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1472 lines
37 KiB
1472 lines
37 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2012 Simon Budig, <[email protected]> |
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* Daniel Wagener <[email protected]> (M09 firmware support) |
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* Lothar Waßmann <[email protected]> (DT support) |
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*/ |
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|
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/* |
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* This is a driver for the EDT "Polytouch" family of touch controllers |
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* based on the FocalTech FT5x06 line of chips. |
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* |
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* Development of this driver has been sponsored by Glyn: |
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* http://www.glyn.com/Products/Displays |
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*/ |
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|
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#include <linux/debugfs.h> |
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#include <linux/delay.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/input.h> |
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#include <linux/input/mt.h> |
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#include <linux/input/touchscreen.h> |
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#include <linux/irq.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/ratelimit.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/slab.h> |
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#include <linux/uaccess.h> |
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|
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#include <asm/unaligned.h> |
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|
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#define WORK_REGISTER_THRESHOLD 0x00 |
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#define WORK_REGISTER_REPORT_RATE 0x08 |
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#define WORK_REGISTER_GAIN 0x30 |
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#define WORK_REGISTER_OFFSET 0x31 |
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#define WORK_REGISTER_NUM_X 0x33 |
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#define WORK_REGISTER_NUM_Y 0x34 |
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|
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#define PMOD_REGISTER_ACTIVE 0x00 |
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#define PMOD_REGISTER_HIBERNATE 0x03 |
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|
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#define M09_REGISTER_THRESHOLD 0x80 |
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#define M09_REGISTER_GAIN 0x92 |
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#define M09_REGISTER_OFFSET 0x93 |
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#define M09_REGISTER_NUM_X 0x94 |
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#define M09_REGISTER_NUM_Y 0x95 |
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|
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#define EV_REGISTER_THRESHOLD 0x40 |
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#define EV_REGISTER_GAIN 0x41 |
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#define EV_REGISTER_OFFSET_Y 0x45 |
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#define EV_REGISTER_OFFSET_X 0x46 |
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|
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#define NO_REGISTER 0xff |
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|
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#define WORK_REGISTER_OPMODE 0x3c |
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#define FACTORY_REGISTER_OPMODE 0x01 |
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#define PMOD_REGISTER_OPMODE 0xa5 |
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|
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#define TOUCH_EVENT_DOWN 0x00 |
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#define TOUCH_EVENT_UP 0x01 |
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#define TOUCH_EVENT_ON 0x02 |
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#define TOUCH_EVENT_RESERVED 0x03 |
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|
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#define EDT_NAME_LEN 23 |
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#define EDT_SWITCH_MODE_RETRIES 10 |
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#define EDT_SWITCH_MODE_DELAY 5 /* msec */ |
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#define EDT_RAW_DATA_RETRIES 100 |
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#define EDT_RAW_DATA_DELAY 1000 /* usec */ |
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|
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#define EDT_DEFAULT_NUM_X 1024 |
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#define EDT_DEFAULT_NUM_Y 1024 |
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|
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#define POLL_INTERVAL_MS 17 /* 17ms = 60fps */ |
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|
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enum edt_pmode { |
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EDT_PMODE_NOT_SUPPORTED, |
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EDT_PMODE_HIBERNATE, |
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EDT_PMODE_POWEROFF, |
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}; |
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|
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enum edt_ver { |
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EDT_M06, |
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EDT_M09, |
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EDT_M12, |
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EV_FT, |
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GENERIC_FT, |
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}; |
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|
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struct edt_reg_addr { |
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int reg_threshold; |
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int reg_report_rate; |
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int reg_gain; |
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int reg_offset; |
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int reg_offset_x; |
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int reg_offset_y; |
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int reg_num_x; |
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int reg_num_y; |
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}; |
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|
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struct edt_ft5x06_ts_data { |
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struct i2c_client *client; |
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struct input_dev *input; |
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struct touchscreen_properties prop; |
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u16 num_x; |
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u16 num_y; |
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struct regulator *vcc; |
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struct regulator *iovcc; |
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|
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struct gpio_desc *reset_gpio; |
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struct gpio_desc *wake_gpio; |
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|
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#if defined(CONFIG_DEBUG_FS) |
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struct dentry *debug_dir; |
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u8 *raw_buffer; |
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size_t raw_bufsize; |
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#endif |
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|
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struct mutex mutex; |
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bool factory_mode; |
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enum edt_pmode suspend_mode; |
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int threshold; |
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int gain; |
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int offset; |
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int offset_x; |
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int offset_y; |
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int report_rate; |
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int max_support_points; |
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|
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char name[EDT_NAME_LEN]; |
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|
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struct edt_reg_addr reg_addr; |
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enum edt_ver version; |
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|
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struct timer_list timer; |
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struct work_struct work_i2c_poll; |
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}; |
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struct edt_i2c_chip_data { |
