From patchwork Sun Mar 25 16:07:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rodrigo Rivas Costa X-Patchwork-Id: 10306677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AB542600F6 for ; Sun, 25 Mar 2018 16:08:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9786D292D4 for ; Sun, 25 Mar 2018 16:08:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8B28E292EF; Sun, 25 Mar 2018 16:08:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,FREEMAIL_FROM,RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 08C3F292D4 for ; Sun, 25 Mar 2018 16:08:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753468AbeCYQHs (ORCPT ); Sun, 25 Mar 2018 12:07:48 -0400 Received: from mail-wm0-f67.google.com ([74.125.82.67]:51840 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753423AbeCYQHV (ORCPT ); Sun, 25 Mar 2018 12:07:21 -0400 Received: by mail-wm0-f67.google.com with SMTP id v21so11217610wmc.1; Sun, 25 Mar 2018 09:07:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=EFYF9DMiM1fqMegptpv5H37T5aVYzxMK4SU2ZJORECc=; b=QPC9Um+ipfL3JvwsOf+POUAl+682rNorE8/Tewuy7Gw3q/rXOEHBMNO9yjIUN6Gr5T GoUVnQmIhdBtOsy8IySCjy8v5NGzjN78BiD6KmPE2N4gav5eTYQa3RFDBTjZFqx0/gkx WheMxv8q0C/aGyq0B2lp1xkkqxvIBl0/hEEhwdrGHNVZVdF1z6U/joKVapz5q6udVqFL leNQW+1kV3dDXf97DGFMAiBvwtfGdc5jtYzMD4H/8A9fDH0dLE2D1L59K4fnDS2+TBSc /QiE4pB9OXQq30iJrGO8RPyx3E1iUknoVGQaZF8k03OryOGcSxi61othhNX5LF4i69oS Qd7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=EFYF9DMiM1fqMegptpv5H37T5aVYzxMK4SU2ZJORECc=; b=EExl++7+sQkM5097h+rtjWUDsDFKBg1s4DVvkVr+7uV5lykzc4aiN/sK6OCKliLf/J XLY6ep7TTRaaUWOQsX/Mx2mNFAs6QnovqVqROngwpE06GtE2TVih8sVSMC2L9DSvhS/w /y0EVZKgr207vQDYfO4R5Z3ZoWAEF9GY7ccQWVHdsKh+Ht7MiVlwTolPXz91pGHDWNk7 N9Ypr5S9a8ZNFywx64EJhmsWjwIWxPFQ6LWYIyAkBsRXWaf2RRkJ7w1mOQ+QLr4E6TPI 9/z1xqJ5KioseQ/mxzG+LyXbgxBc86+96qCVvfm1gR5sFrrFh7zuYoNvtzdDlRvmTcXa M0Gg== X-Gm-Message-State: AElRT7HPk73sI0tQTbLZkq+dwCCLeKFmzyHO7iUssQz3I7BG2BCJLJ3L TQPjEvlVnjQCjndtAYnZB6o= X-Google-Smtp-Source: AG47ELtQo5HEMOcTJcoYvHIC6Pnd6748QMmVVCnsBihr1OJsc7s8UzasSWcpkUrDtudwHP46xMpVBA== X-Received: by 10.28.129.80 with SMTP id c77mr12445073wmd.154.1521994039580; Sun, 25 Mar 2018 09:07:19 -0700 (PDT) Received: from localhost.localdomain ([2a01:c50e:5126:7a00:bd6c:45b8:67f:9f14]) by smtp.gmail.com with ESMTPSA id 67sm15359867wmq.17.2018.03.25.09.07.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 25 Mar 2018 09:07:18 -0700 (PDT) From: Rodrigo Rivas Costa To: Benjamin Tissoires , "Pierre-Loup A. Griffais" , =?UTF-8?q?Cl=C3=A9ment=20VUCHENER?= , Jiri Kosina , Cameron Gutman , lkml , linux-input Cc: Rodrigo Rivas Costa Subject: [PATCH v7 1/2] HID: add driver for Valve Steam Controller Date: Sun, 25 Mar 2018 18:07:02 +0200 Message-Id: <20180325160703.15997-2-rodrigorivascosta@gmail.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180325160703.15997-1-rodrigorivascosta@gmail.com> References: <20180325160703.15997-1-rodrigorivascosta@gmail.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There are two ways to connect the Steam Controller: directly to the USB or with the USB wireless adapter. Both methods are similar, but the wireless adapter can connect up to 4 devices at the same time. The wired device will appear as 3 interfaces: a virtual mouse, a virtual keyboard and a custom HID device. The wireless device will appear as 5 interfaces: a virtual keyboard and 4 custom HID devices, that will remain silent until a device is actually connected. The custom HID device has a report descriptor with all vendor specific usages, so the hid-generic is not very useful. In a PC/SteamBox Valve Steam Client provices a software translation by using hidraw and a creates a uinput virtual gamepad and XTest keyboard/mouse. This driver intercepts the hidraw usage, so it can get out of