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Merge tag 'lsm-pr-20231109' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm
[linux-block.git] / drivers / net / usb / kaweth.c
CommitLineData
aaf4989b 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/****************************************************************
3 *
4 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
5 *
6 * (c) 2000 Interlan Communications
7 * (c) 2000 Stephane Alnet
8 * (C) 2001 Brad Hards
9 * (C) 2002 Oliver Neukum
10 *
11 * Original author: The Zapman <zapman@interlan.net>
12 * Inspired by, and much credit goes to Michael Rothwell
13 * <rothwell@interlan.net> for the test equipment, help, and patience
14 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
15 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
16 * for providing the firmware and driver resources.
17 *
1da177e4
LT		 18 ****************************************************************/
19
20/* TODO:
1da177e4
LT		 21 * Develop test procedures for USB net interfaces
22 * Run test procedures
23 * Fix bugs from previous two steps
24 * Snoop other OSs for any tricks we're not doing
1da177e4
LT		 25 * Reduce arbitrary timeouts
26 * Smart multicast support
27 * Temporary MAC change support
28 * Tunable SOFs parameter - ioctl()?
29 * Ethernet stats collection
30 * Code formatting improvements
31 */
32
33#include <linux/module.h>
1da177e4
LT		 34#include <linux/slab.h>
35#include <linux/string.h>
1da177e4
LT		 36#include <linux/delay.h>
37#include <linux/netdevice.h>
38#include <linux/etherdevice.h>
39#include <linux/usb.h>
40#include <linux/types.h>
41#include <linux/ethtool.h>
1da177e4
LT		 42#include <linux/dma-mapping.h>
43#include <linux/wait.h>
79682499 44#include <linux/firmware.h>
7c0f6ba6 45#include <linux/uaccess.h>
1da177e4
LT		 46#include <asm/byteorder.h>
47
48#undef DEBUG
49
1da177e4
LT		 50#define KAWETH_MTU 1514
51#define KAWETH_BUF_SIZE 1664
52#define KAWETH_TX_TIMEOUT (5 * HZ)
53#define KAWETH_SCRATCH_SIZE 32
54#define KAWETH_FIRMWARE_BUF_SIZE 4096
2b2b2e35 55#define KAWETH_CONTROL_TIMEOUT (30000)
1da177e4
LT		 56
57#define KAWETH_STATUS_BROKEN 0x0000001
58#define KAWETH_STATUS_CLOSING 0x0000002
1a2ea1df
ON		 59#define KAWETH_STATUS_SUSPENDING 0x0000004
60
61#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
1da177e4
LT		 62
63#define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
64#define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
65#define KAWETH_PACKET_FILTER_DIRECTED 0x04
66#define KAWETH_PACKET_FILTER_BROADCAST 0x08
67#define KAWETH_PACKET_FILTER_MULTICAST 0x10
68
69/* Table 7 */
70#define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
71#define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
72#define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
73#define KAWETH_COMMAND_STATISTICS 0x03
74#define KAWETH_COMMAND_SET_TEMP_MAC 0x06
75#define KAWETH_COMMAND_GET_TEMP_MAC 0x07
76#define KAWETH_COMMAND_SET_URB_SIZE 0x08
77#define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
78#define KAWETH_COMMAND_SCAN 0xFF
79
80#define KAWETH_SOFS_TO_WAIT 0x05
81
82#define INTBUFFERSIZE 4
83
84#define STATE_OFFSET 0
85#define STATE_MASK 0x40
86#define STATE_SHIFT 5
87
1a2ea1df
ON		 88#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
89
1da177e4
LT		 90
91MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
92MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
93MODULE_LICENSE("GPL");
79682499
DW		 94MODULE_FIRMWARE("kaweth/new_code.bin");
95MODULE_FIRMWARE("kaweth/new_code_fix.bin");
96MODULE_FIRMWARE("kaweth/trigger_code.bin");
97MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
1da177e4
LT		 98
99static const char driver_name[] = "kaweth";
100
101static int kaweth_probe(
102 struct usb_interface *intf,
103 const struct usb_device_id *id /* from id_table */
104 );
105static void kaweth_disconnect(struct usb_interface *intf);
1a2ea1df
ON		 106static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
107static int kaweth_resume(struct usb_interface *intf);
1da177e4
LT		 108
109/****************************************************************
110 * usb_device_id
111 ****************************************************************/
06fa59a0 112static const struct usb_device_id usb_klsi_table[] = {
1da177e4
LT		 113 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
114 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
115 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
116 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
117 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
118 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
119 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
120 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
