1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 26696777cSDuson Lin /* 36696777cSDuson Lin * Elan I2C/SMBus Touchpad driver 46696777cSDuson Lin * 56696777cSDuson Lin * Copyright (c) 2013 ELAN Microelectronics Corp. 66696777cSDuson Lin * 76696777cSDuson Lin * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw> 82de4fcc6SKT Liao * Author: KT Liao <kt.liao@emc.com.tw> 9a2eaf299SKT Liao * Version: 1.6.3 106696777cSDuson Lin * 116696777cSDuson Lin * Based on cyapa driver: 126696777cSDuson Lin * copyright (c) 2011-2012 Cypress Semiconductor, Inc. 136696777cSDuson Lin * copyright (c) 2011-2012 Google, Inc. 146696777cSDuson Lin * 156696777cSDuson Lin * Trademarks are the property of their respective owners. 166696777cSDuson Lin */ 176696777cSDuson Lin 186696777cSDuson Lin #include <linux/acpi.h> 196696777cSDuson Lin #include <linux/delay.h> 206696777cSDuson Lin #include <linux/device.h> 216696777cSDuson Lin #include <linux/firmware.h> 226696777cSDuson Lin #include <linux/i2c.h> 236696777cSDuson Lin #include <linux/init.h> 246696777cSDuson Lin #include <linux/input/mt.h> 256696777cSDuson Lin #include <linux/interrupt.h> 26a4b0a58bSDmitry Torokhov #include <linux/irq.h> 276696777cSDuson Lin #include <linux/module.h> 286696777cSDuson Lin #include <linux/slab.h> 296696777cSDuson Lin #include <linux/kernel.h> 306696777cSDuson Lin #include <linux/sched.h> 316696777cSDuson Lin #include <linux/input.h> 326696777cSDuson Lin #include <linux/uaccess.h> 336696777cSDuson Lin #include <linux/jiffies.h> 346696777cSDuson Lin #include <linux/completion.h> 356696777cSDuson Lin #include <linux/of.h> 36559b3df7SBenjamin Tissoires #include <linux/property.h> 370828c100SJeffrey Hugo #include <linux/input/elan-i2c-ids.h> 386696777cSDuson Lin #include <linux/regulator/consumer.h> 396696777cSDuson Lin #include <asm/unaligned.h> 406696777cSDuson Lin 416696777cSDuson Lin #include "elan_i2c.h" 426696777cSDuson Lin 436696777cSDuson Lin #define DRIVER_NAME "elan_i2c" 443eab4588SCharlie Mooney #define ELAN_VENDOR_ID 0x04f3 456696777cSDuson Lin #define ETP_MAX_PRESSURE 255 466696777cSDuson Lin #define ETP_FWIDTH_REDUCE 90 476696777cSDuson Lin #define ETP_FINGER_WIDTH 15 486696777cSDuson Lin #define ETP_RETRY_COUNT 3 496696777cSDuson Lin 506696777cSDuson Lin #define ETP_MAX_FINGERS 5 516696777cSDuson Lin #define ETP_FINGER_DATA_LEN 5 526696777cSDuson Lin #define ETP_REPORT_ID 0x5D 5304d5ce62SJingle Wu #define ETP_REPORT_ID2 0x60 /* High precision report */ 54559b3df7SBenjamin Tissoires #define ETP_TP_REPORT_ID 0x5E 556696777cSDuson Lin #define ETP_REPORT_ID_OFFSET 2 566696777cSDuson Lin #define ETP_TOUCH_INFO_OFFSET 3 576696777cSDuson Lin #define ETP_FINGER_DATA_OFFSET 4 58090ad325SDuson Lin #define ETP_HOVER_INFO_OFFSET 30 5904d5ce62SJingle Wu #define ETP_MK_DATA_OFFSET 33 /* For high precision reports */ 6004d5ce62SJingle Wu #define ETP_MAX_REPORT_LEN 39 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; 9004d5ce62SJingle Wu unsigned int report_features; 9104d5ce62SJingle Wu unsigned int report_len; 92b9bced0eSduson int pressure_adjustment; 936696777cSDuson Lin u8 mode; 94a2eaf299SKT Liao u16 ic_type; 95742f452bSBenson Leung u16 fw_validpage_count; 96059d6c2dSJingle Wu u16 fw_page_size; 97059d6c2dSJingle Wu u32 fw_signature_address; 986696777cSDuson Lin 996696777cSDuson Lin bool irq_wake; 1006696777cSDuson Lin 1016696777cSDuson Lin u8 min_baseline; 1026696777cSDuson Lin u8 max_baseline; 1036696777cSDuson Lin bool baseline_ready; 10499136881SKT Liao u8 clickpad; 105140a7952SBenjamin Tissoires bool middle_button; 1066696777cSDuson Lin }; 1076696777cSDuson Lin 108bfd9b92bSJingle Wu static int elan_get_fwinfo(u16 ic_type, u8 iap_version, u16 *validpage_count, 109059d6c2dSJingle Wu u32 *signature_address, u16 *page_size) 11012018ac3SDuson Lin { 111a2eaf299SKT Liao switch (ic_type) { 11222ef28b4Sduson case 0x00: 11322ef28b4Sduson case 0x06: 114534fcb3bSMichele Curti case 0x08: 115742f452bSBenson Leung *validpage_count = 512; 116534fcb3bSMichele Curti break; 117c84333a1SDuson Lin case 0x03: 11822ef28b4Sduson case 0x07: 11922ef28b4Sduson case 0x09: 12022ef28b4Sduson case 0x0A: 12122ef28b4Sduson case 0x0B: 12222ef28b4Sduson case 0x0C: 123742f452bSBenson Leung *validpage_count = 768; 12412018ac3SDuson Lin break; 12512018ac3SDuson Lin case 0x0D: 126742f452bSBenson Leung *validpage_count = 896; 12712018ac3SDuson Lin break; 12822ef28b4Sduson case 0x0E: 12922ef28b4Sduson *validpage_count = 640; 13022ef28b4Sduson break; 131a2eaf299SKT Liao case 0x10: 132a2eaf299SKT Liao *validpage_count = 1024; 133a2eaf299SKT Liao break; 1348d73ec74SJingle Wu case 0x11: 1358d73ec74SJingle Wu *validpage_count = 1280; 1368d73ec74SJingle Wu break; 1378d73ec74SJingle Wu case 0x13: 1388d73ec74SJingle Wu *validpage_count = 2048; 1398d73ec74SJingle Wu break; 1408d73ec74SJingle Wu case 0x14: 141873a3a14SJingle Wu case 0x15: 1428d73ec74SJingle Wu *validpage_count = 1024; 1438d73ec74SJingle Wu break; 14412018ac3SDuson Lin default: 14512018ac3SDuson Lin /* unknown ic type clear value */ 146742f452bSBenson Leung *validpage_count = 0; 14712018ac3SDuson Lin *signature_address = 0; 148059d6c2dSJingle Wu *page_size = 0; 14912018ac3SDuson Lin return -ENXIO; 15012018ac3SDuson Lin } 15112018ac3SDuson Lin 15212018ac3SDuson Lin *signature_address = 153742f452bSBenson Leung (*validpage_count * ETP_FW_PAGE_SIZE) - ETP_FW_SIGNATURE_SIZE; 15412018ac3SDuson Lin 155873a3a14SJingle Wu if ((ic_type == 0x14 || ic_type == 0x15) && iap_version >= 2) { 1568d73ec74SJingle Wu *validpage_count /= 8; 1578d73ec74SJingle Wu *page_size = ETP_FW_PAGE_SIZE_512; 1588d73ec74SJingle Wu } else if (ic_type >= 0x0D && iap_version >= 1) { 159bfd9b92bSJingle Wu *validpage_count /= 2; 160bfd9b92bSJingle Wu *page_size = ETP_FW_PAGE_SIZE_128; 161bfd9b92bSJingle Wu } else { 162059d6c2dSJingle Wu *page_size = ETP_FW_PAGE_SIZE; 163bfd9b92bSJingle Wu } 164059d6c2dSJingle Wu 16512018ac3SDuson Lin return 0; 16612018ac3SDuson Lin } 16712018ac3SDuson Lin 1686696777cSDuson Lin static int elan_enable_power(struct elan_tp_data *data) 1696696777cSDuson Lin { 1706696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1716696777cSDuson Lin int error; 1726696777cSDuson Lin 1736696777cSDuson Lin error = regulator_enable(data->vcc); 1746696777cSDuson Lin if (error) { 1756696777cSDuson Lin dev_err(&data->client->dev, 176b3beed7fSDuson Lin "failed to enable regulator: %d\n", error); 1776696777cSDuson Lin return error; 1786696777cSDuson Lin } 1796696777cSDuson Lin 1806696777cSDuson Lin do { 1816696777cSDuson Lin error = data->ops->power_control(data->client, true); 1826696777cSDuson Lin if (error >= 0) 1836696777cSDuson Lin return 0; 1846696777cSDuson Lin 1856696777cSDuson Lin msleep(30); 1866696777cSDuson Lin } while (--repeat > 0); 1876696777cSDuson Lin 188b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to enable power: %d\n", error); 1896696777cSDuson Lin return error; 1906696777cSDuson Lin } 1916696777cSDuson Lin 1926696777cSDuson Lin static int elan_disable_power(struct elan_tp_data *data) 1936696777cSDuson Lin { 1946696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1956696777cSDuson Lin int error; 1966696777cSDuson Lin 1976696777cSDuson Lin do { 1986696777cSDuson Lin error = data->ops->power_control(data->client, false); 1996696777cSDuson Lin if (!error) { 2006696777cSDuson Lin error = regulator_disable(data->vcc); 2016696777cSDuson Lin if (error) { 2026696777cSDuson Lin dev_err(&data->client->dev, 203b3beed7fSDuson Lin "failed to disable regulator: %d\n", 2046696777cSDuson Lin error); 2056696777cSDuson Lin /* Attempt to power the chip back up */ 2066696777cSDuson Lin data->ops->power_control(data->client, true); 2076696777cSDuson Lin break; 2086696777cSDuson Lin } 2096696777cSDuson Lin 2106696777cSDuson Lin return 0; 2116696777cSDuson Lin } 2126696777cSDuson Lin 2136696777cSDuson Lin msleep(30); 2146696777cSDuson Lin } while (--repeat > 0); 2156696777cSDuson Lin 216b3beed7fSDuson Lin dev_err(&data->client->dev, "failed to disable power: %d\n", error); 2176696777cSDuson Lin return error; 2186696777cSDuson Lin } 2196696777cSDuson Lin 2206696777cSDuson Lin