From patchwork Mon Apr 22 03:12:49 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Life is hard, and then you die" X-Patchwork-Id: 10910621 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AFD2F112C for ; Mon, 22 Apr 2019 03:20:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9AA3328558 for ; Mon, 22 Apr 2019 03:20:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8DDF92864E; Mon, 22 Apr 2019 03:20:05 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 D57FD28558 for ; Mon, 22 Apr 2019 03:20:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726210AbfDVDUD (ORCPT ); Sun, 21 Apr 2019 23:20:03 -0400 Received: from chill.innovation.ch ([216.218.245.220]:49766 "EHLO chill.innovation.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726195AbfDVDUD (ORCPT ); Sun, 21 Apr 2019 23:20:03 -0400 X-Greylist: delayed 425 seconds by postgrey-1.27 at vger.kernel.org; Sun, 21 Apr 2019 23:20:02 EDT Received: from localhost (localhost [127.0.0.1]) by chill.innovation.ch (Postfix) with ESMTP id DB475640151; Sun, 21 Apr 2019 20:12:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at Received: from chill.innovation.ch ([127.0.0.1]) by localhost (chill.innovation.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 4uvSf5JD7u5l; Sun, 21 Apr 2019 20:12:56 -0700 (PDT) From: =?utf-8?q?Ronald_Tschal=C3=A4r?= DKIM-Filter: OpenDKIM Filter v2.10.3 chill.innovation.ch 6658164011E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=innovation.ch; s=default; t=1555902776; bh=QaUwuKQjyRTlLoPs7B+HW5V+KgrVlzp3c+GNEYZEgOs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fV9Lfg/S8qxrSObsnnCQyBQpzP6BPiToBer4D3YZ4vA7fPqJu05+O/uwOaddqRyw3 2iKRmzwesMvx1PonOKUCaEVnUUY6WNL8fDDPIeVpuZrtxN04dvXqhFq3Lj0I3HfiwC gv5OqFYR+flw5cGz0dtVlPKurTlUuySB5PwtiQvVzB3io/fewKpU2H/RYgPsb5RTou Lv8Cjh+SXMiUTjGkodC/mjzDJE1XhCgAfEa4VsppTvHI06xVrBPce9Y6y4yC68NqNr vmUCq6nc70ne/YpWnqg9vzrJMIleNUNYZocRE/giNyebzxb+s3aX2dUAGDo6xAxhxk plIBh1Afct12A== To: Jiri Kosina , Benjamin Tissoires , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Lee Jones Cc: linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] mfd: apple-ibridge: Add Apple iBridge MFD driver. Date: Sun, 21 Apr 2019 20:12:49 -0700 Message-Id: <20190422031251.11968-2-ronald@innovation.ch> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190422031251.11968-1-ronald@innovation.ch> References: <20190422031251.11968-1-ronald@innovation.ch> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The iBridge device provides access to several devices, including: - the Touch Bar - the iSight webcam - the light sensor - the fingerprint sensor This driver provides the core support for managing the iBridge device and the access to the underlying devices. In particular, since the functionality for the touch bar and light sensor is exposed via USB HID interfaces, and the same HID device is used for multiple functions, this driver provides a multiplexing layer that allows multiple HID drivers to be registered for a given HID device. This allows the touch bar and ALS driver to be separated out into their own modules. Signed-off-by: Ronald Tschalär --- drivers/mfd/Kconfig | 15 + drivers/mfd/Makefile | 1 + drivers/mfd/apple-ibridge.c | 883 ++++++++++++++++++++++++++++++ include/linux/mfd/apple-ibridge.h | 39 ++ 4 files changed, 938 insertions(+) create mode 100644 drivers/mfd/apple-ibridge.c create mode 100644 include/linux/mfd/apple-ibridge.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 76f9909cf396..d55fa77faacf 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1916,5 +1916,20 @@ config RAVE_SP_CORE Select this to get support for the Supervisory Processor device found on several devices in RAVE line of hardware. +config MFD_APPLE_IBRIDGE + tristate "Apple iBridge chip" + depends on ACPI + depends on USB_HID + depends on X86 || COMPILE_TEST + select MFD_CORE + help + This MFD provides the core support for the Apple iBridge chip + found on recent MacBookPro's. The drivers for the Touch Bar + (apple-ib-tb) and light sensor (apple-ib-als) need to be + enabled separately. + + To compile this driver as a module, choose M here: the + module will be called apple-ibridge. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 12980a4ad460..c364e0e9d313 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -241,4 +241,5 @@ obj-$(CONFIG_MFD_MXS_LRADC) += mxs-lradc.o obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc27xx-spi.o obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o +obj-$(CONFIG_MFD_APPLE_IBRIDGE) += apple-ibridge.o diff --git a/drivers/mfd/apple-ibridge.c b/drivers/mfd/apple-ibridge.c new file mode 100644 index 000000000000..56d325396961 --- /dev/null +++ b/drivers/mfd/apple-ibridge.c @@ -0,0 +1,883 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Apple iBridge Driver + * + * Copyright (c) 2018 Ronald Tschalär + */ + +/** + * MacBookPro models with a Touch Bar (13,[23] and 14,[23]) have an Apple + * iBridge chip (also known as T1 chip) which exposes the touch bar, + * built-in webcam (iSight), ambient light sensor, and Secure Enclave + * Processor (SEP) for TouchID. It shows up in the system as a USB device + * with 3 configurations: 'Default iBridge Interfaces', 'Default iBridge + * Interfaces(OS X)', and 'Default iBridge Interfaces(Recovery)'. While + * the second one is used by MacOS to provide the fancy touch bar + * functionality with custom buttons etc, this driver just uses the first. + * + * In the first (default after boot) configuration, 4 usb interfaces are + * exposed: 2 related to the webcam, and 2 USB HID interfaces representing + * the touch bar and the ambient light sensor (and possibly the SEP, + * though at this point in time nothing is known about that). The webcam + * interfaces are already handled by the uvcvideo driver; furthermore, the + * handling of the input reports when "keys" on the touch bar are pressed + * is already handled properly by the generic USB HID core. This leaves + * the management of the touch bar modes (e.g. switching between function + * and special keys when the FN key is pressed), the touch bar display + * (dimming and turning off), the key-remapping when the FN key is + * pressed, and handling of the light sensor. + * + * This driver is implemented as an MFD driver, with the touch bar and ALS + * functions implemented by appropriate subdrivers (mfd cells). Because + * both those are basically hid drivers, but the current kernel driver + * structure does not allow more than one driver per device, this driver + * implements a demuxer for hid drivers: it registers itself as a hid + * driver with the core, and in turn it lets the subdrivers register + * themselves as hid drivers with this driver; the callbacks from the core + * are then forwarded to the subdrivers. + * + * Lastly, this driver also takes care of the power-management for the + * iBridge when suspending and resuming. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../hid/usbhid/usbhid.h" + +#define USB_ID_VENDOR_APPLE 0x05ac +#define USB_ID_PRODUCT_IBRIDGE 0x8600 + +#define APPLETB_BASIC_CONFIG 1 + +#define LOG_DEV(ib_dev) (&(ib_dev)->acpi_dev->dev) + +struct appleib_device { + struct acpi_device *acpi_dev; + acpi_handle asoc_socw; + struct list_head hid_drivers; + struct list_head hid_devices; + struct mfd_cell *subdevs; + struct mutex update_lock; /* protect updates to all lists */ + struct srcu_struct lists_srcu; + bool in_hid_probe; +}; + +struct appleib_hid_drv_info { + struct list_head entry; + struct hid_driver *driver; + void *driver_data; +}; + +struct appleib_hid_dev_info { + struct list_head entry; + struct list_head drivers; + struct hid_device *device; + const struct hid_device_id *device_id; + bool started; +}; + +static const struct mfd_cell appleib_subdevs[] = { + { .name = PLAT_NAME_IB_TB }, + { .name = PLAT_NAME_IB_ALS }, +}; + +static struct appleib_device *appleib_dev; + +#define call_void_driver_func(drv_info, fn, ...) \ + do { \ + if ((drv_info)->driver->fn) \ + (drv_info)->driver->fn(__VA_ARGS__); \ + } while (0) + +#define call_driver_func(drv_info, fn, ret_type, ...) \ + ({ \ + ret_type rc = 0; \ + \ + if ((drv_info)->driver->fn) \ + rc = (drv_info)->driver->fn(__VA_ARGS__); \ + \ + rc; \ + }) + +static void appleib_remove_driver(struct appleib_device *ib_dev, + struct appleib_hid_drv_info *drv_info, + struct appleib_hid_dev_info *dev_info) +{ + list_del_rcu(&drv_info->entry); + synchronize_srcu(&ib_dev->lists_srcu); + + call_void_driver_func(drv_info, remove, dev_info->device); + + kfree(drv_info); +} + +static int appleib_probe_driver(struct appleib_hid_drv_info *drv_info, + struct appleib_hid_dev_info *dev_info) +{ + struct appleib_hid_drv_info *d; + int rc = 0; + + rc = call_driver_func(drv_info, probe, int, dev_info->device, + dev_info->device_id); + if (rc) + return rc; + + d = kmemdup(drv_info, sizeof(*drv_info), GFP_KERNEL); + if (!d) { + call_void_driver_func(drv_info, remove, dev_info->device); + return -ENOMEM; + } + + list_add_tail_rcu(&d->entry, &dev_info->drivers); + return 0; +} + +static void appleib_remove_driver_attachments(struct appleib_device *ib_dev, + struct appleib_hid_dev_info *dev_info, + struct hid_driver *driver) +{ + struct appleib_hid_drv_info *drv_info; + struct appleib_hid_drv_info *tmp; + + list_for_each_entry_safe(drv_info, tmp, &dev_info->drivers, entry) { + if (!driver || drv_info->driver == driver) + appleib_remove_driver(ib_dev, drv_info, dev_info); + } +} + +/* + * Find all devices that are attached to this driver and detach them. + * + * Note: this must be run with update_lock held. + */ +static void appleib_detach_devices(struct appleib_device *ib_dev, + struct hid_driver *driver) +{ + struct appleib_hid_dev_info *dev_info; + + list_for_each_entry(dev_info, &ib_dev->hid_devices, entry) + appleib_remove_driver_attachments(ib_dev, dev_info, driver); +} + +/* + * Find all drivers that are attached to this device and detach them. + * + * Note: this must be run with update_lock held. + */ +static void appleib_detach_drivers(struct appleib_device *ib_dev, + struct appleib_hid_dev_info *dev_info) +{ + appleib_remove_driver_attachments(ib_dev, dev_info, NULL); +} + +/** + * Unregister a previously registered HID driver from us. + * @ib_dev: the appleib_device from which to unregister the driver + * @driver: the driver to unregister + */ +int appleib_unregister_hid_driver(struct appleib_device *ib_dev, + struct hid_driver *driver) +{ + struct appleib_hid_drv_info *drv_info; + + mutex_lock(&ib_dev->update_lock); + + list_for_each_entry(drv_info, &ib_dev->hid_drivers, entry) { + if (drv_info->driver == driver) { + appleib_detach_devices(ib_dev, driver); + list_del_rcu(&drv_info->entry); + mutex_unlock(&ib_dev->update_lock); + synchronize_srcu(&ib_dev->lists_srcu); + kfree(drv_info); + dev_info(LOG_DEV(ib_dev), "unregistered driver '%s'\n", + driver->name); + return 0; + } + } + + mutex_unlock(&ib_dev->update_lock); + + return -ENOENT; +} +EXPORT_SYMBOL_GPL(appleib_unregister_hid_driver); + +static