| /* |
| * MELFAS MIP4 Touchscreen |
| * |
| * Copyright (C) 2016 MELFAS Inc. |
| * |
| * Author : Sangwon Jee <jeesw@melfas.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/acpi.h> |
| #include <linux/delay.h> |
| #include <linux/firmware.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/input.h> |
| #include <linux/input/mt.h> |
| #include <linux/interrupt.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/slab.h> |
| #include <asm/unaligned.h> |
| |
| #define MIP4_DEVICE_NAME "mip4_ts" |
| |
| /***************************************************************** |
| * Protocol |
| * Version : MIP 4.0 Rev 4.6 |
| *****************************************************************/ |
| |
| /* Address */ |
| #define MIP4_R0_BOOT 0x00 |
| #define MIP4_R1_BOOT_MODE 0x01 |
| #define MIP4_R1_BOOT_BUF_ADDR 0x10 |
| #define MIP4_R1_BOOT_STATUS 0x20 |
| #define MIP4_R1_BOOT_CMD 0x30 |
| #define MIP4_R1_BOOT_TARGET_ADDR 0x40 |
| #define MIP4_R1_BOOT_SIZE 0x44 |
| |
| #define MIP4_R0_INFO 0x01 |
| #define MIP4_R1_INFO_PRODUCT_NAME 0x00 |
| #define MIP4_R1_INFO_RESOLUTION_X 0x10 |
| #define MIP4_R1_INFO_RESOLUTION_Y 0x12 |
| #define MIP4_R1_INFO_NODE_NUM_X 0x14 |
| #define MIP4_R1_INFO_NODE_NUM_Y 0x15 |
| #define MIP4_R1_INFO_KEY_NUM 0x16 |
| #define MIP4_R1_INFO_PRESSURE_NUM 0x17 |
| #define MIP4_R1_INFO_LENGTH_X 0x18 |
| #define MIP4_R1_INFO_LENGTH_Y 0x1A |
| #define MIP4_R1_INFO_PPM_X 0x1C |
| #define MIP4_R1_INFO_PPM_Y 0x1D |
| #define MIP4_R1_INFO_VERSION_BOOT 0x20 |
| #define MIP4_R1_INFO_VERSION_CORE 0x22 |
| #define MIP4_R1_INFO_VERSION_APP 0x24 |
| #define MIP4_R1_INFO_VERSION_PARAM 0x26 |
| #define MIP4_R1_INFO_SECT_BOOT_START 0x30 |
| #define MIP4_R1_INFO_SECT_BOOT_END 0x31 |
| #define MIP4_R1_INFO_SECT_CORE_START 0x32 |
| #define MIP4_R1_INFO_SECT_CORE_END 0x33 |
| #define MIP4_R1_INFO_SECT_APP_START 0x34 |
| #define MIP4_R1_INFO_SECT_APP_END 0x35 |
| #define MIP4_R1_INFO_SECT_PARAM_START 0x36 |
| #define MIP4_R1_INFO_SECT_PARAM_END 0x37 |
| #define MIP4_R1_INFO_BUILD_DATE 0x40 |
| #define MIP4_R1_INFO_BUILD_TIME 0x44 |
| #define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48 |
| #define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A |
| #define MIP4_R1_INFO_PROTOCOL_NAME 0x50 |
| #define MIP4_R1_INFO_PROTOCOL_VERSION 0x58 |
| #define MIP4_R1_INFO_IC_ID 0x70 |
| #define MIP4_R1_INFO_IC_NAME 0x71 |
| #define MIP4_R1_INFO_IC_VENDOR_ID 0x75 |
| #define MIP4_R1_INFO_IC_HW_CATEGORY 0x77 |
| #define MIP4_R1_INFO_CONTACT_THD_SCR 0x78 |
| #define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A |
| |
| #define MIP4_R0_EVENT 0x02 |
| #define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00 |
| #define MIP4_R1_EVENT_FORMAT 0x04 |
| #define MIP4_R1_EVENT_SIZE 0x06 |
| #define MIP4_R1_EVENT_PACKET_INFO 0x10 |
| #define MIP4_R1_EVENT_PACKET_DATA 0x11 |
| |
| #define MIP4_R0_CTRL 0x06 |
| #define MIP4_R1_CTRL_READY_STATUS 0x00 |
| #define MIP4_R1_CTRL_EVENT_READY 0x01 |
| #define MIP4_R1_CTRL_MODE 0x10 |
| #define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11 |
| #define MIP4_R1_CTRL_RECALIBRATE 0x12 |
| #define MIP4_R1_CTRL_POWER_STATE 0x13 |
| #define MIP4_R1_CTRL_GESTURE_TYPE 0x14 |
| #define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18 |
| #define MIP4_R1_CTRL_CHARGER_MODE 0x19 |
| #define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A |
| #define MIP4_R1_CTRL_WINDOW_MODE 0x1B |
| #define MIP4_R1_CTRL_PALM_REJECTION 0x1C |
| #define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D |
| #define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E |
| #define MIP4_R1_CTRL_I2C_ON_LPM 0x1F |
| #define MIP4_R1_CTRL_GESTURE_DEBUG 0x20 |
| #define MIP4_R1_CTRL_PALM_EVENT 0x22 |
| #define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23 |
| |
| /* Value */ |
| #define MIP4_BOOT_MODE_BOOT 0x01 |
| #define MIP4_BOOT_MODE_APP 0x02 |
| |
| #define MIP4_BOOT_STATUS_BUSY 0x05 |
| #define MIP4_BOOT_STATUS_ERROR 0x0E |
| #define MIP4_BOOT_STATUS_DONE 0xA0 |
| |
| #define MIP4_BOOT_CMD_MASS_ERASE 0x15 |
| #define MIP4_BOOT_CMD_PROGRAM 0x54 |
| #define MIP4_BOOT_CMD_ERASE 0x8F |
| #define MIP4_BOOT_CMD_WRITE 0xA5 |
| #define MIP4_BOOT_CMD_READ 0xC2 |
| |
| #define MIP4_EVENT_INPUT_TYPE_KEY 0 |
| #define MIP4_EVENT_INPUT_TYPE_SCREEN 1 |
| #define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2 |
| |
| #define I2C_RETRY_COUNT 3 /* 2~ */ |
| |
| #define MIP4_BUF_SIZE 128 |
| #define MIP4_MAX_FINGERS 10 |
| #define MIP4_MAX_KEYS 4 |
| |
| #define MIP4_TOUCH_MAJOR_MIN 0 |
| #define MIP4_TOUCH_MAJOR_MAX 255 |
| #define MIP4_TOUCH_MINOR_MIN 0 |
| #define MIP4_TOUCH_MINOR_MAX 255 |
| #define MIP4_PRESSURE_MIN 0 |
| #define MIP4_PRESSURE_MAX 255 |
| |
| #define MIP4_FW_NAME "melfas_mip4.fw" |
| #define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */ |
| |
| struct mip4_fw_version { |
| u16 boot; |
| u16 core; |
