19a6a4193SAlexandrov Stansilav /* 29a6a4193SAlexandrov Stansilav * HID Driver for ELAN Touchpad 39a6a4193SAlexandrov Stansilav * 49a6a4193SAlexandrov Stansilav * Currently only supports touchpad found on HP Pavilion X2 10 59a6a4193SAlexandrov Stansilav * 69a6a4193SAlexandrov Stansilav * Copyright (c) 2016 Alexandrov Stanislav <neko@nya.ai> 79a6a4193SAlexandrov Stansilav * 89a6a4193SAlexandrov Stansilav * This program is free software; you can redistribute it and/or modify it 99a6a4193SAlexandrov Stansilav * under the terms of the GNU General Public License as published by the Free 109a6a4193SAlexandrov Stansilav * Software Foundation; either version 2 of the License, or (at your option) 119a6a4193SAlexandrov Stansilav * any later version. 129a6a4193SAlexandrov Stansilav */ 139a6a4193SAlexandrov Stansilav 149a6a4193SAlexandrov Stansilav #include <linux/hid.h> 159a6a4193SAlexandrov Stansilav #include <linux/input/mt.h> 169a6a4193SAlexandrov Stansilav #include <linux/leds.h> 179a6a4193SAlexandrov Stansilav #include <linux/module.h> 189a6a4193SAlexandrov Stansilav #include <linux/usb.h> 199a6a4193SAlexandrov Stansilav 209a6a4193SAlexandrov Stansilav #include "hid-ids.h" 219a6a4193SAlexandrov Stansilav 229a6a4193SAlexandrov Stansilav #define ELAN_SINGLE_FINGER 0x81 239a6a4193SAlexandrov Stansilav #define ELAN_MT_FIRST_FINGER 0x82 249a6a4193SAlexandrov Stansilav #define ELAN_MT_SECOND_FINGER 0x83 259a6a4193SAlexandrov Stansilav #define ELAN_INPUT_REPORT_SIZE 8 26314f04e8SHans de Goede #define ELAN_MAX_FINGERS 5 272f612de2SHans de Goede #define ELAN_MAX_PRESSURE 255 28314f04e8SHans de Goede #define ELAN_TP_USB_INTF 1 299a6a4193SAlexandrov Stansilav 3079d11f2aSHans de Goede #define ELAN_FEATURE_REPORT 0x0d 3179d11f2aSHans de Goede #define ELAN_FEATURE_SIZE 5 3279d11f2aSHans de Goede #define ELAN_PARAM_MAX_X 6 3379d11f2aSHans de Goede #define ELAN_PARAM_MAX_Y 7 3479d11f2aSHans de Goede #define ELAN_PARAM_RES 8 3579d11f2aSHans de Goede 369a6a4193SAlexandrov Stansilav #define ELAN_MUTE_LED_REPORT 0xBC 379a6a4193SAlexandrov Stansilav #define ELAN_LED_REPORT_SIZE 8 389a6a4193SAlexandrov Stansilav 397ed3f281SHans de Goede #define ELAN_HAS_LED BIT(0) 407ed3f281SHans de Goede 419a6a4193SAlexandrov Stansilav struct elan_drvdata { 429a6a4193SAlexandrov Stansilav struct input_dev *input; 439a6a4193SAlexandrov Stansilav u8 prev_report[ELAN_INPUT_REPORT_SIZE]; 449a6a4193SAlexandrov Stansilav struct led_classdev mute_led; 459a6a4193SAlexandrov Stansilav u8 mute_led_state; 4679d11f2aSHans de Goede u16 max_x; 4779d11f2aSHans de Goede u16 max_y; 4819588beeSHans de Goede u16 res_x; 4919588beeSHans de Goede u16 res_y; 509a6a4193SAlexandrov Stansilav }; 519a6a4193SAlexandrov Stansilav 529a6a4193SAlexandrov Stansilav static int is_not_elan_touchpad(struct hid_device *hdev) 539a6a4193SAlexandrov Stansilav { 549a6a4193SAlexandrov Stansilav struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 559a6a4193SAlexandrov Stansilav 56314f04e8SHans de Goede return (intf->altsetting->desc.bInterfaceNumber != ELAN_TP_USB_INTF); 579a6a4193SAlexandrov Stansilav } 589a6a4193SAlexandrov Stansilav 599a6a4193SAlexandrov Stansilav static int elan_input_mapping(struct hid_device *hdev, struct hid_input *hi, 609a6a4193SAlexandrov Stansilav struct hid_field *field, struct hid_usage *usage, 619a6a4193SAlexandrov Stansilav