本帖最后由 17701603601 于 2019-8-3 11:17 编辑
基于rk3288平台的gt9xx 触摸驱动移植
一、硬件介绍：
1 core-rk3288j 核心板
2 外接lvds 1280*480的屏幕
3 触摸芯片GT928，I2C驱动，触摸驱动发布版本和时间* Version: 2.4 * Release Date: 2014/11/28 */
4 操作系统Ubuntu16.04
二、触摸芯片硬件电路描述
1 触摸零点右上角
2 触摸尺寸 1280*480
3 中断下降沿触发；
4 I2C1 接口
如：
GTP_INT GPIO7_A6 <&gpio7 6 GPIO_ACTIVE_HIGH>;
GTP_RST GPIO7_A5 <&gpio7 5 GPIO_ACTIVE_LOW>
I2C1_SDA
I2C1_SCL
三、开启驱动移植
1 dts 配置硬件
&i2c1 {
status = "okay";
goodix_ts@5d {
compatible = "goodix,gt9xx";
reg = <0x5d>;
interrupt-parent = <&gpio7>;
interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
goodix,rst-gpio = <&gpio7 5 GPIO_ACTIVE_LOW>;
goodix,irq-gpio = <&gpio7 6 GPIO_ACTIVE_HIGH>;
goodix,cfg-group2 = [
41 E0 01 00 05 05 05 00 02 08 28
05 5A 3C 03 05 00 00 00 00 00 00
00 00 00 00 00 90 30 66 36 2D 05
0D 00 00 00 00 03 25 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
00 00 00 01 04 05 06 07 08 09 0C
0D 0E 0F FF FF FF FF FF FF FF FF
FF FF FF FF 00 00 00 00 00 00 2A
29 28 27 26 25 24 23 22 21 20 1F
1E 1C 1B 19 14 13 12 11 10 0F 0E
0D 0C 0A 08 07 06 04 02 00 00 00
00 00 00 00 00 00 00 00 0C 01];
};
};
2 gt9xx.h 文件配置修改
放在最前面的：
on/off 开启/关闭配置
1 打开 GTP_CUSTOM_CFG 需要配置成1，用来用户自定义设置；
2 打开GTP_DRIVER_SEND_CFG 需要配置成1 ，用来发送CFG文件配置；
3 打开GTP_DEBUG_ON 可以看到配置成1 ，可以看到调试信息；
例如：
//***************************PART1:ON/OFF define*******************************
#define GTP_CUSTOM_CFG 1
#define GTP_CHANGE_X2Y 0 //swap x y
#define GTP_DRIVER_SEND_CFG 1 //driver send config
#define GTP_HAVE_TOUCH_KEY 0
#define GTP_POWER_CTRL_SLEEP 0 //power off when suspend
#define GTP_ICS_SLOT_REPORT 0 // slot protocol
#define GTP_AUTO_UPDATE 0 // auto update fw by .bin file as default
#define GTP_HEADER_FW_UPDATE 0 // auto update fw by gtp_default_FW in gt9xx_firmware.h, function together with
GTP_AUTO_UPDATE
#define GTP_AUTO_UPDATE_CFG 0 // auto update config by .cfg file, function together with GTP_AUTO_UPDATE
#define GTP_COMPATIBLE_MODE 0 // compatible with GT9XXF
#define GTP_CREATE_WR_NODE 0
#define GTP_ESD_PROTECT 0 // esd protection with a cycle of 2 seconds
#define GTP_WITH_PEN 0
#define GTP_PEN_HAVE_BUTTON 0 // active pen has buttons, function together with GTP_WITH_PEN
#define GTP_GESTURE_WAKEUP 0 // gesture wakeup
#define GTP_DEBUG_ON 1
#define GTP_DEBUG_ARRAY_ON 0
#define GTP_DEBUG_FUNC_ON 0
#if GTP_COMPATIBLE_MODE
第一步：：
//*************************** PART2:TODO define **********************************
// STEP_1(REQUIRED): Define Configuration Information Group(s)
// Sensor_ID Map:
/* sensor_opt1 sensor_opt2 Sensor_ID
GND GND 0
VDDIO GND 1
NC GND 2
GND NC/300K 3
VDDIO NC/300K 4
NC NC/300K 5
*/
// TODO: define your own default or for Sensor_ID == 0 config here.
// The predefined one is just a sample config, which is not suitable for your tp in most cases.
