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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
4 */
5
6#include <linux/signal.h>
7#include <linux/slab.h>
8#include <linux/module.h>
9#include <linux/netdevice.h>
10#include <linux/etherdevice.h>
11#include <linux/mii.h>
12#include <linux/ethtool.h>
13#include <linux/usb.h>
14#include <linux/uaccess.h>
15
16/* Version Information */
17#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
18#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
19#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
20
21#define IDR 0x0120
22#define MAR 0x0126
23#define CR 0x012e
24#define TCR 0x012f
25#define RCR 0x0130
26#define TSR 0x0132
27#define RSR 0x0133
28#define CON0 0x0135
29#define CON1 0x0136
30#define MSR 0x0137
31#define PHYADD 0x0138
32#define PHYDAT 0x0139
33#define PHYCNT 0x013b
34#define GPPC 0x013d
35#define BMCR 0x0140
36#define BMSR 0x0142
37#define ANAR 0x0144
38#define ANLP 0x0146
39#define AER 0x0148
40#define CSCR 0x014C /* This one has the link status */
41#define CSCR_LINK_STATUS (1 << 3)
42
43#define IDR_EEPROM 0x1202
44
45#define PHY_READ 0
46#define PHY_WRITE 0x20
47#define PHY_GO 0x40
48
49#define MII_TIMEOUT 10
50#define INTBUFSIZE 8
51
52#define RTL8150_REQT_READ 0xc0
53#define RTL8150_REQT_WRITE 0x40
54#define RTL8150_REQ_GET_REGS 0x05
55#define RTL8150_REQ_SET_REGS 0x05
56
57
58/* Transmit status register errors */
59#define TSR_ECOL (1<<5)
60#define TSR_LCOL (1<<4)
61#define TSR_LOSS_CRS (1<<3)
62#define TSR_JBR (1<<2)
63#define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
64/* Receive status register errors */
65#define RSR_CRC (1<<2)
66#define RSR_FAE (1<<1)
67#define RSR_ERRORS (RSR_CRC | RSR_FAE)
68
69/* Media status register definitions */
70#define MSR_DUPLEX (1<<4)
71#define MSR_SPEED (1<<3)
72#define MSR_LINK (1<<2)
73
74/* Interrupt pipe data */
75#define INT_TSR 0x00
76#define INT_RSR 0x01
77#define INT_MSR 0x02
78#define INT_WAKSR 0x03
79#define INT_TXOK_CNT 0x04
80#define INT_RXLOST_CNT 0x05
81#define INT_CRERR_CNT 0x06
82#define INT_COL_CNT 0x07
83
84
85#define RTL8150_MTU 1540
86#define RTL8150_TX_TIMEOUT (HZ)
87#define RX_SKB_POOL_SIZE 4
88
89/* rtl8150 flags */
90#define RTL8150_HW_CRC 0
91#define RX_REG_SET 1
92#define RTL8150_UNPLUG 2
93#define RX_URB_FAIL 3
94
95/* Define these values to match your device */
96#define VENDOR_ID_REALTEK 0x0bda
97#define VENDOR_ID_MELCO 0x0411
98#define VENDOR_ID_MICRONET 0x3980
99#define VENDOR_ID_LONGSHINE 0x07b8
100#define VENDOR_ID_OQO 0x1557
101#define VENDOR_ID_ZYXEL 0x0586
102
103#define PRODUCT_ID_RTL8150 0x8150
104#define PRODUCT_ID_LUAKTX 0x0012
105#define PRODUCT_ID_LCS8138TX 0x401a
106#define PRODUCT_ID_SP128AR 0x0003
107#define PRODUCT_ID_PRESTIGE 0x401a
108
109#undef EEPROM_WRITE
110
111/* table of devices that work with this driver */
112static const struct usb_device_id rtl8150_table[] = {
113 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
114 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
115 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
116 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
117 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
118 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
119 {}
120};
121
122MODULE_DEVICE_TABLE(usb, rtl8150_table);
123
124struct rtl8150 {
125 unsigned long flags;
126 struct usb_device *udev;
127 struct tasklet_struct tl;
128 struct net_device *netdev;
129 struct urb *rx_urb, *tx_urb, *intr_urb;