| u16 app; |
| u16 param; |
| }; |
| |
| struct mip4_ts { |
| struct i2c_client *client; |
| struct input_dev *input; |
| struct gpio_desc *gpio_ce; |
| |
| char phys[32]; |
| char product_name[16]; |
| |
| unsigned int max_x; |
| unsigned int max_y; |
| u8 node_x; |
| u8 node_y; |
| u8 node_key; |
| unsigned int ppm_x; |
| unsigned int ppm_y; |
| |
| struct mip4_fw_version fw_version; |
| |
| unsigned int event_size; |
| unsigned int event_format; |
| |
| unsigned int key_num; |
| unsigned short key_code[MIP4_MAX_KEYS]; |
| |
| bool wake_irq_enabled; |
| |
| u8 buf[MIP4_BUF_SIZE]; |
| }; |
| |
| static int mip4_i2c_xfer(struct mip4_ts *ts, |
| char *write_buf, unsigned int write_len, |
| char *read_buf, unsigned int read_len) |
| { |
| struct i2c_msg msg[] = { |
| { |
| .addr = ts->client->addr, |
| .flags = 0, |
| .buf = write_buf, |
| .len = write_len, |
| }, { |
| .addr = ts->client->addr, |
| .flags = I2C_M_RD, |
| .buf = read_buf, |
| .len = read_len, |
| }, |
| }; |
| int retry = I2C_RETRY_COUNT; |
| int res; |
| int error; |
| |
| do { |
| res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
| if (res == ARRAY_SIZE(msg)) |
| return 0; |
| |
| error = res < 0 ? res : -EIO; |
| dev_err(&ts->client->dev, |
| "%s - i2c_transfer failed: %d (%d)\n", |
| __func__, error, res); |
| } while (--retry); |
| |
| return error; |
| } |
| |
| static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v) |
| { |
| v->boot = get_unaligned_le16(buf + 0); |
| v->core = get_unaligned_le16(buf + 2); |
| v->app = get_unaligned_le16(buf + 4); |
| v->param = get_unaligned_le16(buf + 6); |
| } |
| |
| /* |
| * Read chip firmware version |
| */ |
| static int mip4_get_fw_version(struct mip4_ts *ts) |
| { |
| u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT }; |
| u8 buf[sizeof(ts->fw_version)]; |
| int error; |
| |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf)); |
| if (error) { |
| memset(&ts->fw_version, 0xff, sizeof(ts->fw_version)); |
| return error; |
| } |
| |
| mip4_parse_fw_version(buf, &ts->fw_version); |
| |
| return 0; |
| } |
| |
| /* |
| * Fetch device characteristics |
| */ |
| static int mip4_query_device(struct mip4_ts *ts) |
| { |
| int error; |
| u8 cmd[2]; |
| u8 buf[14]; |
| |
| /* Product name */ |
| cmd[0] = MIP4_R0_INFO; |
| cmd[1] = MIP4_R1_INFO_PRODUCT_NAME; |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), |
| ts->product_name, sizeof(ts->product_name)); |
| if (error) |
| dev_warn(&ts->client->dev, |
| "Failed to retrieve product name: %d\n", error); |
| else |
| dev_dbg(&ts->client->dev, "product name: %.*s\n", |
| (int)sizeof(ts->product_name), ts->product_name); |
| |
| /* Firmware version */ |
| error = mip4_get_fw_version(ts); |
| if (error) |
| dev_warn(&ts->client->dev, |
| "Failed to retrieve FW version: %d\n", error); |
| else |
| dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n", |
| ts->fw_version.boot, ts->fw_version.core, |
| ts->fw_version.app, ts->fw_version.param); |
| |
| /* Resolution */ |
| cmd[0] = MIP4_R0_INFO; |
| cmd[1] = MIP4_R1_INFO_RESOLUTION_X; |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14); |
| if (error) { |
| dev_warn(&ts->client->dev, |
| "Failed to retrieve touchscreen parameters: %d\n", |
| error); |
| } else { |
| ts->max_x = get_unaligned_le16(&buf[0]); |
| ts->max_y = get_unaligned_le16(&buf[2]); |
| dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n", |
| ts->max_x, ts->max_y); |
| |
| ts->node_x = buf[4]; |
| ts->node_y = buf[5]; |
| ts->node_key = buf[6]; |
| dev_dbg(&ts->client->dev, |
| "node_x: %d, node_y: %d, node_key: %d\n", |
| ts->node_x, ts->node_y, ts->node_key); |
| |
| ts->ppm_x = buf[12]; |
| ts->ppm_y = buf[13]; |
| dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n", |
| ts->ppm_x, ts->ppm_y); |
| |
| /* Key ts */ |
| if (ts->node_key > 0) |
| ts->key_num = ts->node_key; |
| } |
| |
| /* Protocol */ |
| cmd[0] = MIP4_R0_EVENT; |
| cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC; |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7); |
| if (error) { |
| dev_warn(&ts->client->dev, |
| "Failed to retrieve device type: %d\n", error); |
| ts->event_format = 0xff; |
| } else { |
| ts->event_format = get_unaligned_le16(&buf[4]); |
| ts->event_size = buf[6]; |
| dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n", |
| ts->event_format, ts->event_size); |
| |
| if (ts->event_format == 2 || ts->event_format > 3) |
| dev_warn(&ts->client->dev, |
| "Unknown event format %d\n", ts->event_format); |
| } |
| |
| return 0; |
| } |
| |
| static int mip4_power_on(struct mip4_ts *ts) |
| { |
| if (ts->gpio_ce) { |
| gpiod_set_value_cansleep(ts->gpio_ce, 1); |
| |
| /* Booting delay : 200~300ms */ |
| usleep_range(200 * 1000, 300 * 1000); |
| } |
| |
| return 0; |
| } |
| |
| static void mip4_power_off(struct mip4_ts *ts) |
| { |
| if (ts->gpio_ce) |
