2 * CAN driver for PEAK System PCAN-USB Pro adapter
3 * Derived from the PCAN project file driver/src/pcan_usbpro.c
5 * Copyright (C) 2003-2011 PEAK System-Technik GmbH
6 * Copyright (C) 2011-2012 Stephane Grosjean <s.grosjean@peak-system.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published
10 * by the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 #include <linux/netdevice.h>
18 #include <linux/usb.h>
19 #include <linux/module.h>
21 #include <linux/can.h>
22 #include <linux/can/dev.h>
23 #include <linux/can/error.h>
25 #include "pcan_usb_core.h"
26 #include "pcan_usb_pro.h"
28 MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro adapter");
30 /* PCAN-USB Pro Endpoints */
31 #define PCAN_USBPRO_EP_CMDOUT 1
32 #define PCAN_USBPRO_EP_CMDIN (PCAN_USBPRO_EP_CMDOUT | USB_DIR_IN)
33 #define PCAN_USBPRO_EP_MSGOUT_0 2
34 #define PCAN_USBPRO_EP_MSGIN (PCAN_USBPRO_EP_MSGOUT_0 | USB_DIR_IN)
35 #define PCAN_USBPRO_EP_MSGOUT_1 3
36 #define PCAN_USBPRO_EP_UNUSED (PCAN_USBPRO_EP_MSGOUT_1 | USB_DIR_IN)
38 #define PCAN_USBPRO_CHANNEL_COUNT 2
40 /* PCAN-USB Pro adapter internal clock (MHz) */
41 #define PCAN_USBPRO_CRYSTAL_HZ 56000000
43 /* PCAN-USB Pro command timeout (ms.) */
44 #define PCAN_USBPRO_COMMAND_TIMEOUT 1000
46 /* PCAN-USB Pro rx/tx buffers size */
47 #define PCAN_USBPRO_RX_BUFFER_SIZE 1024
48 #define PCAN_USBPRO_TX_BUFFER_SIZE 64
50 #define PCAN_USBPRO_MSG_HEADER_LEN 4
52 /* some commands responses need to be re-submitted */
53 #define PCAN_USBPRO_RSP_SUBMIT_MAX 2
55 #define PCAN_USBPRO_RTR 0x01
56 #define PCAN_USBPRO_EXT 0x02
58 #define PCAN_USBPRO_CMD_BUFFER_SIZE 512
60 /* handle device specific info used by the netdevices */
61 struct pcan_usb_pro_interface
{
62 struct peak_usb_device
*dev
[PCAN_USBPRO_CHANNEL_COUNT
];
63 struct peak_time_ref time_ref
;
68 /* device information */
69 struct pcan_usb_pro_device
{
70 struct peak_usb_device dev
;
71 struct pcan_usb_pro_interface
*usb_if
;
75 /* internal structure used to handle messages sent to bulk urb */
76 struct pcan_usb_pro_msg
{
87 /* records sizes table indexed on message id. (8-bits value) */
88 static u16 pcan_usb_pro_sizeof_rec
[256] = {
89 [PCAN_USBPRO_SETBTR
] = sizeof(struct pcan_usb_pro_btr
),
90 [PCAN_USBPRO_SETBUSACT
] = sizeof(struct pcan_usb_pro_busact
),
91 [PCAN_USBPRO_SETSILENT
] = sizeof(struct pcan_usb_pro_silent
),
92 [PCAN_USBPRO_SETFILTR
] = sizeof(struct pcan_usb_pro_filter
),
93 [PCAN_USBPRO_SETTS
] = sizeof(struct pcan_usb_pro_setts
),
94 [PCAN_USBPRO_GETDEVID
] = sizeof(struct pcan_usb_pro_devid
),
95 [PCAN_USBPRO_SETLED
] = sizeof(struct pcan_usb_pro_setled
),
96 [PCAN_USBPRO_RXMSG8
] = sizeof(struct pcan_usb_pro_rxmsg
),
97 [PCAN_USBPRO_RXMSG4
] = sizeof(struct pcan_usb_pro_rxmsg
) - 4,
98 [PCAN_USBPRO_RXMSG0
] = sizeof(struct pcan_usb_pro_rxmsg
) - 8,
99 [PCAN_USBPRO_RXRTR
] = sizeof(struct pcan_usb_pro_rxmsg
) - 8,
100 [PCAN_USBPRO_RXSTATUS
] = sizeof(struct pcan_usb_pro_rxstatus
),
101 [PCAN_USBPRO_RXTS