int appleib_start_hid_events(struct appleib_hid_dev_info *dev_info) +{ + struct hid_device *hdev = dev_info->device; + int rc; + + rc = hid_connect(hdev, HID_CONNECT_DEFAULT); + if (rc) { + hid_err(hdev, "ib: hid connect failed (%d)\n", rc); + return rc; + } + + rc = hid_hw_open(hdev); + if (rc) { + hid_err(hdev, "ib: failed to open hid: %d\n", rc); + hid_disconnect(hdev); + } + + if (!rc) + dev_info->started = true; + + return rc; +} + +static void appleib_stop_hid_events(struct appleib_hid_dev_info *dev_info) +{ + if (dev_info->started) { + hid_hw_close(dev_info->device); + hid_disconnect(dev_info->device); + dev_info->started = false; + } +} + +/** + * Register a HID driver with us. + * @ib_dev: the appleib_device with which to register the driver + * @driver: the driver to register + * @data: the driver-data to associate with the driver; this is available + * from appleib_get_drvdata(...). + */ +int appleib_register_hid_driver(struct appleib_device *ib_dev, + struct hid_driver *driver, void *data) +{ + struct appleib_hid_drv_info *drv_info; + struct appleib_hid_dev_info *dev_info; + int rc; + + if (!driver->probe) + return -EINVAL; + + drv_info = kzalloc(sizeof(*drv_info), GFP_KERNEL); + if (!drv_info) + return -ENOMEM; + + drv_info->driver = driver; + drv_info->driver_data = data; + + mutex_lock(&ib_dev->update_lock); + + list_add_tail_rcu(&drv_info->entry, &ib_dev->hid_drivers); + + list_for_each_entry(dev_info, &ib_dev->hid_devices, entry) { + appleib_stop_hid_events(dev_info); + + appleib_probe_driver(drv_info, dev_info); + + rc = appleib_start_hid_events(dev_info); + if (rc) + appleib_detach_drivers(ib_dev, dev_info); + } + + mutex_unlock(&ib_dev->update_lock); + + dev_info(LOG_DEV(ib_dev), "registered driver '%s'\n", driver->name); + + return 0; +} +EXPORT_SYMBOL_GPL(appleib_register_hid_driver); + +/** + * Get the driver-specific data associated with the given, previously + * registered HID driver (provided in the appleib_register_hid_driver() + * call). + * @ib_dev: the appleib_device with which the driver was registered + * @driver: the driver for which to get the data + */ +void *appleib_get_drvdata(struct appleib_device *ib_dev, + struct hid_driver *driver) +{ + struct appleib_hid_drv_info *drv_info; + void *drv_data = NULL; + int idx; + + idx = srcu_read_lock(&ib_dev->lists_srcu); + + list_for_each_entry_rcu(drv_info, &ib_dev->hid_drivers, entry) { + if (drv_info->driver == driver) { + drv_data = drv_info->driver_data; + break; + } + } + + srcu_read_unlock(&ib_dev->lists_srcu, idx); + + return drv_data; +} +EXPORT_SYMBOL_GPL(appleib_get_drvdata); + +/* + * Forward a hid-driver callback to all registered sub-drivers. This is for + * callbacks that return a status as an int. + * @hdev the hid-device + * @forward a function that calls the callback on the given driver + * @args arguments for the forward function + */ +static int appleib_forward_int_op(struct hid_device *hdev, + int (*forward)(struct appleib_hid_drv_info *, + struct hid_device *, void *), + void *args) +{ + struct appleib_device *ib_dev = hid_get_drvdata(hdev); + struct appleib_hid_dev_info *dev_info; + struct appleib_hid_drv_info *drv_info; + int idx; + int rc = 0; + + idx = srcu_read_lock(&ib_dev->lists_srcu); + + list_for_each_entry_rcu(dev_info, &ib_dev->hid_devices, entry) { + if (dev_info->device != hdev) + continue; + + list_for_each_entry_rcu(drv_info, &dev_info->drivers, entry) { + rc = forward(drv_info, hdev, args); + if (rc) + break; + } + + break; + } + + srcu_read_unlock(&ib_dev->lists_srcu, idx); + + return rc; +} + +struct appleib_hid_event_args { + struct hid_field *field; + struct hid_usage *usage; + __s32 value; +}; + +static int appleib_hid_event_fwd(struct appleib_hid_drv_info *drv_info, + struct hid_device *hdev, void *args) +{ + struct appleib_hid_event_args *evt_args = args; + + return call_driver_func(drv_info, event, int, hdev, evt_args->field, + evt_args->usage, evt_args->value); +} + +static int appleib_hid_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct appleib_hid_event_args args = { + .field = field, + .usage = usage, + .value = value, + }; + + return appleib_forward_int_op(hdev, appleib_hid_event_fwd, &args); +} + +static __u8 *appleib_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + /* Some fields have a size of 64 bits, which according to HID 1.11 + * Section 8.4 is not valid ("An item field cannot span more than 4 + * bytes in a report"). Furthermore, hid_field_extract() complains + * when encountering such a field. So turn them into two 32-bit fields + * instead. + */ + + if (*rsize == 634 && + /* Usage Page 0xff12 (vendor defined) */ + rdesc[212] == 0x06 && rdesc[213] == 0x12 && rdesc[214] == 0xff && + /* Usage 0x51 */ + rdesc[416] == 0x09 && rdesc[417] == 0x51 && + /* report size 64 */ + rdesc[432] == 0x75 && rdesc[433] == 64 && + /* report count 1 */ + rdesc[434] == 0x95 && rdesc[435] == 1) { + rdesc[433] = 32; + rdesc[435] = 2; + hid_dbg(hdev, "Fixed up first 64-bit field\n"); + } + + if (*rsize == 634 && + /* Usage Page 0xff12 (vendor defined) */ + rdesc[212] == 0x06 && rdesc[213] == 0x12 && rdesc[214] == 0xff && + /* Usage 0x51 */ + rdesc[611] == 0x09 && rdesc[612] == 0x51 && + /* report size 64 */ + rdesc[627] == 0x75 && rdesc[628] == 64 && + /* report count 1 */ + rdesc[629] == 0x95 && rdesc[630] == 1) { + rdesc[628] = 32; + rdesc[630] = 2; + hid_dbg(hdev, "Fixed up second 64-bit field\n"); + } + + return rdesc; +} + +static int appleib_input_configured_fwd(struct appleib_hid_drv_info *drv_info, + struct hid_device *hdev, void *args) +{ + return call_driver_func(drv_info, input_configured, int, hdev, + (struct hid_input *)args); +} + +static int appleib_input_configured(struct hid_device *hdev, + struct hid_input *hidinput) +{ + return appleib_forward_int_op(hdev, appleib_input_configured_fwd, + hidinput); +} + +#ifdef CONFIG_PM +static int appleib_hid_suspend_fwd(struct appleib_hid_drv_info *drv_info, + struct hid_device *hdev, void *args) +{ + return call_driver_func(drv_info, suspend, int, hdev, + *(pm_message_t *)args); +} + +static int appleib_hid_suspend(struct hid_device *hdev, pm_message_t message) +{ + return appleib_forward_int_op(hdev, appleib_hid_suspend_fwd, &message); +} + +static int appleib_hid_resume_fwd(struct appleib_hid_drv_info *drv_info, + struct hid_device *hdev, void *args) +{ + return call_driver_func(drv_info, resume, int, hdev); +} + +static int appleib_hid_resume(struct hid_device *hdev) +{ + return appleib_forward_int_op(hdev, appleib_hid_resume_fwd, NULL); +} + +static int appleib_hid_reset_resume_fwd(struct appleib_hid_drv_info *drv_info, + struct hid_device *hdev, void *args) +{ + return call_driver_func(drv_info, reset_resume, int, hdev); +} + +static int appleib_hid_reset_resume(struct hid_device *hdev) +{ + return appleib_forward_int_op(hdev, appleib_hid_reset_resume_fwd, NULL); +} +#endif /* CONFIG_PM */ + +/** + * Find the field in the report with the given usage. + * @report: the report to search + * @field_usage: the usage of the field to search for + */ +struct hid_field *appleib_find_report_field(struct hid_report *report, + unsigned int field_usage) +{ + int f, u; + + for (f = 0; f < report->maxfield; f++) { + struct hid_field *field = report->field[f]; + + if (field->logical == field_usage) + return field; + + for (u = 0; u < field->maxusage; u++) { + if (field->usage[u].hid == field_usage) + return field; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(appleib_find_report_field); + +/** + * Search all the reports of the device for the field with the given usage. + * @hdev: the device whose reports to search + * @application: the usage of application collection that the field must + * belong to + * @field_usage: the usage of the field to search for + */ +struct hid_field *appleib_find_hid_field(struct hid_device *hdev, + unsigned int application, + unsigned int field_usage) +{ + static const int report_types[] = { HID_INPUT_REPORT, HID_OUTPUT_REPORT, + HID_FEATURE_REPORT }; + struct hid_report *report; + struct hid_field *field; + int t; + + for (t = 0; t < ARRAY_SIZE(report_types); t++) { + struct list_head *report_list = + &hdev->report_enum[report_types[t]].report_list; + list_for_each_entry(report, report_list, list) { + if (report->application != application) + continue; + + field = appleib_find_report_field(report, field_usage); + if (field) + return field; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(appleib_find_hid_field); + +/** + * Return whether we're currently inside a hid_device_probe or not. + * @ib_dev: the appleib_device + */ +bool appleib_in_hid_probe(struct appleib_device *ib_dev) +{ + return ib_dev->in_hid_probe; +} +EXPORT_SYMBOL_GPL(appleib_in_hid_probe); + +static struct appleib_hid_dev_info * +appleib_add_device(struct appleib_device *ib_dev, struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct appleib_hid_dev_info *dev_info; + struct appleib_hid_drv_info *drv_info; + + /* allocate device-info for this device */ + dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); + if (!dev_info) + return NULL; + + INIT_LIST_HEAD(&dev_info->drivers); + dev_info->device = hdev; + dev_info->device_id = id; + + /* notify all our sub drivers */ + mutex_lock(&ib_dev->update_lock); + + ib_dev->in_hid_probe = true; + + list_for_each_entry(drv_info, &ib_dev->hid_drivers, entry) { + appleib_probe_driver(drv_info, dev_info); + } + + ib_dev->in_hid_probe = false; + + /* remember this new device */ + list_add_tail_rcu(&dev_info->entry, &ib_dev->hid_devices); + + mutex_unlock(&ib_dev->update_lock); + + return dev_info; +} + +static void appleib_remove_device(struct appleib_device *ib_dev, + struct appleib_hid_dev_info *dev_info) +{ + list_del_rcu(&dev_info->entry); + synchronize_srcu(&ib_dev->lists_srcu); + + appleib_detach_drivers(ib_dev, dev_info); + + kfree(dev_info); +} + +static int appleib_hid_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct appleib_device *ib_dev; + struct appleib_hid_dev_info *dev_info; + struct usb_device *udev; + int rc; + + /* check usb config first */ + udev = hid_to_usb_dev(hdev); + + if (udev->actconfig->desc.bConfigurationValue != APPLETB_BASIC_CONFIG) { + rc = usb_driver_set_configuration(udev, APPLETB_BASIC_CONFIG); + return rc ? rc : -ENODEV; + } + + /* Assign the driver data */ + ib_dev = appleib_dev; + hid_set_drvdata(hdev, ib_dev); + + /* initialize the report info */ + rc = hid_parse(hdev); + if (rc) { + hid_err(hdev, "ib: hid parse failed (%d)\n", rc); + goto error; + } + + /* alloc bufs etc so probe's can send requests; but connect later */ + rc = hid_hw_start(hdev, 0); + if (rc) { + hid_err(hdev, "ib: hw start failed (%d)\n", rc); + goto error; + } + + /* add this hdev to our device list */ + dev_info = appleib_add_device(ib_dev, hdev, id); + if (!dev_info) { + rc = -ENOMEM; + goto stop_hw; + } + + /* start the hid */ + rc = appleib_start_hid_events(dev_info); + if (rc) + goto remove_dev; + + return 0; + +remove_dev: + mutex_lock(&ib_dev->update_lock); + appleib_remove_device(ib_dev, dev_info); + mutex_unlock(&ib_dev->update_lock); +stop_hw: + hid_hw_stop(hdev); +error: + return rc; +} + +static void appleib_hid_remove(struct hid_device *hdev) +{ + struct appleib_device *ib_dev = hid_get_drvdata(hdev); + struct appleib_hid_dev_info *dev_info; + + mutex_lock(&ib_dev->update_lock); + + list_for_each_entry(dev_info, &ib_dev->hid_devices, entry) { + if (dev_info->device == hdev) { + appleib_stop_hid_events(dev_info); + appleib_remove_device(ib_dev, dev_info); + break; + } + } + + mutex_unlock(&ib_dev->update_lock); + + hid_hw_stop(hdev); +} + +static const struct hid_device_id appleib_hid_devices[] = { + { HID_USB_DEVICE(USB_ID_VENDOR_APPLE, USB_ID_PRODUCT_IBRIDGE) }, + { }, +}; + +static struct hid_driver appleib_hid_driver = { + .name = "apple-ibridge-hid", + .id_table = appleib_hid_devices, + .probe = appleib_hid_probe, + .remove = appleib_hid_remove, + .event = appleib_hid_event, + .report_fixup = appleib_report_fixup, + .input_configured = appleib_input_configured, +#ifdef CONFIG_PM + .suspend = appleib_hid_suspend, + .resume = appleib_hid_resume, + .reset_resume = appleib_hid_reset_resume, +#endif +}; + +static struct appleib_device *appleib_alloc_device(struct acpi_device *acpi_dev) +{ + struct appleib_device *ib_dev; + acpi_status sts; + int rc; + + /* allocate */ + ib_dev = kzalloc(sizeof(*ib_dev), GFP_KERNEL); + if (!ib_dev) + return ERR_PTR(-ENOMEM); + + /* init structures */ + INIT_LIST_HEAD(&ib_dev->hid_drivers); + INIT_LIST_HEAD(&ib_dev->hid_devices); + mutex_init(&ib_dev->update_lock); + init_srcu_struct(&ib_dev->lists_srcu); + + ib_dev->acpi_dev = acpi_dev; + + /* get iBridge acpi power control method */ + sts = acpi_get_handle(acpi_dev->handle, "SOCW", &ib_dev->asoc_socw); + if (ACPI_FAILURE(sts)) { + dev_err(LOG_DEV(ib_dev), + "Error getting handle for ASOC.SOCW method: %s\n", + acpi_format_exception(sts)); + rc = -ENXIO; + goto free_mem; + } + + /* ensure iBridge is powered on */ + sts = acpi_execute_simple_method(ib_dev->asoc_socw, NULL, 1); + if (ACPI_FAILURE(sts)) + dev_warn(LOG_DEV(ib_dev), "SOCW(1) failed: %s\n", + acpi_format_exception(sts)); + + return ib_dev; + +free_mem: + kfree(ib_dev); + return ERR_PTR(rc); +} + +static int appleib_probe(struct acpi_device *acpi) +{ + struct appleib_device *ib_dev; + struct appleib_platform_data *pdata; + int i; + int ret; + + if (appleib_dev) + return -EBUSY; + + ib_dev = appleib_alloc_device(acpi); + if (IS_ERR_OR_NULL(ib_dev)) + return PTR_ERR(ib_dev); + + ib_dev->subdevs = kmemdup(appleib_subdevs, sizeof(appleib_subdevs), + GFP_KERNEL); + if (!ib_dev->subdevs) { + ret = -ENOMEM; + goto free_dev; + } + + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + ret = -ENOMEM; + goto free_subdevs; + } + + pdata->ib_dev = ib_dev; + pdata->log_dev = LOG_DEV(ib_dev); + for (i = 0; i < ARRAY_SIZE(appleib_subdevs); i++) { + ib_dev->subdevs[i].platform_data = pdata; + ib_dev->subdevs[i].pdata_size = sizeof(*pdata); + } + + ret = mfd_add_devices(&acpi->dev, PLATFORM_DEVID_NONE, + ib_dev->subdevs, ARRAY_SIZE(appleib_subdevs), + NULL, 0, NULL); + if (ret) { + dev_err(LOG_DEV(ib_dev), "Error adding MFD devices: %d\n", ret); + goto free_pdata; + } + + acpi->driver_data = ib_dev; + appleib_dev = ib_dev; + + ret = hid_register_driver(&appleib_hid_driver); + if (ret) { + dev_err(LOG_DEV(ib_dev), "Error registering hid driver: %d\n", + ret); + goto rem_mfd_devs; + } + + return 0; + +rem_mfd_devs: + mfd_remove_devices(&acpi->dev); +free_pdata: + kfree(pdata); +free_subdevs: + kfree(ib_dev->subdevs); +free_dev: + appleib_dev = NULL; + acpi->driver_data = NULL; + kfree(ib_dev); + return ret; +} + +static int appleib_remove(struct acpi_device *acpi) +{ + struct appleib_device *ib_dev = acpi_driver_data(acpi); + + mfd_remove_devices(&acpi->dev); + hid_unregister_driver(&appleib_hid_driver); + + if (appleib_dev == ib_dev) + appleib_dev = NULL; + + kfree(ib_dev->subdevs[0].platform_data); + kfree(ib_dev->subdevs); + kfree(ib_dev); + + return 0; +} + +static int appleib_suspend(struct device *dev) +{ + struct acpi_device *adev; + struct appleib_device *ib_dev; + int rc; + + adev = to_acpi_device(dev); + ib_dev = acpi_driver_data(adev); + + rc = acpi_execute_simple_method(ib_dev->asoc_socw, NULL, 0); + if (ACPI_FAILURE(rc)) + dev_warn(LOG_DEV(ib_dev), "SOCW(0) failed: %s\n", + acpi_format_exception(rc)); + + return 0; +} + +static int appleib_resume(struct device *dev) +{ + struct acpi_device *adev; + struct appleib_device *ib_dev; + int rc; + + adev = to_acpi_device(dev); + ib_dev = acpi_driver_data(adev); + + rc = acpi_execute_simple_method(ib_dev->asoc_socw, NULL, 1); + if (ACPI_FAILURE(rc)) + dev_warn(LOG_DEV(ib_dev), "SOCW(1) failed: %s\n", + acpi_format_exception(rc)); + + return 0; +} + +static const struct dev_pm_ops appleib_pm = { + .suspend = appleib_suspend, + .resume = appleib_resume, + .restore = appleib_resume, +}; + +static const struct acpi_device_id appleib_acpi_match[] = { + { "APP7777", 0 }, + { }, +}; + +MODULE_DEVICE_TABLE(acpi, appleib_acpi_match); + +static struct acpi_driver appleib_driver = { + .name = "apple-ibridge", + .class = "topcase", /* ? */ + .owner = THIS_MODULE, + .ids = appleib_acpi_match, + .ops = { + .add = appleib_probe, + .remove = appleib_remove, + }, + .drv = { + .pm = &appleib_pm, + }, +}; + +module_acpi_driver(appleib_driver) + +MODULE_AUTHOR("Ronald Tschalär"); +MODULE_DESCRIPTION("Apple iBridge driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/apple-ibridge.h b/include/linux/mfd/apple-ibridge.h new file mode 100644 index 000000000000..d321714767f7 --- /dev/null +++ b/include/linux/mfd/apple-ibridge.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Apple iBridge Driver + * + * Copyright (c) 2018 Ronald Tschalär + */ + +#ifndef __LINUX_MFD_APPLE_IBRDIGE_H +#define __LINUX_MFD_APPLE_IBRDIGE_H + +#include +#include + +#define PLAT_NAME_IB_TB "apple-ib-tb" +#define PLAT_NAME_IB_ALS "apple-ib-als" + +struct appleib_device; + +struct appleib_platform_data { + struct appleib_device *ib_dev; + struct device *log_dev; +}; + +int appleib_register_hid_driver(struct appleib_device *ib_dev, + struct hid_driver *driver, void *data); +int appleib_unregister_hid_driver(struct appleib_device *ib_dev, + struct hid_driver *driver); + +void *appleib_get_drvdata(struct appleib_device *ib_dev, + struct hid_driver *driver); +bool appleib_in_hid_probe(struct appleib_device *ib_dev); + +struct hid_field *appleib_find_report_field(struct hid_report *report, + unsigned int field_usage); +struct hid_field *appleib_find_hid_field(struct hid_device *hdev, + unsigned int application, + unsigned int field_usage); + +#endif From patchwork Mon Apr 22 03:12:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Life is hard, and then you die" X-Patchwork-Id: 10910625 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C960117E0 for ; Mon, 22 Apr 2019 03:20:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B7B992858F for ; Mon, 22 Apr 2019 03:20:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AB3DB28649; Mon, 22 Apr 2019 03:20:15 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 319812858F for ; Mon, 22 Apr 2019 03:20:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726195AbfDVDUD (ORCPT ); Sun, 21 Apr 2019 23:20:03 -0400 Received: from chill.innovation.ch ([216.218.245.220]:49774 "EHLO chill.innovation.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726407AbfDVDUD (ORCPT ); Sun, 21 Apr 2019 23:20:03 -0400 Received: from localhost (localhost [127.0.0.1]) by chill.innovation.ch (Postfix) with ESMTP id A4FBD640152; Sun, 21 Apr 2019 20:13:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at Received: from chill.innovation.ch ([127.0.0.1]) by localhost (chill.innovation.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id lr5raiN3SWel; Sun, 21 Apr 2019 20:12:57 -0700 (PDT) From: =?utf-8?q?Ronald_Tschal=C3=A4r?= DKIM-Filter: OpenDKIM Filter v2.10.3 chill.innovation.ch 51B21640142 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=innovation.ch; s=default; t=1555902777; bh=V+zha+/dbm7EmZVThrSt39R2S58cVcgwnjm6Mo1I4yk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IcyLK4iR8+pHtpGnOs3Div9kHSprnuW0chCwTI5F/wL5hn1lRu1jndshyhAVSCsu5 NhDj0OMlWEUY2XOqwbfvIM+HxMdg6V8C/VSLUk2GEF2Fud7P2yl8WTbOvldaEalVYc pdSKUvBH+BpGBLuJ5FQM9H6+PYyE0iMwQb7pA5i1wGQPSGEv8Utq3HVKT6kKUA+iAT 7AzpNbMHEc9FXnnL1fINg0E9oVno+VoM2BukvAY+/TNCv4XevqT5bB5VzdwsEkmo1T Fi3PCGg0HYwYPecnAEEi5JN2LzJDegvM9OSjm2XWoo2MwMSFKuZMBzBm4XHkyIdiyq dT4NnT77j70TQ== To: Jiri Kosina , Benjamin Tissoires , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Lee Jones Cc: linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] HID: apple-ib-tb: Add driver for the Touch Bar on MacBook Pro's. Date: Sun, 21 Apr 2019 20:12:50 -0700 Message-Id: <20190422031251.11968-3-ronald@innovation.ch> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190422031251.11968-1-ronald@innovation.ch> References: <20190422031251.11968-1-ronald@innovation.ch> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This driver enables basic touch bar functionality: enabling it, switching between modes on FN key press, and dimming and turning the display off/on when idle/active. Signed-off-by: Ronald Tschalär --- drivers/hid/Kconfig | 10 + drivers/hid/Makefile | 1 + drivers/hid/apple-ib-tb.c | 1288 +++++++++++++++++++++++++++++++++++++ 3 files changed, 1299 insertions(+) create mode 100644 drivers/hid/apple-ib-tb.c diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 41e9935fc584..f0a65bb4be6e 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -135,6 +135,16 @@ config HID_APPLE Say Y here if you want support for keyboards of Apple iBooks, PowerBooks, MacBooks, MacBook Pros and Apple Aluminum. +config HID_APPLE_IBRIDGE_TB + tristate "Apple iBridge Touch Bar" + depends on MFD_APPLE_IBRIDGE + ---help--- + Say Y here if you want support for the Touch Bar on recent + MacBook Pros. + + To compile this driver as a module, choose M here: the + module will be called apple-ib-tb. + config HID_APPLEIR tristate "Apple infrared receiver" depends on (USB_HID) diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 896a51ce7ce0..dedd8049d3fb 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_HID_ACCUTOUCH) += hid-accutouch.o obj-$(CONFIG_HID_ALPS) += hid-alps.o obj-$(CONFIG_HID_ACRUX) += hid-axff.o obj-$(CONFIG_HID_APPLE) += hid-apple.o +obj-$(CONFIG_HID_APPLE_IBRIDGE_TB) += apple-ib-tb.o obj-$(CONFIG_HID_APPLEIR) += hid-appleir.o obj-$(CONFIG_HID_ASUS) += hid-asus.o obj-$(CONFIG_HID_AUREAL) += hid-aureal.o diff --git a/drivers/hid/apple-ib-tb.c b/drivers/hid/apple-ib-tb.c new file mode 100644 index 000000000000..6b72ff56b17f --- /dev/null +++ b/drivers/hid/apple-ib-tb.c @@ -0,0 +1,1288 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Apple Touch Bar Driver + * + * Copyright (c) 2017-2018 Ronald Tschalär + */ + +/* + * Recent MacBookPro models (13,[23] and 14,[23]) have a touch bar, which + * is