121 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
122 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
123 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
124 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
125 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
126 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
127 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
128 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
129 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
dacf4fc8 130 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
1da177e4
LT		 131 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
132 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
133 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
134 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
135 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
136 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
137 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
138 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
139 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
140 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
141 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
142 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
143 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
144 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
145 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
486ba2a9 146 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
1da177e4
LT		 147 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
148 {} /* Null terminator */
149};
150
151MODULE_DEVICE_TABLE (usb, usb_klsi_table);
152
153/****************************************************************
154 * kaweth_driver
155 ****************************************************************/
156static struct usb_driver kaweth_driver = {
1da177e4
LT		 157 .name = driver_name,
158 .probe = kaweth_probe,
159 .disconnect = kaweth_disconnect,
1a2ea1df
ON		 160 .suspend = kaweth_suspend,
161 .resume = kaweth_resume,
1da177e4 162 .id_table = usb_klsi_table,
b98b98f9 163 .supports_autosuspend = 1,
e1f12eb6 164 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 165};
166
167typedef __u8 eth_addr_t[6];
168
169/****************************************************************
170 * usb_eth_dev
171 ****************************************************************/
172struct usb_eth_dev {
173 char *name;
174 __u16 vendor;
175 __u16 device;
176 void *pdata;
177};
178
179/****************************************************************
180 * kaweth_ethernet_configuration
181 * Refer Table 8
182 ****************************************************************/
183struct kaweth_ethernet_configuration
184{
185 __u8 size;
186 __u8 reserved1;
187 __u8 reserved2;
188 eth_addr_t hw_addr;
189 __u32 statistics_mask;
190 __le16 segment_size;
191 __u16 max_multicast_filters;
192 __u8 reserved3;
ba2d3587 193} __packed;
1da177e4
LT		 194
195/****************************************************************
196 * kaweth_device
197 ****************************************************************/
198struct kaweth_device
199{
200 spinlock_t device_lock;
201
202 __u32 status;
203 int end;
1da177e4
LT		 204 int suspend_lowmem_rx;
205 int suspend_lowmem_ctrl;
206 int linkstate;
1a2ea1df 207 int opened;
c4028958 208 struct delayed_work lowmem_work;
1da177e4
LT		 209
210 struct usb_device *dev;
b98b98f9 211 struct usb_interface *intf;
1da177e4
LT		 212 struct net_device *net;
213 wait_queue_head_t term_wait;
214
215 struct urb *rx_urb;
216 struct urb *tx_urb;
217 struct urb *irq_urb;
218
219 dma_addr_t intbufferhandle;
220 __u8 *intbuffer;
221 dma_addr_t rxbufferhandle;
222 __u8 *rx_buf;
223
efe3e6b5 224
1da177e4
LT		 225 struct sk_buff *tx_skb;
226
227 __u8 *firmware_buf;
228 __u8 scratch[KAWETH_SCRATCH_SIZE];
229 __u16 packet_filter_bitmap;
230
231 struct kaweth_ethernet_configuration configuration;
1da177e4
LT		 232};
233
1da177e4
LT		 234/****************************************************************
235 * kaweth_read_configuration
236 ****************************************************************/
237static int kaweth_read_configuration(struct kaweth_device *kaweth)
238{
af3563be 239 return usb_control_msg(kaweth->dev, usb_rcvctrlpipe(kaweth->dev, 0),
1da177e4
LT		 240 KAWETH_COMMAND_GET_ETHERNET_DESC,
241 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
af3563be
SAS		 242 0, 0,
243 &kaweth->configuration,
1da177e4
LT		 244 sizeof(kaweth->configuration),
245 KAWETH_CONTROL_TIMEOUT);
1da177e4
LT		 246}
247
248/****************************************************************
249 * kaweth_set_urb_size
250 ****************************************************************/
