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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/* USB endpoints */
75enum rtl8150_usb_ep {
76 RTL8150_USB_EP_CONTROL = 0,
77 RTL8150_USB_EP_BULK_IN = 1,
78 RTL8150_USB_EP_BULK_OUT = 2,
79 RTL8150_USB_EP_INT_IN = 3,
80};
81
82/* Interrupt pipe data */
83#define INT_TSR 0x00
84#define INT_RSR 0x01
85#define INT_MSR 0x02
86#define INT_WAKSR 0x03
87#define INT_TXOK_CNT 0x04
88#define INT_RXLOST_CNT 0x05
89#define INT_CRERR_CNT 0x06
90#define INT_COL_CNT 0x07
91
92
93#define RTL8150_MTU 1540
94#define RTL8150_TX_TIMEOUT (HZ)
95#define RX_SKB_POOL_SIZE 4
96
97/* rtl8150 flags */
98#define RTL8150_HW_CRC 0
99#define RX_REG_SET 1
100#define RTL8150_UNPLUG 2
101#define RX_URB_FAIL 3
102
103/* Define these values to match your device */
104#define VENDOR_ID_REALTEK 0x0bda
105#define VENDOR_ID_MELCO 0x0411
106#define VENDOR_ID_MICRONET 0x3980
107#define VENDOR_ID_LONGSHINE 0x07b8
108#define VENDOR_ID_OQO 0x1557
109#define VENDOR_ID_ZYXEL 0x0586
110
111#define PRODUCT_ID_RTL8150 0x8150
112#define PRODUCT_ID_LUAKTX 0x0012
113#define PRODUCT_ID_LCS8138TX 0x401a
114#define PRODUCT_ID_SP128AR 0x0003
115#define PRODUCT_ID_PRESTIGE 0x401a
116
117#undef EEPROM_WRITE
118
119/* table of devices that work with this driver */
120static const struct usb_device_id rtl8150_table[] = {
121 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
122 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
123 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
124 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
125 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
126 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
127 {}
128};
129
130MODULE_DEVICE_TABLE(usb, rtl8150_table);
131
132struct rtl8150 {
133 unsigned long flags;
134 struct usb_device *udev;
135 struct tasklet_struct tl;
136 struct net_device *netdev;
137 struct urb *rx_urb, *tx_urb, *intr_urb;
138 struct sk_buff *tx_skb, *rx_skb;
139 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
140 spinlock_t rx_pool_lock;
141 struct usb_ctrlrequest dr;
142 int intr_interval;
143 u8 *intr_buff;
144 u8 phy;
145};
146
147typedef struct rtl8150 rtl8150_t;
148
149struct async_req {
150 struct usb_ctrlrequest dr;
151 u16 rx_creg;
152};
153
154static const char driver_name [] = "rtl8150";
155
156/*
157**
158** device related part of the code
159**
160*/
161static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
162{
163 return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
164 RTL8150_REQT_READ, indx, 0, data, size,
165 1000, GFP_NOIO);
166}
167
168static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
169{
170 return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
171 RTL8150_REQT_WRITE, indx, 0, data, size,
172 1000, GFP_NOIO);
173}
174
175static void async_set_reg_cb(struct urb *urb)
176{
177 struct async_req *req = (struct async_req *)urb->context;
178 int status = urb->status;
179
180 if (status < 0)
181 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
182 kfree(req);
183 usb_free_urb(urb);
184}
185
186static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
187{
188 int res = -ENOMEM;
189 struct urb *async_urb;
190 struct async_req *req;
191
192 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
193 if (req == NULL)
194 return res;
195 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
