714 lines
16 KiB
C
714 lines
16 KiB
C
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/*
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* Elan I2C/SMBus Touchpad driver - I2C interface
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*
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* Copyright (c) 2013 ELAN Microelectronics Corp.
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*
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* Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
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*
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* Based on cyapa driver:
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* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
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* copyright (c) 2011-2012 Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Trademarks are the property of their respective owners.
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*/
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/unaligned.h>
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#include "elan_i2c.h"
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/* Elan i2c commands */
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#define ETP_I2C_RESET 0x0100
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#define ETP_I2C_WAKE_UP 0x0800
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#define ETP_I2C_SLEEP 0x0801
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#define ETP_I2C_DESC_CMD 0x0001
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#define ETP_I2C_REPORT_DESC_CMD 0x0002
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#define ETP_I2C_STAND_CMD 0x0005
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#define ETP_I2C_PATTERN_CMD 0x0100
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#define ETP_I2C_UNIQUEID_CMD 0x0101
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#define ETP_I2C_FW_VERSION_CMD 0x0102
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#define ETP_I2C_IC_TYPE_CMD 0x0103
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#define ETP_I2C_OSM_VERSION_CMD 0x0103
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#define ETP_I2C_NSM_VERSION_CMD 0x0104
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#define ETP_I2C_XY_TRACENUM_CMD 0x0105
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#define ETP_I2C_MAX_X_AXIS_CMD 0x0106
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#define ETP_I2C_MAX_Y_AXIS_CMD 0x0107
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#define ETP_I2C_RESOLUTION_CMD 0x0108
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#define ETP_I2C_PRESSURE_CMD 0x010A
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#define ETP_I2C_IAP_VERSION_CMD 0x0110
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#define ETP_I2C_SET_CMD 0x0300
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#define ETP_I2C_POWER_CMD 0x0307
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#define ETP_I2C_FW_CHECKSUM_CMD 0x030F
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#define ETP_I2C_IAP_CTRL_CMD 0x0310
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#define ETP_I2C_IAP_CMD 0x0311
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#define ETP_I2C_IAP_RESET_CMD 0x0314
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#define ETP_I2C_IAP_CHECKSUM_CMD 0x0315
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#define ETP_I2C_CALIBRATE_CMD 0x0316
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#define ETP_I2C_MAX_BASELINE_CMD 0x0317
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#define ETP_I2C_MIN_BASELINE_CMD 0x0318
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#define ETP_I2C_REPORT_LEN 34
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#define ETP_I2C_DESC_LENGTH 30
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#define ETP_I2C_REPORT_DESC_LENGTH 158
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#define ETP_I2C_INF_LENGTH 2
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#define ETP_I2C_IAP_PASSWORD 0x1EA5
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#define ETP_I2C_IAP_RESET 0xF0F0
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#define ETP_I2C_MAIN_MODE_ON (1 << 9)
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#define ETP_I2C_IAP_REG_L 0x01
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#define ETP_I2C_IAP_REG_H 0x06
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static int elan_i2c_read_block(struct i2c_client *client,
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u16 reg, u8 *val, u16 len)
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{
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__le16 buf[] = {
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cpu_to_le16(reg),
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};
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = client->flags & I2C_M_TEN,
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.len = sizeof(buf),
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.buf = (u8 *)buf,
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},
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{
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.addr = client->addr,
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.flags = (client->flags & I2C_M_TEN) | I2C_M_RD,
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.len = len,
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.buf = val,
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}
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};
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int ret;
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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return ret == ARRAY_SIZE(msgs) ? 0 : (ret < 0 ? ret : -EIO);
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}
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static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val)
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{
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int retval;
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retval = elan_i2c_read_block(client, reg, val, ETP_I2C_INF_LENGTH);
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if (retval < 0) {
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dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg);