251static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
252{
49ae25b0 253 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
1da177e4 254
af3563be
SAS		 255 return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
256 KAWETH_COMMAND_SET_URB_SIZE,
257 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
258 urb_size, 0,
259 &kaweth->scratch, 0,
260 KAWETH_CONTROL_TIMEOUT);
1da177e4
LT		 261}
262
263/****************************************************************
264 * kaweth_set_sofs_wait
265 ****************************************************************/
266static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
267{
49ae25b0 268 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
1da177e4 269
af3563be
SAS		 270 return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
271 KAWETH_COMMAND_SET_SOFS_WAIT,
272 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
273 sofs_wait, 0,
274 &kaweth->scratch, 0,
275 KAWETH_CONTROL_TIMEOUT);
1da177e4
LT		 276}
277
278/****************************************************************
279 * kaweth_set_receive_filter
280 ****************************************************************/
281static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
282 __u16 receive_filter)
283{
49ae25b0
GKH		 284 netdev_dbg(kaweth->net, "Set receive filter to %d\n",
285 (unsigned)receive_filter);
1da177e4 286
af3563be
SAS		 287 return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
288 KAWETH_COMMAND_SET_PACKET_FILTER,
289 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
290 receive_filter, 0,
291 &kaweth->scratch, 0,
292 KAWETH_CONTROL_TIMEOUT);
1da177e4
LT		 293}
294
295/****************************************************************
296 * kaweth_download_firmware
297 ****************************************************************/
298static int kaweth_download_firmware(struct kaweth_device *kaweth,
79682499 299 const char *fwname,
1da177e4
LT		 300 __u8 interrupt,
301 __u8 type)
302{
79682499
DW		 303 const struct firmware *fw;
304 int data_len;
305 int ret;
306
307 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
308 if (ret) {
db6b2219 309 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
79682499
DW		 310 return ret;
311 }
312
313 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
db6b2219
GKH		 314 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
315 fw->size);
986e3f6e 316 release_firmware(fw);
1da177e4
LT		 317 return -ENOSPC;
318 }
79682499
DW		 319 data_len = fw->size;
320 memcpy(kaweth->firmware_buf, fw->data, fw->size);
1da177e4 321
79682499 322 release_firmware(fw);
1da177e4
LT		 323
324 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
325 kaweth->firmware_buf[3] = data_len >> 8;
326 kaweth->firmware_buf[4] = type;
327 kaweth->firmware_buf[5] = interrupt;
328
49ae25b0 329 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
1da177e4
LT		 330 kaweth->firmware_buf[2]);
331
49ae25b0
GKH		 332 netdev_dbg(kaweth->net,
333 "Downloading firmware at %p to kaweth device at %p\n",
0abc1cee 334 kaweth->firmware_buf, kaweth);
49ae25b0 335 netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
1da177e4 336
af3563be 337 return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
1da177e4
LT		 338 KAWETH_COMMAND_SCAN,
339 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
af3563be
SAS		 340 0, 0,
341 kaweth->firmware_buf, data_len,
1da177e4
LT		 342 KAWETH_CONTROL_TIMEOUT);
343}
344
345/****************************************************************
346 * kaweth_trigger_firmware
347 ****************************************************************/
348static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
349 __u8 interrupt)
350{
351 kaweth->firmware_buf[0] = 0xB6;
352 kaweth->firmware_buf[1] = 0xC3;
353 kaweth->firmware_buf[2] = 0x01;
354 kaweth->firmware_buf[3] = 0x00;
355 kaweth->firmware_buf[4] = 0x06;
356 kaweth->firmware_buf[5] = interrupt;
357 kaweth->firmware_buf[6] = 0x00;
358 kaweth->firmware_buf[7] = 0x00;
359
af3563be
SAS		 360 return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
361 KAWETH_COMMAND_SCAN,
362 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
363 0, 0,
364 (void *)kaweth->firmware_buf, 8,
365 KAWETH_CONTROL_TIMEOUT);
1da177e4
LT		 366}
367
368/****************************************************************
369 * kaweth_reset
370 ****************************************************************/
371static int kaweth_reset(struct kaweth_device *kaweth)
372{
373 int result;
374
f0816ce3 375 result = usb_reset_configuration(kaweth->dev);
f2d45cd9 376 mdelay(10);
1da177e4 377
49ae25b0 378 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
1da177e4
LT		 379
380 return result;
381}
382
7d12e780 383static void kaweth_usb_receive(struct urb *);
55016f10 384static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