196 if (async_urb == NULL) {
197 kfree(req);
198 return res;
199 }
200 req->rx_creg = cpu_to_le16(reg);
201 req->dr.bRequestType = RTL8150_REQT_WRITE;
202 req->dr.bRequest = RTL8150_REQ_SET_REGS;
203 req->dr.wIndex = 0;
204 req->dr.wValue = cpu_to_le16(indx);
205 req->dr.wLength = cpu_to_le16(size);
206 usb_fill_control_urb(async_urb, dev->udev,
207 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
208 &req->rx_creg, size, async_set_reg_cb, req);
209 res = usb_submit_urb(async_urb, GFP_ATOMIC);
210 if (res) {
211 if (res == -ENODEV)
212 netif_device_detach(dev->netdev);
213 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
214 }
215 return res;
216}
217
218static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
219{
220 int i;
221 u8 data[3], tmp;
222
223 data[0] = phy;
224 data[1] = data[2] = 0;
225 tmp = indx | PHY_READ | PHY_GO;
226 i = 0;
227
228 set_registers(dev, PHYADD, sizeof(data), data);
229 set_registers(dev, PHYCNT, 1, &tmp);
230 do {
231 get_registers(dev, PHYCNT, 1, data);
232 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
233
234 if (i <= MII_TIMEOUT) {
235 get_registers(dev, PHYDAT, 2, data);
236 *reg = data[0] | (data[1] << 8);
237 return 0;
238 } else
239 return 1;
240}
241
242static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
243{
244 int i;
245 u8 data[3], tmp;
246
247 data[0] = phy;
248 data[1] = reg & 0xff;
249 data[2] = (reg >> 8) & 0xff;
250 tmp = indx | PHY_WRITE | PHY_GO;
251 i = 0;
252
253 set_registers(dev, PHYADD, sizeof(data), data);
254 set_registers(dev, PHYCNT, 1, &tmp);
255 do {
256 get_registers(dev, PHYCNT, 1, data);
257 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
258
259 if (i <= MII_TIMEOUT)
260 return 0;
261 else
262 return 1;
263}
264
265static void set_ethernet_addr(rtl8150_t *dev)
266{
267 u8 node_id[ETH_ALEN];
268 int ret;
269
270 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
271
272 if (!ret) {
273 eth_hw_addr_set(dev->netdev, node_id);
274 } else {
275 eth_hw_addr_random(dev->netdev);
276 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
277 dev->netdev->dev_addr);
278 }
279}
280
281static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
282{
283 struct sockaddr *addr = p;
284 rtl8150_t *dev = netdev_priv(netdev);
285
286 if (netif_running(netdev))
287 return -EBUSY;
288
289 eth_hw_addr_set(netdev, addr->sa_data);
290 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
291 /* Set the IDR registers. */
292 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
293#ifdef EEPROM_WRITE
294 {
295 int i;
296 u8 cr;
297 /* Get the CR contents. */
298 get_registers(dev, CR, 1, &cr);
299 /* Set the WEPROM bit (eeprom write enable). */
300 cr |= 0x20;
301 set_registers(dev, CR, 1, &cr);
302 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
303 so we need to split them up. */
304 for (i = 0; i * 2 < netdev->addr_len; i++) {
305 set_registers(dev, IDR_EEPROM + (i * 2), 2,
306 netdev->dev_addr + (i * 2));
307 }
308 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
309 cr &= 0xdf;
310 set_registers(dev, CR, 1, &cr);
311 }
312#endif
313 return 0;
314}
315
316static int rtl8150_reset(rtl8150_t * dev)
317{
318 u8 data = 0x10;
319 int i = HZ;
320
321 set_registers(dev, CR, 1, &data);
322 do {
323 get_registers(dev, CR, 1, &data);
324 } while ((data & 0x10) && --i);
325
326 return (i > 0) ? 1 : 0;
327}
328
