2 * Linux CAN-bus device driver.
3 * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
4 * Changed for PeliCan mode SJA1000 by Tomasz Motylewski (BFAD GmbH)
6 * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
7 * email:pisa@cmp.felk.cvut.cz
8 * This software is released under the GPL-License.
9 * Version lincan-0.3 17 Jun 2004
12 #include "../include/can.h"
13 #include "../include/can_sysdep.h"
14 #include "../include/main.h"
15 #include "../include/sja1000p.h"
18 * sja1000p_enable_configuration - enable chip configuration mode
19 * @chip: pointer to chip state structure
21 int sja1000p_enable_configuration(struct canchip_t *chip)
24 enum sja1000_PeliCAN_MOD flags;
26 can_disable_irq(chip->chip_irq);
28 flags=can_read_reg(chip,SJAMOD);
30 while ((!(flags & sjaMOD_RM)) && (i<=10)) {
31 can_write_reg(chip, sjaMOD_RM, SJAMOD);
32 // TODO: configurable sjaMOD_AFM (32/16 bit acceptance filter)
33 // config sjaMOD_LOM (listen only)
36 flags=can_read_reg(chip, SJAMOD);
39 CANMSG("Reset error\n");
40 can_enable_irq(chip->chip_irq);
48 * sja1000p_disable_configuration - disable chip configuration mode
49 * @chip: pointer to chip state structure
51 int sja1000p_disable_configuration(struct canchip_t *chip)
54 enum sja1000_PeliCAN_MOD flags;
56 flags=can_read_reg(chip,SJAMOD);
58 while ( (flags & sjaMOD_RM) && (i<=50) ) {
59 // could be as long as 11*128 bit times after buss-off
60 can_write_reg(chip, 0, SJAMOD);
61 // TODO: configurable sjaMOD_AFM (32/16 bit acceptance filter)
62 // config sjaMOD_LOM (listen only)
65 flags=can_read_reg(chip, SJAMOD);
68 CANMSG("Error leaving reset status\n");
72 can_enable_irq(chip->chip_irq);
78 * sja1000p_chip_config: - can chip configuration
79 * @chip: pointer to chip state structure
81 * This function configures chip and prepares it for message
82 * transmission and reception. The function resets chip,
83 * resets mask for acceptance of all messages by call to
84 * sja1000p_extended_mask() function and then
85 * computes and sets baudrate with use of function sja1000p_baud_rate().
86 * Return Value: negative value reports error.
87 * File: src/sja1000p.c
89 int sja1000p_chip_config(struct canchip_t *chip)
94 if (sja1000p_enable_configuration(chip))
97 /* Set mode, clock out, comparator */
98 can_write_reg(chip,sjaCDR_PELICAN|chip->sja_cdr_reg,SJACDR);
99 /* Set driver output configuration */
100 can_write_reg(chip,chip->sja_ocr_reg,SJAOCR);
102 /* Simple check for chip presence */
103 for (i=0, n=0x5a; i<8; i++, n+=0xf) {
104 can_write_reg(chip,n,SJAACR0+i);
106 for (i=0, n=0x5a; i<8; i++, n+=0xf) {
107 r = n^can_read_reg(chip,SJAACR0+i);
109 CANMSG("sja1000p_chip_config: chip connection broken,"
110 " readback differ 0x%02x\n", r);
116 if (sja1000p_extended_mask(chip,0x00000000, 0xffffffff))
120 chip->baudrate=1000000;
121 if (sja1000p_baud_rate(chip,chip->baudrate,chip->clock,0,75,0))
124 /* Enable hardware interrupts */
125 can_write_reg(chip, sjaENABLE_INTERRUPTS, SJAIER);
127 sja1000p_disable_configuration(chip);
133 * sja1000p_extended_mask: - setup of extended mask for message filtering
134 * @chip: pointer to chip state structure
135 * @code: can message acceptance code
136 * @mask: can message acceptance mask
138 * Return Value: negative value reports error.
139 * File: src/sja1000p.c
141 int sja1000p_extended_mask(struct canchip_t *chip, unsigned long code, unsigned long mask)
145 if (sja1000p_enable_configuration(chip))
148 // LSB to +3, MSB to +0
149 for(i=SJA_PeliCAN_AC_LEN; --i>=0;) {
150 can_write_reg(chip,code&0xff,SJAACR0+i);
151 can_write_reg(chip,mask&0xff,SJAAMR0+i);
156 DEBUGMSG("Setting acceptance code to 0x%lx\n",(unsigned long)code);
157 DEBUGMSG("Setting acceptance mask to 0x%lx\n",(unsigned long)mask);
159 sja1000p_disable_configuration(chip);
165 * sja1000p_baud_rate: - set communication parameters.