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return retval;
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}
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return 0;
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}
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static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd)
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{
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__le16 buf[] = {
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cpu_to_le16(reg),
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cpu_to_le16(cmd),
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};
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struct i2c_msg msg = {
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.addr = client->addr,
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.flags = client->flags & I2C_M_TEN,
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.len = sizeof(buf),
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.buf = (u8 *)buf,
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};
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int ret;
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ret = i2c_transfer(client->adapter, &msg, 1);
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if (ret != 1) {
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if (ret >= 0)
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ret = -EIO;
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dev_err(&client->dev, "writing cmd (0x%04x) failed: %d\n",
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reg, ret);
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return ret;
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}
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return 0;
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}
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static int elan_i2c_initialize(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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int error;
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u8 val[256];
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error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
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if (error) {
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dev_err(dev, "device reset failed: %d\n", error);
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return error;
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}
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/* Wait for the device to reset */
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msleep(100);
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/* get reset acknowledgement 0000 */
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error = i2c_master_recv(client, val, ETP_I2C_INF_LENGTH);
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if (error < 0) {
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dev_err(dev, "failed to read reset response: %d\n", error);
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return error;
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}
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error = elan_i2c_read_block(client, ETP_I2C_DESC_CMD,
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val, ETP_I2C_DESC_LENGTH);
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if (error) {
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dev_err(dev, "cannot get device descriptor: %d\n", error);
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return error;
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}
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error = elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD,
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val, ETP_I2C_REPORT_DESC_LENGTH);
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if (error) {
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dev_err(dev, "fetching report descriptor failed.: %d\n", error);
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return error;
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}
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return 0;
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}
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static int elan_i2c_sleep_control(struct i2c_client *client, bool sleep)
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{
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return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD,
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sleep ? ETP_I2C_SLEEP : ETP_I2C_WAKE_UP);
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}
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static int elan_i2c_power_control(struct i2c_client *client, bool enable)
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{
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u8 val[2];
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u16 reg;
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int error;
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error = elan_i2c_read_cmd(client, ETP_I2C_POWER_CMD, val);
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if (error) {
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dev_err(&client->dev,
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"failed to read current power state: %d\n",
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error);
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return error;
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}
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reg = le16_to_cpup((__le16 *)val);
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if (enable)
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reg &= ~ETP_DISABLE_POWER;
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else
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reg |= ETP_DISABLE_POWER;
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error = elan_i2c_write_cmd(client, ETP_I2C_POWER_CMD, reg);
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if (error) {
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dev_err(&client->dev,
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"failed to write current power state: %d\n",
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error);