329static int alloc_all_urbs(rtl8150_t * dev)
330{
331 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
332 if (!dev->rx_urb)
333 return 0;
334 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
335 if (!dev->tx_urb) {
336 usb_free_urb(dev->rx_urb);
337 return 0;
338 }
339 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
340 if (!dev->intr_urb) {
341 usb_free_urb(dev->rx_urb);
342 usb_free_urb(dev->tx_urb);
343 return 0;
344 }
345
346 return 1;
347}
348
349static void free_all_urbs(rtl8150_t * dev)
350{
351 usb_free_urb(dev->rx_urb);
352 usb_free_urb(dev->tx_urb);
353 usb_free_urb(dev->intr_urb);
354}
355
356static void unlink_all_urbs(rtl8150_t * dev)
357{
358 usb_kill_urb(dev->rx_urb);
359 usb_kill_urb(dev->tx_urb);
360 usb_kill_urb(dev->intr_urb);
361}
362
363static inline struct sk_buff *pull_skb(rtl8150_t *dev)
364{
365 struct sk_buff *skb;
366 int i;
367
368 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
369 if (dev->rx_skb_pool[i]) {
370 skb = dev->rx_skb_pool[i];
371 dev->rx_skb_pool[i] = NULL;
372 return skb;
373 }
374 }
375 return NULL;
376}
377
378static void read_bulk_callback(struct urb *urb)
379{
380 rtl8150_t *dev;
381 unsigned pkt_len, res;
382 struct sk_buff *skb;
383 struct net_device *netdev;
384 int status = urb->status;
385 int result;
386 unsigned long flags;
387
388 dev = urb->context;
389 if (!dev)
390 return;
391 if (test_bit(RTL8150_UNPLUG, &dev->flags))
392 return;
393 netdev = dev->netdev;
394 if (!netif_device_present(netdev))
395 return;
396
397 switch (status) {
398 case 0:
399 break;
400 case -ENOENT:
401 return; /* the urb is in unlink state */
402 case -ETIME:
403 if (printk_ratelimit())
404 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
405 goto goon;
406 default:
407 if (printk_ratelimit())
408 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
409 goto goon;
410 }
411
412 if (!dev->rx_skb)
413 goto resched;
414 /* protect against short packets (tell me why we got some?!?) */
415 if (urb->actual_length < 4)
416 goto goon;
417
418 res = urb->actual_length;
419 pkt_len = res - 4;
420
421 skb_put(dev->rx_skb, pkt_len);
422 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
423 netif_rx(dev->rx_skb);
424 netdev->stats.rx_packets++;
425 netdev->stats.rx_bytes += pkt_len;
426
427 spin_lock_irqsave(&dev->rx_pool_lock, flags);
428 skb = pull_skb(dev);
429 spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
430 if (!skb)
431 goto resched;
432
433 dev->rx_skb = skb;
434goon:
435 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
436 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
437 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
438 if (result == -ENODEV)
439 netif_device_detach(dev->netdev);
440 else if (result) {
441 set_bit(RX_URB_FAIL, &dev->flags);
442 goto resched;
443 } else {
444 clear_bit(RX_URB_FAIL, &dev->flags);
445 }
446
447 return;
448resched:
449 tasklet_schedule(&dev->tl);
450}
451
452static void write_bulk_callback(struct urb *urb)
453{
454 rtl8150_t *dev;
455 int status = urb->status;
456
457 dev = urb->context;
458 if (!dev)
459 return;
460 dev_kfree_skb_irq(dev->tx_skb);
461 if (!netif_device_present(dev->netdev))
462 return;
463 if (status)
464 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
465 dev->netdev->name, status);
466 netif_trans_update(dev->netdev);
467 netif_wake_queue(dev->netdev);
468}
469
470static void intr_callback(struct urb *urb)
