Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
[linux-2.6] / drivers / usb / net / 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/sched.h>
10 #include <linux/init.h>
11 #include <linux/signal.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/netdevice.h>
15 #include <linux/etherdevice.h>
16 #include <linux/mii.h>
17 #include <linux/ethtool.h>
18 #include <linux/usb.h>
19 #include <asm/uaccess.h>
20
21 /* Version Information */
22 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
23 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
24 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
25
26 #define IDR                     0x0120
27 #define MAR                     0x0126
28 #define CR                      0x012e
29 #define TCR                     0x012f
30 #define RCR                     0x0130
31 #define TSR                     0x0132
32 #define RSR                     0x0133
33 #define CON0                    0x0135
34 #define CON1                    0x0136
35 #define MSR                     0x0137
36 #define PHYADD                  0x0138
37 #define PHYDAT                  0x0139
38 #define PHYCNT                  0x013b
39 #define GPPC                    0x013d
40 #define BMCR                    0x0140
41 #define BMSR                    0x0142
42 #define ANAR                    0x0144
43 #define ANLP                    0x0146
44 #define AER                     0x0148
45 #define CSCR                    0x014C  /* This one has the link status */
46 #define CSCR_LINK_STATUS        (1 << 3)
47
48 #define IDR_EEPROM              0x1202
49
50 #define PHY_READ                0
51 #define PHY_WRITE               0x20
52 #define PHY_GO                  0x40
53
54 #define MII_TIMEOUT             10
55 #define INTBUFSIZE              8
56
57 #define RTL8150_REQT_READ       0xc0
58 #define RTL8150_REQT_WRITE      0x40
59 #define RTL8150_REQ_GET_REGS    0x05
60 #define RTL8150_REQ_SET_REGS    0x05
61
62
63 /* Transmit status register errors */
64 #define TSR_ECOL                (1<<5)
65 #define TSR_LCOL                (1<<4)
66 #define TSR_LOSS_CRS            (1<<3)
67 #define TSR_JBR                 (1<<2)
68 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
69 /* Receive status register errors */
70 #define RSR_CRC                 (1<<2)
71 #define RSR_FAE                 (1<<1)
72 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
73
74 /* Media status register definitions */
75 #define MSR_DUPLEX              (1<<4)
76 #define MSR_SPEED               (1<<3)
77 #define MSR_LINK                (1<<2)
78
79 /* Interrupt pipe data */
80 #define INT_TSR                 0x00
81 #define INT_RSR                 0x01
82 #define INT_MSR                 0x02
83 #define INT_WAKSR               0x03
84 #define INT_TXOK_CNT            0x04
85 #define INT_RXLOST_CNT          0x05
86 #define INT_CRERR_CNT           0x06
87 #define INT_COL_CNT             0x07
88
89 /* Transmit status register errors */
90 #define TSR_ECOL                (1<<5)
91 #define TSR_LCOL                (1<<4)
92 #define TSR_LOSS_CRS            (1<<3)
93 #define TSR_JBR                 (1<<2)
94 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
95 /* Receive status register errors */
96 #define RSR_CRC                 (1<<2)
97 #define RSR_FAE                 (1<<1)
98 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
99
100 /* Media status register definitions */
101 #define MSR_DUPLEX              (1<<4)
102 #define MSR_SPEED               (1<<3)
103 #define MSR_LINK                (1<<2)
104
105 /* Interrupt pipe data */
106 #define INT_TSR                 0x00
107 #define INT_RSR                 0x01
108 #define INT_MSR                 0x02
109 #define INT_WAKSR               0x03
110 #define INT_TXOK_CNT            0x04
111 #define INT_RXLOST_CNT          0x05
112 #define INT_CRERR_CNT           0x06
113 #define INT_COL_CNT             0x07
114
115
116 #define RTL8150_MTU             1540
117 #define RTL8150_TX_TIMEOUT      (HZ)
118 #define RX_SKB_POOL_SIZE        4
119
