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 */
75 enum 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 */
120 static 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
130 MODULE_DEVICE_TABLE(usb, rtl8150_table);
131
132 struct 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
147 typedef struct rtl8150 rtl8150_t;
148
149 struct async_req {
150 struct usb_ctrlrequest dr;
151 u16 rx_creg;
152 };
153
154 static const char driver_name [] = "rtl8150";
155
156 /*
157 **
158 ** device related part of the code
159 **
160 */
get_registers(rtl8150_t * dev,u16 indx,u16 size,void * data)161 static 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
set_registers(rtl8150_t * dev,u16 indx,u16 size,const void * data)168 static 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
async_set_reg_cb(struct urb * urb)175 static 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
async_set_registers(rtl8150_t * dev,u16 indx,u16 size,u16 reg)186 static 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 kfree(req);
215 usb_free_urb(async_urb);
216 }
217 return res;
218 }
219
read_mii_word(rtl8150_t * dev,u8 phy,__u8 indx,u16 * reg)220 static 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, sizeof(data), data);
231 set_registers(dev, PHYCNT, 1, &tmp);
232 do {
233 get_registers(dev, PHYCNT, 1, data);
234 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
235
236 if (i <= MII_TIMEOUT) {
237 get_registers(dev, PHYDAT, 2, data);
238 *reg = data[0] | (data[1] << 8);
239 return 0;
240 } else
241 return 1;
242 }
243
write_mii_word(rtl8150_t * dev,u8 phy,__u8 indx,u16 reg)244 static 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, sizeof(data), data);
256 set_registers(dev, PHYCNT, 1, &tmp);
257 do {
258 get_registers(dev, PHYCNT, 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
set_ethernet_addr(rtl8150_t * dev)267 static void set_ethernet_addr(rtl8150_t *dev)
268 {
269 u8 node_id[ETH_ALEN];
270 int ret;
271
272 ret = get_registers(dev, IDR, sizeof(node_id), node_id);
273
274 if (!ret) {
275 eth_hw_addr_set(dev->netdev, node_id);
276 } else {
277 eth_hw_addr_random(dev->netdev);
278 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
279 dev->netdev->dev_addr);
280 }
281 }
282
rtl8150_set_mac_address(struct net_device * netdev,void * p)283 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
284 {
285 struct sockaddr *addr = p;
286 rtl8150_t *dev = netdev_priv(netdev);
287
288 if (netif_running(netdev))
289 return -EBUSY;
290
291 eth_hw_addr_set(netdev, 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, netdev->addr_len, 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
rtl8150_reset(rtl8150_t * dev)318 static int rtl8150_reset(rtl8150_t * dev)
319 {
320 u8 data = 0x10;
321 int i = HZ;
322
323 set_registers(dev, CR, 1, &data);
324 do {
325 get_registers(dev, CR, 1, &data);
326 } while ((data & 0x10) && --i);
327
328 return (i > 0) ? 1 : 0;
329 }
330
alloc_all_urbs(rtl8150_t * dev)331 static int alloc_all_urbs(rtl8150_t * dev)
332 {
333 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
334 if (!dev->rx_urb)
335 return 0;
336 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
337 if (!dev->tx_urb) {
338 usb_free_urb(dev->rx_urb);
339 return 0;
340 }
341 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
342 if (!dev->intr_urb) {
343 usb_free_urb(dev->rx_urb);
344 usb_free_urb(dev->tx_urb);
345 return 0;
346 }
347
348 return 1;
349 }
350
free_all_urbs(rtl8150_t * dev)351 static void free_all_urbs(rtl8150_t * dev)
352 {
353 usb_free_urb(dev->rx_urb);
354 usb_free_urb(dev->tx_urb);
355 usb_free_urb(dev->intr_urb);
356 }
357
unlink_all_urbs(rtl8150_t * dev)358 static void unlink_all_urbs(rtl8150_t * dev)
359 {
360 usb_kill_urb(dev->rx_urb);
361 usb_kill_urb(dev->tx_urb);
362 usb_kill_urb(dev->intr_urb);
363 }
364
pull_skb(rtl8150_t * dev)365 static 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
read_bulk_callback(struct urb * urb)380 static 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(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(dev->rx_skb, pkt_len);
424 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
425 netif_rx(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(&dev->rx_pool_lock, flags);
432 if (!skb)
433 goto resched;
434
435 dev->rx_skb = skb;
436 goon:
437 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
438 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
439 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
440 if (result == -ENODEV)
441 netif_device_detach(dev->netdev);
442 else if (result) {
443 set_bit(RX_URB_FAIL, &dev->flags);
444 goto resched;
445 } else {