471{
472 rtl8150_t *dev;
473 __u8 *d;
474 int status = urb->status;
475 int res;
476
477 dev = urb->context;
478 if (!dev)
479 return;
480 switch (status) {
481 case 0: /* success */
482 break;
483 case -ECONNRESET: /* unlink */
484 case -ENOENT:
485 case -ESHUTDOWN:
486 return;
487 /* -EPIPE: should clear the halt */
488 default:
489 dev_info(&urb->dev->dev, "%s: intr status %d\n",
490 dev->netdev->name, status);
491 goto resubmit;
492 }
493
494 d = urb->transfer_buffer;
495 if (d[0] & TSR_ERRORS) {
496 dev->netdev->stats.tx_errors++;
497 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
498 dev->netdev->stats.tx_aborted_errors++;
499 if (d[INT_TSR] & TSR_LCOL)
500 dev->netdev->stats.tx_window_errors++;
501 if (d[INT_TSR] & TSR_LOSS_CRS)
502 dev->netdev->stats.tx_carrier_errors++;
503 }
504 /* Report link status changes to the network stack */
505 if ((d[INT_MSR] & MSR_LINK) == 0) {
506 if (netif_carrier_ok(dev->netdev)) {
507 netif_carrier_off(dev->netdev);
508 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
509 }
510 } else {
511 if (!netif_carrier_ok(dev->netdev)) {
512 netif_carrier_on(dev->netdev);
513 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
514 }
515 }
516
517resubmit:
518 res = usb_submit_urb (urb, GFP_ATOMIC);
519 if (res == -ENODEV)
520 netif_device_detach(dev->netdev);
521 else if (res)
522 dev_err(&dev->udev->dev,
523 "can't resubmit intr, %s-%s/input0, status %d\n",
524 dev->udev->bus->bus_name, dev->udev->devpath, res);
525}
526
527static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
528{
529 rtl8150_t *dev = usb_get_intfdata(intf);
530
531 netif_device_detach(dev->netdev);
532
533 if (netif_running(dev->netdev)) {
534 usb_kill_urb(dev->rx_urb);
535 usb_kill_urb(dev->intr_urb);
536 }
537 return 0;
538}
539
540static int rtl8150_resume(struct usb_interface *intf)
541{
542 rtl8150_t *dev = usb_get_intfdata(intf);
543
544 netif_device_attach(dev->netdev);
545 if (netif_running(dev->netdev)) {
546 dev->rx_urb->status = 0;
547 dev->rx_urb->actual_length = 0;
548 read_bulk_callback(dev->rx_urb);
549
550 dev->intr_urb->status = 0;
551 dev->intr_urb->actual_length = 0;
552 intr_callback(dev->intr_urb);
553 }
554 return 0;
555}
556
557/*
558**
559** network related part of the code
560**
561*/
562
563static void fill_skb_pool(rtl8150_t *dev)
564{
565 struct sk_buff *skb;
566 int i;
567
568 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
569 if (dev->rx_skb_pool[i])
570 continue;
571 skb = dev_alloc_skb(RTL8150_MTU + 2);
572 if (!skb) {
573 return;
574 }
575 skb_reserve(skb, 2);
576 dev->rx_skb_pool[i] = skb;
577 }
578}
579
580static void free_skb_pool(rtl8150_t *dev)
581{
582 int i;
583
584 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
585 dev_kfree_skb(dev->rx_skb_pool[i]);
586}
587
588static void rx_fixup(struct tasklet_struct *t)
589{
590 struct rtl8150 *dev = from_tasklet(dev, t, tl);
591 struct sk_buff *skb;
592 int status;
593
594 spin_lock_irq(&dev->rx_pool_lock);
595 fill_skb_pool(dev);
596 spin_unlock_irq(&dev->rx_pool_lock);
597 if (test_bit(RX_URB_FAIL, &dev->flags))
598 if (dev->rx_skb)
599 goto try_again;
600 spin_lock_irq(&dev->rx_pool_lock);
601 skb = pull_skb(dev);
602 spin_unlock_irq(&dev->rx_pool_lock);
603 if (skb == NULL)
604 goto tlsched;
605 dev->rx_skb = skb;
606 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
