Merge branch 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / drivers / net / usb / rtl8150.c
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         void *buf;
156         int ret;
157
158         buf = kmalloc(size, GFP_NOIO);
159         if (!buf)
160                 return -ENOMEM;
161
162         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
163                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
164                               indx, 0, buf, size, 500);
165         if (ret > 0 && ret <= size)
166                 memcpy(data, buf, ret);
167         kfree(buf);
168         return ret;
169 }
170
171 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
172 {
173         void *buf;
174         int ret;
175
176         buf = kmemdup(data, size, GFP_NOIO);
177         if (!buf)
178                 return -ENOMEM;
179
180         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
181                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
182                               indx, 0, buf, size, 500);
183         kfree(buf);
184         return ret;
185 }
186
187 static void async_set_reg_cb(struct urb *urb)
188 {
189         struct async_req *req = (struct async_req *)urb->context;
190         int status = urb->status;
191
192         if (status < 0)
193                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
194         kfree(req);
195         usb_free_urb(urb);
196 }
197
198 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
199 {
200         int res = -ENOMEM;
201         struct urb *async_urb;
202         struct async_req *req;
203
204         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
205         if (req == NULL)
206                 return res;
207         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
208         if (async_urb == NULL) {
209                 kfree(req);
210                 return res;
211         }
212         req->rx_creg = cpu_to_le16(reg);
213         req->dr.bRequestType = RTL8150_REQT_WRITE;
214         req->dr.bRequest = RTL8150_REQ_SET_REGS;
215         req->dr.wIndex = 0;
216         req->dr.wValue = cpu_to_le16(indx);
217         req->dr.wLength = cpu_to_le16(size);
218         usb_fill_control_urb(async_urb, dev->udev,
219                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
220                              &req->rx_creg, size, async_set_reg_cb, req);
221         res = usb_submit_urb(async_urb, GFP_ATOMIC);
222         if (res) {
223                 if (res == -ENODEV)
224                         netif_device_detach(dev->netdev);
225                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
226         }
227         return res;
228 }
229
230 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
231 {
232         int i;
233         u8 data[3], tmp;
234
235         data[0] = phy;
236         data[1] = data[2] = 0;
237         tmp = indx | PHY_READ | PHY_GO;
238         i = 0;
239
240         set_registers(dev, PHYADD, sizeof(data), data);
241         set_registers(dev, PHYCNT, 1, &tmp);
242         do {
243                 get_registers(dev, PHYCNT, 1, data);
244         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
245
246         if (i <= MII_TIMEOUT) {
247                 get_registers(dev, PHYDAT, 2, data);
248                 *reg = data[0] | (data[1] << 8);
249                 return 0;
250         } else
251                 return 1;
252 }
253
254 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
255 {
256         int i;
257         u8 data[3], tmp;
258
259         data[0] = phy;
260         data[1] = reg & 0xff;
261         data[2] = (reg >> 8) & 0xff;
262         tmp = indx | PHY_WRITE | 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                 return 0;
273         else
274                 return 1;
275 }
276
277 static inline void set_ethernet_addr(rtl8150_t * dev)
278 {
279         u8 node_id[6];
280
281         get_registers(dev, IDR, sizeof(node_id), node_id);
282         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
283 }
284
285 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
286 {
287         struct sockaddr *addr = p;
288         rtl8150_t *dev = netdev_priv(netdev);
289
290         if (netif_running(netdev))
291                 return -EBUSY;
292
293         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
294         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
295         /* Set the IDR registers. */
296         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
297 #ifdef EEPROM_WRITE
298         {
299         int i;
300         u8 cr;