unsigned long **bit, int *max) 629a6a4193SAlexandrov Stansilav { 639a6a4193SAlexandrov Stansilav if (is_not_elan_touchpad(hdev)) 649a6a4193SAlexandrov Stansilav return 0; 659a6a4193SAlexandrov Stansilav 669a6a4193SAlexandrov Stansilav if (field->report->id == ELAN_SINGLE_FINGER || 679a6a4193SAlexandrov Stansilav field->report->id == ELAN_MT_FIRST_FINGER || 689a6a4193SAlexandrov Stansilav field->report->id == ELAN_MT_SECOND_FINGER) 699a6a4193SAlexandrov Stansilav return -1; 709a6a4193SAlexandrov Stansilav 719a6a4193SAlexandrov Stansilav return 0; 729a6a4193SAlexandrov Stansilav } 739a6a4193SAlexandrov Stansilav 7479d11f2aSHans de Goede static int elan_get_device_param(struct hid_device *hdev, 7579d11f2aSHans de Goede unsigned char *dmabuf, unsigned char param) 7679d11f2aSHans de Goede { 7779d11f2aSHans de Goede int ret; 7879d11f2aSHans de Goede 7979d11f2aSHans de Goede dmabuf[0] = ELAN_FEATURE_REPORT; 8079d11f2aSHans de Goede dmabuf[1] = 0x05; 8179d11f2aSHans de Goede dmabuf[2] = 0x03; 8279d11f2aSHans de Goede dmabuf[3] = param; 8379d11f2aSHans de Goede dmabuf[4] = 0x01; 8479d11f2aSHans de Goede 8579d11f2aSHans de Goede ret = hid_hw_raw_request(hdev, ELAN_FEATURE_REPORT, dmabuf, 8679d11f2aSHans de Goede ELAN_FEATURE_SIZE, HID_FEATURE_REPORT, 8779d11f2aSHans de Goede HID_REQ_SET_REPORT); 8879d11f2aSHans de Goede if (ret != ELAN_FEATURE_SIZE) { 8979d11f2aSHans de Goede hid_err(hdev, "Set report error for parm %d: %d\n", param, ret); 9079d11f2aSHans de Goede return ret; 9179d11f2aSHans de Goede } 9279d11f2aSHans de Goede 9379d11f2aSHans de Goede ret = hid_hw_raw_request(hdev, ELAN_FEATURE_REPORT, dmabuf, 9479d11f2aSHans de Goede ELAN_FEATURE_SIZE, HID_FEATURE_REPORT, 9579d11f2aSHans de Goede HID_REQ_GET_REPORT); 9679d11f2aSHans de Goede if (ret != ELAN_FEATURE_SIZE) { 9779d11f2aSHans de Goede hid_err(hdev, "Get report error for parm %d: %d\n", param, ret); 9879d11f2aSHans de Goede return ret; 9979d11f2aSHans de Goede } 10079d11f2aSHans de Goede 10179d11f2aSHans de Goede return 0; 10279d11f2aSHans de Goede } 10379d11f2aSHans de Goede 10419588beeSHans de Goede static unsigned int elan_convert_res(char val) 10519588beeSHans de Goede { 10619588beeSHans de Goede /* 10719588beeSHans de Goede * (value from firmware) * 10 + 790 = dpi 10819588beeSHans de Goede * dpi * 10 / 254 = dots/mm 10919588beeSHans de Goede */ 11019588beeSHans de Goede return (val * 10 + 790) * 10 / 254; 11119588beeSHans de Goede } 11219588beeSHans de Goede 11379d11f2aSHans de Goede static int elan_get_device_params(struct hid_device *hdev) 11479d11f2aSHans de Goede { 11579d11f2aSHans de Goede struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 11679d11f2aSHans de Goede unsigned char *dmabuf; 11779d11f2aSHans de Goede int ret; 11879d11f2aSHans de Goede 11979d11f2aSHans de Goede dmabuf = kmalloc(ELAN_FEATURE_SIZE, GFP_KERNEL); 12079d11f2aSHans de Goede if (!dmabuf) 12179d11f2aSHans de Goede return -ENOMEM; 12279d11f2aSHans de Goede 12379d11f2aSHans de Goede ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_MAX_X); 12479d11f2aSHans de Goede if (ret) 12579d11f2aSHans de Goede goto err; 12679d11f2aSHans de Goede 12779d11f2aSHans de Goede drvdata->max_x = (dmabuf[4] << 8) | dmabuf[3]; 12879d11f2aSHans de Goede 12979d11f2aSHans de Goede ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_MAX_Y); 13079d11f2aSHans de