446 clear_bit(RX_URB_FAIL, &dev->flags);
447 }
448
449 return;
450 resched:
451 tasklet_schedule(&dev->tl);
452 }
453
write_bulk_callback(struct urb * urb)454 static 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(dev->tx_skb);
463 if (!netif_device_present(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->netdev);
469 netif_wake_queue(dev->netdev);
470 }
471
intr_callback(struct urb * urb)472 static 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->netdev)) {
509 netif_carrier_off(dev->netdev);
510 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
511 }
512 } else {
513 if (!netif_carrier_ok(dev->netdev)) {
514 netif_carrier_on(dev->netdev);
515 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
516 }
517 }
518
519 resubmit:
520 res = usb_submit_urb (urb, GFP_ATOMIC);
521 if (res == -ENODEV)
522 netif_device_detach(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
rtl8150_suspend(struct usb_interface * intf,pm_message_t message)529 static 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->netdev);
534
535 if (netif_running(dev->netdev)) {
536 usb_kill_urb(dev->rx_urb);
537 usb_kill_urb(dev->intr_urb);
538 }
539 return 0;
540 }
541
rtl8150_resume(struct usb_interface * intf)542 static int rtl8150_resume(struct usb_interface *intf)
543 {
544 rtl8150_t *dev = usb_get_intfdata(intf);
545
546 netif_device_attach(dev->netdev);
547 if (netif_running(dev->netdev)) {
548 dev->rx_urb->status = 0;
549 dev->rx_urb->actual_length = 0;
550 read_bulk_callback(dev->rx_urb);
551
552 dev->intr_urb->status = 0;
553 dev->intr_urb->actual_length = 0;
554 intr_callback(dev->intr_urb);
555 }
556 return 0;
557 }
558
559 /*
560 **
561 ** network related part of the code
562 **
563 */
564
fill_skb_pool(rtl8150_t * dev)565 static 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, 2);
578 dev->rx_skb_pool[i] = skb;
579 }
580 }
581
free_skb_pool(rtl8150_t * dev)582 static 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
rx_fixup(struct tasklet_struct * t)590 static 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(&dev->rx_pool_lock);
597 fill_skb_pool(dev);
598 spin_unlock_irq(&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(&dev->rx_pool_lock);
603 skb = pull_skb(dev);
604 spin_unlock_irq(&dev->rx_pool_lock);
605 if (skb == NULL)
606 goto tlsched;
607 dev->rx_skb = skb;
608 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
609 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
610 try_again:
611 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
612 if (status == -ENODEV) {
613 netif_device_detach(dev->netdev);
614 } else if (status) {
615 set_bit(RX_URB_FAIL, &dev->flags);
616 goto tlsched;
617 } else {
618 clear_bit(RX_URB_FAIL, &dev->flags);
619 }
620
621 return;
622 tlsched:
623 tasklet_schedule(&dev->tl);
624 }
625
enable_net_traffic(rtl8150_t * dev)626 static 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, &dev->flags);
639 set_registers(dev, RCR, 1, &rcr);
640 set_registers(dev, TCR, 1, &tcr);
641 set_registers(dev, CR, 1, &cr);
642 get_registers(dev, MSR, 1, &msr);
643
644 return 0;
645 }
646
disable_net_traffic(rtl8150_t * dev)647 static void disable_net_traffic(rtl8150_t * dev)
648 {
649 u8 cr;
650
651 get_registers(dev, CR, 1, &cr);
652 cr &= 0xf3;
653 set_registers(dev, CR, 1, &cr);
654 }
655
rtl8150_tx_timeout(struct net_device * netdev,unsigned int txqueue)656 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
657 {
658 rtl8150_t *dev = netdev_priv(netdev);
659 dev_warn(&netdev->dev, "Tx timeout.\n");
660 usb_unlink_urb(dev->tx_urb);
661 netdev->stats.tx_errors++;
662 }
663
rtl8150_set_multicast(struct net_device * netdev)664 static void rtl8150_set_multicast(struct net_device *netdev)
665 {
666 rtl8150_t *dev = netdev_priv(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, sizeof(rx_creg), rx_creg);
682 }
683
rtl8150_start_xmit(struct sk_buff * skb,struct net_device * netdev)684 static 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 /* 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, count)) {
695 netdev->stats.tx_dropped++;
696 return NETDEV_TX_OK;
697 }
698
699 netif_stop_queue(netdev);
700 dev->tx_skb = skb;
701 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
702 skb->data, count, write_bulk_callback, dev);
703 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
704 /* Can we get/handle EPIPE here? */
705 if (res == -ENODEV)
706 netif_device_detach(dev->netdev);
707 else {
708 dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
709 netdev->stats.tx_errors++;
710 netif_start_queue(netdev);
711 }
712 } else {
713 netdev->stats.tx_packets++;
714 netdev->stats.tx_bytes += skb->len;