] = sizeof(struct pcan_usb_pro_rxts
),
102 [PCAN_USBPRO_TXMSG8
] = sizeof(struct pcan_usb_pro_txmsg
),
103 [PCAN_USBPRO_TXMSG4
] = sizeof(struct pcan_usb_pro_txmsg
) - 4,
104 [PCAN_USBPRO_TXMSG0
] = sizeof(struct pcan_usb_pro_txmsg
) - 8,
108 * initialize PCAN-USB Pro message data structure
110 static u8
*pcan_msg_init(struct pcan_usb_pro_msg
*pm
, void *buffer_addr
,
113 if (buffer_size
< PCAN_USBPRO_MSG_HEADER_LEN
)
116 pm
->u
.rec_buffer
= (u8
*)buffer_addr
;
117 pm
->rec_buffer_size
= pm
->rec_buffer_len
= buffer_size
;
118 pm
->rec_ptr
= pm
->u
.rec_buffer
+ PCAN_USBPRO_MSG_HEADER_LEN
;
123 static u8
*pcan_msg_init_empty(struct pcan_usb_pro_msg
*pm
,
124 void *buffer_addr
, int buffer_size
)
126 u8
*pr
= pcan_msg_init(pm
, buffer_addr
, buffer_size
);
129 pm
->rec_buffer_len
= PCAN_USBPRO_MSG_HEADER_LEN
;
136 * add one record to a message being built
138 static int pcan_msg_add_rec(struct pcan_usb_pro_msg
*pm
, u8 id
, ...)
146 pc
= pm
->rec_ptr
+ 1;
150 case PCAN_USBPRO_TXMSG8
:
152 case PCAN_USBPRO_TXMSG4
:
154 case PCAN_USBPRO_TXMSG0
:
155 *pc
++ = va_arg(ap
, int);
156 *pc
++ = va_arg(ap
, int);
157 *pc
++ = va_arg(ap
, int);
158 *(u32
*)pc
= cpu_to_le32(va_arg(ap
, u32
));
160 memcpy(pc
, va_arg(ap
, int *), i
);
164 case PCAN_USBPRO_SETBTR
:
165 case PCAN_USBPRO_GETDEVID
:
166 *pc
++ = va_arg(ap
, int);
168 *(u32
*)pc
= cpu_to_le32(va_arg(ap
, u32
));
172 case PCAN_USBPRO_SETFILTR
:
173 case PCAN_USBPRO_SETBUSACT
:
174 case PCAN_USBPRO_SETSILENT
:
175 *pc
++ = va_arg(ap
, int);
176 *(u16
*)pc
= cpu_to_le16(va_arg(ap
, int));
180 case PCAN_USBPRO_SETLED
:
181 *pc
++ = va_arg(ap
, int);
182 *(u16
*)pc
= cpu_to_le16(va_arg(ap
, int));
184 *(u32
*)pc
= cpu_to_le32(va_arg(ap
, u32
));
188 case PCAN_USBPRO_SETTS
:
190 *(u16
*)pc
= cpu_to_le16(va_arg(ap
, int));
195 pr_err("%s: %s(): unknown data type %02Xh (%d)\n",
196 PCAN_USB_DRIVER_NAME
, __func__
, id
, id
);
201 len
= pc
- pm
->rec_ptr
;
203 *pm
->u
.rec_cnt
= cpu_to_le32(*pm
->u
.rec_cnt
+1);
207 pm
->rec_buffer_len
+= len
;
216 * send PCAN-USB Pro command synchronously
218 static int pcan_usb_pro_send_cmd(struct peak_usb_device
*dev
,
219 struct pcan_usb_pro_msg
*pum
)
224 /* usb device unregistered? */
225 if (!(dev
->state
& PCAN_USB_STATE_CONNECTED
))
228 err
= usb_bulk_msg(dev
->udev
,
229 usb_sndbulkpipe(dev
->udev
, PCAN_USBPRO_EP_CMDOUT
),
230 pum
->u
.rec_buffer
, pum
->rec_buffer_len
,
231 &actual_length
, PCAN_USBPRO_COMMAND_TIMEOUT
);
233 netdev_err(dev
->netdev
, "sending command failure: %d\n", err
);
239 * wait for PCAN-USB Pro command response
241 static int pcan_usb_pro_wait_rsp(struct peak_usb_device
*dev
,
242 struct pcan_usb_pro_msg
*pum
)
244 u8 req_data_type
, req_channel
;
248 /* usb device unregistered? */
249 if (!(dev
->state
& PCAN_USB_STATE_CONNECTED
))
252 req_data_type
= pum
->u
.rec_buffer
[4];
253 req_channel
= pum
->u
.rec_buffer
[5];
256 for (i
= 0; !err
&& i
< PCAN_USBPRO_RSP_SUBMIT_MAX
; i
++) {
257 struct pcan_usb_pro_msg rsp
