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 void set_ethernet_addr(rtl8150_t *dev)
281 {
282 u8 node_id[ETH_ALEN];
283 int ret;
284
285 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
286
287 if (ret == sizeof(node_id)) {
288 ether_addr_copy(dev->netdev->dev_addr, node_id);
289 } else {
290 eth_hw_addr_random(dev->netdev);
291 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
292 dev->netdev->dev_addr);
293 }
294 }
295
rtl8150_set_mac_address(struct net_device * netdev,void * p)296 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
297 {
298 struct sockaddr *addr = p;
299 rtl8150_t *dev = netdev_priv(netdev);
300
301 if (netif_running(netdev))
302 return -EBUSY;
303
304 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
305 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
306 /* Set the IDR registers. */
307 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
308 #ifdef EEPROM_WRITE
309 {
310 int i;
311 u8 cr;
312 /* Get the CR contents. */
313 get_registers(dev, CR, 1, &cr);
314 /* Set the WEPROM bit (eeprom write enable). */
315 cr |= 0x20;
316 set_registers(dev, CR, 1, &cr);
317 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
318 so we need to split them up. */
319 for (i = 0; i * 2 < netdev->addr_len; i++) {
320 set_registers(dev, IDR_EEPROM + (i * 2), 2,
321 netdev->dev_addr + (i * 2));
322 }
323 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
324 cr &= 0xdf;
325 set_registers(dev, CR, 1, &cr);
326 }
327 #endif
328 return 0;
329 }
330
rtl8150_reset(rtl8150_t * dev)331 static int rtl8150_reset(rtl8150_t * dev)
332 {
333 u8 data = 0x10;
334 int i = HZ;
335
336 set_registers(dev, CR, 1, &data);
337 do {
338 get_registers(dev, CR, 1, &data);
339 } while ((data & 0x10) && --i);
340
341 return (i > 0) ? 1 : 0;
342 }
343
alloc_all_urbs(rtl8150_t * dev)344 static int alloc_all_urbs(rtl8150_t * dev)
345 {
346 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
347 if (!dev->rx_urb)
348 return 0;
349 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
350 if (!dev->tx_urb) {
351 usb_free_urb(dev->rx_urb);
352 return 0;
353 }
354 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
355 if (!dev->intr_urb) {
356 usb_free_urb(dev->rx_urb);
357 usb_free_urb(dev->tx_urb);
358 return 0;
359 }
360
361 return 1;
362 }
363
free_all_urbs(rtl8150_t * dev)364 static void free_all_urbs(rtl8150_t * dev)
365 {
366 usb_free_urb(dev->rx_urb);
367 usb_free_urb(dev->tx_urb);
368 usb_free_urb(dev->intr_urb);
369 }
370
unlink_all_urbs(rtl8150_t * dev)371 static void unlink_all_urbs(rtl8150_t * dev)
372 {
373 usb_kill_urb(dev->rx_urb);
374 usb_kill_urb(dev->tx_urb);
375 usb_kill_urb(dev->intr_urb);
376 }
377
pull_skb(rtl8150_t * dev)378 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
379 {
380 struct sk_buff *skb;
381 int i;
382
383 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
384 if (dev->rx_skb_pool[i]) {
385 skb = dev->rx_skb_pool[i];
386 dev->rx_skb_pool[i] = NULL;
387 return skb;
388 }
389 }
390 return NULL;
391 }
392
read_bulk_callback(struct urb * urb)393 static void read_bulk_callback(struct urb *urb)
394 {
395 rtl8150_t *dev;
396 unsigned pkt_len, res;
397 struct sk_buff *skb;
398 struct net_device *netdev;
399 u16 rx_stat;
400 int status = urb->status;
401 int result;
402 unsigned long flags;
403
404 dev = urb->context;
405 if (!dev)
406 return;
407 if (test_bit(RTL8150_UNPLUG, &dev->flags))
408 return;
409 netdev = dev->netdev;
410 if (!netif_device_present(netdev))
411 return;
412
413 switch (status) {
414 case 0:
415 break;
416 case -ENOENT:
417 return; /* the urb is in unlink state */
418 case -ETIME:
419 if (printk_ratelimit())
420 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
421 goto goon;
422 default:
423 if (printk_ratelimit())
424 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