715 netif_trans_update(netdev);
716 }
717
718 return NETDEV_TX_OK;
719 }
720
721
set_carrier(struct net_device * netdev)722 static void set_carrier(struct net_device *netdev)
723 {
724 rtl8150_t *dev = netdev_priv(netdev);
725 short tmp;
726
727 get_registers(dev, CSCR, 2, &tmp);
728 if (tmp & CSCR_LINK_STATUS)
729 netif_carrier_on(netdev);
730 else
731 netif_carrier_off(netdev);
732 }
733
rtl8150_open(struct net_device * netdev)734 static int rtl8150_open(struct net_device *netdev)
735 {
736 rtl8150_t *dev = netdev_priv(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, 6, netdev->dev_addr);
745
746 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
747 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
748 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
749 if (res == -ENODEV)
750 netif_device_detach(dev->netdev);
751 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
752 return res;
753 }
754 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
755 dev->intr_buff, INTBUFSIZE, intr_callback,
756 dev, dev->intr_interval);
757 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
758 if (res == -ENODEV)
759 netif_device_detach(dev->netdev);
760 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
761 usb_kill_urb(dev->rx_urb);
762 return res;
763 }
764 enable_net_traffic(dev);
765 set_carrier(netdev);
766 netif_start_queue(netdev);
767
768 return res;
769 }
770
rtl8150_close(struct net_device * netdev)771 static int rtl8150_close(struct net_device *netdev)
772 {
773 rtl8150_t *dev = netdev_priv(netdev);
774
775 netif_stop_queue(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
rtl8150_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)783 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
784 {
785 rtl8150_t *dev = netdev_priv(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->udev, info->bus_info, sizeof(info->bus_info));
790 }
791
rtl8150_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * ecmd)792 static int rtl8150_get_link_ksettings(struct net_device *netdev,
793 struct ethtool_link_ksettings *ecmd)
794 {
795 rtl8150_t *dev = netdev_priv(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, 2, &bmcr);
809 get_registers(dev, ANLP, 2, &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(ecmd->link_modes.supported,
830 supported);
831
832 return 0;
833 }
834
835 static 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
rtl8150_siocdevprivate(struct net_device * netdev,struct ifreq * rq,void __user * udata,int cmd)841 static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
842 void __user *udata, int cmd)
843 {
844 rtl8150_t *dev = netdev_priv(netdev);
845 u16 *data = (u16 *) & rq->ifr_ifru;
846 int res = 0;
847
848 switch (cmd) {
849 case SIOCDEVPRIVATE:
850 data[0] = dev->phy;
851 fallthrough;
852 case SIOCDEVPRIVATE + 1:
853 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
854 break;
855 case SIOCDEVPRIVATE + 2:
856 if (!capable(CAP_NET_ADMIN))
857 return -EPERM;
858 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
859 break;
860 default:
861 res = -EOPNOTSUPP;
862 }
863
864 return res;
865 }
866
867 static 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
rtl8150_probe(struct usb_interface * intf,const struct usb_device_id * id)879 static 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(netdev);
898
899 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
900 if (!dev->intr_buff) {
901 free_netdev(netdev);
902 return -ENOMEM;
903 }
904
905 /* Verify that all required endpoints are present */
906 if (!usb_check_bulk_endpoints(intf, bulk_ep_addr) ||
907 !usb_check_int_endpoints(intf, int_ep_addr)) {
908 dev_err(&intf->dev, "couldn't find required endpoints\n");
909 goto out;
910 }
911
912 tasklet_setup(&dev->tl, 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, dev);
934 SET_NETDEV_DEV(netdev, &intf->dev);
935 if (register_netdev(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
944 out2:
945 usb_set_intfdata(intf, NULL);
946 free_skb_pool(dev);
947 out1:
948 free_all_urbs(dev);
949 out:
950 kfree(dev->intr_buff);
951 free_netdev(netdev);
952 return -EIO;
953 }
954
rtl8150_disconnect(struct usb_interface * intf)955 static 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, &dev->flags);
962 tasklet_kill(&dev->tl);
963 unregister_netdev(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(dev->intr_buff);
969 free_netdev(dev->netdev);
970 }
971 }
972
973 static 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
983 module_usb_driver(rtl8150_driver);
984
985 MODULE_AUTHOR(DRIVER_AUTHOR);
986 MODULE_DESCRIPTION(DRIVER_DESC);
987 MODULE_LICENSE("GPL");
988