;
258 union pcan_usb_pro_rec
*pr
;
263 err
= usb_bulk_msg(dev
->udev
,
264 usb_rcvbulkpipe(dev
->udev
, PCAN_USBPRO_EP_CMDIN
),
265 pum
->u
.rec_buffer
, pum
->rec_buffer_len
,
266 &actual_length
, PCAN_USBPRO_COMMAND_TIMEOUT
);
268 netdev_err(dev
->netdev
, "waiting rsp error %d\n", err
);
272 if (actual_length
== 0)
276 if (actual_length
< PCAN_USBPRO_MSG_HEADER_LEN
) {
277 netdev_err(dev
->netdev
,
278 "got abnormal too small rsp (len=%d)\n",
283 pc
= pcan_msg_init(&rsp
, pum
->u
.rec_buffer
,
286 rec_cnt
= le32_to_cpu(*rsp
.u
.rec_cnt
);
288 /* loop on records stored into message */
289 for (r
= 0; r
< rec_cnt
; r
++) {
290 pr
= (union pcan_usb_pro_rec
*)pc
;
291 rec_len
= pcan_usb_pro_sizeof_rec
[pr
->data_type
];
293 netdev_err(dev
->netdev
,
294 "got unprocessed record in msg\n");
295 pcan_dump_mem("rcvd rsp msg", pum
->u
.rec_buffer
,
300 /* check if response corresponds to request */
301 if (pr
->data_type
!= req_data_type
)
302 netdev_err(dev
->netdev
,
303 "got unwanted rsp %xh: ignored\n",
306 /* check if channel in response corresponds too */
307 else if ((req_channel
!= 0xff) && \
308 (pr
->bus_act
.channel
!= req_channel
))
309 netdev_err(dev
->netdev
,
310 "got rsp %xh but on chan%u: ignored\n",
311 req_data_type
, pr
->bus_act
.channel
);
313 /* got the response */
317 /* otherwise, go on with next record in message */
322 return (i
>= PCAN_USBPRO_RSP_SUBMIT_MAX
) ? -ERANGE
: err
;
325 static int pcan_usb_pro_send_req(struct peak_usb_device
*dev
, int req_id
,
326 int req_value
, void *req_addr
, int req_size
)
332 /* usb device unregistered? */
333 if (!(dev
->state
& PCAN_USB_STATE_CONNECTED
))
336 memset(req_addr
, '\0', req_size
);
338 req_type
= USB_TYPE_VENDOR
| USB_RECIP_OTHER
;
341 case PCAN_USBPRO_REQ_FCT
:
342 p
= usb_sndctrlpipe(dev
->udev
, 0);
346 p
= usb_rcvctrlpipe(dev
->udev
, 0);
347 req_type
|= USB_DIR_IN
;
351 err
= usb_control_msg(dev
->udev
, p
, req_id
, req_type
, req_value
, 0,
352 req_addr
, req_size
, 2 * USB_CTRL_GET_TIMEOUT
);
354 netdev_info(dev
->netdev
,
355 "unable to request usb[type=%d value=%d] err=%d\n",
356 req_id
, req_value
, err
);
363 static int pcan_usb_pro_set_ts(struct peak_usb_device
*dev
, u16 onoff
)
365 struct pcan_usb_pro_msg um
;
367 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
368 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETTS
, onoff
);
370 return pcan_usb_pro_send_cmd(dev
, &um
);
373 static int pcan_usb_pro_set_bitrate(struct peak_usb_device
*dev
, u32 ccbt
)
375 struct pcan_usb_pro_device
*pdev
=
376 container_of(dev
, struct pcan_usb_pro_device
, dev
);
377 struct pcan_usb_pro_msg um
;
379 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
380 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETBTR
, dev
->ctrl_idx
, ccbt
);
382 /* cache the CCBT value to reuse it before next buson */
383 pdev
->cached_ccbt
= ccbt
;
385 return pcan_usb_pro_send_cmd(dev
, &um
);
388 static int pcan_usb_pro_set_bus(struct peak_usb_device
