16696777cSDuson Lin /* 26696777cSDuson Lin * Elan I2C/SMBus Touchpad driver 36696777cSDuson Lin * 46696777cSDuson Lin * Copyright (c) 2013 ELAN Microelectronics Corp. 56696777cSDuson Lin * 66696777cSDuson Lin * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw> 758f1eae4SDuson Lin * Version: 1.6.0 86696777cSDuson Lin * 96696777cSDuson Lin * Based on cyapa driver: 106696777cSDuson Lin * copyright (c) 2011-2012 Cypress Semiconductor, Inc. 116696777cSDuson Lin * copyright (c) 2011-2012 Google, Inc. 126696777cSDuson Lin * 136696777cSDuson Lin * This program is free software; you can redistribute it and/or modify it 146696777cSDuson Lin * under the terms of the GNU General Public License version 2 as published 156696777cSDuson Lin * by the Free Software Foundation. 166696777cSDuson Lin * 176696777cSDuson Lin * Trademarks are the property of their respective owners. 186696777cSDuson Lin */ 196696777cSDuson Lin 206696777cSDuson Lin #include <linux/acpi.h> 216696777cSDuson Lin #include <linux/delay.h> 226696777cSDuson Lin #include <linux/device.h> 236696777cSDuson Lin #include <linux/firmware.h> 246696777cSDuson Lin #include <linux/i2c.h> 256696777cSDuson Lin #include <linux/init.h> 266696777cSDuson Lin #include <linux/input/mt.h> 276696777cSDuson Lin #include <linux/interrupt.h> 286696777cSDuson Lin #include <linux/module.h> 296696777cSDuson Lin #include <linux/slab.h> 306696777cSDuson Lin #include <linux/kernel.h> 316696777cSDuson Lin #include <linux/sched.h> 326696777cSDuson Lin #include <linux/input.h> 336696777cSDuson Lin #include <linux/uaccess.h> 346696777cSDuson Lin #include <linux/jiffies.h> 356696777cSDuson Lin #include <linux/completion.h> 366696777cSDuson Lin #include <linux/of.h> 376696777cSDuson Lin #include <linux/regulator/consumer.h> 386696777cSDuson Lin #include <asm/unaligned.h> 396696777cSDuson Lin 406696777cSDuson Lin #include "elan_i2c.h" 416696777cSDuson Lin 426696777cSDuson Lin #define DRIVER_NAME "elan_i2c" 4358f1eae4SDuson Lin #define ELAN_DRIVER_VERSION "1.6.0" 446696777cSDuson Lin #define ETP_MAX_PRESSURE 255 456696777cSDuson Lin #define ETP_FWIDTH_REDUCE 90 466696777cSDuson Lin #define ETP_FINGER_WIDTH 15 476696777cSDuson Lin #define ETP_RETRY_COUNT 3 486696777cSDuson Lin 496696777cSDuson Lin #define ETP_MAX_FINGERS 5 506696777cSDuson Lin #define ETP_FINGER_DATA_LEN 5 516696777cSDuson Lin #define ETP_REPORT_ID 0x5D 526696777cSDuson Lin #define ETP_REPORT_ID_OFFSET 2 536696777cSDuson Lin #define ETP_TOUCH_INFO_OFFSET 3 546696777cSDuson Lin #define ETP_FINGER_DATA_OFFSET 4 55090ad325SDuson Lin #define ETP_HOVER_INFO_OFFSET 30 566696777cSDuson Lin #define ETP_MAX_REPORT_LEN 34 576696777cSDuson Lin 586696777cSDuson Lin /* The main device structure */ 596696777cSDuson Lin struct elan_tp_data { 606696777cSDuson Lin struct i2c_client *client; 616696777cSDuson Lin struct input_dev *input; 626696777cSDuson Lin struct regulator *vcc; 636696777cSDuson Lin 646696777cSDuson Lin const struct elan_transport_ops *ops; 656696777cSDuson Lin 666696777cSDuson Lin /* for fw update */ 676696777cSDuson Lin struct completion fw_completion; 686696777cSDuson Lin bool in_fw_update; 696696777cSDuson Lin 706696777cSDuson Lin struct mutex sysfs_mutex; 716696777cSDuson Lin 726696777cSDuson Lin unsigned int max_x; 736696777cSDuson Lin unsigned int max_y; 746696777cSDuson Lin unsigned int width_x; 756696777cSDuson Lin unsigned int width_y; 766696777cSDuson Lin unsigned int x_res; 776696777cSDuson Lin unsigned int y_res; 786696777cSDuson Lin 796696777cSDuson Lin u8 product_id; 806696777cSDuson Lin u8 fw_version; 816696777cSDuson Lin u8 sm_version; 826696777cSDuson Lin u8 iap_version; 836696777cSDuson Lin u16 fw_checksum; 84b9bced0eSduson int pressure_adjustment; 856696777cSDuson Lin u8 mode; 8612018ac3SDuson Lin u8 ic_type; 87742f452bSBenson Leung u16 fw_validpage_count; 8812018ac3SDuson Lin u16 fw_signature_address; 896696777cSDuson Lin 906696777cSDuson Lin bool irq_wake; 916696777cSDuson Lin 926696777cSDuson Lin u8 min_baseline; 936696777cSDuson Lin u8 max_baseline; 946696777cSDuson Lin bool baseline_ready; 956696777cSDuson Lin }; 966696777cSDuson Lin 9758f1eae4SDuson Lin static int elan_get_fwinfo(u8 iap_version, u16 *validpage_count, 9812018ac3SDuson Lin u16 *signature_address) 9912018ac3SDuson Lin { 10058f1eae4SDuson Lin switch (iap_version) { 101534fcb3bSMichele Curti case 0x08: 102742f452bSBenson Leung *validpage_count = 512; 103534fcb3bSMichele Curti break; 10412018ac3SDuson Lin case 0x09: 105742f452bSBenson Leung *validpage_count = 768; 10612018ac3SDuson Lin break; 10712018ac3SDuson Lin case 0x0D: 108742f452bSBenson Leung *validpage_count = 896; 10912018ac3SDuson Lin break; 11012018ac3SDuson Lin default: 11112018ac3SDuson Lin /* unknown ic type clear value */ 112742f452bSBenson Leung *validpage_count = 0; 11312018ac3SDuson Lin *signature_address = 0; 11412018ac3SDuson Lin return -ENXIO; 11512018ac3SDuson Lin } 11612018ac3SDuson Lin 11712018ac3SDuson Lin *signature_address = 118742f452bSBenson Leung (*validpage_count * ETP_FW_PAGE_SIZE) - ETP_FW_SIGNATURE_SIZE; 11912018ac3SDuson Lin 12012018ac3SDuson Lin return 0; 12112018ac3SDuson Lin } 12212018ac3SDuson Lin 1236696777cSDuson Lin static int elan_enable_power(struct elan_tp_data *data) 1246696777cSDuson Lin { 1256696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1266696777cSDuson Lin int error; 1276696777cSDuson Lin 1286696777cSDuson Lin error = regulator_enable(data->vcc); 1296696777cSDuson Lin if (error) { 1306696777cSDuson Lin dev_err(&data->client->dev, 131b3beed7fSDuson Lin "failed to enable regulator: %d\n", error); 1326696777cSDuson Lin return error; 1336696777cSDuson Lin } 1346696777cSDuson Lin 1356696777cSDuson Lin do { 1366696777cSDuson Lin error = data->ops->power_control(data->client, true); 1376696777cSDuson Lin if (error >= 0) 1386696777cSDuson Lin return 0; 1396696777cSDuson Lin 1406696777cSDuson Lin msleep(30); 1416696777cSDuson Lin } while (--repeat > 0); 1426696777cSDuson Lin 143b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to enable power: %d\n", error); 1446696777cSDuson Lin return error; 1456696777cSDuson Lin } 1466696777cSDuson Lin 1476696777cSDuson Lin static int elan_disable_power(struct elan_tp_data *data) 1486696777cSDuson Lin { 1496696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1506696777cSDuson Lin int error; 1516696777cSDuson Lin 1526696777cSDuson Lin do { 1536696777cSDuson Lin error = data->ops->power_control(data->client, false); 1546696777cSDuson Lin if (!error) { 1556696777cSDuson Lin error = regulator_disable(data->vcc); 1566696777cSDuson Lin if (error) { 1576696777cSDuson Lin dev_err(&data->client->dev, 158b3beed7fSDuson Lin "failed to disable regulator: %d\n", 1596696777cSDuson Lin error); 1606696777cSDuson Lin /* Attempt