Goede if (ret) 13179d11f2aSHans de Goede goto err; 13279d11f2aSHans de Goede 13379d11f2aSHans de Goede drvdata->max_y = (dmabuf[4] << 8) | dmabuf[3]; 13479d11f2aSHans de Goede 13519588beeSHans de Goede ret = elan_get_device_param(hdev, dmabuf, ELAN_PARAM_RES); 13619588beeSHans de Goede if (ret) 13719588beeSHans de Goede goto err; 13819588beeSHans de Goede 13919588beeSHans de Goede drvdata->res_x = elan_convert_res(dmabuf[3]); 14019588beeSHans de Goede drvdata->res_y = elan_convert_res(dmabuf[4]); 14119588beeSHans de Goede 14279d11f2aSHans de Goede err: 14379d11f2aSHans de Goede kfree(dmabuf); 14479d11f2aSHans de Goede return ret; 14579d11f2aSHans de Goede } 14679d11f2aSHans de Goede 1479a6a4193SAlexandrov Stansilav static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi) 1489a6a4193SAlexandrov Stansilav { 1499a6a4193SAlexandrov Stansilav int ret; 1509a6a4193SAlexandrov Stansilav struct input_dev *input; 1519a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 1529a6a4193SAlexandrov Stansilav 1539a6a4193SAlexandrov Stansilav if (is_not_elan_touchpad(hdev)) 1549a6a4193SAlexandrov Stansilav return 0; 1559a6a4193SAlexandrov Stansilav 15679d11f2aSHans de Goede ret = elan_get_device_params(hdev); 15779d11f2aSHans de Goede if (ret) 15879d11f2aSHans de Goede return ret; 15979d11f2aSHans de Goede 1609a6a4193SAlexandrov Stansilav input = devm_input_allocate_device(&hdev->dev); 1619a6a4193SAlexandrov Stansilav if (!input) 1629a6a4193SAlexandrov Stansilav return -ENOMEM; 1639a6a4193SAlexandrov Stansilav 1649a6a4193SAlexandrov Stansilav input->name = "Elan Touchpad"; 1659a6a4193SAlexandrov Stansilav input->phys = hdev->phys; 1669a6a4193SAlexandrov Stansilav input->uniq = hdev->uniq; 1679a6a4193SAlexandrov Stansilav input->id.bustype = hdev->bus; 1689a6a4193SAlexandrov Stansilav input->id.vendor = hdev->vendor; 1699a6a4193SAlexandrov Stansilav input->id.product = hdev->product; 1709a6a4193SAlexandrov Stansilav input->id.version = hdev->version; 1719a6a4193SAlexandrov Stansilav input->dev.parent = &hdev->dev; 1729a6a4193SAlexandrov Stansilav 17379d11f2aSHans de Goede input_set_abs_params(input, ABS_MT_POSITION_X, 0, drvdata->max_x, 17479d11f2aSHans de Goede 0, 0); 17579d11f2aSHans de Goede input_set_abs_params(input, ABS_MT_POSITION_Y, 0, drvdata->max_y, 17679d11f2aSHans de Goede 0, 0); 1772f612de2SHans de Goede input_set_abs_params(input, ABS_MT_PRESSURE, 0, ELAN_MAX_PRESSURE, 1782f612de2SHans de Goede 0, 0); 1799a6a4193SAlexandrov Stansilav 1809a6a4193SAlexandrov Stansilav __set_bit(BTN_LEFT, input->keybit); 1819a6a4193SAlexandrov Stansilav __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 1829a6a4193SAlexandrov Stansilav 183314f04e8SHans de Goede ret = input_mt_init_slots(input, ELAN_MAX_FINGERS, INPUT_MT_POINTER); 1849a6a4193SAlexandrov Stansilav if (ret) { 1859a6a4193SAlexandrov Stansilav hid_err(hdev, "Failed to init elan MT slots: %d\n", ret); 1869a6a4193SAlexandrov Stansilav return ret; 1879a6a4193SAlexandrov Stansilav } 1889a6a4193SAlexandrov Stansilav 18919588beeSHans de Goede input_abs_set_res(input, ABS_X, drvdata->res_x); 19019588beeSHans de Goede input_abs_set_res(input, ABS_Y, drvdata->res_y); 19119588beeSHans de Goede 1929a6a4193SAlexandrov Stansilav ret = input_register_device(input); 1939a6a4193SAlexandrov Stansilav if (ret) { 1949a6a4193SAlexandrov Stansilav