130 struct sk_buff *tx_skb, *rx_skb;
131 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
132 spinlock_t rx_pool_lock;
133 struct usb_ctrlrequest dr;
134 int intr_interval;
135 u8 *intr_buff;
136 u8 phy;
137};
138
139typedef struct rtl8150 rtl8150_t;
140
141struct async_req {
142 struct usb_ctrlrequest dr;
143 u16 rx_creg;
144};
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 void *buf;
156 int ret;
157
158 buf = kmalloc(size, GFP_NOIO);
159 if (!buf)
160 return -ENOMEM;
161
162 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
163 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
164 indx, 0, buf, size, 500);
165 if (ret > 0 && ret <= size)
166 memcpy(data, buf, ret);
167 kfree(buf);
168 return ret;
169}
170
171static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
172{
173 void *buf;
174 int ret;
175
176 buf = kmemdup(data, size, GFP_NOIO);
177 if (!buf)
178 return -ENOMEM;
179
180 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
181 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
182 indx, 0, buf, size, 500);
183 kfree(buf);
184 return ret;
185}
186
187static void async_set_reg_cb(struct urb *urb)
188{
189 struct async_req *req = (struct async_req *)urb->context;
190 int status = urb->status;
191
192 if (status < 0)
193 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
194 kfree(req);
195 usb_free_urb(urb);
196}
197
198static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
199{
200 int res = -ENOMEM;
201 struct urb *async_urb;
202 struct async_req *req;
203
204 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
205 if (req == NULL)
206 return res;
207 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
208 if (async_urb == NULL) {
209 kfree(req);
210 return res;
211 }
212 req->rx_creg = cpu_to_le16(reg);
213 req->dr.bRequestType = RTL8150_REQT_WRITE;
214 req->dr.bRequest = RTL8150_REQ_SET_REGS;
215 req->dr.wIndex = 0;
216 req->dr.wValue = cpu_to_le16(indx);
217 req->dr.wLength = cpu_to_le16(size);
218 usb_fill_control_urb(async_urb, dev->udev,
219 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
220 &req->rx_creg, size, async_set_reg_cb, req);
221 res = usb_submit_urb(async_urb, GFP_ATOMIC);
222 if (res) {
223 if (res == -ENODEV)
224 netif_device_detach(dev->netdev);
225 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
226 }
227 return res;
228}
229
230static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
231{
232 int i;
233 u8 data[3], tmp;
234
235 data[0] = phy;
236 data[1] = data[2] = 0;
237 tmp = indx | PHY_READ | PHY_GO;
238 i = 0;
239
240 set_registers(dev, PHYADD, sizeof(data), data);
241 set_registers(dev, PHYCNT, 1, &tmp);
242 do {
243 get_registers(dev, PHYCNT, 1, data);
244 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
245
246 if (i <= MII_TIMEOUT) {
247 get_registers(dev, PHYDAT, 2, data);
248 *reg = data[0] | (data[1] << 8);
249 return 0;
250 } else
251 return 1;
252}
253
254static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
255{
256 int i;
257 u8 data[3], tmp;
258
259 data[0] = phy;
260 data[1] = reg & 0xff;
261 data[2] = (reg >> 8) & 0xff;
262 tmp = indx | PHY_WRITE | PHY_GO;
263 i = 0;
264
265 set_registers(dev, PHYADD, sizeof(data), data);
266 set_registers(dev, PHYCNT, 1, &tmp);
267 do {
268 get_registers(dev, PHYCNT, 1, data);
269 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
270
271 if (i <= MII_TIMEOUT)
272 return 0;
273 else
274 return 1;
275}
276
277static void set_ethernet_addr(rtl8150_t *dev)
278{
279 u8 node_id[ETH_ALEN];
280 int ret;
