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1606 lines
38 KiB
1606 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* MELFAS MIP4 Touchscreen |
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* |
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* Copyright (C) 2016 MELFAS Inc. |
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* |
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* Author : Sangwon Jee <[email protected]> |
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*/ |
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#include <linux/acpi.h> |
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#include <linux/delay.h> |
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#include <linux/firmware.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/input.h> |
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#include <linux/input/mt.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/slab.h> |
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#include <asm/unaligned.h> |
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#define MIP4_DEVICE_NAME "mip4_ts" |
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/***************************************************************** |
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* Protocol |
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* Version : MIP 4.0 Rev 5.4 |
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*****************************************************************/ |
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/* Address */ |
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#define MIP4_R0_BOOT 0x00 |
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#define MIP4_R1_BOOT_MODE 0x01 |
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#define MIP4_R1_BOOT_BUF_ADDR 0x10 |
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#define MIP4_R1_BOOT_STATUS 0x20 |
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#define MIP4_R1_BOOT_CMD 0x30 |
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#define MIP4_R1_BOOT_TARGET_ADDR 0x40 |
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#define MIP4_R1_BOOT_SIZE 0x44 |
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#define MIP4_R0_INFO 0x01 |
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#define MIP4_R1_INFO_PRODUCT_NAME 0x00 |
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#define MIP4_R1_INFO_RESOLUTION_X 0x10 |
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#define MIP4_R1_INFO_RESOLUTION_Y 0x12 |
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#define MIP4_R1_INFO_NODE_NUM_X 0x14 |
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#define MIP4_R1_INFO_NODE_NUM_Y 0x15 |
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#define MIP4_R1_INFO_KEY_NUM 0x16 |
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#define MIP4_R1_INFO_PRESSURE_NUM 0x17 |
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#define MIP4_R1_INFO_LENGTH_X 0x18 |
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#define MIP4_R1_INFO_LENGTH_Y 0x1A |
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#define MIP4_R1_INFO_PPM_X 0x1C |
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#define MIP4_R1_INFO_PPM_Y 0x1D |
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#define MIP4_R1_INFO_VERSION_BOOT 0x20 |
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#define MIP4_R1_INFO_VERSION_CORE 0x22 |
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#define MIP4_R1_INFO_VERSION_APP 0x24 |
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#define MIP4_R1_INFO_VERSION_PARAM 0x26 |
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#define MIP4_R1_INFO_SECT_BOOT_START 0x30 |
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#define MIP4_R1_INFO_SECT_BOOT_END 0x31 |
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#define MIP4_R1_INFO_SECT_CORE_START 0x32 |
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#define MIP4_R1_INFO_SECT_CORE_END 0x33 |
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#define MIP4_R1_INFO_SECT_APP_START 0x34 |
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#define MIP4_R1_INFO_SECT_APP_END 0x35 |
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#define MIP4_R1_INFO_SECT_PARAM_START 0x36 |
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#define MIP4_R1_INFO_SECT_PARAM_END 0x37 |
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#define MIP4_R1_INFO_BUILD_DATE 0x40 |
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#define MIP4_R1_INFO_BUILD_TIME 0x44 |
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#define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48 |
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#define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A |
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#define MIP4_R1_INFO_PROTOCOL_NAME 0x50 |
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#define MIP4_R1_INFO_PROTOCOL_VERSION 0x58 |
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#define MIP4_R1_INFO_IC_ID 0x70 |
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#define MIP4_R1_INFO_IC_NAME 0x71 |
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#define MIP4_R1_INFO_IC_VENDOR_ID 0x75 |
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#define MIP4_R1_INFO_IC_HW_CATEGORY 0x77 |
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#define MIP4_R1_INFO_CONTACT_THD_SCR 0x78 |
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#define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A |
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#define MIP4_R1_INFO_PID 0x7C |
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#define MIP4_R1_INFO_VID 0x7E |
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#define MIP4_R1_INFO_SLAVE_ADDR 0x80 |
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#define MIP4_R0_EVENT 0x02 |
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#define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00 |
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#define MIP4_R1_EVENT_FORMAT 0x04 |
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#define MIP4_R1_EVENT_SIZE 0x06 |
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#define MIP4_R1_EVENT_PACKET_INFO 0x10 |
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#define MIP4_R1_EVENT_PACKET_DATA 0x11 |
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#define MIP4_R0_CTRL 0x06 |
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#define MIP4_R1_CTRL_READY_STATUS 0x00 |
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#define MIP4_R1_CTRL_EVENT_READY 0x01 |
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#define MIP4_R1_CTRL_MODE 0x10 |
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#define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11 |
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#define MIP4_R1_CTRL_RECALIBRATE 0x12 |
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#define MIP4_R1_CTRL_POWER_STATE 0x13 |
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#define MIP4_R1_CTRL_GESTURE_TYPE 0x14 |
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#define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18 |
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#define MIP4_R1_CTRL_CHARGER_MODE 0x19 |
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#define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A |
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#define MIP4_R1_CTRL_WINDOW_MODE 0x1B |
