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1/*
2 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
7 */
8
9#include <linux/signal.h>
10#include <linux/slab.h>
11#include <linux/module.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/mii.h>
15#include <linux/ethtool.h>
16#include <linux/usb.h>
17#include <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 */
115static 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
125MODULE_DEVICE_TABLE(usb, rtl8150_table);
126
127struct rtl8150 {
128 unsigned long flags;
129 struct usb_device *udev;
130 struct tasklet_struct tl;
131 struct net_device *netdev;
132 struct urb *rx_urb, *tx_urb, *intr_urb;
133 struct sk_buff *tx_skb, *rx_skb;
134 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
135 spinlock_t rx_pool_lock;
136 struct usb_ctrlrequest dr;
137 int intr_interval;
138 u8 *intr_buff;
139 u8 phy;
140};
141
142typedef struct rtl8150 rtl8150_t;
143
144struct async_req {
145 struct usb_ctrlrequest dr;
146 u16 rx_creg;
147};
148
149static const char driver_name [] = "rtl8150";
150
151/*
152**
153** device related part of the code
154**
155*/
156static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
157{
158 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
174static 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
190static 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
201static 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
233static 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
257static 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
280static 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
288static 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
323static 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
336static 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
356static 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
363static 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
370static 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
385static 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
395 dev = urb->context;
396 if (!dev)
397 return;
398 if (test_bit(RTL8150_UNPLUG, &dev->flags))
399 return;
400 netdev = dev->netdev;
401 if (!netif_device_present(netdev))
402 return;
403
404 switch (status) {
405 case 0:
406 break;
407 case -ENOENT:
408 return; /* the urb is in unlink state */
409 case -ETIME:
410 if (printk_ratelimit())
411 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
412 goto goon;
413 default:
414 if (printk_ratelimit())
415 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
416 goto goon;
417 }
418
419 if (!dev->rx_skb)
420 goto resched;
421 /* protect against short packets (tell me why we got some?!?) */
422 if (urb->actual_length < 4)
423 goto goon;
424
425 res = urb->actual_length;
426 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
427 pkt_len = res - 4;
428
429 skb_put(dev->rx_skb, pkt_len);
430 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
431 netif_rx(dev->rx_skb);
432 netdev->stats.rx_packets++;
433 netdev->stats.rx_bytes += pkt_len;
434
435 spin_lock(&dev->rx_pool_lock);
436 skb = pull_skb(dev);
437 spin_unlock(&dev->rx_pool_lock);
438 if (!skb)
439 goto resched;
440
441 dev->rx_skb = skb;
442goon:
443 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
444 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
445 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
446 if (result == -ENODEV)
447 netif_device_detach(dev->netdev);
448 else if (result) {
449 set_bit(RX_URB_FAIL, &dev->flags);
450 goto resched;
451 } else {
452 clear_bit(RX_URB_FAIL, &dev->flags);
453 }
454
455 return;
456resched:
457 tasklet_schedule(&dev->tl);
458}
459
460static void write_bulk_callback(struct urb *urb)
461{
462 rtl8150_t *dev;
463 int status = urb->status;
464
465 dev = urb->context;
466 if (!dev)
467 return;
468 dev_kfree_skb_irq(dev->tx_skb);
469 if (!netif_device_present(dev->netdev))
470 return;
471 if (status)
472 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
473 dev->netdev->name, status);
474 netif_trans_update(dev->netdev);
475 netif_wake_queue(dev->netdev);
476}
477
478static void intr_callback(struct urb *urb)
479{
480 rtl8150_t *dev;
481 __u8 *d;
482 int status = urb->status;
483 int res;
484
485 dev = urb->context;
486 if (!dev)
487 return;
488 switch (status) {
489 case 0: /* success */
490 break;
491 case -ECONNRESET: /* unlink */
