// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Goodix Touchscreens
*
* Copyright (c) 2014 Red Hat Inc.
* Copyright (c) 2015 K. Merker <merker@debian.org>
*
* This code is based on gt9xx.c authored by andrew@goodix.com:
*
* 2010 - 2012 Goodix Technology.
*/
#include <linux/kernel.h>
#include <linux/dmi.h>
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <asm/unaligned.h>
struct goodix_ts_data;
struct goodix_chip_data {
u16 config_addr;
int config_len;
int (*check_config)(struct goodix_ts_data *, const struct firmware *);
};
struct goodix_ts_data {
struct i2c_client *client;
struct input_dev *input_dev;
const struct goodix_chip_data *chip;
struct touchscreen_properties prop;
unsigned int max_touch_num;
unsigned int int_trigger_type;
struct regulator *avdd28;
struct regulator *vddio;
struct gpio_desc *gpiod_int;
struct gpio_desc *gpiod_rst;
u16 id;
u16 version;
const char *cfg_name;
struct completion firmware_loading_complete;
unsigned long irq_flags;
unsigned int contact_size;
};
#define GOODIX_GPIO_INT_NAME "irq"
#define GOODIX_GPIO_RST_NAME "reset"
#define GOODIX_MAX_HEIGHT 4096
#define GOODIX_MAX_WIDTH 4096
#define GOODIX_INT_TRIGGER 1
#define GOODIX_CONTACT_SIZE 8
#define GOODIX_MAX_CONTACT_SIZE 9
#define GOODIX_MAX_CONTACTS 10
#define GOODIX_CONFIG_MAX_LENGTH 240
#define GOODIX_CONFIG_911_LENGTH 186
#define GOODIX_CONFIG_967_LENGTH 228
/* Register defines */
#define GOODIX_REG_COMMAND 0x8040
#define GOODIX_CMD_SCREEN_OFF 0x05
#define GOODIX_READ_COOR_ADDR 0x814E
#define GOODIX_GT1X_REG_CONFIG_DATA 0x8050
#define GOODIX_GT9X_REG_CONFIG_DATA 0x8047
#define GOODIX_REG_ID 0x8140
#define GOODIX_BUFFER_STATUS_READY BIT(7)
#define GOODIX_BUFFER_STATUS_TIMEOUT 20
#define RESOLUTION_LOC 1
#define MAX_CONTACTS_LOC 5
#define TRIGGER_LOC 6
static int goodix_check_cfg_8(struct goodix_ts_data *ts,
const struct firmware *cfg);
static int goodix_check_cfg_16(struct goodix_ts_data *ts,
const struct firmware *cfg);
static const struct goodix_chip_data gt1x_chip_data = {
.config_addr = GOODIX_GT1X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_MAX_LENGTH,
.check_config = goodix_check_cfg_16,
};
static const struct goodix_chip_data gt911_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_911_LENGTH,
.check_config = goodix_check_cfg_8,
};
static const struct goodix_chip_data gt967_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_967_LENGTH,
.check_config = goodix_check_cfg_8,
};
static const struct goodix_chip_data gt9x_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_MAX_LENGTH,
.check_config = goodix_check_cfg_8,
};
static const unsigned long goodix_irq_flags[] = {
IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_EDGE_FALLING,
IRQ_TYPE_LEVEL_LOW,
IRQ_TYPE_LEVEL_HIGH,
};
/*
* Those tablets have their coordinates origin at the bottom right
* of the tablet, as if rotated 180 degrees
*/
static const struct dmi_system_id rotated_screen[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
.ident = "Teclast X89",
.matches = {
/* tPAD is too generic, also match on bios date */
DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"),
DMI_MATCH(DMI_BOARD_NAME, "tPAD"),
DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"),
},
},
{
.ident = "WinBook TW100",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
}
},
{
.ident = "WinBook TW700",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
DMI_MATCH(DMI_PRODUCT_NAME, "TW700")
},
},
#endif
{}
};
static const struct dmi_system_id nine_bytes_report[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
.ident = "Lenovo YogaBook",
/* YB1-X91L/F and YB1-X90L/F */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9")
}
},