691 lines
15 KiB
C
691 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ILITEK Touch IC driver for 23XX, 25XX and Lego series
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*
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* Copyright (C) 2011 ILI Technology Corporation.
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* Copyright (C) 2020 Luca Hsu <luca_hsu@ilitek.com>
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* Copyright (C) 2021 Joe Hung <joe_hung@ilitek.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/errno.h>
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#include <linux/acpi.h>
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#include <linux/input/touchscreen.h>
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#include <asm/unaligned.h>
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#define ILITEK_TS_NAME "ilitek_ts"
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#define BL_V1_8 0x108
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#define BL_V1_7 0x107
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#define BL_V1_6 0x106
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#define ILITEK_TP_CMD_GET_TP_RES 0x20
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#define ILITEK_TP_CMD_GET_SCRN_RES 0x21
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#define ILITEK_TP_CMD_SET_IC_SLEEP 0x30
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#define ILITEK_TP_CMD_SET_IC_WAKE 0x31
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#define ILITEK_TP_CMD_GET_FW_VER 0x40
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#define ILITEK_TP_CMD_GET_PRL_VER 0x42
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#define ILITEK_TP_CMD_GET_MCU_VER 0x61
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#define ILITEK_TP_CMD_GET_IC_MODE 0xC0
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#define REPORT_COUNT_ADDRESS 61
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#define ILITEK_SUPPORT_MAX_POINT 40
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struct ilitek_protocol_info {
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u16 ver;
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u8 ver_major;
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};
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struct ilitek_ts_data {
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struct i2c_client *client;
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struct gpio_desc *reset_gpio;
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struct input_dev *input_dev;
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struct touchscreen_properties prop;
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const struct ilitek_protocol_map *ptl_cb_func;
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struct ilitek_protocol_info ptl;
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char product_id[30];
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u16 mcu_ver;
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u8 ic_mode;
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u8 firmware_ver[8];
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s32 reset_time;
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s32 screen_max_x;
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s32 screen_max_y;
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s32 screen_min_x;
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s32 screen_min_y;
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s32 max_tp;
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};
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struct ilitek_protocol_map {
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u16 cmd;
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const char *name;
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int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf);
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};
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enum ilitek_cmds {
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/* common cmds */
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GET_PTL_VER = 0,
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GET_FW_VER,
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GET_SCRN_RES,
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GET_TP_RES,
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GET_IC_MODE,
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GET_MCU_VER,
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SET_IC_SLEEP,
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SET_IC_WAKE,
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/* ALWAYS keep at the end */
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MAX_CMD_CNT
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};
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/* ILITEK I2C R/W APIs */
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static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts,
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u8 *cmd, int write_len, int delay,
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u8 *data, int read_len)
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{
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int error;
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struct i2c_client *client = ts->client;
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = write_len,
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.buf = cmd,
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},
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = read_len,
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.buf = data,
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},
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};
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if (delay == 0 && write_len > 0 && read_len > 0) {
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error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (error < 0)
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return error;
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} else {
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if (write_len > 0) {
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error = i2c_transfer(client->adapter, msgs, 1);
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if (error < 0)
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return error;
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}
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if (delay > 0)
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mdelay(delay);
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if (read_len > 0) {
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error = i2c_transfer(client->adapter, msgs + 1, 1);
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if (error < 0)
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return error;
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}
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}
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return 0;
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}
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/* ILITEK ISR APIs */
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static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id,
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unsigned int x, unsigned int y)
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{
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struct input_dev *input = ts->input_dev;
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input_mt_slot(input, id);
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input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
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touchscreen_report_pos(input, &ts->prop, x, y, true);
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}
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static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
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{