| gpiod_set_value_cansleep(ts->gpio_ce, 0); |
| } |
| |
| /* |
| * Clear touch input event status |
| */ |
| static void mip4_clear_input(struct mip4_ts *ts) |
| { |
| int i; |
| |
| /* Screen */ |
| for (i = 0; i < MIP4_MAX_FINGERS; i++) { |
| input_mt_slot(ts->input, i); |
| input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0); |
| } |
| |
| /* Keys */ |
| for (i = 0; i < ts->key_num; i++) |
| input_report_key(ts->input, ts->key_code[i], 0); |
| |
| input_sync(ts->input); |
| } |
| |
| static int mip4_enable(struct mip4_ts *ts) |
| { |
| int error; |
| |
| error = mip4_power_on(ts); |
| if (error) |
| return error; |
| |
| enable_irq(ts->client->irq); |
| |
| return 0; |
| } |
| |
| static void mip4_disable(struct mip4_ts *ts) |
| { |
| disable_irq(ts->client->irq); |
| |
| mip4_power_off(ts); |
| |
| mip4_clear_input(ts); |
| } |
| |
| /***************************************************************** |
| * Input handling |
| *****************************************************************/ |
| |
| static void mip4_report_keys(struct mip4_ts *ts, u8 *packet) |
| { |
| u8 key; |
| bool down; |
| |
| switch (ts->event_format) { |
| case 0: |
| case 1: |
| key = packet[0] & 0x0F; |
| down = packet[0] & 0x80; |
| break; |
| |
| case 3: |
| default: |
| key = packet[0] & 0x0F; |
| down = packet[1] & 0x01; |
| break; |
| } |
| |
| /* Report key event */ |
| if (key >= 1 && key <= ts->key_num) { |
| unsigned short keycode = ts->key_code[key - 1]; |
| |
| dev_dbg(&ts->client->dev, |
| "Key - ID: %d, keycode: %d, state: %d\n", |
| key, keycode, down); |
| |
| input_event(ts->input, EV_MSC, MSC_SCAN, keycode); |
| input_report_key(ts->input, keycode, down); |
| |
| } else { |
| dev_err(&ts->client->dev, "Unknown key: %d\n", key); |
| } |
| } |
| |
| static void mip4_report_touch(struct mip4_ts *ts, u8 *packet) |
| { |
| int id; |
| bool hover; |
| bool palm; |
| bool state; |
| u16 x, y; |
| u8 pressure_stage = 0; |
| u8 pressure; |
| u8 size; |
| u8 touch_major; |
| u8 touch_minor; |
| |
| switch (ts->event_format) { |
| case 0: |
| case 1: |
| /* Touch only */ |
| state = packet[0] & BIT(7); |
| hover = packet[0] & BIT(5); |
| palm = packet[0] & BIT(4); |
| id = (packet[0] & 0x0F) - 1; |
| x = ((packet[1] & 0x0F) << 8) | packet[2]; |
| y = (((packet[1] >> 4) & 0x0F) << 8) | |
| packet[3]; |
| pressure = packet[4]; |
| size = packet[5]; |
| if (ts->event_format == 0) { |
| touch_major = packet[5]; |
| touch_minor = packet[5]; |
| } else { |
| touch_major = packet[6]; |
| touch_minor = packet[7]; |
| } |
| break; |
| |
| case 3: |
| default: |
| /* Touch + Force(Pressure) */ |
| id = (packet[0] & 0x0F) - 1; |
| hover = packet[1] & BIT(2); |
| palm = packet[1] & BIT(1); |
| state = packet[1] & BIT(0); |
| x = ((packet[2] & 0x0F) << 8) | packet[3]; |
| y = (((packet[2] >> 4) & 0x0F) << 8) | |
| packet[4]; |
| size = packet[6]; |
| pressure_stage = (packet[7] & 0xF0) >> 4; |
| pressure = ((packet[7] & 0x0F) << 8) | |
| packet[8]; |
| touch_major = packet[9]; |
| touch_minor = packet[10]; |
| break; |
| } |
| |
| dev_dbg(&ts->client->dev, |
| "Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n", |
| id, state, x, y, pressure); |
| |
| if (unlikely(id < 0 || id >= MIP4_MAX_FINGERS)) { |
| dev_err(&ts->client->dev, "Screen - invalid slot ID: %d\n", id); |
| } else if (state) { |
| /* Press or Move event */ |
| input_mt_slot(ts->input, id); |
| input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); |
| input_report_abs(ts->input, ABS_MT_POSITION_X, x); |
| input_report_abs(ts->input, ABS_MT_POSITION_Y, y); |
| input_report_abs(ts->input, ABS_MT_PRESSURE, pressure); |
| input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, touch_major); |
| input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, touch_minor); |
| } else { |
| /* Release event */ |
| input_mt_slot(ts->input, id); |
| input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0); |
| } |
| |
| input_mt_sync_frame(ts->input); |
| } |
| |
| static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet) |
| { |
| u8 type; |
| |
| switch (ts->event_format) { |
| case 0: |
| case 1: |
| type = (packet[0] & 0x40) >> 6; |
| break; |
| |
| case 3: |
| type = (packet[0] & 0xF0) >> 4; |
| break; |
| |
| default: |
| /* Should not happen unless we have corrupted firmware */ |
| return -EINVAL; |
| } |
| |
| dev_dbg(&ts->client->dev, "Type: %d\n", type); |
| |
| /* Report input event */ |
| switch (type) { |
| case MIP4_EVENT_INPUT_TYPE_KEY: |
| mip4_report_keys(ts, packet); |
| break; |
| |
| case MIP4_EVENT_INPUT_TYPE_SCREEN: |
| mip4_report_touch(ts, packet); |
| break; |
| |
| default: |
| dev_err(&ts->client->dev, "Unknown event type: %d\n", type); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static irqreturn_t mip4_interrupt(int irq, void *dev_id) |
| { |
| struct mip4_ts *ts = dev_id; |