120 /* rtl8150 flags */
121 #define RTL8150_HW_CRC          0
122 #define RX_REG_SET              1
123 #define RTL8150_UNPLUG          2
124 #define RX_URB_FAIL             3
125
126 /* Define these values to match your device */
127 #define VENDOR_ID_REALTEK               0x0bda
128 #define VENDOR_ID_MELCO                 0x0411
129 #define VENDOR_ID_MICRONET              0x3980
130 #define VENDOR_ID_LONGSHINE             0x07b8
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_ZYXEL, PRODUCT_ID_PRESTIGE)},
148         {}
149 };
150
151 MODULE_DEVICE_TABLE(usb, rtl8150_table);
152
153 struct rtl8150 {
154         unsigned long flags;
155         struct usb_device *udev;
156         struct tasklet_struct tl;
157         struct net_device_stats stats;
158         struct net_device *netdev;
159         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
160         struct sk_buff *tx_skb, *rx_skb;
161         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
162         spinlock_t rx_pool_lock;
163         struct usb_ctrlrequest dr;
164         int intr_interval;
165         __le16 rx_creg;
166         u8 *intr_buff;
167         u8 phy;
168 };
169
170 typedef struct rtl8150 rtl8150_t;
171
172 static void fill_skb_pool(rtl8150_t *);
173 static void free_skb_pool(rtl8150_t *);
174 static inline struct sk_buff *pull_skb(rtl8150_t *);
175 static void rtl8150_disconnect(struct usb_interface *intf);
176 static int rtl8150_probe(struct usb_interface *intf,
177                            const struct usb_device_id *id);
178 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
179 static int rtl8150_resume(struct usb_interface *intf);
180
181 static const char driver_name [] = "rtl8150";
182
183 static struct usb_driver rtl8150_driver = {
184         .name =         driver_name,
185         .probe =        rtl8150_probe,
186         .disconnect =   rtl8150_disconnect,
187         .id_table =     rtl8150_table,
188         .suspend =      rtl8150_suspend,
189         .resume =       rtl8150_resume
190 };
191
192 /*
193 **
194 **      device related part of the code
195 **
196 */
197 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
198 {
199         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
200                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
201                                indx, 0, data, size, 500);
202 }
203
204 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
205 {
206         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
207                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
208                                indx, 0, data, size, 500);
209 }
210
211 static void ctrl_callback(struct urb *urb)
212 {
213         rtl8150_t *dev;
214
215         switch (urb->status) {
216         case 0:
217                 break;
218         case -EINPROGRESS:
219                 break;
220         case -ENOENT:
221                 break;
222         default:
223                 warn("ctrl urb status %d", urb->status);
224         }
225         dev = urb->context;
226         clear_bit(RX_REG_SET, &dev->flags);
227 }
228
229 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
230 {
231         int ret;
232
233         if (test_bit(RX_REG_SET, &dev->flags))
234                 return -EAGAIN;
235
236         dev->dr.bRequestType = RTL8150_REQT_WRITE;
237         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
238         dev->dr.wValue = cpu_to_le16(indx);
239         dev->dr.wIndex = 0;
240         dev->dr.wLength = cpu_to_le16(size);
241         dev->ctrl_urb->transfer_buffer_length = size;
242         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
243                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
244                          &dev->rx_creg, size, ctrl_callback, dev);
245         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
246                 if (ret == -ENODEV)
247                         netif_device_detach(dev->netdev);
248                 err("control request submission failed: %d", ret);
