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> 72de4fcc6SKT Liao * Author: KT Liao <kt.liao@emc.com.tw> 8a2eaf299SKT Liao * Version: 1.6.3 96696777cSDuson Lin * 106696777cSDuson Lin * Based on cyapa driver: 116696777cSDuson Lin * copyright (c) 2011-2012 Cypress Semiconductor, Inc. 126696777cSDuson Lin * copyright (c) 2011-2012 Google, Inc. 136696777cSDuson Lin * 146696777cSDuson Lin * This program is free software; you can redistribute it and/or modify it 156696777cSDuson Lin * under the terms of the GNU General Public License version 2 as published 166696777cSDuson Lin * by the Free Software Foundation. 176696777cSDuson Lin * 186696777cSDuson Lin * Trademarks are the property of their respective owners. 196696777cSDuson Lin */ 206696777cSDuson Lin 216696777cSDuson Lin #include <linux/acpi.h> 226696777cSDuson Lin #include <linux/delay.h> 236696777cSDuson Lin #include <linux/device.h> 246696777cSDuson Lin #include <linux/firmware.h> 256696777cSDuson Lin #include <linux/i2c.h> 266696777cSDuson Lin #include <linux/init.h> 276696777cSDuson Lin #include <linux/input/mt.h> 286696777cSDuson Lin #include <linux/interrupt.h> 29a4b0a58bSDmitry Torokhov #include <linux/irq.h> 306696777cSDuson Lin #include <linux/module.h> 316696777cSDuson Lin #include <linux/slab.h> 326696777cSDuson Lin #include <linux/kernel.h> 336696777cSDuson Lin #include <linux/sched.h> 346696777cSDuson Lin #include <linux/input.h> 356696777cSDuson Lin #include <linux/uaccess.h> 366696777cSDuson Lin #include <linux/jiffies.h> 376696777cSDuson Lin #include <linux/completion.h> 386696777cSDuson Lin #include <linux/of.h> 39559b3df7SBenjamin Tissoires #include <linux/property.h> 406696777cSDuson Lin #include <linux/regulator/consumer.h> 416696777cSDuson Lin #include <asm/unaligned.h> 426696777cSDuson Lin 436696777cSDuson Lin #include "elan_i2c.h" 446696777cSDuson Lin 456696777cSDuson Lin #define DRIVER_NAME "elan_i2c" 463eab4588SCharlie Mooney #define ELAN_VENDOR_ID 0x04f3 476696777cSDuson Lin #define ETP_MAX_PRESSURE 255 486696777cSDuson Lin #define ETP_FWIDTH_REDUCE 90 496696777cSDuson Lin #define ETP_FINGER_WIDTH 15 506696777cSDuson Lin #define ETP_RETRY_COUNT 3 516696777cSDuson Lin 526696777cSDuson Lin #define ETP_MAX_FINGERS 5 536696777cSDuson Lin #define ETP_FINGER_DATA_LEN 5 546696777cSDuson Lin #define ETP_REPORT_ID 0x5D 55559b3df7SBenjamin Tissoires #define ETP_TP_REPORT_ID 0x5E 566696777cSDuson Lin #define ETP_REPORT_ID_OFFSET 2 576696777cSDuson Lin #define ETP_TOUCH_INFO_OFFSET 3 586696777cSDuson Lin #define ETP_FINGER_DATA_OFFSET 4 59090ad325SDuson Lin #define ETP_HOVER_INFO_OFFSET 30 606696777cSDuson Lin #define ETP_MAX_REPORT_LEN 34 616696777cSDuson Lin 626696777cSDuson Lin /* The main device structure */ 636696777cSDuson Lin struct elan_tp_data { 646696777cSDuson Lin struct i2c_client *client; 656696777cSDuson Lin struct input_dev *input; 66559b3df7SBenjamin Tissoires struct input_dev *tp_input; /* trackpoint input node */ 676696777cSDuson Lin struct regulator *vcc; 686696777cSDuson Lin 696696777cSDuson Lin const struct elan_transport_ops *ops; 706696777cSDuson Lin 716696777cSDuson Lin /* for fw update */ 726696777cSDuson Lin struct completion fw_completion; 736696777cSDuson Lin bool in_fw_update; 746696777cSDuson Lin 756696777cSDuson Lin struct mutex sysfs_mutex; 766696777cSDuson Lin 776696777cSDuson Lin unsigned int max_x; 786696777cSDuson Lin unsigned int max_y; 796696777cSDuson Lin unsigned int width_x; 806696777cSDuson Lin unsigned int width_y; 816696777cSDuson Lin unsigned int x_res; 826696777cSDuson Lin unsigned int y_res; 836696777cSDuson Lin 84a2eaf299SKT Liao u8 pattern; 85ed75a14eSDuson Lin u16 product_id; 866696777cSDuson Lin u8 fw_version; 876696777cSDuson Lin u8 sm_version; 886696777cSDuson Lin u8 iap_version; 896696777cSDuson Lin u16 fw_checksum; 90b9bced0eSduson int pressure_adjustment; 916696777cSDuson Lin u8 mode; 92a2eaf299SKT Liao u16 ic_type; 93742f452bSBenson Leung u16 fw_validpage_count; 9412018ac3SDuson Lin u16 fw_signature_address; 956696777cSDuson Lin 966696777cSDuson Lin bool irq_wake; 976696777cSDuson Lin 986696777cSDuson Lin u8 min_baseline; 996696777cSDuson Lin u8 max_baseline; 1006696777cSDuson Lin bool baseline_ready; 10199136881SKT Liao u8 clickpad; 1026696777cSDuson Lin }; 1036696777cSDuson Lin 104a2eaf299SKT Liao static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count, 10512018ac3SDuson Lin u16 *signature_address) 10612018ac3SDuson Lin { 107a2eaf299SKT Liao switch (ic_type) { 10822ef28b4Sduson case 0x00: 10922ef28b4Sduson case 0x06: 110534fcb3bSMichele Curti case 0x08: 111742f452bSBenson Leung *validpage_count = 512; 112534fcb3bSMichele Curti break; 113c84333a1SDuson Lin case 0x03: 11422ef28b4Sduson case 0x07: 11522ef28b4Sduson case 0x09: 11622ef28b4Sduson case 0x0A: 11722ef28b4Sduson case 0x0B: 11822ef28b4Sduson case 0x0C: 119742f452bSBenson Leung *validpage_count = 768; 12012018ac3SDuson Lin break; 12112018ac3SDuson Lin case 0x0D: 122742f452bSBenson Leung *validpage_count = 896; 12312018ac3SDuson Lin break; 12422ef28b4Sduson case 0x0E: 12522ef28b4Sduson *validpage_count = 640; 12622ef28b4Sduson break; 127a2eaf299SKT Liao case 0x10: 128a2eaf299SKT Liao *validpage_count = 1024; 129a2eaf299SKT Liao break; 13012018ac3SDuson Lin default: 13112018ac3SDuson Lin /* unknown ic type clear value */ 132742f452bSBenson Leung *validpage_count = 0; 13312018ac3SDuson Lin *signature_address = 0; 13412018ac3SDuson Lin return -ENXIO; 13512018ac3SDuson Lin } 13612018ac3SDuson Lin 13712018ac3SDuson Lin *signature_address = 138742f452bSBenson Leung (*validpage_count * ETP_FW_PAGE_SIZE) - ETP_FW_SIGNATURE_SIZE; 13912018ac3SDuson Lin 14012018ac3SDuson Lin return 0; 14112018ac3SDuson Lin } 14212018ac3SDuson Lin 1436696777cSDuson Lin static int elan_enable_power(struct elan_tp_data *data) 1446696777cSDuson Lin { 1456696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1466696777cSDuson Lin int error; 1476696777cSDuson Lin 1486696777cSDuson Lin error = regulator_enable(data->vcc); 1496696777cSDuson Lin if (error) { 1506696777cSDuson Lin dev_err(&data->client->dev, 151b3beed7fSDuson Lin "failed to enable regulator: %d\n", error); 1526696777cSDuson Lin return error; 1536696777cSDuson Lin } 1546696777cSDuson Lin 1556696777cSDuson Lin do { 1566696777cSDuson Lin error = data->ops->power_control(data->client, true); 1576696777cSDuson Lin if (error >= 0) 1586696777cSDuson Lin return 0; 1596696777cSDuson Lin 1606696777cSDuson Lin msleep(30); 1616696777cSDuson Lin } while (--repeat > 0); 1626696777cSDuson Lin 163b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to enable power: %d\n", error); 1646696777cSDuson Lin return error; 1656696777cSDuson Lin } 1666696777cSDuson Lin 1676696777cSDuson Lin static int elan_disable_power(struct elan_tp_data *data) 1686696777cSDuson Lin { 1696696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1706696777cSDuson Lin int error; 1716696777cSDuson Lin 1726696777cSDuson Lin do { 1736696777cSDuson Lin error = data->ops->power_control(data->client, false); 1746696777cSDuson Lin if (!error) { 1756696777cSDuson Lin error = regulator_disable(data->vcc); 1766696777cSDuson Lin if (error) { 1776696777cSDuson Lin dev_err(&data->client->dev, 178b3beed7fSDuson Lin "failed to disable regulator: %d\n", 1796696777cSDuson Lin error); 1806696777cSDuson Lin /* Attempt to power the chip back up */ 1816696777cSDuson Lin data->ops->power_control(data->client, true); 1826696777cSDuson Lin break; 1836696777cSDuson Lin } 1846696777cSDuson Lin 1856696777cSDuson Lin return 0; 1866696777cSDuson Lin } 1876696777cSDuson Lin 1886696777cSDuson Lin msleep(30); 1896696777cSDuson Lin } while (--repeat > 0); 1906696777cSDuson Lin 191b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to disable power: %d\n", error); 1926696777cSDuson Lin return error; 1936696777cSDuson Lin } 1946696777cSDuson Lin 1956696777cSDuson Lin static int elan_sleep(struct elan_tp_data *data) 1966696777cSDuson Lin { 1976696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1986696777cSDuson