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> 376696777cSDuson Lin #include <linux/regulator/consumer.h> 386696777cSDuson Lin #include <asm/unaligned.h> 396696777cSDuson Lin 406696777cSDuson Lin #include "elan_i2c.h" 416696777cSDuson Lin 426696777cSDuson Lin #define DRIVER_NAME "elan_i2c" 433eab4588SCharlie Mooney #define ELAN_VENDOR_ID 0x04f3 446696777cSDuson Lin #define ETP_MAX_PRESSURE 255 456696777cSDuson Lin #define ETP_FWIDTH_REDUCE 90 466696777cSDuson Lin #define ETP_FINGER_WIDTH 15 476696777cSDuson Lin #define ETP_RETRY_COUNT 3 486696777cSDuson Lin 49ea16ef96SJingle Wu /* quirks to control the device */ 50ea16ef96SJingle Wu #define ETP_QUIRK_QUICK_WAKEUP BIT(0) 51ea16ef96SJingle Wu 526696777cSDuson Lin /* The main device structure */ 536696777cSDuson Lin struct elan_tp_data { 546696777cSDuson Lin struct i2c_client *client; 556696777cSDuson Lin struct input_dev *input; 56559b3df7SBenjamin Tissoires struct input_dev *tp_input; /* trackpoint input node */ 576696777cSDuson Lin struct regulator *vcc; 586696777cSDuson Lin 596696777cSDuson Lin const struct elan_transport_ops *ops; 606696777cSDuson Lin 616696777cSDuson Lin /* for fw update */ 626696777cSDuson Lin struct completion fw_completion; 636696777cSDuson Lin bool in_fw_update; 646696777cSDuson Lin 656696777cSDuson Lin struct mutex sysfs_mutex; 666696777cSDuson Lin 676696777cSDuson Lin unsigned int max_x; 686696777cSDuson Lin unsigned int max_y; 696696777cSDuson Lin unsigned int width_x; 706696777cSDuson Lin unsigned int width_y; 716696777cSDuson Lin unsigned int x_res; 726696777cSDuson Lin unsigned int y_res; 736696777cSDuson Lin 74a2eaf299SKT Liao u8 pattern; 75ed75a14eSDuson Lin u16 product_id; 766696777cSDuson Lin u8 fw_version; 776696777cSDuson Lin u8 sm_version; 786696777cSDuson Lin u8 iap_version; 796696777cSDuson Lin u16 fw_checksum; 8004d5ce62SJingle Wu unsigned int report_features; 8104d5ce62SJingle Wu unsigned int report_len; 82b9bced0eSduson int pressure_adjustment; 836696777cSDuson Lin u8 mode; 84a2eaf299SKT Liao u16 ic_type; 85742f452bSBenson Leung u16 fw_validpage_count; 86059d6c2dSJingle Wu u16 fw_page_size; 87059d6c2dSJingle Wu u32 fw_signature_address; 886696777cSDuson Lin 896696777cSDuson Lin bool irq_wake; 906696777cSDuson Lin 916696777cSDuson Lin u8 min_baseline; 926696777cSDuson Lin u8 max_baseline; 936696777cSDuson Lin bool baseline_ready; 9499136881SKT Liao u8 clickpad; 95140a7952SBenjamin Tissoires bool middle_button; 96ea16ef96SJingle Wu 97ea16ef96SJingle Wu u32 quirks; /* Various quirks */ 986696777cSDuson Lin }; 996696777cSDuson Lin 100ea16ef96SJingle Wu static u32 elan_i2c_lookup_quirks(u16 ic_type, u16 product_id) 101ea16ef96SJingle Wu { 102ea16ef96SJingle Wu static const struct { 103ea16ef96SJingle Wu u16 ic_type; 104ea16ef96SJingle Wu u16 product_id; 105ea16ef96SJingle Wu u32 quirks; 106ea16ef96SJingle Wu } elan_i2c_quirks[] = { 107ea16ef96SJingle Wu { 0x0D, ETP_PRODUCT_ID_DELBIN, ETP_QUIRK_QUICK_WAKEUP }, 108d198b827Sjingle.wu { 0x0D, ETP_PRODUCT_ID_WHITEBOX, ETP_QUIRK_QUICK_WAKEUP }, 109ea16ef96SJingle Wu { 0x10, ETP_PRODUCT_ID_VOXEL, ETP_QUIRK_QUICK_WAKEUP }, 110ea16ef96SJingle Wu { 0x14, ETP_PRODUCT_ID_MAGPIE, ETP_QUIRK_QUICK_WAKEUP }, 111ea16ef96SJingle Wu { 0x14, ETP_PRODUCT_ID_BOBBA, ETP_QUIRK_QUICK_WAKEUP }, 112ea16ef96SJingle Wu }; 113ea16ef96SJingle Wu u32 quirks = 0; 114ea16ef96SJingle Wu int i; 115ea16ef96SJingle Wu 116ea16ef96SJingle Wu for (i = 0; i < ARRAY_SIZE(elan_i2c_quirks); i++) { 117ea16ef96SJingle Wu if (elan_i2c_quirks[i].ic_type == ic_type && 118ea16ef96SJingle Wu elan_i2c_quirks[i].product_id == product_id) { 119ea16ef96SJingle Wu quirks = elan_i2c_quirks[i].quirks; 120ea16ef96SJingle Wu } 121ea16ef96SJingle Wu } 122ea16ef96SJingle Wu 123ea16ef96SJingle Wu if (ic_type >= 0x0D && product_id >= 0x123) 124ea16ef96SJingle Wu quirks |= ETP_QUIRK_QUICK_WAKEUP; 125ea16ef96SJingle Wu 126ea16ef96SJingle Wu return quirks; 127ea16ef96SJingle Wu } 128ea16ef96SJingle Wu 129bfd9b92bSJingle Wu static int elan_get_fwinfo(u16 ic_type, u8 iap_version, u16 *validpage_count, 130059d6c2dSJingle Wu u32 *signature_address, u16 *page_size) 13112018ac3SDuson Lin { 132a2eaf299SKT Liao switch (ic_type) { 13322ef28b4Sduson case 0x00: 13422ef28b4Sduson case 0x06: 135534fcb3bSMichele Curti case 0x08: 136742f452bSBenson Leung *validpage_count = 512; 137534fcb3bSMichele Curti break; 138c84333a1SDuson Lin case 0x03: 13922ef28b4Sduson case 0x07: 14022ef28b4Sduson case 0x09: 14122ef28b4Sduson case 0x0A: 14222ef28b4Sduson case 0x0B: 14322ef28b4Sduson case 0x0C: 144742f452bSBenson Leung *validpage_count = 768; 14512018ac3SDuson Lin break; 14612018ac3SDuson Lin case 0x0D: 147742f452bSBenson Leung *validpage_count = 896; 14812018ac3SDuson Lin break; 14922ef28b4Sduson case 0x0E: 15022ef28b4Sduson *validpage_count = 640; 15122ef28b4Sduson break; 152a2eaf299SKT Liao case 0x10: 153a2eaf299SKT Liao *validpage_count = 1024; 154a2eaf299SKT Liao break; 1558d73ec74SJingle Wu case 0x11: 1568d73ec74SJingle Wu *validpage_count = 1280; 1578d73ec74SJingle Wu break; 1588d73ec74SJingle Wu case 0x13: 1598d73ec74SJingle Wu *validpage_count = 2048; 1608d73ec74SJingle Wu break; 1618d73ec74SJingle Wu case 0x14: 162873a3a14SJingle Wu case 0x15: 1638d73ec74SJingle Wu *validpage_count = 1024; 1648d73ec74SJingle Wu break; 16512018ac3SDuson Lin default: 16612018ac3SDuson Lin /* unknown ic type clear value */ 167742f452bSBenson Leung *validpage_count = 0; 16812018ac3SDuson Lin *signature_address = 0; 169059d6c2dSJingle Wu *page_size = 0; 17012018ac3SDuson Lin return -ENXIO; 17112018ac3SDuson Lin } 17212018ac3SDuson Lin 17312018ac3SDuson Lin *signature_address = 174742f452bSBenson Leung (*validpage_count * ETP_FW_PAGE_SIZE) - ETP_FW_SIGNATURE_SIZE; 17512018ac3SDuson Lin 176873a3a14SJingle Wu if ((ic_type == 0x14 || ic_type == 0x15) && iap_version >= 2) { 1778d73ec74SJingle Wu *validpage_count /= 8; 1788d73ec74SJingle Wu *page_size = ETP_FW_PAGE_SIZE_512; 1798d73ec74SJingle Wu } else if (ic_type >= 0x0D && iap_version >= 1) { 180bfd9b92bSJingle Wu *validpage_count /= 2; 181bfd9b92bSJingle Wu *page_size = ETP_FW_PAGE_SIZE_128; 182bfd9b92bSJingle Wu } else { 183059d6c2dSJingle Wu *page_size = ETP_FW_PAGE_SIZE; 184bfd9b92bSJingle Wu } 185059d6c2dSJingle Wu 18612018ac3SDuson Lin return 0; 18712018ac3SDuson Lin } 18812018ac3SDuson Lin 18981a36d8cSHans de Goede static int elan_set_power(struct elan_tp_data *data, bool on) 1906696777cSDuson Lin { 1916696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 1926696777cSDuson Lin int error; 1936696777cSDuson Lin 1946696777cSDuson Lin do { 19581a36d8cSHans de Goede error = data->ops->power_control(data->client, on); 1966696777cSDuson Lin if (error >= 0) 1976696777cSDuson Lin return 0; 1986696777cSDuson Lin 1996696777cSDuson Lin msleep(30); 2006696777cSDuson Lin } while (--repeat > 0); 2016696777cSDuson Lin 20281a36d8cSHans de Goede dev_err(&data->client->dev, "failed to set power %s: %d\n", 20381a36d8cSHans de Goede on ? "on" : "off", error); 2046696777cSDuson Lin return error; 2056696777cSDuson Lin } 2066696777cSDuson Lin 2076696777cSDuson Lin static int elan_sleep(struct elan_tp_data *data) 2086696777cSDuson Lin { 2096696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 2106696777cSDuson Lin int error; 2116696777cSDuson Lin 2126696777cSDuson Lin do { 2136696777cSDuson Lin error = data->ops->sleep_control(data->client, true); 2146696777cSDuson Lin if (!error) 2156696777cSDuson Lin return 0; 2166696777cSDuson Lin 2176696777cSDuson Lin msleep(30); 2186696777cSDuson Lin } while (--repeat > 0); 2196696777cSDuson Lin 2206696777cSDuson Lin return error; 2216696777cSDuson Lin } 2226696777cSDuson Lin 2232de4fcc6SKT Liao static int elan_query_product(struct elan_tp_data *data) 2242de4fcc6SKT Liao { 2252de4fcc6SKT Liao int error; 2262de4fcc6SKT Liao 2272de4fcc6SKT Liao error = data->ops->get_product_id(data->client, &data->product_id); 2282de4fcc6SKT Liao if (error) 2292de4fcc6SKT Liao return error; 2302de4fcc6SKT Liao 2313d712af6SDmitry Torokhov error = data->ops->get_pattern(data->client, &data->pattern); 2323d712af6SDmitry Torokhov if (error) 2333d712af6SDmitry Torokhov return error; 2343d712af6SDmitry Torokhov 2353d712af6SDmitry Torokhov error = data->ops->get_sm_version(data->client, data->pattern, 2363d712af6SDmitry Torokhov &data->ic_type, &data->sm_version, 2373d712af6SDmitry Torokhov &data->clickpad); 2382de4fcc6SKT Liao if (error) 2392de4fcc6SKT Liao return error; 2402de4fcc6SKT Liao 2412de4fcc6SKT Liao return 0; 2422de4fcc6SKT Liao } 2432de4fcc6SKT Liao 2442de4fcc6SKT Liao static int elan_check_ASUS_special_fw(struct elan_tp_data *data) 2452de4fcc6SKT Liao { 24692ef6f97SMatjaz Hegedic if (data->ic_type == 0x0E) { 2472de4fcc6SKT Liao switch (data->product_id) { 2482de4fcc6SKT Liao case 0x05 ... 