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MINIARM: ts: Add the ft5406 touch driver for tinker board.

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Change-Id: I03eeb48d60cfad984038bf2301f7bb41d4d95804
This commit is contained in:
Tzuhsuan_Chen
2017-07-22 20:35:43 +08:00
committed by Jacob Chen
parent a62972a55d
commit 8f299bac54
5 changed files with 402 additions and 0 deletions
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7
arch/arm/mach-rockchip/rockchip.c
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@@ -40,6 +40,12 @@ static struct i2c_board_info __initdata i2c_devices_tinker_mcu[] = {
}, },
}; };
static struct i2c_board_info __initdata i2c_devices_tinker_ft5406[] = {
{
I2C_BOARD_INFO("tinker_ft5406", 0x38),
},
};
static void __init rockchip_timer_init(void) static void __init rockchip_timer_init(void)
{ {
if (of_machine_is_compatible("rockchip,rk3288")) { if (of_machine_is_compatible("rockchip,rk3288")) {
@@ -71,6 +77,7 @@ static void __init rockchip_dt_init(void)
platform_device_register_simple("cpufreq-dt", 0, NULL, 0); platform_device_register_simple("cpufreq-dt", 0, NULL, 0);
i2c_register_board_info(3, i2c_devices_tinker_mcu, ARRAY_SIZE(i2c_devices_tinker_mcu)); i2c_register_board_info(3, i2c_devices_tinker_mcu, ARRAY_SIZE(i2c_devices_tinker_mcu));
i2c_register_board_info(3, i2c_devices_tinker_ft5406, ARRAY_SIZE(i2c_devices_tinker_ft5406));
} }
static const char * const rockchip_board_dt_compat[] = { static const char * const rockchip_board_dt_compat[] = {

7
drivers/miniarm/dsi/Kconfig
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@@ -34,3 +34,10 @@ config TINKER_MCU
depends on I2C depends on I2C
help help
Control the power of touch screen for tinker board. Control the power of touch screen for tinker board.
config TOUCHSCREEN_TINKER_FT5406
tristate "tinker ft5406"
default y
depends on I2C
help
Control ft5406 touch ic.

1
drivers/miniarm/dsi/Makefile
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@@ -2,3 +2,4 @@ obj-$(CONFIG_DRM_PANEL_TOSHIBA_TC358762) += panel-toshiba-tc358762.o
obj-$(CONFIG_ASUS_RPI_MCU) += asus_mcu.o obj-$(CONFIG_ASUS_RPI_MCU) += asus_mcu.o
obj-$(CONFIG_ROCKCHIP_DW_MIPI_DSI2) += dw-mipi-dsi.o obj-$(CONFIG_ROCKCHIP_DW_MIPI_DSI2) += dw-mipi-dsi.o
obj-$(CONFIG_TINKER_MCU) += tinker_mcu.o obj-$(CONFIG_TINKER_MCU) += tinker_mcu.o
obj-$(CONFIG_TOUCHSCREEN_TINKER_FT5406) += tinker_ft5406.o