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int max_support_points; |
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}; |
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static int edt_ft5x06_ts_readwrite(struct i2c_client *client, |
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u16 wr_len, u8 *wr_buf, |
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u16 rd_len, u8 *rd_buf) |
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{ |
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struct i2c_msg wrmsg[2]; |
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int i = 0; |
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int ret; |
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if (wr_len) { |
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wrmsg[i].addr = client->addr; |
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wrmsg[i].flags = 0; |
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wrmsg[i].len = wr_len; |
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wrmsg[i].buf = wr_buf; |
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i++; |
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} |
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if (rd_len) { |
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wrmsg[i].addr = client->addr; |
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wrmsg[i].flags = I2C_M_RD; |
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wrmsg[i].len = rd_len; |
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wrmsg[i].buf = rd_buf; |
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i++; |
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} |
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|
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ret = i2c_transfer(client->adapter, wrmsg, i); |
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if (ret < 0) |
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return ret; |
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if (ret != i) |
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return -EIO; |
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|
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return 0; |
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} |
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static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, |
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u8 *buf, int buflen) |
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{ |
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int i; |
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u8 crc = 0; |
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|
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for (i = 0; i < buflen - 1; i++) |
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crc ^= buf[i]; |
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|
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if (crc != buf[buflen-1]) { |
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dev_err_ratelimited(&tsdata->client->dev, |
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"crc error: 0x%02x expected, got 0x%02x\n", |
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crc, buf[buflen-1]); |
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return false; |
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} |
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|
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return true; |
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} |
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static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) |
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{ |
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struct edt_ft5x06_ts_data *tsdata = dev_id; |
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struct device *dev = &tsdata->client->dev; |
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u8 cmd; |
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u8 rdbuf[63]; |
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int i, type, x, y, id; |
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int offset, tplen, datalen, crclen; |
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int error; |
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|
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switch (tsdata->version) { |
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case EDT_M06: |
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cmd = 0xf9; /* tell the controller to send touch data */ |
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offset = 5; /* where the actual touch data starts */ |
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tplen = 4; /* data comes in so called frames */ |
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crclen = 1; /* length of the crc data */ |
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break; |
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|
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case EDT_M09: |
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case EDT_M12: |
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case EV_FT: |
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case GENERIC_FT: |
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cmd = 0x0; |
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offset = 3; |
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tplen = 6; |
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crclen = 0; |
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break; |
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|
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default: |
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goto out; |
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} |
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|
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memset(rdbuf, 0, sizeof(rdbuf)); |
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datalen = tplen * tsdata->max_support_points + offset + crclen; |
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|
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error = edt_ft5x06_ts_readwrite(tsdata->client, |
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sizeof(cmd), &cmd, |
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datalen, rdbuf); |
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if (error) { |
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dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", |
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error); |
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goto out; |
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} |
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|
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/* M09/M12 does not send header or CRC */ |
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if (tsdata->version == EDT_M06) { |
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if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || |
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rdbuf[2] != datalen) { |
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dev_err_ratelimited(dev, |
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"Unexpected header: %02x%02x%02x!\n", |
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rdbuf[0], rdbuf[1], rdbuf[2]); |
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goto out; |
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} |
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if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen)) |
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goto out; |
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} |
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for (i = 0; i < tsdata->max_support_points; i++) { |
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u8 *buf = &rdbuf[i * tplen + offset]; |
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|
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type = buf[0] >> 6; |
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/* ignore Reserved events */ |
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if (type == TOUCH_EVENT_RESERVED) |
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continue; |
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/* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ |
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if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) |
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continue; |
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x = get_unaligned_be16(buf) & 0x0fff; |
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y = get_unaligned_be16(buf + 2) & 0x0fff; |
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/* The FT5x26 send the y coordinate first */ |
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if (tsdata->version == EV_FT) |
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swap(x, y); |
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id = (buf[2] >> 4) & 0x0f; |
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input_mt_slot(tsdata->input, id); |
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if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, |
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type != TOUCH_EVENT_UP)) |
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touchscreen_report_pos(tsdata->input, &tsdata->prop, |
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x, y, true); |
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} |
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input_mt_report_pointer_emulation(tsdata->input, true); |
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input_sync(tsdata->input); |
