From bebf8820b355e6ac00487f3f36440d502eb4a44c Mon Sep 17 00:00:00 2001 From: Thomas Weißschuh Date: Tue, 20 Jul 2021 22:27:08 +0200 Subject: HID: cmedia: add support for HS-100B mute button MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit These chips report mute button events in bit 4 of their report without it being part of the report descriptor. Use a custom descriptor that maps this bit. Signed-off-by: Thomas Weißschuh Signed-off-by: Jiri Kosina --- drivers/hid/Kconfig | 5 +-- drivers/hid/hid-cmedia.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++-- drivers/hid/hid-ids.h | 1 + 3 files changed, 92 insertions(+), 4 deletions(-) (limited to 'drivers/hid') diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 160554903ef9..6f72ecd79db0 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -259,10 +259,11 @@ config HID_PRODIKEYS and some additional multimedia keys. config HID_CMEDIA - tristate "CMedia CM6533 HID audio jack controls" + tristate "CMedia audio chips" depends on HID help - Support for CMedia CM6533 HID audio jack controls. + Support for CMedia CM6533 HID audio jack controls + and HS100B mute buttons. config HID_CP2112 tristate "Silicon Labs CP2112 HID USB-to-SMBus Bridge support" diff --git a/drivers/hid/hid-cmedia.c b/drivers/hid/hid-cmedia.c index 3296c5050264..cab42047bc99 100644 --- a/drivers/hid/hid-cmedia.c +++ b/drivers/hid/hid-cmedia.c @@ -1,8 +1,10 @@ // SPDX-License-Identifier: GPL-2.0-only /* * HID driver for CMedia CM6533 audio jack controls + * and HS100B mute buttons * * Copyright (C) 2015 Ben Chen + * Copyright (C) 2021 Thomas Weißschuh */ #include @@ -11,13 +13,53 @@ #include "hid-ids.h" MODULE_AUTHOR("Ben Chen"); -MODULE_DESCRIPTION("CM6533 HID jack controls"); +MODULE_AUTHOR("Thomas Weißschuh"); +MODULE_DESCRIPTION("CM6533 HID jack controls and HS100B mute button"); MODULE_LICENSE("GPL"); #define CM6533_JD_TYPE_COUNT 1 #define CM6533_JD_RAWEV_LEN 16 #define CM6533_JD_SFX_OFFSET 8 +#define HS100B_RDESC_ORIG_SIZE 60 + +/* Fixed report descriptor of HS-100B audio chip + * Bit 4 is an abolute Microphone mute usage instead of being unassigned. + */ +static __u8 hs100b_rdesc_fixed[] = { + 0x05, 0x0C, /* Usage Page (Consumer), */ + 0x09, 0x01, /* Usage (Consumer Control), */ + 0xA1, 0x01, /* Collection (Application), */ + 0x15, 0x00, /* Logical Minimum (0), */ + 0x25, 0x01, /* Logical Maximum (1), */ + 0x09, 0xE9, /* Usage (Volume Inc), */ + 0x09, 0xEA, /* Usage (Volume Dec), */ + 0x75, 0x01, /* Report Size (1), */ + 0x95, 0x02, /* Report Count (2), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0xE2, /* Usage (Mute), */ + 0x95, 0x01, /* Report Count (1), */ + 0x81, 0x06, /* Input (Variable, Relative), */ + 0x05, 0x0B, /* Usage Page (Telephony), */ + 0x09, 0x2F, /* Usage (2Fh), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0x20, /* Usage (20h), */ + 0x81, 0x06, /* Input (Variable, Relative), */ + 0x05, 0x0C, /* Usage Page (Consumer), */ + 0x09, 0x00, /* Usage (00h), */ + 0x95, 0x03, /* Report Count (3), */ + 0x81, 0x02, /* Input (Variable), */ + 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ + 0x09, 0x00, /* Usage (00h), */ + 0x75, 0x08, /* Report Size (8), */ + 0x95, 0x03, /* Report Count (3), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0x00, /* Usage (00h), */ + 0x95, 0x04, /* Report Count (4), */ + 0x91, 0x02, /* Output (Variable), */ + 0xC0 /* End Collection */ +}; + /* * *CM6533 audio jack HID raw events: @@ -156,5 +198,49 @@ static struct hid_driver cmhid_driver = { .remove = cmhid_remove, .input_mapping = cmhid_input_mapping, }; -module_hid_driver(cmhid_driver); +static __u8 *cmhid_hs100b_report_fixup(struct hid_device *hid, __u8 *rdesc, + unsigned int *rsize) +{ + if (*rsize == HS100B_RDESC_ORIG_SIZE) { + hid_info(hid, "Fixing CMedia HS-100B report descriptor\n"); + rdesc = hs100b_rdesc_fixed; + *rsize = sizeof(hs100b_rdesc_fixed); + } + return rdesc; +} + +static const struct hid_device_id cmhid_hs100b_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CMEDIA_HS100B) }, + { } +}; +MODULE_DEVICE_TABLE(hid, cmhid_hs100b_devices); + +static struct hid_driver cmhid_hs100b_driver = { + .name = "cmedia_hs100b", + .id_table = cmhid_hs100b_devices, + .report_fixup = cmhid_hs100b_report_fixup, +}; + +static int cmedia_init(void) +{ + int ret; + + ret = hid_register_driver(&cmhid_driver); + if (ret) + return ret; + + ret = hid_register_driver(&cmhid_hs100b_driver); + if (ret) + hid_unregister_driver(&cmhid_driver); + + return ret; +} +module_init(cmedia_init); + +static void cmedia_exit(void) +{ + hid_unregister_driver(&cmhid_driver); + hid_unregister_driver(&cmhid_hs100b_driver); +} +module_exit(cmedia_exit); diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 8f1893e68112..6864e4e6ac8b 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -292,6 +292,7 @@ #define USB_VENDOR_ID_CMEDIA 0x0d8c #define USB_DEVICE_ID_CM109 0x000e +#define USB_DEVICE_ID_CMEDIA_HS100B 0x0014 #define USB_DEVICE_ID_CM6533 0x0022 #define USB_VENDOR_ID_CODEMERCS 0x07c0 -- cgit v1.2.3