492 case -ENOENT:
493 case -ESHUTDOWN:
494 return;
495 /* -EPIPE: should clear the halt */
496 default:
497 dev_info(&urb->dev->dev, "%s: intr status %d\n",
498 dev->netdev->name, status);
499 goto resubmit;
500 }
501
502 d = urb->transfer_buffer;
503 if (d[0] & TSR_ERRORS) {
504 dev->netdev->stats.tx_errors++;
505 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
506 dev->netdev->stats.tx_aborted_errors++;
507 if (d[INT_TSR] & TSR_LCOL)
508 dev->netdev->stats.tx_window_errors++;
509 if (d[INT_TSR] & TSR_LOSS_CRS)
510 dev->netdev->stats.tx_carrier_errors++;
511 }
512 /* Report link status changes to the network stack */
513 if ((d[INT_MSR] & MSR_LINK) == 0) {
514 if (netif_carrier_ok(dev->netdev)) {
515 netif_carrier_off(dev->netdev);
516 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
517 }
518 } else {
519 if (!netif_carrier_ok(dev->netdev)) {
520 netif_carrier_on(dev->netdev);
521 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
522 }
523 }
524
525resubmit:
526 res = usb_submit_urb (urb, GFP_ATOMIC);
527 if (res == -ENODEV)
528 netif_device_detach(dev->netdev);
529 else if (res)
530 dev_err(&dev->udev->dev,
531 "can't resubmit intr, %s-%s/input0, status %d\n",
532 dev->udev->bus->bus_name, dev->udev->devpath, res);
533}
534
535static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
536{
537 rtl8150_t *dev = usb_get_intfdata(intf);
538
539 netif_device_detach(dev->netdev);
540
541 if (netif_running(dev->netdev)) {
542 usb_kill_urb(dev->rx_urb);
543 usb_kill_urb(dev->intr_urb);
544 }
545 return 0;
546}
547
548static int rtl8150_resume(struct usb_interface *intf)
549{
550 rtl8150_t *dev = usb_get_intfdata(intf);
551
552 netif_device_attach(dev->netdev);
553 if (netif_running(dev->netdev)) {
554 dev->rx_urb->status = 0;
555 dev->rx_urb->actual_length = 0;
556 read_bulk_callback(dev->rx_urb);
557
558 dev->intr_urb->status = 0;
559 dev->intr_urb->actual_length = 0;
560 intr_callback(dev->intr_urb);
561 }
562 return 0;
563}
564
565/*
566**
567** network related part of the code
568**
569*/
570
571static void fill_skb_pool(rtl8150_t *dev)
572{
573 struct sk_buff *skb;
574 int i;
575
576 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
577 if (dev->rx_skb_pool[i])
578 continue;
579 skb = dev_alloc_skb(RTL8150_MTU + 2);
580 if (!skb) {
581 return;
582 }
583 skb_reserve(skb, 2);
584 dev->rx_skb_pool[i] = skb;
585 }
586}
587
588static void free_skb_pool(rtl8150_t *dev)
589{
590 int i;
591
592 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
593 if (dev->rx_skb_pool[i])
594 dev_kfree_skb(dev->rx_skb_pool[i]);
595}
596
597static void rx_fixup(unsigned long data)
598{
599 struct rtl8150 *dev = (struct rtl8150 *)data;
600 struct sk_buff *skb;
601 int status;
602
603 spin_lock_irq(&dev->rx_pool_lock);
604 fill_skb_pool(dev);
605 spin_unlock_irq(&dev->rx_pool_lock);
606 if (test_bit(RX_URB_FAIL, &dev->flags))
607 if (dev->rx_skb)
608 goto try_again;
609 spin_lock_irq(&dev->rx_pool_lock);
610 skb = pull_skb(dev);
611 spin_unlock_irq(&dev->rx_pool_lock);
612 if (skb == NULL)
613 goto tlsched;
614 dev->rx_skb = skb;
615 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
616 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
617try_again:
618 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
619 if (status == -ENODEV) {
620 netif_device_detach(dev->netdev);
621 } else if (status) {
622 set_bit(RX_URB_FAIL, &dev->flags);
623 goto tlsched;
624 } else {
625 clear_bit(RX_URB_FAIL, &dev->flags);
626 }
627
628 return;
629tlsched:
630 tasklet_schedule(&dev->tl);
631}
632
633static int enable_net_traffic(rtl8150_t * dev)
634{
635 u8 cr, tcr, rcr, msr;
636
637 if (!rtl8150_reset(dev)) {
638 dev_warn(&dev->udev->dev, "device reset failed\n");
639 }
640 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
641 rcr = 0x9e;
642 tcr = 0xd8;
643 cr = 0x0c;
644 if (!(rcr & 0x80))
645 set_bit(RTL8150_HW_CRC, &dev->flags);
646 set_registers(dev, RCR, 1, &rcr);
647 set_registers(dev, TCR, 1, &tcr);
648 set_registers(dev, CR, 1, &cr);
649 get_registers(dev, MSR, 1, &msr);
650
651 return 0;
652}
653
654static void disable_net_traffic(rtl8150_t * dev)
655{
656 u8 cr;
657
658 get_registers(dev, CR, 1, &cr);
659 cr &= 0xf3;
660 set_registers(dev, CR, 1, &cr);
661}
662
663static void rtl8150_tx_timeout(struct net_device *netdev)
664{
665 rtl8150_t *dev = netdev_priv(netdev);
666 dev_warn(&netdev->dev, "Tx timeout.\n");