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out: |
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return IRQ_HANDLED; |
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} |
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static void edt_ft5x06_ts_irq_poll_timer(struct timer_list *t) |
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{ |
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struct edt_ft5x06_ts_data *tsdata = from_timer(tsdata, t, timer); |
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|
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schedule_work(&tsdata->work_i2c_poll); |
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mod_timer(&tsdata->timer, jiffies + msecs_to_jiffies(POLL_INTERVAL_MS)); |
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} |
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static void edt_ft5x06_ts_work_i2c_poll(struct work_struct *work) |
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{ |
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struct edt_ft5x06_ts_data *tsdata = container_of(work, |
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struct edt_ft5x06_ts_data, work_i2c_poll); |
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edt_ft5x06_ts_isr(0, tsdata); |
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} |
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static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, |
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u8 addr, u8 value) |
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{ |
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u8 wrbuf[4]; |
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switch (tsdata->version) { |
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case EDT_M06: |
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wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; |
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wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; |
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wrbuf[2] = value; |
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wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; |
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return edt_ft5x06_ts_readwrite(tsdata->client, 4, |
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wrbuf, 0, NULL); |
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|
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case EDT_M09: |
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case EDT_M12: |
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case EV_FT: |
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case GENERIC_FT: |
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wrbuf[0] = addr; |
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wrbuf[1] = value; |
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return edt_ft5x06_ts_readwrite(tsdata->client, 2, |
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wrbuf, 0, NULL); |
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|
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default: |
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return -EINVAL; |
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} |
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} |
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static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, |
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u8 addr) |
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{ |
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u8 wrbuf[2], rdbuf[2]; |
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int error; |
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|
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switch (tsdata->version) { |
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case EDT_M06: |
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wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; |
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wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; |
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wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; |
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|
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error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, |
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rdbuf); |
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if (error) |
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return error; |
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|
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if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { |
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dev_err(&tsdata->client->dev, |
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"crc error: 0x%02x expected, got 0x%02x\n", |
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wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], |
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rdbuf[1]); |
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return -EIO; |
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} |
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break; |
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|
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case EDT_M09: |
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case EDT_M12: |
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case EV_FT: |
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case GENERIC_FT: |
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wrbuf[0] = addr; |
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error = edt_ft5x06_ts_readwrite(tsdata->client, 1, |
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wrbuf, 1, rdbuf); |
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if (error) |
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return error; |
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break; |
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|
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default: |
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return -EINVAL; |
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} |
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|
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return rdbuf[0]; |
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} |
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struct edt_ft5x06_attribute { |
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struct device_attribute dattr; |
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size_t field_offset; |
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u8 limit_low; |
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u8 limit_high; |
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u8 addr_m06; |
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u8 addr_m09; |
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u8 addr_ev; |
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}; |
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|
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#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \ |
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_limit_low, _limit_high) \ |
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struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ |
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.dattr = __ATTR(_field, _mode, \ |
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edt_ft5x06_setting_show, \ |
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edt_ft5x06_setting_store), \ |
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.field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ |
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.addr_m06 = _addr_m06, \ |
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.addr_m09 = _addr_m09, \ |
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.addr_ev = _addr_ev, \ |
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.limit_low = _limit_low, \ |
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.limit_high = _limit_high, \ |
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} |
|
|
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static ssize_t edt_ft5x06_setting_show(struct device *dev, |
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struct device_attribute *dattr, |
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char *buf) |
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{ |
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struct i2c_client *client = to_i2c_client(dev); |
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); |
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struct edt_ft5x06_attribute *attr = |
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container_of(dattr, struct edt_ft5x06_attribute, dattr); |
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u8 *field = (u8 *)tsdata + attr->field_offset; |
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int val; |
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size_t count = 0; |
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int error = 0; |
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u8 addr; |
|
|
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mutex_lock(&tsdata->mutex); |
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|
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if (tsdata->factory_mode) { |
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error = -EIO; |
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goto out; |
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} |
|
|
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switch (tsdata->version) { |
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case EDT_M06: |
