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87fcb6a69e
This is a common pattern in the HID drivers to reset the drvdata. Some do it properly, some do it only in case of failure. But, this is actually already handled by driver core, so there is no need to do it manually. [for hid-sensor-hub.c] Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> [For hid-picolcd_core.c] Acked-by: Bruno Prémont <bonbons@linux-vserver.org> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
149 lines
3.6 KiB
C
149 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for Google Fiber TV Box remote controls
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*
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* Copyright (c) 2014-2015 Google Inc.
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*
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* Author: Petri Gynther <pgynther@google.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/input.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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#define GFRM100 1 /* Google Fiber GFRM100 (Bluetooth classic) */
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#define GFRM200 2 /* Google Fiber GFRM200 (Bluetooth LE) */
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#define GFRM100_SEARCH_KEY_REPORT_ID 0xF7
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#define GFRM100_SEARCH_KEY_DOWN 0x0
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#define GFRM100_SEARCH_KEY_AUDIO_DATA 0x1
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#define GFRM100_SEARCH_KEY_UP 0x2
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static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
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static u8 search_key_up[3] = {0x40, 0x00, 0x00};
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static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
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if (hdev_type == GFRM100) {
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if (usage->hid == (HID_UP_CONSUMER | 0x4)) {
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/* Consumer.0004 -> KEY_INFO */
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hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO);
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return 1;
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}
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if (usage->hid == (HID_UP_CONSUMER | 0x41)) {
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/* Consumer.0041 -> KEY_OK */
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hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK);
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return 1;
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}
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}
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return 0;
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}
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static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report,
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u8 *data, int size)
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{
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unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
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int ret = 0;
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if (hdev_type != GFRM100)
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return 0;
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if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID)
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return 0;
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/*
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* Convert GFRM100 Search key reports into Consumer.0221 (Key.Search)
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* reports. Ignore audio data.
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*/
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switch (data[1]) {
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case GFRM100_SEARCH_KEY_DOWN:
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ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn,
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sizeof(search_key_dn), 1);
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break;
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case GFRM100_SEARCH_KEY_AUDIO_DATA:
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break;
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case GFRM100_SEARCH_KEY_UP:
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ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up,
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sizeof(search_key_up), 1);
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break;
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default:
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break;
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}
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return (ret < 0) ? ret : -1;
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}
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static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput)
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{
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/*
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* Enable software autorepeat with:
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* - repeat delay: 400 msec
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* - repeat period: 100 msec
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*/
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input_enable_softrepeat(hidinput->input, 400, 100);
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return 0;
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}
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static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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hid_set_drvdata(hdev, (void *) id->driver_data);
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ret = hid_parse(hdev);
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if (ret)
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goto done;
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if (id->driver_data == GFRM100) {
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/*
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* GFRM100 HID Report Descriptor does not describe the Search
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* key reports. Thus, we need to add it manually here, so that
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* those reports reach gfrm_raw_event() from hid_input_report().
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*/
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if (!hid_register_report(hdev, HID_INPUT_REPORT,
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GFRM100_SEARCH_KEY_REPORT_ID, 0)) {
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ret = -ENOMEM;
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goto done;
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}
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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done:
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return ret;
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}
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static const struct hid_device_id gfrm_devices[] = {
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{ HID_BLUETOOTH_DEVICE(0x58, 0x2000),
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.driver_data = GFRM100 },
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{ HID_BLUETOOTH_DEVICE(0x471, 0x2210),
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.driver_data = GFRM200 },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, gfrm_devices);
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static struct hid_driver gfrm_driver = {
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.name = "gfrm",
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.id_table = gfrm_devices,
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.probe = gfrm_probe,
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.input_mapping = gfrm_input_mapping,
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.raw_event = gfrm_raw_event,
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.input_configured = gfrm_input_configured,
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};
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module_hid_driver(gfrm_driver);
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MODULE_AUTHOR("Petri Gynther <pgynther@google.com>");
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MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
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MODULE_LICENSE("GPL");
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