d8664bf18c0000bd77a93426d39a10e0f48b6589
[linux-2.6.git] / drivers / net / usb / rtl8150.c
1 /*
2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * version 2 as published by the Free Software Foundation.
7  */
8
9 #include <linux/init.h>
10 #include <linux/signal.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/mii.h>
16 #include <linux/ethtool.h>
17 #include <linux/usb.h>
18 #include <asm/uaccess.h>
19
20 /* Version Information */
21 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
22 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
23 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
24
25 #define IDR                     0x0120
26 #define MAR                     0x0126
27 #define CR                      0x012e
28 #define TCR                     0x012f
29 #define RCR                     0x0130
30 #define TSR                     0x0132
31 #define RSR                     0x0133
32 #define CON0                    0x0135
33 #define CON1                    0x0136
34 #define MSR                     0x0137
35 #define PHYADD                  0x0138
36 #define PHYDAT                  0x0139
37 #define PHYCNT                  0x013b
38 #define GPPC                    0x013d
39 #define BMCR                    0x0140
40 #define BMSR                    0x0142
41 #define ANAR                    0x0144
42 #define ANLP                    0x0146
43 #define AER                     0x0148
44 #define CSCR                    0x014C  /* This one has the link status */
45 #define CSCR_LINK_STATUS        (1 << 3)
46
47 #define IDR_EEPROM              0x1202
48
49 #define PHY_READ                0
50 #define PHY_WRITE               0x20
51 #define PHY_GO                  0x40
52
53 #define MII_TIMEOUT             10
54 #define INTBUFSIZE              8
55
56 #define RTL8150_REQT_READ       0xc0
57 #define RTL8150_REQT_WRITE      0x40
58 #define RTL8150_REQ_GET_REGS    0x05
59 #define RTL8150_REQ_SET_REGS    0x05
60
61
62 /* Transmit status register errors */
63 #define TSR_ECOL                (1<<5)
64 #define TSR_LCOL                (1<<4)
65 #define TSR_LOSS_CRS            (1<<3)
66 #define TSR_JBR                 (1<<2)
67 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
68 /* Receive status register errors */
69 #define RSR_CRC                 (1<<2)
70 #define RSR_FAE                 (1<<1)
71 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
72
73 /* Media status register definitions */
74 #define MSR_DUPLEX              (1<<4)
75 #define MSR_SPEED               (1<<3)
76 #define MSR_LINK                (1<<2)
77
78 /* Interrupt pipe data */
79 #define INT_TSR                 0x00
80 #define INT_RSR                 0x01
81 #define INT_MSR                 0x02
82 #define INT_WAKSR               0x03
83 #define INT_TXOK_CNT            0x04
84 #define INT_RXLOST_CNT          0x05
85 #define INT_CRERR_CNT           0x06
86 #define INT_COL_CNT             0x07
87
88 /* Transmit status register errors */
89 #define TSR_ECOL                (1<<5)
90 #define TSR_LCOL                (1<<4)
91 #define TSR_LOSS_CRS            (1<<3)
92 #define TSR_JBR                 (1<<2)
93 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
94 /* Receive status register errors */
95 #define RSR_CRC                 (1<<2)
96 #define RSR_FAE                 (1<<1)
97 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
98
99 /* Media status register definitions */
100 #define MSR_DUPLEX              (1<<4)
101 #define MSR_SPEED               (1<<3)
102 #define MSR_LINK                (1<<2)
103
104 /* Interrupt pipe data */
105 #define INT_TSR                 0x00
106 #define INT_RSR                 0x01
107 #define INT_MSR                 0x02
108 #define INT_WAKSR               0x03
109 #define INT_TXOK_CNT            0x04
110 #define INT_RXLOST_CNT          0x05
111 #define INT_CRERR_CNT           0x06
112 #define INT_COL_CNT             0x07
113
114
115 #define RTL8150_MTU             1540
116 #define RTL8150_TX_TIMEOUT      (HZ)
117 #define RX_SKB_POOL_SIZE        4
118
119 /* rtl8150 flags */
120 #define RTL8150_HW_CRC          0
121 #define RX_REG_SET              1
122 #define RTL8150_UNPLUG          2
123 #define RX_URB_FAIL             3