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return error;
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}
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return 0;
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}
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static int elan_i2c_set_mode(struct i2c_client *client, u8 mode)
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{
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return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, mode);
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}
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static int elan_i2c_calibrate(struct i2c_client *client)
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{
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return elan_i2c_write_cmd(client, ETP_I2C_CALIBRATE_CMD, 1);
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}
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static int elan_i2c_calibrate_result(struct i2c_client *client, u8 *val)
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{
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return elan_i2c_read_block(client, ETP_I2C_CALIBRATE_CMD, val, 1);
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}
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static int elan_i2c_get_baseline_data(struct i2c_client *client,
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bool max_baseline, u8 *value)
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{
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int error;
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u8 val[3];
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error = elan_i2c_read_cmd(client,
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max_baseline ? ETP_I2C_MAX_BASELINE_CMD :
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ETP_I2C_MIN_BASELINE_CMD,
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val);
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if (error)
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return error;
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*value = le16_to_cpup((__le16 *)val);
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return 0;
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}
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static int elan_i2c_get_pattern(struct i2c_client *client, u8 *pattern)
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{
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int error;
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u8 val[3];
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error = elan_i2c_read_cmd(client, ETP_I2C_PATTERN_CMD, val);
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if (error) {
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dev_err(&client->dev, "failed to get pattern: %d\n", error);
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return error;
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}
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*pattern = val[1];
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return 0;
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}
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static int elan_i2c_get_version(struct i2c_client *client,
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bool iap, u8 *version)
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{
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int error;
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u8 pattern_ver;
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u8 val[3];
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error = elan_i2c_get_pattern(client, &pattern_ver);
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if (error) {
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dev_err(&client->dev, "failed to get pattern version\n");
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return error;
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}
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error = elan_i2c_read_cmd(client,
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iap ? ETP_I2C_IAP_VERSION_CMD :
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ETP_I2C_FW_VERSION_CMD,
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val);
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if (error) {
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dev_err(&client->dev, "failed to get %s version: %d\n",
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iap ? "IAP" : "FW", error);
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return error;
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}
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if (pattern_ver == 0x01)
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*version = iap ? val[1] : val[0];
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else
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*version = val[0];
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return 0;
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}
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static int elan_i2c_get_sm_version(struct i2c_client *client,
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u16 *ic_type, u8 *version,
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u8 *clickpad)
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{
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int error;
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u8 pattern_ver;
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u8 val[3];
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error = elan_i2c_get_pattern(client, &pattern_ver);
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if (error) {
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dev_err(&client->dev, "failed to get pattern version\n");
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return error;
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}
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if (pattern_ver == 0x01) {
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error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
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if (error) {
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dev_err(&client->dev, "failed to get ic type: %d\n",
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error);