exposed via several USB interfaces. MacOS supports a fancy mode + * where arbitrary buttons can be defined; this driver currently only + * supports the simple mode that consists of 3 predefined layouts + * (escape-only, esc + special keys, and esc + function keys). + * + * The first USB HID interface supports two reports, an input report that + * is used to report the key presses, and an output report which can be + * used to set the touch bar "mode": touch bar off (in which case no touches + * are reported at all), escape key only, escape + 12 function keys, and + * escape + several special keys (including brightness, audio volume, + * etc). The second interface supports several, complex reports, most of + * which are unknown at this time, but one of which has been determined to + * allow for controlling of the touch bar's brightness: off (though touches + * are still reported), dimmed, and full brightness. This driver makes + * use of these two reports. + */ + +#define dev_fmt(fmt) "tb: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define HID_UP_APPLE 0xff120000 +#define HID_USAGE_MODE (HID_UP_CUSTOM | 0x0004) +#define HID_USAGE_APPLE_APP (HID_UP_APPLE | 0x0001) +#define HID_USAGE_DISP (HID_UP_APPLE | 0x0021) + +#define APPLETB_MAX_TB_KEYS 13 /* ESC, F1-F12 */ + +#define APPLETB_CMD_MODE_ESC 0 +#define APPLETB_CMD_MODE_FN 1 +#define APPLETB_CMD_MODE_SPCL 2 +#define APPLETB_CMD_MODE_OFF 3 +#define APPLETB_CMD_MODE_NONE 255 + +#define APPLETB_CMD_DISP_ON 1 +#define APPLETB_CMD_DISP_DIM 2 +#define APPLETB_CMD_DISP_OFF 4 +#define APPLETB_CMD_DISP_NONE 255 + +#define APPLETB_FN_MODE_FKEYS 0 +#define APPLETB_FN_MODE_NORM 1 +#define APPLETB_FN_MODE_INV 2 +#define APPLETB_FN_MODE_SPCL 3 +#define APPLETB_FN_MODE_MAX APPLETB_FN_MODE_SPCL + +#define APPLETB_DEVID_KEYBOARD 1 +#define APPLETB_DEVID_TOUCHPAD 2 + +#define APPLETB_MAX_DIM_TIME 30 + +static int appletb_tb_def_idle_timeout = 5 * 60; +module_param_named(idle_timeout, appletb_tb_def_idle_timeout, int, 0444); +MODULE_PARM_DESC(idle_timeout, "Default touch bar idle timeout (in seconds); 0 disables touch bar, -1 disables timeout"); + +static int appletb_tb_def_dim_timeout = -2; +module_param_named(dim_timeout, appletb_tb_def_dim_timeout, int, 0444); +MODULE_PARM_DESC(dim_timeout, "Default touch bar dim timeout (in seconds); 0 means always dimmmed, -1 disables dimming, [-2] calculates timeout based on idle-timeout"); + +static int appletb_tb_def_fn_mode = APPLETB_FN_MODE_NORM; +module_param_named(fnmode, appletb_tb_def_fn_mode, int, 0444); +MODULE_PARM_DESC(fnmode, "Default Fn key mode: 0 = f-keys only, [1] = fn key switches from special to f-keys, 2 = inverse of 1, 3 = special keys only"); + +static ssize_t idle_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t idle_timeout_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size); +static DEVICE_ATTR_RW(idle_timeout); + +static ssize_t dim_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t dim_timeout_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size); +static DEVICE_ATTR_RW(dim_timeout); + +static ssize_t fnmode_show(struct device *dev, struct device_attribute *attr, + char *buf); +static ssize_t fnmode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size); +static DEVICE_ATTR_RW(fnmode); + +static struct attribute *appletb_attrs[] = { + &dev_attr_idle_timeout.attr, + &dev_attr_dim_timeout.attr, + &dev_attr_fnmode.attr, + NULL, +}; + +static const struct attribute_group appletb_attr_group = { + .attrs = appletb_attrs, +}; + +struct appletb_device { + bool active; + struct device *log_dev; + + struct appletb_report_info { + struct hid_device *hdev; + struct usb_interface *usb_iface; + unsigned int usb_epnum; + unsigned int report_id; + unsigned int report_type; + bool suspended; + } mode_info, disp_info; + + struct input_handler inp_handler; + struct input_handle kbd_handle; + struct input_handle tpd_handle; + + bool last_tb_keys_pressed[APPLETB_MAX_TB_KEYS]; + bool last_tb_keys_translated[APPLETB_MAX_TB_KEYS]; + bool last_fn_pressed; + + ktime_t last_event_time; + + unsigned char cur_tb_mode; + unsigned char pnd_tb_mode; + unsigned char cur_tb_disp; + unsigned char pnd_tb_disp; + bool tb_autopm_off; + bool restore_autopm; + struct delayed_work tb_work; + /* protects most of the above */ + spinlock_t tb_lock; + + int dim_timeout; + int idle_timeout; + bool dim_to_is_calc; + int fn_mode; +}; + +struct appletb_key_translation { + u16 from; + u16 to; +}; + +static const struct appletb_key_translation appletb_fn_codes[] = { + { KEY_F1, KEY_BRIGHTNESSDOWN }, + { KEY_F2, KEY_BRIGHTNESSUP }, + { KEY_F3, KEY_SCALE }, /* not used */ + { KEY_F4, KEY_DASHBOARD }, /* not used */ + { KEY_F5, KEY_KBDILLUMDOWN }, + { KEY_F6, KEY_KBDILLUMUP }, + { KEY_F7, KEY_PREVIOUSSONG }, + { KEY_F8, KEY_PLAYPAUSE }, + { KEY_F9, KEY_NEXTSONG }, + { KEY_F10, KEY_MUTE }, + { KEY_F11, KEY_VOLUMEDOWN }, + { KEY_F12, KEY_VOLUMEUP }, +}; + +static struct hid_driver appletb_hid_driver; + +static int appletb_send_hid_report(struct appletb_report_info *rinfo, + __u8 requesttype, void *data, __u16 size) +{ + void *buffer; + struct usb_device *dev = interface_to_usbdev(rinfo->usb_iface); + u8 ifnum = rinfo->usb_iface->cur_altsetting->desc.bInterfaceNumber; + int tries = 0; + int rc; + + buffer = kmemdup(data, size, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + do { + rc = usb_control_msg(dev, + usb_sndctrlpipe(dev, rinfo->usb_epnum), + HID_REQ_SET_REPORT, requesttype, + rinfo->report_type << 8 | rinfo->report_id, + ifnum, buffer, size, 2000); + if (rc != -EPIPE) + break; + + usleep_range(1000 << tries, 3000 << tries); + } while (++tries < 5); + + kfree(buffer); + + return (rc > 0) ? 0 : rc; +} + +static bool appletb_disable_autopm(struct appletb_report_info *rinfo) +{ + int rc; + + rc = usb_autopm_get_interface(rinfo->usb_iface); + if (rc == 0) + return true; + + hid_err(rinfo->hdev, + "Failed to disable auto-pm on touch bar device (%d)\n", rc); + return false; +} + +static int appletb_set_tb_mode(struct appletb_device *tb_dev, + unsigned char mode) +{ + int rc; + bool autopm_off = false; + + if (!tb_dev->mode_info.usb_iface) + return -ENOTCONN; + + autopm_off = appletb_disable_autopm(&tb_dev->mode_info); + + rc = appletb_send_hid_report(&tb_dev->mode_info, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_DEVICE, + &mode, 1); + if (rc < 0) + dev_err(tb_dev->log_dev, + "Failed to set touch bar mode to %u (%d)\n", mode, rc); + + if (autopm_off) + usb_autopm_put_interface(tb_dev->mode_info.usb_iface); + + return rc; +} + +static int appletb_set_tb_disp(struct appletb_device *tb_dev, + unsigned char disp) +{ + unsigned char report[] = { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; + int rc; + + if (!tb_dev->disp_info.usb_iface) + return -ENOTCONN; + + /* + * Keep the USB interface powered on while the touch bar display is on + * for better responsiveness. + */ + if (disp != APPLETB_CMD_DISP_OFF && + tb_dev->cur_tb_disp == APPLETB_CMD_DISP_OFF) + tb_dev->tb_autopm_off = + appletb_disable_autopm(&tb_dev->disp_info); + + report[0] = tb_dev->disp_info.report_id; + report[2] = disp; + + rc = appletb_send_hid_report(&tb_dev->disp_info, + USB_DIR_OUT | USB_TYPE_CLASS | + USB_RECIP_INTERFACE, + report, sizeof(report)); + if (rc < 0) + dev_err(tb_dev->log_dev, + "Failed to set touch bar display to %u (%d)\n", disp, + rc); + + if (disp == APPLETB_CMD_DISP_OFF && + tb_dev->cur_tb_disp != APPLETB_CMD_DISP_OFF) { + if (tb_dev->tb_autopm_off) { + usb_autopm_put_interface(tb_dev->disp_info.usb_iface); + tb_dev->tb_autopm_off = false; + } + } + + return rc; +} + +static bool appletb_any_tb_key_pressed(struct appletb_device *tb_dev) +{ + int idx; + + for (idx = 0; idx < ARRAY_SIZE(tb_dev->last_tb_keys_pressed); idx++) { + if (tb_dev->last_tb_keys_pressed[idx]) + return true; + } + + return false; +} + +static void appletb_schedule_tb_update(struct appletb_device *tb_dev, s64 secs) +{ + schedule_delayed_work(&tb_dev->tb_work, msecs_to_jiffies(secs * 1000)); +} + +static void appletb_set_tb_worker(struct work_struct *work) +{ + struct appletb_device *tb_dev = + container_of(work, struct appletb_device, tb_work.work); + s64 time_left, min_timeout, time_to_off; + unsigned char pending_mode; + unsigned char pending_disp; + unsigned char current_disp; + bool restore_autopm; + bool any_tb_key_pressed, need_reschedule; + int rc1 = 1, rc2 = 1; + unsigned long flags; + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + /* handle explicit mode-change request */ + pending_mode = tb_dev->pnd_tb_mode; + pending_disp = tb_dev->pnd_tb_disp; + restore_autopm = tb_dev->restore_autopm; + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + if (pending_mode != APPLETB_CMD_MODE_NONE) + rc1 = appletb_set_tb_mode(tb_dev, pending_mode); + if (pending_mode != APPLETB_CMD_MODE_NONE && + pending_disp != APPLETB_CMD_DISP_NONE) + msleep(25); + if (pending_disp != APPLETB_CMD_DISP_NONE) + rc2 = appletb_set_tb_disp(tb_dev, pending_disp); + + if (restore_autopm && tb_dev->tb_autopm_off) + appletb_disable_autopm(&tb_dev->disp_info); + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + need_reschedule = false; + + if (rc1 == 0) { + tb_dev->cur_tb_mode = pending_mode; + + if (tb_dev->pnd_tb_mode == pending_mode) + tb_dev->pnd_tb_mode = APPLETB_CMD_MODE_NONE; + else + need_reschedule = true; + } + + if (rc2 == 0) { + tb_dev->cur_tb_disp = pending_disp; + + if (tb_dev->pnd_tb_disp == pending_disp) + tb_dev->pnd_tb_disp = APPLETB_CMD_DISP_NONE; + else + need_reschedule = true; + } + current_disp = tb_dev->cur_tb_disp; + + tb_dev->restore_autopm = false; + + /* calculate time left to next timeout */ + if (tb_dev->idle_timeout <= 0 && tb_dev->dim_timeout <= 0) + min_timeout = -1; + else if (tb_dev->dim_timeout <= 0) + min_timeout = tb_dev->idle_timeout; + else if (tb_dev->idle_timeout <= 0) + min_timeout = tb_dev->dim_timeout; + else + min_timeout = min(tb_dev->dim_timeout, tb_dev->idle_timeout); + + if (min_timeout > 0) { + s64 idle_time = + (ktime_ms_delta(ktime_get(), tb_dev->last_event_time) + + 500) / 1000; + + time_left = max(min_timeout - idle_time, 0LL); + if (tb_dev->idle_timeout <= 0) + time_to_off = -1; + else if (idle_time >= tb_dev->idle_timeout) + time_to_off = 0; + else + time_to_off = tb_dev->idle_timeout - idle_time; + } + + any_tb_key_pressed = appletb_any_tb_key_pressed(tb_dev); + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + /* a new command arrived while we were busy - handle it */ + if (need_reschedule) { + appletb_schedule_tb_update(tb_dev, 0); + return; + } + + /* if no idle/dim timeout, we're done */ + if (min_timeout <= 0) + return; + + /* manage idle/dim timeout */ + if (time_left > 0) { + /* we fired too soon or had a mode-change - re-schedule */ + appletb_schedule_tb_update(tb_dev, time_left); + } else if (any_tb_key_pressed) { + /* keys are still pressed - re-schedule */ + appletb_schedule_tb_update(tb_dev, min_timeout); + } else { + /* dim or idle timeout reached */ + int next_disp = (time_to_off == 0) ? APPLETB_CMD_DISP_OFF : + APPLETB_CMD_DISP_DIM; + if (next_disp != current_disp && + appletb_set_tb_disp(tb_dev, next_disp) == 0) { + spin_lock_irqsave(&tb_dev->tb_lock, flags); + tb_dev->cur_tb_disp = next_disp; + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + } + + if (time_to_off > 0) + appletb_schedule_tb_update(tb_dev, time_to_off); + } +} + +static u16 appletb_fn_to_special(u16 code) +{ + int idx; + + for (idx = 0; idx < ARRAY_SIZE(appletb_fn_codes); idx++) { + if (appletb_fn_codes[idx].from == code) + return appletb_fn_codes[idx].to; + } + + return 0; +} + +static unsigned char appletb_get_cur_tb_mode(struct appletb_device *tb_dev) +{ + return tb_dev->pnd_tb_mode != APPLETB_CMD_MODE_NONE ? + tb_dev->pnd_tb_mode : tb_dev->cur_tb_mode; +} + +static unsigned char appletb_get_cur_tb_disp(struct appletb_device *tb_dev) +{ + return tb_dev->pnd_tb_disp != APPLETB_CMD_DISP_NONE ? + tb_dev->pnd_tb_disp : tb_dev->cur_tb_disp; +} + +static unsigned char appletb_get_fn_tb_mode(struct appletb_device *tb_dev) +{ + switch (tb_dev->fn_mode) { + case APPLETB_FN_MODE_FKEYS: + return APPLETB_CMD_MODE_FN; + + case APPLETB_FN_MODE_SPCL: + return APPLETB_CMD_MODE_SPCL; + + case APPLETB_FN_MODE_INV: + return (tb_dev->last_fn_pressed) ? APPLETB_CMD_MODE_SPCL : + APPLETB_CMD_MODE_FN; + + case APPLETB_FN_MODE_NORM: + default: + return (tb_dev->last_fn_pressed) ? APPLETB_CMD_MODE_FN : + APPLETB_CMD_MODE_SPCL; + } +} + +/* + * Switch touch bar mode and display when mode or display not the desired ones. + */ +static void appletb_update_touchbar_no_lock(struct appletb_device *tb_dev, + bool force) +{ + unsigned char want_mode; + unsigned char want_disp; + bool need_update = false; + + /* + * Calculate the new modes: + * idle_timeout: + * -1 always on + * 0 always off + * >0 turn off after idle_timeout seconds + * dim_timeout (only valid if idle_timeout != 0): + * -1 never dimmed + * 0 always dimmed + * >0 dim off after dim_timeout seconds + */ + if (tb_dev->idle_timeout == 0) { + want_mode = APPLETB_CMD_MODE_OFF; + want_disp = APPLETB_CMD_DISP_OFF; + } else { + want_mode = appletb_get_fn_tb_mode(tb_dev); + want_disp = tb_dev->dim_timeout == 0 ? APPLETB_CMD_DISP_DIM : + APPLETB_CMD_DISP_ON; + } + + /* + * See if we need to update the touch bar, taking into account that we + * generally don't want to switch modes while a touch bar key is + * pressed. + */ + if (appletb_get_cur_tb_mode(tb_dev) != want_mode && + !appletb_any_tb_key_pressed(tb_dev)) { + tb_dev->pnd_tb_mode = want_mode; + need_update = true; + } + + if (appletb_get_cur_tb_disp(tb_dev) != want_disp && + (!appletb_any_tb_key_pressed(tb_dev) || + (appletb_any_tb_key_pressed(tb_dev) && + want_disp != APPLETB_CMD_DISP_OFF))) { + tb_dev->pnd_tb_disp = want_disp; + need_update = true; + } + + if (force) + need_update = true; + + /* schedule the update if desired */ + dev_dbg_ratelimited(tb_dev->log_dev, + "update: need_update=%d, want_mode=%d, cur-mode=%d, want_disp=%d, cur-disp=%d\n", + need_update, want_mode, tb_dev->cur_tb_mode, + want_disp, tb_dev->cur_tb_disp); + if (need_update) { + cancel_delayed_work(&tb_dev->tb_work); + appletb_schedule_tb_update(tb_dev, 0); + } +} + +static void appletb_update_touchbar(struct appletb_device *tb_dev, bool force) +{ + unsigned long flags; + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + if (tb_dev->active) + appletb_update_touchbar_no_lock(tb_dev, force); + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); +} + +static void appletb_set_idle_timeout(struct appletb_device *tb_dev, int new) +{ + tb_dev->idle_timeout = new; + if (tb_dev->dim_to_is_calc) + tb_dev->dim_timeout = new - min(APPLETB_MAX_DIM_TIME, new / 3); +} + +static ssize_t idle_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + + return snprintf(buf, PAGE_SIZE, "%d\n", tb_dev->idle_timeout); +} + +static ssize_t idle_timeout_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + long new; + int rc; + + rc = kstrtol(buf, 0, &new); + if (rc || new > INT_MAX || new < -1) + return -EINVAL; + + appletb_set_idle_timeout(tb_dev, new); + appletb_update_touchbar(tb_dev, true); + + return size; +} + +static void appletb_set_dim_timeout(struct appletb_device *tb_dev, int new) +{ + if (new == -2) { + tb_dev->dim_to_is_calc = true; + appletb_set_idle_timeout(tb_dev, tb_dev->idle_timeout); + } else { + tb_dev->dim_to_is_calc = false; + tb_dev->dim_timeout = new; + } +} + +static ssize_t dim_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + + return snprintf(buf, PAGE_SIZE, "%d\n", + tb_dev->dim_to_is_calc ? -2 : tb_dev->dim_timeout); +} + +static ssize_t dim_timeout_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + long new; + int rc; + + rc = kstrtol(buf, 0, &new); + if (rc || new > INT_MAX || new < -2) + return -EINVAL; + + appletb_set_dim_timeout(tb_dev, new); + appletb_update_touchbar(tb_dev, true); + + return size; +} + +static ssize_t fnmode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + + return snprintf(buf, PAGE_SIZE, "%d\n", tb_dev->fn_mode); +} + +static ssize_t fnmode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver); + long new; + int rc; + + rc = kstrtol(buf, 0, &new); + if (rc || new > APPLETB_FN_MODE_MAX || new < 0) + return -EINVAL; + + tb_dev->fn_mode = new; + appletb_update_touchbar(tb_dev, false); + + return size; +} + +static int appletb_tb_key_to_slot(unsigned int code) +{ + switch (code) { + case KEY_ESC: + return 0; + case KEY_F1: + case KEY_F2: + case KEY_F3: + case KEY_F4: + case KEY_F5: + case KEY_F6: + case KEY_F7: + case KEY_F8: + case KEY_F9: + case KEY_F10: + return code - KEY_F1 + 1; + case KEY_F11: + case KEY_F12: + return code - KEY_F11 + 11; + default: + return -1; + } +} + +static int appletb_hid_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver); + unsigned int new_code = 0; + unsigned long flags; + bool send_dummy = false; + bool send_trnsl = false; + int slot; + int rc = 0; + + /* Only interested in keyboard events */ + if ((usage->hid & HID_USAGE_PAGE) != HID_UP_KEYBOARD || + usage->type != EV_KEY) + return 0; + + /* + * Skip non-touch-bar keys. + * + * Either the touch bar itself or usbhid generate a slew of key-down + * events for all the meta keys. None of which we're at all interested + * in. + */ + slot = appletb_tb_key_to_slot(usage->code); + if (slot < 0) + return 0; + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + if (!tb_dev->active) { + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + return 0; + } + + new_code = appletb_fn_to_special(usage->code); + + /* remember which (untranslated) touch bar keys are pressed */ + if (value != 2) + tb_dev->last_tb_keys_pressed[slot] = value; + + /* remember last time keyboard or touchpad was touched */ + tb_dev->last_event_time = ktime_get(); + + /* only switch touch bar mode when no touch bar keys are pressed */ + appletb_update_touchbar_no_lock(tb_dev, false); + + /* + * We want to suppress touch bar keys while the touch bar is off, but + * we do want to wake up the screen if it's asleep, so generate a dummy + * event. + */ + if (tb_dev->cur_tb_mode == APPLETB_CMD_MODE_OFF || + tb_dev->cur_tb_disp == APPLETB_CMD_DISP_OFF) { + send_dummy = true; + rc = 1; + /* translate special keys */ + } else if (new_code && + ((value > 0 && + appletb_get_cur_tb_mode(tb_dev) == APPLETB_CMD_MODE_SPCL) + || + (value == 0 && tb_dev->last_tb_keys_translated[slot]))) { + tb_dev->last_tb_keys_translated[slot] = true; + send_trnsl = true; + rc = 1; + /* everything else handled normally */ + } else { + tb_dev->last_tb_keys_translated[slot] = false; + } + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + /* + * Need to send these input events outside of the lock, as otherwise + * we can run into the following deadlock: + * Task 1 Task 2 + * appletb_hid_event() input_event() + * acquire tb_lock acquire dev->event_lock + * input_event() appletb_inp_event() + * acquire dev->event_lock acquire tb_lock + */ + if (send_dummy) { + input_event(field->hidinput->input, EV_KEY, KEY_UNKNOWN, 1); + input_event(field->hidinput->input, EV_KEY, KEY_UNKNOWN, 0); + } else if (send_trnsl) { + input_event(field->hidinput->input, usage->type, new_code, + value); + } + + return rc; +} + +static void appletb_inp_event(struct input_handle *handle, unsigned int type, + unsigned int code, int value) +{ + struct appletb_device *tb_dev = handle->private; + unsigned long flags; + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + if (!tb_dev->active) { + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + return; + } + + /* remember last state of FN key */ + if (type == EV_KEY && code == KEY_FN && value != 2) + tb_dev->last_fn_pressed = value; + + /* remember last time keyboard or touchpad was touched */ + tb_dev->last_event_time = ktime_get(); + + /* only switch touch bar mode when no touch bar keys are pressed */ + appletb_update_touchbar_no_lock(tb_dev, false); + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); +} + +/* Find and save the usb-device associated with the touch bar input device */ +static struct usb_interface *appletb_get_usb_iface(struct hid_device *hdev) +{ + struct device *dev = &hdev->dev; + + /* find the usb-interface device */ + if (!dev->bus || strcmp(dev->bus->name, "hid") != 0) + return NULL; + + dev = dev->parent; + if (!dev || !dev->bus || strcmp(dev->bus->name, "usb") != 0) + return NULL; + + return to_usb_interface(dev); +} + +static int appletb_inp_connect(struct input_handler *handler, + struct input_dev *dev, + const struct input_device_id *id) +{ + struct appletb_device *tb_dev = handler->private; + struct input_handle *handle; + int rc; + + if (id->driver_info == APPLETB_DEVID_KEYBOARD) { + handle = &tb_dev->kbd_handle; + handle->name = "tbkbd"; + } else if (id->driver_info == APPLETB_DEVID_TOUCHPAD) { + handle = &tb_dev->tpd_handle; + handle->name = "tbtpad"; + } else { + dev_err(tb_dev->log_dev, "Unknown device id (%lu)\n", + id->driver_info); + return -ENOENT; + } + + if (handle->dev) { + dev_err(tb_dev->log_dev, + "Duplicate connect to %s input device\n", handle->name); + return -EEXIST; + } + + handle->open = 0; + handle->dev = input_get_device(dev); + handle->handler = handler; + handle->private = tb_dev; + + rc = input_register_handle(handle); + if (rc) + goto err_free_dev; + + rc = input_open_device(handle); + if (rc) + goto err_unregister_handle; + + dev_dbg(tb_dev->log_dev, "Connected to %s input device\n", + handle == &tb_dev->kbd_handle ? "keyboard" : "touchpad"); + + return 0; + + err_unregister_handle: + input_unregister_handle(handle); + err_free_dev: + input_put_device(handle->dev); + handle->dev = NULL; + return rc; +} + +static void appletb_inp_disconnect(struct input_handle *handle) +{ + struct appletb_device *tb_dev = handle->private; + + input_close_device(handle); + input_unregister_handle(handle); + + dev_dbg(tb_dev->log_dev, "Disconnected from %s input device\n", + handle == &tb_dev->kbd_handle ? "keyboard" : "touchpad"); + + input_put_device(handle->dev); + handle->dev = NULL; +} + +static int appletb_input_configured(struct hid_device *hdev, + struct hid_input *hidinput) +{ + int idx; + struct input_dev *input = hidinput->input; + + /* + * Clear various input capabilities that are blindly set by the hid + * driver (usbkbd.c) + */ + memset(input->evbit, 0, sizeof(input->evbit)); + memset(input->keybit, 0, sizeof(input->keybit)); + memset(input->ledbit, 0, sizeof(input->ledbit)); + + /* set our actual capabilities */ + __set_bit(EV_KEY, input->evbit); + __set_bit(EV_REP, input->evbit); + __set_bit(EV_MSC, input->evbit); /* hid-input generates MSC_SCAN */ + + for (idx = 0; idx < ARRAY_SIZE(appletb_fn_codes); idx++) { + input_set_capability(input, EV_KEY, appletb_fn_codes[idx].from); + input_set_capability(input, EV_KEY, appletb_fn_codes[idx].to); + } + + input_set_capability(input, EV_KEY, KEY_ESC); + input_set_capability(input, EV_KEY, KEY_UNKNOWN); + + return 0; +} + +static int appletb_fill_report_info(struct appletb_device *tb_dev, + struct hid_device *hdev) +{ + struct appletb_report_info *report_info = NULL; + struct usb_interface *usb_iface; + struct hid_field *field; + + field = appleib_find_hid_field(hdev, HID_GD_KEYBOARD, HID_USAGE_MODE); + if (field) { + report_info = &tb_dev->mode_info; + } else { + field = appleib_find_hid_field(hdev, HID_USAGE_APPLE_APP, + HID_USAGE_DISP); + if (field) + report_info = &tb_dev->disp_info; + } + + if (!report_info) + return 0; + + usb_iface = appletb_get_usb_iface(hdev); + if (!usb_iface) { + dev_err(tb_dev->log_dev, + "Failed to find usb interface for hid device %s\n", + dev_name(&hdev->dev)); + return -ENODEV; + } + + report_info->hdev = hdev; + + report_info->usb_iface = usb_get_intf(usb_iface); + report_info->usb_epnum = 0; + + report_info->report_id = field->report->id; + switch (field->report->type) { + case HID_INPUT_REPORT: + report_info->report_type = 0x01; break; + case HID_OUTPUT_REPORT: + report_info->report_type = 0x02; break; + case HID_FEATURE_REPORT: + report_info->report_type = 0x03; break; + } + + return 1; +} + +static struct appletb_report_info * +appletb_get_report_info(struct appletb_device *tb_dev, struct hid_device *hdev) +{ + if (hdev == tb_dev->mode_info.hdev) + return &tb_dev->mode_info; + if (hdev == tb_dev->disp_info.hdev) + return &tb_dev->disp_info; + return NULL; +} + +static void appletb_mark_active(struct appletb_device *tb_dev, bool active) +{ + unsigned long flags; + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + tb_dev->active = active; + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); +} + +static const struct input_device_id appletb_input_devices[] = { + { + .flags = INPUT_DEVICE_ID_MATCH_BUS | + INPUT_DEVICE_ID_MATCH_KEYBIT, + .bustype = BUS_SPI, + .keybit = { [BIT_WORD(KEY_FN)] = BIT_MASK(KEY_FN) }, + .driver_info = APPLETB_DEVID_KEYBOARD, + }, /* Builtin keyboard device */ + { + .flags = INPUT_DEVICE_ID_MATCH_BUS | + INPUT_DEVICE_ID_MATCH_KEYBIT, + .bustype = BUS_SPI, + .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, + .driver_info = APPLETB_DEVID_TOUCHPAD, + }, /* Builtin touchpad device */ + { }, /* Terminating zero entry */ +}; + +static int appletb_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver); + struct appletb_report_info *report_info; + int rc; + + /* initialize the report info */ + rc = appletb_fill_report_info(tb_dev, hdev); + if (rc < 0) + goto error; + + /* do setup if we have both interfaces */ + if (tb_dev->mode_info.hdev && tb_dev->disp_info.hdev) { + /* mark active */ + appletb_mark_active(tb_dev, true); + + /* initialize the touch bar */ + if (appletb_tb_def_fn_mode >= 0 && + appletb_tb_def_fn_mode <= APPLETB_FN_MODE_MAX) + tb_dev->fn_mode = appletb_tb_def_fn_mode; + else + tb_dev->fn_mode = APPLETB_FN_MODE_NORM; + appletb_set_idle_timeout(tb_dev, appletb_tb_def_idle_timeout); + appletb_set_dim_timeout(tb_dev, appletb_tb_def_dim_timeout); + tb_dev->last_event_time = ktime_get(); + + tb_dev->cur_tb_mode = APPLETB_CMD_MODE_OFF; + tb_dev->cur_tb_disp = APPLETB_CMD_DISP_OFF; + + appletb_update_touchbar(tb_dev, false); + + /* set up the input handler */ + tb_dev->inp_handler.event = appletb_inp_event; + tb_dev->inp_handler.connect = appletb_inp_connect; + tb_dev->inp_handler.disconnect = appletb_inp_disconnect; + tb_dev->inp_handler.name = "appletb"; + tb_dev->inp_handler.id_table = appletb_input_devices; + tb_dev->inp_handler.private = tb_dev; + + rc = input_register_handler(&tb_dev->inp_handler); + if (rc) { + dev_err(tb_dev->log_dev, + "Unable to register keyboard handler (%d)\n", + rc); + goto mark_inactive; + } + + /* initialize sysfs attributes */ + rc = sysfs_create_group(&tb_dev->mode_info.hdev->dev.kobj, + &appletb_attr_group); + if (rc) { + dev_err(tb_dev->log_dev, + "Failed to create sysfs attributes (%d)\n", rc); + goto unreg_handler; + } + + dev_info(tb_dev->log_dev, "Touchbar activated\n"); + } + + return 0; + +unreg_handler: + input_unregister_handler(&tb_dev->inp_handler); +mark_inactive: + appletb_mark_active(tb_dev, false); + cancel_delayed_work_sync(&tb_dev->tb_work); + + report_info = appletb_get_report_info(tb_dev, hdev); + if (report_info) { + usb_put_intf(report_info->usb_iface); + report_info->usb_iface = NULL; + report_info->hdev = NULL; + } +error: + return rc; +} + +static void appletb_remove(struct hid_device *hdev) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver); + struct appletb_report_info *report_info; + + if ((hdev == tb_dev->mode_info.hdev && tb_dev->disp_info.hdev) || + (hdev == tb_dev->disp_info.hdev && tb_dev->mode_info.hdev)) { + sysfs_remove_group(&tb_dev->mode_info.hdev->dev.kobj, + &appletb_attr_group); + + input_unregister_handler(&tb_dev->inp_handler); + + cancel_delayed_work_sync(&tb_dev->tb_work); + appletb_set_tb_mode(tb_dev, APPLETB_CMD_MODE_OFF); + appletb_set_tb_disp(tb_dev, APPLETB_CMD_DISP_ON); + + if (tb_dev->tb_autopm_off) + usb_autopm_put_interface(tb_dev->disp_info.usb_iface); + + appletb_mark_active(tb_dev, false); + + dev_info(tb_dev->log_dev, "Touchbar deactivated\n"); + } + + report_info = appletb_get_report_info(tb_dev, hdev); + if (report_info) { + usb_put_intf(report_info->usb_iface); + report_info->usb_iface = NULL; + report_info->hdev = NULL; + } +} + +#ifdef CONFIG_PM +static int appletb_suspend(struct hid_device *hdev, pm_message_t message) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver); + unsigned long flags; + bool all_suspended = false; + + if (message.event != PM_EVENT_SUSPEND && + message.event != PM_EVENT_FREEZE) + return 0; + + /* + * Wait for both interfaces to be suspended and no more async work + * in progress. + */ + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + if (!tb_dev->mode_info.suspended && !tb_dev->disp_info.suspended) { + tb_dev->active = false; + cancel_delayed_work(&tb_dev->tb_work); + } + + appletb_get_report_info(tb_dev, hdev)->suspended = true; + + if ((!tb_dev->mode_info.hdev || tb_dev->mode_info.suspended) && + (!tb_dev->disp_info.hdev || tb_dev->disp_info.suspended)) + all_suspended = true; + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + flush_delayed_work(&tb_dev->tb_work); + + if (!all_suspended) + return 0; + + /* + * The touch bar device itself remembers the last state when suspended + * in some cases, but in others (e.g. when mode != off and disp == off) + * it resumes with a different state; furthermore it may be only + * partially responsive in that state. By turning both mode and disp + * off we ensure it is in a good state when resuming (and this happens + * to be the same state after booting/resuming-from-hibernate, so less + * special casing between the two). + */ + if (message.event == PM_EVENT_SUSPEND) { + appletb_set_tb_mode(tb_dev, APPLETB_CMD_MODE_OFF); + appletb_set_tb_disp(tb_dev, APPLETB_CMD_DISP_OFF); + } + + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + tb_dev->cur_tb_mode = APPLETB_CMD_MODE_OFF; + tb_dev->cur_tb_disp = APPLETB_CMD_DISP_OFF; + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + dev_info(tb_dev->log_dev, "Touchbar suspended.\n"); + + return 0; +} + +static int appletb_reset_resume(struct hid_device *hdev) +{ + struct appletb_device *tb_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver); + unsigned long flags; + + /* + * Restore touch bar state. Note that autopm state is preserved, no need + * explicitly restore that here. + */ + spin_lock_irqsave(&tb_dev->tb_lock, flags); + + appletb_get_report_info(tb_dev, hdev)->suspended = false; + + if ((tb_dev->mode_info.hdev && !tb_dev->mode_info.suspended) && + (tb_dev->disp_info.hdev && !tb_dev->disp_info.suspended)) { + tb_dev->active = true; + tb_dev->restore_autopm = true; + tb_dev->last_event_time = ktime_get(); + + appletb_update_touchbar_no_lock(tb_dev, true); + + dev_info(tb_dev->log_dev, "Touchbar resumed.\n"); + } + + spin_unlock_irqrestore(&tb_dev->tb_lock, flags); + + return 0; +} +#endif + +static struct appletb_device *appletb_alloc_device(struct device *log_dev) +{ + struct appletb_device *tb_dev; + + /* allocate */ + tb_dev = kzalloc(sizeof(*tb_dev), GFP_KERNEL); + if (!tb_dev) + return NULL; + + /* initialize structures */ + spin_lock_init(&tb_dev->tb_lock); + INIT_DELAYED_WORK(&tb_dev->tb_work, appletb_set_tb_worker); + tb_dev->log_dev = log_dev; + + return tb_dev; +} + +static void appletb_free_device(struct appletb_device *tb_dev) +{ + cancel_delayed_work_sync(&tb_dev->tb_work); + kfree(tb_dev); +} + +static struct hid_driver appletb_hid_driver = { + .name = "apple-ib-touchbar", + .probe = appletb_probe, + .remove = appletb_remove, + .event = appletb_hid_event, + .input_configured = appletb_input_configured, +#ifdef CONFIG_PM + .suspend = appletb_suspend, + .reset_resume = appletb_reset_resume, +#endif +}; + +static int appletb_platform_probe(struct platform_device *pdev) +{ + struct appleib_platform_data *pdata = pdev->dev.platform_data; + struct appleib_device *ib_dev = pdata->ib_dev; + struct appletb_device *tb_dev; + int rc; + + tb_dev = appletb_alloc_device(pdata->log_dev); + if (!tb_dev) + return -ENOMEM; + + rc = appleib_register_hid_driver(ib_dev, &appletb_hid_driver, tb_dev); + if (rc) { + dev_err(tb_dev->log_dev, "Error registering hid driver: %d\n", + rc); + goto error; + } + + platform_set_drvdata(pdev, tb_dev); + + return 0; + +error: + appletb_free_device(tb_dev); + return rc; +} + +static int appletb_platform_remove(struct platform_device *pdev) +{ + struct appleib_platform_data *pdata = pdev->dev.platform_data; + struct appleib_device *ib_dev = pdata->ib_dev; + struct appletb_device *tb_dev = platform_get_drvdata(pdev); + int rc; + + rc = appleib_unregister_hid_driver(ib_dev, &appletb_hid_driver); + if (rc) { + dev_err(tb_dev->log_dev, "Error unregistering hid driver: %d\n", + rc); + goto error; + } + + appletb_free_device(tb_dev); + + return 0; + +error: + return rc; +} + +static const struct platform_device_id appletb_platform_ids[] = { + { .name = PLAT_NAME_IB_TB }, + { } +}; +MODULE_DEVICE_TABLE(platform, appletb_platform_ids); + +static struct platform_driver appletb_platform_driver = { + .id_table = appletb_platform_ids, + .driver = { + .name = "apple-ib-tb", + }, + .probe = appletb_platform_probe, + .remove = appletb_platform_remove, +}; + +module_platform_driver(appletb_platform_driver); + +MODULE_AUTHOR("Ronald Tschalär"); +MODULE_DESCRIPTION("MacBookPro Touch Bar driver"); +MODULE_LICENSE("GPL v2"); From patchwork Mon Apr 22 03:12:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Life is hard, and then you die" X-Patchwork-Id: 10910623 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 349E7112C for ; Mon, 22 Apr 2019 03:20:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1FE13285A3 for ; Mon, 22 Apr 2019 03:20:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0F6912864E; Mon, 22 Apr 2019 03:20:15 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 AFF77285A3 for ; Mon, 22 Apr 2019 03:20:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726407AbfDVDUE (ORCPT ); Sun, 21 Apr 2019 23:20:04 -0400 Received: from chill.innovation.ch ([216.218.245.220]:49782 "EHLO chill.innovation.