Lin int error; 1996696777cSDuson Lin 2006696777cSDuson Lin do { 2016696777cSDuson Lin error = data->ops->sleep_control(data->client, true); 2026696777cSDuson Lin if (!error) 2036696777cSDuson Lin return 0; 2046696777cSDuson Lin 2056696777cSDuson Lin msleep(30); 2066696777cSDuson Lin } while (--repeat > 0); 2076696777cSDuson Lin 2086696777cSDuson Lin return error; 2096696777cSDuson Lin } 2106696777cSDuson Lin 2112de4fcc6SKT Liao static int elan_query_product(struct elan_tp_data *data) 2122de4fcc6SKT Liao { 2132de4fcc6SKT Liao int error; 2142de4fcc6SKT Liao 2152de4fcc6SKT Liao error = data->ops->get_product_id(data->client, &data->product_id); 2162de4fcc6SKT Liao if (error) 2172de4fcc6SKT Liao return error; 2182de4fcc6SKT Liao 2192de4fcc6SKT Liao error = data->ops->get_sm_version(data->client, &data->ic_type, 22099136881SKT Liao &data->sm_version, &data->clickpad); 2212de4fcc6SKT Liao if (error) 2222de4fcc6SKT Liao return error; 2232de4fcc6SKT Liao 2242de4fcc6SKT Liao return 0; 2252de4fcc6SKT Liao } 2262de4fcc6SKT Liao 2272de4fcc6SKT Liao static int elan_check_ASUS_special_fw(struct elan_tp_data *data) 2282de4fcc6SKT Liao { 22992ef6f97SMatjaz Hegedic if (data->ic_type == 0x0E) { 2302de4fcc6SKT Liao switch (data->product_id) { 2312de4fcc6SKT Liao case 0x05 ... 0x07: 2322de4fcc6SKT Liao case 0x09: 2332de4fcc6SKT Liao case 0x13: 2342de4fcc6SKT Liao return true; 2352de4fcc6SKT Liao } 23692ef6f97SMatjaz Hegedic } else if (data->ic_type == 0x08 && data->product_id == 0x26) { 23792ef6f97SMatjaz Hegedic /* ASUS EeeBook X205TA */ 23892ef6f97SMatjaz Hegedic return true; 23992ef6f97SMatjaz Hegedic } 24092ef6f97SMatjaz Hegedic 24192ef6f97SMatjaz Hegedic return false; 2422de4fcc6SKT Liao } 2432de4fcc6SKT Liao 2446696777cSDuson Lin static int __elan_initialize(struct elan_tp_data *data) 2456696777cSDuson Lin { 2466696777cSDuson Lin struct i2c_client *client = data->client; 2472de4fcc6SKT Liao bool woken_up = false; 2486696777cSDuson Lin int error; 2496696777cSDuson Lin 2506696777cSDuson Lin error = data->ops->initialize(client); 2516696777cSDuson Lin if (error) { 2526696777cSDuson Lin dev_err(&client->dev, "device initialize failed: %d\n", error); 2536696777cSDuson Lin return error; 2546696777cSDuson Lin } 2556696777cSDuson Lin 2562de4fcc6SKT Liao error = elan_query_product(data); 2572de4fcc6SKT Liao if (error) 2582de4fcc6SKT Liao return error; 2592de4fcc6SKT Liao 2602de4fcc6SKT Liao /* 2612de4fcc6SKT Liao * Some ASUS devices were shipped with firmware that requires 2622de4fcc6SKT Liao * touchpads to be woken up first, before attempting to switch 2632de4fcc6SKT Liao * them into absolute reporting mode. 2642de4fcc6SKT Liao */ 2652de4fcc6SKT Liao if (elan_check_ASUS_special_fw(data)) { 2662de4fcc6SKT Liao error = data->ops->sleep_control(client, false); 2672de4fcc6SKT Liao if (error) { 2682de4fcc6SKT Liao dev_err(&client->dev, 2692de4fcc6SKT Liao "failed to wake device up: %d\n", error); 2702de4fcc6SKT Liao return error; 2712de4fcc6SKT Liao } 2722de4fcc6SKT Liao 2732de4fcc6SKT Liao msleep(200); 2742de4fcc6SKT Liao woken_up = true; 2752de4fcc6SKT Liao } 2762de4fcc6SKT Liao 2776696777cSDuson Lin data->mode |= ETP_ENABLE_ABS; 2786696777cSDuson Lin error = data->ops->set_mode(client, data->mode); 2796696777cSDuson Lin if (error) { 2806696777cSDuson Lin dev_err(&client->dev, 2816696777cSDuson Lin "failed to switch to absolute mode: %d\n", error); 2826696777cSDuson Lin return error; 2836696777cSDuson Lin } 2846696777cSDuson Lin 2852de4fcc6SKT Liao if (!woken_up) { 2866696777cSDuson Lin error = data->ops->sleep_control(client, false); 2876696777cSDuson Lin if (error) { 2886696777cSDuson Lin dev_err(&client->dev, 2896696777cSDuson Lin "failed to wake device up: %d\n", error); 2906696777cSDuson Lin return error; 2916696777cSDuson Lin } 2922de4fcc6SKT Liao } 2936696777cSDuson Lin 2946696777cSDuson Lin return 0; 2956696777cSDuson Lin } 2966696777cSDuson Lin 2976696777cSDuson Lin static int elan_initialize(struct elan_tp_data *data) 2986696777cSDuson Lin { 2996696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 3006696777cSDuson Lin int error; 3016696777cSDuson Lin 3026696777cSDuson Lin do { 3036696777cSDuson Lin error = __elan_initialize(data); 3046696777cSDuson Lin if (!error) 3056696777cSDuson Lin return 0; 3066696777cSDuson Lin 3076696777cSDuson Lin msleep(30); 3086696777cSDuson Lin } while (--repeat > 0); 3096696777cSDuson Lin 3106696777cSDuson Lin return error; 3116696777cSDuson Lin } 3126696777cSDuson Lin 3136696777cSDuson Lin static int elan_query_device_info(struct elan_tp_data *data) 3146696777cSDuson Lin { 3156696777cSDuson Lin int error; 316a2eaf299SKT Liao u16 ic_type; 3176696777cSDuson Lin 3186696777cSDuson Lin error = data->ops->get_version(data->client, false, &data->fw_version); 3196696777cSDuson Lin if (error) 3206696777cSDuson Lin return error; 3216696777cSDuson Lin 3226696777cSDuson Lin error = data->ops->get_checksum(data->client, false, 3236696777cSDuson Lin &data->fw_checksum); 3246696777cSDuson Lin if (error) 3256696777cSDuson Lin return error; 3266696777cSDuson Lin 3276696777cSDuson Lin error = data->ops->get_version(data->client, true, &data->iap_version); 3286696777cSDuson Lin if (error) 3296696777cSDuson Lin return error; 3306696777cSDuson Lin 331b9bced0eSduson error = data->ops->get_pressure_adjustment(data->client, 332b9bced0eSduson &data->pressure_adjustment); 333b9bced0eSduson if (error) 334b9bced0eSduson return error; 335b9bced0eSduson 336a2eaf299SKT Liao error = data->ops->get_pattern(data->client, &data->pattern); 337a2eaf299SKT Liao if (error) 338a2eaf299SKT Liao return error; 339a2eaf299SKT Liao 340a2eaf299SKT Liao if (data->pattern == 0x01) 341a2eaf299SKT Liao ic_type = data->ic_type; 342a2eaf299SKT Liao else 343a2eaf299SKT Liao ic_type = data->iap_version; 344a2eaf299SKT Liao 345a2eaf299SKT Liao error = elan_get_fwinfo(ic_type, &data->fw_validpage_count, 34612018ac3SDuson Lin &data->fw_signature_address); 3479d7b03f8SDaniel Drake if (error) 3489d7b03f8SDaniel Drake dev_warn(&data->client->dev, 3499d7b03f8SDaniel Drake "unexpected iap version %#04x (ic type: %#04x), firmware update will not work\n", 3509d7b03f8SDaniel Drake data->iap_version, data->ic_type); 35112018ac3SDuson Lin 3526696777cSDuson Lin return 0; 3536696777cSDuson Lin } 3546696777cSDuson Lin 3556696777cSDuson Lin static unsigned int elan_convert_resolution(u8 val) 3566696777cSDuson Lin { 3576696777cSDuson Lin /* 3586696777cSDuson Lin * (value from firmware) * 10 + 790 = dpi 3596696777cSDuson Lin * 3606696777cSDuson Lin * We also have to convert dpi to dots/mm (*10/254 to avoid floating 3616696777cSDuson Lin * point). 3626696777cSDuson Lin */ 3636696777cSDuson Lin 3646696777cSDuson Lin return ((int)(char)val * 10 + 790) * 10 / 254; 3656696777cSDuson Lin } 3666696777cSDuson Lin 3676696777cSDuson Lin static int elan_query_device_parameters(struct elan_tp_data *data) 3686696777cSDuson Lin { 3696696777cSDuson Lin unsigned int x_traces, y_traces; 3706696777cSDuson Lin u8 hw_x_res, hw_y_res; 3716696777cSDuson Lin int error; 3726696777cSDuson Lin 3736696777cSDuson Lin error = data->ops->get_max(data->client, &data->max_x, &data->max_y); 3746696777cSDuson Lin if (error) 3756696777cSDuson Lin return error; 3766696777cSDuson Lin 3776696777cSDuson Lin error = data->ops->get_num_traces(data->client, &x_traces, &y_traces); 3786696777cSDuson Lin if (error) 3796696777cSDuson Lin return error; 3806696777cSDuson Lin 3816696777cSDuson Lin data->width_x = data->max_x / x_traces; 3826696777cSDuson Lin data->width_y = data->max_y / y_traces; 3836696777cSDuson Lin 3846696777cSDuson Lin error = data->ops->get_resolution(data->client, &hw_x_res, &hw_y_res); 3856696777cSDuson Lin if (error) 3866696777cSDuson Lin return error; 3876696777cSDuson Lin 3886696777cSDuson Lin data->x_res = elan_convert_resolution(hw_x_res); 3896696777cSDuson Lin data->y_res = elan_convert_resolution(hw_y_res); 3906696777cSDuson Lin 3916696777cSDuson Lin return 0; 3926696777cSDuson Lin } 3936696777cSDuson Lin 