607 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
608try_again:
609 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
610 if (status == -ENODEV) {
611 netif_device_detach(dev->netdev);
612 } else if (status) {
613 set_bit(RX_URB_FAIL, &dev->flags);
614 goto tlsched;
615 } else {
616 clear_bit(RX_URB_FAIL, &dev->flags);
617 }
618
619 return;
620tlsched:
621 tasklet_schedule(&dev->tl);
622}
623
624static int enable_net_traffic(rtl8150_t * dev)
625{
626 u8 cr, tcr, rcr, msr;
627
628 if (!rtl8150_reset(dev)) {
629 dev_warn(&dev->udev->dev, "device reset failed\n");
630 }
631 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
632 rcr = 0x9e;
633 tcr = 0xd8;
634 cr = 0x0c;
635 if (!(rcr & 0x80))
636 set_bit(RTL8150_HW_CRC, &dev->flags);
637 set_registers(dev, RCR, 1, &rcr);
638 set_registers(dev, TCR, 1, &tcr);
639 set_registers(dev, CR, 1, &cr);
640 get_registers(dev, MSR, 1, &msr);
641
642 return 0;
643}
644
645static void disable_net_traffic(rtl8150_t * dev)
646{
647 u8 cr;
648
649 get_registers(dev, CR, 1, &cr);
650 cr &= 0xf3;
651 set_registers(dev, CR, 1, &cr);
652}
653
654static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
655{
656 rtl8150_t *dev = netdev_priv(netdev);
657 dev_warn(&netdev->dev, "Tx timeout.\n");
658 usb_unlink_urb(dev->tx_urb);
659 netdev->stats.tx_errors++;
660}
661
662static void rtl8150_set_multicast(struct net_device *netdev)
663{
664 rtl8150_t *dev = netdev_priv(netdev);
665 u16 rx_creg = 0x9e;
666
667 netif_stop_queue(netdev);
668 if (netdev->flags & IFF_PROMISC) {
669 rx_creg |= 0x0001;
670 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
671 } else if (!netdev_mc_empty(netdev) ||
672 (netdev->flags & IFF_ALLMULTI)) {
673 rx_creg &= 0xfffe;
674 rx_creg |= 0x0002;
675 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
676 } else {
677 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
678 rx_creg &= 0x00fc;
679 }
680 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
681 netif_wake_queue(netdev);
682}
683
684static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
685 struct net_device *netdev)
686{
687 rtl8150_t *dev = netdev_priv(netdev);
688 int count, res;
689
690 netif_stop_queue(netdev);
691 count = (skb->len < 60) ? 60 : skb->len;
692 count = (count & 0x3f) ? count : count + 1;
693 dev->tx_skb = skb;
694 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
695 skb->data, count, write_bulk_callback, dev);
696 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
697 /* Can we get/handle EPIPE here? */
698 if (res == -ENODEV)
699 netif_device_detach(dev->netdev);
700 else {
701 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
702 netdev->stats.tx_errors++;
703 netif_start_queue(netdev);
704 }
705 } else {
706 netdev->stats.tx_packets++;
707 netdev->stats.tx_bytes += skb->len;
708 netif_trans_update(netdev);
709 }
710
711 return NETDEV_TX_OK;
712}
713
714
715static void set_carrier(struct net_device *netdev)
716{
717 rtl8150_t *dev = netdev_priv(netdev);
718 short tmp;
719
720 get_registers(dev, CSCR, 2, &tmp);
721 if (tmp & CSCR_LINK_STATUS)
722 netif_carrier_on(netdev);
723 else
724 netif_carrier_off(netdev);
725}
726
727static int rtl8150_open(struct net_device *netdev)
728{
729 rtl8150_t *dev = netdev_priv(netdev);
730 int res;
731
732 if (dev->rx_skb == NULL)
733 dev->rx_skb = pull_skb(dev);
734 if (!dev->rx_skb)
735 return -ENOMEM;
736