1da177e4
LT		 385
386/****************************************************************
387 int_callback
388*****************************************************************/
389
55016f10 390static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
1da177e4
LT		 391{
392 int status;
393
394 status = usb_submit_urb (kaweth->irq_urb, mf);
395 if (unlikely(status == -ENOMEM)) {
396 kaweth->suspend_lowmem_ctrl = 1;
397 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
398 } else {
399 kaweth->suspend_lowmem_ctrl = 0;
400 }
401
402 if (status)
db6b2219
GKH		 403 dev_err(&kaweth->intf->dev,
404 "can't resubmit intr, %s-%s, status %d\n",
405 kaweth->dev->bus->bus_name,
406 kaweth->dev->devpath, status);
1da177e4
LT		 407}
408
7d12e780 409static void int_callback(struct urb *u)
1da177e4
LT		 410{
411 struct kaweth_device *kaweth = u->context;
412 int act_state;
c94cb314 413 int status = u->status;
1da177e4 414
c94cb314 415 switch (status) {
1da177e4
LT		 416 case 0: /* success */
417 break;
418 case -ECONNRESET: /* unlink */
419 case -ENOENT:
420 case -ESHUTDOWN:
421 return;
422 /* -EPIPE: should clear the halt */
423 default: /* error */
424 goto resubmit;
425 }
426
427 /* we check the link state to report changes */
428 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
58125f95 429 if (act_state)
1da177e4
LT		 430 netif_carrier_on(kaweth->net);
431 else
432 netif_carrier_off(kaweth->net);
433
434 kaweth->linkstate = act_state;
435 }
436resubmit:
437 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
438}
439
c4028958 440static void kaweth_resubmit_tl(struct work_struct *work)
1da177e4 441{
c4028958
DH		 442 struct kaweth_device *kaweth =
443 container_of(work, struct kaweth_device, lowmem_work.work);
1da177e4 444
1a2ea1df 445 if (IS_BLOCKED(kaweth->status))
1da177e4
LT		 446 return;
447
448 if (kaweth->suspend_lowmem_rx)
449 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
450
451 if (kaweth->suspend_lowmem_ctrl)
452 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
453}
454
455
456/****************************************************************
457 * kaweth_resubmit_rx_urb
458 ****************************************************************/
459static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
55016f10 460 gfp_t mem_flags)
1da177e4
LT		 461{
462 int result;
463
464 usb_fill_bulk_urb(kaweth->rx_urb,
465 kaweth->dev,
466 usb_rcvbulkpipe(kaweth->dev, 1),
467 kaweth->rx_buf,
468 KAWETH_BUF_SIZE,
469 kaweth_usb_receive,
470 kaweth);
471 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
472 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
473
474 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
475 if (result == -ENOMEM) {
476 kaweth->suspend_lowmem_rx = 1;
477 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
478 }
db6b2219
GKH		 479 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
480 result);
1da177e4
LT		 481 } else {
482 kaweth->suspend_lowmem_rx = 0;
483 }
484
485 return result;
486}
487
a19c2619
SAS		 488static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth,
489 bool may_sleep);
1da177e4
LT		 490
491/****************************************************************
492 * kaweth_usb_receive
493 ****************************************************************/
7d12e780 494static void kaweth_usb_receive(struct urb *urb)
1da177e4 495{
49ae25b0 496 struct device *dev = &urb->dev->dev;
1da177e4
LT		 497 struct kaweth_device *kaweth = urb->context;
498 struct net_device *net = kaweth->net;
c94cb314 499 int status = urb->status;
ba49fed8 500 unsigned long flags;
1da177e4
LT		 501 int count = urb->actual_length;
502 int count2 = urb->transfer_buffer_length;
503
504 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
505
506 struct sk_buff *skb;
507
710b523a 508 if (unlikely(status == -EPIPE)) {
6ffa770e 509 net->stats.rx_errors++;
1da177e4
LT		 510 kaweth->end = 1;
511 wake_up(&kaweth->term_wait);
49ae25b0 512 dev_dbg(dev, "Status was -EPIPE.\n");
1da177e4
LT		 513 return;
514 }
710b523a
LF		 515 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
516 /* we are killed - set a flag and wake the disconnect handler */
517 kaweth->end = 1;
518 wake_up(&kaweth->term_wait);
49ae25b0 519 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
710b523a
LF		 520 return;
521 }
522 if (unlikely(status == -EPROTO || status == -ETIME ||
523 status == -EILSEQ)) {
6ffa770e 524 net->stats.rx_errors++;
49ae25b0 525 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
710b523a
LF		 526 return;
527 }
528 if (unlikely(status == -EOVERFLOW)) {
6ffa770e 529 net->stats.rx_errors++;
49ae25b0 530 dev_dbg(dev, "Status was -EOVERFLOW.\n");
710b523a 531 }
ba49fed8 532 spin_lock_irqsave(&kaweth->device_lock, flags);