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addr = attr->addr_m06; |
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break; |
|
|
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case EDT_M09: |
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case EDT_M12: |
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case GENERIC_FT: |
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addr = attr->addr_m09; |
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break; |
|
|
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case EV_FT: |
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addr = attr->addr_ev; |
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break; |
|
|
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default: |
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error = -ENODEV; |
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goto out; |
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} |
|
|
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if (addr != NO_REGISTER) { |
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val = edt_ft5x06_register_read(tsdata, addr); |
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if (val < 0) { |
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error = val; |
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dev_err(&tsdata->client->dev, |
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"Failed to fetch attribute %s, error %d\n", |
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dattr->attr.name, error); |
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goto out; |
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} |
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} else { |
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val = *field; |
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} |
|
|
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if (val != *field) { |
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dev_warn(&tsdata->client->dev, |
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"%s: read (%d) and stored value (%d) differ\n", |
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dattr->attr.name, val, *field); |
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*field = val; |
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} |
|
|
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count = scnprintf(buf, PAGE_SIZE, "%d\n", val); |
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out: |
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mutex_unlock(&tsdata->mutex); |
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return error ?: count; |
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} |
|
|
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static ssize_t edt_ft5x06_setting_store(struct device *dev, |
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struct device_attribute *dattr, |
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const char *buf, size_t count) |
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{ |
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struct i2c_client *client = to_i2c_client(dev); |
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); |
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struct edt_ft5x06_attribute *attr = |
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container_of(dattr, struct edt_ft5x06_attribute, dattr); |
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u8 *field = (u8 *)tsdata + attr->field_offset; |
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unsigned int val; |
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int error; |
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u8 addr; |
|
|
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mutex_lock(&tsdata->mutex); |
|
|
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if (tsdata->factory_mode) { |
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error = -EIO; |
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goto out; |
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} |
|
|
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error = kstrtouint(buf, 0, &val); |
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if (error) |
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goto out; |
|
|
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if (val < attr->limit_low || val > attr->limit_high) { |
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error = -ERANGE; |
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goto out; |
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} |
|
|
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switch (tsdata->version) { |
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case EDT_M06: |
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addr = attr->addr_m06; |
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break; |
|
|
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case EDT_M09: |
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case EDT_M12: |
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case GENERIC_FT: |
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addr = attr->addr_m09; |
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break; |
|
|
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case EV_FT: |
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addr = attr->addr_ev; |
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break; |
|
|
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default: |
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error = -ENODEV; |
|
goto out; |
|
} |
|
|
|
if (addr != NO_REGISTER) { |
|
error = edt_ft5x06_register_write(tsdata, addr, val); |
|
if (error) { |
|
dev_err(&tsdata->client->dev, |
|
"Failed to update attribute %s, error: %d\n", |
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dattr->attr.name, error); |
|
goto out; |
|
} |
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} |
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*field = val; |
|
|
|
out: |
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mutex_unlock(&tsdata->mutex); |
|
return error ?: count; |
|
} |
|
|
|
/* m06, m09: range 0-31, m12: range 0-5 */ |
|
static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, |
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M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31); |
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/* m06, m09: range 0-31, m12: range 0-16 */ |
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static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, |
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M09_REGISTER_OFFSET, NO_REGISTER, 0, 31); |
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/* m06, m09, m12: no supported, ev_ft: range 0-80 */ |
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static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, |
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EV_REGISTER_OFFSET_X, 0, 80); |
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/* m06, m09, m12: no supported, ev_ft: range 0-80 */ |
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static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, |
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EV_REGISTER_OFFSET_Y, 0, 80); |
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/* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */ |
|
static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, |
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M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255); |
|
/* m06: range 3 to 14, m12: (0x64: 100Hz) */ |
|
static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, |
|
NO_REGISTER, NO_REGISTER, 0, 255); |
|
|
|
static struct attribute *edt_ft5x06_attrs[] = { |
|
&edt_ft5x06_attr_gain.dattr.attr, |
|
&edt_ft5x06_attr_offset.dattr.attr, |
|
&edt_ft5x06_attr_offset_x.dattr.attr, |
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&edt_ft5x06_attr_offset_y.dattr.attr, |
|
&edt_ft5x06_attr_threshold.dattr.attr, |
|
&edt_ft5x06_attr_report_rate.dattr.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group edt_ft5x06_attr_group = { |
|
.attrs = edt_ft5x06_attrs, |
|
}; |
|
|
|
static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct edt_reg_addr *reg_addr = &tsdata->reg_addr; |
|
|
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, |
|
tsdata->threshold); |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, |
|
tsdata->gain); |
|
if (reg_addr->reg_offset != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, |
|
tsdata->offset); |
|
if (reg_addr->reg_offset_x != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x, |
|
tsdata->offset_x); |
|
if (reg_addr->reg_offset_y != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y, |
|
tsdata->offset_y); |
|
if (reg_addr->reg_report_rate != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate, |
|
tsdata->report_rate); |
|
|
|
} |
|
|
|
#ifdef CONFIG_DEBUG_FS |
|
static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct i2c_client *client = tsdata->client; |
|
int retries = EDT_SWITCH_MODE_RETRIES; |
|
int ret; |
|
int error; |
|
|
|
if (tsdata->version != EDT_M06) { |
|
dev_err(&client->dev, |
|
"No factory mode support for non-M06 devices\n"); |
|
return -EINVAL; |
|
} |
|
|
|
disable_irq(client->irq); |
|
|
|
if (!tsdata->raw_buffer) { |
|
tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * |
|
sizeof(u16); |
|
tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); |
|
if (!tsdata->raw_buffer) { |
|
error = -ENOMEM; |
|
goto err_out; |
|
} |
|
} |
|
|
|
/* mode register is 0x3c when in the work mode */ |
|
error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); |
|
if (error) { |
|
dev_err(&client->dev, |
|
"failed to switch to factory mode, error %d\n", error); |
|
goto err_out; |
|
} |
|
|
|
tsdata->factory_mode = true; |
|
do { |
|