737 set_registers(dev, IDR, 6, netdev->dev_addr);
738
739 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
740 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
741 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
742 if (res == -ENODEV)
743 netif_device_detach(dev->netdev);
744 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
745 return res;
746 }
747 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
748 dev->intr_buff, INTBUFSIZE, intr_callback,
749 dev, dev->intr_interval);
750 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
751 if (res == -ENODEV)
752 netif_device_detach(dev->netdev);
753 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
754 usb_kill_urb(dev->rx_urb);
755 return res;
756 }
757 enable_net_traffic(dev);
758 set_carrier(netdev);
759 netif_start_queue(netdev);
760
761 return res;
762}
763
764static int rtl8150_close(struct net_device *netdev)
765{
766 rtl8150_t *dev = netdev_priv(netdev);
767
768 netif_stop_queue(netdev);
769 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
770 disable_net_traffic(dev);
771 unlink_all_urbs(dev);
772
773 return 0;
774}
775
776static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
777{
778 rtl8150_t *dev = netdev_priv(netdev);
779
780 strscpy(info->driver, driver_name, sizeof(info->driver));
781 strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
782 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
783}
784
785static int rtl8150_get_link_ksettings(struct net_device *netdev,
786 struct ethtool_link_ksettings *ecmd)
787{
788 rtl8150_t *dev = netdev_priv(netdev);
789 short lpa = 0;
790 short bmcr = 0;
791 u32 supported;
792
793 supported = (SUPPORTED_10baseT_Half |
794 SUPPORTED_10baseT_Full |
795 SUPPORTED_100baseT_Half |
796 SUPPORTED_100baseT_Full |
797 SUPPORTED_Autoneg |
798 SUPPORTED_TP | SUPPORTED_MII);
799 ecmd->base.port = PORT_TP;
800 ecmd->base.phy_address = dev->phy;
801 get_registers(dev, BMCR, 2, &bmcr);
802 get_registers(dev, ANLP, 2, &lpa);
803 if (bmcr & BMCR_ANENABLE) {
804 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
805 SPEED_100 : SPEED_10);
806 ecmd->base.speed = speed;
807 ecmd->base.autoneg = AUTONEG_ENABLE;
808 if (speed == SPEED_100)
809 ecmd->base.duplex = (lpa & LPA_100FULL) ?
810 DUPLEX_FULL : DUPLEX_HALF;
811 else
812 ecmd->base.duplex = (lpa & LPA_10FULL) ?
813 DUPLEX_FULL : DUPLEX_HALF;
814 } else {
815 ecmd->base.autoneg = AUTONEG_DISABLE;
816 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
817 SPEED_100 : SPEED_10);
818 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
819 DUPLEX_FULL : DUPLEX_HALF;
820 }
821
822 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
823 supported);
824
825 return 0;
826}
827
828static const struct ethtool_ops ops = {
829 .get_drvinfo = rtl8150_get_drvinfo,
830 .get_link = ethtool_op_get_link,
831 .get_link_ksettings = rtl8150_get_link_ksettings,
832};
833
834static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
835 void __user *udata, int cmd)
836{
837 rtl8150_t *dev = netdev_priv(netdev);
838 u16 *data = (u16 *) & rq->ifr_ifru;
839 int res = 0;
840
841 switch (cmd) {
842 case SIOCDEVPRIVATE:
843 data[0] = dev->phy;
844 fallthrough;
845 case SIOCDEVPRIVATE + 1:
846 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
847 break;
848 case SIOCDEVPRIVATE + 2:
849 if (!capable(CAP_NET_ADMIN))
850 return -EPERM;