1a2ea1df 533 if (IS_BLOCKED(kaweth->status)) {
ba49fed8 534 spin_unlock_irqrestore(&kaweth->device_lock, flags);
1da177e4 535 return;
1a2ea1df 536 }
ba49fed8 537 spin_unlock_irqrestore(&kaweth->device_lock, flags);
1da177e4 538
c94cb314 539 if(status && status != -EREMOTEIO && count != 1) {
db6b2219
GKH		 540 dev_err(&kaweth->intf->dev,
541 "%s RX status: %d count: %d packet_len: %d\n",
542 net->name, status, count, (int)pkt_len);
1da177e4
LT		 543 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
544 return;
545 }
546
547 if(kaweth->net && (count > 2)) {
548 if(pkt_len > (count - 2)) {
db6b2219
GKH		 549 dev_err(&kaweth->intf->dev,
550 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
551 pkt_len, count);
552 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
553 pkt_len & 2047);
554 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
1da177e4
LT		 555 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
556 return;
557 }
558
559 if(!(skb = dev_alloc_skb(pkt_len+2))) {
560 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
561 return;
562 }
563
564 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
565
8c7b7faa 566 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
1da177e4
LT		 567
568 skb_put(skb, pkt_len);
569
570 skb->protocol = eth_type_trans(skb, net);
571
572 netif_rx(skb);
573
6ffa770e
TK		 574 net->stats.rx_packets++;
575 net->stats.rx_bytes += pkt_len;
1da177e4
LT		 576 }
577
578 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
579}
580
581/****************************************************************
582 * kaweth_open
583 ****************************************************************/
584static int kaweth_open(struct net_device *net)
585{
586 struct kaweth_device *kaweth = netdev_priv(net);
587 int res;
588
b98b98f9
ON		 589 res = usb_autopm_get_interface(kaweth->intf);
590 if (res) {
db6b2219 591 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
b98b98f9
ON		 592 return -EIO;
593 }
1da177e4
LT		 594 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
595 if (res)
b98b98f9 596 goto err_out;
1da177e4
LT		 597
598 usb_fill_int_urb(
599 kaweth->irq_urb,
600 kaweth->dev,
601 usb_rcvintpipe(kaweth->dev, 3),
602 kaweth->intbuffer,
603 INTBUFFERSIZE,
604 int_callback,
605 kaweth,
606 250); /* overriding the descriptor */
607 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
608 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
609
610 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
611 if (res) {
612 usb_kill_urb(kaweth->rx_urb);
b98b98f9 613 goto err_out;
1da177e4 614 }
1a2ea1df 615 kaweth->opened = 1;
1da177e4
LT		 616
617 netif_start_queue(net);
618
a19c2619 619 kaweth_async_set_rx_mode(kaweth, true);
1da177e4 620 return 0;
b98b98f9
ON		 621
622err_out:
ceb0c77e 623 usb_autopm_put_interface(kaweth->intf);
b98b98f9 624 return -EIO;
1da177e4
LT		 625}
626
627/****************************************************************
b98b98f9 628 * kaweth_kill_urbs
1da177e4 629 ****************************************************************/
1a2ea1df 630static void kaweth_kill_urbs(struct kaweth_device *kaweth)
1da177e4 631{
1da177e4
LT		 632 usb_kill_urb(kaweth->irq_urb);
633 usb_kill_urb(kaweth->rx_urb);
d23b536b 634 usb_kill_urb(kaweth->tx_urb);
1da177e4 635
4bb073c0 636 cancel_delayed_work_sync(&kaweth->lowmem_work);
1da177e4
LT		 637
638 /* a scheduled work may have resubmitted,
639 we hit them again */
640 usb_kill_urb(kaweth->irq_urb);
641 usb_kill_urb(kaweth->rx_urb);
1a2ea1df
ON		 642}
643
644/****************************************************************
645 * kaweth_close
646 ****************************************************************/
647static int kaweth_close(struct net_device *net)
648{
649 struct kaweth_device *kaweth = netdev_priv(net);
650
651 netif_stop_queue(net);
652 kaweth->opened = 0;
653
654 kaweth->status |= KAWETH_STATUS_CLOSING;
655
656 kaweth_kill_urbs(kaweth);
1da177e4
LT		 657
658 kaweth->status &= ~KAWETH_STATUS_CLOSING;
659
ceb0c77e 660 usb_autopm_put_interface(kaweth->intf);
b98b98f9 661
1da177e4
LT		 662 return 0;
663}
664
b3ebd522
ON		 665static u32 kaweth_get_link(struct net_device *dev)
666{
667 struct kaweth_device *kaweth = netdev_priv(dev);
668
669 return kaweth->linkstate;
1da177e4
LT		 670}
671
0fc0b732 672static const struct ethtool_ops ops = {
b3ebd522 673 .get_link = kaweth_get_link
1da177e4
LT		 674};
675
676/****************************************************************
677 * kaweth_usb_transmit_complete
678 ****************************************************************/
7d12e780 679static void kaweth_usb_transmit_complete(struct urb *urb)
1da177e4
LT		 680{
681 struct kaweth_device *kaweth = urb->context;
682 struct sk_buff *skb = kaweth->tx_skb;
c94cb314 683 int status = urb->status;
1da177e4 684
