Loading...
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 return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
156 RTL8150_REQT_READ, indx, 0, data, size,
157 1000, GFP_NOIO);
158}
159
160static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
161{
162 return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
163 RTL8150_REQT_WRITE, indx, 0, data, size,
164 1000, GFP_NOIO);
165}
166
167static void async_set_reg_cb(struct urb *urb)
168{
169 struct async_req *req = (struct async_req *)urb->context;
170 int status = urb->status;
171
172 if (status < 0)
173 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
174 kfree(req);
175 usb_free_urb(urb);
176}
177
178static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
179{
180 int res = -ENOMEM;
181 struct urb *async_urb;
182 struct async_req *req;
183
184 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
185 if (req == NULL)
186 return res;
187 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
188 if (async_urb == NULL) {
189 kfree(req);
190 return res;
191 }
192 req->rx_creg = cpu_to_le16(reg);
193 req->dr.bRequestType = RTL8150_REQT_WRITE;
194 req->dr.bRequest = RTL8150_REQ_SET_REGS;
195 req->dr.wIndex = 0;
196 req->dr.wValue = cpu_to_le16(indx);
197 req->dr.wLength = cpu_to_le16(size);
198 usb_fill_control_urb(async_urb, dev->udev,
199 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
200 &req->rx_creg, size, async_set_reg_cb, req);
201 res = usb_submit_urb(async_urb, GFP_ATOMIC);
202 if (res) {
203 if (res == -ENODEV)
204 netif_device_detach(dev->netdev);
205 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
206 }
207 return res;
208}
209
210static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
211{
212 int i;
213 u8 data[3], tmp;
214
215 data[0] = phy;
216 data[1] = data[2] = 0;
217 tmp = indx | PHY_READ | PHY_GO;
218 i = 0;
219
220 set_registers(dev, PHYADD, sizeof(data), data);
221 set_registers(dev, PHYCNT, 1, &tmp);
222 do {
223 get_registers(dev, PHYCNT, 1, data);
224 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
225
226 if (i <= MII_TIMEOUT) {
227 get_registers(dev, PHYDAT, 2, data);
228 *reg = data[0] | (data[1] << 8);
229 return 0;
230 } else
231 return 1;
232}
233
234static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
235{
236 int i;
237 u8 data[3], tmp;
238
239 data[0] = phy;
240 data[1] = reg & 0xff;
241 data[2] = (reg >> 8) & 0xff;
242 tmp = indx | PHY_WRITE | PHY_GO;
243 i = 0;
244
245 set_registers(dev, PHYADD, sizeof(data), data);
246 set_registers(dev, PHYCNT, 1, &tmp);
247 do {
248 get_registers(dev, PHYCNT, 1, data);
249 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
250
251 if (i <= MII_TIMEOUT)
252 return 0;
253 else
254 return 1;
255}
256
257static void set_ethernet_addr(rtl8150_t *dev)
258{
259 u8 node_id[ETH_ALEN];
260 int ret;
261
262 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
263
264 if (!ret) {
265 eth_hw_addr_set(dev->netdev, node_id);
266 } else {
267 eth_hw_addr_random(dev->netdev);
268 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
269 dev->netdev->dev_addr);
270 }
271}
272
273static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
274{
275 struct sockaddr *addr = p;
276 rtl8150_t *dev = netdev_priv(netdev);
277
278 if (netif_running(netdev))
279 return -EBUSY;
280
281 eth_hw_addr_set(netdev, addr->sa_data);
282 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
283 /* Set the IDR registers. */
284 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
285#ifdef EEPROM_WRITE
286 {
287 int i;
288 u8 cr;
289 /* Get the CR contents. */
290 get_registers(dev, CR, 1, &cr);
291 /* Set the WEPROM bit (eeprom write enable). */
292 cr |= 0x20;
293 set_registers(dev, CR, 1, &cr);
294 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
295 so we need to split them up. */
296 for (i = 0; i * 2 < netdev->addr_len; i++) {
297 set_registers(dev, IDR_EEPROM + (i * 2), 2,
298 netdev->dev_addr + (i * 2));
299 }
300 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
301 cr &= 0xdf;
302 set_registers(dev, CR, 1, &cr);
303 }
304#endif
305 return 0;
306}
307
308static int rtl8150_reset(rtl8150_t * dev)
309{
310 u8 data = 0x10;
311 int i = HZ;
312
313 set_registers(dev, CR, 1, &data);
314 do {
315 get_registers(dev, CR, 1, &data);
316 } while ((data & 0x10) && --i);
317
318 return (i > 0) ? 1 : 0;
319}
320
321static int alloc_all_urbs(rtl8150_t * dev)
322{
323 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
324 if (!dev->rx_urb)
325 return 0;
326 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
327 if (!dev->tx_urb) {
328 usb_free_urb(dev->rx_urb);
329 return 0;
330 }
331 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
332 if (!dev->intr_urb) {
333 usb_free_urb(dev->rx_urb);
334 usb_free_urb(dev->tx_urb);
335 return 0;
336 }
337
338 return 1;
339}
340
341static void free_all_urbs(rtl8150_t * dev)
342{
343 usb_free_urb(dev->rx_urb);
344 usb_free_urb(dev->tx_urb);
345 usb_free_urb(dev->intr_urb);
346}
347
348static void unlink_all_urbs(rtl8150_t * dev)
349{
350 usb_kill_urb(dev->rx_urb);
351 usb_kill_urb(dev->tx_urb);
352 usb_kill_urb(dev->intr_urb);
353}
354
355static inline struct sk_buff *pull_skb(rtl8150_t *dev)
356{
357 struct sk_buff *skb;
358 int i;
359
360 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
361 if (dev->rx_skb_pool[i]) {
362 skb = dev->rx_skb_pool[i];
363 dev->rx_skb_pool[i] = NULL;
364 return skb;
365 }
366 }
367 return NULL;
368}
369
370static void read_bulk_callback(struct urb *urb)
371{
372 rtl8150_t *dev;
373 unsigned pkt_len, res;
374 struct sk_buff *skb;
375 struct net_device *netdev;