hid_err(hdev, "Failed to register elan input device: %d\n", 1959a6a4193SAlexandrov Stansilav ret); 1969a6a4193SAlexandrov Stansilav input_free_device(input); 1979a6a4193SAlexandrov Stansilav return ret; 1989a6a4193SAlexandrov Stansilav } 1999a6a4193SAlexandrov Stansilav 2009a6a4193SAlexandrov Stansilav drvdata->input = input; 2019a6a4193SAlexandrov Stansilav 2029a6a4193SAlexandrov Stansilav return 0; 2039a6a4193SAlexandrov Stansilav } 2049a6a4193SAlexandrov Stansilav 2059a6a4193SAlexandrov Stansilav static void elan_report_mt_slot(struct elan_drvdata *drvdata, u8 *data, 2069a6a4193SAlexandrov Stansilav unsigned int slot_num) 2079a6a4193SAlexandrov Stansilav { 2089a6a4193SAlexandrov Stansilav struct input_dev *input = drvdata->input; 2092f612de2SHans de Goede int x, y, p; 2109a6a4193SAlexandrov Stansilav 2119a6a4193SAlexandrov Stansilav bool active = !!data; 2129a6a4193SAlexandrov Stansilav 2139a6a4193SAlexandrov Stansilav input_mt_slot(input, slot_num); 2149a6a4193SAlexandrov Stansilav input_mt_report_slot_state(input, MT_TOOL_FINGER, active); 2159a6a4193SAlexandrov Stansilav if (active) { 2169a6a4193SAlexandrov Stansilav x = ((data[0] & 0xF0) << 4) | data[1]; 21779d11f2aSHans de Goede y = drvdata->max_y - 2189a6a4193SAlexandrov Stansilav (((data[0] & 0x07) << 8) | data[2]); 2192f612de2SHans de Goede p = data[4]; 2209a6a4193SAlexandrov Stansilav 2219a6a4193SAlexandrov Stansilav input_report_abs(input, ABS_MT_POSITION_X, x); 2229a6a4193SAlexandrov Stansilav input_report_abs(input, ABS_MT_POSITION_Y, y); 2232f612de2SHans de Goede input_report_abs(input, ABS_MT_PRESSURE, p); 2249a6a4193SAlexandrov Stansilav } 2259a6a4193SAlexandrov Stansilav } 2269a6a4193SAlexandrov Stansilav 2279a6a4193SAlexandrov Stansilav static void elan_report_input(struct elan_drvdata *drvdata, u8 *data) 2289a6a4193SAlexandrov Stansilav { 2299a6a4193SAlexandrov Stansilav int i; 2309a6a4193SAlexandrov Stansilav struct input_dev *input = drvdata->input; 2319a6a4193SAlexandrov Stansilav 2329a6a4193SAlexandrov Stansilav /* 2339a6a4193SAlexandrov Stansilav * There is 3 types of reports: for single touch, 2349a6a4193SAlexandrov Stansilav * for multitouch - first finger and for multitouch - second finger 2359a6a4193SAlexandrov Stansilav * 2369a6a4193SAlexandrov Stansilav * packet structure for ELAN_SINGLE_FINGER and ELAN_MT_FIRST_FINGER: 2379a6a4193SAlexandrov Stansilav * 2389a6a4193SAlexandrov Stansilav * byte 1: 1 0 0 0 0 0 0 1 // 0x81 or 0x82 2399a6a4193SAlexandrov Stansilav * byte 2: 0 0 0 0 0 0 0 0 // looks like unused 2409a6a4193SAlexandrov Stansilav * byte 3: f5 f4 f3 f2 f1 0 0 L 2419a6a4193SAlexandrov Stansilav * byte 4: x12 x11 x10 x9 0? y11 y10 y9 2429a6a4193SAlexandrov Stansilav * byte 5: x8 x7 x6 x5 x4 x3 x2 x1 2439a6a4193SAlexandrov Stansilav * byte 6: y8 y7 y6 y5 y4 y3 y2 y1 2449a6a4193SAlexandrov Stansilav * byte 7: sy4 sy3 sy2 sy1 sx4 sx3 sx2 sx1 2452f612de2SHans de Goede * byte 8: p8 p7 p6 p5 p4 p3 p2 p1 2469a6a4193SAlexandrov Stansilav * 2479a6a4193SAlexandrov Stansilav * packet structure for ELAN_MT_SECOND_FINGER: 2489a6a4193SAlexandrov Stansilav * 2499a6a4193SAlexandrov Stansilav * byte 1: 1 0 0 0 0 0 1 1 // 0x83 2509a6a4193SAlexandrov Stansilav * byte 2: x12 x11 x10 x9 0 y11 y10 y9 2519a6a4193SAlexandrov Stansilav * byte 3: x8 x7 x6 x5 x4 x3 x2 x1 2529a6a4193SAlexandrov Stansilav * byte 4: y8 y7 y6 