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uru4000: Retry initialization 3 times

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Sometimes we don't get the powerup interrupt, so retry the whole process
up to 3 times if we time out waiting for the interrupt.
This commit is contained in:
Daniel Drake 2008-03-03 23:24:00 +00:00
parent 2d27df0268
commit 07a42d5f91
1 changed files with 38 additions and 4 deletions
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42
libfprint/drivers/uru4000.c
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@ -133,6 +133,9 @@ struct uru4k_dev {
int powerup_ctr;
unsigned char powerup_hwstat;
int scanpwr_irq_timeouts;
struct fpi_timeout *scanpwr_irq_timeout;
AES_KEY aeskey;
};
@ -888,6 +891,24 @@ static void init_scanpwr_irq_cb(struct fp_img_dev *dev, int status,
fpi_ssm_next_state(ssm);
}
static void init_scanpwr_timeout(void *user_data)
{
struct fpi_ssm *ssm = user_data;
struct fp_img_dev *dev = ssm->priv;
struct uru4k_dev *urudev = dev->priv;
fp_warn("powerup timed out");
urudev->irq_cb = NULL;
urudev->scanpwr_irq_timeout = NULL;
if (++urudev->scanpwr_irq_timeouts >= 3) {
fp_err("powerup timed out 3 times, giving up");
fpi_ssm_mark_aborted(ssm, -ETIMEDOUT);
} else {
fpi_ssm_jump_to_state(ssm, INIT_GET_HWSTAT);
}
}
static void init_run_state(struct fpi_ssm *ssm)
{
struct fp_img_dev *dev = ssm->priv;
@ -925,15 +946,27 @@ static void init_run_state(struct fpi_ssm *ssm)
fpi_ssm_start_subsm(ssm, powerupsm);
break;
case INIT_AWAIT_SCAN_POWER:
/* FIXME: should timeout and maybe retry entire sm? */
if (!IRQ_HANDLER_IS_RUNNING(urudev)) {
fpi_ssm_mark_aborted(ssm, -EIO);
} else {
urudev->irq_cb_data = ssm;
urudev->irq_cb = init_scanpwr_irq_cb;
break;
}
/* sometimes the 56aa interrupt that we are waiting for never arrives,
* so we include this timeout loop to retry the whole process 3 times
* if we don't get an irq any time soon. */
urudev->scanpwr_irq_timeout = fpi_timeout_add(300,
init_scanpwr_timeout, ssm);
if (!urudev->scanpwr_irq_timeout) {
fpi_ssm_mark_aborted(ssm, -ETIME);
break;
}
urudev->irq_cb_data = ssm;
urudev->irq_cb = init_scanpwr_irq_cb;
break;
case INIT_DONE:
fpi_timeout_cancel(urudev->scanpwr_irq_timeout);
urudev->scanpwr_irq_timeout = NULL;
urudev->irq_cb_data = NULL;
urudev->irq_cb = NULL;
fpi_ssm_mark_completed(ssm);
@ -971,6 +1004,7 @@ static int dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state)
if (r < 0)
return r;
urudev->scanpwr_irq_timeouts = 0;
urudev->activate_state = state;
ssm = fpi_ssm_new(dev->dev, init_run_state, INIT_NUM_STATES);
ssm->priv = dev;