376 int status = urb->status;
377 int result;
378 unsigned long flags;
379
380 dev = urb->context;
381 if (!dev)
382 return;
383 if (test_bit(RTL8150_UNPLUG, &dev->flags))
384 return;
385 netdev = dev->netdev;
386 if (!netif_device_present(netdev))
387 return;
388
389 switch (status) {
390 case 0:
391 break;
392 case -ENOENT:
393 return; /* the urb is in unlink state */
394 case -ETIME:
395 if (printk_ratelimit())
396 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
397 goto goon;
398 default:
399 if (printk_ratelimit())
400 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
401 goto goon;
402 }
403
404 if (!dev->rx_skb)
405 goto resched;
406 /* protect against short packets (tell me why we got some?!?) */
407 if (urb->actual_length < 4)
408 goto goon;
409
410 res = urb->actual_length;
411 pkt_len = res - 4;
412
413 skb_put(dev->rx_skb, pkt_len);
414 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
415 netif_rx(dev->rx_skb);
416 netdev->stats.rx_packets++;
417 netdev->stats.rx_bytes += pkt_len;
418
419 spin_lock_irqsave(&dev->rx_pool_lock, flags);
420 skb = pull_skb(dev);
421 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
422 if (!skb)
423 goto resched;
424
425 dev->rx_skb = skb;
426goon:
427 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
428 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
429 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
430 if (result == -ENODEV)
431 netif_device_detach(dev->netdev);
432 else if (result) {
433 set_bit(RX_URB_FAIL, &dev->flags);
434 goto resched;
435 } else {
436 clear_bit(RX_URB_FAIL, &dev->flags);
437 }
438
439 return;
440resched:
441 tasklet_schedule(&dev->tl);
442}
443
444static void write_bulk_callback(struct urb *urb)
445{
446 rtl8150_t *dev;
447 int status = urb->status;
448
449 dev = urb->context;
450 if (!dev)
451 return;
452 dev_kfree_skb_irq(dev->tx_skb);
453 if (!netif_device_present(dev->netdev))
454 return;
455 if (status)
456 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
457 dev->netdev->name, status);
458 netif_trans_update(dev->netdev);
459 netif_wake_queue(dev->netdev);
460}
461
462static void intr_callback(struct urb *urb)
463{
464 rtl8150_t *dev;
465 __u8 *d;
466 int status = urb->status;
467 int res;
468
469 dev = urb->context;
470 if (!dev)
471 return;
472 switch (status) {
473 case 0: /* success */
474 break;
475 case -ECONNRESET: /* unlink */
476 case -ENOENT:
477 case -ESHUTDOWN:
478 return;
479 /* -EPIPE: should clear the halt */
480 default:
481 dev_info(&urb->dev->dev, "%s: intr status %d\n",
482 dev->netdev->name, status);
483 goto resubmit;
484 }
485
486 d = urb->transfer_buffer;
487 if (d[0] & TSR_ERRORS) {
488 dev->netdev->stats.tx_errors++;
489 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
490 dev->netdev->stats.tx_aborted_errors++;
491 if (d[INT_TSR] & TSR_LCOL)
492 dev->netdev->stats.tx_window_errors++;
493 if (d[INT_TSR] & TSR_LOSS_CRS)
494 dev->netdev->stats.tx_carrier_errors++;
495 }
496 /* Report link status changes to the network stack */
497 if ((d[INT_MSR] & MSR_LINK) == 0) {
498 if (netif_carrier_ok(dev->netdev)) {
499 netif_carrier_off(dev->netdev);
500 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
501 }
502 } else {
503 if (!netif_carrier_ok(dev->netdev)) {
504 netif_carrier_on(dev->netdev);
505 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
506 }
507 }
508
509resubmit:
510 res = usb_submit_urb (urb, GFP_ATOMIC);
511 if (res == -ENODEV)
512 netif_device_detach(dev->netdev);
513 else if (res)
514 dev_err(&dev->udev->dev,
515 "can't resubmit intr, %s-%s/input0, status %d\n",
516 dev->udev->bus->bus_name, dev->udev->devpath, res);
517}
518
519static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
520{
521 rtl8150_t *dev = usb_get_intfdata(intf);
522
523 netif_device_detach(dev->netdev);
524
525 if (netif_running(dev->netdev)) {
526 usb_kill_urb(dev->rx_urb);
527 usb_kill_urb(dev->intr_urb);
528 }
529 return 0;
530}
531
532static int rtl8150_resume(struct usb_interface *intf)
533{
534 rtl8150_t *dev = usb_get_intfdata(intf);
535
536 netif_device_attach(dev->netdev);
537 if (netif_running(dev->netdev)) {
538 dev->rx_urb->status = 0;
539 dev->rx_urb->actual_length = 0;
540 read_bulk_callback(dev->rx_urb);
541
542 dev->intr_urb->status = 0;
543 dev->intr_urb->actual_length = 0;
544 intr_callback(dev->intr_urb);
545 }
546 return 0;
547}
548
549/*
550**
551** network related part of the code
552**
553*/
554
555static void fill_skb_pool(rtl8150_t *dev)
556{
557 struct sk_buff *skb;
558 int i;
559
560 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
561 if (dev->rx_skb_pool[i])
562 continue;
563 skb = dev_alloc_skb(RTL8150_MTU + 2);
564 if (!skb) {
565 return;
566 }
567 skb_reserve(skb, 2);
568 dev->rx_skb_pool[i] = skb;
569 }
570}
571
572static void free_skb_pool(rtl8150_t *dev)
573{
574 int i;
575
576 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
577 dev_kfree_skb(dev->rx_skb_pool[i]);
578}
579
580static void rx_fixup(struct tasklet_struct *t)
581{
582 struct rtl8150 *dev = from_tasklet(dev, t, tl);
583 struct sk_buff *skb;
584 int status;
585
586 spin_lock_irq(&dev->rx_pool_lock);
587 fill_skb_pool(dev);
588 spin_unlock_irq(&dev->rx_pool_lock);
589 if (test_bit(RX_URB_FAIL, &dev->flags))
590 if (dev->rx_skb)
591 goto try_again;
592 spin_lock_irq(&dev->rx_pool_lock);
593 skb = pull_skb(dev);
594 spin_unlock_irq(&dev->rx_pool_lock);
595 if (skb == NULL)
596 goto tlsched;
597 dev->rx_skb = skb;
598 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
599 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
600try_again:
601 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
602 if (status == -ENODEV) {
603 netif_device_detach(dev->netdev);
604 } else if (status) {
605 set_bit(RX_URB_FAIL, &dev->flags);
606 goto tlsched;
607 } else {
608 clear_bit(RX_URB_FAIL, &dev->flags);
609 }
610
611 return;
612tlsched:
613 tasklet_schedule(&dev->tl);
614}
615
616static int enable_net_traffic(rtl8150_t * dev)
617{
618 u8 cr, tcr, rcr, msr;
619
620 if (!rtl8150_reset(dev)) {
621 dev_warn(&dev->udev->dev, "device reset failed\n");
622 }
623 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
624 rcr = 0x9e;
625 tcr = 0xd8;
626 cr = 0x0c;
627 if (!(rcr & 0x80))
628 set_bit(RTL8150_HW_CRC, &dev->flags);
629 set_registers(dev, RCR, 1, &rcr);
630 set_registers(dev, TCR, 1, &tcr);
631 set_registers(dev, CR, 1, &cr);
632 get_registers(dev, MSR, 1, &msr);
633
634 return 0;
635}
636
637static void disable_net_traffic(rtl8150_t * dev)
638{
639 u8 cr;
640
641 get_registers(dev, CR, 1, &cr);
642 cr &= 0xf3;
643 set_registers(dev, CR, 1, &cr);
644}
645
646static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
647{
648 rtl8150_t *dev = netdev_priv(netdev);
649 dev_warn(&netdev->dev, "Tx timeout.\n");
650 usb_unlink_urb(dev->tx_urb);
651 netdev->stats.tx_errors++;
652}
653
654static void rtl8150_set_multicast(struct net_device *netdev)
655{
656 rtl8150_t *dev = netdev_priv(netdev);
657 u16 rx_creg = 0x9e;
658
659 netif_stop_queue(netdev);
660 if (netdev->flags & IFF_PROMISC) {
661 rx_creg |= 0x0001;
662 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
663 } else if (!netdev_mc_empty(netdev) ||
664 (netdev->flags & IFF_ALLMULTI)) {
665 rx_creg &= 0xfffe;
666 rx_creg |= 0x0002;
667 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
668 } else {
669 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
670 rx_creg &= 0x00fc;
671 }
672 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
673 netif_wake_queue(netdev);
674}
675
676static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
677 struct net_device *netdev)
678{
679 rtl8150_t *dev = netdev_priv(netdev);
680 int count, res;
681
682 netif_stop_queue(netdev);
683 count = (skb->len < 60) ? 60 : skb->len;
684 count = (count & 0x3f) ? count : count + 1;
685 dev->tx_skb = skb;
686 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
687 skb->data, count, write_bulk_callback, dev);
688 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
689 /* Can we get/handle EPIPE here? */
690 if (res == -ENODEV)
691 netif_device_detach(dev->netdev);
692 else {
693 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
694 netdev->stats.tx_errors++;
695 netif_start_queue(netdev);
696 }
697 } else {
698 netdev->stats.tx_packets++;
699 netdev->stats.tx_bytes += skb->len;
700 netif_trans_update(netdev);
701 }
702
703 return NETDEV_TX_OK;
704}
705
706
707static void set_carrier(struct net_device *netdev)
708{
709 rtl8150_t *dev = netdev_priv(netdev);
710 short tmp;
711
712 get_registers(dev, CSCR, 2, &tmp);
713 if (tmp & CSCR_LINK_STATUS)
714 netif_carrier_on(netdev);
715 else
716 netif_carrier_off(netdev);
717}
718
719static int rtl8150_open(struct net_device *netdev)
720{
721 rtl8150_t *dev = netdev_priv(netdev);
722 int res;
723
724 if (dev->rx_skb == NULL)
725 dev->rx_skb = pull_skb(dev);
726 if (!dev->rx_skb)
727 return -ENOMEM;
728
729 set_registers(dev, IDR, 6, netdev->dev_addr);
730
731 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
732 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
733 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
734 if (res == -ENODEV)
735 netif_device_detach(dev->netdev);
736 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
737 return res;
738 }
739 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
740 dev->intr_buff, INTBUFSIZE, intr_callback,
741 dev, dev->intr_interval);
742 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
743 if (res == -ENODEV)
744 netif_device_detach(dev->netdev);
745 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
746 usb_kill_urb(dev->rx_urb);
747 return res;
748 }
749 enable_net_traffic(dev);
750 set_carrier(netdev);
751 netif_start_queue(netdev);
752
753 return res;
754}
755
756static int rtl8150_close(struct net_device *netdev)
757{
758 rtl8150_t *dev = netdev_priv(netdev);
759
760 netif_stop_queue(netdev);
761 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
762 disable_net_traffic(dev);
763 unlink_all_urbs(dev);
764
765 return 0;
766}
767
768static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
769{
770 rtl8150_t *dev = netdev_priv(netdev);
771
772 strscpy(info->driver, driver_name, sizeof(info->driver));
773 strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
774 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
775}
776
777static int rtl8150_get_link_ksettings(struct net_device *netdev,
778 struct ethtool_link_ksettings *ecmd)
779{
780 rtl8150_t *dev = netdev_priv(netdev);
781 short lpa, bmcr;
782 u32 supported;
783
784 supported = (SUPPORTED_10baseT_Half |
785 SUPPORTED_10baseT_Full |
786 SUPPORTED_100baseT_Half |
787 SUPPORTED_100baseT_Full |
788 SUPPORTED_Autoneg |
789 SUPPORTED_TP | SUPPORTED_MII);
790 ecmd->base.port = PORT_TP;
791 ecmd->base.phy_address = dev->phy;
792 get_registers(dev, BMCR, 2, &bmcr);
793 get_registers(dev, ANLP, 2, &lpa);
794 if (bmcr & BMCR_ANENABLE) {
795 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
796 SPEED_100 : SPEED_10);
797 ecmd->base.speed = speed;
798 ecmd->base.autoneg = AUTONEG_ENABLE;
799 if (speed == SPEED_100)
800 ecmd->base.duplex = (lpa & LPA_100FULL) ?
801 DUPLEX_FULL : DUPLEX_HALF;
802 else
803 ecmd->base.duplex = (lpa & LPA_10FULL) ?