c94cb314
ON		 685 if (unlikely(status != 0))
686 if (status != -ENOENT)
49ae25b0
GKH		 687 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
688 kaweth->net->name, status);
1da177e4
LT		 689
690 netif_wake_queue(kaweth->net);
691 dev_kfree_skb_irq(skb);
692}
693
694/****************************************************************
695 * kaweth_start_xmit
696 ****************************************************************/
25a79c41
SH		 697static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
698 struct net_device *net)
1da177e4
LT		 699{
700 struct kaweth_device *kaweth = netdev_priv(net);
701 __le16 *private_header;
702
703 int res;
704
4ff61c8f 705 spin_lock_irq(&kaweth->device_lock);
1da177e4 706
a19c2619 707 kaweth_async_set_rx_mode(kaweth, false);
1da177e4 708 netif_stop_queue(net);
1a2ea1df
ON		 709 if (IS_BLOCKED(kaweth->status)) {
710 goto skip;
711 }
1da177e4
LT		 712
713 /* We now decide whether we can put our special header into the sk_buff */
39fba783 714 if (skb_cow_head(skb, 2)) {
fb796707 715 net->stats.tx_errors++;
39fba783
ED		 716 netif_start_queue(net);
717 spin_unlock_irq(&kaweth->device_lock);
718 dev_kfree_skb_any(skb);
719 return NETDEV_TX_OK;
1da177e4
LT		 720 }
721
d58ff351 722 private_header = __skb_push(skb, 2);
1da177e4
LT		 723 *private_header = cpu_to_le16(skb->len-2);
724 kaweth->tx_skb = skb;
725
726 usb_fill_bulk_urb(kaweth->tx_urb,
727 kaweth->dev,
728 usb_sndbulkpipe(kaweth->dev, 2),
729 private_header,
730 skb->len,
731 kaweth_usb_transmit_complete,
732 kaweth);
733 kaweth->end = 0;
1da177e4
LT		 734
735 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
736 {
4dc89948 737 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
1a2ea1df 738skip:
6ffa770e 739 net->stats.tx_errors++;
1da177e4
LT		 740
741 netif_start_queue(net);
742 dev_kfree_skb_irq(skb);
743 }
744 else
745 {
6ffa770e
TK		 746 net->stats.tx_packets++;
747 net->stats.tx_bytes += skb->len;
1da177e4
LT		 748 }
749
4ff61c8f 750 spin_unlock_irq(&kaweth->device_lock);
1da177e4 751
6ed10654 752 return NETDEV_TX_OK;
1da177e4
LT		 753}
754
755/****************************************************************
756 * kaweth_set_rx_mode
757 ****************************************************************/
758static void kaweth_set_rx_mode(struct net_device *net)
759{
760 struct kaweth_device *kaweth = netdev_priv(net);
761
762 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
763 KAWETH_PACKET_FILTER_BROADCAST |
764 KAWETH_PACKET_FILTER_MULTICAST;
765
49ae25b0 766 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
1da177e4
LT		 767
768 netif_stop_queue(net);
769
770 if (net->flags & IFF_PROMISC) {
771 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
772 }
4cd24eaf 773 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1da177e4
LT		 774 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
775 }
776
777 kaweth->packet_filter_bitmap = packet_filter_bitmap;
778 netif_wake_queue(net);
779}
780
781/****************************************************************
782 * kaweth_async_set_rx_mode
783 ****************************************************************/
a19c2619
SAS		 784static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth,
785 bool may_sleep)
1da177e4 786{
a19c2619 787 int ret;
1da177e4 788 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
710b523a 789
1da177e4
LT		 790 kaweth->packet_filter_bitmap = 0;
791 if (packet_filter_bitmap == 0)
792 return;
793
a19c2619 794 if (!may_sleep)
710b523a
LF		 795 return;
796
a19c2619
SAS		 797 ret = usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
798 KAWETH_COMMAND_SET_PACKET_FILTER,
799 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
800 packet_filter_bitmap, 0,
801 &kaweth->scratch, 0,
802 KAWETH_CONTROL_TIMEOUT);
803 if (ret < 0)
db6b2219 804 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
a19c2619
SAS		 805 ret);
806 else
49ae25b0
GKH		 807 netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
808 packet_filter_bitmap);
1da177e4
LT		 809}
810
1da177e4
LT		 811/****************************************************************
812 * kaweth_tx_timeout
813 ****************************************************************/
0290bd29 814static void kaweth_tx_timeout(struct net_device *net, unsigned int txqueue)
1da177e4
LT		 815{
816 struct kaweth_device *kaweth = netdev_priv(net);
817
4dc89948 818 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
6ffa770e 819 net->stats.tx_errors++;
860e9538 820 netif_trans_update(net);
1da177e4
LT		 821
822 usb_unlink_urb(kaweth->tx_urb);
823}
824
1a2ea1df
ON		 825/****************************************************************
826 * kaweth_suspend
827 ****************************************************************/
828static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