static int elan_sleep(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 = data->ops->sleep_control(data->client, true); 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 2362de4fcc6SKT Liao static int elan_query_product(struct elan_tp_data *data) 2372de4fcc6SKT Liao { 2382de4fcc6SKT Liao int error; 2392de4fcc6SKT Liao 2402de4fcc6SKT Liao error = data->ops->get_product_id(data->client, &data->product_id); 2412de4fcc6SKT Liao if (error) 2422de4fcc6SKT Liao return error; 2432de4fcc6SKT Liao 2443d712af6SDmitry Torokhov error = data->ops->get_pattern(data->client, &data->pattern); 2453d712af6SDmitry Torokhov if (error) 2463d712af6SDmitry Torokhov return error; 2473d712af6SDmitry Torokhov 2483d712af6SDmitry Torokhov error = data->ops->get_sm_version(data->client, data->pattern, 2493d712af6SDmitry Torokhov &data->ic_type, &data->sm_version, 2503d712af6SDmitry Torokhov &data->clickpad); 2512de4fcc6SKT Liao if (error) 2522de4fcc6SKT Liao return error; 2532de4fcc6SKT Liao 2542de4fcc6SKT Liao return 0; 2552de4fcc6SKT Liao } 2562de4fcc6SKT Liao 2572de4fcc6SKT Liao static int elan_check_ASUS_special_fw(struct elan_tp_data *data) 2582de4fcc6SKT Liao { 25992ef6f97SMatjaz Hegedic if (data->ic_type == 0x0E) { 2602de4fcc6SKT Liao switch (data->product_id) { 2612de4fcc6SKT Liao case 0x05 ... 0x07: 2622de4fcc6SKT Liao case 0x09: 2632de4fcc6SKT Liao case 0x13: 2642de4fcc6SKT Liao return true; 2652de4fcc6SKT Liao } 26692ef6f97SMatjaz Hegedic } else if (data->ic_type == 0x08 && data->product_id == 0x26) { 26792ef6f97SMatjaz Hegedic /* ASUS EeeBook X205TA */ 26892ef6f97SMatjaz Hegedic return true; 26992ef6f97SMatjaz Hegedic } 27092ef6f97SMatjaz Hegedic 27192ef6f97SMatjaz Hegedic return false; 2722de4fcc6SKT Liao } 2732de4fcc6SKT Liao 2746696777cSDuson Lin static int __elan_initialize(struct elan_tp_data *data) 2756696777cSDuson Lin { 2766696777cSDuson Lin struct i2c_client *client = data->client; 2772de4fcc6SKT Liao bool woken_up = false; 2786696777cSDuson Lin int error; 2796696777cSDuson Lin 2806696777cSDuson Lin error = data->ops->initialize(client); 2816696777cSDuson Lin if (error) { 2826696777cSDuson Lin dev_err(&client->dev, "device initialize failed: %d\n", error); 2836696777cSDuson Lin return error; 2846696777cSDuson Lin } 2856696777cSDuson Lin 2862de4fcc6SKT Liao error = elan_query_product(data); 2872de4fcc6SKT Liao if (error) 2882de4fcc6SKT Liao return error; 2892de4fcc6SKT Liao 2902de4fcc6SKT Liao /* 2912de4fcc6SKT Liao * Some ASUS devices were shipped with firmware that requires 2922de4fcc6SKT Liao * touchpads to be woken up first, before attempting to switch 2932de4fcc6SKT Liao * them into absolute reporting mode. 2942de4fcc6SKT Liao */ 2952de4fcc6SKT Liao if (elan_check_ASUS_special_fw(data)) { 2962de4fcc6SKT Liao error = data->ops->sleep_control(client, false); 2972de4fcc6SKT Liao if (error) { 2982de4fcc6SKT Liao dev_err(&client->dev, 2992de4fcc6SKT Liao "failed to wake device up: %d\n", error); 3002de4fcc6SKT Liao return error; 3012de4fcc6SKT Liao } 3022de4fcc6SKT Liao 3032de4fcc6SKT Liao msleep(200); 3042de4fcc6SKT Liao woken_up = true; 3052de4fcc6SKT Liao } 3062de4fcc6SKT Liao 3076696777cSDuson Lin data->mode |= ETP_ENABLE_ABS; 3086696777cSDuson Lin error = data->ops->set_mode(client, data->mode); 3096696777cSDuson Lin if (error) { 3106696777cSDuson Lin dev_err(&client->dev, 3116696777cSDuson Lin "failed to switch to absolute mode: %d\n", error); 3126696777cSDuson Lin return error; 3136696777cSDuson Lin } 3146696777cSDuson Lin 3152de4fcc6SKT Liao if (!woken_up) { 3166696777cSDuson Lin error = data->ops->sleep_control(client, false); 3176696777cSDuson Lin if (error) { 3186696777cSDuson Lin dev_err(&client->dev, 3196696777cSDuson Lin "failed to wake device up: %d\n", error); 3206696777cSDuson Lin return error; 3216696777cSDuson Lin } 3222de4fcc6SKT Liao } 3236696777cSDuson Lin 3246696777cSDuson Lin return 0; 3256696777cSDuson Lin } 3266696777cSDuson Lin 3276696777cSDuson Lin static int elan_initialize(struct elan_tp_data *data) 3286696777cSDuson Lin { 3296696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 3306696777cSDuson Lin int error; 3316696777cSDuson Lin 3326696777cSDuson Lin do { 3336696777cSDuson Lin error = __elan_initialize(data); 3346696777cSDuson Lin if (!error) 3356696777cSDuson Lin return 0; 3366696777cSDuson Lin 3376696777cSDuson Lin msleep(30); 3386696777cSDuson Lin } while (--repeat > 0); 3396696777cSDuson Lin 3406696777cSDuson Lin return error; 3416696777cSDuson Lin } 3426696777cSDuson Lin 3436696777cSDuson Lin static int elan_query_device_info(struct elan_tp_data *data) 3446696777cSDuson Lin { 3456696777cSDuson Lin int error; 3466696777cSDuson Lin 3473d712af6SDmitry Torokhov error = data->ops->get_version(data->client, data->pattern, false, 3483d712af6SDmitry Torokhov &data->fw_version); 3496696777cSDuson Lin if (error) 3506696777cSDuson Lin return error; 3516696777cSDuson Lin 3526696777cSDuson Lin error = data->ops->get_checksum(data->client, false, 3536696777cSDuson Lin &data->fw_checksum); 3546696777cSDuson Lin if (error) 3556696777cSDuson Lin return error; 3566696777cSDuson Lin 3573d712af6SDmitry Torokhov error = data->ops->get_version(data->client, data->pattern, 3583d712af6SDmitry Torokhov true, &data->iap_version); 3596696777cSDuson Lin if (error) 3606696777cSDuson Lin return error; 3616696777cSDuson Lin 362b9bced0eSduson error = data->ops->get_pressure_adjustment(data->client, 363b9bced0eSduson &data->pressure_adjustment); 364b9bced0eSduson if (error) 365b9bced0eSduson return error; 366b9bced0eSduson 36704d5ce62SJingle Wu error = data->ops->get_report_features(data->client, data->pattern, 36804d5ce62SJingle Wu &data->report_features, 36904d5ce62SJingle Wu &data->report_len); 370a2eaf299SKT Liao if (error) 371a2eaf299SKT Liao return error; 372a2eaf299SKT Liao 373bfd9b92bSJingle Wu error = elan_get_fwinfo(data->ic_type, data->iap_version, 374bfd9b92bSJingle Wu &data->fw_validpage_count, 375059d6c2dSJingle Wu &data->fw_signature_address, 376059d6c2dSJingle Wu &data->fw_page_size); 3779d7b03f8SDaniel Drake if (error) 3789d7b03f8SDaniel Drake dev_warn(&data->client->dev, 3799d7b03f8SDaniel Drake "unexpected iap version %#04x (ic type: %#04x), firmware update will not work\n", 3809d7b03f8SDaniel Drake data->iap_version, data->ic_type); 38112018ac3SDuson Lin 3826696777cSDuson Lin return 0; 3836696777cSDuson Lin } 3846696777cSDuson Lin 38504d5ce62SJingle Wu static unsigned int elan_convert_resolution(u8 val, u8 pattern) 3866696777cSDuson Lin { 3876696777cSDuson Lin /* 38804d5ce62SJingle Wu * pattern <= 0x01: 3896696777cSDuson Lin * (value from firmware) * 10 + 790 = dpi 39004d5ce62SJingle Wu * else 39104d5ce62SJingle Wu * ((value from firmware) + 3) * 100 = dpi 39204d5ce62SJingle Wu */ 39304d5ce62SJingle Wu int res = pattern <= 0x01 ? 39404d5ce62SJingle Wu (int)(char)val * 10 + 790 : ((int)(char)val + 3) * 100; 39504d5ce62SJingle Wu /* 3966696777cSDuson Lin * We also have to convert dpi to dots/mm (*10/254 to avoid floating 3976696777cSDuson Lin * point). 