diff options
author | Matthias Fuchs <matthias.fuchs@esd.eu> | 2010-08-02 22:55:23 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-08-03 19:37:58 -0400 |
commit | 96d8e90382dc336b5de401164597edfdc2e8d9f1 (patch) | |
tree | 2976dc09729f46ee68217dda7dd2683950e27362 /drivers/net/can | |
parent | 4565956dc0847985c0403c9ebbf274b6a122e1e2 (diff) |
can: Add driver for esd CAN-USB/2 device
This patch adds a driver for esd's USB high speed
CAN interface. The driver supports devices with
multiple CAN interfaces.
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/can')
-rw-r--r-- | drivers/net/can/usb/Kconfig | 6 | ||||
-rw-r--r-- | drivers/net/can/usb/Makefile | 1 | ||||
-rw-r--r-- | drivers/net/can/usb/esd_usb2.c | 1132 |
3 files changed, 1139 insertions, 0 deletions
diff --git a/drivers/net/can/usb/Kconfig b/drivers/net/can/usb/Kconfig index 97ff6febad63..04525495b15b 100644 --- a/drivers/net/can/usb/Kconfig +++ b/drivers/net/can/usb/Kconfig | |||
@@ -7,4 +7,10 @@ config CAN_EMS_USB | |||
7 | This driver is for the one channel CPC-USB/ARM7 CAN/USB interface | 7 | This driver is for the one channel CPC-USB/ARM7 CAN/USB interface |
8 | from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de). | 8 | from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de). |
9 | 9 | ||
10 | config CAN_ESD_USB2 | ||
11 | tristate "ESD USB/2 CAN/USB interface" | ||
12 | ---help--- | ||
13 | This driver supports the CAN-USB/2 interface | ||
14 | from esd electronic system design gmbh (http://www.esd.eu). | ||
15 | |||
10 | endmenu | 16 | endmenu |
diff --git a/drivers/net/can/usb/Makefile b/drivers/net/can/usb/Makefile index 0afd51d4c7a5..fce3cf11719f 100644 --- a/drivers/net/can/usb/Makefile +++ b/drivers/net/can/usb/Makefile | |||
@@ -3,5 +3,6 @@ | |||
3 | # | 3 | # |
4 | 4 | ||
5 | obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o | 5 | obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o |
6 | obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o | ||
6 | 7 | ||
7 | ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG | 8 | ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG |
diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c new file mode 100644 index 000000000000..05a52754f486 --- /dev/null +++ b/drivers/net/can/usb/esd_usb2.c | |||
@@ -0,0 +1,1132 @@ | |||
1 | /* | ||
2 | * CAN driver for esd CAN-USB/2 | ||
3 | * | ||
4 | * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh | ||
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 | */ | ||
19 | #include <linux/init.h> | ||
20 | #include <linux/signal.h> | ||
21 | #include <linux/slab.h> | ||
22 | #include <linux/module.h> | ||
23 | #include <linux/netdevice.h> | ||
24 | #include <linux/usb.h> | ||
25 | |||
26 | #include <linux/can.h> | ||
27 | #include <linux/can/dev.h> | ||
28 | #include <linux/can/error.h> | ||
29 | |||
30 | MODULE_AUTHOR("Matthias Fuchs <matthias.fuchs@esd.eu>"); | ||
31 | MODULE_DESCRIPTION("CAN driver for esd CAN-USB/2 interfaces"); | ||
32 | MODULE_LICENSE("GPL v2"); | ||
33 | |||
34 | /* Define these values to match your devices */ | ||
35 | #define USB_ESDGMBH_VENDOR_ID 0x0ab4 | ||
36 | #define USB_CANUSB2_PRODUCT_ID 0x0010 | ||
37 | |||
38 | #define ESD_USB2_CAN_CLOCK 60000000 | ||
39 | #define ESD_USB2_MAX_NETS 2 | ||
40 | |||
41 | /* USB2 commands */ | ||
42 | #define CMD_VERSION 1 /* also used for VERSION_REPLY */ | ||
43 | #define CMD_CAN_RX 2 /* device to host only */ | ||
44 | #define CMD_CAN_TX 3 /* also used for TX_DONE */ | ||
45 | #define CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ | ||
46 | #define CMD_TS 5 /* also used for TS_REPLY */ | ||
47 | #define CMD_IDADD 6 /* also used for IDADD_REPLY */ | ||
48 | |||
49 | /* esd CAN message flags - dlc field */ | ||
50 | #define ESD_RTR 0x10 | ||
51 | |||
52 | /* esd CAN message flags - id field */ | ||
53 | #define ESD_EXTID 0x20000000 | ||
54 | #define ESD_EVENT 0x40000000 | ||
55 | #define ESD_IDMASK 0x1fffffff | ||
56 | |||
57 | /* esd CAN event ids used by this driver */ | ||
58 | #define ESD_EV_CAN_ERROR_EXT 2 | ||
59 | |||
60 | /* baudrate message flags */ | ||
61 | #define ESD_USB2_UBR 0x80000000 | ||
62 | #define ESD_USB2_LOM 0x40000000 | ||
63 | #define ESD_USB2_NO_BAUDRATE 0x7fffffff | ||
64 | #define ESD_USB2_TSEG1_MIN 1 | ||
65 | #define ESD_USB2_TSEG1_MAX 16 | ||
66 | #define ESD_USB2_TSEG1_SHIFT 16 | ||
67 | #define ESD_USB2_TSEG2_MIN 1 | ||
68 | #define ESD_USB2_TSEG2_MAX 8 | ||
69 | #define ESD_USB2_TSEG2_SHIFT 20 | ||
70 | #define ESD_USB2_SJW_MAX 4 | ||
71 | #define ESD_USB2_SJW_SHIFT 14 | ||
72 | #define ESD_USB2_BRP_MIN 1 | ||
73 | #define ESD_USB2_BRP_MAX 1024 | ||
74 | #define ESD_USB2_BRP_INC 1 | ||