667 usb_unlink_urb(dev->tx_urb);
668 netdev->stats.tx_errors++;
669}
670
671static void rtl8150_set_multicast(struct net_device *netdev)
672{
673 rtl8150_t *dev = netdev_priv(netdev);
674 u16 rx_creg = 0x9e;
675
676 netif_stop_queue(netdev);
677 if (netdev->flags & IFF_PROMISC) {
678 rx_creg |= 0x0001;
679 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
680 } else if (!netdev_mc_empty(netdev) ||
681 (netdev->flags & IFF_ALLMULTI)) {
682 rx_creg &= 0xfffe;
683 rx_creg |= 0x0002;
684 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
685 } else {
686 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
687 rx_creg &= 0x00fc;
688 }
689 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
690 netif_wake_queue(netdev);
691}
692
693static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
694 struct net_device *netdev)
695{
696 rtl8150_t *dev = netdev_priv(netdev);
697 int count, res;
698
699 netif_stop_queue(netdev);
700 count = (skb->len < 60) ? 60 : skb->len;
701 count = (count & 0x3f) ? count : count + 1;
702 dev->tx_skb = skb;
703 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
704 skb->data, count, write_bulk_callback, dev);
705 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
706 /* Can we get/handle EPIPE here? */
707 if (res == -ENODEV)
708 netif_device_detach(dev->netdev);
709 else {
710 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
711 netdev->stats.tx_errors++;
712 netif_start_queue(netdev);
713 }
714 } else {
715 netdev->stats.tx_packets++;
716 netdev->stats.tx_bytes += skb->len;
717 netif_trans_update(netdev);
718 }
719
720 return NETDEV_TX_OK;
721}
722
723
724static void set_carrier(struct net_device *netdev)
725{
726 rtl8150_t *dev = netdev_priv(netdev);
727 short tmp;
728
729 get_registers(dev, CSCR, 2, &tmp);
730 if (tmp & CSCR_LINK_STATUS)
731 netif_carrier_on(netdev);
732 else
733 netif_carrier_off(netdev);
734}
735
736static int rtl8150_open(struct net_device *netdev)
737{
738 rtl8150_t *dev = netdev_priv(netdev);
739 int res;
740
741 if (dev->rx_skb == NULL)
742 dev->rx_skb = pull_skb(dev);
743 if (!dev->rx_skb)
744 return -ENOMEM;
745
746 set_registers(dev, IDR, 6, netdev->dev_addr);
747
748 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
749 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
750 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
751 if (res == -ENODEV)
752 netif_device_detach(dev->netdev);
753 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
754 return res;
755 }
756 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
757 dev->intr_buff, INTBUFSIZE, intr_callback,
758 dev, dev->intr_interval);
759 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
760 if (res == -ENODEV)
761 netif_device_detach(dev->netdev);
762 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
763 usb_kill_urb(dev->rx_urb);
764 return res;
765 }
766 enable_net_traffic(dev);
767 set_carrier(netdev);
768 netif_start_queue(netdev);
769
770 return res;
771}
772
773static int rtl8150_close(struct net_device *netdev)
774{
775 rtl8150_t *dev = netdev_priv(netdev);
776
777 netif_stop_queue(netdev);
778 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
779 disable_net_traffic(dev);
780 unlink_all_urbs(dev);
781
782 return 0;
783}
784
785static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
786{
787 rtl8150_t *dev = netdev_priv(netdev);
788
789 strlcpy(info->driver, driver_name, sizeof(info->driver));
790 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
791 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
792}
793
794static int rtl8150_get_link_ksettings(struct net_device *netdev,
795 struct ethtool_link_ksettings *ecmd)
796{
797 rtl8150_t *dev = netdev_priv(netdev);
798 short lpa, bmcr;
799 u32 supported;
800
801 supported = (SUPPORTED_10baseT_Half |
802 SUPPORTED_10baseT_Full |
803 SUPPORTED_100baseT_Half |
804 SUPPORTED_100baseT_Full |
805 SUPPORTED_Autoneg |
806 SUPPORTED_TP | SUPPORTED_MII);
807 ecmd->base.port = PORT_TP;
808 ecmd->base.phy_address = dev->phy;
809 get_registers(dev, BMCR, 2, &bmcr);
810 get_registers(dev, ANLP, 2, &lpa);
811 if (bmcr & BMCR_ANENABLE) {
812 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
813 SPEED_100 : SPEED_10);
814 ecmd->base.speed = speed;
815 ecmd->base.autoneg = AUTONEG_ENABLE;
816 if (speed == SPEED_100)
817 ecmd->base.duplex = (lpa & LPA_100FULL) ?
818 DUPLEX_FULL : DUPLEX_HALF;
819 else
820 ecmd->base.duplex = (lpa & LPA_10FULL) ?