3986696777cSDuson Lin */ 39904d5ce62SJingle Wu return res * 10 / 254; 4006696777cSDuson Lin } 4016696777cSDuson Lin 4026696777cSDuson Lin static int elan_query_device_parameters(struct elan_tp_data *data) 4036696777cSDuson Lin { 404e3a9a129SBenjamin Tissoires struct i2c_client *client = data->client; 4056696777cSDuson Lin unsigned int x_traces, y_traces; 406e3a9a129SBenjamin Tissoires u32 x_mm, y_mm; 4076696777cSDuson Lin u8 hw_x_res, hw_y_res; 4086696777cSDuson Lin int error; 4096696777cSDuson Lin 410e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 411e3a9a129SBenjamin Tissoires "touchscreen-size-x", &data->max_x) || 412e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 413e3a9a129SBenjamin Tissoires "touchscreen-size-y", &data->max_y)) { 414e3a9a129SBenjamin Tissoires error = data->ops->get_max(data->client, 415e3a9a129SBenjamin Tissoires &data->max_x, 416e3a9a129SBenjamin Tissoires &data->max_y); 4176696777cSDuson Lin if (error) 4186696777cSDuson Lin return error; 419e3a9a129SBenjamin Tissoires } else { 420e3a9a129SBenjamin Tissoires /* size is the maximum + 1 */ 421e3a9a129SBenjamin Tissoires --data->max_x; 422e3a9a129SBenjamin Tissoires --data->max_y; 423e3a9a129SBenjamin Tissoires } 4246696777cSDuson Lin 425e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 426e3a9a129SBenjamin Tissoires "elan,x_traces", 427e3a9a129SBenjamin Tissoires &x_traces) || 428e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 429e3a9a129SBenjamin Tissoires "elan,y_traces", 430e3a9a129SBenjamin Tissoires &y_traces)) { 431e3a9a129SBenjamin Tissoires error = data->ops->get_num_traces(data->client, 432e3a9a129SBenjamin Tissoires &x_traces, &y_traces); 4336696777cSDuson Lin if (error) 4346696777cSDuson Lin return error; 435e3a9a129SBenjamin Tissoires } 4366696777cSDuson Lin data->width_x = data->max_x / x_traces; 4376696777cSDuson Lin data->width_y = data->max_y / y_traces; 4386696777cSDuson Lin 439e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 440e3a9a129SBenjamin Tissoires "touchscreen-x-mm", &x_mm) || 441e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 442e3a9a129SBenjamin Tissoires "touchscreen-y-mm", &y_mm)) { 443e3a9a129SBenjamin Tissoires error = data->ops->get_resolution(data->client, 444e3a9a129SBenjamin Tissoires &hw_x_res, &hw_y_res); 4456696777cSDuson Lin if (error) 4466696777cSDuson Lin return error; 4476696777cSDuson Lin 44804d5ce62SJingle Wu data->x_res = elan_convert_resolution(hw_x_res, data->pattern); 44904d5ce62SJingle Wu data->y_res = elan_convert_resolution(hw_y_res, data->pattern); 450e3a9a129SBenjamin Tissoires } else { 451e3a9a129SBenjamin Tissoires data->x_res = (data->max_x + 1) / x_mm; 452e3a9a129SBenjamin Tissoires data->y_res = (data->max_y + 1) / y_mm; 453e3a9a129SBenjamin Tissoires } 454e3a9a129SBenjamin Tissoires 455e3a9a129SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,clickpad")) 456e3a9a129SBenjamin Tissoires data->clickpad = 1; 4576696777cSDuson Lin 458140a7952SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,middle-button")) 459140a7952SBenjamin Tissoires data->middle_button = true; 460140a7952SBenjamin Tissoires 4616696777cSDuson Lin return 0; 4626696777cSDuson Lin } 4636696777cSDuson Lin 4646696777cSDuson Lin /* 4656696777cSDuson Lin ********************************************************** 4666696777cSDuson Lin * IAP firmware updater related routines 4676696777cSDuson Lin ********************************************************** 4686696777cSDuson Lin */ 469059d6c2dSJingle Wu static int elan_write_fw_block(struct elan_tp_data *data, u16 page_size, 4706696777cSDuson Lin const u8 *page, u16 checksum, int idx) 4716696777cSDuson Lin { 4726696777cSDuson Lin int retry = ETP_RETRY_COUNT; 4736696777cSDuson Lin int error; 4746696777cSDuson Lin 4756696777cSDuson Lin do { 476059d6c2dSJingle Wu error = data->ops->write_fw_block(data->client, page_size, 4776696777cSDuson Lin page, checksum, idx); 4786696777cSDuson Lin if (!error) 4796696777cSDuson Lin return 0; 4806696777cSDuson Lin 4816696777cSDuson Lin dev_dbg(&data->client->dev, 4826696777cSDuson Lin "IAP retrying page %d (error: %d)\n", idx, error); 4836696777cSDuson Lin } while (--retry > 0); 4846696777cSDuson Lin 4856696777cSDuson Lin return error; 4866696777cSDuson Lin } 4876696777cSDuson Lin 4886696777cSDuson Lin static int __elan_update_firmware(struct elan_tp_data *data, 4896696777cSDuson Lin const struct firmware *fw) 4906696777cSDuson Lin { 4916696777cSDuson Lin struct i2c_client *client = data->client; 4926696777cSDuson Lin struct device *dev = &client->dev; 4936696777cSDuson Lin int i, j; 4946696777cSDuson Lin int error; 4956696777cSDuson Lin u16 iap_start_addr; 4966696777cSDuson Lin u16 boot_page_count; 4976696777cSDuson Lin u16 sw_checksum = 0, fw_checksum = 0; 4986696777cSDuson Lin 499bfd9b92bSJingle Wu error = data->ops->prepare_fw_update(client, data->ic_type, 500bfd9b92bSJingle Wu data->iap_version); 5016696777cSDuson Lin if (error) 5026696777cSDuson Lin return error; 5036696777cSDuson Lin 5046696777cSDuson Lin iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]); 5056696777cSDuson Lin 506059d6c2dSJingle Wu boot_page_count = (iap_start_addr * 2) / data->fw_page_size; 507742f452bSBenson Leung for (i = boot_page_count; i < data->fw_validpage_count; i++) { 5086696777cSDuson Lin u16 checksum = 0; 509059d6c2dSJingle Wu const u8 *page = &fw->data[i * data->fw_page_size]; 5106696777cSDuson Lin 511059d6c2dSJingle Wu for (j = 0; j < data->fw_page_size; j += 2) 5126696777cSDuson Lin checksum += ((page[j + 1] << 8) | page[j]); 5136696777cSDuson Lin 514059d6c2dSJingle Wu error = elan_write_fw_block(data, data->fw_page_size, 515059d6c2dSJingle Wu page, checksum, i); 5166696777cSDuson Lin if (error) { 5176696777cSDuson Lin dev_err(dev, "write page %d fail: %d\n", i, error); 5186696777cSDuson Lin return error; 5196696777cSDuson Lin } 5206696777cSDuson Lin 5216696777cSDuson Lin sw_checksum += checksum; 5226696777cSDuson Lin } 5236696777cSDuson Lin 5246696777cSDuson Lin /* Wait WDT reset and power on reset */ 5256696777cSDuson Lin msleep(600); 5266696777cSDuson Lin 5276696777cSDuson Lin error = data->ops->finish_fw_update(client, &data->fw_completion); 5286696777cSDuson Lin if (error) 5296696777cSDuson Lin return error; 5306696777cSDuson Lin 5316696777cSDuson Lin error = data->ops->get_checksum(client, true, &fw_checksum); 5326696777cSDuson Lin if (error) 5336696777cSDuson Lin return error; 5346696777cSDuson Lin 5356696777cSDuson Lin if (sw_checksum != fw_checksum) { 5366696777cSDuson Lin dev_err(dev, "checksum diff sw=[%04X], fw=[%04X]\n", 5376696777cSDuson Lin sw_checksum, fw_checksum); 5386696777cSDuson Lin return -EIO; 5396696777cSDuson Lin } 5406696777cSDuson Lin 5416696777cSDuson Lin return 0; 5426696777cSDuson Lin } 5436696777cSDuson Lin 5446696777cSDuson Lin static int elan_update_firmware(struct elan_tp_data *data, 5456696777cSDuson Lin const struct firmware *fw) 5466696777cSDuson Lin { 5476696777cSDuson Lin struct i2c_client *client = data->client; 5486696777cSDuson Lin int retval; 5496696777cSDuson Lin 5506696777cSDuson Lin dev_dbg(&client->dev, "Starting firmware update....\n"); 5516696777cSDuson Lin 5526696777cSDuson Lin disable_irq(client->irq); 5536696777cSDuson Lin data->in_fw_update = true; 5546696777cSDuson Lin 5556696777cSDuson Lin retval = __elan_update_firmware(data, fw); 5566696777cSDuson Lin if (retval) { 5576696777cSDuson Lin dev_err(&client->dev, "firmware update failed: %d\n", retval); 5586696777cSDuson Lin data->ops->iap_reset(client); 5596696777cSDuson Lin } else { 5606696777cSDuson Lin /* Reinitialize TP after fw is updated */ 5616696777cSDuson Lin elan_initialize(data); 5626696777cSDuson Lin elan_query_device_info(data); 5636696777cSDuson Lin } 5646696777cSDuson Lin 5656696777cSDuson Lin data->in_fw_update = false; 5666696777cSDuson Lin enable_irq(client->irq); 5676696777cSDuson Lin 5686696777cSDuson Lin return retval; 5696696777cSDuson Lin } 5706696777cSDuson Lin 5716696777cSDuson Lin /* 5726696777cSDuson Lin ******************************************************************* 5736696777cSDuson Lin * SYSFS attributes 5746696777cSDuson Lin ******************************************************************* 5756696777cSDuson Lin */ 5766696777cSDuson Lin static ssize_t elan_sysfs_read_fw_checksum(struct device *dev, 5776696777cSDuson Lin struct device_attribute *attr, 5786696777cSDuson Lin char *buf) 5796696777cSDuson Lin { 5806696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5816696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5826696777cSDuson Lin 5836696777cSDuson Lin return sprintf(buf, "0x%04x\n", data->fw_checksum); 5846696777cSDuson Lin } 5856696777cSDuson Lin 5866696777cSDuson Lin static ssize_t elan_sysfs_read_product_id(struct device *dev, 5876696777cSDuson Lin struct device_attribute *attr, 5886696777cSDuson Lin char *buf) 5896696777cSDuson Lin { 5906696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5916696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5926696777cSDuson Lin 5937b9f1830SCharlie Mooney return sprintf(buf, ETP_PRODUCT_ID_FORMAT_STRING "\n", 5947b9f1830SCharlie Mooney data->product_id); 5956696777cSDuson Lin } 5966696777cSDuson