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726583AbfDVDUE (ORCPT ); Sun, 21 Apr 2019 23:20:04 -0400 Received: from localhost (localhost [127.0.0.1]) by chill.innovation.ch (Postfix) with ESMTP id 32B56640155; Sun, 21 Apr 2019 20:13:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at Received: from chill.innovation.ch ([127.0.0.1]) by localhost (chill.innovation.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id x9wsRGzzCOZ4; Sun, 21 Apr 2019 20:12:58 -0700 (PDT) From: =?utf-8?q?Ronald_Tschal=C3=A4r?= DKIM-Filter: OpenDKIM Filter v2.10.3 chill.innovation.ch B73E0640145 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=innovation.ch; s=default; t=1555902778; bh=3KZpxM/X+bkoIFDwLLWG+Nz6Of7jL3JN85zQyKFLWgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eA2ooJPoh8yOSwToFJW7cJkxkh522oSYekKWTGRNTkSLdD2K2fvG1emOXj/3brECr KgbBD4AmxkGyWRsy1wzRGgaRQRJjhEdEyYXRU02y2mHhJIssjZ0diFp+EH4glhAS6D rJKWLOiUCIZfFWc/0abQfO5HB0czPshMmsbeFyH93JyNvU9TeKrwo2spwNuCSUMVZ7 Qh3kofbS+iOVWj33WuvxfAJR3nmFYrG0VnsijQsCf/EF/fW3bLmQXZvinm2IK/0jSB ykXGItjimSoFV+fSc8rdoS2W0Dp9bRm4P9lozKi+v9F2mltGWRi9u5JZA3EQ4XUohB s3kwF3QxzGt8A== To: Jiri Kosina , Benjamin Tissoires , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Lee Jones Cc: linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] iio: light: apple-ib-als: Add driver for ALS on iBridge chip. Date: Sun, 21 Apr 2019 20:12:51 -0700 Message-Id: <20190422031251.11968-4-ronald@innovation.ch> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190422031251.11968-1-ronald@innovation.ch> References: <20190422031251.11968-1-ronald@innovation.ch> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On 2016/2017 MacBook Pro's with a Touch Bar the ALS is attached to, and exposed via the iBridge device. This provides the driver for that sensor. Signed-off-by: Ronald Tschalär --- drivers/iio/light/Kconfig | 12 + drivers/iio/light/Makefile | 1 + drivers/iio/light/apple-ib-als.c | 694 +++++++++++++++++++++++++++++++ 3 files changed, 707 insertions(+) create mode 100644 drivers/iio/light/apple-ib-als.c diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 36f458433480..49159fab1c0e 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -64,6 +64,18 @@ config APDS9960 To compile this driver as a module, choose M here: the module will be called apds9960 +config APPLE_IBRIDGE_ALS + tristate "Apple iBridge ambient light sensor" + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + depends on MFD_APPLE_IBRIDGE + help + Say Y here to build the driver for the Apple iBridge ALS + sensor. + + To compile this driver as a module, choose M here: the + module will be called apple-ib-als. + config BH1750 tristate "ROHM BH1750 ambient light sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 286bf3975372..144d918917f7 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o obj-$(CONFIG_AL3320A) += al3320a.o obj-$(CONFIG_APDS9300) += apds9300.o obj-$(CONFIG_APDS9960) += apds9960.o +obj-$(CONFIG_APPLE_IBRIDGE_ALS) += apple-ib-als.o obj-$(CONFIG_BH1750) += bh1750.o obj-$(CONFIG_BH1780) += bh1780.o obj-$(CONFIG_CM32181) += cm32181.o diff --git a/drivers/iio/light/apple-ib-als.c b/drivers/iio/light/apple-ib-als.c new file mode 100644 index 000000000000..1718fcbe304f --- /dev/null +++ b/drivers/iio/light/apple-ib-als.c @@ -0,0 +1,694 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Apple Ambient Light Sensor Driver + * + * Copyright (c) 2017-2018 Ronald Tschalär + */ + +/* + * MacBookPro models with an iBridge chip (13,[23] and 14,[23]) have an + * ambient light sensor that is exposed via one of the USB interfaces on + * the iBridge as a standard HID light sensor. However, we cannot use the + * existing hid-sensor-als driver, for two reasons: + * + * 1. The hid-sensor-als driver is part of the hid-sensor-hub which in turn + * is a hid driver, but you can't have more than one hid driver per hid + * device, which is a problem because the touch bar also needs to + * register as a driver for this hid device. + * + * 2. While the hid-sensors-als driver stores sensor readings received via + * interrupt in an iio buffer, reads on the sysfs + * .../iio:deviceX/in_illuminance_YYY attribute result in a get of the + * feature report; however, in the case of this sensor here the + * illuminance field of that report is always 0. Instead, the input + * report needs to be requested. + */ + +#define dev_fmt(fmt) "als: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define APPLEALS_DYN_SENS 0 /* our dynamic sensitivity */ +#define APPLEALS_DEF_CHANGE_SENS APPLEALS_DYN_SENS + +struct appleals_device { + struct appleib_device *ib_dev; + struct device *log_dev; + struct hid_device *hid_dev; + struct hid_report *cfg_report; + struct hid_field *illum_field; + struct iio_dev *iio_dev; + struct iio_trigger *iio_trig; + int cur_sensitivity; + int cur_hysteresis; + bool events_enabled; +}; + +static struct hid_driver appleals_hid_driver; + +/* + * This is a primitive way to get a relative sensitivity, one where we get + * notified when the value changes by a certain percentage rather than some + * absolute value. MacOS somehow manages to configure the sensor to work this + * way (with a 15% relative sensitivity), but I haven't been able to figure + * out how so far. So until we do, this provides a less-than-perfect + * simulation. + * + * When the brightness value is within one of the ranges, the sensitivity is + * set to that range's sensitivity. But in order to reduce flapping when the + * brightness is right on the border between two ranges, the ranges overlap + * somewhat (by at least one sensitivity), and sensitivity is only changed if + * the value leaves the current sensitivity's range. + * + * The values chosen for the map are somewhat arbitrary: a compromise of not + * too many ranges (and hence changing the sensitivity) but not too small or + * large of a percentage of the min and max values in the range (currently + * from 7.5% to 30%, i.e. within a factor of 2 of 15%), as well as just plain + * "this feels reasonable to me". + */ +struct appleals_sensitivity_map { + int sensitivity; + int illum_low; + int illum_high; +}; + +static struct appleals_sensitivity_map appleals_sensitivity_map[] = { + { 1, 0, 14 }, + { 3, 10, 40 }, + { 9, 30, 120 }, + { 27, 90, 360 }, + { 81, 270, 1080 }, + { 243, 810, 3240 }, + { 729, 2430, 9720 }, +}; + +static int appleals_compute_sensitivity(int cur_illum, int cur_sens) +{ + struct appleals_sensitivity_map *entry; + int i; + + /* see if we're still in current range */ + for (i = 0; i < ARRAY_SIZE(appleals_sensitivity_map); i++) { + entry = &appleals_sensitivity_map[i]; + + if (entry->sensitivity == cur_sens && + entry->illum_low <= cur_illum && + entry->illum_high >= cur_illum) + return cur_sens; + else if (entry->sensitivity > cur_sens) + break; + } + + /* not in current range, so find new sensitivity */ + for (i = 0; i < ARRAY_SIZE(appleals_sensitivity_map); i++) { + entry = &appleals_sensitivity_map[i]; + + if (entry->illum_low <= cur_illum && + entry->illum_high >= cur_illum) + return entry->sensitivity; + } + + /* hmm, not in table, so assume we are above highest range */ + i = ARRAY_SIZE(appleals_sensitivity_map) - 1; + return appleals_sensitivity_map[i].sensitivity; +} + +static int appleals_get_field_value_for_usage(struct hid_field *field, + unsigned int usage) +{ + int u; + + if (!field) + return -1; + + for (u = 0; u < field->maxusage; u++) { + if (field->usage[u].hid == usage) + return u + field->logical_minimum; + } + + return -1; +} + +static __s32 appleals_get_field_value(struct appleals_device *als_dev, + struct hid_field *field) +{ + hid_hw_request(als_dev->hid_dev, field->report, HID_REQ_GET_REPORT); + hid_hw_wait(als_dev->hid_dev); + + return field->value[0]; +} + +static void appleals_set_field_value(struct appleals_device *als_dev, + struct hid_field *field, __s32 value) +{ + hid_set_field(field, 0, value); + hid_hw_request(als_dev->hid_dev, field->report, HID_REQ_SET_REPORT); +} + +static int appleals_get_config(struct appleals_device *als_dev, + unsigned int field_usage, __s32 *value) +{ + struct hid_field *field; + + field = appleib_find_report_field(als_dev->cfg_report, field_usage); + if (!field) + return -EINVAL; + + *value = appleals_get_field_value(als_dev, field); + + return 0; +} + +static int appleals_set_config(struct appleals_device *als_dev, + unsigned int field_usage, __s32 value) +{ + struct hid_field *field; + + field = appleib_find_report_field(als_dev->cfg_report, field_usage); + if (!field) + return -EINVAL; + + appleals_set_field_value(als_dev, field, value); + + return 0; +} + +static int appleals_set_enum_config(struct appleals_device *als_dev, + unsigned int field_usage, + unsigned int value_usage) +{ + struct hid_field *field; + int value; + + field = appleib_find_report_field(als_dev->cfg_report, field_usage); + if (!field) + return -EINVAL; + + value = appleals_get_field_value_for_usage(field, value_usage); + + appleals_set_field_value(als_dev, field, value); + + return 0; +} + +static void appleals_update_dyn_sensitivity(struct appleals_device *als_dev, + __s32 value) +{ + int new_sens; + int rc; + + new_sens = appleals_compute_sensitivity(value, + als_dev->cur_sensitivity); + if (new_sens != als_dev->cur_sensitivity) { + rc = appleals_set_config(als_dev, + HID_USAGE_SENSOR_LIGHT_ILLUM | + HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS, + new_sens); + if (!rc) + als_dev->cur_sensitivity = new_sens; + } +} + +static void appleals_push_new_value(struct appleals_device *als_dev, + __s32 value) +{ + __s32 buf[2] = { value, value }; + + iio_push_to_buffers(als_dev->iio_dev, buf); + + if (als_dev->cur_hysteresis == APPLEALS_DYN_SENS) + appleals_update_dyn_sensitivity(als_dev, value); +} + +static int appleals_hid_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct appleals_device *als_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), + &appleals_hid_driver); + int