android_kernel_cmhtcleo/arch/arm/mach-msm/board-htcleo-ts.c
Markinus 57314174d4 htcleo: fix for random TS freeze
Incresed the pull up resistor for the TS irq GPIO pin
2010-10-17 14:07:40 +02:00

708 lines
16 KiB
C

/* board-htcleo-ts.c
*
* Copyright (C) 2010 Cotulla
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
//#define DEBUG
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include <linux/hrtimer.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <asm/gpio.h>
#include "board-htcleo.h"
#include "board-htcleo-ts.h"
#include "gpio_chip.h"
#include "proc_comm.h"
#define TOUCH_TYPE_UNKNOWN 0
#define TOUCH_TYPE_B8 1
#define TOUCH_TYPE_68 2
#define TOUCH_TYPE_2A 3
#define LEO_TYPE_1 1
#define LEO_TYPE_2 2
#define LEO_TYPE_3 3
#define TYPE_68_DEVID (0x68 >> 1)
#define TYPE_B8_DEVID (0xB8 >> 1)
#define TYPE_2A_DEVID (0x2A >> 1)
#define TS_USE_IRQ 1
#define MAKEWORD(a, b) ((uint16_t)(((uint8_t)(a)) | ((uint16_t)((uint8_t)(b))) << 8))
struct htcleo_ts_data
{
struct i2c_client *client;
struct input_dev *input_dev;
uint32_t prev_ptcount;
int ts_type;
int intr_type; // 0 - FAILING, 1- RISING
int pressed1;
int pressed2;
struct work_struct work;
#ifndef TS_USE_IRQ
struct hrtimer timer;
#endif
uint16_t version;
struct early_suspend early_suspend;
};
struct workqueue_struct *htcleo_touch_wq;
#ifdef CONFIG_HAS_EARLYSUSPEND
static void htcleo_ts_early_suspend(struct early_suspend *h);
static void htcleo_ts_late_resume(struct early_suspend *h);
#endif
static int I2C_Read(struct htcleo_ts_data *ts, uint8_t dev, uint8_t addr, uint32_t sz, uint8_t* bf)
{
struct i2c_msg msg[2];
int ret = 0;
msg[0].addr = dev;
msg[0].flags = 0;
msg[0].len = 1;
msg[0].buf = &addr;
msg[1].addr = dev;
msg[1].flags = I2C_M_RD;
msg[1].len = sz;
msg[1].buf = bf;
ret = i2c_transfer(ts->client->adapter, msg, 2);
if (ret < 0)
{
dev_dbg(&ts->client->dev, "TS: I2C_Read(%x %x) failed!\n", dev, addr);
return 0;
}
return 1;
}
static int I2C_ReadNo(struct htcleo_ts_data *ts, uint8_t dev, uint32_t sz, uint8_t* bf)
{
struct i2c_msg msg[1];
int ret = 0;
msg[0].addr = dev;
msg[0].flags = I2C_M_RD;
msg[0].len = sz;
msg[0].buf = bf;
ret = i2c_transfer(ts->client->adapter, msg, 1);
if (ret < 0)
{
dev_dbg(&ts->client->dev, "TS: I2C_ReadNo(%x) failed!\n", dev);
return 0;
}
return 1;
}
static int htcleo_detect_ts_type(struct htcleo_ts_data *ts)
{
uint8_t bt[4];
ts->ts_type = TOUCH_TYPE_UNKNOWN;
if (I2C_Read(ts, TYPE_B8_DEVID, 0x00, 1, bt))
{
dev_dbg(&ts->client->dev, "TS: DETECTED TYPE B8\n");
ts->ts_type = TOUCH_TYPE_B8;
return 1;
}
if (I2C_Read(ts, TYPE_68_DEVID, 0x00, 1, bt))
{
dev_dbg(&ts->client->dev, "TS: DETECTED TYPE 68\n");
ts->ts_type = TOUCH_TYPE_68;
return 1;
}
if (I2C_ReadNo(ts, TYPE_2A_DEVID, 4, bt) && bt[0] == 0x55)
{
dev_dbg(&ts->client->dev, "TS: DETECTED TYPE 2A\n");
ts->ts_type = TOUCH_TYPE_2A;
return 1;
}
dev_dbg(&ts->client->dev, "TS: NOT DETECTED\n");
return -1;
}
static int htcleo_reset_ts(struct htcleo_ts_data *ts)
{
while (gpio_get_value(HTCLEO_GPIO_TS_POWER))
{
gpio_set_value(HTCLEO_GPIO_TS_SEL, 1);