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#define MIP4_R1_CTRL_PALM_REJECTION 0x1C |
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#define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D |
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#define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E |
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#define MIP4_R1_CTRL_I2C_ON_LPM 0x1F |
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#define MIP4_R1_CTRL_GESTURE_DEBUG 0x20 |
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#define MIP4_R1_CTRL_PALM_EVENT 0x22 |
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#define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23 |
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/* Value */ |
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#define MIP4_BOOT_MODE_BOOT 0x01 |
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#define MIP4_BOOT_MODE_APP 0x02 |
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#define MIP4_BOOT_STATUS_BUSY 0x05 |
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#define MIP4_BOOT_STATUS_ERROR 0x0E |
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#define MIP4_BOOT_STATUS_DONE 0xA0 |
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#define MIP4_BOOT_CMD_MASS_ERASE 0x15 |
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#define MIP4_BOOT_CMD_PROGRAM 0x54 |
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#define MIP4_BOOT_CMD_ERASE 0x8F |
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#define MIP4_BOOT_CMD_WRITE 0xA5 |
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#define MIP4_BOOT_CMD_READ 0xC2 |
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#define MIP4_EVENT_INPUT_TYPE_KEY 0 |
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#define MIP4_EVENT_INPUT_TYPE_SCREEN 1 |
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#define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2 |
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#define I2C_RETRY_COUNT 3 /* 2~ */ |
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#define MIP4_BUF_SIZE 128 |
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#define MIP4_MAX_FINGERS 10 |
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#define MIP4_MAX_KEYS 4 |
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#define MIP4_TOUCH_MAJOR_MIN 0 |
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#define MIP4_TOUCH_MAJOR_MAX 255 |
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#define MIP4_TOUCH_MINOR_MIN 0 |
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#define MIP4_TOUCH_MINOR_MAX 255 |
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#define MIP4_PRESSURE_MIN 0 |
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#define MIP4_PRESSURE_MAX 255 |
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#define MIP4_FW_NAME "melfas_mip4.fw" |
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#define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */ |
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struct mip4_fw_version { |
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u16 boot; |
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u16 core; |
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u16 app; |
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u16 param; |
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}; |
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struct mip4_ts { |
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struct i2c_client *client; |
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struct input_dev *input; |
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struct gpio_desc *gpio_ce; |
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char phys[32]; |
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char product_name[16]; |
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u16 product_id; |
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char ic_name[4]; |
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char fw_name[32]; |
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unsigned int max_x; |
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unsigned int max_y; |
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u8 node_x; |
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u8 node_y; |
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u8 node_key; |
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unsigned int ppm_x; |
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unsigned int ppm_y; |
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struct mip4_fw_version fw_version; |
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unsigned int event_size; |
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unsigned int event_format; |
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unsigned int key_num; |
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unsigned short key_code[MIP4_MAX_KEYS]; |
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bool wake_irq_enabled; |
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u8 buf[MIP4_BUF_SIZE]; |
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}; |
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static int mip4_i2c_xfer(struct mip4_ts *ts, |
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char *write_buf, unsigned int write_len, |
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char *read_buf, unsigned int read_len) |
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{ |
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struct i2c_msg msg[] = { |
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{ |
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.addr = ts->client->addr, |
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.flags = 0, |
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.buf = write_buf, |
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.len = write_len, |
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}, { |
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.addr = ts->client->addr, |
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.flags = I2C_M_RD, |
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.buf = read_buf, |
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.len = read_len, |
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}, |
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}; |
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int retry = I2C_RETRY_COUNT; |
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int res; |
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int error; |
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do { |
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res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); |
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if (res == ARRAY_SIZE(msg)) |
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return 0; |
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error = res < 0 ? res : -EIO; |
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dev_err(&ts->client->dev, |
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"%s - i2c_transfer failed: %d (%d)\n", |
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__func__, error, res); |
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} while (--retry); |
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return error; |
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} |
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static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v) |
