_REQ_GET_REGS 0x05
59#define RTL8150_REQ_SET_REGS 0x05
60
61
62/* Transmit status register errors */
63#define TSR_ECOL (1<<5)
64#define TSR_LCOL (1<<4)
65#define TSR_LOSS_CRS (1<<3)
66#define TSR_JBR (1<<2)
67#define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
68/* Receive status register errors */
69#define RSR_CRC (1<<2)
70#define RSR_FAE (1<<1)
71#define RSR_ERRORS (RSR_CRC | RSR_FAE)
72
73/* Media status register definitions */
74#define MSR_DUPLEX (1<<4)
75#define MSR_SPEED (1<<3)
76#define MSR_LINK (1<<2)
77
78/* Interrupt pipe data */
79#define INT_TSR 0x00
80#define INT_RSR 0x01
81#define INT_MSR 0x02
82#define INT_WAKSR 0x03
83#define INT_TXOK_CNT 0x04
84#define INT_RXLOST_CNT 0x05
85#define INT_CRERR_CNT 0x06
86#define INT_COL_CNT 0x07
87
88
89#define RTL8150_MTU 1540
90#define RTL8150_TX_TIMEOUT (HZ)
91#define RX_SKB_POOL_SIZE 4
92
93/* rtl8150 flags */
94#define RTL8150_HW_CRC 0
95#define RX_REG_SET 1
96#define RTL8150_UNPLUG 2
97#define RX_URB_FAIL 3
98
99/* Define these values to match your device */
100#define VENDOR_ID_REALTEK 0x0bda
101#define VENDOR_ID_MELCO 0x0411
102#define VENDOR_ID_MICRONET 0x3980
103#define VENDOR_ID_LONGSHINE 0x07b8
104#define VENDOR_ID_OQO 0x1557
105#define VENDOR_ID_ZYXEL 0x0586
106
107#define PRODUCT_ID_RTL8150 0x8150
108#define PRODUCT_ID_LUAKTX 0x0012
109#define PRODUCT_ID_LCS8138TX 0x401a
110#define PRODUCT_ID_SP128AR 0x0003
111#define PRODUCT_ID_PRESTIGE 0x401a
112
113#undef EEPROM_WRITE
114
115/* table of devices that work with this driver */
116static struct usb_device_id rtl8150_table[] = {
117 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
118 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
119 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
120 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
121 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
122 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
123 {}
124};
125
126MODULE_DEVICE_TABLE(usb, rtl8150_table);
127
128struct rtl8150 {
129 unsigned long flags;
130 struct usb_device *udev;
131 struct tasklet_struct tl;
132 struct net_device *netdev;
133 struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
134 struct sk_buff *tx_skb, *rx_skb;
135 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
136 spinlock_t rx_pool_lock;
137 struct usb_ctrlrequest dr;
138 int intr_interval;
139 __le16 rx_creg;
140 u8 *intr_buff;
141 u8 phy;
142};
143
144typedef struct rtl8150 rtl8150_t;
145
146static const char driver_name [] = "rtl8150";
147
148/*
149**
150** device related part of the code
151**
152*/
153static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
154{
155 return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
156 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
157 indx, 0, data, size, 500);
158}
159
160static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
161{
162 return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
163 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
164 indx, 0, data, size, 500);
165}
166
167static void ctrl_callback(struct urb *urb)
168{
169 rtl8150_t *dev;
170 int status = urb->status;
171
172 switch (status) {
173 case 0:
174 break;
175 case -EINPROGRESS:
176 break;
177 case -ENOENT:
178 break;
179 default:
180 if (printk_ratelimit())
181 dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
182 }
183 dev = urb->context;
184 clear_bit(RX_REG_SET, &dev->flags);
185}
186
187static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
188{
189 int ret;
190
191 if (test_bit(RX_REG_SET, &dev->flags))
192 return -EAGAIN;
193
194 dev->dr.bRequestType = RTL8150_REQT_WRITE;
195 dev->dr.bRequest = RTL8150_REQ_SET_REGS;
196 dev->dr.wValue = cpu_to_le16(indx);
197 dev->dr.wIndex = 0;
198 dev->dr.wLength = cpu_to_le16(size);
199 dev->ctrl_urb->transfer_buffer_length = size;