Lin 5976696777cSDuson Lin static ssize_t elan_sysfs_read_fw_ver(struct device *dev, 5986696777cSDuson Lin struct device_attribute *attr, 5996696777cSDuson Lin char *buf) 6006696777cSDuson Lin { 6016696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6026696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6036696777cSDuson Lin 6046696777cSDuson Lin return sprintf(buf, "%d.0\n", data->fw_version); 6056696777cSDuson Lin } 6066696777cSDuson Lin 6076696777cSDuson Lin static ssize_t elan_sysfs_read_sm_ver(struct device *dev, 6086696777cSDuson Lin struct device_attribute *attr, 6096696777cSDuson Lin char *buf) 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 6146696777cSDuson Lin return sprintf(buf, "%d.0\n", data->sm_version); 6156696777cSDuson Lin } 6166696777cSDuson Lin 6176696777cSDuson Lin static ssize_t elan_sysfs_read_iap_ver(struct device *dev, 6186696777cSDuson Lin struct device_attribute *attr, 6196696777cSDuson Lin char *buf) 6206696777cSDuson Lin { 6216696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6226696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6236696777cSDuson Lin 6246696777cSDuson Lin return sprintf(buf, "%d.0\n", data->iap_version); 6256696777cSDuson Lin } 6266696777cSDuson Lin 6276696777cSDuson Lin static ssize_t elan_sysfs_update_fw(struct device *dev, 6286696777cSDuson Lin struct device_attribute *attr, 6296696777cSDuson Lin const char *buf, size_t count) 6306696777cSDuson Lin { 631bb03bf3fSDuson Lin struct elan_tp_data *data = dev_get_drvdata(dev); 6326696777cSDuson Lin const struct firmware *fw; 6337b9f1830SCharlie Mooney char *fw_name; 6346696777cSDuson Lin int error; 635bb03bf3fSDuson Lin const u8 *fw_signature; 636bb03bf3fSDuson Lin static const u8 signature[] = {0xAA, 0x55, 0xCC, 0x33, 0xFF, 0xFF}; 6376696777cSDuson Lin 6389d7b03f8SDaniel Drake if (data->fw_validpage_count == 0) 6399d7b03f8SDaniel Drake return -EINVAL; 6409d7b03f8SDaniel Drake 6417b9f1830SCharlie Mooney /* Look for a firmware with the product id appended. */ 6427b9f1830SCharlie Mooney fw_name = kasprintf(GFP_KERNEL, ETP_FW_NAME, data->product_id); 6437b9f1830SCharlie Mooney if (!fw_name) { 6447b9f1830SCharlie Mooney dev_err(dev, "failed to allocate memory for firmware name\n"); 6457b9f1830SCharlie Mooney return -ENOMEM; 6467b9f1830SCharlie Mooney } 6477b9f1830SCharlie Mooney 6487b9f1830SCharlie Mooney dev_info(dev, "requesting fw '%s'\n", fw_name); 6497b9f1830SCharlie Mooney error = request_firmware(&fw, fw_name, dev); 6507b9f1830SCharlie Mooney kfree(fw_name); 6516696777cSDuson Lin if (error) { 6527b9f1830SCharlie Mooney dev_err(dev, "failed to request firmware: %d\n", error); 6536696777cSDuson Lin return error; 6546696777cSDuson Lin } 6556696777cSDuson Lin 656bb03bf3fSDuson Lin /* Firmware file must match signature data */ 65712018ac3SDuson Lin fw_signature = &fw->data[data->fw_signature_address]; 658bb03bf3fSDuson Lin if (memcmp(fw_signature, signature, sizeof(signature)) != 0) { 659bb03bf3fSDuson Lin dev_err(dev, "signature mismatch (expected %*ph, got %*ph)\n", 660bb03bf3fSDuson Lin (int)sizeof(signature), signature, 661bb03bf3fSDuson Lin (int)sizeof(signature), fw_signature); 6626696777cSDuson Lin error = -EBADF; 6636696777cSDuson Lin goto out_release_fw; 6646696777cSDuson Lin } 6656696777cSDuson Lin 6666696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 6676696777cSDuson Lin if (error) 6686696777cSDuson Lin goto out_release_fw; 6696696777cSDuson Lin 6706696777cSDuson Lin error = elan_update_firmware(data, fw); 6716696777cSDuson Lin 6726696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6736696777cSDuson Lin 6746696777cSDuson Lin out_release_fw: 6756696777cSDuson Lin release_firmware(fw); 6766696777cSDuson Lin return error ?: count; 6776696777cSDuson Lin } 6786696777cSDuson Lin 6796696777cSDuson Lin static ssize_t calibrate_store(struct device *dev, 6806696777cSDuson Lin struct device_attribute *attr, 6816696777cSDuson Lin const char *buf, size_t count) 6826696777cSDuson Lin { 6836696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6846696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6856696777cSDuson Lin int tries = 20; 6866696777cSDuson Lin int retval; 6876696777cSDuson Lin int error; 68850fc7b61SBen Hutchings u8 val[ETP_CALIBRATE_MAX_LEN]; 6896696777cSDuson Lin 6906696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 6916696777cSDuson Lin if (retval) 6926696777cSDuson Lin return retval; 6936696777cSDuson Lin 6946696777cSDuson Lin disable_irq(client->irq); 6956696777cSDuson Lin 6966696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 6976696777cSDuson Lin retval = data->ops->set_mode(client, data->mode); 6986696777cSDuson Lin if (retval) { 6996696777cSDuson Lin dev_err(dev, "failed to enable calibration mode: %d\n", 7006696777cSDuson Lin retval); 7016696777cSDuson Lin goto out; 7026696777cSDuson Lin } 7036696777cSDuson Lin 7046696777cSDuson Lin retval = data->ops->calibrate(client); 7056696777cSDuson Lin if (retval) { 7066696777cSDuson Lin dev_err(dev, "failed to start calibration: %d\n", 7076696777cSDuson Lin retval); 7086696777cSDuson Lin goto out_disable_calibrate; 7096696777cSDuson Lin } 7106696777cSDuson Lin 7116696777cSDuson Lin val[0] = 0xff; 7126696777cSDuson Lin do { 7136696777cSDuson Lin /* Wait 250ms before checking if calibration has completed. */ 7146696777cSDuson Lin msleep(250); 7156696777cSDuson Lin 7166696777cSDuson Lin retval = data->ops->calibrate_result(client, val); 7176696777cSDuson Lin if (retval) 7186696777cSDuson Lin dev_err(dev, "failed to check calibration result: %d\n", 7196696777cSDuson Lin retval); 7206696777cSDuson Lin else if (val[0] == 0) 7216696777cSDuson Lin break; /* calibration done */ 7226696777cSDuson Lin 7236696777cSDuson Lin } while (--tries); 7246696777cSDuson Lin 7256696777cSDuson Lin if (tries == 0) { 7266696777cSDuson Lin dev_err(dev, "failed to calibrate. Timeout.\n"); 7276696777cSDuson Lin retval = -ETIMEDOUT; 7286696777cSDuson Lin } 7296696777cSDuson Lin 7306696777cSDuson Lin out_disable_calibrate: 7316696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 7326696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 7336696777cSDuson Lin if (error) { 7346696777cSDuson Lin dev_err(dev, "failed to disable calibration mode: %d\n", 7356696777cSDuson Lin error); 7366696777cSDuson Lin if (!retval) 7376696777cSDuson Lin retval = error; 7386696777cSDuson Lin } 7396696777cSDuson Lin out: 7406696777cSDuson Lin enable_irq(client->irq); 7416696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7426696777cSDuson Lin return retval ?: count; 7436696777cSDuson Lin } 7446696777cSDuson Lin 7456696777cSDuson Lin static ssize_t elan_sysfs_read_mode(struct device *dev, 7466696777cSDuson Lin struct device_attribute *attr, 7476696777cSDuson Lin char *buf) 7486696777cSDuson Lin { 7496696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7506696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7516696777cSDuson Lin int error; 7526696777cSDuson Lin enum tp_mode mode; 7536696777cSDuson Lin 7546696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 7556696777cSDuson Lin if (error) 7566696777cSDuson Lin return error; 7576696777cSDuson Lin 7586696777cSDuson Lin error = data->ops->iap_get_mode(data->client, &mode); 7596696777cSDuson Lin 7606696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7616696777cSDuson Lin 7626696777cSDuson Lin if (error) 7636696777cSDuson Lin return error; 7646696777cSDuson Lin 7656696777cSDuson Lin return sprintf(buf, "%d\n", (int)mode); 7666696777cSDuson Lin } 7676696777cSDuson Lin 7686696777cSDuson Lin static DEVICE_ATTR(product_id, S_IRUGO, elan_sysfs_read_product_id, NULL); 7696696777cSDuson Lin static DEVICE_ATTR(firmware_version, S_IRUGO, elan_sysfs_read_fw_ver, NULL); 7706696777cSDuson Lin static DEVICE_ATTR(sample_version, S_IRUGO, elan_sysfs_read_sm_ver, NULL); 7716696777cSDuson Lin static DEVICE_ATTR(iap_version, S_IRUGO, elan_sysfs_read_iap_ver, NULL); 7726696777cSDuson Lin static DEVICE_ATTR(fw_checksum, S_IRUGO, elan_sysfs_read_fw_checksum, NULL); 7736696777cSDuson Lin static DEVICE_ATTR(mode, S_IRUGO, elan_sysfs_read_mode, NULL); 