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{ |
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v->boot = get_unaligned_le16(buf + 0); |
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v->core = get_unaligned_le16(buf + 2); |
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v->app = get_unaligned_le16(buf + 4); |
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v->param = get_unaligned_le16(buf + 6); |
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} |
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/* |
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* Read chip firmware version |
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*/ |
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static int mip4_get_fw_version(struct mip4_ts *ts) |
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{ |
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u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT }; |
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u8 buf[sizeof(ts->fw_version)]; |
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int error; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf)); |
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if (error) { |
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memset(&ts->fw_version, 0xff, sizeof(ts->fw_version)); |
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return error; |
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} |
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mip4_parse_fw_version(buf, &ts->fw_version); |
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return 0; |
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} |
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/* |
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* Fetch device characteristics |
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*/ |
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static int mip4_query_device(struct mip4_ts *ts) |
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{ |
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union i2c_smbus_data dummy; |
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int error; |
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u8 cmd[2]; |
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u8 buf[14]; |
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/* |
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* Make sure there is something at this address as we do not |
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* consider subsequent failures as fatal. |
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*/ |
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if (i2c_smbus_xfer(ts->client->adapter, ts->client->addr, |
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0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { |
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dev_err(&ts->client->dev, "nothing at this address\n"); |
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return -ENXIO; |
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} |
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/* Product name */ |
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cmd[0] = MIP4_R0_INFO; |
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cmd[1] = MIP4_R1_INFO_PRODUCT_NAME; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), |
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ts->product_name, sizeof(ts->product_name)); |
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if (error) |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve product name: %d\n", error); |
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else |
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dev_dbg(&ts->client->dev, "product name: %.*s\n", |
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(int)sizeof(ts->product_name), ts->product_name); |
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/* Product ID */ |
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cmd[0] = MIP4_R0_INFO; |
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cmd[1] = MIP4_R1_INFO_PID; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 2); |
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if (error) { |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve product id: %d\n", error); |
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} else { |
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ts->product_id = get_unaligned_le16(&buf[0]); |
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dev_dbg(&ts->client->dev, "product id: %04X\n", ts->product_id); |
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} |
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/* Firmware name */ |
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snprintf(ts->fw_name, sizeof(ts->fw_name), |
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"melfas_mip4_%04X.fw", ts->product_id); |
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dev_dbg(&ts->client->dev, "firmware name: %s\n", ts->fw_name); |
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/* IC name */ |
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cmd[0] = MIP4_R0_INFO; |
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cmd[1] = MIP4_R1_INFO_IC_NAME; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), |
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ts->ic_name, sizeof(ts->ic_name)); |
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if (error) |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve IC name: %d\n", error); |
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else |
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dev_dbg(&ts->client->dev, "IC name: %.*s\n", |
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(int)sizeof(ts->ic_name), ts->ic_name); |
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/* Firmware version */ |
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error = mip4_get_fw_version(ts); |
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if (error) |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve FW version: %d\n", error); |
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else |
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dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n", |
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ts->fw_version.boot, ts->fw_version.core, |
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ts->fw_version.app, ts->fw_version.param); |
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/* Resolution */ |
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cmd[0] = MIP4_R0_INFO; |
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cmd[1] = MIP4_R1_INFO_RESOLUTION_X; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14); |
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if (error) { |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve touchscreen parameters: %d\n", |
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error); |
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} else { |
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ts->max_x = get_unaligned_le16(&buf[0]); |
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ts->max_y = get_unaligned_le16(&buf[2]); |
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dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n", |
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ts->max_x, ts->max_y); |
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ts->node_x = buf[4]; |
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ts->node_y = buf[5]; |