y5 y4 y3 y2 y1 2539a6a4193SAlexandrov Stansilav * byte 5: sy4 sy3 sy2 sy1 sx4 sx3 sx2 sx1 2542f612de2SHans de Goede * byte 6: p8 p7 p6 p5 p4 p3 p2 p1 2559a6a4193SAlexandrov Stansilav * byte 7: 0 0 0 0 0 0 0 0 2569a6a4193SAlexandrov Stansilav * byte 8: 0 0 0 0 0 0 0 0 2579a6a4193SAlexandrov Stansilav * 2589a6a4193SAlexandrov Stansilav * f5-f1: finger touch bits 2599a6a4193SAlexandrov Stansilav * L: clickpad button 2602f612de2SHans de Goede * sy / sx: finger width / height expressed in traces, the total number 2612f612de2SHans de Goede * of traces can be queried by doing a HID_REQ_SET_REPORT 2622f612de2SHans de Goede * { 0x0d, 0x05, 0x03, 0x05, 0x01 } followed by a GET, in the 2632f612de2SHans de Goede * returned buf, buf[3]=no-x-traces, buf[4]=no-y-traces. 2642f612de2SHans de Goede * p: pressure 2659a6a4193SAlexandrov Stansilav */ 2669a6a4193SAlexandrov Stansilav 2679a6a4193SAlexandrov Stansilav if (data[0] == ELAN_SINGLE_FINGER) { 268314f04e8SHans de Goede for (i = 0; i < ELAN_MAX_FINGERS; i++) { 2699a6a4193SAlexandrov Stansilav if (data[2] & BIT(i + 3)) 2709a6a4193SAlexandrov Stansilav elan_report_mt_slot(drvdata, data + 3, i); 2719a6a4193SAlexandrov Stansilav else 2729a6a4193SAlexandrov Stansilav elan_report_mt_slot(drvdata, NULL, i); 2739a6a4193SAlexandrov Stansilav } 2749a6a4193SAlexandrov Stansilav input_report_key(input, BTN_LEFT, data[2] & 0x01); 2759a6a4193SAlexandrov Stansilav } 2769a6a4193SAlexandrov Stansilav /* 2779a6a4193SAlexandrov Stansilav * When touched with two fingers Elan touchpad will emit two HID reports 2789a6a4193SAlexandrov Stansilav * first is ELAN_MT_FIRST_FINGER and second is ELAN_MT_SECOND_FINGER 2799a6a4193SAlexandrov Stansilav * we will save ELAN_MT_FIRST_FINGER report and wait for 2809a6a4193SAlexandrov Stansilav * ELAN_MT_SECOND_FINGER to finish multitouch 2819a6a4193SAlexandrov Stansilav */ 2829a6a4193SAlexandrov Stansilav if (data[0] == ELAN_MT_FIRST_FINGER) { 2839a6a4193SAlexandrov Stansilav memcpy(drvdata->prev_report, data, 2849a6a4193SAlexandrov Stansilav sizeof(drvdata->prev_report)); 2859a6a4193SAlexandrov Stansilav return; 2869a6a4193SAlexandrov Stansilav } 2879a6a4193SAlexandrov Stansilav 2889a6a4193SAlexandrov Stansilav if (data[0] == ELAN_MT_SECOND_FINGER) { 2899a6a4193SAlexandrov Stansilav int first = 0; 2909a6a4193SAlexandrov Stansilav u8 *prev_report = drvdata->prev_report; 2919a6a4193SAlexandrov Stansilav 2929a6a4193SAlexandrov Stansilav if (prev_report[0] != ELAN_MT_FIRST_FINGER) 2939a6a4193SAlexandrov Stansilav return; 2949a6a4193SAlexandrov Stansilav 295314f04e8SHans de Goede for (i = 0; i < ELAN_MAX_FINGERS; i++) { 2969a6a4193SAlexandrov Stansilav if (prev_report[2] & BIT(i + 3)) { 2979a6a4193SAlexandrov Stansilav if (!first) { 2989a6a4193SAlexandrov Stansilav first = 1; 2999a6a4193SAlexandrov Stansilav elan_report_mt_slot(drvdata, prev_report + 3, i); 3009a6a4193SAlexandrov Stansilav } else { 3019a6a4193SAlexandrov Stansilav elan_report_mt_slot(drvdata, data + 1, i); 3029a6a4193SAlexandrov Stansilav } 3039a6a4193SAlexandrov Stansilav } else { 3049a6a4193SAlexandrov Stansilav elan_report_mt_slot(drvdata, NULL, i); 3059a6a4193SAlexandrov Stansilav } 3069a6a4193SAlexandrov Stansilav } 3079a6a4193SAlexandrov Stansilav input_report_key(input, BTN_LEFT, prev_report[2] & 0x01); 3089a6a4193SAlexandrov Stansilav } 3099a6a4193SAlexandrov