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: dev->udev, endpoint: 0, RTL8150_REQ_GET_REGS,
164 RTL8150_REQT_READ, value: indx, index: 0, data, size,
165 timeout: 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: dev->udev, endpoint: 0, RTL8150_REQ_SET_REGS,
171 RTL8150_REQT_WRITE, value: indx, index: 0, data, size,
172 timeout: 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(objp: 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(iso_packets: 0, GFP_ATOMIC);
196 if (async_urb == NULL) {
197 kfree(objp: 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(urb: async_urb, dev: dev->udev,
207 usb_sndctrlpipe(dev->udev, 0), setup_packet: (void *)&req->dr,
208 transfer_buffer: &req->rx_creg, buffer_length: size, complete_fn: async_set_reg_cb, context: req);
209 res = usb_submit_urb(urb: async_urb, GFP_ATOMIC);
210 if (res) {
211 if (res == -ENODEV)
212 netif_device_detach(dev: dev->netdev);
213 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
214 kfree(objp: req);
215 usb_free_urb(urb: async_urb);
216 }
217 return res;
218}
219
220static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
221{
222 int i;
223 u8 data[3], tmp;
224
225 data[0] = phy;
226 data[1] = data[2] = 0;
227 tmp = indx | PHY_READ | PHY_GO;
228 i = 0;
229
230 set_registers(dev, PHYADD, size: sizeof(data), data);
231 set_registers(dev, PHYCNT, size: 1, data: &tmp);
232 do {
233 get_registers(dev, PHYCNT, size: 1, data);
234 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
235
236 if (i <= MII_TIMEOUT) {
237 get_registers(dev, PHYDAT, size: 2, data);
238 *reg = data[0] | (data[1] << 8);
239 return 0;
240 } else
241 return 1;
242}
243
244static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
245{
246 int i;
247 u8 data[3], tmp;
248
249 data[0] = phy;
250 data[1] = reg & 0xff;
251 data[2] = (reg >> 8) & 0xff;
252 tmp = indx | PHY_WRITE | PHY_GO;
253 i = 0;
254
255 set_registers(dev, PHYADD, size: sizeof(data), data);
256 set_registers(dev, PHYCNT, size: 1, data: &tmp);
257 do {
258 get_registers(dev, PHYCNT, size: 1, data);
259 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
260
261 if (i <= MII_TIMEOUT)
262 return 0;
263 else
264 return 1;
265}
266
267static void set_ethernet_addr(rtl8150_t *dev)
268{
269 u8 node_id[ETH_ALEN];
270 int ret;
271
272 ret = get_registers(dev, IDR, size: sizeof(node_id), data: node_id);
273
274 if (!ret) {
275 eth_hw_addr_set(dev: dev->netdev, addr: node_id);
276 } else {
277 eth_hw_addr_random(dev: dev->netdev);
278 netdev_notice(dev: dev->netdev, format: "Assigned a random MAC address: %pM\n",
279 dev->netdev->dev_addr);
280 }
281}
282
283static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
284{
285 struct sockaddr *addr = p;
286 rtl8150_t *dev = netdev_priv(dev: netdev);
287
288 if (netif_running(dev: netdev))
289 return -EBUSY;
290
291 eth_hw_addr_set(dev: netdev, addr: addr->sa_data);
292 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
293 /* Set the IDR registers. */
294 set_registers(dev, IDR, size: netdev->addr_len, data: netdev->dev_addr);
295#ifdef EEPROM_WRITE
296 {
297 int i;
298 u8 cr;