| struct i2c_client *client = ts->client; |
| unsigned int i; |
| int error; |
| u8 cmd[2]; |
| u8 size; |
| bool alert; |
| |
| /* Read packet info */ |
| cmd[0] = MIP4_R0_EVENT; |
| cmd[1] = MIP4_R1_EVENT_PACKET_INFO; |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, 1); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to read packet info: %d\n", error); |
| goto out; |
| } |
| |
| size = ts->buf[0] & 0x7F; |
| alert = ts->buf[0] & BIT(7); |
| dev_dbg(&client->dev, "packet size: %d, alert: %d\n", size, alert); |
| |
| /* Check size */ |
| if (!size) { |
| dev_err(&client->dev, "Empty packet\n"); |
| goto out; |
| } |
| |
| /* Read packet data */ |
| cmd[0] = MIP4_R0_EVENT; |
| cmd[1] = MIP4_R1_EVENT_PACKET_DATA; |
| error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, size); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to read packet data: %d\n", error); |
| goto out; |
| } |
| |
| if (alert) { |
| dev_dbg(&client->dev, "Alert: %d\n", ts->buf[0]); |
| } else { |
| for (i = 0; i < size; i += ts->event_size) { |
| error = mip4_handle_packet(ts, &ts->buf[i]); |
| if (error) |
| break; |
| } |
| |
| input_sync(ts->input); |
| } |
| |
| out: |
| return IRQ_HANDLED; |
| } |
| |
| static int mip4_input_open(struct input_dev *dev) |
| { |
| struct mip4_ts *ts = input_get_drvdata(dev); |
| |
| return mip4_enable(ts); |
| } |
| |
| static void mip4_input_close(struct input_dev *dev) |
| { |
| struct mip4_ts *ts = input_get_drvdata(dev); |
| |
| mip4_disable(ts); |
| } |
| |
| /***************************************************************** |
| * Firmware update |
| *****************************************************************/ |
| |
| /* Firmware Info */ |
| #define MIP4_BL_PAGE_SIZE 512 /* 512 */ |
| #define MIP4_BL_PACKET_SIZE 512 /* 512, 256, 128, 64, ... */ |
| |
| /* |
| * Firmware binary tail info |
| */ |
| |
| struct mip4_bin_tail { |
| u8 tail_mark[4]; |
| u8 chip_name[4]; |
| |
| __le32 bin_start_addr; |
| __le32 bin_length; |
| |
| __le16 ver_boot; |
| __le16 ver_core; |
| __le16 ver_app; |
| __le16 ver_param; |
| |
| u8 boot_start; |
| u8 boot_end; |
| u8 core_start; |
| u8 core_end; |
| u8 app_start; |
| u8 app_end; |
| u8 param_start; |
| u8 param_end; |
| |
| u8 checksum_type; |
| u8 hw_category; |
| |
| __le16 param_id; |
| __le32 param_length; |
| __le32 build_date; |
| __le32 build_time; |
| |
| __le32 reserved1; |
| __le32 reserved2; |
| __le16 reserved3; |
| __le16 tail_size; |
| __le32 crc; |
| } __packed; |
| |
| #define MIP4_BIN_TAIL_MARK "MBT\001" |
| #define MIP4_BIN_TAIL_SIZE (sizeof(struct mip4_bin_tail)) |
| |
| /* |
| * Bootloader - Read status |
| */ |
| static int mip4_bl_read_status(struct mip4_ts *ts) |
| { |
| u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_STATUS }; |
| u8 result; |
| struct i2c_msg msg[] = { |
| { |
| .addr = ts->client->addr, |
| .flags = 0, |
| .buf = cmd, |
| .len = sizeof(cmd), |
| }, { |
| .addr = ts->client->addr, |
| .flags = I2C_M_RD, |
| .buf = &result, |
| .len = sizeof(result), |
| }, |
| }; |
| int ret; |
| int error; |
| int retry = 1000; |
| |
| do { |
| ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
| if (ret != ARRAY_SIZE(msg)) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to read bootloader status: %d\n", |
| error); |
| return error; |
| } |
| |
| switch (result) { |
| case MIP4_BOOT_STATUS_DONE: |
| dev_dbg(&ts->client->dev, "%s - done\n", __func__); |
| return 0; |
| |
| case MIP4_BOOT_STATUS_ERROR: |
| dev_err(&ts->client->dev, "Bootloader failure\n"); |
| return -EIO; |
| |
| case MIP4_BOOT_STATUS_BUSY: |
| dev_dbg(&ts->client->dev, "%s - Busy\n", __func__); |
| error = -EBUSY; |
| break; |
| |
| default: |
| dev_err(&ts->client->dev, |
| "Unexpected bootloader status: %#02x\n", |
| result); |
| error = -EINVAL; |
| break; |
| } |
| |
| usleep_range(1000, 2000); |
| } while (--retry); |
| |
| return error; |
| } |
| |
| /* |
| * Bootloader - Change mode |
| */ |
| static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode) |
| { |
| u8 mode_chg_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE, mode }; |
| u8 mode_read_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE }; |
| u8 result; |
| struct i2c_msg msg[] = { |
| { |
| .addr = ts->client->addr, |
| .flags = 0, |
| .buf = mode_read_cmd, |
| .len = sizeof(mode_read_cmd), |
| }, { |
| .addr = ts->client->addr, |
| .flags = I2C_M_RD, |
| .buf = &result, |
| .len = sizeof(result), |
| }, |
| }; |
| int retry = 10; |
| int ret; |
| int error; |
| |
| do { |
| /* Send mode change command */ |
| ret = i2c_master_send(ts->client, |
| mode_chg_cmd, sizeof(mode_chg_cmd)); |
| if (ret != sizeof(mode_chg_cmd)) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send %d mode change: %d (%d)\n", |
| mode, error, ret); |
| return error; |
| } |
| |
| dev_dbg(&ts->client->dev, |