to power the chip back up */ 1616696777cSDuson Lin data->ops->power_control(data->client, true); 1626696777cSDuson Lin break; 1636696777cSDuson Lin } 1646696777cSDuson Lin 1656696777cSDuson Lin return 0; 1666696777cSDuson Lin } 1676696777cSDuson Lin 1686696777cSDuson Lin msleep(30); 1696696777cSDuson Lin } while (--repeat > 0); 1706696777cSDuson Lin 171b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to disable power: %d\n", error); 1726696777cSDuson Lin return error; 1736696777cSDuson Lin } 1746696777cSDuson Lin 1756696777cSDuson Lin static int elan_sleep(struct elan_tp_data *data) 1766696777cSDuson Lin { 1776696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1786696777cSDuson Lin int error; 1796696777cSDuson Lin 1806696777cSDuson Lin do { 1816696777cSDuson Lin error = data->ops->sleep_control(data->client, true); 1826696777cSDuson Lin if (!error) 1836696777cSDuson Lin return 0; 1846696777cSDuson Lin 1856696777cSDuson Lin msleep(30); 1866696777cSDuson Lin } while (--repeat > 0); 1876696777cSDuson Lin 1886696777cSDuson Lin return error; 1896696777cSDuson Lin } 1906696777cSDuson Lin 1916696777cSDuson Lin static int __elan_initialize(struct elan_tp_data *data) 1926696777cSDuson Lin { 1936696777cSDuson Lin struct i2c_client *client = data->client; 1946696777cSDuson Lin int error; 1956696777cSDuson Lin 1966696777cSDuson Lin error = data->ops->initialize(client); 1976696777cSDuson Lin if (error) { 1986696777cSDuson Lin dev_err(&client->dev, "device initialize failed: %d\n", error); 1996696777cSDuson Lin return error; 2006696777cSDuson Lin } 2016696777cSDuson Lin 2026696777cSDuson Lin data->mode |= ETP_ENABLE_ABS; 2036696777cSDuson Lin error = data->ops->set_mode(client, data->mode); 2046696777cSDuson Lin if (error) { 2056696777cSDuson Lin dev_err(&client->dev, 2066696777cSDuson Lin "failed to switch to absolute mode: %d\n", error); 2076696777cSDuson Lin return error; 2086696777cSDuson Lin } 2096696777cSDuson Lin 2106696777cSDuson Lin error = data->ops->sleep_control(client, false); 2116696777cSDuson Lin if (error) { 2126696777cSDuson Lin dev_err(&client->dev, 2136696777cSDuson Lin "failed to wake device up: %d\n", error); 2146696777cSDuson Lin return error; 2156696777cSDuson Lin } 2166696777cSDuson Lin 2176696777cSDuson Lin return 0; 2186696777cSDuson Lin } 2196696777cSDuson Lin 2206696777cSDuson Lin static int elan_initialize(struct elan_tp_data *data) 2216696777cSDuson Lin { 2226696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 2236696777cSDuson Lin int error; 2246696777cSDuson Lin 2256696777cSDuson Lin do { 2266696777cSDuson Lin error = __elan_initialize(data); 2276696777cSDuson Lin if (!error) 2286696777cSDuson Lin return 0; 2296696777cSDuson Lin 2306696777cSDuson Lin msleep(30); 2316696777cSDuson Lin } while (--repeat > 0); 2326696777cSDuson Lin 2336696777cSDuson Lin return error; 2346696777cSDuson Lin } 2356696777cSDuson Lin 2366696777cSDuson Lin static int elan_query_device_info(struct elan_tp_data *data) 2376696777cSDuson Lin { 2386696777cSDuson Lin int error; 2396696777cSDuson Lin 2406696777cSDuson Lin error = data->ops->get_product_id(data->client, &data->product_id); 2416696777cSDuson Lin if (error) 2426696777cSDuson Lin return error; 2436696777cSDuson Lin 2446696777cSDuson Lin error = data->ops->get_version(data->client, false, &data->fw_version); 2456696777cSDuson Lin if (error) 2466696777cSDuson Lin return error; 2476696777cSDuson Lin 2486696777cSDuson Lin error = data->ops->get_checksum(data->client, false, 2496696777cSDuson Lin &data->fw_checksum); 2506696777cSDuson Lin if (error) 2516696777cSDuson Lin return error; 2526696777cSDuson Lin 25312018ac3SDuson Lin error = data->ops->get_sm_version(data->client, &data->ic_type, 25412018ac3SDuson Lin &data->sm_version); 2556696777cSDuson Lin if (error) 2566696777cSDuson Lin return error; 2576696777cSDuson Lin 2586696777cSDuson Lin error = data->ops->get_version(data->client, true, &data->iap_version); 2596696777cSDuson Lin if (error) 2606696777cSDuson Lin return error; 2616696777cSDuson Lin 262b9bced0eSduson error = data->ops->get_pressure_adjustment(data->client, 263b9bced0eSduson &data->pressure_adjustment); 264b9bced0eSduson if (error) 265b9bced0eSduson return error; 266b9bced0eSduson 26758f1eae4SDuson Lin error = elan_get_fwinfo(data->iap_version, &data->fw_validpage_count, 26812018ac3SDuson Lin &data->fw_signature_address); 26912018ac3SDuson Lin if (error) { 27012018ac3SDuson Lin dev_err(&data->client->dev, 27158f1eae4SDuson Lin "unknown iap version %d\n", data->iap_version); 27212018ac3SDuson Lin return error; 27312018ac3SDuson Lin } 27412018ac3SDuson Lin 2756696777cSDuson Lin return 0; 2766696777cSDuson Lin } 2776696777cSDuson Lin 2786696777cSDuson Lin static unsigned int elan_convert_resolution(u8 val) 2796696777cSDuson Lin { 2806696777cSDuson Lin /* 2816696777cSDuson Lin * (value from firmware) * 10 + 790 = dpi 2826696777cSDuson Lin * 2836696777cSDuson Lin * We also have to convert dpi to dots/mm (*10/254 to avoid floating 2846696777cSDuson Lin * point). 2856696777cSDuson Lin */ 2866696777cSDuson Lin 2876696777cSDuson Lin return ((int)(char)val * 10 + 790) * 10 / 254; 2886696777cSDuson Lin } 2896696777cSDuson Lin 2906696777cSDuson Lin static int elan_query_device_parameters(struct elan_tp_data *data) 2916696777cSDuson Lin { 2926696777cSDuson Lin unsigned int x_traces, y_traces; 2936696777cSDuson Lin u8 hw_x_res, hw_y_res; 2946696777cSDuson Lin int error; 2956696777cSDuson Lin 2966696777cSDuson Lin error = data->ops->get_max(data->client, &data->max_x, &data->max_y); 2976696777cSDuson Lin if (error) 2986696777cSDuson Lin return error; 2996696777cSDuson Lin 3006696777cSDuson Lin error = data->ops->get_num_traces(data->client, &x_traces, &y_traces); 3016696777cSDuson Lin if (error) 3026696777cSDuson Lin return error; 3036696777cSDuson Lin 3046696777cSDuson Lin data->width_x = data->max_x / x_traces; 3056696777cSDuson Lin data->width_y = data->max_y / y_traces; 3066696777cSDuson Lin 3076696777cSDuson Lin error = data->ops->get_resolution(data->client, &hw_x_res, &hw_y_res); 3086696777cSDuson Lin if (error) 3096696777cSDuson Lin return error; 3106696777cSDuson Lin 3116696777cSDuson Lin data->x_res = elan_convert_resolution(hw_x_res); 3126696777cSDuson Lin data->y_res = elan_convert_resolution(hw_y_res); 3136696777cSDuson Lin 3146696777cSDuson Lin return 0; 3156696777cSDuson Lin } 3166696777cSDuson Lin 3176696777cSDuson Lin /* 3186696777cSDuson Lin ********************************************************** 3196696777cSDuson Lin * IAP firmware updater related routines 3206696777cSDuson Lin ********************************************************** 3216696777cSDuson Lin */ 3226696777cSDuson Lin static int elan_write_fw_block(struct elan_tp_data *data, 