299 /* Get the CR contents. */
300 get_registers(dev, CR, 1, &cr);
301 /* Set the WEPROM bit (eeprom write enable). */
302 cr |= 0x20;
303 set_registers(dev, CR, 1, &cr);
304 /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
305 so we need to split them up. */
306 for (i = 0; i * 2 < netdev->addr_len; i++) {
307 set_registers(dev, IDR_EEPROM + (i * 2), 2,
308 netdev->dev_addr + (i * 2));
309 }
310 /* Clear the WEPROM bit (preventing accidental eeprom writes). */
311 cr &= 0xdf;
312 set_registers(dev, CR, 1, &cr);
313 }
314#endif
315 return 0;
316}
317
318static int rtl8150_reset(rtl8150_t * dev)
319{
320 u8 data = 0x10;
321 int i = HZ;
322
323 set_registers(dev, CR, size: 1, data: &data);
324 do {
325 get_registers(dev, CR, size: 1, data: &data);
326 } while ((data & 0x10) && --i);
327
328 return (i > 0) ? 1 : 0;
329}
330
331static int alloc_all_urbs(rtl8150_t * dev)
332{
333 dev->rx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
334 if (!dev->rx_urb)
335 return 0;
336 dev->tx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
337 if (!dev->tx_urb) {
338 usb_free_urb(urb: dev->rx_urb);
339 return 0;
340 }
341 dev->intr_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL);
342 if (!dev->intr_urb) {
343 usb_free_urb(urb: dev->rx_urb);
344 usb_free_urb(urb: dev->tx_urb);
345 return 0;
346 }
347
348 return 1;
349}
350
351static void free_all_urbs(rtl8150_t * dev)
352{
353 usb_free_urb(urb: dev->rx_urb);
354 usb_free_urb(urb: dev->tx_urb);
355 usb_free_urb(urb: dev->intr_urb);
356}
357
358static void unlink_all_urbs(rtl8150_t * dev)
359{
360 usb_kill_urb(urb: dev->rx_urb);
361 usb_kill_urb(urb: dev->tx_urb);
362 usb_kill_urb(urb: dev->intr_urb);
363}
364
365static inline struct sk_buff *pull_skb(rtl8150_t *dev)
366{
367 struct sk_buff *skb;
368 int i;
369
370 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
371 if (dev->rx_skb_pool[i]) {
372 skb = dev->rx_skb_pool[i];
373 dev->rx_skb_pool[i] = NULL;
374 return skb;
375 }
376 }
377 return NULL;
378}
379
380static void read_bulk_callback(struct urb *urb)
381{
382 rtl8150_t *dev;
383 unsigned pkt_len, res;
384 struct sk_buff *skb;
385 struct net_device *netdev;
386 int status = urb->status;
387 int result;
388 unsigned long flags;
389
390 dev = urb->context;
391 if (!dev)
392 return;
393 if (test_bit(RTL8150_UNPLUG, &dev->flags))
394 return;
395 netdev = dev->netdev;
396 if (!netif_device_present(dev: netdev))
397 return;
398
399 switch (status) {
400 case 0:
401 break;
402 case -ENOENT:
403 return; /* the urb is in unlink state */
404 case -ETIME:
405 if (printk_ratelimit())
406 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
407 goto goon;
408 default:
409 if (printk_ratelimit())
410 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
411 goto goon;
412 }
413
414 if (!dev->rx_skb)
415 goto resched;
416 /* protect against short packets (tell me why we got some?!?) */
417 if (urb->actual_length < 4)
418 goto goon;
419
420 res = urb->actual_length;
421 pkt_len = res - 4;
422
423 skb_put(skb: dev->rx_skb, len: pkt_len);
424 dev->rx_skb->protocol = eth_type_trans(skb: dev->rx_skb, dev: netdev);
