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 */ |
112 | static 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 | |
122 | MODULE_DEVICE_TABLE(usb, rtl8150_table); |
123 | |
124 | struct 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 | |
139 | typedef struct rtl8150 rtl8150_t; |
140 | |
141 | struct async_req { |
142 | struct usb_ctrlrequest dr; |
143 | u16 rx_creg; |
144 | }; |
145 | |
146 | static const char driver_name [] = "rtl8150" ; |
147 | |
148 | /* |
149 | ** |
150 | ** device related part of the code |
151 | ** |
152 | */ |
153 | static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data) |
154 | { |
155 | return usb_control_msg_recv(dev: dev->udev, endpoint: 0, RTL8150_REQ_GET_REGS, |
156 | RTL8150_REQT_READ, value: indx, index: 0, data, size, |
157 | timeout: 1000, GFP_NOIO); |
158 | } |
159 | |
160 | static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data) |
161 | { |
162 | return usb_control_msg_send(dev: dev->udev, endpoint: 0, RTL8150_REQ_SET_REGS, |
163 | RTL8150_REQT_WRITE, value: indx, index: 0, data, size, |
164 | timeout: 1000, GFP_NOIO); |
165 | } |
166 | |
167 | static 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(objp: req); |
175 | usb_free_urb(urb); |
176 | } |
177 | |
178 | static 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(size: sizeof(struct async_req), GFP_ATOMIC); |
185 | if (req == NULL) |
186 | return res; |
187 | async_urb = usb_alloc_urb(iso_packets: 0, GFP_ATOMIC); |
188 | if (async_urb == NULL) { |
189 | kfree(objp: 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(urb: async_urb, dev: dev->udev, |
199 | usb_sndctrlpipe(dev->udev, 0), setup_packet: (void *)&req->dr, |
200 | transfer_buffer: &req->rx_creg, buffer_length: size, complete_fn: async_set_reg_cb, context: req); |
201 | res = usb_submit_urb(urb: async_urb, GFP_ATOMIC); |
202 | if (res) { |
203 | if (res == -ENODEV) |
204 | netif_device_detach(dev: dev->netdev); |
205 | dev_err(&dev->udev->dev, "%s failed with %d\n" , __func__, res); |
206 | } |
207 | return res; |
208 | } |
209 | |
210 | static 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, size: sizeof(data), data); |
221 | set_registers(dev, PHYCNT, size: 1, data: &tmp); |
222 | do { |
223 | get_registers(dev, PHYCNT, size: 1, data); |
224 | } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT)); |
225 | |
226 | if (i <= MII_TIMEOUT) { |
227 | get_registers(dev, PHYDAT, size: 2, data); |
228 | *reg = data[0] | (data[1] << 8); |
229 | return 0; |
230 | } else |
231 | return 1; |
232 | } |
233 | |
234 | static 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, size: sizeof(data), data); |
246 | set_registers(dev, PHYCNT, size: 1, data: &tmp); |
247 | do { |
248 | get_registers(dev, PHYCNT, size: 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 | |
257 | static void set_ethernet_addr(rtl8150_t *dev) |
258 | { |
259 | u8 node_id[ETH_ALEN]; |
260 | int ret; |
261 | |
262 | ret = get_registers(dev, IDR, size: sizeof(node_id), data: node_id); |
263 | |
264 | if (!ret) { |
265 | eth_hw_addr_set(dev: dev->netdev, addr: node_id); |
266 | } else { |
267 | eth_hw_addr_random(dev: dev->netdev); |
268 | netdev_notice(dev: dev->netdev, format: "Assigned a random MAC address: %pM\n" , |
269 | dev->netdev->dev_addr); |
270 | } |
271 | } |
272 | |
273 | static int rtl8150_set_mac_address(struct net_device *netdev, void *p) |
274 | { |
275 | struct sockaddr *addr = p; |
276 | rtl8150_t *dev = netdev_priv(dev: netdev); |
277 | |
278 | if (netif_running(dev: netdev)) |
279 | return -EBUSY; |
280 | |
281 | eth_hw_addr_set(dev: netdev, addr: 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, size: netdev->addr_len, data: 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 | |
308 | static int rtl8150_reset(rtl8150_t * dev) |
309 | { |
310 | u8 data = 0x10; |
311 | int i = HZ; |
312 | |
313 | set_registers(dev, CR, size: 1, data: &data); |
314 | do { |
315 | get_registers(dev, CR, size: 1, data: &data); |
