919 lines
21 KiB
C
919 lines
21 KiB
C
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/*
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* Driver for Goodix Touchscreens
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*
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* Copyright (c) 2014 Red Hat Inc.
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* Copyright (c) 2015 K. Merker <merker@debian.org>
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*
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* This code is based on gt9xx.c authored by andrew@goodix.com:
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*
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* 2010 - 2012 Goodix Technology.
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; version 2 of the License.
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*/
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#include <linux/kernel.h>
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#include <linux/dmi.h>
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#include <linux/firmware.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/of.h>
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#include <asm/unaligned.h>
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struct goodix_ts_data {
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struct i2c_client *client;
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struct input_dev *input_dev;
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int abs_x_max;
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int abs_y_max;
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bool swapped_x_y;
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bool inverted_x;
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bool inverted_y;
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unsigned int max_touch_num;
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unsigned int int_trigger_type;
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int cfg_len;
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struct gpio_desc *gpiod_int;
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struct gpio_desc *gpiod_rst;
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u16 id;
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u16 version;
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const char *cfg_name;
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struct completion firmware_loading_complete;
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unsigned long irq_flags;
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};
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#define GOODIX_GPIO_INT_NAME "irq"
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#define GOODIX_GPIO_RST_NAME "reset"
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#define GOODIX_MAX_HEIGHT 4096
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#define GOODIX_MAX_WIDTH 4096
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#define GOODIX_INT_TRIGGER 1
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#define GOODIX_CONTACT_SIZE 8
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#define GOODIX_MAX_CONTACTS 10
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#define GOODIX_CONFIG_MAX_LENGTH 240
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#define GOODIX_CONFIG_911_LENGTH 186
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#define GOODIX_CONFIG_967_LENGTH 228
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/* Register defines */
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#define GOODIX_REG_COMMAND 0x8040
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#define GOODIX_CMD_SCREEN_OFF 0x05
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#define GOODIX_READ_COOR_ADDR 0x814E
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#define GOODIX_REG_CONFIG_DATA 0x8047
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#define GOODIX_REG_ID 0x8140
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#define RESOLUTION_LOC 1
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#define MAX_CONTACTS_LOC 5
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#define TRIGGER_LOC 6
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static const unsigned long goodix_irq_flags[] = {
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IRQ_TYPE_EDGE_RISING,
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IRQ_TYPE_EDGE_FALLING,
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IRQ_TYPE_LEVEL_LOW,
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IRQ_TYPE_LEVEL_HIGH,
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};
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/*
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* Those tablets have their coordinates origin at the bottom right
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* of the tablet, as if rotated 180 degrees
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*/
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static const struct dmi_system_id rotated_screen[] = {
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#if defined(CONFIG_DMI) && defined(CONFIG_X86)
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{
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.ident = "Teclast X89",
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.matches = {
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/* tPAD is too generic, also match on bios date */
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DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"),
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DMI_MATCH(DMI_BOARD_NAME, "tPAD"),
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DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"),
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},
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},
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{
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.ident = "Teclast X98 Pro",
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.matches = {
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/*
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* Only match BIOS date, because the manufacturers
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* BIOS does not report the board name at all
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* (sometimes)...
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*/
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DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"),
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DMI_MATCH(DMI_BIOS_DATE, "10/28/2015"),
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},
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},
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{
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.ident = "WinBook TW100",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
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DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
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}
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},
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{
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.ident = "WinBook TW700",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
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DMI_MATCH(DMI_PRODUCT_NAME, "TW700")
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},
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},
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#endif
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{}
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};
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/**
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* goodix_i2c_read - read data from a register of the i2c slave device.
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*
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* @client: i2c device.
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* @reg: the register to read from.
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* @buf: raw write data buffer.
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* @len: length of the buffer to write
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*/
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static int goodix_i2c_read(struct i2c_client *client,
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u16 reg, u8 *buf, int len)
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{
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struct i2c_msg msgs[2];
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u16 wbuf = cpu_to_be16(reg);
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int ret;
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msgs[0].flags = 0;
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msgs[0].addr = client->addr;
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msgs[0].len = 2;
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msgs[0].buf = (u8 *)&wbuf;
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msgs[1].flags = I2C_M_RD;
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msgs[1].addr = client->addr;
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msgs[1].len = len;
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msgs[1].buf = buf;
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ret = i2c_transfer(client->adapter, msgs, 2);
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return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0);
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}
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/**
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* goodix_i2c_write - write data to a register of the i2c slave device.
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*
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* @client: i2c device.