200 usb_fill_control_urb(dev->ctrl_urb, dev->udev,
201 usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
202 &dev->rx_creg, size, ctrl_callback, dev);
203 if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
204 if (ret == -ENODEV)
205 netif_device_detach(dev->netdev);
206 dev_err(&dev->udev->dev,
207 "control request submission failed: %d\n", ret);
208 } else
209 set_bit(RX_REG_SET, &dev->flags);
210
211 return ret;
212}
213
214static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
215{
216 int i;
217 u8 data[3], tmp;
218
219 data[0] = phy;
220 data[1] = data[2] = 0;
221 tmp = indx | PHY_READ | PHY_GO;
222 i = 0;
223
224 set_registers(dev, PHYADD, sizeof(data), data);
225 set_registers(dev, PHYCNT, 1, &tmp);
226 do {
227 get_registers(dev, PHYCNT, 1, data);
228 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
229
230 if (i <= MII_TIMEOUT) {
231 get_registers(dev, PHYDAT, 2, data);
232 *reg = data[0] | (data[1] << 8);
233 return 0;
234 } else
235 return 1;
236}
237
238static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
239{
240 int i;
241 u8 data[3], tmp;
242
243 data[0] = phy;
244 data[1] = reg & 0xff;
245 data[2] = (reg >> 8) & 0xff;
246 tmp = indx | PHY_WRITE | PHY_GO;
247 i = 0;
248
249 set_registers(dev, PHYADD, sizeof(data), data);
250 set_registers(dev, PHYCNT, 1, &tmp);
251 do {
252 get_registers(dev, PHYCNT, 1, data);
253 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
254
255 if (i <= MII_TIMEOUT)
256 return 0;
257 else
258 return 1;
259}
260
261static inline void set_ethernet_addr(rtl8150_t * dev)
262{
263 u8 node_id[6];
264
265 get_registers(dev, IDR, sizeof(node_id), node_id);
266 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
267}
268
269static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
270{
271 struct sockaddr *addr = p;
272 rtl8150_t *dev = netdev_priv(netdev);
273
274 if (netif_running(netdev))
275 return -EBUSY;
276
277 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
278 dbg("%s: Setting MAC address to %pM\n", netdev->name, netdev->dev_addr);
279 /* Set the IDR registers. */
280 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
281#ifdef EEPROM_WRITE
282 {
283 int i;
284 u8 cr;
285 /* Get the CR contents. */
286 get_registers(dev, CR, 1, &cr);
287 /* Set the WEPROM bit (eeprom write enable). */
288 cr |= 0x20;
289 set_registers(dev, CR, 1, &cr);
290 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
291 so we need to split them up. */
292 for (i = 0; i * 2 < netdev->addr_len; i++) {
293 set_registers(dev, IDR_EEPROM + (i * 2), 2,
294 netdev->dev_addr + (i * 2));
295 }
296 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
297 cr &= 0xdf;
298 set_registers(dev, CR, 1, &cr);
299 }
300#endif
301 return 0;
302}
303
304static int rtl8150_reset(rtl8150_t * dev)
305{
306 u8 data = 0x10;
307 int i = HZ;
308
309 set_registers(dev, CR, 1, &data);
310 do {
311 get_registers(dev, CR, 1, &data);
312 } while ((data & 0x10) && --i);
313
314 return (i > 0) ? 1 : 0;
315}
316
317static int alloc_all_urbs(rtl8150_t * dev)
318{
319 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
320 if (!dev->rx_urb)
321 return 0;
322 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
323 if (!dev->tx_urb) {
324 usb_free_urb(dev->rx_urb);
325 return 0;
326 }
327 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
328 if (!dev->intr_urb) {
329 usb_free_urb(dev->rx_urb);
330 usb_free_urb(dev->tx_urb);
331 return 0;
332 }
333 dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
334 if (!dev->ctrl_urb) {
335 usb_free_urb(dev->rx_urb);
336 usb_free_urb(dev->tx_urb);
337 usb_free_urb(dev->intr_urb);
338 return 0;
339 }
340
341 return 1;
342}
343
344static void free_all_urbs(rtl8150_t * dev)
345{
346 usb_free_urb(dev->rx_urb);
347 usb_free_urb(dev->tx_urb);
348 usb_free_urb(dev->intr_urb);
349 usb_free_urb(dev->ctrl_urb);