*dev
, u8 onoff
)
390 struct pcan_usb_pro_msg um
;
392 /* if bus=on, be sure the bitrate being set before! */
394 struct pcan_usb_pro_device
*pdev
=
395 container_of(dev
, struct pcan_usb_pro_device
, dev
);
397 pcan_usb_pro_set_bitrate(dev
, pdev
->cached_ccbt
);
400 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
401 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETBUSACT
, dev
->ctrl_idx
, onoff
);
403 return pcan_usb_pro_send_cmd(dev
, &um
);
406 static int pcan_usb_pro_set_silent(struct peak_usb_device
*dev
, u8 onoff
)
408 struct pcan_usb_pro_msg um
;
410 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
411 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETSILENT
, dev
->ctrl_idx
, onoff
);
413 return pcan_usb_pro_send_cmd(dev
, &um
);
416 static int pcan_usb_pro_set_filter(struct peak_usb_device
*dev
, u16 filter_mode
)
418 struct pcan_usb_pro_msg um
;
420 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
421 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETFILTR
, dev
->ctrl_idx
, filter_mode
);
423 return pcan_usb_pro_send_cmd(dev
, &um
);
426 static int pcan_usb_pro_set_led(struct peak_usb_device
*dev
, u8 mode
,
429 struct pcan_usb_pro_msg um
;
431 pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
432 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETLED
, dev
->ctrl_idx
, mode
, timeout
);
434 return pcan_usb_pro_send_cmd(dev
, &um
);
437 static int pcan_usb_pro_get_device_id(struct peak_usb_device
*dev
,
440 struct pcan_usb_pro_devid
*pdn
;
441 struct pcan_usb_pro_msg um
;
445 pc
= pcan_msg_init_empty(&um
, dev
->cmd_buf
, PCAN_USB_MAX_CMD_LEN
);
446 pcan_msg_add_rec(&um
, PCAN_USBPRO_GETDEVID
, dev
->ctrl_idx
);
448 err
= pcan_usb_pro_send_cmd(dev
, &um
);
452 err
= pcan_usb_pro_wait_rsp(dev
, &um
);
456 pdn
= (struct pcan_usb_pro_devid
*)pc
;
458 *device_id
= le32_to_cpu(pdn
->serial_num
);
463 static int pcan_usb_pro_set_bittiming(struct peak_usb_device
*dev
,
464 struct can_bittiming
*bt
)
468 ccbt
= (dev
->can
.ctrlmode
& CAN_CTRLMODE_3_SAMPLES
) ? 0x00800000 : 0;
469 ccbt
|= (bt
->sjw
- 1) << 24;
470 ccbt
|= (bt
->phase_seg2
- 1) << 20;
471 ccbt
|= (bt
->prop_seg
+ bt
->phase_seg1
- 1) << 16; /* = tseg1 */
474 netdev_info(dev
->netdev
, "setting ccbt=0x%08x\n", ccbt
);
476 return pcan_usb_pro_set_bitrate(dev
, ccbt
);
479 static void pcan_usb_pro_restart_complete(struct urb
*urb
)
481 /* can delete usb resources */
482 peak_usb_async_complete(urb
);
484 /* notify candev and netdev */
485 peak_usb_restart_complete(urb
->context
);
489 * handle restart but in asynchronously way
491 static int pcan_usb_pro_restart_async(struct peak_usb_device
*dev
,
492 struct urb
*urb
, u8
*buf
)
494 struct pcan_usb_pro_msg um
;
496 pcan_msg_init_empty(&um
, buf
, PCAN_USB_MAX_CMD_LEN
);
497 pcan_msg_add_rec(&um
, PCAN_USBPRO_SETBUSACT
, dev
->ctrl_idx
, 1);
499 usb_fill_bulk_urb(urb
, dev
->udev
,
500 usb_sndbulkpipe(dev
->udev
, PCAN_USBPRO_EP_CMDOUT