75 | #define ESD_USB2_3_SAMPLES 0x00800000 | ||
76 | |||
77 | /* esd IDADD message */ | ||
78 | #define ESD_ID_ENABLE 0x80 | ||
79 | #define ESD_MAX_ID_SEGMENT 64 | ||
80 | |||
81 | /* SJA1000 ECC register (emulated by usb2 firmware) */ | ||
82 | #define SJA1000_ECC_SEG 0x1F | ||
83 | #define SJA1000_ECC_DIR 0x20 | ||
84 | #define SJA1000_ECC_ERR 0x06 | ||
85 | #define SJA1000_ECC_BIT 0x00 | ||
86 | #define SJA1000_ECC_FORM 0x40 | ||
87 | #define SJA1000_ECC_STUFF 0x80 | ||
88 | #define SJA1000_ECC_MASK 0xc0 | ||
89 | |||
90 | /* esd bus state event codes */ | ||
91 | #define ESD_BUSSTATE_MASK 0xc0 | ||
92 | #define ESD_BUSSTATE_WARN 0x40 | ||
93 | #define ESD_BUSSTATE_ERRPASSIVE 0x80 | ||
94 | #define ESD_BUSSTATE_BUSOFF 0xc0 | ||
95 | |||
96 | #define RX_BUFFER_SIZE 1024 | ||
97 | #define MAX_RX_URBS 4 | ||
98 | #define MAX_TX_URBS 16 /* must be power of 2 */ | ||
99 | |||
100 | struct header_msg { | ||
101 | u8 len; /* len is always the total message length in 32bit words */ | ||
102 | u8 cmd; | ||
103 | u8 rsvd[2]; | ||
104 | }; | ||
105 | |||
106 | struct version_msg { | ||
107 | u8 len; | ||
108 | u8 cmd; | ||
109 | u8 rsvd; | ||
110 | u8 flags; | ||
111 | __le32 drv_version; | ||
112 | }; | ||
113 | |||
114 | struct version_reply_msg { | ||
115 | u8 len; | ||
116 | u8 cmd; | ||
117 | u8 nets; | ||
118 | u8 features; | ||
119 | __le32 version; | ||
120 | u8 name[16]; | ||
121 | __le32 rsvd; | ||
122 | __le32 ts; | ||
123 | }; | ||
124 | |||
125 | struct rx_msg { | ||
126 | u8 len; | ||
127 | u8 cmd; | ||
128 | u8 net; | ||
129 | u8 dlc; | ||
130 | __le32 ts; | ||
131 | __le32 id; /* upper 3 bits contain flags */ | ||
132 | u8 data[8]; | ||
133 | }; | ||
134 | |||
135 | struct tx_msg { | ||
136 | u8 len; | ||
137 | u8 cmd; | ||
138 | u8 net; | ||
139 | u8 dlc; | ||
140 | __le32 hnd; | ||
141 | __le32 id; /* upper 3 bits contain flags */ | ||
142 | u8 data[8]; | ||
143 | }; | ||
144 | |||
145 | struct tx_done_msg { | ||
146 | u8 len; | ||
147 | u8 cmd; | ||
148 | u8 net; | ||
149 | u8 status; | ||
150 | __le32 hnd; | ||
151 | __le32 ts; | ||
152 | }; | ||
153 | |||
154 | struct id_filter_msg { | ||
155 | u8 len; | ||
156 | u8 cmd; | ||
157 | u8 net; | ||
158 | u8 option; | ||
159 | __le32 mask[ESD_MAX_ID_SEGMENT + 1]; | ||
160 | }; | ||
161 | |||
162 | struct set_baudrate_msg { | ||
163 | u8 len; | ||
164 | u8 cmd; | ||
165 | u8 net; | ||
166 | u8 rsvd; | ||
167 | __le32 baud; | ||
168 | }; | ||
169 | |||
170 | /* Main message type used between library and application */ | ||
171 | struct __attribute__ ((packed)) esd_usb2_msg { | ||
172 | union { | ||
173 | struct header_msg hdr; | ||
174 | struct version_msg version; | ||
175 | struct version_reply_msg version_reply; | ||
176 | struct rx_msg rx; | ||
177 | struct tx_msg tx; | ||
178 | struct tx_done_msg txdone; | ||
179 | struct set_baudrate_msg setbaud; | ||
180 | struct id_filter_msg filter; | ||
181 | } msg; | ||
182 | }; | ||
183 | |||
184 | static struct usb_device_id esd_usb2_table[] = { | ||
185 | {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSB2_PRODUCT_ID)}, | ||
186 | {} | ||
187 | }; | ||
188 | MODULE_DEVICE_TABLE(usb, esd_usb2_table); | ||
189 | |||
190 | struct esd_usb2_net_priv; | ||
191 | |||
192 | struct esd_tx_urb_context { | ||
193 | struct esd_usb2_net_priv *priv; | ||
194 | u32 echo_index; | ||
195 | int dlc; | ||
196 | }; | ||
197 | |||
198 | struct esd_usb2 { | ||
199 | struct usb_device *udev; | ||
200 | struct esd_usb2_net_priv *nets[ESD_USB2_MAX_NETS]; | ||
201 | |||
202 | struct usb_anchor rx_submitted; | ||
203 | |||
204 | int net_count; | ||
205 | u32 version; | ||
206 | int rxinitdone; | ||
207 | }; | ||
208 | |||
209 | struct esd_usb2_net_priv { | ||
210 | struct can_priv can; /* must be the first member */ | ||
211 | |||
212 | atomic_t active_tx_jobs; | ||
213 | struct usb_anchor tx_submitted; | ||
214 | struct esd_tx_urb_context tx_contexts[MAX_TX_URBS]; | ||
215 | |||
216 | int open_time; | ||
217 | struct esd_usb2 *usb2; | ||
218 | struct net_device *netdev; | ||
219 | int index; | ||
220 | u8 old_state; | ||
221 | struct can_berr_counter bec; | ||
222 | }; | ||
223 | |||
224 | static void esd_usb2_rx_event(struct esd_usb2_net_priv *priv, | ||
225 | struct esd_usb2_msg *msg) | ||
226 | { | ||
227 | struct net_device_stats *stats = &priv->netdev->stats; | ||
228 | struct can_frame *cf; | ||
229 | struct sk_buff *skb; | ||
230 | u32 id = le32_to_cpu(msg->msg.rx.id) & ESD_IDMASK; | ||
231 | |||
232 | if (id == ESD_EV_CAN_ERROR_EXT) { | ||
233 | u8 state = msg->msg.rx.data[0]; | ||
234 | u8 ecc = msg->msg.rx.data[1]; | ||
235 | u8 txerr = msg->msg.rx.data[2]; | ||
236 | u8 rxerr = msg->msg.rx.data[3]; | ||
237 | |||
