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////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2006-2012 MStar Semiconductor, Inc.
// All rights reserved.
//
// Unless otherwise stipulated in writing, any and all information contained
// herein regardless in any format shall remain the sole proprietary of
// MStar Semiconductor Inc. and be kept in strict confidence
// (??MStar Confidential Information??) by the recipient.
// Any unauthorized act including without limitation unauthorized disclosure,
// copying, use, reproduction, sale, distribution, modification, disassembling,
// reverse engineering and compiling of the contents of MStar Confidential
// Information is unlawful and strictly prohibited. MStar hereby reserves the
// rights to any and all damages, losses, costs and expenses resulting therefrom.
//
////////////////////////////////////////////////////////////////////////////////
/**
*
* @file mstar_drv_sprd.c
*
* @brief This file defines the interface of touch screen
*
* @version v2.2.0.0
*
*/
/*=============================================================*/
// INCLUDE FILE
/*=============================================================*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/earlysuspend.h>
#include <linux/i2c.h>
#include <linux/kobject.h>
#include <asm/irq.h>
#include <asm/io.h>
#include "mstar_drv_platform_interface.h"
#ifdef CONFIG_ENABLE_REGULATOR_POWER_ON
#include <soc/sprd/regulator.h>
#include <linux/regulator/consumer.h>
#endif //CONFIG_ENABLE_REGULATOR_POWER_ON
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/of_gpio.h>
/*=============================================================*/
// CONSTANT VALUE DEFINITION
/*=============================================================*/
//#define MSG_TP_IC_NAME "pixcir_ts" //"msg21xxA" or "msg22xx" or "msg26xxM" /* Please define the mstar touch ic name based on the mutual-capacitive ic or self capacitive ic that you are using */
/*=============================================================*/
// VARIABLE DEFINITION
/*=============================================================*/
struct i2c_client *g_I2cClient = NULL;
int TOUCH_SCREEN_X_MAX = 0;
int TOUCH_SCREEN_Y_MAX = 0;
int MS_TS_MSG_IC_GPIO_RST = 0;
int MS_TS_MSG_IC_GPIO_INT = 0;
#ifdef CONFIG_ENABLE_REGULATOR_POWER_ON
struct regulator *g_ReguVdd = NULL;
#endif //CONFIG_ENABLE_REGULATOR_POWER_ON
#ifdef CONFIG_OF
static struct msg2138_ts_platform_data *pixcir_ts_parse_dt(struct device *dev)
{
struct msg2138_ts_platform_data *pdata = NULL;
struct device_node *np = dev->of_node;
int ret;
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
dev_err(dev, "Could not allocate struct msg2138_ts_platform_data");
return NULL;
}
pdata->reset_gpio_number = of_get_gpio(np, 0);
if(pdata->reset_gpio_number < 0){
dev_err(dev, "fail to get reset_gpio_number\n");
goto fail;
}
pdata->irq_gpio_number = of_get_gpio(np, 1);
if(pdata->irq_gpio_number < 0){
dev_err(dev, "fail to get irq_gpio_number\n");
goto fail;
}
ret = of_property_read_string(np, "vdd_name", &pdata->vdd_name);
if(ret){
dev_err(dev, "fail to get vdd_name\n");
goto fail;
}
ret = of_property_read_u32_array(np, "virtualkeys", &pdata->virtualkeys,12);
if(ret){
dev_err(dev, "fail to get virtualkeys\n");
goto fail;
}
ret = of_property_read_u32(np, "TP_MAX_X", &pdata->TP_MAX_X);
if(ret){
dev_err(dev, "fail to get TP_MAX_X\n");
goto fail;
}
ret = of_property_read_u32(np, "TP_MAX_Y", &pdata->TP_MAX_Y);
if(ret){
dev_err(dev, "fail to get TP_MAX_Y\n");
goto fail;
}
return pdata;
fail:
kfree(pdata);
return NULL;
}
#endif
/*=============================================================*/
// FUNCTION DEFINITION
/*=============================================================*/
/* probe function is used for matching and initializing input device */
static int /*__devinit*/ touch_driver_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct msg2138_ts_platform_data *pdata = client->dev.platform_data;
int err = 0, i = 0;
DBG("*** %s ***\n", __FUNCTION__);
if (client == NULL)
{
DBG("i2c client is NULL\n");
return -1;
}
#ifdef CONFIG_OF
struct device_node *np = client->dev.of_node;
if (np && !pdata){
pdata = pixcir_ts_parse_dt(&client->dev);
if(pdata){
client->dev.platform_data = pdata;
} else {
err = -ENOMEM;
goto exit_alloc_platform_data_failed;
}
}
#endif
g_I2cClient = client;
MS_TS_MSG_IC_GPIO_RST = pdata->reset_gpio_number;
MS_TS_MSG_IC_GPIO_INT = pdata->irq_gpio_number;
TOUCH_SCREEN_X_MAX = pdata->TP_MAX_X;
TOUCH_SCREEN_Y_MAX = pdata->TP_MAX_Y;
for(i=0; i<MAX_FINGER_NUM*2; i++) {
point_slot[i].active = 0;
}
#ifdef CONFIG_ENABLE_REGULATOR_POWER_ON
g_ReguVdd = regulator_get(&g_I2cClient->dev, pdata->vdd_name);
#endif //CONFIG_ENABLE_REGULATOR_POWER_ON
return MsDrvInterfaceTouchDeviceProbe(g_I2cClient, id);
exit_alloc_platform_data_failed:
return err;
}
/* remove function is triggered when the input device is removed from input sub-system */
static int /*__devexit*/ touch_driver_remove(struct i2c_client *client)
{
DBG("*** %s ***\n", __FUNCTION__);
return MsDrvInterfaceTouchDeviceRemove(client);
}
/* The I2C device list is used for matching I2C device and I2C device driver. */
static const struct i2c_device_id touch_device_id[] =
{
{MSG_TP_IC_NAME, MSG_TP_I2C_ADDR}, //SLAVE_I2C_ID_DWI2C
{}, /* should not omitted */
};
MODULE_DEVICE_TABLE(i2c, touch_device_id);
static const struct of_device_id msg2138_of_match[] = {
{ .compatible = "Mstar,msg2138_ts", },
{ }
};
MODULE_DEVICE_TABLE(of, msg2138_of_match);
static struct i2c_driver touch_device_driver =
{
.driver = {
.name = MSG_TP_IC_NAME,
.owner = THIS_MODULE,
.of_match_table = msg2138_of_match,
},
.probe = touch_driver_probe,
.remove = touch_driver_remove,
/* .remove = __devexit_p(touch_driver_remove), */
.id_table = touch_device_id,
};
static int /*__init*/ touch_driver_init(void)
{
int ret;
/* register driver */
ret = i2c_add_driver(&touch_device_driver);
if (ret < 0)
{
DBG("add touch device driver i2c driver failed.\n");
return -ENODEV;
}
DBG("add touch device driver i2c driver.\n");
return ret;
}
static void /*__exit*/ touch_driver_exit(void)
{
DBG("remove touch device driver i2c driver.\n");
i2c_del_driver(&touch_device_driver);
}
module_init(touch_driver_init);
module_exit(touch_driver_exit);
MODULE_LICENSE("GPL");
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