Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/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/signal.h>
 10 #include <linux/slab.h>
 11 #include <linux/module.h>
 12 #include <linux/netdevice.h>
 13 #include <linux/etherdevice.h>
 14 #include <linux/mii.h>
 15 #include <linux/ethtool.h>
 16 #include <linux/usb.h>
 17 #include <linux/uaccess.h>
 18 
 19 /* Version Information */
 20 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
 21 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
 22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
 23 
 24 #define IDR                     0x0120
 25 #define MAR                     0x0126
 26 #define CR                      0x012e
 27 #define TCR                     0x012f
 28 #define RCR                     0x0130
 29 #define TSR                     0x0132
 30 #define RSR                     0x0133
 31 #define CON0                    0x0135
 32 #define CON1                    0x0136
 33 #define MSR                     0x0137
 34 #define PHYADD                  0x0138
 35 #define PHYDAT                  0x0139
 36 #define PHYCNT                  0x013b
 37 #define GPPC                    0x013d
 38 #define BMCR                    0x0140
 39 #define BMSR                    0x0142
 40 #define ANAR                    0x0144
 41 #define ANLP                    0x0146
 42 #define AER                     0x0148
 43 #define CSCR                    0x014C  /* This one has the link status */
 44 #define CSCR_LINK_STATUS        (1 << 3)
 45 
 46 #define IDR_EEPROM              0x1202
 47 
 48 #define PHY_READ                0
 49 #define PHY_WRITE               0x20
 50 #define PHY_GO                  0x40
 51 
 52 #define MII_TIMEOUT             10
 53 #define INTBUFSIZE              8
 54 
 55 #define RTL8150_REQT_READ       0xc0
 56 #define RTL8150_REQT_WRITE      0x40
 57 #define RTL8150_REQ_GET_REGS    0x05
 58 #define RTL8150_REQ_SET_REGS    0x05
 59 
 60 
 61 /* Transmit status register errors */
 62 #define TSR_ECOL                (1<<5)
 63 #define TSR_LCOL                (1<<4)
 64 #define TSR_LOSS_CRS            (1<<3)
 65 #define TSR_JBR                 (1<<2)
 66 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
 67 /* Receive status register errors */
 68 #define RSR_CRC                 (1<<2)
 69 #define RSR_FAE                 (1<<1)
 70 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
 71 
 72 /* Media status register definitions */
 73 #define MSR_DUPLEX              (1<<4)
 74 #define MSR_SPEED               (1<<3)
 75 #define MSR_LINK                (1<<2)
 76 
 77 /* Interrupt pipe data */
 78 #define INT_TSR                 0x00
 79 #define INT_RSR                 0x01
 80 #define INT_MSR                 0x02
 81 #define INT_WAKSR               0x03
 82 #define INT_TXOK_CNT            0x04
 83 #define INT_RXLOST_CNT          0x05
 84 #define INT_CRERR_CNT           0x06
 85 #define INT_COL_CNT             0x07
 86 
 87 
 88 #define RTL8150_MTU             1540
 89 #define RTL8150_TX_TIMEOUT      (HZ)
 90 #define RX_SKB_POOL_SIZE        4
 91 
 92 /* rtl8150 flags */
 93 #define RTL8150_HW_CRC          0
 94 #define RX_REG_SET              1
 95 #define RTL8150_UNPLUG          2
 96 #define RX_URB_FAIL             3
 97 
 98 /* Define these values to match your device */
 99 #define VENDOR_ID_REALTEK               0x0bda
100 #define VENDOR_ID_MELCO                 0x0411
101 #define VENDOR_ID_MICRONET              0x3980
102 #define VENDOR_ID_LONGSHINE             0x07b8
103 #define VENDOR_ID_OQO                   0x1557
104 #define VENDOR_ID_ZYXEL                 0x0586
105 
106 #define PRODUCT_ID_RTL8150              0x8150
107 #define PRODUCT_ID_LUAKTX               0x0012
108 #define PRODUCT_ID_LCS8138TX            0x401a
109 #define PRODUCT_ID_SP128AR              0x0003
110 #define PRODUCT_ID_PRESTIGE             0x401a
111 
112 #undef  EEPROM_WRITE
113 
114 /* table of devices that work with this driver */
115 static struct usb_device_id rtl8150_table[] = {
116         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
117         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
118         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
119         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
120         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
121         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
122         {}
123 };
124 
125 MODULE_DEVICE_TABLE(usb, rtl8150_table);
126 
127 struct rtl8150 {
128         unsigned long flags;
129         struct usb_device *udev;
130         struct tasklet_struct tl;