7746696777cSDuson Lin static DEVICE_ATTR(update_fw, S_IWUSR, NULL, elan_sysfs_update_fw); 7756696777cSDuson Lin 7766696777cSDuson Lin static DEVICE_ATTR_WO(calibrate); 7776696777cSDuson Lin 7786696777cSDuson Lin static struct attribute *elan_sysfs_entries[] = { 7796696777cSDuson Lin &dev_attr_product_id.attr, 7806696777cSDuson Lin &dev_attr_firmware_version.attr, 7816696777cSDuson Lin &dev_attr_sample_version.attr, 7826696777cSDuson Lin &dev_attr_iap_version.attr, 7836696777cSDuson Lin &dev_attr_fw_checksum.attr, 7846696777cSDuson Lin &dev_attr_calibrate.attr, 7856696777cSDuson Lin &dev_attr_mode.attr, 7866696777cSDuson Lin &dev_attr_update_fw.attr, 7876696777cSDuson Lin NULL, 7886696777cSDuson Lin }; 7896696777cSDuson Lin 7906696777cSDuson Lin static const struct attribute_group elan_sysfs_group = { 7916696777cSDuson Lin .attrs = elan_sysfs_entries, 7926696777cSDuson Lin }; 7936696777cSDuson Lin 7946696777cSDuson Lin static ssize_t acquire_store(struct device *dev, struct device_attribute *attr, 7956696777cSDuson Lin const char *buf, size_t count) 7966696777cSDuson Lin { 7976696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7986696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7996696777cSDuson Lin int error; 8006696777cSDuson Lin int retval; 8016696777cSDuson Lin 8026696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8036696777cSDuson Lin if (retval) 8046696777cSDuson Lin return retval; 8056696777cSDuson Lin 8066696777cSDuson Lin disable_irq(client->irq); 8076696777cSDuson Lin 8086696777cSDuson Lin data->baseline_ready = false; 8096696777cSDuson Lin 8106696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 8116696777cSDuson Lin retval = data->ops->set_mode(data->client, data->mode); 8126696777cSDuson Lin if (retval) { 8136696777cSDuson Lin dev_err(dev, "Failed to enable calibration mode to get baseline: %d\n", 8146696777cSDuson Lin retval); 8156696777cSDuson Lin goto out; 8166696777cSDuson Lin } 8176696777cSDuson Lin 8186696777cSDuson Lin msleep(250); 8196696777cSDuson Lin 8206696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, true, 8216696777cSDuson Lin &data->max_baseline); 8226696777cSDuson Lin if (retval) { 8236696777cSDuson Lin dev_err(dev, "Failed to read max baseline form device: %d\n", 8246696777cSDuson Lin retval); 8256696777cSDuson Lin goto out_disable_calibrate; 8266696777cSDuson Lin } 8276696777cSDuson Lin 8286696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, false, 8296696777cSDuson Lin &data->min_baseline); 8306696777cSDuson Lin if (retval) { 8316696777cSDuson Lin dev_err(dev, "Failed to read min baseline form device: %d\n", 8326696777cSDuson Lin retval); 8336696777cSDuson Lin goto out_disable_calibrate; 8346696777cSDuson Lin } 8356696777cSDuson Lin 8366696777cSDuson Lin data->baseline_ready = true; 8376696777cSDuson Lin 8386696777cSDuson Lin out_disable_calibrate: 8396696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 8406696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 8416696777cSDuson Lin if (error) { 8426696777cSDuson Lin dev_err(dev, "Failed to disable calibration mode after acquiring baseline: %d\n", 8436696777cSDuson Lin error); 8446696777cSDuson Lin if (!retval) 8456696777cSDuson Lin retval = error; 8466696777cSDuson Lin } 8476696777cSDuson Lin out: 8486696777cSDuson Lin enable_irq(client->irq); 8496696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8506696777cSDuson Lin return retval ?: count; 8516696777cSDuson Lin } 8526696777cSDuson Lin 8536696777cSDuson Lin static ssize_t min_show(struct device *dev, 8546696777cSDuson Lin struct device_attribute *attr, char *buf) 8556696777cSDuson Lin { 8566696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 8576696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 8586696777cSDuson Lin int retval; 8596696777cSDuson Lin 8606696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8616696777cSDuson Lin if (retval) 8626696777cSDuson Lin return retval; 8636696777cSDuson Lin 8646696777cSDuson Lin if (!data->baseline_ready) { 8656696777cSDuson Lin retval = -ENODATA; 8666696777cSDuson Lin goto out; 8676696777cSDuson Lin } 8686696777cSDuson Lin 8696696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->min_baseline); 8706696777cSDuson Lin 8716696777cSDuson Lin out: 8726696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8736696777cSDuson Lin return retval; 8746696777cSDuson Lin } 8756696777cSDuson Lin 8766696777cSDuson Lin static ssize_t max_show(struct device *dev, 8776696777cSDuson Lin struct device_attribute *attr, char *buf) 8786696777cSDuson Lin { 8796696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 8806696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 8816696777cSDuson Lin int retval; 8826696777cSDuson Lin 8836696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8846696777cSDuson Lin if (retval) 8856696777cSDuson Lin return retval; 8866696777cSDuson Lin 8876696777cSDuson Lin if (!data->baseline_ready) { 8886696777cSDuson Lin retval = -ENODATA; 8896696777cSDuson Lin goto out; 8906696777cSDuson Lin } 8916696777cSDuson Lin 8926696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->max_baseline); 8936696777cSDuson Lin 8946696777cSDuson Lin out: 8956696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8966696777cSDuson Lin return retval; 8976696777cSDuson Lin } 8986696777cSDuson Lin 8996696777cSDuson Lin 9006696777cSDuson Lin static DEVICE_ATTR_WO(acquire); 9016696777cSDuson Lin static DEVICE_ATTR_RO(min); 9026696777cSDuson Lin static DEVICE_ATTR_RO(max); 9036696777cSDuson Lin 9046696777cSDuson Lin static struct attribute *elan_baseline_sysfs_entries[] = { 9056696777cSDuson Lin &dev_attr_acquire.attr, 9066696777cSDuson Lin &dev_attr_min.attr, 9076696777cSDuson Lin &dev_attr_max.attr, 9086696777cSDuson Lin NULL, 9096696777cSDuson Lin }; 9106696777cSDuson Lin 9116696777cSDuson Lin static const struct attribute_group elan_baseline_sysfs_group = { 9126696777cSDuson Lin .name = "baseline", 9136696777cSDuson Lin .attrs = elan_baseline_sysfs_entries, 9146696777cSDuson Lin }; 9156696777cSDuson Lin 9166696777cSDuson Lin static const struct attribute_group *elan_sysfs_groups[] = { 9176696777cSDuson Lin &elan_sysfs_group, 9186696777cSDuson Lin &elan_baseline_sysfs_group, 9196696777cSDuson Lin NULL 9206696777cSDuson Lin }; 9216696777cSDuson Lin 9226696777cSDuson Lin /* 9236696777cSDuson Lin ****************************************************************** 9246696777cSDuson Lin * Elan isr functions 9256696777cSDuson Lin ****************************************************************** 9266696777cSDuson Lin */ 92704d5ce62SJingle Wu static void elan_report_contact(struct elan_tp_data *data, int contact_num, 92804d5ce62SJingle Wu bool contact_valid, bool high_precision, 92904d5ce62SJingle Wu u8 *packet, u8 *finger_data) 9306696777cSDuson Lin { 9316696777cSDuson Lin struct input_dev *input = data->input; 9326696777cSDuson Lin unsigned int pos_x, pos_y; 93304d5ce62SJingle Wu unsigned int pressure, scaled_pressure; 9346696777cSDuson Lin 9356696777cSDuson Lin if (contact_valid) { 93604d5ce62SJingle Wu if (high_precision) { 93704d5ce62SJingle Wu pos_x = get_unaligned_be16(&finger_data[0]); 93804d5ce62SJingle Wu pos_y = get_unaligned_be16(&finger_data[2]); 93904d5ce62SJingle Wu } else { 94004d5ce62SJingle Wu pos_x = ((finger_data[0] & 0xf0) << 4) | finger_data[1]; 94104d5ce62SJingle Wu pos_y = ((finger_data[0] & 0x0f) << 8) | finger_data[2]; 94204d5ce62SJingle Wu } 9436696777cSDuson Lin 9446696777cSDuson Lin if (pos_x > data->max_x || pos_y > data->max_y) { 9456696777cSDuson Lin dev_dbg(input->dev.parent, 9466696777cSDuson Lin "[%d] x=%d y=%d over max (%d, %d)", 9476696777cSDuson Lin contact_num, pos_x, pos_y, 9486696777cSDuson Lin data->max_x, data->max_y); 9496696777cSDuson Lin return; 9506696777cSDuson Lin } 9516696777cSDuson Lin 95204d5ce62SJingle Wu pressure = finger_data[4]; 953b9bced0eSduson scaled_pressure = pressure + data->pressure_adjustment; 954b9bced0eSduson if (scaled_pressure > ETP_MAX_PRESSURE) 955b9bced0eSduson scaled_pressure = ETP_MAX_PRESSURE; 9566696777cSDuson Lin 9576696777cSDuson Lin input_mt_slot(input, contact_num); 9586696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 9596696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_X, pos_x); 9606696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_Y, data->max_y - pos_y); 961539c4b88Sduson input_report_abs(input, ABS_MT_PRESSURE, scaled_pressure); 96204d5ce62SJingle Wu 96304d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) { 96404d5ce62SJingle Wu unsigned int mk_x, mk_y, area_x, area_y; 96504d5ce62SJingle Wu u8 mk_data = high_precision ? 