249         } else
250                 set_bit(RX_REG_SET, &dev->flags);
251
252         return ret;
253 }
254
255 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
256 {
257         int i;
258         u8 data[3], tmp;
259
260         data[0] = phy;
261         data[1] = data[2] = 0;
262         tmp = indx | PHY_READ | PHY_GO;
263         i = 0;
264
265         set_registers(dev, PHYADD, sizeof(data), data);
266         set_registers(dev, PHYCNT, 1, &tmp);
267         do {
268                 get_registers(dev, PHYCNT, 1, data);
269         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
270
271         if (i < MII_TIMEOUT) {
272                 get_registers(dev, PHYDAT, 2, data);
273                 *reg = data[0] | (data[1] << 8);
274                 return 0;
275         } else
276                 return 1;
277 }
278
279 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
280 {
281         int i;
282         u8 data[3], tmp;
283
284         data[0] = phy;
285         *(data + 1) = cpu_to_le16p(&reg);
286         tmp = indx | PHY_WRITE | PHY_GO;
287         i = 0;
288
289         set_registers(dev, PHYADD, sizeof(data), data);
290         set_registers(dev, PHYCNT, 1, &tmp);
291         do {
292                 get_registers(dev, PHYCNT, 1, data);
293         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
294
295         if (i < MII_TIMEOUT)
296                 return 0;
297         else
298                 return 1;
299 }
300
301 static inline void set_ethernet_addr(rtl8150_t * dev)
302 {
303         u8 node_id[6];
304
305         get_registers(dev, IDR, sizeof(node_id), node_id);
306         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
307 }
308
309 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
310 {
311         struct sockaddr *addr = p;
312         rtl8150_t *dev = netdev_priv(netdev);
313         int i;
314
315         if (netif_running(netdev))
316                 return -EBUSY;
317
318         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
319         dbg("%s: Setting MAC address to ", netdev->name);
320         for (i = 0; i < 5; i++)
321                 dbg("%02X:", netdev->dev_addr[i]);
322         dbg("%02X\n", netdev->dev_addr[i]);
323         /* Set the IDR registers. */
324         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
325 #ifdef EEPROM_WRITE
326         {
327         u8 cr;
328         /* Get the CR contents. */
329         get_registers(dev, CR, 1, &cr);
330         /* Set the WEPROM bit (eeprom write enable). */
331         cr |= 0x20;
332         set_registers(dev, CR, 1, &cr);
333         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
334            so we need to split them up. */
335         for (i = 0; i * 2 < netdev->addr_len; i++) {
336                 set_registers(dev, IDR_EEPROM + (i * 2), 2, 
337                 netdev->dev_addr + (i * 2));
338         }
339         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
340         cr &= 0xdf;
341         set_registers(dev, CR, 1, &cr);
342         }
343 #endif
344         return 0;
345 }
346
347 static int rtl8150_reset(rtl8150_t * dev)
348 {
349         u8 data = 0x10;
350         int i = HZ;
351
352         set_registers(dev, CR, 1, &data);
353         do {
354                 get_registers(dev, CR, 1, &data);
355         } while ((data & 0x10) && --i);
356
357         return (i > 0) ? 1 : 0;
358 }
359
360 static int alloc_all_urbs(rtl8150_t * dev)
361 {
362         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
363         if (!dev->rx_urb)
364                 return 0;
365         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
366         if (!dev->tx_urb) {
367                 usb_free_urb(dev->rx_urb);
368                 return 0;
369         }
370         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
371         if (!dev->intr_urb) {
372                 usb_free_urb(dev->rx_urb);
373                 usb_free_urb(dev->tx_urb);
374                 return 0;
375         }