301         /* Get the CR contents. */
302         get_registers(dev, CR, 1, &cr);
303         /* Set the WEPROM bit (eeprom write enable). */
304         cr |= 0x20;
305         set_registers(dev, CR, 1, &cr);
306         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
307            so we need to split them up. */
308         for (i = 0; i * 2 < netdev->addr_len; i++) {
309                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
310                 netdev->dev_addr + (i * 2));
311         }
312         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
313         cr &= 0xdf;
314         set_registers(dev, CR, 1, &cr);
315         }
316 #endif
317         return 0;
318 }
319
320 static int rtl8150_reset(rtl8150_t * dev)
321 {
322         u8 data = 0x10;
323         int i = HZ;
324
325         set_registers(dev, CR, 1, &data);
326         do {
327                 get_registers(dev, CR, 1, &data);
328         } while ((data & 0x10) && --i);
329
330         return (i > 0) ? 1 : 0;
331 }
332
333 static int alloc_all_urbs(rtl8150_t * dev)
334 {
335         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
336         if (!dev->rx_urb)
337                 return 0;
338         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
339         if (!dev->tx_urb) {
340                 usb_free_urb(dev->rx_urb);
341                 return 0;
342         }
343         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
344         if (!dev->intr_urb) {
345                 usb_free_urb(dev->rx_urb);
346                 usb_free_urb(dev->tx_urb);
347                 return 0;
348         }
349
350         return 1;
351 }
352
353 static void free_all_urbs(rtl8150_t * dev)
354 {
355         usb_free_urb(dev->rx_urb);
356         usb_free_urb(dev->tx_urb);
357         usb_free_urb(dev->intr_urb);
358 }
359
360 static void unlink_all_urbs(rtl8150_t * dev)
361 {
362         usb_kill_urb(dev->rx_urb);
363         usb_kill_urb(dev->tx_urb);
364         usb_kill_urb(dev->intr_urb);
365 }
366
367 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
368 {
369         struct sk_buff *skb;
370         int i;
371
372         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
373                 if (dev->rx_skb_pool[i]) {
374                         skb = dev->rx_skb_pool[i];
375                         dev->rx_skb_pool[i] = NULL;
376                         return skb;
377                 }
378         }
379         return NULL;
380 }
381
382 static void read_bulk_callback(struct urb *urb)
383 {
384         rtl8150_t *dev;
385         unsigned pkt_len, res;
386         struct sk_buff *skb;
387         struct net_device *netdev;
388         int status = urb->status;
389         int result;
390         unsigned long flags;
391
392         dev = urb->context;
393         if (!dev)
394                 return;
395         if (test_bit(RTL8150_UNPLUG, &dev->flags))
396                 return;
397         netdev = dev->netdev;
398         if (!netif_device_present(netdev))
399                 return;
400
401         switch (status) {
402         case 0:
403                 break;
404         case -ENOENT:
405                 return; /* the urb is in unlink state */
406         case -ETIME:
407                 if (printk_ratelimit())
408                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
409                 goto goon;
410         default:
411                 if (printk_ratelimit())
412                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
413                 goto goon;
414         }
415
416         if (!dev->rx_skb)
417                 goto resched;
418         /* protect against short packets (tell me why we got some?!?) */
419         if (urb->actual_length < 4)
420                 goto goon;
421
422         res = urb->actual_length;
423         pkt_len = res - 4;
424
425         skb_put(dev->rx_skb, pkt_len);
426         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
427         netif_rx(dev->rx_skb);
428         netdev->stats.rx_packets++;
429         netdev->stats.rx_bytes += pkt_len;
430
431         spin_lock_irqsave(&dev->rx_pool_lock, flags);
432         skb = pull_skb(dev);
433         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
434         if (!skb)
435                 goto resched;
436
437         dev->rx_skb = skb;
438 goon:
439         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
440                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
441         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
442         if (result == -ENODEV)
