Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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 <asm/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         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
159                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
160                                indx, 0, data, size, 500);
161 }
162 
163 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
164 {
165         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
166                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
167                                indx, 0, data, size, 500);
168 }
169 
170 static void async_set_reg_cb(struct urb *urb)
171 {
172         struct async_req *req = (struct async_req *)urb->context;
173         int status = urb->status;
174 
175         if (status < 0)
176                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
177         kfree(req);
178         usb_free_urb(urb);
179 }
180 
181 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
182 {
183         int res = -ENOMEM;
184         struct urb *async_urb;
185         struct async_req *req;
186 
187         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
188         if (req == NULL)
189                 return res;
190         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
191         if (async_urb == NULL) {
192                 kfree(req);
193                 return res;
194         }
195         req->rx_creg = cpu_to_le16(reg);
196         req->dr.bRequestType = RTL8150_REQT_WRITE;
197         req->dr.bRequest = RTL8150_REQ_SET_REGS;
198         req->dr.wIndex = 0;
199         req->dr.wValue = cpu_to_le16(indx);
200         req->dr.wLength = cpu_to_le16(size);
201         usb_fill_control_urb(async_urb, dev->udev,
202                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
203                              &req->rx_creg, size, async_set_reg_cb, req);
204         res = usb_submit_urb(async_urb, GFP_ATOMIC);
205         if (res) {
206                 if (res == -ENODEV)
207                         netif_device_detach(dev->netdev);
208                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
209         }
210         return res;
211 }
212 
213 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
214 {
215         int i;
216         u8 data[3], tmp;
217 
218         data[0] = phy;
219         data[1] = data[2] = 0;
220         tmp = indx | PHY_READ | PHY_GO;
221         i = 0;
222 
223         set_registers(dev, PHYADD, sizeof(data), data);
224         set_registers(dev, PHYCNT, 1, &tmp);
225         do {
226                 get_registers(dev, PHYCNT, 1, data);
227         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
228 
229         if (i <= MII_TIMEOUT) {
230                 get_registers(dev, PHYDAT, 2, data);
231                 *reg = data[0] | (data[1] << 8);
232                 return 0;
233         } else
234                 return 1;
235 }
236 
237 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
238 {
239         int i;
240         u8 data[3], tmp;
241 
242         data[0] = phy;
243         data[1] = reg & 0xff;
244         data[2] = (reg >> 8) & 0xff;
245         tmp = indx | PHY_WRITE | PHY_GO;
246         i = 0;
247 
248         set_registers(dev, PHYADD, sizeof(data), data);
249         set_registers(dev, PHYCNT, 1, &tmp);
250         do {
251                 get_registers(dev, PHYCNT, 1, data);
252         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
253 
254         if (i <= MII_TIMEOUT)
255                 return 0;
256         else
257                 return 1;
258 }
259 
260 static inline void set_ethernet_addr(rtl8150_t * dev)
261 {
262         u8 node_id[6];
263 
264         get_registers(dev, IDR, sizeof(node_id), node_id);
265         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
266 }
267 
268 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
269 {
270         struct sockaddr *addr = p;
271         rtl8150_t *dev = netdev_priv(netdev);
272 
273         if (netif_running(netdev))
274                 return -EBUSY;
275 
276         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
277         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
278         /* Set the IDR registers. */
279         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
280 #ifdef EEPROM_WRITE
281         {
282         int i;
283         u8 cr;