96604d5ce62SJingle Wu packet[ETP_MK_DATA_OFFSET + contact_num] : 96704d5ce62SJingle Wu finger_data[3]; 96804d5ce62SJingle Wu 96904d5ce62SJingle Wu mk_x = mk_data & 0x0f; 97004d5ce62SJingle Wu mk_y = mk_data >> 4; 97104d5ce62SJingle Wu 97204d5ce62SJingle Wu /* 97304d5ce62SJingle Wu * To avoid treating large finger as palm, let's reduce 97404d5ce62SJingle Wu * the width x and y per trace. 97504d5ce62SJingle Wu */ 97604d5ce62SJingle Wu area_x = mk_x * (data->width_x - ETP_FWIDTH_REDUCE); 97704d5ce62SJingle Wu area_y = mk_y * (data->width_y - ETP_FWIDTH_REDUCE); 97804d5ce62SJingle Wu 9796696777cSDuson Lin input_report_abs(input, ABS_TOOL_WIDTH, mk_x); 98004d5ce62SJingle Wu input_report_abs(input, ABS_MT_TOUCH_MAJOR, 98104d5ce62SJingle Wu max(area_x, area_y)); 98204d5ce62SJingle Wu input_report_abs(input, ABS_MT_TOUCH_MINOR, 98304d5ce62SJingle Wu min(area_x, area_y)); 98404d5ce62SJingle Wu } 9856696777cSDuson Lin } else { 9866696777cSDuson Lin input_mt_slot(input, contact_num); 9875fc70e35SJiada Wang input_mt_report_slot_inactive(input); 9886696777cSDuson Lin } 9896696777cSDuson Lin } 9906696777cSDuson Lin 99104d5ce62SJingle Wu static void elan_report_absolute(struct elan_tp_data *data, u8 *packet, 99204d5ce62SJingle Wu bool high_precision) 9936696777cSDuson Lin { 9946696777cSDuson Lin struct input_dev *input = data->input; 9956696777cSDuson Lin u8 *finger_data = &packet[ETP_FINGER_DATA_OFFSET]; 9966696777cSDuson Lin int i; 9976696777cSDuson Lin u8 tp_info = packet[ETP_TOUCH_INFO_OFFSET]; 998090ad325SDuson Lin u8 hover_info = packet[ETP_HOVER_INFO_OFFSET]; 999090ad325SDuson Lin bool contact_valid, hover_event; 10006696777cSDuson Lin 1001966334dfSDerek Basehore pm_wakeup_event(&data->client->dev, 0); 1002966334dfSDerek Basehore 100304d5ce62SJingle Wu hover_event = hover_info & BIT(6); 10046696777cSDuson Lin 100504d5ce62SJingle Wu for (i = 0; i < ETP_MAX_FINGERS; i++) { 100604d5ce62SJingle Wu contact_valid = tp_info & BIT(3 + i); 100704d5ce62SJingle Wu elan_report_contact(data, i, contact_valid, high_precision, 100804d5ce62SJingle Wu packet, finger_data); 10096696777cSDuson Lin if (contact_valid) 10106696777cSDuson Lin finger_data += ETP_FINGER_DATA_LEN; 10116696777cSDuson Lin } 10126696777cSDuson Lin 1013140a7952SBenjamin Tissoires input_report_key(input, BTN_LEFT, tp_info & BIT(0)); 1014140a7952SBenjamin Tissoires input_report_key(input, BTN_MIDDLE, tp_info & BIT(2)); 1015140a7952SBenjamin Tissoires input_report_key(input, BTN_RIGHT, tp_info & BIT(1)); 1016539c4b88Sduson input_report_abs(input, ABS_DISTANCE, hover_event != 0); 10176696777cSDuson Lin input_mt_report_pointer_emulation(input, true); 10186696777cSDuson Lin input_sync(input); 10196696777cSDuson Lin } 10206696777cSDuson Lin 1021559b3df7SBenjamin Tissoires static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report) 1022559b3df7SBenjamin Tissoires { 1023559b3df7SBenjamin Tissoires struct input_dev *input = data->tp_input; 1024559b3df7SBenjamin Tissoires u8 *packet = &report[ETP_REPORT_ID_OFFSET + 1]; 1025559b3df7SBenjamin Tissoires int x, y; 1026559b3df7SBenjamin Tissoires 1027966334dfSDerek Basehore pm_wakeup_event(&data->client->dev, 0); 1028966334dfSDerek Basehore 1029559b3df7SBenjamin Tissoires if (!data->tp_input) { 1030559b3df7SBenjamin Tissoires dev_warn_once(&data->client->dev, 1031559b3df7SBenjamin Tissoires "received a trackpoint report while no trackpoint device has been created. Please report upstream.\n"); 1032559b3df7SBenjamin Tissoires return; 1033559b3df7SBenjamin Tissoires } 1034559b3df7SBenjamin Tissoires 1035559b3df7SBenjamin Tissoires input_report_key(input, BTN_LEFT, packet[0] & 0x01); 1036559b3df7SBenjamin Tissoires input_report_key(input, BTN_RIGHT, packet[0] & 0x02); 1037559b3df7SBenjamin Tissoires input_report_key(input, BTN_MIDDLE, packet[0] & 0x04); 1038559b3df7SBenjamin Tissoires 1039559b3df7SBenjamin Tissoires if ((packet[3] & 0x0F) == 0x06) { 1040559b3df7SBenjamin Tissoires x = packet[4] - (int)((packet[1] ^ 0x80) << 1); 1041559b3df7SBenjamin Tissoires y = (int)((packet[2] ^ 0x80) << 1) - packet[5]; 1042559b3df7SBenjamin Tissoires 1043559b3df7SBenjamin Tissoires input_report_rel(input, REL_X, x); 1044559b3df7SBenjamin Tissoires input_report_rel(input, REL_Y, y); 1045559b3df7SBenjamin Tissoires } 1046559b3df7SBenjamin Tissoires 1047559b3df7SBenjamin Tissoires input_sync(input); 1048559b3df7SBenjamin Tissoires } 1049559b3df7SBenjamin Tissoires 10506696777cSDuson Lin static irqreturn_t elan_isr(int irq, void *dev_id) 10516696777cSDuson Lin { 10526696777cSDuson Lin struct elan_tp_data *data = dev_id; 10536696777cSDuson Lin int error; 10546696777cSDuson Lin u8 report[ETP_MAX_REPORT_LEN]; 10556696777cSDuson Lin 10566696777cSDuson Lin /* 10576696777cSDuson Lin * When device is connected to i2c bus, when all IAP page writes 10586696777cSDuson Lin * complete, the driver will receive interrupt and must read 10596696777cSDuson Lin * 0000 to confirm that IAP is finished. 10606696777cSDuson Lin */ 10616696777cSDuson Lin if (data->in_fw_update) { 10626696777cSDuson Lin complete(&data->fw_completion); 10636696777cSDuson Lin goto out; 10646696777cSDuson Lin } 10656696777cSDuson Lin 106604d5ce62SJingle Wu error = data->ops->get_report(data->client, report, data->report_len); 10676696777cSDuson Lin if (error) 10686696777cSDuson Lin goto out; 10696696777cSDuson Lin 1070559b3df7SBenjamin Tissoires switch (report[ETP_REPORT_ID_OFFSET]) { 1071559b3df7SBenjamin Tissoires case ETP_REPORT_ID: 107204d5ce62SJingle Wu elan_report_absolute(data, report, false); 107304d5ce62SJingle Wu break; 107404d5ce62SJingle Wu case ETP_REPORT_ID2: 107504d5ce62SJingle Wu elan_report_absolute(data, report, true); 1076559b3df7SBenjamin Tissoires break; 1077559b3df7SBenjamin Tissoires case ETP_TP_REPORT_ID: 1078559b3df7SBenjamin Tissoires elan_report_trackpoint(data, report); 1079559b3df7SBenjamin Tissoires break; 1080559b3df7SBenjamin Tissoires default: 1081966334dfSDerek Basehore dev_err(&data->client->dev, "invalid report id data (%x)\n", 10826696777cSDuson Lin report[ETP_REPORT_ID_OFFSET]); 1083559b3df7SBenjamin Tissoires } 10846696777cSDuson Lin 10856696777cSDuson Lin out: 10866696777cSDuson Lin return IRQ_HANDLED; 10876696777cSDuson Lin } 10886696777cSDuson Lin 10896696777cSDuson Lin /* 10906696777cSDuson Lin ****************************************************************** 10916696777cSDuson Lin * Elan initialization functions 10926696777cSDuson Lin ****************************************************************** 10936696777cSDuson Lin */ 1094559b3df7SBenjamin Tissoires 1095559b3df7SBenjamin Tissoires static int elan_setup_trackpoint_input_device(struct elan_tp_data *data) 1096559b3df7SBenjamin Tissoires { 1097559b3df7SBenjamin Tissoires struct device *dev = &data->client->dev; 1098559b3df7SBenjamin Tissoires struct input_dev *input; 1099559b3df7SBenjamin Tissoires 1100559b3df7SBenjamin Tissoires input = devm_input_allocate_device(dev); 1101559b3df7SBenjamin Tissoires if (!input) 1102559b3df7SBenjamin Tissoires return -ENOMEM; 1103559b3df7SBenjamin Tissoires 1104559b3df7SBenjamin Tissoires input->name = "Elan TrackPoint"; 1105559b3df7SBenjamin Tissoires input->id.bustype = BUS_I2C; 1106559b3df7SBenjamin Tissoires input->id.vendor = ELAN_VENDOR_ID; 1107559b3df7SBenjamin Tissoires input->id.product = data->product_id; 1108559b3df7SBenjamin Tissoires input_set_drvdata(input, data); 1109559b3df7SBenjamin Tissoires 1110559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_X); 1111559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_Y); 