3946696777cSDuson Lin /* 3956696777cSDuson Lin ********************************************************** 3966696777cSDuson Lin * IAP firmware updater related routines 3976696777cSDuson Lin ********************************************************** 3986696777cSDuson Lin */ 3996696777cSDuson Lin static int elan_write_fw_block(struct elan_tp_data *data, 4006696777cSDuson Lin const u8 *page, u16 checksum, int idx) 4016696777cSDuson Lin { 4026696777cSDuson Lin int retry = ETP_RETRY_COUNT; 4036696777cSDuson Lin int error; 4046696777cSDuson Lin 4056696777cSDuson Lin do { 4066696777cSDuson Lin error = data->ops->write_fw_block(data->client, 4076696777cSDuson Lin page, checksum, idx); 4086696777cSDuson Lin if (!error) 4096696777cSDuson Lin return 0; 4106696777cSDuson Lin 4116696777cSDuson Lin dev_dbg(&data->client->dev, 4126696777cSDuson Lin "IAP retrying page %d (error: %d)\n", idx, error); 4136696777cSDuson Lin } while (--retry > 0); 4146696777cSDuson Lin 4156696777cSDuson Lin return error; 4166696777cSDuson Lin } 4176696777cSDuson Lin 4186696777cSDuson Lin static int __elan_update_firmware(struct elan_tp_data *data, 4196696777cSDuson Lin const struct firmware *fw) 4206696777cSDuson Lin { 4216696777cSDuson Lin struct i2c_client *client = data->client; 4226696777cSDuson Lin struct device *dev = &client->dev; 4236696777cSDuson Lin int i, j; 4246696777cSDuson Lin int error; 4256696777cSDuson Lin u16 iap_start_addr; 4266696777cSDuson Lin u16 boot_page_count; 4276696777cSDuson Lin u16 sw_checksum = 0, fw_checksum = 0; 4286696777cSDuson Lin 4296696777cSDuson Lin error = data->ops->prepare_fw_update(client); 4306696777cSDuson Lin if (error) 4316696777cSDuson Lin return error; 4326696777cSDuson Lin 4336696777cSDuson Lin iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]); 4346696777cSDuson Lin 4356696777cSDuson Lin boot_page_count = (iap_start_addr * 2) / ETP_FW_PAGE_SIZE; 436742f452bSBenson Leung for (i = boot_page_count; i < data->fw_validpage_count; i++) { 4376696777cSDuson Lin u16 checksum = 0; 4386696777cSDuson Lin const u8 *page = &fw->data[i * ETP_FW_PAGE_SIZE]; 4396696777cSDuson Lin 4406696777cSDuson Lin for (j = 0; j < ETP_FW_PAGE_SIZE; j += 2) 4416696777cSDuson Lin checksum += ((page[j + 1] << 8) | page[j]); 4426696777cSDuson Lin 4436696777cSDuson Lin error = elan_write_fw_block(data, page, checksum, i); 4446696777cSDuson Lin if (error) { 4456696777cSDuson Lin dev_err(dev, "write page %d fail: %d\n", i, error); 4466696777cSDuson Lin return error; 4476696777cSDuson Lin } 4486696777cSDuson Lin 4496696777cSDuson Lin sw_checksum += checksum; 4506696777cSDuson Lin } 4516696777cSDuson Lin 4526696777cSDuson Lin /* Wait WDT reset and power on reset */ 4536696777cSDuson Lin msleep(600); 4546696777cSDuson Lin 4556696777cSDuson Lin error = data->ops->finish_fw_update(client, &data->fw_completion); 4566696777cSDuson Lin if (error) 4576696777cSDuson Lin return error; 4586696777cSDuson Lin 4596696777cSDuson Lin error = data->ops->get_checksum(client, true, &fw_checksum); 4606696777cSDuson Lin if (error) 4616696777cSDuson Lin return error; 4626696777cSDuson Lin 4636696777cSDuson Lin if (sw_checksum != fw_checksum) { 4646696777cSDuson Lin dev_err(dev, "checksum diff sw=[%04X], fw=[%04X]\n", 4656696777cSDuson Lin sw_checksum, fw_checksum); 4666696777cSDuson Lin return -EIO; 4676696777cSDuson Lin } 4686696777cSDuson Lin 4696696777cSDuson Lin return 0; 4706696777cSDuson Lin } 4716696777cSDuson Lin 4726696777cSDuson Lin static int elan_update_firmware(struct elan_tp_data *data, 4736696777cSDuson Lin const struct firmware *fw) 4746696777cSDuson Lin { 4756696777cSDuson Lin struct i2c_client *client = data->client; 4766696777cSDuson Lin int retval; 4776696777cSDuson Lin 4786696777cSDuson Lin dev_dbg(&client->dev, "Starting firmware update....\n"); 4796696777cSDuson Lin 4806696777cSDuson Lin disable_irq(client->irq); 4816696777cSDuson Lin data->in_fw_update = true; 4826696777cSDuson Lin 4836696777cSDuson Lin retval = __elan_update_firmware(data, fw); 4846696777cSDuson Lin if (retval) { 4856696777cSDuson Lin dev_err(&client->dev, "firmware update failed: %d\n", retval); 4866696777cSDuson Lin data->ops->iap_reset(client); 4876696777cSDuson Lin } else { 4886696777cSDuson Lin /* Reinitialize TP after fw is updated */ 4896696777cSDuson Lin elan_initialize(data); 4906696777cSDuson Lin elan_query_device_info(data); 4916696777cSDuson Lin } 4926696777cSDuson Lin 4936696777cSDuson Lin data->in_fw_update = false; 4946696777cSDuson Lin enable_irq(client->irq); 4956696777cSDuson Lin 4966696777cSDuson Lin return retval; 4976696777cSDuson Lin } 4986696777cSDuson Lin 4996696777cSDuson Lin /* 5006696777cSDuson Lin ******************************************************************* 5016696777cSDuson Lin * SYSFS attributes 5026696777cSDuson Lin ******************************************************************* 5036696777cSDuson Lin */ 5046696777cSDuson Lin static ssize_t elan_sysfs_read_fw_checksum(struct device *dev, 5056696777cSDuson Lin struct device_attribute *attr, 5066696777cSDuson Lin char *buf) 5076696777cSDuson Lin { 5086696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5096696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5106696777cSDuson Lin 5116696777cSDuson Lin return sprintf(buf, "0x%04x\n", data->fw_checksum); 5126696777cSDuson Lin } 5136696777cSDuson Lin 5146696777cSDuson Lin static ssize_t elan_sysfs_read_product_id(struct device *dev, 5156696777cSDuson Lin struct device_attribute *attr, 5166696777cSDuson Lin char *buf) 5176696777cSDuson Lin { 5186696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5196696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5206696777cSDuson Lin 5217b9f1830SCharlie Mooney return sprintf(buf, ETP_PRODUCT_ID_FORMAT_STRING "\n", 5227b9f1830SCharlie Mooney data->product_id); 5236696777cSDuson Lin } 5246696777cSDuson Lin 5256696777cSDuson Lin static ssize_t elan_sysfs_read_fw_ver(struct device *dev, 5266696777cSDuson Lin struct device_attribute *attr, 5276696777cSDuson Lin char *buf) 5286696777cSDuson Lin { 5296696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5306696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5316696777cSDuson Lin 5326696777cSDuson Lin return sprintf(buf, "%d.0\n", data->fw_version); 5336696777cSDuson Lin } 5346696777cSDuson Lin 5356696777cSDuson Lin static ssize_t elan_sysfs_read_sm_ver(struct device *dev, 5366696777cSDuson Lin struct device_attribute *attr, 5376696777cSDuson Lin char *buf) 5386696777cSDuson Lin { 5396696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5406696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5416696777cSDuson Lin 5426696777cSDuson Lin return sprintf(buf, "%d.0\n", data->sm_version); 5436696777cSDuson Lin } 5446696777cSDuson Lin 5456696777cSDuson Lin static ssize_t elan_sysfs_read_iap_ver(struct device *dev, 5466696777cSDuson Lin struct device_attribute *attr, 5476696777cSDuson Lin char *buf) 5486696777cSDuson Lin { 5496696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5506696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5516696777cSDuson Lin 5526696777cSDuson Lin return sprintf(buf, "%d.0\n", data->iap_version); 5536696777cSDuson Lin } 5546696777cSDuson Lin 5556696777cSDuson Lin static ssize_t elan_sysfs_update_fw(struct device *dev, 5566696777cSDuson Lin struct device_attribute *attr, 5576696777cSDuson Lin const char *buf, size_t count) 5586696777cSDuson Lin { 559bb03bf3fSDuson Lin struct elan_tp_data *data = dev_get_drvdata(dev); 5606696777cSDuson Lin const struct firmware *fw; 5617b9f1830SCharlie Mooney char *fw_name; 5626696777cSDuson Lin int error; 563bb03bf3fSDuson Lin const u8 *fw_signature; 564bb03bf3fSDuson Lin static const u8 signature[] = {0xAA, 0x55, 0xCC, 0x33, 0xFF, 0xFF}; 5656696777cSDuson Lin 5669d7b03f8SDaniel Drake if (data->fw_validpage_count == 0) 5679d7b03f8SDaniel Drake return -EINVAL; 5689d7b03f8SDaniel Drake 5697b9f1830SCharlie Mooney /* Look for a firmware with the product id appended. */ 5707b9f1830SCharlie Mooney fw_name = kasprintf(GFP_KERNEL, ETP_FW_NAME, data->product_id); 5717b9f1830SCharlie Mooney if (!fw_name) { 5727b9f1830SCharlie Mooney dev_err(dev, "failed to allocate memory for firmware name\n"); 5737b9f1830SCharlie Mooney return -ENOMEM; 5747b9f1830SCharlie Mooney } 5757b9f1830SCharlie Mooney 5767b9f1830SCharlie Mooney dev_info(dev, "requesting fw '%s'\n", fw_name); 5777b9f1830SCharlie Mooney error = request_firmware(&fw, fw_name, dev); 5787b9f1830SCharlie Mooney kfree(fw_name); 5796696777cSDuson Lin if (error) { 5807b9f1830SCharlie Mooney dev_err(dev, "failed to request firmware: %d\n", error); 5816696777cSDuson Lin return error; 5826696777cSDuson Lin } 5836696777cSDuson Lin 584bb03bf3fSDuson Lin /* Firmware file must match signature data */ 58512018ac3SDuson Lin fw_signature = &fw->data[data->fw_signature_address]; 586bb03bf3fSDuson Lin if (memcmp(fw_signature, signature, sizeof(signature)) != 0) { 587bb03bf3fSDuson Lin dev_err(dev, "signature mismatch (expected %*ph, got %*ph)\n", 588bb03bf3fSDuson Lin (int)sizeof(signature), signature, 589bb03bf3fSDuson Lin (int)sizeof(signature), fw_signature); 5906696777cSDuson Lin error = -EBADF; 5916696777cSDuson Lin goto out_release_fw; 5926696777cSDuson Lin } 5936696777cSDuson Lin 5946696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 5956696777cSDuson Lin if (error) 5966696777cSDuson Lin goto out_release_fw; 5976696777cSDuson Lin 5986696777cSDuson Lin error = elan_update_firmware(data, fw); 5996696777cSDuson Lin 6006696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6016696777cSDuson Lin 6026696777cSDuson Lin out_release_fw: 6036696777cSDuson Lin release_firmware(fw); 6046696777cSDuson Lin return error ?: count; 6056696777cSDuson Lin } 6066696777cSDuson Lin 6076696777cSDuson Lin static ssize_t calibrate_store(struct device *dev, 6086696777cSDuson Lin struct device_attribute *attr, 6096696777cSDuson Lin const char *buf, size_t count) 6106696777cSDuson Lin { 6116696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6126696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6136696777cSDuson Lin int tries = 20; 6146696777cSDuson Lin int retval; 6156696777cSDuson Lin int error; 61650fc7b61SBen Hutchings u8 val[ETP_CALIBRATE_MAX_LEN]; 6176696777cSDuson Lin 6186696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 6196696777cSDuson Lin if (retval) 6206696777cSDuson Lin return retval; 6216696777cSDuson Lin 6226696777cSDuson Lin disable_irq(client->irq); 6236696777cSDuson Lin 6246696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 6256696777cSDuson Lin retval = data->ops->set_mode(client, data->mode); 6266696777cSDuson Lin if (retval) { 6276696777cSDuson Lin dev_err(dev, "failed to enable calibration mode: %d\n", 6286696777cSDuson Lin retval); 6296696777cSDuson Lin goto out; 6306696777cSDuson Lin } 6316696777cSDuson Lin 6326696777cSDuson Lin retval = data->ops->calibrate(client); 6336696777cSDuson Lin if (retval) { 6346696777cSDuson Lin dev_err(dev, "failed to start calibration: %d\n", 6356696777cSDuson Lin retval); 6366696777cSDuson Lin goto out_disable_calibrate; 6376696777cSDuson Lin } 6386696777cSDuson Lin 6396696777cSDuson Lin val[0] = 0xff; 6406696777cSDuson Lin do { 6416696777cSDuson Lin /* Wait 250ms before checking if calibration has completed. */ 6426696777cSDuson Lin msleep(250); 6436696777cSDuson Lin 6446696777cSDuson Lin retval = data->ops->calibrate_result(client, val); 6456696777cSDuson Lin if (retval) 6466696777cSDuson Lin dev_err(dev, "failed to check calibration result: %d\n", 6476696777cSDuson Lin retval); 6486696777cSDuson Lin else if (val[0] == 0) 6496696777cSDuson Lin break; /* calibration done */ 6506696777cSDuson Lin 6516696777cSDuson Lin } while (--tries); 6526696777cSDuson Lin 6536696777cSDuson Lin if (tries == 0) { 6546696777cSDuson Lin dev_err(dev, "failed to calibrate. Timeout.\n"); 6556696777cSDuson Lin retval = -ETIMEDOUT; 6566696777cSDuson Lin } 6576696777cSDuson Lin 6586696777cSDuson Lin out_disable_calibrate: 6596696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 6606696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 6616696777cSDuson Lin if (error) { 6626696777cSDuson Lin dev_err(dev, "failed to disable calibration mode: %d\n", 6636696777cSDuson Lin error); 6646696777cSDuson Lin if (!retval) 6656696777cSDuson Lin retval = error; 6666696777cSDuson Lin } 6676696777cSDuson Lin out: 6686696777cSDuson Lin enable_irq(client->irq); 6696696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6706696777cSDuson Lin return retval ?: count; 6716696777cSDuson Lin } 6726696777cSDuson Lin 6736696777cSDuson Lin static ssize_t elan_sysfs_read_mode(struct device *dev, 6746696777cSDuson Lin struct device_attribute *attr, 6756696777cSDuson Lin char *buf) 6766696777cSDuson Lin { 6776696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6786696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6796696777cSDuson Lin int error; 6806696777cSDuson Lin enum tp_mode mode; 6816696777cSDuson Lin 6826696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 6836696777cSDuson Lin if (error) 6846696777cSDuson Lin return error; 6856696777cSDuson Lin 6866696777cSDuson Lin error = data->ops->iap_get_mode(data->client, &mode); 6876696777cSDuson Lin 6886696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6896696777cSDuson Lin 6906696777cSDuson Lin if (error) 6916696777cSDuson Lin return error; 6926696777cSDuson Lin 6936696777cSDuson Lin return sprintf(buf, "%d\n", (int)mode); 6946696777cSDuson Lin } 6956696777cSDuson Lin 6966696777cSDuson Lin static DEVICE_ATTR(product_id, S_IRUGO, elan_sysfs_read_product_id, NULL); 6976696777cSDuson Lin static DEVICE_ATTR(firmware_version, S_IRUGO, elan_sysfs_read_fw_ver, NULL); 6986696777cSDuson Lin static DEVICE_ATTR(sample_version, S_IRUGO, elan_sysfs_read_sm_ver, NULL); 6996696777cSDuson Lin static DEVICE_ATTR(iap_version, S_IRUGO, elan_sysfs_read_iap_ver, NULL); 7006696777cSDuson Lin static DEVICE_ATTR(fw_checksum, S_IRUGO, elan_sysfs_read_fw_checksum, NULL); 7016696777cSDuson Lin static DEVICE_ATTR(mode, S_IRUGO, elan_sysfs_read_mode, NULL); 7026696777cSDuson Lin static DEVICE_ATTR(update_fw, S_IWUSR, NULL, elan_sysfs_update_fw); 7036696777cSDuson Lin 7046696777cSDuson Lin static DEVICE_ATTR_WO(calibrate); 7056696777cSDuson Lin 7066696777cSDuson Lin static struct attribute *elan_sysfs_entries[] = { 7076696777cSDuson Lin &dev_attr_product_id.attr, 7086696777cSDuson Lin &dev_attr_firmware_version.attr, 7096696777cSDuson Lin &dev_attr_sample_version.attr, 7106696777cSDuson Lin &dev_attr_iap_version.attr, 7116696777cSDuson Lin &dev_attr_fw_checksum.attr, 7126696777cSDuson Lin &dev_attr_calibrate.attr, 7136696777cSDuson Lin &dev_attr_mode.attr, 7146696777cSDuson Lin &dev_attr_update_fw.attr, 7156696777cSDuson Lin NULL, 7166696777cSDuson Lin }; 7176696777cSDuson Lin 7186696777cSDuson Lin static const struct attribute_group elan_sysfs_group = { 7196696777cSDuson Lin .attrs = elan_sysfs_entries, 7206696777cSDuson Lin }; 7216696777cSDuson Lin 7226696777cSDuson Lin static ssize_t acquire_store(struct device *dev, struct device_attribute *attr, 7236696777cSDuson Lin const char *buf, size_t count) 7246696777cSDuson Lin { 7256696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7266696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7276696777cSDuson Lin int error; 7286696777cSDuson Lin int retval; 7296696777cSDuson Lin 7306696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 7316696777cSDuson Lin if (retval) 7326696777cSDuson Lin return retval; 7336696777cSDuson Lin 7346696777cSDuson Lin disable_irq(client->irq); 7356696777cSDuson Lin 7366696777cSDuson Lin data->baseline_ready = false; 7376696777cSDuson Lin 7386696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 7396696777cSDuson Lin retval = data->ops->set_mode(data->client, data->mode); 7406696777cSDuson Lin if (retval) { 7416696777cSDuson Lin dev_err(dev, "Failed to enable calibration mode to get baseline: %d\n", 7426696777cSDuson Lin retval); 7436696777cSDuson Lin goto out; 7446696777cSDuson