0x07: 2492de4fcc6SKT Liao case 0x09: 2502de4fcc6SKT Liao case 0x13: 2512de4fcc6SKT Liao return true; 2522de4fcc6SKT Liao } 25392ef6f97SMatjaz Hegedic } else if (data->ic_type == 0x08 && data->product_id == 0x26) { 25492ef6f97SMatjaz Hegedic /* ASUS EeeBook X205TA */ 25592ef6f97SMatjaz Hegedic return true; 25692ef6f97SMatjaz Hegedic } 25792ef6f97SMatjaz Hegedic 25892ef6f97SMatjaz Hegedic return false; 2592de4fcc6SKT Liao } 2602de4fcc6SKT Liao 261ea16ef96SJingle Wu static int __elan_initialize(struct elan_tp_data *data, bool skip_reset) 2626696777cSDuson Lin { 2636696777cSDuson Lin struct i2c_client *client = data->client; 2642de4fcc6SKT Liao bool woken_up = false; 2656696777cSDuson Lin int error; 2666696777cSDuson Lin 267ea16ef96SJingle Wu if (!skip_reset) { 2686696777cSDuson Lin error = data->ops->initialize(client); 2696696777cSDuson Lin if (error) { 2706696777cSDuson Lin dev_err(&client->dev, "device initialize failed: %d\n", error); 2716696777cSDuson Lin return error; 2726696777cSDuson Lin } 273ea16ef96SJingle Wu } 2746696777cSDuson Lin 2752de4fcc6SKT Liao error = elan_query_product(data); 2762de4fcc6SKT Liao if (error) 2772de4fcc6SKT Liao return error; 2782de4fcc6SKT Liao 2792de4fcc6SKT Liao /* 2802de4fcc6SKT Liao * Some ASUS devices were shipped with firmware that requires 2812de4fcc6SKT Liao * touchpads to be woken up first, before attempting to switch 2822de4fcc6SKT Liao * them into absolute reporting mode. 2832de4fcc6SKT Liao */ 2842de4fcc6SKT Liao if (elan_check_ASUS_special_fw(data)) { 2852de4fcc6SKT Liao error = data->ops->sleep_control(client, false); 2862de4fcc6SKT Liao if (error) { 2872de4fcc6SKT Liao dev_err(&client->dev, 2882de4fcc6SKT Liao "failed to wake device up: %d\n", error); 2892de4fcc6SKT Liao return error; 2902de4fcc6SKT Liao } 2912de4fcc6SKT Liao 2922de4fcc6SKT Liao msleep(200); 2932de4fcc6SKT Liao woken_up = true; 2942de4fcc6SKT Liao } 2952de4fcc6SKT Liao 2966696777cSDuson Lin data->mode |= ETP_ENABLE_ABS; 2976696777cSDuson Lin error = data->ops->set_mode(client, data->mode); 2986696777cSDuson Lin if (error) { 2996696777cSDuson Lin dev_err(&client->dev, 3006696777cSDuson Lin "failed to switch to absolute mode: %d\n", error); 3016696777cSDuson Lin return error; 3026696777cSDuson Lin } 3036696777cSDuson Lin 3042de4fcc6SKT Liao if (!woken_up) { 3056696777cSDuson Lin error = data->ops->sleep_control(client, false); 3066696777cSDuson Lin if (error) { 3076696777cSDuson Lin dev_err(&client->dev, 3086696777cSDuson Lin "failed to wake device up: %d\n", error); 3096696777cSDuson Lin return error; 3106696777cSDuson Lin } 3112de4fcc6SKT Liao } 3126696777cSDuson Lin 3136696777cSDuson Lin return 0; 3146696777cSDuson Lin } 3156696777cSDuson Lin 316ea16ef96SJingle Wu static int elan_initialize(struct elan_tp_data *data, bool skip_reset) 3176696777cSDuson Lin { 3186696777cSDuson Lin int repeat = ETP_RETRY_COUNT; 3196696777cSDuson Lin int error; 3206696777cSDuson Lin 3216696777cSDuson Lin do { 322ea16ef96SJingle Wu error = __elan_initialize(data, skip_reset); 3236696777cSDuson Lin if (!error) 3246696777cSDuson Lin return 0; 3256696777cSDuson Lin 326ea16ef96SJingle Wu skip_reset = false; 3276696777cSDuson Lin msleep(30); 3286696777cSDuson Lin } while (--repeat > 0); 3296696777cSDuson Lin 3306696777cSDuson Lin return error; 3316696777cSDuson Lin } 3326696777cSDuson Lin 3336696777cSDuson Lin static int elan_query_device_info(struct elan_tp_data *data) 3346696777cSDuson Lin { 3356696777cSDuson Lin int error; 3366696777cSDuson Lin 3373d712af6SDmitry Torokhov error = data->ops->get_version(data->client, data->pattern, false, 3383d712af6SDmitry Torokhov &data->fw_version); 3396696777cSDuson Lin if (error) 3406696777cSDuson Lin return error; 3416696777cSDuson Lin 3426696777cSDuson Lin error = data->ops->get_checksum(data->client, false, 3436696777cSDuson Lin &data->fw_checksum); 3446696777cSDuson Lin if (error) 3456696777cSDuson Lin return error; 3466696777cSDuson Lin 3473d712af6SDmitry Torokhov error = data->ops->get_version(data->client, data->pattern, 3483d712af6SDmitry Torokhov true, &data->iap_version); 3496696777cSDuson Lin if (error) 3506696777cSDuson Lin return error; 3516696777cSDuson Lin 352b9bced0eSduson error = data->ops->get_pressure_adjustment(data->client, 353b9bced0eSduson &data->pressure_adjustment); 354b9bced0eSduson if (error) 355b9bced0eSduson return error; 356b9bced0eSduson 35704d5ce62SJingle Wu error = data->ops->get_report_features(data->client, data->pattern, 35804d5ce62SJingle Wu &data->report_features, 35904d5ce62SJingle Wu &data->report_len); 360a2eaf299SKT Liao if (error) 361a2eaf299SKT Liao return error; 362a2eaf299SKT Liao 363ea16ef96SJingle Wu data->quirks = elan_i2c_lookup_quirks(data->ic_type, data->product_id); 364ea16ef96SJingle Wu 365bfd9b92bSJingle Wu error = elan_get_fwinfo(data->ic_type, data->iap_version, 366bfd9b92bSJingle Wu &data->fw_validpage_count, 367059d6c2dSJingle Wu &data->fw_signature_address, 368059d6c2dSJingle Wu &data->fw_page_size); 3699d7b03f8SDaniel Drake if (error) 3709d7b03f8SDaniel Drake dev_warn(&data->client->dev, 3719d7b03f8SDaniel Drake "unexpected iap version %#04x (ic type: %#04x), firmware update will not work\n", 3729d7b03f8SDaniel Drake data->iap_version, data->ic_type); 37312018ac3SDuson Lin 3746696777cSDuson Lin return 0; 3756696777cSDuson Lin } 3766696777cSDuson Lin 37704d5ce62SJingle Wu static unsigned int elan_convert_resolution(u8 val, u8 pattern) 3786696777cSDuson Lin { 3796696777cSDuson Lin /* 38004d5ce62SJingle Wu * pattern <= 0x01: 3816696777cSDuson Lin * (value from firmware) * 10 + 790 = dpi 38204d5ce62SJingle Wu * else 38304d5ce62SJingle Wu * ((value from firmware) + 3) * 100 = dpi 38404d5ce62SJingle Wu */ 38504d5ce62SJingle Wu int res = pattern <= 0x01 ? 38604d5ce62SJingle Wu (int)(char)val * 10 + 790 : ((int)(char)val + 3) * 100; 38704d5ce62SJingle Wu /* 3886696777cSDuson Lin * We also have to convert dpi to dots/mm (*10/254 to avoid floating 3896696777cSDuson Lin * point). 3906696777cSDuson Lin */ 39104d5ce62SJingle Wu return res * 10 / 254; 3926696777cSDuson Lin } 3936696777cSDuson Lin 3946696777cSDuson Lin static int elan_query_device_parameters(struct elan_tp_data *data) 3956696777cSDuson Lin { 396e3a9a129SBenjamin Tissoires struct i2c_client *client = data->client; 3976696777cSDuson Lin unsigned int x_traces, y_traces; 398e3a9a129SBenjamin Tissoires u32 x_mm, y_mm; 3996696777cSDuson Lin u8 hw_x_res, hw_y_res; 4006696777cSDuson Lin int error; 4016696777cSDuson Lin 402e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 403e3a9a129SBenjamin Tissoires "touchscreen-size-x", &data->max_x) || 404e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 405e3a9a129SBenjamin Tissoires "touchscreen-size-y", &data->max_y)) { 406e3a9a129SBenjamin Tissoires error = data->ops->get_max(data->client, 407e3a9a129SBenjamin Tissoires &data->max_x, 408e3a9a129SBenjamin Tissoires &data->max_y); 4096696777cSDuson Lin if (error) 4106696777cSDuson Lin return error; 411e3a9a129SBenjamin Tissoires } else { 412e3a9a129SBenjamin Tissoires /* size is the maximum + 1 */ 413e3a9a129SBenjamin Tissoires --data->max_x; 414e3a9a129SBenjamin Tissoires --data->max_y; 415e3a9a129SBenjamin Tissoires } 4166696777cSDuson Lin 417e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 418e3a9a129SBenjamin Tissoires "elan,x_traces", 419e3a9a129SBenjamin Tissoires &x_traces) || 420e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 421e3a9a129SBenjamin Tissoires "elan,y_traces", 422e3a9a129SBenjamin Tissoires &y_traces)) { 423e3a9a129SBenjamin Tissoires error = data->ops->get_num_traces(data->client, 424e3a9a129SBenjamin Tissoires &x_traces, &y_traces); 4256696777cSDuson Lin if (error) 4266696777cSDuson Lin return error; 427e3a9a129SBenjamin Tissoires } 4286696777cSDuson Lin data->width_x = data->max_x / x_traces; 4296696777cSDuson Lin data->width_y = data->max_y / y_traces; 4306696777cSDuson Lin 431e3a9a129SBenjamin Tissoires if (device_property_read_u32(&client->dev, 432e3a9a129SBenjamin Tissoires "touchscreen-x-mm", &x_mm) || 433e3a9a129SBenjamin Tissoires device_property_read_u32(&client->dev, 434e3a9a129SBenjamin Tissoires "touchscreen-y-mm", &y_mm)) { 435e3a9a129SBenjamin Tissoires error = data->ops->get_resolution(data->client, 436e3a9a129SBenjamin Tissoires &hw_x_res, &hw_y_res); 4376696777cSDuson Lin if (error) 4386696777cSDuson Lin return error; 4396696777cSDuson Lin 44004d5ce62SJingle Wu data->x_res = elan_convert_resolution(hw_x_res, data->pattern); 44104d5ce62SJingle Wu data->y_res = elan_convert_resolution(hw_y_res, data->pattern); 442e3a9a129SBenjamin Tissoires } else { 443e3a9a129SBenjamin Tissoires data->x_res = (data->max_x + 1) / x_mm; 444e3a9a129SBenjamin Tissoires data->y_res = (data->max_y + 1) / y_mm; 445e3a9a129SBenjamin Tissoires } 446e3a9a129SBenjamin Tissoires 447e3a9a129SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,clickpad")) 448e3a9a129SBenjamin Tissoires data->clickpad = 1; 4496696777cSDuson Lin 450140a7952SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,middle-button")) 451140a7952SBenjamin Tissoires data->middle_button = true; 452140a7952SBenjamin Tissoires 4536696777cSDuson Lin return 0; 4546696777cSDuson Lin } 4556696777cSDuson Lin 4566696777cSDuson Lin /* 4576696777cSDuson Lin ********************************************************** 4586696777cSDuson Lin * IAP firmware updater related routines 4596696777cSDuson Lin ********************************************************** 4606696777cSDuson Lin */ 461059d6c2dSJingle Wu static int elan_write_fw_block(struct elan_tp_data *data, u16 page_size, 4626696777cSDuson Lin const u8 *page, u16 checksum, int idx) 4636696777cSDuson Lin { 4646696777cSDuson Lin int retry = ETP_RETRY_COUNT; 4656696777cSDuson Lin int error; 4666696777cSDuson Lin 4676696777cSDuson Lin do { 468059d6c2dSJingle Wu error = data->ops->write_fw_block(data->client, page_size, 4696696777cSDuson Lin page, checksum, idx); 4706696777cSDuson Lin if (!error) 4716696777cSDuson Lin return 0; 4726696777cSDuson Lin 4736696777cSDuson Lin dev_dbg(&data->client->dev, 4746696777cSDuson Lin "IAP retrying page %d (error: %d)\n", idx, error); 4756696777cSDuson Lin } while (--retry > 0); 4766696777cSDuson Lin 4776696777cSDuson Lin return error; 4786696777cSDuson Lin } 4796696777cSDuson Lin 4806696777cSDuson Lin static int __elan_update_firmware(struct elan_tp_data *data, 4816696777cSDuson Lin const struct firmware *fw) 4826696777cSDuson Lin { 4836696777cSDuson Lin struct i2c_client *client = data->client; 4846696777cSDuson Lin struct device *dev = &client->dev; 4856696777cSDuson Lin int i, j; 4866696777cSDuson Lin int error; 4876696777cSDuson Lin u16 iap_start_addr; 4886696777cSDuson Lin u16 boot_page_count; 4896696777cSDuson Lin u16 sw_checksum = 0, fw_checksum = 0; 4906696777cSDuson Lin 491bfd9b92bSJingle Wu error = data->ops->prepare_fw_update(client, data->ic_type, 492ae3d6083Sjingle.wu data->iap_version, 493ae3d6083Sjingle.wu data->fw_page_size); 4946696777cSDuson Lin if (error) 4956696777cSDuson Lin return error; 4966696777cSDuson Lin 4976696777cSDuson Lin iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]); 4986696777cSDuson Lin 499059d6c2dSJingle Wu boot_page_count = (iap_start_addr * 2) / data->fw_page_size; 500742f452bSBenson Leung for (i = boot_page_count; i < data->fw_validpage_count; i++) { 5016696777cSDuson Lin u16 checksum = 0; 502059d6c2dSJingle Wu const u8 *page = &fw->data[i * data->fw_page_size]; 5036696777cSDuson Lin 504059d6c2dSJingle Wu for (j = 0; j < data->fw_page_size; j += 2) 5056696777cSDuson Lin checksum += ((page[j + 1] << 8) | page[j]); 5066696777cSDuson Lin 507059d6c2dSJingle Wu error = elan_write_fw_block(data, data->fw_page_size, 508059d6c2dSJingle Wu page, checksum, i); 5096696777cSDuson Lin if (error) { 5106696777cSDuson Lin dev_err(dev, "write page %d fail: %d\n", i, error); 5116696777cSDuson Lin return error; 5126696777cSDuson Lin } 5136696777cSDuson Lin 5146696777cSDuson Lin sw_checksum += checksum; 5156696777cSDuson Lin } 5166696777cSDuson Lin 5176696777cSDuson Lin /* Wait WDT reset and power on reset */ 5186696777cSDuson Lin msleep(600); 5196696777cSDuson Lin 5206696777cSDuson Lin error = data->ops->finish_fw_update(client, &data->fw_completion); 5216696777cSDuson Lin if (error) 5226696777cSDuson Lin return error; 5236696777cSDuson Lin 5246696777cSDuson Lin error = data->ops->get_checksum(client, true, &fw_checksum); 5256696777cSDuson Lin if (error) 5266696777cSDuson Lin return error; 5276696777cSDuson Lin 5286696777cSDuson Lin if (sw_checksum != fw_checksum) { 5296696777cSDuson Lin dev_err(dev, "checksum diff sw=[%04X], fw=[%04X]\n", 5306696777cSDuson Lin sw_checksum, fw_checksum); 5316696777cSDuson Lin return -EIO; 5326696777cSDuson Lin } 5336696777cSDuson Lin 5346696777cSDuson Lin return 0; 5356696777cSDuson Lin } 5366696777cSDuson Lin 5376696777cSDuson Lin static int elan_update_firmware(struct elan_tp_data *data, 5386696777cSDuson Lin const struct firmware *fw) 5396696777cSDuson Lin { 5406696777cSDuson Lin struct i2c_client *client = data->client; 5416696777cSDuson Lin int retval; 5426696777cSDuson Lin 5436696777cSDuson Lin dev_dbg(&client->dev, "Starting firmware update....\n"); 5446696777cSDuson Lin 5456696777cSDuson Lin disable_irq(client->irq); 5466696777cSDuson Lin data->in_fw_update = true; 5476696777cSDuson Lin 5486696777cSDuson Lin retval = __elan_update_firmware(data, fw); 5496696777cSDuson Lin if (retval) { 5506696777cSDuson Lin dev_err(&client->dev, "firmware update failed: %d\n", retval); 5516696777cSDuson Lin data->ops->iap_reset(client); 5526696777cSDuson Lin } else { 5536696777cSDuson Lin /* Reinitialize TP after fw is updated */ 554ea16ef96SJingle Wu elan_initialize(data, false); 5556696777cSDuson Lin elan_query_device_info(data); 5566696777cSDuson Lin } 5576696777cSDuson Lin 5586696777cSDuson Lin data->in_fw_update = false; 5596696777cSDuson Lin enable_irq(client->irq); 5606696777cSDuson Lin 5616696777cSDuson Lin return retval; 5626696777cSDuson Lin } 5636696777cSDuson Lin 5646696777cSDuson Lin /* 5656696777cSDuson Lin ******************************************************************* 5666696777cSDuson Lin * SYSFS attributes 5676696777cSDuson Lin ******************************************************************* 5686696777cSDuson Lin */ 5696696777cSDuson Lin static ssize_t elan_sysfs_read_fw_checksum(struct device *dev, 5706696777cSDuson Lin struct device_attribute *attr, 5716696777cSDuson Lin char *buf) 5726696777cSDuson Lin { 5736696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5746696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5756696777cSDuson Lin 5766696777cSDuson Lin return sprintf(buf, "0x%04x\n", data->fw_checksum); 5776696777cSDuson Lin } 5786696777cSDuson Lin 5796696777cSDuson Lin static ssize_t elan_sysfs_read_product_id(struct device *dev, 5806696777cSDuson Lin struct device_attribute *attr, 5816696777cSDuson Lin char *buf) 5826696777cSDuson Lin { 5836696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5846696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5856696777cSDuson Lin 5867b9f1830SCharlie Mooney return sprintf(buf, ETP_PRODUCT_ID_FORMAT_STRING "\n", 5877b9f1830SCharlie Mooney data->product_id); 5886696777cSDuson Lin } 5896696777cSDuson Lin 5906696777cSDuson Lin static ssize_t elan_sysfs_read_fw_ver(struct device *dev, 5916696777cSDuson Lin struct device_attribute *attr, 5926696777cSDuson Lin char *buf) 5936696777cSDuson Lin { 5946696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 5956696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 5966696777cSDuson Lin 5976696777cSDuson Lin return sprintf(buf, "%d.0\n", data->fw_version); 5986696777cSDuson Lin } 5996696777cSDuson Lin 6006696777cSDuson Lin static ssize_t elan_sysfs_read_sm_ver(struct device *dev, 6016696777cSDuson Lin struct device_attribute *attr, 6026696777cSDuson Lin char *buf) 6036696777cSDuson Lin { 6046696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6056696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6066696777cSDuson Lin 6076696777cSDuson Lin return sprintf(buf, "%d.0\n", data->sm_version); 6086696777cSDuson Lin } 6096696777cSDuson Lin 6106696777cSDuson Lin static ssize_t elan_sysfs_read_iap_ver(struct device *dev, 6116696777cSDuson Lin struct device_attribute *attr, 6126696777cSDuson Lin char *buf) 6136696777cSDuson Lin { 6146696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6156696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6166696777cSDuson Lin 6176696777cSDuson Lin return sprintf(buf, "%d.0\n", data->iap_version); 6186696777cSDuson Lin } 6196696777cSDuson Lin 6206696777cSDuson Lin static ssize_t elan_sysfs_update_fw(struct device *dev, 6216696777cSDuson Lin struct device_attribute *attr, 6226696777cSDuson Lin const char *buf, size_t count) 6236696777cSDuson Lin { 624bb03bf3fSDuson Lin struct elan_tp_data *data = dev_get_drvdata(dev); 6256696777cSDuson Lin const struct firmware *fw; 6267b9f1830SCharlie Mooney char *fw_name; 6276696777cSDuson Lin int error; 628bb03bf3fSDuson Lin const u8 *fw_signature; 629bb03bf3fSDuson Lin static const u8 signature[] = {0xAA, 0x55, 0xCC, 0x33, 0xFF, 0xFF}; 6306696777cSDuson Lin 6319d7b03f8SDaniel Drake if (data->fw_validpage_count == 0) 6329d7b03f8SDaniel Drake return -EINVAL; 6339d7b03f8SDaniel Drake 6347b9f1830SCharlie Mooney /* Look for a firmware with the product id appended. */ 6357b9f1830SCharlie Mooney fw_name = kasprintf(GFP_KERNEL, ETP_FW_NAME, data->product_id); 6367b9f1830SCharlie Mooney if (!fw_name) { 6377b9f1830SCharlie Mooney dev_err(dev, "failed to allocate memory for firmware name\n"); 6387b9f1830SCharlie Mooney return -ENOMEM; 6397b9f1830SCharlie Mooney } 6407b9f1830SCharlie Mooney 6417b9f1830SCharlie Mooney dev_info(dev, "requesting fw '%s'\n", fw_name); 6427b9f1830SCharlie Mooney error = request_firmware(&fw, fw_name, dev); 6437b9f1830SCharlie Mooney kfree(fw_name); 6446696777cSDuson Lin if (error) { 6457b9f1830SCharlie Mooney dev_err(dev, "failed to request firmware: %d\n", error); 6466696777cSDuson Lin return error; 6476696777cSDuson Lin } 6486696777cSDuson Lin 649bb03bf3fSDuson Lin /* Firmware file must match signature data */ 65012018ac3SDuson Lin fw_signature = &fw->data[data->fw_signature_address]; 651bb03bf3fSDuson Lin if (memcmp(fw_signature, signature, sizeof(signature)) != 0) { 652bb03bf3fSDuson Lin dev_err(dev, "signature mismatch (expected %*ph, got %*ph)\n", 653bb03bf3fSDuson Lin (int)sizeof(signature), signature, 654bb03bf3fSDuson Lin (int)sizeof(signature), fw_signature); 6556696777cSDuson Lin error = -EBADF; 6566696777cSDuson Lin goto out_release_fw; 6576696777cSDuson Lin } 6586696777cSDuson Lin 6596696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 6606696777cSDuson Lin if (error) 6616696777cSDuson Lin goto out_release_fw; 6626696777cSDuson Lin 6636696777cSDuson Lin error = elan_update_firmware(data, fw); 6646696777cSDuson Lin 6656696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 6666696777cSDuson Lin 6676696777cSDuson Lin out_release_fw: 6686696777cSDuson Lin release_firmware(fw); 6696696777cSDuson Lin return error ?: count; 6706696777cSDuson Lin } 6716696777cSDuson Lin 6726696777cSDuson Lin static ssize_t calibrate_store(struct device *dev, 6736696777cSDuson Lin struct device_attribute *attr, 6746696777cSDuson Lin const char *buf, size_t count) 6756696777cSDuson Lin { 6766696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 6776696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 6786696777cSDuson Lin int tries = 20; 6796696777cSDuson Lin int retval; 6806696777cSDuson Lin int error; 68150fc7b61SBen Hutchings u8 val[ETP_CALIBRATE_MAX_LEN]; 6826696777cSDuson Lin 6836696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 6846696777cSDuson Lin if (retval) 6856696777cSDuson Lin return retval; 6866696777cSDuson Lin 6876696777cSDuson Lin disable_irq(client->irq); 6886696777cSDuson Lin 6896696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 6906696777cSDuson Lin retval = data->ops->set_mode(client, data->mode); 6916696777cSDuson Lin if (retval) { 6926696777cSDuson Lin dev_err(dev, "failed to enable calibration mode: %d\n", 6936696777cSDuson Lin retval); 6946696777cSDuson Lin goto out; 6956696777cSDuson Lin } 6966696777cSDuson Lin 6976696777cSDuson Lin retval = data->ops->calibrate(client); 6986696777cSDuson Lin if (retval) { 6996696777cSDuson Lin dev_err(dev, "failed to start calibration: %d\n", 7006696777cSDuson Lin retval); 7016696777cSDuson Lin goto out_disable_calibrate; 7026696777cSDuson Lin } 7036696777cSDuson Lin 7046696777cSDuson Lin val[0] = 0xff; 7056696777cSDuson Lin do { 7066696777cSDuson Lin /* Wait 250ms before checking if calibration has completed. */ 7076696777cSDuson Lin msleep(250); 7086696777cSDuson Lin 7096696777cSDuson Lin retval = data->ops->calibrate_result(client, val); 7106696777cSDuson Lin if (retval) 7116696777cSDuson Lin dev_err(dev, "failed to check calibration result: %d\n", 7126696777cSDuson Lin retval); 7136696777cSDuson Lin else if (val[0] == 0) 7146696777cSDuson Lin break; /* calibration done */ 7156696777cSDuson Lin 7166696777cSDuson Lin } while (--tries); 7176696777cSDuson Lin 7186696777cSDuson Lin if (tries == 0) { 7196696777cSDuson Lin dev_err(dev, "failed to calibrate. Timeout.\n"); 7206696777cSDuson Lin retval = -ETIMEDOUT; 7216696777cSDuson Lin } 7226696777cSDuson Lin 7236696777cSDuson Lin out_disable_calibrate: 7246696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 7256696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 7266696777cSDuson Lin if (error) { 7276696777cSDuson Lin dev_err(dev, "failed to disable calibration mode: %d\n", 7286696777cSDuson Lin error); 7296696777cSDuson Lin if (!retval) 7306696777cSDuson Lin retval = error; 7316696777cSDuson Lin } 7326696777cSDuson Lin out: 7336696777cSDuson Lin enable_irq(client->irq); 7346696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7356696777cSDuson Lin return retval ?: count; 7366696777cSDuson Lin } 7376696777cSDuson Lin 7386696777cSDuson Lin static ssize_t elan_sysfs_read_mode(struct device *dev, 7396696777cSDuson Lin struct device_attribute *attr, 7406696777cSDuson Lin char *buf) 7416696777cSDuson Lin { 7426696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7436696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7446696777cSDuson Lin int error; 7456696777cSDuson Lin enum tp_mode mode; 7466696777cSDuson Lin 7476696777cSDuson Lin error = mutex_lock_interruptible(&data->sysfs_mutex); 7486696777cSDuson Lin if (error) 7496696777cSDuson Lin return error; 7506696777cSDuson Lin 7516696777cSDuson Lin error = data->ops->iap_get_mode(data->client, &mode); 7526696777cSDuson Lin 7536696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 7546696777cSDuson Lin 7556696777cSDuson Lin if (error) 7566696777cSDuson Lin return error; 7576696777cSDuson Lin 7586696777cSDuson Lin return sprintf(buf, "%d\n", (int)mode); 7596696777cSDuson Lin } 7606696777cSDuson Lin 7616696777cSDuson Lin static DEVICE_ATTR(product_id, S_IRUGO, elan_sysfs_read_product_id, NULL); 7626696777cSDuson Lin static DEVICE_ATTR(firmware_version, S_IRUGO, elan_sysfs_read_fw_ver, NULL); 7636696777cSDuson Lin static DEVICE_ATTR(sample_version, S_IRUGO, elan_sysfs_read_sm_ver, NULL); 7646696777cSDuson Lin static DEVICE_ATTR(iap_version, S_IRUGO, elan_sysfs_read_iap_ver, NULL); 7656696777cSDuson Lin static DEVICE_ATTR(fw_checksum, S_IRUGO, elan_sysfs_read_fw_checksum, NULL); 7666696777cSDuson Lin static DEVICE_ATTR(mode, S_IRUGO, elan_sysfs_read_mode, NULL); 7676696777cSDuson Lin static DEVICE_ATTR(update_fw, S_IWUSR, NULL, elan_sysfs_update_fw); 7686696777cSDuson Lin 7696696777cSDuson Lin static DEVICE_ATTR_WO(calibrate); 7706696777cSDuson Lin 7716696777cSDuson Lin static struct attribute *elan_sysfs_entries[] = { 7726696777cSDuson Lin &dev_attr_product_id.attr, 7736696777cSDuson Lin &dev_attr_firmware_version.attr, 7746696777cSDuson Lin &dev_attr_sample_version.attr, 7756696777cSDuson Lin &dev_attr_iap_version.attr, 7766696777cSDuson Lin &dev_attr_fw_checksum.attr, 