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int error = 0;
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u8 buf[512];
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int packet_len = 5;
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int packet_max_point = 10;
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int report_max_point;
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int i, count;
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struct input_dev *input = ts->input_dev;
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struct device *dev = &ts->client->dev;
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unsigned int x, y, status, id;
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error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);
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if (error) {
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dev_err(dev, "get touch info failed, err:%d\n", error);
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goto err_sync_frame;
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}
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report_max_point = buf[REPORT_COUNT_ADDRESS];
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if (report_max_point > ts->max_tp) {
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dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
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report_max_point, ts->max_tp);
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error = -EINVAL;
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goto err_sync_frame;
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}
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count = DIV_ROUND_UP(report_max_point, packet_max_point);
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for (i = 1; i < count; i++) {
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error = ilitek_i2c_write_and_read(ts, NULL, 0, 0,
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buf + i * 64, 64);
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if (error) {
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dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",
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count, error);
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goto err_sync_frame;
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}
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}
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for (i = 0; i < report_max_point; i++) {
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status = buf[i * packet_len + 1] & 0x40;
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if (!status)
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continue;
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id = buf[i * packet_len + 1] & 0x3F;
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x = get_unaligned_le16(buf + i * packet_len + 2);
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y = get_unaligned_le16(buf + i * packet_len + 4);
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if (x > ts->screen_max_x || x < ts->screen_min_x ||
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y > ts->screen_max_y || y < ts->screen_min_y) {
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dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n",
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ts->screen_min_x, x, ts->screen_max_x,
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ts->screen_min_y, y, ts->screen_max_y);
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continue;
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}
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ilitek_touch_down(ts, id, x, y);
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}
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err_sync_frame:
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input_mt_sync_frame(input);
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input_sync(input);
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return error;
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}
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/* APIs of cmds for ILITEK Touch IC */
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static int api_protocol_set_cmd(struct ilitek_ts_data *ts,
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u16 idx, u8 *inbuf, u8 *outbuf)
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{
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u16 cmd;
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int error;
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if (idx >= MAX_CMD_CNT)
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return -EINVAL;
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cmd = ts->ptl_cb_func[idx].cmd;
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error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf);
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if (error)
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return error;
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return 0;
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}
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static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3);
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if (error)
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return error;
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ts->ptl.ver = get_unaligned_be16(outbuf);
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ts->ptl.ver_major = outbuf[0];
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return 0;
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}
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static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32);
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if (error)
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return error;
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ts->mcu_ver = get_unaligned_le16(outbuf);
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memset(ts->product_id, 0, sizeof(ts->product_id));
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memcpy(ts->product_id, outbuf + 6, 26);
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return 0;
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}
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static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
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if (error)
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return error;
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memcpy(ts->firmware_ver, outbuf, 8);
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return 0;
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}
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static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
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if (error)
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return error;
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ts->screen_min_x = get_unaligned_le16(outbuf);
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ts->screen_min_y = get_unaligned_le16(outbuf + 2);
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ts->screen_max_x = get_unaligned_le16(outbuf + 4);
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ts->screen_max_y = get_unaligned_le16(outbuf + 6);
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return 0;
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}
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static int api_protocol_get_tp_res(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15);
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if (error)
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return error;
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ts->max_tp = outbuf[8];
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if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) {
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dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n",