238 | skb = alloc_can_err_skb(priv->netdev, &cf); | ||
239 | if (skb == NULL) { | ||
240 | stats->rx_dropped++; | ||
241 | return; | ||
242 | } | ||
243 | |||
244 | if (state != priv->old_state) { | ||
245 | priv->old_state = state; | ||
246 | |||
247 | switch (state & ESD_BUSSTATE_MASK) { | ||
248 | case ESD_BUSSTATE_BUSOFF: | ||
249 | priv->can.state = CAN_STATE_BUS_OFF; | ||
250 | cf->can_id |= CAN_ERR_BUSOFF; | ||
251 | can_bus_off(priv->netdev); | ||
252 | break; | ||
253 | case ESD_BUSSTATE_WARN: | ||
254 | priv->can.state = CAN_STATE_ERROR_WARNING; | ||
255 | priv->can.can_stats.error_warning++; | ||
256 | break; | ||
257 | case ESD_BUSSTATE_ERRPASSIVE: | ||
258 | priv->can.state = CAN_STATE_ERROR_PASSIVE; | ||
259 | priv->can.can_stats.error_passive++; | ||
260 | break; | ||
261 | default: | ||
262 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | ||
263 | break; | ||
264 | } | ||
265 | } else { | ||
266 | priv->can.can_stats.bus_error++; | ||
267 | stats->rx_errors++; | ||
268 | |||
269 | cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; | ||
270 | |||
271 | switch (ecc & SJA1000_ECC_MASK) { | ||
272 | case SJA1000_ECC_BIT: | ||
273 | cf->data[2] |= CAN_ERR_PROT_BIT; | ||
274 | break; | ||
275 | case SJA1000_ECC_FORM: | ||
276 | cf->data[2] |= CAN_ERR_PROT_FORM; | ||
277 | break; | ||
278 | case SJA1000_ECC_STUFF: | ||
279 | cf->data[2] |= CAN_ERR_PROT_STUFF; | ||
280 | break; | ||
281 | default: | ||
282 | cf->data[2] |= CAN_ERR_PROT_UNSPEC; | ||
283 | cf->data[3] = ecc & SJA1000_ECC_SEG; | ||
284 | break; | ||
285 | } | ||
286 | |||
287 | /* Error occured during transmission? */ | ||
288 | if (!(ecc & SJA1000_ECC_DIR)) | ||
289 | cf->data[2] |= CAN_ERR_PROT_TX; | ||
290 | |||
291 | if (priv->can.state == CAN_STATE_ERROR_WARNING || | ||
292 | priv->can.state == CAN_STATE_ERROR_PASSIVE) { | ||
293 | cf->data[1] = (txerr > rxerr) ? | ||
294 | CAN_ERR_CRTL_TX_PASSIVE : | ||
295 | CAN_ERR_CRTL_RX_PASSIVE; | ||
296 | } | ||
297 | cf->data[6] = txerr; | ||
298 | cf->data[7] = rxerr; | ||
299 | } | ||
300 | |||
301 | netif_rx(skb); | ||
302 | |||
303 | priv->bec.txerr = txerr; | ||
304 | priv->bec.rxerr = rxerr; | ||
305 | |||
306 | stats->rx_packets++; | ||
307 | stats->rx_bytes += cf->can_dlc; | ||
308 | } | ||
309 | } | ||
310 | |||
311 | static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv, | ||
312 | struct esd_usb2_msg *msg) | ||
313 | { | ||
314 | struct net_device_stats *stats = &priv->netdev->stats; | ||
315 | struct can_frame *cf; | ||
316 | struct sk_buff *skb; | ||
317 | int i; | ||
318 | u32 id; | ||
319 | |||
320 | if (!netif_device_present(priv->netdev)) | ||
321 | return; | ||
322 | |||
323 | id = le32_to_cpu(msg->msg.rx.id); | ||
324 | |||
325 | if (id & ESD_EVENT) { | ||
326 | esd_usb2_rx_event(priv, msg); | ||
327 | } else { | ||
328 | skb = alloc_can_skb(priv->netdev, &cf); | ||
329 | if (skb == NULL) { | ||
330 | stats->rx_dropped++; | ||
331 | return; | ||
332 | } | ||
333 | |||
334 | cf->can_id = id & ESD_IDMASK; | ||
335 | cf->can_dlc = get_can_dlc(msg->msg.rx.dlc); | ||
336 | |||
337 | if (id & ESD_EXTID) | ||
338 | cf->can_id |= CAN_EFF_FLAG; | ||
339 | |||
340 | if (msg->msg.rx.dlc & ESD_RTR) { | ||
341 | cf->can_id |= CAN_RTR_FLAG; | ||
342 | } else { | ||
343 | for (i = 0; i < cf->can_dlc; i++) | ||
344 | cf->data[i] = msg->msg.rx.data[i]; | ||
345 | } | ||
346 | |||
347 | netif_rx(skb); | ||
348 | |||
349 | stats->rx_packets++; | ||
350 | stats->rx_bytes += cf->can_dlc; | ||
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: | ||
396 | case -ESHUTDOWN: | ||
397 | return; | ||
398 | |||
399 | default: | ||
400 | dev_info(dev->udev->dev.parent, | ||
401 | "Rx URB aborted (%d)\n", urb->status); | ||
402 | goto resubmit_urb; | ||
403 | } | ||
404 | |||
405 | while (pos < urb->actual_length) { | ||
406 | struct esd_usb2_msg *msg; | ||
407 | |||
408 | msg = (struct esd_usb2_msg *)(urb->transfer_buffer + pos); | ||
409 | |||
410 | switch (msg->msg.hdr.cmd) { | ||
411 | case CMD_CAN_RX: | ||
412 | esd_usb2_rx_can_msg(dev->nets[msg->msg.rx.net], msg); | ||
413 | break; | ||
414 | |||
415 | case CMD_CAN_TX: | ||
416 | esd_usb2_tx_done_msg(dev->nets[msg->msg.txdone.net], | ||
417 | msg); | ||
418 | break; | ||
419 | } | ||
420 | |||
421 | pos += msg->msg.hdr.len << 2; | ||
422 | |||
423 | if (pos > urb->actual_length) { | ||
424 | dev_err(dev->udev->dev.parent, "format error\n"); | ||
425 | break; | ||
426 | } | ||
427 | } | ||
428 | |||
429 | resubmit_urb: | ||
430 | usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), | ||
431 | urb->transfer_buffer, RX_BUFFER_SIZE, | ||
432 | esd_usb2_read_bulk_callback, dev); | ||
433 | |||
434 | retval = usb_submit_urb(urb, GFP_ATOMIC); | ||