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* @reg: the register to write to.
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* @buf: raw data buffer to write.
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* @len: length of the buffer to write
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*/
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static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf,
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unsigned len)
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{
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u8 *addr_buf;
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struct i2c_msg msg;
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int ret;
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addr_buf = kmalloc(len + 2, GFP_KERNEL);
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if (!addr_buf)
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return -ENOMEM;
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addr_buf[0] = reg >> 8;
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addr_buf[1] = reg & 0xFF;
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memcpy(&addr_buf[2], buf, len);
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msg.flags = 0;
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msg.addr = client->addr;
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msg.buf = addr_buf;
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msg.len = len + 2;
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ret = i2c_transfer(client->adapter, &msg, 1);
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kfree(addr_buf);
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return ret < 0 ? ret : (ret != 1 ? -EIO : 0);
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}
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static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
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{
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return goodix_i2c_write(client, reg, &value, sizeof(value));
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}
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static int goodix_get_cfg_len(u16 id)
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{
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switch (id) {
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case 911:
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case 9271:
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case 9110:
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case 927:
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case 928:
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return GOODIX_CONFIG_911_LENGTH;
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case 912:
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case 967:
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return GOODIX_CONFIG_967_LENGTH;
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default:
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return GOODIX_CONFIG_MAX_LENGTH;
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}
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}
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static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
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{
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int touch_num;
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int error;
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error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, data,
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GOODIX_CONTACT_SIZE + 1);
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if (error) {
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dev_err(&ts->client->dev, "I2C transfer error: %d\n", error);
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return error;
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}
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if (!(data[0] & 0x80))
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return -EAGAIN;
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touch_num = data[0] & 0x0f;
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if (touch_num > ts->max_touch_num)
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return -EPROTO;
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if (touch_num > 1) {
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data += 1 + GOODIX_CONTACT_SIZE;
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error = goodix_i2c_read(ts->client,
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GOODIX_READ_COOR_ADDR +
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1 + GOODIX_CONTACT_SIZE,
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data,
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GOODIX_CONTACT_SIZE * (touch_num - 1));
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if (error)
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return error;
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}
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return touch_num;
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}
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static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data)
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{
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int id = coor_data[0] & 0x0F;
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int input_x = get_unaligned_le16(&coor_data[1]);
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int input_y = get_unaligned_le16(&coor_data[3]);
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int input_w = get_unaligned_le16(&coor_data[5]);
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/* Inversions have to happen before axis swapping */
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if (ts->inverted_x)
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input_x = ts->abs_x_max - input_x;
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if (ts->inverted_y)
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input_y = ts->abs_y_max - input_y;
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if (ts->swapped_x_y)
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swap(input_x, input_y);
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input_mt_slot(ts->input_dev, id);
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input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
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input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x);
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input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y);
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input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
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input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
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}
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/**
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* goodix_process_events - Process incoming events
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*
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* @ts: our goodix_ts_data pointer
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*
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* Called when the IRQ is triggered. Read the current device state, and push
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* the input events to the user space.
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*/
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static void goodix_process_events(struct goodix_ts_data *ts)
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{
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u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
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int touch_num;
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int i;
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touch_num = goodix_ts_read_input_report(ts, point_data);
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if (touch_num < 0)
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return;
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for (i = 0; i < touch_num; i++)
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goodix_ts_report_touch(ts,
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&point_data[1 + GOODIX_CONTACT_SIZE * i]);
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input_mt_sync_frame(ts->input_dev);
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input_sync(ts->input_dev);
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}
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/**
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* goodix_ts_irq_handler - The IRQ handler
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*
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* @irq: interrupt number.
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* @dev_id: private data pointer.