mdelay(EDT_SWITCH_MODE_DELAY); |
|
/* mode register is 0x01 when in factory mode */ |
|
ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE); |
|
if (ret == 0x03) |
|
break; |
|
} while (--retries > 0); |
|
|
|
if (retries == 0) { |
|
dev_err(&client->dev, "not in factory mode after %dms.\n", |
|
EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); |
|
error = -EIO; |
|
goto err_out; |
|
} |
|
|
|
return 0; |
|
|
|
err_out: |
|
kfree(tsdata->raw_buffer); |
|
tsdata->raw_buffer = NULL; |
|
tsdata->factory_mode = false; |
|
enable_irq(client->irq); |
|
|
|
return error; |
|
} |
|
|
|
static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct i2c_client *client = tsdata->client; |
|
int retries = EDT_SWITCH_MODE_RETRIES; |
|
int ret; |
|
int error; |
|
|
|
/* mode register is 0x01 when in the factory mode */ |
|
error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1); |
|
if (error) { |
|
dev_err(&client->dev, |
|
"failed to switch to work mode, error: %d\n", error); |
|
return error; |
|
} |
|
|
|
tsdata->factory_mode = false; |
|
|
|
do { |
|
mdelay(EDT_SWITCH_MODE_DELAY); |
|
/* mode register is 0x01 when in factory mode */ |
|
ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE); |
|
if (ret == 0x01) |
|
break; |
|
} while (--retries > 0); |
|
|
|
if (retries == 0) { |
|
dev_err(&client->dev, "not in work mode after %dms.\n", |
|
EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); |
|
tsdata->factory_mode = true; |
|
return -EIO; |
|
} |
|
|
|
kfree(tsdata->raw_buffer); |
|
tsdata->raw_buffer = NULL; |
|
|
|
edt_ft5x06_restore_reg_parameters(tsdata); |
|
enable_irq(client->irq); |
|
|
|
return 0; |
|
} |
|
|
|
static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) |
|
{ |
|
struct edt_ft5x06_ts_data *tsdata = data; |
|
|
|
*mode = tsdata->factory_mode; |
|
|
|
return 0; |
|
}; |
|
|
|
static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) |
|
{ |
|
struct edt_ft5x06_ts_data *tsdata = data; |
|
int retval = 0; |
|
|
|
if (mode > 1) |
|
return -ERANGE; |
|
|
|
mutex_lock(&tsdata->mutex); |
|
|
|
if (mode != tsdata->factory_mode) { |
|
retval = mode ? edt_ft5x06_factory_mode(tsdata) : |
|
edt_ft5x06_work_mode(tsdata); |
|
} |
|
|
|
mutex_unlock(&tsdata->mutex); |
|
|
|
return retval; |
|
}; |
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, |
|
edt_ft5x06_debugfs_mode_set, "%llu\n"); |
|
|
|
static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, |
|
char __user *buf, size_t count, loff_t *off) |
|
{ |
|
struct edt_ft5x06_ts_data *tsdata = file->private_data; |
|
struct i2c_client *client = tsdata->client; |
|
int retries = EDT_RAW_DATA_RETRIES; |
|
int val, i, error; |
|
size_t read = 0; |
|
int colbytes; |
|
char wrbuf[3]; |
|
u8 *rdbuf; |
|
|
|
if (*off < 0 || *off >= tsdata->raw_bufsize) |
|
return 0; |
|
|
|
mutex_lock(&tsdata->mutex); |
|
|
|
if (!tsdata->factory_mode || !tsdata->raw_buffer) { |
|
error = -EIO; |
|
goto out; |
|
} |
|
|
|
error = edt_ft5x06_register_write(tsdata, 0x08, 0x01); |
|
if (error) { |
|
dev_dbg(&client->dev, |
|
"failed to write 0x08 register, error %d\n", error); |
|
goto out; |
|
} |
|
|
|
do { |
|
usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); |
|
val = edt_ft5x06_register_read(tsdata, 0x08); |
|
if (val < 1) |
|
break; |
|
} while (--retries > 0); |
|
|
|
if (val < 0) { |
|
error = val; |
|
dev_dbg(&client->dev, |
|
"failed to read 0x08 register, error %d\n", error); |
|
goto out; |
|
} |
|
|
|
if (retries == 0) { |
|
dev_dbg(&client->dev, |
|
"timed out waiting for register to settle\n"); |
|
error = -ETIMEDOUT; |
|
goto out; |
|
} |
|
|
|
rdbuf = tsdata->raw_buffer; |
|
colbytes = tsdata->num_y * sizeof(u16); |
|
|
|
wrbuf[0] = 0xf5; |
|
wrbuf[1] = 0x0e; |
|
for (i = 0; i < tsdata->num_x; i++) { |
|
wrbuf[2] = i; /* column index */ |
|
error = edt_ft5x06_ts_readwrite(tsdata->client, |
|
sizeof(wrbuf), wrbuf, |
|
colbytes, rdbuf); |
|
if (error) |
|
goto out; |
|
|
|
rdbuf += colbytes; |
|
} |
|
|
|
read = min_t(size_t, count, tsdata->raw_bufsize - *off); |
|
if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { |
|
error = -EFAULT; |
|
goto out; |
|
} |
|
|
|
*off += read; |
|
out: |
|
mutex_unlock(&tsdata->mutex); |
|
return error ?: read; |
|
}; |
|
|
|
static const struct file_operations debugfs_raw_data_fops = { |
|
.open = simple_open, |
|
.read = edt_ft5x06_debugfs_raw_data_read, |
|
}; |
|
|
|
static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, |
|
const char *debugfs_name) |
|
{ |
|
tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); |
|
|
|
debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); |
|
debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); |
|
|
|
debugfs_create_file("mode", S_IRUSR | S_IWUSR, |
|
tsdata->debug_dir, tsdata, &debugfs_mode_fops); |
|
debugfs_create_file("raw_data", S_IRUSR, |
|
tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); |
|
} |
|
|
|
static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
debugfs_remove_recursive(tsdata->debug_dir); |
|
kfree(tsdata->raw_buffer); |
|
} |
|
|
|
#else |
|
|
|
static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, |
|
const char *debugfs_name) |
|
{ |
|
} |
|
|
|
static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
} |
|
|
|
#endif /* CONFIG_DEBUGFS */ |
|
|
|
static int edt_ft5x06_ts_identify(struct i2c_client *client, |
|
struct edt_ft5x06_ts_data *tsdata, |
|
char *fw_version) |
|
{ |
|
u8 rdbuf[EDT_NAME_LEN]; |
|
char *p; |
|
int error; |
|
char *model_name = tsdata->name; |
|
|
|
/* see what we find if we assume it is a M06 * |
|
* if we get less than EDT_NAME_LEN, we don't want |
|
* to have garbage in there |
|
*/ |
|
memset(rdbuf, 0, sizeof(rdbuf)); |
|
error = edt_ft5x06_ts_readwrite(client, 1, "\xBB", |
|
EDT_NAME_LEN - 1, rdbuf); |
|
if (error) |
|
return error; |
|
|
|
/* Probe content for something consistent. |
|
* M06 starts with a response byte, M12 gives the data directly. |
|
* M09/Generic does not provide model number information. |
|
*/ |
|
if (!strncasecmp(rdbuf + 1, "EP0", 3)) { |
|
tsdata->version = EDT_M06; |
|
|
|
/* remove last '$' end marker */ |
|
rdbuf[EDT_NAME_LEN - 1] = '\0'; |
|
if (rdbuf[EDT_NAME_LEN - 2] == '$') |
|
rdbuf[EDT_NAME_LEN - 2] = '\0'; |
|
|
|
/* look for Model/Version separator */ |
|
p = strchr(rdbuf, '*'); |
|
if (p) |
|
*p++ = '\0'; |
|
strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); |
|
strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); |
|
} else if (!strncasecmp(rdbuf, "EP0", 3)) { |
|
tsdata->version = EDT_M12; |
|
|
|
/* remove last '$' end marker */ |
|
rdbuf[EDT_NAME_LEN - 2] = '\0'; |
|
if (rdbuf[EDT_NAME_LEN - 3] == '$') |
|
rdbuf[EDT_NAME_LEN - 3] = '\0'; |
|
|
|
/* look for Model/Version separator */ |
|
p = strchr(rdbuf, '*'); |
|
if (p) |
|
*p++ = '\0'; |
|
strlcpy(model_name, rdbuf, EDT_NAME_LEN); |
|
strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); |
|
} else { |
|
/* If it is not an EDT M06/M12 touchscreen, then the model |
|
* detection is a bit hairy. The different ft5x06 |
|
* firmares around don't reliably implement the |
|
* identification registers. Well, we'll take a shot. |
|
* |
|
* The main difference between generic focaltec based |
|
* touches and EDT M09 is that we know how to retrieve |
|
* the max coordinates for the latter. |
|
*/ |
|
tsdata->version = GENERIC_FT; |
|
|
|
error = edt_ft5x06_ts_readwrite(client, 1, "\xA6", |
|
2, rdbuf); |
|
if (error) |
|
return error; |
|
|
|
strlcpy(fw_version, rdbuf, 2); |
|
|
|
error = edt_ft5x06_ts_readwrite(client, 1, "\xA8", |
|
1, rdbuf); |
|
if (error) |
|
return error; |
|
|
|
/* This "model identification" is not exact. Unfortunately |
|
* not all firmwares for the ft5x06 put useful values in |
|
* the identification registers. |
|
*/ |
|
switch (rdbuf[0]) { |
|
case 0x11: /* EDT EP0110M09 */ |
|
case 0x35: /* EDT EP0350M09 */ |
|
case 0x43: /* EDT EP0430M09 */ |
|
case 0x50: /* EDT EP0500M09 */ |
|
case 0x57: /* EDT EP0570M09 */ |
|
case 0x70: /* EDT EP0700M09 */ |
|
tsdata->version = EDT_M09; |
|
snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", |
|
rdbuf[0] >> 4, rdbuf[0] & 0x0F); |
|
break; |
|
case 0xa1: /* EDT EP1010ML00 */ |
|
tsdata->version = EDT_M09; |
|
snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", |
|
rdbuf[0] >> 4, rdbuf[0] & 0x0F); |
|
break; |
|
case 0x5a: /* Solomon Goldentek Display */ |
|
snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); |
|
break; |
|
case 0x59: /* Evervision Display with FT5xx6 TS */ |
|
tsdata->version = EV_FT; |
|
error = edt_ft5x06_ts_readwrite(client, 1, "\x53", |
|
1, rdbuf); |
|
if (error) |
|
return error; |
|
strlcpy(fw_version, rdbuf, 1); |
|
snprintf(model_name, EDT_NAME_LEN, |
|
"EVERVISION-FT5726NEi"); |
|
break; |
|
default: |
|
snprintf(model_name, EDT_NAME_LEN, |
|
"generic ft5x06 (%02x)", |
|
rdbuf[0]); |
|
break; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void edt_ft5x06_ts_get_defaults(struct device *dev, |
|
struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct edt_reg_addr *reg_addr = &tsdata->reg_addr; |
|
u32 val; |
|
int error; |
|
|
|
error = device_property_read_u32(dev, "threshold", &val); |
|
if (!error) { |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val); |
|
tsdata->threshold = val; |
|
} |
|
|
|
error = device_property_read_u32(dev, "gain", &val); |
|
if (!error) { |
|
edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val); |
|
tsdata->gain = val; |
|
} |
|
|
|
error = device_property_read_u32(dev, "offset", &val); |
|
if (!error) { |
|
if (reg_addr->reg_offset != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, |
|
reg_addr->reg_offset, val); |
|
tsdata->offset = val; |
|
} |
|
|
|
error = device_property_read_u32(dev, "offset-x", &val); |
|
if (!error) { |
|
if (reg_addr->reg_offset_x != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, |
|
reg_addr->reg_offset_x, val); |
|
tsdata->offset_x = val; |
|
} |
|
|
|
error = device_property_read_u32(dev, "offset-y", &val); |
|
if (!error) { |
|
