/*
- * linux/drivers/mfd/ucb1x00-ts.c
+ * Touchscreen driver for UCB1x00-based touchscreens
*
* Copyright (C) 2001 Russell King, All Rights Reserved.
+ * Copyright (C) 2005 Pavel Machek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <linux/device.h>
#include <linux/suspend.h>
#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
#include <asm/dma.h>
#include <asm/semaphore.h>
+#include <asm/arch/collie.h>
+#include <asm/mach-types.h>
#include "ucb1x00.h"
struct ucb1x00_ts {
- struct input_dev idev;
+ struct input_dev *idev;
struct ucb1x00 *ucb;
wait_queue_head_t irq_wait;
- struct semaphore sem;
- struct completion init_exit;
struct task_struct *rtask;
- int use_count;
u16 x_res;
u16 y_res;
- int restart:1;
- int adcsync:1;
+ unsigned int restart:1;
+ unsigned int adcsync:1;
};
static int adcsync;
static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y)
{
- input_report_abs(&ts->idev, ABS_X, x);
- input_report_abs(&ts->idev, ABS_Y, y);
- input_report_abs(&ts->idev, ABS_PRESSURE, pressure);
- input_sync(&ts->idev);
+ input_report_abs(ts->idev, ABS_X, x);
+ input_report_abs(ts->idev, ABS_Y, y);
+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
+ input_sync(ts->idev);
}
static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts)
{
- input_report_abs(&ts->idev, ABS_PRESSURE, 0);
- input_sync(&ts->idev);
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ input_sync(ts->idev);
}
/*
*/
static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts)
{
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
- UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ if (machine_is_collie()) {
+ ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0);
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW |
+ UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
- return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync);
+ udelay(55);
+
+ return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync);
+ } else {
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
+ UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
+ UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+
+ return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync);
+ }
}
/*
*/
static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts)
{
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ if (machine_is_collie())
+ ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK);
+ else {
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+ UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+ UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ }
ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
*/
static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts)
{
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ if (machine_is_collie())
+ ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK);
+ else {
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+ UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+ UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+ UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+ }
+
ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync);
}
+static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts)
+{
+ unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR);
+ if (machine_is_collie())
+ return (!(val & (UCB_TS_CR_TSPX_LOW)));
+ else
+ return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW));
+}
+
/*
* This is a RT kernel thread that handles the ADC accesses
* (mainly so we can use semaphores in the UCB1200 core code
DECLARE_WAITQUEUE(wait, tsk);
int valid;
- ts->rtask = tsk;
-
- daemonize("ktsd");
- /* only want to receive SIGKILL */
- allow_signal(SIGKILL);
-
/*
* We could run as a real-time thread. However, thus far
* this doesn't seem to be necessary.
// tsk->policy = SCHED_FIFO;
// tsk->rt_priority = 1;
- complete(&ts->init_exit);
-
valid = 0;
add_wait_queue(&ts->irq_wait, &wait);
- for (;;) {
- unsigned int x, y, p, val;
+ while (!kthread_should_stop()) {
+ unsigned int x, y, p;
signed long timeout;
ts->restart = 0;
ucb1x00_ts_mode_int(ts);
ucb1x00_adc_disable(ts->ucb);
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- schedule_timeout(HZ / 100);
- if (signal_pending(tsk))
- break;
+ msleep(10);
ucb1x00_enable(ts->ucb);
- val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR);
- if (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)) {
+
+ if (ucb1x00_ts_pen_down(ts)) {
set_task_state(tsk, TASK_INTERRUPTIBLE);
- ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING);
+ ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING);
ucb1x00_disable(ts->ucb);
/*
try_to_freeze();
schedule_timeout(timeout);
- if (signal_pending(tsk))
- break;
}
remove_wait_queue(&ts->irq_wait, &wait);
ts->rtask = NULL;
- complete_and_exit(&ts->init_exit, 0);
+ return 0;
}
/*
struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev;
int ret = 0;
- if (down_interruptible(&ts->sem))
- return -EINTR;
-
- if (ts->use_count++ != 0)
- goto out;
-
- if (ts->rtask)
- panic("ucb1x00: rtask running?");
+ BUG_ON(ts->rtask);
init_waitqueue_head(&ts->irq_wait);
ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts);
ts->y_res = ucb1x00_ts_read_yres(ts);
ucb1x00_adc_disable(ts->ucb);
- init_completion(&ts->init_exit);
- ret = kernel_thread(ucb1x00_thread, ts, CLONE_KERNEL);
- if (ret >= 0) {
- wait_for_completion(&ts->init_exit);
+ 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:
- if (ret)
- ts->use_count--;
- up(&ts->sem);
return ret;
}
{
struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev;
- down(&ts->sem);
- if (--ts->use_count == 0) {
- if (ts->rtask) {
- send_sig(SIGKILL, ts->rtask, 1);
- wait_for_completion(&ts->init_exit);
- }
+ if (ts->rtask)
+ kthread_stop(ts->rtask);
- ucb1x00_enable(ts->ucb);
- ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
- ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0);
- ucb1x00_disable(ts->ucb);
- }
- up(&ts->sem);
+ ucb1x00_enable(ts->ucb);
+ ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
+ ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0);
+ ucb1x00_disable(ts->ucb);
}
#ifdef CONFIG_PM
{
struct ucb1x00_ts *ts;
- ts = kmalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL);
+ ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
- memset(ts, 0, sizeof(struct ucb1x00_ts));
+ ts->idev = input_allocate_device();
+ if (!ts->idev) {
+ kfree(ts);
+ return -ENOMEM;
+ }
ts->ucb = dev->ucb;
ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC;
- init_MUTEX(&ts->sem);
- ts->idev.name = "Touchscreen panel";
- ts->idev.id.product = ts->ucb->id;
- ts->idev.open = ucb1x00_ts_open;
- ts->idev.close = ucb1x00_ts_close;
+ ts->idev->name = "Touchscreen panel";
+ ts->idev->id.product = ts->ucb->id;
+ ts->idev->open = ucb1x00_ts_open;
+ ts->idev->close = ucb1x00_ts_close;
- __set_bit(EV_ABS, ts->idev.evbit);
- __set_bit(ABS_X, ts->idev.absbit);
- __set_bit(ABS_Y, ts->idev.absbit);
- __set_bit(ABS_PRESSURE, ts->idev.absbit);
+ __set_bit(EV_ABS, ts->idev->evbit);
+ __set_bit(ABS_X, ts->idev->absbit);
+ __set_bit(ABS_Y, ts->idev->absbit);
+ __set_bit(ABS_PRESSURE, ts->idev->absbit);
- input_register_device(&ts->idev);
+ input_register_device(ts->idev);
dev->priv = ts;
static void ucb1x00_ts_remove(struct ucb1x00_dev *dev)
{
struct ucb1x00_ts *ts = dev->priv;
- input_unregister_device(&ts->idev);
+
+ input_unregister_device(ts->idev);
kfree(ts);
}
projects / linux-2.6 / blobdiff