1 /*
2 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
7 */
8
9 #include <linux/signal.h>
10 #include <linux/slab.h>
11 #include <linux/module.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/mii.h>
15 #include <linux/ethtool.h>
16 #include <linux/usb.h>
17 #include <linux/uaccess.h>
18
19 /* Version Information */
20 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
21 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
23
24 #define IDR 0x0120
25 #define MAR 0x0126
26 #define CR 0x012e
27 #define TCR 0x012f
28 #define RCR 0x0130
29 #define TSR 0x0132
30 #define RSR 0x0133
31 #define CON0 0x0135
32 #define CON1 0x0136
33 #define MSR 0x0137
34 #define PHYADD 0x0138
35 #define PHYDAT 0x0139
36 #define PHYCNT 0x013b
37 #define GPPC 0x013d
38 #define BMCR 0x0140
39 #define BMSR 0x0142
40 #define ANAR 0x0144
41 #define ANLP 0x0146
42 #define AER 0x0148
43 #define CSCR 0x014C /* This one has the link status */
44 #define CSCR_LINK_STATUS (1 << 3)
45
46 #define IDR_EEPROM 0x1202
47
48 #define PHY_READ 0
49 #define PHY_WRITE 0x20
50 #define PHY_GO 0x40
51
52 #define MII_TIMEOUT 10
53 #define INTBUFSIZE 8
54
55 #define RTL8150_REQT_READ 0xc0
56 #define RTL8150_REQT_WRITE 0x40
57 #define RTL8150_REQ_GET_REGS 0x05
58 #define RTL8150_REQ_SET_REGS 0x05
59
60
61 /* Transmit status register errors */
62 #define TSR_ECOL (1<<5)
63 #define TSR_LCOL (1<<4)
64 #define TSR_LOSS_CRS (1<<3)
65 #define TSR_JBR (1<<2)
66 #define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
67 /* Receive status register errors */
68 #define RSR_CRC (1<<2)
69 #define RSR_FAE (1<<1)
70 #define RSR_ERRORS (RSR_CRC | RSR_FAE)
71
72 /* Media status register definitions */
73 #define MSR_DUPLEX (1<<4)
74 #define MSR_SPEED (1<<3)
75 #define MSR_LINK (1<<2)
76
77 /* Interrupt pipe data */
78 #define INT_TSR 0x00
79 #define INT_RSR 0x01
80 #define INT_MSR 0x02
81 #define INT_WAKSR 0x03
82 #define INT_TXOK_CNT 0x04
83 #define INT_RXLOST_CNT 0x05
84 #define INT_CRERR_CNT 0x06
85 #define INT_COL_CNT 0x07
86
87
88 #define RTL8150_MTU 1540
89 #define RTL8150_TX_TIMEOUT (HZ)
90 #define RX_SKB_POOL_SIZE 4
91
92 /* rtl8150 flags */
93 #define RTL8150_HW_CRC 0
94 #define RX_REG_SET 1
95 #define RTL8150_UNPLUG 2
96 #define RX_URB_FAIL 3
97
98 /* Define these values to match your device */
99 #define VENDOR_ID_REALTEK 0x0bda
100 #define VENDOR_ID_MELCO 0x0411
101 #define VENDOR_ID_MICRONET 0x3980
102 #define VENDOR_ID_LONGSHINE 0x07b8
103 #define VENDOR_ID_OQO 0x1557
104 #define VENDOR_ID_ZYXEL 0x0586
105
106 #define PRODUCT_ID_RTL8150 0x8150
107 #define PRODUCT_ID_LUAKTX 0x0012
108 #define PRODUCT_ID_LCS8138TX 0x401a
109 #define PRODUCT_ID_SP128AR 0x0003
110 #define PRODUCT_ID_PRESTIGE 0x401a
111
112 #undef EEPROM_WRITE
113
114 /* table of devices that work with this driver */
115 static const struct usb_device_id rtl8150_table[] = {
116 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
117 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
118 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
119 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
120 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
121 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
122 {}
123 };
124
125 MODULE_DEVICE_TABLE(usb, rtl8150_table);
126
127 struct rtl8150 {
128 unsigned long flags;
129 struct usb_device *udev;
130 struct tasklet_struct tl;
131 struct net_device *netdev;
132 struct urb *rx_urb, *tx_urb, *intr_urb;
133 struct sk_buff *tx_skb, *rx_skb;
134 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
135 spinlock_t rx_pool_lock;
136 struct usb_ctrlrequest dr;
137 int intr_interval;
138 u8 *intr_buff;
139 u8 phy;
140 };
141
142 typedef struct rtl8150 rtl8150_t;
143
144 struct async_req {
