static ssize_t tsc2005_ctrl_selftest_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u16 temp_high_orig, temp_high_test, temp_high;
unsigned int result = 1;
struct tsc2005 *ts = dev_get_drvdata(dev);
if (!ts->set_reset) {
dev_warn(&ts->spi->dev,
"unable to selftest: reset not configured\n");
result = 0;
goto out;
}
mutex_lock(&ts->mutex);
tsc2005_disable(ts);
/* Test ctrl communications via temp high / low registers */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
temp_high_test = (temp_high_orig - 1) & 0x0FFF;
tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_test) {
result = 0;
dev_warn(dev, "selftest failed: %d != %d\n",
temp_high, temp_high_test);
}
/* HW Reset */
ts->set_reset(0);
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_enable(ts);
/* Test that reset really happened */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_orig) {
result = 0;
dev_warn(dev, "selftest failed after reset: "
"%d != %d\n",
temp_high, temp_high_orig);
}
mutex_unlock(&ts->mutex);
out:
return sprintf(buf, "%u\n", result);
}
static ssize_t tsc2005_selftest_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct tsc2005 *ts = dev_get_drvdata(dev);
u16 temp_high;
u16 temp_high_orig;
u16 temp_high_test;
unsigned int result;
if (!ts->set_reset) {
dev_warn(&ts->spi->dev,
"unable to selftest: no reset function\n");
result = 0;
goto out;
}
mutex_lock(&ts->mutex);
/*
* Test TSC2005 communications via temp high register.
*/
tsc2005_disable(ts);
result = 1;
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_test) {
dev_warn(dev, "selftest failed: %d != %d\n",
temp_high, temp_high_test);
result = 0;
}
/* hardware reset */
ts->set_reset(0);
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_enable(ts);
/* test that the reset really happened */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_orig) {
dev_warn(dev, "selftest failed after reset: %d != %d\n",
temp_high, temp_high_orig);
result = 0;
}
mutex_unlock(&ts->mutex);
out:
return sprintf(buf, "%u\n", result);
}
static void tsc2005_esd_work(struct work_struct *work)
{
struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work);
u16 r;
mutex_lock(&ts->mutex);
if (ts->disable_depth)
goto out;
/*
* If we cannot read our known value from configuration register 0 then
* reset the controller as if from power-up and start scanning again.
*/
tsc2005_read(ts, TSC2005_REG_CFR0, &r);
if ((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) {
dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
ts->set_reset(0);
tsc2005_update_pen_state(ts, 0, 0, 0);
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_start_scan(ts);
}
/* re-arm the watchdog */
mod_timer(&ts->esd_timer,
round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
out:
mutex_unlock(&ts->mutex);
}
static void tsc2005_rst_handler(struct work_struct *work)
{
u16 reg_val;
struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work);
unsigned long wdj;
mutex_lock(&ts->mutex);
/* If we are disabled, or the a touch has been detected,
* then ignore this timeout. The enable will restart the
* watchdog, as it restarts scanning
*/
if (ts->disable_depth)
goto out;
/* If we cannot read our known value from configuration register 0
* then reset the controller as if from power-up and start
* scanning again. Always re-arm the watchdog.
*/
tsc2005_read(ts, TSC2005_REG_CFR0, ®_val);
if ((reg_val ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) {
dev_info(&ts->spi->dev, "TSC not responding, resetting.\n");
/* If this timer kicked in, the penup timer, if ever active
* at all, must have expired ages ago, so no need to del it.
*/
ts->set_reset(0);
if (ts->sample_sent) {
tsc2005_ts_update_pen_state(ts, 0, 0, 0);
ts->sample_sent = 0;
}
ts->spi_pending = 0;
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_start_scan(ts);
}
wdj = msecs_to_jiffies(ts->esd_timeout);
mod_timer(&ts->esd_timer, round_jiffies(jiffies+wdj));
out:
mutex_unlock(&ts->mutex);
}
