summaryrefslogtreecommitdiff
path: root/drivers/input/touchscreen/wdt87xx_i2c.c
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /drivers/input/touchscreen/wdt87xx_i2c.c
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
Diffstat (limited to 'drivers/input/touchscreen/wdt87xx_i2c.c')
-rw-r--r--drivers/input/touchscreen/wdt87xx_i2c.c49
1 files changed, 47 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
index 3ee535026..61353038c 100644
--- a/drivers/input/touchscreen/wdt87xx_i2c.c
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -23,7 +23,7 @@
#include <asm/unaligned.h>
#define WDT87XX_NAME "wdt87xx_i2c"
-#define WDT87XX_DRV_VER "0.9.6"
+#define WDT87XX_DRV_VER "0.9.7"
#define WDT87XX_FW_NAME "/*(DEBLOBBED)*/"
#define WDT87XX_CFG_NAME "/*(DEBLOBBED)*/"
@@ -85,6 +85,11 @@
#define CTL_PARAM_OFFSET_PHY_H 24
#define CTL_PARAM_OFFSET_FACTOR 32
+/* The definition of the device descriptor */
+#define WDT_GD_DEVICE 1
+#define DEV_DESC_OFFSET_VID 8
+#define DEV_DESC_OFFSET_PID 10
+
/* Communication commands */
#define PACKET_SIZE 56
#define VND_REQ_READ 0x06
@@ -152,6 +157,7 @@
/* Controller requires minimum 300us between commands */
#define WDT_COMMAND_DELAY_MS 2
#define WDT_FLASH_WRITE_DELAY_MS 4
+#define WDT_FW_RESET_TIME 2500
struct wdt87xx_sys_param {
u16 fw_id;
@@ -165,6 +171,8 @@ struct wdt87xx_sys_param {
u16 scaling_factor;
u32 max_x;
u32 max_y;
+ u16 vendor_id;
+ u16 product_id;
};
struct wdt87xx_data {
@@ -208,6 +216,32 @@ static int wdt87xx_i2c_xfer(struct i2c_client *client,
return 0;
}
+static int wdt87xx_get_desc(struct i2c_client *client, u8 desc_idx,
+ u8 *buf, size_t len)
+{
+ u8 tx_buf[] = { 0x22, 0x00, 0x10, 0x0E, 0x23, 0x00 };
+ int error;
+
+ tx_buf[2] |= desc_idx & 0xF;
+
+ error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
+ buf, len);
+ if (error) {
+ dev_err(&client->dev, "get desc failed: %d\n", error);
+ return error;
+ }
+
+ if (buf[0] != len) {
+ dev_err(&client->dev, "unexpected response to get desc: %d\n",
+ buf[0]);
+ return -EINVAL;
+ }
+
+ mdelay(WDT_COMMAND_DELAY_MS);
+
+ return 0;
+}
+
static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
u8 *buf, size_t len)
{
@@ -373,7 +407,7 @@ static int wdt87xx_sw_reset(struct i2c_client *client)
}
/* Wait the device to be ready */
- msleep(200);
+ msleep(WDT_FW_RESET_TIME);
return 0;
}
@@ -403,6 +437,15 @@ static int wdt87xx_get_sysparam(struct i2c_client *client,
u8 buf[PKT_READ_SIZE];
int error;
+ error = wdt87xx_get_desc(client, WDT_GD_DEVICE, buf, 18);
+ if (error) {
+ dev_err(&client->dev, "failed to get device desc\n");
+ return error;
+ }
+
+ param->vendor_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_VID);
+ param->product_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_PID);
+
error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
if (error) {
dev_err(&client->dev, "failed to get parameters\n");
@@ -994,6 +1037,8 @@ static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
input->name = "WDT87xx Touchscreen";
input->id.bustype = BUS_I2C;
+ input->id.vendor = wdt->param.vendor_id;
+ input->id.product = wdt->param.product_id;
input->phys = wdt->phys;
input_set_abs_params(input, ABS_MT_POSITION_X, 0,