131         struct net_device *netdev;
132         struct urb *rx_urb, *tx_urb, *intr_urb;
133         struct sk_buff *tx_skb, *rx_skb;
134         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
135         spinlock_t rx_pool_lock;
136         struct usb_ctrlrequest dr;
137         int intr_interval;
138         u8 *intr_buff;
139         u8 phy;
140 };
141 
142 typedef struct rtl8150 rtl8150_t;
143 
144 struct async_req {
145         struct usb_ctrlrequest dr;
146         u16 rx_creg;
147 };
148 
149 static const char driver_name [] = "rtl8150";
150 
151 /*
152 **
153 **      device related part of the code
154 **
155 */
156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
157 {
158         void *buf;
159         int ret;
160 
161         buf = kmalloc(size, GFP_NOIO);
162         if (!buf)
163                 return -ENOMEM;
164 
165         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
166                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
167                               indx, 0, buf, size, 500);
168         if (ret > 0 && ret <= size)
169                 memcpy(data, buf, ret);
170         kfree(buf);
171         return ret;
172 }
173 
174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
175 {
176         void *buf;
177         int ret;
178 
179         buf = kmemdup(data, size, GFP_NOIO);
180         if (!buf)
181                 return -ENOMEM;
182 
183         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
184                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
185                               indx, 0, buf, size, 500);
186         kfree(buf);
187         return ret;
188 }
189 
190 static void async_set_reg_cb(struct urb *urb)
191 {
192         struct async_req *req = (struct async_req *)urb->context;
193         int status = urb->status;
194 
195         if (status < 0)
196                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
197         kfree(req);
198         usb_free_urb(urb);
199 }
200 
201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
202 {
203         int res = -ENOMEM;
204         struct urb *async_urb;
205         struct async_req *req;
206 
207         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
208         if (req == NULL)
209                 return res;
210         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
211         if (async_urb == NULL) {
212                 kfree(req);
213                 return res;
214         }
215         req->rx_creg = cpu_to_le16(reg);
216         req->dr.bRequestType = RTL8150_REQT_WRITE;
217         req->dr.bRequest = RTL8150_REQ_SET_REGS;
218         req->dr.wIndex = 0;
219         req->dr.wValue = cpu_to_le16(indx);
220         req->dr.wLength = cpu_to_le16(size);
221         usb_fill_control_urb(async_urb, dev->udev,
222                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
223                              &req->rx_creg, size, async_set_reg_cb, req);
224         res = usb_submit_urb(async_urb, GFP_ATOMIC);
225         if (res) {
226                 if (res == -ENODEV)
227                         netif_device_detach(dev->netdev);
228                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
229         }
230         return res;
231 }
232 
233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
234 {
235         int i;
236         u8 data[3], tmp;
237 
238         data[0] = phy;
239         data[1] = data[2] = 0;
240         tmp = indx | PHY_READ | PHY_GO;
241         i = 0;
242 
243         set_registers(dev, PHYADD, sizeof(data), data);
244         set_registers(dev, PHYCNT, 1, &tmp);
245         do {
246                 get_registers(dev, PHYCNT, 1, data);
247         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
248 
249         if (i <= MII_TIMEOUT) {
250                 get_registers(dev, PHYDAT, 2, data);
251                 *reg = data[0] | (data[1] << 8);
252                 return 0;
253         } else
254                 return 1;
255 }
256 
257 static int write_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] = reg & 0xff;
264         data[2] = (reg >> 8) & 0xff;
265         tmp = indx | PHY_WRITE | PHY_GO;
266         i = 0;
267 
268         set_registers(dev, PHYADD, sizeof(data), data);
269         set_registers(dev, PHYCNT, 1, &tmp);
270         do {
271                 get_registers(dev, PHYCNT, 1, data);
272         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
273 
274         if (i <= MII_TIMEOUT)
275                 return 0;
276         else
277                 return 1;
278 }
279 
280 static inline void set_ethernet_addr(rtl8150_t * dev)