Lin } 7456696777cSDuson Lin 7466696777cSDuson Lin msleep(250); 7476696777cSDuson Lin 7486696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, true, 7496696777cSDuson Lin &data->max_baseline); 7506696777cSDuson Lin if (retval) { 7516696777cSDuson Lin dev_err(dev, "Failed to read max baseline form device: %d\n", 7526696777cSDuson Lin retval); 7536696777cSDuson Lin goto out_disable_calibrate; 7546696777cSDuson Lin } 7556696777cSDuson Lin 7566696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, false, 7576696777cSDuson Lin &data->min_baseline); 7586696777cSDuson Lin if (retval) { 7596696777cSDuson Lin dev_err(dev, "Failed to read min baseline form device: %d\n", 7606696777cSDuson Lin retval); 7616696777cSDuson Lin goto out_disable_calibrate; 7626696777cSDuson Lin } 7636696777cSDuson Lin 7646696777cSDuson Lin data->baseline_ready = true; 7656696777cSDuson Lin 7666696777cSDuson Lin out_disable_calibrate: 7676696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 7686696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 7696696777cSDuson Lin if (error) { 7706696777cSDuson Lin dev_err(dev, "Failed to disable calibration mode after acquiring baseline: %d\n", 7716696777cSDuson Lin error); 7726696777cSDuson Lin if (!retval) 7736696777cSDuson Lin retval = error; 7746696777cSDuson Lin } 7756696777cSDuson Lin out: 7766696777cSDuson Lin enable_irq(client->irq); 7776696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7786696777cSDuson Lin return retval ?: count; 7796696777cSDuson Lin } 7806696777cSDuson Lin 7816696777cSDuson Lin static ssize_t min_show(struct device *dev, 7826696777cSDuson Lin struct device_attribute *attr, char *buf) 7836696777cSDuson Lin { 7846696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7856696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7866696777cSDuson Lin int retval; 7876696777cSDuson Lin 7886696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 7896696777cSDuson Lin if (retval) 7906696777cSDuson Lin return retval; 7916696777cSDuson Lin 7926696777cSDuson Lin if (!data->baseline_ready) { 7936696777cSDuson Lin retval = -ENODATA; 7946696777cSDuson Lin goto out; 7956696777cSDuson Lin } 7966696777cSDuson Lin 7976696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->min_baseline); 7986696777cSDuson Lin 7996696777cSDuson Lin out: 8006696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8016696777cSDuson Lin return retval; 8026696777cSDuson Lin } 8036696777cSDuson Lin 8046696777cSDuson Lin static ssize_t max_show(struct device *dev, 8056696777cSDuson Lin struct device_attribute *attr, char *buf) 8066696777cSDuson Lin { 8076696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 8086696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 8096696777cSDuson Lin int retval; 8106696777cSDuson Lin 8116696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8126696777cSDuson Lin if (retval) 8136696777cSDuson Lin return retval; 8146696777cSDuson Lin 8156696777cSDuson Lin if (!data->baseline_ready) { 8166696777cSDuson Lin retval = -ENODATA; 8176696777cSDuson Lin goto out; 8186696777cSDuson Lin } 8196696777cSDuson Lin 8206696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->max_baseline); 8216696777cSDuson Lin 8226696777cSDuson Lin out: 8236696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8246696777cSDuson Lin return retval; 8256696777cSDuson Lin } 8266696777cSDuson Lin 8276696777cSDuson Lin 8286696777cSDuson Lin static DEVICE_ATTR_WO(acquire); 8296696777cSDuson Lin static DEVICE_ATTR_RO(min); 8306696777cSDuson Lin static DEVICE_ATTR_RO(max); 8316696777cSDuson Lin 8326696777cSDuson Lin static struct attribute *elan_baseline_sysfs_entries[] = { 8336696777cSDuson Lin &dev_attr_acquire.attr, 8346696777cSDuson Lin &dev_attr_min.attr, 8356696777cSDuson Lin &dev_attr_max.attr, 8366696777cSDuson Lin NULL, 8376696777cSDuson Lin }; 8386696777cSDuson Lin 8396696777cSDuson Lin static const struct attribute_group elan_baseline_sysfs_group = { 8406696777cSDuson Lin .name = "baseline", 8416696777cSDuson Lin .attrs = elan_baseline_sysfs_entries, 8426696777cSDuson Lin }; 8436696777cSDuson Lin 8446696777cSDuson Lin static const struct attribute_group *elan_sysfs_groups[] = { 8456696777cSDuson Lin &elan_sysfs_group, 8466696777cSDuson Lin &elan_baseline_sysfs_group, 8476696777cSDuson Lin NULL 8486696777cSDuson Lin }; 8496696777cSDuson Lin 8506696777cSDuson Lin /* 8516696777cSDuson Lin ****************************************************************** 8526696777cSDuson Lin * Elan isr functions 8536696777cSDuson Lin ****************************************************************** 8546696777cSDuson Lin */ 8556696777cSDuson Lin static void elan_report_contact(struct elan_tp_data *data, 8566696777cSDuson Lin int contact_num, bool contact_valid, 857539c4b88Sduson u8 *finger_data) 8586696777cSDuson Lin { 8596696777cSDuson Lin struct input_dev *input = data->input; 8606696777cSDuson Lin unsigned int pos_x, pos_y; 8616696777cSDuson Lin unsigned int pressure, mk_x, mk_y; 862b9bced0eSduson unsigned int area_x, area_y, major, minor; 863b9bced0eSduson unsigned int scaled_pressure; 8646696777cSDuson Lin 8656696777cSDuson Lin if (contact_valid) { 8666696777cSDuson Lin pos_x = ((finger_data[0] & 0xf0) << 4) | 8676696777cSDuson Lin finger_data[1]; 8686696777cSDuson Lin pos_y = ((finger_data[0] & 0x0f) << 8) | 8696696777cSDuson Lin finger_data[2]; 8706696777cSDuson Lin mk_x = (finger_data[3] & 0x0f); 8716696777cSDuson Lin mk_y = (finger_data[3] >> 4); 8726696777cSDuson Lin pressure = finger_data[4]; 8736696777cSDuson Lin 8746696777cSDuson Lin if (pos_x > data->max_x || pos_y > data->max_y) { 8756696777cSDuson Lin dev_dbg(input->dev.parent, 8766696777cSDuson Lin "[%d] x=%d y=%d over max (%d, %d)", 8776696777cSDuson Lin contact_num, pos_x, pos_y, 8786696777cSDuson Lin data->max_x, data->max_y); 8796696777cSDuson Lin return; 8806696777cSDuson Lin } 8816696777cSDuson Lin 8826696777cSDuson Lin /* 8836696777cSDuson Lin * To avoid treating large finger as palm, let's reduce the 8846696777cSDuson Lin * width x and y per trace. 8856696777cSDuson Lin */ 8866696777cSDuson Lin area_x = mk_x * (data->width_x - ETP_FWIDTH_REDUCE); 8876696777cSDuson Lin area_y = mk_y * (data->width_y - ETP_FWIDTH_REDUCE); 8886696777cSDuson Lin 8896696777cSDuson Lin major = max(area_x, area_y); 8906696777cSDuson Lin minor = min(area_x, area_y); 8916696777cSDuson Lin 892b9bced0eSduson scaled_pressure = pressure + data->pressure_adjustment; 893b9bced0eSduson 894b9bced0eSduson if (scaled_pressure > ETP_MAX_PRESSURE) 895b9bced0eSduson scaled_pressure = ETP_MAX_PRESSURE; 8966696777cSDuson Lin 8976696777cSDuson Lin input_mt_slot(input, contact_num); 8986696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 8996696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_X, pos_x); 9006696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_Y, data->max_y - pos_y); 901539c4b88Sduson input_report_abs(input, ABS_MT_PRESSURE, scaled_pressure); 9026696777cSDuson Lin input_report_abs(input, ABS_TOOL_WIDTH, mk_x); 9036696777cSDuson Lin input_report_abs(input, ABS_MT_TOUCH_MAJOR, major); 9046696777cSDuson Lin input_report_abs(input, ABS_MT_TOUCH_MINOR, minor); 9056696777cSDuson Lin } else { 9066696777cSDuson Lin input_mt_slot(input, contact_num); 9076696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, false); 9086696777cSDuson Lin } 9096696777cSDuson Lin } 9106696777cSDuson Lin 9116696777cSDuson Lin static void elan_report_absolute(struct elan_tp_data *data, u8 *packet) 9126696777cSDuson Lin { 9136696777cSDuson Lin struct input_dev *input = data->input; 9146696777cSDuson Lin u8 *finger_data = &packet[ETP_FINGER_DATA_OFFSET]; 9156696777cSDuson Lin int i; 9166696777cSDuson Lin u8 tp_info = packet[ETP_TOUCH_INFO_OFFSET]; 917090ad325SDuson Lin u8 hover_info = packet[ETP_HOVER_INFO_OFFSET]; 918090ad325SDuson Lin bool contact_valid, hover_event; 9196696777cSDuson Lin 920090ad325SDuson Lin hover_event = hover_info & 0x40; 9216696777cSDuson Lin for (i = 0; i < ETP_MAX_FINGERS; i++) { 