124
125 /* Define these values to match your device */
126 #define VENDOR_ID_REALTEK               0x0bda
127 #define VENDOR_ID_MELCO                 0x0411
128 #define VENDOR_ID_MICRONET              0x3980
129 #define VENDOR_ID_LONGSHINE             0x07b8
130 #define VENDOR_ID_OQO                   0x1557
131 #define VENDOR_ID_ZYXEL                 0x0586
132
133 #define PRODUCT_ID_RTL8150              0x8150
134 #define PRODUCT_ID_LUAKTX               0x0012
135 #define PRODUCT_ID_LCS8138TX            0x401a
136 #define PRODUCT_ID_SP128AR              0x0003
137 #define PRODUCT_ID_PRESTIGE             0x401a
138
139 #undef  EEPROM_WRITE
140
141 /* table of devices that work with this driver */
142 static struct usb_device_id rtl8150_table[] = {
143         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
144         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
145         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
146         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
147         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
148         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
149         {}
150 };
151
152 MODULE_DEVICE_TABLE(usb, rtl8150_table);
153
154 struct rtl8150 {
155         unsigned long flags;
156         struct usb_device *udev;
157         struct tasklet_struct tl;
158         struct net_device_stats stats;
159         struct net_device *netdev;
160         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
161         struct sk_buff *tx_skb, *rx_skb;
162         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
163         spinlock_t rx_pool_lock;
164         struct usb_ctrlrequest dr;
165         int intr_interval;
166         __le16 rx_creg;
167         u8 *intr_buff;
168         u8 phy;
169 };
170
171 typedef struct rtl8150 rtl8150_t;
172
173 static void fill_skb_pool(rtl8150_t *);
174 static void free_skb_pool(rtl8150_t *);
175 static inline struct sk_buff *pull_skb(rtl8150_t *);
176 static void rtl8150_disconnect(struct usb_interface *intf);
177 static int rtl8150_probe(struct usb_interface *intf,
178                            const struct usb_device_id *id);
179 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
180 static int rtl8150_resume(struct usb_interface *intf);
181
182 static const char driver_name [] = "rtl8150";
183
184 static struct usb_driver rtl8150_driver = {
185         .name =         driver_name,
186         .probe =        rtl8150_probe,
187         .disconnect =   rtl8150_disconnect,
188         .id_table =     rtl8150_table,
189         .suspend =      rtl8150_suspend,
190         .resume =       rtl8150_resume
191 };
192
193 /*
194 **
195 **      device related part of the code
196 **
197 */
198 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
199 {
200         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
201                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
202                                indx, 0, data, size, 500);
203 }
204
205 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
206 {
207         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
208                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
209                                indx, 0, data, size, 500);
210 }
211
212 static void ctrl_callback(struct urb *urb)
213 {
214         rtl8150_t *dev;
215         int status = urb->status;
216
217         switch (status) {
218         case 0:
219                 break;
220         case -EINPROGRESS:
221                 break;
222         case -ENOENT:
223                 break;
224         default:
225                 dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
226         }
227         dev = urb->context;
228         clear_bit(RX_REG_SET, &dev->flags);
229 }
230
231 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
232 {
233         int ret;
234
235         if (test_bit(RX_REG_SET, &dev->flags))
236                 return -EAGAIN;
237
238         dev->dr.bRequestType = RTL8150_REQT_WRITE;
239         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
240         dev->dr.wValue = cpu_to_le16(indx);
241         dev->dr.wIndex = 0;