gpio_set_value(HTCLEO_GPIO_TS_POWER, 0);
gpio_set_value(HTCLEO_GPIO_TS_MULT, 0);
gpio_set_value(HTCLEO_GPIO_H2W_CLK, 0);
msleep(10);
}
gpio_set_value(HTCLEO_GPIO_TS_MULT, 1);
gpio_set_value(HTCLEO_GPIO_H2W_CLK, 1);
while (!gpio_get_value(HTCLEO_GPIO_TS_POWER))
{
gpio_set_value(HTCLEO_GPIO_TS_POWER, 1);
}
msleep(20);
while (gpio_get_value(HTCLEO_GPIO_TS_IRQ))
{
msleep(10);
}
while (gpio_get_value(HTCLEO_GPIO_TS_SEL))
{
gpio_set_value(HTCLEO_GPIO_TS_SEL, 0);
}
msleep(300);
dev_dbg(&ts->client->dev, "TS: reset done\n");
return 1;
}
static int htcleo_init_ts(struct htcleo_ts_data *ts)
{
uint8_t bt[6];
struct i2c_msg msg;
int ret;
switch (ts->ts_type)
{
case TOUCH_TYPE_2A:
bt[0] = 0xD0;
bt[1] = 0x00;
bt[2] = 0x01;
msg.addr = 0x2A >> 1;
msg.flags = 0;
msg.len = 3;
msg.buf = bt;
ret = i2c_transfer(ts->client->adapter, &msg, 1);
if (ret < 0)
{
goto error;
}
break;
default:
dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
goto error;
}
dev_dbg(&ts->client->dev, "TS: init done\n");
return 1;
error:
return -1;
}
static void htcleo_deinit_ts(void)
{
gpio_set_value(HTCLEO_GPIO_TS_POWER, 0);
}
static int htcleo_init_intr(struct htcleo_ts_data *ts)
{
switch (ts->ts_type)
{
case TOUCH_TYPE_B8:
ts->intr_type = 1;
break;
case TOUCH_TYPE_68:
case TOUCH_TYPE_2A:
ts->intr_type = 0;
break;
default:
dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
ts->intr_type = 0;
goto error;
}
return 1;
error:
return -1;
}
static void htcleo_ts_work_func(struct work_struct *work)
{
uint8_t buf[9];
uint32_t ptcount;
uint32_t ptx[2];
uint32_t pty[2];
struct htcleo_ts_data *ts = container_of(work, struct htcleo_ts_data, work);
int pressed1, pressed2;
ptcount = 0;
switch (ts->ts_type)
{
case TOUCH_TYPE_2A:
if (!I2C_ReadNo(ts, TYPE_2A_DEVID, 9, buf))
{
dev_dbg(&ts->client->dev, "TS: ReadPos failed\n");
goto error;
}
if (buf[0] != 0x5A)
{
dev_dbg(&ts->client->dev, "TS: ReadPos wrmark\n");
goto error;
}
ptcount = (buf[8] >> 1) & 3;
if (ptcount > 2)
{
ptcount = 2;
}
if (ptcount >= 1)
{
ptx[0] = MAKEWORD(buf[2], (buf[1] & 0xF0) >> 4);
pty[0] = MAKEWORD(buf[3], (buf[1] & 0x0F) >> 0);
}
if (ptcount == 2)
{
ptx[1] = MAKEWORD(buf[5], (buf[4] & 0xF0) >> 4);
pty[1] = MAKEWORD(buf[6], (buf[4] & 0x0F) >> 0);
}
break;
default:
dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
goto error;
}
if (ptcount == 0)
dev_dbg(&ts->client->dev, "TS: not pressed\n");
else if (ptcount == 1)
dev_dbg(&ts->client->dev, "TS: pressed1 (%d, %d)\n", ptx[0], pty[0]);
else if (ptcount == 2)
dev_dbg(&ts->client->dev, "TS: pressed2 (%d, %d) (%d, %d)\n", ptx[0], pty[0], ptx[1], pty[1]);
else
dev_dbg(&ts->client->dev, "TS: BUGGY!\n");
if (ptcount == 0)
{
pressed1 = 0;
pressed2 = 0;
}
else if (ptcount == 1)
{
pressed1 = 1;
pressed2 = 0;
}
else if (ptcount == 2)
{
pressed1 = 1;
pressed2 = 1;
}
else
{
pressed1 = 0;
pressed2 = 0;
}
if (pressed1)
{
dev_dbg(&ts->client->dev, "pressed1\n");
input_report_abs(ts->input_dev, ABS_X, ptx[0]);
input_report_abs(ts->input_dev, ABS_Y, pty[0]);
input_report_abs(ts->input_dev, ABS_PRESSURE, 100);