425 netif_rx(skb: dev->rx_skb);
426 netdev->stats.rx_packets++;
427 netdev->stats.rx_bytes += pkt_len;
428
429 spin_lock_irqsave(&dev->rx_pool_lock, flags);
430 skb = pull_skb(dev);
431 spin_unlock_irqrestore(lock: &dev->rx_pool_lock, flags);
432 if (!skb)
433 goto resched;
434
435 dev->rx_skb = skb;
436goon:
437 usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1),
438 transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev);
439 result = usb_submit_urb(urb: dev->rx_urb, GFP_ATOMIC);
440 if (result == -ENODEV)
441 netif_device_detach(dev: dev->netdev);
442 else if (result) {
443 set_bit(RX_URB_FAIL, addr: &dev->flags);
444 goto resched;
445 } else {
446 clear_bit(RX_URB_FAIL, addr: &dev->flags);
447 }
448
449 return;
450resched:
451 tasklet_schedule(t: &dev->tl);
452}
453
454static void write_bulk_callback(struct urb *urb)
455{
456 rtl8150_t *dev;
457 int status = urb->status;
458
459 dev = urb->context;
460 if (!dev)
461 return;
462 dev_kfree_skb_irq(skb: dev->tx_skb);
463 if (!netif_device_present(dev: dev->netdev))
464 return;
465 if (status)
466 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
467 dev->netdev->name, status);
468 netif_trans_update(dev: dev->netdev);
469 netif_wake_queue(dev: dev->netdev);
470}
471
472static void intr_callback(struct urb *urb)
473{
474 rtl8150_t *dev;
475 __u8 *d;
476 int status = urb->status;
477 int res;
478
479 dev = urb->context;
480 if (!dev)
481 return;
482 switch (status) {
483 case 0: /* success */
484 break;
485 case -ECONNRESET: /* unlink */
486 case -ENOENT:
487 case -ESHUTDOWN:
488 return;
489 /* -EPIPE: should clear the halt */
490 default:
491 dev_info(&urb->dev->dev, "%s: intr status %d\n",
492 dev->netdev->name, status);
493 goto resubmit;
494 }
495
496 d = urb->transfer_buffer;
497 if (d[0] & TSR_ERRORS) {
498 dev->netdev->stats.tx_errors++;
499 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
500 dev->netdev->stats.tx_aborted_errors++;
501 if (d[INT_TSR] & TSR_LCOL)
502 dev->netdev->stats.tx_window_errors++;
503 if (d[INT_TSR] & TSR_LOSS_CRS)
504 dev->netdev->stats.tx_carrier_errors++;
505 }
506 /* Report link status changes to the network stack */
507 if ((d[INT_MSR] & MSR_LINK) == 0) {
508 if (netif_carrier_ok(dev: dev->netdev)) {
509 netif_carrier_off(dev: dev->netdev);
510 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
511 }
512 } else {
513 if (!netif_carrier_ok(dev: dev->netdev)) {
514 netif_carrier_on(dev: dev->netdev);
515 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
516 }
517 }
518
519resubmit:
520 res = usb_submit_urb (urb, GFP_ATOMIC);
521 if (res == -ENODEV)
522 netif_device_detach(dev: dev->netdev);
523 else if (res)
524 dev_err(&dev->udev->dev,
525 "can't resubmit intr, %s-%s/input0, status %d\n",
526 dev->udev->bus->bus_name, dev->udev->devpath, res);
527}
528
529static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
530{
531 rtl8150_t *dev = usb_get_intfdata(intf);
532
533 netif_device_detach(dev: dev->netdev);
534
535 if (netif_running(dev: dev->netdev)) {
536 usb_kill_urb(urb: dev->rx_urb);
537 usb_kill_urb(urb: dev->intr_urb);
538 }
539 return 0;
540}