281
282 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
283
284 if (ret == sizeof(node_id)) {
285 ether_addr_copy(dev->netdev->dev_addr, node_id);
286 } else {
287 eth_hw_addr_random(dev->netdev);
288 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
289 dev->netdev->dev_addr);
290 }
291}
292
293static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
294{
295 struct sockaddr *addr = p;
296 rtl8150_t *dev = netdev_priv(netdev);
297
298 if (netif_running(netdev))
299 return -EBUSY;
300
301 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
302 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
303 /* Set the IDR registers. */
304 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
305#ifdef EEPROM_WRITE
306 {
307 int i;
308 u8 cr;
309 /* Get the CR contents. */
310 get_registers(dev, CR, 1, &cr);
311 /* Set the WEPROM bit (eeprom write enable). */
312 cr |= 0x20;
313 set_registers(dev, CR, 1, &cr);
314 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
315 so we need to split them up. */
316 for (i = 0; i * 2 < netdev->addr_len; i++) {
317 set_registers(dev, IDR_EEPROM + (i * 2), 2,
318 netdev->dev_addr + (i * 2));
319 }
320 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
321 cr &= 0xdf;
322 set_registers(dev, CR, 1, &cr);
323 }
324#endif
325 return 0;
326}
327
328static int rtl8150_reset(rtl8150_t * dev)
329{
330 u8 data = 0x10;
331 int i = HZ;
332
333 set_registers(dev, CR, 1, &data);
334 do {
335 get_registers(dev, CR, 1, &data);
336 } while ((data & 0x10) && --i);
337
338 return (i > 0) ? 1 : 0;
339}
340
341static int alloc_all_urbs(rtl8150_t * dev)
342{
343 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
344 if (!dev->rx_urb)
345 return 0;
346 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
347 if (!dev->tx_urb) {
348 usb_free_urb(dev->rx_urb);
349 return 0;
350 }
351 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
352 if (!dev->intr_urb) {
353 usb_free_urb(dev->rx_urb);
354 usb_free_urb(dev->tx_urb);
355 return 0;
356 }
357
358 return 1;
359}
360
361static void free_all_urbs(rtl8150_t * dev)
362{
363 usb_free_urb(dev->rx_urb);
364 usb_free_urb(dev->tx_urb);
365 usb_free_urb(dev->intr_urb);
366}
367
368static void unlink_all_urbs(rtl8150_t * dev)
369{
370 usb_kill_urb(dev->rx_urb);
371 usb_kill_urb(dev->tx_urb);
372 usb_kill_urb(dev->intr_urb);
373}
374
375static inline struct sk_buff *pull_skb(rtl8150_t *dev)
376{
377 struct sk_buff *skb;
378 int i;
379
380 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
381 if (dev->rx_skb_pool[i]) {
382 skb = dev->rx_skb_pool[i];
383 dev->rx_skb_pool[i] = NULL;
384 return skb;
385 }
386 }
387 return NULL;
388}
389
390static void read_bulk_callback(struct urb *urb)
391{
392 rtl8150_t *dev;
393 unsigned pkt_len, res;
394 struct sk_buff *skb;
395 struct net_device *netdev;
396 int status = urb->status;
397 int result;
398 unsigned long flags;
399
400 dev = urb->context;
401 if (!dev)
402 return;
403 if (test_bit(RTL8150_UNPLUG, &dev->flags))
404 return;
405 netdev = dev->netdev;
406 if (!netif_device_present(netdev))
407 return;
408
409 switch (status) {
410 case 0:
411 break;
412 case -ENOENT:
413 return; /* the urb is in unlink state */
414 case -ETIME:
415 if (printk_ratelimit())
416 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
417 goto goon;
418 default:
419 if (printk_ratelimit())
420 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
421 goto goon;
422 }
423
424 if (!dev->rx_skb)
425 goto resched;