804 DUPLEX_FULL : DUPLEX_HALF;
805 } else {
806 ecmd->base.autoneg = AUTONEG_DISABLE;
807 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
808 SPEED_100 : SPEED_10);
809 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
810 DUPLEX_FULL : DUPLEX_HALF;
811 }
812
813 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
814 supported);
815
816 return 0;
817}
818
819static const struct ethtool_ops ops = {
820 .get_drvinfo = rtl8150_get_drvinfo,
821 .get_link = ethtool_op_get_link,
822 .get_link_ksettings = rtl8150_get_link_ksettings,
823};
824
825static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
826 void __user *udata, int cmd)
827{
828 rtl8150_t *dev = netdev_priv(netdev);
829 u16 *data = (u16 *) & rq->ifr_ifru;
830 int res = 0;
831
832 switch (cmd) {
833 case SIOCDEVPRIVATE:
834 data[0] = dev->phy;
835 fallthrough;
836 case SIOCDEVPRIVATE + 1:
837 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
838 break;
839 case SIOCDEVPRIVATE + 2:
840 if (!capable(CAP_NET_ADMIN))
841 return -EPERM;
842 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
843 break;
844 default:
845 res = -EOPNOTSUPP;
846 }
847
848 return res;
849}
850
851static const struct net_device_ops rtl8150_netdev_ops = {
852 .ndo_open = rtl8150_open,
853 .ndo_stop = rtl8150_close,
854 .ndo_siocdevprivate = rtl8150_siocdevprivate,
855 .ndo_start_xmit = rtl8150_start_xmit,
856 .ndo_tx_timeout = rtl8150_tx_timeout,
857 .ndo_set_rx_mode = rtl8150_set_multicast,
858 .ndo_set_mac_address = rtl8150_set_mac_address,
859
860 .ndo_validate_addr = eth_validate_addr,
861};
862
863static int rtl8150_probe(struct usb_interface *intf,
864 const struct usb_device_id *id)
865{
866 struct usb_device *udev = interface_to_usbdev(intf);
867 rtl8150_t *dev;
868 struct net_device *netdev;
869
870 netdev = alloc_etherdev(sizeof(rtl8150_t));
871 if (!netdev)
872 return -ENOMEM;
873
874 dev = netdev_priv(netdev);
875
876 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
877 if (!dev->intr_buff) {
878 free_netdev(netdev);
879 return -ENOMEM;
880 }
881
882 tasklet_setup(&dev->tl, rx_fixup);
883 spin_lock_init(&dev->rx_pool_lock);
884
885 dev->udev = udev;
886 dev->netdev = netdev;
887 netdev->netdev_ops = &rtl8150_netdev_ops;
888 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
889 netdev->ethtool_ops = &ops;
890 dev->intr_interval = 100; /* 100ms */
891
892 if (!alloc_all_urbs(dev)) {
893 dev_err(&intf->dev, "out of memory\n");
894 goto out;
895 }
896 if (!rtl8150_reset(dev)) {
897 dev_err(&intf->dev, "couldn't reset the device\n");
898 goto out1;
899 }
900 fill_skb_pool(dev);
901 set_ethernet_addr(dev);
902
903 usb_set_intfdata(intf, dev);
904 SET_NETDEV_DEV(netdev, &intf->dev);
905 if (register_netdev(netdev) != 0) {
906 dev_err(&intf->dev, "couldn't register the device\n");
907 goto out2;
908 }
909
910 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
911
912 return 0;
913
914out2:
915 usb_set_intfdata(intf, NULL);
916 free_skb_pool(dev);
917out1:
918 free_all_urbs(dev);
919out:
920 kfree(dev->intr_buff);
921 free_netdev(netdev);
922 return -EIO;
923}
924
925static void rtl8150_disconnect(struct usb_interface *intf)
926{
927 rtl8150_t *dev = usb_get_intfdata(intf);
928
929 usb_set_intfdata(intf, NULL);
930 if (dev) {
931 set_bit(RTL8150_UNPLUG, &dev->flags);
932 tasklet_kill(&dev->tl);
933 unregister_netdev(dev->netdev);
934 unlink_all_urbs(dev);
935 free_all_urbs(dev);
936 free_skb_pool(dev);
937 dev_kfree_skb(dev->rx_skb);
938 kfree(dev->intr_buff);
939 free_netdev(dev->netdev);
940 }
941}
942
943static struct usb_driver rtl8150_driver = {
944 .name = driver_name,
945 .probe = rtl8150_probe,
946 .disconnect = rtl8150_disconnect,
947 .id_table = rtl8150_table,
948 .suspend = rtl8150_suspend,
949 .resume = rtl8150_resume,
950 .disable_hub_initiated_lpm = 1,
951};
952
953module_usb_driver(rtl8150_driver);
954
955MODULE_AUTHOR(DRIVER_AUTHOR);
956MODULE_DESCRIPTION(DRIVER_DESC);
957MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
4 */
5
6#include <linux/signal.h>
7#include <linux/slab.h>
8#include <linux/module.h>
9#include <linux/netdevice.h>
10#include <linux/etherdevice.h>
11#include <linux/mii.h>
12#include <linux/ethtool.h>
13#include <linux/usb.h>
14#include <linux/uaccess.h>
15
16/* Version Information */
17#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
18#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
19#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
20
21#define IDR 0x0120
22#define MAR 0x0126
23#define CR 0x012e
24#define TCR 0x012f
25#define RCR 0x0130
26#define TSR 0x0132
27#define RSR 0x0133
28#define CON0 0x0135
29#define CON1 0x0136
30#define MSR 0x0137
31#define PHYADD 0x0138
32#define PHYDAT 0x0139
33#define PHYCNT 0x013b
34#define GPPC 0x013d
35#define BMCR 0x0140
36#define BMSR 0x0142
37#define ANAR 0x0144
38#define ANLP 0x0146
39#define AER 0x0148
40#define CSCR 0x014C /* This one has the link status */
41#define CSCR_LINK_STATUS (1 << 3)
42
43#define IDR_EEPROM 0x1202
44
45#define PHY_READ 0
46#define PHY_WRITE 0x20
47#define PHY_GO 0x40
48
49#define MII_TIMEOUT 10
50#define INTBUFSIZE 8
51
52#define RTL8150_REQT_READ 0xc0
53#define RTL8150_REQT_WRITE 0x40
54#define RTL8150_REQ_GET_REGS 0x05
55#define RTL8150_REQ_SET_REGS 0x05
56
57
58/* Transmit status register errors */
59#define TSR_ECOL (1<<5)
60#define TSR_LCOL (1<<4)
61#define TSR_LOSS_CRS (1<<3)
62#define TSR_JBR (1<<2)
63#define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
64/* Receive status register errors */
65#define RSR_CRC (1<<2)
66#define RSR_FAE (1<<1)
67#define RSR_ERRORS (RSR_CRC | RSR_FAE)
68
69/* Media status register definitions */
70#define MSR_DUPLEX (1<<4)
71#define MSR_SPEED (1<<3)
72#define MSR_LINK (1<<2)
73
74/* Interrupt pipe data */
75#define INT_TSR 0x00
76#define INT_RSR 0x01
77#define INT_MSR 0x02
78#define INT_WAKSR 0x03
79#define INT_TXOK_CNT 0x04
80#define INT_RXLOST_CNT 0x05
81#define INT_CRERR_CNT 0x06
82#define INT_COL_CNT 0x07
83
84
85#define RTL8150_MTU 1540
86#define RTL8150_TX_TIMEOUT (HZ)
87#define RX_SKB_POOL_SIZE 4
88
89/* rtl8150 flags */
90#define RTL8150_HW_CRC 0
91#define RX_REG_SET 1
92#define RTL8150_UNPLUG 2
93#define RX_URB_FAIL 3
94
95/* Define these values to match your device */
