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96d8e903 | 1 | /* |
7653ebd5 | 2 | * CAN driver for esd CAN-USB/2 and CAN-USB/Micro |
96d8e903 | 3 | * |
7653ebd5 | 4 | * Copyright (C) 2010-2012 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh |
96d8e903 MF |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published | |
8 | * by the Free Software Foundation; version 2 of the License. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
96d8e903 MF |
19 | #include <linux/signal.h> |
20 | #include <linux/slab.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/usb.h> | |
24 | ||
25 | #include <linux/can.h> | |
26 | #include <linux/can/dev.h> | |
27 | #include <linux/can/error.h> | |
28 | ||
29 | MODULE_AUTHOR("Matthias Fuchs <matthias.fuchs@esd.eu>"); | |
7653ebd5 | 30 | MODULE_DESCRIPTION("CAN driver for esd CAN-USB/2 and CAN-USB/Micro interfaces"); |
96d8e903 MF |
31 | MODULE_LICENSE("GPL v2"); |
32 | ||
33 | /* Define these values to match your devices */ | |
34 | #define USB_ESDGMBH_VENDOR_ID 0x0ab4 | |
35 | #define USB_CANUSB2_PRODUCT_ID 0x0010 | |
7653ebd5 | 36 | #define USB_CANUSBM_PRODUCT_ID 0x0011 |
96d8e903 MF |
37 | |
38 | #define ESD_USB2_CAN_CLOCK 60000000 | |
7653ebd5 | 39 | #define ESD_USBM_CAN_CLOCK 36000000 |
96d8e903 MF |
40 | #define ESD_USB2_MAX_NETS 2 |
41 | ||
42 | /* USB2 commands */ | |
43 | #define CMD_VERSION 1 /* also used for VERSION_REPLY */ | |
44 | #define CMD_CAN_RX 2 /* device to host only */ | |
45 | #define CMD_CAN_TX 3 /* also used for TX_DONE */ | |
46 | #define CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ | |
47 | #define CMD_TS 5 /* also used for TS_REPLY */ | |
48 | #define CMD_IDADD 6 /* also used for IDADD_REPLY */ | |
49 | ||
50 | /* esd CAN message flags - dlc field */ | |
51 | #define ESD_RTR 0x10 | |
52 | ||
53 | /* esd CAN message flags - id field */ | |
54 | #define ESD_EXTID 0x20000000 | |
55 | #define ESD_EVENT 0x40000000 | |
56 | #define ESD_IDMASK 0x1fffffff | |
57 | ||
58 | /* esd CAN event ids used by this driver */ | |
59 | #define ESD_EV_CAN_ERROR_EXT 2 | |
60 | ||
61 | /* baudrate message flags */ | |
62 | #define ESD_USB2_UBR 0x80000000 | |
63 | #define ESD_USB2_LOM 0x40000000 | |
64 | #define ESD_USB2_NO_BAUDRATE 0x7fffffff | |
65 | #define ESD_USB2_TSEG1_MIN 1 | |
66 | #define ESD_USB2_TSEG1_MAX 16 | |
67 | #define ESD_USB2_TSEG1_SHIFT 16 | |
68 | #define ESD_USB2_TSEG2_MIN 1 | |
69 | #define ESD_USB2_TSEG2_MAX 8 | |
70 | #define ESD_USB2_TSEG2_SHIFT 20 | |
71 | #define ESD_USB2_SJW_MAX 4 | |
72 | #define ESD_USB2_SJW_SHIFT 14 | |
7653ebd5 | 73 | #define ESD_USBM_SJW_SHIFT 24 |
96d8e903 MF |
74 | #define ESD_USB2_BRP_MIN 1 |
75 | #define ESD_USB2_BRP_MAX 1024 | |
76 | #define ESD_USB2_BRP_INC 1 | |
77 | #define ESD_USB2_3_SAMPLES 0x00800000 | |
78 | ||
79 | /* esd IDADD message */ | |
80 | #define ESD_ID_ENABLE 0x80 | |
81 | #define ESD_MAX_ID_SEGMENT 64 | |
82 | ||
83 | /* SJA1000 ECC register (emulated by usb2 firmware) */ | |
84 | #define SJA1000_ECC_SEG 0x1F | |
85 | #define SJA1000_ECC_DIR 0x20 | |
86 | #define SJA1000_ECC_ERR 0x06 | |
87 | #define SJA1000_ECC_BIT 0x00 | |
88 | #define SJA1000_ECC_FORM 0x40 | |
89 | #define SJA1000_ECC_STUFF 0x80 | |
90 | #define SJA1000_ECC_MASK 0xc0 | |
91 | ||
92 | /* esd bus state event codes */ | |
93 | #define ESD_BUSSTATE_MASK 0xc0 | |
94 | #define ESD_BUSSTATE_WARN 0x40 | |
95 | #define ESD_BUSSTATE_ERRPASSIVE 0x80 | |
96 | #define ESD_BUSSTATE_BUSOFF 0xc0 | |
97 | ||
98 | #define RX_BUFFER_SIZE 1024 | |
99 | #define MAX_RX_URBS 4 | |
100 | #define MAX_TX_URBS 16 /* must be power of 2 */ | |
101 | ||
102 | struct header_msg { | |
103 | u8 len; /* len is always the total message length in 32bit words */ | |
104 | u8 cmd; | |
105 | u8 rsvd[2]; | |
106 | }; | |
107 | ||
108 | struct version_msg { | |
109 | u8 len; | |
110 | u8 cmd; | |
111 | u8 rsvd; | |
112 | u8 flags; | |
113 | __le32 drv_version; | |
114 | }; | |
115 | ||
116 | struct version_reply_msg { | |
117 | u8 len; | |
118 | u8 cmd; | |
119 | u8 nets; | |
120 | u8 features; | |
121 | __le32 version; | |
122 | u8 name[16]; | |
123 | __le32 rsvd; | |
124 | __le32 ts; | |
125 | }; | |
126 | ||
127 | struct rx_msg { | |
128 | u8 len; | |
129 | u8 cmd; | |
130 | u8 net; | |
131 | u8 dlc; | |
132 | __le32 ts; | |
133 | __le32 id; /* upper 3 bits contain flags */ | |
134 | u8 data[8]; | |
135 | }; | |
136 | ||
137 | struct tx_msg { | |
138 | u8 len; | |
139 | u8 cmd; | |
140 | u8 net; | |
141 | u8 dlc; | |
6d5a7a65 | 142 | u32 hnd; /* opaque handle, not used by device */ |
96d8e903 MF |
143 | __le32 id; /* upper 3 bits contain flags */ |
144 | u8 data[8]; | |
145 | }; | |
146 | ||
147 | struct tx_done_msg { | |
148 | u8 len; | |
149 | u8 cmd; | |
150 | u8 net; | |
151 | u8 status; | |