| "Sent mode change request (mode: %d)\n", mode); |
| |
| /* Wait */ |
| msleep(1000); |
| |
| /* Verify target mode */ |
| ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
| if (ret != ARRAY_SIZE(msg)) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to read device mode: %d\n", error); |
| return error; |
| } |
| |
| dev_dbg(&ts->client->dev, |
| "Current device mode: %d, want: %d\n", result, mode); |
| |
| if (result == mode) |
| return 0; |
| |
| } while (--retry); |
| |
| return -EIO; |
| } |
| |
| /* |
| * Bootloader - Start bootloader mode |
| */ |
| static int mip4_bl_enter(struct mip4_ts *ts) |
| { |
| return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_BOOT); |
| } |
| |
| /* |
| * Bootloader - Exit bootloader mode |
| */ |
| static int mip4_bl_exit(struct mip4_ts *ts) |
| { |
| return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_APP); |
| } |
| |
| static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr) |
| { |
| u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_BUF_ADDR }; |
| u8 result[sizeof(u16)]; |
| struct i2c_msg msg[] = { |
| { |
| .addr = ts->client->addr, |
| .flags = 0, |
| .buf = cmd, |
| .len = sizeof(cmd), |
| }, { |
| .addr = ts->client->addr, |
| .flags = I2C_M_RD, |
| .buf = result, |
| .len = sizeof(result), |
| }, |
| }; |
| int ret; |
| int error; |
| |
| ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
| if (ret != ARRAY_SIZE(msg)) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to retrieve bootloader buffer address: %d\n", |
| error); |
| return error; |
| } |
| |
| *buf_addr = get_unaligned_le16(result); |
| dev_dbg(&ts->client->dev, |
| "Bootloader buffer address %#04x\n", *buf_addr); |
| |
| return 0; |
| } |
| |
| static int mip4_bl_program_page(struct mip4_ts *ts, int offset, |
| const u8 *data, int length, u16 buf_addr) |
| { |
| u8 cmd[6]; |
| u8 *data_buf; |
| u16 buf_offset; |
| int ret; |
| int error; |
| |
| dev_dbg(&ts->client->dev, "Writing page @%#06x (%d)\n", |
| offset, length); |
| |
| if (length > MIP4_BL_PAGE_SIZE || length % MIP4_BL_PACKET_SIZE) { |
| dev_err(&ts->client->dev, |
| "Invalid page length: %d\n", length); |
| return -EINVAL; |
| } |
| |
| data_buf = kmalloc(2 + MIP4_BL_PACKET_SIZE, GFP_KERNEL); |
| if (!data_buf) |
| return -ENOMEM; |
| |
| /* Addr */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_TARGET_ADDR; |
| put_unaligned_le32(offset, &cmd[2]); |
| ret = i2c_master_send(ts->client, cmd, 6); |
| if (ret != 6) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send write page address: %d\n", error); |
| goto out; |
| } |
| |
| /* Size */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_SIZE; |
| put_unaligned_le32(length, &cmd[2]); |
| ret = i2c_master_send(ts->client, cmd, 6); |
| if (ret != 6) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send write page size: %d\n", error); |
| goto out; |
| } |
| |
| /* Data */ |
| for (buf_offset = 0; |
| buf_offset < length; |
| buf_offset += MIP4_BL_PACKET_SIZE) { |
| dev_dbg(&ts->client->dev, |
| "writing chunk at %#04x (size %d)\n", |
| buf_offset, MIP4_BL_PACKET_SIZE); |
| put_unaligned_be16(buf_addr + buf_offset, data_buf); |
| memcpy(&data_buf[2], &data[buf_offset], MIP4_BL_PACKET_SIZE); |
| ret = i2c_master_send(ts->client, |
| data_buf, 2 + MIP4_BL_PACKET_SIZE); |
| if (ret != 2 + MIP4_BL_PACKET_SIZE) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to read chunk at %#04x (size %d): %d\n", |
| buf_offset, MIP4_BL_PACKET_SIZE, error); |
| goto out; |
| } |
| } |
| |
| /* Command */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_CMD; |
| cmd[2] = MIP4_BOOT_CMD_PROGRAM; |
| ret = i2c_master_send(ts->client, cmd, 3); |
| if (ret != 3) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send 'write' command: %d\n", error); |
| goto out; |
| } |
| |
| /* Status */ |
| error = mip4_bl_read_status(ts); |
| |
| out: |
| kfree(data_buf); |
| return error ? error : 0; |
| } |
| |
| static int mip4_bl_verify_page(struct mip4_ts *ts, int offset, |
| const u8 *data, int length, int buf_addr) |
| { |
| u8 cmd[8]; |
| u8 *read_buf; |
| int buf_offset; |
| struct i2c_msg msg[] = { |
| { |
| .addr = ts->client->addr, |
| .flags = 0, |
| .buf = cmd, |
| .len = 2, |
| }, { |
| .addr = ts->client->addr, |
| .flags = I2C_M_RD, |
| .len = MIP4_BL_PACKET_SIZE, |
| }, |
| }; |
| int ret; |
| int error; |
| |
| dev_dbg(&ts->client->dev, "Validating page @%#06x (%d)\n", |
| offset, length); |
| |
| /* Addr */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_TARGET_ADDR; |
| put_unaligned_le32(offset, &cmd[2]); |
| ret = i2c_master_send(ts->client, cmd, 6); |
| if (ret != 6) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send read page address: %d\n", error); |
| return error; |
| } |
| |
| /* Size */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_SIZE; |
| put_unaligned_le32(length, &cmd[2]); |