7776696777cSDuson Lin &dev_attr_calibrate.attr, 7786696777cSDuson Lin &dev_attr_mode.attr, 7796696777cSDuson Lin &dev_attr_update_fw.attr, 7806696777cSDuson Lin NULL, 7816696777cSDuson Lin }; 7826696777cSDuson Lin 7836696777cSDuson Lin static const struct attribute_group elan_sysfs_group = { 7846696777cSDuson Lin .attrs = elan_sysfs_entries, 7856696777cSDuson Lin }; 7866696777cSDuson Lin 7876696777cSDuson Lin static ssize_t acquire_store(struct device *dev, struct device_attribute *attr, 7886696777cSDuson Lin const char *buf, size_t count) 7896696777cSDuson Lin { 7906696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 7916696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 7926696777cSDuson Lin int error; 7936696777cSDuson Lin int retval; 7946696777cSDuson Lin 7956696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 7966696777cSDuson Lin if (retval) 7976696777cSDuson Lin return retval; 7986696777cSDuson Lin 7996696777cSDuson Lin disable_irq(client->irq); 8006696777cSDuson Lin 8016696777cSDuson Lin data->baseline_ready = false; 8026696777cSDuson Lin 8036696777cSDuson Lin data->mode |= ETP_ENABLE_CALIBRATE; 8046696777cSDuson Lin retval = data->ops->set_mode(data->client, data->mode); 8056696777cSDuson Lin if (retval) { 8066696777cSDuson Lin dev_err(dev, "Failed to enable calibration mode to get baseline: %d\n", 8076696777cSDuson Lin retval); 8086696777cSDuson Lin goto out; 8096696777cSDuson Lin } 8106696777cSDuson Lin 8116696777cSDuson Lin msleep(250); 8126696777cSDuson Lin 8136696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, true, 8146696777cSDuson Lin &data->max_baseline); 8156696777cSDuson Lin if (retval) { 8166696777cSDuson Lin dev_err(dev, "Failed to read max baseline form device: %d\n", 8176696777cSDuson Lin retval); 8186696777cSDuson Lin goto out_disable_calibrate; 8196696777cSDuson Lin } 8206696777cSDuson Lin 8216696777cSDuson Lin retval = data->ops->get_baseline_data(data->client, false, 8226696777cSDuson Lin &data->min_baseline); 8236696777cSDuson Lin if (retval) { 8246696777cSDuson Lin dev_err(dev, "Failed to read min baseline form device: %d\n", 8256696777cSDuson Lin retval); 8266696777cSDuson Lin goto out_disable_calibrate; 8276696777cSDuson Lin } 8286696777cSDuson Lin 8296696777cSDuson Lin data->baseline_ready = true; 8306696777cSDuson Lin 8316696777cSDuson Lin out_disable_calibrate: 8326696777cSDuson Lin data->mode &= ~ETP_ENABLE_CALIBRATE; 8336696777cSDuson Lin error = data->ops->set_mode(data->client, data->mode); 8346696777cSDuson Lin if (error) { 8356696777cSDuson Lin dev_err(dev, "Failed to disable calibration mode after acquiring baseline: %d\n", 8366696777cSDuson Lin error); 8376696777cSDuson Lin if (!retval) 8386696777cSDuson Lin retval = error; 8396696777cSDuson Lin } 8406696777cSDuson Lin out: 8416696777cSDuson Lin enable_irq(client->irq); 8426696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8436696777cSDuson Lin return retval ?: count; 8446696777cSDuson Lin } 8456696777cSDuson Lin 8466696777cSDuson Lin static ssize_t min_show(struct device *dev, 8476696777cSDuson Lin struct device_attribute *attr, char *buf) 8486696777cSDuson Lin { 8496696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 8506696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 8516696777cSDuson Lin int retval; 8526696777cSDuson Lin 8536696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8546696777cSDuson Lin if (retval) 8556696777cSDuson Lin return retval; 8566696777cSDuson Lin 8576696777cSDuson Lin if (!data->baseline_ready) { 8586696777cSDuson Lin retval = -ENODATA; 8596696777cSDuson Lin goto out; 8606696777cSDuson Lin } 8616696777cSDuson Lin 8626696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->min_baseline); 8636696777cSDuson Lin 8646696777cSDuson Lin out: 8656696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8666696777cSDuson Lin return retval; 8676696777cSDuson Lin } 8686696777cSDuson Lin 8696696777cSDuson Lin static ssize_t max_show(struct device *dev, 8706696777cSDuson Lin struct device_attribute *attr, char *buf) 8716696777cSDuson Lin { 8726696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 8736696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 8746696777cSDuson Lin int retval; 8756696777cSDuson Lin 8766696777cSDuson Lin retval = mutex_lock_interruptible(&data->sysfs_mutex); 8776696777cSDuson Lin if (retval) 8786696777cSDuson Lin return retval; 8796696777cSDuson Lin 8806696777cSDuson Lin if (!data->baseline_ready) { 8816696777cSDuson Lin retval = -ENODATA; 8826696777cSDuson Lin goto out; 8836696777cSDuson Lin } 8846696777cSDuson Lin 8856696777cSDuson Lin retval = snprintf(buf, PAGE_SIZE, "%d", data->max_baseline); 8866696777cSDuson Lin 8876696777cSDuson Lin out: 8886696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 8896696777cSDuson Lin return retval; 8906696777cSDuson Lin } 8916696777cSDuson Lin 8926696777cSDuson Lin 8936696777cSDuson Lin static DEVICE_ATTR_WO(acquire); 8946696777cSDuson Lin static DEVICE_ATTR_RO(min); 8956696777cSDuson Lin static DEVICE_ATTR_RO(max); 8966696777cSDuson Lin 8976696777cSDuson Lin static struct attribute *elan_baseline_sysfs_entries[] = { 8986696777cSDuson Lin &dev_attr_acquire.attr, 8996696777cSDuson Lin &dev_attr_min.attr, 9006696777cSDuson Lin &dev_attr_max.attr, 9016696777cSDuson Lin NULL, 9026696777cSDuson Lin }; 9036696777cSDuson Lin 9046696777cSDuson Lin static const struct attribute_group elan_baseline_sysfs_group = { 9056696777cSDuson Lin .name = "baseline", 9066696777cSDuson Lin .attrs = elan_baseline_sysfs_entries, 9076696777cSDuson Lin }; 9086696777cSDuson Lin 9096696777cSDuson Lin static const struct attribute_group *elan_sysfs_groups[] = { 9106696777cSDuson Lin &elan_sysfs_group, 9116696777cSDuson Lin &elan_baseline_sysfs_group, 9126696777cSDuson Lin NULL 9136696777cSDuson Lin }; 9146696777cSDuson Lin 9156696777cSDuson Lin /* 9166696777cSDuson Lin ****************************************************************** 9176696777cSDuson Lin * Elan isr functions 9186696777cSDuson Lin ****************************************************************** 9196696777cSDuson Lin */ 92004d5ce62SJingle Wu static void elan_report_contact(struct elan_tp_data *data, int contact_num, 92104d5ce62SJingle Wu bool contact_valid, bool high_precision, 92204d5ce62SJingle Wu u8 *packet, u8 *finger_data) 9236696777cSDuson Lin { 9246696777cSDuson Lin struct input_dev *input = data->input; 9256696777cSDuson Lin unsigned int pos_x, pos_y; 92604d5ce62SJingle Wu unsigned int pressure, scaled_pressure; 9276696777cSDuson Lin 9286696777cSDuson Lin if (contact_valid) { 92904d5ce62SJingle Wu if (high_precision) { 93004d5ce62SJingle Wu pos_x = get_unaligned_be16(&finger_data[0]); 93104d5ce62SJingle Wu pos_y = get_unaligned_be16(&finger_data[2]); 93204d5ce62SJingle Wu } else { 93304d5ce62SJingle Wu pos_x = ((finger_data[0] & 0xf0) << 4) | finger_data[1]; 93404d5ce62SJingle Wu pos_y = ((finger_data[0] & 0x0f) << 8) | finger_data[2]; 93504d5ce62SJingle Wu } 9366696777cSDuson Lin 9376696777cSDuson Lin if (pos_x > data->max_x || pos_y > data->max_y) { 9386696777cSDuson Lin dev_dbg(input->dev.parent, 9396696777cSDuson Lin "[%d] x=%d y=%d over max (%d, %d)", 9406696777cSDuson Lin contact_num, pos_x, pos_y, 9416696777cSDuson Lin data->max_x, data->max_y); 9426696777cSDuson Lin return; 9436696777cSDuson Lin } 9446696777cSDuson Lin 94504d5ce62SJingle Wu pressure = finger_data[4]; 946b9bced0eSduson scaled_pressure = pressure + data->pressure_adjustment; 947b9bced0eSduson if (scaled_pressure > ETP_MAX_PRESSURE) 948b9bced0eSduson scaled_pressure = ETP_MAX_PRESSURE; 9496696777cSDuson Lin 9506696777cSDuson Lin input_mt_slot(input, contact_num); 9516696777cSDuson Lin input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 9526696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_X, pos_x); 9536696777cSDuson Lin input_report_abs(input, ABS_MT_POSITION_Y, data->max_y - pos_y); 954539c4b88Sduson input_report_abs(input, ABS_MT_PRESSURE, scaled_pressure); 95504d5ce62SJingle Wu 95604d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) { 95704d5ce62SJingle Wu unsigned int mk_x, mk_y, area_x, area_y; 95804d5ce62SJingle Wu u8 mk_data = high_precision ? 