6d5a7a65 | 152 | u32 hnd; /* opaque handle, not used by device */ |
96d8e903 MF |
153 | __le32 ts; |
154 | }; | |
155 | ||
156 | struct id_filter_msg { | |
157 | u8 len; | |
158 | u8 cmd; | |
159 | u8 net; | |
160 | u8 option; | |
161 | __le32 mask[ESD_MAX_ID_SEGMENT + 1]; | |
162 | }; | |
163 | ||
164 | struct set_baudrate_msg { | |
165 | u8 len; | |
166 | u8 cmd; | |
167 | u8 net; | |
168 | u8 rsvd; | |
169 | __le32 baud; | |
170 | }; | |
171 | ||
172 | /* Main message type used between library and application */ | |
173 | struct __attribute__ ((packed)) esd_usb2_msg { | |
174 | union { | |
175 | struct header_msg hdr; | |
176 | struct version_msg version; | |
177 | struct version_reply_msg version_reply; | |
178 | struct rx_msg rx; | |
179 | struct tx_msg tx; | |
180 | struct tx_done_msg txdone; | |
181 | struct set_baudrate_msg setbaud; | |
182 | struct id_filter_msg filter; | |
183 | } msg; | |
184 | }; | |
185 | ||
186 | static struct usb_device_id esd_usb2_table[] = { | |
187 | {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSB2_PRODUCT_ID)}, | |
7653ebd5 | 188 | {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSBM_PRODUCT_ID)}, |
96d8e903 MF |
189 | {} |
190 | }; | |
191 | MODULE_DEVICE_TABLE(usb, esd_usb2_table); | |
192 | ||
193 | struct esd_usb2_net_priv; | |
194 | ||
195 | struct esd_tx_urb_context { | |
196 | struct esd_usb2_net_priv *priv; | |
197 | u32 echo_index; | |
198 | int dlc; | |
199 | }; | |
200 | ||
201 | struct esd_usb2 { | |
202 | struct usb_device *udev; | |
203 | struct esd_usb2_net_priv *nets[ESD_USB2_MAX_NETS]; | |
204 | ||
205 | struct usb_anchor rx_submitted; | |
206 | ||
207 | int net_count; | |
208 | u32 version; | |
209 | int rxinitdone; | |
210 | }; | |
211 | ||
212 | struct esd_usb2_net_priv { | |
213 | struct can_priv can; /* must be the first member */ | |
214 | ||
215 | atomic_t active_tx_jobs; | |
216 | struct usb_anchor tx_submitted; | |
217 | struct esd_tx_urb_context tx_contexts[MAX_TX_URBS]; | |
218 | ||
96d8e903 MF |
219 | struct esd_usb2 *usb2; |
220 | struct net_device *netdev; | |
221 | int index; | |
222 | u8 old_state; | |
223 | struct can_berr_counter bec; | |
224 | }; | |
225 | ||
226 | static void esd_usb2_rx_event(struct esd_usb2_net_priv *priv, | |
227 | struct esd_usb2_msg *msg) | |
228 | { | |
229 | struct net_device_stats *stats = &priv->netdev->stats; | |
230 | struct can_frame *cf; | |
231 | struct sk_buff *skb; | |
232 | u32 id = le32_to_cpu(msg->msg.rx.id) & ESD_IDMASK; | |
233 | ||
234 | if (id == ESD_EV_CAN_ERROR_EXT) { | |
235 | u8 state = msg->msg.rx.data[0]; | |
236 | u8 ecc = msg->msg.rx.data[1]; | |
237 | u8 txerr = msg->msg.rx.data[2]; | |
238 | u8 rxerr = msg->msg.rx.data[3]; | |
239 | ||
240 | skb = alloc_can_err_skb(priv->netdev, &cf); | |
241 | if (skb == NULL) { | |
242 | stats->rx_dropped++; | |
243 | return; | |
244 | } | |
245 | ||
246 | if (state != priv->old_state) { | |
247 | priv->old_state = state; | |
248 | ||
249 | switch (state & ESD_BUSSTATE_MASK) { | |
250 | case ESD_BUSSTATE_BUSOFF: | |
251 | priv->can.state = CAN_STATE_BUS_OFF; | |
252 | cf->can_id |= CAN_ERR_BUSOFF; | |
be38a6f9 | 253 | priv->can.can_stats.bus_off++; |
96d8e903 MF |
254 | can_bus_off(priv->netdev); |
255 | break; | |
256 | case ESD_BUSSTATE_WARN: | |
257 | priv->can.state = CAN_STATE_ERROR_WARNING; | |
258 | priv->can.can_stats.error_warning++; | |
259 | break; | |
260 | case ESD_BUSSTATE_ERRPASSIVE: | |
261 | priv->can.state = CAN_STATE_ERROR_PASSIVE; | |
262 | priv->can.can_stats.error_passive++; | |
263 | break; | |
264 | default: | |
265 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
266 | break; | |
267 | } | |
268 | } else { | |
269 | priv->can.can_stats.bus_error++; | |
270 | stats->rx_errors++; | |
271 | ||
272 | cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; | |
273 | ||
274 | switch (ecc & SJA1000_ECC_MASK) { | |
275 | case SJA1000_ECC_BIT: | |
276 | cf->data[2] |= CAN_ERR_PROT_BIT; | |
277 | break; | |
278 | case SJA1000_ECC_FORM: | |
279 | cf->data[2] |= CAN_ERR_PROT_FORM; | |
280 | break; | |
281 | case SJA1000_ECC_STUFF: | |
282 | cf->data[2] |= CAN_ERR_PROT_STUFF; | |
283 | break; | |
284 | default: | |
96d8e903 MF |
285 | cf->data[3] = ecc & SJA1000_ECC_SEG; |
286 | break; | |
287 | } | |
288 | ||
25985edc | 289 | /* Error occurred during transmission? */ |
96d8e903 MF |
290 | if (!(ecc & SJA1000_ECC_DIR)) |
291 | cf->data[2] |= CAN_ERR_PROT_TX; | |
292 | ||
293 | if (priv->can.state == CAN_STATE_ERROR_WARNING || | |
294 | priv->can.state == CAN_STATE_ERROR_PASSIVE) { | |
295 | cf->data[1] = (txerr > rxerr) ? | |
296 | CAN_ERR_CRTL_TX_PASSIVE : | |
297 | CAN_ERR_CRTL_RX_PASSIVE; | |
298 | } | |
299 | cf->data[6] = txerr; | |
300 | cf->data[7] = rxerr; | |
301 | } | |
302 | ||
96d8e903 MF |