541
542static int rtl8150_resume(struct usb_interface *intf)
543{
544 rtl8150_t *dev = usb_get_intfdata(intf);
545
546 netif_device_attach(dev: dev->netdev);
547 if (netif_running(dev: dev->netdev)) {
548 dev->rx_urb->status = 0;
549 dev->rx_urb->actual_length = 0;
550 read_bulk_callback(urb: dev->rx_urb);
551
552 dev->intr_urb->status = 0;
553 dev->intr_urb->actual_length = 0;
554 intr_callback(urb: dev->intr_urb);
555 }
556 return 0;
557}
558
559/*
560**
561** network related part of the code
562**
563*/
564
565static void fill_skb_pool(rtl8150_t *dev)
566{
567 struct sk_buff *skb;
568 int i;
569
570 for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
571 if (dev->rx_skb_pool[i])
572 continue;
573 skb = dev_alloc_skb(RTL8150_MTU + 2);
574 if (!skb) {
575 return;
576 }
577 skb_reserve(skb, len: 2);
578 dev->rx_skb_pool[i] = skb;
579 }
580}
581
582static void free_skb_pool(rtl8150_t *dev)
583{
584 int i;
585
586 for (i = 0; i < RX_SKB_POOL_SIZE; i++)
587 dev_kfree_skb(dev->rx_skb_pool[i]);
588}
589
590static void rx_fixup(struct tasklet_struct *t)
591{
592 struct rtl8150 *dev = from_tasklet(dev, t, tl);
593 struct sk_buff *skb;
594 int status;
595
596 spin_lock_irq(lock: &dev->rx_pool_lock);
597 fill_skb_pool(dev);
598 spin_unlock_irq(lock: &dev->rx_pool_lock);
599 if (test_bit(RX_URB_FAIL, &dev->flags))
600 if (dev->rx_skb)
601 goto try_again;
602 spin_lock_irq(lock: &dev->rx_pool_lock);
603 skb = pull_skb(dev);
604 spin_unlock_irq(lock: &dev->rx_pool_lock);
605 if (skb == NULL)
606 goto tlsched;
607 dev->rx_skb = skb;
608 usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1),
609 transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev);
610try_again:
611 status = usb_submit_urb(urb: dev->rx_urb, GFP_ATOMIC);
612 if (status == -ENODEV) {
613 netif_device_detach(dev: dev->netdev);
614 } else if (status) {
615 set_bit(RX_URB_FAIL, addr: &dev->flags);
616 goto tlsched;
617 } else {
618 clear_bit(RX_URB_FAIL, addr: &dev->flags);
619 }
620
621 return;
622tlsched:
623 tasklet_schedule(t: &dev->tl);
624}
625
626static int enable_net_traffic(rtl8150_t * dev)
627{
628 u8 cr, tcr, rcr, msr;
629
630 if (!rtl8150_reset(dev)) {
631 dev_warn(&dev->udev->dev, "device reset failed\n");
632 }
633 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */
634 rcr = 0x9e;
635 tcr = 0xd8;
636 cr = 0x0c;
637 if (!(rcr & 0x80))
638 set_bit(RTL8150_HW_CRC, addr: &dev->flags);
639 set_registers(dev, RCR, size: 1, data: &rcr);
640 set_registers(dev, TCR, size: 1, data: &tcr);
641 set_registers(dev, CR, size: 1, data: &cr);
642 get_registers(dev, MSR, size: 1, data: &msr);
643
644 return 0;
645}
646
647static void disable_net_traffic(rtl8150_t * dev)
648{
649 u8 cr;
650
651 get_registers(dev, CR, size: 1, data: &cr);
652 cr &= 0xf3;
653 set_registers(dev, CR, size: 1, data: &cr);
654}
655
656static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
657{
658 rtl8150_t *dev = netdev_priv(dev: netdev);
659 dev_warn(&netdev->dev, "Tx timeout.\n");
660 usb_unlink_urb(urb: dev->tx_urb);
661 netdev->stats.tx_errors++;
662}
663
664static void rtl8150_set_multicast(struct net_device *netdev)