443                 netif_device_detach(dev->netdev);
444         else if (result) {
445                 set_bit(RX_URB_FAIL, &dev->flags);
446                 goto resched;
447         } else {
448                 clear_bit(RX_URB_FAIL, &dev->flags);
449         }
450
451         return;
452 resched:
453         tasklet_schedule(&dev->tl);
454 }
455
456 static void write_bulk_callback(struct urb *urb)
457 {
458         rtl8150_t *dev;
459         int status = urb->status;
460
461         dev = urb->context;
462         if (!dev)
463                 return;
464         dev_kfree_skb_irq(dev->tx_skb);
465         if (!netif_device_present(dev->netdev))
466                 return;
467         if (status)
468                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
469                          dev->netdev->name, status);
470         netif_trans_update(dev->netdev);
471         netif_wake_queue(dev->netdev);
472 }
473
474 static void intr_callback(struct urb *urb)
475 {
476         rtl8150_t *dev;
477         __u8 *d;
478         int status = urb->status;
479         int res;
480
481         dev = urb->context;
482         if (!dev)
483                 return;
484         switch (status) {
485         case 0:                 /* success */
486                 break;
487         case -ECONNRESET:       /* unlink */
488         case -ENOENT:
489         case -ESHUTDOWN:
490                 return;
491         /* -EPIPE:  should clear the halt */
492         default:
493                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
494                          dev->netdev->name, status);
495                 goto resubmit;
496         }
497
498         d = urb->transfer_buffer;
499         if (d[0] & TSR_ERRORS) {
500                 dev->netdev->stats.tx_errors++;
501                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
502                         dev->netdev->stats.tx_aborted_errors++;
503                 if (d[INT_TSR] & TSR_LCOL)
504                         dev->netdev->stats.tx_window_errors++;
505                 if (d[INT_TSR] & TSR_LOSS_CRS)
506                         dev->netdev->stats.tx_carrier_errors++;
507         }
508         /* Report link status changes to the network stack */
509         if ((d[INT_MSR] & MSR_LINK) == 0) {
510                 if (netif_carrier_ok(dev->netdev)) {
511                         netif_carrier_off(dev->netdev);
512                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
513                 }
514         } else {
515                 if (!netif_carrier_ok(dev->netdev)) {
516                         netif_carrier_on(dev->netdev);
517                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
518                 }
519         }
520
521 resubmit:
522         res = usb_submit_urb (urb, GFP_ATOMIC);
523         if (res == -ENODEV)
524                 netif_device_detach(dev->netdev);
525         else if (res)
526                 dev_err(&dev->udev->dev,
527                         "can't resubmit intr, %s-%s/input0, status %d\n",
528                         dev->udev->bus->bus_name, dev->udev->devpath, res);
529 }
530
531 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
532 {
533         rtl8150_t *dev = usb_get_intfdata(intf);
534
535         netif_device_detach(dev->netdev);
536
537         if (netif_running(dev->netdev)) {
538                 usb_kill_urb(dev->rx_urb);
539                 usb_kill_urb(dev->intr_urb);
540         }
541         return 0;
542 }
543
544 static int rtl8150_resume(struct usb_interface *intf)
545 {
546         rtl8150_t *dev = usb_get_intfdata(intf);
547
548         netif_device_attach(dev->netdev);
549         if (netif_running(dev->netdev)) {
550                 dev->rx_urb->status = 0;
551                 dev->rx_urb->actual_length = 0;
552                 read_bulk_callback(dev->rx_urb);
553
554                 dev->intr_urb->status = 0;
555                 dev->intr_urb->actual_length = 0;
556                 intr_callback(dev->intr_urb);
557         }
558         return 0;
559 }
560
561 /*
562 **
563 **      network related part of the code
564 **
565 */
566
567 static void fill_skb_pool(rtl8150_t *dev)
568 {
569         struct sk_buff *skb;
570         int i;
571
572         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
573                 if (dev->rx_skb_pool[i])
574                         continue;
575                 skb = dev_alloc_skb(RTL8150_MTU + 2);
576                 if (!skb) {
577                         return;
578                 }
579                 skb_reserve(skb, 2);
580                 dev->rx_skb_pool[i] = skb;