166 * @chip: pointer to chip state structure
167 * @rate: baud rate in Hz
168 * @clock: frequency of sja1000 clock in Hz (ISA osc is 14318000)
169 * @sjw: synchronization jump width (0-3) prescaled clock cycles
170 * @sampl_pt: sample point in % (0-100) sets (TSEG1+1)/(TSEG1+TSEG2+2) ratio
171 * @flags: fields %BTR1_SAM, %OCMODE, %OCPOL, %OCTP, %OCTN, %CLK_OFF, %CBP
173 * Return Value: negative value reports error.
174 * File: src/sja1000p.c
176 int sja1000p_baud_rate(struct canchip_t *chip, int rate, int clock, int sjw,
177 int sampl_pt, int flags)
179 int best_error = 1000000000, error;
180 int best_tseg=0, best_brp=0, best_rate=0, brp=0;
181 int tseg=0, tseg1=0, tseg2=0;
183 if (sja1000p_enable_configuration(chip))
188 /* tseg even = round down, odd = round up */
189 for (tseg=(0+0+2)*2; tseg<=(sjaMAX_TSEG2+sjaMAX_TSEG1+2)*2+1; tseg++) {
190 brp = clock/((1+tseg/2)*rate)+tseg%2;
191 if (brp == 0 || brp > 64)
193 error = rate - clock/(brp*(1+tseg/2));
196 if (error <= best_error) {
200 best_rate = clock/(brp*(1+tseg/2));
203 if (best_error && (rate/best_error < 10)) {
204 CANMSG("baud rate %d is not possible with %d Hz clock\n",
206 CANMSG("%d bps. brp=%d, best_tseg=%d, tseg1=%d, tseg2=%d\n",
207 best_rate, best_brp, best_tseg, tseg1, tseg2);
210 tseg2 = best_tseg-(sampl_pt*(best_tseg+1))/100;
213 if (tseg2 > sjaMAX_TSEG2)
214 tseg2 = sjaMAX_TSEG2;
215 tseg1 = best_tseg-tseg2-2;
216 if (tseg1>sjaMAX_TSEG1) {
217 tseg1 = sjaMAX_TSEG1;
218 tseg2 = best_tseg-tseg1-2;
221 DEBUGMSG("Setting %d bps.\n", best_rate);
222 DEBUGMSG("brp=%d, best_tseg=%d, tseg1=%d, tseg2=%d, sampl_pt=%d\n",
223 best_brp, best_tseg, tseg1, tseg2,
224 (100*(best_tseg-tseg2)/(best_tseg+1)));
227 can_write_reg(chip, sjw<<6 | best_brp, SJABTR0);
228 can_write_reg(chip, ((flags & BTR1_SAM) != 0)<<7 | (tseg2<<4)
231 sja1000p_disable_configuration(chip);
237 * sja1000p_read: - reads and distributes one or more received messages
238 * @chip: pointer to chip state structure
239 * @obj: pinter to CAN message queue information
241 * File: src/sja1000p.c
243 void sja1000p_read(struct canchip_t *chip, struct msgobj_t *obj) {
244 int i, flags, len, datastart;
246 flags = can_read_reg(chip,SJAFRM);
247 if(flags&sjaFRM_FF) {
249 (can_read_reg(chip,SJAID0)<<21) +
250 (can_read_reg(chip,SJAID1)<<13) +
251 (can_read_reg(chip,SJAID2)<<5) +
252 (can_read_reg(chip,SJAID3)>>3);
256 (can_read_reg(chip,SJAID0)<<3) +
257 (can_read_reg(chip,SJAID1)>>5);
261 ((flags & sjaFRM_RTR) ? MSG_RTR : 0) |
262 ((flags & sjaFRM_FF) ? MSG_EXT : 0);
263 len = flags & sjaFRM_DLC_M;
264 obj->rx_msg.length = len;
265 if(len > CAN_MSG_LENGTH) len = CAN_MSG_LENGTH;
266 for(i=0; i< len; i++) {
267 obj->rx_msg.data[i]=can_read_reg(chip,datastart+i);
270 /* fill CAN message timestamp */
271 can_filltimestamp(&obj->rx_msg.timestamp);
273 canque_filter_msg2edges(obj->qends, &obj->rx_msg);
275 can_write_reg(chip, sjaCMR_RRB, SJACMR);
277 } while (can_read_reg(chip, SJASR) & sjaSR_RBS);
281 * sja1000p_pre_read_config: - prepares message object for message reception
282 * @chip: pointer to chip state structure
283 * @obj: pointer to message object state structure
285 * Return Value: negative value reports error.