3236696777cSDuson Lin const u8 *page, u16 checksum, int idx) 3246696777cSDuson Lin { 3256696777cSDuson Lin int retry = ETP_RETRY_COUNT; 3266696777cSDuson Lin int error; 3276696777cSDuson Lin 3286696777cSDuson Lin do { 3296696777cSDuson Lin error = data->ops->write_fw_block(data->client, 3306696777cSDuson Lin page, checksum, idx); 3316696777cSDuson Lin if (!error) 3326696777cSDuson Lin return 0; 3336696777cSDuson Lin 3346696777cSDuson Lin dev_dbg(&data->client->dev, 3356696777cSDuson Lin "IAP retrying page %d (error: %d)\n", idx, error); 3366696777cSDuson Lin } while (--retry > 0); 3376696777cSDuson Lin 3386696777cSDuson Lin return error; 3396696777cSDuson Lin } 3406696777cSDuson Lin 3416696777cSDuson Lin static int __elan_update_firmware(struct elan_tp_data *data, 3426696777cSDuson Lin const struct firmware *fw) 3436696777cSDuson Lin { 3446696777cSDuson Lin struct i2c_client *client = data->client; 3456696777cSDuson Lin struct device *dev = &client->dev; 3466696777cSDuson Lin int i, j; 3476696777cSDuson Lin int error; 3486696777cSDuson Lin u16 iap_start_addr; 3496696777cSDuson Lin u16 boot_page_count; 3506696777cSDuson Lin u16 sw_checksum = 0, fw_checksum = 0; 3516696777cSDuson Lin 3526696777cSDuson Lin error = data->ops->prepare_fw_update(client); 3536696777cSDuson Lin if (error) 3546696777cSDuson Lin return error; 3556696777cSDuson Lin 3566696777cSDuson Lin iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]); 3576696777cSDuson Lin 3586696777cSDuson Lin boot_page_count = (iap_start_addr * 2) / ETP_FW_PAGE_SIZE; 359742f452bSBenson Leung for (i = boot_page_count; i < data->fw_validpage_count; i++) { 3606696777cSDuson Lin u16 checksum = 0; 3616696777cSDuson Lin const u8 *page = &fw->data[i * ETP_FW_PAGE_SIZE]; 3626696777cSDuson Lin 3636696777cSDuson Lin for (j = 0; j < ETP_FW_PAGE_SIZE; j += 2) 3646696777cSDuson Lin checksum += ((page[j + 1] << 8) | page[j]); 3656696777cSDuson Lin 3666696777cSDuson Lin error = elan_write_fw_block(data, page, checksum, i); 3676696777cSDuson Lin if (error) { 3686696777cSDuson Lin dev_err(dev, "write page %d fail: %d\n", i, error); 3696696777cSDuson Lin return error; 3706696777cSDuson Lin } 3716696777cSDuson Lin 3726696777cSDuson Lin sw_checksum += checksum; 3736696777cSDuson Lin } 3746696777cSDuson Lin 3756696777cSDuson Lin /* Wait WDT reset and power on reset */ 3766696777cSDuson Lin msleep(600); 3776696777cSDuson Lin 3786696777cSDuson Lin error = data->ops->finish_fw_update(client, &data->fw_completion); 3796696777cSDuson Lin if (error) 3806696777cSDuson Lin return error; 3816696777cSDuson Lin 3826696777cSDuson Lin error = data->ops->get_checksum(client, true, &fw_checksum); 3836696777cSDuson Lin if (error) 3846696777cSDuson Lin return error; 3856696777cSDuson Lin 3866696777cSDuson Lin if (sw_checksum != fw_checksum) { 3876696777cSDuson Lin dev_err(dev, "checksum diff sw=[%04X], fw=[%04X]\n", 3886696777cSDuson Lin sw_checksum, fw_checksum); 3896696777cSDuson Lin return -EIO; 3906696777cSDuson Lin } 3916696777cSDuson Lin 3926696777cSDuson Lin return 0; 3936696777cSDuson Lin } 3946696777cSDuson Lin 3956696777cSDuson Lin static int elan_update_firmware(struct elan_tp_data *data, 3966696777cSDuson Lin const struct firmware *fw) 3976696777cSDuson Lin { 3986696777cSDuson Lin struct i2c_client *client = data->client; 3996696777cSDuson Lin int retval; 4006696777cSDuson Lin 4016696777cSDuson Lin dev_dbg(&client->dev, "Starting firmware update....\n"); 4026696777cSDuson Lin 4036696777cSDuson Lin disable_irq(client->irq); 4046696777cSDuson Lin data->in_fw_update = true; 4056696777cSDuson Lin 4066696777cSDuson Lin retval = __elan_update_firmware(data, fw); 4076696777cSDuson Lin if (retval) { 4086696777cSDuson Lin dev_err(&client->dev, "firmware update failed: %d\n", retval); 4096696777cSDuson Lin data->ops->iap_reset(client); 4106696777cSDuson Lin } else { 4116696777cSDuson Lin /* Reinitialize TP after fw is updated */ 4126696777cSDuson Lin elan_initialize(data); 4136696777cSDuson Lin elan_query_device_info(data); 4146696777cSDuson Lin } 4156696777cSDuson Lin 4166696777cSDuson Lin data->in_fw_update = false; 4176696777cSDuson Lin enable_irq(client->irq); 4186696777cSDuson Lin 4196696777cSDuson Lin return retval; 4206696777cSDuson Lin } 4216696777cSDuson Lin 4226696777cSDuson Lin /* 4236696777cSDuson Lin ******************************************************************* 4246696777cSDuson Lin * SYSFS attributes 4256696777cSDuson Lin ******************************************************************* 4266696777cSDuson Lin */ 4276696777cSDuson Lin static ssize_t elan_sysfs_read_fw_checksum(struct device *dev, 4286696777cSDuson Lin struct device_attribute *attr, 4296696777cSDuson Lin char *buf) 4306696777cSDuson Lin { 4316696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 4326696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 4336696777cSDuson Lin 4346696777cSDuson Lin return sprintf(buf, "0x%04x\n", data->fw_checksum); 4356696777cSDuson Lin } 4366696777cSDuson Lin 4376696777cSDuson Lin static ssize_t elan_sysfs_read_product_id(struct device *dev, 4386696777cSDuson Lin struct device_attribute *attr, 4396696777cSDuson Lin char *buf) 4406696777cSDuson Lin { 4416696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 4426696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 4436696777cSDuson Lin 4447b9f1830SCharlie Mooney return sprintf(buf, ETP_PRODUCT_ID_FORMAT_STRING "\n", 4457b9f1830SCharlie Mooney data->product_id); 4466696777cSDuson Lin } 4476696777cSDuson Lin 4486696777cSDuson Lin static ssize_t elan_sysfs_read_fw_ver(struct device *dev, 4496696777cSDuson Lin struct device_attribute *attr, 4506696777cSDuson Lin char *buf) 4516696777cSDuson Lin { 4526696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 4536696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 4546696777cSDuson Lin 4556696777cSDuson Lin return sprintf(buf, "%d.0\n", data->fw_version); 4566696777cSDuson Lin } 4576696777cSDuson Lin 4586696777cSDuson Lin static ssize_t elan_sysfs_read_sm_ver(struct device *dev, 4596696777cSDuson Lin struct device_attribute *attr, 4606696777cSDuson Lin char *buf) 4616696777cSDuson Lin { 4626696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 4636696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 4646696777cSDuson Lin 4656696777cSDuson Lin return sprintf(buf, "%d.0\n", data->sm_version); 4666696777cSDuson Lin } 4676696777cSDuson Lin 4686696777cSDuson Lin static ssize_t elan_sysfs_read_iap_ver(struct device *dev, 4696696777cSDuson Lin struct device_attribute *attr, 4706696777cSDuson Lin char *buf) 4716696777cSDuson Lin { 4726696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 4736696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 4746696777cSDuson Lin 4756696777cSDuson