350}
351
352static void unlink_all_urbs(rtl8150_t * dev)
353{
354 usb_kill_urb(dev->rx_urb);
355 usb_kill_urb(dev->tx_urb);
356 usb_kill_urb(dev->intr_urb);
357 usb_kill_urb(dev->ctrl_urb);
358}
359
360static inline struct sk_buff *pull_skb(rtl8150_t *dev)
361{
362 struct sk_buff *skb;
363 int i;
364
365 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
366 if (dev->rx_skb_pool[i]) {
367 skb = dev->rx_skb_pool[i];
368 dev->rx_skb_pool[i] = NULL;
369 return skb;
370 }
371 }
372 return NULL;
373}
374
375static void read_bulk_callback(struct urb *urb)
376{
377 rtl8150_t *dev;
378 unsigned pkt_len, res;
379 struct sk_buff *skb;
380 struct net_device *netdev;
381 u16 rx_stat;
382 int status = urb->status;
383 int result;
384
385 dev = urb->context;
386 if (!dev)
387 return;
388 if (test_bit(RTL8150_UNPLUG, &dev->flags))
389 return;
390 netdev = dev->netdev;
391 if (!netif_device_present(netdev))
392 return;
393
394 switch (status) {
395 case 0:
396 break;
397 case -ENOENT:
398 return; /* the urb is in unlink state */
399 case -ETIME:
400 if (printk_ratelimit())
401 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
402 goto goon;
403 default:
404 if (printk_ratelimit())
405 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
406 goto goon;
407 }
408
409 if (!dev->rx_skb)
410 goto resched;
411 /* protect against short packets (tell me why we got some?!?) */
412 if (urb->actual_length < 4)
413 goto goon;
414
415 res = urb->actual_length;
416 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
417 pkt_len = res - 4;
418
419 skb_put(dev->rx_skb, pkt_len);
420 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
421 netif_rx(dev->rx_skb);
422 netdev->stats.rx_packets++;
423 netdev->stats.rx_bytes += pkt_len;
424
425 spin_lock(&dev->rx_pool_lock);
426 skb = pull_skb(dev);
427 spin_unlock(&dev->rx_pool_lock);
428 if (!skb)
429 goto resched;
430
431 dev->rx_skb = skb;
432goon:
433 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
434 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
435 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
436 if (result == -ENODEV)
437 netif_device_detach(dev->netdev);
438 else if (result) {
439 set_bit(RX_URB_FAIL, &dev->flags);
440 goto resched;
441 } else {
442 clear_bit(RX_URB_FAIL, &dev->flags);
443 }
444
445 return;
446resched:
447 tasklet_schedule(&dev->tl);
448}
449
450static void write_bulk_callback(struct urb *urb)
451{
452 rtl8150_t *dev;
453 int status = urb->status;
454
455 dev = urb->context;
456 if (!dev)
457 return;
458 dev_kfree_skb_irq(dev->tx_skb);
459 if (!netif_device_present(dev->netdev))
460 return;
461 if (status)
462 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
463 dev->netdev->name, status);
464 dev->netdev->trans_start = jiffies;
465 netif_wake_queue(dev->netdev);
466}
467
468static void intr_callback(struct urb *urb)
469{
470 rtl8150_t *dev;
471 __u8 *d;
472 int status = urb->status;
473 int res;
474
475 dev = urb->context;
476 if (!dev)
477 return;
478 switch (status) {
479 case 0: /* success */
480 break;
481 case -ECONNRESET: /* unlink */
482 case -ENOENT:
483 case -ESHUTDOWN:
484 return;
485 /* -EPIPE: should clear the halt */
486 default:
487 dev_info(&urb->dev->dev, "%s: intr status %d\n",
488 dev->netdev->name, status);
489 goto resubmit;
490 }
491
492 d = urb->transfer_buffer;
493 if (d[0] & TSR_ERRORS) {
494 dev->netdev->stats.tx_errors++;
495 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
496 dev->netdev->stats.tx_aborted_errors++;
497 if (d[INT_TSR] & TSR_LCOL)
498 dev->netdev->stats.tx_window_errors++;
499 if (d[INT_TSR] & TSR_LOSS_CRS)
500 dev->netdev->stats.tx_carrier_errors++;
501 }
502 /* Report link status changes to the network stack */
503 if ((d[INT_MSR] & MSR_LINK) == 0) {
504 if (netif_carrier_ok(dev->netdev)) {
505 netif_carrier_off(dev->netdev);