242         dev->dr.wLength = cpu_to_le16(size);
243         dev->ctrl_urb->transfer_buffer_length = size;
244         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
245                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
246                          &dev->rx_creg, size, ctrl_callback, dev);
247         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
248                 if (ret == -ENODEV)
249                         netif_device_detach(dev->netdev);
250                 err("control request submission failed: %d", ret);
251         } else
252                 set_bit(RX_REG_SET, &dev->flags);
253
254         return ret;
255 }
256
257 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
258 {
259         int i;
260         u8 data[3], tmp;
261
262         data[0] = phy;
263         data[1] = data[2] = 0;
264         tmp = indx | PHY_READ | PHY_GO;
265         i = 0;
266
267         set_registers(dev, PHYADD, sizeof(data), data);
268         set_registers(dev, PHYCNT, 1, &tmp);
269         do {
270                 get_registers(dev, PHYCNT, 1, data);
271         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
272
273         if (i < MII_TIMEOUT) {
274                 get_registers(dev, PHYDAT, 2, data);
275                 *reg = data[0] | (data[1] << 8);
276                 return 0;
277         } else
278                 return 1;
279 }
280
281 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
282 {
283         int i;
284         u8 data[3], tmp;
285
286         data[0] = phy;
287         data[1] = reg & 0xff;
288         data[2] = (reg >> 8) & 0xff;
289         tmp = indx | PHY_WRITE | PHY_GO;
290         i = 0;
291
292         set_registers(dev, PHYADD, sizeof(data), data);
293         set_registers(dev, PHYCNT, 1, &tmp);
294         do {
295                 get_registers(dev, PHYCNT, 1, data);
296         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
297
298         if (i < MII_TIMEOUT)
299                 return 0;
300         else
301                 return 1;
302 }
303
304 static inline void set_ethernet_addr(rtl8150_t * dev)
305 {
306         u8 node_id[6];
307
308         get_registers(dev, IDR, sizeof(node_id), node_id);
309         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
310 }
311
312 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
313 {
314         struct sockaddr *addr = p;
315         rtl8150_t *dev = netdev_priv(netdev);
316         int i;
317
318         if (netif_running(netdev))
319                 return -EBUSY;
320
321         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
322         dbg("%s: Setting MAC address to ", netdev->name);
323         for (i = 0; i < 5; i++)
324                 dbg("%02X:", netdev->dev_addr[i]);
325         dbg("%02X\n", netdev->dev_addr[i]);
326         /* Set the IDR registers. */
327         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
328 #ifdef EEPROM_WRITE
329         {
330         u8 cr;
331         /* Get the CR contents. */
332         get_registers(dev, CR, 1, &cr);
333         /* Set the WEPROM bit (eeprom write enable). */
334         cr |= 0x20;
335         set_registers(dev, CR, 1, &cr);
336         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
337            so we need to split them up. */
338         for (i = 0; i * 2 < netdev->addr_len; i++) {
339                 set_registers(dev, IDR_EEPROM + (i * 2), 2, 
340                 netdev->dev_addr + (i * 2));
341         }
342         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
343         cr &= 0xdf;
344         set_registers(dev, CR, 1, &cr);
345         }
346 #endif
347         return 0;
348 }
349
350 static int rtl8150_reset(rtl8150_t * dev)
351 {
352         u8 data = 0x10;
353         int i = HZ;
354
355         set_registers(dev, CR, 1, &data);
356         do {
357                 get_registers(dev, CR, 1, &data);
358         } while ((data & 0x10) && --i);
359
360         return (i > 0) ? 1 : 0;
361 }
362
363 static int alloc_all_urbs(rtl8150_t * dev)
364 {
365         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
366         if (!dev->rx_urb)
367                 return 0;