),
501 buf
, PCAN_USB_MAX_CMD_LEN
,
502 pcan_usb_pro_restart_complete
, dev
);
504 return usb_submit_urb(urb
, GFP_ATOMIC
);
507 static void pcan_usb_pro_drv_loaded(struct peak_usb_device
*dev
, int loaded
)
512 buffer
[1] = !!loaded
;
514 pcan_usb_pro_send_req(dev
, PCAN_USBPRO_REQ_FCT
,
515 PCAN_USBPRO_FCT_DRVLD
, buffer
, sizeof(buffer
));
519 struct pcan_usb_pro_interface
*pcan_usb_pro_dev_if(struct peak_usb_device
*dev
)
521 struct pcan_usb_pro_device
*pdev
=
522 container_of(dev
, struct pcan_usb_pro_device
, dev
);
526 static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface
*usb_if
,
527 struct pcan_usb_pro_rxmsg
*rx
)
529 const unsigned int ctrl_idx
= (rx
->len
>> 4) & 0x0f;
530 struct peak_usb_device
*dev
= usb_if
->dev
[ctrl_idx
];
531 struct net_device
*netdev
= dev
->netdev
;
532 struct can_frame
*can_frame
;
536 skb
= alloc_can_skb(netdev
, &can_frame
);
540 can_frame
->can_id
= le32_to_cpu(rx
->id
);
541 can_frame
->can_dlc
= rx
->len
& 0x0f;
543 if (rx
->flags
& PCAN_USBPRO_EXT
)
544 can_frame
->can_id
|= CAN_EFF_FLAG
;
546 if (rx
->flags
& PCAN_USBPRO_RTR
)
547 can_frame
->can_id
|= CAN_RTR_FLAG
;
549 memcpy(can_frame
->data
, rx
->data
, can_frame
->can_dlc
);
551 peak_usb_get_ts_tv(&usb_if
->time_ref
, le32_to_cpu(rx
->ts32
), &tv
);
552 skb
->tstamp
= timeval_to_ktime(tv
);
555 netdev
->stats
.rx_packets
++;
556 netdev
->stats
.rx_bytes
+= can_frame
->can_dlc
;
561 static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface
*usb_if
,
562 struct pcan_usb_pro_rxstatus
*er
)
564 const u32 raw_status
= le32_to_cpu(er
->status
);
565 const unsigned int ctrl_idx
= (er
->channel
>> 4) & 0x0f;
566 struct peak_usb_device
*dev
= usb_if
->dev
[ctrl_idx
];
567 struct net_device
*netdev
= dev
->netdev
;
568 struct can_frame
*can_frame
;
569 enum can_state new_state
= CAN_STATE_ERROR_ACTIVE
;
574 /* nothing should be sent while in BUS_OFF state */
575 if (dev
->can
.state
== CAN_STATE_BUS_OFF
)
579 /* no error bit (back to active state) */
580 dev
->can
.state
= CAN_STATE_ERROR_ACTIVE
;
584 if (raw_status
& (PCAN_USBPRO_STATUS_OVERRUN
|
585 PCAN_USBPRO_STATUS_QOVERRUN
)) {
586 /* trick to bypass next comparison and process other errors */
587 new_state
= CAN_STATE_MAX
;
590 if (raw_status
& PCAN_USBPRO_STATUS_BUS
) {
591 new_state
= CAN_STATE_BUS_OFF
;
592 } else if (raw_status
& PCAN_USBPRO_STATUS_ERROR
) {
593 u32 rx_err_cnt
= (le32_to_cpu(er
->err_frm
) & 0x00ff0000) >> 16;
594 u32 tx_err_cnt
= (le32_to_cpu(er
->err_frm
) & 0xff000000) >> 24;
596 if (rx_err_cnt
> 127)
597 err_mask
|= CAN_ERR_CRTL_RX_PASSIVE
;
598 else if (rx_err_cnt
> 96)
599 err_mask
|= CAN_ERR_CRTL_RX_WARNING
;
601 if (tx_err_cnt
> 127)
602 err_mask
|= CAN_ERR_CRTL_TX_PASSIVE
;
603 else if (tx_err_cnt
> 96)
604 err_mask
|= CAN_ERR_CRTL_TX_WARNING
;
606 if (err_mask
& (CAN_ERR_CRTL_RX_WARNING
|
607 CAN_ERR_CRTL_TX_WARNING
))
608 new_state
= CAN_STATE_ERROR_WARNING
;
609 else if (err_mask
& (CAN_ERR_CRTL_RX_PASSIVE