303 | priv->bec.txerr = txerr; |
304 | priv->bec.rxerr = rxerr; | |
305 | ||
306 | stats->rx_packets++; | |
307 | stats->rx_bytes += cf->can_dlc; | |
296decb6 | 308 | netif_rx(skb); |
96d8e903 MF |
309 | } |
310 | } | |
311 | ||
312 | static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv, | |
313 | struct esd_usb2_msg *msg) | |
314 | { | |
315 | struct net_device_stats *stats = &priv->netdev->stats; | |
316 | struct can_frame *cf; | |
317 | struct sk_buff *skb; | |
318 | int i; | |
319 | u32 id; | |
320 | ||
321 | if (!netif_device_present(priv->netdev)) | |
322 | return; | |
323 | ||
324 | id = le32_to_cpu(msg->msg.rx.id); | |
325 | ||
326 | if (id & ESD_EVENT) { | |
327 | esd_usb2_rx_event(priv, msg); | |
328 | } else { | |
329 | skb = alloc_can_skb(priv->netdev, &cf); | |
330 | if (skb == NULL) { | |
331 | stats->rx_dropped++; | |
332 | return; | |
333 | } | |
334 | ||
335 | cf->can_id = id & ESD_IDMASK; | |
72d92e86 | 336 | cf->can_dlc = get_can_dlc(msg->msg.rx.dlc & ~ESD_RTR); |
96d8e903 MF |
337 | |
338 | if (id & ESD_EXTID) | |
339 | cf->can_id |= CAN_EFF_FLAG; | |
340 | ||
341 | if (msg->msg.rx.dlc & ESD_RTR) { | |
342 | cf->can_id |= CAN_RTR_FLAG; | |
343 | } else { | |
344 | for (i = 0; i < cf->can_dlc; i++) | |
345 | cf->data[i] = msg->msg.rx.data[i]; | |
346 | } | |
347 | ||
96d8e903 MF |
348 | stats->rx_packets++; |
349 | stats->rx_bytes += cf->can_dlc; | |
296decb6 | 350 | netif_rx(skb); |
96d8e903 MF |
351 | } |
352 | ||
353 | return; | |
354 | } | |
355 | ||
356 | static void esd_usb2_tx_done_msg(struct esd_usb2_net_priv *priv, | |
357 | struct esd_usb2_msg *msg) | |
358 | { | |
359 | struct net_device_stats *stats = &priv->netdev->stats; | |
360 | struct net_device *netdev = priv->netdev; | |
361 | struct esd_tx_urb_context *context; | |
362 | ||
363 | if (!netif_device_present(netdev)) | |
364 | return; | |
365 | ||
366 | context = &priv->tx_contexts[msg->msg.txdone.hnd & (MAX_TX_URBS - 1)]; | |
367 | ||
368 | if (!msg->msg.txdone.status) { | |
369 | stats->tx_packets++; | |
370 | stats->tx_bytes += context->dlc; | |
371 | can_get_echo_skb(netdev, context->echo_index); | |
372 | } else { | |
373 | stats->tx_errors++; | |
374 | can_free_echo_skb(netdev, context->echo_index); | |
375 | } | |
376 | ||
377 | /* Release context */ | |
378 | context->echo_index = MAX_TX_URBS; | |
379 | atomic_dec(&priv->active_tx_jobs); | |
380 | ||
381 | netif_wake_queue(netdev); | |
382 | } | |
383 | ||
384 | static void esd_usb2_read_bulk_callback(struct urb *urb) | |
385 | { | |
386 | struct esd_usb2 *dev = urb->context; | |
387 | int retval; | |
388 | int pos = 0; | |
389 | int i; | |
390 | ||
391 | switch (urb->status) { | |
392 | case 0: /* success */ | |
393 | break; | |
394 | ||
395 | case -ENOENT: | |
7a31ced3 MK |
396 | case -EPIPE: |
397 | case -EPROTO: | |
96d8e903 MF |
398 | case -ESHUTDOWN: |
399 | return; | |
400 | ||
401 | default: | |
402 | dev_info(dev->udev->dev.parent, | |
403 | "Rx URB aborted (%d)\n", urb->status); | |
404 | goto resubmit_urb; | |
405 | } | |
406 | ||
407 | while (pos < urb->actual_length) { | |
408 | struct esd_usb2_msg *msg; | |
409 | ||
410 | msg = (struct esd_usb2_msg *)(urb->transfer_buffer + pos); | |
411 | ||
412 | switch (msg->msg.hdr.cmd) { | |
413 | case CMD_CAN_RX: | |
233a26e8 MS |
414 | if (msg->msg.rx.net >= dev->net_count) { |
415 | dev_err(dev->udev->dev.parent, "format error\n"); | |
416 | break; | |
417 | } | |
418 | ||
96d8e903 MF |
419 | esd_usb2_rx_can_msg(dev->nets[msg->msg.rx.net], msg); |
420 | break; | |
421 | ||
422 | case CMD_CAN_TX: | |
233a26e8 MS |
423 | if (msg->msg.txdone.net >= dev->net_count) { |
424 | dev_err(dev->udev->dev.parent, "format error\n"); | |
425 | break; | |
426 | } | |
427 | ||
96d8e903 MF |
428 | esd_usb2_tx_done_msg(dev->nets[msg->msg.txdone.net], |
429 | msg); | |
430 | break; | |
431 | } | |
432 | ||
433 | pos += msg->msg.hdr.len << 2; | |
434 | ||
435 | if (pos > urb->actual_length) { | |
436 | dev_err(dev->udev->dev.parent, "format error\n"); | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | resubmit_urb: | |
442 | usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), | |
443 | urb->transfer_buffer, RX_BUFFER_SIZE, | |
444 | esd_usb2_read_bulk_callback, dev); | |
445 | ||
446 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
447 | if (retval == -ENODEV) { | |
448 | for (i = 0; i < dev->net_count; i++) { | |
449 | if (dev->nets[i]) | |
450 | netif_device_detach(dev->nets[i]->netdev); | |
451 | } | |
452 | } else if (retval) { | |
453 | dev_err(dev->udev->dev.parent, | |
454 | "failed resubmitting read bulk urb: %d\n", retval); | |
455 | } | |
456 | ||
457 | return; | |
458 | } | |
459 | ||
460 | /* | |
461 | * callback for bulk IN urb | |
462 | */ | |