368         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
369         if (!dev->tx_urb) {
370                 usb_free_urb(dev->rx_urb);
371                 return 0;
372         }
373         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
374         if (!dev->intr_urb) {
375                 usb_free_urb(dev->rx_urb);
376                 usb_free_urb(dev->tx_urb);
377                 return 0;
378         }
379         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
380         if (!dev->ctrl_urb) {
381                 usb_free_urb(dev->rx_urb);
382                 usb_free_urb(dev->tx_urb);
383                 usb_free_urb(dev->intr_urb);
384                 return 0;
385         }
386
387         return 1;
388 }
389
390 static void free_all_urbs(rtl8150_t * dev)
391 {
392         usb_free_urb(dev->rx_urb);
393         usb_free_urb(dev->tx_urb);
394         usb_free_urb(dev->intr_urb);
395         usb_free_urb(dev->ctrl_urb);
396 }
397
398 static void unlink_all_urbs(rtl8150_t * dev)
399 {
400         usb_kill_urb(dev->rx_urb);
401         usb_kill_urb(dev->tx_urb);
402         usb_kill_urb(dev->intr_urb);
403         usb_kill_urb(dev->ctrl_urb);
404 }
405
406 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
407 {
408         struct sk_buff *skb;
409         int i;
410
411         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
412                 if (dev->rx_skb_pool[i]) {
413                         skb = dev->rx_skb_pool[i];
414                         dev->rx_skb_pool[i] = NULL;
415                         return skb;
416                 }
417         }
418         return NULL;
419 }
420
421 static void read_bulk_callback(struct urb *urb)
422 {
423         rtl8150_t *dev;
424         unsigned pkt_len, res;
425         struct sk_buff *skb;
426         struct net_device *netdev;
427         u16 rx_stat;
428         int status = urb->status;
429         int result;
430
431         dev = urb->context;
432         if (!dev)
433                 return;
434         if (test_bit(RTL8150_UNPLUG, &dev->flags))
435                 return;
436         netdev = dev->netdev;
437         if (!netif_device_present(netdev))
438                 return;
439
440         switch (status) {
441         case 0:
442                 break;
443         case -ENOENT:
444                 return; /* the urb is in unlink state */
445         case -ETIME:
446                 dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
447                 goto goon;
448         default:
449                 dev_warn(&urb->dev->dev, "Rx status %d\n", status);
450                 goto goon;
451         }
452
453         if (!dev->rx_skb)
454                 goto resched;
455         /* protect against short packets (tell me why we got some?!?) */
456         if (urb->actual_length < 4)
457                 goto goon;
458
459         res = urb->actual_length;
460         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
461         pkt_len = res - 4;
462
463         skb_put(dev->rx_skb, pkt_len);
464         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
465         netif_rx(dev->rx_skb);
466         dev->stats.rx_packets++;
467         dev->stats.rx_bytes += pkt_len;
468
469         spin_lock(&dev->rx_pool_lock);
470         skb = pull_skb(dev);
471         spin_unlock(&dev->rx_pool_lock);
472         if (!skb)
473                 goto resched;
474
475         dev->rx_skb = skb;
476 goon:
477         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
478                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
479         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
480         if (result == -ENODEV)
481                 netif_device_detach(dev->netdev);
482         else if (result) {
483                 set_bit(RX_URB_FAIL, &dev->flags);
484                 goto resched;
485         } else {
486                 clear_bit(RX_URB_FAIL, &dev->flags);
487         }
488
489         return;
490 resched:
491         tasklet_schedule(&dev->tl);
492 }
493
494 static void rx_fixup(unsigned long data)
495 {
496         rtl8150_t *dev;
497         struct sk_buff *skb;
498         int status;
499
500         dev = (rtl8150_t *)data;
501
