* [PATCH 4/5] HID: apple-ibridge: Add Apple iBridge HID driver for T1 chip.
2021-02-28 1:26 [PATCH 0/5] Touch Bar and ALS support for MacBook Pro's Ronald Tschalär
` (2 preceding siblings ...)
2021-02-28 1:26 ` [PATCH 3/5] HID: core: Export some report item parsing functions Ronald Tschalär
@ 2021-02-28 1:26 ` Ronald Tschalär
2021-02-28 15:02 ` Jonathan Cameron
2021-03-01 14:12 ` Andy Shevchenko
2021-02-28 1:26 ` [PATCH 5/5] HID: apple-touchbar - Add driver for the Touch Bar on MacBook Pro's Ronald Tschalär
2021-02-28 14:38 ` [PATCH 0/5] Touch Bar and ALS support for " Jonathan Cameron
5 siblings, 2 replies; 17+ messages in thread
From: Ronald Tschalär @ 2021-02-28 1:26 UTC (permalink / raw)
To: Jiri Kosina, Benjamin Tissoires, Jonathan Cameron,
Srinivas Pandruvada, Lars-Peter Clausen, Peter Meerwald-Stadler
Cc: linux-kernel, linux-input, linux-iio
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, the
functionality for the touch bar and light sensor is exposed via USB HID
interfaces, and on devices with the T1 chip one of the HID devices is
used for both functions. So this driver creates virtual HID devices, one
per top-level report collection on each HID device (for a total of 3
virtual HID devices). The sub-drivers then bind to these virtual HID
devices.
This way the Touch Bar and ALS drivers can be kept in their own modules,
while at the same time making them look very much like as if they were
connected to the real HID devices. And those drivers then work (mostly)
without further changes on MacBooks with the T2 chip that don't need
this driver.
Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
---
drivers/hid/Kconfig | 16 +
drivers/hid/Makefile | 1 +
drivers/hid/apple-ibridge.c | 682 ++++++++++++++++++++++++++++++++++++
drivers/hid/apple-ibridge.h | 15 +
drivers/hid/hid-ids.h | 1 +
drivers/hid/hid-quirks.c | 3 +
6 files changed, 718 insertions(+)
create mode 100644 drivers/hid/apple-ibridge.c
create mode 100644 drivers/hid/apple-ibridge.h
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 09fa75a2b289e..579c45c3e36e5 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -136,6 +136,22 @@ 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
+ tristate "Apple iBridge"
+ depends on ACPI
+ depends on USB_HID
+ depends on X86 || COMPILE_TEST
+ imply HID_SENSOR_HUB
+ imply HID_SENSOR_ALS
+ help
+ This module provides the core support for the Apple T1 chip found
+ on 2016 and 2017 MacBookPro's, also known as the iBridge. The drivers
+ for the Touch Bar (apple-touchbar) and light sensor (hid-sensor-hub
+ and hid-sensor-als) need to be enabled separately.
+
+ To compile this driver as a module, choose M here: the
+ module will be called apple-ibridge.
+
config HID_APPLEIR
tristate "Apple infrared receiver"
depends on (USB_HID)
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 014d21fe7dac6..d29a3934bfaa9 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-$(CONFIG_HID_APPLE_IBRIDGE) += apple-ibridge.o
obj-$(CONFIG_HID_APPLEIR) += hid-appleir.o
obj-$(CONFIG_HID_CREATIVE_SB0540) += hid-creative-sb0540.o
obj-$(CONFIG_HID_ASUS) += hid-asus.o
diff --git a/drivers/hid/apple-ibridge.c b/drivers/hid/apple-ibridge.c
new file mode 100644
index 0000000000000..5f2b71c199746
--- /dev/null
+++ b/drivers/hid/apple-ibridge.c
@@ -0,0 +1,682 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Apple iBridge Driver
+ *
+ * Copyright (c) 2018 Ronald Tschalär
+ */
+
+/**
+ * DOC: Overview
+ *
+ * 2016 and 2017 MacBookPro models with a Touch Bar (MacBookPro13,[23] and
+ * MacBookPro14,[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)'.
+ *
+ * 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. The webcam interfaces are
+ * already handled by the uvcvideo driver. However, there is a problem with
+ * the other two interfaces: one of them contains functionality (HID reports)
+ * used by both the touch bar and the ALS, which is an issue because the kernel
+ * allows only one driver to be attached to a given device. This driver exists
+ * to solve this issue.
+ *
+ * This driver is implemented as a HID driver that attaches to both HID
+ * interfaces and in turn creates several virtual child HID devices, one for
+ * each top-level collection found in each interfaces report descriptor. The
+ * touch bar and ALS drivers then attach to these virtual HID devices, and this
+ * driver forwards the operations between the real and virtual devices.
+ *
+ * One important aspect of this approach is that resulting (virtual) HID
+ * devices look much like the HID devices found on the later MacBookPro models
+ * which have a T2 chip, where there are separate USB interfaces for the touch
+ * bar and ALS functionality, which means that the touch bar and ALS drivers
+ * work (mostly) the same on both types of models.
+ *
+ * Lastly, this driver also takes care of the power-management for the
+ * iBridge when suspending and resuming.
