/* Interrupt enable/disable */
SDIOH_API_RC
sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
{
ulong flags;
struct sdos_info *sdos;
sd_trace(("%s: %s\n", __FUNCTION__, enable ? "Enabling" : "Disabling"));
sdos = (struct sdos_info *)sd->sdos_info;
ASSERT(sdos);
if (!(sd->host_init_done && sd->card_init_done)) {
sd_err(("%s: Card & Host are not initted - bailing\n", __FUNCTION__));
return SDIOH_API_RC_FAIL;
}
if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
return SDIOH_API_RC_FAIL;
}
/* Ensure atomicity for enable/disable calls */
spin_lock_irqsave(&sdos->lock, flags);
sd->client_intr_enabled = enable;
if (enable && !sd->lockcount)
sdstd_devintr_on(sd);
else
sdstd_devintr_off(sd);
spin_unlock_irqrestore(&sdos->lock, flags);
return SDIOH_API_RC_SUCCESS;
}
/* Protect against reentrancy (disable device interrupts while executing) */
void
sdstd_lock(sdioh_info_t *sd)
{
ulong flags;
struct sdos_info *sdos;
int wait_count = 0;
sdos = (struct sdos_info *)sd->sdos_info;
ASSERT(sdos);
sd_trace(("%s: %d\n", __FUNCTION__, sd->lockcount));
spin_lock_irqsave(&sdos->lock, flags);
while (sd->lockcount)
{
spin_unlock_irqrestore(&sdos->lock, flags);
yield();
spin_lock_irqsave(&sdos->lock, flags);
if (++wait_count == 10000) {
ASSERT(sd->lockcount == 0);
}
}
if (wait_count)
printf("sdstd_lock: wait count = %d\n", wait_count);
sdstd_devintr_off(sd);
sd->lockcount++;
spin_unlock_irqrestore(&sdos->lock, flags);
}
/* Protect against reentrancy (disable device interrupts while executing) */
void
sdstd_lock(sdioh_info_t *sd)
{
ulong flags;
struct sdos_info *sdos;
sdos = (struct sdos_info *)sd->sdos_info;
ASSERT(sdos);
sd_trace(("%s: %d\n", __FUNCTION__, sd->lockcount));
spin_lock_irqsave(&sdos->lock, flags);
if (sd->lockcount) {
sd_err(("%s: Already locked!\n", __FUNCTION__));
ASSERT(sd->lockcount == 0);
}
sdstd_devintr_off(sd);
sd->lockcount++;
spin_unlock_irqrestore(&sdos->lock, flags);
}