284         /* Get the CR contents. */
285         get_registers(dev, CR, 1, &cr);
286         /* Set the WEPROM bit (eeprom write enable). */
287         cr |= 0x20;
288         set_registers(dev, CR, 1, &cr);
289         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
290            so we need to split them up. */
291         for (i = 0; i * 2 < netdev->addr_len; i++) {
292                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
293                 netdev->dev_addr + (i * 2));
294         }
295         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
296         cr &= 0xdf;
297         set_registers(dev, CR, 1, &cr);
298         }
299 #endif
300         return 0;
301 }
302 
303 static int rtl8150_reset(rtl8150_t * dev)
304 {
305         u8 data = 0x10;
306         int i = HZ;
307 
308         set_registers(dev, CR, 1, &data);
309         do {
310                 get_registers(dev, CR, 1, &data);
311         } while ((data & 0x10) && --i);
312 
313         return (i > 0) ? 1 : 0;
314 }
315 
316 static int alloc_all_urbs(rtl8150_t * dev)
317 {
318         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
319         if (!dev->rx_urb)
320                 return 0;
321         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
322         if (!dev->tx_urb) {
323                 usb_free_urb(dev->rx_urb);
324                 return 0;
325         }
326         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
327         if (!dev->intr_urb) {
328                 usb_free_urb(dev->rx_urb);
329                 usb_free_urb(dev->tx_urb);
330                 return 0;
331         }
332 
333         return 1;
334 }
335 
336 static void free_all_urbs(rtl8150_t * dev)
337 {
338         usb_free_urb(dev->rx_urb);
339         usb_free_urb(dev->tx_urb);
340         usb_free_urb(dev->intr_urb);
341 }
342 
343 static void unlink_all_urbs(rtl8150_t * dev)
344 {
345         usb_kill_urb(dev->rx_urb);
346         usb_kill_urb(dev->tx_urb);
347         usb_kill_urb(dev->intr_urb);
348 }
349 
350 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
351 {
352         struct sk_buff *skb;
353         int i;
354 
355         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
356                 if (dev->rx_skb_pool[i]) {
357                         skb = dev->rx_skb_pool[i];
358                         dev->rx_skb_pool[i] = NULL;
359                         return skb;
360                 }
361         }
362         return NULL;
363 }
364 
365 static void read_bulk_callback(struct urb *urb)
366 {
367         rtl8150_t *dev;
368         unsigned pkt_len, res;
369         struct sk_buff *skb;
370         struct net_device *netdev;
371         u16 rx_stat;
372         int status = urb->status;
373         int result;
374 
375         dev = urb->context;
376         if (!dev)
377                 return;
378         if (test_bit(RTL8150_UNPLUG, &dev->flags))
379                 return;
380         netdev = dev->netdev;
381         if (!netif_device_present(netdev))
382                 return;
383 
384         switch (status) {
385         case 0:
386                 break;
387         case -ENOENT:
388                 return; /* the urb is in unlink state */
389         case -ETIME:
390                 if (printk_ratelimit())
391                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
392                 goto goon;
393         default:
394                 if (printk_ratelimit())
395                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
396                 goto goon;
397         }
398 
399         if (!dev->rx_skb)
400                 goto resched;
401         /* protect against short packets (tell me why we got some?!?) */
402         if (urb->actual_length < 4)
403                 goto goon;
404 
405         res = urb->actual_length;
406         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
407         pkt_len = res - 4;
408 
409         skb_put(dev->rx_skb, pkt_len);
410         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
411         netif_rx(dev->rx_skb);
412         netdev->stats.rx_packets++;
413         netdev->stats.rx_bytes += pkt_len;
414 
415         spin_lock(&dev->rx_pool_lock);
416         skb = pull_skb(dev);
417         spin_unlock(&dev->rx_pool_lock);
418         if (!skb)
419                 goto resched;
420 
421         dev->rx_skb = skb;
422 goon:
423         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