463 | static void esd_usb2_write_bulk_callback(struct urb *urb) | |
464 | { | |
465 | struct esd_tx_urb_context *context = urb->context; | |
466 | struct esd_usb2_net_priv *priv; | |
96d8e903 MF |
467 | struct net_device *netdev; |
468 | size_t size = sizeof(struct esd_usb2_msg); | |
469 | ||
470 | WARN_ON(!context); | |
471 | ||
472 | priv = context->priv; | |
473 | netdev = priv->netdev; | |
96d8e903 MF |
474 | |
475 | /* free up our allocated buffer */ | |
476 | usb_free_coherent(urb->dev, size, | |
477 | urb->transfer_buffer, urb->transfer_dma); | |
478 | ||
479 | if (!netif_device_present(netdev)) | |
480 | return; | |
481 | ||
482 | if (urb->status) | |
aabdfd6a | 483 | netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status); |
96d8e903 | 484 | |
860e9538 | 485 | netif_trans_update(netdev); |
96d8e903 MF |
486 | } |
487 | ||
488 | static ssize_t show_firmware(struct device *d, | |
489 | struct device_attribute *attr, char *buf) | |
490 | { | |
491 | struct usb_interface *intf = to_usb_interface(d); | |
492 | struct esd_usb2 *dev = usb_get_intfdata(intf); | |
493 | ||
494 | return sprintf(buf, "%d.%d.%d\n", | |
495 | (dev->version >> 12) & 0xf, | |
496 | (dev->version >> 8) & 0xf, | |
497 | dev->version & 0xff); | |
498 | } | |
499 | static DEVICE_ATTR(firmware, S_IRUGO, show_firmware, NULL); | |
500 | ||
501 | static ssize_t show_hardware(struct device *d, | |
502 | struct device_attribute *attr, char *buf) | |
503 | { | |
504 | struct usb_interface *intf = to_usb_interface(d); | |
505 | struct esd_usb2 *dev = usb_get_intfdata(intf); | |
506 | ||
507 | return sprintf(buf, "%d.%d.%d\n", | |
508 | (dev->version >> 28) & 0xf, | |
509 | (dev->version >> 24) & 0xf, | |
510 | (dev->version >> 16) & 0xff); | |
511 | } | |
512 | static DEVICE_ATTR(hardware, S_IRUGO, show_hardware, NULL); | |
513 | ||
514 | static ssize_t show_nets(struct device *d, | |
515 | struct device_attribute *attr, char *buf) | |
516 | { | |
517 | struct usb_interface *intf = to_usb_interface(d); | |
518 | struct esd_usb2 *dev = usb_get_intfdata(intf); | |
519 | ||
520 | return sprintf(buf, "%d", dev->net_count); | |
521 | } | |
522 | static DEVICE_ATTR(nets, S_IRUGO, show_nets, NULL); | |
523 | ||
524 | static int esd_usb2_send_msg(struct esd_usb2 *dev, struct esd_usb2_msg *msg) | |
525 | { | |
526 | int actual_length; | |
527 | ||
528 | return usb_bulk_msg(dev->udev, | |
529 | usb_sndbulkpipe(dev->udev, 2), | |
530 | msg, | |
531 | msg->msg.hdr.len << 2, | |
532 | &actual_length, | |
533 | 1000); | |
534 | } | |
535 | ||
536 | static int esd_usb2_wait_msg(struct esd_usb2 *dev, | |
537 | struct esd_usb2_msg *msg) | |
538 | { | |
539 | int actual_length; | |
540 | ||
541 | return usb_bulk_msg(dev->udev, | |
542 | usb_rcvbulkpipe(dev->udev, 1), | |
543 | msg, | |
544 | sizeof(*msg), | |
545 | &actual_length, | |
546 | 1000); | |
547 | } | |
548 | ||
549 | static int esd_usb2_setup_rx_urbs(struct esd_usb2 *dev) | |
550 | { | |
551 | int i, err = 0; | |
552 | ||
553 | if (dev->rxinitdone) | |
554 | return 0; | |
555 | ||
556 | for (i = 0; i < MAX_RX_URBS; i++) { | |
557 | struct urb *urb = NULL; | |
558 | u8 *buf = NULL; | |
559 | ||
560 | /* create a URB, and a buffer for it */ | |
561 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
562 | if (!urb) { | |
96d8e903 MF |
563 | err = -ENOMEM; |
564 | break; | |
565 | } | |
566 | ||
567 | buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, GFP_KERNEL, | |
568 | &urb->transfer_dma); | |
569 | if (!buf) { | |
570 | dev_warn(dev->udev->dev.parent, | |
571 | "No memory left for USB buffer\n"); | |
572 | err = -ENOMEM; | |
573 | goto freeurb; | |
574 | } | |
575 | ||
576 | usb_fill_bulk_urb(urb, dev->udev, | |
577 | usb_rcvbulkpipe(dev->udev, 1), | |
578 | buf, RX_BUFFER_SIZE, | |
579 | esd_usb2_read_bulk_callback, dev); | |
580 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
581 | usb_anchor_urb(urb, &dev->rx_submitted); | |
582 | ||
583 | err = usb_submit_urb(urb, GFP_KERNEL); | |
584 | if (err) { | |
585 | usb_unanchor_urb(urb); | |
586 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, | |
587 | urb->transfer_dma); | |
588 | } | |
589 | ||
590 | freeurb: | |
591 | /* Drop reference, USB core will take care of freeing it */ | |
592 | usb_free_urb(urb); | |
593 | if (err) | |
594 | break; | |
595 | } | |
596 | ||
597 | /* Did we submit any URBs */ | |
598 | if (i == 0) { | |
599 | dev_err(dev->udev->dev.parent, "couldn't setup read URBs\n"); | |
600 | return err; | |
601 | } | |
602 | ||
603 | /* Warn if we've couldn't transmit all the URBs */ | |
604 | if (i < MAX_RX_URBS) { | |
605 | dev_warn(dev->udev->dev.parent, | |
606 | "rx performance may be slow\n"); | |
607 | } | |
608 | ||
609 | dev->rxinitdone = 1; | |