+ */
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include "hid-ids.h"
+#include "../hid/usbhid/usbhid.h"
+#include "apple-ibridge.h"
+
+#define APPLEIB_BASIC_CONFIG 1
+
+#define LOG_DEV(ib_dev) (&(ib_dev)->acpi_dev->dev)
+
+static struct hid_device_id appleib_sub_hid_ids[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_LINUX_FOUNDATION,
+ USB_DEVICE_ID_IBRIDGE_TB) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_LINUX_FOUNDATION,
+ USB_DEVICE_ID_IBRIDGE_ALS) },
+};
+
+static struct {
+ unsigned int usage;
+ struct hid_device_id *dev_id;
+} appleib_usage_map[] = {
+ /* Default iBridge configuration, key inputs and mode settings */
+ { 0x00010006, &appleib_sub_hid_ids[0] },
+ /* OS X iBridge configuration, digitizer inputs */
+ { 0x000D0005, &appleib_sub_hid_ids[0] },
+ /* All iBridge configurations, display/DFR settings */
+ { 0xFF120001, &appleib_sub_hid_ids[0] },
+ /* All iBridge configurations, ALS */
+ { 0x00200041, &appleib_sub_hid_ids[1] },
+};
+
+struct appleib_device {
+ struct acpi_device *acpi_dev;
+ acpi_handle asoc_socw;
+};
+
+struct appleib_hid_dev_info {
+ struct hid_device *hdev;
+ struct hid_device *sub_hdevs[ARRAY_SIZE(appleib_sub_hid_ids)];
+ bool sub_open[ARRAY_SIZE(appleib_sub_hid_ids)];
+};
+
+static int appleib_hid_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
+{
+ struct appleib_hid_dev_info *hdev_info = hid_get_drvdata(hdev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hdev_info->sub_hdevs); i++) {
+ if (READ_ONCE(hdev_info->sub_open[i]))
+ hid_input_report(hdev_info->sub_hdevs[i], report->type,
+ data, size, 0);
+ }
+
+ return 0;
+}
+
+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;
+}
+
+#ifdef CONFIG_PM
+/**
+ * appleib_forward_int_op() - Forward a hid-driver callback to all drivers on
+ * all virtual HID devices attached to the given real HID device.
+ * @hdev the real hid-device
+ * @forward a function that calls the callback on the given driver
+ * @args arguments for the forward function
+ *
+ * This is for callbacks that return a status as an int.
+ *
+ * Returns: 0 on success, or the first error returned by the @forward function.
+ */
+static int appleib_forward_int_op(struct hid_device *hdev,
+ int (*forward)(struct hid_driver *,
+ struct hid_device *, void *),
+ void *args)
+{
+ struct appleib_hid_dev_info *hdev_info = hid_get_drvdata(hdev);
+ struct hid_device *sub_hdev;
+ int rc = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hdev_info->sub_hdevs); i++) {
+ sub_hdev = hdev_info->sub_hdevs[i];
+ if (sub_hdev->driver) {
+ rc = forward(sub_hdev->driver, sub_hdev, args);
+ if (rc)
+ break;
+ }
+
+ break;
+ }
+
+ return rc;
+}
+
+static int appleib_hid_suspend_fwd(struct hid_driver *drv,
+ struct hid_device *hdev, void *args)
+{
+ int rc = 0;
+
+ if (drv->suspend)
+ rc = drv->suspend(hdev, *(pm_message_t *)args);
+
+ return rc;
+}
+
+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 hid_driver *drv,
+ struct hid_device *hdev, void *args)
+{
+ int rc = 0;
+
+ if (drv->resume)
+ rc = drv->resume(hdev);
+
+ return rc;
+}
+
+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 hid_driver *drv,
+ struct hid_device *hdev, void *args)
+{
+ int rc = 0;
+
+ if (drv->reset_resume)
+ rc = drv->reset_resume(hdev);
+
+ return rc;
+}
+
+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 */
+
+static int appleib_ll_start(struct hid_device *hdev)
+{
+ return 0;
+}
+
+static void appleib_ll_stop(struct hid_device *hdev)
+{
+}
+
+static int appleib_set_open(struct hid_device *hdev, bool open)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hdev_info->sub_hdevs); i++) {
+ /*
+ * hid_hw_open(), and hence appleib_ll_open(), is called
+ * from the driver's probe function, which in turn is called
+ * while adding the sub-hdev; but at this point we haven't yet
+ * added the sub-hdev to our list. So if we don't find the
+ * sub-hdev in our list assume it's in the process of being
+ * added and set the flag on the first unset sub-hdev.
+ */
+ if (hdev_info->sub_hdevs[i] == hdev ||
+ !hdev_info->sub_hdevs[i]) {
+ WRITE_ONCE(hdev_info->sub_open[i], open);
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+static int appleib_ll_open(struct hid_device *hdev)
+{
+ return appleib_set_open(hdev, true);
+}
+
+static void appleib_ll_close(struct hid_device *hdev)
+{
+ appleib_set_open(hdev, false);
+}
+
+static int appleib_ll_power(struct hid_device *hdev, int level)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+
+ return hid_hw_power(hdev_info->hdev, level);
+}
+
+static int appleib_ll_parse(struct hid_device *hdev)
+{
+ /* we've already called hid_parse_report() */
+ return 0;
+}
+
+static void appleib_ll_request(struct hid_device *hdev,
+ struct hid_report *report, int reqtype)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+
+ hid_hw_request(hdev_info->hdev, report, reqtype);
+}
+
+static int appleib_ll_wait(struct hid_device *hdev)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+
+ hid_hw_wait(hdev_info->hdev);
+ return 0;
+}
+
+static int appleib_ll_raw_request(struct hid_device *hdev,
+ unsigned char reportnum, __u8 *buf,
+ size_t len, unsigned char rtype, int reqtype)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+