the way when the Steam Client is in use. Signed-off-by: Rodrigo Rivas Costa --- drivers/hid/Kconfig | 8 + drivers/hid/Makefile | 1 + drivers/hid/hid-ids.h | 4 + drivers/hid/hid-steam.c | 840 ++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/hid.h | 1 + 5 files changed, 854 insertions(+) create mode 100644 drivers/hid/hid-steam.c diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 779c5ae47f36..de5f4849bfe4 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -811,6 +811,14 @@ config HID_SPEEDLINK ---help--- Support for Speedlink Vicious and Divine Cezanne mouse. +config HID_STEAM + tristate "Steam Controller support" + depends on HID + ---help--- + Say Y here if you have a Steam Controller if you want to use it + without running the Steam Client. It supports both the wired and + the wireless adaptor. + config HID_STEELSERIES tristate "Steelseries SRW-S1 steering wheel support" depends on HID diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 235bd2a7b333..e146c257285a 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -94,6 +94,7 @@ obj-$(CONFIG_HID_SAMSUNG) += hid-samsung.o obj-$(CONFIG_HID_SMARTJOYPLUS) += hid-sjoy.o obj-$(CONFIG_HID_SONY) += hid-sony.o obj-$(CONFIG_HID_SPEEDLINK) += hid-speedlink.o +obj-$(CONFIG_HID_STEAM) += hid-steam.o obj-$(CONFIG_HID_STEELSERIES) += hid-steelseries.o obj-$(CONFIG_HID_SUNPLUS) += hid-sunplus.o obj-$(CONFIG_HID_GREENASIA) += hid-gaff.o diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index a0baa5ba5b84..3014991e5d4b 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -987,6 +987,10 @@ #define USB_VENDOR_ID_STANTUM_SITRONIX 0x1403 #define USB_DEVICE_ID_MTP_SITRONIX 0x5001 +#define USB_VENDOR_ID_VALVE 0x28de +#define USB_DEVICE_ID_STEAM_CONTROLLER 0x1102 +#define USB_DEVICE_ID_STEAM_CONTROLLER_WIRELESS 0x1142 + #define USB_VENDOR_ID_STEELSERIES 0x1038 #define USB_DEVICE_ID_STEELSERIES_SRWS1 0x1410 diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c new file mode 100644 index 000000000000..3504d2e2d0e5 --- /dev/null +++ b/drivers/hid/hid-steam.c @@ -0,0 +1,840 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * HID driver for Valve Steam Controller + * + * Copyright (c) 2018 Rodrigo Rivas Costa + * + * Supports both the wired and wireless interfaces. + * + * This controller has a builtin emulation of mouse and keyboard: the right pad + * can be used as a mouse, the shoulder buttons are mouse buttons, A and B + * buttons are ENTER and ESCAPE, and so on. This is implemented as additional + * HID interfaces. + * + * This is known as the "lizard mode", because apparently lizards like to use + * the computer from the coach, without a proper mouse and keyboard. + * + * This driver will disable the lizard mode when the input device is opened + * and re-enable it when the input device is closed, so as not to break user + * mode behaviour. The lizard_mode parameter can be used to change that. + * + * There are a few user space applications (notably Steam Client) that use + * the hidraw interface directly to create input devices (XTest, uinput...). + * In order to avoid breaking them this driver creates a layered hidraw device, + * so it can detect when the client is running and then: + * - it will not send any command to the controller. + * - this input device will be disabled, to avoid double input of the same + * user action. + * + * For additional functions, such as changing the right-pad margin or switching + * the led, you can use the user-space tool at: + * + * https://github.com/rodrigorc/steamctrl + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "hid-ids.h" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Rodrigo Rivas Costa "); + +static int lizard_mode = 1; +module_param(lizard_mode, int, 0644); +MODULE_PARM_DESC(lizard_mode, + "Mouse