376         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
377         if (!dev->intr_urb) {
378                 usb_free_urb(dev->rx_urb);
379                 usb_free_urb(dev->tx_urb);
380                 usb_free_urb(dev->intr_urb);
381                 return 0;
382         }
383
384         return 1;
385 }
386
387 static void free_all_urbs(rtl8150_t * dev)
388 {
389         usb_free_urb(dev->rx_urb);
390         usb_free_urb(dev->tx_urb);
391         usb_free_urb(dev->intr_urb);
392         usb_free_urb(dev->ctrl_urb);
393 }
394
395 static void unlink_all_urbs(rtl8150_t * dev)
396 {
397         usb_kill_urb(dev->rx_urb);
398         usb_kill_urb(dev->tx_urb);
399         usb_kill_urb(dev->intr_urb);
400         usb_kill_urb(dev->ctrl_urb);
401 }
402
403 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
404 {
405         struct sk_buff *skb;
406         int i;
407
408         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
409                 if (dev->rx_skb_pool[i]) {
410                         skb = dev->rx_skb_pool[i];
411                         dev->rx_skb_pool[i] = NULL;
412                         return skb;
413                 }
414         }
415         return NULL;
416 }
417
418 static void read_bulk_callback(struct urb *urb)
419 {
420         rtl8150_t *dev;
421         unsigned pkt_len, res;
422         struct sk_buff *skb;
423         struct net_device *netdev;
424         u16 rx_stat;
425         int status;
426
427         dev = urb->context;
428         if (!dev)
429                 return;
430         if (test_bit(RTL8150_UNPLUG, &dev->flags))
431                 return;
432         netdev = dev->netdev;
433         if (!netif_device_present(netdev))
434                 return;
435
436         switch (urb->status) {
437         case 0:
438                 break;
439         case -ENOENT:
440                 return; /* the urb is in unlink state */
441         case -ETIME:
442                 warn("may be reset is needed?..");
443                 goto goon;
444         default:
445                 warn("Rx status %d", urb->status);
446                 goto goon;
447         }
448
449         if (!dev->rx_skb)
450                 goto resched;
451         /* protect against short packets (tell me why we got some?!?) */
452         if (urb->actual_length < 4)
453                 goto goon;
454
455         res = urb->actual_length;
456         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
457         pkt_len = res - 4;
458
459         skb_put(dev->rx_skb, pkt_len);
460         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
461         netif_rx(dev->rx_skb);
462         dev->stats.rx_packets++;
463         dev->stats.rx_bytes += pkt_len;
464
465         spin_lock(&dev->rx_pool_lock);
466         skb = pull_skb(dev);
467         spin_unlock(&dev->rx_pool_lock);
468         if (!skb)
469                 goto resched;
470
471         dev->rx_skb = skb;
472 goon:
473         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
474                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
475         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
476         if (status == -ENODEV)
477                 netif_device_detach(dev->netdev);
478         else if (status) {
479                 set_bit(RX_URB_FAIL, &dev->flags);
480                 goto resched;
481         } else {
482                 clear_bit(RX_URB_FAIL, &dev->flags);
483         }
484
485         return;
486 resched:
487         tasklet_schedule(&dev->tl);
488 }
489
490 static void rx_fixup(unsigned long data)
491 {
492         rtl8150_t *dev;
493         struct sk_buff *skb;
494         int status;
495
496         dev = (rtl8150_t *)data;
497
498         spin_lock_irq(&dev->rx_pool_lock);
499         fill_skb_pool(dev);
500         spin_unlock_irq(&dev->rx_pool_lock);
501         if (test_bit(RX_URB_FAIL, &dev->flags))
502                 if (dev->rx_skb)
503                         goto try_again;
504         spin_lock_irq(&dev->rx_pool_lock);
505         skb = pull_skb(dev);