| ret = i2c_master_send(ts->client, cmd, 6); |
| if (ret != 6) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send read page size: %d\n", error); |
| return error; |
| } |
| |
| /* Command */ |
| cmd[0] = MIP4_R0_BOOT; |
| cmd[1] = MIP4_R1_BOOT_CMD; |
| cmd[2] = MIP4_BOOT_CMD_READ; |
| ret = i2c_master_send(ts->client, cmd, 3); |
| if (ret != 3) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to send 'read' command: %d\n", error); |
| return error; |
| } |
| |
| /* Status */ |
| error = mip4_bl_read_status(ts); |
| if (error) |
| return error; |
| |
| /* Read */ |
| msg[1].buf = read_buf = kmalloc(MIP4_BL_PACKET_SIZE, GFP_KERNEL); |
| if (!read_buf) |
| return -ENOMEM; |
| |
| for (buf_offset = 0; |
| buf_offset < length; |
| buf_offset += MIP4_BL_PACKET_SIZE) { |
| dev_dbg(&ts->client->dev, |
| "reading chunk at %#04x (size %d)\n", |
| buf_offset, MIP4_BL_PACKET_SIZE); |
| put_unaligned_be16(buf_addr + buf_offset, cmd); |
| ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
| if (ret != ARRAY_SIZE(msg)) { |
| error = ret < 0 ? ret : -EIO; |
| dev_err(&ts->client->dev, |
| "Failed to read chunk at %#04x (size %d): %d\n", |
| buf_offset, MIP4_BL_PACKET_SIZE, error); |
| break; |
| } |
| |
| if (memcmp(&data[buf_offset], read_buf, MIP4_BL_PACKET_SIZE)) { |
| dev_err(&ts->client->dev, |
| "Failed to validate chunk at %#04x (size %d)\n", |
| buf_offset, MIP4_BL_PACKET_SIZE); |
| #if MIP4_FW_UPDATE_DEBUG |
| print_hex_dump(KERN_DEBUG, |
| MIP4_DEVICE_NAME " F/W File: ", |
| DUMP_PREFIX_OFFSET, 16, 1, |
| data + offset, MIP4_BL_PACKET_SIZE, |
| false); |
| print_hex_dump(KERN_DEBUG, |
| MIP4_DEVICE_NAME " F/W Chip: ", |
| DUMP_PREFIX_OFFSET, 16, 1, |
| read_buf, MIP4_BL_PAGE_SIZE, false); |
| #endif |
| error = -EINVAL; |
| break; |
| } |
| } |
| |
| kfree(read_buf); |
| return error ? error : 0; |
| } |
| |
| /* |
| * Flash chip firmware |
| */ |
| static int mip4_flash_fw(struct mip4_ts *ts, |
| const u8 *fw_data, u32 fw_size, u32 fw_offset) |
| { |
| struct i2c_client *client = ts->client; |
| int offset; |
| u16 buf_addr; |
| int error, error2; |
| |
| /* Enter bootloader mode */ |
| dev_dbg(&client->dev, "Entering bootloader mode\n"); |
| |
| error = mip4_bl_enter(ts); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to enter bootloader mode: %d\n", |
| error); |
| return error; |
| } |
| |
| /* Read info */ |
| error = mip4_bl_get_address(ts, &buf_addr); |
| if (error) |
| goto exit_bl; |
| |
| /* Program & Verify */ |
| dev_dbg(&client->dev, |
| "Program & Verify, page size: %d, packet size: %d\n", |
| MIP4_BL_PAGE_SIZE, MIP4_BL_PACKET_SIZE); |
| |
| for (offset = fw_offset; |
| offset < fw_offset + fw_size; |
| offset += MIP4_BL_PAGE_SIZE) { |
| /* Program */ |
| error = mip4_bl_program_page(ts, offset, fw_data + offset, |
| MIP4_BL_PAGE_SIZE, buf_addr); |
| if (error) |
| break; |
| |
| /* Verify */ |
| error = mip4_bl_verify_page(ts, offset, fw_data + offset, |
| MIP4_BL_PAGE_SIZE, buf_addr); |
| if (error) |
| break; |
| } |
| |
| exit_bl: |
| /* Exit bootloader mode */ |
| dev_dbg(&client->dev, "Exiting bootloader mode\n"); |
| |
| error2 = mip4_bl_exit(ts); |
| if (error2) { |
| dev_err(&client->dev, |
| "Failed to exit bootloader mode: %d\n", error2); |
| if (!error) |
| error = error2; |
| } |
| |
| /* Reset chip */ |
| mip4_power_off(ts); |
| mip4_power_on(ts); |
| |
| mip4_query_device(ts); |
| |
| /* Refresh device parameters */ |
| input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0); |
| input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0); |
| input_set_abs_params(ts->input, ABS_X, 0, ts->max_x, 0, 0); |
| input_set_abs_params(ts->input, ABS_Y, 0, ts->max_y, 0, 0); |
| input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x); |
| input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y); |
| input_abs_set_res(ts->input, ABS_X, ts->ppm_x); |
| input_abs_set_res(ts->input, ABS_Y, ts->ppm_y); |
| |
| return error ? error : 0; |
| } |
| |
| static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw, |
| u32 *fw_offset_start, u32 *fw_size, |
| const struct mip4_bin_tail **pfw_info) |
| { |
| const struct mip4_bin_tail *fw_info; |
| struct mip4_fw_version fw_version; |
| u16 tail_size; |
| |
| if (fw->size < MIP4_BIN_TAIL_SIZE) { |
| dev_err(&ts->client->dev, |
| "Invalid firmware, size mismatch (tail %zd vs %zd)\n", |
| MIP4_BIN_TAIL_SIZE, fw->size); |
| return -EINVAL; |
| } |
| |
| fw_info = (const void *)&fw->data[fw->size - MIP4_BIN_TAIL_SIZE]; |
| |
| #if MIP4_FW_UPDATE_DEBUG |
| print_hex_dump(KERN_ERR, MIP4_DEVICE_NAME " Bin Info: ", |
| DUMP_PREFIX_OFFSET, 16, 1, *fw_info, tail_size, false); |
| #endif |
| |
| tail_size = get_unaligned_le16(&fw_info->tail_size); |
| if (tail_size != MIP4_BIN_TAIL_SIZE) { |
| dev_err(&ts->client->dev, |
| "wrong tail size: %d (expected %zd)\n", |