581         }
582 }
583
584 static void free_skb_pool(rtl8150_t *dev)
585 {
586         int i;
587
588         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
589                 if (dev->rx_skb_pool[i])
590                         dev_kfree_skb(dev->rx_skb_pool[i]);
591 }
592
593 static void rx_fixup(unsigned long data)
594 {
595         struct rtl8150 *dev = (struct rtl8150 *)data;
596         struct sk_buff *skb;
597         int status;
598
599         spin_lock_irq(&dev->rx_pool_lock);
600         fill_skb_pool(dev);
601         spin_unlock_irq(&dev->rx_pool_lock);
602         if (test_bit(RX_URB_FAIL, &dev->flags))
603                 if (dev->rx_skb)
604                         goto try_again;
605         spin_lock_irq(&dev->rx_pool_lock);
606         skb = pull_skb(dev);
607         spin_unlock_irq(&dev->rx_pool_lock);
608         if (skb == NULL)
609                 goto tlsched;
610         dev->rx_skb = skb;
611         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
612                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
613 try_again:
614         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
615         if (status == -ENODEV) {
616                 netif_device_detach(dev->netdev);
617         } else if (status) {
618                 set_bit(RX_URB_FAIL, &dev->flags);
619                 goto tlsched;
620         } else {
621                 clear_bit(RX_URB_FAIL, &dev->flags);
622         }
623
624         return;
625 tlsched:
626         tasklet_schedule(&dev->tl);
627 }
628
629 static int enable_net_traffic(rtl8150_t * dev)
630 {
631         u8 cr, tcr, rcr, msr;
632
633         if (!rtl8150_reset(dev)) {
634                 dev_warn(&dev->udev->dev, "device reset failed\n");
635         }
636         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
637         rcr = 0x9e;
638         tcr = 0xd8;
639         cr = 0x0c;
640         if (!(rcr & 0x80))
641                 set_bit(RTL8150_HW_CRC, &dev->flags);
642         set_registers(dev, RCR, 1, &rcr);
643         set_registers(dev, TCR, 1, &tcr);
644         set_registers(dev, CR, 1, &cr);
645         get_registers(dev, MSR, 1, &msr);
646
647         return 0;
648 }
649
650 static void disable_net_traffic(rtl8150_t * dev)
651 {
652         u8 cr;
653
654         get_registers(dev, CR, 1, &cr);
655         cr &= 0xf3;
656         set_registers(dev, CR, 1, &cr);
657 }
658
659 static void rtl8150_tx_timeout(struct net_device *netdev)
660 {
661         rtl8150_t *dev = netdev_priv(netdev);
662         dev_warn(&netdev->dev, "Tx timeout.\n");
663         usb_unlink_urb(dev->tx_urb);
664         netdev->stats.tx_errors++;
665 }
666
667 static void rtl8150_set_multicast(struct net_device *netdev)
668 {
669         rtl8150_t *dev = netdev_priv(netdev);
670         u16 rx_creg = 0x9e;
671
672         netif_stop_queue(netdev);
673         if (netdev->flags & IFF_PROMISC) {
674                 rx_creg |= 0x0001;
675                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
676         } else if (!netdev_mc_empty(netdev) ||
677                    (netdev->flags & IFF_ALLMULTI)) {
678                 rx_creg &= 0xfffe;
679                 rx_creg |= 0x0002;
680                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
681         } else {
682                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
683                 rx_creg &= 0x00fc;
684         }
685         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
686         netif_wake_queue(netdev);
687 }
688
689 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
690                                             struct net_device *netdev)
691 {
692         rtl8150_t *dev = netdev_priv(netdev);
693         int count, res;
694
695         netif_stop_queue(netdev);
696         count = (skb->len < 60) ? 60 : skb->len;
697         count = (count & 0x3f) ? count : count + 1;
698         dev->tx_skb = skb;
699         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
700                       skb->data, count, write_bulk_callback, dev);
701         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
702                 /* Can we get/handle EPIPE here? */
703                 if (res == -ENODEV)
704                         netif_device_detach(dev->netdev);
705                 else {
706                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
707                         netdev->stats.tx_errors++;
708                         netif_start_queue(netdev);
709                 }
710         } else {
711                 netdev->stats.tx_packets++;