425 goto goon;
426 }
427
428 if (!dev->rx_skb)
429 goto resched;
430 /* protect against short packets (tell me why we got some?!?) */
431 if (urb->actual_length < 4)
432 goto goon;
433
434 res = urb->actual_length;
435 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
436 pkt_len = res - 4;
437
438 skb_put(dev->rx_skb, pkt_len);
439 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
440 netif_rx(dev->rx_skb);
441 netdev->stats.rx_packets++;
442 netdev->stats.rx_bytes += pkt_len;
443
444 spin_lock_irqsave(&dev->rx_pool_lock, flags);
445 skb = pull_skb(dev);
446 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
447 if (!skb)
448 goto resched;
449
450 dev->rx_skb = skb;
451 goon:
452 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
453 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
454 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
455 if (result == -ENODEV)
456 netif_device_detach(dev->netdev);
457 else if (result) {
458 set_bit(RX_URB_FAIL, &dev->flags);
459 goto resched;
460 } else {
461 clear_bit(RX_URB_FAIL, &dev->flags);
462 }
463
464 return;
465 resched:
466 tasklet_schedule(&dev->tl);
467 }
468
write_bulk_callback(struct urb * urb)469 static void write_bulk_callback(struct urb *urb)
470 {
471 rtl8150_t *dev;
472 int status = urb->status;
473
474 dev = urb->context;
475 if (!dev)
476 return;
477 dev_kfree_skb_irq(dev->tx_skb);
478 if (!netif_device_present(dev->netdev))
479 return;
480 if (status)
481 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
482 dev->netdev->name, status);
483 netif_trans_update(dev->netdev);
484 netif_wake_queue(dev->netdev);
485 }
486
intr_callback(struct urb * urb)487 static void intr_callback(struct urb *urb)
488 {
489 rtl8150_t *dev;
490 __u8 *d;
491 int status = urb->status;
492 int res;
493
494 dev = urb->context;
495 if (!dev)
496 return;
497 switch (status) {
498 case 0: /* success */
499 break;
500 case -ECONNRESET: /* unlink */
501 case -ENOENT:
502 case -ESHUTDOWN:
503 return;
504 /* -EPIPE: should clear the halt */
505 default:
506 dev_info(&urb->dev->dev, "%s: intr status %d\n",
507 dev->netdev->name, status);
508 goto resubmit;
509 }
510
511 d = urb->transfer_buffer;
512 if (d[0] & TSR_ERRORS) {
513 dev->netdev->stats.tx_errors++;
514 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
515 dev->netdev->stats.tx_aborted_errors++;
516 if (d[INT_TSR] & TSR_LCOL)
517 dev->netdev->stats.tx_window_errors++;
518 if (d[INT_TSR] & TSR_LOSS_CRS)
519 dev->netdev->stats.tx_carrier_errors++;
520 }
521 /* Report link status changes to the network stack */
522 if ((d[INT_MSR] & MSR_LINK) == 0) {
523 if (netif_carrier_ok(dev->netdev)) {
524 netif_carrier_off(dev->netdev);
525 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
526 }
527 } else {
528 if (!netif_carrier_ok(dev->netdev)) {
529 netif_carrier_on(dev->netdev);
530 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
531 }
532 }
533
534 resubmit:
535 res = usb_submit_urb (urb, GFP_ATOMIC);
536 if (res == -ENODEV)
537 netif_device_detach(dev->netdev);
538 else if (res)
539 dev_err(&dev->udev->dev,
540 "can't resubmit intr, %s-%s/input0, status %d\n",
541 dev->udev->bus->bus_name, dev->udev->devpath, res);
542 }
543
rtl8150_suspend(struct usb_interface * intf,pm_message_t message)544 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
545 {
546 rtl8150_t *dev = usb_get_intfdata(intf);
547
548 netif_device_detach(dev->netdev);
549
550 if (netif_running(dev->netdev)) {
551 usb_kill_urb(dev->rx_urb);
552 usb_kill_urb(dev->intr_urb);
553 }
554 return 0;
555 }
556
rtl8150_resume(struct usb_interface * intf)557 static int rtl8150_resume(struct usb_interface *intf)
558 {
559 rtl8150_t *dev = usb_get_intfdata(intf);
560
561 netif_device_attach(dev->netdev);
562 if (netif_running(dev->netdev)) {
563 dev->rx_urb->status = 0;