| tail_size, MIP4_BIN_TAIL_SIZE); |
| return -EINVAL; |
| } |
| |
| /* Check bin format */ |
| if (memcmp(fw_info->tail_mark, MIP4_BIN_TAIL_MARK, |
| sizeof(fw_info->tail_mark))) { |
| dev_err(&ts->client->dev, |
| "unable to locate tail marker (%*ph vs %*ph)\n", |
| (int)sizeof(fw_info->tail_mark), fw_info->tail_mark, |
| (int)sizeof(fw_info->tail_mark), MIP4_BIN_TAIL_MARK); |
| return -EINVAL; |
| } |
| |
| *fw_offset_start = get_unaligned_le32(&fw_info->bin_start_addr); |
| *fw_size = get_unaligned_le32(&fw_info->bin_length); |
| |
| dev_dbg(&ts->client->dev, |
| "F/W Data offset: %#08x, size: %d\n", |
| *fw_offset_start, *fw_size); |
| |
| if (*fw_size % MIP4_BL_PAGE_SIZE) { |
| dev_err(&ts->client->dev, |
| "encoded fw length %d is not multiple of pages (%d)\n", |
| *fw_size, MIP4_BL_PAGE_SIZE); |
| return -EINVAL; |
| } |
| |
| if (fw->size != *fw_offset_start + *fw_size) { |
| dev_err(&ts->client->dev, |
| "Wrong firmware size, expected %d bytes, got %zd\n", |
| *fw_offset_start + *fw_size, fw->size); |
| return -EINVAL; |
| } |
| |
| mip4_parse_fw_version((const u8 *)&fw_info->ver_boot, &fw_version); |
| |
| dev_dbg(&ts->client->dev, |
| "F/W file version %04X %04X %04X %04X\n", |
| fw_version.boot, fw_version.core, |
| fw_version.app, fw_version.param); |
| |
| dev_dbg(&ts->client->dev, "F/W chip version: %04X %04X %04X %04X\n", |
| ts->fw_version.boot, ts->fw_version.core, |
| ts->fw_version.app, ts->fw_version.param); |
| |
| /* Check F/W type */ |
| if (fw_version.boot != 0xEEEE && fw_version.boot != 0xFFFF && |
| fw_version.core == 0xEEEE && |
| fw_version.app == 0xEEEE && |
| fw_version.param == 0xEEEE) { |
| dev_dbg(&ts->client->dev, "F/W type: Bootloader\n"); |
| } else if (fw_version.boot == 0xEEEE && |
| fw_version.core != 0xEEEE && fw_version.core != 0xFFFF && |
| fw_version.app != 0xEEEE && fw_version.app != 0xFFFF && |
| fw_version.param != 0xEEEE && fw_version.param != 0xFFFF) { |
| dev_dbg(&ts->client->dev, "F/W type: Main\n"); |
| } else { |
| dev_err(&ts->client->dev, "Wrong firmware type\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw) |
| { |
| const struct mip4_bin_tail *fw_info; |
| u32 fw_start_offset; |
| u32 fw_size; |
| int retires = 3; |
| int error; |
| |
| error = mip4_parse_firmware(ts, fw, |
| &fw_start_offset, &fw_size, &fw_info); |
| if (error) |
| return error; |
| |
| if (ts->input->users) { |
| disable_irq(ts->client->irq); |
| } else { |
| error = mip4_power_on(ts); |
| if (error) |
| return error; |
| } |
| |
| /* Update firmware */ |
| do { |
| error = mip4_flash_fw(ts, fw->data, fw_size, fw_start_offset); |
| if (!error) |
| break; |
| } while (--retires); |
| |
| if (error) |
| dev_err(&ts->client->dev, |
| "Failed to flash firmware: %d\n", error); |
| |
| /* Enable IRQ */ |
| if (ts->input->users) |
| enable_irq(ts->client->irq); |
| else |
| mip4_power_off(ts); |
| |
| return error ? error : 0; |
| } |
| |
| static ssize_t mip4_sysfs_fw_update(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mip4_ts *ts = i2c_get_clientdata(client); |
| const struct firmware *fw; |
| int error; |
| |
| error = request_firmware(&fw, MIP4_FW_NAME, dev); |
| if (error) { |
| dev_err(&ts->client->dev, |
| "Failed to retrieve firmware %s: %d\n", |
| MIP4_FW_NAME, error); |
| return error; |
| } |
| |
| /* |
| * Take input mutex to prevent racing with itself and also with |
| * userspace opening and closing the device and also suspend/resume |
| * transitions. |
| */ |
| mutex_lock(&ts->input->mutex); |
| |
| error = mip4_execute_fw_update(ts, fw); |
| |
| mutex_unlock(&ts->input->mutex); |
| |
| release_firmware(fw); |
| |
| if (error) { |
| dev_err(&ts->client->dev, |
| "Firmware update failed: %d\n", error); |
| return error; |
| } |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update); |
| |
| static ssize_t mip4_sysfs_read_fw_version(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mip4_ts *ts = i2c_get_clientdata(client); |
| size_t count; |
| |
| /* Take lock to prevent racing with firmware update */ |
| mutex_lock(&ts->input->mutex); |
| |
| count = snprintf(buf, PAGE_SIZE, "%04X %04X %04X %04X\n", |
| ts->fw_version.boot, ts->fw_version.core, |
| ts->fw_version.app, ts->fw_version.param); |
| |
| mutex_unlock(&ts->input->mutex); |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL); |
| |
| static struct attribute *mip4_attrs[] = { |
| &dev_attr_fw_version.attr, |
| &dev_attr_update_fw.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group mip4_attr_group = { |
| .attrs = mip4_attrs, |
| }; |
| |
| static void mip4_sysfs_remove(void *_data) |
| { |
| struct mip4_ts *ts = _data; |
| |
| sysfs_remove_group(&ts->client->dev.kobj, &mip4_attr_group); |
| } |
| |
| static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id) |
| { |
| struct mip4_ts *ts; |
| struct input_dev *input; |
| int error; |
| |