435 | if (retval == -ENODEV) { | ||
436 | for (i = 0; i < dev->net_count; i++) { | ||
437 | if (dev->nets[i]) | ||
438 | netif_device_detach(dev->nets[i]->netdev); | ||
439 | } | ||
440 | } else if (retval) { | ||
441 | dev_err(dev->udev->dev.parent, | ||
442 | "failed resubmitting read bulk urb: %d\n", retval); | ||
443 | } | ||
444 | |||
445 | return; | ||
446 | } | ||
447 | |||
448 | /* | ||
449 | * callback for bulk IN urb | ||
450 | */ | ||
451 | static void esd_usb2_write_bulk_callback(struct urb *urb) | ||
452 | { | ||
453 | struct esd_tx_urb_context *context = urb->context; | ||
454 | struct esd_usb2_net_priv *priv; | ||
455 | struct esd_usb2 *dev; | ||
456 | struct net_device *netdev; | ||
457 | size_t size = sizeof(struct esd_usb2_msg); | ||
458 | |||
459 | WARN_ON(!context); | ||
460 | |||
461 | priv = context->priv; | ||
462 | netdev = priv->netdev; | ||
463 | dev = priv->usb2; | ||
464 | |||
465 | /* free up our allocated buffer */ | ||
466 | usb_free_coherent(urb->dev, size, | ||
467 | urb->transfer_buffer, urb->transfer_dma); | ||
468 | |||
469 | if (!netif_device_present(netdev)) | ||
470 | return; | ||
471 | |||
472 | if (urb->status) | ||
473 | dev_info(netdev->dev.parent, "Tx URB aborted (%d)\n", | ||
474 | urb->status); | ||
475 | |||
476 | netdev->trans_start = jiffies; | ||
477 | } | ||
478 | |||
479 | static ssize_t show_firmware(struct device *d, | ||
480 | struct device_attribute *attr, char *buf) | ||
481 | { | ||
482 | struct usb_interface *intf = to_usb_interface(d); | ||
483 | struct esd_usb2 *dev = usb_get_intfdata(intf); | ||
484 | |||
485 | return sprintf(buf, "%d.%d.%d\n", | ||
486 | (dev->version >> 12) & 0xf, | ||
487 | (dev->version >> 8) & 0xf, | ||
488 | dev->version & 0xff); | ||
489 | } | ||
490 | static DEVICE_ATTR(firmware, S_IRUGO, show_firmware, NULL); | ||
491 | |||
492 | static ssize_t show_hardware(struct device *d, | ||
493 | struct device_attribute *attr, char *buf) | ||
494 | { | ||
495 | struct usb_interface *intf = to_usb_interface(d); | ||
496 | struct esd_usb2 *dev = usb_get_intfdata(intf); | ||
497 | |||
498 | return sprintf(buf, "%d.%d.%d\n", | ||
499 | (dev->version >> 28) & 0xf, | ||
500 | (dev->version >> 24) & 0xf, | ||
501 | (dev->version >> 16) & 0xff); | ||
502 | } | ||
503 | static DEVICE_ATTR(hardware, S_IRUGO, show_hardware, NULL); | ||
504 | |||
505 | static ssize_t show_nets(struct device *d, | ||
506 | struct device_attribute *attr, char *buf) | ||
507 | { | ||
508 | struct usb_interface *intf = to_usb_interface(d); | ||
509 | struct esd_usb2 *dev = usb_get_intfdata(intf); | ||
510 | |||
511 | return sprintf(buf, "%d", dev->net_count); | ||
512 | } | ||
513 | static DEVICE_ATTR(nets, S_IRUGO, show_nets, NULL); | ||
514 | |||
515 | static int esd_usb2_send_msg(struct esd_usb2 *dev, struct esd_usb2_msg *msg) | ||
516 | { | ||
517 | int actual_length; | ||
518 | |||
519 | return usb_bulk_msg(dev->udev, | ||
520 | usb_sndbulkpipe(dev->udev, 2), | ||
521 | msg, | ||
522 | msg->msg.hdr.len << 2, | ||
523 | &actual_length, | ||
524 | 1000); | ||
525 | } | ||
526 | |||
527 | static int esd_usb2_wait_msg(struct esd_usb2 *dev, | ||
528 | struct esd_usb2_msg *msg) | ||
529 | { | ||
530 | int actual_length; | ||
531 | |||
532 | return usb_bulk_msg(dev->udev, | ||
533 | usb_rcvbulkpipe(dev->udev, 1), | ||
534 | msg, | ||
535 | sizeof(*msg), | ||
536 | &actual_length, | ||
537 | 1000); | ||
538 | } | ||
539 | |||
540 | static int esd_usb2_setup_rx_urbs(struct esd_usb2 *dev) | ||
541 | { | ||
542 | int i, err = 0; | ||
543 | |||
544 | if (dev->rxinitdone) | ||
545 | return 0; | ||
546 | |||
547 | for (i = 0; i < MAX_RX_URBS; i++) { | ||
548 | struct urb *urb = NULL; | ||
549 | u8 *buf = NULL; | ||
550 | |||
551 | /* create a URB, and a buffer for it */ | ||
552 | urb = usb_alloc_urb(0, GFP_KERNEL); | ||
553 | if (!urb) { | ||
554 | dev_warn(dev->udev->dev.parent, | ||
555 | "No memory left for URBs\n"); | ||
556 | err = -ENOMEM; | ||
557 | break; | ||
558 | } | ||
559 | |||
560 | buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, GFP_KERNEL, | ||
561 | &urb->transfer_dma); | ||
562 | if (!buf) { | ||
563 | dev_warn(dev->udev->dev.parent, | ||
564 | "No memory left for USB buffer\n"); | ||
565 | err = -ENOMEM; | ||
566 | goto freeurb; | ||
567 | } | ||
568 | |||
569 | usb_fill_bulk_urb(urb, dev->udev, | ||
570 | usb_rcvbulkpipe(dev->udev, 1), | ||
571 | buf, RX_BUFFER_SIZE, | ||
572 | esd_usb2_read_bulk_callback, dev); | ||
573 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | ||
574 | usb_anchor_urb(urb, &dev->rx_submitted); | ||
575 | |||
576 | err = usb_submit_urb(urb, GFP_KERNEL); | ||
577 | if (err) { | ||