+ return hid_hw_raw_request(hdev_info->hdev, reportnum, buf, len, rtype,
+ reqtype);
+}
+
+static int appleib_ll_output_report(struct hid_device *hdev, __u8 *buf,
+ size_t len)
+{
+ struct appleib_hid_dev_info *hdev_info = hdev->driver_data;
+
+ return hid_hw_output_report(hdev_info->hdev, buf, len);
+}
+
+static struct hid_ll_driver appleib_ll_driver = {
+ .start = appleib_ll_start,
+ .stop = appleib_ll_stop,
+ .open = appleib_ll_open,
+ .close = appleib_ll_close,
+ .power = appleib_ll_power,
+ .parse = appleib_ll_parse,
+ .request = appleib_ll_request,
+ .wait = appleib_ll_wait,
+ .raw_request = appleib_ll_raw_request,
+ .output_report = appleib_ll_output_report,
+};
+
+static __u8 *appleib_find_collection(__u8 *start, __u8 *end,
+ unsigned int *usage)
+{
+ struct hid_item item;
+ int depth = 0;
+
+ *usage = 0;
+
+ while ((start = hid_fetch_item(start, end, &item)) != NULL) {
+ if (item.type == HID_ITEM_TYPE_MAIN) {
+ switch (item.tag) {
+ case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
+ depth++;
+ break;
+
+ case HID_MAIN_ITEM_TAG_END_COLLECTION:
+ depth--;
+ if (depth <= 0)
+ return start;
+ break;
+ }
+ } else if (item.type == HID_ITEM_TYPE_GLOBAL &&
+ item.tag == HID_GLOBAL_ITEM_TAG_USAGE_PAGE &&
+ depth == 0) {
+ *usage = (*usage & 0x0000FFFF) |
+ ((hid_item_udata(&item) & 0xFFFF) << 16);
+ } else if (item.type == HID_ITEM_TYPE_LOCAL &&
+ item.tag == HID_LOCAL_ITEM_TAG_USAGE &&
+ depth == 0) {
+ *usage = (*usage & 0xFFFF0000) |
+ (hid_item_udata(&item) & 0xFFFF);
+ }
+ }
+
+ return end;
+}
+
+static struct hid_device_id *appleib_find_dev_id_for_usage(unsigned int usage)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(appleib_usage_map); i++) {
+ if (appleib_usage_map[i].usage == usage)
+ return appleib_usage_map[i].dev_id;
+ }
+
+ return NULL;
+}
+
+static struct hid_device *
+appleib_add_sub_dev(struct appleib_hid_dev_info *hdev_info,
+ struct hid_device_id *dev_id, u8 *rdesc, size_t rsize)
+{
+ struct hid_device *sub_hdev;
+ int rc;
+
+ sub_hdev = hid_allocate_device();
+ if (IS_ERR(sub_hdev))
+ return sub_hdev;
+
+ sub_hdev->dev.parent = &hdev_info->hdev->dev;
+
+ sub_hdev->bus = dev_id->bus;
+ sub_hdev->group = dev_id->group;
+ sub_hdev->vendor = dev_id->vendor;
+ sub_hdev->product = dev_id->product;
+
+ sub_hdev->ll_driver = &appleib_ll_driver;
+
+ snprintf(sub_hdev->name, sizeof(sub_hdev->name),
+ "iBridge Virtual HID %s/%04x:%04x",
+ dev_name(sub_hdev->dev.parent), sub_hdev->vendor,
+ sub_hdev->product);
+
+ sub_hdev->driver_data = hdev_info;
+
+ rc = hid_parse_report(sub_hdev, rdesc, rsize);
+ if (rc) {
+ hid_destroy_device(sub_hdev);
+ return ERR_PTR(rc);
+ }
+
+ rc = hid_add_device(sub_hdev);
+ if (rc) {
+ hid_destroy_device(sub_hdev);
+ return ERR_PTR(rc);
+ }
+
+ return sub_hdev;
+}
+
+static struct appleib_hid_dev_info *appleib_add_device(struct hid_device *hdev)
+{
+ struct appleib_hid_dev_info *hdev_info;
+ __u8 *start = hdev->dev_rdesc;
+ __u8 *end = start + hdev->dev_rsize;
+ __u8 *pos;
+ struct hid_device_id *dev_id;
+ unsigned int usage;
+ int i;
+
+ hdev_info = devm_kzalloc(&hdev->dev, sizeof(*hdev_info), GFP_KERNEL);
+ if (!hdev_info)
+ return ERR_PTR(-ENOMEM);
+
+ hdev_info->hdev = hdev;
+
+ for (i = 0; ; ) {
+ pos = appleib_find_collection(start, end, &usage);
+
+ dev_id = appleib_find_dev_id_for_usage(usage);
+ if (!dev_id) {
+ hid_warn(hdev, "Unknown collection encountered with usage %x\n",
+ usage);
+
+ } else if (i >= ARRAY_SIZE(hdev_info->sub_hdevs)) {
+ hid_warn(hdev, "Too many collections encountered - ignoring for usage %x\n",
+ usage);
+ } else {
+ hdev_info->sub_hdevs[i] =
+ appleib_add_sub_dev(hdev_info, dev_id, start,
+ pos - start);
+ if (IS_ERR(hdev_info->sub_hdevs[i])) {
+ while (i-- > 0)
+ hid_destroy_device(hdev_info->sub_hdevs[i]);
+ return (void *)hdev_info->sub_hdevs[i];
+ }
+
+ i++;
+ }
+
+ start = pos;
+ if (start >= end)
+ break;
+ }
+
+ return hdev_info;
+}
+
+static void appleib_remove_device(struct hid_device *hdev)
+{
+ struct appleib_hid_dev_info *hdev_info = hid_get_drvdata(hdev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hdev_info->sub_hdevs); i++) {
+ if (hdev_info->sub_hdevs[i])
+ hid_destroy_device(hdev_info->sub_hdevs[i]);
+ }
+
+ hid_set_drvdata(hdev, NULL);
+}
+
+static int appleib_hid_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ struct appleib_hid_dev_info *hdev_info;
+ struct usb_device *udev;
+ int rc;
+
+ /* check and set usb config first */
+ udev = hid_to_usb_dev(hdev);
+
+ if (udev->actconfig->desc.bConfigurationValue != APPLEIB_BASIC_CONFIG) {
+ rc = usb_driver_set_configuration(udev, APPLEIB_BASIC_CONFIG);
+ return rc ? rc : -ENODEV;
+ }
+
+ rc = hid_parse(hdev);
+ if (rc) {
+ hid_err(hdev, "ib: hid parse failed (%d)\n", rc);
+ goto error;
+ }
+
+ rc = hid_hw_start(hdev, HID_CONNECT_DRIVER);
+ if (rc) {
+ hid_err(hdev, "ib: hw start failed (%d)\n", rc);
+ goto error;
+ }
+
+ hdev_info = appleib_add_device(hdev);
+ if (IS_ERR(hdev_info)) {
+ rc = PTR_ERR(hdev_info);
+ goto stop_hw;
+ }
+
+ hid_set_drvdata(hdev, hdev_info);
+
+ rc = hid_hw_open(hdev);
+ if (rc) {
+ hid_err(hdev, "ib: failed to open hid: %d\n", rc);
+ goto remove_dev;