input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, 1);
input_report_key(ts->input_dev, BTN_TOUCH, 1);
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[0]);
input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[0]);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 100);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
#endif
}
else if (ts->pressed1)
{
dev_dbg(&ts->client->dev, "unpressed1\n");
input_report_abs(ts->input_dev, ABS_X, ptx[0]);
input_report_abs(ts->input_dev, ABS_Y, pty[0]);
input_report_abs(ts->input_dev, ABS_PRESSURE, 0);
input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, 0);
input_report_key(ts->input_dev, BTN_TOUCH, 0);
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[0]);
input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[0]);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
#endif
}
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
input_mt_sync(ts->input_dev);
if (pressed2)
{
dev_dbg(&ts->client->dev, "pressed2\n");
input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[1]);
input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[1]);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 100);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
}
else if (ts->pressed2)
{
dev_dbg(&ts->client->dev, "unpressed2\n");
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
}
input_mt_sync(ts->input_dev);
#endif
input_sync(ts->input_dev);
ts->pressed1 = pressed1;
ts->pressed2 = pressed2;
error:
ts->prev_ptcount = ptcount;
/* prepare for next intr */
enable_irq(ts->client->irq);
}
#ifndef TS_USE_IRQ
static enum hrtimer_restart htcleo_ts_timer_func(struct hrtimer *timer)
{
struct htcleo_ts_data *ts = container_of(timer, struct htcleo_ts_data, timer);
queue_work(htcleo_touch_wq, &ts->work);
hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL);
return HRTIMER_NORESTART;
}
#else
static irqreturn_t htcleo_ts_irq_handler(int irq, void *dev_id)
{
struct htcleo_ts_data *ts = dev_id;
disable_irq_nosync(ts->client->irq);
queue_work(htcleo_touch_wq, &ts->work);
return IRQ_HANDLED;
}
#endif
////////////////////////////////////////////////////////////////////////////
static uint32_t touch_on_gpio_table[] =
{
PCOM_GPIO_CFG(HTCLEO_GPIO_TS_IRQ, 0, GPIO_INPUT, GPIO_PULL_UP, GPIO_8MA),
};
static int htcleo_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct htcleo_ts_data *ts;
int ret = 0;
int x_start, y_start, x_end, y_end;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
{
dev_err(&client->dev, "need I2C_FUNC_I2C\n");
ret = -ENODEV;
goto err_check_functionality_failed;
}
ts = kzalloc(sizeof(struct htcleo_ts_data), GFP_KERNEL);
if (ts == NULL)
{
dev_err(&client->dev, "allocate htcleo_ts_data failed\n");
ret = -ENOMEM;
goto err_alloc_data_failed;
}
INIT_WORK(&ts->work, htcleo_ts_work_func);
ts->client = client;
i2c_set_clientdata(client, ts);
ts->prev_ptcount = 0;
config_gpio_table(touch_on_gpio_table, ARRAY_SIZE(touch_on_gpio_table));
gpio_request(HTCLEO_GPIO_TS_POWER, "htcleo_ts");
