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Subject[PATCH 4.9 094/152] HID: asus: Add i2c touchpad support
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Brendan McGrath <redmcg@redmandi.dyndns.org>

[ Upstream commit 9ce12d8be12c94334634dd57050444910415e45f ]

Update the hid-asus module to add multitouch support for the Asus i2c touchpad.

This patch aims to resolve the issue raised here:
https://bugzilla.kernel.org/show_bug.cgi?id=120181

The issue is in relation to an Asus touchpad device which currently does not
have multitouch support.

The device currently falls through to the hid-generic driver which
treats the device as a mouse.

This patch aims to add the multitouch support.

[jkosina@suse.cz: move most of the 'patch comment' into actual changelog]
[jkosina@suse.cz: drop hunk that changes ->name of the driver]
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Brendan McGrath <redmcg@redmandi.dyndns.org>
Signed-off-by: Victor Vlasenko <victor.vlasenko@sysgears.com>
Signed-off-by: Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/Kconfig | 2
drivers/hid/hid-asus.c | 299 ++++++++++++++++++++++++++++++++++++++++++++++++-
drivers/hid/hid-core.c | 1
drivers/hid/hid-ids.h | 1
4 files changed, 296 insertions(+), 7 deletions(-)

--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -138,7 +138,7 @@ config HID_ASUS
tristate "Asus"
depends on I2C_HID
---help---
- Support for Asus notebook built-in keyboard via i2c.
+ Support for Asus notebook built-in keyboard and touchpad via i2c.

Supported devices:
- EeeBook X205TA
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -11,6 +11,12 @@
* This module based on hid-ortek by
* Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
* Copyright (c) 2011 Jiri Kosina
+ *
+ * This module has been updated to add support for Asus i2c touchpad.
+ *
+ * Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
+ * Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
+ * Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
*/

/*
@@ -20,16 +26,287 @@
* any later version.
*/

-#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
+#include <linux/input/mt.h>

#include "hid-ids.h"

+MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
+MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
+MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
+MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
+MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
+
+#define FEATURE_REPORT_ID 0x0d
+#define INPUT_REPORT_ID 0x5d
+
+#define INPUT_REPORT_SIZE 28
+
+#define MAX_CONTACTS 5
+
+#define MAX_X 2794
+#define MAX_Y 1758
+#define MAX_TOUCH_MAJOR 8
+#define MAX_PRESSURE 128
+
+#define CONTACT_DATA_SIZE 5
+
+#define BTN_LEFT_MASK 0x01
+#define CONTACT_TOOL_TYPE_MASK 0x80
+#define CONTACT_X_MSB_MASK 0xf0
+#define CONTACT_Y_MSB_MASK 0x0f
+#define CONTACT_TOUCH_MAJOR_MASK 0x07
+#define CONTACT_PRESSURE_MASK 0x7f
+
+#define QUIRK_FIX_NOTEBOOK_REPORT BIT(0)
+#define QUIRK_NO_INIT_REPORTS BIT(1)
+#define QUIRK_SKIP_INPUT_MAPPING BIT(2)
+#define QUIRK_IS_MULTITOUCH BIT(3)
+
+#define NOTEBOOK_QUIRKS QUIRK_FIX_NOTEBOOK_REPORT
+#define TOUCHPAD_QUIRKS (QUIRK_NO_INIT_REPORTS | \
+ QUIRK_SKIP_INPUT_MAPPING | \
+ QUIRK_IS_MULTITOUCH)
+
+#define TRKID_SGN ((TRKID_MAX + 1) >> 1)
+
+struct asus_drvdata {
+ unsigned long quirks;
+ struct input_dev *input;
+};
+
+static void asus_report_contact_down(struct input_dev *input,
+ int toolType, u8 *data)
+{
+ int touch_major, pressure;
+ int x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
+ int y = MAX_Y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
+
+ if (toolType == MT_TOOL_PALM) {
+ touch_major = MAX_TOUCH_MAJOR;
+ pressure = MAX_PRESSURE;
+ } else {
+ touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
+ pressure = data[4] & CONTACT_PRESSURE_MASK;
+ }
+
+ input_report_abs(input, ABS_MT_POSITION_X, x);
+ input_report_abs(input, ABS_MT_POSITION_Y, y);
+ input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
+ input_report_abs(input, ABS_MT_PRESSURE, pressure);
+}
+
+/* Required for Synaptics Palm Detection */
+static void asus_report_tool_width(struct input_dev *input)
+{
+ struct input_mt *mt = input->mt;
+ struct input_mt_slot *oldest;
+ int oldid, count, i;
+
+ oldest = NULL;
+ oldid = mt->trkid;
+ count = 0;
+
+ for (i = 0; i < mt->num_slots; ++i) {
+ struct input_mt_slot *ps = &mt->slots[i];
+ int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
+
+ if (id < 0)
+ continue;
+ if ((id - oldid) & TRKID_SGN) {
+ oldest = ps;
+ oldid = id;
+ }
+ count++;
+ }
+
+ if (oldest) {
+ input_report_abs(input, ABS_TOOL_WIDTH,
+ input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
+ }
+}
+
+static void asus_report_input(struct input_dev *input, u8 *data)
+{
+ int i;
+ u8 *contactData = data + 2;
+
+ for (i = 0; i < MAX_CONTACTS; i++) {
+ bool down = !!(data[1] & BIT(i+3));
+ int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
+ MT_TOOL_PALM : MT_TOOL_FINGER;
+
+ input_mt_slot(input, i);
+ input_mt_report_slot_state(input, toolType, down);
+
+ if (down) {
+ asus_report_contact_down(input, toolType, contactData);
+ contactData += CONTACT_DATA_SIZE;
+ }
+ }
+
+ input_report_key(input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
+ asus_report_tool_width(input);
+
+ input_mt_sync_frame(input);
+ input_sync(input);
+}
+
+static int asus_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
+{
+ struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & QUIRK_IS_MULTITOUCH &&
+ data[0] == INPUT_REPORT_ID &&
+ size == INPUT_REPORT_SIZE) {
+ asus_report_input(drvdata->input, data);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
+{
+ struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
+ int ret;
+ struct input_dev *input = hi->input;
+
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, MAX_X, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, MAX_Y, 0, 0);
+ input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
+ input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);
+
+ __set_bit(BTN_LEFT, input->keybit);
+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+
+ ret = input_mt_init_slots(input, MAX_CONTACTS, INPUT_MT_POINTER);
+
+ if (ret) {
+ hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
+ return ret;
+ }
+
+ drvdata->input = input;
+ }
+
+ return 0;
+}
+
+static int asus_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit,
+ int *max)
+{
+ struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
+ /* Don't map anything from the HID report.
+ * We do it all manually in asus_input_configured
+ */
+ return -1;
+ }
+
+ return 0;
+}
+
+static int asus_start_multitouch(struct hid_device *hdev)
+{
+ int ret;
+ const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
+ unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
+
+ if (!dmabuf) {
+ ret = -ENOMEM;
+ hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
+ return ret;
+ }
+
+ ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
+ HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+ kfree(dmabuf);
+
+ if (ret != sizeof(buf)) {
+ hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
+{
+ struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
+ return asus_start_multitouch(hdev);
+
+ return 0;
+}
+
+static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+ struct asus_drvdata *drvdata;
+
+ drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
+ if (drvdata == NULL) {
+ hid_err(hdev, "Can't alloc Asus descriptor\n");
+ return -ENOMEM;
+ }
+
+ hid_set_drvdata(hdev, drvdata);
+
+ drvdata->quirks = id->driver_data;
+
+ if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
+ hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "Asus hid parse failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ hid_err(hdev, "Asus hw start failed: %d\n", ret);
+ return ret;
+ }
+
+ if (!drvdata->input) {
+ hid_err(hdev, "Asus input not registered\n");
+ ret = -ENOMEM;
+ goto err_stop_hw;
+ }
+
+ drvdata->input->name = "Asus TouchPad";
+
+ if (drvdata->quirks & QUIRK_IS_MULTITOUCH) {
+ ret = asus_start_multitouch(hdev);
+ if (ret)
+ goto err_stop_hw;
+ }
+
+ return 0;
+err_stop_hw:
+ hid_hw_stop(hdev);
+ return ret;
+}
+
static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
- if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
+ struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
+ *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
rdesc[55] = 0xdd;
}
@@ -37,15 +314,25 @@ static __u8 *asus_report_fixup(struct hi
}

static const struct hid_device_id asus_devices[] = {
- { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_NOTEBOOK_KEYBOARD) },
+ { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
+ USB_DEVICE_ID_ASUSTEK_NOTEBOOK_KEYBOARD), NOTEBOOK_QUIRKS},
+ { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
+ USB_DEVICE_ID_ASUSTEK_TOUCHPAD), TOUCHPAD_QUIRKS },
{ }
};
MODULE_DEVICE_TABLE(hid, asus_devices);

static struct hid_driver asus_driver = {
- .name = "asus",
- .id_table = asus_devices,
- .report_fixup = asus_report_fixup
+ .name = "asus",
+ .id_table = asus_devices,
+ .report_fixup = asus_report_fixup,
+ .probe = asus_probe,
+ .input_mapping = asus_input_mapping,
+ .input_configured = asus_input_configured,
+#ifdef CONFIG_PM
+ .reset_resume = asus_reset_resume,
+#endif
+ .raw_event = asus_raw_event
};
module_hid_driver(asus_driver);

--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1856,6 +1856,7 @@ static const struct hid_device_id hid_ha
{ 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) },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_NOTEBOOK_KEYBOARD) },
+ { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_TOUCHPAD) },
{ HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -174,6 +174,7 @@
#define USB_DEVICE_ID_ASUSTEK_LCM 0x1726
#define USB_DEVICE_ID_ASUSTEK_LCM2 0x175b
#define USB_DEVICE_ID_ASUSTEK_NOTEBOOK_KEYBOARD 0x8585
+#define USB_DEVICE_ID_ASUSTEK_TOUCHPAD 0x0101

#define USB_VENDOR_ID_ATEN 0x0557
#define USB_DEVICE_ID_ATEN_UC100KM 0x2004

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