821 DUPLEX_FULL : DUPLEX_HALF;
822 } else {
823 ecmd->base.autoneg = AUTONEG_DISABLE;
824 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
825 SPEED_100 : SPEED_10);
826 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
827 DUPLEX_FULL : DUPLEX_HALF;
828 }
829
830 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
831 supported);
832
833 return 0;
834}
835
836static const struct ethtool_ops ops = {
837 .get_drvinfo = rtl8150_get_drvinfo,
838 .get_link = ethtool_op_get_link,
839 .get_link_ksettings = rtl8150_get_link_ksettings,
840};
841
842static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
843{
844 rtl8150_t *dev = netdev_priv(netdev);
845 u16 *data = (u16 *) & rq->ifr_ifru;
846 int res = 0;
847
848 switch (cmd) {
849 case SIOCDEVPRIVATE:
850 data[0] = dev->phy;
851 case SIOCDEVPRIVATE + 1:
852 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
853 break;
854 case SIOCDEVPRIVATE + 2:
855 if (!capable(CAP_NET_ADMIN))
856 return -EPERM;
857 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
858 break;
859 default:
860 res = -EOPNOTSUPP;
861 }
862
863 return res;
864}
865
866static const struct net_device_ops rtl8150_netdev_ops = {
867 .ndo_open = rtl8150_open,
868 .ndo_stop = rtl8150_close,
869 .ndo_do_ioctl = rtl8150_ioctl,
870 .ndo_start_xmit = rtl8150_start_xmit,
871 .ndo_tx_timeout = rtl8150_tx_timeout,
872 .ndo_set_rx_mode = rtl8150_set_multicast,
873 .ndo_set_mac_address = rtl8150_set_mac_address,
874
875 .ndo_validate_addr = eth_validate_addr,
876};
877
878static int rtl8150_probe(struct usb_interface *intf,
879 const struct usb_device_id *id)
880{
881 struct usb_device *udev = interface_to_usbdev(intf);
882 rtl8150_t *dev;
883 struct net_device *netdev;
884
885 netdev = alloc_etherdev(sizeof(rtl8150_t));
886 if (!netdev)
887 return -ENOMEM;
888
889 dev = netdev_priv(netdev);
890
891 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
892 if (!dev->intr_buff) {
893 free_netdev(netdev);
894 return -ENOMEM;
895 }
896
897 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
898 spin_lock_init(&dev->rx_pool_lock);
899
900 dev->udev = udev;
901 dev->netdev = netdev;
902 netdev->netdev_ops = &rtl8150_netdev_ops;
903 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
904 netdev->ethtool_ops = &ops;
905 dev->intr_interval = 100; /* 100ms */
906
907 if (!alloc_all_urbs(dev)) {
908 dev_err(&intf->dev, "out of memory\n");
909 goto out;
910 }
911 if (!rtl8150_reset(dev)) {
912 dev_err(&intf->dev, "couldn't reset the device\n");
913 goto out1;
914 }
915 fill_skb_pool(dev);
916 set_ethernet_addr(dev);
917
918 usb_set_intfdata(intf, dev);
919 SET_NETDEV_DEV(netdev, &intf->dev);
920 if (register_netdev(netdev) != 0) {
921 dev_err(&intf->dev, "couldn't register the device\n");
922 goto out2;
923 }
924
925 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
926
927 return 0;
928
929out2:
930 usb_set_intfdata(intf, NULL);
931 free_skb_pool(dev);
932out1:
933 free_all_urbs(dev);
934out:
935 kfree(dev->intr_buff);
936 free_netdev(netdev);
937 return -EIO;
938}
939
940static void rtl8150_disconnect(struct usb_interface *intf)
941{
942 rtl8150_t *dev = usb_get_intfdata(intf);
943
944 usb_set_intfdata(intf, NULL);
945 if (dev) {
946 set_bit(RTL8150_UNPLUG, &dev->flags);
947 tasklet_kill(&dev->tl);
948 unregister_netdev(dev->netdev);
949 unlink_all_urbs(dev);
950 free_all_urbs(dev);
951 free_skb_pool(dev);
952 if (dev->rx_skb)
953 dev_kfree_skb(dev->rx_skb);
954 kfree(dev->intr_buff);
955 free_netdev(dev->netdev);
956 }
957}
958
959static struct usb_driver rtl8150_driver = {
960 .name = driver_name,
961 .probe = rtl8150_probe,
962 .disconnect = rtl8150_disconnect,
963 .id_table = rtl8150_table,
964 .suspend = rtl8150_suspend,
965 .resume = rtl8150_resume,
966 .disable_hub_initiated_lpm = 1,
967};
968
969module_usb_driver(rtl8150_driver);
970
971MODULE_AUTHOR(DRIVER_AUTHOR);
972MODULE_DESCRIPTION(DRIVER_DESC);
973MODULE_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 inline void set_ethernet_addr(rtl8150_t * dev)
278{
279 u8 node_id[6];
280
281 get_registers(dev, IDR, sizeof(node_id), node_id);
282 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
283}
284
285static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
286{
287 struct sockaddr *addr = p;
288 rtl8150_t *dev = netdev_priv(netdev);
289
290 if (netif_running(netdev))
291 return -EBUSY;
292
293 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
294 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