564 dev->rx_urb->actual_length = 0;
565 read_bulk_callback(dev->rx_urb);
566
567 dev->intr_urb->status = 0;
568 dev->intr_urb->actual_length = 0;
569 intr_callback(dev->intr_urb);
570 }
571 return 0;
572 }
573
574 /*
575 **
576 ** network related part of the code
577 **
578 */
579
fill_skb_pool(rtl8150_t * dev)580 static void fill_skb_pool(rtl8150_t *dev)
581 {
582 struct sk_buff *skb;
583 int i;
584
585 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
586 if (dev->rx_skb_pool[i])
587 continue;
588 skb = dev_alloc_skb(RTL8150_MTU + 2);
589 if (!skb) {
590 return;
591 }
592 skb_reserve(skb, 2);
593 dev->rx_skb_pool[i] = skb;
594 }
595 }
596
free_skb_pool(rtl8150_t * dev)597 static void free_skb_pool(rtl8150_t *dev)
598 {
599 int i;
600
601 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
602 if (dev->rx_skb_pool[i])
603 dev_kfree_skb(dev->rx_skb_pool[i]);
604 }
605
rx_fixup(unsigned long data)606 static void rx_fixup(unsigned long data)
607 {
608 struct rtl8150 *dev = (struct rtl8150 *)data;
609 struct sk_buff *skb;
610 int status;
611
612 spin_lock_irq(&dev->rx_pool_lock);
613 fill_skb_pool(dev);
614 spin_unlock_irq(&dev->rx_pool_lock);
615 if (test_bit(RX_URB_FAIL, &dev->flags))
616 if (dev->rx_skb)
617 goto try_again;
618 spin_lock_irq(&dev->rx_pool_lock);
619 skb = pull_skb(dev);
620 spin_unlock_irq(&dev->rx_pool_lock);
621 if (skb == NULL)
622 goto tlsched;
623 dev->rx_skb = skb;
624 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
625 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
626 try_again:
627 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
628 if (status == -ENODEV) {
629 netif_device_detach(dev->netdev);
630 } else if (status) {
631 set_bit(RX_URB_FAIL, &dev->flags);
632 goto tlsched;
633 } else {
634 clear_bit(RX_URB_FAIL, &dev->flags);
635 }
636
637 return;
638 tlsched:
639 tasklet_schedule(&dev->tl);
640 }
641
enable_net_traffic(rtl8150_t * dev)642 static int enable_net_traffic(rtl8150_t * dev)
643 {
644 u8 cr, tcr, rcr, msr;
645
646 if (!rtl8150_reset(dev)) {
647 dev_warn(&dev->udev->dev, "device reset failed\n");
648 }
649 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
650 rcr = 0x9e;
651 tcr = 0xd8;
652 cr = 0x0c;
653 if (!(rcr & 0x80))
654 set_bit(RTL8150_HW_CRC, &dev->flags);
655 set_registers(dev, RCR, 1, &rcr);
656 set_registers(dev, TCR, 1, &tcr);
657 set_registers(dev, CR, 1, &cr);
658 get_registers(dev, MSR, 1, &msr);
659
660 return 0;
661 }
662
disable_net_traffic(rtl8150_t * dev)663 static void disable_net_traffic(rtl8150_t * dev)
664 {
665 u8 cr;
666
667 get_registers(dev, CR, 1, &cr);
668 cr &= 0xf3;
669 set_registers(dev, CR, 1, &cr);
670 }
671
rtl8150_tx_timeout(struct net_device * netdev)672 static void rtl8150_tx_timeout(struct net_device *netdev)
673 {
674 rtl8150_t *dev = netdev_priv(netdev);
675 dev_warn(&netdev->dev, "Tx timeout.\n");
676 usb_unlink_urb(dev->tx_urb);
677 netdev->stats.tx_errors++;
678 }
679
rtl8150_set_multicast(struct net_device * netdev)680 static void rtl8150_set_multicast(struct net_device *netdev)
681 {
682 rtl8150_t *dev = netdev_priv(netdev);
683 u16 rx_creg = 0x9e;
684
685 netif_stop_queue(netdev);
686 if (netdev->flags & IFF_PROMISC) {
687 rx_creg |= 0x0001;
688 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
689 } else if (!netdev_mc_empty(netdev) ||
690 (netdev->flags & IFF_ALLMULTI)) {
691 rx_creg &= 0xfffe;
692 rx_creg |= 0x0002;
693 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
694 } else {
695 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
696 rx_creg &= 0x00fc;
697 }
698 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
699 netif_wake_queue(netdev);
700 }
701
rtl8150_start_xmit(struct sk_buff * skb,struct net_device * netdev)702 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
703 struct net_device *netdev)
704 {
705 rtl8150_t *dev = netdev_priv(netdev);