286 * Positive value indicates immediate reception of message.
287 * File: src/sja1000p.c
289 int sja1000p_pre_read_config(struct canchip_t *chip, struct msgobj_t *obj)
292 status=can_read_reg(chip,SJASR);
294 if(status & sjaSR_BS) {
295 /* Try to recover from error condition */
296 DEBUGMSG("sja1000p_pre_read_config bus-off recover 0x%x\n",status);
297 sja1000p_enable_configuration(chip);
298 can_write_reg(chip, 0, SJARXERR);
299 can_write_reg(chip, 0, SJATXERR1);
300 can_read_reg(chip, SJAECC);
301 sja1000p_disable_configuration(chip);
304 if (!(status&sjaSR_RBS)) {
308 can_write_reg(chip, sjaDISABLE_INTERRUPTS, SJAIER); //disable interrupts for a moment
309 sja1000p_read(chip, obj);
310 can_write_reg(chip, sjaENABLE_INTERRUPTS, SJAIER); //enable interrupts
314 #define MAX_TRANSMIT_WAIT_LOOPS 10
316 * sja1000p_pre_write_config: - prepares message object for message transmission
317 * @chip: pointer to chip state structure
318 * @obj: pointer to message object state structure
319 * @msg: pointer to CAN message
321 * This function prepares selected message object for future initiation
322 * of message transmission by sja1000p_send_msg() function.
323 * The CAN message data and message ID are transfered from @msg slot
324 * into chip buffer in this function.
325 * Return Value: negative value reports error.
326 * File: src/sja1000p.c
328 int sja1000p_pre_write_config(struct canchip_t *chip, struct msgobj_t *obj,
329 struct canmsg_t *msg)
336 /* Wait until Transmit Buffer Status is released */
337 while ( !((status=can_read_reg(chip, SJASR)) & sjaSR_TBS) &&
338 i++<MAX_TRANSMIT_WAIT_LOOPS) {
342 if(status & sjaSR_BS) {
343 /* Try to recover from error condition */
344 DEBUGMSG("sja1000p_pre_write_config bus-off recover 0x%x\n",status);
345 sja1000p_enable_configuration(chip);
346 can_write_reg(chip, 0, SJARXERR);
347 can_write_reg(chip, 0, SJATXERR1);
348 can_read_reg(chip, SJAECC);
349 sja1000p_disable_configuration(chip);
351 if (!(can_read_reg(chip, SJASR) & sjaSR_TBS)) {
352 CANMSG("Transmit timed out, cancelling\n");
353 // here we should check if there is no write/select waiting for this
354 // transmit. If so, set error ret and wake up.
355 // CHECKME: if we do not disable sjaIER_TIE (TX IRQ) here we get interrupt
357 can_write_reg(chip, sjaCMR_AT, SJACMR);
359 while ( !(can_read_reg(chip, SJASR) & sjaSR_TBS) &&
360 i++<MAX_TRANSMIT_WAIT_LOOPS) {
363 if (!(can_read_reg(chip, SJASR) & sjaSR_TBS)) {
364 CANMSG("Could not cancel, please reset\n");
369 if(len > CAN_MSG_LENGTH) len = CAN_MSG_LENGTH;
370 /* len &= sjaFRM_DLC_M; ensured by above condition already */
371 can_write_reg(chip, ((msg->flags&MSG_EXT)?sjaFRM_FF:0) |
372 ((msg->flags & MSG_RTR) ? sjaFRM_RTR : 0) | len, SJAFRM);
373 if(msg->flags&MSG_EXT) {
375 can_write_reg(chip, id & 0xff, SJAID3);
377 can_write_reg(chip, id & 0xff, SJAID2);
379 can_write_reg(chip, id & 0xff, SJAID1);
381 can_write_reg(chip, id, SJAID0);
382 for(i=0; i < len; i++) {
383 can_write_reg(chip, msg->data[i], SJADATE+i);
387 can_write_reg(chip, (id >> 8) & 0xff, SJAID0);
388 can_write_reg(chip, id & 0xff, SJAID1);
389 for(i=0; i < len; i++) {
390 can_write_reg(chip, msg->data[i], SJADATS+i);
397 * sja1000p_send_msg: - initiate message transmission
398 * @chip: pointer to chip state structure
399 * @obj: pointer to message object state structure
400 * @msg: pointer to CAN message
402 * This function is called after sja1000p_pre_write_config() function,
403 * which prepares data in chip buffer.