295 /* Set the IDR registers. */
296 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
297#ifdef EEPROM_WRITE
298 {
299 int i;
300 u8 cr;
301 /* Get the CR contents. */
302 get_registers(dev, CR, 1, &cr);
303 /* Set the WEPROM bit (eeprom write enable). */
304 cr |= 0x20;
305 set_registers(dev, CR, 1, &cr);
306 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
307 so we need to split them up. */
308 for (i = 0; i * 2 < netdev->addr_len; i++) {
309 set_registers(dev, IDR_EEPROM + (i * 2), 2,
310 netdev->dev_addr + (i * 2));
311 }
312 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
313 cr &= 0xdf;
314 set_registers(dev, CR, 1, &cr);
315 }
316#endif
317 return 0;
318}
319
320static int rtl8150_reset(rtl8150_t * dev)
321{
322 u8 data = 0x10;
323 int i = HZ;
324
325 set_registers(dev, CR, 1, &data);
326 do {
327 get_registers(dev, CR, 1, &data);
328 } while ((data & 0x10) && --i);
329
330 return (i > 0) ? 1 : 0;
331}
332
333static int alloc_all_urbs(rtl8150_t * dev)
334{
335 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
336 if (!dev->rx_urb)
337 return 0;
338 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
339 if (!dev->tx_urb) {
340 usb_free_urb(dev->rx_urb);
341 return 0;
342 }
343 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
344 if (!dev->intr_urb) {
345 usb_free_urb(dev->rx_urb);
346 usb_free_urb(dev->tx_urb);
347 return 0;
348 }
349
350 return 1;
351}
352
353static void free_all_urbs(rtl8150_t * dev)
354{
355 usb_free_urb(dev->rx_urb);
356 usb_free_urb(dev->tx_urb);
357 usb_free_urb(dev->intr_urb);
358}
359
360static void unlink_all_urbs(rtl8150_t * dev)
361{
362 usb_kill_urb(dev->rx_urb);
363 usb_kill_urb(dev->tx_urb);
364 usb_kill_urb(dev->intr_urb);
365}
366
367static inline struct sk_buff *pull_skb(rtl8150_t *dev)
368{
369 struct sk_buff *skb;
370 int i;
371
372 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
373 if (dev->rx_skb_pool[i]) {
374 skb = dev->rx_skb_pool[i];
375 dev->rx_skb_pool[i] = NULL;
376 return skb;
377 }
378 }
379 return NULL;
380}
381
382static void read_bulk_callback(struct urb *urb)
383{
384 rtl8150_t *dev;
385 unsigned pkt_len, res;
386 struct sk_buff *skb;
387 struct net_device *netdev;
388 int status = urb->status;
389 int result;
390 unsigned long flags;
391
392 dev = urb->context;
393 if (!dev)
394 return;
395 if (test_bit(RTL8150_UNPLUG, &dev->flags))
396 return;
397 netdev = dev->netdev;
398 if (!netif_device_present(netdev))
399 return;
400
401 switch (status) {
402 case 0:
403 break;
404 case -ENOENT:
405 return; /* the urb is in unlink state */
406 case -ETIME:
407 if (printk_ratelimit())
408 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
409 goto goon;
410 default:
411 if (printk_ratelimit())
412 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
413 goto goon;
414 }
415
416 if (!dev->rx_skb)
417 goto resched;
418 /* protect against short packets (tell me why we got some?!?) */
419 if (urb->actual_length < 4)
420 goto goon;
421
422 res = urb->actual_length;
423 pkt_len = res - 4;
424
425 skb_put(dev->rx_skb, pkt_len);
426 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
427 netif_rx(dev->rx_skb);
428 netdev->stats.rx_packets++;
429 netdev->stats.rx_bytes += pkt_len;
430
431 spin_lock_irqsave(&dev->rx_pool_lock, flags);
432 skb = pull_skb(dev);
433 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
434 if (!skb)
435 goto resched;
436
437 dev->rx_skb = skb;
438goon:
439 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
440 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
441 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
442 if (result == -ENODEV)
443 netif_device_detach(dev->netdev);
444 else if (result) {
445 set_bit(RX_URB_FAIL, &dev->flags);
446 goto resched;
447 } else {
448 clear_bit(RX_URB_FAIL, &dev->flags);
449 }
450
451 return;
452resched:
453 tasklet_schedule(&dev->tl);
454}
455
456static void write_bulk_callback(struct urb *urb)
457{
458 rtl8150_t *dev;
459 int status = urb->status;
460
461 dev = urb->context;
462 if (!dev)
463 return;
464 dev_kfree_skb_irq(dev->tx_skb);
465 if (!netif_device_present(dev->netdev))
466 return;
467 if (status)
468 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
469 dev->netdev->name, status);
470 netif_trans_update(dev->netdev);
471 netif_wake_queue(dev->netdev);
472}
473
474static void intr_callback(struct urb *urb)
475{
476 rtl8150_t *dev;
477 __u8 *d;
478 int status = urb->status;