706 int count, res;
707
708 netif_stop_queue(netdev);
709 count = (skb->len < 60) ? 60 : skb->len;
710 count = (count & 0x3f) ? count : count + 1;
711 dev->tx_skb = skb;
712 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
713 skb->data, count, write_bulk_callback, dev);
714 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
715 /* Can we get/handle EPIPE here? */
716 if (res == -ENODEV)
717 netif_device_detach(dev->netdev);
718 else {
719 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
720 netdev->stats.tx_errors++;
721 netif_start_queue(netdev);
722 }
723 } else {
724 netdev->stats.tx_packets++;
725 netdev->stats.tx_bytes += skb->len;
726 netif_trans_update(netdev);
727 }
728
729 return NETDEV_TX_OK;
730 }
731
732
set_carrier(struct net_device * netdev)733 static void set_carrier(struct net_device *netdev)
734 {
735 rtl8150_t *dev = netdev_priv(netdev);
736 short tmp;
737
738 get_registers(dev, CSCR, 2, &tmp);
739 if (tmp & CSCR_LINK_STATUS)
740 netif_carrier_on(netdev);
741 else
742 netif_carrier_off(netdev);
743 }
744
rtl8150_open(struct net_device * netdev)745 static int rtl8150_open(struct net_device *netdev)
746 {
747 rtl8150_t *dev = netdev_priv(netdev);
748 int res;
749
750 if (dev->rx_skb == NULL)
751 dev->rx_skb = pull_skb(dev);
752 if (!dev->rx_skb)
753 return -ENOMEM;
754
755 set_registers(dev, IDR, 6, netdev->dev_addr);
756
757 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
758 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
759 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
760 if (res == -ENODEV)
761 netif_device_detach(dev->netdev);
762 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
763 return res;
764 }
765 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
766 dev->intr_buff, INTBUFSIZE, intr_callback,
767 dev, dev->intr_interval);
768 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
769 if (res == -ENODEV)
770 netif_device_detach(dev->netdev);
771 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
772 usb_kill_urb(dev->rx_urb);
773 return res;
774 }
775 enable_net_traffic(dev);
776 set_carrier(netdev);
777 netif_start_queue(netdev);
778
779 return res;
780 }
781
rtl8150_close(struct net_device * netdev)782 static int rtl8150_close(struct net_device *netdev)
783 {
784 rtl8150_t *dev = netdev_priv(netdev);
785
786 netif_stop_queue(netdev);
787 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
788 disable_net_traffic(dev);
789 unlink_all_urbs(dev);
790
791 return 0;
792 }
793
rtl8150_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)794 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
795 {
796 rtl8150_t *dev = netdev_priv(netdev);
797
798 strlcpy(info->driver, driver_name, sizeof(info->driver));
799 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
800 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
801 }
802
rtl8150_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * ecmd)803 static int rtl8150_get_link_ksettings(struct net_device *netdev,
804 struct ethtool_link_ksettings *ecmd)
805 {
806 rtl8150_t *dev = netdev_priv(netdev);
807 short lpa, bmcr;
808 u32 supported;
809
810 supported = (SUPPORTED_10baseT_Half |
811 SUPPORTED_10baseT_Full |
812 SUPPORTED_100baseT_Half |
813 SUPPORTED_100baseT_Full |
814 SUPPORTED_Autoneg |
815 SUPPORTED_TP | SUPPORTED_MII);
816 ecmd->base.port = PORT_TP;
817 ecmd->base.phy_address = dev->phy;
818 get_registers(dev, BMCR, 2, &bmcr);
819 get_registers(dev, ANLP, 2, &lpa);
820 if (bmcr & BMCR_ANENABLE) {
821 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
822 SPEED_100 : SPEED_10);
823 ecmd->base.speed = speed;
824 ecmd->base.autoneg = AUTONEG_ENABLE;
825 if (speed == SPEED_100)
826 ecmd->base.duplex = (lpa & LPA_100FULL) ?
827 DUPLEX_FULL : DUPLEX_HALF;
828 else
829 ecmd->base.duplex = (lpa & LPA_10FULL) ?