Stansilav 3109a6a4193SAlexandrov Stansilav input_mt_sync_frame(input); 3119a6a4193SAlexandrov Stansilav input_sync(input); 3129a6a4193SAlexandrov Stansilav } 3139a6a4193SAlexandrov Stansilav 3149a6a4193SAlexandrov Stansilav static int elan_raw_event(struct hid_device *hdev, 3159a6a4193SAlexandrov Stansilav struct hid_report *report, u8 *data, int size) 3169a6a4193SAlexandrov Stansilav { 3179a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 3189a6a4193SAlexandrov Stansilav 3199a6a4193SAlexandrov Stansilav if (is_not_elan_touchpad(hdev)) 3209a6a4193SAlexandrov Stansilav return 0; 3219a6a4193SAlexandrov Stansilav 3229a6a4193SAlexandrov Stansilav if (data[0] == ELAN_SINGLE_FINGER || 3239a6a4193SAlexandrov Stansilav data[0] == ELAN_MT_FIRST_FINGER || 3249a6a4193SAlexandrov Stansilav data[0] == ELAN_MT_SECOND_FINGER) { 3259a6a4193SAlexandrov Stansilav if (size == ELAN_INPUT_REPORT_SIZE) { 3269a6a4193SAlexandrov Stansilav elan_report_input(drvdata, data); 3279a6a4193SAlexandrov Stansilav return 1; 3289a6a4193SAlexandrov Stansilav } 3299a6a4193SAlexandrov Stansilav } 3309a6a4193SAlexandrov Stansilav 3319a6a4193SAlexandrov Stansilav return 0; 3329a6a4193SAlexandrov Stansilav } 3339a6a4193SAlexandrov Stansilav 3349a6a4193SAlexandrov Stansilav static int elan_start_multitouch(struct hid_device *hdev) 3359a6a4193SAlexandrov Stansilav { 3369a6a4193SAlexandrov Stansilav int ret; 3379a6a4193SAlexandrov Stansilav 3389a6a4193SAlexandrov Stansilav /* 3399a6a4193SAlexandrov Stansilav * This byte sequence will enable multitouch mode and disable 3409a6a4193SAlexandrov Stansilav * mouse emulation 3419a6a4193SAlexandrov Stansilav */ 3429a6a4193SAlexandrov Stansilav const unsigned char buf[] = { 0x0D, 0x00, 0x03, 0x21, 0x00 }; 3439a6a4193SAlexandrov Stansilav unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL); 3449a6a4193SAlexandrov Stansilav 3459a6a4193SAlexandrov Stansilav if (!dmabuf) 3469a6a4193SAlexandrov Stansilav return -ENOMEM; 3479a6a4193SAlexandrov Stansilav 3489a6a4193SAlexandrov Stansilav ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf), 3499a6a4193SAlexandrov Stansilav HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 3509a6a4193SAlexandrov Stansilav 3519a6a4193SAlexandrov Stansilav kfree(dmabuf); 3529a6a4193SAlexandrov Stansilav 3539a6a4193SAlexandrov Stansilav if (ret != sizeof(buf)) { 3549a6a4193SAlexandrov Stansilav hid_err(hdev, "Failed to start multitouch: %d\n", ret); 3559a6a4193SAlexandrov Stansilav return ret; 3569a6a4193SAlexandrov Stansilav } 3579a6a4193SAlexandrov Stansilav 3589a6a4193SAlexandrov Stansilav return 0; 3599a6a4193SAlexandrov Stansilav } 3609a6a4193SAlexandrov Stansilav 3619a6a4193SAlexandrov Stansilav static enum led_brightness elan_mute_led_get_brigtness(struct led_classdev *led_cdev) 3629a6a4193SAlexandrov Stansilav { 3639a6a4193SAlexandrov Stansilav struct device *dev = led_cdev->dev->parent; 3649a6a4193SAlexandrov Stansilav struct hid_device *hdev = to_hid_device(dev); 3659a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 3669a6a4193SAlexandrov Stansilav 3679a6a4193SAlexandrov Stansilav return drvdata->mute_led_state; 3689a6a4193SAlexandrov Stansilav } 3699a6a4193SAlexandrov Stansilav 3709a6a4193SAlexandrov Stansilav static int elan_mute_led_set_brigtness(struct led_classdev *led_cdev, 3719a6a4193SAlexandrov Stansilav enum