506 dbg("%s: LINK LOST\n", __func__);
507 }
508 } else {
509 if (!netif_carrier_ok(dev->netdev)) {
510 netif_carrier_on(dev->netdev);
511 dbg("%s: LINK CAME BACK\n", __func__);
512 }
513 }
514
515resubmit:
516 res = usb_submit_urb (urb, GFP_ATOMIC);
517 if (res == -ENODEV)
518 netif_device_detach(dev->netdev);
519 else if (res)
520 dev_err(&dev->udev->dev,
521 "can't resubmit intr, %s-%s/input0, status %d\n",
522 dev->udev->bus->bus_name, dev->udev->devpath, res);
523}
524
525static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
526{
527 rtl8150_t *dev = usb_get_intfdata(intf);
528
529 netif_device_detach(dev->netdev);
530
531 if (netif_running(dev->netdev)) {
532 usb_kill_urb(dev->rx_urb);
533 usb_kill_urb(dev->intr_urb);
534 }
535 return 0;
536}
537
538static int rtl8150_resume(struct usb_interface *intf)
539{
540 rtl8150_t *dev = usb_get_intfdata(intf);
541
542 netif_device_attach(dev->netdev);
543 if (netif_running(dev->netdev)) {
544 dev->rx_urb->status = 0;
545 dev->rx_urb->actual_length = 0;
546 read_bulk_callback(dev->rx_urb);
547
548 dev->intr_urb->status = 0;
549 dev->intr_urb->actual_length = 0;
550 intr_callback(dev->intr_urb);
551 }
552 return 0;
553}
554
555/*
556**
557** network related part of the code
558**
559*/
560
561static void fill_skb_pool(rtl8150_t *dev)
562{
563 struct sk_buff *skb;
564 int i;
565
566 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
567 if (dev->rx_skb_pool[i])
568 continue;
569 skb = dev_alloc_skb(RTL8150_MTU + 2);
570 if (!skb) {
571 return;
572 }
573 skb_reserve(skb, 2);
574 dev->rx_skb_pool[i] = skb;
575 }
576}
577
578static void free_skb_pool(rtl8150_t *dev)
579{
580 int i;
581
582 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
583 if (dev->rx_skb_pool[i])
584 dev_kfree_skb(dev->rx_skb_pool[i]);
585}
586
587static void rx_fixup(unsigned long data)
588{
589 struct rtl8150 *dev = (struct rtl8150 *)data;
590 struct sk_buff *skb;
591 int status;
592
593 spin_lock_irq(&dev->rx_pool_lock);
594 fill_skb_pool(dev);
595 spin_unlock_irq(&dev->rx_pool_lock);
596 if (test_bit(RX_URB_FAIL, &dev->flags))
597 if (dev->rx_skb)
598 goto try_again;
599 spin_lock_irq(&dev->rx_pool_lock);
600 skb = pull_skb(dev);
601 spin_unlock_irq(&dev->rx_pool_lock);
602 if (skb == NULL)
603 goto tlsched;
604 dev->rx_skb = skb;
605 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
606 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
607try_again:
608 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
609 if (status == -ENODEV) {
610 netif_device_detach(dev->netdev);
611 } else if (status) {
612 set_bit(RX_URB_FAIL, &dev->flags);
613 goto tlsched;
614 } else {
615 clear_bit(RX_URB_FAIL, &dev->flags);
616 }
617
618 return;
619tlsched:
620 tasklet_schedule(&dev->tl);
621}
622
623static int enable_net_traffic(rtl8150_t * dev)
624{
625 u8 cr, tcr, rcr, msr;
626
627 if (!rtl8150_reset(dev)) {
628 dev_warn(&dev->udev->dev, "device reset failed\n");
629 }
630 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
631 rcr = 0x9e;
632 dev->rx_creg = cpu_to_le16(rcr);
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
645static 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
654static void rtl8150_tx_timeout(struct net_device *netdev)
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
662static void rtl8150_set_multicast(struct net_device *netdev)
663{
664 rtl8150_t *dev = netdev_priv(netdev);
665 netif_stop_queue(netdev);
666 if (netdev->flags & IFF_PROMISC) {
667 dev->rx_creg |= cpu_to_le16(0x0001);
668 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
669 } else if (!netdev_mc_empty(netdev) ||
670 (netdev->flags & IFF_ALLMULTI)) {
671 dev->rx_creg &= cpu_to_le16(0xfffe);
672 dev->rx_creg |= cpu_to_le16(0x0002);
673 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
674 } else {