506         spin_unlock_irq(&dev->rx_pool_lock);
507         if (skb == NULL)
508                 goto tlsched;
509         dev->rx_skb = skb;
510         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
511                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
512 try_again:
513         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
514         if (status == -ENODEV) {
515                 netif_device_detach(dev->netdev);
516         } else if (status) {
517                 set_bit(RX_URB_FAIL, &dev->flags);
518                 goto tlsched;
519         } else {
520                 clear_bit(RX_URB_FAIL, &dev->flags);
521         }
522
523         return;
524 tlsched:
525         tasklet_schedule(&dev->tl);
526 }
527
528 static void write_bulk_callback(struct urb *urb)
529 {
530         rtl8150_t *dev;
531
532         dev = urb->context;
533         if (!dev)
534                 return;
535         dev_kfree_skb_irq(dev->tx_skb);
536         if (!netif_device_present(dev->netdev))
537                 return;
538         if (urb->status)
539                 info("%s: Tx status %d", dev->netdev->name, urb->status);
540         dev->netdev->trans_start = jiffies;
541         netif_wake_queue(dev->netdev);
542 }
543
544 static void intr_callback(struct urb *urb)
545 {
546         rtl8150_t *dev;
547         __u8 *d;
548         int status;
549
550         dev = urb->context;
551         if (!dev)
552                 return;
553         switch (urb->status) {
554         case 0:                 /* success */
555                 break;
556         case -ECONNRESET:       /* unlink */
557         case -ENOENT:
558         case -ESHUTDOWN:
559                 return;
560         /* -EPIPE:  should clear the halt */
561         default:
562                 info("%s: intr status %d", dev->netdev->name, urb->status);
563                 goto resubmit;
564         }
565
566         d = urb->transfer_buffer;
567         if (d[0] & TSR_ERRORS) {
568                 dev->stats.tx_errors++;
569                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
570                         dev->stats.tx_aborted_errors++;
571                 if (d[INT_TSR] & TSR_LCOL)
572                         dev->stats.tx_window_errors++;
573                 if (d[INT_TSR] & TSR_LOSS_CRS)
574                         dev->stats.tx_carrier_errors++;
575         }
576         /* Report link status changes to the network stack */
577         if ((d[INT_MSR] & MSR_LINK) == 0) {
578                 if (netif_carrier_ok(dev->netdev)) {
579                         netif_carrier_off(dev->netdev);
580                         dbg("%s: LINK LOST\n", __func__);
581                 }
582         } else {
583                 if (!netif_carrier_ok(dev->netdev)) {
584                         netif_carrier_on(dev->netdev);
585                         dbg("%s: LINK CAME BACK\n", __func__);
586                 }
587         }
588
589 resubmit:
590         status = usb_submit_urb (urb, SLAB_ATOMIC);
591         if (status == -ENODEV)
592                 netif_device_detach(dev->netdev);
593         else if (status)
594                 err ("can't resubmit intr, %s-%s/input0, status %d",
595                                 dev->udev->bus->bus_name,
596                                 dev->udev->devpath, status);
597 }
598
599 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
600 {
601         rtl8150_t *dev = usb_get_intfdata(intf);
602
603         netif_device_detach(dev->netdev);
604
605         if (netif_running(dev->netdev)) {
606                 usb_kill_urb(dev->rx_urb);
607                 usb_kill_urb(dev->intr_urb);
608         }
609         return 0;
610 }
611
612 static int rtl8150_resume(struct usb_interface *intf)
613 {
614         rtl8150_t *dev = usb_get_intfdata(intf);
615
616         netif_device_attach(dev->netdev);
617         if (netif_running(dev->netdev)) {
618                 dev->rx_urb->status = 0;
619                 dev->rx_urb->actual_length = 0;