610 | return 0; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Start interface | |
615 | */ | |
616 | static int esd_usb2_start(struct esd_usb2_net_priv *priv) | |
617 | { | |
618 | struct esd_usb2 *dev = priv->usb2; | |
619 | struct net_device *netdev = priv->netdev; | |
fae37f81 | 620 | struct esd_usb2_msg *msg; |
96d8e903 MF |
621 | int err, i; |
622 | ||
fae37f81 OS |
623 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); |
624 | if (!msg) { | |
625 | err = -ENOMEM; | |
626 | goto out; | |
627 | } | |
628 | ||
96d8e903 MF |
629 | /* |
630 | * Enable all IDs | |
631 | * The IDADD message takes up to 64 32 bit bitmasks (2048 bits). | |
632 | * Each bit represents one 11 bit CAN identifier. A set bit | |
633 | * enables reception of the corresponding CAN identifier. A cleared | |
634 | * bit disabled this identifier. An additional bitmask value | |
635 | * following the CAN 2.0A bits is used to enable reception of | |
636 | * extended CAN frames. Only the LSB of this final mask is checked | |
637 | * for the complete 29 bit ID range. The IDADD message also allows | |
638 | * filter configuration for an ID subset. In this case you can add | |
639 | * the number of the starting bitmask (0..64) to the filter.option | |
640 | * field followed by only some bitmasks. | |
641 | */ | |
fae37f81 OS |
642 | msg->msg.hdr.cmd = CMD_IDADD; |
643 | msg->msg.hdr.len = 2 + ESD_MAX_ID_SEGMENT; | |
644 | msg->msg.filter.net = priv->index; | |
645 | msg->msg.filter.option = ESD_ID_ENABLE; /* start with segment 0 */ | |
96d8e903 | 646 | for (i = 0; i < ESD_MAX_ID_SEGMENT; i++) |
fae37f81 | 647 | msg->msg.filter.mask[i] = cpu_to_le32(0xffffffff); |
96d8e903 | 648 | /* enable 29bit extended IDs */ |
fae37f81 | 649 | msg->msg.filter.mask[ESD_MAX_ID_SEGMENT] = cpu_to_le32(0x00000001); |
96d8e903 | 650 | |
fae37f81 | 651 | err = esd_usb2_send_msg(dev, msg); |
96d8e903 | 652 | if (err) |
fae37f81 | 653 | goto out; |
96d8e903 MF |
654 | |
655 | err = esd_usb2_setup_rx_urbs(dev); | |
656 | if (err) | |
fae37f81 | 657 | goto out; |
96d8e903 MF |
658 | |
659 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | |
660 | ||
fae37f81 | 661 | out: |
96d8e903 MF |
662 | if (err == -ENODEV) |
663 | netif_device_detach(netdev); | |
fae37f81 OS |
664 | if (err) |
665 | netdev_err(netdev, "couldn't start device: %d\n", err); | |
96d8e903 | 666 | |
fae37f81 | 667 | kfree(msg); |
96d8e903 MF |
668 | return err; |
669 | } | |
670 | ||
671 | static void unlink_all_urbs(struct esd_usb2 *dev) | |
672 | { | |
673 | struct esd_usb2_net_priv *priv; | |
0b322111 | 674 | int i, j; |
96d8e903 MF |
675 | |
676 | usb_kill_anchored_urbs(&dev->rx_submitted); | |
677 | for (i = 0; i < dev->net_count; i++) { | |
678 | priv = dev->nets[i]; | |
679 | if (priv) { | |
680 | usb_kill_anchored_urbs(&priv->tx_submitted); | |
681 | atomic_set(&priv->active_tx_jobs, 0); | |
682 | ||
0b322111 | 683 | for (j = 0; j < MAX_TX_URBS; j++) |
684 | priv->tx_contexts[j].echo_index = MAX_TX_URBS; | |
96d8e903 MF |
685 | } |
686 | } | |
687 | } | |
688 | ||
689 | static int esd_usb2_open(struct net_device *netdev) | |
690 | { | |
691 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | |
692 | int err; | |
693 | ||
694 | /* common open */ | |
695 | err = open_candev(netdev); | |
696 | if (err) | |
697 | return err; | |
698 | ||
699 | /* finally start device */ | |
700 | err = esd_usb2_start(priv); | |
701 | if (err) { | |
aabdfd6a | 702 | netdev_warn(netdev, "couldn't start device: %d\n", err); |
96d8e903 MF |
703 | close_candev(netdev); |
704 | return err; | |
705 | } | |
706 | ||
96d8e903 MF |
707 | netif_start_queue(netdev); |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static netdev_tx_t esd_usb2_start_xmit(struct sk_buff *skb, | |
713 | struct net_device *netdev) | |
714 | { | |
715 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | |
716 | struct esd_usb2 *dev = priv->usb2; | |
717 | struct esd_tx_urb_context *context = NULL; | |
718 | struct net_device_stats *stats = &netdev->stats; | |
719 | struct can_frame *cf = (struct can_frame *)skb->data; | |
720 | struct esd_usb2_msg *msg; | |
721 | struct urb *urb; | |
722 | u8 *buf; | |
723 | int i, err; | |
724 | int ret = NETDEV_TX_OK; | |
725 | size_t size = sizeof(struct esd_usb2_msg); | |
726 | ||
727 | if (can_dropped_invalid_skb(netdev, skb)) | |
728 | return NETDEV_TX_OK; | |
729 | ||
730 | /* create a URB, and a buffer for it, and copy the data to the URB */ | |
731 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
732 | if (!urb) { | |
96d8e903 MF |
733 | stats->tx_dropped++; |
734 | dev_kfree_skb(skb); | |
735 | goto nourbmem; | |
736 | } | |
737 | ||
738 | buf = usb_alloc_coherent(dev->udev, size, GFP_ATOMIC, | |
739 | &urb->transfer_dma); | |
740 | if (!buf) { | |