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return error;
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}
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*ic_type = be16_to_cpup((__be16 *)val);
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error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
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val);
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if (error) {
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dev_err(&client->dev, "failed to get SM version: %d\n",
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error);
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return error;
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}
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*version = val[1];
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*clickpad = val[0] & 0x10;
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} else {
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error = elan_i2c_read_cmd(client, ETP_I2C_OSM_VERSION_CMD, val);
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if (error) {
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dev_err(&client->dev, "failed to get SM version: %d\n",
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error);
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return error;
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}
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*version = val[0];
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*ic_type = val[1];
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error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
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val);
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if (error) {
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dev_err(&client->dev, "failed to get SM version: %d\n",
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error);
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return error;
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}
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*clickpad = val[0] & 0x10;
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}
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return 0;
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}
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static int elan_i2c_get_product_id(struct i2c_client *client, u16 *id)
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{
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int error;
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u8 val[3];
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error = elan_i2c_read_cmd(client, ETP_I2C_UNIQUEID_CMD, val);
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if (error) {
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dev_err(&client->dev, "failed to get product ID: %d\n", error);
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return error;
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}
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*id = le16_to_cpup((__le16 *)val);
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return 0;
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}
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static int elan_i2c_get_checksum(struct i2c_client *client,
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bool iap, u16 *csum)
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||
|
|
{
|
||
|
|
int error;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client,
|
||
|
|
iap ? ETP_I2C_IAP_CHECKSUM_CMD :
|
||
|
|
ETP_I2C_FW_CHECKSUM_CMD,
|
||
|
|
val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get %s checksum: %d\n",
|
||
|
|
iap ? "IAP" : "FW", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
*csum = le16_to_cpup((__le16 *)val);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_get_max(struct i2c_client *client,
|
||
|
|
unsigned int *max_x, unsigned int *max_y)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_MAX_X_AXIS_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get X dimension: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
*max_x = le16_to_cpup((__le16 *)val) & 0x0fff;
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get Y dimension: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
*max_y = le16_to_cpup((__le16 *)val) & 0x0fff;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_get_resolution(struct i2c_client *client,
|
||
|
|
u8 *hw_res_x, u8 *hw_res_y)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_RESOLUTION_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get resolution: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
*hw_res_x = val[0];
|
||
|
|
*hw_res_y = val[1];
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_get_num_traces(struct i2c_client *client,
|
||
|
|
unsigned int *x_traces,
|
||
|
|
unsigned int *y_traces)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_XY_TRACENUM_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get trace info: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
*x_traces = val[0];
|
||
|
|
*y_traces = val[1];
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_get_pressure_adjustment(struct i2c_client *client,
|
||
|
|
int *adjustment)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_PRESSURE_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "failed to get pressure format: %d\n",
|
||
|
|
error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((val[0] >> 4) & 0x1)
|
||
|
|
*adjustment = 0;
|
||
|
|
else
|
||
|
|
*adjustment = ETP_PRESSURE_OFFSET;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_iap_get_mode(struct i2c_client *client, enum tp_mode *mode)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
u16 constant;
|
||
|
|
u8 val[3];
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev,
|
||
|
|
"failed to read iap control register: %d\n",
|
||
|
|
error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
constant = le16_to_cpup((__le16 *)val);
|
||
|
|
dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);
|
||
|
|
|
||
|
|
*mode = (constant & ETP_I2C_MAIN_MODE_ON) ? MAIN_MODE : IAP_MODE;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_iap_reset(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
|
||
|
|
error = elan_i2c_write_cmd(client, ETP_I2C_IAP_RESET_CMD,
|
||
|
|