675 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
676 dev->rx_creg &= cpu_to_le16(0x00fc);
677 }
678 async_set_registers(dev, RCR, 2);
679 netif_wake_queue(netdev);
680}
681
682static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
683 struct net_device *netdev)
684{
685 rtl8150_t *dev = netdev_priv(netdev);
686 int count, res;
687
688 netif_stop_queue(netdev);
689 count = (skb->len < 60) ? 60 : skb->len;
690 count = (count & 0x3f) ? count : count + 1;
691 dev->tx_skb = skb;
692 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
693 skb->data, count, write_bulk_callback, dev);
694 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
695 /* Can we get/handle EPIPE here? */
696 if (res == -ENODEV)
697 netif_device_detach(dev->netdev);
698 else {
699 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
700 netdev->stats.tx_errors++;
701 netif_start_queue(netdev);
702 }
703 } else {
704 netdev->stats.tx_packets++;
705 netdev->stats.tx_bytes += skb->len;
706 netdev->trans_start = jiffies;
707 }
708
709 return NETDEV_TX_OK;
710}
711
712
713static void set_carrier(struct net_device *netdev)
714{
715 rtl8150_t *dev = netdev_priv(netdev);
716 short tmp;
717
718 get_registers(dev, CSCR, 2, &tmp);
719 if (tmp & CSCR_LINK_STATUS)
720 netif_carrier_on(netdev);
721 else
722 netif_carrier_off(netdev);
723}
724
725static int rtl8150_open(struct net_device *netdev)
726{
727 rtl8150_t *dev = netdev_priv(netdev);
728 int res;
729
730 if (dev->rx_skb == NULL)
731 dev->rx_skb = pull_skb(dev);
732 if (!dev->rx_skb)
733 return -ENOMEM;
734
735 set_registers(dev, IDR, 6, netdev->dev_addr);
736
737 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
738 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
739 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
740 if (res == -ENODEV)
741 netif_device_detach(dev->netdev);
742 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
743 return res;
744 }
745 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
746 dev->intr_buff, INTBUFSIZE, intr_callback,
747 dev, dev->intr_interval);
748 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
749 if (res == -ENODEV)
750 netif_device_detach(dev->netdev);
751 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
752 usb_kill_urb(dev->rx_urb);
753 return res;
754 }
755 enable_net_traffic(dev);
756 set_carrier(netdev);
757 netif_start_queue(netdev);
758
759 return res;
760}
761
762static int rtl8150_close(struct net_device *netdev)
763{
764 rtl8150_t *dev = netdev_priv(netdev);
765 int res = 0;
766
767 netif_stop_queue(netdev);
768 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
769 disable_net_traffic(dev);
770 unlink_all_urbs(dev);
771
772 return res;
773}
774
775static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
776{
777 rtl8150_t *dev = netdev_priv(netdev);
778
779 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
780 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
781 usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
782}
783
784static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
785{
786 rtl8150_t *dev = netdev_priv(netdev);
787 short lpa, bmcr;
788
789 ecmd->supported = (SUPPORTED_10baseT_Half |
790 SUPPORTED_10baseT_Full |
791 SUPPORTED_100baseT_Half |
792 SUPPORTED_100baseT_Full |
793 SUPPORTED_Autoneg |
794 SUPPORTED_TP | SUPPORTED_MII);
795 ecmd->port = PORT_TP;
796 ecmd->transceiver = XCVR_INTERNAL;
797 ecmd->phy_address = dev->phy;
798 get_registers(dev, BMCR, 2, &bmcr);
799 get_registers(dev, ANLP, 2, &lpa);
800 if (bmcr & BMCR_ANENABLE) {
801 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
802 SPEED_100 : SPEED_10);
803 ethtool_cmd_speed_set(ecmd, speed);
804 ecmd->autoneg = AUTONEG_ENABLE;
805 if (speed == SPEED_100)
806 ecmd->duplex = (lpa & LPA_100FULL) ?
807 DUPLEX_FULL : DUPLEX_HALF;
808 else
809 ecmd->duplex = (lpa & LPA_10FULL) ?
