On Wed, Oct 21, 2015 at 12:04 PM, Petri Gynther <pgynther@xxxxxxxxxx> wrote:
>
> Add HID driver for Google Fiber TV Box remote controls
>
> Signed-off-by: Petri Gynther <pgynther@xxxxxxxxxx>
> ---
> drivers/hid/Kconfig | 6 ++
> drivers/hid/Makefile | 1 +
> drivers/hid/hid-gfrm.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 165 insertions(+)
> create mode 100644 drivers/hid/hid-gfrm.c
>
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 6ab51ae..7245b7f 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -257,6 +257,12 @@ config HID_GEMBIRD
> ---help---
> Support for Gembird JPD-DualForce 2.
>
> +config HID_GFRM
> + tristate "Google Fiber TV Box remote control support"
> + depends on HID
> + ---help---
> + Support for Google Fiber TV Box remote controls
> +
> config HID_HOLTEK
> tristate "Holtek HID devices"
> depends on USB_HID
> diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
> index e6441bc..571d176 100644
> --- a/drivers/hid/Makefile
> +++ b/drivers/hid/Makefile
> @@ -37,6 +37,7 @@ obj-$(CONFIG_HID_ELECOM) += hid-elecom.o
> obj-$(CONFIG_HID_ELO) += hid-elo.o
> obj-$(CONFIG_HID_EZKEY) += hid-ezkey.o
> obj-$(CONFIG_HID_GEMBIRD) += hid-gembird.o
> +obj-$(CONFIG_HID_GFRM) += hid-gfrm.o
> obj-$(CONFIG_HID_GT683R) += hid-gt683r.o
> obj-$(CONFIG_HID_GYRATION) += hid-gyration.o
> obj-$(CONFIG_HID_HOLTEK) += hid-holtek-kbd.o
> diff --git a/drivers/hid/hid-gfrm.c b/drivers/hid/hid-gfrm.c
> new file mode 100644
> index 0000000..4d7b7e7
> --- /dev/null
> +++ b/drivers/hid/hid-gfrm.c
> @@ -0,0 +1,158 @@
> +/*
> + * HID driver for Google Fiber TV Box remote controls
> + *
> + * Copyright (c) 2014-2015 Google Inc.
> + *
> + * Author: Petri Gynther <pgynther@xxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the Free
> + * Software Foundation; either version 2 of the License, or (at your option)
> + * any later version.
> + */
> +#include <linux/device.h>
> +#include <linux/hid.h>
> +#include <linux/input.h>
> +#include <linux/module.h>
> +
> +#include "hid-ids.h"
> +
> +#define GFRM100 1 /* Google Fiber GFRM100 (Bluetooth classic) */
> +#define GFRM200 2 /* Google Fiber GFRM200 (Bluetooth LE) */
> +
> +#define GFRM100_SEARCH_KEY_REPORT_ID 0xF7
> +#define GFRM100_SEARCH_KEY_DOWN 0x0
> +#define GFRM100_SEARCH_KEY_AUDIO_DATA 0x1
> +#define GFRM100_SEARCH_KEY_UP 0x2
> +
> +static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
> +static u8 search_key_up[3] = {0x40, 0x00, 0x00};
> +
> +static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
> + struct hid_field *field, struct hid_usage *usage,
> + unsigned long **bit, int *max)
> +{
> + unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
> +
> + if (hdev_type == GFRM100) {
> + if (usage->hid == (HID_UP_CONSUMER | 0x4)) {
> + /* Consumer.0004 -> KEY_INFO */
> + hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO);
> + return 1;
> + }
> +
> + if (usage->hid == (HID_UP_CONSUMER | 0x41)) {
> + /* Consumer.0041 -> KEY_OK */
> + hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK);
> + return 1;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report,
> + u8 *data, int size)
> +{
> + unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
> + int ret = 0;
> +
> + if (hdev_type != GFRM100)
> + return 0;
> +
> + if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID)
> + return 0;
> +
> + /*
> + * Convert GFRM100 Search key reports into Consumer.0221 (Key.Search)
> + * reports. Ignore audio data.
> + */
> + switch (data[1]) {
> + case GFRM100_SEARCH_KEY_DOWN:
> + ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn,
> + sizeof(search_key_dn), 1);
> + break;
> +
> + case GFRM100_SEARCH_KEY_AUDIO_DATA:
> + break;
> +
> + case GFRM100_SEARCH_KEY_UP:
> + ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up,
> + sizeof(search_key_up), 1);
> + break;
> +
> + default:
> + break;
> + }
> +
> + return (ret < 0) ? ret : -1;
> +}
> +
> +static void gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput)
> +{
> + /*
> + * Enable software autorepeat with:
> + * - repeat delay: 400 msec
> + * - repeat period: 100 msec
> + */
> + input_enable_softrepeat(hidinput->input, 400, 100);
Depends on input tree commit:
commit 027c71bbae3a6eeff00c11d1b708593a5c790314
Author: Petri Gynther <pgynther@xxxxxxxxxx>
Date: Tue Oct 13 23:13:55 2015 -0700
Input: improve autorepeat initialization
>
> +}
> +
> +static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id)
> +{
> + int ret;
> +
> + hid_set_drvdata(hdev, (void *) id->driver_data);
> +
> + ret = hid_parse(hdev);
> + if (ret)
> + goto done;
> +
> + if (id->driver_data == GFRM100) {
> + /*
> + * GFRM100 HID Report Descriptor does not describe the Search
> + * key reports. Thus, we need to add it manually here, so that
> + * those reports reach gfrm_raw_event() from hid_input_report().
> + */
> + if (!hid_register_report(hdev, HID_INPUT_REPORT,
> + GFRM100_SEARCH_KEY_REPORT_ID)) {
> + ret = -ENOMEM;
> + goto done;
> + }
> + }
> +
> + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
> +done:
> + return ret;
> +}
> +
> +static void gfrm_remove(struct hid_device *hdev)
> +{
> + hid_hw_stop(hdev);
> + hid_set_drvdata(hdev, NULL);
> +}
> +
> +static const struct hid_device_id gfrm_devices[] = {
> + { HID_BLUETOOTH_DEVICE(0x58, 0x2000),
> + .driver_data = GFRM100 },
> + { HID_BLUETOOTH_DEVICE(0x471, 0x2210),
> + .driver_data = GFRM200 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(hid, gfrm_devices);
> +
> +static struct hid_driver gfrm_driver = {
> + .name = "gfrm",
> + .id_table = gfrm_devices,
> + .probe = gfrm_probe,
> + .remove = gfrm_remove,
> + .input_mapping = gfrm_input_mapping,
> + .raw_event = gfrm_raw_event,
> + .input_configured = gfrm_input_configured,
> +};
> +
> +module_hid_driver(gfrm_driver);
> +
> +MODULE_AUTHOR("Petri Gynther <pgynther@xxxxxxxxxx>");
> +MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
> +MODULE_LICENSE("GPL");
> --
> 2.6.0.rc2.230.g3dd15c0
>
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