#define CTP_CFG_GROUP0 {\
}
// TODO: define your config for Sensor_ID == 1 here, if needed
#define CTP_CFG_GROUP1 {\
}
// TODO: define your config for Sensor_ID == 2 here, if needed
#define CTP_CFG_GROUP2 {\
0x41,0xE0,0x01,0x00,0x05,0x05,0x05,0x00,0x02,0x08,0x28,\
0x05,0x5A,0x3C,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x90,0x30,0x66,0x36,0x2D,0x05,\
0x0D,0x00,0x00,0x00,0x00,0x03,0x25,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x01,0x04,0x05,0x06,0x07,0x08,0x09,0x0C,\
0x0D,0x0E,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,\
0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x2A,\
0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,0x1F,\
0x1E,0x1C,0x1B,0x19,0x14,0x13,0x12,0x11,0x10,0x0F,0x0E,\
0x0D,0x0C,0x0A,0x08,0x07,0x06,0x04,0x02,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0C,0x01\
}
// TODO: define your config for Sensor_ID == 3 here, if needed
#define CTP_CFG_GROUP3 {\
}
// TODO: define your config for Sensor_ID == 4 here, if needed
#define CTP_CFG_GROUP4 {\
}
// TODO: define your config for Sensor_ID == 5 here, if needed
#define CTP_CFG_GROUP5 {\
}
第二步：设置中断和复位引脚
// STEP_2(REQUIRED): Customize your I/O ports & I/O operations
#define GTP_RST_PORT 5//S5PV210_GPJ3(6)
#define GTP_INT_PORT 6//S5PV210_GPH1(3)
第三步：设置触摸区域和下降沿触发
// STEP_3(optional): Specify your special config info if needed
#if GTP_CUSTOM_CFG
#define GTP_MAX_HEIGHT 480
#define GTP_MAX_WIDTH 1280
#define GTP_INT_TRIGGER 1 // 0: Rising 1: Falling
四、总结及问题汇总
1 触摸不灵或者不准的问题，需要厂家给CFG文件，修改gt9xx.h 文件，不是必须修改dts文件，需要把宏GTP_DRIVER_SEND_CFG 配置成1。
格式内容如下：
#define CTP_CFG_GROUP2 {\
0x41,0x00,0x05,0xE0,0x01,0x05,0x0D,0x00,0x02,0x08,0x28,\
0x05,0x5A,0x3C,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x90,0x30,0x66,0x36,0x2D,0x05,\
0x0D,0x00,0x00,0x00,0x00,0x03,0x25,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\
0x00,0x00,0x0F,0x0E,0x0D,0x0C,0x09,0x08,0x07,0x06,0x05,\
0x04,0x01,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,\
0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x2A,\
0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,0x1F,\
0x1E,0x1C,0x1B,0x19,0x14,0x13,0x12,0x11,0x10,0x0F,0x0E,\
0x0D,0x0C,0x0A,0x08,0x07,0x06,0x04,0x02,0x00,0x00,0x00,\
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x01\
}
2 厂家 有指定也就是的sensorID， 配置到哪个group 是厂家指定的，比如有0-5,6个group，我的配置在了group2；
#define CTP_CFG_GROUP2
3 debug信息如下：
正确的
[ 2.596431] <<-GTP-DEBUG->> [2356]GTP power on.
[ 2.596491] <<-GTP-INFO->> Guitar reset
[ 2.735657] <<-GTP-INFO->> IC Version: 928_1040
[ 2.738181] <<-GTP-INFO->> Sensor_ID: 2
[ 2.738186] <<-GTP-DEBUG->> [1394]Get config data from device tree.
[ 2.738196] <<-GTP-INFO->> Config group2 used,length: 186
[ 2.739467] <<-GTP-DEBUG->> [1430]Config Version: 65, 0x41; IC Config Version: 65, 0x41
[ 2.739473] <<-GTP-INFO->> Driver send config.
[ 2.765064] <<-GTP-INFO->> X_MAX: 1280, Y_MAX: 480, TRIGGER: 0x01
[ 2.783848] <<-GTP-INFO->> create proc entry gt9xx_config success
[ 2.784195] input: goodix-ts as /devices/virtual/input/input1
[ 2.784497] <<-GTP-DEBUG->> [1746]INT trigger type:1
如果遇到如下debug信息，一般onfig data解析错误，GTP init panel failed.一般就是cfg文件没设置好，询问厂家技术支持放置在group0-group5的哪个里面。
[ 2.585428] <<-GTP-DEBUG->> [2356]GTP power on.
[ 2.585488] <<-GTP-INFO->> Guitar reset
[ 2.725369] <<-GTP-INFO->> IC Version: 928_1040
[ 2.727878] <<-GTP-INFO->> Sensor_ID: 2
[ 2.727883] <<-GTP-DEBUG->> [1394]Get config data from device tree.
[ 2.727891] <<-GTP-ERROR->> Failed to parse config data form device tree.
[ 2.727893] <<-GTP-ERROR->> GTP init panel failed.
[ 2.727914] <<-GTP-INFO->> create proc entry gt9xx_config success
[ 2.728268] input: goodix-ts as /devices/virtual/input/input1
[ 2.728591] <<-GTP-DEBUG->> [1746]INT trigger type:1
[ 2.728674] <<-GTP-INFO->> GTP works in interrupt mode.
4 移植的时候需要定义个宏：
#define GTP_CONFIG_OF
这个宏非常关键，在gt9xx.c 文件头部位置，定义上去！ 否则驱动无法正常执行。
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