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From 98f07385212073536f303c07ece455acdd4d267f Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=D0=9D=D0=B8=D0=BA=D0=BE=D0=BB=D0=B0=D0=B9=20=D0=9A=D1=83?=
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=?UTF-8?q?=D0=B4=D1=80=D1=8F=D0=B2=D1=86=D0=B5=D0=B2?=
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<nkudriavtsev@gmail.com>
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Date: Tue, 21 Jul 2015 13:31:52 +0300
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Subject: [PATCH] HID: chicony: Add support for Acer Aspire Switch 12
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Acer Aspire Switch 12 keyboard Chicony's controller reports too big usage
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index on the 1st interface. The patch fixes the report. The work based on
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solution from drivers/hid/hid-holtek-mouse.c
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Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=101721
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Signed-off-by: Nicholas Kudriavtsev <nkudriavtsev@gmail.com>
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Signed-off-by: Jiri Kosina <jkosina@suse.com>
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---
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drivers/hid/hid-chicony.c | 26 ++++++++++++++++++++++++++
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drivers/hid/hid-core.c | 1 +
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drivers/hid/hid-ids.h | 1 +
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3 files changed, 28 insertions(+)
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diff --git a/drivers/hid/hid-chicony.c b/drivers/hid/hid-chicony.c
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index b613d5a79684..bc3cec199fee 100644
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--- a/drivers/hid/hid-chicony.c
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+++ b/drivers/hid/hid-chicony.c
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@@ -20,6 +20,7 @@
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#include <linux/input.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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+#include <linux/usb.h>
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#include "hid-ids.h"
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@@ -57,10 +58,34 @@ static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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return 1;
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}
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+static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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+ unsigned int *rsize)
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+{
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+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
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+
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+ if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
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+ /* Change usage maximum and logical maximum from 0x7fff to
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+ * 0x2fff, so they don't exceed HID_MAX_USAGES */
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+ switch (hdev->product) {
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+ case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
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+ if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
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+ && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
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+ hid_info(hdev, "Fixing up report descriptor\n");
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+ rdesc[65] = rdesc[70] = 0x2f;
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+ }
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+ break;
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+ }
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+
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+ }
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+ return rdesc;
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+}
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+
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+
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static const struct hid_device_id ch_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
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+ { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, ch_devices);
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@@ -68,6 +93,7 @@ MODULE_DEVICE_TABLE(hid, ch_devices);
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static struct hid_driver ch_driver = {
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.name = "chicony",
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.id_table = ch_devices,
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+ .report_fixup = ch_switch12_report_fixup,
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.input_mapping = ch_input_mapping,
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};
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module_hid_driver(ch_driver);
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diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
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index e6fce23b121a..f90ca6574221 100644
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--- a/drivers/hid/hid-core.c
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+++ b/drivers/hid/hid-core.c
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@@ -1807,6 +1807,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
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+ { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_CP2112) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
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diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
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index b3b225b75d0a..79210ca8eff1 100644
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--- a/drivers/hid/hid-ids.h
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+++ b/drivers/hid/hid-ids.h
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@@ -233,6 +233,7 @@
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#define USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE 0x1053
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#define USB_DEVICE_ID_CHICONY_WIRELESS2 0x1123
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#define USB_DEVICE_ID_CHICONY_AK1D 0x1125
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+#define USB_DEVICE_ID_CHICONY_ACER_SWITCH12 0x1421
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#define USB_VENDOR_ID_CHUNGHWAT 0x2247
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#define USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH 0x0001
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--
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2.4.3
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