145 struct usb_ctrlrequest dr;
146 u16 rx_creg;
147 };
148
149 static const char driver_name [] = "rtl8150";
150
151 /*
152 **
153 ** device related part of the code
154 **
155 */
get_registers(rtl8150_t * dev,u16 indx,u16 size,void * data)156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
157 {
158 void *buf;
159 int ret;
160
161 buf = kmalloc(size, GFP_NOIO);
162 if (!buf)
163 return -ENOMEM;
164
165 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
166 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
167 indx, 0, buf, size, 500);
168 if (ret > 0 && ret <= size)
169 memcpy(data, buf, ret);
170 kfree(buf);
171 return ret;
172 }
173
set_registers(rtl8150_t * dev,u16 indx,u16 size,const void * data)174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
175 {
176 void *buf;
177 int ret;
178
179 buf = kmemdup(data, size, GFP_NOIO);
180 if (!buf)
181 return -ENOMEM;
182
183 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
184 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
185 indx, 0, buf, size, 500);
186 kfree(buf);
187 return ret;
188 }
189
async_set_reg_cb(struct urb * urb)190 static void async_set_reg_cb(struct urb *urb)
191 {
192 struct async_req *req = (struct async_req *)urb->context;
193 int status = urb->status;
194
195 if (status < 0)
196 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
197 kfree(req);
198 usb_free_urb(urb);
199 }
200
async_set_registers(rtl8150_t * dev,u16 indx,u16 size,u16 reg)201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
202 {
203 int res = -ENOMEM;
204 struct urb *async_urb;
205 struct async_req *req;
206
207 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
208 if (req == NULL)
209 return res;
210 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
211 if (async_urb == NULL) {
212 kfree(req);
213 return res;
214 }
215 req->rx_creg = cpu_to_le16(reg);
216 req->dr.bRequestType = RTL8150_REQT_WRITE;
217 req->dr.bRequest = RTL8150_REQ_SET_REGS;
218 req->dr.wIndex = 0;
219 req->dr.wValue = cpu_to_le16(indx);
220 req->dr.wLength = cpu_to_le16(size);
221 usb_fill_control_urb(async_urb, dev->udev,
222 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
223 &req->rx_creg, size, async_set_reg_cb, req);
224 res = usb_submit_urb(async_urb, GFP_ATOMIC);
225 if (res) {
226 if (res == -ENODEV)
227 netif_device_detach(dev->netdev);
228 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
229 }
230 return res;
231 }
232
read_mii_word(rtl8150_t * dev,u8 phy,__u8 indx,u16 * reg)233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
234 {
235 int i;
236 u8 data[3], tmp;
237
238 data[0] = phy;
239 data[1] = data[2] = 0;
240 tmp = indx | PHY_READ | PHY_GO;
241 i = 0;
242
243 set_registers(dev, PHYADD, sizeof(data), data);
244 set_registers(dev, PHYCNT, 1, &tmp);
245 do {
246 get_registers(dev, PHYCNT, 1, data);
247 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
248
249 if (i <= MII_TIMEOUT) {
250 get_registers(dev, PHYDAT, 2, data);
251 *reg = data[0] | (data[1] << 8);
252 return 0;
253 } else
254 return 1;
255 }
256
write_mii_word(rtl8150_t * dev,u8 phy,__u8 indx,u16 reg)257 static int write_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] = reg & 0xff;
264 data[2] = (reg >> 8) & 0xff;
265 tmp = indx | PHY_WRITE | PHY_GO;
266 i = 0;
267
268 set_registers(dev, PHYADD, sizeof(data), data);
269 set_registers(dev, PHYCNT, 1, &tmp);
270 do {
271 get_registers(dev, PHYCNT, 1, data);
272 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
273
274 if (i <= MII_TIMEOUT)
275 return 0;
276 else
277 return 1;
278 }
279
set_ethernet_addr(rtl8150_t * dev)280 static inline void set_ethernet_addr(rtl8150_t * dev)
281 {
282 u8 node_id[6];
283
284 get_registers(dev, IDR, sizeof(node_id), node_id);