|
610 CAN_ERR_CRTL_TX_PASSIVE
))
611 new_state
= CAN_STATE_ERROR_PASSIVE
;
614 /* donot post any error if current state didn't change */
615 if (dev
->can
.state
== new_state
)
618 /* allocate an skb to store the error frame */
619 skb
= alloc_can_err_skb(netdev
, &can_frame
);
624 case CAN_STATE_BUS_OFF
:
625 can_frame
->can_id
|= CAN_ERR_BUSOFF
;
629 case CAN_STATE_ERROR_PASSIVE
:
630 can_frame
->can_id
|= CAN_ERR_CRTL
;
631 can_frame
->data
[1] |= err_mask
;
632 dev
->can
.can_stats
.error_passive
++;
635 case CAN_STATE_ERROR_WARNING
:
636 can_frame
->can_id
|= CAN_ERR_CRTL
;
637 can_frame
->data
[1] |= err_mask
;
638 dev
->can
.can_stats
.error_warning
++;
641 case CAN_STATE_ERROR_ACTIVE
:
645 /* CAN_STATE_MAX (trick to handle other errors) */
646 if (raw_status
& PCAN_USBPRO_STATUS_OVERRUN
) {
647 can_frame
->can_id
|= CAN_ERR_PROT
;
648 can_frame
->data
[2] |= CAN_ERR_PROT_OVERLOAD
;
649 netdev
->stats
.rx_over_errors
++;
650 netdev
->stats
.rx_errors
++;
653 if (raw_status
& PCAN_USBPRO_STATUS_QOVERRUN
) {
654 can_frame
->can_id
|= CAN_ERR_CRTL
;
655 can_frame
->data
[1] |= CAN_ERR_CRTL_RX_OVERFLOW
;
656 netdev
->stats
.rx_over_errors
++;
657 netdev
->stats
.rx_errors
++;
660 new_state
= CAN_STATE_ERROR_ACTIVE
;
664 dev
->can
.state
= new_state
;
666 peak_usb_get_ts_tv(&usb_if
->time_ref
, le32_to_cpu(er
->ts32
), &tv
);
667 skb
->tstamp
= timeval_to_ktime(tv
);
669 netdev
->stats
.rx_packets
++;
670 netdev
->stats
.rx_bytes
+= can_frame
->can_dlc
;
675 static void pcan_usb_pro_handle_ts(struct pcan_usb_pro_interface
*usb_if
,
676 struct pcan_usb_pro_rxts
*ts
)
678 /* should wait until clock is stabilized */
679 if (usb_if
->cm_ignore_count
> 0)
680 usb_if
->cm_ignore_count
--;
682 peak_usb_set_ts_now(&usb_if
->time_ref
,
683 le32_to_cpu(ts
->ts64
[1]));
687 * callback for bulk IN urb
689 static int pcan_usb_pro_decode_buf(struct peak_usb_device
*dev
, struct urb
*urb
)
691 struct pcan_usb_pro_interface
*usb_if
= pcan_usb_pro_dev_if(dev
);
692 struct net_device
*netdev
= dev
->netdev
;
693 struct pcan_usb_pro_msg usb_msg
;
694 u8
*rec_ptr
, *msg_end
;
698 rec_ptr
= pcan_msg_init(&usb_msg
, urb
->transfer_buffer
,
701 netdev_err(netdev
, "bad msg hdr len %d\n", urb
->actual_length
);
705 /* loop reading all the records from the incoming message */
706 msg_end
= urb
->transfer_buffer
+ urb
->actual_length
;
707 rec_cnt
= le16_to_cpu(*usb_msg
.u
.rec_cnt_rd
);
708 for (; rec_cnt
> 0; rec_cnt
--) {
709 union pcan_usb_pro_rec
*pr
= (union pcan_usb_pro_rec
*)rec_ptr
;
710 u16 sizeof_rec
= pcan_usb_pro_sizeof_rec
[pr
->data_type
];
714 "got unsupported rec in usb msg:\n");
719 /* check if the record goes out of current packet */
720 if (rec_ptr
+ sizeof_rec
> msg_end
) {
722 "got frag rec: should inc usb rx buf size\n");
727 switch (pr
->data_type
) {
728 case PCAN_USBPRO_RXMSG8
:
729 case PCAN_USBPRO_RXMSG4
:
730 case PCAN_USBPRO_RXMSG0
:
731 case PCAN_USBPRO_RXRTR
:
732 err
= pcan_usb_pro_handle_canmsg(usb_if