404 * Return Value: negative value reports error.
405 * File: src/sja1000p.c
407 int sja1000p_send_msg(struct canchip_t *chip, struct msgobj_t *obj,
408 struct canmsg_t *msg)
410 can_write_reg(chip, sjaCMR_TR, SJACMR);
416 * sja1000p_check_tx_stat: - checks state of transmission engine
417 * @chip: pointer to chip state structure
419 * Return Value: negative value reports error.
420 * Positive return value indicates transmission under way status.
421 * Zero value indicates finishing of all issued transmission requests.
422 * File: src/sja1000p.c
424 int sja1000p_check_tx_stat(struct canchip_t *chip)
426 if (can_read_reg(chip,SJASR) & sjaSR_TCS)
433 * sja1000p_set_btregs: - configures bitrate registers
434 * @chip: pointer to chip state structure
435 * @btr0: bitrate register 0
436 * @btr1: bitrate register 1
438 * Return Value: negative value reports error.
439 * File: src/sja1000p.c
441 int sja1000p_set_btregs(struct canchip_t *chip, unsigned short btr0,
444 if (sja1000p_enable_configuration(chip))
447 can_write_reg(chip, btr0, SJABTR0);
448 can_write_reg(chip, btr1, SJABTR1);
450 sja1000p_disable_configuration(chip);
456 * sja1000p_start_chip: - starts chip message processing
457 * @chip: pointer to chip state structure
459 * Return Value: negative value reports error.
460 * File: src/sja1000p.c
462 int sja1000p_start_chip(struct canchip_t *chip)
464 enum sja1000_PeliCAN_MOD flags;
466 flags = can_read_reg(chip, SJAMOD) & (sjaMOD_LOM|sjaMOD_STM|sjaMOD_AFM|sjaMOD_SM);
467 can_write_reg(chip, flags, SJAMOD);
473 * sja1000p_stop_chip: - stops chip message processing
474 * @chip: pointer to chip state structure
476 * Return Value: negative value reports error.
477 * File: src/sja1000p.c
479 int sja1000p_stop_chip(struct canchip_t *chip)
481 enum sja1000_PeliCAN_MOD flags;
483 flags = can_read_reg(chip, SJAMOD) & (sjaMOD_LOM|sjaMOD_STM|sjaMOD_AFM|sjaMOD_SM);
484 can_write_reg(chip, flags|sjaMOD_RM, SJAMOD);
491 * sja1000p_remote_request: - configures message object and asks for RTR message
492 * @chip: pointer to chip state structure
493 * @obj: pointer to message object structure
495 * Return Value: negative value reports error.
496 * File: src/sja1000p.c
498 int sja1000p_remote_request(struct canchip_t *chip, struct msgobj_t *obj)
500 CANMSG("sja1000p_remote_request not implemented\n");
505 * sja1000p_standard_mask: - setup of mask for message filtering
506 * @chip: pointer to chip state structure
507 * @code: can message acceptance code
508 * @mask: can message acceptance mask
510 * Return Value: negative value reports error.
511 * File: src/sja1000p.c
513 int sja1000p_standard_mask(struct canchip_t *chip, unsigned short code,
516 CANMSG("sja1000p_standard_mask not implemented\n");
521 * sja1000p_clear_objects: - clears state of all message object residing in chip
522 * @chip: pointer to chip state structure
524 * Return Value: negative value reports error.
525 * File: src/sja1000p.c
527 int sja1000p_clear_objects(struct canchip_t *chip)
529 CANMSG("sja1000p_clear_objects not implemented\n");
534 * sja1000p_config_irqs: - tunes chip hardware interrupt delivery
535 * @chip: pointer to chip state structure
536 * @irqs: requested chip IRQ configuration
538 * Return Value: negative value reports error.