281 {
282         u8 node_id[6];
283 
284         get_registers(dev, IDR, sizeof(node_id), node_id);
285         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
286 }
287 
288 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
289 {
290         struct sockaddr *addr = p;
291         rtl8150_t *dev = netdev_priv(netdev);
292 
293         if (netif_running(netdev))
294                 return -EBUSY;
295 
296         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
297         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
298         /* Set the IDR registers. */
299         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
300 #ifdef EEPROM_WRITE
301         {
302         int i;
303         u8 cr;
304         /* Get the CR contents. */
305         get_registers(dev, CR, 1, &cr);
306         /* Set the WEPROM bit (eeprom write enable). */
307         cr |= 0x20;
308         set_registers(dev, CR, 1, &cr);
309         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
310            so we need to split them up. */
311         for (i = 0; i * 2 < netdev->addr_len; i++) {
312                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
313                 netdev->dev_addr + (i * 2));
314         }
315         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
316         cr &= 0xdf;
317         set_registers(dev, CR, 1, &cr);
318         }
319 #endif
320         return 0;
321 }
322 
323 static int rtl8150_reset(rtl8150_t * dev)
324 {
325         u8 data = 0x10;
326         int i = HZ;
327 
328         set_registers(dev, CR, 1, &data);
329         do {
330                 get_registers(dev, CR, 1, &data);
331         } while ((data & 0x10) && --i);
332 
333         return (i > 0) ? 1 : 0;
334 }
335 
336 static int alloc_all_urbs(rtl8150_t * dev)
337 {
338         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
339         if (!dev->rx_urb)
340                 return 0;
341         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
342         if (!dev->tx_urb) {
343                 usb_free_urb(dev->rx_urb);
344                 return 0;
345         }
346         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
347         if (!dev->intr_urb) {
348                 usb_free_urb(dev->rx_urb);
349                 usb_free_urb(dev->tx_urb);
350                 return 0;
351         }
352 
353         return 1;
354 }
355 
356 static void free_all_urbs(rtl8150_t * dev)
357 {
358         usb_free_urb(dev->rx_urb);
359         usb_free_urb(dev->tx_urb);
360         usb_free_urb(dev->intr_urb);
361 }
362 
363 static void unlink_all_urbs(rtl8150_t * dev)
364 {
365         usb_kill_urb(dev->rx_urb);
366         usb_kill_urb(dev->tx_urb);
367         usb_kill_urb(dev->intr_urb);
368 }
369 
370 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
371 {
372         struct sk_buff *skb;
373         int i;
374 
375         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
376                 if (dev->rx_skb_pool[i]) {
377                         skb = dev->rx_skb_pool[i];
378                         dev->rx_skb_pool[i] = NULL;
379                         return skb;
380                 }
381         }
382         return NULL;
383 }
384 
385 static void read_bulk_callback(struct urb *urb)
386 {
387         rtl8150_t *dev;
388         unsigned pkt_len, res;
389         struct sk_buff *skb;
390         struct net_device *netdev;
391         u16 rx_stat;
392         int status = urb->status;
393         int result;
394 
395         dev = urb->context;
396         if (!dev)
397                 return;
398         if (test_bit(RTL8150_UNPLUG, &dev->flags))
399                 return;
400         netdev = dev->netdev;
401         if (!netif_device_present(netdev))
402                 return;
403 
404         switch (status) {
405         case 0:
406                 break;
407         case -ENOENT:
408                 return; /* the urb is in unlink state */
409         case -ETIME:
410                 if (printk_ratelimit())
411                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
412                 goto goon;
413         default:
414                 if (printk_ratelimit())
415                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
416                 goto goon;
417         }
418 
419         if (!dev->rx_skb)
420                 goto resched;
421         /* protect against short packets (tell me why we got some?!?) */
422         if (urb->actual_length < 4)
423                 goto goon;
424 
425         res = urb->actual_length;
426         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