712                 netdev->stats.tx_bytes += skb->len;
713                 netif_trans_update(netdev);
714         }
715
716         return NETDEV_TX_OK;
717 }
718
719
720 static void set_carrier(struct net_device *netdev)
721 {
722         rtl8150_t *dev = netdev_priv(netdev);
723         short tmp;
724
725         get_registers(dev, CSCR, 2, &tmp);
726         if (tmp & CSCR_LINK_STATUS)
727                 netif_carrier_on(netdev);
728         else
729                 netif_carrier_off(netdev);
730 }
731
732 static int rtl8150_open(struct net_device *netdev)
733 {
734         rtl8150_t *dev = netdev_priv(netdev);
735         int res;
736
737         if (dev->rx_skb == NULL)
738                 dev->rx_skb = pull_skb(dev);
739         if (!dev->rx_skb)
740                 return -ENOMEM;
741
742         set_registers(dev, IDR, 6, netdev->dev_addr);
743
744         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
745                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
746         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
747                 if (res == -ENODEV)
748                         netif_device_detach(dev->netdev);
749                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
750                 return res;
751         }
752         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
753                      dev->intr_buff, INTBUFSIZE, intr_callback,
754                      dev, dev->intr_interval);
755         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
756                 if (res == -ENODEV)
757                         netif_device_detach(dev->netdev);
758                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
759                 usb_kill_urb(dev->rx_urb);
760                 return res;
761         }
762         enable_net_traffic(dev);
763         set_carrier(netdev);
764         netif_start_queue(netdev);
765
766         return res;
767 }
768
769 static int rtl8150_close(struct net_device *netdev)
770 {
771         rtl8150_t *dev = netdev_priv(netdev);
772
773         netif_stop_queue(netdev);
774         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
775                 disable_net_traffic(dev);
776         unlink_all_urbs(dev);
777
778         return 0;
779 }
780
781 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
782 {
783         rtl8150_t *dev = netdev_priv(netdev);
784
785         strlcpy(info->driver, driver_name, sizeof(info->driver));
786         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
787         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
788 }
789
790 static int rtl8150_get_link_ksettings(struct net_device *netdev,
791                                       struct ethtool_link_ksettings *ecmd)
792 {
793         rtl8150_t *dev = netdev_priv(netdev);
794         short lpa, bmcr;
795         u32 supported;
796
797         supported = (SUPPORTED_10baseT_Half |
798                           SUPPORTED_10baseT_Full |
799                           SUPPORTED_100baseT_Half |
800                           SUPPORTED_100baseT_Full |
801                           SUPPORTED_Autoneg |
802                           SUPPORTED_TP | SUPPORTED_MII);
803         ecmd->base.port = PORT_TP;
804         ecmd->base.phy_address = dev->phy;
805         get_registers(dev, BMCR, 2, &bmcr);
806         get_registers(dev, ANLP, 2, &lpa);
807         if (bmcr & BMCR_ANENABLE) {
808                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
809                              SPEED_100 : SPEED_10);
810                 ecmd->base.speed = speed;
811                 ecmd->base.autoneg = AUTONEG_ENABLE;
812                 if (speed == SPEED_100)
813                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
814                             DUPLEX_FULL : DUPLEX_HALF;
815                 else
816                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
817                             DUPLEX_FULL : DUPLEX_HALF;
818         } else {
819                 ecmd->base.autoneg = AUTONEG_DISABLE;
820                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
821                                              SPEED_100 : SPEED_10);
822                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
823                     DUPLEX_FULL : DUPLEX_HALF;
824         }
825
826         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
827                                                 supported);
828
829         return 0;
830 }
831
832 static const struct ethtool_ops ops = {
833         .get_drvinfo = rtl8150_get_drvinfo,