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ts->node_key = buf[6]; |
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dev_dbg(&ts->client->dev, |
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"node_x: %d, node_y: %d, node_key: %d\n", |
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ts->node_x, ts->node_y, ts->node_key); |
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ts->ppm_x = buf[12]; |
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ts->ppm_y = buf[13]; |
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dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n", |
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ts->ppm_x, ts->ppm_y); |
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/* Key ts */ |
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if (ts->node_key > 0) |
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ts->key_num = ts->node_key; |
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} |
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/* Protocol */ |
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cmd[0] = MIP4_R0_EVENT; |
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cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC; |
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error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7); |
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if (error) { |
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dev_warn(&ts->client->dev, |
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"Failed to retrieve device type: %d\n", error); |
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ts->event_format = 0xff; |
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} else { |
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ts->event_format = get_unaligned_le16(&buf[4]); |
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ts->event_size = buf[6]; |
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dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n", |
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ts->event_format, ts->event_size); |
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if (ts->event_format == 2 || ts->event_format > 3) |
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dev_warn(&ts->client->dev, |
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"Unknown event format %d\n", ts->event_format); |
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} |
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return 0; |
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} |
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static int mip4_power_on(struct mip4_ts *ts) |
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{ |
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if (ts->gpio_ce) { |
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gpiod_set_value_cansleep(ts->gpio_ce, 1); |
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/* Booting delay : 200~300ms */ |
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usleep_range(200 * 1000, 300 * 1000); |
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} |
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return 0; |
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} |
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static void mip4_power_off(struct mip4_ts *ts) |
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{ |
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if (ts->gpio_ce) |
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gpiod_set_value_cansleep(ts->gpio_ce, 0); |
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} |
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/* |
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* Clear touch input event status |
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*/ |
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static void mip4_clear_input(struct mip4_ts *ts) |
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{ |
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int i; |
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/* Screen */ |
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for (i = 0; i < MIP4_MAX_FINGERS; i++) { |
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input_mt_slot(ts->input, i); |
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input_mt_report_slot_inactive(ts->input); |
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} |
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/* Keys */ |
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for (i = 0; i < ts->key_num; i++) |
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input_report_key(ts->input, ts->key_code[i], 0); |
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input_sync(ts->input); |
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} |
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static int mip4_enable(struct mip4_ts *ts) |
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{ |
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int error; |
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error = mip4_power_on(ts); |
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if (error) |
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return error; |
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enable_irq(ts->client->irq); |
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return 0; |
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} |
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static void mip4_disable(struct mip4_ts *ts) |
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{ |
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disable_irq(ts->client->irq); |
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mip4_power_off(ts); |
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mip4_clear_input(ts); |
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} |
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/***************************************************************** |
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* Input handling |
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*****************************************************************/ |
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static void mip4_report_keys(struct mip4_ts *ts, u8 *packet) |
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{ |
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u8 key; |
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bool down; |
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switch (ts->event_format) { |
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case 0: |
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case 1: |
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key = packet[0] & 0x0F; |
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down = packet[0] & 0x80; |
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break; |
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case 3: |
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default: |
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key = packet[0] & 0x0F; |
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down = packet[1] & 0x01; |
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break; |
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} |
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/* Report key event */ |
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if (key >= 1 && key <= ts->key_num) { |