, &pr
->rx_msg
);
737 case PCAN_USBPRO_RXSTATUS
:
738 err
= pcan_usb_pro_handle_error(usb_if
, &pr
->rx_status
);
743 case PCAN_USBPRO_RXTS
:
744 pcan_usb_pro_handle_ts(usb_if
, &pr
->rx_ts
);
749 "unhandled rec type 0x%02x (%d): ignored\n",
750 pr
->data_type
, pr
->data_type
);
754 rec_ptr
+= sizeof_rec
;
759 pcan_dump_mem("received msg",
760 urb
->transfer_buffer
, urb
->actual_length
);
765 static int pcan_usb_pro_encode_msg(struct peak_usb_device
*dev
,
766 struct sk_buff
*skb
, u8
*obuf
, size_t *size
)
768 struct can_frame
*cf
= (struct can_frame
*)skb
->data
;
769 u8 data_type
, len
, flags
;
770 struct pcan_usb_pro_msg usb_msg
;
772 pcan_msg_init_empty(&usb_msg
, obuf
, *size
);
774 if ((cf
->can_id
& CAN_RTR_FLAG
) || (cf
->can_dlc
== 0))
775 data_type
= PCAN_USBPRO_TXMSG0
;
776 else if (cf
->can_dlc
<= 4)
777 data_type
= PCAN_USBPRO_TXMSG4
;
779 data_type
= PCAN_USBPRO_TXMSG8
;
781 len
= (dev
->ctrl_idx
<< 4) | (cf
->can_dlc
& 0x0f);
784 if (cf
->can_id
& CAN_EFF_FLAG
)
786 if (cf
->can_id
& CAN_RTR_FLAG
)
789 pcan_msg_add_rec(&usb_msg
, data_type
, 0, flags
, len
, cf
->can_id
,
792 *size
= usb_msg
.rec_buffer_len
;
797 static int pcan_usb_pro_start(struct peak_usb_device
*dev
)
799 struct pcan_usb_pro_device
*pdev
=
800 container_of(dev
, struct pcan_usb_pro_device
, dev
);
803 err
= pcan_usb_pro_set_silent(dev
,
804 dev
->can
.ctrlmode
& CAN_CTRLMODE_LISTENONLY
);
808 /* filter mode: 0-> All OFF; 1->bypass */
809 err
= pcan_usb_pro_set_filter(dev
, 1);
813 /* opening first device: */
814 if (pdev
->usb_if
->dev_opened_count
== 0) {
816 peak_usb_init_time_ref(&pdev
->usb_if
->time_ref
, &pcan_usb_pro
);
818 /* ask device to send ts messages */
819 err
= pcan_usb_pro_set_ts(dev
, 1);
822 pdev
->usb_if
->dev_opened_count
++;
829 * (last chance before set bus off)
831 static int pcan_usb_pro_stop(struct peak_usb_device
*dev
)
833 struct pcan_usb_pro_device
*pdev
=
834 container_of(dev
, struct pcan_usb_pro_device
, dev
);
836 /* turn off ts msgs for that interface if no other dev opened */
837 if (pdev
->usb_if
->dev_opened_count
== 1)
838 pcan_usb_pro_set_ts(dev
, 0);
840 pdev
->usb_if
->dev_opened_count
--;
846 * called when probing to initialize a device object.
848 static int pcan_usb_pro_init(struct peak_usb_device
*dev
)
850 struct pcan_usb_pro_interface
*usb_if
;
851 struct pcan_usb_pro_device
*pdev
=
852 container_of(dev
, struct pcan_usb_pro_device
, dev
);
854 /* do this for 1st channel only */
855 if (!dev
->prev_siblings
) {
856 struct pcan_usb_pro_fwinfo fi
;
857 struct pcan_usb_pro_blinfo bi
;
860 /* allocate netdevices common structure attached to first one */
861 usb_if
= kzalloc(sizeof(struct pcan_usb_pro_interface
),
866 /* number of ts msgs to ignore before taking one into account */
867 usb_if
->cm_ignore_count
= 5;
870 * explicit use of dev_xxx() instead of netdev_xxx() here:
871 * information displayed are related to the device itself, not
872 * to the canx netdevices.