Lin return sprintf(buf, "%d.0\n", data->iap_version); 4766696777cSDuson Lin } 4776696777cSDuson Lin 4786696777cSDuson Lin static ssize_t elan_sysfs_update_fw(struct device *dev, 4796696777cSDuson Lin struct device_attribute *attr, 4806696777cSDuson Lin const char *buf, size_t count) 4816696777cSDuson Lin { 482bb03bf3fSDuson Lin struct elan_tp_data *data = dev_get_drvdata(dev); 4836696777cSDuson Lin const struct firmware *fw; 4847b9f1830SCharlie Mooney char *fw_name; 4856696777cSDuson Lin int error; 486bb03bf3fSDuson Lin const u8 *fw_signature; 487bb03bf3fSDuson Lin static const u8 signature[] = {0xAA, 0x55, 0xCC, 0x33, 0xFF, 0xFF}; 4886696777cSDuson Lin 4897b9f1830SCharlie Mooney /* Look for a firmware with the product id appended. */ 4907b9f1830SCharlie Mooney fw_name = kasprintf(GFP_KERNEL, ETP_FW_NAME, data->product_id); 4917b9f1830SCharlie Mooney if (!fw_name) { 4927b9f1830SCharlie Mooney dev_err(dev, "failed to allocate memory for firmware name\n"); 4937b9f1830SCharlie Mooney return -ENOMEM; 4947b9f1830SCharlie Mooney } 4957b9f1830SCharlie Mooney 4967b9f1830SCharlie Mooney dev_info(dev, "requesting fw '%s'\n", fw_name); 4977b9f1830SCharlie Mooney error = request_firmware(&fw, fw_name, dev); 4987b9f1830SCharlie Mooney kfree(fw_name); 4996696777cSDuson Lin if (error) { 5007b9f1830SCharlie Mooney dev_err(dev, "failed to request firmware: %d\n", error); 5016696777cSDuson Lin return error; 5026696777cSDuson Lin } 5036696777cSDuson Lin 504bb03bf3fSDuson Lin /* Firmware file must match signature data */ 50512018ac3SDuson Lin fw_signature = &fw->data[data->fw_signature_address]; 506bb03bf3fSDuson Lin if (memcmp(fw_signature, signature, sizeof(signature)) != 0) { 507bb03bf3fSDuson Lin dev_err(dev, "signature mismatch (expected %*ph, got %*ph)\n", 508bb03bf3fSDuson Lin (int)sizeof(signature), signature, 509bb03bf3fSDuson Lin (int)sizeof(signature), fw_signature); 5106696777cSDuson Lin error = -EBADF; 5116696777cSDuson Lin goto out_release_fw; 5126696777cSDuson Lin } 5136696777cSDuson Lin 5146696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 5156696777cSDuson Lin if (error) 5166696777cSDuson Lin goto out_release_fw; 5176696777cSDuson Lin 5186696777cSDuson Lin error = elan_update_firmware(data, fw); 5196696777cSDuson Lin 5206696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 5216696777cSDuson Lin 5226696777cSDuson Lin out_release_fw: 5236696777cSDuson Lin release_firmware(fw); 5246696777cSDuson Lin return error ?: count; 5256696777cSDuson Lin } 5266696777cSDuson Lin 5276696777cSDuson Lin static ssize_t calibrate_store(struct device *dev, 5286696777cSDuson Lin struct device_attribute *attr, 5296696777cSDuson Lin const char *buf, size_t count) 5306696777cSDuson Lin { 5316696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5326696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5336696777cSDuson Lin int tries = 20; 5346696777cSDuson Lin int retval; 5356696777cSDuson Lin int error; 5366696777cSDuson Lin u8 val[3]; 5376696777cSDuson Lin 5386696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 5396696777cSDuson Lin if (retval) 5406696777cSDuson Lin return retval; 5416696777cSDuson Lin 5426696777cSDuson Lin disable_irq(client->irq); 5436696777cSDuson Lin 5446696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 5456696777cSDuson Lin retval = data->ops->set_mode(client, data->mode); 5466696777cSDuson Lin if (retval) { 5476696777cSDuson Lin dev_err(dev, "failed to enable calibration mode: %d\n", 5486696777cSDuson Lin retval); 5496696777cSDuson Lin goto out; 5506696777cSDuson Lin } 5516696777cSDuson Lin 5526696777cSDuson Lin retval = data->ops->calibrate(client); 5536696777cSDuson Lin if (retval) { 5546696777cSDuson Lin dev_err(dev, "failed to start calibration: %d\n", 5556696777cSDuson Lin retval); 5566696777cSDuson Lin goto out_disable_calibrate; 5576696777cSDuson Lin } 5586696777cSDuson Lin 5596696777cSDuson Lin val[0] = 0xff; 5606696777cSDuson Lin do { 5616696777cSDuson Lin /* Wait 250ms before checking if calibration has completed. */ 5626696777cSDuson Lin msleep(250); 5636696777cSDuson Lin 5646696777cSDuson Lin retval = data->ops->calibrate_result(client, val); 5656696777cSDuson Lin if (retval) 5666696777cSDuson Lin dev_err(dev, "failed to check calibration result: %d\n", 5676696777cSDuson Lin retval); 5686696777cSDuson Lin else if (val[0] == 0) 5696696777cSDuson Lin break; /* calibration done */ 5706696777cSDuson Lin 5716696777cSDuson Lin } while (--tries); 5726696777cSDuson Lin 5736696777cSDuson Lin if (tries == 0) { 5746696777cSDuson Lin dev_err(dev, "failed to calibrate. Timeout.\n"); 5756696777cSDuson Lin retval = -ETIMEDOUT; 5766696777cSDuson Lin } 5776696777cSDuson Lin 5786696777cSDuson Lin out_disable_calibrate: 5796696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 5806696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 5816696777cSDuson Lin if (error) { 5826696777cSDuson Lin dev_err(dev, "failed to disable calibration mode: %d\n", 5836696777cSDuson Lin error); 5846696777cSDuson Lin if (!retval) 5856696777cSDuson Lin retval = error; 5866696777cSDuson Lin } 5876696777cSDuson Lin out: 5886696777cSDuson Lin enable_irq(client->irq); 5896696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 5906696777cSDuson Lin return retval ?: count; 5916696777cSDuson Lin } 5926696777cSDuson Lin 5936696777cSDuson Lin static ssize_t elan_sysfs_read_mode(struct device *dev, 5946696777cSDuson Lin struct device_attribute *attr, 5956696777cSDuson Lin char *buf) 5966696777cSDuson Lin { 5976696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5986696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5996696777cSDuson Lin int error; 6006696777cSDuson Lin enum tp_mode mode; 6016696777cSDuson Lin 6026696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 6036696777cSDuson Lin if (error) 6046696777cSDuson Lin return error; 6056696777cSDuson Lin 6066696777cSDuson Lin error = data->ops->iap_get_mode(data->client, &mode); 6076696777cSDuson Lin 6086696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6096696777cSDuson Lin 6106696777cSDuson Lin if (error) 6116696777cSDuson Lin return error; 6126696777cSDuson Lin 6136696777cSDuson Lin return sprintf(buf, "%d\n", (int)mode); 6146696777cSDuson Lin } 6156696777cSDuson Lin 6166696777cSDuson Lin static DEVICE_ATTR(product_id, S_IRUGO, elan_sysfs_read_product_id, NULL); 6176696777cSDuson Lin static DEVICE_ATTR(firmware_version, S_IRUGO, elan_sysfs_read_fw_ver, NULL); 6186696777cSDuson Lin static DEVICE_ATTR(sample_version, S_IRUGO, elan_sysfs_read_sm_ver, NULL); 6196696777cSDuson Lin static DEVICE_ATTR(iap_version, S_IRUGO, elan_sysfs_read_iap_ver, NULL); 6206696777cSDuson Lin static DEVICE_ATTR(fw_checksum, S_IRUGO, elan_sysfs_read_fw_checksum, NULL); 