316 | } while ((data & 0x10) && --i); |
317 | |
318 | return (i > 0) ? 1 : 0; |
319 | } |
320 | |
321 | static int alloc_all_urbs(rtl8150_t * dev) |
322 | { |
323 | dev->rx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
324 | if (!dev->rx_urb) |
325 | return 0; |
326 | dev->tx_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
327 | if (!dev->tx_urb) { |
328 | usb_free_urb(urb: dev->rx_urb); |
329 | return 0; |
330 | } |
331 | dev->intr_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
332 | if (!dev->intr_urb) { |
333 | usb_free_urb(urb: dev->rx_urb); |
334 | usb_free_urb(urb: dev->tx_urb); |
335 | return 0; |
336 | } |
337 | |
338 | return 1; |
339 | } |
340 | |
341 | static void free_all_urbs(rtl8150_t * dev) |
342 | { |
343 | usb_free_urb(urb: dev->rx_urb); |
344 | usb_free_urb(urb: dev->tx_urb); |
345 | usb_free_urb(urb: dev->intr_urb); |
346 | } |
347 | |
348 | static void unlink_all_urbs(rtl8150_t * dev) |
349 | { |
350 | usb_kill_urb(urb: dev->rx_urb); |
351 | usb_kill_urb(urb: dev->tx_urb); |
352 | usb_kill_urb(urb: dev->intr_urb); |
353 | } |
354 | |
355 | static 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 | |
370 | static 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(dev: 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(skb: dev->rx_skb, len: pkt_len); |
414 | dev->rx_skb->protocol = eth_type_trans(skb: dev->rx_skb, dev: netdev); |
415 | netif_rx(skb: 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(lock: &dev->rx_pool_lock, flags); |
422 | if (!skb) |
423 | goto resched; |
424 | |
425 | dev->rx_skb = skb; |
426 | goon: |
427 | usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1), |
428 | transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev); |
429 | result = usb_submit_urb(urb: dev->rx_urb, GFP_ATOMIC); |
430 | if (result == -ENODEV) |
431 | netif_device_detach(dev: dev->netdev); |
432 | else if (result) { |
433 | set_bit(RX_URB_FAIL, addr: &dev->flags); |
434 | goto resched; |
435 | } else { |
436 | clear_bit(RX_URB_FAIL, addr: &dev->flags); |
437 | } |
438 | |
439 | return; |
440 | resched: |
441 | tasklet_schedule(t: &dev->tl); |
442 | } |
443 | |
444 | static 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(skb: dev->tx_skb); |
453 | if (!netif_device_present(dev: 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: dev->netdev); |
459 | netif_wake_queue(dev: dev->netdev); |
460 | } |
461 | |
462 | static 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: dev->netdev)) { |
499 | netif_carrier_off(dev: dev->netdev); |
500 | netdev_dbg(dev->netdev, "%s: LINK LOST\n" , __func__); |
501 | } |
502 | } else { |
503 | if (!netif_carrier_ok(dev: dev->netdev)) { |
504 | netif_carrier_on(dev: dev->netdev); |
505 | netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n" , __func__); |
506 | } |
507 | } |
508 | |
509 | resubmit: |
510 | res = usb_submit_urb (urb, GFP_ATOMIC); |
511 | if (res == -ENODEV) |
512 | netif_device_detach(dev: 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 | |
519 | static 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: dev->netdev); |
524 | |
525 | if (netif_running(dev: dev->netdev)) { |
526 | usb_kill_urb(urb: dev->rx_urb); |
527 | usb_kill_urb(urb: dev->intr_urb); |
528 | } |
529 | return 0; |
530 | } |
531 | |
532 | static int rtl8150_resume(struct usb_interface *intf) |
533 | { |
534 | rtl8150_t *dev = usb_get_intfdata(intf); |
535 | |
536 | netif_device_attach(dev: dev->netdev); |
537 | if (netif_running(dev: dev->netdev)) { |
538 | dev->rx_urb->status = 0; |
539 | dev->rx_urb->actual_length = 0; |
540 | read_bulk_callback(urb: dev->rx_urb); |
541 | |
542 | dev->intr_urb->status = 0; |
543 | dev->intr_urb->actual_length = 0; |
544 | intr_callback(urb: dev->intr_urb); |
545 | } |
546 | return 0; |
547 | } |
548 | |
549 | /* |
550 | ** |
551 | ** network related part of the code |
552 | ** |
553 | */ |
554 | |
555 | static 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, len: 2); |
568 | dev->rx_skb_pool[i] = skb; |
569 | } |