285 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
286 }
287
rtl8150_set_mac_address(struct net_device * netdev,void * p)288 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
289 {
290 struct sockaddr *addr = p;
291 rtl8150_t *dev = netdev_priv(netdev);
292
293 if (netif_running(netdev))
294 return -EBUSY;
295
296 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
297 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
298 /* Set the IDR registers. */
299 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
300 #ifdef EEPROM_WRITE
301 {
302 int i;
303 u8 cr;
304 /* Get the CR contents. */
305 get_registers(dev, CR, 1, &cr);
306 /* Set the WEPROM bit (eeprom write enable). */
307 cr |= 0x20;
308 set_registers(dev, CR, 1, &cr);
309 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
310 so we need to split them up. */
311 for (i = 0; i * 2 < netdev->addr_len; i++) {
312 set_registers(dev, IDR_EEPROM + (i * 2), 2,
313 netdev->dev_addr + (i * 2));
314 }
315 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
316 cr &= 0xdf;
317 set_registers(dev, CR, 1, &cr);
318 }
319 #endif
320 return 0;
321 }
322
rtl8150_reset(rtl8150_t * dev)323 static int rtl8150_reset(rtl8150_t * dev)
324 {
325 u8 data = 0x10;
326 int i = HZ;
327
328 set_registers(dev, CR, 1, &data);
329 do {
330 get_registers(dev, CR, 1, &data);
331 } while ((data & 0x10) && --i);
332
333 return (i > 0) ? 1 : 0;
334 }
335
alloc_all_urbs(rtl8150_t * dev)336 static int alloc_all_urbs(rtl8150_t * dev)
337 {
338 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
339 if (!dev->rx_urb)
340 return 0;
341 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
342 if (!dev->tx_urb) {
343 usb_free_urb(dev->rx_urb);
344 return 0;
345 }
346 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
347 if (!dev->intr_urb) {
348 usb_free_urb(dev->rx_urb);
349 usb_free_urb(dev->tx_urb);
350 return 0;
351 }
352
353 return 1;
354 }
355
free_all_urbs(rtl8150_t * dev)356 static void free_all_urbs(rtl8150_t * dev)
357 {
358 usb_free_urb(dev->rx_urb);
359 usb_free_urb(dev->tx_urb);
360 usb_free_urb(dev->intr_urb);
361 }
362
unlink_all_urbs(rtl8150_t * dev)363 static void unlink_all_urbs(rtl8150_t * dev)
364 {
365 usb_kill_urb(dev->rx_urb);
366 usb_kill_urb(dev->tx_urb);
367 usb_kill_urb(dev->intr_urb);
368 }
369
pull_skb(rtl8150_t * dev)370 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
371 {
372 struct sk_buff *skb;
373 int i;
374
375 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
376 if (dev->rx_skb_pool[i]) {
377 skb = dev->rx_skb_pool[i];
378 dev->rx_skb_pool[i] = NULL;
379 return skb;
380 }
381 }
382 return NULL;
383 }
384
read_bulk_callback(struct urb * urb)385 static void read_bulk_callback(struct urb *urb)
386 {
387 rtl8150_t *dev;
388 unsigned pkt_len, res;
389 struct sk_buff *skb;
390 struct net_device *netdev;
391 u16 rx_stat;
392 int status = urb->status;
393 int result;
394 unsigned long flags;
395
396 dev = urb->context;
397 if (!dev)
398 return;
399 if (test_bit(RTL8150_UNPLUG, &dev->flags))
400 return;
401 netdev = dev->netdev;
402 if (!netif_device_present(netdev))
403 return;
404
405 switch (status) {
406 case 0:
407 break;
408 case -ENOENT:
409 return; /* the urb is in unlink state */
410 case -ETIME:
411 if (printk_ratelimit())
412 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
413 goto goon;
414 default:
415 if (printk_ratelimit())
416 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
417 goto goon;
418 }
419
420 if (!dev->rx_skb)
421 goto resched;
422 /* protect against short packets (tell me why we got some?!?) */
423 if (urb->actual_length < 4)
424 goto goon;
425
426 res = urb->actual_length;
427 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
428 pkt_len = res - 4;