665{
666 rtl8150_t *dev = netdev_priv(dev: netdev);
667 u16 rx_creg = 0x9e;
668
669 if (netdev->flags & IFF_PROMISC) {
670 rx_creg |= 0x0001;
671 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
672 } else if (!netdev_mc_empty(netdev) ||
673 (netdev->flags & IFF_ALLMULTI)) {
674 rx_creg &= 0xfffe;
675 rx_creg |= 0x0002;
676 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
677 } else {
678 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
679 rx_creg &= 0x00fc;
680 }
681 async_set_registers(dev, RCR, size: sizeof(rx_creg), reg: rx_creg);
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(dev: netdev);
688 int count, res;
689
690 /* pad the frame and ensure terminating USB packet, datasheet 9.2.3 */
691 count = max(skb->len, ETH_ZLEN);
692 if (count % 64 == 0)
693 count++;
694 if (skb_padto(skb, len: count)) {
695 netdev->stats.tx_dropped++;
696 return NETDEV_TX_OK;
697 }
698
699 netif_stop_queue(dev: netdev);
700 dev->tx_skb = skb;
701 usb_fill_bulk_urb(urb: dev->tx_urb, dev: dev->udev, usb_sndbulkpipe(dev->udev, 2),
702 transfer_buffer: skb->data, buffer_length: count, complete_fn: write_bulk_callback, context: dev);
703 if ((res = usb_submit_urb(urb: dev->tx_urb, GFP_ATOMIC))) {
704 /* Can we get/handle EPIPE here? */
705 if (res == -ENODEV)
706 netif_device_detach(dev: dev->netdev);
707 else {
708 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
709 netdev->stats.tx_errors++;
710 netif_start_queue(dev: netdev);
711 }
712 } else {
713 netdev->stats.tx_packets++;
714 netdev->stats.tx_bytes += skb->len;
715 netif_trans_update(dev: netdev);
716 }
717
718 return NETDEV_TX_OK;
719}
720
721
722static void set_carrier(struct net_device *netdev)
723{
724 rtl8150_t *dev = netdev_priv(dev: netdev);
725 short tmp;
726
727 get_registers(dev, CSCR, size: 2, data: &tmp);
728 if (tmp & CSCR_LINK_STATUS)
729 netif_carrier_on(dev: netdev);
730 else
731 netif_carrier_off(dev: netdev);
732}
733
734static int rtl8150_open(struct net_device *netdev)
735{
736 rtl8150_t *dev = netdev_priv(dev: netdev);
737 int res;
738
739 if (dev->rx_skb == NULL)
740 dev->rx_skb = pull_skb(dev);
741 if (!dev->rx_skb)
742 return -ENOMEM;
743
744 set_registers(dev, IDR, size: 6, data: netdev->dev_addr);
745
746 usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1),
747 transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev);
748 if ((res = usb_submit_urb(urb: dev->rx_urb, GFP_KERNEL))) {
749 if (res == -ENODEV)
750 netif_device_detach(dev: dev->netdev);
751 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
752 return res;
753 }
754 usb_fill_int_urb(urb: dev->intr_urb, dev: dev->udev, usb_rcvintpipe(dev->udev, 3),
755 transfer_buffer: dev->intr_buff, INTBUFSIZE, complete_fn: intr_callback,
756 context: dev, interval: dev->intr_interval);
757 if ((res = usb_submit_urb(urb: dev->intr_urb, GFP_KERNEL))) {
758 if (res == -ENODEV)
759 netif_device_detach(dev: dev->netdev);
760 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
761 usb_kill_urb(urb: dev->rx_urb);
762 return res;
763 }
764 enable_net_traffic(dev);
765 set_carrier(netdev);