9226696777cSDuson Lin contact_valid = tp_info & (1U << (3 + i)); 923539c4b88Sduson elan_report_contact(data, i, contact_valid, finger_data); 9246696777cSDuson Lin 9256696777cSDuson Lin if (contact_valid) 9266696777cSDuson Lin finger_data += ETP_FINGER_DATA_LEN; 9276696777cSDuson Lin } 9286696777cSDuson Lin 9296696777cSDuson Lin input_report_key(input, BTN_LEFT, tp_info & 0x01); 93099136881SKT Liao input_report_key(input, BTN_RIGHT, tp_info & 0x02); 931539c4b88Sduson input_report_abs(input, ABS_DISTANCE, hover_event != 0); 9326696777cSDuson Lin input_mt_report_pointer_emulation(input, true); 9336696777cSDuson Lin input_sync(input); 9346696777cSDuson Lin } 9356696777cSDuson Lin 936559b3df7SBenjamin Tissoires static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report) 937559b3df7SBenjamin Tissoires { 938559b3df7SBenjamin Tissoires struct input_dev *input = data->tp_input; 939559b3df7SBenjamin Tissoires u8 *packet = &report[ETP_REPORT_ID_OFFSET + 1]; 940559b3df7SBenjamin Tissoires int x, y; 941559b3df7SBenjamin Tissoires 942559b3df7SBenjamin Tissoires if (!data->tp_input) { 943559b3df7SBenjamin Tissoires dev_warn_once(&data->client->dev, 944559b3df7SBenjamin Tissoires "received a trackpoint report while no trackpoint device has been created. Please report upstream.\n"); 945559b3df7SBenjamin Tissoires return; 946559b3df7SBenjamin Tissoires } 947559b3df7SBenjamin Tissoires 948559b3df7SBenjamin Tissoires input_report_key(input, BTN_LEFT, packet[0] & 0x01); 949559b3df7SBenjamin Tissoires input_report_key(input, BTN_RIGHT, packet[0] & 0x02); 950559b3df7SBenjamin Tissoires input_report_key(input, BTN_MIDDLE, packet[0] & 0x04); 951559b3df7SBenjamin Tissoires 952559b3df7SBenjamin Tissoires if ((packet[3] & 0x0F) == 0x06) { 953559b3df7SBenjamin Tissoires x = packet[4] - (int)((packet[1] ^ 0x80) << 1); 954559b3df7SBenjamin Tissoires y = (int)((packet[2] ^ 0x80) << 1) - packet[5]; 955559b3df7SBenjamin Tissoires 956559b3df7SBenjamin Tissoires input_report_rel(input, REL_X, x); 957559b3df7SBenjamin Tissoires input_report_rel(input, REL_Y, y); 958559b3df7SBenjamin Tissoires } 959559b3df7SBenjamin Tissoires 960559b3df7SBenjamin Tissoires input_sync(input); 961559b3df7SBenjamin Tissoires } 962559b3df7SBenjamin Tissoires 9636696777cSDuson Lin static irqreturn_t elan_isr(int irq, void *dev_id) 9646696777cSDuson Lin { 9656696777cSDuson Lin struct elan_tp_data *data = dev_id; 9666696777cSDuson Lin struct device *dev = &data->client->dev; 9676696777cSDuson Lin int error; 9686696777cSDuson Lin u8 report[ETP_MAX_REPORT_LEN]; 9696696777cSDuson Lin 9706696777cSDuson Lin /* 9716696777cSDuson Lin * When device is connected to i2c bus, when all IAP page writes 9726696777cSDuson Lin * complete, the driver will receive interrupt and must read 9736696777cSDuson Lin * 0000 to confirm that IAP is finished. 9746696777cSDuson Lin */ 9756696777cSDuson Lin if (data->in_fw_update) { 9766696777cSDuson Lin complete(&data->fw_completion); 9776696777cSDuson Lin goto out; 9786696777cSDuson Lin } 9796696777cSDuson Lin 9806696777cSDuson Lin error = data->ops->get_report(data->client, report); 9816696777cSDuson Lin if (error) 9826696777cSDuson Lin goto out; 9836696777cSDuson Lin 984145b11d1SRavi Chandra Sadineni pm_wakeup_event(dev, 0); 985145b11d1SRavi Chandra Sadineni 986559b3df7SBenjamin Tissoires switch (report[ETP_REPORT_ID_OFFSET]) { 987559b3df7SBenjamin Tissoires case ETP_REPORT_ID: 988559b3df7SBenjamin Tissoires elan_report_absolute(data, report); 989559b3df7SBenjamin Tissoires break; 990559b3df7SBenjamin Tissoires case ETP_TP_REPORT_ID: 991559b3df7SBenjamin Tissoires elan_report_trackpoint(data, report); 992559b3df7SBenjamin Tissoires break; 993559b3df7SBenjamin Tissoires default: 9946696777cSDuson Lin dev_err(dev, "invalid report id data (%x)\n", 9956696777cSDuson Lin report[ETP_REPORT_ID_OFFSET]); 996559b3df7SBenjamin Tissoires } 9976696777cSDuson Lin 9986696777cSDuson Lin out: 9996696777cSDuson Lin return IRQ_HANDLED; 10006696777cSDuson Lin } 10016696777cSDuson Lin 10026696777cSDuson Lin /* 10036696777cSDuson Lin ****************************************************************** 10046696777cSDuson Lin * Elan initialization functions 10056696777cSDuson Lin ****************************************************************** 10066696777cSDuson Lin */ 1007559b3df7SBenjamin Tissoires 1008559b3df7SBenjamin Tissoires static int elan_setup_trackpoint_input_device(struct elan_tp_data *data) 1009559b3df7SBenjamin Tissoires { 1010559b3df7SBenjamin Tissoires struct device *dev = &data->client->dev; 1011559b3df7SBenjamin Tissoires struct input_dev *input; 1012559b3df7SBenjamin Tissoires 1013559b3df7SBenjamin Tissoires input = devm_input_allocate_device(dev); 1014559b3df7SBenjamin Tissoires if (!input) 1015559b3df7SBenjamin Tissoires return -ENOMEM; 1016559b3df7SBenjamin Tissoires 1017559b3df7SBenjamin Tissoires input->name = "Elan TrackPoint"; 1018559b3df7SBenjamin Tissoires input->id.bustype = BUS_I2C; 1019559b3df7SBenjamin Tissoires input->id.vendor = ELAN_VENDOR_ID; 1020559b3df7SBenjamin Tissoires input->id.product = data->product_id; 1021559b3df7SBenjamin Tissoires input_set_drvdata(input, data); 1022559b3df7SBenjamin Tissoires 1023559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_X); 1024559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_Y); 1025559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_LEFT); 1026559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_RIGHT); 1027559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_MIDDLE); 1028559b3df7SBenjamin Tissoires 1029559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTER, input->propbit); 1030559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTING_STICK, input->propbit); 1031559b3df7SBenjamin Tissoires 1032559b3df7SBenjamin Tissoires data->tp_input = input; 1033559b3df7SBenjamin Tissoires 1034559b3df7SBenjamin Tissoires return 0; 1035559b3df7SBenjamin Tissoires } 1036559b3df7SBenjamin Tissoires 10376696777cSDuson Lin static int elan_setup_input_device(struct elan_tp_data *data) 10386696777cSDuson Lin { 10396696777cSDuson Lin struct device *dev = &data->client->dev; 10406696777cSDuson Lin struct input_dev *input; 10416696777cSDuson Lin unsigned int max_width = max(data->width_x, data->width_y); 10426696777cSDuson Lin unsigned int min_width = min(data->width_x, data->width_y); 10436696777cSDuson Lin int error; 10446696777cSDuson Lin 10456696777cSDuson Lin input = devm_input_allocate_device(dev); 10466696777cSDuson Lin if (!input) 10476696777cSDuson Lin return -ENOMEM; 10486696777cSDuson Lin 10496696777cSDuson Lin input->name = "Elan Touchpad"; 10506696777cSDuson Lin input->id.bustype = BUS_I2C; 10513eab4588SCharlie Mooney input->id.vendor = ELAN_VENDOR_ID; 10523eab4588SCharlie Mooney input->id.product = data->product_id; 10536696777cSDuson Lin input_set_drvdata(input, data); 10546696777cSDuson Lin 10556696777cSDuson Lin error = input_mt_init_slots(input, ETP_MAX_FINGERS, 10566696777cSDuson Lin INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 10576696777cSDuson Lin if (error) { 10586696777cSDuson Lin dev_err(dev, "failed to initialize MT slots: %d\n", error); 10596696777cSDuson Lin return error; 10606696777cSDuson Lin } 10616696777cSDuson Lin 10626696777cSDuson Lin __set_bit(EV_ABS, input->evbit); 10636696777cSDuson Lin __set_bit(INPUT_PROP_POINTER, input->propbit); 106499136881SKT Liao if (data->clickpad) 10656696777cSDuson Lin __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 106699136881SKT Liao else 106799136881SKT Liao __set_bit(BTN_RIGHT, input->keybit); 10686696777cSDuson Lin __set_bit(BTN_LEFT, input->keybit); 10696696777cSDuson Lin 10706696777cSDuson Lin /* Set up ST parameters */ 10716696777cSDuson Lin input_set_abs_params(input, ABS_X, 0, data->max_x, 0, 0); 10726696777cSDuson Lin input_set_abs_params(input, ABS_Y, 0, data->max_y, 0, 0); 10736696777cSDuson Lin input_abs_set_res(input, ABS_X, data->x_res); 10746696777cSDuson Lin input_abs_set_res(input, ABS_Y, data->y_res); 