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*/
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static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
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{
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struct goodix_ts_data *ts = dev_id;
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goodix_process_events(ts);
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if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0)
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dev_err(&ts->client->dev, "I2C write end_cmd error\n");
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return IRQ_HANDLED;
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}
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static void goodix_free_irq(struct goodix_ts_data *ts)
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{
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devm_free_irq(&ts->client->dev, ts->client->irq, ts);
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}
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static int goodix_request_irq(struct goodix_ts_data *ts)
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{
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return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
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NULL, goodix_ts_irq_handler,
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ts->irq_flags, ts->client->name, ts);
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}
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/**
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* goodix_check_cfg - Checks if config fw is valid
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*
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* @ts: goodix_ts_data pointer
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* @cfg: firmware config data
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*/
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static int goodix_check_cfg(struct goodix_ts_data *ts,
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const struct firmware *cfg)
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{
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int i, raw_cfg_len;
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u8 check_sum = 0;
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if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) {
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dev_err(&ts->client->dev,
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"The length of the config fw is not correct");
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return -EINVAL;
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}
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raw_cfg_len = cfg->size - 2;
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for (i = 0; i < raw_cfg_len; i++)
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check_sum += cfg->data[i];
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check_sum = (~check_sum) + 1;
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if (check_sum != cfg->data[raw_cfg_len]) {
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dev_err(&ts->client->dev,
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"The checksum of the config fw is not correct");
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return -EINVAL;
|
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}
|
||
|
|
||
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if (cfg->data[raw_cfg_len + 1] != 1) {
|
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dev_err(&ts->client->dev,
|
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"Config fw must have Config_Fresh register set");
|
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return -EINVAL;
|
||
|
}
|
||
|
|
||
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return 0;
|
||
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}
|
||
|
|
||
|
/**
|
||
|
* goodix_send_cfg - Write fw config to device
|
||
|
*
|
||
|
* @ts: goodix_ts_data pointer
|
||
|
* @cfg: config firmware to write to device
|
||
|
*/
|
||
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static int goodix_send_cfg(struct goodix_ts_data *ts,
|
||
|
const struct firmware *cfg)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
error = goodix_check_cfg(ts, cfg);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data,
|
||
|
cfg->size);
|
||
|
if (error) {
|
||
|
dev_err(&ts->client->dev, "Failed to write config data: %d",
|
||
|
error);
|
||
|
return error;
|
||
|
}
|
||
|
dev_dbg(&ts->client->dev, "Config sent successfully.");
|
||
|
|
||
|
/* Let the firmware reconfigure itself, so sleep for 10ms */
|
||
|
usleep_range(10000, 11000);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int goodix_int_sync(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
error = gpiod_direction_output(ts->gpiod_int, 0);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
msleep(50); /* T5: 50ms */
|
||
|
|
||
|
error = gpiod_direction_input(ts->gpiod_int);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_reset - Reset device during power on
|
||
|
*
|
||
|
* @ts: goodix_ts_data pointer
|
||
|
*/
|
||
|
static int goodix_reset(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
/* begin select I2C slave addr */
|
||
|
error = gpiod_direction_output(ts->gpiod_rst, 0);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
msleep(20); /* T2: > 10ms */
|
||
|
|
||
|
/* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */
|
||
|
error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
usleep_range(100, 2000); /* T3: > 100us */
|
||
|
|
||
|
error = gpiod_direction_output(ts->gpiod_rst, 1);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
usleep_range(6000, 10000); /* T4: > 5ms */
|
||
|
|
||
|
/* end select I2C slave addr */