+ }
+
+ return 0;
+
+remove_dev:
+ appleib_remove_device(hdev);
+stop_hw:
+ hid_hw_stop(hdev);
+error:
+ return rc;
+}
+
+static void appleib_hid_remove(struct hid_device *hdev)
+{
+ hid_hw_close(hdev);
+ appleib_remove_device(hdev);
+ hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id appleib_hid_ids[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IBRIDGE) },
+ { },
+};
+
+static struct hid_driver appleib_hid_driver = {
+ .name = "apple-ibridge-hid",
+ .id_table = appleib_hid_ids,
+ .probe = appleib_hid_probe,
+ .remove = appleib_hid_remove,
+ .raw_event = appleib_hid_raw_event,
+ .report_fixup = appleib_report_fixup,
+#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;
+
+ ib_dev = devm_kzalloc(&acpi_dev->dev, sizeof(*ib_dev), GFP_KERNEL);
+ if (!ib_dev)
+ return ERR_PTR(-ENOMEM);
+
+ ib_dev->acpi_dev = acpi_dev;
+
+ /* get iBridge acpi power control method for suspend/resume */
+ 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));
+ return ERR_PTR(-ENXIO);
+ }
+
+ /* 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;
+}
+
+static int appleib_probe(struct acpi_device *acpi)
+{
+ struct appleib_device *ib_dev;
+ int ret;
+
+ ib_dev = appleib_alloc_device(acpi);
+ if (IS_ERR(ib_dev))
+ return PTR_ERR(ib_dev);
+
+ ret = hid_register_driver(&appleib_hid_driver);
+ if (ret) {
+ dev_err(LOG_DEV(ib_dev), "Error registering hid driver: %d\n",
+ ret);
+ return ret;
+ }
+
+ acpi->driver_data = ib_dev;
+
+ return 0;
+}
+
+static int appleib_remove(struct acpi_device *acpi)
+{
+ hid_unregister_driver(&appleib_hid_driver);
+
+ return 0;
+}
+
+static int appleib_suspend(struct device *dev)
+{
+ struct appleib_device *ib_dev;
+ int rc;
+
+ ib_dev = acpi_driver_data(to_acpi_device(dev));
+
+ rc = acpi_execute_simple_method(ib_dev->asoc_socw, NULL, 0);
+ if (ACPI_FAILURE(rc))
+ dev_warn(dev, "SOCW(0) failed: %s\n",
+ acpi_format_exception(rc));
+
+ return 0;
+}
+
+static int appleib_resume(struct device *dev)
+{
+ struct appleib_device *ib_dev;
+ int rc;
+
+ ib_dev = acpi_driver_data(to_acpi_device(dev));
+
+ rc = acpi_execute_simple_method(ib_dev->asoc_socw, NULL, 1);
+ if (ACPI_FAILURE(rc))
+ dev_warn(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 = "apple_ibridge",
+ .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/drivers/hid/apple-ibridge.h b/drivers/hid/apple-ibridge.h
new file mode 100644
index 0000000000000..8aefcf61589aa
--- /dev/null
+++ b/drivers/hid/apple-ibridge.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Apple iBridge Driver
+ *
+ * Copyright (c) 2018 Ronald Tschalär
+ */
+
+#ifndef __LINUX_APPLE_IBRDIGE_H
+#define __LINUX_APPLE_IBRDIGE_H
+
+#define USB_VENDOR_ID_LINUX_FOUNDATION 0x1d6b
+#define USB_DEVICE_ID_IBRIDGE_TB 0x0301
+#define USB_DEVICE_ID_IBRIDGE_ALS 0x0302
+
+#endif
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 5ba0aa1d23353..6b5d565e73dc2 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -172,6 +172,7 @@
#define USB_DEVICE_ID_APPLE_IRCONTROL3 0x8241
#define USB_DEVICE_ID_APPLE_IRCONTROL4 0x8242
#define USB_DEVICE_ID_APPLE_IRCONTROL5 0x8243
+#define USB_DEVICE_ID_APPLE_IBRIDGE 0x8600
#define USB_VENDOR_ID_ASUS 0x0486
#define USB_DEVICE_ID_ASUS_T91MT 0x0185
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index d9ca874dffac3..731ddfd0e9efe 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -300,6 +300,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
#endif
+#if IS_ENABLED(CONFIG_HID_APPLE_IBRIDGE)
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IBRIDGE) },
+#endif
#if IS_ENABLED(CONFIG_HID_APPLEIR)
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
--
2.26.2
^ permalink raw reply related [flat|nested] 17+ messages in thread* [PATCH 5/5] HID: apple-touchbar - Add driver for the Touch Bar on MacBook Pro's.
2021-02-28 1:26 [PATCH 0/5] Touch Bar and ALS support for MacBook Pro's Ronald Tschalär
` (3 preceding siblings ...)
2021-02-28 1:26 ` [PATCH 4/5] HID: apple-ibridge: Add Apple iBridge HID driver for T1 chip Ronald Tschalär
@ 2021-02-28 1:26 ` Ronald Tschalär
2021-02-28 3:52 ` kernel test robot
` (2 more replies)
2021-02-28 14:38 ` [PATCH 0/5] Touch Bar and ALS support for " Jonathan Cameron
5 siblings, 3 replies; 17+ messages in thread
From: Ronald Tschalär @ 2021-02-28 1:26 UTC (permalink / raw)
To: Jiri Kosina, Benjamin Tissoires, Jonathan Cameron,
Srinivas Pandruvada, Lars-Peter Clausen, Peter Meerwald-Stadler
Cc: linux-kernel, linux-input, linux-iio
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 <ronald@innovation.ch>
---
drivers/hid/Kconfig | 10 +
drivers/hid/Makefile | 1 +
drivers/hid/apple-touchbar.c | 1523 ++++++++++++++++++++++++++++++++++
3 files changed, 1534 insertions(+)
create mode 100644 drivers/hid/apple-touchbar.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 579c45c3e36e5..1609a60d65cc3 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -141,6 +141,7 @@ config HID_APPLE_IBRIDGE
depends on ACPI
depends on USB_HID
depends on X86 || COMPILE_TEST
+ imply HID_APPLE_TOUCHBAR
imply HID_SENSOR_HUB
imply HID_SENSOR_ALS
help
@@ -152,6 +153,15 @@ config HID_APPLE_IBRIDGE
To compile this driver as a module, choose M here: the
module will be called apple-ibridge.