if (reg_addr->reg_offset_y != NO_REGISTER) |
|
edt_ft5x06_register_write(tsdata, |
|
reg_addr->reg_offset_y, val); |
|
tsdata->offset_y = val; |
|
} |
|
} |
|
|
|
static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct edt_reg_addr *reg_addr = &tsdata->reg_addr; |
|
|
|
tsdata->threshold = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_threshold); |
|
tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain); |
|
if (reg_addr->reg_offset != NO_REGISTER) |
|
tsdata->offset = |
|
edt_ft5x06_register_read(tsdata, reg_addr->reg_offset); |
|
if (reg_addr->reg_offset_x != NO_REGISTER) |
|
tsdata->offset_x = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_offset_x); |
|
if (reg_addr->reg_offset_y != NO_REGISTER) |
|
tsdata->offset_y = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_offset_y); |
|
if (reg_addr->reg_report_rate != NO_REGISTER) |
|
tsdata->report_rate = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_report_rate); |
|
tsdata->num_x = EDT_DEFAULT_NUM_X; |
|
if (reg_addr->reg_num_x != NO_REGISTER) |
|
tsdata->num_x = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_num_x); |
|
tsdata->num_y = EDT_DEFAULT_NUM_Y; |
|
if (reg_addr->reg_num_y != NO_REGISTER) |
|
tsdata->num_y = edt_ft5x06_register_read(tsdata, |
|
reg_addr->reg_num_y); |
|
} |
|
|
|
static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) |
|
{ |
|
struct edt_reg_addr *reg_addr = &tsdata->reg_addr; |
|
|
|
switch (tsdata->version) { |
|
case EDT_M06: |
|
reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; |
|
reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; |
|
reg_addr->reg_gain = WORK_REGISTER_GAIN; |
|
reg_addr->reg_offset = WORK_REGISTER_OFFSET; |
|
reg_addr->reg_offset_x = NO_REGISTER; |
|
reg_addr->reg_offset_y = NO_REGISTER; |
|
reg_addr->reg_num_x = WORK_REGISTER_NUM_X; |
|
reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; |
|
break; |
|
|
|
case EDT_M09: |
|
case EDT_M12: |
|
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; |
|
reg_addr->reg_report_rate = NO_REGISTER; |
|
reg_addr->reg_gain = M09_REGISTER_GAIN; |
|
reg_addr->reg_offset = M09_REGISTER_OFFSET; |
|
reg_addr->reg_offset_x = NO_REGISTER; |
|
reg_addr->reg_offset_y = NO_REGISTER; |
|
reg_addr->reg_num_x = M09_REGISTER_NUM_X; |
|
reg_addr->reg_num_y = M09_REGISTER_NUM_Y; |
|
break; |
|
|
|
case EV_FT: |
|
reg_addr->reg_threshold = EV_REGISTER_THRESHOLD; |
|
reg_addr->reg_report_rate = NO_REGISTER; |
|
reg_addr->reg_gain = EV_REGISTER_GAIN; |
|
reg_addr->reg_offset = NO_REGISTER; |
|
reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X; |
|
reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y; |
|
reg_addr->reg_num_x = NO_REGISTER; |
|
reg_addr->reg_num_y = NO_REGISTER; |
|
break; |
|
|
|
case GENERIC_FT: |
|
/* this is a guesswork */ |
|
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; |
|
reg_addr->reg_report_rate = NO_REGISTER; |
|
reg_addr->reg_gain = M09_REGISTER_GAIN; |
|
reg_addr->reg_offset = M09_REGISTER_OFFSET; |
|
reg_addr->reg_offset_x = NO_REGISTER; |
|
reg_addr->reg_offset_y = NO_REGISTER; |
|
reg_addr->reg_num_x = NO_REGISTER; |
|
reg_addr->reg_num_y = NO_REGISTER; |
|
break; |
|
} |
|
} |
|
|
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static void edt_ft5x06_disable_regulators(void *arg) |
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{ |
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struct edt_ft5x06_ts_data *data = arg; |
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regulator_disable(data->vcc); |
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regulator_disable(data->iovcc); |
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} |
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static int edt_ft5x06_ts_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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const struct edt_i2c_chip_data *chip_data; |
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struct edt_ft5x06_ts_data *tsdata; |
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u8 buf[2] = { 0xfc, 0x00 }; |
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struct input_dev *input; |
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unsigned long irq_flags; |
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int error; |
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char fw_version[EDT_NAME_LEN]; |
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dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); |
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tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); |
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if (!tsdata) { |
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dev_err(&client->dev, "failed to allocate driver data.\n"); |
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return -ENOMEM; |
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} |
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chip_data = device_get_match_data(&client->dev); |
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if (!chip_data) |
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chip_data = (const struct edt_i2c_chip_data *)id->driver_data; |
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if (!chip_data || !chip_data->max_support_points) { |
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dev_err(&client->dev, "invalid or missing chip data\n"); |
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return -EINVAL; |
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} |
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tsdata->max_support_points = chip_data->max_support_points; |
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tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); |
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if (IS_ERR(tsdata->vcc)) { |
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error = PTR_ERR(tsdata->vcc); |
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if (error != -EPROBE_DEFER) |
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dev_err(&client->dev, |
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"failed to request regulator: %d\n", error); |
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return error; |
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} |
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tsdata->iovcc = devm_regulator_get(&client->dev, "iovcc"); |
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if (IS_ERR(tsdata->iovcc)) { |
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error = PTR_ERR(tsdata->iovcc); |
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if (error != -EPROBE_DEFER) |
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dev_err(&client->dev, |
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"failed to request iovcc regulator: %d\n", error); |
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return error; |
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} |
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error = regulator_enable(tsdata->iovcc); |
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if (error < 0) { |
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dev_err(&client->dev, "failed to enable iovcc: %d\n", error); |
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return error; |
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} |
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/* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ |
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usleep_range(10, 100); |
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error = regulator_enable(tsdata->vcc); |
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if (error < 0) { |
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dev_err(&client->dev, "failed to enable vcc: %d\n", error); |
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regulator_disable(tsdata->iovcc); |
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return error; |
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} |
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error = devm_add_action_or_reset(&client->dev, |
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edt_ft5x06_disable_regulators, |
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tsdata); |
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if (error) |
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return error; |
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tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, |
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"reset", GPIOD_OUT_HIGH); |
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if (IS_ERR(tsdata->reset_gpio)) { |
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error = PTR_ERR(tsdata->reset_gpio); |
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dev_err(&client->dev, |
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"Failed to request GPIO reset pin, error %d\n", error); |
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return error; |
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} |
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tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, |
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"wake", GPIOD_OUT_LOW); |
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if (IS_ERR(tsdata->wake_gpio)) { |
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error = PTR_ERR(tsdata->wake_gpio); |
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dev_err(&client->dev, |
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"Failed to request GPIO wake pin, error %d\n", error); |
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return error; |
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} |
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/* |
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* Check which sleep modes we can support. Power-off requieres the |