96#define VENDOR_ID_REALTEK 0x0bda
97#define VENDOR_ID_MELCO 0x0411
98#define VENDOR_ID_MICRONET 0x3980
99#define VENDOR_ID_LONGSHINE 0x07b8
100#define VENDOR_ID_OQO 0x1557
101#define VENDOR_ID_ZYXEL 0x0586
102
103#define PRODUCT_ID_RTL8150 0x8150
104#define PRODUCT_ID_LUAKTX 0x0012
105#define PRODUCT_ID_LCS8138TX 0x401a
106#define PRODUCT_ID_SP128AR 0x0003
107#define PRODUCT_ID_PRESTIGE 0x401a
108
109#undef EEPROM_WRITE
110
111/* table of devices that work with this driver */
112static const struct usb_device_id rtl8150_table[] = {
113 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
114 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
115 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
116 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
117 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
118 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
119 {}
120};
121
122MODULE_DEVICE_TABLE(usb, rtl8150_table);
123
124struct rtl8150 {
125 unsigned long flags;
126 struct usb_device *udev;
127 struct tasklet_struct tl;
128 struct net_device *netdev;
129 struct urb *rx_urb, *tx_urb, *intr_urb;
130 struct sk_buff *tx_skb, *rx_skb;
131 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
132 spinlock_t rx_pool_lock;
133 struct usb_ctrlrequest dr;
134 int intr_interval;
135 u8 *intr_buff;
136 u8 phy;
137};
138
139typedef struct rtl8150 rtl8150_t;
140
141struct async_req {
142 struct usb_ctrlrequest dr;
143 u16 rx_creg;
144};
145
146static const char driver_name [] = "rtl8150";
147
148/*
149**
150** device related part of the code
151**
152*/
153static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
154{
155 void *buf;
156 int ret;
157
158 buf = kmalloc(size, GFP_NOIO);
159 if (!buf)
160 return -ENOMEM;
161
162 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
163 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
164 indx, 0, buf, size, 500);
165 if (ret > 0 && ret <= size)
166 memcpy(data, buf, ret);
167 kfree(buf);
168 return ret;
169}
170
171static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
172{
173 void *buf;
174 int ret;
175
176 buf = kmemdup(data, size, GFP_NOIO);
177 if (!buf)
178 return -ENOMEM;
179
180 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
181 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
182 indx, 0, buf, size, 500);
183 kfree(buf);
184 return ret;
185}
186
187static void async_set_reg_cb(struct urb *urb)
188{
189 struct async_req *req = (struct async_req *)urb->context;
190 int status = urb->status;
191
192 if (status < 0)
193 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
194 kfree(req);
195 usb_free_urb(urb);
196}
197
198static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
199{
200 int res = -ENOMEM;
201 struct urb *async_urb;
202 struct async_req *req;
203
204 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
205 if (req == NULL)
206 return res;
207 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
208 if (async_urb == NULL) {
209 kfree(req);
210 return res;
211 }
212 req->rx_creg = cpu_to_le16(reg);
213 req->dr.bRequestType = RTL8150_REQT_WRITE;
214 req->dr.bRequest = RTL8150_REQ_SET_REGS;
215 req->dr.wIndex = 0;
216 req->dr.wValue = cpu_to_le16(indx);
217 req->dr.wLength = cpu_to_le16(size);
218 usb_fill_control_urb(async_urb, dev->udev,
219 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
220 &req->rx_creg, size, async_set_reg_cb, req);
221 res = usb_submit_urb(async_urb, GFP_ATOMIC);
222 if (res) {
223 if (res == -ENODEV)
224 netif_device_detach(dev->netdev);
225 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
226 }
227 return res;
228}
229
230static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
231{
232 int i;
233 u8 data[3], tmp;
234
235 data[0] = phy;
236 data[1] = data[2] = 0;
237 tmp = indx | PHY_READ | PHY_GO;
238 i = 0;
239
240 set_registers(dev, PHYADD, sizeof(data), data);
241 set_registers(dev, PHYCNT, 1, &tmp);
242 do {
243 get_registers(dev, PHYCNT, 1, data);
244 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
245
246 if (i <= MII_TIMEOUT) {
247 get_registers(dev, PHYDAT, 2, data);
248 *reg = data[0] | (data[1] << 8);
249 return 0;
250 } else
251 return 1;
252}
253
254static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
255{
256 int i;
257 u8 data[3], tmp;
258
259 data[0] = phy;
260 data[1] = reg & 0xff;
261 data[2] = (reg >> 8) & 0xff;
262 tmp = indx | PHY_WRITE | PHY_GO;
263 i = 0;
264
265 set_registers(dev, PHYADD, sizeof(data), data);
266 set_registers(dev, PHYCNT, 1, &tmp);
267 do {
268 get_registers(dev, PHYCNT, 1, data);
269 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
270
271 if (i <= MII_TIMEOUT)
272 return 0;
273 else
274 return 1;
275}
276
277static void set_ethernet_addr(rtl8150_t *dev)
278{
279 u8 node_id[ETH_ALEN];
280 int ret;
281
282 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
283
284 if (ret == sizeof(node_id)) {
285 ether_addr_copy(dev->netdev->dev_addr, node_id);
286 } else {
287 eth_hw_addr_random(dev->netdev);
288 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
289 dev->netdev->dev_addr);
290 }
291}
292
293static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
294{
295 struct sockaddr *addr = p;
296 rtl8150_t *dev = netdev_priv(netdev);
297
298 if (netif_running(netdev))
299 return -EBUSY;
300
301 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
302 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
303 /* Set the IDR registers. */
304 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
305#ifdef EEPROM_WRITE
306 {
307 int i;
308 u8 cr;
309 /* Get the CR contents. */
310 get_registers(dev, CR, 1, &cr);
311 /* Set the WEPROM bit (eeprom write enable). */
312 cr |= 0x20;
313 set_registers(dev, CR, 1, &cr);
314 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
315 so we need to split them up. */
316 for (i = 0; i * 2 < netdev->addr_len; i++) {
317 set_registers(dev, IDR_EEPROM + (i * 2), 2,
318 netdev->dev_addr + (i * 2));
319 }
320 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
321 cr &= 0xdf;
322 set_registers(dev, CR, 1, &cr);
323 }
324#endif
325 return 0;
326}
327
328static int rtl8150_reset(rtl8150_t * dev)
329{
330 u8 data = 0x10;
331 int i = HZ;
332
333 set_registers(dev, CR, 1, &data);
334 do {