578 | usb_unanchor_urb(urb); | ||
579 | usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, | ||
580 | urb->transfer_dma); | ||
581 | } | ||
582 | |||
583 | freeurb: | ||
584 | /* Drop reference, USB core will take care of freeing it */ | ||
585 | usb_free_urb(urb); | ||
586 | if (err) | ||
587 | break; | ||
588 | } | ||
589 | |||
590 | /* Did we submit any URBs */ | ||
591 | if (i == 0) { | ||
592 | dev_err(dev->udev->dev.parent, "couldn't setup read URBs\n"); | ||
593 | return err; | ||
594 | } | ||
595 | |||
596 | /* Warn if we've couldn't transmit all the URBs */ | ||
597 | if (i < MAX_RX_URBS) { | ||
598 | dev_warn(dev->udev->dev.parent, | ||
599 | "rx performance may be slow\n"); | ||
600 | } | ||
601 | |||
602 | dev->rxinitdone = 1; | ||
603 | return 0; | ||
604 | } | ||
605 | |||
606 | /* | ||
607 | * Start interface | ||
608 | */ | ||
609 | static int esd_usb2_start(struct esd_usb2_net_priv *priv) | ||
610 | { | ||
611 | struct esd_usb2 *dev = priv->usb2; | ||
612 | struct net_device *netdev = priv->netdev; | ||
613 | struct esd_usb2_msg msg; | ||
614 | int err, i; | ||
615 | |||
616 | /* | ||
617 | * Enable all IDs | ||
618 | * The IDADD message takes up to 64 32 bit bitmasks (2048 bits). | ||
619 | * Each bit represents one 11 bit CAN identifier. A set bit | ||
620 | * enables reception of the corresponding CAN identifier. A cleared | ||
621 | * bit disabled this identifier. An additional bitmask value | ||
622 | * following the CAN 2.0A bits is used to enable reception of | ||
623 | * extended CAN frames. Only the LSB of this final mask is checked | ||
624 | * for the complete 29 bit ID range. The IDADD message also allows | ||
625 | * filter configuration for an ID subset. In this case you can add | ||
626 | * the number of the starting bitmask (0..64) to the filter.option | ||
627 | * field followed by only some bitmasks. | ||
628 | */ | ||
629 | msg.msg.hdr.cmd = CMD_IDADD; | ||
630 | msg.msg.hdr.len = 2 + ESD_MAX_ID_SEGMENT; | ||
631 | msg.msg.filter.net = priv->index; | ||
632 | msg.msg.filter.option = ESD_ID_ENABLE; /* start with segment 0 */ | ||
633 | for (i = 0; i < ESD_MAX_ID_SEGMENT; i++) | ||
634 | msg.msg.filter.mask[i] = cpu_to_le32(0xffffffff); | ||
635 | /* enable 29bit extended IDs */ | ||
636 | msg.msg.filter.mask[ESD_MAX_ID_SEGMENT] = cpu_to_le32(0x00000001); | ||
637 | |||
638 | err = esd_usb2_send_msg(dev, &msg); | ||
639 | if (err) | ||
640 | goto failed; | ||
641 | |||
642 | err = esd_usb2_setup_rx_urbs(dev); | ||
643 | if (err) | ||
644 | goto failed; | ||
645 | |||
646 | priv->can.state = CAN_STATE_ERROR_ACTIVE; | ||
647 | |||
648 | return 0; | ||
649 | |||
650 | failed: | ||
651 | if (err == -ENODEV) | ||
652 | netif_device_detach(netdev); | ||
653 | |||
654 | dev_err(netdev->dev.parent, "couldn't start device: %d\n", err); | ||
655 | |||
656 | return err; | ||
657 | } | ||
658 | |||
659 | static void unlink_all_urbs(struct esd_usb2 *dev) | ||
660 | { | ||
661 | struct esd_usb2_net_priv *priv; | ||
662 | int i; | ||
663 | |||
664 | usb_kill_anchored_urbs(&dev->rx_submitted); | ||
665 | for (i = 0; i < dev->net_count; i++) { | ||
666 | priv = dev->nets[i]; | ||
667 | if (priv) { | ||
668 | usb_kill_anchored_urbs(&priv->tx_submitted); | ||
669 | atomic_set(&priv->active_tx_jobs, 0); | ||
670 | |||
671 | for (i = 0; i < MAX_TX_URBS; i++) | ||
672 | priv->tx_contexts[i].echo_index = MAX_TX_URBS; | ||
673 | } | ||
674 | } | ||
675 | } | ||
676 | |||
677 | static int esd_usb2_open(struct net_device *netdev) | ||
678 | { | ||
679 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
680 | int err; | ||
681 | |||
682 | /* common open */ | ||
683 | err = open_candev(netdev); | ||
684 | if (err) | ||
685 | return err; | ||
686 | |||
687 | /* finally start device */ | ||
688 | err = esd_usb2_start(priv); | ||
689 | if (err) { | ||
690 | dev_warn(netdev->dev.parent, | ||
691 | "couldn't start device: %d\n", err); | ||
692 | close_candev(netdev); | ||
693 | return err; | ||
694 | } | ||
695 | |||
696 | priv->open_time = jiffies; | ||
697 | |||
698 | netif_start_queue(netdev); | ||
699 | |||
700 | return 0; | ||
701 | } | ||
702 | |||
703 | static netdev_tx_t esd_usb2_start_xmit(struct sk_buff *skb, | ||
704 | struct net_device *netdev) | ||
705 | { | ||
706 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
707 | struct esd_usb2 *dev = priv->usb2; | ||
708 | struct esd_tx_urb_context *context = NULL; | ||
709 | struct net_device_stats *stats = &netdev->stats; | ||
710 | struct can_frame *cf = (struct can_frame *)skb->data; | ||
711 | struct esd_usb2_msg *msg; | ||
712 | struct urb *urb; | ||
713 | u8 *buf; | ||
714 | int i, err; | ||
715 | int ret = NETDEV_TX_OK; | ||