502         spin_lock_irq(&dev->rx_pool_lock);
503         fill_skb_pool(dev);
504         spin_unlock_irq(&dev->rx_pool_lock);
505         if (test_bit(RX_URB_FAIL, &dev->flags))
506                 if (dev->rx_skb)
507                         goto try_again;
508         spin_lock_irq(&dev->rx_pool_lock);
509         skb = pull_skb(dev);
510         spin_unlock_irq(&dev->rx_pool_lock);
511         if (skb == NULL)
512                 goto tlsched;
513         dev->rx_skb = skb;
514         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
515                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
516 try_again:
517         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
518         if (status == -ENODEV) {
519                 netif_device_detach(dev->netdev);
520         } else if (status) {
521                 set_bit(RX_URB_FAIL, &dev->flags);
522                 goto tlsched;
523         } else {
524                 clear_bit(RX_URB_FAIL, &dev->flags);
525         }
526
527         return;
528 tlsched:
529         tasklet_schedule(&dev->tl);
530 }
531
532 static void write_bulk_callback(struct urb *urb)
533 {
534         rtl8150_t *dev;
535         int status = urb->status;
536
537         dev = urb->context;
538         if (!dev)
539                 return;
540         dev_kfree_skb_irq(dev->tx_skb);
541         if (!netif_device_present(dev->netdev))
542                 return;
543         if (status)
544                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
545                          dev->netdev->name, status);
546         dev->netdev->trans_start = jiffies;
547         netif_wake_queue(dev->netdev);
548 }
549
550 static void intr_callback(struct urb *urb)
551 {
552         rtl8150_t *dev;
553         __u8 *d;
554         int status = urb->status;
555         int res;
556
557         dev = urb->context;
558         if (!dev)
559                 return;
560         switch (status) {
561         case 0:                 /* success */
562                 break;
563         case -ECONNRESET:       /* unlink */
564         case -ENOENT:
565         case -ESHUTDOWN:
566                 return;
567         /* -EPIPE:  should clear the halt */
568         default:
569                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
570                          dev->netdev->name, status);
571                 goto resubmit;
572         }
573
574         d = urb->transfer_buffer;
575         if (d[0] & TSR_ERRORS) {
576                 dev->stats.tx_errors++;
577                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
578                         dev->stats.tx_aborted_errors++;
579                 if (d[INT_TSR] & TSR_LCOL)
580                         dev->stats.tx_window_errors++;
581                 if (d[INT_TSR] & TSR_LOSS_CRS)
582                         dev->stats.tx_carrier_errors++;
583         }
584         /* Report link status changes to the network stack */
585         if ((d[INT_MSR] & MSR_LINK) == 0) {
586                 if (netif_carrier_ok(dev->netdev)) {
587                         netif_carrier_off(dev->netdev);
588                         dbg("%s: LINK LOST\n", __func__);
589                 }
590         } else {
591                 if (!netif_carrier_ok(dev->netdev)) {
592                         netif_carrier_on(dev->netdev);
593                         dbg("%s: LINK CAME BACK\n", __func__);
594                 }
595         }
596
597 resubmit:
598         res = usb_submit_urb (urb, GFP_ATOMIC);
599         if (res == -ENODEV)
600                 netif_device_detach(dev->netdev);
601         else if (res)
602                 err ("can't resubmit intr, %s-%s/input0, status %d",
603                                 dev->udev->bus->bus_name,
604                                 dev->udev->devpath, res);
605 }
606
607 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
608 {
609         rtl8150_t *dev = usb_get_intfdata(intf);
610
611         netif_device_detach(dev->netdev);
612
613         if (netif_running(dev->netdev)) {
614                 usb_kill_urb(dev->rx_urb);
615                 usb_kill_urb(dev->intr_urb);
616         }
617         return 0;
618 }
619
