/*
* Returns a negative error value in case of an error, 0 if processing of
* the firmware should be stopped after this action, 1 otherwise.
*/
static int
process_sigma_action(struct sigma_firmware *ssfw, struct sigma_action *sa)
{
size_t len = sigma_action_len(sa);
int ret;
pr_debug("%s: instr:%i addr:%#x len:%zu\n", __func__,
sa->instr, sa->addr, len);
switch (sa->instr) {
case SIGMA_ACTION_WRITEXBYTES:
case SIGMA_ACTION_WRITESINGLE:
case SIGMA_ACTION_WRITESAFELOAD:
ret = ssfw->write(ssfw->control_data, sa, len);
if (ret < 0)
return -EINVAL;
break;
case SIGMA_ACTION_DELAY:
udelay(len);
len = 0;
break;
case SIGMA_ACTION_END:
return 0;
default:
return -EINVAL;
}
return 1;
}
static size_t sigma_action_size(struct sigma_action *sa)
{
size_t payload = 0;
switch (sa->instr) {
case SIGMA_ACTION_WRITEXBYTES:
case SIGMA_ACTION_WRITESINGLE:
case SIGMA_ACTION_WRITESAFELOAD:
payload = sigma_action_len(sa);
break;
default:
break;
}
payload = ALIGN(payload, 2);
return payload + sizeof(struct sigma_action);
}
/* Return: 0==OK, <0==error, =1 ==no more actions */
static int
process_sigma_action(struct i2c_client *client, struct sigma_firmware *ssfw)
{
struct sigma_action *sa = (void *)(ssfw->fw->data + ssfw->pos);
size_t len = sigma_action_len(sa);
int ret = 0;
pr_debug("%s: instr:%i addr:%#x len:%zu\n", __func__,
sa->instr, sa->addr, len);
switch (sa->instr) {
case SIGMA_ACTION_WRITEXBYTES:
case SIGMA_ACTION_WRITESINGLE:
case SIGMA_ACTION_WRITESAFELOAD:
if (ssfw->fw->size < ssfw->pos + len)
return -EINVAL;
ret = i2c_master_send(client, (void *)&sa->addr, len);
if (ret < 0)
return -EINVAL;
break;
case SIGMA_ACTION_DELAY:
ret = 0;
udelay(len);
len = 0;
break;
case SIGMA_ACTION_END:
return 1;
default:
return -EINVAL;
}
/* when arrive here ret=0 or sent data */
ssfw->pos += sigma_action_size(sa, len);
return ssfw->pos == ssfw->fw->size;
}