426 /* protect against short packets (tell me why we got some?!?) */
427 if (urb->actual_length < 4)
428 goto goon;
429
430 res = urb->actual_length;
431 pkt_len = res - 4;
432
433 skb_put(dev->rx_skb, pkt_len);
434 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
435 netif_rx(dev->rx_skb);
436 netdev->stats.rx_packets++;
437 netdev->stats.rx_bytes += pkt_len;
438
439 spin_lock_irqsave(&dev->rx_pool_lock, flags);
440 skb = pull_skb(dev);
441 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
442 if (!skb)
443 goto resched;
444
445 dev->rx_skb = skb;
446goon:
447 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
448 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
449 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
450 if (result == -ENODEV)
451 netif_device_detach(dev->netdev);
452 else if (result) {
453 set_bit(RX_URB_FAIL, &dev->flags);
454 goto resched;
455 } else {
456 clear_bit(RX_URB_FAIL, &dev->flags);
457 }
458
459 return;
460resched:
461 tasklet_schedule(&dev->tl);
462}
463
464static void write_bulk_callback(struct urb *urb)
465{
466 rtl8150_t *dev;
467 int status = urb->status;
468
469 dev = urb->context;
470 if (!dev)
471 return;
472 dev_kfree_skb_irq(dev->tx_skb);
473 if (!netif_device_present(dev->netdev))
474 return;
475 if (status)
476 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
477 dev->netdev->name, status);
478 netif_trans_update(dev->netdev);
479 netif_wake_queue(dev->netdev);
480}
481
482static void intr_callback(struct urb *urb)
483{
484 rtl8150_t *dev;
485 __u8 *d;
486 int status = urb->status;
487 int res;
488
489 dev = urb->context;
490 if (!dev)
491 return;
492 switch (status) {
493 case 0: /* success */
494 break;
495 case -ECONNRESET: /* unlink */
496 case -ENOENT:
497 case -ESHUTDOWN:
498 return;
499 /* -EPIPE: should clear the halt */
500 default:
501 dev_info(&urb->dev->dev, "%s: intr status %d\n",
502 dev->netdev->name, status);
503 goto resubmit;
504 }
505
506 d = urb->transfer_buffer;
507 if (d[0] & TSR_ERRORS) {
508 dev->netdev->stats.tx_errors++;
509 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
510 dev->netdev->stats.tx_aborted_errors++;
511 if (d[INT_TSR] & TSR_LCOL)
512 dev->netdev->stats.tx_window_errors++;
513 if (d[INT_TSR] & TSR_LOSS_CRS)
514 dev->netdev->stats.tx_carrier_errors++;
515 }
516 /* Report link status changes to the network stack */
517 if ((d[INT_MSR] & MSR_LINK) == 0) {
518 if (netif_carrier_ok(dev->netdev)) {
519 netif_carrier_off(dev->netdev);
520 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
521 }
522 } else {
523 if (!netif_carrier_ok(dev->netdev)) {
524 netif_carrier_on(dev->netdev);
525 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
526 }
527 }
528
529resubmit:
530 res = usb_submit_urb (urb, GFP_ATOMIC);
531 if (res == -ENODEV)
532 netif_device_detach(dev->netdev);
533 else if (res)
534 dev_err(&dev->udev->dev,
535 "can't resubmit intr, %s-%s/input0, status %d\n",
536 dev->udev->bus->bus_name, dev->udev->devpath, res);
537}
538
539static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
540{
541 rtl8150_t *dev = usb_get_intfdata(intf);
542
543 netif_device_detach(dev->netdev);
544
545 if (netif_running(dev->netdev)) {
546 usb_kill_urb(dev->rx_urb);
547 usb_kill_urb(dev->intr_urb);
548 }
549 return 0;
550}
551
552static int rtl8150_resume(struct usb_interface *intf)
553{
554 rtl8150_t *dev = usb_get_intfdata(intf);
555
556 netif_device_attach(dev->netdev);
557 if (netif_running(dev->netdev)) {
558 dev->rx_urb->status = 0;
559 dev->rx_urb->actual_length = 0;