424                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
425         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
426         if (result == -ENODEV)
427                 netif_device_detach(dev->netdev);
428         else if (result) {
429                 set_bit(RX_URB_FAIL, &dev->flags);
430                 goto resched;
431         } else {
432                 clear_bit(RX_URB_FAIL, &dev->flags);
433         }
434 
435         return;
436 resched:
437         tasklet_schedule(&dev->tl);
438 }
439 
440 static void write_bulk_callback(struct urb *urb)
441 {
442         rtl8150_t *dev;
443         int status = urb->status;
444 
445         dev = urb->context;
446         if (!dev)
447                 return;
448         dev_kfree_skb_irq(dev->tx_skb);
449         if (!netif_device_present(dev->netdev))
450                 return;
451         if (status)
452                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
453                          dev->netdev->name, status);
454         dev->netdev->trans_start = jiffies;
455         netif_wake_queue(dev->netdev);
456 }
457 
458 static void intr_callback(struct urb *urb)
459 {
460         rtl8150_t *dev;
461         __u8 *d;
462         int status = urb->status;
463         int res;
464 
465         dev = urb->context;
466         if (!dev)
467                 return;
468         switch (status) {
469         case 0:                 /* success */
470                 break;
471         case -ECONNRESET:       /* unlink */
472         case -ENOENT:
473         case -ESHUTDOWN:
474                 return;
475         /* -EPIPE:  should clear the halt */
476         default:
477                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
478                          dev->netdev->name, status);
479                 goto resubmit;
480         }
481 
482         d = urb->transfer_buffer;
483         if (d[0] & TSR_ERRORS) {
484                 dev->netdev->stats.tx_errors++;
485                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
486                         dev->netdev->stats.tx_aborted_errors++;
487                 if (d[INT_TSR] & TSR_LCOL)
488                         dev->netdev->stats.tx_window_errors++;
489                 if (d[INT_TSR] & TSR_LOSS_CRS)
490                         dev->netdev->stats.tx_carrier_errors++;
491         }
492         /* Report link status changes to the network stack */
493         if ((d[INT_MSR] & MSR_LINK) == 0) {
494                 if (netif_carrier_ok(dev->netdev)) {
495                         netif_carrier_off(dev->netdev);
496                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
497                 }
498         } else {
499                 if (!netif_carrier_ok(dev->netdev)) {
500                         netif_carrier_on(dev->netdev);
501                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
502                 }
503         }
504 
505 resubmit:
506         res = usb_submit_urb (urb, GFP_ATOMIC);
507         if (res == -ENODEV)
508                 netif_device_detach(dev->netdev);
509         else if (res)
510                 dev_err(&dev->udev->dev,
511                         "can't resubmit intr, %s-%s/input0, status %d\n",
512                         dev->udev->bus->bus_name, dev->udev->devpath, res);
513 }
514 
515 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
516 {
517         rtl8150_t *dev = usb_get_intfdata(intf);
518 
519         netif_device_detach(dev->netdev);
520 
521         if (netif_running(dev->netdev)) {
522                 usb_kill_urb(dev->rx_urb);
523                 usb_kill_urb(dev->intr_urb);
524         }
525         return 0;
526 }
527 
528 static int rtl8150_resume(struct usb_interface *intf)
529 {
530         rtl8150_t *dev = usb_get_intfdata(intf);
531 
532         netif_device_attach(dev->netdev);
533         if (netif_running(dev->netdev)) {
534                 dev->rx_urb->status = 0;
535                 dev->rx_urb->actual_length = 0;
536                 read_bulk_callback(dev->rx_urb);
537 
538                 dev->intr_urb->status = 0;
539                 dev->intr_urb->actual_length = 0;
540                 intr_callback(dev->intr_urb);
541         }
542         return 0;
543 }
544 
545 /*
546 **
547 **      network related part of the code
548 **
549 */
550 
551 static void fill_skb_pool(rtl8150_t *dev)
552 {
553         struct sk_buff *skb;
554         int i;
555 