829{
830 struct kaweth_device *kaweth = usb_get_intfdata(intf);
831 unsigned long flags;
832
833 spin_lock_irqsave(&kaweth->device_lock, flags);
834 kaweth->status |= KAWETH_STATUS_SUSPENDING;
835 spin_unlock_irqrestore(&kaweth->device_lock, flags);
836
837 kaweth_kill_urbs(kaweth);
838 return 0;
839}
840
841/****************************************************************
842 * kaweth_resume
843 ****************************************************************/
844static int kaweth_resume(struct usb_interface *intf)
845{
846 struct kaweth_device *kaweth = usb_get_intfdata(intf);
847 unsigned long flags;
848
849 spin_lock_irqsave(&kaweth->device_lock, flags);
850 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
851 spin_unlock_irqrestore(&kaweth->device_lock, flags);
852
853 if (!kaweth->opened)
854 return 0;
855 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
856 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
857
858 return 0;
859}
860
1da177e4
LT		 861/****************************************************************
862 * kaweth_probe
863 ****************************************************************/
321ea8b2
ON		 864
865
866static const struct net_device_ops kaweth_netdev_ops = {
867 .ndo_open = kaweth_open,
868 .ndo_stop = kaweth_close,
869 .ndo_start_xmit = kaweth_start_xmit,
870 .ndo_tx_timeout = kaweth_tx_timeout,
afc4b13d 871 .ndo_set_rx_mode = kaweth_set_rx_mode,
240c102d
BH		 872 .ndo_set_mac_address = eth_mac_addr,
873 .ndo_validate_addr = eth_validate_addr,
321ea8b2
ON		 874};
875
1da177e4
LT		 876static int kaweth_probe(
877 struct usb_interface *intf,
878 const struct usb_device_id *id /* from id_table */
879 )
880{
49ae25b0
GKH		 881 struct device *dev = &intf->dev;
882 struct usb_device *udev = interface_to_usbdev(intf);
1da177e4
LT		 883 struct kaweth_device *kaweth;
884 struct net_device *netdev;
885 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
886 int result = 0;
575ced7f 887 int rv = -EIO;
1da177e4 888
49ae25b0
GKH		 889 dev_dbg(dev,
890 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
891 udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
892 le16_to_cpu(udev->descriptor.idProduct),
893 le16_to_cpu(udev->descriptor.bcdDevice));
1da177e4 894
49ae25b0 895 dev_dbg(dev, "Device at %p\n", udev);
1da177e4 896
49ae25b0
GKH		 897 dev_dbg(dev, "Descriptor length: %x type: %x\n",
898 (int)udev->descriptor.bLength,
899 (int)udev->descriptor.bDescriptorType);
1da177e4
LT		 900
901 netdev = alloc_etherdev(sizeof(*kaweth));
902 if (!netdev)
903 return -ENOMEM;
904
905 kaweth = netdev_priv(netdev);
49ae25b0 906 kaweth->dev = udev;
1da177e4 907 kaweth->net = netdev;
60bcabd0 908 kaweth->intf = intf;
1da177e4
LT		 909
910 spin_lock_init(&kaweth->device_lock);
911 init_waitqueue_head(&kaweth->term_wait);
912
49ae25b0 913 dev_dbg(dev, "Resetting.\n");
1da177e4
LT		 914
915 kaweth_reset(kaweth);
916
917 /*
918 * If high byte of bcdDevice is nonzero, firmware is already
919 * downloaded. Don't try to do it again, or we'll hang the device.
920 */
921
49ae25b0
GKH		 922 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
923 dev_info(dev, "Firmware present in device.\n");
1da177e4
LT		 924 } else {
925 /* Download the firmware */
49ae25b0 926 dev_info(dev, "Downloading firmware...\n");
1da177e4 927 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
575ced7f
ON		 928 if (!kaweth->firmware_buf) {
929 rv = -ENOMEM;
930 goto err_free_netdev;
931 }
1da177e4 932 if ((result = kaweth_download_firmware(kaweth,
79682499 933 "kaweth/new_code.bin",
1da177e4
LT		 934 100,
935 2)) < 0) {
49ae25b0 936 dev_err(dev, "Error downloading firmware (%d)\n",
db6b2219 937 result);
1da177e4
LT		 938 goto err_fw;
939 }
940
941 if ((result = kaweth_download_firmware(kaweth,
79682499 942 "kaweth/new_code_fix.bin",
1da177e4
LT		 943 100,
944 3)) < 0) {
49ae25b0 945 dev_err(dev, "Error downloading firmware fix (%d)\n",
db6b2219 946 result);
1da177e4
LT		 947 goto err_fw;
948 }
949
950 if ((result = kaweth_download_firmware(kaweth,
79682499 951 "kaweth/trigger_code.bin",
1da177e4
LT		 952 126,
953 2)) < 0) {
49ae25b0 954 dev_err(dev, "Error downloading trigger code (%d)\n",
db6b2219 955 result);
1da177e4
LT		 956 goto err_fw;
957
958 }
959
960 if ((result = kaweth_download_firmware(kaweth,
79682499 961 "kaweth/trigger_code_fix.bin",
1da177e4
LT		 962 126,
963 3)) < 0) {
49ae25b0 964 dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
1da177e4
LT		 965 goto err_fw;
966 }
967
968
969 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
49ae25b0 970 dev_err(dev, "Error triggering firmware (%d)\n", result);
1da177e4
LT		 971 goto err_fw;
972 }
973
974 /* Device will now disappear for a moment... */
49ae25b0 975 dev_info(dev, "Firmware loaded. I'll be back...\n");