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* reset-pin to ensure correct power-down/power-up behaviour. Start with |
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* the EDT_PMODE_POWEROFF test since this is the deepest possible sleep |
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* mode. |
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*/ |
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if (tsdata->reset_gpio) |
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tsdata->suspend_mode = EDT_PMODE_POWEROFF; |
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else if (tsdata->wake_gpio) |
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tsdata->suspend_mode = EDT_PMODE_HIBERNATE; |
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else |
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tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED; |
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if (tsdata->wake_gpio) { |
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usleep_range(5000, 6000); |
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gpiod_set_value_cansleep(tsdata->wake_gpio, 1); |
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} |
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if (tsdata->reset_gpio) { |
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usleep_range(5000, 6000); |
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gpiod_set_value_cansleep(tsdata->reset_gpio, 0); |
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msleep(300); |
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} |
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input = devm_input_allocate_device(&client->dev); |
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if (!input) { |
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dev_err(&client->dev, "failed to allocate input device.\n"); |
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return -ENOMEM; |
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} |
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mutex_init(&tsdata->mutex); |
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tsdata->client = client; |
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tsdata->input = input; |
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tsdata->factory_mode = false; |
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error = edt_ft5x06_ts_identify(client, tsdata, fw_version); |
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if (error) { |
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dev_err(&client->dev, "touchscreen probe failed\n"); |
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return error; |
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} |
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/* |
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* Dummy read access. EP0700MLP1 returns bogus data on the first |
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* register read access and ignores writes. |
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*/ |
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edt_ft5x06_ts_readwrite(tsdata->client, 2, buf, 2, buf); |
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edt_ft5x06_ts_set_regs(tsdata); |
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edt_ft5x06_ts_get_defaults(&client->dev, tsdata); |
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edt_ft5x06_ts_get_parameters(tsdata); |
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dev_dbg(&client->dev, |
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"Model \"%s\", Rev. \"%s\", %dx%d sensors\n", |
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tsdata->name, fw_version, tsdata->num_x, tsdata->num_y); |
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input->name = tsdata->name; |
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input->id.bustype = BUS_I2C; |
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input->dev.parent = &client->dev; |
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input_set_abs_params(input, ABS_MT_POSITION_X, |
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0, tsdata->num_x * 64 - 1, 0, 0); |
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input_set_abs_params(input, ABS_MT_POSITION_Y, |
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0, tsdata->num_y * 64 - 1, 0, 0); |
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touchscreen_parse_properties(input, true, &tsdata->prop); |
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error = input_mt_init_slots(input, tsdata->max_support_points, |
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INPUT_MT_DIRECT); |
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if (error) { |
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dev_err(&client->dev, "Unable to init MT slots.\n"); |
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return error; |
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} |
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i2c_set_clientdata(client, tsdata); |
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if (client->irq) { |
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irq_flags = irq_get_trigger_type(client->irq); |
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if (irq_flags == IRQF_TRIGGER_NONE) |
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irq_flags = IRQF_TRIGGER_FALLING; |
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irq_flags |= IRQF_ONESHOT; |
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error = devm_request_threaded_irq(&client->dev, client->irq, |
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NULL, edt_ft5x06_ts_isr, |
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irq_flags, client->name, |
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tsdata); |
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if (error) { |
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dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); |
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return error; |
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} |
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} else { |
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INIT_WORK(&tsdata->work_i2c_poll, |
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edt_ft5x06_ts_work_i2c_poll); |
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timer_setup(&tsdata->timer, edt_ft5x06_ts_irq_poll_timer, 0); |
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tsdata->timer.expires = jiffies + |
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msecs_to_jiffies(POLL_INTERVAL_MS); |
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add_timer(&tsdata->timer); |
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} |
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error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group); |
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if (error) |
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return error; |
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error = input_register_device(input); |
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if (error) |
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return error; |
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edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); |
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dev_dbg(&client->dev, |
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"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", |
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client->irq, |
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tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, |
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tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); |
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return 0; |
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} |
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static int edt_ft5x06_ts_remove(struct i2c_client *client) |
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{ |
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); |
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if (!client->irq) { |
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del_timer(&tsdata->timer); |
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cancel_work_sync(&tsdata->work_i2c_poll); |
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} |
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edt_ft5x06_ts_teardown_debugfs(tsdata); |
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return 0; |
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} |
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static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev) |
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{ |
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struct i2c_client *client = to_i2c_client(dev); |
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); |
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struct gpio_desc *reset_gpio = tsdata->reset_gpio; |
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int ret; |
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if (device_may_wakeup(dev)) |
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return 0; |
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if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) |
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return 0; |
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/* Enter hibernate mode. */ |
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ret = edt_ft5x06_register_write(tsdata, PMOD_REGISTER_OPMODE, |
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PMOD_REGISTER_HIBERNATE); |