|
||
|
error = gpiod_direction_input(ts->gpiod_rst);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
error = goodix_int_sync(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_get_gpio_config - Get GPIO config from ACPI/DT
|
||
|
*
|
||
|
* @ts: goodix_ts_data pointer
|
||
|
*/
|
||
|
static int goodix_get_gpio_config(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
struct device *dev;
|
||
|
struct gpio_desc *gpiod;
|
||
|
|
||
|
if (!ts->client)
|
||
|
return -EINVAL;
|
||
|
dev = &ts->client->dev;
|
||
|
|
||
|
/* Get the interrupt GPIO pin number */
|
||
|
gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
|
||
|
if (IS_ERR(gpiod)) {
|
||
|
error = PTR_ERR(gpiod);
|
||
|
if (error != -EPROBE_DEFER)
|
||
|
dev_dbg(dev, "Failed to get %s GPIO: %d\n",
|
||
|
GOODIX_GPIO_INT_NAME, error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
ts->gpiod_int = gpiod;
|
||
|
|
||
|
/* Get the reset line GPIO pin number */
|
||
|
gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN);
|
||
|
if (IS_ERR(gpiod)) {
|
||
|
error = PTR_ERR(gpiod);
|
||
|
if (error != -EPROBE_DEFER)
|
||
|
dev_dbg(dev, "Failed to get %s GPIO: %d\n",
|
||
|
GOODIX_GPIO_RST_NAME, error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
ts->gpiod_rst = gpiod;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_read_config - Read the embedded configuration of the panel
|
||
|
*
|
||
|
* @ts: our goodix_ts_data pointer
|
||
|
*
|
||
|
* Must be called during probe
|
||
|
*/
|
||
|
static void goodix_read_config(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
u8 config[GOODIX_CONFIG_MAX_LENGTH];
|
||
|
int error;
|
||
|
|
||
|
error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
|
||
|
config, ts->cfg_len);
|
||
|
if (error) {
|
||
|
dev_warn(&ts->client->dev,
|
||
|
"Error reading config (%d), using defaults\n",
|
||
|
error);
|
||
|
ts->abs_x_max = GOODIX_MAX_WIDTH;
|
||
|
ts->abs_y_max = GOODIX_MAX_HEIGHT;
|
||
|
if (ts->swapped_x_y)
|
||
|
swap(ts->abs_x_max, ts->abs_y_max);
|
||
|
ts->int_trigger_type = GOODIX_INT_TRIGGER;
|
||
|
ts->max_touch_num = GOODIX_MAX_CONTACTS;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]);
|
||
|
ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]);
|
||
|
if (ts->swapped_x_y)
|
||
|
swap(ts->abs_x_max, ts->abs_y_max);
|
||
|
ts->int_trigger_type = config[TRIGGER_LOC] & 0x03;
|
||
|
ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f;
|
||
|
if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) {
|
||
|
dev_err(&ts->client->dev,
|
||
|
"Invalid config, using defaults\n");
|
||
|
ts->abs_x_max = GOODIX_MAX_WIDTH;
|
||
|
ts->abs_y_max = GOODIX_MAX_HEIGHT;
|
||
|
if (ts->swapped_x_y)
|
||
|
swap(ts->abs_x_max, ts->abs_y_max);
|
||
|
ts->max_touch_num = GOODIX_MAX_CONTACTS;
|
||
|
}
|
||
|
|
||
|
if (dmi_check_system(rotated_screen)) {
|
||
|
ts->inverted_x = true;
|
||
|
ts->inverted_y = true;
|
||
|
dev_dbg(&ts->client->dev,
|
||
|
"Applying '180 degrees rotated screen' quirk\n");
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_read_version - Read goodix touchscreen version
|
||
|
*
|
||
|
* @ts: our goodix_ts_data pointer
|
||
|
*/
|
||
|
static int goodix_read_version(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
u8 buf[6];
|
||
|
char id_str[5];
|
||
|
|
||
|
error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
|
||
|
if (error) {
|
||
|
dev_err(&ts->client->dev, "read version failed: %d\n", error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
memcpy(id_str, buf, 4);
|
||
|
id_str[4] = 0;
|
||
|
if (kstrtou16(id_str, 10, &ts->id))
|
||
|
ts->id = 0x1001;
|
||
|
|
||
|
ts->version = get_unaligned_le16(&buf[4]);
|
||
|
|
||
|
dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id,
|
||
|
ts->version);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_i2c_test - I2C test function to check if the device answers.
|
||
|
*
|
||
|
* @client: the i2c client
|
||
|
*/
|
||
|
static int goodix_i2c_test(struct i2c_client *client)
|
||
|
{
|
||
|
int retry = 0;
|
||
|
int error;
|
||
|
u8 test;
|
||
|
|
||
|
while (retry++ < 2) {
|
||
|
error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA,
|
||
|
&test, 1);
|
||
|
if (!error)
|
||
|
return 0;
|
||
|
|
||
|
dev_err(&client->dev, "i2c test failed attempt %d: %d\n",
|
||
|
retry, error);
|
||
|
msleep(20);
|
||
|
}
|
||
|
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_request_input_dev - Allocate, populate and register the input device
|
||
|
*
|
||
|
* @ts: our goodix_ts_data pointer
|
||
|
*
|
||
|
* Must be called during probe
|
||
|
*/
|
||
|
static int goodix_request_input_dev(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
ts->input_dev = devm_input_allocate_device(&ts->client->dev);
|
||
|
if (!ts->input_dev) {
|
||
|
dev_err(&ts->client->dev, "Failed to allocate input device.");
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
|
||
|
0, ts->abs_x_max, 0, 0);
|
||
|
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
|
||
|
0, ts->abs_y_max, 0, 0);
|
||
|
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
|
||
|
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
|
||
|
|
||
|
input_mt_init_slots(ts->input_dev, ts->max_touch_num,
|
||
|
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
|
||
|
|
||
|
ts->input_dev->name = "Goodix Capacitive TouchScreen";
|
||
|
ts->input_dev->phys = "input/ts";
|
||
|
ts->input_dev->id.bustype = BUS_I2C;
|
||
|
ts->input_dev->id.vendor = 0x0416;
|
||
|
ts->input_dev->id.product = ts->id;
|
||
|
ts->input_dev->id.version = ts->version;
|
||
|
|
||
|
error = input_register_device(ts->input_dev);
|
||
|
if (error) {
|
||
|
dev_err(&ts->client->dev,
|
||
|
"Failed to register input device: %d", error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_configure_dev - Finish device initialization
|
||
|
*
|
||
|
* @ts: our goodix_ts_data pointer
|
||
|
*
|
||
|
* Must be called from probe to finish initialization of the device.
