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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/input/touchscreen/ilitek_ts_i2c.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/input/touchscreen/ilitek_ts_i2c.c')
-rw-r--r-- | drivers/input/touchscreen/ilitek_ts_i2c.c | 690 |
1 files changed, 690 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c new file mode 100644 index 000000000..c5d259c76 --- /dev/null +++ b/drivers/input/touchscreen/ilitek_ts_i2c.c @@ -0,0 +1,690 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ILITEK Touch IC driver for 23XX, 25XX and Lego series + * + * Copyright (C) 2011 ILI Technology Corporation. + * Copyright (C) 2020 Luca Hsu <luca_hsu@ilitek.com> + * Copyright (C) 2021 Joe Hung <joe_hung@ilitek.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/errno.h> +#include <linux/acpi.h> +#include <linux/input/touchscreen.h> +#include <asm/unaligned.h> + + +#define ILITEK_TS_NAME "ilitek_ts" +#define BL_V1_8 0x108 +#define BL_V1_7 0x107 +#define BL_V1_6 0x106 + +#define ILITEK_TP_CMD_GET_TP_RES 0x20 +#define ILITEK_TP_CMD_GET_SCRN_RES 0x21 +#define ILITEK_TP_CMD_SET_IC_SLEEP 0x30 +#define ILITEK_TP_CMD_SET_IC_WAKE 0x31 +#define ILITEK_TP_CMD_GET_FW_VER 0x40 +#define ILITEK_TP_CMD_GET_PRL_VER 0x42 +#define ILITEK_TP_CMD_GET_MCU_VER 0x61 +#define ILITEK_TP_CMD_GET_IC_MODE 0xC0 + +#define REPORT_COUNT_ADDRESS 61 +#define ILITEK_SUPPORT_MAX_POINT 40 + +struct ilitek_protocol_info { + u16 ver; + u8 ver_major; +}; + +struct ilitek_ts_data { + struct i2c_client *client; + struct gpio_desc *reset_gpio; + struct input_dev *input_dev; + struct touchscreen_properties prop; + + const struct ilitek_protocol_map *ptl_cb_func; + struct ilitek_protocol_info ptl; + + char product_id[30]; + u16 mcu_ver; + u8 ic_mode; + u8 firmware_ver[8]; + + s32 reset_time; + s32 screen_max_x; + s32 screen_max_y; + s32 screen_min_x; + s32 screen_min_y; + s32 max_tp; +}; + +struct ilitek_protocol_map { + u16 cmd; + const char *name; + int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf); +}; + +enum ilitek_cmds { + /* common cmds */ + GET_PTL_VER = 0, + GET_FW_VER, + GET_SCRN_RES, + GET_TP_RES, + GET_IC_MODE, + GET_MCU_VER, + SET_IC_SLEEP, + SET_IC_WAKE, + + /* ALWAYS keep at the end */ + MAX_CMD_CNT +}; + +/* ILITEK I2C R/W APIs */ +static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts, + u8 *cmd, int write_len, int delay, + u8 *data, int read_len) +{ + int error; + struct i2c_client *client = ts->client; + struct i2c_msg msgs[] = { + { + .addr = client->addr, + .flags = 0, + .len = write_len, + .buf = cmd, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = read_len, + .buf = data, + }, + }; + + if (delay == 0 && write_len > 0 && read_len > 0) { + error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (error < 0) + return error; + } else { + if (write_len > 0) { + error = i2c_transfer(client->adapter, msgs, 1); + if (error < 0) + return error; + } + if (delay > 0) + mdelay(delay); + + if (read_len > 0) { + error = i2c_transfer(client->adapter, msgs + 1, 1); + if (error < 0) + return error; + } + } + + return 0; +} + +/* ILITEK ISR APIs */ +static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id, + unsigned int x, unsigned int y) +{ + struct input_dev *input = ts->input_dev; + + input_mt_slot(input, id); + input_mt_report_slot_state(input, MT_TOOL_FINGER, true); + + touchscreen_report_pos(input, &ts->prop, x, y, true); +} + +static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) +{ + int error = 0; + u8 buf[512]; + int packet_len = 5; + int packet_max_point = 10; + int report_max_point; + int i, count; + struct input_dev *input = ts->input_dev; + struct device *dev = &ts->client->dev; + unsigned int x, y, status, id; + + error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64); + if (error) { + dev_err(dev, "get touch info failed, err:%d\n", error); + goto err_sync_frame; + } + + report_max_point = buf[REPORT_COUNT_ADDRESS]; + if (report_max_point > ts->max_tp) { + dev_err(dev, "FW report max point:%d > panel info. max:%d\n", + report_max_point, ts->max_tp); + error = -EINVAL; + goto err_sync_frame; + } + + count = DIV_ROUND_UP(report_max_point, packet_max_point); + for (i = 1; i < count; i++) { + error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, + buf + i * 64, 64); + if (error) { + dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n", + count, error); + goto err_sync_frame; + } + } + + for (i = 0; i < report_max_point; i++) { + status = buf[i * packet_len + 1] & 0x40; + if (!status) + continue; + + id = buf[i * packet_len + 1] & 0x3F; + + x = get_unaligned_le16(buf + i * packet_len + 2); + y = get_unaligned_le16(buf + i * packet_len + 4); + + if (x > ts->screen_max_x || x < ts->screen_min_x || + y > ts->screen_max_y || y < ts->screen_min_y) { + dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n", + ts->screen_min_x, x, ts->screen_max_x, + ts->screen_min_y, y, ts->screen_max_y); + continue; + } + + ilitek_touch_down(ts, id, x, y); + } + +err_sync_frame: + input_mt_sync_frame(input); + input_sync(input); + return error; +} + +/* APIs of cmds for ILITEK Touch IC */ +static int api_protocol_set_cmd(struct ilitek_ts_data *ts, + u16 idx, u8 *inbuf, u8 *outbuf) +{ + u16 cmd; + int error; + + if (idx >= MAX_CMD_CNT) + return -EINVAL; + + cmd = ts->ptl_cb_func[idx].cmd; + error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf); + if (error) + return error; + + return 0; +} + +static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3); + if (error) + return error; + + ts->ptl.ver = get_unaligned_be16(outbuf); + ts->ptl.ver_major = outbuf[0]; + + return 0; +} + +static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32); + if (error) + return error; + + ts->mcu_ver = get_unaligned_le16(outbuf); + memset(ts->product_id, 0, sizeof(ts->product_id)); + memcpy(ts->product_id, outbuf + 6, 26); + + return 0; +} + +static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8); + if (error) + return error; + + memcpy(ts->firmware_ver, outbuf, 8); + + return 0; +} + +static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8); + if (error) + return error; + + ts->screen_min_x = get_unaligned_le16(outbuf); + ts->screen_min_y = get_unaligned_le16(outbuf + 2); + ts->screen_max_x = get_unaligned_le16(outbuf + 4); + ts->screen_max_y = get_unaligned_le16(outbuf + 6); + + return 0; +} + +static int api_protocol_get_tp_res(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15); + if (error) + return error; + + ts->max_tp = outbuf[8]; + if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) { + dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n", + ts->max_tp); + return -EINVAL; + } + + return 0; +} + +static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + int error; + u8 buf[64]; + + buf[0] = cmd; + error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2); + if (error) + return error; + + ts->ic_mode = outbuf[0]; + return 0; +} + +static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + u8 buf[64]; + + buf[0] = cmd; + return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0); +} + +static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts, + u16 cmd, u8 *inbuf, u8 *outbuf) +{ + u8 buf[64]; + + buf[0] = cmd; + return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0); +} + +static const struct ilitek_protocol_map ptl_func_map[] = { + /* common cmds */ + [GET_PTL_VER] = { + ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER", + api_protocol_get_ptl_ver + }, + [GET_FW_VER] = { + ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER", + api_protocol_get_fw_ver + }, + [GET_SCRN_RES] = { + ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES", + api_protocol_get_scrn_res + }, + [GET_TP_RES] = { + ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES", + api_protocol_get_tp_res + }, + [GET_IC_MODE] = { + ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE", + api_protocol_get_ic_mode + }, + [GET_MCU_VER] = { + ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER", + api_protocol_get_mcu_ver + }, + [SET_IC_SLEEP] = { + ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP", + api_protocol_set_ic_sleep + }, + [SET_IC_WAKE] = { + ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE", + api_protocol_set_ic_wake + }, +}; + +/* Probe APIs */ +static void ilitek_reset(struct ilitek_ts_data *ts, int delay) +{ + if (ts->reset_gpio) { + gpiod_set_value(ts->reset_gpio, 1); + mdelay(10); + gpiod_set_value(ts->reset_gpio, 0); + mdelay(delay); + } +} + +static int ilitek_protocol_init(struct ilitek_ts_data *ts) +{ + int error; + u8 outbuf[64]; + + ts->ptl_cb_func = ptl_func_map; + ts->reset_time = 600; + + error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf); + if (error) + return error; + + /* Protocol v3 is not support currently */ + if (ts->ptl.ver_major == 0x3 || + ts->ptl.ver == BL_V1_6 || + ts->ptl.ver == BL_V1_7) + return -EINVAL; + + return 0; +} + +static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot) +{ + u8 outbuf[256]; + int error; + + error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf); + if (error) + return error; + + error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf); + if (error) + return error; + + error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf); + if (error) + return error; + + if (boot) { + error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL, + outbuf); + if (error) + return error; + } + + error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf); + if (error) + return error; + + error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf); + if (error) + return error; + + return 0; +} + +static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts) +{ + int error; + struct input_dev *input; + + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + ts->input_dev = input; + input->name = ILITEK_TS_NAME; + input->id.bustype = BUS_I2C; + + __set_bit(INPUT_PROP_DIRECT, input->propbit); + + input_set_abs_params(input, ABS_MT_POSITION_X, + ts->screen_min_x, ts->screen_max_x, 0, 0); + input_set_abs_params(input, ABS_MT_POSITION_Y, + ts->screen_min_y, ts->screen_max_y, 0, 0); + + touchscreen_parse_properties(input, true, &ts->prop); + + error = input_mt_init_slots(input, ts->max_tp, + INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); + if (error) { + dev_err(dev, "initialize MT slots failed, err:%d\n", error); + return error; + } + + error = input_register_device(input); + if (error) { + dev_err(dev, "register input device failed, err:%d\n", error); + return error; + } + + return 0; +} + +static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id) +{ + struct ilitek_ts_data *ts = dev_id; + int error; + + error = ilitek_process_and_report_v6(ts); + if (error < 0) { + dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error); + return IRQ_NONE; + } + + return IRQ_HANDLED; +} + +static ssize_t firmware_version_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, + "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"); |