539 * File: src/sja1000p.c
541 int sja1000p_config_irqs(struct canchip_t *chip, short irqs)
543 CANMSG("sja1000p_config_irqs not implemented\n");
548 * sja1000p_irq_write_handler: - part of ISR code responsible for transmit events
549 * @chip: pointer to chip state structure
550 * @obj: pointer to attached queue description
552 * The main purpose of this function is to read message from attached queues
553 * and transfer message contents into CAN controller chip.
554 * This subroutine is called by
555 * sja1000p_irq_write_handler() for transmit events.
556 * File: src/sja1000p.c
558 void sja1000p_irq_write_handler(struct canchip_t *chip, struct msgobj_t *obj)
563 /* Do local transmitted message distribution if enabled */
565 /* fill CAN message timestamp */
566 can_filltimestamp(&obj->tx_slot->msg.timestamp);
568 obj->tx_slot->msg.flags |= MSG_LOCAL;
569 canque_filter_msg2edges(obj->qends, &obj->tx_slot->msg);
571 /* Free transmitted slot */
572 canque_free_outslot(obj->qends, obj->tx_qedge, obj->tx_slot);
576 cmd=canque_test_outslot(obj->qends, &obj->tx_qedge, &obj->tx_slot);
580 if (chip->chipspecops->pre_write_config(chip, obj, &obj->tx_slot->msg)) {
582 canque_notify_inends(obj->tx_qedge, CANQUEUE_NOTIFY_ERRTX_PREP);
583 canque_free_outslot(obj->qends, obj->tx_qedge, obj->tx_slot);
587 if (chip->chipspecops->send_msg(chip, obj, &obj->tx_slot->msg)) {
589 canque_notify_inends(obj->tx_qedge, CANQUEUE_NOTIFY_ERRTX_SEND);
590 canque_free_outslot(obj->qends, obj->tx_qedge, obj->tx_slot);
600 * sja1000p_irq_handler: - interrupt service routine
601 * @irq: interrupt vector number, this value is system specific
602 * @chip: pointer to chip state structure
604 * Interrupt handler is activated when state of CAN controller chip changes,
605 * there is message to be read or there is more space for new messages or
606 * error occurs. The receive events results in reading of the message from
607 * CAN controller chip and distribution of message through attached
609 * File: src/sja1000p.c
611 int sja1000p_irq_handler(int irq, struct canchip_t *chip)
613 int irq_register, status, error_code;
614 struct msgobj_t *obj=chip->msgobj[0];
615 int loop_cnt=CHIP_MAX_IRQLOOP;
617 irq_register=can_read_reg(chip,SJAIR);
618 // DEBUGMSG("sja1000_irq_handler: SJAIR:%02x\n",irq_register);
619 // DEBUGMSG("sja1000_irq_handler: SJASR:%02x\n",
620 // can_read_reg(chip,SJASR));
622 if ((irq_register & (sjaIR_BEI|sjaIR_EPI|sjaIR_DOI|sjaIR_EI|sjaIR_TI|sjaIR_RI)) == 0)
623 return CANCHIP_IRQ_NONE;
625 if(!(chip->flags&CHIP_CONFIGURED)) {
626 CANMSG("sja1000p_irq_handler: called for non-configured device, irq_register 0x%02x\n", irq_register);
627 return CANCHIP_IRQ_NONE;
633 CANMSG("sja1000p_irq_handler IRQ %d stuck\n",irq);
634 return CANCHIP_IRQ_STUCK;
637 if ((irq_register & sjaIR_RI) != 0) {
638 DEBUGMSG("sja1000_irq_handler: RI\n");
639 sja1000p_read(chip,obj);
642 if ((irq_register & sjaIR_TI) != 0) {
643 DEBUGMSG("sja1000_irq_handler: TI\n");
645 can_msgobj_set_fl(obj,TX_REQUEST);
646 while(!can_msgobj_test_and_set_fl(obj,TX_LOCK)){
647 can_msgobj_clear_fl(obj,TX_REQUEST);
649 if (can_read_reg(chip, SJASR) & sjaSR_TBS)
650 sja1000p_irq_write_handler(chip, obj);
652 can_msgobj_clear_fl(obj,TX_LOCK);
653 if(!can_msgobj_test_fl(obj,TX_REQUEST)) break;
654 DEBUGMSG("TX looping in sja1000_irq_handler\n");
657 if ((irq_register & (sjaIR_EI|sjaIR_BEI|sjaIR_EPI|sjaIR_DOI)) != 0) {
658 // Some error happened
659 status=can_read_reg(chip,SJASR);
660 error_code=can_read_reg(chip,SJAECC);
661 CANMSG("Error: status register: 0x%x irq_register: 0x%02x error: 0x%02x\n",
662 status, irq_register, error_code);
663 // FIXME: chip should be brought to usable state. Transmission cancelled if in progress.