and keyboard emulation (0 = always disabled; " + "1 (default): enabled when gamepad is not in use; " + "2: let userspace decide)"); + +#define STEAM_QUIRK_WIRELESS BIT(0) + +#define STEAM_SERIAL_LEN 10 +/* Touch pads are 40 mm in diameter and 65535 units */ +#define STEAM_PAD_RESOLUTION 1638 +/* Trigger runs are about 5 mm and 256 units */ +#define STEAM_TRIGGER_RESOLUTION 51 +/* Joystick runs are about 5 mm and 256 units */ +#define STEAM_JOYSTICK_RESOLUTION 51 + +#define STEAM_PAD_FUZZ 256 + +struct steam_device { + spinlock_t lock; + struct hid_device *hdev, *client_hdev; + struct mutex mutex; + bool client_opened, input_opened; + struct input_dev __rcu *input; + unsigned long quirks; + struct work_struct work_connect; + bool connected; + char serial_no[STEAM_SERIAL_LEN + 1]; +}; + +static int steam_recv_report(struct steam_device *steam, + u8 *data, int size) +{ + struct hid_report *r; + u8 *buf; + int ret; + + r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0]; + if (hid_report_len(r) < 64) + return -EINVAL; + + buf = hid_alloc_report_buf(r, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + /* + * The report ID is always 0, so strip the first byte from the output. + * hid_report_len() is not counting the report ID, so +1 to the length + * or else we get a EOVERFLOW. We are safe from a buffer overflow + * because hid_alloc_report_buf() allocates +7 bytes. + */ + ret = hid_hw_raw_request(steam->hdev, 0x00, + buf, hid_report_len(r) + 1, + HID_FEATURE_REPORT, HID_REQ_GET_REPORT); + if (ret > 0) + memcpy(data, buf + 1, min(size, ret - 1)); + kfree(buf); + return ret; +} + +static int steam_send_report(struct steam_device *steam, + u8 *cmd, int size) +{ + struct hid_report *r; + u8 *buf; + unsigned int retries = 10; + int ret; + + r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0]; + if (hid_report_len(r) < 64) + return -EINVAL; + + buf = hid_alloc_report_buf(r, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + /* The report ID is always 0 */ + memcpy(buf + 1, cmd, size); + + /* + * Sometimes the wireless controller fails with EPIPE + * when sending a feature report. + * Doing a HID_REQ_GET_REPORT and waiting for a while + * seems to fix that. + */ + do { + ret = hid_hw_raw_request(steam->hdev, 0, + buf, size + 1, + HID_FEATURE_REPORT, HID_REQ_SET_REPORT); + if (ret != -EPIPE) + break; + steam_recv_report(steam, NULL, 0); + msleep(50); + } while (--retries); + + kfree(buf); + if (ret < 0) + hid_err(steam->hdev, "%s: error %d (%*ph)\n", __func__, + ret, size, cmd); + return ret; +} + +static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd) +{ + return steam_send_report(steam, &cmd, 1); +} + +static inline int steam_write_register(struct steam_device *steam, + u8 reg, u16 value) +{ + u8 cmd[] = {0x87, 0x03, reg, value & 0xFF, value >> 8}; + + return steam_send_report(steam, cmd, sizeof(cmd)); +} + +static int steam_get_serial(struct steam_device *steam) +{ + /* + * Send: 0xae 0x15 0x01 + * Recv: 0xae 0x15 0x01 serialnumber (10 chars) + */ + int ret; + u8 cmd[] = {0xae, 0x15, 0x01}; + u8 reply[3 + STEAM_SERIAL_LEN + 1]; + + ret = steam_send_report(steam, cmd, sizeof(cmd)); + if (ret < 0) + return ret; + ret = steam_recv_report(steam, reply, sizeof(reply)); + if (ret < 0) + return ret; + reply[3 + STEAM_SERIAL_LEN] = 0; + strlcpy(steam->serial_no, reply + 3, sizeof(steam->serial_no)); + return 0; +} + +/* + * This command requests the wireless adaptor to post an event + * with the connection status. Useful if this driver is loaded when + * the controller is already connected. + */ +static inline int steam_request_conn_status(struct steam_device *steam) +{ + return steam_send_report_byte(steam, 0xb4); +} + +static void steam_set_lizard_mode(struct steam_device *steam, bool enable) +{ + if (enable) { + /* enable esc, enter, cursors */ + steam_send_report_byte(steam, 0x85); + /* enable mouse */ + steam_send_report_byte(steam, 0x8e); + } else { + /* disable esc, enter, cursor */ + steam_send_report_byte(steam, 0x81); + /* disable mouse */ + steam_write_register(steam, 0x08, 0x07); + } +} + +static int steam_input_open(struct input_dev *dev) +{ + struct steam_device *steam = input_get_drvdata(dev); + int ret; + + ret = hid_hw_open(steam->hdev); + if (ret) + return ret; + + mutex_lock(&steam->mutex); + steam->input_opened = true; + if (!steam->client_opened && lizard_mode == 1) + steam_set_lizard_mode(steam, false); + mutex_unlock(&steam->mutex); + return 0; +} + +static void steam_input_close(struct input_dev *dev) +{ + struct steam_device *steam = input_get_drvdata(dev); + + hid_hw_close(steam->hdev); + + mutex_lock(&steam->mutex); + steam->input_opened = false; + if (!steam->client_opened && lizard_mode == 1) + steam_set_lizard_mode(steam, true); + mutex_unlock(&steam->mutex); +} + +static int steam_register(struct steam_device *steam) +{ + struct hid_device *hdev = steam->hdev; + struct input_dev *input; + int ret; + + rcu_read_lock(); + input = rcu_dereference(steam->input); + rcu_read_unlock(); + if (input) { + dbg_hid("%s: already connected\n", __func__); + return 0; + } + + ret = steam_get_serial(steam); + if (ret) + return ret; + + hid_info(hdev, "Steam Controller '%s' connected", + steam->serial_no); + + input = input_allocate_device(); + if (!input) + return -ENOMEM; + + input_set_drvdata(input, steam); + input->dev.parent = &hdev->dev; + input->open = steam_input_open; + input->close = steam_input_close; + + input->name = (steam->quirks & STEAM_QUIRK_WIRELESS) ? + "Wireless Steam Controller" : + "Steam Controller"; + input->phys = hdev->phys; + input->uniq = steam->serial_no; + input->id.bustype = hdev->bus; + input->id.vendor = hdev->vendor; + input->id.product = hdev->product; + input->id.version = hdev->version; + + input_set_capability(input, EV_KEY, BTN_TR2); + input_set_capability(input, EV_KEY, BTN_TL2); + input_set_capability(input, EV_KEY, BTN_TR); + input_set_capability(input, EV_KEY, BTN_TL); + input_set_capability(input, EV_KEY, BTN_Y); + input_set_capability(input, EV_KEY, BTN_B); + input_set_capability(input, EV_KEY, BTN_X); + input_set_capability(input, EV_KEY, BTN_A); + input_set_capability(input, EV_KEY, BTN_DPAD_UP); + input_set_capability(input, EV_KEY, BTN_DPAD_RIGHT); + input_set_capability(input, EV_KEY, BTN_DPAD_LEFT); + input_set_capability(input, EV_KEY, BTN_DPAD_DOWN); + input_set_capability(input, EV_KEY, BTN_SELECT); + input_set_capability(input, EV_KEY, BTN_MODE); + input_set_capability(input, EV_KEY, BTN_START); + input_set_capability(input, EV_KEY, BTN_GEAR_DOWN); + input_set_capability(input, EV_KEY, BTN_GEAR_UP); + input_set_capability(input, EV_KEY, BTN_THUMBR); + input_set_capability(input, EV_KEY, BTN_THUMBL); + input_set_capability(input, EV_KEY, BTN_THUMB); + input_set_capability(input, EV_KEY, BTN_THUMB2); + + input_set_abs_params(input, ABS_HAT2Y, 0, 255, 0, 0); + input_set_abs_params(input, ABS_HAT2X, 0, 255, 0, 0); + input_set_abs_params(input, ABS_X, -32767, 32767, 0, 0); + input_set_abs_params(input, ABS_Y, -32767, 32767, 0, 0); + input_set_abs_params(input, ABS_RX, -32767, 32767, + STEAM_PAD_FUZZ, 0); + input_set_abs_params(input, ABS_RY, -32767, 32767, + STEAM_PAD_FUZZ, 0); + input_set_abs_params(input, ABS_HAT0X, -32767, 32767, + STEAM_PAD_FUZZ, 0); + input_set_abs_params(input, ABS_HAT0Y, -32767, 32767, + STEAM_PAD_FUZZ, 