led_brightness value) 3729a6a4193SAlexandrov Stansilav { 3739a6a4193SAlexandrov Stansilav int ret; 3749a6a4193SAlexandrov Stansilav u8 led_state; 3759a6a4193SAlexandrov Stansilav struct device *dev = led_cdev->dev->parent; 3769a6a4193SAlexandrov Stansilav struct hid_device *hdev = to_hid_device(dev); 3779a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 3789a6a4193SAlexandrov Stansilav 3799a6a4193SAlexandrov Stansilav unsigned char *dmabuf = kzalloc(ELAN_LED_REPORT_SIZE, GFP_KERNEL); 3809a6a4193SAlexandrov Stansilav 3819a6a4193SAlexandrov Stansilav if (!dmabuf) 3829a6a4193SAlexandrov Stansilav return -ENOMEM; 3839a6a4193SAlexandrov Stansilav 3849a6a4193SAlexandrov Stansilav led_state = !!value; 3859a6a4193SAlexandrov Stansilav 3869a6a4193SAlexandrov Stansilav dmabuf[0] = ELAN_MUTE_LED_REPORT; 3879a6a4193SAlexandrov Stansilav dmabuf[1] = 0x02; 3889a6a4193SAlexandrov Stansilav dmabuf[2] = led_state; 3899a6a4193SAlexandrov Stansilav 3909a6a4193SAlexandrov Stansilav ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, ELAN_LED_REPORT_SIZE, 3919a6a4193SAlexandrov Stansilav HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 3929a6a4193SAlexandrov Stansilav 3939a6a4193SAlexandrov Stansilav kfree(dmabuf); 3949a6a4193SAlexandrov Stansilav 3959a6a4193SAlexandrov Stansilav if (ret != ELAN_LED_REPORT_SIZE) { 3969a6a4193SAlexandrov Stansilav hid_err(hdev, "Failed to set mute led brightness: %d\n", ret); 3979a6a4193SAlexandrov Stansilav return ret; 3989a6a4193SAlexandrov Stansilav } 3999a6a4193SAlexandrov Stansilav 4009a6a4193SAlexandrov Stansilav drvdata->mute_led_state = led_state; 4019a6a4193SAlexandrov Stansilav return 0; 4029a6a4193SAlexandrov Stansilav } 4039a6a4193SAlexandrov Stansilav 4049a6a4193SAlexandrov Stansilav static int elan_init_mute_led(struct hid_device *hdev) 4059a6a4193SAlexandrov Stansilav { 4069a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata = hid_get_drvdata(hdev); 4079a6a4193SAlexandrov Stansilav struct led_classdev *mute_led = &drvdata->mute_led; 4089a6a4193SAlexandrov Stansilav 4099a6a4193SAlexandrov Stansilav mute_led->name = "elan:red:mute"; 4109a6a4193SAlexandrov Stansilav mute_led->brightness_get = elan_mute_led_get_brigtness; 4119a6a4193SAlexandrov Stansilav mute_led->brightness_set_blocking = elan_mute_led_set_brigtness; 4129a6a4193SAlexandrov Stansilav mute_led->max_brightness = LED_ON; 4139a6a4193SAlexandrov Stansilav mute_led->dev = &hdev->dev; 4149a6a4193SAlexandrov Stansilav 4159a6a4193SAlexandrov Stansilav return devm_led_classdev_register(&hdev->dev, mute_led); 4169a6a4193SAlexandrov Stansilav } 4179a6a4193SAlexandrov Stansilav 4189a6a4193SAlexandrov Stansilav static int elan_probe(struct hid_device *hdev, const struct hid_device_id *id) 4199a6a4193SAlexandrov Stansilav { 4209a6a4193SAlexandrov Stansilav int ret; 4219a6a4193SAlexandrov Stansilav struct elan_drvdata *drvdata; 4229a6a4193SAlexandrov Stansilav 4239a6a4193SAlexandrov Stansilav drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); 4249a6a4193SAlexandrov Stansilav 4259a6a4193SAlexandrov Stansilav if (!drvdata) 4269a6a4193SAlexandrov Stansilav return -ENOMEM; 4279a6a4193SAlexandrov Stansilav 4289a6a4193SAlexandrov Stansilav hid_set_drvdata(hdev, drvdata); 4299a6a4193SAlexandrov Stansilav 4309a6a4193SAlexandrov Stansilav ret = hid_parse(hdev); 4319a6a4193SAlexandrov Stansilav