323
drivers/miniarm/dsi/tinker_ft5406.c Normal file
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@@ -0,0 +1,323 @@
/*
*
* TINKER BOARD FT5406 touch driver.
*
* Copyright (c) 2016 ASUSTek Computer Inc.
* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include "tinker_ft5406.h"
static int fts_i2c_read(struct i2c_client *client, char *writebuf,
int writelen, char *readbuf, int readlen)
{
int ret;
if (writelen > 0) {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = writelen,
.buf = writebuf,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret < 0)
LOG_ERR("i2c read error, %d\n", ret);
} else {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 1);
if (ret < 0)
LOG_ERR("i2c read error, %d\n", ret);
}
return ret;
}
static int fts_read_reg(struct i2c_client *client, u8 addr, u8 *val)
{
return fts_i2c_read(client, &addr, 1, val, 1);
}
static int fts_check_fw_ver(struct i2c_client *client)
{
u8 reg_addr, fw_ver[3];
int ret;
reg_addr = FT_REG_FW_VER;
ret = fts_i2c_read(client, &reg_addr, 1, &fw_ver[0], 1);
if (ret < 0)
goto error;
reg_addr = FT_REG_FW_MIN_VER;
ret = fts_i2c_read(client, &reg_addr, 1, &fw_ver[1], 1);
if (ret < 0)
goto error;
reg_addr = FT_REG_FW_SUB_MIN_VER;
ret = fts_i2c_read(client, &reg_addr, 1, &fw_ver[2], 1);
if (ret < 0)
goto error;
LOG_INFO("Firmware version = %d.%d.%d\n", fw_ver[0], fw_ver[1], fw_ver[2]);
return 0;
error:
return ret;
}
static int fts_read_td_status(struct tinker_ft5406_data *ts_data)
{
u8 td_status;
int ret = -1;
ret = fts_read_reg(ts_data->client, FT_TD_STATUS_REG, &td_status);
if (ret < 0) {
LOG_ERR("get reg td_status failed, %d\n", ret);
return ret;
}
return (int)td_status;
}
static int fts_read_touchdata(struct tinker_ft5406_data *ts_data)
{
struct ts_event *event = &ts_data->event;
int ret = -1, i;
u8 buf[FT_ONE_TCH_LEN-2] = { 0 };
u8 reg_addr, pointid = FT_MAX_ID;
for (i = 0; i < event->touch_point && i < MAX_TOUCH_POINTS; i++) {
reg_addr = FT_TOUCH_X_H_REG + (i * FT_ONE_TCH_LEN);
ret = fts_i2c_read(ts_data->client, &reg_addr, 1, buf, FT_ONE_TCH_LEN-2);
if (ret < 0) {
LOG_ERR("read touchdata failed.\n");
return ret;
}
pointid = (buf[FT_TOUCH_ID]) >> 4;
if (pointid >= MAX_TOUCH_POINTS)
break;
event->au8_finger_id[i] = pointid;
event->au16_x[i] = (s16) (buf[FT_TOUCH_X_H] & 0x0F) << 8 | (s16) buf[FT_TOUCH_X_L];
event->au16_y[i] = (s16) (buf[FT_TOUCH_Y_H] & 0x0F) << 8 | (s16) buf[FT_TOUCH_Y_L];
event->au8_touch_event[i] = buf[FT_TOUCH_EVENT] >> 6;
#if XY_REVERSE
event->au16_x[i] = SCREEN_WIDTH - event->au16_x[i] - 1;
event->au16_y[i] = SCREEN_HEIGHT - event->au16_y[i] - 1;
#endif
}
event->pressure = FT_PRESS;
return 0;
}
static void fts_report_value(struct tinker_ft5406_data *ts_data)
{
struct ts_event *event = &ts_data->event;
int i, modified_ids = 0, released_ids;
for (i = 0; i < event->touch_point && i < MAX_TOUCH_POINTS; i++) {
if (event->au8_touch_event[i]== FT_TOUCH_DOWN
|| event->au8_touch_event[i] == FT_TOUCH_CONTACT)
{
modified_ids |= 1 << event->au8_finger_id[i];
input_mt_slot(ts_data->input_dev, event->au8_finger_id[i]);
input_mt_report_slot_state(ts_data->input_dev, MT_TOOL_FINGER,
true);
input_report_abs(ts_data->input_dev, ABS_MT_TOUCH_MAJOR,
event->pressure);
input_report_abs(ts_data->input_dev, ABS_MT_POSITION_X,
event->au16_x[i]);
input_report_abs(ts_data->input_dev, ABS_MT_POSITION_Y,
event->au16_y[i]);
if(!((1 << event->au8_finger_id[i]) & ts_data->known_ids))
LOG_DBG("Touch id-%d: x = %d, y = %d\n",
event->au8_finger_id[i], event->au16_x[i], event->au16_y[i]);
}
}
released_ids = ts_data->known_ids & ~modified_ids;
for(i = 0; released_ids && i < MAX_TOUCH_POINTS; i++) {
if(released_ids & (1<<i)) {
LOG_DBG("Release id-%d, known = %x modified = %x\n", i, ts_data->known_ids, modified_ids);
input_mt_slot(ts_data->input_dev, i);
input_mt_report_slot_state(ts_data->input_dev, MT_TOOL_FINGER, false);
modified_ids &= ~(1 << i);
}
}
ts_data->known_ids = modified_ids;
input_mt_report_pointer_emulation(ts_data->input_dev, true);
input_sync(ts_data->input_dev);
}
extern int tinker_mcu_is_connected(void);
static void tinker_ft5406_work(struct work_struct *work)
{
struct tinker_ft5406_data *ts_data
= container_of(work, struct tinker_ft5406_data, ft5406_work);
struct ts_event *event = &ts_data->event;
int ret = 0, count = 8, td_status;
while(count > 0) {
ret = fts_check_fw_ver(ts_data->client);
if (ret == 0)
break;
LOG_INFO("checking touch ic, countdown: %d\n", count);
msleep(1000);
count--;
}
if (!count) {
LOG_ERR("checking touch ic timeout, %d\n", ret);
return;
}
//polling 60fps
while(1) {
td_status = fts_read_td_status(ts_data);
if (td_status < VALID_TD_STATUS_VAL+1 && (td_status > 0 || ts_data->known_ids != 0)) {
memset(event, -1, sizeof(struct ts_event));
event->touch_point = td_status;
ret = fts_read_touchdata(ts_data);
if (ret == 0)
fts_report_value(ts_data);
}
msleep_interruptible(17);
}
}
static int tinker_ft5406_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tinker_ft5406_data *ts_data;
struct input_dev *input_dev;
int ret = 0, timeout = 10;
LOG_INFO("address = 0x%x\n", client->addr);
ts_data = kzalloc(sizeof(struct tinker_ft5406_data), GFP_KERNEL);
if (ts_data == NULL) {
LOG_ERR("no memory for device\n");
return -ENOMEM;
}
ts_data->client = client;
i2c_set_clientdata(client, ts_data);
while(!tinker_mcu_is_connected() && timeout > 0) {
msleep(50);
timeout--;
}
if (timeout == 0) {
LOG_ERR("wait connected timeout\n");
ret = -ENODEV;
goto timeout_failed;
}
input_dev = input_allocate_device();
if (!input_dev) {
LOG_ERR("failed to allocate input device\n");
goto input_allocate_failed;
}
input_dev->name = "fts_ts";
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &ts_data->client->dev;
ts_data->input_dev = input_dev;
input_set_drvdata(input_dev, ts_data);
__set_bit(EV_SYN, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_mt_init_slots(input_dev, MAX_TOUCH_POINTS, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
SCREEN_WIDTH, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
SCREEN_HEIGHT, 0, 0);
ret = input_register_device(input_dev);
if (ret) {
LOG_ERR("Input device registration failed\n");
goto input_register_failed;
}
INIT_WORK(&ts_data->ft5406_work, tinker_ft5406_work);
schedule_work(&ts_data->ft5406_work);
return 0;
input_register_failed:
input_free_device(input_dev);
input_allocate_failed:
timeout_failed:
kfree(ts_data);
return ret;
}
static int tinker_ft5406_remove(struct i2c_client *client)
{
struct tinker_ft5406_data *ts_data = i2c_get_clientdata(client);
cancel_work_sync(&ts_data->ft5406_work);
if (ts_data->input_dev) {
input_unregister_device(ts_data->input_dev);
input_free_device(ts_data->input_dev);
}
kfree(ts_data);
return 0;
}
static const struct i2c_device_id tinker_ft5406_id[] = {
{"tinker_ft5406", 0},
{},
};
static struct i2c_driver tinker_ft5406_driver = {
.driver = {
.name = "tinker_ft5406",
},
.probe = tinker_ft5406_probe,
.remove = tinker_ft5406_remove,
.id_table = tinker_ft5406_id,
};
module_i2c_driver(tinker_ft5406_driver);
MODULE_DESCRIPTION("TINKER BOARD FT5406 Touch driver");
MODULE_LICENSE("GPL v2");