429
430 skb_put(dev->rx_skb, pkt_len);
431 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
432 netif_rx(dev->rx_skb);
433 netdev->stats.rx_packets++;
434 netdev->stats.rx_bytes += pkt_len;
435
436 spin_lock_irqsave(&dev->rx_pool_lock, flags);
437 skb = pull_skb(dev);
438 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
439 if (!skb)
440 goto resched;
441
442 dev->rx_skb = skb;
443 goon:
444 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
445 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
446 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
447 if (result == -ENODEV)
448 netif_device_detach(dev->netdev);
449 else if (result) {
450 set_bit(RX_URB_FAIL, &dev->flags);
451 goto resched;
452 } else {
453 clear_bit(RX_URB_FAIL, &dev->flags);
454 }
455
456 return;
457 resched:
458 tasklet_schedule(&dev->tl);
459 }
460
write_bulk_callback(struct urb * urb)461 static void write_bulk_callback(struct urb *urb)
462 {
463 rtl8150_t *dev;
464 int status = urb->status;
465
466 dev = urb->context;
467 if (!dev)
468 return;
469 dev_kfree_skb_irq(dev->tx_skb);
470 if (!netif_device_present(dev->netdev))
471 return;
472 if (status)
473 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
474 dev->netdev->name, status);
475 netif_trans_update(dev->netdev);
476 netif_wake_queue(dev->netdev);
477 }
478
intr_callback(struct urb * urb)479 static void intr_callback(struct urb *urb)
480 {
481 rtl8150_t *dev;
482 __u8 *d;
483 int status = urb->status;
484 int res;
485
486 dev = urb->context;
487 if (!dev)
488 return;
489 switch (status) {
490 case 0: /* success */
491 break;
492 case -ECONNRESET: /* unlink */
493 case -ENOENT:
494 case -ESHUTDOWN:
495 return;
496 /* -EPIPE: should clear the halt */
497 default:
498 dev_info(&urb->dev->dev, "%s: intr status %d\n",
499 dev->netdev->name, status);
500 goto resubmit;
501 }
502
503 d = urb->transfer_buffer;
504 if (d[0] & TSR_ERRORS) {
505 dev->netdev->stats.tx_errors++;
506 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
507 dev->netdev->stats.tx_aborted_errors++;
508 if (d[INT_TSR] & TSR_LCOL)
509 dev->netdev->stats.tx_window_errors++;
510 if (d[INT_TSR] & TSR_LOSS_CRS)
511 dev->netdev->stats.tx_carrier_errors++;
512 }
513 /* Report link status changes to the network stack */
514 if ((d[INT_MSR] & MSR_LINK) == 0) {
515 if (netif_carrier_ok(dev->netdev)) {
516 netif_carrier_off(dev->netdev);
517 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
518 }
519 } else {
520 if (!netif_carrier_ok(dev->netdev)) {
521 netif_carrier_on(dev->netdev);
522 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
523 }
524 }
525
526 resubmit:
527 res = usb_submit_urb (urb, GFP_ATOMIC);
528 if (res == -ENODEV)
529 netif_device_detach(dev->netdev);
530 else if (res)
531 dev_err(&dev->udev->dev,
532 "can't resubmit intr, %s-%s/input0, status %d\n",
533 dev->udev->bus->bus_name, dev->udev->devpath, res);
534 }
535
rtl8150_suspend(struct usb_interface * intf,pm_message_t message)536 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
537 {
538 rtl8150_t *dev = usb_get_intfdata(intf);
539
540 netif_device_detach(dev->netdev);
541
542 if (netif_running(dev->netdev)) {
543 usb_kill_urb(dev->rx_urb);
544 usb_kill_urb(dev->intr_urb);
545 }
546 return 0;
547 }
548
rtl8150_resume(struct usb_interface * intf)549 static int rtl8150_resume(struct usb_interface *intf)
550 {
551 rtl8150_t *dev = usb_get_intfdata(intf);
552
553 netif_device_attach(dev->netdev);
554 if (netif_running(dev->netdev)) {
555 dev->rx_urb->status = 0;
556 dev->rx_urb->actual_length = 0;
557 read_bulk_callback(dev->rx_urb);
558
559 dev->intr_urb->status = 0;
560 dev->intr_urb->actual_length = 0;
561 intr_callback(dev->intr_urb);
562 }
563 return 0;
564 }