716 | size_t size = sizeof(struct esd_usb2_msg); | ||
717 | |||
718 | if (can_dropped_invalid_skb(netdev, skb)) | ||
719 | return NETDEV_TX_OK; | ||
720 | |||
721 | /* create a URB, and a buffer for it, and copy the data to the URB */ | ||
722 | urb = usb_alloc_urb(0, GFP_ATOMIC); | ||
723 | if (!urb) { | ||
724 | dev_err(netdev->dev.parent, "No memory left for URBs\n"); | ||
725 | stats->tx_dropped++; | ||
726 | dev_kfree_skb(skb); | ||
727 | goto nourbmem; | ||
728 | } | ||
729 | |||
730 | buf = usb_alloc_coherent(dev->udev, size, GFP_ATOMIC, | ||
731 | &urb->transfer_dma); | ||
732 | if (!buf) { | ||
733 | dev_err(netdev->dev.parent, "No memory left for USB buffer\n"); | ||
734 | stats->tx_dropped++; | ||
735 | dev_kfree_skb(skb); | ||
736 | goto nobufmem; | ||
737 | } | ||
738 | |||
739 | msg = (struct esd_usb2_msg *)buf; | ||
740 | |||
741 | msg->msg.hdr.len = 3; /* minimal length */ | ||
742 | msg->msg.hdr.cmd = CMD_CAN_TX; | ||
743 | msg->msg.tx.net = priv->index; | ||
744 | msg->msg.tx.dlc = cf->can_dlc; | ||
745 | msg->msg.tx.id = cpu_to_le32(cf->can_id & CAN_ERR_MASK); | ||
746 | |||
747 | if (cf->can_id & CAN_RTR_FLAG) | ||
748 | msg->msg.tx.dlc |= ESD_RTR; | ||
749 | |||
750 | if (cf->can_id & CAN_EFF_FLAG) | ||
751 | msg->msg.tx.id |= cpu_to_le32(ESD_EXTID); | ||
752 | |||
753 | for (i = 0; i < cf->can_dlc; i++) | ||
754 | msg->msg.tx.data[i] = cf->data[i]; | ||
755 | |||
756 | msg->msg.hdr.len += (cf->can_dlc + 3) >> 2; | ||
757 | |||
758 | for (i = 0; i < MAX_TX_URBS; i++) { | ||
759 | if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) { | ||
760 | context = &priv->tx_contexts[i]; | ||
761 | break; | ||
762 | } | ||
763 | } | ||
764 | |||
765 | /* | ||
766 | * This may never happen. | ||
767 | */ | ||
768 | if (!context) { | ||
769 | dev_warn(netdev->dev.parent, "couldn't find free context\n"); | ||
770 | ret = NETDEV_TX_BUSY; | ||
771 | goto releasebuf; | ||
772 | } | ||
773 | |||
774 | context->priv = priv; | ||
775 | context->echo_index = i; | ||
776 | context->dlc = cf->can_dlc; | ||
777 | |||
778 | /* hnd must not be 0 - MSB is stripped in txdone handling */ | ||
779 | msg->msg.tx.hnd = 0x80000000 | i; /* returned in TX done message */ | ||
780 | |||
781 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), buf, | ||
782 | msg->msg.hdr.len << 2, | ||
783 | esd_usb2_write_bulk_callback, context); | ||
784 | |||
785 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | ||
786 | |||
787 | usb_anchor_urb(urb, &priv->tx_submitted); | ||
788 | |||
789 | can_put_echo_skb(skb, netdev, context->echo_index); | ||
790 | |||
791 | atomic_inc(&priv->active_tx_jobs); | ||
792 | |||
793 | /* Slow down tx path */ | ||
794 | if (atomic_read(&priv->active_tx_jobs) >= MAX_TX_URBS) | ||
795 | netif_stop_queue(netdev); | ||
796 | |||
797 | err = usb_submit_urb(urb, GFP_ATOMIC); | ||
798 | if (err) { | ||
799 | can_free_echo_skb(netdev, context->echo_index); | ||
800 | |||
801 | atomic_dec(&priv->active_tx_jobs); | ||
802 | usb_unanchor_urb(urb); | ||
803 | |||
804 | stats->tx_dropped++; | ||
805 | |||
806 | if (err == -ENODEV) | ||
807 | netif_device_detach(netdev); | ||
808 | else | ||
809 | dev_warn(netdev->dev.parent, "failed tx_urb %d\n", err); | ||
810 | |||
811 | goto releasebuf; | ||
812 | } | ||
813 | |||
814 | netdev->trans_start = jiffies; | ||
815 | |||
816 | /* | ||
817 | * Release our reference to this URB, the USB core will eventually free | ||
818 | * it entirely. | ||
819 | */ | ||
820 | usb_free_urb(urb); | ||
821 | |||
822 | return NETDEV_TX_OK; | ||
823 | |||
824 | releasebuf: | ||
825 | usb_free_coherent(dev->udev, size, buf, urb->transfer_dma); | ||
826 | |||
827 | nobufmem: | ||
828 | usb_free_urb(urb); | ||
829 | |||
830 | nourbmem: | ||
831 | return ret; | ||
832 | } | ||
833 | |||
834 | static int esd_usb2_close(struct net_device *netdev) | ||
835 | { | ||
836 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
837 | struct esd_usb2_msg msg; | ||
838 | int i; | ||
839 | |||
840 | /* Disable all IDs (see esd_usb2_start()) */ | ||
841 | msg.msg.hdr.cmd = CMD_IDADD; | ||
842 | msg.msg.hdr.len = 2 + ESD_MAX_ID_SEGMENT; | ||
843 | msg.msg.filter.net = priv->index; | ||
844 | msg.msg.filter.option = ESD_ID_ENABLE; /* start with segment 0 */ | ||
845 | for (i = 0; i <= ESD_MAX_ID_SEGMENT; i++) | ||
846 | msg.msg.filter.mask[i] = 0; | ||
847 | if (esd_usb2_send_msg(priv->usb2, &msg) < 0) | ||
848 | dev_err(netdev->dev.parent, "sending idadd message failed\n"); | ||
849 | |||
850 | /* set CAN controller to reset mode */ | ||
851 | msg.msg.hdr.len = 2; | ||
852 | msg.msg.hdr.cmd = CMD_SETBAUD; | ||
853 | msg.msg.setbaud.net = priv->index; | ||
854 | msg.msg.setbaud.rsvd = 0; | ||