64
drivers/miniarm/dsi/tinker_ft5406.h Normal file
View File

@@ -0,0 +1,64 @@
#ifndef _TINKER_FT5406_H_
#define _TINKER_FT5406_H_
#define LOG_DBG(fmt,arg...) pr_debug("tinker-ft5406: %s: "fmt, __func__, ##arg);
#define LOG_INFO(fmt,arg...) pr_info("tinker-ft5406: %s: "fmt, __func__, ##arg);
#define LOG_ERR(fmt,arg...) pr_err("tinker-ft5406: %s: "fmt, __func__, ##arg);
#define XY_REVERSE 1
#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 480
#define FT_ONE_TCH_LEN 6
#define FT_REG_FW_VER 0xA6
#define FT_REG_FW_MIN_VER 0xB2
#define FT_REG_FW_SUB_MIN_VER 0xB3
#define VALID_TD_STATUS_VAL 10
#define MAX_TOUCH_POINTS 1
#define FT_PRESS 0x7F
#define FT_MAX_ID 0x0F
#define FT_TOUCH_X_H 0
#define FT_TOUCH_X_L 1
#define FT_TOUCH_Y_H 2
#define FT_TOUCH_Y_L 3
#define FT_TOUCH_EVENT 0
#define FT_TOUCH_ID 2
#define FT_TOUCH_X_H_REG 3
#define FT_TOUCH_X_L_REG 4
#define FT_TOUCH_Y_H_REG 5
#define FT_TOUCH_Y_L_REG 6
#define FT_TD_STATUS_REG 2
#define FT_TOUCH_EVENT_REG 3
#define FT_TOUCH_ID_REG 5
#define FT_TOUCH_DOWN 0
#define FT_TOUCH_CONTACT 2
struct ts_event {
u16 au16_x[MAX_TOUCH_POINTS]; /*x coordinate */
u16 au16_y[MAX_TOUCH_POINTS]; /*y coordinate */
u8 au8_touch_event[MAX_TOUCH_POINTS]; /*touch event: 0:down; 1:up; 2:contact */
u8 au8_finger_id[MAX_TOUCH_POINTS]; /*touch ID */
u16 pressure;
u8 touch_point;
u8 point_num;
};
struct tinker_ft5406_data {
struct device *dev;
struct i2c_client *client;
struct input_dev *input_dev;
struct ts_event event;
struct work_struct ft5406_work;
int known_ids;
};
#endif