874 err
= pcan_usb_pro_send_req(dev
, PCAN_USBPRO_REQ_INFO
,
879 dev_err(dev
->netdev
->dev
.parent
,
880 "unable to read %s firmware info (err %d)\n",
881 pcan_usb_pro
.name
, err
);
885 err
= pcan_usb_pro_send_req(dev
, PCAN_USBPRO_REQ_INFO
,
890 dev_err(dev
->netdev
->dev
.parent
,
891 "unable to read %s bootloader info (err %d)\n",
892 pcan_usb_pro
.name
, err
);
896 dev_info(dev
->netdev
->dev
.parent
,
897 "PEAK-System %s hwrev %u serial %08X.%08X (%u channels)\n",
899 bi
.hw_rev
, bi
.serial_num_hi
, bi
.serial_num_lo
,
900 pcan_usb_pro
.ctrl_count
);
902 /* tell the device the can driver is running */
903 pcan_usb_pro_drv_loaded(dev
, 1);
905 usb_if
= pcan_usb_pro_dev_if(dev
->prev_siblings
);
908 pdev
->usb_if
= usb_if
;
909 usb_if
->dev
[dev
->ctrl_idx
] = dev
;
911 /* set LED in default state (end of init phase) */
912 pcan_usb_pro_set_led(dev
, 0, 1);
917 static void pcan_usb_pro_exit(struct peak_usb_device
*dev
)
919 struct pcan_usb_pro_device
*pdev
=
920 container_of(dev
, struct pcan_usb_pro_device
, dev
);
923 * when rmmod called before unplug and if down, should reset things
926 if (dev
->can
.state
!= CAN_STATE_STOPPED
) {
927 /* set bus off on the corresponding channel */
928 pcan_usb_pro_set_bus(dev
, 0);
931 /* if channel #0 (only) */
932 if (dev
->ctrl_idx
== 0) {
933 /* turn off calibration message if any device were opened */
934 if (pdev
->usb_if
->dev_opened_count
> 0)
935 pcan_usb_pro_set_ts(dev
, 0);
937 /* tell the PCAN-USB Pro device the driver is being unloaded */
938 pcan_usb_pro_drv_loaded(dev
, 0);
943 * called when PCAN-USB Pro adapter is unplugged
945 static void pcan_usb_pro_free(struct peak_usb_device
*dev
)
947 /* last device: can free pcan_usb_pro_interface object now */
948 if (!dev
->prev_siblings
&& !dev
->next_siblings
)
949 kfree(pcan_usb_pro_dev_if(dev
));
953 * probe function for new PCAN-USB Pro usb interface
955 static int pcan_usb_pro_probe(struct usb_interface
*intf
)
957 struct usb_host_interface
*if_desc
;
960 if_desc
= intf
->altsetting
;
962 /* check interface endpoint addresses */
963 for (i
= 0; i
< if_desc
->desc
.bNumEndpoints
; i
++) {
964 struct usb_endpoint_descriptor
*ep
= &if_desc
->endpoint
[i
].desc
;
967 * below is the list of valid ep addreses. Any other ep address
968 * is considered as not-CAN interface address => no dev created
970 switch (ep
->bEndpointAddress
) {
971 case PCAN_USBPRO_EP_CMDOUT
:
972 case PCAN_USBPRO_EP_CMDIN
:
973 case PCAN_USBPRO_EP_MSGOUT_0
:
974 case PCAN_USBPRO_EP_MSGOUT_1
:
975 case PCAN_USBPRO_EP_MSGIN
:
976 case PCAN_USBPRO_EP_UNUSED
:
987 * describe the PCAN-USB Pro adapter
989 struct peak_usb_adapter pcan_usb_pro
= {
990 .name
= "PCAN-USB Pro",
991 .device_id
= PCAN_USBPRO_PRODUCT_ID
,
992 .ctrl_count
= PCAN_USBPRO_CHANNEL_COUNT
,
994 .freq
= PCAN_USBPRO_CRYSTAL_HZ
,
997 .name
= "pcan_usb_pro",
1008 /* size of device private data */
1009 .sizeof_dev_private
= sizeof(struct pcan_usb_pro_device
),
1011 /* timestamps usage */
1013 .ts_period
= 1000000, /* calibration period in ts. */
1014 .us_per_ts_scale
= 1, /* us = (ts * scale) >> shift */
1015 .us_per_ts_shift
= 0,
1017 /* give here messages in/out endpoints */
1018 .ep_msg_in
= PCAN_USBPRO_EP_MSGIN
,
1019 .ep_msg_out
= {PCAN_USBPRO_EP_MSGOUT_0
, PCAN_USBPRO_EP_MSGOUT_1
},
1021 /* size of rx/tx usb buffers */
1022 .rx_buffer_size
= PCAN_USBPRO_RX_BUFFER_SIZE
,
1023 .tx_buffer_size
= PCAN_USBPRO_TX_BUFFER_SIZE
,
1025 /* device callbacks */
1026 .intf_probe
= pcan_usb_pro_probe
,
1027 .dev_init
= pcan_usb_pro_init
,
1028 .dev_exit
= pcan_usb_pro_exit
,
1029 .dev_free
= pcan_usb_pro_free
,
1030 .dev_set_bus
= pcan_usb_pro_set_bus
,
1031 .dev_set_bittiming
= pcan_usb_pro_set_bittiming
,
1032 .dev_get_device_id
= pcan_usb_pro_get_device_id
,
1033 .dev_decode_buf
= pcan_usb_pro_decode_buf
,
1034 .dev_encode_msg
= pcan_usb_pro_encode_msg
,
1035 .dev_start
= pcan_usb_pro_start
,
1036 .dev_stop
= pcan_usb_pro_stop
,
1037 .dev_restart_async
= pcan_usb_pro_restart_async
,