95904d5ce62SJingle Wu packet[ETP_MK_DATA_OFFSET + contact_num] : 96004d5ce62SJingle Wu finger_data[3]; 96104d5ce62SJingle Wu 96204d5ce62SJingle Wu mk_x = mk_data & 0x0f; 96304d5ce62SJingle Wu mk_y = mk_data >> 4; 96404d5ce62SJingle Wu 96504d5ce62SJingle Wu /* 96604d5ce62SJingle Wu * To avoid treating large finger as palm, let's reduce 96704d5ce62SJingle Wu * the width x and y per trace. 96804d5ce62SJingle Wu */ 96904d5ce62SJingle Wu area_x = mk_x * (data->width_x - ETP_FWIDTH_REDUCE); 97004d5ce62SJingle Wu area_y = mk_y * (data->width_y - ETP_FWIDTH_REDUCE); 97104d5ce62SJingle Wu 9726696777cSDuson Lin input_report_abs(input, ABS_TOOL_WIDTH, mk_x); 97304d5ce62SJingle Wu input_report_abs(input, ABS_MT_TOUCH_MAJOR, 97404d5ce62SJingle Wu max(area_x, area_y)); 97504d5ce62SJingle Wu input_report_abs(input, ABS_MT_TOUCH_MINOR, 97604d5ce62SJingle Wu min(area_x, area_y)); 97704d5ce62SJingle Wu } 9786696777cSDuson Lin } else { 9796696777cSDuson Lin input_mt_slot(input, contact_num); 9805fc70e35SJiada Wang input_mt_report_slot_inactive(input); 9816696777cSDuson Lin } 9826696777cSDuson Lin } 9836696777cSDuson Lin 98404d5ce62SJingle Wu static void elan_report_absolute(struct elan_tp_data *data, u8 *packet, 98504d5ce62SJingle Wu bool high_precision) 9866696777cSDuson Lin { 9876696777cSDuson Lin struct input_dev *input = data->input; 9886696777cSDuson Lin u8 *finger_data = &packet[ETP_FINGER_DATA_OFFSET]; 9896696777cSDuson Lin int i; 9906696777cSDuson Lin u8 tp_info = packet[ETP_TOUCH_INFO_OFFSET]; 991090ad325SDuson Lin u8 hover_info = packet[ETP_HOVER_INFO_OFFSET]; 992090ad325SDuson Lin bool contact_valid, hover_event; 9936696777cSDuson Lin 994966334dfSDerek Basehore pm_wakeup_event(&data->client->dev, 0); 995966334dfSDerek Basehore 99604d5ce62SJingle Wu hover_event = hover_info & BIT(6); 9976696777cSDuson Lin 99804d5ce62SJingle Wu for (i = 0; i < ETP_MAX_FINGERS; i++) { 99904d5ce62SJingle Wu contact_valid = tp_info & BIT(3 + i); 100004d5ce62SJingle Wu elan_report_contact(data, i, contact_valid, high_precision, 100104d5ce62SJingle Wu packet, finger_data); 10026696777cSDuson Lin if (contact_valid) 10036696777cSDuson Lin finger_data += ETP_FINGER_DATA_LEN; 10046696777cSDuson Lin } 10056696777cSDuson Lin 1006140a7952SBenjamin Tissoires input_report_key(input, BTN_LEFT, tp_info & BIT(0)); 1007140a7952SBenjamin Tissoires input_report_key(input, BTN_MIDDLE, tp_info & BIT(2)); 1008140a7952SBenjamin Tissoires input_report_key(input, BTN_RIGHT, tp_info & BIT(1)); 1009539c4b88Sduson input_report_abs(input, ABS_DISTANCE, hover_event != 0); 10106696777cSDuson Lin input_mt_report_pointer_emulation(input, true); 10116696777cSDuson Lin input_sync(input); 10126696777cSDuson Lin } 10136696777cSDuson Lin 1014559b3df7SBenjamin Tissoires static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report) 1015559b3df7SBenjamin Tissoires { 1016559b3df7SBenjamin Tissoires struct input_dev *input = data->tp_input; 1017559b3df7SBenjamin Tissoires u8 *packet = &report[ETP_REPORT_ID_OFFSET + 1]; 1018559b3df7SBenjamin Tissoires int x, y; 1019559b3df7SBenjamin Tissoires 1020966334dfSDerek Basehore pm_wakeup_event(&data->client->dev, 0); 1021966334dfSDerek Basehore 1022559b3df7SBenjamin Tissoires if (!data->tp_input) { 1023559b3df7SBenjamin Tissoires dev_warn_once(&data->client->dev, 1024559b3df7SBenjamin Tissoires "received a trackpoint report while no trackpoint device has been created. Please report upstream.\n"); 1025559b3df7SBenjamin Tissoires return; 1026559b3df7SBenjamin Tissoires } 1027559b3df7SBenjamin Tissoires 1028559b3df7SBenjamin Tissoires input_report_key(input, BTN_LEFT, packet[0] & 0x01); 1029559b3df7SBenjamin Tissoires input_report_key(input, BTN_RIGHT, packet[0] & 0x02); 1030559b3df7SBenjamin Tissoires input_report_key(input, BTN_MIDDLE, packet[0] & 0x04); 1031559b3df7SBenjamin Tissoires 1032559b3df7SBenjamin Tissoires if ((packet[3] & 0x0F) == 0x06) { 1033559b3df7SBenjamin Tissoires x = packet[4] - (int)((packet[1] ^ 0x80) << 1); 1034559b3df7SBenjamin Tissoires y = (int)((packet[2] ^ 0x80) << 1) - packet[5]; 1035559b3df7SBenjamin Tissoires 1036559b3df7SBenjamin Tissoires input_report_rel(input, REL_X, x); 1037559b3df7SBenjamin Tissoires input_report_rel(input, REL_Y, y); 1038559b3df7SBenjamin Tissoires } 1039559b3df7SBenjamin Tissoires 1040559b3df7SBenjamin Tissoires input_sync(input); 1041559b3df7SBenjamin Tissoires } 1042559b3df7SBenjamin Tissoires 10436696777cSDuson Lin static irqreturn_t elan_isr(int irq, void *dev_id) 10446696777cSDuson Lin { 10456696777cSDuson Lin struct elan_tp_data *data = dev_id; 10466696777cSDuson Lin int error; 10476696777cSDuson Lin u8 report[ETP_MAX_REPORT_LEN]; 10486696777cSDuson Lin 10496696777cSDuson Lin /* 10506696777cSDuson Lin * When device is connected to i2c bus, when all IAP page writes 10516696777cSDuson Lin * complete, the driver will receive interrupt and must read 10526696777cSDuson Lin * 0000 to confirm that IAP is finished. 10536696777cSDuson Lin */ 10546696777cSDuson Lin if (data->in_fw_update) { 10556696777cSDuson Lin complete(&data->fw_completion); 10566696777cSDuson Lin goto out; 10576696777cSDuson Lin } 10586696777cSDuson Lin 105904d5ce62SJingle Wu error = data->ops->get_report(data->client, report, data->report_len); 10606696777cSDuson Lin if (error) 10616696777cSDuson Lin goto out; 10626696777cSDuson Lin 1063559b3df7SBenjamin Tissoires switch (report[ETP_REPORT_ID_OFFSET]) { 1064559b3df7SBenjamin Tissoires case ETP_REPORT_ID: 106504d5ce62SJingle Wu elan_report_absolute(data, report, false); 106604d5ce62SJingle Wu break; 106704d5ce62SJingle Wu case ETP_REPORT_ID2: 106804d5ce62SJingle Wu elan_report_absolute(data, report, true); 1069559b3df7SBenjamin Tissoires break; 1070559b3df7SBenjamin Tissoires case ETP_TP_REPORT_ID: 1071056115daSJingle Wu case ETP_TP_REPORT_ID2: 1072559b3df7SBenjamin Tissoires elan_report_trackpoint(data, report); 1073559b3df7SBenjamin Tissoires break; 1074559b3df7SBenjamin Tissoires default: 1075966334dfSDerek Basehore dev_err(&data->client->dev, "invalid report id data (%x)\n", 10766696777cSDuson Lin report[ETP_REPORT_ID_OFFSET]); 1077559b3df7SBenjamin Tissoires } 10786696777cSDuson Lin 10796696777cSDuson Lin out: 10806696777cSDuson Lin return IRQ_HANDLED; 10816696777cSDuson Lin } 10826696777cSDuson Lin 10836696777cSDuson Lin /* 10846696777cSDuson Lin ****************************************************************** 10856696777cSDuson Lin * Elan initialization functions 10866696777cSDuson Lin ****************************************************************** 10876696777cSDuson Lin */ 1088559b3df7SBenjamin Tissoires 1089559b3df7SBenjamin Tissoires static int elan_setup_trackpoint_input_device(struct elan_tp_data *data) 1090559b3df7SBenjamin Tissoires { 1091559b3df7SBenjamin Tissoires struct device *dev = &data->client->dev; 1092559b3df7SBenjamin Tissoires struct input_dev *input; 1093559b3df7SBenjamin Tissoires 1094559b3df7SBenjamin Tissoires input = devm_input_allocate_device(dev); 1095559b3df7SBenjamin Tissoires if (!input) 1096559b3df7SBenjamin Tissoires return -ENOMEM; 1097559b3df7SBenjamin Tissoires 1098559b3df7SBenjamin Tissoires input->name = "Elan TrackPoint"; 1099559b3df7SBenjamin Tissoires input->id.bustype = BUS_I2C; 1100559b3df7SBenjamin Tissoires input->id.vendor = ELAN_VENDOR_ID; 1101559b3df7SBenjamin Tissoires input->id.product = data->product_id; 1102559b3df7SBenjamin Tissoires input_set_drvdata(input, data); 1103559b3df7SBenjamin Tissoires 1104559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_X); 1105559b3df7SBenjamin Tissoires input_set_capability(input, EV_REL, REL_Y); 1106559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_LEFT); 1107559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_RIGHT); 1108559b3df7SBenjamin Tissoires input_set_capability(input, EV_KEY, BTN_MIDDLE); 1109559b3df7SBenjamin Tissoires 1110559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTER, input->propbit); 1111559b3df7SBenjamin Tissoires __set_bit(INPUT_PROP_POINTING_STICK, input->propbit); 1112559b3df7SBenjamin Tissoires 1113559b3df7SBenjamin Tissoires data->tp_input = input; 1114559b3df7SBenjamin Tissoires 1115559b3df7SBenjamin Tissoires return 0; 1116559b3df7SBenjamin Tissoires } 1117559b3df7SBenjamin