static int ucb1x00_ts_open(struct input_dev *idev)
{
struct ucb1x00_ts *ts = input_get_drvdata(idev);
int ret = 0;
BUG_ON(ts->rtask);
init_waitqueue_head(&ts->irq_wait);
ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts);
if (ret < 0)
goto out;
/*
* If we do this at all, we should allow the user to
* measure and read the X and Y resistance at any time.
*/
ucb1x00_adc_enable(ts->ucb);
ts->x_res = ucb1x00_ts_read_xres(ts);
ts->y_res = ucb1x00_ts_read_yres(ts);
ucb1x00_adc_disable(ts->ucb);
ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd");
if (!IS_ERR(ts->rtask)) {
ret = 0;
} else {
ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
ts->rtask = NULL;
ret = -EFAULT;
}
out:
return ret;
}
/*
* Initialisation.
*/
static int ucb1x00_ts_add(struct ucb1x00_dev *dev)
{
struct ucb1x00_ts *ts;
struct input_dev *idev;
int err;
ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL);
idev = input_allocate_device();
if (!ts || !idev) {
err = -ENOMEM;
goto fail;
}
ts->ucb = dev->ucb;
ts->idev = idev;
ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC;
idev->name = "Touchscreen panel";
idev->id.product = ts->ucb->id;
idev->open = ucb1x00_ts_open;
idev->close = ucb1x00_ts_close;
idev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_drvdata(idev, ts);
ucb1x00_adc_enable(ts->ucb);
ts->x_res = ucb1x00_ts_read_xres(ts);
ts->y_res = ucb1x00_ts_read_yres(ts);
ucb1x00_adc_disable(ts->ucb);
input_set_abs_params(idev, ABS_X, 0, ts->x_res, 0, 0);
input_set_abs_params(idev, ABS_Y, 0, ts->y_res, 0, 0);
input_set_abs_params(idev, ABS_PRESSURE, 0, 0, 0, 0);
err = input_register_device(idev);
if (err)
goto fail;
dev->priv = ts;
return 0;
fail:
input_free_device(idev);
kfree(ts);
return err;
}
int collie_read_backup_battery(void)
{
int voltage;
ucb1x00_adc_enable(ucb);
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
ucb1x00_adc_disable(ucb);
printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
return ADCtoPower(voltage);
}
int collie_read_temp(void)
{
int voltage;
/* According to Sharp, temp must be > 973, main battery must be < 465,
FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
are way out of range? */
ucb1x00_adc_enable(ucb);
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
/* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
ucb1x00_adc_disable(ucb);
printk("Battery temp = %d\n", voltage);
return voltage;
}
static unsigned long collie_read_bat(struct collie_bat *bat)
{
unsigned long value = 0;
if (bat->gpio_bat < 0 || bat->adc_bat < 0)
return 0;
mutex_lock(&bat_lock);
gpio_set_value(bat->gpio_bat, 1);
msleep(5);
ucb1x00_adc_enable(ucb);
value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);
ucb1x00_adc_disable(ucb);
gpio_set_value(bat->gpio_bat, 0);
mutex_unlock(&bat_lock);
value = value * 1000000 / bat->adc_bat_divider;
return value;
}
int collie_read_main_battery(void)
{
int voltage, voltage_rev, voltage_volts;
ucb1x00_adc_enable(ucb);
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
mdelay(1);
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
ucb1x00_adc_disable(ucb);
voltage_rev = voltage + ((ad_revise * voltage) / 652);
voltage_volts = ADCtoPower(voltage_rev);
printk("Main battery = %d(%d)\n", voltage_volts, voltage);
if (voltage != -1)
return voltage_volts;
else
return voltage;
}
/*
* This is a RT kernel thread that handles the ADC accesses
* (mainly so we can use semaphores in the UCB1200 core code
* to serialise accesses to the ADC).
*/
static int ucb1x00_thread(void *_ts)
{
struct ucb1x00_ts *ts = _ts;
DECLARE_WAITQUEUE(wait, current);
int valid = 0;
set_freezable();
add_wait_queue(&ts->irq_wait, &wait);
while (!kthread_should_stop()) {
unsigned int x, y, p;
signed long timeout;
ts->restart = 0;
ucb1x00_adc_enable(ts->ucb);
x = ucb1x00_ts_read_xpos(ts);
y = ucb1x00_ts_read_ypos(ts);
p = ucb1x00_ts_read_pressure(ts);
/*
* Switch back to interrupt mode.
*/
ucb1x00_ts_mode_int(ts);
ucb1x00_adc_disable(ts->ucb);
msleep(10);
ucb1x00_enable(ts->ucb);
if (ucb1x00_ts_pen_down(ts)) {
set_current_state(TASK_INTERRUPTIBLE);
ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING);
ucb1x00_disable(ts->ucb);
/*
* If we spat out a valid sample set last time,
* spit out a "pen off" sample here.
*/
if (valid) {
ucb1x00_ts_event_release(ts);
valid = 0;
}
timeout = MAX_SCHEDULE_TIMEOUT;
} else {
ucb1x00_disable(ts->ucb);
/*
* Filtering is policy. Policy belongs in user
* space. We therefore leave it to user space
* to do any filtering they please.
*/
if (!ts->restart) {
ucb1x00_ts_evt_add(ts, p, x, y);
valid = 1;
}
set_current_state(TASK_INTERRUPTIBLE);
timeout = HZ / 100;
}
try_to_freeze();
schedule_timeout(timeout);
}
remove_wait_queue(&ts->irq_wait, &wait);
ts->rtask = NULL;
return 0;
}