0); + input_abs_set_res(input, ABS_X, STEAM_JOYSTICK_RESOLUTION); + input_abs_set_res(input, ABS_Y, STEAM_JOYSTICK_RESOLUTION); + input_abs_set_res(input, ABS_RX, STEAM_PAD_RESOLUTION); + input_abs_set_res(input, ABS_RY, STEAM_PAD_RESOLUTION); + input_abs_set_res(input, ABS_HAT0X, STEAM_PAD_RESOLUTION); + input_abs_set_res(input, ABS_HAT0Y, STEAM_PAD_RESOLUTION); + input_abs_set_res(input, ABS_HAT2Y, STEAM_TRIGGER_RESOLUTION); + input_abs_set_res(input, ABS_HAT2X, STEAM_TRIGGER_RESOLUTION); + + ret = input_register_device(input); + if (ret) + goto input_register_fail; + + rcu_assign_pointer(steam->input, input); + + return 0; + +input_register_fail: + input_free_device(input); + return ret; +} + +static void steam_unregister(struct steam_device *steam) +{ + struct input_dev *input; + + rcu_read_lock(); + input = rcu_dereference(steam->input); + rcu_read_unlock(); + + if (input) { + RCU_INIT_POINTER(steam->input, NULL); + synchronize_rcu(); + hid_info(steam->hdev, "Steam Controller '%s' disconnected", + steam->serial_no); + input_unregister_device(input); + } +} + +static void steam_work_connect_cb(struct work_struct *work) +{ + struct steam_device *steam = container_of(work, struct steam_device, + work_connect); + unsigned long flags; + bool connected; + int ret; + + spin_lock_irqsave(&steam->lock, flags); + connected = steam->connected; + spin_unlock_irqrestore(&steam->lock, flags); + + if (connected) { + ret = steam_register(steam); + if (ret) { + hid_err(steam->hdev, + "%s:steam_register failed with error %d\n", + __func__, ret); + } + } else { + steam_unregister(steam); + } +} + +static bool steam_is_valve_interface(struct hid_device *hdev) +{ + struct hid_report_enum *rep_enum; + + /* + * The wired device creates 3 interfaces: + * 0: emulated mouse. + * 1: emulated keyboard. + * 2: the real game pad. + * The wireless device creates 5 interfaces: + * 0: emulated keyboard. + * 1-4: slots where up to 4 real game pads will be connected to. + * We know which one is the real gamepad interface because they are the + * only ones with a feature report. + */ + rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; + return !list_empty(&rep_enum->report_list); +} + +static int steam_client_ll_parse(struct hid_device *hdev) +{ + return 0; +} + +static int steam_client_ll_start(struct hid_device *hdev) +{ + return 0; +} + +static void steam_client_ll_stop(struct hid_device *hdev) +{ +} + +static int steam_client_ll_open(struct hid_device *hdev) +{ + struct steam_device *steam = hid_get_drvdata(hdev); + int ret; + + ret = hid_hw_open(steam->hdev); + if (ret) + return ret; + + mutex_lock(&steam->mutex); + steam->client_opened = true; + mutex_unlock(&steam->mutex); + return ret; +} + +static void steam_client_ll_close(struct hid_device *hdev) +{ + struct steam_device *steam = hid_get_drvdata(hdev); + + hid_hw_close(steam->hdev); + + mutex_lock(&steam->mutex); + steam->client_opened = false; + if (lizard_mode != 2) { + if (steam->input_opened) + steam_set_lizard_mode(steam, false); + else + steam_set_lizard_mode(steam, lizard_mode); + } + mutex_unlock(&steam->mutex); +} + +static int steam_client_ll_raw_request(struct hid_device *hdev, + unsigned char reportnum, u8 *buf, + size_t count, unsigned char report_type, + int reqtype) +{ + struct steam_device *steam = hid_get_drvdata(hdev); + + return hid_hw_raw_request(steam->hdev, reportnum, buf, count, + report_type, reqtype); +} + +static struct hid_ll_driver steam_client_ll_driver = { + .parse = steam_client_ll_parse, + .start = steam_client_ll_start, + .stop = steam_client_ll_stop, + .open = steam_client_ll_open, + .close = steam_client_ll_close, + .raw_request = steam_client_ll_raw_request, +}; + +static int steam_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct steam_device *steam; + struct hid_device *client_hdev; + int ret; + + ret = hid_parse(hdev); + if (ret) { + hid_err(hdev, + "%s:parse of hid interface