766 netif_start_queue(dev: netdev);
767
768 return res;
769}
770
771static int rtl8150_close(struct net_device *netdev)
772{
773 rtl8150_t *dev = netdev_priv(dev: netdev);
774
775 netif_stop_queue(dev: netdev);
776 if (!test_bit(RTL8150_UNPLUG, &dev->flags))
777 disable_net_traffic(dev);
778 unlink_all_urbs(dev);
779
780 return 0;
781}
782
783static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
784{
785 rtl8150_t *dev = netdev_priv(dev: netdev);
786
787 strscpy(info->driver, driver_name, sizeof(info->driver));
788 strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
789 usb_make_path(dev: dev->udev, buf: info->bus_info, size: sizeof(info->bus_info));
790}
791
792static int rtl8150_get_link_ksettings(struct net_device *netdev,
793 struct ethtool_link_ksettings *ecmd)
794{
795 rtl8150_t *dev = netdev_priv(dev: netdev);
796 short lpa = 0;
797 short bmcr = 0;
798 u32 supported;
799
800 supported = (SUPPORTED_10baseT_Half |
801 SUPPORTED_10baseT_Full |
802 SUPPORTED_100baseT_Half |
803 SUPPORTED_100baseT_Full |
804 SUPPORTED_Autoneg |
805 SUPPORTED_TP | SUPPORTED_MII);
806 ecmd->base.port = PORT_TP;
807 ecmd->base.phy_address = dev->phy;
808 get_registers(dev, BMCR, size: 2, data: &bmcr);
809 get_registers(dev, ANLP, size: 2, data: &lpa);
810 if (bmcr & BMCR_ANENABLE) {
811 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
812 SPEED_100 : SPEED_10);
813 ecmd->base.speed = speed;
814 ecmd->base.autoneg = AUTONEG_ENABLE;
815 if (speed == SPEED_100)
816 ecmd->base.duplex = (lpa & LPA_100FULL) ?
817 DUPLEX_FULL : DUPLEX_HALF;
818 else
819 ecmd->base.duplex = (lpa & LPA_10FULL) ?
820 DUPLEX_FULL : DUPLEX_HALF;
821 } else {
822 ecmd->base.autoneg = AUTONEG_DISABLE;
823 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
824 SPEED_100 : SPEED_10);
825 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
826 DUPLEX_FULL : DUPLEX_HALF;
827 }
828
829 ethtool_convert_legacy_u32_to_link_mode(dst: ecmd->link_modes.supported,
830 legacy_u32: supported);
831
832 return 0;
833}
834
835static const struct ethtool_ops ops = {
836 .get_drvinfo = rtl8150_get_drvinfo,
837 .get_link = ethtool_op_get_link,
838 .get_link_ksettings = rtl8150_get_link_ksettings,
839};
840
841static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
842 void __user *udata, int cmd)
843{
844 rtl8150_t *dev = netdev_priv(dev: netdev);
845 u16 *data = (u16 *) & rq->ifr_ifru;
846 int res = 0;
847
848 switch (cmd) {
849 case SIOCDEVPRIVATE:
850 data[0] = dev->phy;
851 fallthrough;
852 case SIOCDEVPRIVATE + 1:
853 read_mii_word(dev, phy: dev->phy, indx: (data[1] & 0x1f), reg: &data[3]);
854 break;
855 case SIOCDEVPRIVATE + 2:
856 if (!capable(CAP_NET_ADMIN))
857 return -EPERM;
858 write_mii_word(dev, phy: dev->phy, indx: (data[1] & 0x1f), reg: data[2]);
859 break;
860 default:
861 res = -EOPNOTSUPP;
862 }
863
864 return res;
865}
866
867static const struct net_device_ops rtl8150_netdev_ops = {
868 .ndo_open = rtl8150_open,
869 .ndo_stop = rtl8150_close,
870 .ndo_siocdevprivate = rtl8150_siocdevprivate,
871 .ndo_start_xmit = rtl8150_start_xmit,
872 .ndo_tx_timeout = rtl8150_tx_timeout,
873 .ndo_set_rx_mode = rtl8150_set_multicast,