560 read_bulk_callback(dev->rx_urb);
561
562 dev->intr_urb->status = 0;
563 dev->intr_urb->actual_length = 0;
564 intr_callback(dev->intr_urb);
565 }
566 return 0;
567}
568
569/*
570**
571** network related part of the code
572**
573*/
574
575static void fill_skb_pool(rtl8150_t *dev)
576{
577 struct sk_buff *skb;
578 int i;
579
580 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
581 if (dev->rx_skb_pool[i])
582 continue;
583 skb = dev_alloc_skb(RTL8150_MTU + 2);
584 if (!skb) {
585 return;
586 }
587 skb_reserve(skb, 2);
588 dev->rx_skb_pool[i] = skb;
589 }
590}
591
592static void free_skb_pool(rtl8150_t *dev)
593{
594 int i;
595
596 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
597 dev_kfree_skb(dev->rx_skb_pool[i]);
598}
599
600static void rx_fixup(unsigned long data)
601{
602 struct rtl8150 *dev = (struct rtl8150 *)data;
603 struct sk_buff *skb;
604 int status;
605
606 spin_lock_irq(&dev->rx_pool_lock);
607 fill_skb_pool(dev);
608 spin_unlock_irq(&dev->rx_pool_lock);
609 if (test_bit(RX_URB_FAIL, &dev->flags))
610 if (dev->rx_skb)
611 goto try_again;
612 spin_lock_irq(&dev->rx_pool_lock);
613 skb = pull_skb(dev);
614 spin_unlock_irq(&dev->rx_pool_lock);
615 if (skb == NULL)
616 goto tlsched;
617 dev->rx_skb = skb;
618 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
619 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
620try_again:
621 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
622 if (status == -ENODEV) {
623 netif_device_detach(dev->netdev);
624 } else if (status) {
625 set_bit(RX_URB_FAIL, &dev->flags);
626 goto tlsched;
627 } else {
628 clear_bit(RX_URB_FAIL, &dev->flags);
629 }
630
631 return;
632tlsched:
633 tasklet_schedule(&dev->tl);
634}
635
636static int enable_net_traffic(rtl8150_t * dev)
637{
638 u8 cr, tcr, rcr, msr;
639
640 if (!rtl8150_reset(dev)) {
641 dev_warn(&dev->udev->dev, "device reset failed\n");
642 }
643 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
644 rcr = 0x9e;
645 tcr = 0xd8;
646 cr = 0x0c;
647 if (!(rcr & 0x80))
648 set_bit(RTL8150_HW_CRC, &dev->flags);
649 set_registers(dev, RCR, 1, &rcr);
650 set_registers(dev, TCR, 1, &tcr);
651 set_registers(dev, CR, 1, &cr);
652 get_registers(dev, MSR, 1, &msr);
653
654 return 0;
655}
656
657static void disable_net_traffic(rtl8150_t * dev)
658{
659 u8 cr;
660
661 get_registers(dev, CR, 1, &cr);
662 cr &= 0xf3;
663 set_registers(dev, CR, 1, &cr);
664}
665
666static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
667{
668 rtl8150_t *dev = netdev_priv(netdev);
669 dev_warn(&netdev->dev, "Tx timeout.\n");
670 usb_unlink_urb(dev->tx_urb);
671 netdev->stats.tx_errors++;
672}
673
674static void rtl8150_set_multicast(struct net_device *netdev)
675{
676 rtl8150_t *dev = netdev_priv(netdev);
677 u16 rx_creg = 0x9e;
678
679 netif_stop_queue(netdev);
680 if (netdev->flags & IFF_PROMISC) {
681 rx_creg |= 0x0001;
682 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
683 } else if (!netdev_mc_empty(netdev) ||
684 (netdev->flags & IFF_ALLMULTI)) {
685 rx_creg &= 0xfffe;
686 rx_creg |= 0x0002;
687 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
688 } else {
689 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
690 rx_creg &= 0x00fc;
691 }
692 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
693 netif_wake_queue(netdev);
694}
695
696static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
697 struct net_device *netdev)
698{
699 rtl8150_t *dev = netdev_priv(netdev);
700 int count, res;
701
702 netif_stop_queue(netdev);
