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Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* HID driver for CMedia CM6533 audio jack controls
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*
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* Copyright (C) 2015 Ben Chen <ben_chen@bizlinktech.com>
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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MODULE_AUTHOR("Ben Chen");
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MODULE_DESCRIPTION("CM6533 HID jack controls");
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MODULE_LICENSE("GPL");
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#define CM6533_JD_TYPE_COUNT 1
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#define CM6533_JD_RAWEV_LEN 16
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#define CM6533_JD_SFX_OFFSET 8
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/*
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*
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*CM6533 audio jack HID raw events:
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*
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*Plug in:
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*01000600 002083xx 080008c0 10000000
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*about 3 seconds later...
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*01000a00 002083xx 08000380 10000000
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*01000600 002083xx 08000380 10000000
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*
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*Plug out:
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*01000400 002083xx 080008c0 x0000000
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*/
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static const u8 ji_sfx[] = { 0x08, 0x00, 0x08, 0xc0 };
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static const u8 ji_in[] = { 0x01, 0x00, 0x06, 0x00 };
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static const u8 ji_out[] = { 0x01, 0x00, 0x04, 0x00 };
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static int jack_switch_types[CM6533_JD_TYPE_COUNT] = {
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SW_HEADPHONE_INSERT,
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};
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struct cmhid {
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struct input_dev *input_dev;
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struct hid_device *hid;
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unsigned short switch_map[CM6533_JD_TYPE_COUNT];
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};
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static void hp_ev(struct hid_device *hid, struct cmhid *cm, int value)
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{
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input_report_switch(cm->input_dev, SW_HEADPHONE_INSERT, value);
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input_sync(cm->input_dev);
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}
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static int cmhid_raw_event(struct hid_device *hid, struct hid_report *report,
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u8 *data, int len)
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{
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struct cmhid *cm = hid_get_drvdata(hid);
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if (len != CM6533_JD_RAWEV_LEN)
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goto out;
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if (memcmp(data+CM6533_JD_SFX_OFFSET, ji_sfx, sizeof(ji_sfx)))
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goto out;
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if (!memcmp(data, ji_out, sizeof(ji_out))) {
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hp_ev(hid, cm, 0);
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goto out;
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}
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if (!memcmp(data, ji_in, sizeof(ji_in))) {
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hp_ev(hid, cm, 1);
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goto out;
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}
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out:
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return 0;
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}
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static int cmhid_input_configured(struct hid_device *hid,
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struct hid_input *hidinput)
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{
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struct input_dev *input_dev = hidinput->input;
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struct cmhid *cm = hid_get_drvdata(hid);
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int i;
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cm->input_dev = input_dev;
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memcpy(cm->switch_map, jack_switch_types, sizeof(cm->switch_map));
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input_dev->evbit[0] = BIT(EV_SW);
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for (i = 0; i < CM6533_JD_TYPE_COUNT; i++)
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input_set_capability(cm->input_dev,
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EV_SW, jack_switch_types[i]);
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return 0;
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}
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static int cmhid_input_mapping(struct hid_device *hid,
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struct hid_input *hi, struct hid_field *field,
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struct hid_usage *usage, unsigned long **bit, int *max)
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{
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return -1;
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}
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static int cmhid_probe(struct hid_device *hid, const struct hid_device_id *id)
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{
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int ret;
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struct cmhid *cm;
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cm = kzalloc(sizeof(struct cmhid), GFP_KERNEL);
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if (!cm) {
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ret = -ENOMEM;
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goto allocfail;
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}
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cm->hid = hid;
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hid->quirks |= HID_QUIRK_HIDINPUT_FORCE;
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hid_set_drvdata(hid, cm);
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ret = hid_parse(hid);
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if (ret) {
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hid_err(hid, "parse failed\n");
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goto fail;
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}
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ret = hid_hw_start(hid, HID_CONNECT_DEFAULT | HID_CONNECT_HIDDEV_FORCE);
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if (ret) {
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hid_err(hid, "hw start failed\n");
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goto fail;
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}
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return 0;
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fail:
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kfree(cm);
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allocfail:
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return ret;
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}
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static void cmhid_remove(struct hid_device *hid)
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{
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struct cmhid *cm = hid_get_drvdata(hid);
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hid_hw_stop(hid);
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kfree(cm);
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}
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static const struct hid_device_id cmhid_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM6533) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, cmhid_devices);
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static struct hid_driver cmhid_driver = {
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.name = "cm6533_jd",
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.id_table = cmhid_devices,
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.raw_event = cmhid_raw_event,
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.input_configured = cmhid_input_configured,
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.probe = cmhid_probe,
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.remove = cmhid_remove,
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.input_mapping = cmhid_input_mapping,
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};
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module_hid_driver(cmhid_driver);
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