851 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
852 break;
853 default:
854 res = -EOPNOTSUPP;
855 }
856
857 return res;
858}
859
860static const struct net_device_ops rtl8150_netdev_ops = {
861 .ndo_open = rtl8150_open,
862 .ndo_stop = rtl8150_close,
863 .ndo_siocdevprivate = rtl8150_siocdevprivate,
864 .ndo_start_xmit = rtl8150_start_xmit,
865 .ndo_tx_timeout = rtl8150_tx_timeout,
866 .ndo_set_rx_mode = rtl8150_set_multicast,
867 .ndo_set_mac_address = rtl8150_set_mac_address,
868
869 .ndo_validate_addr = eth_validate_addr,
870};
871
872static int rtl8150_probe(struct usb_interface *intf,
873 const struct usb_device_id *id)
874{
875 struct usb_device *udev = interface_to_usbdev(intf);
876 rtl8150_t *dev;
877 struct net_device *netdev;
878 static const u8 bulk_ep_addr[] = {
879 RTL8150_USB_EP_BULK_IN | USB_DIR_IN,
880 RTL8150_USB_EP_BULK_OUT | USB_DIR_OUT,
881 0};
882 static const u8 int_ep_addr[] = {
883 RTL8150_USB_EP_INT_IN | USB_DIR_IN,
884 0};
885
886 netdev = alloc_etherdev(sizeof(rtl8150_t));
887 if (!netdev)
888 return -ENOMEM;
889
890 dev = netdev_priv(netdev);
891
892 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
893 if (!dev->intr_buff) {
894 free_netdev(netdev);
895 return -ENOMEM;
896 }
897
898 /* Verify that all required endpoints are present */
899 if (!usb_check_bulk_endpoints(intf, bulk_ep_addr) ||
900 !usb_check_int_endpoints(intf, int_ep_addr)) {
901 dev_err(&intf->dev, "couldn't find required endpoints\n");
902 goto out;
903 }
904
905 tasklet_setup(&dev->tl, rx_fixup);
906 spin_lock_init(&dev->rx_pool_lock);
907
908 dev->udev = udev;
909 dev->netdev = netdev;
910 netdev->netdev_ops = &rtl8150_netdev_ops;
911 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
912 netdev->ethtool_ops = &ops;
913 dev->intr_interval = 100; /* 100ms */
914
915 if (!alloc_all_urbs(dev)) {
916 dev_err(&intf->dev, "out of memory\n");
917 goto out;
918 }
919 if (!rtl8150_reset(dev)) {
920 dev_err(&intf->dev, "couldn't reset the device\n");
921 goto out1;
922 }
923 fill_skb_pool(dev);
924 set_ethernet_addr(dev);
925
926 usb_set_intfdata(intf, dev);
927 SET_NETDEV_DEV(netdev, &intf->dev);
928 if (register_netdev(netdev) != 0) {
929 dev_err(&intf->dev, "couldn't register the device\n");
930 goto out2;
931 }
932
933 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
934
935 return 0;
936
937out2:
938 usb_set_intfdata(intf, NULL);
939 free_skb_pool(dev);
940out1:
941 free_all_urbs(dev);
942out:
943 kfree(dev->intr_buff);
944 free_netdev(netdev);
945 return -EIO;
946}
947
948static void rtl8150_disconnect(struct usb_interface *intf)
949{
950 rtl8150_t *dev = usb_get_intfdata(intf);
951
952 usb_set_intfdata(intf, NULL);
953 if (dev) {
954 set_bit(RTL8150_UNPLUG, &dev->flags);
955 tasklet_kill(&dev->tl);
956 unregister_netdev(dev->netdev);
957 unlink_all_urbs(dev);
958 free_all_urbs(dev);
959 free_skb_pool(dev);
960 dev_kfree_skb(dev->rx_skb);
961 kfree(dev->intr_buff);
962 free_netdev(dev->netdev);
963 }
964}
965
966static struct usb_driver rtl8150_driver = {
967 .name = driver_name,
968 .probe = rtl8150_probe,
969 .disconnect = rtl8150_disconnect,
970 .id_table = rtl8150_table,
971 .suspend = rtl8150_suspend,
972 .resume = rtl8150_resume,
973 .disable_hub_initiated_lpm = 1,
974};
975
976module_usb_driver(rtl8150_driver);
977
978MODULE_AUTHOR(DRIVER_AUTHOR);
979MODULE_DESCRIPTION(DRIVER_DESC);
980MODULE_LICENSE("GPL");