620                 read_bulk_callback(dev->rx_urb);
621
622                 dev->intr_urb->status = 0;
623                 dev->intr_urb->actual_length = 0;
624                 intr_callback(dev->intr_urb);
625         }
626         return 0;
627 }
628
629 /*
630 **
631 **      network related part of the code
632 **
633 */
634
635 static void fill_skb_pool(rtl8150_t *dev)
636 {
637         struct sk_buff *skb;
638         int i;
639
640         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
641                 if (dev->rx_skb_pool[i])
642                         continue;
643                 skb = dev_alloc_skb(RTL8150_MTU + 2);
644                 if (!skb) {
645                         return;
646                 }
647                 skb->dev = dev->netdev;
648                 skb_reserve(skb, 2);
649                 dev->rx_skb_pool[i] = skb;
650         }
651 }
652
653 static void free_skb_pool(rtl8150_t *dev)
654 {
655         int i;
656
657         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
658                 if (dev->rx_skb_pool[i])
659                         dev_kfree_skb(dev->rx_skb_pool[i]);
660 }
661
662 static int enable_net_traffic(rtl8150_t * dev)
663 {
664         u8 cr, tcr, rcr, msr;
665
666         if (!rtl8150_reset(dev)) {
667                 warn("%s - device reset failed", __FUNCTION__);
668         }
669         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
670         rcr = 0x9e;
671         dev->rx_creg = cpu_to_le16(rcr);
672         tcr = 0xd8;
673         cr = 0x0c;
674         if (!(rcr & 0x80))
675                 set_bit(RTL8150_HW_CRC, &dev->flags);
676         set_registers(dev, RCR, 1, &rcr);
677         set_registers(dev, TCR, 1, &tcr);
678         set_registers(dev, CR, 1, &cr);
679         get_registers(dev, MSR, 1, &msr);
680
681         return 0;
682 }
683
684 static void disable_net_traffic(rtl8150_t * dev)
685 {
686         u8 cr;
687
688         get_registers(dev, CR, 1, &cr);
689         cr &= 0xf3;
690         set_registers(dev, CR, 1, &cr);
691 }
692
693 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
694 {
695         return &((rtl8150_t *)netdev_priv(dev))->stats;
696 }
697
698 static void rtl8150_tx_timeout(struct net_device *netdev)
699 {
700         rtl8150_t *dev = netdev_priv(netdev);
701         warn("%s: Tx timeout.", netdev->name);
702         usb_unlink_urb(dev->tx_urb);
703         dev->stats.tx_errors++;
704 }
705
706 static void rtl8150_set_multicast(struct net_device *netdev)
707 {
708         rtl8150_t *dev = netdev_priv(netdev);
709         netif_stop_queue(netdev);
710         if (netdev->flags & IFF_PROMISC) {
711                 dev->rx_creg |= cpu_to_le16(0x0001);
712                 info("%s: promiscuous mode", netdev->name);
713         } else if (netdev->mc_count ||
714                    (netdev->flags & IFF_ALLMULTI)) {
715                 dev->rx_creg &= cpu_to_le16(0xfffe);
716                 dev->rx_creg |= cpu_to_le16(0x0002);
717                 info("%s: allmulti set", netdev->name);
718         } else {
719                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
720                 dev->rx_creg &= cpu_to_le16(0x00fc);
721         }
722         async_set_registers(dev, RCR, 2);
723         netif_wake_queue(netdev);
724 }
725
726 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
727 {
728         rtl8150_t *dev = netdev_priv(netdev);
729         int count, res;
730
731         netif_stop_queue(netdev);
732         count = (skb->len < 60) ? 60 : skb->len;
733         count = (count & 0x3f) ? count : count + 1;
734         dev->tx_skb = skb;
735         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
736                       skb->data, count, write_bulk_callback, dev);
737         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
738                 /* Can we get/handle EPIPE here? */
739                 if (res == -ENODEV)
740                         netif_device_detach(dev->netdev);
741                 else {
742                         warn("failed tx_urb %d\n", res);