1da177e4
LT		 976err_fw:
977 free_page((unsigned long)kaweth->firmware_buf);
978 free_netdev(netdev);
979 return -EIO;
980 }
981
982 result = kaweth_read_configuration(kaweth);
983
984 if(result < 0) {
49ae25b0 985 dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
1da177e4
LT		 986 goto err_free_netdev;
987 }
988
49ae25b0
GKH		 989 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
990 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
991 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
992 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
1da177e4
LT		 993
994 if(!memcmp(&kaweth->configuration.hw_addr,
995 &bcast_addr,
996 sizeof(bcast_addr))) {
49ae25b0 997 dev_err(dev, "Firmware not functioning properly, no net device created\n");
1da177e4
LT		 998 goto err_free_netdev;
999 }
1000
1001 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
49ae25b0 1002 dev_dbg(dev, "Error setting URB size\n");
1da177e4
LT		 1003 goto err_free_netdev;
1004 }
1005
1006 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
49ae25b0 1007 dev_err(dev, "Error setting SOFS wait\n");
1da177e4
LT		 1008 goto err_free_netdev;
1009 }
1010
1011 result = kaweth_set_receive_filter(kaweth,
1012 KAWETH_PACKET_FILTER_DIRECTED |
1013 KAWETH_PACKET_FILTER_BROADCAST |
1014 KAWETH_PACKET_FILTER_MULTICAST);
1015
1016 if(result < 0) {
49ae25b0 1017 dev_err(dev, "Error setting receive filter\n");
1da177e4
LT		 1018 goto err_free_netdev;
1019 }
1020
49ae25b0 1021 dev_dbg(dev, "Initializing net device.\n");
1da177e4
LT		 1022
1023 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1024 if (!kaweth->tx_urb)
1025 goto err_free_netdev;
1026 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1027 if (!kaweth->rx_urb)
1028 goto err_only_tx;
1029 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1030 if (!kaweth->irq_urb)
1031 goto err_tx_and_rx;
1032
997ea58e 1033 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1da177e4
LT		 1034 INTBUFFERSIZE,
1035 GFP_KERNEL,
1036 &kaweth->intbufferhandle);
1037 if (!kaweth->intbuffer)
1038 goto err_tx_and_rx_and_irq;
997ea58e 1039 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1da177e4
LT		 1040 KAWETH_BUF_SIZE,
1041 GFP_KERNEL,
1042 &kaweth->rxbufferhandle);
1043 if (!kaweth->rx_buf)
1044 goto err_all_but_rxbuf;
1045
1046 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
2674e7ea 1047 eth_hw_addr_set(netdev, (u8 *)&kaweth->configuration.hw_addr);
1da177e4 1048
321ea8b2 1049 netdev->netdev_ops = &kaweth_netdev_ops;
1da177e4 1050 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1da177e4 1051 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
7ad24ea4 1052 netdev->ethtool_ops = &ops;
1da177e4
LT		 1053
1054 /* kaweth is zeroed as part of alloc_netdev */
c4028958 1055 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1da177e4
LT		 1056 usb_set_intfdata(intf, kaweth);
1057
49ae25b0 1058 SET_NETDEV_DEV(netdev, dev);
1da177e4 1059 if (register_netdev(netdev) != 0) {
49ae25b0 1060 dev_err(dev, "Error registering netdev.\n");
1da177e4
LT		 1061 goto err_intfdata;
1062 }
1063
49ae25b0 1064 dev_info(dev, "kaweth interface created at %s\n",
880c9c66 1065 kaweth->net->name);
1da177e4 1066
1da177e4
LT		 1067 return 0;
1068
1069err_intfdata:
1070 usb_set_intfdata(intf, NULL);
997ea58e 1071 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1da177e4 1072err_all_but_rxbuf:
997ea58e 1073 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1da177e4
LT		 1074err_tx_and_rx_and_irq:
1075 usb_free_urb(kaweth->irq_urb);
1076err_tx_and_rx:
1077 usb_free_urb(kaweth->rx_urb);
1078err_only_tx:
1079 usb_free_urb(kaweth->tx_urb);
1080err_free_netdev:
1081 free_netdev(netdev);
1082
575ced7f 1083 return rv;
1da177e4
LT		 1084}
1085
1086/****************************************************************
1087 * kaweth_disconnect
1088 ****************************************************************/
1089static void kaweth_disconnect(struct usb_interface *intf)
1090{
1091 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1092 struct net_device *netdev;
1093
1da177e4
LT		 1094 usb_set_intfdata(intf, NULL);
1095 if (!kaweth) {
25985edc 1096 dev_warn(&intf->dev, "unregistering non-existent device\n");
1da177e4
LT		 1097 return;
1098 }
1099 netdev = kaweth->net;
1da177e4 1100
49ae25b0 1101 netdev_dbg(kaweth->net, "Unregistering net device\n");
1da177e4
LT		 1102 unregister_netdev(netdev);
1103
1104 usb_free_urb(kaweth->rx_urb);
1105 usb_free_urb(kaweth->tx_urb);
1106 usb_free_urb(kaweth->irq_urb);
1107
997ea58e
DM		 1108 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1109 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1da177e4
LT		 1110
1111 free_netdev(netdev);
1112}
1113
1114
d632eb1b 1115module_usb_driver(kaweth_driver);
Linux 6.x block layer and io_uring tree(s)