479 int res;
480
481 dev = urb->context;
482 if (!dev)
483 return;
484 switch (status) {
485 case 0: /* success */
486 break;
487 case -ECONNRESET: /* unlink */
488 case -ENOENT:
489 case -ESHUTDOWN:
490 return;
491 /* -EPIPE: should clear the halt */
492 default:
493 dev_info(&urb->dev->dev, "%s: intr status %d\n",
494 dev->netdev->name, status);
495 goto resubmit;
496 }
497
498 d = urb->transfer_buffer;
499 if (d[0] & TSR_ERRORS) {
500 dev->netdev->stats.tx_errors++;
501 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
502 dev->netdev->stats.tx_aborted_errors++;
503 if (d[INT_TSR] & TSR_LCOL)
504 dev->netdev->stats.tx_window_errors++;
505 if (d[INT_TSR] & TSR_LOSS_CRS)
506 dev->netdev->stats.tx_carrier_errors++;
507 }
508 /* Report link status changes to the network stack */
509 if ((d[INT_MSR] & MSR_LINK) == 0) {
510 if (netif_carrier_ok(dev->netdev)) {
511 netif_carrier_off(dev->netdev);
512 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
513 }
514 } else {
515 if (!netif_carrier_ok(dev->netdev)) {
516 netif_carrier_on(dev->netdev);
517 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
518 }
519 }
520
521resubmit:
522 res = usb_submit_urb (urb, GFP_ATOMIC);
523 if (res == -ENODEV)
524 netif_device_detach(dev->netdev);
525 else if (res)
526 dev_err(&dev->udev->dev,
527 "can't resubmit intr, %s-%s/input0, status %d\n",
528 dev->udev->bus->bus_name, dev->udev->devpath, res);
529}
530
531static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
532{
533 rtl8150_t *dev = usb_get_intfdata(intf);
534
535 netif_device_detach(dev->netdev);
536
537 if (netif_running(dev->netdev)) {
538 usb_kill_urb(dev->rx_urb);
539 usb_kill_urb(dev->intr_urb);
540 }
541 return 0;
542}
543
544static int rtl8150_resume(struct usb_interface *intf)
545{
546 rtl8150_t *dev = usb_get_intfdata(intf);
547
548 netif_device_attach(dev->netdev);
549 if (netif_running(dev->netdev)) {
550 dev->rx_urb->status = 0;
551 dev->rx_urb->actual_length = 0;
552 read_bulk_callback(dev->rx_urb);
553
554 dev->intr_urb->status = 0;
555 dev->intr_urb->actual_length = 0;
556 intr_callback(dev->intr_urb);
557 }
558 return 0;
559}
560
561/*
562**
563** network related part of the code
564**
565*/
566
567static void fill_skb_pool(rtl8150_t *dev)
568{
569 struct sk_buff *skb;
570 int i;
571
572 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
573 if (dev->rx_skb_pool[i])
574 continue;
575 skb = dev_alloc_skb(RTL8150_MTU + 2);
576 if (!skb) {
577 return;
578 }
579 skb_reserve(skb, 2);
580 dev->rx_skb_pool[i] = skb;
581 }
582}
583
584static void free_skb_pool(rtl8150_t *dev)
585{
586 int i;
587
588 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
589 dev_kfree_skb(dev->rx_skb_pool[i]);
590}
591
592static void rx_fixup(unsigned long data)
593{
594 struct rtl8150 *dev = (struct rtl8150 *)data;
595 struct sk_buff *skb;
596 int status;
597
598 spin_lock_irq(&dev->rx_pool_lock);
599 fill_skb_pool(dev);
600 spin_unlock_irq(&dev->rx_pool_lock);
601 if (test_bit(RX_URB_FAIL, &dev->flags))
602 if (dev->rx_skb)
603 goto try_again;
604 spin_lock_irq(&dev->rx_pool_lock);
605 skb = pull_skb(dev);
606 spin_unlock_irq(&dev->rx_pool_lock);
607 if (skb == NULL)
608 goto tlsched;
609 dev->rx_skb = skb;
610 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
611 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
612try_again:
613 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
614 if (status == -ENODEV) {
615 netif_device_detach(dev->netdev);
616 } else if (status) {
617 set_bit(RX_URB_FAIL, &dev->flags);
618 goto tlsched;
619 } else {
620 clear_bit(RX_URB_FAIL, &dev->flags);
621 }
622
623 return;
624tlsched:
625 tasklet_schedule(&dev->tl);
626}
627
628static int enable_net_traffic(rtl8150_t * dev)
629{
630 u8 cr, tcr, rcr, msr;
631
632 if (!rtl8150_reset(dev)) {
633 dev_warn(&dev->udev->dev, "device reset failed\n");
634 }
635 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
636 rcr = 0x9e;
637 tcr = 0xd8;
638 cr = 0x0c;
639 if (!(rcr & 0x80))
640 set_bit(RTL8150_HW_CRC, &dev->flags);
641 set_registers(dev, RCR, 1, &rcr);
642 set_registers(dev, TCR, 1, &tcr);
643 set_registers(dev, CR, 1, &cr);
644 get_registers(dev, MSR, 1, &msr);
645
646 return 0;
647}
648
649static void disable_net_traffic(rtl8150_t * dev)
650{
651 u8 cr;
652
653 get_registers(dev, CR, 1, &cr);
654 cr &= 0xf3;
655 set_registers(dev, CR, 1, &cr);
656}
657
658static void rtl8150_tx_timeout(struct net_device *netdev)