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ts->max_tp);
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return -EINVAL;
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}
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return 0;
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}
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static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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int error;
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u8 buf[64];
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buf[0] = cmd;
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error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2);
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if (error)
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return error;
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ts->ic_mode = outbuf[0];
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return 0;
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}
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static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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u8 buf[64];
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buf[0] = cmd;
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return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
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}
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static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts,
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u16 cmd, u8 *inbuf, u8 *outbuf)
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{
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u8 buf[64];
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buf[0] = cmd;
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return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
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}
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static const struct ilitek_protocol_map ptl_func_map[] = {
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/* common cmds */
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[GET_PTL_VER] = {
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ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
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api_protocol_get_ptl_ver
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},
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[GET_FW_VER] = {
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ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
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api_protocol_get_fw_ver
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},
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[GET_SCRN_RES] = {
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ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
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api_protocol_get_scrn_res
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},
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[GET_TP_RES] = {
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ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
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api_protocol_get_tp_res
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},
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[GET_IC_MODE] = {
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ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
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api_protocol_get_ic_mode
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},
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[GET_MCU_VER] = {
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ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
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api_protocol_get_mcu_ver
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},
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[SET_IC_SLEEP] = {
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ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
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api_protocol_set_ic_sleep
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},
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[SET_IC_WAKE] = {
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ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
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api_protocol_set_ic_wake
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},
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};
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/* Probe APIs */
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static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
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{
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if (ts->reset_gpio) {
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gpiod_set_value(ts->reset_gpio, 1);
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mdelay(10);
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gpiod_set_value(ts->reset_gpio, 0);
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mdelay(delay);
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}
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}
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static int ilitek_protocol_init(struct ilitek_ts_data *ts)
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{
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int error;
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u8 outbuf[64];
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ts->ptl_cb_func = ptl_func_map;
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ts->reset_time = 600;
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error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
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if (error)
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return error;
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/* Protocol v3 is not support currently */
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if (ts->ptl.ver_major == 0x3 ||
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ts->ptl.ver == BL_V1_6 ||
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ts->ptl.ver == BL_V1_7)
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return -EINVAL;
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return 0;
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}
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static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot)
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{
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u8 outbuf[256];
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int error;
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error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
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if (error)
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return error;
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error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf);
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if (error)
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return error;
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error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf);
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if (error)
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return error;
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if (boot) {
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error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL,
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outbuf);
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if (error)
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return error;
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}