703 count = (skb->len < 60) ? 60 : skb->len;
704 count = (count & 0x3f) ? count : count + 1;
705 dev->tx_skb = skb;
706 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
707 skb->data, count, write_bulk_callback, dev);
708 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
709 /* Can we get/handle EPIPE here? */
710 if (res == -ENODEV)
711 netif_device_detach(dev->netdev);
712 else {
713 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
714 netdev->stats.tx_errors++;
715 netif_start_queue(netdev);
716 }
717 } else {
718 netdev->stats.tx_packets++;
719 netdev->stats.tx_bytes += skb->len;
720 netif_trans_update(netdev);
721 }
722
723 return NETDEV_TX_OK;
724}
725
726
727static void set_carrier(struct net_device *netdev)
728{
729 rtl8150_t *dev = netdev_priv(netdev);
730 short tmp;
731
732 get_registers(dev, CSCR, 2, &tmp);
733 if (tmp & CSCR_LINK_STATUS)
734 netif_carrier_on(netdev);
735 else
736 netif_carrier_off(netdev);
737}
738
739static int rtl8150_open(struct net_device *netdev)
740{
741 rtl8150_t *dev = netdev_priv(netdev);
742 int res;
743
744 if (dev->rx_skb == NULL)
745 dev->rx_skb = pull_skb(dev);
746 if (!dev->rx_skb)
747 return -ENOMEM;
748
749 set_registers(dev, IDR, 6, netdev->dev_addr);
750
751 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
752 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
753 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
754 if (res == -ENODEV)
755 netif_device_detach(dev->netdev);
756 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
757 return res;
758 }
759 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
760 dev->intr_buff, INTBUFSIZE, intr_callback,
761 dev, dev->intr_interval);
762 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
763 if (res == -ENODEV)
764 netif_device_detach(dev->netdev);
765 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
766 usb_kill_urb(dev->rx_urb);
767 return res;
768 }
769 enable_net_traffic(dev);
770 set_carrier(netdev);
771 netif_start_queue(netdev);
772
773 return res;
774}
775
776static int rtl8150_close(struct net_device *netdev)
777{
778 rtl8150_t *dev = netdev_priv(netdev);
779
780 netif_stop_queue(netdev);
781 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
782 disable_net_traffic(dev);
783 unlink_all_urbs(dev);
784
785 return 0;
786}
787
788static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
789{
790 rtl8150_t *dev = netdev_priv(netdev);
791
792 strlcpy(info->driver, driver_name, sizeof(info->driver));
793 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
794 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
795}
796
797static int rtl8150_get_link_ksettings(struct net_device *netdev,
798 struct ethtool_link_ksettings *ecmd)
799{
800 rtl8150_t *dev = netdev_priv(netdev);
801 short lpa, bmcr;
802 u32 supported;
803
804 supported = (SUPPORTED_10baseT_Half |
805 SUPPORTED_10baseT_Full |
806 SUPPORTED_100baseT_Half |
807 SUPPORTED_100baseT_Full |
808 SUPPORTED_Autoneg |
809 SUPPORTED_TP | SUPPORTED_MII);
810 ecmd->base.port = PORT_TP;
811 ecmd->base.phy_address = dev->phy;
812 get_registers(dev, BMCR, 2, &bmcr);
813 get_registers(dev, ANLP, 2, &lpa);
814 if (bmcr & BMCR_ANENABLE) {
815 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
816 SPEED_100 : SPEED_10);
817 ecmd->base.speed = speed;
818 ecmd->base.autoneg = AUTONEG_ENABLE;
819 if (speed == SPEED_100)
820 ecmd->base.duplex = (lpa & LPA_100FULL) ?
821 DUPLEX_FULL : DUPLEX_HALF;
822 else
823 ecmd->base.duplex = (lpa & LPA_10FULL) ?