gpio_request(HTCLEO_GPIO_TS_SEL, "htcleo_ts");
gpio_request(HTCLEO_GPIO_TS_IRQ, "htcleo_ts");
gpio_request(HTCLEO_GPIO_TS_MULT, "htcleo_ts");
gpio_request(HTCLEO_GPIO_H2W_CLK, "htcleo_ts");
gpio_direction_output(HTCLEO_GPIO_TS_SEL, 1);
gpio_direction_output(HTCLEO_GPIO_TS_POWER, 0);
gpio_direction_output(HTCLEO_GPIO_TS_MULT, 0);
gpio_direction_output(HTCLEO_GPIO_H2W_CLK, 0);
gpio_direction_input(HTCLEO_GPIO_TS_IRQ);
msleep(100);
ret = htcleo_reset_ts(ts);
if (ret < 0)
{
dev_err(&client->dev, "TS: htcleo_reset_ts() failed\n");
goto err_detect_failed;
}
ret = htcleo_detect_ts_type(ts);
if (ret < 0)
{
dev_err(&client->dev, "TS: htcleo_detect_ts_type() failed\n");
goto err_detect_failed;
}
// !!!other types are not supported yet!!!
if (ts->ts_type == TOUCH_TYPE_68 || ts->ts_type == TOUCH_TYPE_B8)
{
dev_err(&ts->client->dev, "TS: NOT SUPPORTED\n");
BUG();
}
ret = htcleo_init_ts(ts);
if (ret < 0)
{
dev_err(&client->dev, "TS: htcleo_init_ts() failed\n");
goto err_detect_failed;
}
ret = htcleo_init_intr(ts);
if (ret < 0)
{
dev_err(&client->dev, "TS: htcleo_init_intr() failed\n");
goto err_detect_failed;
}
ts->input_dev = input_allocate_device();
if (ts->input_dev == NULL)
{
ret = -ENOMEM;
dev_err(&client->dev, "Failed to allocate input device\n");
goto err_input_dev_alloc_failed;
}
ts->input_dev->name = "htcleo-touchscreen";
// inital touch calibraion
switch (ts->ts_type)
{
case TOUCH_TYPE_2A:
x_start = 6;
y_start = 6;
x_end = 576;
y_end = 952;
break;
}
set_bit(EV_SYN, ts->input_dev->evbit);
set_bit(EV_ABS, ts->input_dev->evbit);
set_bit(EV_KEY, ts->input_dev->evbit);
input_set_capability(ts->input_dev, EV_KEY, BTN_TOUCH);
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
input_set_capability(ts->input_dev, EV_KEY, BTN_2);
#endif
input_set_abs_params(ts->input_dev, ABS_X, x_start, x_end, 5, 0);
input_set_abs_params(ts->input_dev, ABS_Y, y_start, y_end, 5, 0);
input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, 0, 0);
input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, 0, 5, 0, 0);
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, x_start, x_end, 5, 0);
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, y_start, y_end, 5, 0);
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 1, 0, 0);
#endif
// input_set_abs_params(ts->input_dev, ABS_HAT0X, x_start, x_end, 0, 0);
// input_set_abs_params(ts->input_dev, ABS_HAT0Y, y_start, y_end, 0, 0);
// input_set_abs_params(ts->input_dev, ABS_PRESSURE, pdata->abs_pressure_min, pdata->abs_pressure_max, 0, 0);
// input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, pdata->abs_width_min, pdata->abs_width_max, 0, 0);
ret = input_register_device(ts->input_dev);
if (ret)
{
dev_err(&client->dev,
"htcleo_ts_probe: Unable to register %s input device\n",
ts->input_dev->name);
goto err_input_register_device_failed;
}
#ifdef TS_USE_IRQ
ts->client->irq = gpio_to_irq(HTCLEO_GPIO_TS_IRQ);
ret = request_irq(ts->client->irq, htcleo_ts_irq_handler,
ts->intr_type ? IRQF_TRIGGER_HIGH : IRQF_TRIGGER_LOW,