620 static int rtl8150_resume(struct usb_interface *intf)
621 {
622         rtl8150_t *dev = usb_get_intfdata(intf);
623
624         netif_device_attach(dev->netdev);
625         if (netif_running(dev->netdev)) {
626                 dev->rx_urb->status = 0;
627                 dev->rx_urb->actual_length = 0;
628                 read_bulk_callback(dev->rx_urb);
629
630                 dev->intr_urb->status = 0;
631                 dev->intr_urb->actual_length = 0;
632                 intr_callback(dev->intr_urb);
633         }
634         return 0;
635 }
636
637 /*
638 **
639 **      network related part of the code
640 **
641 */
642
643 static void fill_skb_pool(rtl8150_t *dev)
644 {
645         struct sk_buff *skb;
646         int i;
647
648         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
649                 if (dev->rx_skb_pool[i])
650                         continue;
651                 skb = dev_alloc_skb(RTL8150_MTU + 2);
652                 if (!skb) {
653                         return;
654                 }
655                 skb_reserve(skb, 2);
656                 dev->rx_skb_pool[i] = skb;
657         }
658 }
659
660 static void free_skb_pool(rtl8150_t *dev)
661 {
662         int i;
663
664         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
665                 if (dev->rx_skb_pool[i])
666                         dev_kfree_skb(dev->rx_skb_pool[i]);
667 }
668
669 static int enable_net_traffic(rtl8150_t * dev)
670 {
671         u8 cr, tcr, rcr, msr;
672
673         if (!rtl8150_reset(dev)) {
674                 dev_warn(&dev->udev->dev, "device reset failed\n");
675         }
676         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
677         rcr = 0x9e;
678         dev->rx_creg = cpu_to_le16(rcr);
679         tcr = 0xd8;
680         cr = 0x0c;
681         if (!(rcr & 0x80))
682                 set_bit(RTL8150_HW_CRC, &dev->flags);
683         set_registers(dev, RCR, 1, &rcr);
684         set_registers(dev, TCR, 1, &tcr);
685         set_registers(dev, CR, 1, &cr);
686         get_registers(dev, MSR, 1, &msr);
687
688         return 0;
689 }
690
691 static void disable_net_traffic(rtl8150_t * dev)
692 {
693         u8 cr;
694
695         get_registers(dev, CR, 1, &cr);
696         cr &= 0xf3;
697         set_registers(dev, CR, 1, &cr);
698 }
699
700 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
701 {
702         return &((rtl8150_t *)netdev_priv(dev))->stats;
703 }
704
705 static void rtl8150_tx_timeout(struct net_device *netdev)
706 {
707         rtl8150_t *dev = netdev_priv(netdev);
708         dev_warn(&netdev->dev, "Tx timeout.\n");
709         usb_unlink_urb(dev->tx_urb);
710         dev->stats.tx_errors++;
711 }
712
713 static void rtl8150_set_multicast(struct net_device *netdev)
714 {
715         rtl8150_t *dev = netdev_priv(netdev);
716         netif_stop_queue(netdev);
717         if (netdev->flags & IFF_PROMISC) {
718                 dev->rx_creg |= cpu_to_le16(0x0001);
719                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
720         } else if (netdev->mc_count ||
721                    (netdev->flags & IFF_ALLMULTI)) {
722                 dev->rx_creg &= cpu_to_le16(0xfffe);
723                 dev->rx_creg |= cpu_to_le16(0x0002);
724                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
725         } else {
726                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
727                 dev->rx_creg &= cpu_to_le16(0x00fc);
728         }
729         async_set_registers(dev, RCR, 2);
730         netif_wake_queue(netdev);
731 }
732
733 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
734 {
735         rtl8150_t *dev = netdev_priv(netdev);
736         int count, res;
737
738         netif_stop_queue(netdev);
739         count = (skb->len < 60) ? 60 : skb->len;
740         count = (count & 0x3f) ? count : count + 1;
741         dev->tx_skb = skb;
742         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
743                       skb->data, count, write_bulk_callback, dev);
744         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
745                 /* Can we get/handle EPIPE here? */