| if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| dev_err(&client->dev, "Not supported I2C adapter\n"); |
| return -ENXIO; |
| } |
| |
| ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); |
| if (!ts) |
| return -ENOMEM; |
| |
| input = devm_input_allocate_device(&client->dev); |
| if (!input) |
| return -ENOMEM; |
| |
| ts->client = client; |
| ts->input = input; |
| |
| snprintf(ts->phys, sizeof(ts->phys), |
| "%s/input0", dev_name(&client->dev)); |
| |
| ts->gpio_ce = devm_gpiod_get_optional(&client->dev, |
| "ce", GPIOD_OUT_LOW); |
| if (IS_ERR(ts->gpio_ce)) { |
| error = PTR_ERR(ts->gpio_ce); |
| if (error != EPROBE_DEFER) |
| dev_err(&client->dev, |
| "Failed to get gpio: %d\n", error); |
| return error; |
| } |
| |
| error = mip4_power_on(ts); |
| if (error) |
| return error; |
| error = mip4_query_device(ts); |
| mip4_power_off(ts); |
| if (error) |
| return error; |
| |
| input->name = "MELFAS MIP4 Touchscreen"; |
| input->phys = ts->phys; |
| |
| input->id.bustype = BUS_I2C; |
| input->id.vendor = 0x13c5; |
| |
| input->open = mip4_input_open; |
| input->close = mip4_input_close; |
| |
| input_set_drvdata(input, ts); |
| |
| input->keycode = ts->key_code; |
| input->keycodesize = sizeof(*ts->key_code); |
| input->keycodemax = ts->key_num; |
| |
| input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0); |
| input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0); |
| input_set_abs_params(input, ABS_MT_PRESSURE, |
| MIP4_PRESSURE_MIN, MIP4_PRESSURE_MAX, 0, 0); |
| input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, |
| MIP4_TOUCH_MAJOR_MIN, MIP4_TOUCH_MAJOR_MAX, 0, 0); |
| input_set_abs_params(input, ABS_MT_TOUCH_MINOR, |
| MIP4_TOUCH_MINOR_MIN, MIP4_TOUCH_MINOR_MAX, 0, 0); |
| input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x); |
| input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y); |
| |
| error = input_mt_init_slots(input, MIP4_MAX_FINGERS, INPUT_MT_DIRECT); |
| if (error) |
| return error; |
| |
| i2c_set_clientdata(client, ts); |
| |
| error = devm_request_threaded_irq(&client->dev, client->irq, |
| NULL, mip4_interrupt, |
| IRQF_ONESHOT, MIP4_DEVICE_NAME, ts); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to request interrupt %d: %d\n", |
| client->irq, error); |
| return error; |
| } |
| |
| disable_irq(client->irq); |
| |
| error = input_register_device(input); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to register input device: %d\n", error); |
| return error; |
| } |
| |
| error = sysfs_create_group(&client->dev.kobj, &mip4_attr_group); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to create sysfs attribute group: %d\n", error); |
| return error; |
| } |
| |
| error = devm_add_action(&client->dev, mip4_sysfs_remove, ts); |
| if (error) { |
| mip4_sysfs_remove(ts); |
| dev_err(&client->dev, |
| "Failed to install sysfs remoce action: %d\n", error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int __maybe_unused mip4_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mip4_ts *ts = i2c_get_clientdata(client); |
| struct input_dev *input = ts->input; |
| |
| mutex_lock(&input->mutex); |
| |
| if (device_may_wakeup(dev)) |
| ts->wake_irq_enabled = enable_irq_wake(client->irq) == 0; |
| else if (input->users) |
| mip4_disable(ts); |
| |
| mutex_unlock(&input->mutex); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused mip4_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mip4_ts *ts = i2c_get_clientdata(client); |
| struct input_dev *input = ts->input; |
| |
| mutex_lock(&input->mutex); |
| |
| if (ts->wake_irq_enabled) |
| disable_irq_wake(client->irq); |
| else if (input->users) |
| mip4_enable(ts); |
| |
| mutex_unlock(&input->mutex); |
| |
| return 0; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume); |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id mip4_of_match[] = { |
| { .compatible = "melfas,"MIP4_DEVICE_NAME, }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, mip4_of_match); |
| #endif |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_device_id mip4_acpi_match[] = { |
| { "MLFS0000", 0}, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(acpi, mip4_acpi_match); |
| #endif |
| |
| static const struct i2c_device_id mip4_i2c_ids[] = { |
| { MIP4_DEVICE_NAME, 0 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids); |
| |
| static struct i2c_driver mip4_driver = { |
| .id_table = mip4_i2c_ids, |
| .probe = mip4_probe, |
| .driver = { |
| .name = MIP4_DEVICE_NAME, |
| .of_match_table = of_match_ptr(mip4_of_match), |
| .acpi_match_table = ACPI_PTR(mip4_acpi_match), |
| .pm = &mip4_pm_ops, |
| }, |
| }; |
| module_i2c_driver(mip4_driver); |
| |
| MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen"); |
| MODULE_VERSION("2016.03.03"); |
| MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>"); |
| MODULE_LICENSE("GPL"); |