556         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
557                 if (dev->rx_skb_pool[i])
558                         continue;
559                 skb = dev_alloc_skb(RTL8150_MTU + 2);
560                 if (!skb) {
561                         return;
562                 }
563                 skb_reserve(skb, 2);
564                 dev->rx_skb_pool[i] = skb;
565         }
566 }
567 
568 static void free_skb_pool(rtl8150_t *dev)
569 {
570         int i;
571 
572         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
573                 if (dev->rx_skb_pool[i])
574                         dev_kfree_skb(dev->rx_skb_pool[i]);
575 }
576 
577 static void rx_fixup(unsigned long data)
578 {
579         struct rtl8150 *dev = (struct rtl8150 *)data;
580         struct sk_buff *skb;
581         int status;
582 
583         spin_lock_irq(&dev->rx_pool_lock);
584         fill_skb_pool(dev);
585         spin_unlock_irq(&dev->rx_pool_lock);
586         if (test_bit(RX_URB_FAIL, &dev->flags))
587                 if (dev->rx_skb)
588                         goto try_again;
589         spin_lock_irq(&dev->rx_pool_lock);
590         skb = pull_skb(dev);
591         spin_unlock_irq(&dev->rx_pool_lock);
592         if (skb == NULL)
593                 goto tlsched;
594         dev->rx_skb = skb;
595         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
596                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
597 try_again:
598         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
599         if (status == -ENODEV) {
600                 netif_device_detach(dev->netdev);
601         } else if (status) {
602                 set_bit(RX_URB_FAIL, &dev->flags);
603                 goto tlsched;
604         } else {
605                 clear_bit(RX_URB_FAIL, &dev->flags);
606         }
607 
608         return;
609 tlsched:
610         tasklet_schedule(&dev->tl);
611 }
612 
613 static int enable_net_traffic(rtl8150_t * dev)
614 {
615         u8 cr, tcr, rcr, msr;
616 
617         if (!rtl8150_reset(dev)) {
618                 dev_warn(&dev->udev->dev, "device reset failed\n");
619         }
620         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
621         rcr = 0x9e;
622         tcr = 0xd8;
623         cr = 0x0c;
624         if (!(rcr & 0x80))
625                 set_bit(RTL8150_HW_CRC, &dev->flags);
626         set_registers(dev, RCR, 1, &rcr);
627         set_registers(dev, TCR, 1, &tcr);
628         set_registers(dev, CR, 1, &cr);
629         get_registers(dev, MSR, 1, &msr);
630 
631         return 0;
632 }
633 
634 static void disable_net_traffic(rtl8150_t * dev)
635 {
636         u8 cr;
637 
638         get_registers(dev, CR, 1, &cr);
639         cr &= 0xf3;
640         set_registers(dev, CR, 1, &cr);
641 }
642 
643 static void rtl8150_tx_timeout(struct net_device *netdev)
644 {
645         rtl8150_t *dev = netdev_priv(netdev);
646         dev_warn(&netdev->dev, "Tx timeout.\n");
647         usb_unlink_urb(dev->tx_urb);
648         netdev->stats.tx_errors++;
649 }
650 
651 static void rtl8150_set_multicast(struct net_device *netdev)
652 {
653         rtl8150_t *dev = netdev_priv(netdev);
654         u16 rx_creg = 0x9e;
655 
656         netif_stop_queue(netdev);
657         if (netdev->flags & IFF_PROMISC) {
658                 rx_creg |= 0x0001;
659                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
660         } else if (!netdev_mc_empty(netdev) ||
661                    (netdev->flags & IFF_ALLMULTI)) {
662                 rx_creg &= 0xfffe;
663                 rx_creg |= 0x0002;
664                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
665         } else {
666                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
667                 rx_creg &= 0x00fc;
668         }
669         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
670         netif_wake_queue(netdev);
671 }
672 
673 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
674                                             struct net_device *netdev)
675 {
676         rtl8150_t *dev = netdev_priv(netdev);
677         int count, res;
678 
679         netif_stop_queue(netdev);
680         count = (skb->len < 60) ? 60 : skb->len;
681         count = (count & 0x3f) ? count : count + 1;
682         dev->tx_skb = skb;
683         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
684                       skb->data, count, write_bulk_callback, dev);