824 DUPLEX_FULL : DUPLEX_HALF;
825 } else {
826 ecmd->base.autoneg = AUTONEG_DISABLE;
827 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
828 SPEED_100 : SPEED_10);
829 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
830 DUPLEX_FULL : DUPLEX_HALF;
831 }
832
833 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
834 supported);
835
836 return 0;
837}
838
839static const struct ethtool_ops ops = {
840 .get_drvinfo = rtl8150_get_drvinfo,
841 .get_link = ethtool_op_get_link,
842 .get_link_ksettings = rtl8150_get_link_ksettings,
843};
844
845static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
846{
847 rtl8150_t *dev = netdev_priv(netdev);
848 u16 *data = (u16 *) & rq->ifr_ifru;
849 int res = 0;
850
851 switch (cmd) {
852 case SIOCDEVPRIVATE:
853 data[0] = dev->phy;
854 fallthrough;
855 case SIOCDEVPRIVATE + 1:
856 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
857 break;
858 case SIOCDEVPRIVATE + 2:
859 if (!capable(CAP_NET_ADMIN))
860 return -EPERM;
861 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
862 break;
863 default:
864 res = -EOPNOTSUPP;
865 }
866
867 return res;
868}
869
870static const struct net_device_ops rtl8150_netdev_ops = {
871 .ndo_open = rtl8150_open,
872 .ndo_stop = rtl8150_close,
873 .ndo_do_ioctl = rtl8150_ioctl,
874 .ndo_start_xmit = rtl8150_start_xmit,
875 .ndo_tx_timeout = rtl8150_tx_timeout,
876 .ndo_set_rx_mode = rtl8150_set_multicast,
877 .ndo_set_mac_address = rtl8150_set_mac_address,
878
879 .ndo_validate_addr = eth_validate_addr,
880};
881
882static int rtl8150_probe(struct usb_interface *intf,
883 const struct usb_device_id *id)
884{
885 struct usb_device *udev = interface_to_usbdev(intf);
886 rtl8150_t *dev;
887 struct net_device *netdev;
888
889 netdev = alloc_etherdev(sizeof(rtl8150_t));
890 if (!netdev)
891 return -ENOMEM;
892
893 dev = netdev_priv(netdev);
894
895 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
896 if (!dev->intr_buff) {
897 free_netdev(netdev);
898 return -ENOMEM;
899 }
900
901 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
902 spin_lock_init(&dev->rx_pool_lock);
903
904 dev->udev = udev;
905 dev->netdev = netdev;
906 netdev->netdev_ops = &rtl8150_netdev_ops;
907 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
908 netdev->ethtool_ops = &ops;
909 dev->intr_interval = 100; /* 100ms */
910
911 if (!alloc_all_urbs(dev)) {
912 dev_err(&intf->dev, "out of memory\n");
913 goto out;
914 }
915 if (!rtl8150_reset(dev)) {
916 dev_err(&intf->dev, "couldn't reset the device\n");
917 goto out1;
918 }
919 fill_skb_pool(dev);
920 set_ethernet_addr(dev);
921
922 usb_set_intfdata(intf, dev);
923 SET_NETDEV_DEV(netdev, &intf->dev);
924 if (register_netdev(netdev) != 0) {
925 dev_err(&intf->dev, "couldn't register the device\n");
926 goto out2;
927 }
928
929 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
930
931 return 0;
932
933out2:
934 usb_set_intfdata(intf, NULL);
935 free_skb_pool(dev);
936out1:
937 free_all_urbs(dev);
938out:
939 kfree(dev->intr_buff);
940 free_netdev(netdev);
941 return -EIO;
942}
943
944static void rtl8150_disconnect(struct usb_interface *intf)
945{
946 rtl8150_t *dev = usb_get_intfdata(intf);
947
948 usb_set_intfdata(intf, NULL);
949 if (dev) {
950 set_bit(RTL8150_UNPLUG, &dev->flags);
951 tasklet_kill(&dev->tl);
952 unregister_netdev(dev->netdev);
953 unlink_all_urbs(dev);
954 free_all_urbs(dev);
955 free_skb_pool(dev);
956 dev_kfree_skb(dev->rx_skb);
957 kfree(dev->intr_buff);
958 free_netdev(dev->netdev);
959 }
960}
961
962static struct usb_driver rtl8150_driver = {
963 .name = driver_name,
964 .probe = rtl8150_probe,
965 .disconnect = rtl8150_disconnect,
966 .id_table = rtl8150_table,
967 .suspend = rtl8150_suspend,
968 .resume = rtl8150_resume,
969 .disable_hub_initiated_lpm = 1,
970};
971
972module_usb_driver(rtl8150_driver);
973
974MODULE_AUTHOR(DRIVER_AUTHOR);
975MODULE_DESCRIPTION(DRIVER_DESC);
976MODULE_LICENSE("GPL");