Tissoires 11186696777cSDuson Lin static int elan_setup_input_device(struct elan_tp_data *data) 11196696777cSDuson Lin { 11206696777cSDuson Lin struct device *dev = &data->client->dev; 11216696777cSDuson Lin struct input_dev *input; 11226696777cSDuson Lin unsigned int max_width = max(data->width_x, data->width_y); 11236696777cSDuson Lin unsigned int min_width = min(data->width_x, data->width_y); 11246696777cSDuson Lin int error; 11256696777cSDuson Lin 11266696777cSDuson Lin input = devm_input_allocate_device(dev); 11276696777cSDuson Lin if (!input) 11286696777cSDuson Lin return -ENOMEM; 11296696777cSDuson Lin 11306696777cSDuson Lin input->name = "Elan Touchpad"; 11316696777cSDuson Lin input->id.bustype = BUS_I2C; 11323eab4588SCharlie Mooney input->id.vendor = ELAN_VENDOR_ID; 11333eab4588SCharlie Mooney input->id.product = data->product_id; 11346696777cSDuson Lin input_set_drvdata(input, data); 11356696777cSDuson Lin 11366696777cSDuson Lin error = input_mt_init_slots(input, ETP_MAX_FINGERS, 11376696777cSDuson Lin INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 11386696777cSDuson Lin if (error) { 11396696777cSDuson Lin dev_err(dev, "failed to initialize MT slots: %d\n", error); 11406696777cSDuson Lin return error; 11416696777cSDuson Lin } 11426696777cSDuson Lin 11436696777cSDuson Lin __set_bit(EV_ABS, input->evbit); 11446696777cSDuson Lin __set_bit(INPUT_PROP_POINTER, input->propbit); 1145140a7952SBenjamin Tissoires if (data->clickpad) { 11466696777cSDuson Lin __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 1147140a7952SBenjamin Tissoires } else { 114899136881SKT Liao __set_bit(BTN_RIGHT, input->keybit); 1149140a7952SBenjamin Tissoires if (data->middle_button) 1150140a7952SBenjamin Tissoires __set_bit(BTN_MIDDLE, input->keybit); 1151140a7952SBenjamin Tissoires } 11526696777cSDuson Lin __set_bit(BTN_LEFT, input->keybit); 11536696777cSDuson Lin 11546696777cSDuson Lin /* Set up ST parameters */ 11556696777cSDuson Lin input_set_abs_params(input, ABS_X, 0, data->max_x, 0, 0); 11566696777cSDuson Lin input_set_abs_params(input, ABS_Y, 0, data->max_y, 0, 0); 11576696777cSDuson Lin input_abs_set_res(input, ABS_X, data->x_res); 11586696777cSDuson Lin input_abs_set_res(input, ABS_Y, data->y_res); 11596696777cSDuson Lin input_set_abs_params(input, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0); 116004d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) 116104d5ce62SJingle Wu input_set_abs_params(input, ABS_TOOL_WIDTH, 116204d5ce62SJingle Wu 0, ETP_FINGER_WIDTH, 0, 0); 1163539c4b88Sduson input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 11646696777cSDuson Lin 11656696777cSDuson Lin /* And MT parameters */ 11666696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); 11676696777cSDuson Lin input_set_abs_params(input, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); 11686696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_X, data->x_res); 11696696777cSDuson Lin input_abs_set_res(input, ABS_MT_POSITION_Y, data->y_res); 11706696777cSDuson Lin input_set_abs_params(input, ABS_MT_PRESSURE, 0, 11716696777cSDuson Lin ETP_MAX_PRESSURE, 0, 0); 117204d5ce62SJingle Wu if (data->report_features & ETP_FEATURE_REPORT_MK) { 117304d5ce62SJingle Wu input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 117404d5ce62SJingle Wu 0, ETP_FINGER_WIDTH * max_width, 0, 0); 117504d5ce62SJingle Wu input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 117604d5ce62SJingle Wu 0, ETP_FINGER_WIDTH * min_width, 0, 0); 117704d5ce62SJingle Wu } 11786696777cSDuson Lin 11796696777cSDuson Lin data->input = input; 11806696777cSDuson Lin 11816696777cSDuson Lin return 0; 11826696777cSDuson Lin } 11836696777cSDuson Lin 11846696777cSDuson Lin static void elan_disable_regulator(void *_data) 11856696777cSDuson Lin { 11866696777cSDuson Lin struct elan_tp_data *data = _data; 11876696777cSDuson Lin 11886696777cSDuson Lin regulator_disable(data->vcc); 11896696777cSDuson Lin } 11906696777cSDuson Lin 11916696777cSDuson Lin static int elan_probe(struct i2c_client *client, 11926696777cSDuson Lin const struct i2c_device_id *dev_id) 11936696777cSDuson Lin { 11946696777cSDuson Lin const struct elan_transport_ops *transport_ops; 11956696777cSDuson Lin struct device *dev = &client->dev; 11966696777cSDuson Lin struct elan_tp_data *data; 11976696777cSDuson Lin unsigned long irqflags; 11986696777cSDuson Lin int error; 11996696777cSDuson Lin 12006696777cSDuson Lin if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_I2C) && 12016696777cSDuson Lin i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 12026696777cSDuson Lin transport_ops = &elan_i2c_ops; 12036696777cSDuson Lin } else if (IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) && 12046696777cSDuson Lin i2c_check_functionality(client->adapter, 12056696777cSDuson Lin I2C_FUNC_SMBUS_BYTE_DATA | 12066696777cSDuson Lin I2C_FUNC_SMBUS_BLOCK_DATA | 12076696777cSDuson Lin I2C_FUNC_SMBUS_I2C_BLOCK)) { 12086696777cSDuson Lin transport_ops = &elan_smbus_ops; 12096696777cSDuson Lin } else { 12106696777cSDuson Lin dev_err(dev, "not a supported I2C/SMBus adapter\n"); 12116696777cSDuson Lin return -EIO; 12126696777cSDuson Lin } 12136696777cSDuson Lin 1214ad56814fSGuenter Roeck data = devm_kzalloc(dev, sizeof(struct elan_tp_data), GFP_KERNEL); 12156696777cSDuson Lin if (!data) 12166696777cSDuson Lin return -ENOMEM; 12176696777cSDuson Lin 12186696777cSDuson Lin i2c_set_clientdata(client, data); 12196696777cSDuson Lin 12206696777cSDuson Lin data->ops = transport_ops; 12216696777cSDuson Lin data->client = client; 12226696777cSDuson Lin init_completion(&data->fw_completion); 12236696777cSDuson Lin mutex_init(&data->sysfs_mutex); 12246696777cSDuson Lin 1225ad56814fSGuenter Roeck data->vcc = devm_regulator_get(dev, "vcc"); 12266696777cSDuson Lin if (IS_ERR(data->vcc)) { 12276696777cSDuson Lin error = PTR_ERR(data->vcc); 12286696777cSDuson Lin if (error != -EPROBE_DEFER) 1229ad56814fSGuenter Roeck dev_err(dev, "Failed to get 'vcc' regulator: %d\n", 12306696777cSDuson Lin error); 12316696777cSDuson Lin return error; 12326696777cSDuson Lin } 12336696777cSDuson Lin 12346696777cSDuson Lin error = regulator_enable(data->vcc); 12356696777cSDuson Lin if (error) { 1236ad56814fSGuenter Roeck dev_err(dev, "Failed to enable regulator: %d\n", error); 12376696777cSDuson Lin return error; 12386696777cSDuson Lin } 12396696777cSDuson Lin 12402e75cfaaSDmitry Torokhov error = devm_add_action_or_reset(dev, elan_disable_regulator, data); 12416696777cSDuson Lin if (error) { 1242ad56814fSGuenter Roeck dev_err(dev, "Failed to add disable regulator action: %d\n", 12436696777cSDuson Lin error); 12446696777cSDuson Lin return error; 12456696777cSDuson Lin } 12466696777cSDuson Lin 1247c5928551SDmitry Torokhov /* Make sure there is something at this address */ 1248c5928551SDmitry Torokhov error = i2c_smbus_read_byte(client); 1249c5928551SDmitry Torokhov if (error < 0) { 1250c5928551SDmitry Torokhov dev_dbg(&client->dev, "nothing at this address: %d\n", error); 1251c5928551SDmitry Torokhov return -ENXIO; 1252c5928551SDmitry Torokhov } 1253c5928551SDmitry Torokhov 12546696777cSDuson Lin /* Initialize the touchpad. */ 1255ea16ef96SJingle Wu error = elan_initialize(data, false); 12566696777cSDuson Lin if (error) 12576696777cSDuson Lin return error; 12586696777cSDuson Lin 12596696777cSDuson Lin error = elan_query_device_info(data); 12606696777cSDuson Lin if (error) 12616696777cSDuson Lin return error; 12626696777cSDuson Lin 12636696777cSDuson Lin error = elan_query_device_parameters(data); 12646696777cSDuson Lin if (error) 12656696777cSDuson Lin return error; 12666696777cSDuson Lin 1267ad56814fSGuenter Roeck dev_info(dev, 126839a0d75aSBenjamin Tissoires "Elan Touchpad: Module ID: 0x%04x, Firmware: 0x%04x, Sample: 0x%04x, IAP: 0x%04x\n", 12696696777cSDuson Lin data->product_id, 12706696777cSDuson Lin data->fw_version, 12716696777cSDuson Lin data->sm_version, 127239a0d75aSBenjamin Tissoires data->iap_version); 127339a0d75aSBenjamin Tissoires 1274ad56814fSGuenter Roeck dev_dbg(dev, 127539a0d75aSBenjamin Tissoires "Elan Touchpad Extra Information:\n" 127639a0d75aSBenjamin Tissoires " Max ABS X,Y: %d,%d\n" 127739a0d75aSBenjamin Tissoires " Width