1112559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_LEFT); 1113559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_RIGHT); 1114559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_MIDDLE); 1115559b3df7SBenjamin Tissoires 1116559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTER, input->propbit); 1117559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTING_STICK, input->propbit); 1118559b3df7SBenjamin Tissoires 1119559b3df7SBenjamin Tissoires data->tp_input = input; 1120559b3df7SBenjamin Tissoires 1121559b3df7SBenjamin Tissoires return 0; 1122559b3df7SBenjamin Tissoires } 1123559b3df7SBenjamin Tissoires 11246696777cSDuson Lin static int elan_setup_input_device(struct elan_tp_data *data) 11256696777cSDuson Lin { 11266696777cSDuson Lin struct device *dev = &data->client->dev; 11276696777cSDuson Lin struct input_dev *input; 11286696777cSDuson Lin unsigned int max_width = max(data->width_x, data->width_y); 11296696777cSDuson Lin unsigned int min_width = min(data->width_x, data->width_y); 11306696777cSDuson Lin int error; 11316696777cSDuson Lin 11326696777cSDuson Lin input = devm_input_allocate_device(dev); 11336696777cSDuson Lin if (!input) 11346696777cSDuson Lin return -ENOMEM; 11356696777cSDuson Lin 11366696777cSDuson Lin input->name = "Elan Touchpad"; 11376696777cSDuson Lin input->id.bustype = BUS_I2C; 11383eab4588SCharlie Mooney input->id.vendor = ELAN_VENDOR_ID; 11393eab4588SCharlie Mooney input->id.product = data->product_id; 11406696777cSDuson Lin input_set_drvdata(input, data); 11416696777cSDuson Lin 11426696777cSDuson Lin error = input_mt_init_slots(input, ETP_MAX_FINGERS, 11436696777cSDuson Lin INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 11446696777cSDuson Lin if (error) { 11456696777cSDuson Lin dev_err(dev, "failed to initialize MT slots: %d\n", error); 11466696777cSDuson Lin return error; 11476696777cSDuson Lin } 11486696777cSDuson Lin 11496696777cSDuson Lin __set_bit(EV_ABS, input->evbit); 11506696777cSDuson Lin __set_bit(INPUT_PROP_POINTER, input->propbit); 1151140a7952SBenjamin Tissoires if (data->clickpad) { 11526696777cSDuson Lin __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 1153140a7952SBenjamin Tissoires } else { 115499136881SKT Liao __set_bit(BTN_RIGHT, input->keybit); 1155140a7952SBenjamin Tissoires if (data->middle_button) 1156140a7952SBenjamin Tissoires __set_bit(BTN_MIDDLE, input->keybit); 1157140a7952SBenjamin Tissoires } 11586696777cSDuson Lin __set_bit(BTN_LEFT, input->keybit); 11596696777cSDuson Lin 11606696777cSDuson Lin /* Set up ST parameters */ 11616696777cSDuson Lin input_set_abs_params(input, ABS_X, 0, data->max_x, 0, 0); 11626696777cSDuson Lin input_set_abs_params(input, ABS_Y, 0, data->max_y, 0, 0); 11636696777cSDuson Lin input_abs_set_res(input, ABS_X, data->x_res); 11646696777cSDuson Lin input_abs_set_res(input, ABS_Y, data->y_res); 11656696777cSDuson Lin input_set_abs_params(input, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0); 116604d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) 116704d5ce62SJingle Wu input_set_abs_params(input, ABS_TOOL_WIDTH, 116804d5ce62SJingle Wu 0, ETP_FINGER_WIDTH, 0, 0); 1169539c4b88Sduson input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 11706696777cSDuson Lin 11716696777cSDuson Lin /* And MT parameters */ 11726696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); 11736696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); 11746696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_X, data->x_res); 11756696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_Y, data->y_res); 11766696777cSDuson Lin input_set_abs_params(input, ABS_MT_PRESSURE, 0, 11776696777cSDuson Lin ETP_MAX_PRESSURE, 0, 0); 117804d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) { 117904d5ce62SJingle Wu input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 118004d5ce62SJingle Wu 0, ETP_FINGER_WIDTH * max_width, 0, 0); 118104d5ce62SJingle Wu input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 118204d5ce62SJingle Wu 0, ETP_FINGER_WIDTH * min_width, 0, 0); 118304d5ce62SJingle Wu } 11846696777cSDuson Lin 11856696777cSDuson Lin data->input = input; 11866696777cSDuson Lin 11876696777cSDuson Lin return 0; 11886696777cSDuson Lin } 11896696777cSDuson Lin 11906696777cSDuson Lin static void elan_disable_regulator(void *_data) 11916696777cSDuson Lin { 11926696777cSDuson Lin struct elan_tp_data *data = _data; 11936696777cSDuson Lin 11946696777cSDuson Lin regulator_disable(data->vcc); 11956696777cSDuson Lin } 11966696777cSDuson Lin 11976696777cSDuson Lin static int elan_probe(struct i2c_client *client, 11986696777cSDuson Lin const struct i2c_device_id *dev_id) 11996696777cSDuson Lin { 12006696777cSDuson Lin const struct elan_transport_ops *transport_ops; 12016696777cSDuson Lin struct device *dev = &client->dev; 12026696777cSDuson Lin struct elan_tp_data *data; 12036696777cSDuson Lin unsigned long irqflags; 12046696777cSDuson Lin int error; 12056696777cSDuson Lin 12066696777cSDuson Lin if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_I2C) && 12076696777cSDuson Lin i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 12086696777cSDuson Lin transport_ops = &elan_i2c_ops; 12096696777cSDuson Lin } else if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) && 12106696777cSDuson Lin i2c_check_functionality(client->adapter, 12116696777cSDuson Lin I2C_FUNC_SMBUS_BYTE_DATA | 12126696777cSDuson Lin I2C_FUNC_SMBUS_BLOCK_DATA | 12136696777cSDuson Lin I2C_FUNC_SMBUS_I2C_BLOCK)) { 12146696777cSDuson Lin transport_ops = &elan_smbus_ops; 12156696777cSDuson Lin } else { 12166696777cSDuson Lin dev_err(dev, "not a supported I2C/SMBus adapter\n"); 12176696777cSDuson Lin return -EIO; 12186696777cSDuson Lin } 12196696777cSDuson Lin 1220ad56814fSGuenter Roeck data = devm_kzalloc(dev, sizeof(struct elan_tp_data), GFP_KERNEL); 12216696777cSDuson Lin if (!data) 12226696777cSDuson Lin return -ENOMEM; 12236696777cSDuson Lin 12246696777cSDuson Lin i2c_set_clientdata(client, data); 12256696777cSDuson Lin 12266696777cSDuson Lin data->ops = transport_ops; 12276696777cSDuson Lin data->client = client; 12286696777cSDuson Lin init_completion(&data->fw_completion); 12296696777cSDuson Lin mutex_init(&data->sysfs_mutex); 12306696777cSDuson Lin 1231ad56814fSGuenter Roeck data->vcc = devm_regulator_get(dev, "vcc"); 12326696777cSDuson Lin if (IS_ERR(data->vcc)) { 12336696777cSDuson Lin error = PTR_ERR(data->vcc); 12346696777cSDuson Lin if (error != -EPROBE_DEFER) 1235ad56814fSGuenter Roeck dev_err(dev, "Failed to get 'vcc' regulator: %d\n", 12366696777cSDuson Lin error); 12376696777cSDuson Lin return error; 12386696777cSDuson Lin } 12396696777cSDuson Lin 12406696777cSDuson Lin error = regulator_enable(data->vcc); 12416696777cSDuson Lin if (error) { 1242ad56814fSGuenter Roeck dev_err(dev, "Failed to enable regulator: %d\n", error); 12436696777cSDuson Lin return error; 12446696777cSDuson Lin } 12456696777cSDuson Lin 12462e75cfaaSDmitry Torokhov error = devm_add_action_or_reset(dev, elan_disable_regulator, data); 12476696777cSDuson Lin if (error) { 1248ad56814fSGuenter Roeck dev_err(dev, "Failed to add disable regulator action: %d\n", 12496696777cSDuson Lin error); 12506696777cSDuson Lin return error; 12516696777cSDuson Lin } 12526696777cSDuson Lin 1253c5928551SDmitry Torokhov /* Make sure there is something at this address */ 1254c5928551SDmitry Torokhov error = i2c_smbus_read_byte(client); 1255c5928551SDmitry Torokhov if (error < 0) { 1256c5928551SDmitry Torokhov dev_dbg(&client->dev, "nothing at this address: %d\n", error); 1257c5928551SDmitry Torokhov return -ENXIO; 1258c5928551SDmitry Torokhov } 1259c5928551SDmitry Torokhov 12606696777cSDuson Lin /* Initialize the touchpad. */ 12616696777cSDuson Lin error = elan_initialize(data); 12626696777cSDuson Lin if (error) 12636696777cSDuson Lin return error; 12646696777cSDuson Lin 12656696777cSDuson Lin error = elan_query_device_info(data); 12666696777cSDuson Lin if (error) 12676696777cSDuson Lin return error; 12686696777cSDuson Lin 12696696777cSDuson Lin error = elan_query_device_parameters(data); 12706696777cSDuson Lin if (error) 12716696777cSDuson