834         .get_link = ethtool_op_get_link,
835         .get_link_ksettings = rtl8150_get_link_ksettings,
836 };
837
838 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
839 {
840         rtl8150_t *dev = netdev_priv(netdev);
841         u16 *data = (u16 *) & rq->ifr_ifru;
842         int res = 0;
843
844         switch (cmd) {
845         case SIOCDEVPRIVATE:
846                 data[0] = dev->phy;
847                 /* fall through */
848         case SIOCDEVPRIVATE + 1:
849                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
850                 break;
851         case SIOCDEVPRIVATE + 2:
852                 if (!capable(CAP_NET_ADMIN))
853                         return -EPERM;
854                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
855                 break;
856         default:
857                 res = -EOPNOTSUPP;
858         }
859
860         return res;
861 }
862
863 static const struct net_device_ops rtl8150_netdev_ops = {
864         .ndo_open               = rtl8150_open,
865         .ndo_stop               = rtl8150_close,
866         .ndo_do_ioctl           = rtl8150_ioctl,
867         .ndo_start_xmit         = rtl8150_start_xmit,
868         .ndo_tx_timeout         = rtl8150_tx_timeout,
869         .ndo_set_rx_mode        = rtl8150_set_multicast,
870         .ndo_set_mac_address    = rtl8150_set_mac_address,
871
872         .ndo_validate_addr      = eth_validate_addr,
873 };
874
875 static int rtl8150_probe(struct usb_interface *intf,
876                          const struct usb_device_id *id)
877 {
878         struct usb_device *udev = interface_to_usbdev(intf);
879         rtl8150_t *dev;
880         struct net_device *netdev;
881
882         netdev = alloc_etherdev(sizeof(rtl8150_t));
883         if (!netdev)
884                 return -ENOMEM;
885
886         dev = netdev_priv(netdev);
887
888         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
889         if (!dev->intr_buff) {
890                 free_netdev(netdev);
891                 return -ENOMEM;
892         }
893
894         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
895         spin_lock_init(&dev->rx_pool_lock);
896
897         dev->udev = udev;
898         dev->netdev = netdev;
899         netdev->netdev_ops = &rtl8150_netdev_ops;
900         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
901         netdev->ethtool_ops = &ops;
902         dev->intr_interval = 100;       /* 100ms */
903
904         if (!alloc_all_urbs(dev)) {
905                 dev_err(&intf->dev, "out of memory\n");
906                 goto out;
907         }
908         if (!rtl8150_reset(dev)) {
909                 dev_err(&intf->dev, "couldn't reset the device\n");
910                 goto out1;
911         }
912         fill_skb_pool(dev);
913         set_ethernet_addr(dev);
914
915         usb_set_intfdata(intf, dev);
916         SET_NETDEV_DEV(netdev, &intf->dev);
917         if (register_netdev(netdev) != 0) {
918                 dev_err(&intf->dev, "couldn't register the device\n");
919                 goto out2;
920         }
921
922         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
923
924         return 0;
925
926 out2:
927         usb_set_intfdata(intf, NULL);
928         free_skb_pool(dev);
929 out1:
930         free_all_urbs(dev);
931 out:
932         kfree(dev->intr_buff);
933         free_netdev(netdev);
934         return -EIO;
935 }
936
937 static void rtl8150_disconnect(struct usb_interface *intf)
938 {
939         rtl8150_t *dev = usb_get_intfdata(intf);
940
941         usb_set_intfdata(intf, NULL);
942         if (dev) {
943                 set_bit(RTL8150_UNPLUG, &dev->flags);
944                 tasklet_kill(&dev->tl);
945                 unregister_netdev(dev->netdev);
946                 unlink_all_urbs(dev);
947                 free_all_urbs(dev);
948                 free_skb_pool(dev);
949                 if (dev->rx_skb)
950                         dev_kfree_skb(dev->rx_skb);
951                 kfree(dev->intr_buff);
952                 free_netdev(dev->netdev);
953         }
954 }
955
956 static struct usb_driver rtl8150_driver = {
957         .name           = driver_name,
958         .probe          = rtl8150_probe,
959         .disconnect     = rtl8150_disconnect,
960         .id_table       = rtl8150_table,
961         .suspend        = rtl8150_suspend,
962         .resume         = rtl8150_resume,
963         .disable_hub_initiated_lpm = 1,
964 };
965
966 module_usb_driver(rtl8150_driver);
967
968 MODULE_AUTHOR(DRIVER_AUTHOR);
969 MODULE_DESCRIPTION(DRIVER_DESC);
970 MODULE_LICENSE("GPL");