aabdfd6a | 741 | netdev_err(netdev, "No memory left for USB buffer\n"); |
96d8e903 MF |
742 | stats->tx_dropped++; |
743 | dev_kfree_skb(skb); | |
744 | goto nobufmem; | |
745 | } | |
746 | ||
747 | msg = (struct esd_usb2_msg *)buf; | |
748 | ||
749 | msg->msg.hdr.len = 3; /* minimal length */ | |
750 | msg->msg.hdr.cmd = CMD_CAN_TX; | |
751 | msg->msg.tx.net = priv->index; | |
752 | msg->msg.tx.dlc = cf->can_dlc; | |
753 | msg->msg.tx.id = cpu_to_le32(cf->can_id & CAN_ERR_MASK); | |
754 | ||
755 | if (cf->can_id & CAN_RTR_FLAG) | |
756 | msg->msg.tx.dlc |= ESD_RTR; | |
757 | ||
758 | if (cf->can_id & CAN_EFF_FLAG) | |
759 | msg->msg.tx.id |= cpu_to_le32(ESD_EXTID); | |
760 | ||
761 | for (i = 0; i < cf->can_dlc; i++) | |
762 | msg->msg.tx.data[i] = cf->data[i]; | |
763 | ||
764 | msg->msg.hdr.len += (cf->can_dlc + 3) >> 2; | |
765 | ||
766 | for (i = 0; i < MAX_TX_URBS; i++) { | |
767 | if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) { | |
768 | context = &priv->tx_contexts[i]; | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
773 | /* | |
774 | * This may never happen. | |
775 | */ | |
776 | if (!context) { | |
aabdfd6a | 777 | netdev_warn(netdev, "couldn't find free context\n"); |
96d8e903 MF |
778 | ret = NETDEV_TX_BUSY; |
779 | goto releasebuf; | |
780 | } | |
781 | ||
782 | context->priv = priv; | |
783 | context->echo_index = i; | |
784 | context->dlc = cf->can_dlc; | |
785 | ||
786 | /* hnd must not be 0 - MSB is stripped in txdone handling */ | |
787 | msg->msg.tx.hnd = 0x80000000 | i; /* returned in TX done message */ | |
788 | ||
789 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), buf, | |
790 | msg->msg.hdr.len << 2, | |
791 | esd_usb2_write_bulk_callback, context); | |
792 | ||
793 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
794 | ||
795 | usb_anchor_urb(urb, &priv->tx_submitted); | |
796 | ||
797 | can_put_echo_skb(skb, netdev, context->echo_index); | |
798 | ||
799 | atomic_inc(&priv->active_tx_jobs); | |
800 | ||
801 | /* Slow down tx path */ | |
802 | if (atomic_read(&priv->active_tx_jobs) >= MAX_TX_URBS) | |
803 | netif_stop_queue(netdev); | |
804 | ||
805 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
806 | if (err) { | |
807 | can_free_echo_skb(netdev, context->echo_index); | |
808 | ||
809 | atomic_dec(&priv->active_tx_jobs); | |
810 | usb_unanchor_urb(urb); | |
811 | ||
812 | stats->tx_dropped++; | |
813 | ||
814 | if (err == -ENODEV) | |
815 | netif_device_detach(netdev); | |
816 | else | |
aabdfd6a | 817 | netdev_warn(netdev, "failed tx_urb %d\n", err); |
96d8e903 MF |
818 | |
819 | goto releasebuf; | |
820 | } | |
821 | ||
860e9538 | 822 | netif_trans_update(netdev); |
96d8e903 MF |
823 | |
824 | /* | |
825 | * Release our reference to this URB, the USB core will eventually free | |
826 | * it entirely. | |
827 | */ | |
828 | usb_free_urb(urb); | |
829 | ||
830 | return NETDEV_TX_OK; | |
831 | ||
832 | releasebuf: | |
833 | usb_free_coherent(dev->udev, size, buf, urb->transfer_dma); | |
834 | ||
835 | nobufmem: | |
836 | usb_free_urb(urb); | |
837 | ||
838 | nourbmem: | |
839 | return ret; | |
840 | } | |
841 | ||
842 | static int esd_usb2_close(struct net_device *netdev) | |
843 | { | |
844 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | |
fae37f81 | 845 | struct esd_usb2_msg *msg; |
96d8e903 MF |
846 | int i; |
847 | ||
fae37f81 OS |
848 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); |
849 | if (!msg) | |
850 | return -ENOMEM; | |
851 | ||
96d8e903 | 852 | /* Disable all IDs (see esd_usb2_start()) */ |
fae37f81 OS |
853 | msg->msg.hdr.cmd = CMD_IDADD; |
854 | msg->msg.hdr.len = 2 + ESD_MAX_ID_SEGMENT; | |
855 | msg->msg.filter.net = priv->index; | |
856 | msg->msg.filter.option = ESD_ID_ENABLE; /* start with segment 0 */ | |
96d8e903 | 857 | for (i = 0; i <= ESD_MAX_ID_SEGMENT; i++) |
fae37f81 OS |
858 | msg->msg.filter.mask[i] = 0; |
859 | if (esd_usb2_send_msg(priv->usb2, msg) < 0) | |
aabdfd6a | 860 | netdev_err(netdev, "sending idadd message failed\n"); |
96d8e903 MF |
861 | |
862 | /* set CAN controller to reset mode */ | |
fae37f81 OS |
863 | msg->msg.hdr.len = 2; |
864 | msg->msg.hdr.cmd = CMD_SETBAUD; | |
865 | msg->msg.setbaud.net = priv->index; | |
866 | msg->msg.setbaud.rsvd = 0; | |
867 | msg->msg.setbaud.baud = cpu_to_le32(ESD_USB2_NO_BAUDRATE); | |
868 | if (esd_usb2_send_msg(priv->usb2, msg) < 0) | |
aabdfd6a | 869 | netdev_err(netdev, "sending setbaud message failed\n"); |
96d8e903 MF |
870 | |
871 | priv->can.state = CAN_STATE_STOPPED; | |
872 | ||
873 | netif_stop_queue(netdev); | |
874 | ||
875 | close_candev(netdev); | |
876 | ||
fae37f81 OS |
877 | kfree(msg); |
878 | ||
96d8e903 MF |
879 | return 0; |
880 | } | |
881 | ||
882 | static const struct net_device_ops esd_usb2_netdev_ops = { | |