LEO_TOUCH_DRV_NAME, ts);
#else
hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ts->timer.function = htcleo_ts_timer_func;
hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
#endif
#ifdef CONFIG_HAS_EARLYSUSPEND
ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
ts->early_suspend.suspend = htcleo_ts_early_suspend;
ts->early_suspend.resume = htcleo_ts_late_resume;
register_early_suspend(&ts->early_suspend);
#endif
dev_info(&client->dev, "Start touchscreen %s\n", ts->input_dev->name);
return 0;
err_input_register_device_failed:
input_free_device(ts->input_dev);
err_input_dev_alloc_failed:
// POWER OFF
htcleo_deinit_ts();
err_detect_failed:
kfree(ts);
err_alloc_data_failed:
err_check_functionality_failed:
return ret;
}
static int htcleo_ts_remove(struct i2c_client *client)
{
struct htcleo_ts_data *ts = i2c_get_clientdata(client);
unregister_early_suspend(&ts->early_suspend);
#ifdef TS_USE_IRQ
free_irq(client->irq, ts);
#else
hrtimer_cancel(&ts->timer);
#endif
input_unregister_device(ts->input_dev);
kfree(ts);
return 0;
}
static int htcleo_ts_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct htcleo_ts_data *ts = i2c_get_clientdata(client);
int ret;
#ifdef TS_USE_IRQ
disable_irq_nosync(client->irq);
#else
hrtimer_cancel(&ts->timer);
#endif
ret = cancel_work_sync(&ts->work);
if (ret)
{
enable_irq(client->irq);
}
// POWER OFF
htcleo_deinit_ts();
return 0;
}
static int htcleo_ts_resume(struct i2c_client *client)
{
struct htcleo_ts_data *ts = i2c_get_clientdata(client);
// POWER ON
htcleo_reset_ts(ts);
htcleo_detect_ts_type(ts);
htcleo_init_ts(ts);
htcleo_init_intr(ts);
#ifdef TS_USE_IRQ
enable_irq(client->irq);
#else
hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
#endif
return 0;
}
#ifdef CONFIG_HAS_EARLYSUSPEND
static void htcleo_ts_early_suspend(struct early_suspend *h)
{
struct htcleo_ts_data *ts;
ts = container_of(h, struct htcleo_ts_data, early_suspend);
htcleo_ts_suspend(ts->client, PMSG_SUSPEND);
}
static void htcleo_ts_late_resume(struct early_suspend *h)
{
struct htcleo_ts_data *ts;
ts = container_of(h, struct htcleo_ts_data, early_suspend);
htcleo_ts_resume(ts->client);
}
#endif
static const struct i2c_device_id htcleo_ts_id[] =
{
{ LEO_TOUCH_DRV_NAME, 0 },
{ }
};
static struct i2c_driver htcleo_ts_driver =
{
.driver =
{
.name = LEO_TOUCH_DRV_NAME,
.owner = THIS_MODULE,
},
.id_table = htcleo_ts_id,
.probe = htcleo_ts_probe,
.remove = htcleo_ts_remove,
#ifndef CONFIG_HAS_EARLYSUSPEND
.suspend = htcleo_ts_suspend,
.resume = htcleo_ts_resume,
#endif
};
static int __devinit htcleo_ts_init(void)
{
htcleo_touch_wq = create_singlethread_workqueue("htcleo_touch_wq");
if (!htcleo_touch_wq)
{
return -ENOMEM;
}
return i2c_add_driver(&htcleo_ts_driver);
}
static void __exit htcleo_ts_exit(void)
{
if (htcleo_touch_wq)
{
destroy_workqueue(htcleo_touch_wq);
htcleo_touch_wq = NULL;
}
i2c_del_driver(&htcleo_ts_driver);
}
module_init(htcleo_ts_init);
module_exit(htcleo_ts_exit);
MODULE_DESCRIPTION("HTC LEO Touchscreen Support Driver");
MODULE_LICENSE("GPL");