6216696777cSDuson Lin static DEVICE_ATTR(mode, S_IRUGO, elan_sysfs_read_mode, NULL); 6226696777cSDuson Lin static DEVICE_ATTR(update_fw, S_IWUSR, NULL, elan_sysfs_update_fw); 6236696777cSDuson Lin 6246696777cSDuson Lin static DEVICE_ATTR_WO(calibrate); 6256696777cSDuson Lin 6266696777cSDuson Lin static struct attribute *elan_sysfs_entries[] = { 6276696777cSDuson Lin &dev_attr_product_id.attr, 6286696777cSDuson Lin &dev_attr_firmware_version.attr, 6296696777cSDuson Lin &dev_attr_sample_version.attr, 6306696777cSDuson Lin &dev_attr_iap_version.attr, 6316696777cSDuson Lin &dev_attr_fw_checksum.attr, 6326696777cSDuson Lin &dev_attr_calibrate.attr, 6336696777cSDuson Lin &dev_attr_mode.attr, 6346696777cSDuson Lin &dev_attr_update_fw.attr, 6356696777cSDuson Lin NULL, 6366696777cSDuson Lin }; 6376696777cSDuson Lin 6386696777cSDuson Lin static const struct attribute_group elan_sysfs_group = { 6396696777cSDuson Lin .attrs = elan_sysfs_entries, 6406696777cSDuson Lin }; 6416696777cSDuson Lin 6426696777cSDuson Lin static ssize_t acquire_store(struct device *dev, struct device_attribute *attr, 6436696777cSDuson Lin const char *buf, size_t count) 6446696777cSDuson Lin { 6456696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6466696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6476696777cSDuson Lin int error; 6486696777cSDuson Lin int retval; 6496696777cSDuson Lin 6506696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 6516696777cSDuson Lin if (retval) 6526696777cSDuson Lin return retval; 6536696777cSDuson Lin 6546696777cSDuson Lin disable_irq(client->irq); 6556696777cSDuson Lin 6566696777cSDuson Lin data->baseline_ready = false; 6576696777cSDuson Lin 6586696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 6596696777cSDuson Lin retval = data->ops->set_mode(data->client, data->mode); 6606696777cSDuson Lin if (retval) { 6616696777cSDuson Lin dev_err(dev, "Failed to enable calibration mode to get baseline: %d\n", 6626696777cSDuson Lin retval); 6636696777cSDuson Lin goto out; 6646696777cSDuson Lin } 6656696777cSDuson Lin 6666696777cSDuson Lin msleep(250); 6676696777cSDuson Lin 6686696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, true, 6696696777cSDuson Lin &data->max_baseline); 6706696777cSDuson Lin if (retval) { 6716696777cSDuson Lin dev_err(dev, "Failed to read max baseline form device: %d\n", 6726696777cSDuson Lin retval); 6736696777cSDuson Lin goto out_disable_calibrate; 6746696777cSDuson Lin } 6756696777cSDuson Lin 6766696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, false, 6776696777cSDuson Lin &data->min_baseline); 6786696777cSDuson Lin if (retval) { 6796696777cSDuson Lin dev_err(dev, "Failed to read min baseline form device: %d\n", 6806696777cSDuson Lin retval); 6816696777cSDuson Lin goto out_disable_calibrate; 6826696777cSDuson Lin } 6836696777cSDuson Lin 6846696777cSDuson Lin data->baseline_ready = true; 6856696777cSDuson Lin 6866696777cSDuson Lin out_disable_calibrate: 6876696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 6886696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 6896696777cSDuson Lin if (error) { 6906696777cSDuson Lin dev_err(dev, "Failed to disable calibration mode after acquiring baseline: %d\n", 6916696777cSDuson Lin error); 6926696777cSDuson Lin if (!retval) 6936696777cSDuson Lin retval = error; 6946696777cSDuson Lin } 6956696777cSDuson Lin out: 6966696777cSDuson Lin enable_irq(client->irq); 6976696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6986696777cSDuson Lin return retval ?: count; 6996696777cSDuson Lin } 7006696777cSDuson Lin 7016696777cSDuson Lin static ssize_t min_show(struct device *dev, 7026696777cSDuson Lin struct device_attribute *attr, char *buf) 7036696777cSDuson Lin { 7046696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7056696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7066696777cSDuson Lin int retval; 7076696777cSDuson Lin 7086696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 7096696777cSDuson Lin if (retval) 7106696777cSDuson Lin return retval; 7116696777cSDuson Lin 7126696777cSDuson Lin if (!data->baseline_ready) { 7136696777cSDuson Lin retval = -ENODATA; 7146696777cSDuson Lin goto out; 7156696777cSDuson Lin } 7166696777cSDuson Lin 7176696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->min_baseline); 7186696777cSDuson Lin 7196696777cSDuson Lin out: 7206696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7216696777cSDuson Lin return retval; 7226696777cSDuson Lin } 7236696777cSDuson Lin 7246696777cSDuson Lin static ssize_t max_show(struct device *dev, 7256696777cSDuson Lin struct device_attribute *attr, char *buf) 7266696777cSDuson Lin { 7276696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7286696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7296696777cSDuson Lin int retval; 7306696777cSDuson Lin 7316696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 7326696777cSDuson Lin if (retval) 7336696777cSDuson Lin return retval; 7346696777cSDuson Lin 7356696777cSDuson Lin if (!data->baseline_ready) { 7366696777cSDuson Lin retval = -ENODATA; 7376696777cSDuson Lin goto out; 7386696777cSDuson Lin } 7396696777cSDuson Lin 7406696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->max_baseline); 7416696777cSDuson Lin 7426696777cSDuson Lin out: 7436696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7446696777cSDuson Lin return retval; 7456696777cSDuson Lin } 7466696777cSDuson Lin 7476696777cSDuson Lin 7486696777cSDuson Lin static DEVICE_ATTR_WO(acquire); 7496696777cSDuson Lin static DEVICE_ATTR_RO(min); 7506696777cSDuson Lin static DEVICE_ATTR_RO(max); 7516696777cSDuson Lin 7526696777cSDuson Lin static struct attribute *elan_baseline_sysfs_entries[] = { 7536696777cSDuson Lin &dev_attr_acquire.attr, 7546696777cSDuson Lin &dev_attr_min.attr, 7556696777cSDuson Lin &dev_attr_max.attr, 7566696777cSDuson Lin NULL, 7576696777cSDuson Lin }; 7586696777cSDuson Lin 7596696777cSDuson Lin static const struct attribute_group elan_baseline_sysfs_group = { 7606696777cSDuson Lin .name = "baseline", 7616696777cSDuson Lin .attrs = elan_baseline_sysfs_entries, 7626696777cSDuson Lin }; 7636696777cSDuson Lin 7646696777cSDuson Lin static const struct attribute_group *elan_sysfs_groups[] = { 7656696777cSDuson Lin &elan_sysfs_group, 7666696777cSDuson Lin &elan_baseline_sysfs_group, 7676696777cSDuson Lin NULL 7686696777cSDuson Lin }; 7696696777cSDuson Lin 7706696777cSDuson Lin /* 7716696777cSDuson Lin ****************************************************************** 7726696777cSDuson Lin * Elan isr functions 7736696777cSDuson Lin ****************************************************************** 7746696777cSDuson Lin */ 7756696777cSDuson Lin static void elan_report_contact(struct elan_tp_data *data, 7766696777cSDuson Lin int