|
||
|
* Contains the common initialization code for both devices that
|
||
|
* declare gpio pins and devices that do not. It is either called
|
||
|
* directly from probe or from request_firmware_wait callback.
|
||
|
*/
|
||
|
static int goodix_configure_dev(struct goodix_ts_data *ts)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
ts->swapped_x_y = device_property_read_bool(&ts->client->dev,
|
||
|
"touchscreen-swapped-x-y");
|
||
|
ts->inverted_x = device_property_read_bool(&ts->client->dev,
|
||
|
"touchscreen-inverted-x");
|
||
|
ts->inverted_y = device_property_read_bool(&ts->client->dev,
|
||
|
"touchscreen-inverted-y");
|
||
|
|
||
|
goodix_read_config(ts);
|
||
|
|
||
|
error = goodix_request_input_dev(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
|
||
|
error = goodix_request_irq(ts);
|
||
|
if (error) {
|
||
|
dev_err(&ts->client->dev, "request IRQ failed: %d\n", error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* goodix_config_cb - Callback to finish device init
|
||
|
*
|
||
|
* @ts: our goodix_ts_data pointer
|
||
|
*
|
||
|
* request_firmware_wait callback that finishes
|
||
|
* initialization of the device.
|
||
|
*/
|
||
|
static void goodix_config_cb(const struct firmware *cfg, void *ctx)
|
||
|
{
|
||
|
struct goodix_ts_data *ts = ctx;
|
||
|
int error;
|
||
|
|
||
|
if (cfg) {
|
||
|
/* send device configuration to the firmware */
|
||
|
error = goodix_send_cfg(ts, cfg);
|
||
|
if (error)
|
||
|
goto err_release_cfg;
|
||
|
}
|
||
|
|
||
|
goodix_configure_dev(ts);
|
||
|
|
||
|
err_release_cfg:
|
||
|
release_firmware(cfg);
|
||
|
complete_all(&ts->firmware_loading_complete);
|
||
|
}
|
||
|
|
||
|
static int goodix_ts_probe(struct i2c_client *client,
|
||
|
const struct i2c_device_id *id)
|
||
|
{
|
||
|
struct goodix_ts_data *ts;
|
||
|
int error;
|
||
|
|
||
|
dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
|
||
|
|
||
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
||
|
dev_err(&client->dev, "I2C check functionality failed.\n");
|
||
|
return -ENXIO;
|
||
|
}
|
||
|
|
||
|
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
|
||
|
if (!ts)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
ts->client = client;
|
||
|
i2c_set_clientdata(client, ts);
|
||
|
init_completion(&ts->firmware_loading_complete);
|
||
|
|
||
|
error = goodix_get_gpio_config(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
if (ts->gpiod_int && ts->gpiod_rst) {
|
||
|
/* reset the controller */
|
||
|
error = goodix_reset(ts);
|
||
|
if (error) {
|
||
|
dev_err(&client->dev, "Controller reset failed.\n");
|
||
|
return error;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
error = goodix_i2c_test(client);
|
||
|
if (error) {
|
||
|
dev_err(&client->dev, "I2C communication failure: %d\n", error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
error = goodix_read_version(ts);
|
||
|
if (error) {
|
||
|
dev_err(&client->dev, "Read version failed.\n");
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
ts->cfg_len = goodix_get_cfg_len(ts->id);
|
||
|
|
||
|
if (ts->gpiod_int && ts->gpiod_rst) {
|
||
|
/* update device config */
|
||
|
ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL,
|
||
|
"goodix_%d_cfg.bin", ts->id);
|
||
|
if (!ts->cfg_name)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name,
|
||
|
&client->dev, GFP_KERNEL, ts,
|
||
|
goodix_config_cb);
|
||
|
if (error) {
|
||
|
dev_err(&client->dev,
|
||
|
"Failed to invoke firmware loader: %d\n",
|
||
|
error);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
} else {
|
||
|
error = goodix_configure_dev(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int goodix_ts_remove(struct i2c_client *client)
|
||
|
{
|
||
|
struct goodix_ts_data *ts = i2c_get_clientdata(client);
|
||
|
|
||
|