X,Y: %d,%d\n" 1278a2eaf299SKT Liao " Resolution X,Y: %d,%d (dots/mm)\n" 1279a2eaf299SKT Liao " ic type: 0x%x\n" 1280a2eaf299SKT Liao " info pattern: 0x%x\n", 12816696777cSDuson Lin data->max_x, data->max_y, 12826696777cSDuson Lin data->width_x, data->width_y, 1283a2eaf299SKT Liao data->x_res, data->y_res, 1284a2eaf299SKT Liao data->ic_type, data->pattern); 12856696777cSDuson Lin 12866696777cSDuson Lin /* Set up input device properties based on queried parameters. */ 12876696777cSDuson Lin error = elan_setup_input_device(data); 12886696777cSDuson Lin if (error) 12896696777cSDuson Lin return error; 12906696777cSDuson Lin 1291559b3df7SBenjamin Tissoires if (device_property_read_bool(&client->dev, "elan,trackpoint")) { 1292559b3df7SBenjamin Tissoires error = elan_setup_trackpoint_input_device(data); 1293559b3df7SBenjamin Tissoires if (error) 1294559b3df7SBenjamin Tissoires return error; 1295559b3df7SBenjamin Tissoires } 1296559b3df7SBenjamin Tissoires 12976696777cSDuson Lin /* 1298a4b0a58bSDmitry Torokhov * Platform code (ACPI, DTS) should normally set up interrupt 1299a4b0a58bSDmitry Torokhov * for us, but in case it did not let's fall back to using falling 1300a4b0a58bSDmitry Torokhov * edge to be compatible with older Chromebooks. 13016696777cSDuson Lin */ 1302a4b0a58bSDmitry Torokhov irqflags = irq_get_trigger_type(client->irq); 1303a4b0a58bSDmitry Torokhov if (!irqflags) 1304a4b0a58bSDmitry Torokhov irqflags = IRQF_TRIGGER_FALLING; 13056696777cSDuson Lin 1306ad56814fSGuenter Roeck error = devm_request_threaded_irq(dev, client->irq, NULL, elan_isr, 13076696777cSDuson Lin irqflags | IRQF_ONESHOT, 13086696777cSDuson Lin client->name, data); 13096696777cSDuson Lin if (error) { 1310ad56814fSGuenter Roeck dev_err(dev, "cannot register irq=%d\n", client->irq); 13116696777cSDuson Lin return error; 13126696777cSDuson Lin } 13136696777cSDuson Lin 13146696777cSDuson Lin error = input_register_device(data->input); 13156696777cSDuson Lin if (error) { 1316ad56814fSGuenter Roeck dev_err(dev, "failed to register input device: %d\n", error); 13176696777cSDuson Lin return error; 13186696777cSDuson Lin } 13196696777cSDuson Lin 1320559b3df7SBenjamin Tissoires if (data->tp_input) { 1321559b3df7SBenjamin Tissoires error = input_register_device(data->tp_input); 1322559b3df7SBenjamin Tissoires if (error) { 1323559b3df7SBenjamin Tissoires dev_err(&client->dev, 1324559b3df7SBenjamin Tissoires "failed to register TrackPoint input device: %d\n", 1325559b3df7SBenjamin Tissoires error); 1326559b3df7SBenjamin Tissoires return error; 1327559b3df7SBenjamin Tissoires } 1328559b3df7SBenjamin Tissoires } 1329559b3df7SBenjamin Tissoires 13306696777cSDuson Lin /* 13316696777cSDuson Lin * Systems using device tree should set up wakeup via DTS, 13326696777cSDuson Lin * the rest will configure device as wakeup source by default. 13336696777cSDuson Lin */ 1334ad56814fSGuenter Roeck if (!dev->of_node) 1335ad56814fSGuenter Roeck device_init_wakeup(dev, true); 13366696777cSDuson Lin 13376696777cSDuson Lin return 0; 13386696777cSDuson Lin } 13396696777cSDuson Lin 13406696777cSDuson Lin static int __maybe_unused elan_suspend(struct device *dev) 13416696777cSDuson Lin { 13426696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 13436696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 13446696777cSDuson Lin int ret; 13456696777cSDuson Lin 13466696777cSDuson Lin /* 13476696777cSDuson Lin * We are taking the mutex to make sure sysfs operations are 13486696777cSDuson Lin * complete before we attempt to bring the device into low[er] 13496696777cSDuson Lin * power mode. 13506696777cSDuson Lin */ 13516696777cSDuson Lin ret = mutex_lock_interruptible(&data->sysfs_mutex); 13526696777cSDuson Lin if (ret) 13536696777cSDuson Lin return ret; 13546696777cSDuson Lin 13556696777cSDuson Lin disable_irq(client->irq); 13566696777cSDuson Lin 13576696777cSDuson Lin if (device_may_wakeup(dev)) { 13586696777cSDuson Lin ret = elan_sleep(data); 13596696777cSDuson Lin /* Enable wake from IRQ */ 13606696777cSDuson Lin data->irq_wake = (enable_irq_wake(client->irq) == 0); 13616696777cSDuson Lin } else { 136281a36d8cSHans de Goede ret = elan_set_power(data, false); 136381a36d8cSHans de Goede if (ret) 136481a36d8cSHans de Goede goto err; 136581a36d8cSHans de Goede 136681a36d8cSHans de Goede ret = regulator_disable(data->vcc); 136781a36d8cSHans de Goede if (ret) { 136881a36d8cSHans de Goede dev_err(dev, "error %d disabling regulator\n", ret); 136981a36d8cSHans de Goede /* Attempt to power the chip back up */ 137081a36d8cSHans de Goede elan_set_power(data, true); 137181a36d8cSHans de Goede } 13726696777cSDuson Lin } 13736696777cSDuson Lin 137481a36d8cSHans de Goede err: 13756696777cSDuson Lin mutex_unlock(&data->sysfs_mutex); 13766696777cSDuson Lin return ret; 13776696777cSDuson Lin } 13786696777cSDuson Lin 13796696777cSDuson Lin static int __maybe_unused elan_resume(struct device *dev) 13806696777cSDuson Lin { 13816696777cSDuson Lin struct i2c_client *client = to_i2c_client(dev); 13826696777cSDuson Lin struct elan_tp_data *data = i2c_get_clientdata(client); 13836696777cSDuson Lin int error; 13846696777cSDuson Lin 138504b7762eSHans de Goede if (!device_may_wakeup(dev)) { 138681a36d8cSHans de Goede error = regulator_enable(data->vcc); 138781a36d8cSHans de Goede if (error) { 138881a36d8cSHans de Goede dev_err(dev, "error %d enabling regulator\n", error); 138981a36d8cSHans de Goede goto err; 139081a36d8cSHans de Goede } 139104b7762eSHans de Goede } else if (data->irq_wake) { 139204b7762eSHans de Goede disable_irq_wake(client->irq); 139304b7762eSHans de Goede data->irq_wake = false; 139404b7762eSHans de Goede } 139581a36d8cSHans de Goede 139681a36d8cSHans de Goede error = elan_set_power(data, true); 1397b3beed7fSDuson Lin if (error) { 13986696777cSDuson Lin dev_err(dev, "power up when resuming failed: %d\n", error); 1399b3beed7fSDuson Lin goto err; 1400b3beed7fSDuson Lin } 14016696777cSDuson Lin 1402ea16ef96SJingle Wu error = elan_initialize(data, data->quirks & ETP_QUIRK_QUICK_WAKEUP); 14036696777cSDuson Lin if (error) 14046696777cSDuson Lin dev_err(dev, "initialize when resuming failed: %d\n", error); 14056696777cSDuson Lin 1406b3beed7fSDuson Lin err: 14076696777cSDuson Lin enable_irq(data->client->irq); 1408b3beed7fSDuson Lin return error; 14096696777cSDuson Lin } 14106696777cSDuson Lin 14116696777cSDuson Lin static SIMPLE_DEV_PM_OPS(elan_pm_ops, elan_suspend, elan_resume); 14126696777cSDuson Lin 14136696777cSDuson Lin static const struct i2c_device_id elan_id[] = { 14146696777cSDuson Lin { DRIVER_NAME, 0 }, 14156696777cSDuson Lin { }, 14166696777cSDuson Lin }; 14176696777cSDuson Lin MODULE_DEVICE_TABLE(i2c, elan_id); 14186696777cSDuson Lin 14196696777cSDuson Lin #ifdef CONFIG_ACPI 1420c7f0169eSLee Jones #include <linux/input/elan-i2c-ids.h> 14216696777cSDuson Lin MODULE_DEVICE_TABLE(acpi, elan_acpi_id); 14226696777cSDuson Lin #endif 14236696777cSDuson Lin 14246696777cSDuson Lin #ifdef CONFIG_OF 14256696777cSDuson Lin static const struct of_device_id elan_of_match[] = { 14266696777cSDuson Lin { .compatible = "elan,ekth3000" }, 14276696777cSDuson Lin { /* sentinel */ } 14286696777cSDuson Lin }; 14296696777cSDuson Lin MODULE_DEVICE_TABLE(of, elan_of_match); 14306696777cSDuson Lin #endif 14316696777cSDuson Lin 14326696777cSDuson Lin static struct i2c_driver elan_driver = { 14336696777cSDuson Lin .driver = { 14346696777cSDuson Lin .name = DRIVER_NAME, 14356696777cSDuson Lin .pm = &elan_pm_ops, 14366696777cSDuson Lin .acpi_match_table = ACPI_PTR(elan_acpi_id), 14376696777cSDuson Lin .of_match_table = of_match_ptr(elan_of_match), 143871d0f562SDmitry Torokhov .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1439*938db76cSGreg Kroah-Hartman .dev_groups = elan_sysfs_groups, 14406696777cSDuson Lin }, 14416696777cSDuson Lin .probe = elan_probe, 14426696777cSDuson Lin .id_table = elan_id, 14436696777cSDuson Lin }; 14446696777cSDuson Lin 14456696777cSDuson Lin module_i2c_driver(elan_driver); 14466696777cSDuson Lin 14476696777cSDuson Lin MODULE_AUTHOR("Duson Lin <dusonlin@emc.com.tw>"); 14486696777cSDuson Lin MODULE_DESCRIPTION("Elan I2C/SMBus Touchpad driver"); 14496696777cSDuson Lin MODULE_LICENSE("GPL"); 1450