contact_num, bool contact_valid, 777539c4b88Sduson u8 *finger_data) 7786696777cSDuson Lin { 7796696777cSDuson Lin struct input_dev *input = data->input; 7806696777cSDuson Lin unsigned int pos_x, pos_y; 7816696777cSDuson Lin unsigned int pressure, mk_x, mk_y; 782b9bced0eSduson unsigned int area_x, area_y, major, minor; 783b9bced0eSduson unsigned int scaled_pressure; 7846696777cSDuson Lin 7856696777cSDuson Lin if (contact_valid) { 7866696777cSDuson Lin pos_x = ((finger_data[0] & 0xf0) << 4) | 7876696777cSDuson Lin finger_data[1]; 7886696777cSDuson Lin pos_y = ((finger_data[0] & 0x0f) << 8) | 7896696777cSDuson Lin finger_data[2]; 7906696777cSDuson Lin mk_x = (finger_data[3] & 0x0f); 7916696777cSDuson Lin mk_y = (finger_data[3] >> 4); 7926696777cSDuson Lin pressure = finger_data[4]; 7936696777cSDuson Lin 7946696777cSDuson Lin if (pos_x > data->max_x || pos_y > data->max_y) { 7956696777cSDuson Lin dev_dbg(input->dev.parent, 7966696777cSDuson Lin "[%d] x=%d y=%d over max (%d, %d)", 7976696777cSDuson Lin contact_num, pos_x, pos_y, 7986696777cSDuson Lin data->max_x, data->max_y); 7996696777cSDuson Lin return; 8006696777cSDuson Lin } 8016696777cSDuson Lin 8026696777cSDuson Lin /* 8036696777cSDuson Lin * To avoid treating large finger as palm, let's reduce the 8046696777cSDuson Lin * width x and y per trace. 8056696777cSDuson Lin */ 8066696777cSDuson Lin area_x = mk_x * (data->width_x - ETP_FWIDTH_REDUCE); 8076696777cSDuson Lin area_y = mk_y * (data->width_y - ETP_FWIDTH_REDUCE); 8086696777cSDuson Lin 8096696777cSDuson Lin major = max(area_x, area_y); 8106696777cSDuson Lin minor = min(area_x, area_y); 8116696777cSDuson Lin 812b9bced0eSduson scaled_pressure = pressure + data->pressure_adjustment; 813b9bced0eSduson 814b9bced0eSduson if (scaled_pressure > ETP_MAX_PRESSURE) 815b9bced0eSduson scaled_pressure = ETP_MAX_PRESSURE; 8166696777cSDuson Lin 8176696777cSDuson Lin input_mt_slot(input, contact_num); 8186696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 8196696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_X, pos_x); 8206696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_Y, data->max_y - pos_y); 821539c4b88Sduson input_report_abs(input, ABS_MT_PRESSURE, scaled_pressure); 8226696777cSDuson Lin input_report_abs(input, ABS_TOOL_WIDTH, mk_x); 8236696777cSDuson Lin input_report_abs(input, ABS_MT_TOUCH_MAJOR, major); 8246696777cSDuson Lin input_report_abs(input, ABS_MT_TOUCH_MINOR, minor); 8256696777cSDuson Lin } else { 8266696777cSDuson Lin input_mt_slot(input, contact_num); 8276696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, false); 8286696777cSDuson Lin } 8296696777cSDuson Lin } 8306696777cSDuson Lin 8316696777cSDuson Lin static void elan_report_absolute(struct elan_tp_data *data, u8 *packet) 8326696777cSDuson Lin { 8336696777cSDuson Lin struct input_dev *input = data->input; 8346696777cSDuson Lin u8 *finger_data = &packet[ETP_FINGER_DATA_OFFSET]; 8356696777cSDuson Lin int i; 8366696777cSDuson Lin u8 tp_info = packet[ETP_TOUCH_INFO_OFFSET]; 837090ad325SDuson Lin u8 hover_info = packet[ETP_HOVER_INFO_OFFSET]; 838090ad325SDuson Lin bool contact_valid, hover_event; 8396696777cSDuson Lin 840090ad325SDuson Lin hover_event = hover_info & 0x40; 8416696777cSDuson Lin for (i = 0; i < ETP_MAX_FINGERS; i++) { 8426696777cSDuson Lin contact_valid = tp_info & (1U << (3 + i)); 843539c4b88Sduson elan_report_contact(data, i, contact_valid, finger_data); 8446696777cSDuson Lin 8456696777cSDuson Lin if (contact_valid) 8466696777cSDuson Lin finger_data += ETP_FINGER_DATA_LEN; 8476696777cSDuson Lin } 8486696777cSDuson Lin 8496696777cSDuson Lin input_report_key(input, BTN_LEFT, tp_info & 0x01); 850539c4b88Sduson input_report_abs(input, ABS_DISTANCE, hover_event != 0); 8516696777cSDuson Lin input_mt_report_pointer_emulation(input, true); 8526696777cSDuson Lin input_sync(input); 8536696777cSDuson Lin } 8546696777cSDuson Lin 8556696777cSDuson Lin static irqreturn_t elan_isr(int irq, void *dev_id) 8566696777cSDuson Lin { 8576696777cSDuson Lin struct elan_tp_data *data = dev_id; 8586696777cSDuson Lin struct device *dev = &data->client->dev; 8596696777cSDuson Lin int error; 8606696777cSDuson Lin u8 report[ETP_MAX_REPORT_LEN]; 8616696777cSDuson Lin 8626696777cSDuson Lin /* 8636696777cSDuson Lin * When device is connected to i2c bus, when all IAP page writes 8646696777cSDuson Lin * complete, the driver will receive interrupt and must read 8656696777cSDuson Lin * 0000 to confirm that IAP is finished. 8666696777cSDuson Lin */ 8676696777cSDuson Lin if (data->in_fw_update) { 8686696777cSDuson Lin complete(&data->fw_completion); 8696696777cSDuson Lin goto out; 8706696777cSDuson Lin } 8716696777cSDuson Lin 8726696777cSDuson Lin error = data->ops->get_report(data->client, report); 8736696777cSDuson Lin if (error) 8746696777cSDuson Lin goto out; 8756696777cSDuson Lin 8766696777cSDuson Lin if (report[ETP_REPORT_ID_OFFSET] != ETP_REPORT_ID) 8776696777cSDuson Lin dev_err(dev, "invalid report id data (%x)\n", 8786696777cSDuson Lin report[ETP_REPORT_ID_OFFSET]); 8796696777cSDuson Lin else 8806696777cSDuson Lin elan_report_absolute(data, report); 8816696777cSDuson Lin 8826696777cSDuson Lin out: 8836696777cSDuson Lin return IRQ_HANDLED; 8846696777cSDuson Lin } 8856696777cSDuson Lin 8866696777cSDuson Lin /* 8876696777cSDuson Lin ****************************************************************** 8886696777cSDuson Lin * Elan initialization functions 8896696777cSDuson Lin ****************************************************************** 8906696777cSDuson Lin */ 8916696777cSDuson Lin static int elan_setup_input_device(struct elan_tp_data *data) 8926696777cSDuson Lin { 8936696777cSDuson Lin struct device *dev = &data->client->dev; 8946696777cSDuson Lin struct input_dev *input; 8956696777cSDuson Lin unsigned int max_width = max(data->width_x, data->width_y); 8966696777cSDuson Lin unsigned int min_width = min(data->width_x, data->width_y); 8976696777cSDuson Lin int error; 8986696777cSDuson Lin 8996696777cSDuson Lin input = devm_input_allocate_device(dev); 9006696777cSDuson Lin if (!input) 9016696777cSDuson Lin return -ENOMEM; 9026696777cSDuson Lin 9036696777cSDuson Lin input->name = "Elan Touchpad"; 9046696777cSDuson Lin input->id.bustype = BUS_I2C; 9056696777cSDuson Lin input_set_drvdata(input, data); 9066696777cSDuson Lin 9076696777cSDuson Lin error = input_mt_init_slots(input, ETP_MAX_FINGERS, 9086696777cSDuson Lin INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 9096696777cSDuson Lin if (error) { 9106696777cSDuson Lin dev_err(dev, "failed to initialize MT slots: %d\n", error); 9116696777cSDuson Lin return error; 9126696777cSDuson Lin } 9136696777cSDuson Lin 9146696777cSDuson Lin __set_bit(EV_ABS, input->evbit); 9156696777cSDuson Lin __set_bit(INPUT_PROP_POINTER, input->propbit); 9166696777cSDuson Lin __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 9176696777cSDuson Lin __set_bit(BTN_LEFT, input->keybit); 9186696777cSDuson Lin 9196696777cSDuson Lin /* Set up ST parameters */ 9206696777cSDuson Lin input_set_abs_params(input, ABS_X, 0, data->max_x, 0, 0); 9216696777cSDuson Lin input_set_abs_params(input, ABS_Y, 0, data->max_y, 0, 0); 9226696777cSDuson Lin input_abs_set_res(input, ABS_X, data->x_res); 9236696777cSDuson Lin input_abs_set_res(input, ABS_Y, data->y_res); 9246696777cSDuson Lin input_set_abs_params(input, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0); 9256696777cSDuson Lin input_set_abs_params(input, ABS_TOOL_WIDTH, 0, ETP_FINGER_WIDTH, 0, 0); 926539c4b88Sduson input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 9276696777cSDuson Lin 9286696777cSDuson Lin /* And MT parameters */ 9296696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); 9306696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); 9316696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_X, data->x_res); 9326696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_Y, data->y_res); 9336696777cSDuson Lin input_set_abs_params(input, ABS_MT_PRESSURE, 0, 9346696777cSDuson Lin ETP_MAX_PRESSURE, 0, 0); 9356696777cSDuson Lin input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 9366696777cSDuson Lin ETP_FINGER_WIDTH * max_width, 0, 0); 9376696777cSDuson Lin input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 9386696777cSDuson Lin ETP_FINGER_WIDTH * min_width, 0, 0); 9396696777cSDuson Lin 9406696777cSDuson Lin data->input = input; 9416696777cSDuson Lin 9426696777cSDuson Lin return 0; 9436696777cSDuson Lin } 9446696777cSDuson Lin 9456696777cSDuson Lin static void elan_disable_regulator(void *_data) 9466696777cSDuson Lin { 9476696777cSDuson Lin struct elan_tp_data *data = _data; 9486696777cSDuson Lin 9496696777cSDuson Lin regulator_disable(data->vcc); 9506696777cSDuson Lin } 9516696777cSDuson Lin 9526696777cSDuson Lin static void elan_remove_sysfs_groups(void *_data) 9536696777cSDuson Lin { 9546696777cSDuson Lin struct elan_tp_data *data = _data; 9556696777cSDuson Lin 9566696777cSDuson Lin sysfs_remove_groups(&data->client->dev.kobj, elan_sysfs_groups); 9576696777cSDuson Lin } 9586696777cSDuson Lin 9596696777cSDuson Lin static int elan_probe(struct i2c_client *client, 9606696777cSDuson Lin const struct i2c_device_id *dev_id) 9616696777cSDuson Lin { 9626696777cSDuson Lin const struct elan_transport_ops *transport_ops; 9636696777cSDuson Lin struct device *dev = &client->dev; 9646696777cSDuson Lin struct elan_tp_data *data; 9656696777cSDuson Lin unsigned long irqflags; 9666696777cSDuson Lin int error; 9676696777cSDuson Lin 9686696777cSDuson Lin if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_I2C) && 9696696777cSDuson Lin i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 9706696777cSDuson Lin transport_ops = &elan_i2c_ops; 9716696777cSDuson Lin } else if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) && 9726696777cSDuson Lin i2c_check_functionality(client->adapter, 9736696777cSDuson Lin I2C_FUNC_SMBUS_BYTE_DATA | 9746696777cSDuson Lin I2C_FUNC_SMBUS_BLOCK_DATA | 9756696777cSDuson Lin I2C_FUNC_SMBUS_I2C_BLOCK)) { 9766696777cSDuson Lin transport_ops = &elan_smbus_ops; 9776696777cSDuson Lin } else { 9786696777cSDuson Lin dev_err(dev, "not a supported I2C/SMBus adapter\n"); 9796696777cSDuson Lin return -EIO; 9806696777cSDuson Lin } 9816696777cSDuson Lin 9826696777cSDuson Lin data = devm_kzalloc(&client->dev, sizeof(struct elan_tp_data), 9836696777cSDuson Lin GFP_KERNEL); 9846696777cSDuson Lin if (!data) 9856696777cSDuson Lin return -ENOMEM; 9866696777cSDuson Lin 9876696777cSDuson Lin i2c_set_clientdata(client, data); 9886696777cSDuson Lin 9896696777cSDuson Lin data->ops = transport_ops; 9906696777cSDuson Lin data->client = client; 9916696777cSDuson Lin init_completion(&data->fw_completion); 9926696777cSDuson Lin mutex_init(&data->sysfs_mutex); 9936696777cSDuson Lin 9946696777cSDuson Lin data->vcc = devm_regulator_get(&client->dev, "vcc"); 9956696777cSDuson Lin if (IS_ERR(data->vcc)) { 9966696777cSDuson Lin error = PTR_ERR(data->vcc); 9976696777cSDuson Lin if (error != -EPROBE_DEFER) 9986696777cSDuson Lin dev_err(&client->dev, 9996696777cSDuson Lin "Failed to get 'vcc' regulator: %d\n", 10006696777cSDuson Lin error); 10016696777cSDuson Lin return error; 10026696777cSDuson Lin } 10036696777cSDuson Lin 10046696777cSDuson Lin error = regulator_enable(data->vcc); 10056696777cSDuson Lin if (error) { 10066696777cSDuson Lin dev_err(&client->dev, 10076696777cSDuson Lin "Failed to enable regulator: %d\n", error); 10086696777cSDuson Lin return error; 10096696777cSDuson Lin } 10106696777cSDuson Lin 10116696777cSDuson Lin error = devm_add_action(&client->dev, 10126696777cSDuson Lin elan_disable_regulator, data); 10136696777cSDuson Lin if (error) { 10146696777cSDuson Lin regulator_disable(data->vcc); 10156696777cSDuson Lin dev_err(&client->dev, 10166696777cSDuson Lin "Failed to add disable regulator action: %d\n", 10176696777cSDuson Lin error); 10186696777cSDuson Lin return error; 10196696777cSDuson Lin } 10206696777cSDuson Lin 10216696777cSDuson Lin /* Initialize the touchpad. */ 10226696777cSDuson Lin error = elan_initialize(data); 10236696777cSDuson Lin if (error) 10246696777cSDuson Lin return error; 10256696777cSDuson Lin 10266696777cSDuson Lin error = elan_query_device_info(data); 10276696777cSDuson Lin if (error) 10286696777cSDuson Lin return error; 10296696777cSDuson Lin 10306696777cSDuson Lin error = elan_query_device_parameters(data); 10316696777cSDuson Lin if (error) 10326696777cSDuson Lin return error; 10336696777cSDuson Lin 10346696777cSDuson Lin dev_dbg(&client->dev, 10356696777cSDuson Lin "Elan Touchpad Information:\n" 10366696777cSDuson Lin " Module product ID: 0x%04x\n" 10376696777cSDuson Lin " Firmware Version: 0x%04x\n" 10386696777cSDuson Lin " Sample Version: 0x%04x\n" 10396696777cSDuson Lin " IAP Version: 0x%04x\n" 10406696777cSDuson Lin " Max ABS X,Y: %d,%d\n" 10416696777cSDuson Lin " Width X,Y: %d,%d\n" 10426696777cSDuson Lin " Resolution X,Y: %d,%d (dots/mm)\n", 10436696777cSDuson Lin data->product_id, 10446696777cSDuson Lin data->fw_version, 10456696777cSDuson Lin data->sm_version, 10466696777cSDuson Lin data->iap_version, 10476696777cSDuson Lin data->max_x, data->max_y, 10486696777cSDuson Lin data->width_x, data->width_y, 10496696777cSDuson Lin data->x_res, data->y_res); 10506696777cSDuson Lin 10516696777cSDuson Lin /* Set up input device properties based on queried parameters. */ 10526696777cSDuson Lin error = elan_setup_input_device(data); 10536696777cSDuson Lin if (error) 10546696777cSDuson Lin return error; 10556696777cSDuson Lin 10566696777cSDuson Lin /* 10576696777cSDuson Lin * Systems using device tree should set up interrupt via DTS, 10586696777cSDuson Lin * the rest will use the default falling edge interrupts. 