if (ts->gpiod_int && ts->gpiod_rst)
|
||
|
wait_for_completion(&ts->firmware_loading_complete);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __maybe_unused goodix_suspend(struct device *dev)
|
||
|
{
|
||
|
struct i2c_client *client = to_i2c_client(dev);
|
||
|
struct goodix_ts_data *ts = i2c_get_clientdata(client);
|
||
|
int error;
|
||
|
|
||
|
/* We need gpio pins to suspend/resume */
|
||
|
if (!ts->gpiod_int || !ts->gpiod_rst) {
|
||
|
disable_irq(client->irq);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
wait_for_completion(&ts->firmware_loading_complete);
|
||
|
|
||
|
/* Free IRQ as IRQ pin is used as output in the suspend sequence */
|
||
|
goodix_free_irq(ts);
|
||
|
|
||
|
/* Output LOW on the INT pin for 5 ms */
|
||
|
error = gpiod_direction_output(ts->gpiod_int, 0);
|
||
|
if (error) {
|
||
|
goodix_request_irq(ts);
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
usleep_range(5000, 6000);
|
||
|
|
||
|
error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
|
||
|
GOODIX_CMD_SCREEN_OFF);
|
||
|
if (error) {
|
||
|
dev_err(&ts->client->dev, "Screen off command failed\n");
|
||
|
gpiod_direction_input(ts->gpiod_int);
|
||
|
goodix_request_irq(ts);
|
||
|
return -EAGAIN;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* The datasheet specifies that the interval between sending screen-off
|
||
|
* command and wake-up should be longer than 58 ms. To avoid waking up
|
||
|
* sooner, delay 58ms here.
|
||
|
*/
|
||
|
msleep(58);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int __maybe_unused goodix_resume(struct device *dev)
|
||
|
{
|
||
|
struct i2c_client *client = to_i2c_client(dev);
|
||
|
struct goodix_ts_data *ts = i2c_get_clientdata(client);
|
||
|
int error;
|
||
|
|
||
|
if (!ts->gpiod_int || !ts->gpiod_rst) {
|
||
|
enable_irq(client->irq);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Exit sleep mode by outputting HIGH level to INT pin
|
||
|
* for 2ms~5ms.
|
||
|
*/
|
||
|
error = gpiod_direction_output(ts->gpiod_int, 1);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
usleep_range(2000, 5000);
|
||
|
|
||
|
error = goodix_int_sync(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
error = goodix_request_irq(ts);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume);
|
||
|
|
||
|
static const struct i2c_device_id goodix_ts_id[] = {
|
||
|
{ "GDIX1001:00", 0 },
|
||
|
{ }
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
|
||
|
|
||
|
#ifdef CONFIG_ACPI
|
||
|
static const struct acpi_device_id goodix_acpi_match[] = {
|
||
|
{ "GDIX1001", 0 },
|
||
|
{ "GDIX1002", 0 },
|
||
|
{ }
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
|
||
|
#endif
|
||
|
|
||
|
#ifdef CONFIG_OF
|
||
|
static const struct of_device_id goodix_of_match[] = {
|
||
|
{ .compatible = "goodix,gt911" },
|
||
|
{ .compatible = "goodix,gt9110" },
|
||
|
{ .compatible = "goodix,gt912" },
|
||
|
{ .compatible = "goodix,gt927" },
|
||
|
{ .compatible = "goodix,gt9271" },
|
||
|
{ .compatible = "goodix,gt928" },
|
||
|
{ .compatible = "goodix,gt967" },
|
||
|
{ }
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(of, goodix_of_match);
|
||
|
#endif
|
||
|
|
||
|
static struct i2c_driver goodix_ts_driver = {
|
||
|
.probe = goodix_ts_probe,
|
||
|
.remove = goodix_ts_remove,
|
||
|
.id_table = goodix_ts_id,
|
||
|
.driver = {
|
||
|
.name = "Goodix-TS",
|
||
|
.acpi_match_table = ACPI_PTR(goodix_acpi_match),
|
||
|
.of_match_table = of_match_ptr(goodix_of_match),
|
||
|
.pm = &goodix_pm_ops,
|
||
|
},
|
||
|
};
|
||
|
module_i2c_driver(goodix_ts_driver);
|
||
|
|
||
|
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
|
||
|
MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
|
||
|
MODULE_DESCRIPTION("Goodix touchscreen driver");
|
||
|
MODULE_LICENSE("GPL v2");
|