427         pkt_len = res - 4;
428 
429         skb_put(dev->rx_skb, pkt_len);
430         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
431         netif_rx(dev->rx_skb);
432         netdev->stats.rx_packets++;
433         netdev->stats.rx_bytes += pkt_len;
434 
435         spin_lock(&dev->rx_pool_lock);
436         skb = pull_skb(dev);
437         spin_unlock(&dev->rx_pool_lock);
438         if (!skb)
439                 goto resched;
440 
441         dev->rx_skb = skb;
442 goon:
443         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
444                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
445         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
446         if (result == -ENODEV)
447                 netif_device_detach(dev->netdev);
448         else if (result) {
449                 set_bit(RX_URB_FAIL, &dev->flags);
450                 goto resched;
451         } else {
452                 clear_bit(RX_URB_FAIL, &dev->flags);
453         }
454 
455         return;
456 resched:
457         tasklet_schedule(&dev->tl);
458 }
459 
460 static void write_bulk_callback(struct urb *urb)
461 {
462         rtl8150_t *dev;
463         int status = urb->status;
464 
465         dev = urb->context;
466         if (!dev)
467                 return;
468         dev_kfree_skb_irq(dev->tx_skb);
469         if (!netif_device_present(dev->netdev))
470                 return;
471         if (status)
472                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
473                          dev->netdev->name, status);
474         netif_trans_update(dev->netdev);
475         netif_wake_queue(dev->netdev);
476 }
477 
478 static void intr_callback(struct urb *urb)
479 {
480         rtl8150_t *dev;
481         __u8 *d;
482         int status = urb->status;
483         int res;
484 
485         dev = urb->context;
486         if (!dev)
487                 return;
488         switch (status) {
489         case 0:                 /* success */
490                 break;
491         case -ECONNRESET:       /* unlink */
492         case -ENOENT:
493         case -ESHUTDOWN:
494                 return;
495         /* -EPIPE:  should clear the halt */
496         default:
497                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
498                          dev->netdev->name, status);
499                 goto resubmit;
500         }
501 
502         d = urb->transfer_buffer;
503         if (d[0] & TSR_ERRORS) {
504                 dev->netdev->stats.tx_errors++;
505                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
506                         dev->netdev->stats.tx_aborted_errors++;
507                 if (d[INT_TSR] & TSR_LCOL)
508                         dev->netdev->stats.tx_window_errors++;
509                 if (d[INT_TSR] & TSR_LOSS_CRS)
510                         dev->netdev->stats.tx_carrier_errors++;
511         }
512         /* Report link status changes to the network stack */
513         if ((d[INT_MSR] & MSR_LINK) == 0) {
514                 if (netif_carrier_ok(dev->netdev)) {
515                         netif_carrier_off(dev->netdev);
516                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
517                 }
518         } else {
519                 if (!netif_carrier_ok(dev->netdev)) {
520                         netif_carrier_on(dev->netdev);
521                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
522                 }
523         }
524 
525 resubmit:
526         res = usb_submit_urb (urb, GFP_ATOMIC);
527         if (res == -ENODEV)
528                 netif_device_detach(dev->netdev);
529         else if (res)
530                 dev_err(&dev->udev->dev,
531                         "can't resubmit intr, %s-%s/input0, status %d\n",
532                         dev->udev->bus->bus_name, dev->udev->devpath, res);
533 }
534 
535 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
536 {
537         rtl8150_t *dev = usb_get_intfdata(intf);
538 
539         netif_device_detach(dev->netdev);
540 
541         if (netif_running(dev->netdev)) {
542                 usb_kill_urb(dev->rx_urb);
543                 usb_kill_urb(dev->intr_urb);
544         }
545         return 0;
546 }
547 
548 static int rtl8150_resume(struct usb_interface *intf)
549 {
550         rtl8150_t *dev = usb_get_intfdata(intf);
551 
552         netif_device_attach(dev->netdev);
553         if (netif_running(dev->netdev)) {
554                 dev->rx_urb->status = 0;
555                 dev->rx_urb->actual_length = 0;
556                 read_bulk_callback(dev->rx_urb);
557 