10596696777cSDuson Lin */ 10606696777cSDuson Lin irqflags = client->dev.of_node ? 0 : IRQF_TRIGGER_FALLING; 10616696777cSDuson Lin 10626696777cSDuson Lin error = devm_request_threaded_irq(&client->dev, client->irq, 10636696777cSDuson Lin NULL, elan_isr, 10646696777cSDuson Lin irqflags | IRQF_ONESHOT, 10656696777cSDuson Lin client->name, data); 10666696777cSDuson Lin if (error) { 10676696777cSDuson Lin dev_err(&client->dev, "cannot register irq=%d\n", client->irq); 10686696777cSDuson Lin return error; 10696696777cSDuson Lin } 10706696777cSDuson Lin 10716696777cSDuson Lin error = sysfs_create_groups(&client->dev.kobj, elan_sysfs_groups); 10726696777cSDuson Lin if (error) { 10736696777cSDuson Lin dev_err(&client->dev, "failed to create sysfs attributes: %d\n", 10746696777cSDuson Lin error); 10756696777cSDuson Lin return error; 10766696777cSDuson Lin } 10776696777cSDuson Lin 10786696777cSDuson Lin error = devm_add_action(&client->dev, 10796696777cSDuson Lin elan_remove_sysfs_groups, data); 10806696777cSDuson Lin if (error) { 10816696777cSDuson Lin elan_remove_sysfs_groups(data); 10826696777cSDuson Lin dev_err(&client->dev, 10836696777cSDuson Lin "Failed to add sysfs cleanup action: %d\n", 10846696777cSDuson Lin error); 10856696777cSDuson Lin return error; 10866696777cSDuson Lin } 10876696777cSDuson Lin 10886696777cSDuson Lin error = input_register_device(data->input); 10896696777cSDuson Lin if (error) { 10906696777cSDuson Lin dev_err(&client->dev, "failed to register input device: %d\n", 10916696777cSDuson Lin error); 10926696777cSDuson Lin return error; 10936696777cSDuson Lin } 10946696777cSDuson Lin 10956696777cSDuson Lin /* 10966696777cSDuson Lin * Systems using device tree should set up wakeup via DTS, 10976696777cSDuson Lin * the rest will configure device as wakeup source by default. 10986696777cSDuson Lin */ 10996696777cSDuson Lin if (!client->dev.of_node) 11006696777cSDuson Lin device_init_wakeup(&client->dev, true); 11016696777cSDuson Lin 11026696777cSDuson Lin return 0; 11036696777cSDuson Lin } 11046696777cSDuson Lin 11056696777cSDuson Lin static int __maybe_unused elan_suspend(struct device *dev) 11066696777cSDuson Lin { 11076696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 11086696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 11096696777cSDuson Lin int ret; 11106696777cSDuson Lin 11116696777cSDuson Lin /* 11126696777cSDuson Lin * We are taking the mutex to make sure sysfs operations are 11136696777cSDuson Lin * complete before we attempt to bring the device into low[er] 11146696777cSDuson Lin * power mode. 11156696777cSDuson Lin */ 11166696777cSDuson Lin ret = mutex_lock_interruptible(&data->sysfs_mutex); 11176696777cSDuson Lin if (ret) 11186696777cSDuson Lin return ret; 11196696777cSDuson Lin 11206696777cSDuson Lin disable_irq(client->irq); 11216696777cSDuson Lin 11226696777cSDuson Lin if (device_may_wakeup(dev)) { 11236696777cSDuson Lin ret = elan_sleep(data); 11246696777cSDuson Lin /* Enable wake from IRQ */ 11256696777cSDuson Lin data->irq_wake = (enable_irq_wake(client->irq) == 0); 11266696777cSDuson Lin } else { 11276696777cSDuson Lin ret = elan_disable_power(data); 11286696777cSDuson Lin } 11296696777cSDuson Lin 11306696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 11316696777cSDuson Lin return ret; 11326696777cSDuson Lin } 11336696777cSDuson Lin 11346696777cSDuson Lin static int __maybe_unused elan_resume(struct device *dev) 11356696777cSDuson Lin { 11366696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 11376696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 11386696777cSDuson Lin int error; 11396696777cSDuson Lin 11406696777cSDuson Lin if (device_may_wakeup(dev) && data->irq_wake) { 11416696777cSDuson Lin disable_irq_wake(client->irq); 11426696777cSDuson Lin data->irq_wake = false; 11436696777cSDuson Lin } 11446696777cSDuson Lin 11456696777cSDuson Lin error = elan_enable_power(data); 1146b3beed7fSDuson Lin if (error) { 11476696777cSDuson Lin dev_err(dev, "power up when resuming failed: %d\n", error); 1148b3beed7fSDuson Lin goto err; 1149b3beed7fSDuson Lin } 11506696777cSDuson Lin 11516696777cSDuson Lin error = elan_initialize(data); 11526696777cSDuson Lin if (error) 11536696777cSDuson Lin dev_err(dev, "initialize when resuming failed: %d\n", error); 11546696777cSDuson Lin 1155b3beed7fSDuson Lin err: 11566696777cSDuson Lin enable_irq(data->client->irq); 1157b3beed7fSDuson Lin return error; 11586696777cSDuson Lin } 11596696777cSDuson Lin 11606696777cSDuson Lin static SIMPLE_DEV_PM_OPS(elan_pm_ops, elan_suspend, elan_resume); 11616696777cSDuson Lin 11626696777cSDuson Lin static const struct i2c_device_id elan_id[] = { 11636696777cSDuson Lin { DRIVER_NAME, 0 }, 11646696777cSDuson Lin { }, 11656696777cSDuson Lin }; 11666696777cSDuson Lin MODULE_DEVICE_TABLE(i2c, elan_id); 11676696777cSDuson Lin 11686696777cSDuson Lin #ifdef CONFIG_ACPI 11696696777cSDuson Lin static const struct acpi_device_id elan_acpi_id[] = { 11706696777cSDuson Lin { "ELAN0000", 0 }, 1171534fcb3bSMichele Curti { "ELAN0100", 0 }, 11726ccfe64cSBenjamin Tissoires { "ELAN0600", 0 }, 11734aeca98cSJoão Paulo Rechi Vita { "ELAN1000", 0 }, 11746696777cSDuson Lin { } 11756696777cSDuson Lin }; 11766696777cSDuson Lin MODULE_DEVICE_TABLE(acpi, elan_acpi_id); 11776696777cSDuson Lin #endif 11786696777cSDuson Lin 11796696777cSDuson Lin #ifdef CONFIG_OF 11806696777cSDuson Lin static const struct of_device_id elan_of_match[] = { 11816696777cSDuson Lin { .compatible = "elan,ekth3000" }, 11826696777cSDuson Lin { /* sentinel */ } 11836696777cSDuson Lin }; 11846696777cSDuson Lin MODULE_DEVICE_TABLE(of, elan_of_match); 11856696777cSDuson Lin #endif 11866696777cSDuson Lin 11876696777cSDuson Lin static struct i2c_driver elan_driver = { 11886696777cSDuson Lin .driver = { 11896696777cSDuson Lin .name = DRIVER_NAME, 11906696777cSDuson Lin .pm = &elan_pm_ops, 11916696777cSDuson Lin .acpi_match_table = ACPI_PTR(elan_acpi_id), 11926696777cSDuson Lin .of_match_table = of_match_ptr(elan_of_match), 119371d0f562SDmitry Torokhov .probe_type = PROBE_PREFER_ASYNCHRONOUS, 11946696777cSDuson Lin }, 11956696777cSDuson Lin .probe = elan_probe, 11966696777cSDuson Lin .id_table = elan_id, 11976696777cSDuson Lin }; 11986696777cSDuson Lin 11996696777cSDuson Lin module_i2c_driver(elan_driver); 12006696777cSDuson Lin 12016696777cSDuson Lin MODULE_AUTHOR("Duson Lin <dusonlin@emc.com.tw>"); 12026696777cSDuson Lin MODULE_DESCRIPTION("Elan I2C/SMBus Touchpad driver"); 12036696777cSDuson Lin MODULE_LICENSE("GPL"); 12046696777cSDuson Lin MODULE_VERSION(ELAN_DRIVER_VERSION); 1205