743                         dev->stats.tx_errors++;
744                         netif_start_queue(netdev);
745                 }
746         } else {
747                 dev->stats.tx_packets++;
748                 dev->stats.tx_bytes += skb->len;
749                 netdev->trans_start = jiffies;
750         }
751
752         return 0;
753 }
754
755
756 static void set_carrier(struct net_device *netdev)
757 {
758         rtl8150_t *dev = netdev_priv(netdev);
759         short tmp;
760
761         get_registers(dev, CSCR, 2, &tmp);
762         if (tmp & CSCR_LINK_STATUS)
763                 netif_carrier_on(netdev);
764         else
765                 netif_carrier_off(netdev);
766 }
767
768 static int rtl8150_open(struct net_device *netdev)
769 {
770         rtl8150_t *dev = netdev_priv(netdev);
771         int res;
772
773         if (dev->rx_skb == NULL)
774                 dev->rx_skb = pull_skb(dev);
775         if (!dev->rx_skb)
776                 return -ENOMEM;
777
778         set_registers(dev, IDR, 6, netdev->dev_addr);
779         
780         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
781                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
782         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
783                 if (res == -ENODEV)
784                         netif_device_detach(dev->netdev);
785                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
786                 return res;
787         }
788         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
789                      dev->intr_buff, INTBUFSIZE, intr_callback,
790                      dev, dev->intr_interval);
791         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
792                 if (res == -ENODEV)
793                         netif_device_detach(dev->netdev);
794                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
795                 usb_kill_urb(dev->rx_urb);
796                 return res;
797         }
798         enable_net_traffic(dev);
799         set_carrier(netdev);
800         netif_start_queue(netdev);
801
802         return res;
803 }
804
805 static int rtl8150_close(struct net_device *netdev)
806 {
807         rtl8150_t *dev = netdev_priv(netdev);
808         int res = 0;
809
810         netif_stop_queue(netdev);
811         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
812                 disable_net_traffic(dev);
813         unlink_all_urbs(dev);
814
815         return res;
816 }
817
818 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
819 {
820         rtl8150_t *dev = netdev_priv(netdev);
821
822         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
823         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
824         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
825 }
826
827 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
828 {
829         rtl8150_t *dev = netdev_priv(netdev);
830         short lpa, bmcr;
831
832         ecmd->supported = (SUPPORTED_10baseT_Half |
833                           SUPPORTED_10baseT_Full |
834                           SUPPORTED_100baseT_Half |
835                           SUPPORTED_100baseT_Full |
836                           SUPPORTED_Autoneg |
837                           SUPPORTED_TP | SUPPORTED_MII);
838         ecmd->port = PORT_TP;
839         ecmd->transceiver = XCVR_INTERNAL;
840         ecmd->phy_address = dev->phy;
841         get_registers(dev, BMCR, 2, &bmcr);
842         get_registers(dev, ANLP, 2, &lpa);
843         if (bmcr & BMCR_ANENABLE) {
844                 ecmd->autoneg = AUTONEG_ENABLE;
845                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
846                              SPEED_100 : SPEED_10;
847                 if (ecmd->speed == SPEED_100)
848                         ecmd->duplex = (lpa & LPA_100FULL) ?
849                             DUPLEX_FULL : DUPLEX_HALF;
850                 else
851                         ecmd->duplex = (lpa & LPA_10FULL) ?