659{
660 rtl8150_t *dev = netdev_priv(netdev);
661 dev_warn(&netdev->dev, "Tx timeout.\n");
662 usb_unlink_urb(dev->tx_urb);
663 netdev->stats.tx_errors++;
664}
665
666static void rtl8150_set_multicast(struct net_device *netdev)
667{
668 rtl8150_t *dev = netdev_priv(netdev);
669 u16 rx_creg = 0x9e;
670
671 netif_stop_queue(netdev);
672 if (netdev->flags & IFF_PROMISC) {
673 rx_creg |= 0x0001;
674 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
675 } else if (!netdev_mc_empty(netdev) ||
676 (netdev->flags & IFF_ALLMULTI)) {
677 rx_creg &= 0xfffe;
678 rx_creg |= 0x0002;
679 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
680 } else {
681 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
682 rx_creg &= 0x00fc;
683 }
684 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
685 netif_wake_queue(netdev);
686}
687
688static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
689 struct net_device *netdev)
690{
691 rtl8150_t *dev = netdev_priv(netdev);
692 int count, res;
693
694 netif_stop_queue(netdev);
695 count = (skb->len < 60) ? 60 : skb->len;
696 count = (count & 0x3f) ? count : count + 1;
697 dev->tx_skb = skb;
698 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
699 skb->data, count, write_bulk_callback, dev);
700 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
701 /* Can we get/handle EPIPE here? */
702 if (res == -ENODEV)
703 netif_device_detach(dev->netdev);
704 else {
705 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
706 netdev->stats.tx_errors++;
707 netif_start_queue(netdev);
708 }
709 } else {
710 netdev->stats.tx_packets++;
711 netdev->stats.tx_bytes += skb->len;
712 netif_trans_update(netdev);
713 }
714
715 return NETDEV_TX_OK;
716}
717
718
719static void set_carrier(struct net_device *netdev)
720{
721 rtl8150_t *dev = netdev_priv(netdev);
722 short tmp;
723
724 get_registers(dev, CSCR, 2, &tmp);
725 if (tmp & CSCR_LINK_STATUS)
726 netif_carrier_on(netdev);
727 else
728 netif_carrier_off(netdev);
729}
730
731static int rtl8150_open(struct net_device *netdev)
732{
733 rtl8150_t *dev = netdev_priv(netdev);
734 int res;
735
736 if (dev->rx_skb == NULL)
737 dev->rx_skb = pull_skb(dev);
738 if (!dev->rx_skb)
739 return -ENOMEM;
740
741 set_registers(dev, IDR, 6, netdev->dev_addr);
742
743 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
744 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
745 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
746 if (res == -ENODEV)
747 netif_device_detach(dev->netdev);
748 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
749 return res;
750 }
751 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
752 dev->intr_buff, INTBUFSIZE, intr_callback,
753 dev, dev->intr_interval);
754 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
755 if (res == -ENODEV)
756 netif_device_detach(dev->netdev);
757 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
758 usb_kill_urb(dev->rx_urb);
759 return res;
760 }
761 enable_net_traffic(dev);
762 set_carrier(netdev);
763 netif_start_queue(netdev);
764
765 return res;
766}
767
768static int rtl8150_close(struct net_device *netdev)
769{
770 rtl8150_t *dev = netdev_priv(netdev);
771
772 netif_stop_queue(netdev);
773 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
774 disable_net_traffic(dev);
775 unlink_all_urbs(dev);
776
777 return 0;
778}
779
780static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
781{
782 rtl8150_t *dev = netdev_priv(netdev);
783
784 strlcpy(info->driver, driver_name, sizeof(info->driver));
785 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
786 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
787}
788
789static int rtl8150_get_link_ksettings(struct net_device *netdev,
790 struct ethtool_link_ksettings *ecmd)
791{
792 rtl8150_t *dev = netdev_priv(netdev);
793 short lpa, bmcr;
794 u32 supported;
795
796 supported = (SUPPORTED_10baseT_Half |
797 SUPPORTED_10baseT_Full |
798 SUPPORTED_100baseT_Half |
799 SUPPORTED_100baseT_Full |
800 SUPPORTED_Autoneg |
801 SUPPORTED_TP | SUPPORTED_MII);
802 ecmd->base.port = PORT_TP;
803 ecmd->base.phy_address = dev->phy;
804 get_registers(dev, BMCR, 2, &bmcr);
805 get_registers(dev, ANLP, 2, &lpa);
806 if (bmcr & BMCR_ANENABLE) {
807 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
808 SPEED_100 : SPEED_10);
809 ecmd->base.speed = speed;
810 ecmd->base.autoneg = AUTONEG_ENABLE;
811 if (speed == SPEED_100)
812 ecmd->base.duplex = (lpa & LPA_100FULL) ?