558                 dev->intr_urb->status = 0;
559                 dev->intr_urb->actual_length = 0;
560                 intr_callback(dev->intr_urb);
561         }
562         return 0;
563 }
564 
565 /*
566 **
567 **      network related part of the code
568 **
569 */
570 
571 static void fill_skb_pool(rtl8150_t *dev)
572 {
573         struct sk_buff *skb;
574         int i;
575 
576         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
577                 if (dev->rx_skb_pool[i])
578                         continue;
579                 skb = dev_alloc_skb(RTL8150_MTU + 2);
580                 if (!skb) {
581                         return;
582                 }
583                 skb_reserve(skb, 2);
584                 dev->rx_skb_pool[i] = skb;
585         }
586 }
587 
588 static void free_skb_pool(rtl8150_t *dev)
589 {
590         int i;
591 
592         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
593                 if (dev->rx_skb_pool[i])
594                         dev_kfree_skb(dev->rx_skb_pool[i]);
595 }
596 
597 static void rx_fixup(unsigned long data)
598 {
599         struct rtl8150 *dev = (struct rtl8150 *)data;
600         struct sk_buff *skb;
601         int status;
602 
603         spin_lock_irq(&dev->rx_pool_lock);
604         fill_skb_pool(dev);
605         spin_unlock_irq(&dev->rx_pool_lock);
606         if (test_bit(RX_URB_FAIL, &dev->flags))
607                 if (dev->rx_skb)
608                         goto try_again;
609         spin_lock_irq(&dev->rx_pool_lock);
610         skb = pull_skb(dev);
611         spin_unlock_irq(&dev->rx_pool_lock);
612         if (skb == NULL)
613                 goto tlsched;
614         dev->rx_skb = skb;
615         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
616                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
617 try_again:
618         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
619         if (status == -ENODEV) {
620                 netif_device_detach(dev->netdev);
621         } else if (status) {
622                 set_bit(RX_URB_FAIL, &dev->flags);
623                 goto tlsched;
624         } else {
625                 clear_bit(RX_URB_FAIL, &dev->flags);
626         }
627 
628         return;
629 tlsched:
630         tasklet_schedule(&dev->tl);
631 }
632 
633 static int enable_net_traffic(rtl8150_t * dev)
634 {
635         u8 cr, tcr, rcr, msr;
636 
637         if (!rtl8150_reset(dev)) {
638                 dev_warn(&dev->udev->dev, "device reset failed\n");
639         }
640         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
641         rcr = 0x9e;
642         tcr = 0xd8;
643         cr = 0x0c;
644         if (!(rcr & 0x80))
645                 set_bit(RTL8150_HW_CRC, &dev->flags);
646         set_registers(dev, RCR, 1, &rcr);
647         set_registers(dev, TCR, 1, &tcr);
648         set_registers(dev, CR, 1, &cr);
649         get_registers(dev, MSR, 1, &msr);
650 
651         return 0;
652 }
653 
654 static void disable_net_traffic(rtl8150_t * dev)
655 {
656         u8 cr;
657 
658         get_registers(dev, CR, 1, &cr);
659         cr &= 0xf3;
660         set_registers(dev, CR, 1, &cr);
661 }
662 
663 static void rtl8150_tx_timeout(struct net_device *netdev)
664 {
665         rtl8150_t *dev = netdev_priv(netdev);
666         dev_warn(&netdev->dev, "Tx timeout.\n");
667         usb_unlink_urb(dev->tx_urb);
668         netdev->stats.tx_errors++;
669 }
670 
671 static void rtl8150_set_multicast(struct net_device *netdev)
672 {
673         rtl8150_t *dev = netdev_priv(netdev);
674         u16 rx_creg = 0x9e;
675 
676         netif_stop_queue(netdev);
677         if (netdev->flags & IFF_PROMISC) {
678                 rx_creg |= 0x0001;
679                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
680         } else if (!netdev_mc_empty(netdev) ||
681                    (netdev->flags & IFF_ALLMULTI)) {
682                 rx_creg &= 0xfffe;
683                 rx_creg |= 0x0002;
684                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
685         } else {
686                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
687                 rx_creg &= 0x00fc;
688         }
689         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
690         netif_wake_queue(netdev);
691 }
692 
693 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
694                                             struct net_device *netdev)
695 {
696         rtl8150_t *dev = netdev_priv(netdev);
697         int count, res;
698 
699         netif_stop_queue(netdev);
700         count = (skb->len < 60) ? 60 : skb->len;