335 get_registers(dev, CR, 1, &data);
336 } while ((data & 0x10) && --i);
337
338 return (i > 0) ? 1 : 0;
339}
340
341static int alloc_all_urbs(rtl8150_t * dev)
342{
343 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
344 if (!dev->rx_urb)
345 return 0;
346 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
347 if (!dev->tx_urb) {
348 usb_free_urb(dev->rx_urb);
349 return 0;
350 }
351 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
352 if (!dev->intr_urb) {
353 usb_free_urb(dev->rx_urb);
354 usb_free_urb(dev->tx_urb);
355 return 0;
356 }
357
358 return 1;
359}
360
361static void free_all_urbs(rtl8150_t * dev)
362{
363 usb_free_urb(dev->rx_urb);
364 usb_free_urb(dev->tx_urb);
365 usb_free_urb(dev->intr_urb);
366}
367
368static void unlink_all_urbs(rtl8150_t * dev)
369{
370 usb_kill_urb(dev->rx_urb);
371 usb_kill_urb(dev->tx_urb);
372 usb_kill_urb(dev->intr_urb);
373}
374
375static inline struct sk_buff *pull_skb(rtl8150_t *dev)
376{
377 struct sk_buff *skb;
378 int i;
379
380 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
381 if (dev->rx_skb_pool[i]) {
382 skb = dev->rx_skb_pool[i];
383 dev->rx_skb_pool[i] = NULL;
384 return skb;
385 }
386 }
387 return NULL;
388}
389
390static void read_bulk_callback(struct urb *urb)
391{
392 rtl8150_t *dev;
393 unsigned pkt_len, res;
394 struct sk_buff *skb;
395 struct net_device *netdev;
396 int status = urb->status;
397 int result;
398 unsigned long flags;
399
400 dev = urb->context;
401 if (!dev)
402 return;
403 if (test_bit(RTL8150_UNPLUG, &dev->flags))
404 return;
405 netdev = dev->netdev;
406 if (!netif_device_present(netdev))
407 return;
408
409 switch (status) {
410 case 0:
411 break;
412 case -ENOENT:
413 return; /* the urb is in unlink state */
414 case -ETIME:
415 if (printk_ratelimit())
416 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
417 goto goon;
418 default:
419 if (printk_ratelimit())
420 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
421 goto goon;
422 }
423
424 if (!dev->rx_skb)
425 goto resched;
426 /* protect against short packets (tell me why we got some?!?) */
427 if (urb->actual_length < 4)
428 goto goon;
429
430 res = urb->actual_length;
431 pkt_len = res - 4;
432
433 skb_put(dev->rx_skb, pkt_len);
434 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
435 netif_rx(dev->rx_skb);
436 netdev->stats.rx_packets++;
437 netdev->stats.rx_bytes += pkt_len;
438
439 spin_lock_irqsave(&dev->rx_pool_lock, flags);
440 skb = pull_skb(dev);
441 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
442 if (!skb)
443 goto resched;
444
445 dev->rx_skb = skb;
446goon:
447 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
448 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
449 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
450 if (result == -ENODEV)
451 netif_device_detach(dev->netdev);
452 else if (result) {
453 set_bit(RX_URB_FAIL, &dev->flags);
454 goto resched;
455 } else {
456 clear_bit(RX_URB_FAIL, &dev->flags);
457 }
458
459 return;
460resched:
461 tasklet_schedule(&dev->tl);
462}
463
464static void write_bulk_callback(struct urb *urb)
465{
466 rtl8150_t *dev;
467 int status = urb->status;
468
469 dev = urb->context;
470 if (!dev)
471 return;
472 dev_kfree_skb_irq(dev->tx_skb);
473 if (!netif_device_present(dev->netdev))
474 return;
475 if (status)
476 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
477 dev->netdev->name, status);
478 netif_trans_update(dev->netdev);
479 netif_wake_queue(dev->netdev);
480}
481
482static void intr_callback(struct urb *urb)
483{
484 rtl8150_t *dev;
485 __u8 *d;
486 int status = urb->status;
487 int res;
488
489 dev = urb->context;
490 if (!dev)
491 return;
492 switch (status) {
493 case 0: /* success */
494 break;
495 case -ECONNRESET: /* unlink */
496 case -ENOENT:
497 case -ESHUTDOWN:
498 return;
499 /* -EPIPE: should clear the halt */
500 default:
501 dev_info(&urb->dev->dev, "%s: intr status %d\n",
502 dev->netdev->name, status);
503 goto resubmit;
504 }
505
506 d = urb->transfer_buffer;
507 if (d[0] & TSR_ERRORS) {
508 dev->netdev->stats.tx_errors++;
509 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
510 dev->netdev->stats.tx_aborted_errors++;
511 if (d[INT_TSR] & TSR_LCOL)
512 dev->netdev->stats.tx_window_errors++;
513 if (d[INT_TSR] & TSR_LOSS_CRS)
514 dev->netdev->stats.tx_carrier_errors++;
515 }
516 /* Report link status changes to the network stack */
517 if ((d[INT_MSR] & MSR_LINK) == 0) {
518 if (netif_carrier_ok(dev->netdev)) {
519 netif_carrier_off(dev->netdev);
520 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
521 }
522 } else {
523 if (!netif_carrier_ok(dev->netdev)) {
524 netif_carrier_on(dev->netdev);
525 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
526 }
527 }
528
529resubmit:
530 res = usb_submit_urb (urb, GFP_ATOMIC);
531 if (res == -ENODEV)
532 netif_device_detach(dev->netdev);
533 else if (res)
534 dev_err(&dev->udev->dev,
535 "can't resubmit intr, %s-%s/input0, status %d\n",
536 dev->udev->bus->bus_name, dev->udev->devpath, res);
537}
538
539static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
540{
541 rtl8150_t *dev = usb_get_intfdata(intf);
542
543 netif_device_detach(dev->netdev);
544
545 if (netif_running(dev->netdev)) {
546 usb_kill_urb(dev->rx_urb);
547 usb_kill_urb(dev->intr_urb);
548 }
549 return 0;
550}
551
552static int rtl8150_resume(struct usb_interface *intf)
553{
554 rtl8150_t *dev = usb_get_intfdata(intf);
555
556 netif_device_attach(dev->netdev);
557 if (netif_running(dev->netdev)) {
558 dev->rx_urb->status = 0;
559 dev->rx_urb->actual_length = 0;
560 read_bulk_callback(dev->rx_urb);
561
562 dev->intr_urb->status = 0;
563 dev->intr_urb->actual_length = 0;
564 intr_callback(dev->intr_urb);
565 }
566 return 0;
567}
568
569/*
570**
571** network related part of the code
572**
573*/
574
575static void fill_skb_pool(rtl8150_t *dev)
576{
577 struct sk_buff *skb;
578 int i;
579
580 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
581 if (dev->rx_skb_pool[i])
582 continue;
583 skb = dev_alloc_skb(RTL8150_MTU + 2);
584 if (!skb) {
585 return;
586 }
587 skb_reserve(skb, 2);
588 dev->rx_skb_pool[i] = skb;
589 }
590}
591
592static void free_skb_pool(rtl8150_t *dev)
593{
594 int i;
595
596 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