746                 if (res == -ENODEV)
747                         netif_device_detach(dev->netdev);
748                 else {
749                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
750                         dev->stats.tx_errors++;
751                         netif_start_queue(netdev);
752                 }
753         } else {
754                 dev->stats.tx_packets++;
755                 dev->stats.tx_bytes += skb->len;
756                 netdev->trans_start = jiffies;
757         }
758
759         return 0;
760 }
761
762
763 static void set_carrier(struct net_device *netdev)
764 {
765         rtl8150_t *dev = netdev_priv(netdev);
766         short tmp;
767
768         get_registers(dev, CSCR, 2, &tmp);
769         if (tmp & CSCR_LINK_STATUS)
770                 netif_carrier_on(netdev);
771         else
772                 netif_carrier_off(netdev);
773 }
774
775 static int rtl8150_open(struct net_device *netdev)
776 {
777         rtl8150_t *dev = netdev_priv(netdev);
778         int res;
779
780         if (dev->rx_skb == NULL)
781                 dev->rx_skb = pull_skb(dev);
782         if (!dev->rx_skb)
783                 return -ENOMEM;
784
785         set_registers(dev, IDR, 6, netdev->dev_addr);
786         
787         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
788                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
789         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
790                 if (res == -ENODEV)
791                         netif_device_detach(dev->netdev);
792                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
793                 return res;
794         }
795         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
796                      dev->intr_buff, INTBUFSIZE, intr_callback,
797                      dev, dev->intr_interval);
798         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
799                 if (res == -ENODEV)
800                         netif_device_detach(dev->netdev);
801                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
802                 usb_kill_urb(dev->rx_urb);
803                 return res;
804         }
805         enable_net_traffic(dev);
806         set_carrier(netdev);
807         netif_start_queue(netdev);
808
809         return res;
810 }
811
812 static int rtl8150_close(struct net_device *netdev)
813 {
814         rtl8150_t *dev = netdev_priv(netdev);
815         int res = 0;
816
817         netif_stop_queue(netdev);
818         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
819                 disable_net_traffic(dev);
820         unlink_all_urbs(dev);
821
822         return res;
823 }
824
825 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
826 {
827         rtl8150_t *dev = netdev_priv(netdev);
828
829         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
830         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
831         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
832 }
833
834 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
835 {
836         rtl8150_t *dev = netdev_priv(netdev);
837         short lpa, bmcr;
838
839         ecmd->supported = (SUPPORTED_10baseT_Half |
840                           SUPPORTED_10baseT_Full |
841                           SUPPORTED_100baseT_Half |
842                           SUPPORTED_100baseT_Full |
843                           SUPPORTED_Autoneg |
844                           SUPPORTED_TP | SUPPORTED_MII);
845         ecmd->port = PORT_TP;
846         ecmd->transceiver = XCVR_INTERNAL;
847         ecmd->phy_address = dev->phy;
848         get_registers(dev, BMCR, 2, &bmcr);
849         get_registers(dev, ANLP, 2, &lpa);
850         if (bmcr & BMCR_ANENABLE) {
851                 ecmd->autoneg = AUTONEG_ENABLE;
852                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
853                              SPEED_100 : SPEED_10;
854                 if (ecmd->speed == SPEED_100)
855                         ecmd->duplex = (lpa & LPA_100FULL) ?
856                             DUPLEX_FULL : DUPLEX_HALF;
857                 else
858                         ecmd->duplex = (lpa & LPA_10FULL) ?