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if (ret) |
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dev_warn(dev, "Failed to set hibernate mode\n"); |
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if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE) |
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return 0; |
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/* |
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* Power-off according the datasheet. Cut the power may leaf the irq |
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* line in an undefined state depending on the host pull resistor |
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* settings. Disable the irq to avoid adjusting each host till the |
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* device is back in a full functional state. |
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*/ |
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disable_irq(tsdata->client->irq); |
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gpiod_set_value_cansleep(reset_gpio, 1); |
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usleep_range(1000, 2000); |
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ret = regulator_disable(tsdata->vcc); |
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if (ret) |
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dev_warn(dev, "Failed to disable vcc\n"); |
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ret = regulator_disable(tsdata->iovcc); |
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if (ret) |
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dev_warn(dev, "Failed to disable iovcc\n"); |
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return 0; |
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} |
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static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) |
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{ |
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struct i2c_client *client = to_i2c_client(dev); |
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); |
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int ret = 0; |
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if (device_may_wakeup(dev)) |
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return 0; |
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if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) |
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return 0; |
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if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) { |
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struct gpio_desc *reset_gpio = tsdata->reset_gpio; |
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|
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/* |
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* We can't check if the regulator is a dummy or a real |
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* regulator. So we need to specify the 5ms reset time (T_rst) |
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* here instead of the 100us T_rtp time. We also need to wait |
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* 300ms in case it was a real supply and the power was cutted |
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* of. Toggle the reset pin is also a way to exit the hibernate |
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* mode. |
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*/ |
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gpiod_set_value_cansleep(reset_gpio, 1); |
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usleep_range(5000, 6000); |
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ret = regulator_enable(tsdata->iovcc); |
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if (ret) { |
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dev_err(dev, "Failed to enable iovcc\n"); |
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return ret; |
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} |
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/* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ |
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usleep_range(10, 100); |
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ret = regulator_enable(tsdata->vcc); |
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if (ret) { |
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dev_err(dev, "Failed to enable vcc\n"); |
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regulator_disable(tsdata->iovcc); |
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return ret; |
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} |
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usleep_range(1000, 2000); |
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gpiod_set_value_cansleep(reset_gpio, 0); |
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msleep(300); |
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edt_ft5x06_restore_reg_parameters(tsdata); |
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enable_irq(tsdata->client->irq); |
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if (tsdata->factory_mode) |
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ret = edt_ft5x06_factory_mode(tsdata); |
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} else { |
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struct gpio_desc *wake_gpio = tsdata->wake_gpio; |
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gpiod_set_value_cansleep(wake_gpio, 0); |
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usleep_range(5000, 6000); |
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gpiod_set_value_cansleep(wake_gpio, 1); |
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} |
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return ret; |
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} |
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static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, |
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edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); |
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static const struct edt_i2c_chip_data edt_ft5x06_data = { |
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.max_support_points = 5, |
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}; |
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static const struct edt_i2c_chip_data edt_ft5506_data = { |
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.max_support_points = 10, |
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}; |
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static const struct edt_i2c_chip_data edt_ft6236_data = { |
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.max_support_points = 2, |
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}; |
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static const struct i2c_device_id edt_ft5x06_ts_id[] = { |
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{ .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, |
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{ .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, |
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{ .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data }, |
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/* Note no edt- prefix for compatibility with the ft6236.c driver */ |
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{ .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); |
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static const struct of_device_id edt_ft5x06_of_match[] = { |
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{ .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, |
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{ .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, |
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{ .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, |
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{ .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, |
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{ .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data }, |
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/* Note focaltech vendor prefix for compatibility with ft6236.c */ |
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{ .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); |
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|
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static struct i2c_driver edt_ft5x06_ts_driver = { |
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.driver = { |
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.name = "edt_ft5x06", |
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.of_match_table = edt_ft5x06_of_match, |
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.pm = &edt_ft5x06_ts_pm_ops, |
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.probe_type = PROBE_PREFER_ASYNCHRONOUS, |
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}, |
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.id_table = edt_ft5x06_ts_id, |
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.probe = edt_ft5x06_ts_probe, |
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.remove = edt_ft5x06_ts_remove, |
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}; |
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module_i2c_driver(edt_ft5x06_ts_driver); |
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MODULE_AUTHOR("Simon Budig <[email protected]>"); |
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MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); |
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MODULE_LICENSE("GPL v2");
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