855 | msg.msg.setbaud.baud = cpu_to_le32(ESD_USB2_NO_BAUDRATE); | ||
856 | if (esd_usb2_send_msg(priv->usb2, &msg) < 0) | ||
857 | dev_err(netdev->dev.parent, "sending setbaud message failed\n"); | ||
858 | |||
859 | priv->can.state = CAN_STATE_STOPPED; | ||
860 | |||
861 | netif_stop_queue(netdev); | ||
862 | |||
863 | close_candev(netdev); | ||
864 | |||
865 | priv->open_time = 0; | ||
866 | |||
867 | return 0; | ||
868 | } | ||
869 | |||
870 | static const struct net_device_ops esd_usb2_netdev_ops = { | ||
871 | .ndo_open = esd_usb2_open, | ||
872 | .ndo_stop = esd_usb2_close, | ||
873 | .ndo_start_xmit = esd_usb2_start_xmit, | ||
874 | }; | ||
875 | |||
876 | static struct can_bittiming_const esd_usb2_bittiming_const = { | ||
877 | .name = "esd_usb2", | ||
878 | .tseg1_min = ESD_USB2_TSEG1_MIN, | ||
879 | .tseg1_max = ESD_USB2_TSEG1_MAX, | ||
880 | .tseg2_min = ESD_USB2_TSEG2_MIN, | ||
881 | .tseg2_max = ESD_USB2_TSEG2_MAX, | ||
882 | .sjw_max = ESD_USB2_SJW_MAX, | ||
883 | .brp_min = ESD_USB2_BRP_MIN, | ||
884 | .brp_max = ESD_USB2_BRP_MAX, | ||
885 | .brp_inc = ESD_USB2_BRP_INC, | ||
886 | }; | ||
887 | |||
888 | static int esd_usb2_set_bittiming(struct net_device *netdev) | ||
889 | { | ||
890 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
891 | struct can_bittiming *bt = &priv->can.bittiming; | ||
892 | struct esd_usb2_msg msg; | ||
893 | u32 canbtr; | ||
894 | |||
895 | canbtr = ESD_USB2_UBR; | ||
896 | canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1); | ||
897 | canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1)) | ||
898 | << ESD_USB2_SJW_SHIFT; | ||
899 | canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1) | ||
900 | & (ESD_USB2_TSEG1_MAX - 1)) | ||
901 | << ESD_USB2_TSEG1_SHIFT; | ||
902 | canbtr |= ((bt->phase_seg2 - 1) & (ESD_USB2_TSEG2_MAX - 1)) | ||
903 | << ESD_USB2_TSEG2_SHIFT; | ||
904 | if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) | ||
905 | canbtr |= ESD_USB2_3_SAMPLES; | ||
906 | |||
907 | msg.msg.hdr.len = 2; | ||
908 | msg.msg.hdr.cmd = CMD_SETBAUD; | ||
909 | msg.msg.setbaud.net = priv->index; | ||
910 | msg.msg.setbaud.rsvd = 0; | ||
911 | msg.msg.setbaud.baud = cpu_to_le32(canbtr); | ||
912 | |||
913 | dev_info(netdev->dev.parent, "setting BTR=%#x\n", canbtr); | ||
914 | |||
915 | return esd_usb2_send_msg(priv->usb2, &msg); | ||
916 | } | ||
917 | |||
918 | static int esd_usb2_get_berr_counter(const struct net_device *netdev, | ||
919 | struct can_berr_counter *bec) | ||
920 | { | ||
921 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
922 | |||
923 | bec->txerr = priv->bec.txerr; | ||
924 | bec->rxerr = priv->bec.rxerr; | ||
925 | |||
926 | return 0; | ||
927 | } | ||
928 | |||
929 | static int esd_usb2_set_mode(struct net_device *netdev, enum can_mode mode) | ||
930 | { | ||
931 | struct esd_usb2_net_priv *priv = netdev_priv(netdev); | ||
932 | |||
933 | if (!priv->open_time) | ||
934 | return -EINVAL; | ||
935 | |||
936 | switch (mode) { | ||
937 | case CAN_MODE_START: | ||
938 | netif_wake_queue(netdev); | ||
939 | break; | ||
940 | |||
941 | default: | ||
942 | return -EOPNOTSUPP; | ||
943 | } | ||
944 | |||
945 | return 0; | ||
946 | } | ||
947 | |||
948 | static int esd_usb2_probe_one_net(struct usb_interface *intf, int index) | ||
949 | { | ||
950 | struct esd_usb2 *dev = usb_get_intfdata(intf); | ||
951 | struct net_device *netdev; | ||
952 | struct esd_usb2_net_priv *priv; | ||
953 | int err = 0; | ||
954 | int i; | ||
955 | |||
956 | netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); | ||
957 | if (!netdev) { | ||
958 | dev_err(&intf->dev, "couldn't alloc candev\n"); | ||
959 | err = -ENOMEM; | ||
960 | goto done; | ||
961 | } | ||
962 | |||
963 | priv = netdev_priv(netdev); | ||
964 | |||
965 | init_usb_anchor(&priv->tx_submitted); | ||
966 | atomic_set(&priv->active_tx_jobs, 0); | ||
967 | |||
968 | for (i = 0; i < MAX_TX_URBS; i++) | ||
969 | priv->tx_contexts[i].echo_index = MAX_TX_URBS; | ||
970 | |||
971 | priv->usb2 = dev; | ||
972 | priv->netdev = netdev; | ||
973 | priv->index = index; | ||
974 | |||
975 | priv->can.state = CAN_STATE_STOPPED; | ||
976 | priv->can.clock.freq = ESD_USB2_CAN_CLOCK; | ||
977 | priv->can.bittiming_const = &esd_usb2_bittiming_const; | ||
978 | priv->can.do_set_bittiming = esd_usb2_set_bittiming; | ||
979 | priv->can.do_set_mode = esd_usb2_set_mode; | ||
980 | priv->can.do_get_berr_counter = esd_usb2_get_berr_counter; | ||
981 | priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; | ||
982 | |||
983 | netdev->flags |= IFF_ECHO; /* we support local echo */ | ||
984 | |||
985 | netdev->netdev_ops = &esd_usb2_netdev_ops; | ||
986 | |||
987 | SET_NETDEV_DEV(netdev, &intf->dev); | ||
988 | |||