810 DUPLEX_FULL : DUPLEX_HALF;
811 } else {
812 ecmd->autoneg = AUTONEG_DISABLE;
813 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
814 SPEED_100 : SPEED_10));
815 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
816 DUPLEX_FULL : DUPLEX_HALF;
817 }
818 return 0;
819}
820
821static const struct ethtool_ops ops = {
822 .get_drvinfo = rtl8150_get_drvinfo,
823 .get_settings = rtl8150_get_settings,
824 .get_link = ethtool_op_get_link
825};
826
827static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
828{
829 rtl8150_t *dev = netdev_priv(netdev);
830 u16 *data = (u16 *) & rq->ifr_ifru;
831 int res = 0;
832
833 switch (cmd) {
834 case SIOCDEVPRIVATE:
835 data[0] = dev->phy;
836 case SIOCDEVPRIVATE + 1:
837 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
838 break;
839 case SIOCDEVPRIVATE + 2:
840 if (!capable(CAP_NET_ADMIN))
841 return -EPERM;
842 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
843 break;
844 default:
845 res = -EOPNOTSUPP;
846 }
847
848 return res;
849}
850
851static const struct net_device_ops rtl8150_netdev_ops = {
852 .ndo_open = rtl8150_open,
853 .ndo_stop = rtl8150_close,
854 .ndo_do_ioctl = rtl8150_ioctl,
855 .ndo_start_xmit = rtl8150_start_xmit,
856 .ndo_tx_timeout = rtl8150_tx_timeout,
857 .ndo_set_rx_mode = rtl8150_set_multicast,
858 .ndo_set_mac_address = rtl8150_set_mac_address,
859
860 .ndo_change_mtu = eth_change_mtu,
861 .ndo_validate_addr = eth_validate_addr,
862};
863
864static int rtl8150_probe(struct usb_interface *intf,
865 const struct usb_device_id *id)
866{
867 struct usb_device *udev = interface_to_usbdev(intf);
868 rtl8150_t *dev;
869 struct net_device *netdev;
870
871 netdev = alloc_etherdev(sizeof(rtl8150_t));
872 if (!netdev)
873 return -ENOMEM;
874
875 dev = netdev_priv(netdev);
876
877 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
878 if (!dev->intr_buff) {
879 free_netdev(netdev);
880 return -ENOMEM;
881 }
882
883 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
884 spin_lock_init(&dev->rx_pool_lock);
885
886 dev->udev = udev;
887 dev->netdev = netdev;
888 netdev->netdev_ops = &rtl8150_netdev_ops;
889 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
890 SET_ETHTOOL_OPS(netdev, &ops);
891 dev->intr_interval = 100; /* 100ms */
892
893 if (!alloc_all_urbs(dev)) {
894 dev_err(&intf->dev, "out of memory\n");
895 goto out;
896 }
897 if (!rtl8150_reset(dev)) {
898 dev_err(&intf->dev, "couldn't reset the device\n");
899 goto out1;
900 }
901 fill_skb_pool(dev);
902 set_ethernet_addr(dev);
903
904 usb_set_intfdata(intf, dev);
905 SET_NETDEV_DEV(netdev, &intf->dev);
906 if (register_netdev(netdev) != 0) {
907 dev_err(&intf->dev, "couldn't register the device\n");
908 goto out2;
909 }
910
911 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
912
913 return 0;
914
915out2:
916 usb_set_intfdata(intf, NULL);
917 free_skb_pool(dev);
918out1:
919 free_all_urbs(dev);
920out:
921 kfree(dev->intr_buff);
922 free_netdev(netdev);
923 return -EIO;
924}
925
926static void rtl8150_disconnect(struct usb_interface *intf)
927{
928 rtl8150_t *dev = usb_get_intfdata(intf);
929
930 usb_set_intfdata(intf, NULL);
931 if (dev) {
932 set_bit(RTL8150_UNPLUG, &dev->flags);
933 tasklet_kill(&dev->tl);
934 unregister_netdev(dev->netdev);
935 unlink_all_urbs(dev);
936 free_all_urbs(dev);
937 free_skb_pool(dev);
938 if (dev->rx_skb)
939 dev_kfree_skb(dev->rx_skb);
940 kfree(dev->intr_buff);
941 free_netdev(dev->netdev);
942 }
943}
944
945static struct usb_driver rtl8150_driver = {
946 .name = driver_name,
947 .probe = rtl8150_probe,
948 .disconnect = rtl8150_disconnect,
949 .id_table = rtl8150_table,
950 .suspend = rtl8150_suspend,
951 .resume = rtl8150_resume,
952 .disable_hub_initiated_lpm = 1,
953};
954
955module_usb_driver(rtl8150_driver);
956
957MODULE_AUTHOR(DRIVER_AUTHOR);
958MODULE_DESCRIPTION(DRIVER_DESC);
959MODULE_LICENSE("GPL");