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unsigned short keycode = ts->key_code[key - 1]; |
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dev_dbg(&ts->client->dev, |
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"Key - ID: %d, keycode: %d, state: %d\n", |
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key, keycode, down); |
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input_event(ts->input, EV_MSC, MSC_SCAN, keycode); |
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input_report_key(ts->input, keycode, down); |
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} else { |
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dev_err(&ts->client->dev, "Unknown key: %d\n", key); |
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} |
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} |
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static void mip4_report_touch(struct mip4_ts *ts, u8 *packet) |
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{ |
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int id; |
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bool __always_unused hover; |
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bool __always_unused palm; |
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bool state; |
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u16 x, y; |
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u8 __always_unused pressure_stage = 0; |
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u8 pressure; |
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u8 __always_unused size; |
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u8 touch_major; |
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u8 touch_minor; |
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switch (ts->event_format) { |
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case 0: |
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case 1: |
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/* Touch only */ |
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state = packet[0] & BIT(7); |
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hover = packet[0] & BIT(5); |
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palm = packet[0] & BIT(4); |
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id = (packet[0] & 0x0F) - 1; |
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x = ((packet[1] & 0x0F) << 8) | packet[2]; |
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y = (((packet[1] >> 4) & 0x0F) << 8) | |
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packet[3]; |
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pressure = packet[4]; |
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size = packet[5]; |
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if (ts->event_format == 0) { |
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touch_major = packet[5]; |
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touch_minor = packet[5]; |
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} else { |
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touch_major = packet[6]; |
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touch_minor = packet[7]; |
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} |
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break; |
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|
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case 3: |
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default: |
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/* Touch + Force(Pressure) */ |
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id = (packet[0] & 0x0F) - 1; |
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hover = packet[1] & BIT(2); |
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palm = packet[1] & BIT(1); |
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state = packet[1] & BIT(0); |
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x = ((packet[2] & 0x0F) << 8) | packet[3]; |
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y = (((packet[2] >> 4) & 0x0F) << 8) | |
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packet[4]; |
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size = packet[6]; |
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pressure_stage = (packet[7] & 0xF0) >> 4; |
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pressure = ((packet[7] & 0x0F) << 8) | |
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packet[8]; |
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touch_major = packet[9]; |
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touch_minor = packet[10]; |
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break; |
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} |
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|
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dev_dbg(&ts->client->dev, |
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"Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n", |
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id, state, x, y, pressure); |
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|
|
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_inactive(ts->input); |
|
} |
|
|
|
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 (input_device_enabled(ts->input)) { |
|
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 (input_device_enabled(ts->input)) |
|
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, ts->fw_name, dev); |
|
if (error) { |
|
dev_err(&ts->client->dev, |
|
"Failed to retrieve firmware %s: %d\n", |
|
ts->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 ssize_t mip4_sysfs_read_hw_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); |
|
|
|
/* |
|
* product_name shows the name or version of the hardware |
|
* paired with current firmware in the chip. |
|
*/ |
|
count = snprintf(buf, PAGE_SIZE, "%.*s\n", |
|
(int)sizeof(ts->product_name), ts->product_name); |
|
|
|
mutex_unlock(&ts->input->mutex); |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL); |
|
|
|
static ssize_t mip4_sysfs_read_product_id(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; |
|
|
|
mutex_lock(&ts->input->mutex); |
|
|
|
count = snprintf(buf, PAGE_SIZE, "%04X\n", ts->product_id); |
|
|
|
mutex_unlock(&ts->input->mutex); |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL); |
|
|
|
static ssize_t mip4_sysfs_read_ic_name(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; |
|
|
|
mutex_lock(&ts->input->mutex); |
|
|
|
count = snprintf(buf, PAGE_SIZE, "%.*s\n", |
|
(int)sizeof(ts->ic_name), ts->ic_name); |
|
|
|
mutex_unlock(&ts->input->mutex); |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL); |
|
|
|
static struct attribute *mip4_attrs[] = { |
|
&dev_attr_fw_version.attr, |
|
&dev_attr_hw_version.attr, |
|
&dev_attr_product_id.attr, |
|
&dev_attr_ic_name.attr, |
|
&dev_attr_update_fw.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group mip4_attr_group = { |
|
.attrs = mip4_attrs, |
|
}; |
|
|
|
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->id.product = ts->product_id; |
|
|
|
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 = devm_device_add_group(&client->dev, &mip4_attr_group); |
|
if (error) { |
|
dev_err(&client->dev, |
|
"Failed to create sysfs attribute group: %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_device_enabled(input)) |
|
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_device_enabled(input)) |
|
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_AUTHOR("Sangwon Jee <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|