+config HID_APPLE_TOUCHBAR
+ tristate "Apple Touch Bar"
+ 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-touchbar.
+
config HID_APPLEIR
tristate "Apple infrared receiver"
depends on (USB_HID)
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index d29a3934bfaa9..b82a8256785da 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -27,6 +27,7 @@ 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) += apple-ibridge.o
+obj-$(CONFIG_HID_APPLE_TOUCHBAR) += apple-touchbar.o
obj-$(CONFIG_HID_APPLEIR) += hid-appleir.o
obj-$(CONFIG_HID_CREATIVE_SB0540) += hid-creative-sb0540.o
obj-$(CONFIG_HID_ASUS) += hid-asus.o
diff --git a/drivers/hid/apple-touchbar.c b/drivers/hid/apple-touchbar.c
new file mode 100644
index 0000000000000..87cb9ebafb615
--- /dev/null
+++ b/drivers/hid/apple-touchbar.c
@@ -0,0 +1,1523 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Apple Touch Bar Driver
+ *
+ * Copyright (c) 2017-2018 Ronald Tschalär
+ */
+
+/*
+ * Recent MacBookPro models (MacBookPro 13,[23] and later) 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 <linux/device.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/jiffies.h>
+#include <linux/ktime.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb.h>
+#include <linux/workqueue.h>
+
+#include "hid-ids.h"
+#include "apple-ibridge.h"
+
+#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 HID_USAGE_DISP_AUX1 (HID_UP_APPLE | 0x0020)
+
+#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_UPD 254
+#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_UPD 254
+#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_ESC 4
+#define APPLETB_FN_MODE_MAX APPLETB_FN_MODE_ESC
+
+#define APPLETB_DEVID_KEYBOARD 1
+#define APPLETB_DEVID_TOUCHPAD 2
+
+#define APPLETB_MAX_DIM_TIME 30
+
+#define APPLETB_FEATURE_IS_T1 BIT(0)
+
+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:\n"
+ " [>0] - turn touch bar display off after no keyboard, trackpad, or touch bar input has been received for this many seconds;\n"
+ " the display will be turned back on as soon as new input is received\n"
+ " 0 - turn touch bar display off (input does not turn it on again)\n"
+ " -1 - turn touch bar display on (does not turn off automatically)\n"
+ " -2 - disable touch bar completely");
+
+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:\n"
+ " >0 - dim touch bar display after no keyboard, trackpad, or touch bar input has been received for this many seconds\n"
+ " the display will be returned to full brightness as soon as new input is received\n"
+ " 0 - dim touch bar display (input does not return it to full brightness)\n"
+ " -1 - disable timeout (touch bar never dimmed)\n"
+ " [-2] - calculate 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:\n"
+ " 0 - function-keys only\n"
+ " [1] - fn key switches from special to function-keys\n"
+ " 2 - inverse of 1\n"
+ " 3 - special keys only\n"
+ " 4 - escape key 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 hid_field *mode_field;
+ struct hid_field *disp_field;
+ struct hid_field *disp_field_aux1;
+ struct appletb_iface_info {
+ struct hid_device *hdev;
+ struct usb_interface *usb_iface;
+ bool suspended;
+ } mode_iface, disp_iface;
+
+ 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;
+
+ bool is_t1;
+};
+
+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 appletb_device *appletb_dev;
+
+static int appletb_send_usb_ctrl(struct appletb_iface_info *iface_info,
+ __u8 requesttype, struct hid_report *report,
+ void *data, __u16 size)
+{
+ struct usb_device *dev = interface_to_usbdev(iface_info->usb_iface);
+ u8 ifnum = iface_info->usb_iface->cur_altsetting->desc.bInterfaceNumber;
+ int tries = 0;
+ int rc;
+
+ do {
+ rc = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ HID_REQ_SET_REPORT, requesttype,
+ (report->type + 1) << 8 | report->id,
+ ifnum, data, size, 2000);
+ if (rc != -EPIPE)
+ break;
+
+ usleep_range(1000 << tries, 3000 << tries);
+ } while (++tries < 5);
+
+ return (rc > 0) ? 0 : rc;
+}
+
+static bool appletb_disable_autopm(struct hid_device *hdev)
+{
+ int rc;
+
+ rc = hid_hw_power(hdev, PM_HINT_FULLON);
+
+ if (rc == 0)
+ return true;
+
+ hid_err(hdev,
+ "Failed to disable auto-pm on touch bar device (%d)\n", rc);
+ return false;
+}
+
+/*
+ * While the mode functionality is listed as a valid hid report in the usb
+ * interface descriptor, on a T1 it's not sent that way. Instead it's sent with
+ * different request-type and without a leading report-id in the data. Hence
+ * we need to send it as a custom usb control message rather via any of the
+ * standard hid_hw_*request() functions.
+ */
+static int appletb_set_tb_mode(struct appletb_device *tb_dev,
+ unsigned char mode)
+{
+ struct hid_report *report;
+ void *buf;
+ bool autopm_off = false;
+ int rc;
+
+ if (!tb_dev->mode_iface.hdev)
+ return -ENOTCONN;
+
+ report = tb_dev->mode_field->report;
+
+ if (tb_dev->is_t1) {
+ buf = kmemdup(&mode, 1, GFP_KERNEL);
+ } else {
+ char data[] = { report->id, mode };
+ buf = kmemdup(data, sizeof(data), GFP_KERNEL);
+ }
+ if (!buf)
+ return -ENOMEM;
+
+ autopm_off = appletb_disable_autopm(tb_dev->mode_iface.hdev);
+
+ if (tb_dev->is_t1)
+ rc = appletb_send_usb_ctrl(&tb_dev->mode_iface,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE,
+ report, buf, 1);
+ else
+ rc = appletb_send_usb_ctrl(&tb_dev->mode_iface,
+ USB_DIR_OUT | USB_TYPE_CLASS |
+ USB_RECIP_INTERFACE,
+ report, buf, 2);
+ if (rc < 0)
+ dev_err(tb_dev->log_dev,
+ "Failed to set touch bar mode to %u (%d)\n", mode, rc);
+
+ if (autopm_off)
+ hid_hw_power(tb_dev->mode_iface.hdev, PM_HINT_NORMAL);
+
+ kfree(buf);
+
+ return rc;
+}
+
+/*
+ * We don't use hid_hw_request() because that doesn't allow us to get the
+ * returned status from the usb-control request; we also don't use
+ * hid_hw_raw_request() because would mean duplicating the retry-on-EPIPE
+ * in our appletb_send_usb_ctrl().