685         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
686                 /* Can we get/handle EPIPE here? */
687                 if (res == -ENODEV)
688                         netif_device_detach(dev->netdev);
689                 else {
690                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
691                         netdev->stats.tx_errors++;
692                         netif_start_queue(netdev);
693                 }
694         } else {
695                 netdev->stats.tx_packets++;
696                 netdev->stats.tx_bytes += skb->len;
697                 netdev->trans_start = jiffies;
698         }
699 
700         return NETDEV_TX_OK;
701 }
702 
703 
704 static void set_carrier(struct net_device *netdev)
705 {
706         rtl8150_t *dev = netdev_priv(netdev);
707         short tmp;
708 
709         get_registers(dev, CSCR, 2, &tmp);
710         if (tmp & CSCR_LINK_STATUS)
711                 netif_carrier_on(netdev);
712         else
713                 netif_carrier_off(netdev);
714 }
715 
716 static int rtl8150_open(struct net_device *netdev)
717 {
718         rtl8150_t *dev = netdev_priv(netdev);
719         int res;
720 
721         if (dev->rx_skb == NULL)
722                 dev->rx_skb = pull_skb(dev);
723         if (!dev->rx_skb)
724                 return -ENOMEM;
725 
726         set_registers(dev, IDR, 6, netdev->dev_addr);
727 
728         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
729                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
730         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
731                 if (res == -ENODEV)
732                         netif_device_detach(dev->netdev);
733                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
734                 return res;
735         }
736         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
737                      dev->intr_buff, INTBUFSIZE, intr_callback,
738                      dev, dev->intr_interval);
739         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
740                 if (res == -ENODEV)
741                         netif_device_detach(dev->netdev);
742                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
743                 usb_kill_urb(dev->rx_urb);
744                 return res;
745         }
746         enable_net_traffic(dev);
747         set_carrier(netdev);
748         netif_start_queue(netdev);
749 
750         return res;
751 }
752 
753 static int rtl8150_close(struct net_device *netdev)
754 {
755         rtl8150_t *dev = netdev_priv(netdev);
756         int res = 0;
757 
758         netif_stop_queue(netdev);
759         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
760                 disable_net_traffic(dev);
761         unlink_all_urbs(dev);
762 
763         return res;
764 }
765 
766 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
767 {
768         rtl8150_t *dev = netdev_priv(netdev);
769 
770         strlcpy(info->driver, driver_name, sizeof(info->driver));
771         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
772         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
773 }
774 
775 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
776 {
777         rtl8150_t *dev = netdev_priv(netdev);
778         short lpa, bmcr;
779 
780         ecmd->supported = (SUPPORTED_10baseT_Half |
781                           SUPPORTED_10baseT_Full |
782                           SUPPORTED_100baseT_Half |
783                           SUPPORTED_100baseT_Full |
784                           SUPPORTED_Autoneg |
785                           SUPPORTED_TP | SUPPORTED_MII);
786         ecmd->port = PORT_TP;
787         ecmd->transceiver = XCVR_INTERNAL;
788         ecmd->phy_address = dev->phy;
789         get_registers(dev, BMCR, 2, &bmcr);
790         get_registers(dev, ANLP, 2, &lpa);
791         if (bmcr & BMCR_ANENABLE) {
792                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
793                              SPEED_100 : SPEED_10);
794                 ethtool_cmd_speed_set(ecmd, speed);
795                 ecmd->autoneg = AUTONEG_ENABLE;
796                 if (speed == SPEED_100)
797                         ecmd->duplex = (lpa & LPA_100FULL) ?
798                             DUPLEX_FULL : DUPLEX_HALF;
799                 else
800                         ecmd->duplex = (lpa & LPA_10FULL) ?