failed\n", __func__); + return ret; + } + + /* + * The non-valve interfaces (mouse and keyboard emulation) and + * the client_hid are connected without changes. + */ + if (hdev->group == HID_GROUP_STEAM || + !steam_is_valve_interface(hdev)) { + return hid_hw_start(hdev, HID_CONNECT_DEFAULT); + } + + /* + * With the real steam controller interface, do not connect hidraw. + * Instead, create the client_hid and connect that. + */ + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDRAW); + if (ret) + return ret; + + client_hdev = hid_allocate_device(); + if (IS_ERR(client_hdev)) { + ret = PTR_ERR(client_hdev); + goto client_hdev_fail; + } + + client_hdev->ll_driver = &steam_client_ll_driver; + client_hdev->dev.parent = hdev->dev.parent; + client_hdev->bus = hdev->bus; + client_hdev->vendor = hdev->vendor; + client_hdev->product = hdev->product; + strlcpy(client_hdev->name, hdev->name, + sizeof(client_hdev->name)); + strlcpy(client_hdev->phys, hdev->phys, + sizeof(client_hdev->phys)); + client_hdev->dev_rdesc = kmemdup(hdev->dev_rdesc, + hdev->dev_rsize, GFP_KERNEL); + client_hdev->dev_rsize = hdev->dev_rsize; + /* + * Since we use the same device info than the real interface to + * trick userspace, we will be calling steam_probe recursively. + * We need to recognize the client interface somehow. + */ + client_hdev->group = HID_GROUP_STEAM; + + ret = hid_add_device(client_hdev); + if (ret) + goto client_hdev_add_fail; + + steam = devm_kzalloc(&hdev->dev, sizeof(*steam), GFP_KERNEL); + if (!steam) { + ret = -ENOMEM; + goto steam_alloc_fail; + } + + steam->client_hdev = client_hdev; + hid_set_drvdata(client_hdev, steam); + + spin_lock_init(&steam->lock); + mutex_init(&steam->mutex); + steam->hdev = hdev; + hid_set_drvdata(hdev, steam); + steam->quirks = id->driver_data; + INIT_WORK(&steam->work_connect, steam_work_connect_cb); + + if (steam->quirks & STEAM_QUIRK_WIRELESS) { + ret = hid_hw_open(hdev); + if (ret) { + hid_err(hdev, + "%s:hid_hw_open for wireless\n", + __func__); + goto hid_hw_open_fail; + } + hid_info(hdev, "Steam wireless receiver connected"); + steam_request_conn_status(steam); + } else { + ret = steam_register(steam); + if (ret) { + hid_err(hdev, + "%s:steam_register failed with error %d\n", + __func__, ret); + goto input_register_fail; + } + } + if (lizard_mode != 2) + steam_set_lizard_mode(steam, lizard_mode); + + return 0; + +input_register_fail: +hid_hw_open_fail: + cancel_work_sync(&steam->work_connect); + hid_set_drvdata(hdev, NULL); +steam_alloc_fail: + hid_hw_stop(client_hdev); +client_hdev_add_fail: + hid_destroy_device(client_hdev); +client_hdev_fail: + hid_err(hdev, "%s: failed with error %d\n", + __func__, ret); + return 0; +} + +static void steam_remove(struct hid_device *hdev) +{ + struct steam_device *steam = hid_get_drvdata(hdev); + + if (hdev->group == HID_GROUP_STEAM) + return; + + if (!steam) { + hid_hw_stop(hdev); + return; + } + + if (steam->quirks & STEAM_QUIRK_WIRELESS) { + hid_info(hdev, "Steam wireless receiver disconnected"); + hid_hw_close(hdev); + } + hid_hw_stop(hdev); + cancel_work_sync(&steam->work_connect); + hid_hw_stop(steam->client_hdev); + hid_destroy_device(steam->client_hdev); + steam_unregister(steam); +} + +static void steam_do_connect_event(struct steam_device *steam, bool connected) +{ + unsigned long flags; + + spin_lock_irqsave(&steam->lock, flags); + steam->connected = connected; + spin_unlock_irqrestore(&steam->lock, flags); + + if (schedule_work(&steam->work_connect) == 0) + dbg_hid("%s: connected=%d event already queued\n", + __func__, connected); +} + +/* + * The size for this message payload is 60. + * The known values are: + * (* values are not sent through wireless) + * (* accelerator/gyro is disabled by default) + * Offset| Type | Mapped to |Meaning + * -------+-------+-----------+-------------------------- + * 4-7 | u32 | -- | sequence number + * 8-10 | 24bit | see below | buttons + * 11 | u8 | ABS_HAT2Y | left trigger + * 12 | u8 | ABS_HAT2X | right trigger + * 13-15 | -- | -- | always 0 + * 16-17 | s16 | ABS_X/ABS_HAT0X | X value + * 18-19 | s16 | ABS_Y/ABS_HAT0Y | Y value + * 20-21 | s16 | ABS_RX | right-pad X value + * 22-23 | s16 | ABS_RY | right-pad Y value + * 24-25 | s16 | -- | * left trigger + * 26-27 | s16 | -- | * right trigger + * 28-29 | s16 | -- | * accelerometer X value + * 30-31 | s16 | -- | * accelerometer Y value + * 32-33 | s16 | -- | * accelerometer Z value + * 34-35 | s16 | -- | gyro X value + * 36-36 | s16 | -- | gyro Y value + * 38-39 | s16 | -- | gyro Z value + * 40-41 | s16 | -- | quaternion W value + * 42-43 | s16 | -- | quaternion X value + * 44-45 | s16 | -- | quaternion Y value + * 46-47 | s16 | -- | quaternion Z value + * 48-49 | -- | -- | always 0 + * 50-51 | s16 | -- | * left trigger (uncalibrated) + * 52-53 | s16 | -- | * right trigger (uncalibrated) + * 54-55 | s16 | -- | * joystick X value (uncalibrated) + * 56-57 | s16 | -- | * joystick Y value (uncalibrated) + * 58-59 | s16 | -- | * left-pad X value + * 60-61 | s16 | -- | * left-pad Y value + * 62-63 | u16 | -- | * battery voltage + * + * The buttons are: + * Bit | Mapped to | Description + * ------+------------+-------------------------------- + * 8.0 | BTN_TR2 | right trigger fully pressed + * 8.1 | BTN_TL2 | left trigger fully pressed + * 8.2 | BTN_TR | right shoulder + * 8.3 | BTN_TL | left shoulder + * 8.4 | BTN_Y | button Y + * 8.5 | BTN_B | button B + * 8.6 | BTN_X | button X + * 8.7 | BTN_A | button A + * 9.0 | BTN_DPAD_UP | lef-pad up + * 9.1 | BTN_DPAD_RIGHT | lef-pad right + * 9.2 | BTN_DPAD_LEFT | lef-pad left + * 9.3 | BTN_DPAD_DOWN | lef-pad down + * 9.4 | BTN_SELECT | menu left + * 9.5 | BTN_MODE | steam logo + * 9.6 | BTN_START | menu right + * 9.7 | BTN_GEAR_DOWN | left back lever + * 10.0 | BTN_GEAR_UP | right back lever + * 10.1 | -- | left-pad clicked + * 10.2 | BTN_THUMBR | right-pad clicked + * 10.3 | BTN_THUMB | left-pad touched (but see explanation below) + * 10.4 | BTN_THUMB2 | right-pad touched + * 10.5 | -- | unknown + * 10.6 | BTN_THUMBL | joystick clicked + * 10.7 | -- | lpad_and_joy + */ + +static void steam_do_input_event(struct steam_device *steam, + struct input_dev *input, u8 *data) +{ + /* 24 bits of buttons */ + u8 b8, b9, b10; + bool lpad_touched, lpad_and_joy; + + b8 = data[8]; + b9 = data[9]; + b10 = data[10]; + + input_report_abs(input, ABS_HAT2Y, data[11]); + input_report_abs(input, ABS_HAT2X, data[12]); + + /* + * These two bits tells how to interpret the values X and Y. + * lpad_and_joy tells that the joystick and the lpad are used at the + * same time. + * lpad_touched tells whether X/Y are to be read as lpad coord or + * joystick values. + * (lpad_touched || lpad_and_joy) tells if the lpad is really touched. + */ + lpad_touched = b10 & BIT(3); + lpad_and_joy = b10 & BIT(7); + input_report_abs(input, lpad_touched ? ABS_HAT0X : ABS_X, + (s16) le16_to_cpup((__le16 *)(data + 16))); + input_report_abs(input, lpad_touched ? ABS_HAT0Y : ABS_Y, + -(s16) le16_to_cpup((__le16 *)(data + 18))); + /* Check if joystick is centered */ + if (lpad_touched && !lpad_and_joy) { + input_report_abs(input, ABS_X, 0); + input_report_abs(input, ABS_Y, 0); + } + /* Check if lpad is untouched */ + if (!(lpad_touched || lpad_and_joy)) { + input_report_abs(input, ABS_HAT0X, 0); + input_report_abs(input, ABS_HAT0Y, 0); + } + + input_report_abs(input, ABS_RX, + (s16) le16_to_cpup((__le16 *)(data + 20))); + input_report_abs(input, ABS_RY, + -(s16) le16_to_cpup((__le16 *)(data + 22))); + + input_event(input, EV_KEY, BTN_TR2, !!