565
566 /*
567 **
568 ** network related part of the code
569 **
570 */
571
fill_skb_pool(rtl8150_t * dev)572 static void fill_skb_pool(rtl8150_t *dev)
573 {
574 struct sk_buff *skb;
575 int i;
576
577 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
578 if (dev->rx_skb_pool[i])
579 continue;
580 skb = dev_alloc_skb(RTL8150_MTU + 2);
581 if (!skb) {
582 return;
583 }
584 skb_reserve(skb, 2);
585 dev->rx_skb_pool[i] = skb;
586 }
587 }
588
free_skb_pool(rtl8150_t * dev)589 static void free_skb_pool(rtl8150_t *dev)
590 {
591 int i;
592
593 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
594 if (dev->rx_skb_pool[i])
595 dev_kfree_skb(dev->rx_skb_pool[i]);
596 }
597
rx_fixup(unsigned long data)598 static void rx_fixup(unsigned long data)
599 {
600 struct rtl8150 *dev = (struct rtl8150 *)data;
601 struct sk_buff *skb;
602 int status;
603
604 spin_lock_irq(&dev->rx_pool_lock);
605 fill_skb_pool(dev);
606 spin_unlock_irq(&dev->rx_pool_lock);
607 if (test_bit(RX_URB_FAIL, &dev->flags))
608 if (dev->rx_skb)
609 goto try_again;
610 spin_lock_irq(&dev->rx_pool_lock);
611 skb = pull_skb(dev);
612 spin_unlock_irq(&dev->rx_pool_lock);
613 if (skb == NULL)
614 goto tlsched;
615 dev->rx_skb = skb;
616 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
617 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
618 try_again:
619 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
620 if (status == -ENODEV) {
621 netif_device_detach(dev->netdev);
622 } else if (status) {
623 set_bit(RX_URB_FAIL, &dev->flags);
624 goto tlsched;
625 } else {
626 clear_bit(RX_URB_FAIL, &dev->flags);
627 }
628
629 return;
630 tlsched:
631 tasklet_schedule(&dev->tl);
632 }
633
enable_net_traffic(rtl8150_t * dev)634 static int enable_net_traffic(rtl8150_t * dev)
635 {
636 u8 cr, tcr, rcr, msr;
637
638 if (!rtl8150_reset(dev)) {
639 dev_warn(&dev->udev->dev, "device reset failed\n");
640 }
641 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
642 rcr = 0x9e;
643 tcr = 0xd8;
644 cr = 0x0c;
645 if (!(rcr & 0x80))
646 set_bit(RTL8150_HW_CRC, &dev->flags);
647 set_registers(dev, RCR, 1, &rcr);
648 set_registers(dev, TCR, 1, &tcr);
649 set_registers(dev, CR, 1, &cr);
650 get_registers(dev, MSR, 1, &msr);
651
652 return 0;
653 }
654
disable_net_traffic(rtl8150_t * dev)655 static void disable_net_traffic(rtl8150_t * dev)
656 {
657 u8 cr;
658
659 get_registers(dev, CR, 1, &cr);
660 cr &= 0xf3;
661 set_registers(dev, CR, 1, &cr);
662 }
663
rtl8150_tx_timeout(struct net_device * netdev)664 static void rtl8150_tx_timeout(struct net_device *netdev)
665 {
666 rtl8150_t *dev = netdev_priv(netdev);
667 dev_warn(&netdev->dev, "Tx timeout.\n");
668 usb_unlink_urb(dev->tx_urb);
669 netdev->stats.tx_errors++;
670 }
671
rtl8150_set_multicast(struct net_device * netdev)672 static void rtl8150_set_multicast(struct net_device *netdev)
673 {
674 rtl8150_t *dev = netdev_priv(netdev);
675 u16 rx_creg = 0x9e;
676
677 netif_stop_queue(netdev);
678 if (netdev->flags & IFF_PROMISC) {
679 rx_creg |= 0x0001;
680 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
681 } else if (!netdev_mc_empty(netdev) ||
682 (netdev->flags & IFF_ALLMULTI)) {
683 rx_creg &= 0xfffe;
684 rx_creg |= 0x0002;
685 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
686 } else {
687 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
688 rx_creg &= 0x00fc;
689 }
690 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
691 netif_wake_queue(netdev);
692 }
693
rtl8150_start_xmit(struct sk_buff * skb,struct net_device * netdev)694 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
695 struct net_device *netdev)
696 {
697 rtl8150_t *dev = netdev_priv(netdev);
698 int count, res;
699
700 netif_stop_queue(netdev);
701 count = (skb->len < 60) ? 60 : skb->len;