883 | .ndo_open = esd_usb2_open, | |
884 | .ndo_stop = esd_usb2_close, | |
885 | .ndo_start_xmit = esd_usb2_start_xmit, | |
c971fa2a | 886 | .ndo_change_mtu = can_change_mtu, |
96d8e903 MF |
887 | }; |
888 | ||
194b9a4c | 889 | static const struct can_bittiming_const esd_usb2_bittiming_const = { |
96d8e903 MF |
890 | .name = "esd_usb2", |
891 | .tseg1_min = ESD_USB2_TSEG1_MIN, | |
892 | .tseg1_max = ESD_USB2_TSEG1_MAX, | |
893 | .tseg2_min = ESD_USB2_TSEG2_MIN, | |
894 | .tseg2_max = ESD_USB2_TSEG2_MAX, | |
895 | .sjw_max = ESD_USB2_SJW_MAX, | |
896 | .brp_min = ESD_USB2_BRP_MIN, | |
897 | .brp_max = ESD_USB2_BRP_MAX, | |
898 | .brp_inc = ESD_USB2_BRP_INC, | |
899 | }; | |
900 | ||
901 | static int esd_usb2_set_bittiming(struct net_device *netdev) | |
902 | { | |
903 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | |
904 | struct can_bittiming *bt = &priv->can.bittiming; | |
fae37f81 OS |
905 | struct esd_usb2_msg *msg; |
906 | int err; | |
96d8e903 | 907 | u32 canbtr; |
7653ebd5 | 908 | int sjw_shift; |
96d8e903 MF |
909 | |
910 | canbtr = ESD_USB2_UBR; | |
a5f8f0e1 MF |
911 | if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) |
912 | canbtr |= ESD_USB2_LOM; | |
913 | ||
96d8e903 | 914 | canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1); |
7653ebd5 MF |
915 | |
916 | if (le16_to_cpu(priv->usb2->udev->descriptor.idProduct) == | |
917 | USB_CANUSBM_PRODUCT_ID) | |
918 | sjw_shift = ESD_USBM_SJW_SHIFT; | |
919 | else | |
920 | sjw_shift = ESD_USB2_SJW_SHIFT; | |
921 | ||
96d8e903 | 922 | canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1)) |
7653ebd5 | 923 | << sjw_shift; |
96d8e903 MF |
924 | canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1) |
925 | & (ESD_USB2_TSEG1_MAX - 1)) | |
926 | << ESD_USB2_TSEG1_SHIFT; | |
927 | canbtr |= ((bt->phase_seg2 - 1) & (ESD_USB2_TSEG2_MAX - 1)) | |
928 | << ESD_USB2_TSEG2_SHIFT; | |
929 | if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) | |
930 | canbtr |= ESD_USB2_3_SAMPLES; | |
931 | ||
fae37f81 OS |
932 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); |
933 | if (!msg) | |
934 | return -ENOMEM; | |
935 | ||
936 | msg->msg.hdr.len = 2; | |
937 | msg->msg.hdr.cmd = CMD_SETBAUD; | |
938 | msg->msg.setbaud.net = priv->index; | |
939 | msg->msg.setbaud.rsvd = 0; | |
940 | msg->msg.setbaud.baud = cpu_to_le32(canbtr); | |
96d8e903 | 941 | |
aabdfd6a | 942 | netdev_info(netdev, "setting BTR=%#x\n", canbtr); |
96d8e903 | 943 | |
fae37f81 OS |
944 | err = esd_usb2_send_msg(priv->usb2, msg); |
945 | ||
946 | kfree(msg); | |
947 | return err; | |
96d8e903 MF |
948 | } |
949 | ||
950 | static int esd_usb2_get_berr_counter(const struct net_device *netdev, | |
951 | struct can_berr_counter *bec) | |
952 | { | |
953 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | |
954 | ||
955 | bec->txerr = priv->bec.txerr; | |
956 | bec->rxerr = priv->bec.rxerr; | |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
961 | static int esd_usb2_set_mode(struct net_device *netdev, enum can_mode mode) | |
962 | { | |
96d8e903 MF |
963 | switch (mode) { |
964 | case CAN_MODE_START: | |
965 | netif_wake_queue(netdev); | |
966 | break; | |
967 | ||
968 | default: | |
969 | return -EOPNOTSUPP; | |
970 | } | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | static int esd_usb2_probe_one_net(struct usb_interface *intf, int index) | |
976 | { | |
977 | struct esd_usb2 *dev = usb_get_intfdata(intf); | |
978 | struct net_device *netdev; | |
979 | struct esd_usb2_net_priv *priv; | |
980 | int err = 0; | |
981 | int i; | |
982 | ||
983 | netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); | |
984 | if (!netdev) { | |
985 | dev_err(&intf->dev, "couldn't alloc candev\n"); | |
986 | err = -ENOMEM; | |
987 | goto done; | |
988 | } | |
989 | ||
990 | priv = netdev_priv(netdev); | |
991 | ||
992 | init_usb_anchor(&priv->tx_submitted); | |
993 | atomic_set(&priv->active_tx_jobs, 0); | |
994 | ||
995 | for (i = 0; i < MAX_TX_URBS; i++) | |
996 | priv->tx_contexts[i].echo_index = MAX_TX_URBS; | |
997 | ||
998 | priv->usb2 = dev; | |
999 | priv->netdev = netdev; | |
1000 | priv->index = index; | |
1001 | ||
1002 | priv->can.state = CAN_STATE_STOPPED; | |
a5f8f0e1 | 1003 | priv->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY; |
7653ebd5 MF |
1004 | |
1005 | if (le16_to_cpu(dev->udev->descriptor.idProduct) == | |
1006 | USB_CANUSBM_PRODUCT_ID) | |
1007 | priv->can.clock.freq = ESD_USBM_CAN_CLOCK; | |
1008 | else { | |
1009 | priv->can.clock.freq = ESD_USB2_CAN_CLOCK; | |
1010 | priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; | |
1011 | } | |
1012 | ||
96d8e903 MF |
1013 | priv->can.bittiming_const = &esd_usb2_bittiming_const; |
1014 | priv->can.do_set_bittiming = esd_usb2_set_bittiming; | |
1015 | priv->can.do_set_mode = esd_usb2_set_mode; | |