+ */
+static int appletb_send_hid_report(struct appletb_iface_info *iface_info,
+ struct hid_report *report)
+{
+ unsigned char *buf;
+ int rc;
+
+ buf = hid_alloc_report_buf(report, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ hid_output_report(report, buf);
+
+ rc = appletb_send_usb_ctrl(iface_info,
+ USB_DIR_OUT | USB_TYPE_CLASS |
+ USB_RECIP_INTERFACE,
+ report, buf, hid_report_len(report));
+
+ kfree(buf);
+
+ return rc;
+}
+
+static int appletb_set_tb_disp(struct appletb_device *tb_dev,
+ unsigned char disp)
+{
+ struct hid_report *report;
+ int rc;
+
+ if (!tb_dev->disp_iface.hdev)
+ return -ENOTCONN;
+
+ report = tb_dev->disp_field->report;
+
+ rc = hid_set_field(tb_dev->disp_field_aux1, 0, 1);
+ if (rc) {
+ dev_err(tb_dev->log_dev,
+ "Failed to set display report field (%d)\n", rc);
+ return rc;
+ }
+
+ rc = hid_set_field(tb_dev->disp_field, 0, disp);
+ if (rc) {
+ dev_err(tb_dev->log_dev,
+ "Failed to set display report field (%d)\n", rc);
+ return rc;
+ }
+
+ /*
+ * Keep the USB interface powered on while the touch bar display is on
+ * for better responsiveness.
+ */
+ if (disp != APPLETB_CMD_DISP_OFF && !tb_dev->tb_autopm_off)
+ tb_dev->tb_autopm_off =
+ appletb_disable_autopm(report->device);
+
+ rc = appletb_send_hid_report(&tb_dev->disp_iface, 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->tb_autopm_off) {
+ hid_hw_power(tb_dev->disp_iface.hdev, PM_HINT_NORMAL);
+ tb_dev->tb_autopm_off = false;
+ }
+
+ return rc;
+}
+
+static bool appletb_any_tb_key_pressed(struct appletb_device *tb_dev)
+{
+ return !!memchr_inv(tb_dev->last_tb_keys_pressed, 0,
+ sizeof(tb_dev->last_tb_keys_pressed));
+}
+
+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 = 0, 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_field->report->device);
+
+ 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 == -2 || tb_dev->idle_timeout == 0)
+ min_timeout = -1;
+ else if (tb_dev->idle_timeout == -1)
+ min_timeout = tb_dev->dim_timeout;
+ else if (tb_dev->dim_timeout <= 0)
+ min_timeout = tb_dev->idle_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;
+ } else {
+ /* not used - just to appease the compiler */
+ time_to_off = 0;
+ }
+
+ any_tb_key_pressed = appletb_any_tb_key_pressed(tb_dev);
+
+ spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
+
+ dev_dbg(tb_dev->log_dev, "timeout calc: idle_timeout=%d dim_timeout=%d min_timeout=%lld time_left=%lld need_reschedule=%d any_tb_key_pressed=%d\n",
+ tb_dev->idle_timeout, tb_dev->dim_timeout, min_timeout,
+ time_left, need_reschedule, any_tb_key_pressed);
+
+ /* 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_ESC:
+ return APPLETB_CMD_MODE_ESC;
+
+ 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:
+ * -2 mode/disp off
+ * -1 mode on, disp on/dim
+ * 0 mode on, disp off
+ * >0 mode on, disp off after idle_timeout seconds
+ * dim_timeout (only valid if idle_timeout > 0 || idle_timeout == -1):
+ * -1 disp never dimmed
+ * 0 disp always dimmed
+ * >0 disp dim after dim_timeout seconds
+ */
+ if (tb_dev->idle_timeout == -2) {
+ 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->idle_timeout == 0 ? APPLETB_CMD_DISP_OFF :
+ 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) ||
+ 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->idle_timeout > 0)
+ tb_dev->dim_timeout = new - min(APPLETB_MAX_DIM_TIME, new / 3);
+ else if (tb_dev->dim_to_is_calc)
+ tb_dev->dim_timeout = -1;
+}
+
+static ssize_t idle_timeout_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct appletb_device *tb_dev = dev_get_drvdata(dev);
+
+ 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 = dev_get_drvdata(dev);
+ long new;
+ int rc;
+
+ rc = kstrtol(buf, 0, &new);
+ if (rc || new > INT_MAX || new < -2)
+ 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 = dev_get_drvdata(dev);
+
+ 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 = dev_get_drvdata(dev);
+ 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 = dev_get_drvdata(dev);
+
+ 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 = dev_get_drvdata(dev);
+ 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 = hid_get_drvdata(hdev);
+ unsigned int new_code = 0;
+ unsigned long flags;
+ bool send_dummy = false;
+ bool send_trnsl = false;
+ int slot;
+ int rc = 0;
+
+ 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);
+
+ if (value != 2)
+ tb_dev->last_tb_keys_pressed[slot] = value;
+
+ tb_dev->last_event_time = ktime_get();
+
+ 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 in that case.
+ */
+ 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;
+ }
+
+ if (type == EV_KEY && code == KEY_FN && value != 2)
+ tb_dev->last_fn_pressed = value;
+
+ tb_dev->last_event_time = ktime_get();
+
+ 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;
+
+ while (dev && !(dev->type && dev->type->name &&
+ !strcmp(dev->type->name, "usb_interface")))
+ dev = dev->parent;
+
+ return dev ? to_usb_interface(dev) : NULL;
+}
+
+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 struct appletb_iface_info *
+appletb_get_iface_info(struct appletb_device *tb_dev, struct hid_device *hdev)
+{
+ if (hdev == tb_dev->mode_iface.hdev)
+ return &tb_dev->mode_iface;
+ if (hdev == tb_dev->disp_iface.hdev)
+ return &tb_dev->disp_iface;
+ return NULL;
+}
+
+/**
+ * appletb_find_report_field() - 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
+ *
+ * Returns: the hid field if found, or NULL if none found.