989 | err = register_candev(netdev); | ||
990 | if (err) { | ||
991 | dev_err(&intf->dev, | ||
992 | "couldn't register CAN device: %d\n", err); | ||
993 | free_candev(netdev); | ||
994 | err = -ENOMEM; | ||
995 | goto done; | ||
996 | } | ||
997 | |||
998 | dev->nets[index] = priv; | ||
999 | dev_info(netdev->dev.parent, "device %s registered\n", netdev->name); | ||
1000 | |||
1001 | done: | ||
1002 | return err; | ||
1003 | } | ||
1004 | |||
1005 | /* | ||
1006 | * probe function for new USB2 devices | ||
1007 | * | ||
1008 | * check version information and number of available | ||
1009 | * CAN interfaces | ||
1010 | */ | ||
1011 | static int esd_usb2_probe(struct usb_interface *intf, | ||
1012 | const struct usb_device_id *id) | ||
1013 | { | ||
1014 | struct esd_usb2 *dev; | ||
1015 | struct esd_usb2_msg msg; | ||
1016 | int i, err; | ||
1017 | |||
1018 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | ||
1019 | if (!dev) { | ||
1020 | err = -ENOMEM; | ||
1021 | goto done; | ||
1022 | } | ||
1023 | |||
1024 | dev->udev = interface_to_usbdev(intf); | ||
1025 | |||
1026 | init_usb_anchor(&dev->rx_submitted); | ||
1027 | |||
1028 | usb_set_intfdata(intf, dev); | ||
1029 | |||
1030 | /* query number of CAN interfaces (nets) */ | ||
1031 | msg.msg.hdr.cmd = CMD_VERSION; | ||
1032 | msg.msg.hdr.len = 2; | ||
1033 | msg.msg.version.rsvd = 0; | ||
1034 | msg.msg.version.flags = 0; | ||
1035 | msg.msg.version.drv_version = 0; | ||
1036 | |||
1037 | err = esd_usb2_send_msg(dev, &msg); | ||
1038 | if (err < 0) { | ||
1039 | dev_err(&intf->dev, "sending version message failed\n"); | ||
1040 | goto free_dev; | ||
1041 | } | ||
1042 | |||
1043 | err = esd_usb2_wait_msg(dev, &msg); | ||
1044 | if (err < 0) { | ||
1045 | dev_err(&intf->dev, "no version message answer\n"); | ||
1046 | goto free_dev; | ||
1047 | } | ||
1048 | |||
1049 | dev->net_count = (int)msg.msg.version_reply.nets; | ||
1050 | dev->version = le32_to_cpu(msg.msg.version_reply.version); | ||
1051 | |||
1052 | if (device_create_file(&intf->dev, &dev_attr_firmware)) | ||
1053 | dev_err(&intf->dev, | ||
1054 | "Couldn't create device file for firmware\n"); | ||
1055 | |||
1056 | if (device_create_file(&intf->dev, &dev_attr_hardware)) | ||
1057 | dev_err(&intf->dev, | ||
1058 | "Couldn't create device file for hardware\n"); | ||
1059 | |||
1060 | if (device_create_file(&intf->dev, &dev_attr_nets)) | ||
1061 | dev_err(&intf->dev, | ||
1062 | "Couldn't create device file for nets\n"); | ||
1063 | |||
1064 | /* do per device probing */ | ||
1065 | for (i = 0; i < dev->net_count; i++) | ||
1066 | esd_usb2_probe_one_net(intf, i); | ||
1067 | |||
1068 | return 0; | ||
1069 | |||
1070 | free_dev: | ||
1071 | kfree(dev); | ||
1072 | done: | ||
1073 | return err; | ||
1074 | } | ||
1075 | |||
1076 | /* | ||
1077 | * called by the usb core when the device is removed from the system | ||
1078 | */ | ||
1079 | static void esd_usb2_disconnect(struct usb_interface *intf) | ||
1080 | { | ||
1081 | struct esd_usb2 *dev = usb_get_intfdata(intf); | ||
1082 | struct net_device *netdev; | ||
1083 | int i; | ||
1084 | |||
1085 | device_remove_file(&intf->dev, &dev_attr_firmware); | ||
1086 | device_remove_file(&intf->dev, &dev_attr_hardware); | ||
1087 | device_remove_file(&intf->dev, &dev_attr_nets); | ||
1088 | |||
1089 | usb_set_intfdata(intf, NULL); | ||
1090 | |||
1091 | if (dev) { | ||
1092 | for (i = 0; i < dev->net_count; i++) { | ||
1093 | if (dev->nets[i]) { | ||
1094 | netdev = dev->nets[i]->netdev; | ||
1095 | unregister_netdev(netdev); | ||
1096 | free_candev(netdev); | ||
1097 | } | ||
1098 | } | ||
1099 | unlink_all_urbs(dev); | ||
1100 | } | ||
1101 | } | ||
1102 | |||
1103 | /* usb specific object needed to register this driver with the usb subsystem */ | ||
1104 | static struct usb_driver esd_usb2_driver = { | ||
1105 | .name = "esd_usb2", | ||
1106 | .probe = esd_usb2_probe, | ||
1107 | .disconnect = esd_usb2_disconnect, | ||
1108 | .id_table = esd_usb2_table, | ||
1109 | }; | ||
1110 | |||
1111 | static int __init esd_usb2_init(void) | ||
1112 | { | ||
1113 | int err; | ||
1114 | |||
1115 | /* register this driver with the USB subsystem */ | ||
1116 | err = usb_register(&esd_usb2_driver); | ||
1117 | |||
1118 | if (err) { | ||
1119 | err("usb_register failed. Error number %d\n", err); | ||
1120 | return err; | ||
1121 | } | ||
1122 | |||
1123 | return 0; | ||
1124 | } | ||
1125 | module_init(esd_usb2_init); | ||
1126 | |||
1127 | static void __exit esd_usb2_exit(void) | ||
1128 | { | ||
1129 | /* deregister this driver with the USB subsystem */ | ||
1130 | usb_deregister(&esd_usb2_driver); | ||
1131 | } | ||
1132 | module_exit(esd_usb2_exit); | ||