drivers/input/touchscreen/ct36x_ts/rockchip.c

   1
   2 #include <linux/i2c.h>
   3 #include <linux/delay.h>
   4
   5 #include "tscore.h"
   6 #include "rockchip.h"
   7
   8
   9
  10 static struct i2c_device_id ct36x_ts_id[] = {
  11         { DRIVER_NAME, 0 },
  12         { }
  13 };
  14
  15 static struct i2c_board_info i2c_board_info[] = {
  16         {
  17                 I2C_BOARD_INFO(DRIVER_NAME, 0x01),
  18                 .platform_data = NULL,
  19         },
  20 };
  21
  22 struct i2c_driver ct36x_ts_driver  = {
  23         .driver = {
  24                 .owner  = THIS_MODULE,
  25                 .name   = DRIVER_NAME
  26         },
  27         .id_table       = ct36x_ts_id,
  28         .probe      = ct36x_ts_probe,
  29         .shutdown       = ct36x_ts_shutdown,
  30         .suspend        = ct36x_ts_suspend,
  31         .resume     = ct36x_ts_resume,
  32         .remove         = __devexit_p(ct36x_ts_remove),
  33 };
  34
  35 void ct36x_ts_reg_read(struct i2c_client *client, unsigned short addr, char *buf, int len)
  36 {
  37         struct i2c_msg msgs;
  38
  39         msgs.addr = addr;
  40         msgs.flags = 0x01;  // 0x00: write 0x01:read
  41         msgs.len = len;
  42         msgs.buf = buf;
  43         msgs.scl_rate = CT36X_TS_I2C_SPEED;
  44
  45         i2c_transfer(client->adapter, &msgs, 1);
  46 }
  47
  48 void ct36x_ts_reg_write(struct i2c_client *client, unsigned short addr, char *buf, int len)
  49 {
  50         struct i2c_msg msgs;
  51
  52         msgs.addr = addr;
  53         msgs.flags = 0x00;  // 0x00: write 0x01:read
  54         msgs.len = len;
  55         msgs.buf = buf;
  56         msgs.scl_rate = CT36X_TS_I2C_SPEED;
  57
  58         i2c_transfer(client->adapter, &msgs, 1);
  59 }
  60
  61 void ct36x_platform_get_cfg(struct ct36x_ts_info *ct36x_ts)
  62 {
  63         /* I2C config */
  64         ct36x_ts->i2c_bus = CT36X_TS_I2C_BUS;
  65         ct36x_ts->i2c_address = CT36X_TS_I2C_ADDRESS;
  66
  67         /* GPIO config */
  68         ct36x_ts->rst = CT36X_TS_RST_PIN;
  69         ct36x_ts->ss = CT36X_TS_IRQ_PIN;
  70
  71         /* IRQ config*/
  72         ct36x_ts->irq = gpio_to_irq(ct36x_ts->ss);
  73
  74         ct36x_ts->ready = 0;
  75 }
  76
  77 int ct36x_platform_set_dev(struct ct36x_ts_info *ct36x_ts)
  78 {
  79         struct i2c_adapter *adapter;
  80         struct i2c_client *client;
  81
  82         adapter = i2c_get_adapter(ct36x_ts->i2c_bus);
  83         if ( !adapter ) {
  84                 printk("Unable to get i2c adapter on bus %d.\n", ct36x_ts->i2c_bus);
  85                 return -ENODEV;
  86         }
  87
  88         client = i2c_new_device(adapter, i2c_board_info);
  89         i2c_put_adapter(adapter);
  90         if (!client) {
  91                 printk("Unable to create i2c device on bus %d.\n", ct36x_ts->i2c_bus);
  92                 return -ENODEV;
  93         }
  94
  95         ct36x_ts->client = client;
  96         i2c_set_clientdata(client, ct36x_ts);
  97
  98         return 0;
  99 }
 100
 101 int ct36x_platform_get_resource(struct ct36x_ts_info *ct36x_ts)
 102 {
 103         int err = -1;
 104
 105         // Init Reset pin
 106         err = gpio_request(ct36x_ts->rst, "ct36x_ts_rst");
 107         if ( err ) {
 108                 return -EIO;
 109         }
 110         gpio_direction_output(ct36x_ts->rst, 1);
 111         gpio_set_value(ct36x_ts->rst, 1);
 112
 113         // Init Int pin
 114         err = gpio_request(ct36x_ts->ss, "ct36x_ts_int");
 115         if ( err ) {
 116                 return -EIO;
 117         }
 118         gpio_direction_input(ct36x_ts->ss);
 119
 120         return 0;
 121 }
 122
 123 void ct36x_platform_put_resource(struct ct36x_ts_info *ct36x_ts)
 124 {
 125         gpio_free(ct36x_ts->rst);
 126         gpio_free(ct36x_ts->ss);
 127 }
 128
 129 void ct36x_platform_hw_reset(struct ct36x_ts_info *ct36x_ts)
 130 {
 131         mdelay(500);
 132         gpio_set_value(ct36x_ts->rst, 0);
 133         mdelay(50);
 134         gpio_set_value(ct36x_ts->rst, 1);
 135         mdelay(500);
 136 }