801                             DUPLEX_FULL : DUPLEX_HALF;
802         } else {
803                 ecmd->autoneg = AUTONEG_DISABLE;
804                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
805                                              SPEED_100 : SPEED_10));
806                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
807                     DUPLEX_FULL : DUPLEX_HALF;
808         }
809         return 0;
810 }
811 
812 static const struct ethtool_ops ops = {
813         .get_drvinfo = rtl8150_get_drvinfo,
814         .get_settings = rtl8150_get_settings,
815         .get_link = ethtool_op_get_link
816 };
817 
818 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
819 {
820         rtl8150_t *dev = netdev_priv(netdev);
821         u16 *data = (u16 *) & rq->ifr_ifru;
822         int res = 0;
823 
824         switch (cmd) {
825         case SIOCDEVPRIVATE:
826                 data[0] = dev->phy;
827         case SIOCDEVPRIVATE + 1:
828                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
829                 break;
830         case SIOCDEVPRIVATE + 2:
831                 if (!capable(CAP_NET_ADMIN))
832                         return -EPERM;
833                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
834                 break;
835         default:
836                 res = -EOPNOTSUPP;
837         }
838 
839         return res;
840 }
841 
842 static const struct net_device_ops rtl8150_netdev_ops = {
843         .ndo_open               = rtl8150_open,
844         .ndo_stop               = rtl8150_close,
845         .ndo_do_ioctl           = rtl8150_ioctl,
846         .ndo_start_xmit         = rtl8150_start_xmit,
847         .ndo_tx_timeout         = rtl8150_tx_timeout,
848         .ndo_set_rx_mode        = rtl8150_set_multicast,
849         .ndo_set_mac_address    = rtl8150_set_mac_address,
850 
851         .ndo_change_mtu         = eth_change_mtu,
852         .ndo_validate_addr      = eth_validate_addr,
853 };
854 
855 static int rtl8150_probe(struct usb_interface *intf,
856                          const struct usb_device_id *id)
857 {
858         struct usb_device *udev = interface_to_usbdev(intf);
859         rtl8150_t *dev;
860         struct net_device *netdev;
861 
862         netdev = alloc_etherdev(sizeof(rtl8150_t));
863         if (!netdev)
864                 return -ENOMEM;
865 
866         dev = netdev_priv(netdev);
867 
868         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
869         if (!dev->intr_buff) {
870                 free_netdev(netdev);
871                 return -ENOMEM;
872         }
873 
874         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
875         spin_lock_init(&dev->rx_pool_lock);
876 
877         dev->udev = udev;
878         dev->netdev = netdev;
879         netdev->netdev_ops = &rtl8150_netdev_ops;
880         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
881         netdev->ethtool_ops = &ops;
882         dev->intr_interval = 100;       /* 100ms */
883 
884         if (!alloc_all_urbs(dev)) {
885                 dev_err(&intf->dev, "out of memory\n");
886                 goto out;
887         }
888         if (!rtl8150_reset(dev)) {
889                 dev_err(&intf->dev, "couldn't reset the device\n");
890                 goto out1;
891         }
892         fill_skb_pool(dev);
893         set_ethernet_addr(dev);
894 
895         usb_set_intfdata(intf, dev);
896         SET_NETDEV_DEV(netdev, &intf->dev);
897         if (register_netdev(netdev) != 0) {
898                 dev_err(&intf->dev, "couldn't register the device\n");
899                 goto out2;
900         }
901 
902         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
903 
904         return 0;
905 
906 out2:
907         usb_set_intfdata(intf, NULL);
908         free_skb_pool(dev);
909 out1:
910         free_all_urbs(dev);
911 out:
912         kfree(dev->intr_buff);
913         free_netdev(netdev);
914         return -EIO;
915 }
916 
917 static void rtl8150_disconnect(struct usb_interface *intf)
918 {
919         rtl8150_t *dev = usb_get_intfdata(intf);
920 
921         usb_set_intfdata(intf, NULL);
922         if (dev) {
923                 set_bit(RTL8150_UNPLUG, &dev->flags);
924                 tasklet_kill(&dev->tl);
925                 unregister_netdev(dev->netdev);
926                 unlink_all_urbs(dev);
927                 free_all_urbs(dev);
928                 free_skb_pool(dev);
929                 if (dev->rx_skb)
930                         dev_kfree_skb(dev->rx_skb);
931                 kfree(dev->intr_buff);
932                 free_netdev(dev->netdev);
933         }
934 }
935 
936 static struct usb_driver rtl8150_driver = {
937         .name           = driver_name,
938         .probe          = rtl8150_probe,
939         .disconnect     = rtl8150_disconnect,
940         .id_table       = rtl8150_table,
941         .suspend        = rtl8150_suspend,
942         .resume         = rtl8150_resume,
943         .disable_hub_initiated_lpm = 1,
944 };
945 
946 module_usb_driver(rtl8150_driver);
947 
948 MODULE_AUTHOR(DRIVER_AUTHOR);
949 MODULE_DESCRIPTION(DRIVER_DESC);
950 MODULE_LICENSE("GPL");
951 

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