10756696777cSDuson Lin input_set_abs_params(input, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0); 10766696777cSDuson Lin input_set_abs_params(input, ABS_TOOL_WIDTH, 0, ETP_FINGER_WIDTH, 0, 0); 1077539c4b88Sduson input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 10786696777cSDuson Lin 10796696777cSDuson Lin /* And MT parameters */ 10806696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); 10816696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); 10826696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_X, data->x_res); 10836696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_Y, data->y_res); 10846696777cSDuson Lin input_set_abs_params(input, ABS_MT_PRESSURE, 0, 10856696777cSDuson Lin ETP_MAX_PRESSURE, 0, 0); 10866696777cSDuson Lin input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 10876696777cSDuson Lin ETP_FINGER_WIDTH * max_width, 0, 0); 10886696777cSDuson Lin input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 10896696777cSDuson Lin ETP_FINGER_WIDTH * min_width, 0, 0); 10906696777cSDuson Lin 10916696777cSDuson Lin data->input = input; 10926696777cSDuson Lin 10936696777cSDuson Lin return 0; 10946696777cSDuson Lin } 10956696777cSDuson Lin 10966696777cSDuson Lin static void elan_disable_regulator(void *_data) 10976696777cSDuson Lin { 10986696777cSDuson Lin struct elan_tp_data *data = _data; 10996696777cSDuson Lin 11006696777cSDuson Lin regulator_disable(data->vcc); 11016696777cSDuson Lin } 11026696777cSDuson Lin 11036696777cSDuson Lin static void elan_remove_sysfs_groups(void *_data) 11046696777cSDuson Lin { 11056696777cSDuson Lin struct elan_tp_data *data = _data; 11066696777cSDuson Lin 11076696777cSDuson Lin sysfs_remove_groups(&data->client->dev.kobj, elan_sysfs_groups); 11086696777cSDuson Lin } 11096696777cSDuson Lin 11106696777cSDuson Lin static int elan_probe(struct i2c_client *client, 11116696777cSDuson Lin const struct i2c_device_id *dev_id) 11126696777cSDuson Lin { 11136696777cSDuson Lin const struct elan_transport_ops *transport_ops; 11146696777cSDuson Lin struct device *dev = &client->dev; 11156696777cSDuson Lin struct elan_tp_data *data; 11166696777cSDuson Lin unsigned long irqflags; 11176696777cSDuson Lin int error; 11186696777cSDuson Lin 11196696777cSDuson Lin if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_I2C) && 11206696777cSDuson Lin i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 11216696777cSDuson Lin transport_ops = &elan_i2c_ops; 11226696777cSDuson Lin } else if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) && 11236696777cSDuson Lin i2c_check_functionality(client->adapter, 11246696777cSDuson Lin I2C_FUNC_SMBUS_BYTE_DATA | 11256696777cSDuson Lin I2C_FUNC_SMBUS_BLOCK_DATA | 11266696777cSDuson Lin I2C_FUNC_SMBUS_I2C_BLOCK)) { 11276696777cSDuson Lin transport_ops = &elan_smbus_ops; 11286696777cSDuson Lin } else { 11296696777cSDuson Lin dev_err(dev, "not a supported I2C/SMBus adapter\n"); 11306696777cSDuson Lin return -EIO; 11316696777cSDuson Lin } 11326696777cSDuson Lin 1133ad56814fSGuenter Roeck data = devm_kzalloc(dev, sizeof(struct elan_tp_data), GFP_KERNEL); 11346696777cSDuson Lin if (!data) 11356696777cSDuson Lin return -ENOMEM; 11366696777cSDuson Lin 11376696777cSDuson Lin i2c_set_clientdata(client, data); 11386696777cSDuson Lin 11396696777cSDuson Lin data->ops = transport_ops; 11406696777cSDuson Lin data->client = client; 11416696777cSDuson Lin init_completion(&data->fw_completion); 11426696777cSDuson Lin mutex_init(&data->sysfs_mutex); 11436696777cSDuson Lin 1144ad56814fSGuenter Roeck data->vcc = devm_regulator_get(dev, "vcc"); 11456696777cSDuson Lin if (IS_ERR(data->vcc)) { 11466696777cSDuson Lin error = PTR_ERR(data->vcc); 11476696777cSDuson Lin if (error != -EPROBE_DEFER) 1148ad56814fSGuenter Roeck dev_err(dev, "Failed to get 'vcc' regulator: %d\n", 11496696777cSDuson Lin error); 11506696777cSDuson Lin return error; 11516696777cSDuson Lin } 11526696777cSDuson Lin 11536696777cSDuson Lin error = regulator_enable(data->vcc); 11546696777cSDuson Lin if (error) { 1155ad56814fSGuenter Roeck dev_err(dev, "Failed to enable regulator: %d\n", error); 11566696777cSDuson Lin return error; 11576696777cSDuson Lin } 11586696777cSDuson Lin 1159ad56814fSGuenter Roeck error = devm_add_action(dev, elan_disable_regulator, data); 11606696777cSDuson Lin if (error) { 11616696777cSDuson Lin regulator_disable(data->vcc); 1162ad56814fSGuenter Roeck dev_err(dev, "Failed to add disable regulator action: %d\n", 11636696777cSDuson Lin error); 11646696777cSDuson Lin return error; 11656696777cSDuson Lin } 11666696777cSDuson Lin 1167c5928551SDmitry Torokhov /* Make sure there is something at this address */ 1168c5928551SDmitry Torokhov error = i2c_smbus_read_byte(client); 1169c5928551SDmitry Torokhov if (error < 0) { 1170c5928551SDmitry Torokhov dev_dbg(&client->dev, "nothing at this address: %d\n", error); 1171c5928551SDmitry Torokhov return -ENXIO; 1172c5928551SDmitry Torokhov } 1173c5928551SDmitry Torokhov 11746696777cSDuson Lin /* Initialize the touchpad. */ 11756696777cSDuson Lin error = elan_initialize(data); 11766696777cSDuson Lin if (error) 11776696777cSDuson Lin return error; 11786696777cSDuson Lin 11796696777cSDuson Lin error = elan_query_device_info(data); 11806696777cSDuson Lin if (error) 11816696777cSDuson Lin return error; 11826696777cSDuson Lin 11836696777cSDuson Lin error = elan_query_device_parameters(data); 11846696777cSDuson Lin if (error) 11856696777cSDuson Lin return error; 11866696777cSDuson Lin 1187ad56814fSGuenter Roeck dev_info(dev, 118839a0d75aSBenjamin Tissoires "Elan Touchpad: Module ID: 0x%04x, Firmware: 0x%04x, Sample: 0x%04x, IAP: 0x%04x\n", 11896696777cSDuson Lin data->product_id, 11906696777cSDuson Lin data->fw_version, 11916696777cSDuson Lin data->sm_version, 119239a0d75aSBenjamin Tissoires data->iap_version); 119339a0d75aSBenjamin Tissoires 1194ad56814fSGuenter Roeck dev_dbg(dev, 119539a0d75aSBenjamin Tissoires "Elan Touchpad Extra Information:\n" 119639a0d75aSBenjamin Tissoires " Max ABS X,Y: %d,%d\n" 119739a0d75aSBenjamin Tissoires " Width X,Y: %d,%d\n" 1198a2eaf299SKT Liao " Resolution X,Y: %d,%d (dots/mm)\n" 1199a2eaf299SKT Liao " ic type: 0x%x\n" 1200a2eaf299SKT Liao " info pattern: 0x%x\n", 12016696777cSDuson Lin data->max_x, data->max_y, 12026696777cSDuson Lin data->width_x, data->width_y, 1203a2eaf299SKT Liao data->x_res, data->y_res, 1204a2eaf299SKT Liao data->ic_type, data->pattern); 12056696777cSDuson Lin 12066696777cSDuson Lin /* Set up input device properties based on queried parameters. */ 12076696777cSDuson Lin error = elan_setup_input_device(data); 12086696777cSDuson Lin if (error) 12096696777cSDuson Lin return error; 12106696777cSDuson Lin 1211559b3df7SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,trackpoint")) { 1212559b3df7SBenjamin Tissoires error = elan_setup_trackpoint_input_device(data); 1213559b3df7SBenjamin Tissoires if (error) 1214559b3df7SBenjamin Tissoires return error; 1215559b3df7SBenjamin Tissoires } 1216559b3df7SBenjamin Tissoires 12176696777cSDuson Lin /* 1218a4b0a58bSDmitry Torokhov * Platform code (ACPI, DTS) should normally set up interrupt 1219a4b0a58bSDmitry Torokhov * for us, but in case it did not let's fall back to using falling 1220a4b0a58bSDmitry Torokhov * edge to be compatible with older Chromebooks. 