874 .ndo_set_mac_address = rtl8150_set_mac_address,
875
876 .ndo_validate_addr = eth_validate_addr,
877};
878
879static int rtl8150_probe(struct usb_interface *intf,
880 const struct usb_device_id *id)
881{
882 struct usb_device *udev = interface_to_usbdev(intf);
883 rtl8150_t *dev;
884 struct net_device *netdev;
885 static const u8 bulk_ep_addr[] = {
886 RTL8150_USB_EP_BULK_IN | USB_DIR_IN,
887 RTL8150_USB_EP_BULK_OUT | USB_DIR_OUT,
888 0};
889 static const u8 int_ep_addr[] = {
890 RTL8150_USB_EP_INT_IN | USB_DIR_IN,
891 0};
892
893 netdev = alloc_etherdev(sizeof(rtl8150_t));
894 if (!netdev)
895 return -ENOMEM;
896
897 dev = netdev_priv(dev: netdev);
898
899 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
900 if (!dev->intr_buff) {
901 free_netdev(dev: netdev);
902 return -ENOMEM;
903 }
904
905 /* Verify that all required endpoints are present */
906 if (!usb_check_bulk_endpoints(intf, ep_addrs: bulk_ep_addr) ||
907 !usb_check_int_endpoints(intf, ep_addrs: int_ep_addr)) {
908 dev_err(&intf->dev, "couldn't find required endpoints\n");
909 goto out;
910 }
911
912 tasklet_setup(t: &dev->tl, callback: rx_fixup);
913 spin_lock_init(&dev->rx_pool_lock);
914
915 dev->udev = udev;
916 dev->netdev = netdev;
917 netdev->netdev_ops = &rtl8150_netdev_ops;
918 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
919 netdev->ethtool_ops = &ops;
920 dev->intr_interval = 100; /* 100ms */
921
922 if (!alloc_all_urbs(dev)) {
923 dev_err(&intf->dev, "out of memory\n");
924 goto out;
925 }
926 if (!rtl8150_reset(dev)) {
927 dev_err(&intf->dev, "couldn't reset the device\n");
928 goto out1;
929 }
930 fill_skb_pool(dev);
931 set_ethernet_addr(dev);
932
933 usb_set_intfdata(intf, data: dev);
934 SET_NETDEV_DEV(netdev, &intf->dev);
935 if (register_netdev(dev: netdev) != 0) {
936 dev_err(&intf->dev, "couldn't register the device\n");
937 goto out2;
938 }
939
940 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
941
942 return 0;
943
944out2:
945 usb_set_intfdata(intf, NULL);
946 free_skb_pool(dev);
947out1:
948 free_all_urbs(dev);
949out:
950 kfree(objp: dev->intr_buff);
951 free_netdev(dev: netdev);
952 return -EIO;
953}
954
955static void rtl8150_disconnect(struct usb_interface *intf)
956{
957 rtl8150_t *dev = usb_get_intfdata(intf);
958
959 usb_set_intfdata(intf, NULL);
960 if (dev) {
961 set_bit(RTL8150_UNPLUG, addr: &dev->flags);
962 tasklet_kill(t: &dev->tl);
963 unregister_netdev(dev: dev->netdev);
964 unlink_all_urbs(dev);
965 free_all_urbs(dev);
966 free_skb_pool(dev);
967 dev_kfree_skb(dev->rx_skb);
968 kfree(objp: dev->intr_buff);
969 free_netdev(dev: dev->netdev);
970 }
971}
972
973static struct usb_driver rtl8150_driver = {
974 .name = driver_name,
975 .probe = rtl8150_probe,
976 .disconnect = rtl8150_disconnect,
977 .id_table = rtl8150_table,
978 .suspend = rtl8150_suspend,
979 .resume = rtl8150_resume,
980 .disable_hub_initiated_lpm = 1,
981};
982
983module_usb_driver(rtl8150_driver);
984
985MODULE_AUTHOR(DRIVER_AUTHOR);
986MODULE_DESCRIPTION(DRIVER_DESC);
987MODULE_LICENSE("GPL");
988

source code of linux/drivers/net/usb/rtl8150.c