701         count = (count & 0x3f) ? count : count + 1;
702         dev->tx_skb = skb;
703         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
704                       skb->data, count, write_bulk_callback, dev);
705         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
706                 /* Can we get/handle EPIPE here? */
707                 if (res == -ENODEV)
708                         netif_device_detach(dev->netdev);
709                 else {
710                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
711                         netdev->stats.tx_errors++;
712                         netif_start_queue(netdev);
713                 }
714         } else {
715                 netdev->stats.tx_packets++;
716                 netdev->stats.tx_bytes += skb->len;
717                 netif_trans_update(netdev);
718         }
719 
720         return NETDEV_TX_OK;
721 }
722 
723 
724 static void set_carrier(struct net_device *netdev)
725 {
726         rtl8150_t *dev = netdev_priv(netdev);
727         short tmp;
728 
729         get_registers(dev, CSCR, 2, &tmp);
730         if (tmp & CSCR_LINK_STATUS)
731                 netif_carrier_on(netdev);
732         else
733                 netif_carrier_off(netdev);
734 }
735 
736 static int rtl8150_open(struct net_device *netdev)
737 {
738         rtl8150_t *dev = netdev_priv(netdev);
739         int res;
740 
741         if (dev->rx_skb == NULL)
742                 dev->rx_skb = pull_skb(dev);
743         if (!dev->rx_skb)
744                 return -ENOMEM;
745 
746         set_registers(dev, IDR, 6, netdev->dev_addr);
747 
748         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
749                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
750         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
751                 if (res == -ENODEV)
752                         netif_device_detach(dev->netdev);
753                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
754                 return res;
755         }
756         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
757                      dev->intr_buff, INTBUFSIZE, intr_callback,
758                      dev, dev->intr_interval);
759         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
760                 if (res == -ENODEV)
761                         netif_device_detach(dev->netdev);
762                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
763                 usb_kill_urb(dev->rx_urb);
764                 return res;
765         }
766         enable_net_traffic(dev);
767         set_carrier(netdev);
768         netif_start_queue(netdev);
769 
770         return res;
771 }
772 
773 static int rtl8150_close(struct net_device *netdev)
774 {
775         rtl8150_t *dev = netdev_priv(netdev);
776 
777         netif_stop_queue(netdev);
778         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
779                 disable_net_traffic(dev);
780         unlink_all_urbs(dev);
781 
782         return 0;
783 }
784 
785 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
786 {
787         rtl8150_t *dev = netdev_priv(netdev);
788 
789         strlcpy(info->driver, driver_name, sizeof(info->driver));
790         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
791         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
792 }
793 
794 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
795 {
796         rtl8150_t *dev = netdev_priv(netdev);
797         short lpa, bmcr;
798 
799         ecmd->supported = (SUPPORTED_10baseT_Half |
800                           SUPPORTED_10baseT_Full |
801                           SUPPORTED_100baseT_Half |
802                           SUPPORTED_100baseT_Full |
803                           SUPPORTED_Autoneg |
804                           SUPPORTED_TP | SUPPORTED_MII);
805         ecmd->port = PORT_TP;
806         ecmd->transceiver = XCVR_INTERNAL;
807         ecmd->phy_address = dev->phy;
808         get_registers(dev, BMCR, 2, &bmcr);
809         get_registers(dev, ANLP, 2, &lpa);
810         if (bmcr & BMCR_ANENABLE) {
811                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
812                              SPEED_100 : SPEED_10);
813                 ethtool_cmd_speed_set(ecmd, speed);
814                 ecmd->autoneg = AUTONEG_ENABLE;
815                 if (speed == SPEED_100)
816                         ecmd->duplex = (lpa & LPA_100FULL) ?
817                             DUPLEX_FULL : DUPLEX_HALF;
818                 else
819                         ecmd->duplex = (lpa & LPA_10FULL) ?