if (ret) { 4329a6a4193SAlexandrov Stansilav hid_err(hdev, "Hid Parse failed\n"); 4339a6a4193SAlexandrov Stansilav return ret; 4349a6a4193SAlexandrov Stansilav } 4359a6a4193SAlexandrov Stansilav 4369a6a4193SAlexandrov Stansilav ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 4379a6a4193SAlexandrov Stansilav if (ret) { 4389a6a4193SAlexandrov Stansilav hid_err(hdev, "Hid hw start failed\n"); 4399a6a4193SAlexandrov Stansilav return ret; 4409a6a4193SAlexandrov Stansilav } 4419a6a4193SAlexandrov Stansilav 4429a6a4193SAlexandrov Stansilav if (is_not_elan_touchpad(hdev)) 4439a6a4193SAlexandrov Stansilav return 0; 4449a6a4193SAlexandrov Stansilav 4459a6a4193SAlexandrov Stansilav if (!drvdata->input) { 4469a6a4193SAlexandrov Stansilav hid_err(hdev, "Input device is not registred\n"); 4479a6a4193SAlexandrov Stansilav ret = -ENAVAIL; 4489a6a4193SAlexandrov Stansilav goto err; 4499a6a4193SAlexandrov Stansilav } 4509a6a4193SAlexandrov Stansilav 4519a6a4193SAlexandrov Stansilav ret = elan_start_multitouch(hdev); 4529a6a4193SAlexandrov Stansilav if (ret) 4539a6a4193SAlexandrov Stansilav goto err; 4549a6a4193SAlexandrov Stansilav 4557ed3f281SHans de Goede if (id->driver_data & ELAN_HAS_LED) { 4569a6a4193SAlexandrov Stansilav ret = elan_init_mute_led(hdev); 4579a6a4193SAlexandrov Stansilav if (ret) 4589a6a4193SAlexandrov Stansilav goto err; 4597ed3f281SHans de Goede } 4609a6a4193SAlexandrov Stansilav 4619a6a4193SAlexandrov Stansilav return 0; 4629a6a4193SAlexandrov Stansilav err: 4639a6a4193SAlexandrov Stansilav hid_hw_stop(hdev); 4649a6a4193SAlexandrov Stansilav return ret; 4659a6a4193SAlexandrov Stansilav } 4669a6a4193SAlexandrov Stansilav 4679a6a4193SAlexandrov Stansilav static void elan_remove(struct hid_device *hdev) 4689a6a4193SAlexandrov Stansilav { 4699a6a4193SAlexandrov Stansilav hid_hw_stop(hdev); 4709a6a4193SAlexandrov Stansilav } 4719a6a4193SAlexandrov Stansilav 4729a6a4193SAlexandrov Stansilav static const struct hid_device_id elan_devices[] = { 473*6e5dd632SHans de Goede { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2), 474*6e5dd632SHans de Goede .driver_data = ELAN_HAS_LED }, 4757ed3f281SHans de Goede { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2_10_COVER), 4767ed3f281SHans de Goede .driver_data = ELAN_HAS_LED }, 4779a6a4193SAlexandrov Stansilav { } 4789a6a4193SAlexandrov Stansilav }; 4799a6a4193SAlexandrov Stansilav MODULE_DEVICE_TABLE(hid, elan_devices); 4809a6a4193SAlexandrov Stansilav 4819a6a4193SAlexandrov Stansilav static struct hid_driver elan_driver = { 4829a6a4193SAlexandrov Stansilav .name = "elan", 4839a6a4193SAlexandrov Stansilav .id_table = elan_devices, 4849a6a4193SAlexandrov Stansilav .input_mapping = elan_input_mapping, 4859a6a4193SAlexandrov Stansilav .input_configured = elan_input_configured, 4869a6a4193SAlexandrov Stansilav .raw_event = elan_raw_event, 4879a6a4193SAlexandrov Stansilav .probe = elan_probe, 4889a6a4193SAlexandrov Stansilav .remove = elan_remove, 4899a6a4193SAlexandrov Stansilav }; 4909a6a4193SAlexandrov Stansilav 4919a6a4193SAlexandrov Stansilav module_hid_driver(elan_driver); 4929a6a4193SAlexandrov Stansilav 4939a6a4193SAlexandrov Stansilav MODULE_LICENSE("GPL"); 4949a6a4193SAlexandrov Stansilav MODULE_AUTHOR("Alexandrov Stanislav"); 4959a6a4193SAlexandrov Stansilav MODULE_DESCRIPTION("Driver for HID ELAN Touchpads"); 496