852                             DUPLEX_FULL : DUPLEX_HALF;
853         } else {
854                 ecmd->autoneg = AUTONEG_DISABLE;
855                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
856                     SPEED_100 : SPEED_10;
857                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
858                     DUPLEX_FULL : DUPLEX_HALF;
859         }
860         return 0;
861 }
862
863 static struct ethtool_ops ops = {
864         .get_drvinfo = rtl8150_get_drvinfo,
865         .get_settings = rtl8150_get_settings,
866         .get_link = ethtool_op_get_link
867 };
868
869 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
870 {
871         rtl8150_t *dev = netdev_priv(netdev);
872         u16 *data = (u16 *) & rq->ifr_ifru;
873         int res = 0;
874
875         switch (cmd) {
876         case SIOCDEVPRIVATE:
877                 data[0] = dev->phy;
878         case SIOCDEVPRIVATE + 1:
879                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
880                 break;
881         case SIOCDEVPRIVATE + 2:
882                 if (!capable(CAP_NET_ADMIN))
883                         return -EPERM;
884                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
885                 break;
886         default:
887                 res = -EOPNOTSUPP;
888         }
889
890         return res;
891 }
892
893 static int rtl8150_probe(struct usb_interface *intf,
894                          const struct usb_device_id *id)
895 {
896         struct usb_device *udev = interface_to_usbdev(intf);
897         rtl8150_t *dev;
898         struct net_device *netdev;
899
900         netdev = alloc_etherdev(sizeof(rtl8150_t));
901         if (!netdev) {
902                 err("Out of memory");
903                 return -ENOMEM;
904         }
905
906         dev = netdev_priv(netdev);
907         memset(dev, 0, sizeof(rtl8150_t));
908
909         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
910         if (!dev->intr_buff) {
911                 free_netdev(netdev);
912                 return -ENOMEM;
913         }
914
915         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
916         spin_lock_init(&dev->rx_pool_lock);
917         
918         dev->udev = udev;
919         dev->netdev = netdev;
920         SET_MODULE_OWNER(netdev);
921         netdev->open = rtl8150_open;
922         netdev->stop = rtl8150_close;
923         netdev->do_ioctl = rtl8150_ioctl;
924         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
925         netdev->tx_timeout = rtl8150_tx_timeout;
926         netdev->hard_start_xmit = rtl8150_start_xmit;
927         netdev->set_multicast_list = rtl8150_set_multicast;
928         netdev->set_mac_address = rtl8150_set_mac_address;
929         netdev->get_stats = rtl8150_netdev_stats;
930         netdev->mtu = RTL8150_MTU;
931         SET_ETHTOOL_OPS(netdev, &ops);
932         dev->intr_interval = 100;       /* 100ms */
933
934         if (!alloc_all_urbs(dev)) {
935                 err("out of memory");
936                 goto out;
937         }
938         if (!rtl8150_reset(dev)) {
939                 err("couldn't reset the device");
940                 goto out1;
941         }
942         fill_skb_pool(dev);
943         set_ethernet_addr(dev);
944         
945         usb_set_intfdata(intf, dev);
946         SET_NETDEV_DEV(netdev, &intf->dev);
947         if (register_netdev(netdev) != 0) {
948                 err("couldn't register the device");
949                 goto out2;
950         }
951
952         info("%s: rtl8150 is detected", netdev->name);
953
954         return 0;
955
956 out2:
957         usb_set_intfdata(intf, NULL);
958         free_skb_pool(dev);
959 out1:
960         free_all_urbs(dev);
961 out:
962         kfree(dev->intr_buff);
963         free_netdev(netdev);
964         return -EIO;
965 }
966
967 static void rtl8150_disconnect(struct usb_interface *intf)
968 {
969         rtl8150_t *dev = usb_get_intfdata(intf);
970
971         usb_set_intfdata(intf, NULL);
972         if (dev) {
973                 set_bit(RTL8150_UNPLUG, &dev->flags);
974                 tasklet_disable(&dev->tl);
975                 tasklet_kill(&dev->tl);
976                 unregister_netdev(dev->netdev);
977                 unlink_all_urbs(dev);
978                 free_all_urbs(dev);
979                 free_skb_pool(dev);
980                 if (dev->rx_skb)
981                         dev_kfree_skb(dev->rx_skb);
982                 kfree(dev->intr_buff);
983                 free_netdev(dev->netdev);
984         }
985 }
986
987 static int __init usb_rtl8150_init(void)
988 {
989         info(DRIVER_DESC " " DRIVER_VERSION);
990         return usb_register(&rtl8150_driver);
991 }
992
993 static void __exit usb_rtl8150_exit(void)
994 {
995         usb_deregister(&rtl8150_driver);
996 }
997
998 module_init(usb_rtl8150_init);
999 module_exit(usb_rtl8150_exit);
1000
1001 MODULE_AUTHOR(DRIVER_AUTHOR);
1002 MODULE_DESCRIPTION(DRIVER_DESC);
1003 MODULE_LICENSE("GPL");