1578 lines
37 KiB
C
1578 lines
37 KiB
C
/*
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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 <jeesw@melfas.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 4.6
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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_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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char ic_name[4];
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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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int error;
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u8 cmd[2];
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u8 buf[14];
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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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/* 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_state(ts->input, MT_TOOL_FINGER, 0);
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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 hover;
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bool palm;
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bool state;
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u16 x, y;
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u8 pressure_stage = 0;
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u8 pressure;
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u8 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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case 3:
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default:
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/* 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 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_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_ic_name.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("2016.09.28");
|
|
MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>");
|
|
MODULE_LICENSE("GPL");
|