597 dev_kfree_skb(dev->rx_skb_pool[i]);
598}
599
600static void rx_fixup(unsigned long data)
601{
602 struct rtl8150 *dev = (struct rtl8150 *)data;
603 struct sk_buff *skb;
604 int status;
605
606 spin_lock_irq(&dev->rx_pool_lock);
607 fill_skb_pool(dev);
608 spin_unlock_irq(&dev->rx_pool_lock);
609 if (test_bit(RX_URB_FAIL, &dev->flags))
610 if (dev->rx_skb)
611 goto try_again;
612 spin_lock_irq(&dev->rx_pool_lock);
613 skb = pull_skb(dev);
614 spin_unlock_irq(&dev->rx_pool_lock);
615 if (skb == NULL)
616 goto tlsched;
617 dev->rx_skb = skb;
618 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
619 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
620try_again:
621 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
622 if (status == -ENODEV) {
623 netif_device_detach(dev->netdev);
624 } else if (status) {
625 set_bit(RX_URB_FAIL, &dev->flags);
626 goto tlsched;
627 } else {
628 clear_bit(RX_URB_FAIL, &dev->flags);
629 }
630
631 return;
632tlsched:
633 tasklet_schedule(&dev->tl);
634}
635
636static int enable_net_traffic(rtl8150_t * dev)
637{
638 u8 cr, tcr, rcr, msr;
639
640 if (!rtl8150_reset(dev)) {
641 dev_warn(&dev->udev->dev, "device reset failed\n");
642 }
643 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
644 rcr = 0x9e;
645 tcr = 0xd8;
646 cr = 0x0c;
647 if (!(rcr & 0x80))
648 set_bit(RTL8150_HW_CRC, &dev->flags);
649 set_registers(dev, RCR, 1, &rcr);
650 set_registers(dev, TCR, 1, &tcr);
651 set_registers(dev, CR, 1, &cr);
652 get_registers(dev, MSR, 1, &msr);
653
654 return 0;
655}
656
657static void disable_net_traffic(rtl8150_t * dev)
658{
659 u8 cr;
660
661 get_registers(dev, CR, 1, &cr);
662 cr &= 0xf3;
663 set_registers(dev, CR, 1, &cr);
664}
665
666static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
667{
668 rtl8150_t *dev = netdev_priv(netdev);
669 dev_warn(&netdev->dev, "Tx timeout.\n");
670 usb_unlink_urb(dev->tx_urb);
671 netdev->stats.tx_errors++;
672}
673
674static void rtl8150_set_multicast(struct net_device *netdev)
675{
676 rtl8150_t *dev = netdev_priv(netdev);
677 u16 rx_creg = 0x9e;
678
679 netif_stop_queue(netdev);
680 if (netdev->flags & IFF_PROMISC) {
681 rx_creg |= 0x0001;
682 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
683 } else if (!netdev_mc_empty(netdev) ||
684 (netdev->flags & IFF_ALLMULTI)) {
685 rx_creg &= 0xfffe;
686 rx_creg |= 0x0002;
687 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
688 } else {
689 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
690 rx_creg &= 0x00fc;
691 }
692 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
693 netif_wake_queue(netdev);
694}
695
696static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
697 struct net_device *netdev)
698{
699 rtl8150_t *dev = netdev_priv(netdev);
700 int count, res;
701
702 netif_stop_queue(netdev);
703 count = (skb->len < 60) ? 60 : skb->len;
704 count = (count & 0x3f) ? count : count + 1;
705 dev->tx_skb = skb;
706 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
707 skb->data, count, write_bulk_callback, dev);
708 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
709 /* Can we get/handle EPIPE here? */
710 if (res == -ENODEV)
711 netif_device_detach(dev->netdev);
712 else {
713 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
714 netdev->stats.tx_errors++;
715 netif_start_queue(netdev);
716 }
717 } else {
718 netdev->stats.tx_packets++;
719 netdev->stats.tx_bytes += skb->len;
720 netif_trans_update(netdev);
721 }
722
723 return NETDEV_TX_OK;
724}
725
726
727static void set_carrier(struct net_device *netdev)
728{
729 rtl8150_t *dev = netdev_priv(netdev);
730 short tmp;
731
732 get_registers(dev, CSCR, 2, &tmp);
733 if (tmp & CSCR_LINK_STATUS)
734 netif_carrier_on(netdev);
735 else
736 netif_carrier_off(netdev);
737}
738
739static int rtl8150_open(struct net_device *netdev)
740{
741 rtl8150_t *dev = netdev_priv(netdev);
742 int res;
743
744 if (dev->rx_skb == NULL)
745 dev->rx_skb = pull_skb(dev);
746 if (!dev->rx_skb)
747 return -ENOMEM;
748
749 set_registers(dev, IDR, 6, netdev->dev_addr);
750
751 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
752 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
753 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
754 if (res == -ENODEV)
755 netif_device_detach(dev->netdev);
756 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
757 return res;
758 }
759 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
760 dev->intr_buff, INTBUFSIZE, intr_callback,
761 dev, dev->intr_interval);
762 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
763 if (res == -ENODEV)
764 netif_device_detach(dev->netdev);
765 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
766 usb_kill_urb(dev->rx_urb);
767 return res;
768 }
769 enable_net_traffic(dev);
770 set_carrier(netdev);
771 netif_start_queue(netdev);
772
773 return res;
774}
775
776static int rtl8150_close(struct net_device *netdev)
777{
778 rtl8150_t *dev = netdev_priv(netdev);
779
780 netif_stop_queue(netdev);
781 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
782 disable_net_traffic(dev);
783 unlink_all_urbs(dev);
784
785 return 0;
786}
787
788static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
789{
790 rtl8150_t *dev = netdev_priv(netdev);
791
792 strlcpy(info->driver, driver_name, sizeof(info->driver));
793 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
794 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
795}
796
797static int rtl8150_get_link_ksettings(struct net_device *netdev,
798 struct ethtool_link_ksettings *ecmd)
799{
800 rtl8150_t *dev = netdev_priv(netdev);
801 short lpa, bmcr;
802 u32 supported;
803
804 supported = (SUPPORTED_10baseT_Half |
805 SUPPORTED_10baseT_Full |
806 SUPPORTED_100baseT_Half |
807 SUPPORTED_100baseT_Full |
808 SUPPORTED_Autoneg |
809 SUPPORTED_TP | SUPPORTED_MII);
810 ecmd->base.port = PORT_TP;
811 ecmd->base.phy_address = dev->phy;
812 get_registers(dev, BMCR, 2, &bmcr);
813 get_registers(dev, ANLP, 2, &lpa);
814 if (bmcr & BMCR_ANENABLE) {
815 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
816 SPEED_100 : SPEED_10);
817 ecmd->base.speed = speed;
818 ecmd->base.autoneg = AUTONEG_ENABLE;
819 if (speed == SPEED_100)
820 ecmd->base.duplex = (lpa & LPA_100FULL) ?