702 count = (count & 0x3f) ? count : count + 1;
703 dev->tx_skb = skb;
704 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
705 skb->data, count, write_bulk_callback, dev);
706 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
707 /* Can we get/handle EPIPE here? */
708 if (res == -ENODEV)
709 netif_device_detach(dev->netdev);
710 else {
711 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
712 netdev->stats.tx_errors++;
713 netif_start_queue(netdev);
714 }
715 } else {
716 netdev->stats.tx_packets++;
717 netdev->stats.tx_bytes += skb->len;
718 netif_trans_update(netdev);
719 }
720
721 return NETDEV_TX_OK;
722 }
723
724
set_carrier(struct net_device * netdev)725 static void set_carrier(struct net_device *netdev)
726 {
727 rtl8150_t *dev = netdev_priv(netdev);
728 short tmp;
729
730 get_registers(dev, CSCR, 2, &tmp);
731 if (tmp & CSCR_LINK_STATUS)
732 netif_carrier_on(netdev);
733 else
734 netif_carrier_off(netdev);
735 }
736
rtl8150_open(struct net_device * netdev)737 static int rtl8150_open(struct net_device *netdev)
738 {
739 rtl8150_t *dev = netdev_priv(netdev);
740 int res;
741
742 if (dev->rx_skb == NULL)
743 dev->rx_skb = pull_skb(dev);
744 if (!dev->rx_skb)
745 return -ENOMEM;
746
747 set_registers(dev, IDR, 6, netdev->dev_addr);
748
749 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
750 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
751 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
752 if (res == -ENODEV)
753 netif_device_detach(dev->netdev);
754 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
755 return res;
756 }
757 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
758 dev->intr_buff, INTBUFSIZE, intr_callback,
759 dev, dev->intr_interval);
760 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
761 if (res == -ENODEV)
762 netif_device_detach(dev->netdev);
763 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
764 usb_kill_urb(dev->rx_urb);
765 return res;
766 }
767 enable_net_traffic(dev);
768 set_carrier(netdev);
769 netif_start_queue(netdev);
770
771 return res;
772 }
773
rtl8150_close(struct net_device * netdev)774 static int rtl8150_close(struct net_device *netdev)
775 {
776 rtl8150_t *dev = netdev_priv(netdev);
777
778 netif_stop_queue(netdev);
779 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
780 disable_net_traffic(dev);
781 unlink_all_urbs(dev);
782
783 return 0;
784 }
785
rtl8150_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)786 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
787 {
788 rtl8150_t *dev = netdev_priv(netdev);
789
790 strlcpy(info->driver, driver_name, sizeof(info->driver));
791 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
792 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
793 }
794
rtl8150_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * ecmd)795 static int rtl8150_get_link_ksettings(struct net_device *netdev,
796 struct ethtool_link_ksettings *ecmd)
797 {
798 rtl8150_t *dev = netdev_priv(netdev);
799 short lpa, bmcr;
800 u32 supported;
801
802 supported = (SUPPORTED_10baseT_Half |
803 SUPPORTED_10baseT_Full |
804 SUPPORTED_100baseT_Half |
805 SUPPORTED_100baseT_Full |
806 SUPPORTED_Autoneg |
807 SUPPORTED_TP | SUPPORTED_MII);
808 ecmd->base.port = PORT_TP;
809 ecmd->base.phy_address = dev->phy;
810 get_registers(dev, BMCR, 2, &bmcr);
811 get_registers(dev, ANLP, 2, &lpa);
812 if (bmcr & BMCR_ANENABLE) {
813 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
814 SPEED_100 : SPEED_10);
815 ecmd->base.speed = speed;
816 ecmd->base.autoneg = AUTONEG_ENABLE;
817 if (speed == SPEED_100)
818 ecmd->base.duplex = (lpa & LPA_100FULL) ?
819 DUPLEX_FULL : DUPLEX_HALF;
820 else
821 ecmd->base.duplex = (lpa & LPA_10FULL) ?