820                             DUPLEX_FULL : DUPLEX_HALF;
821         } else {
822                 ecmd->autoneg = AUTONEG_DISABLE;
823                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
824                                              SPEED_100 : SPEED_10));
825                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
826                     DUPLEX_FULL : DUPLEX_HALF;
827         }
828         return 0;
829 }
830 
831 static const struct ethtool_ops ops = {
832         .get_drvinfo = rtl8150_get_drvinfo,
833         .get_settings = rtl8150_get_settings,
834         .get_link = ethtool_op_get_link
835 };
836 
837 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
838 {
839         rtl8150_t *dev = netdev_priv(netdev);
840         u16 *data = (u16 *) & rq->ifr_ifru;
841         int res = 0;
842 
843         switch (cmd) {
844         case SIOCDEVPRIVATE:
845                 data[0] = dev->phy;
846         case SIOCDEVPRIVATE + 1:
847                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
848                 break;
849         case SIOCDEVPRIVATE + 2:
850                 if (!capable(CAP_NET_ADMIN))
851                         return -EPERM;
852                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
853                 break;
854         default:
855                 res = -EOPNOTSUPP;
856         }
857 
858         return res;
859 }
860 
861 static const struct net_device_ops rtl8150_netdev_ops = {
862         .ndo_open               = rtl8150_open,
863         .ndo_stop               = rtl8150_close,
864         .ndo_do_ioctl           = rtl8150_ioctl,
865         .ndo_start_xmit         = rtl8150_start_xmit,
866         .ndo_tx_timeout         = rtl8150_tx_timeout,
867         .ndo_set_rx_mode        = rtl8150_set_multicast,
868         .ndo_set_mac_address    = rtl8150_set_mac_address,
869 
870         .ndo_validate_addr      = eth_validate_addr,
871 };
872 
873 static int rtl8150_probe(struct usb_interface *intf,
874                          const struct usb_device_id *id)
875 {
876         struct usb_device *udev = interface_to_usbdev(intf);
877         rtl8150_t *dev;
878         struct net_device *netdev;
879 
880         netdev = alloc_etherdev(sizeof(rtl8150_t));
881         if (!netdev)
882                 return -ENOMEM;
883 
884         dev = netdev_priv(netdev);
885 
886         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
887         if (!dev->intr_buff) {
888                 free_netdev(netdev);
889                 return -ENOMEM;
890         }
891 
892         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
893         spin_lock_init(&dev->rx_pool_lock);
894 
895         dev->udev = udev;
896         dev->netdev = netdev;
897         netdev->netdev_ops = &rtl8150_netdev_ops;
898         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
899         netdev->ethtool_ops = &ops;
900         dev->intr_interval = 100;       /* 100ms */
901 
902         if (!alloc_all_urbs(dev)) {
903                 dev_err(&intf->dev, "out of memory\n");
904                 goto out;
905         }
906         if (!rtl8150_reset(dev)) {
907                 dev_err(&intf->dev, "couldn't reset the device\n");
908                 goto out1;
909         }
910         fill_skb_pool(dev);
911         set_ethernet_addr(dev);
912 
913         usb_set_intfdata(intf, dev);
914         SET_NETDEV_DEV(netdev, &intf->dev);
915         if (register_netdev(netdev) != 0) {
916                 dev_err(&intf->dev, "couldn't register the device\n");
917                 goto out2;
918         }
919 
920         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
921 
922         return 0;
923 
924 out2:
925         usb_set_intfdata(intf, NULL);
926         free_skb_pool(dev);
927 out1:
928         free_all_urbs(dev);
929 out:
930         kfree(dev->intr_buff);
931         free_netdev(netdev);
932         return -EIO;
933 }
934 
935 static void rtl8150_disconnect(struct usb_interface *intf)
936 {
937         rtl8150_t *dev = usb_get_intfdata(intf);
938 
939         usb_set_intfdata(intf, NULL);
940         if (dev) {
941                 set_bit(RTL8150_UNPLUG, &dev->flags);
942                 tasklet_kill(&dev->tl);
943                 unregister_netdev(dev->netdev);
944                 unlink_all_urbs(dev);
945                 free_all_urbs(dev);
946                 free_skb_pool(dev);
947                 if (dev->rx_skb)
948                         dev_kfree_skb(dev->rx_skb);
949                 kfree(dev->intr_buff);
950                 free_netdev(dev->netdev);
951         }
952 }
953 
954 static struct usb_driver rtl8150_driver = {
955         .name           = driver_name,
956         .probe          = rtl8150_probe,
957         .disconnect     = rtl8150_disconnect,
958         .id_table       = rtl8150_table,
959         .suspend        = rtl8150_suspend,
960         .resume         = rtl8150_resume,
961         .disable_hub_initiated_lpm = 1,
962 };
963 
964 module_usb_driver(rtl8150_driver);
965 
966 MODULE_AUTHOR(DRIVER_AUTHOR);
967 MODULE_DESCRIPTION(DRIVER_DESC);
968 MODULE_LICENSE("GPL");
969 

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