821 DUPLEX_FULL : DUPLEX_HALF;
822 else
823 ecmd->base.duplex = (lpa & LPA_10FULL) ?
824 DUPLEX_FULL : DUPLEX_HALF;
825 } else {
826 ecmd->base.autoneg = AUTONEG_DISABLE;
827 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
828 SPEED_100 : SPEED_10);
829 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
830 DUPLEX_FULL : DUPLEX_HALF;
831 }
832
833 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
834 supported);
835
836 return 0;
837}
838
839static const struct ethtool_ops ops = {
840 .get_drvinfo = rtl8150_get_drvinfo,
841 .get_link = ethtool_op_get_link,
842 .get_link_ksettings = rtl8150_get_link_ksettings,
843};
844
845static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
846{
847 rtl8150_t *dev = netdev_priv(netdev);
848 u16 *data = (u16 *) & rq->ifr_ifru;
849 int res = 0;
850
851 switch (cmd) {
852 case SIOCDEVPRIVATE:
853 data[0] = dev->phy;
854 fallthrough;
855 case SIOCDEVPRIVATE + 1:
856 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
857 break;
858 case SIOCDEVPRIVATE + 2:
859 if (!capable(CAP_NET_ADMIN))
860 return -EPERM;
861 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
862 break;
863 default:
864 res = -EOPNOTSUPP;
865 }
866
867 return res;
868}
869
870static const struct net_device_ops rtl8150_netdev_ops = {
871 .ndo_open = rtl8150_open,
872 .ndo_stop = rtl8150_close,
873 .ndo_do_ioctl = rtl8150_ioctl,
874 .ndo_start_xmit = rtl8150_start_xmit,
875 .ndo_tx_timeout = rtl8150_tx_timeout,
876 .ndo_set_rx_mode = rtl8150_set_multicast,
877 .ndo_set_mac_address = rtl8150_set_mac_address,
878
879 .ndo_validate_addr = eth_validate_addr,
880};
881
882static int rtl8150_probe(struct usb_interface *intf,
883 const struct usb_device_id *id)
884{
885 struct usb_device *udev = interface_to_usbdev(intf);
886 rtl8150_t *dev;
887 struct net_device *netdev;
888
889 netdev = alloc_etherdev(sizeof(rtl8150_t));
890 if (!netdev)
891 return -ENOMEM;
892
893 dev = netdev_priv(netdev);
894
895 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
896 if (!dev->intr_buff) {
897 free_netdev(netdev);
898 return -ENOMEM;
899 }
900
901 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
902 spin_lock_init(&dev->rx_pool_lock);
903
904 dev->udev = udev;
905 dev->netdev = netdev;
906 netdev->netdev_ops = &rtl8150_netdev_ops;
907 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
908 netdev->ethtool_ops = &ops;
909 dev->intr_interval = 100; /* 100ms */
910
911 if (!alloc_all_urbs(dev)) {
912 dev_err(&intf->dev, "out of memory\n");
913 goto out;
914 }
915 if (!rtl8150_reset(dev)) {
916 dev_err(&intf->dev, "couldn't reset the device\n");
917 goto out1;
918 }
919 fill_skb_pool(dev);
920 set_ethernet_addr(dev);
921
922 usb_set_intfdata(intf, dev);
923 SET_NETDEV_DEV(netdev, &intf->dev);
924 if (register_netdev(netdev) != 0) {
925 dev_err(&intf->dev, "couldn't register the device\n");
926 goto out2;
927 }
928
929 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
930
931 return 0;
932
933out2:
934 usb_set_intfdata(intf, NULL);
935 free_skb_pool(dev);
936out1:
937 free_all_urbs(dev);
938out:
939 kfree(dev->intr_buff);
940 free_netdev(netdev);
941 return -EIO;
942}
943
944static void rtl8150_disconnect(struct usb_interface *intf)
945{
946 rtl8150_t *dev = usb_get_intfdata(intf);
947
948 usb_set_intfdata(intf, NULL);
949 if (dev) {
950 set_bit(RTL8150_UNPLUG, &dev->flags);
951 tasklet_kill(&dev->tl);
952 unregister_netdev(dev->netdev);
953 unlink_all_urbs(dev);
954 free_all_urbs(dev);
955 free_skb_pool(dev);
956 dev_kfree_skb(dev->rx_skb);
957 kfree(dev->intr_buff);
958 free_netdev(dev->netdev);
959 }
960}
961
962static struct usb_driver rtl8150_driver = {
963 .name = driver_name,
964 .probe = rtl8150_probe,
965 .disconnect = rtl8150_disconnect,
966 .id_table = rtl8150_table,
967 .suspend = rtl8150_suspend,
968 .resume = rtl8150_resume,
969 .disable_hub_initiated_lpm = 1,
970};
971
972module_usb_driver(rtl8150_driver);
973
974MODULE_AUTHOR(DRIVER_AUTHOR);
975MODULE_DESCRIPTION(DRIVER_DESC);
976MODULE_LICENSE("GPL");