570 | } |
571 | |
572 | static 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 | |
580 | static 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(lock: &dev->rx_pool_lock); |
587 | fill_skb_pool(dev); |
588 | spin_unlock_irq(lock: &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(lock: &dev->rx_pool_lock); |
593 | skb = pull_skb(dev); |
594 | spin_unlock_irq(lock: &dev->rx_pool_lock); |
595 | if (skb == NULL) |
596 | goto tlsched; |
597 | dev->rx_skb = skb; |
598 | usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1), |
599 | transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev); |
600 | try_again: |
601 | status = usb_submit_urb(urb: dev->rx_urb, GFP_ATOMIC); |
602 | if (status == -ENODEV) { |
603 | netif_device_detach(dev: dev->netdev); |
604 | } else if (status) { |
605 | set_bit(RX_URB_FAIL, addr: &dev->flags); |
606 | goto tlsched; |
607 | } else { |
608 | clear_bit(RX_URB_FAIL, addr: &dev->flags); |
609 | } |
610 | |
611 | return; |
612 | tlsched: |
613 | tasklet_schedule(t: &dev->tl); |
614 | } |
615 | |
616 | static 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, addr: &dev->flags); |
629 | set_registers(dev, RCR, size: 1, data: &rcr); |
630 | set_registers(dev, TCR, size: 1, data: &tcr); |
631 | set_registers(dev, CR, size: 1, data: &cr); |
632 | get_registers(dev, MSR, size: 1, data: &msr); |
633 | |
634 | return 0; |
635 | } |
636 | |
637 | static void disable_net_traffic(rtl8150_t * dev) |
638 | { |
639 | u8 cr; |
640 | |
641 | get_registers(dev, CR, size: 1, data: &cr); |
642 | cr &= 0xf3; |
643 | set_registers(dev, CR, size: 1, data: &cr); |
644 | } |
645 | |
646 | static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
647 | { |
648 | rtl8150_t *dev = netdev_priv(dev: netdev); |
649 | dev_warn(&netdev->dev, "Tx timeout.\n" ); |
650 | usb_unlink_urb(urb: dev->tx_urb); |
651 | netdev->stats.tx_errors++; |
652 | } |
653 | |
654 | static void rtl8150_set_multicast(struct net_device *netdev) |
655 | { |
656 | rtl8150_t *dev = netdev_priv(dev: netdev); |
657 | u16 rx_creg = 0x9e; |
658 | |
659 | netif_stop_queue(dev: 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, size: sizeof(rx_creg), reg: rx_creg); |
673 | netif_wake_queue(dev: netdev); |
674 | } |
675 | |
676 | static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb, |
677 | struct net_device *netdev) |
678 | { |
679 | rtl8150_t *dev = netdev_priv(dev: netdev); |
680 | int count, res; |
681 | |
682 | netif_stop_queue(dev: 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(urb: dev->tx_urb, dev: dev->udev, usb_sndbulkpipe(dev->udev, 2), |
687 | transfer_buffer: skb->data, buffer_length: count, complete_fn: write_bulk_callback, context: dev); |
688 | if ((res = usb_submit_urb(urb: dev->tx_urb, GFP_ATOMIC))) { |
689 | /* Can we get/handle EPIPE here? */ |
690 | if (res == -ENODEV) |
691 | netif_device_detach(dev: dev->netdev); |
692 | else { |
693 | dev_warn(&netdev->dev, "failed tx_urb %d\n" , res); |
694 | netdev->stats.tx_errors++; |
695 | netif_start_queue(dev: netdev); |
696 | } |
697 | } else { |
698 | netdev->stats.tx_packets++; |
699 | netdev->stats.tx_bytes += skb->len; |
700 | netif_trans_update(dev: netdev); |
701 | } |
702 | |
703 | return NETDEV_TX_OK; |
704 | } |
705 | |
706 | |
707 | static void set_carrier(struct net_device *netdev) |
708 | { |
709 | rtl8150_t *dev = netdev_priv(dev: netdev); |
710 | short tmp; |
711 | |
712 | get_registers(dev, CSCR, size: 2, data: &tmp); |
713 | if (tmp & CSCR_LINK_STATUS) |
714 | netif_carrier_on(dev: netdev); |
715 | else |
716 | netif_carrier_off(dev: netdev); |
717 | } |
718 | |
719 | static int rtl8150_open(struct net_device *netdev) |
720 | { |
721 | rtl8150_t *dev = netdev_priv(dev: 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, size: 6, data: netdev->dev_addr); |
730 | |
731 | usb_fill_bulk_urb(urb: dev->rx_urb, dev: dev->udev, usb_rcvbulkpipe(dev->udev, 1), |
732 | transfer_buffer: dev->rx_skb->data, RTL8150_MTU, complete_fn: read_bulk_callback, context: dev); |