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error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf);
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if (error)
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return error;
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error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf);
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if (error)
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return error;
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return 0;
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}
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static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts)
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{
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int error;
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struct input_dev *input;
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input = devm_input_allocate_device(dev);
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if (!input)
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return -ENOMEM;
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ts->input_dev = input;
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input->name = ILITEK_TS_NAME;
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input->id.bustype = BUS_I2C;
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__set_bit(INPUT_PROP_DIRECT, input->propbit);
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input_set_abs_params(input, ABS_MT_POSITION_X,
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ts->screen_min_x, ts->screen_max_x, 0, 0);
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input_set_abs_params(input, ABS_MT_POSITION_Y,
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ts->screen_min_y, ts->screen_max_y, 0, 0);
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touchscreen_parse_properties(input, true, &ts->prop);
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error = input_mt_init_slots(input, ts->max_tp,
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INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
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if (error) {
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dev_err(dev, "initialize MT slots failed, err:%d\n", error);
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return error;
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}
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error = input_register_device(input);
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if (error) {
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dev_err(dev, "register input device failed, err:%d\n", error);
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return error;
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}
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return 0;
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}
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static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
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{
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struct ilitek_ts_data *ts = dev_id;
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int error;
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error = ilitek_process_and_report_v6(ts);
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if (error < 0) {
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dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error);
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return IRQ_NONE;
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}
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return IRQ_HANDLED;
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}
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static ssize_t firmware_version_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct ilitek_ts_data *ts = i2c_get_clientdata(client);
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return scnprintf(buf, PAGE_SIZE,
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"fw version: [%02X%02X.%02X%02X.%02X%02X.%02X%02X]\n",
|
|
ts->firmware_ver[0], ts->firmware_ver[1],
|
|
ts->firmware_ver[2], ts->firmware_ver[3],
|
|
ts->firmware_ver[4], ts->firmware_ver[5],
|
|
ts->firmware_ver[6], ts->firmware_ver[7]);
|
|
}
|
|
static DEVICE_ATTR_RO(firmware_version);
|
|
|
|
static ssize_t product_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
return scnprintf(buf, PAGE_SIZE, "product id: [%04X], module: [%s]\n",
|
|
ts->mcu_ver, ts->product_id);
|
|
}
|
|
static DEVICE_ATTR_RO(product_id);
|
|
|
|
static struct attribute *ilitek_sysfs_attrs[] = {
|
|
&dev_attr_firmware_version.attr,
|
|
&dev_attr_product_id.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group ilitek_attrs_group = {
|
|
.attrs = ilitek_sysfs_attrs,
|
|
};
|
|
|
|
static int ilitek_ts_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct ilitek_ts_data *ts;
|
|
struct device *dev = &client->dev;
|
|
int error;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
|
dev_err(dev, "i2c check functionality failed\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
|
|
if (!ts)
|
|
return -ENOMEM;
|
|
|
|
ts->client = client;
|
|
i2c_set_clientdata(client, ts);
|
|
|
|
ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(ts->reset_gpio)) {
|
|
error = PTR_ERR(ts->reset_gpio);
|
|
dev_err(dev, "request gpiod failed: %d", error);
|
|
return error;
|
|
}
|
|
|
|
ilitek_reset(ts, 1000);
|
|
|
|
error = ilitek_protocol_init(ts);
|
|
if (error) {
|
|
dev_err(dev, "protocol init failed: %d", error);
|
|
return error;
|
|
}
|
|
|
|
error = ilitek_read_tp_info(ts, true);
|
|
if (error) {
|
|
dev_err(dev, "read tp info failed: %d", error);
|
|
return error;
|
|
}
|
|
|
|
error = ilitek_input_dev_init(dev, ts);
|
|
if (error) {
|
|
dev_err(dev, "input dev init failed: %d", error);
|
|
return error;
|
|
}
|
|
|
|
error = devm_request_threaded_irq(dev, ts->client->irq,
|
|
NULL, ilitek_i2c_isr, IRQF_ONESHOT,
|
|
"ilitek_touch_irq", ts);
|
|
if (error) {
|
|
dev_err(dev, "request threaded irq failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = devm_device_add_group(dev, &ilitek_attrs_group);
|
|
if (error) {
|
|
dev_err(dev, "sysfs create group failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused ilitek_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
|
|
int error;
|
|
|
|
disable_irq(client->irq);
|
|
|
|
if (!device_may_wakeup(dev)) {
|
|
error = api_protocol_set_cmd(ts, SET_IC_SLEEP, NULL, NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused ilitek_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
|
|
int error;
|
|
|
|
if (!device_may_wakeup(dev)) {
|
|
error = api_protocol_set_cmd(ts, SET_IC_WAKE, NULL, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
ilitek_reset(ts, ts->reset_time);
|
|
}
|
|
|
|
enable_irq(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
|
|
|
|
static const struct i2c_device_id ilitek_ts_i2c_id[] = {
|
|
{ ILITEK_TS_NAME, 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id ilitekts_acpi_id[] = {
|
|
{ "ILTK0001", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
|
|
#endif
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id ilitek_ts_i2c_match[] = {
|
|
{.compatible = "ilitek,ili2130",},
|
|
{.compatible = "ilitek,ili2131",},
|
|
{.compatible = "ilitek,ili2132",},
|
|
{.compatible = "ilitek,ili2316",},
|
|
{.compatible = "ilitek,ili2322",},
|
|
{.compatible = "ilitek,ili2323",},
|
|
{.compatible = "ilitek,ili2326",},
|
|
{.compatible = "ilitek,ili2520",},
|
|
{.compatible = "ilitek,ili2521",},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
|
|
#endif
|
|
|
|
static struct i2c_driver ilitek_ts_i2c_driver = {
|
|
.driver = {
|
|
.name = ILITEK_TS_NAME,
|
|
.pm = &ilitek_pm_ops,
|
|
.of_match_table = of_match_ptr(ilitek_ts_i2c_match),
|
|
.acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
|
|
},
|
|
.probe = ilitek_ts_i2c_probe,
|
|
.id_table = ilitek_ts_i2c_id,
|
|
};
|
|
module_i2c_driver(ilitek_ts_i2c_driver);
|
|
|
|
MODULE_AUTHOR("ILITEK");
|
|
MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
|
|
MODULE_LICENSE("GPL");
|