12216696777cSDuson Lin */ 1222a4b0a58bSDmitry Torokhov irqflags = irq_get_trigger_type(client->irq); 1223a4b0a58bSDmitry Torokhov if (!irqflags) 1224a4b0a58bSDmitry Torokhov irqflags = IRQF_TRIGGER_FALLING; 12256696777cSDuson Lin 1226ad56814fSGuenter Roeck error = devm_request_threaded_irq(dev, client->irq, NULL, elan_isr, 12276696777cSDuson Lin irqflags | IRQF_ONESHOT, 12286696777cSDuson Lin client->name, data); 12296696777cSDuson Lin if (error) { 1230ad56814fSGuenter Roeck dev_err(dev, "cannot register irq=%d\n", client->irq); 12316696777cSDuson Lin return error; 12326696777cSDuson Lin } 12336696777cSDuson Lin 1234ad56814fSGuenter Roeck error = sysfs_create_groups(&dev->kobj, elan_sysfs_groups); 12356696777cSDuson Lin if (error) { 1236ad56814fSGuenter Roeck dev_err(dev, "failed to create sysfs attributes: %d\n", error); 12376696777cSDuson Lin return error; 12386696777cSDuson Lin } 12396696777cSDuson Lin 1240ad56814fSGuenter Roeck error = devm_add_action(dev, elan_remove_sysfs_groups, data); 12416696777cSDuson Lin if (error) { 12426696777cSDuson Lin elan_remove_sysfs_groups(data); 1243ad56814fSGuenter Roeck dev_err(dev, "Failed to add sysfs cleanup action: %d\n", 12446696777cSDuson Lin error); 12456696777cSDuson Lin return error; 12466696777cSDuson Lin } 12476696777cSDuson Lin 12486696777cSDuson Lin error = input_register_device(data->input); 12496696777cSDuson Lin if (error) { 1250ad56814fSGuenter Roeck dev_err(dev, "failed to register input device: %d\n", error); 12516696777cSDuson Lin return error; 12526696777cSDuson Lin } 12536696777cSDuson Lin 1254559b3df7SBenjamin Tissoires if (data->tp_input) { 1255559b3df7SBenjamin Tissoires error = input_register_device(data->tp_input); 1256559b3df7SBenjamin Tissoires if (error) { 1257559b3df7SBenjamin Tissoires dev_err(&client->dev, 1258559b3df7SBenjamin Tissoires "failed to register TrackPoint input device: %d\n", 1259559b3df7SBenjamin Tissoires error); 1260559b3df7SBenjamin Tissoires return error; 1261559b3df7SBenjamin Tissoires } 1262559b3df7SBenjamin Tissoires } 1263559b3df7SBenjamin Tissoires 12646696777cSDuson Lin /* 12656696777cSDuson Lin * Systems using device tree should set up wakeup via DTS, 12666696777cSDuson Lin * the rest will configure device as wakeup source by default. 12676696777cSDuson Lin */ 1268ad56814fSGuenter Roeck if (!dev->of_node) 1269ad56814fSGuenter Roeck device_init_wakeup(dev, true); 12706696777cSDuson Lin 12716696777cSDuson Lin return 0; 12726696777cSDuson Lin } 12736696777cSDuson Lin 12746696777cSDuson Lin static int __maybe_unused elan_suspend(struct device *dev) 12756696777cSDuson Lin { 12766696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 12776696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 12786696777cSDuson Lin int ret; 12796696777cSDuson Lin 12806696777cSDuson Lin /* 12816696777cSDuson Lin * We are taking the mutex to make sure sysfs operations are 12826696777cSDuson Lin * complete before we attempt to bring the device into low[er] 12836696777cSDuson Lin * power mode. 12846696777cSDuson Lin */ 12856696777cSDuson Lin ret = mutex_lock_interruptible(&data->sysfs_mutex); 12866696777cSDuson Lin if (ret) 12876696777cSDuson Lin return ret; 12886696777cSDuson Lin 12896696777cSDuson Lin disable_irq(client->irq); 12906696777cSDuson Lin 12916696777cSDuson Lin if (device_may_wakeup(dev)) { 12926696777cSDuson Lin ret = elan_sleep(data); 12936696777cSDuson Lin /* Enable wake from IRQ */ 12946696777cSDuson Lin data->irq_wake = (enable_irq_wake(client->irq) == 0); 12956696777cSDuson Lin } else { 12966696777cSDuson Lin ret = elan_disable_power(data); 12976696777cSDuson Lin } 12986696777cSDuson Lin 12996696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 13006696777cSDuson Lin return ret; 13016696777cSDuson Lin } 13026696777cSDuson Lin 13036696777cSDuson Lin static int __maybe_unused elan_resume(struct device *dev) 13046696777cSDuson Lin { 13056696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 13066696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 13076696777cSDuson Lin int error; 13086696777cSDuson Lin 13096696777cSDuson Lin if (device_may_wakeup(dev) && data->irq_wake) { 13106696777cSDuson Lin disable_irq_wake(client->irq); 13116696777cSDuson Lin data->irq_wake = false; 13126696777cSDuson Lin } 13136696777cSDuson Lin 13146696777cSDuson Lin error = elan_enable_power(data); 1315b3beed7fSDuson Lin if (error) { 13166696777cSDuson Lin dev_err(dev, "power up when resuming failed: %d\n", error); 1317b3beed7fSDuson Lin goto err; 1318b3beed7fSDuson Lin } 13196696777cSDuson Lin 13206696777cSDuson Lin error = elan_initialize(data); 13216696777cSDuson Lin if (error) 13226696777cSDuson Lin dev_err(dev, "initialize when resuming failed: %d\n", error); 13236696777cSDuson Lin 1324b3beed7fSDuson Lin err: 13256696777cSDuson Lin enable_irq(data->client->irq); 1326b3beed7fSDuson Lin return error; 13276696777cSDuson Lin } 13286696777cSDuson Lin 13296696777cSDuson Lin static SIMPLE_DEV_PM_OPS(elan_pm_ops, elan_suspend, elan_resume); 13306696777cSDuson Lin 13316696777cSDuson Lin static const struct i2c_device_id elan_id[] = { 13326696777cSDuson Lin { DRIVER_NAME, 0 }, 13336696777cSDuson Lin { }, 13346696777cSDuson Lin }; 13356696777cSDuson Lin MODULE_DEVICE_TABLE(i2c, elan_id); 13366696777cSDuson Lin 13376696777cSDuson Lin #ifdef CONFIG_ACPI 13386696777cSDuson Lin static const struct acpi_device_id elan_acpi_id[] = { 13396696777cSDuson Lin { "ELAN0000", 0 }, 1340534fcb3bSMichele Curti { "ELAN0100", 0 }, 13416ccfe64cSBenjamin Tissoires { "ELAN0600", 0 }, 1342e154ab69SVincent Batts { "ELAN0601", 0 }, 13431d2226e4SKT Liao { "ELAN0602", 0 }, 1344738c06d0SKT Liao { "ELAN0603", 0 }, 1345738c06d0SKT Liao { "ELAN0604", 0 }, 1346722c5ac7SIHARA Hiroka { "ELAN0605", 0 }, 1347738c06d0SKT Liao { "ELAN0606", 0 }, 1348738c06d0SKT Liao { "ELAN0607", 0 }, 13491874064eSKai-Heng Feng { "ELAN0608", 0 }, 135076988690SKT Liao { "ELAN0609", 0 }, 135176988690SKT Liao { "ELAN060B", 0 }, 1352cdea6a30SKai-Heng Feng { "ELAN060C", 0 }, 1353738c06d0SKT Liao { "ELAN060F", 0 }, 1354738c06d0SKT Liao { "ELAN0610", 0 }, 135557a95b41SKai-Heng Feng { "ELAN0611", 0 }, 1356e6e7e9cdSJohannes Wienke { "ELAN0612", 0 }, 1357738c06d0SKT Liao { "ELAN0615", 0 }, 1358738c06d0SKT Liao { "ELAN0616", 0 }, 13597ad222b3SMauro Ciancio { "ELAN0617", 0 }, 13608938fc7bSAlexandr Savca { "ELAN0618", 0 }, 1361738c06d0SKT Liao { "ELAN0619", 0 }, 1362738c06d0SKT Liao { "ELAN061A", 0 }, 1363738c06d0SKT Liao { "ELAN061B", 0 }, 136413c1c5e4SMikhail Nikiforov { "ELAN061C", 0 }, 1365938f4500SDonald Shanty III { "ELAN061D", 0 }, 1366ad33429cSNoah Westervelt { "ELAN061E", 0 }, 1367738c06d0SKT Liao { "ELAN061F", 0 }, 13683ed64da3SPatrick Gaskin { "ELAN0620", 0 }, 1369bf87ade0SAdam Wong { "ELAN0621", 0 }, 13706f88a643SKT Liao { "ELAN0622", 0 }, 1371738c06d0SKT Liao { "ELAN0623", 0 }, 1372738c06d0SKT Liao { "ELAN0624", 0 }, 1373738c06d0SKT Liao { "ELAN0625", 0 }, 1374738c06d0SKT Liao { "ELAN0626", 0 }, 1375738c06d0SKT Liao { "ELAN0627", 0 }, 1376738c06d0SKT Liao { "ELAN0628", 0 }, 1377738c06d0SKT Liao { "ELAN0629", 0 }, 1378738c06d0SKT Liao { "ELAN062A", 0 }, 1379738c06d0SKT Liao { "ELAN062B", 0 }, 1380738c06d0SKT Liao { "ELAN062C", 0 }, 1381738c06d0SKT Liao { "ELAN062D", 0 }, 1382738c06d0SKT Liao { "ELAN0631", 0 }, 1383738c06d0SKT Liao { "ELAN0632", 0 }, 13844aeca98cSJoão Paulo Rechi Vita { "ELAN1000", 0 }, 13856696777cSDuson Lin { } 13866696777cSDuson Lin }; 13876696777cSDuson Lin MODULE_DEVICE_TABLE(acpi, elan_acpi_id); 13886696777cSDuson Lin #endif 13896696777cSDuson Lin 13906696777cSDuson Lin #ifdef CONFIG_OF 13916696777cSDuson Lin static const struct of_device_id elan_of_match[] = { 13926696777cSDuson Lin { .compatible = "elan,ekth3000" }, 13936696777cSDuson Lin { /* sentinel */ } 13946696777cSDuson Lin }; 13956696777cSDuson Lin MODULE_DEVICE_TABLE(of, elan_of_match); 13966696777cSDuson Lin #endif 13976696777cSDuson Lin 13986696777cSDuson Lin static struct i2c_driver elan_driver = { 13996696777cSDuson Lin .driver = { 14006696777cSDuson Lin .name = DRIVER_NAME, 14016696777cSDuson Lin .pm = &elan_pm_ops, 14026696777cSDuson Lin .acpi_match_table = ACPI_PTR(elan_acpi_id), 14036696777cSDuson Lin .of_match_table = of_match_ptr(elan_of_match), 140471d0f562SDmitry Torokhov .probe_type = PROBE_PREFER_ASYNCHRONOUS, 14056696777cSDuson Lin }, 14066696777cSDuson Lin .probe = elan_probe, 14076696777cSDuson Lin .id_table = elan_id, 14086696777cSDuson Lin }; 14096696777cSDuson Lin 14106696777cSDuson Lin module_i2c_driver(elan_driver); 14116696777cSDuson Lin 14126696777cSDuson Lin MODULE_AUTHOR("Duson Lin <dusonlin@emc.com.tw>"); 14136696777cSDuson Lin MODULE_DESCRIPTION("Elan I2C/SMBus Touchpad driver"); 14146696777cSDuson Lin MODULE_LICENSE("GPL"); 1415