859                             DUPLEX_FULL : DUPLEX_HALF;
860         } else {
861                 ecmd->autoneg = AUTONEG_DISABLE;
862                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
863                     SPEED_100 : SPEED_10;
864                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
865                     DUPLEX_FULL : DUPLEX_HALF;
866         }
867         return 0;
868 }
869
870 static struct ethtool_ops ops = {
871         .get_drvinfo = rtl8150_get_drvinfo,
872         .get_settings = rtl8150_get_settings,
873         .get_link = ethtool_op_get_link
874 };
875
876 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
877 {
878         rtl8150_t *dev = netdev_priv(netdev);
879         u16 *data = (u16 *) & rq->ifr_ifru;
880         int res = 0;
881
882         switch (cmd) {
883         case SIOCDEVPRIVATE:
884                 data[0] = dev->phy;
885         case SIOCDEVPRIVATE + 1:
886                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
887                 break;
888         case SIOCDEVPRIVATE + 2:
889                 if (!capable(CAP_NET_ADMIN))
890                         return -EPERM;
891                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
892                 break;
893         default:
894                 res = -EOPNOTSUPP;
895         }
896
897         return res;
898 }
899
900 static int rtl8150_probe(struct usb_interface *intf,
901                          const struct usb_device_id *id)
902 {
903         struct usb_device *udev = interface_to_usbdev(intf);
904         rtl8150_t *dev;
905         struct net_device *netdev;
906
907         netdev = alloc_etherdev(sizeof(rtl8150_t));
908         if (!netdev) {
909                 err("Out of memory");
910                 return -ENOMEM;
911         }
912
913         dev = netdev_priv(netdev);
914
915         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
916         if (!dev->intr_buff) {
917                 free_netdev(netdev);
918                 return -ENOMEM;
919         }
920
921         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
922         spin_lock_init(&dev->rx_pool_lock);
923         
924         dev->udev = udev;
925         dev->netdev = netdev;
926         netdev->open = rtl8150_open;
927         netdev->stop = rtl8150_close;
928         netdev->do_ioctl = rtl8150_ioctl;
929         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
930         netdev->tx_timeout = rtl8150_tx_timeout;
931         netdev->hard_start_xmit = rtl8150_start_xmit;
932         netdev->set_multicast_list = rtl8150_set_multicast;
933         netdev->set_mac_address = rtl8150_set_mac_address;
934         netdev->get_stats = rtl8150_netdev_stats;
935         SET_ETHTOOL_OPS(netdev, &ops);
936         dev->intr_interval = 100;       /* 100ms */
937
938         if (!alloc_all_urbs(dev)) {
939                 err("out of memory");
940                 goto out;
941         }
942         if (!rtl8150_reset(dev)) {
943                 err("couldn't reset the device");
944                 goto out1;
945         }
946         fill_skb_pool(dev);
947         set_ethernet_addr(dev);
948         
949         usb_set_intfdata(intf, dev);
950         SET_NETDEV_DEV(netdev, &intf->dev);
951         if (register_netdev(netdev) != 0) {
952                 err("couldn't register the device");
953                 goto out2;
954         }
955
956         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
957
958         return 0;
959
960 out2:
961         usb_set_intfdata(intf, NULL);
962         free_skb_pool(dev);
963 out1:
964         free_all_urbs(dev);
965 out:
966         kfree(dev->intr_buff);
967         free_netdev(netdev);
968         return -EIO;
969 }
970
971 static void rtl8150_disconnect(struct usb_interface *intf)
972 {
973         rtl8150_t *dev = usb_get_intfdata(intf);
974
975         usb_set_intfdata(intf, NULL);
976         if (dev) {
977                 set_bit(RTL8150_UNPLUG, &dev->flags);
978                 tasklet_disable(&dev->tl);
979                 tasklet_kill(&dev->tl);
980                 unregister_netdev(dev->netdev);
981                 unlink_all_urbs(dev);
982                 free_all_urbs(dev);
983                 free_skb_pool(dev);
984                 if (dev->rx_skb)
985                         dev_kfree_skb(dev->rx_skb);
986                 kfree(dev->intr_buff);
987                 free_netdev(dev->netdev);
988         }
989 }
990
991 static int __init usb_rtl8150_init(void)
992 {
993         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
994                DRIVER_DESC "\n");
995         return usb_register(&rtl8150_driver);
996 }
997
998 static void __exit usb_rtl8150_exit(void)
999 {
1000         usb_deregister(&rtl8150_driver);
1001 }
1002
1003 module_init(usb_rtl8150_init);
1004 module_exit(usb_rtl8150_exit);
1005
1006 MODULE_AUTHOR(DRIVER_AUTHOR);
1007 MODULE_DESCRIPTION(DRIVER_DESC);
1008 MODULE_LICENSE("GPL");