* This function configures chip and prepares it for message
* transmission and reception. The function resets chip,
* resets mask for acceptance of all messages by call to
- * sja1000p_extended_mask() function and then
+ * sja1000p_extended_mask() function and then
* computes and sets baudrate with use of function sja1000p_baud_rate().
* Return Value: negative value reports error.
* File: src/sja1000p.c
{
int i;
unsigned char n, r;
-
+
if (sja1000p_enable_configuration(chip))
return -ENODEV;
/* Set mode, clock out, comparator */
- can_write_reg(chip,sjaCDR_PELICAN|chip->sja_cdr_reg,SJACDR);
+ can_write_reg(chip,sjaCDR_PELICAN|chip->sja_cdr_reg,SJACDR);
/* Ensure, that interrupts are disabled even on the chip level now */
can_write_reg(chip, sjaDISABLE_INTERRUPTS, SJAIER);
/* Set driver output configuration */
- can_write_reg(chip,chip->sja_ocr_reg,SJAOCR);
-
+ can_write_reg(chip,chip->sja_ocr_reg,SJAOCR);
+
/* Simple check for chip presence */
for (i=0, n=0x5a; i<8; i++, n+=0xf) {
can_write_reg(chip,n,SJAACR0+i);
return -ENODEV;
}
}
-
+
if (sja1000p_extended_mask(chip,0x00000000, 0xffffffff))
return -ENODEV;
-
+
if (!chip->baudrate)
chip->baudrate=1000000;
if (sja1000p_baud_rate(chip,chip->baudrate,chip->clock,0,75,0))
return -ENODEV;
/* Enable hardware interrupts */
- can_write_reg(chip, sjaENABLE_INTERRUPTS, SJAIER);
+ can_write_reg(chip, sjaENABLE_INTERRUPTS, SJAIER);
sja1000p_disable_configuration(chip);
-
+
return 0;
}
if (sja1000p_enable_configuration(chip))
return -ENODEV;
-// LSB to +3, MSB to +0
+// LSB to +3, MSB to +0
for(i=SJA_PeliCAN_AC_LEN; --i>=0;) {
can_write_reg(chip,code&0xff,SJAACR0+i);
can_write_reg(chip,mask&0xff,SJAAMR0+i);
int best_error = 1000000000, error;
int best_tseg=0, best_brp=0, best_rate=0, brp=0;
int tseg=0, tseg1=0, tseg2=0;
-
+
if (sja1000p_enable_configuration(chip))
return -ENODEV;
can_write_reg(chip, sjw<<6 | best_brp, SJABTR0);
- can_write_reg(chip, ((flags & BTR1_SAM) != 0)<<7 | (tseg2<<4)
+ can_write_reg(chip, ((flags & BTR1_SAM) != 0)<<7 | (tseg2<<4)
| tseg1, SJABTR1);
sja1000p_disable_configuration(chip);
{
int status;
status=can_read_reg(chip,SJASR);
-
+
if(status & sjaSR_BS) {
/* Try to recover from error condition */
DEBUGMSG("sja1000p_pre_read_config bus-off recover 0x%x\n",status);
* Return Value: negative value reports error.
* File: src/sja1000p.c
*/
-int sja1000p_pre_write_config(struct canchip_t *chip, struct msgobj_t *obj,
+int sja1000p_pre_write_config(struct canchip_t *chip, struct msgobj_t *obj,
struct canmsg_t *msg)
{
- int i=0;
+ int i=0;
unsigned int id;
int status;
int len;
/* Wait until Transmit Buffer Status is released */
- while ( !((status=can_read_reg(chip, SJASR)) & sjaSR_TBS) &&
+ while ( !((status=can_read_reg(chip, SJASR)) & sjaSR_TBS) &&
i++<MAX_TRANSMIT_WAIT_LOOPS) {
udelay(i);
}
-
+
if(status & sjaSR_BS) {
/* Try to recover from error condition */
DEBUGMSG("sja1000p_pre_write_config bus-off recover 0x%x\n",status);
* Return Value: negative value reports error.
* File: src/sja1000p.c
*/
-int sja1000p_send_msg(struct canchip_t *chip, struct msgobj_t *obj,
+int sja1000p_send_msg(struct canchip_t *chip, struct msgobj_t *obj,
struct canmsg_t *msg)
{
can_write_reg(chip, sjaCMR_TR, SJACMR);
* Return Value: negative value reports error.
* File: src/sja1000p.c
*/
-int sja1000p_set_btregs(struct canchip_t *chip, unsigned short btr0,
+int sja1000p_set_btregs(struct canchip_t *chip, unsigned short btr0,
unsigned short btr1)
{
if (sja1000p_enable_configuration(chip))
void sja1000p_irq_write_handler(struct canchip_t *chip, struct msgobj_t *obj)
{
int cmd;
-
+
if(obj->tx_slot){
/* Do local transmitted message distribution if enabled */
if (processlocal){
/* fill CAN message timestamp */
can_filltimestamp(&obj->tx_slot->msg.timestamp);
-
+
obj->tx_slot->msg.flags |= MSG_LOCAL;
canque_filter_msg2edges(obj->qends, &obj->tx_slot->msg);
}
canque_free_outslot(obj->qends, obj->tx_qedge, obj->tx_slot);
obj->tx_slot=NULL;
}
-
+
can_msgobj_clear_fl(obj,TX_PENDING);
cmd=canque_test_outslot(obj->qends, &obj->tx_qedge, &obj->tx_slot);
if(cmd<0)
* sja1000p_irq_handler: - interrupt service routine
* @irq: interrupt vector number, this value is system specific
* @chip: pointer to chip state structure
- *
+ *
* Interrupt handler is activated when state of CAN controller chip changes,
* there is message to be read or there is more space for new messages or
* error occurs. The receive events results in reading of the message from
DEBUGMSG("TX looping in sja1000_irq_handler\n");
}
}
- if ((irq_register & (sjaIR_EI|sjaIR_BEI|sjaIR_EPI|sjaIR_DOI)) != 0) {
+ if ((irq_register & (sjaIR_EI|sjaIR_BEI|sjaIR_EPI|sjaIR_DOI)) != 0) {
// Some error happened
error_code=can_read_reg(chip,SJAECC);
sja1000_report_error(chip, status, irq_register, error_code);
// FIXME: chip should be brought to usable state. Transmission cancelled if in progress.
// Reset flag set to 0 if chip is already off the bus. Full state report
obj->ret=-1;
-
+
if(error_code == 0xd9) {
obj->ret= -ENXIO;
/* no such device or address - no ACK received */
*/
int sja1000p_wakeup_tx(struct canchip_t *chip, struct msgobj_t *obj)
{
-
+
can_preempt_disable();
-
+
can_msgobj_set_fl(obj,TX_PENDING);
can_msgobj_set_fl(obj,TX_REQUEST);
while(!can_msgobj_test_and_set_fl(obj,TX_LOCK)){
obj->tx_retry_cnt=0;
sja1000p_irq_write_handler(chip, obj);
}
-
+
can_msgobj_clear_fl(obj,TX_LOCK);
if(!can_msgobj_test_fl(obj,TX_REQUEST)) break;
DEBUGMSG("TX looping in sja1000p_wakeup_tx\n");
projects / lincan.git / blobdiff