822 DUPLEX_FULL : DUPLEX_HALF;
823 } else {
824 ecmd->base.autoneg = AUTONEG_DISABLE;
825 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
826 SPEED_100 : SPEED_10);
827 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
828 DUPLEX_FULL : DUPLEX_HALF;
829 }
830
831 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
832 supported);
833
834 return 0;
835 }
836
837 static const struct ethtool_ops ops = {
838 .get_drvinfo = rtl8150_get_drvinfo,
839 .get_link = ethtool_op_get_link,
840 .get_link_ksettings = rtl8150_get_link_ksettings,
841 };
842
rtl8150_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)843 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
844 {
845 rtl8150_t *dev = netdev_priv(netdev);
846 u16 *data = (u16 *) & rq->ifr_ifru;
847 int res = 0;
848
849 switch (cmd) {
850 case SIOCDEVPRIVATE:
851 data[0] = dev->phy;
852 case SIOCDEVPRIVATE + 1:
853 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
854 break;
855 case SIOCDEVPRIVATE + 2:
856 if (!capable(CAP_NET_ADMIN))
857 return -EPERM;
858 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
859 break;
860 default:
861 res = -EOPNOTSUPP;
862 }
863
864 return res;
865 }
866
867 static const struct net_device_ops rtl8150_netdev_ops = {
868 .ndo_open = rtl8150_open,
869 .ndo_stop = rtl8150_close,
870 .ndo_do_ioctl = rtl8150_ioctl,
871 .ndo_start_xmit = rtl8150_start_xmit,
872 .ndo_tx_timeout = rtl8150_tx_timeout,
873 .ndo_set_rx_mode = rtl8150_set_multicast,
874 .ndo_set_mac_address = rtl8150_set_mac_address,
875
876 .ndo_validate_addr = eth_validate_addr,
877 };
878
rtl8150_probe(struct usb_interface * intf,const struct usb_device_id * id)879 static int rtl8150_probe(struct usb_interface *intf,
880 const struct usb_device_id *id)
881 {
882 struct usb_device *udev = interface_to_usbdev(intf);
883 rtl8150_t *dev;
884 struct net_device *netdev;
885
886 netdev = alloc_etherdev(sizeof(rtl8150_t));
887 if (!netdev)
888 return -ENOMEM;
889
890 dev = netdev_priv(netdev);
891
892 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
893 if (!dev->intr_buff) {
894 free_netdev(netdev);
895 return -ENOMEM;
896 }
897
898 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
899 spin_lock_init(&dev->rx_pool_lock);
900
901 dev->udev = udev;
902 dev->netdev = netdev;
903 netdev->netdev_ops = &rtl8150_netdev_ops;
904 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
905 netdev->ethtool_ops = &ops;
906 dev->intr_interval = 100; /* 100ms */
907
908 if (!alloc_all_urbs(dev)) {
909 dev_err(&intf->dev, "out of memory\n");
910 goto out;
911 }
912 if (!rtl8150_reset(dev)) {
913 dev_err(&intf->dev, "couldn't reset the device\n");
914 goto out1;
915 }
916 fill_skb_pool(dev);
917 set_ethernet_addr(dev);
918
919 usb_set_intfdata(intf, dev);
920 SET_NETDEV_DEV(netdev, &intf->dev);
921 if (register_netdev(netdev) != 0) {
922 dev_err(&intf->dev, "couldn't register the device\n");
923 goto out2;
924 }
925
926 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
927
928 return 0;
929
930 out2:
931 usb_set_intfdata(intf, NULL);
932 free_skb_pool(dev);
933 out1:
934 free_all_urbs(dev);
935 out:
936 kfree(dev->intr_buff);
937 free_netdev(netdev);
938 return -EIO;
939 }
940
rtl8150_disconnect(struct usb_interface * intf)941 static void rtl8150_disconnect(struct usb_interface *intf)
942 {
943 rtl8150_t *dev = usb_get_intfdata(intf);
944
945 usb_set_intfdata(intf, NULL);
946 if (dev) {
947 set_bit(RTL8150_UNPLUG, &dev->flags);
948 tasklet_kill(&dev->tl);
949 unregister_netdev(dev->netdev);
950 unlink_all_urbs(dev);
951 free_all_urbs(dev);
952 free_skb_pool(dev);
953 if (dev->rx_skb)
954 dev_kfree_skb(dev->rx_skb);
955 kfree(dev->intr_buff);
956 free_netdev(dev->netdev);
957 }
958 }
959
960 static struct usb_driver rtl8150_driver = {
961 .name = driver_name,
962 .probe = rtl8150_probe,
963 .disconnect = rtl8150_disconnect,
964 .id_table = rtl8150_table,
965 .suspend = rtl8150_suspend,
966 .resume = rtl8150_resume,
967 .disable_hub_initiated_lpm = 1,
968 };
969
970 module_usb_driver(rtl8150_driver);
971
972 MODULE_AUTHOR(DRIVER_AUTHOR);
973 MODULE_DESCRIPTION(DRIVER_DESC);
974 MODULE_LICENSE("GPL");
975