+ */
+static struct hid_field *appletb_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;
+}
+
+/**
+ * appletb_find_hid_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
+ *
+ * Returns: the hid field if found, or NULL if none found.
+ */
+static struct hid_field *appletb_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 = appletb_find_report_field(report, field_usage);
+ if (field)
+ return field;
+ }
+ }
+
+ return NULL;
+}
+
+static int appletb_extract_report_and_iface_info(struct appletb_device *tb_dev,
+ struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ struct appletb_iface_info *iface_info;
+ struct usb_interface *usb_iface;
+ struct hid_field *field;
+
+ field = appletb_find_hid_field(hdev, HID_GD_KEYBOARD, HID_USAGE_MODE);
+ if (field) {
+ iface_info = &tb_dev->mode_iface;
+ tb_dev->mode_field = field;
+ tb_dev->is_t1 = !!(id->driver_data & APPLETB_FEATURE_IS_T1);
+ } else {
+ field = appletb_find_hid_field(hdev, HID_USAGE_APPLE_APP,
+ HID_USAGE_DISP);
+ if (!field)
+ return 0;
+
+ iface_info = &tb_dev->disp_iface;
+ tb_dev->disp_field = field;
+ tb_dev->disp_field_aux1 =
+ appletb_find_hid_field(hdev, HID_USAGE_APPLE_APP,
+ HID_USAGE_DISP_AUX1);
+
+ if (!tb_dev->disp_field_aux1 ||
+ tb_dev->disp_field_aux1->report !=
+ tb_dev->disp_field->report) {
+ dev_err(tb_dev->log_dev,
+ "Unexpected report structure for report %u in device %s\n",
+ tb_dev->disp_field->report->id,
+ dev_name(&hdev->dev));
+ return -ENODEV;
+ }
+ }
+
+ 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;
+ }
+
+ iface_info->hdev = hdev;
+ iface_info->usb_iface = usb_get_intf(usb_iface);
+ iface_info->suspended = false;
+
+ return 1;
+}
+
+static void appletb_clear_iface_info(struct appletb_device *tb_dev,
+ struct hid_device *hdev)
+{
+ struct appletb_iface_info *iface_info;
+
+ iface_info = appletb_get_iface_info(tb_dev, hdev);
+ if (iface_info) {
+ usb_put_intf(iface_info->usb_iface);
+ iface_info->usb_iface = NULL;
+ iface_info->hdev = NULL;
+ }
+}
+
+static bool appletb_test_and_mark_active(struct appletb_device *tb_dev)
+{
+ unsigned long flags;
+ bool activated = false;
+
+ spin_lock_irqsave(&tb_dev->tb_lock, flags);
+
+ if (tb_dev->mode_iface.hdev && tb_dev->disp_iface.hdev &&
+ !tb_dev->active) {
+ tb_dev->active = true;
+ activated = true;
+ }
+
+ spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
+
+ return activated;
+}
+
+static bool appletb_test_and_mark_inactive(struct appletb_device *tb_dev,
+ struct hid_device *hdev)
+{
+ unsigned long flags;
+ bool deactivated = false;
+
+ spin_lock_irqsave(&tb_dev->tb_lock, flags);
+
+ if (tb_dev->mode_iface.hdev && tb_dev->disp_iface.hdev &&
+ tb_dev->active &&
+ (hdev == tb_dev->mode_iface.hdev ||
+ hdev == tb_dev->disp_iface.hdev)) {
+ tb_dev->active = false;
+ deactivated = true;
+ }
+
+ spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
+
+ return deactivated;
+}
+
+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 SPI 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 SPI touchpad device */
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_BUS |
+ INPUT_DEVICE_ID_MATCH_VENDOR |
+ INPUT_DEVICE_ID_MATCH_KEYBIT,
+ .bustype = BUS_USB,
+ .vendor = 0x05ac /* USB_VENDOR_ID_APPLE */,
+ .keybit = { [BIT_WORD(KEY_FN)] = BIT_MASK(KEY_FN) },
+ .driver_info = APPLETB_DEVID_KEYBOARD,
+ }, /* Builtin USB keyboard device */
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_BUS |
+ INPUT_DEVICE_ID_MATCH_VENDOR |
+ INPUT_DEVICE_ID_MATCH_KEYBIT,
+ .bustype = BUS_USB,
+ .vendor = 0x05ac /* USB_VENDOR_ID_APPLE */,
+ .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
+ .driver_info = APPLETB_DEVID_TOUCHPAD,
+ }, /* Builtin USB touchpad device */
+ { }, /* Terminating zero entry */
+};
+
+static bool appletb_match_internal_device(struct input_handler *handler,
+ struct input_dev *inp_dev)
+{
+ struct device *dev = &inp_dev->dev;
+
+ if (inp_dev->id.bustype == BUS_SPI)
+ return true;
+
+ /* in kernel: dev && !is_usb_device(dev) */
+ while (dev && !(dev->type && dev->type->name &&
+ !strcmp(dev->type->name, "usb_device")))
+ dev = dev->parent;
+
+ /*
+ * Apple labels all their internal keyboards and trackpads as such,
+ * instead of maintaining an ever expanding list of product-id's we
+ * just look at the device's product name.