664 // Reset flag set to 0 if chip is already off the bus. Full state report
667 if(error_code == 0xd9) {
669 /* no such device or address - no ACK received */
671 if(obj->tx_retry_cnt++>MAX_RETR) {
672 can_write_reg(chip, sjaCMR_AT, SJACMR); // cancel any transmition
673 obj->tx_retry_cnt = 0;
675 if(status&sjaSR_BS) {
676 CANMSG("bus-off, resetting sja1000p\n");
677 can_write_reg(chip, 0, SJAMOD);
681 canque_notify_inends(obj->tx_qedge, CANQUEUE_NOTIFY_ERRTX_BUS);
682 /*canque_free_outslot(obj->qends, obj->tx_qedge, obj->tx_slot);
690 irq_register=can_read_reg(chip,SJAIR);
692 } while(irq_register & (sjaIR_BEI|sjaIR_EPI|sjaIR_DOI|sjaIR_EI|sjaIR_TI|sjaIR_RI));
694 return CANCHIP_IRQ_HANDLED;
698 * sja1000p_wakeup_tx: - wakeups TX processing
699 * @chip: pointer to chip state structure
700 * @obj: pointer to message object structure
702 * Function is responsible for initiating message transmition.
703 * It is responsible for clearing of object TX_REQUEST flag
705 * Return Value: negative value reports error.
706 * File: src/sja1000p.c
708 int sja1000p_wakeup_tx(struct canchip_t *chip, struct msgobj_t *obj)
711 can_preempt_disable();
713 can_msgobj_set_fl(obj,TX_REQUEST);
714 while(!can_msgobj_test_and_set_fl(obj,TX_LOCK)){
715 can_msgobj_clear_fl(obj,TX_REQUEST);
717 if (can_read_reg(chip, SJASR) & sjaSR_TBS){
719 sja1000p_irq_write_handler(chip, obj);
722 can_msgobj_clear_fl(obj,TX_LOCK);
723 if(!can_msgobj_test_fl(obj,TX_REQUEST)) break;
724 DEBUGMSG("TX looping in sja1000p_wakeup_tx\n");
727 can_preempt_enable();
731 int sja1000p_register(struct chipspecops_t *chipspecops)
733 CANMSG("initializing sja1000p chip operations\n");
734 chipspecops->chip_config=sja1000p_chip_config;
735 chipspecops->baud_rate=sja1000p_baud_rate;
736 chipspecops->standard_mask=sja1000p_standard_mask;
737 chipspecops->extended_mask=sja1000p_extended_mask;
738 chipspecops->message15_mask=sja1000p_extended_mask;
739 chipspecops->clear_objects=sja1000p_clear_objects;
740 chipspecops->config_irqs=sja1000p_config_irqs;
741 chipspecops->pre_read_config=sja1000p_pre_read_config;
742 chipspecops->pre_write_config=sja1000p_pre_write_config;
743 chipspecops->send_msg=sja1000p_send_msg;
744 chipspecops->check_tx_stat=sja1000p_check_tx_stat;
745 chipspecops->wakeup_tx=sja1000p_wakeup_tx;
746 chipspecops->remote_request=sja1000p_remote_request;
747 chipspecops->enable_configuration=sja1000p_enable_configuration;
748 chipspecops->disable_configuration=sja1000p_disable_configuration;
749 chipspecops->set_btregs=sja1000p_set_btregs;
750 chipspecops->start_chip=sja1000p_start_chip;
751 chipspecops->stop_chip=sja1000p_stop_chip;
752 chipspecops->irq_handler=sja1000p_irq_handler;
753 chipspecops->irq_accept=NULL;
758 * sja1000p_fill_chipspecops - fills chip specific operations
759 * @chip: pointer to chip representation structure
761 * The function fills chip specific operations for sja1000 (PeliCAN) chip.
763 * Return Value: returns negative number in the case of fail
765 int sja1000p_fill_chipspecops(struct canchip_t *chip)
767 chip->chip_type="sja1000p";
769 sja1000p_register(chip->chipspecops);