830 DUPLEX_FULL : DUPLEX_HALF;
831 } else {
832 ecmd->base.autoneg = AUTONEG_DISABLE;
833 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
834 SPEED_100 : SPEED_10);
835 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
836 DUPLEX_FULL : DUPLEX_HALF;
837 }
838
839 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
840 supported);
841
842 return 0;
843 }
844
845 static const struct ethtool_ops ops = {
846 .get_drvinfo = rtl8150_get_drvinfo,
847 .get_link = ethtool_op_get_link,
848 .get_link_ksettings = rtl8150_get_link_ksettings,
849 };
850
rtl8150_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)851 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
852 {
853 rtl8150_t *dev = netdev_priv(netdev);
854 u16 *data = (u16 *) & rq->ifr_ifru;
855 int res = 0;
856
857 switch (cmd) {
858 case SIOCDEVPRIVATE:
859 data[0] = dev->phy;
860 case SIOCDEVPRIVATE + 1:
861 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
862 break;
863 case SIOCDEVPRIVATE + 2:
864 if (!capable(CAP_NET_ADMIN))
865 return -EPERM;
866 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
867 break;
868 default:
869 res = -EOPNOTSUPP;
870 }
871
872 return res;
873 }
874
875 static const struct net_device_ops rtl8150_netdev_ops = {
876 .ndo_open = rtl8150_open,
877 .ndo_stop = rtl8150_close,
878 .ndo_do_ioctl = rtl8150_ioctl,
879 .ndo_start_xmit = rtl8150_start_xmit,
880 .ndo_tx_timeout = rtl8150_tx_timeout,
881 .ndo_set_rx_mode = rtl8150_set_multicast,
882 .ndo_set_mac_address = rtl8150_set_mac_address,
883
884 .ndo_validate_addr = eth_validate_addr,
885 };
886
rtl8150_probe(struct usb_interface * intf,const struct usb_device_id * id)887 static int rtl8150_probe(struct usb_interface *intf,
888 const struct usb_device_id *id)
889 {
890 struct usb_device *udev = interface_to_usbdev(intf);
891 rtl8150_t *dev;
892 struct net_device *netdev;
893
894 netdev = alloc_etherdev(sizeof(rtl8150_t));
895 if (!netdev)
896 return -ENOMEM;
897
898 dev = netdev_priv(netdev);
899
900 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
901 if (!dev->intr_buff) {
902 free_netdev(netdev);
903 return -ENOMEM;
904 }
905
906 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
907 spin_lock_init(&dev->rx_pool_lock);
908
909 dev->udev = udev;
910 dev->netdev = netdev;
911 netdev->netdev_ops = &rtl8150_netdev_ops;
912 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
913 netdev->ethtool_ops = &ops;
914 dev->intr_interval = 100; /* 100ms */
915
916 if (!alloc_all_urbs(dev)) {
917 dev_err(&intf->dev, "out of memory\n");
918 goto out;
919 }
920 if (!rtl8150_reset(dev)) {
921 dev_err(&intf->dev, "couldn't reset the device\n");
922 goto out1;
923 }
924 fill_skb_pool(dev);
925 set_ethernet_addr(dev);
926
927 usb_set_intfdata(intf, dev);
928 SET_NETDEV_DEV(netdev, &intf->dev);
929 if (register_netdev(netdev) != 0) {
930 dev_err(&intf->dev, "couldn't register the device\n");
931 goto out2;
932 }
933
934 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
935
936 return 0;
937
938 out2:
939 usb_set_intfdata(intf, NULL);
940 free_skb_pool(dev);
941 out1:
942 free_all_urbs(dev);
943 out:
944 kfree(dev->intr_buff);
945 free_netdev(netdev);
946 return -EIO;
947 }
948
rtl8150_disconnect(struct usb_interface * intf)949 static void rtl8150_disconnect(struct usb_interface *intf)
950 {
951 rtl8150_t *dev = usb_get_intfdata(intf);
952
953 usb_set_intfdata(intf, NULL);
954 if (dev) {
955 set_bit(RTL8150_UNPLUG, &dev->flags);
956 tasklet_kill(&dev->tl);
957 unregister_netdev(dev->netdev);
958 unlink_all_urbs(dev);
959 free_all_urbs(dev);
960 free_skb_pool(dev);
961 if (dev->rx_skb)
962 dev_kfree_skb(dev->rx_skb);
963 kfree(dev->intr_buff);
964 free_netdev(dev->netdev);
965 }
966 }
967
968 static struct usb_driver rtl8150_driver = {
969 .name = driver_name,
970 .probe = rtl8150_probe,
971 .disconnect = rtl8150_disconnect,
972 .id_table = rtl8150_table,
973 .suspend = rtl8150_suspend,
974 .resume = rtl8150_resume,
975 .disable_hub_initiated_lpm = 1,
976 };
977
978 module_usb_driver(rtl8150_driver);
979
980 MODULE_AUTHOR(DRIVER_AUTHOR);
981 MODULE_DESCRIPTION(DRIVER_DESC);
982 MODULE_LICENSE("GPL");
983