1016 | priv->can.do_get_berr_counter = esd_usb2_get_berr_counter; | |
96d8e903 MF |
1017 | |
1018 | netdev->flags |= IFF_ECHO; /* we support local echo */ | |
1019 | ||
1020 | netdev->netdev_ops = &esd_usb2_netdev_ops; | |
1021 | ||
1022 | SET_NETDEV_DEV(netdev, &intf->dev); | |
3e66d013 | 1023 | netdev->dev_id = index; |
96d8e903 MF |
1024 | |
1025 | err = register_candev(netdev); | |
1026 | if (err) { | |
aabdfd6a | 1027 | dev_err(&intf->dev, "couldn't register CAN device: %d\n", err); |
96d8e903 MF |
1028 | free_candev(netdev); |
1029 | err = -ENOMEM; | |
1030 | goto done; | |
1031 | } | |
1032 | ||
1033 | dev->nets[index] = priv; | |
aabdfd6a | 1034 | netdev_info(netdev, "device %s registered\n", netdev->name); |
96d8e903 MF |
1035 | |
1036 | done: | |
1037 | return err; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * probe function for new USB2 devices | |
1042 | * | |
1043 | * check version information and number of available | |
1044 | * CAN interfaces | |
1045 | */ | |
1046 | static int esd_usb2_probe(struct usb_interface *intf, | |
1047 | const struct usb_device_id *id) | |
1048 | { | |
1049 | struct esd_usb2 *dev; | |
fae37f81 | 1050 | struct esd_usb2_msg *msg; |
96d8e903 MF |
1051 | int i, err; |
1052 | ||
1053 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
1054 | if (!dev) { | |
1055 | err = -ENOMEM; | |
1056 | goto done; | |
1057 | } | |
1058 | ||
1059 | dev->udev = interface_to_usbdev(intf); | |
1060 | ||
1061 | init_usb_anchor(&dev->rx_submitted); | |
1062 | ||
1063 | usb_set_intfdata(intf, dev); | |
1064 | ||
fae37f81 OS |
1065 | msg = kmalloc(sizeof(*msg), GFP_KERNEL); |
1066 | if (!msg) { | |
1067 | err = -ENOMEM; | |
1068 | goto free_msg; | |
1069 | } | |
1070 | ||
96d8e903 | 1071 | /* query number of CAN interfaces (nets) */ |
fae37f81 OS |
1072 | msg->msg.hdr.cmd = CMD_VERSION; |
1073 | msg->msg.hdr.len = 2; | |
1074 | msg->msg.version.rsvd = 0; | |
1075 | msg->msg.version.flags = 0; | |
1076 | msg->msg.version.drv_version = 0; | |
96d8e903 | 1077 | |
fae37f81 | 1078 | err = esd_usb2_send_msg(dev, msg); |
96d8e903 MF |
1079 | if (err < 0) { |
1080 | dev_err(&intf->dev, "sending version message failed\n"); | |
fae37f81 | 1081 | goto free_msg; |
96d8e903 MF |
1082 | } |
1083 | ||
fae37f81 | 1084 | err = esd_usb2_wait_msg(dev, msg); |
96d8e903 MF |
1085 | if (err < 0) { |
1086 | dev_err(&intf->dev, "no version message answer\n"); | |
fae37f81 | 1087 | goto free_msg; |
96d8e903 MF |
1088 | } |
1089 | ||
fae37f81 OS |
1090 | dev->net_count = (int)msg->msg.version_reply.nets; |
1091 | dev->version = le32_to_cpu(msg->msg.version_reply.version); | |
96d8e903 MF |
1092 | |
1093 | if (device_create_file(&intf->dev, &dev_attr_firmware)) | |
1094 | dev_err(&intf->dev, | |
1095 | "Couldn't create device file for firmware\n"); | |
1096 | ||
1097 | if (device_create_file(&intf->dev, &dev_attr_hardware)) | |
1098 | dev_err(&intf->dev, | |
1099 | "Couldn't create device file for hardware\n"); | |
1100 | ||
1101 | if (device_create_file(&intf->dev, &dev_attr_nets)) | |
1102 | dev_err(&intf->dev, | |
1103 | "Couldn't create device file for nets\n"); | |
1104 | ||
1105 | /* do per device probing */ | |
1106 | for (i = 0; i < dev->net_count; i++) | |
1107 | esd_usb2_probe_one_net(intf, i); | |
1108 | ||
fae37f81 OS |
1109 | free_msg: |
1110 | kfree(msg); | |
1111 | if (err) | |
1112 | kfree(dev); | |
96d8e903 MF |
1113 | done: |
1114 | return err; | |
1115 | } | |
1116 | ||
1117 | /* | |
1118 | * called by the usb core when the device is removed from the system | |
1119 | */ | |
1120 | static void esd_usb2_disconnect(struct usb_interface *intf) | |
1121 | { | |
1122 | struct esd_usb2 *dev = usb_get_intfdata(intf); | |
1123 | struct net_device *netdev; | |
1124 | int i; | |
1125 | ||
1126 | device_remove_file(&intf->dev, &dev_attr_firmware); | |
1127 | device_remove_file(&intf->dev, &dev_attr_hardware); | |
1128 | device_remove_file(&intf->dev, &dev_attr_nets); | |
1129 | ||
1130 | usb_set_intfdata(intf, NULL); | |
1131 | ||
1132 | if (dev) { | |
1133 | for (i = 0; i < dev->net_count; i++) { | |
1134 | if (dev->nets[i]) { | |
1135 | netdev = dev->nets[i]->netdev; | |
1136 | unregister_netdev(netdev); | |
1137 | free_candev(netdev); | |
1138 | } | |
1139 | } | |
1140 | unlink_all_urbs(dev); | |
efbd50d2 | 1141 | kfree(dev); |
96d8e903 MF |
1142 | } |
1143 | } | |
1144 | ||
1145 | /* usb specific object needed to register this driver with the usb subsystem */ | |
1146 | static struct usb_driver esd_usb2_driver = { | |
1147 | .name = "esd_usb2", | |
1148 | .probe = esd_usb2_probe, | |
1149 | .disconnect = esd_usb2_disconnect, | |
1150 | .id_table = esd_usb2_table, | |
1151 | }; | |
1152 | ||
d632eb1b | 1153 | module_usb_driver(esd_usb2_driver); |