733 | if ((res = usb_submit_urb(urb: dev->rx_urb, GFP_KERNEL))) { |
734 | if (res == -ENODEV) |
735 | netif_device_detach(dev: dev->netdev); |
736 | dev_warn(&netdev->dev, "rx_urb submit failed: %d\n" , res); |
737 | return res; |
738 | } |
739 | usb_fill_int_urb(urb: dev->intr_urb, dev: dev->udev, usb_rcvintpipe(dev->udev, 3), |
740 | transfer_buffer: dev->intr_buff, INTBUFSIZE, complete_fn: intr_callback, |
741 | context: dev, interval: dev->intr_interval); |
742 | if ((res = usb_submit_urb(urb: dev->intr_urb, GFP_KERNEL))) { |
743 | if (res == -ENODEV) |
744 | netif_device_detach(dev: dev->netdev); |
745 | dev_warn(&netdev->dev, "intr_urb submit failed: %d\n" , res); |
746 | usb_kill_urb(urb: dev->rx_urb); |
747 | return res; |
748 | } |
749 | enable_net_traffic(dev); |
750 | set_carrier(netdev); |
751 | netif_start_queue(dev: netdev); |
752 | |
753 | return res; |
754 | } |
755 | |
756 | static int rtl8150_close(struct net_device *netdev) |
757 | { |
758 | rtl8150_t *dev = netdev_priv(dev: netdev); |
759 | |
760 | netif_stop_queue(dev: 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 | |
768 | static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) |
769 | { |
770 | rtl8150_t *dev = netdev_priv(dev: netdev); |
771 | |
772 | strscpy(p: info->driver, q: driver_name, size: sizeof(info->driver)); |
773 | strscpy(p: info->version, DRIVER_VERSION, size: sizeof(info->version)); |
774 | usb_make_path(dev: dev->udev, buf: info->bus_info, size: sizeof(info->bus_info)); |
775 | } |
776 | |
777 | static int rtl8150_get_link_ksettings(struct net_device *netdev, |
778 | struct ethtool_link_ksettings *ecmd) |
779 | { |
780 | rtl8150_t *dev = netdev_priv(dev: 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, size: 2, data: &bmcr); |
793 | get_registers(dev, ANLP, size: 2, data: &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(dst: ecmd->link_modes.supported, |
814 | legacy_u32: supported); |
815 | |
816 | return 0; |
817 | } |
818 | |
819 | static 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 | |
825 | static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq, |
826 | void __user *udata, int cmd) |
827 | { |
828 | rtl8150_t *dev = netdev_priv(dev: 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, phy: dev->phy, indx: (data[1] & 0x1f), reg: &data[3]); |
838 | break; |
839 | case SIOCDEVPRIVATE + 2: |
840 | if (!capable(CAP_NET_ADMIN)) |
841 | return -EPERM; |
842 | write_mii_word(dev, phy: dev->phy, indx: (data[1] & 0x1f), reg: data[2]); |
843 | break; |
844 | default: |
845 | res = -EOPNOTSUPP; |
846 | } |
847 | |
848 | return res; |
849 | } |
850 | |
851 | static 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 | |
863 | static 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(dev: netdev); |
875 | |
876 | dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL); |
877 | if (!dev->intr_buff) { |
878 | free_netdev(dev: netdev); |
879 | return -ENOMEM; |
880 | } |
881 | |
882 | tasklet_setup(t: &dev->tl, callback: 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, data: dev); |
904 | SET_NETDEV_DEV(netdev, &intf->dev); |
905 | if (register_netdev(dev: 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 | |
914 | out2: |
915 | usb_set_intfdata(intf, NULL); |
916 | free_skb_pool(dev); |
917 | out1: |
918 | free_all_urbs(dev); |
919 | out: |
920 | kfree(objp: dev->intr_buff); |
921 | free_netdev(dev: netdev); |
922 | return -EIO; |
923 | } |
924 | |
925 | static 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, addr: &dev->flags); |
932 | tasklet_kill(t: &dev->tl); |
933 | unregister_netdev(dev: 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(objp: dev->intr_buff); |
939 | free_netdev(dev: dev->netdev); |
940 | } |
941 | } |
942 | |
943 | static 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 | |
953 | module_usb_driver(rtl8150_driver); |
954 | |
955 | MODULE_AUTHOR(DRIVER_AUTHOR); |
956 | MODULE_DESCRIPTION(DRIVER_DESC); |
957 | MODULE_LICENSE("GPL" ); |
958 | |