Lin return error; 12726696777cSDuson Lin 1273ad56814fSGuenter Roeck dev_info(dev, 127439a0d75aSBenjamin Tissoires "Elan Touchpad: Module ID: 0x%04x, Firmware: 0x%04x, Sample: 0x%04x, IAP: 0x%04x\n", 12756696777cSDuson Lin data->product_id, 12766696777cSDuson Lin data->fw_version, 12776696777cSDuson Lin data->sm_version, 127839a0d75aSBenjamin Tissoires data->iap_version); 127939a0d75aSBenjamin Tissoires 1280ad56814fSGuenter Roeck dev_dbg(dev, 128139a0d75aSBenjamin Tissoires "Elan Touchpad Extra Information:\n" 128239a0d75aSBenjamin Tissoires " Max ABS X,Y: %d,%d\n" 128339a0d75aSBenjamin Tissoires " Width X,Y: %d,%d\n" 1284a2eaf299SKT Liao " Resolution X,Y: %d,%d (dots/mm)\n" 1285a2eaf299SKT Liao " ic type: 0x%x\n" 1286a2eaf299SKT Liao " info pattern: 0x%x\n", 12876696777cSDuson Lin data->max_x, data->max_y, 12886696777cSDuson Lin data->width_x, data->width_y, 1289a2eaf299SKT Liao data->x_res, data->y_res, 1290a2eaf299SKT Liao data->ic_type, data->pattern); 12916696777cSDuson Lin 12926696777cSDuson Lin /* Set up input device properties based on queried parameters. */ 12936696777cSDuson Lin error = elan_setup_input_device(data); 12946696777cSDuson Lin if (error) 12956696777cSDuson Lin return error; 12966696777cSDuson Lin 1297559b3df7SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,trackpoint")) { 1298559b3df7SBenjamin Tissoires error = elan_setup_trackpoint_input_device(data); 1299559b3df7SBenjamin Tissoires if (error) 1300559b3df7SBenjamin Tissoires return error; 1301559b3df7SBenjamin Tissoires } 1302559b3df7SBenjamin Tissoires 13036696777cSDuson Lin /* 1304a4b0a58bSDmitry Torokhov * Platform code (ACPI, DTS) should normally set up interrupt 1305a4b0a58bSDmitry Torokhov * for us, but in case it did not let's fall back to using falling 1306a4b0a58bSDmitry Torokhov * edge to be compatible with older Chromebooks. 13076696777cSDuson Lin */ 1308a4b0a58bSDmitry Torokhov irqflags = irq_get_trigger_type(client->irq); 1309a4b0a58bSDmitry Torokhov if (!irqflags) 1310a4b0a58bSDmitry Torokhov irqflags = IRQF_TRIGGER_FALLING; 13116696777cSDuson Lin 1312ad56814fSGuenter Roeck error = devm_request_threaded_irq(dev, client->irq, NULL, elan_isr, 13136696777cSDuson Lin irqflags | IRQF_ONESHOT, 13146696777cSDuson Lin client->name, data); 13156696777cSDuson Lin if (error) { 1316ad56814fSGuenter Roeck dev_err(dev, "cannot register irq=%d\n", client->irq); 13176696777cSDuson Lin return error; 13186696777cSDuson Lin } 13196696777cSDuson Lin 13209609b904SDmitry Torokhov error = devm_device_add_groups(dev, elan_sysfs_groups); 13216696777cSDuson Lin if (error) { 1322ad56814fSGuenter Roeck dev_err(dev, "failed to create sysfs attributes: %d\n", error); 13236696777cSDuson Lin return error; 13246696777cSDuson Lin } 13256696777cSDuson Lin 13266696777cSDuson Lin error = input_register_device(data->input); 13276696777cSDuson Lin if (error) { 1328ad56814fSGuenter Roeck dev_err(dev, "failed to register input device: %d\n", error); 13296696777cSDuson Lin return error; 13306696777cSDuson Lin } 13316696777cSDuson Lin 1332559b3df7SBenjamin Tissoires if (data->tp_input) { 1333559b3df7SBenjamin Tissoires error = input_register_device(data->tp_input); 1334559b3df7SBenjamin Tissoires if (error) { 1335559b3df7SBenjamin Tissoires dev_err(&client->dev, 1336559b3df7SBenjamin Tissoires "failed to register TrackPoint input device: %d\n", 1337559b3df7SBenjamin Tissoires error); 1338559b3df7SBenjamin Tissoires return error; 1339559b3df7SBenjamin Tissoires } 1340559b3df7SBenjamin Tissoires } 1341559b3df7SBenjamin Tissoires 13426696777cSDuson Lin /* 13436696777cSDuson Lin * Systems using device tree should set up wakeup via DTS, 13446696777cSDuson Lin * the rest will configure device as wakeup source by default. 13456696777cSDuson Lin */ 1346ad56814fSGuenter Roeck if (!dev->of_node) 1347ad56814fSGuenter Roeck device_init_wakeup(dev, true); 13486696777cSDuson Lin 13496696777cSDuson Lin return 0; 13506696777cSDuson Lin } 13516696777cSDuson Lin 13526696777cSDuson Lin static int __maybe_unused elan_suspend(struct device *dev) 13536696777cSDuson Lin { 13546696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 13556696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 13566696777cSDuson Lin int ret; 13576696777cSDuson Lin 13586696777cSDuson Lin /* 13596696777cSDuson Lin * We are taking the mutex to make sure sysfs operations are 13606696777cSDuson Lin * complete before we attempt to bring the device into low[er] 13616696777cSDuson Lin * power mode. 13626696777cSDuson Lin */ 13636696777cSDuson Lin ret = mutex_lock_interruptible(&data->sysfs_mutex); 13646696777cSDuson Lin if (ret) 13656696777cSDuson Lin return ret; 13666696777cSDuson Lin 13676696777cSDuson Lin disable_irq(client->irq); 13686696777cSDuson Lin 13696696777cSDuson Lin if (device_may_wakeup(dev)) { 13706696777cSDuson Lin ret = elan_sleep(data); 13716696777cSDuson Lin /* Enable wake from IRQ */ 13726696777cSDuson Lin data->irq_wake = (enable_irq_wake(client->irq) == 0); 13736696777cSDuson Lin } else { 13746696777cSDuson Lin ret = elan_disable_power(data); 13756696777cSDuson Lin } 13766696777cSDuson Lin 13776696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 13786696777cSDuson Lin return ret; 13796696777cSDuson Lin } 13806696777cSDuson Lin 13816696777cSDuson Lin static int __maybe_unused elan_resume(struct device *dev) 13826696777cSDuson Lin { 13836696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 13846696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 13856696777cSDuson Lin int error; 13866696777cSDuson Lin 13876696777cSDuson Lin if (device_may_wakeup(dev) && data->irq_wake) { 13886696777cSDuson Lin disable_irq_wake(client->irq); 13896696777cSDuson Lin data->irq_wake = false; 13906696777cSDuson Lin } 13916696777cSDuson Lin 13926696777cSDuson Lin error = elan_enable_power(data); 1393b3beed7fSDuson Lin if (error) { 13946696777cSDuson Lin dev_err(dev, "power up when resuming failed: %d\n", error); 1395b3beed7fSDuson Lin goto err; 1396b3beed7fSDuson Lin } 13976696777cSDuson Lin 13986696777cSDuson Lin error = elan_initialize(data); 13996696777cSDuson Lin if (error) 14006696777cSDuson Lin dev_err(dev, "initialize when resuming failed: %d\n", error); 14016696777cSDuson Lin 1402b3beed7fSDuson Lin err: 14036696777cSDuson Lin enable_irq(data->client->irq); 1404b3beed7fSDuson Lin return error; 14056696777cSDuson Lin } 14066696777cSDuson Lin 14076696777cSDuson Lin static SIMPLE_DEV_PM_OPS(elan_pm_ops, elan_suspend, elan_resume); 14086696777cSDuson Lin 14096696777cSDuson Lin static const struct i2c_device_id elan_id[] = { 14106696777cSDuson Lin { DRIVER_NAME, 0 }, 14116696777cSDuson Lin { }, 14126696777cSDuson Lin }; 14136696777cSDuson Lin MODULE_DEVICE_TABLE(i2c, elan_id); 14146696777cSDuson Lin 14156696777cSDuson Lin #ifdef CONFIG_ACPI 14166696777cSDuson Lin MODULE_DEVICE_TABLE(acpi, elan_acpi_id); 14176696777cSDuson Lin #endif 14186696777cSDuson Lin 14196696777cSDuson Lin #ifdef CONFIG_OF 14206696777cSDuson Lin static const struct of_device_id elan_of_match[] = { 14216696777cSDuson Lin { .compatible = "elan,ekth3000" }, 14226696777cSDuson Lin { /* sentinel */ } 14236696777cSDuson Lin }; 14246696777cSDuson Lin MODULE_DEVICE_TABLE(of, elan_of_match); 14256696777cSDuson Lin #endif 14266696777cSDuson Lin 14276696777cSDuson Lin static struct i2c_driver elan_driver = { 14286696777cSDuson Lin .driver = { 14296696777cSDuson Lin .name = DRIVER_NAME, 14306696777cSDuson Lin .pm = &elan_pm_ops, 14316696777cSDuson Lin .acpi_match_table = ACPI_PTR(elan_acpi_id), 14326696777cSDuson Lin .of_match_table = of_match_ptr(elan_of_match), 143371d0f562SDmitry Torokhov .probe_type = PROBE_PREFER_ASYNCHRONOUS, 14346696777cSDuson Lin }, 14356696777cSDuson Lin .probe = elan_probe, 14366696777cSDuson Lin .id_table = elan_id, 14376696777cSDuson Lin }; 14386696777cSDuson Lin 14396696777cSDuson Lin module_i2c_driver(elan_driver); 14406696777cSDuson Lin 14416696777cSDuson Lin MODULE_AUTHOR("Duson Lin <dusonlin@emc.com.tw>"); 14426696777cSDuson Lin MODULE_DESCRIPTION("Elan I2C/SMBus Touchpad driver"); 14436696777cSDuson Lin MODULE_LICENSE("GPL"); 1444