813 DUPLEX_FULL : DUPLEX_HALF;
814 else
815 ecmd->base.duplex = (lpa & LPA_10FULL) ?
816 DUPLEX_FULL : DUPLEX_HALF;
817 } else {
818 ecmd->base.autoneg = AUTONEG_DISABLE;
819 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
820 SPEED_100 : SPEED_10);
821 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
822 DUPLEX_FULL : DUPLEX_HALF;
823 }
824
825 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
826 supported);
827
828 return 0;
829}
830
831static const struct ethtool_ops ops = {
832 .get_drvinfo = rtl8150_get_drvinfo,
833 .get_link = ethtool_op_get_link,
834 .get_link_ksettings = rtl8150_get_link_ksettings,
835};
836
837static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
838{
839 rtl8150_t *dev = netdev_priv(netdev);
840 u16 *data = (u16 *) & rq->ifr_ifru;
841 int res = 0;
842
843 switch (cmd) {
844 case SIOCDEVPRIVATE:
845 data[0] = dev->phy;
846 /* fall through */
847 case SIOCDEVPRIVATE + 1:
848 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
849 break;
850 case SIOCDEVPRIVATE + 2:
851 if (!capable(CAP_NET_ADMIN))
852 return -EPERM;
853 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
854 break;
855 default:
856 res = -EOPNOTSUPP;
857 }
858
859 return res;
860}
861
862static const struct net_device_ops rtl8150_netdev_ops = {
863 .ndo_open = rtl8150_open,
864 .ndo_stop = rtl8150_close,
865 .ndo_do_ioctl = rtl8150_ioctl,
866 .ndo_start_xmit = rtl8150_start_xmit,
867 .ndo_tx_timeout = rtl8150_tx_timeout,
868 .ndo_set_rx_mode = rtl8150_set_multicast,
869 .ndo_set_mac_address = rtl8150_set_mac_address,
870
871 .ndo_validate_addr = eth_validate_addr,
872};
873
874static int rtl8150_probe(struct usb_interface *intf,
875 const struct usb_device_id *id)
876{
877 struct usb_device *udev = interface_to_usbdev(intf);
878 rtl8150_t *dev;
879 struct net_device *netdev;
880
881 netdev = alloc_etherdev(sizeof(rtl8150_t));
882 if (!netdev)
883 return -ENOMEM;
884
885 dev = netdev_priv(netdev);
886
887 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
888 if (!dev->intr_buff) {
889 free_netdev(netdev);
890 return -ENOMEM;
891 }
892
893 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
894 spin_lock_init(&dev->rx_pool_lock);
895
896 dev->udev = udev;
897 dev->netdev = netdev;
898 netdev->netdev_ops = &rtl8150_netdev_ops;
899 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
900 netdev->ethtool_ops = &ops;
901 dev->intr_interval = 100; /* 100ms */
902
903 if (!alloc_all_urbs(dev)) {
904 dev_err(&intf->dev, "out of memory\n");
905 goto out;
906 }
907 if (!rtl8150_reset(dev)) {
908 dev_err(&intf->dev, "couldn't reset the device\n");
909 goto out1;
910 }
911 fill_skb_pool(dev);
912 set_ethernet_addr(dev);
913
914 usb_set_intfdata(intf, dev);
915 SET_NETDEV_DEV(netdev, &intf->dev);
916 if (register_netdev(netdev) != 0) {
917 dev_err(&intf->dev, "couldn't register the device\n");
918 goto out2;
919 }
920
921 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
922
923 return 0;
924
925out2:
926 usb_set_intfdata(intf, NULL);
927 free_skb_pool(dev);
928out1:
929 free_all_urbs(dev);
930out:
931 kfree(dev->intr_buff);
932 free_netdev(netdev);
933 return -EIO;
934}
935
936static void rtl8150_disconnect(struct usb_interface *intf)
937{
938 rtl8150_t *dev = usb_get_intfdata(intf);
939
940 usb_set_intfdata(intf, NULL);
941 if (dev) {
942 set_bit(RTL8150_UNPLUG, &dev->flags);
943 tasklet_kill(&dev->tl);
944 unregister_netdev(dev->netdev);
945 unlink_all_urbs(dev);
946 free_all_urbs(dev);
947 free_skb_pool(dev);
948 dev_kfree_skb(dev->rx_skb);
949 kfree(dev->intr_buff);
950 free_netdev(dev->netdev);
951 }
952}
953
954static struct usb_driver rtl8150_driver = {
955 .name = driver_name,
956 .probe = rtl8150_probe,
957 .disconnect = rtl8150_disconnect,
958 .id_table = rtl8150_table,
959 .suspend = rtl8150_suspend,
960 .resume = rtl8150_resume,
961 .disable_hub_initiated_lpm = 1,
962};
963
964module_usb_driver(rtl8150_driver);
965
966MODULE_AUTHOR(DRIVER_AUTHOR);
967MODULE_DESCRIPTION(DRIVER_DESC);
968MODULE_LICENSE("GPL");