ETP_I2C_IAP_RESET);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "cannot reset IC: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_set_flash_key(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
|
||
|
|
error = elan_i2c_write_cmd(client, ETP_I2C_IAP_CMD,
|
||
|
|
ETP_I2C_IAP_PASSWORD);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&client->dev, "cannot set flash key: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_prepare_fw_update(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct device *dev = &client->dev;
|
||
|
|
int error;
|
||
|
|
enum tp_mode mode;
|
||
|
|
u8 val[3];
|
||
|
|
u16 password;
|
||
|
|
|
||
|
|
/* Get FW in which mode (IAP_MODE/MAIN_MODE) */
|
||
|
|
error = elan_i2c_iap_get_mode(client, &mode);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
if (mode == IAP_MODE) {
|
||
|
|
/* Reset IC */
|
||
|
|
error = elan_i2c_iap_reset(client);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
msleep(30);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set flash key*/
|
||
|
|
error = elan_i2c_set_flash_key(client);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
/* Wait for F/W IAP initialization */
|
||
|
|
msleep(mode == MAIN_MODE ? 100 : 30);
|
||
|
|
|
||
|
|
/* Check if we are in IAP mode or not */
|
||
|
|
error = elan_i2c_iap_get_mode(client, &mode);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
if (mode == MAIN_MODE) {
|
||
|
|
dev_err(dev, "wrong mode: %d\n", mode);
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set flash key again */
|
||
|
|
error = elan_i2c_set_flash_key(client);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
/* Wait for F/W IAP initialization */
|
||
|
|
msleep(30);
|
||
|
|
|
||
|
|
/* read back to check we actually enabled successfully. */
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(dev, "cannot read iap password: %d\n",
|
||
|
|
error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
password = le16_to_cpup((__le16 *)val);
|
||
|
|
if (password != ETP_I2C_IAP_PASSWORD) {
|
||
|
|
dev_err(dev, "wrong iap password: 0x%X\n", password);
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_write_fw_block(struct i2c_client *client,
|
||
|
|
const u8 *page, u16 checksum, int idx)
|
||
|
|
{
|
||
|
|
struct device *dev = &client->dev;
|
||
|
|
u8 page_store[ETP_FW_PAGE_SIZE + 4];
|
||
|
|
u8 val[3];
|
||
|
|
u16 result;
|
||
|
|
int ret, error;
|
||
|
|
|
||
|
|
page_store[0] = ETP_I2C_IAP_REG_L;
|
||
|
|
page_store[1] = ETP_I2C_IAP_REG_H;
|
||
|
|
memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE);
|
||
|
|
/* recode checksum at last two bytes */
|
||
|
|
put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]);
|
||
|
|
|
||
|
|
ret = i2c_master_send(client, page_store, sizeof(page_store));
|
||
|
|
if (ret != sizeof(page_store)) {
|
||
|
|
error = ret < 0 ? ret : -EIO;
|
||
|
|
dev_err(dev, "Failed to write page %d: %d\n", idx, error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Wait for F/W to update one page ROM data. */
|
||
|
|
msleep(35);
|
||
|
|
|
||
|
|
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
|
||
|
|
if (error) {
|
||
|
|
dev_err(dev, "Failed to read IAP write result: %d\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
result = le16_to_cpup((__le16 *)val);
|
||
|
|
if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
|
||
|
|
dev_err(dev, "IAP reports failed write: %04hx\n",
|
||
|
|
result);
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_finish_fw_update(struct i2c_client *client,
|
||
|
|
struct completion *completion)
|
||
|
|
{
|
||
|
|
struct device *dev = &client->dev;
|
||
|
|
int error;
|
||
|
|
int len;
|
||
|
|
u8 buffer[ETP_I2C_REPORT_LEN];
|
||
|
|
|
||
|
|
len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_LEN);
|
||
|
|
if (len != ETP_I2C_REPORT_LEN) {
|
||
|
|
error = len < 0 ? len : -EIO;
|
||
|
|
dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
|
||
|
|
error, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
reinit_completion(completion);
|
||
|
|
enable_irq(client->irq);
|
||
|
|
|
||
|
|
error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
|
||
|
|
if (error) {
|
||
|
|
dev_err(dev, "device reset failed: %d\n", error);
|
||
|
|
} else if (!wait_for_completion_timeout(completion,
|
||
|
|
msecs_to_jiffies(300))) {
|
||
|
|
dev_err(dev, "timeout waiting for device reset\n");
|
||
|
|
error = -ETIMEDOUT;
|
||
|
|
}
|
||
|
|
|
||
|
|
disable_irq(client->irq);
|
||
|
|
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
len = i2c_master_recv(client, buffer, ETP_I2C_INF_LENGTH);
|
||
|
|
if (len != ETP_I2C_INF_LENGTH) {
|
||
|
|
error = len < 0 ? len : -EIO;
|
||
|
|
dev_err(dev, "failed to read INT signal: %d (%d)\n",
|
||
|
|
error, len);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int elan_i2c_get_report(struct i2c_client *client, u8 *report)
|
||
|
|
{
|
||
|
|
int len;
|
||
|
|
|
||
|
|
len = i2c_master_recv(client, report, ETP_I2C_REPORT_LEN);
|
||
|
|
if (len < 0) {
|
||
|
|
dev_err(&client->dev, "failed to read report data: %d\n", len);
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (len != ETP_I2C_REPORT_LEN) {
|
||
|
|
dev_err(&client->dev,
|
||
|
|
"wrong report length (%d vs %d expected)\n",
|
||
|
|
len, ETP_I2C_REPORT_LEN);
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct elan_transport_ops elan_i2c_ops = {
|
||
|
|
.initialize = elan_i2c_initialize,
|
||
|
|
.sleep_control = elan_i2c_sleep_control,
|
||
|
|
.power_control = elan_i2c_power_control,
|
||
|
|
.set_mode = elan_i2c_set_mode,
|
||
|
|
|
||
|
|
.calibrate = elan_i2c_calibrate,
|
||
|
|
.calibrate_result = elan_i2c_calibrate_result,
|
||
|
|
|
||
|
|
.get_baseline_data = elan_i2c_get_baseline_data,
|
||
|
|
|
||
|
|
.get_version = elan_i2c_get_version,
|
||
|
|
.get_sm_version = elan_i2c_get_sm_version,
|
||
|
|
.get_product_id = elan_i2c_get_product_id,
|
||
|
|
.get_checksum = elan_i2c_get_checksum,
|
||
|
|
.get_pressure_adjustment = elan_i2c_get_pressure_adjustment,
|
||
|
|
|
||
|
|
.get_max = elan_i2c_get_max,
|
||
|
|
.get_resolution = elan_i2c_get_resolution,
|
||
|
|
.get_num_traces = elan_i2c_get_num_traces,
|
||
|
|
|
||
|
|
.iap_get_mode = elan_i2c_iap_get_mode,
|
||
|
|
.iap_reset = elan_i2c_iap_reset,
|
||
|
|
|
||
|
|
.prepare_fw_update = elan_i2c_prepare_fw_update,
|
||
|
|
.write_fw_block = elan_i2c_write_fw_block,
|
||
|
|
.finish_fw_update = elan_i2c_finish_fw_update,
|
||
|
|
|
||
|
|
.get_pattern = elan_i2c_get_pattern,
|
||
|
|
|
||
|
|
.get_report = elan_i2c_get_report,
|
||
|
|
};
|