rc = 0; + + if ((usage->hid & HID_USAGE_PAGE) != HID_UP_SENSOR) + return 0; + + if (usage->hid == HID_USAGE_SENSOR_LIGHT_ILLUM) { + appleals_push_new_value(als_dev, value); + rc = 1; + } + + return rc; +} + +static int appleals_enable_events(struct iio_trigger *trig, bool enable) +{ + struct appleals_device *als_dev = iio_trigger_get_drvdata(trig); + int value; + + /* set the sensor's reporting state */ + appleals_set_enum_config(als_dev, HID_USAGE_SENSOR_PROP_REPORT_STATE, + enable ? HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM : + HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM); + als_dev->events_enabled = enable; + + /* if the sensor was enabled, push an initial value */ + if (enable) { + value = appleals_get_field_value(als_dev, als_dev->illum_field); + appleals_push_new_value(als_dev, value); + } + + return 0; +} + +static int appleals_read_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct appleals_device *als_dev = + *(struct appleals_device **)iio_priv(iio_dev); + __s32 value; + int rc; + + *val = 0; + *val2 = 0; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: + *val = appleals_get_field_value(als_dev, als_dev->illum_field); + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SAMP_FREQ: + rc = appleals_get_config(als_dev, + HID_USAGE_SENSOR_PROP_REPORT_INTERVAL, + &value); + if (rc) + return rc; + + /* interval is in ms; val is in HZ, val2 in µHZ */ + value = 1000000000 / value; + *val = value / 1000000; + *val2 = value - (*val * 1000000); + + return IIO_VAL_INT_PLUS_MICRO; + + case IIO_CHAN_INFO_HYSTERESIS: + if (als_dev->cur_hysteresis == APPLEALS_DYN_SENS) { + *val = als_dev->cur_hysteresis; + return IIO_VAL_INT; + } + + rc = appleals_get_config(als_dev, + HID_USAGE_SENSOR_LIGHT_ILLUM | + HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS, + val); + if (!rc) { + als_dev->cur_sensitivity = *val; + als_dev->cur_hysteresis = *val; + } + return rc ? rc : IIO_VAL_INT; + + default: + return -EINVAL; + } +} + +static int appleals_write_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct appleals_device *als_dev = + *(struct appleals_device **)iio_priv(iio_dev); + __s32 illum; + int rc; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + rc = appleals_set_config(als_dev, + HID_USAGE_SENSOR_PROP_REPORT_INTERVAL, + 1000000000 / (val * 1000000 + val2)); + break; + + case IIO_CHAN_INFO_HYSTERESIS: + if (val == APPLEALS_DYN_SENS) { + if (als_dev->cur_hysteresis != APPLEALS_DYN_SENS) { + als_dev->cur_hysteresis = val; + illum = appleals_get_field_value(als_dev, + als_dev->illum_field); + appleals_update_dyn_sensitivity(als_dev, illum); + } + rc = 0; + break; + } + + rc = appleals_set_config(als_dev, + HID_USAGE_SENSOR_LIGHT_ILLUM | + HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS, + val); + if (!rc) { + als_dev->cur_sensitivity = val; + als_dev->cur_hysteresis = val; + } + break; + + default: + rc = -EINVAL; + } + + return rc; +} + +static const struct iio_chan_spec appleals_channels[] = { + { + .type = IIO_INTENSITY, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_BOTH, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_HYSTERESIS), + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + }, + .scan_index = 0, + }, + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_HYSTERESIS), + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + }, + .scan_index = 1, + } +}; + +static const struct iio_trigger_ops appleals_trigger_ops = { + .set_trigger_state = &appleals_enable_events, +}; + +static const struct iio_info appleals_info = { + .read_raw = &appleals_read_raw, + .write_raw = &appleals_write_raw, +}; + +static void appleals_config_sensor(struct appleals_device *als_dev, + bool events_enabled, int sensitivity) +{ + struct hid_field *field; + __s32 val; + + /* + * We're (often) in a probe here, so need to enable input processing + * in that case, but only in that case. + */ + if (appleib_in_hid_probe(als_dev->ib_dev)) + hid_device_io_start(als_dev->hid_dev); + + /* power on the sensor */ + field = appleib_find_report_field(als_dev->cfg_report, + HID_USAGE_SENSOR_PROY_POWER_STATE); + val = appleals_get_field_value_for_usage(field, + HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM); + hid_set_field(field, 0, val); + + /* configure reporting of change events */ + field = appleib_find_report_field(als_dev->cfg_report, + HID_USAGE_SENSOR_PROP_REPORT_STATE); + val = appleals_get_field_value_for_usage(field, + events_enabled ? + HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM : + HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM); + hid_set_field(field, 0, val); + + /* report change events asap */ + field = appleib_find_report_field(als_dev->cfg_report, + HID_USAGE_SENSOR_PROP_REPORT_INTERVAL); + hid_set_field(field, 0, field->logical_minimum); + + /* + * Set initial change sensitivity; if dynamic, enabling trigger will set + * it instead. + */ + if (sensitivity != APPLEALS_DYN_SENS) { + field = appleib_find_report_field(als_dev->cfg_report, + HID_USAGE_SENSOR_LIGHT_ILLUM | + HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS); + + hid_set_field(field, 0, sensitivity); + } + + /* write the new config to the sensor */ + hid_hw_request(als_dev->hid_dev, als_dev->cfg_report, + HID_REQ_SET_REPORT); + + if (appleib_in_hid_probe(als_dev->ib_dev)) + hid_device_io_stop(als_dev->hid_dev); +}; + +static int appleals_config_iio(struct appleals_device *als_dev) +{ + struct iio_dev *iio_dev; + struct iio_trigger *iio_trig; + int rc; + + /* create and register iio device */ + iio_dev = iio_device_alloc(sizeof(als_dev)); + if (!iio_dev) + return -ENOMEM; + + *(struct appleals_device **)iio_priv(iio_dev) = als_dev; + + iio_dev->channels = appleals_channels; + iio_dev->num_channels = ARRAY_SIZE(appleals_channels); + iio_dev->dev.parent = &als_dev->hid_dev->dev; + iio_dev->info = &appleals_info; + iio_dev->name = "als"; + iio_dev->modes = INDIO_DIRECT_MODE; + + rc = iio_triggered_buffer_setup(iio_dev, &iio_pollfunc_store_time, NULL, + NULL); + if (rc) { + dev_err(als_dev->log_dev, "failed to set up iio triggers: %d\n", + rc); + goto free_iio_dev; + } + + iio_trig = iio_trigger_alloc("%s-dev%d", iio_dev->name, iio_dev->id); + if (!iio_trig) { + rc = -ENOMEM; + goto clean_trig_buf; + } + + iio_trig->dev.parent = &als_dev->hid_dev->dev; + iio_trig->ops = &appleals_trigger_ops; + iio_trigger_set_drvdata(iio_trig, als_dev); + + rc = iio_trigger_register(iio_trig); + if (rc) { + dev_err(als_dev->log_dev, "failed to register iio trigger: %d\n", + rc); + goto free_iio_trig; + } + + als_dev->iio_trig = iio_trig; + + rc = iio_device_register(iio_dev); + if (rc) { + dev_err(als_dev->log_dev, "failed to register iio device: %d\n", + rc); + goto unreg_iio_trig; + } + + als_dev->iio_dev = iio_dev; + + return 0; + +unreg_iio_trig: + iio_trigger_unregister(iio_trig); +free_iio_trig: + iio_trigger_free(iio_trig); + als_dev->iio_trig = NULL; +clean_trig_buf: + iio_triggered_buffer_cleanup(iio_dev); +free_iio_dev: + iio_device_free(iio_dev); + + return rc; +} + +static int appleals_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct appleals_device *als_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), + &appleals_hid_driver); + struct hid_field *state_field; + struct hid_field *illum_field; + int rc; + + /* find als fields and reports */ + state_field = appleib_find_hid_field(hdev, HID_USAGE_SENSOR_ALS, + HID_USAGE_SENSOR_PROP_REPORT_STATE); + illum_field = appleib_find_hid_field(hdev, HID_USAGE_SENSOR_ALS, + HID_USAGE_SENSOR_LIGHT_ILLUM); + if (!state_field || !illum_field) + return -ENODEV; + + if (als_dev->hid_dev) { + dev_warn(als_dev->log_dev, + "Found duplicate ambient light sensor - ignoring\n"); + return -EBUSY; + } + + dev_info(als_dev->log_dev, "Found ambient light sensor\n"); + + /* initialize device */ + als_dev->hid_dev = hdev; + als_dev->cfg_report = state_field->report; + als_dev->illum_field = illum_field; + + als_dev->cur_hysteresis = APPLEALS_DEF_CHANGE_SENS; + als_dev->cur_sensitivity = APPLEALS_DEF_CHANGE_SENS; + appleals_config_sensor(als_dev, false, als_dev->cur_sensitivity); + + rc = appleals_config_iio(als_dev); + if (rc) + return rc; + + return 0; +} + +static void appleals_remove(struct hid_device *hdev) +{ + struct appleals_device *als_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), + &appleals_hid_driver); + + if (als_dev->iio_dev) { + iio_device_unregister(als_dev->iio_dev); + + iio_trigger_unregister(als_dev->iio_trig); + iio_trigger_free(als_dev->iio_trig); + als_dev->iio_trig = NULL; + + iio_triggered_buffer_cleanup(als_dev->iio_dev); + iio_device_free(als_dev->iio_dev); + als_dev->iio_dev = NULL; + } + + als_dev->hid_dev = NULL; +} + +#ifdef CONFIG_PM +static int appleals_reset_resume(struct hid_device *hdev) +{ + struct appleals_device *als_dev = + appleib_get_drvdata(hid_get_drvdata(hdev), + &appleals_hid_driver); + + appleals_config_sensor(als_dev, als_dev->events_enabled, + als_dev->cur_sensitivity); + + return 0; +} +#endif + +static struct hid_driver appleals_hid_driver = { + .name = "apple-ib-als", + .probe = appleals_probe, + .remove = appleals_remove, + .event = appleals_hid_event, +#ifdef CONFIG_PM + .reset_resume = appleals_reset_resume, +#endif +}; + +static int appleals_platform_probe(struct platform_device *pdev) +{ + struct appleib_platform_data *pdata = pdev->dev.platform_data; + struct appleib_device *ib_dev = pdata->ib_dev; + struct appleals_device *als_dev; + int rc; + + als_dev = kzalloc(sizeof(*als_dev), GFP_KERNEL); + if (!als_dev) + return -ENOMEM; + + als_dev->ib_dev = ib_dev; + als_dev->log_dev = pdata->log_dev; + + rc = appleib_register_hid_driver(ib_dev, &appleals_hid_driver, als_dev); + if (rc) { + dev_err(als_dev->log_dev, "Error registering hid driver: %d\n", + rc); + goto error; + } + + platform_set_drvdata(pdev, als_dev); + + return 0; + +error: + kfree(als_dev); + return rc; +} + +static int appleals_platform_remove(struct platform_device *pdev) +{ + struct appleib_platform_data *pdata = pdev->dev.platform_data; + struct appleib_device *ib_dev = pdata->ib_dev; + struct appleals_device *als_dev = platform_get_drvdata(pdev); + int rc; + + rc = appleib_unregister_hid_driver(ib_dev, &appleals_hid_driver); + if (rc) { + dev_err(als_dev->log_dev, + "Error unregistering hid driver: %d\n", rc); + goto error; + } + + kfree(als_dev); + + return 0; + +error: + return rc; +} + +static const struct platform_device_id appleals_platform_ids[] = { + { .name = PLAT_NAME_IB_ALS }, + { } +}; +MODULE_DEVICE_TABLE(platform, appleals_platform_ids); + +static struct platform_driver appleals_platform_driver = { + .id_table = appleals_platform_ids, + .driver = { + .name = "apple-ib-als", + }, + .probe = appleals_platform_probe, + .remove = appleals_platform_remove, +}; + +module_platform_driver(appleals_platform_driver); + +MODULE_AUTHOR("Ronald Tschalär"); +MODULE_DESCRIPTION("Apple iBridge ALS driver"); +MODULE_LICENSE("GPL v2");