(b8 & BIT(0))); + input_event(input, EV_KEY, BTN_TL2, !!(b8 & BIT(1))); + input_event(input, EV_KEY, BTN_TR, !!(b8 & BIT(2))); + input_event(input, EV_KEY, BTN_TL, !!(b8 & BIT(3))); + input_event(input, EV_KEY, BTN_Y, !!(b8 & BIT(4))); + input_event(input, EV_KEY, BTN_B, !!(b8 & BIT(5))); + input_event(input, EV_KEY, BTN_X, !!(b8 & BIT(6))); + input_event(input, EV_KEY, BTN_A, !!(b8 & BIT(7))); + input_event(input, EV_KEY, BTN_DPAD_UP, !!(b9 & BIT(0))); + input_event(input, EV_KEY, BTN_DPAD_RIGHT, !!(b9 & BIT(1))); + input_event(input, EV_KEY, BTN_DPAD_LEFT, !!(b9 & BIT(2))); + input_event(input, EV_KEY, BTN_DPAD_DOWN, !!(b9 & BIT(3))); + input_event(input, EV_KEY, BTN_SELECT, !!(b9 & BIT(4))); + input_event(input, EV_KEY, BTN_MODE, !!(b9 & BIT(5))); + input_event(input, EV_KEY, BTN_START, !!(b9 & BIT(6))); + input_event(input, EV_KEY, BTN_GEAR_DOWN, !!(b9 & BIT(7))); + input_event(input, EV_KEY, BTN_GEAR_UP, !!(b10 & BIT(0))); + input_event(input, EV_KEY, BTN_THUMBR, !!(b10 & BIT(2))); + input_event(input, EV_KEY, BTN_THUMBL, !!(b10 & BIT(6))); + input_event(input, EV_KEY, BTN_THUMB, lpad_touched || lpad_and_joy); + input_event(input, EV_KEY, BTN_THUMB2, !!(b10 & BIT(4))); + + input_sync(input); +} + +static int steam_raw_event(struct hid_device *hdev, + struct hid_report *report, u8 *data, + int size) +{ + struct steam_device *steam = hid_get_drvdata(hdev); + struct input_dev *input; + + if (!steam) + return 0; + + if (steam->client_opened) + hid_input_report(steam->client_hdev, HID_FEATURE_REPORT, + data, size, 0); + /* + * All messages are size=64, all values little-endian. + * The format is: + * Offset| Meaning + * -------+-------------------------------------------- + * 0-1 | always 0x01, 0x00, maybe protocol version? + * 2 | type of message + * 3 | length of the real payload (not checked) + * 4-n | payload data, depends on the type + * + * There are these known types of message: + * 0x01: input data (60 bytes) + * 0x03: wireless connect/disconnect (1 byte) + * 0x04: battery status (11 bytes) + */ + + if (size != 64 || data[0] != 1 || data[1] != 0) + return 0; + + switch (data[2]) { + case 0x01: + if (steam->client_opened) + return 0; + rcu_read_lock(); + input = rcu_dereference(steam->input); + if (likely(input)) { + steam_do_input_event(steam, input, data); + } else { + dbg_hid("%s: input data without connect event\n", + __func__); + steam_do_connect_event(steam, true); + } + rcu_read_unlock(); + break; + case 0x03: + /* + * The payload of this event is a single byte: + * 0x01: disconnected. + * 0x02: connected. + */ + switch (data[4]) { + case 0x01: + steam_do_connect_event(steam, false); + break; + case 0x02: + steam_do_connect_event(steam, true); + break; + } + break; + case 0x04: + /* TODO: battery status */ + break; + } + return 0; +} + +static const struct hid_device_id steam_controllers[] = { + { /* Wired Steam Controller */ + HID_USB_DEVICE(USB_VENDOR_ID_VALVE, + USB_DEVICE_ID_STEAM_CONTROLLER) + }, + { /* Wireless Steam Controller */ + HID_USB_DEVICE(USB_VENDOR_ID_VALVE, + USB_DEVICE_ID_STEAM_CONTROLLER_WIRELESS), + .driver_data = STEAM_QUIRK_WIRELESS + }, + {} +}; + +MODULE_DEVICE_TABLE(hid, steam_controllers); + +static struct hid_driver steam_controller_driver = { + .name = "hid-steam", + .id_table = steam_controllers, + .probe = steam_probe, + .remove = steam_remove, + .raw_event = steam_raw_event, +}; + +module_hid_driver(steam_controller_driver); diff --git a/include/linux/hid.h b/include/linux/hid.h index d491027a7c22..5e5d76589954 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -364,6 +364,7 @@ struct hid_item { #define HID_GROUP_RMI 0x0100 #define HID_GROUP_WACOM 0x0101 #define HID_GROUP_LOGITECH_DJ_DEVICE 0x0102 +#define HID_GROUP_STEAM 0x0103 /* * HID protocol status