+ */
+ if (dev)
+ return !!strstr(to_usb_device(dev)->product, "Internal Keyboard");
+
+ return false;
+}
+
+static int appletb_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ struct appletb_device *tb_dev = appletb_dev;
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(&tb_dev->tb_lock, flags);
+
+ if (!tb_dev->log_dev)
+ tb_dev->log_dev = &hdev->dev;
+
+ spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
+
+ hid_set_drvdata(hdev, tb_dev);
+
+ /* initialize the report info */
+ rc = hid_parse(hdev);
+ if (rc) {
+ dev_err(tb_dev->log_dev, "als: hid parse failed (%d)\n", rc);
+ goto error;
+ }
+
+ rc = appletb_extract_report_and_iface_info(tb_dev, hdev, id);
+ if (rc < 0)
+ goto error;
+
+ rc = hid_hw_start(hdev, HID_CONNECT_DRIVER | HID_CONNECT_HIDINPUT);
+ if (rc) {
+ dev_err(tb_dev->log_dev, "hw start failed (%d)\n", rc);
+ goto clear_iface_info;
+ }
+
+ rc = hid_hw_open(hdev);
+ if (rc) {
+ dev_err(tb_dev->log_dev, "hw open failed (%d)\n", rc);
+ goto stop_hid;
+ }
+
+ /* do setup if we have both interfaces */
+ if (appletb_test_and_mark_active(tb_dev)) {
+ /* 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->pnd_tb_mode = APPLETB_CMD_MODE_UPD;
+ tb_dev->pnd_tb_disp = APPLETB_CMD_DISP_UPD;
+
+ 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.match = appletb_match_internal_device;
+ 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_iface.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_dbg(tb_dev->log_dev, "Touchbar activated\n");
+ }
+
+ return 0;
+
+unreg_handler:
+ input_unregister_handler(&tb_dev->inp_handler);
+mark_inactive:
+ appletb_test_and_mark_inactive(tb_dev, hdev);
+ cancel_delayed_work_sync(&tb_dev->tb_work);
+ hid_hw_close(hdev);
+stop_hid:
+ hid_hw_stop(hdev);
+clear_iface_info:
+ appletb_clear_iface_info(tb_dev, hdev);
+error:
+ return rc;
+}
+
+static void appletb_remove(struct hid_device *hdev)
+{
+ struct appletb_device *tb_dev = hid_get_drvdata(hdev);
+ unsigned long flags;
+
+ if (appletb_test_and_mark_inactive(tb_dev, hdev)) {
+ sysfs_remove_group(&tb_dev->mode_iface.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)
+ hid_hw_power(tb_dev->disp_iface.hdev, PM_HINT_NORMAL);
+
+ dev_info(tb_dev->log_dev, "Touchbar deactivated\n");
+ }
+
+ hid_hw_close(hdev);
+ hid_hw_stop(hdev);
+ appletb_clear_iface_info(tb_dev, hdev);
+
+ spin_lock_irqsave(&tb_dev->tb_lock, flags);
+
+ if (tb_dev->log_dev == &hdev->dev) {
+ if (tb_dev->mode_iface.hdev)
+ tb_dev->log_dev = &tb_dev->mode_iface.hdev->dev;
+ else if (tb_dev->disp_iface.hdev)
+ tb_dev->log_dev = &tb_dev->disp_iface.hdev->dev;
+ else
+ tb_dev->log_dev = NULL;
+ }
+
+ spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
+}
+
+#ifdef CONFIG_PM
+static int appletb_suspend(struct hid_device *hdev, pm_message_t message)
+{
+ struct appletb_device *tb_dev = hid_get_drvdata(hdev);
+ struct appletb_iface_info *iface_info;
+ 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_iface.suspended && !tb_dev->disp_iface.suspended) {
+ tb_dev->active = false;
+ cancel_delayed_work(&tb_dev->tb_work);
+ }
+
+ iface_info = appletb_get_iface_info(tb_dev, hdev);
+ if (iface_info)
+ iface_info->suspended = true;
+
+ if ((!tb_dev->mode_iface.hdev || tb_dev->mode_iface.suspended) &&
+ (!tb_dev->disp_iface.hdev || tb_dev->disp_iface.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 = hid_get_drvdata(hdev);
+ struct appletb_iface_info *iface_info;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tb_dev->tb_lock, flags);
+
+ iface_info = appletb_get_iface_info(tb_dev, hdev);
+ if (iface_info)
+ iface_info->suspended = false;
+
+ if ((tb_dev->mode_iface.hdev && !tb_dev->mode_iface.suspended) &&
+ (tb_dev->disp_iface.hdev && !tb_dev->disp_iface.suspended)) {
+ /*
+ * Restore touch bar state. Note that autopm state is not
+ * preserved, so need explicitly restore that here.
+ */
+ 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(void)
+{
+ struct appletb_device *tb_dev;
+
+ tb_dev = kzalloc(sizeof(*tb_dev), GFP_KERNEL);
+ if (!tb_dev)
+ return NULL;
+
+ spin_lock_init(&tb_dev->tb_lock);
+ INIT_DELAYED_WORK(&tb_dev->tb_work, appletb_set_tb_worker);
+
+ 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 const struct hid_device_id appletb_hid_ids[] = {
+ /* MacBook Pro's 2016, 2017, with T1 chip */
+ { HID_USB_DEVICE(USB_VENDOR_ID_LINUX_FOUNDATION,
+ USB_DEVICE_ID_IBRIDGE_TB),
+ .driver_data = APPLETB_FEATURE_IS_T1 },
+ /* MacBook Pro's 2018, 2019, with T2 chip: iBridge DFR brightness */
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 0x8102) },
+ /* MacBook Pro's 2018, 2019, with T2 chip: iBridge Display */
+ { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 0x8302) },
+ { },
+};
+
+MODULE_DEVICE_TABLE(hid, appletb_hid_ids);
+
+static struct hid_driver appletb_hid_driver = {
+ .name = "apple-touchbar",
+ .id_table = appletb_hid_ids,
+ .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 __init appletb_init(void)
+{
+ struct appletb_device *tb_dev;
+ int rc;
+
+ tb_dev = appletb_alloc_device();
+ if (!tb_dev)
+ return -ENOMEM;
+
+ appletb_dev = tb_dev;
+
+ rc = hid_register_driver(&appletb_hid_driver);
+ if (rc)
+ goto error;
+
+ return 0;
+
+error:
+ appletb_free_device(tb_dev);
+ return rc;
+}
+
+static void __exit appletb_exit(void)
+{
+ hid_unregister_driver(&appletb_hid_driver);
+ appletb_free_device(appletb_dev);
+}
+
+module_init(appletb_init);
+module_exit(appletb_exit);
+
+MODULE_AUTHOR("Ronald Tschalär");
+MODULE_DESCRIPTION("MacBookPro Touch Bar driver");
+MODULE_LICENSE("GPL v2");
--
2.26.2
^ permalink raw reply related [flat|nested] 17+ messages in thread