+++ /dev/null
-/*
- * ThingM blink(1) USB RGB LED driver
- *
- * Copyright 2013-2014 Savoir-faire Linux Inc.
- * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
- *
- * 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, version 2.
- */
-
-#include <linux/hid.h>
-#include <linux/hidraw.h>
-#include <linux/leds.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-
-#include "hid-ids.h"
-
-#define REPORT_ID 1
-#define REPORT_SIZE 9
-
-/* Firmware major number of supported devices */
-#define THINGM_MAJOR_MK1 '1'
-#define THINGM_MAJOR_MK2 '2'
-
-struct thingm_fwinfo {
- char major;
- unsigned numrgb;
- unsigned first;
-};
-
-static const struct thingm_fwinfo thingm_fwinfo[] = {
- {
- .major = THINGM_MAJOR_MK1,
- .numrgb = 1,
- .first = 0,
- }, {
- .major = THINGM_MAJOR_MK2,
- .numrgb = 2,
- .first = 1,
- }
-};
-
-/* A red, green or blue channel, part of an RGB chip */
-struct thingm_led {
- struct thingm_rgb *rgb;
- struct led_classdev ldev;
- char name[32];
-};
-
-/* Basically a WS2812 5050 RGB LED chip */
-struct thingm_rgb {
- struct thingm_device *tdev;
- struct thingm_led red;
- struct thingm_led green;
- struct thingm_led blue;
- u8 num;
-};
-
-struct thingm_device {
- struct hid_device *hdev;
- struct {
- char major;
- char minor;
- } version;
- const struct thingm_fwinfo *fwinfo;
- struct mutex lock;
- struct thingm_rgb *rgb;
-};
-
-static int thingm_send(struct thingm_device *tdev, u8 buf[REPORT_SIZE])
-{
- int ret;
-
- hid_dbg(tdev->hdev, "-> %d %c %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx\n",
- buf[0], buf[1], buf[2], buf[3], buf[4],
- buf[5], buf[6], buf[7], buf[8]);
-
- mutex_lock(&tdev->lock);
-
- ret = hid_hw_raw_request(tdev->hdev, buf[0], buf, REPORT_SIZE,
- HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
-
- mutex_unlock(&tdev->lock);
-
- return ret < 0 ? ret : 0;
-}
-
-static int thingm_recv(struct thingm_device *tdev, u8 buf[REPORT_SIZE])
-{
- int ret;
-
- /*
- * A read consists of two operations: sending the read command
- * and the actual read from the device. Use the mutex to protect
- * the full sequence of both operations.
- */
- mutex_lock(&tdev->lock);
-
- ret = hid_hw_raw_request(tdev->hdev, buf[0], buf, REPORT_SIZE,
- HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
- if (ret < 0)
- goto err;
-
- ret = hid_hw_raw_request(tdev->hdev, buf[0], buf, REPORT_SIZE,
- HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
- if (ret < 0)
- goto err;
-
- ret = 0;
-
- hid_dbg(tdev->hdev, "<- %d %c %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx\n",
- buf[0], buf[1], buf[2], buf[3], buf[4],
- buf[5], buf[6], buf[7], buf[8]);
-err:
- mutex_unlock(&tdev->lock);
- return ret;
-}
-
-static int thingm_version(struct thingm_device *tdev)
-{
- u8 buf[REPORT_SIZE] = { REPORT_ID, 'v', 0, 0, 0, 0, 0, 0, 0 };
- int err;
-
- err = thingm_recv(tdev, buf);
- if (err)
- return err;
-
- tdev->version.major = buf[3];
- tdev->version.minor = buf[4];
-
- return 0;
-}
-
-static int thingm_write_color(struct thingm_rgb *rgb)
-{
- u8 buf[REPORT_SIZE] = { REPORT_ID, 'c', 0, 0, 0, 0, 0, rgb->num, 0 };
-
- buf[2] = rgb->red.ldev.brightness;
- buf[3] = rgb->green.ldev.brightness;
- buf[4] = rgb->blue.ldev.brightness;
-
- return thingm_send(rgb->tdev, buf);
-}
-
-static int thingm_led_set(struct led_classdev *ldev,
- enum led_brightness brightness)
-{
- struct thingm_led *led = container_of(ldev, struct thingm_led, ldev);
-
- return thingm_write_color(led->rgb);
-}
-
-static int thingm_init_led(struct thingm_led *led, const char *color_name,
- struct thingm_rgb *rgb, int minor)
-{
- snprintf(led->name, sizeof(led->name), "thingm%d:%s:led%d",
- minor, color_name, rgb->num);
- led->ldev.name = led->name;
- led->ldev.max_brightness = 255;
- led->ldev.brightness_set_blocking = thingm_led_set;
- led->ldev.flags = LED_HW_PLUGGABLE;
- led->rgb = rgb;
- return devm_led_classdev_register(&rgb->tdev->hdev->dev, &led->ldev);
-}
-
-static int thingm_init_rgb(struct thingm_rgb *rgb)
-{
- const int minor = ((struct hidraw *) rgb->tdev->hdev->hidraw)->minor;
- int err;
-
- /* Register the red diode */
- err = thingm_init_led(&rgb->red, "red", rgb, minor);
- if (err)
- return err;
-
- /* Register the green diode */
- err = thingm_init_led(&rgb->green, "green", rgb, minor);
- if (err)
- return err;
-
- /* Register the blue diode */
- return thingm_init_led(&rgb->blue, "blue", rgb, minor);
-}
-
-static int thingm_probe(struct hid_device *hdev, const struct hid_device_id *id)
-{
- struct thingm_device *tdev;
- int i, err;
-
- tdev = devm_kzalloc(&hdev->dev, sizeof(struct thingm_device),
- GFP_KERNEL);
- if (!tdev)
- return -ENOMEM;
-
- tdev->hdev = hdev;
- hid_set_drvdata(hdev, tdev);
-
- err = hid_parse(hdev);
- if (err)
- return err;
-
- mutex_init(&tdev->lock);
-
- err = thingm_version(tdev);
- if (err)
- return err;
-
- hid_dbg(hdev, "firmware version: %c.%c\n",
- tdev->version.major, tdev->version.minor);
-
- for (i = 0; i < ARRAY_SIZE(thingm_fwinfo) && !tdev->fwinfo; ++i)
- if (thingm_fwinfo[i].major == tdev->version.major)
- tdev->fwinfo = &thingm_fwinfo[i];
-
- if (!tdev->fwinfo) {
- hid_err(hdev, "unsupported firmware %c\n", tdev->version.major);
- return -ENODEV;
- }
-
- tdev->rgb = devm_kzalloc(&hdev->dev,
- sizeof(struct thingm_rgb) * tdev->fwinfo->numrgb,
- GFP_KERNEL);
- if (!tdev->rgb)
- return -ENOMEM;
-
- err = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
- if (err)
- return err;
-
- for (i = 0; i < tdev->fwinfo->numrgb; ++i) {
- struct thingm_rgb *rgb = tdev->rgb + i;
-
- rgb->tdev = tdev;
- rgb->num = tdev->fwinfo->first + i;
- err = thingm_init_rgb(rgb);
- if (err) {
- hid_hw_stop(hdev);
- return err;
- }
- }
-
- return 0;
-}
-
-static const struct hid_device_id thingm_table[] = {
- { HID_USB_DEVICE(USB_VENDOR_ID_THINGM, USB_DEVICE_ID_BLINK1) },
- { }
-};
-MODULE_DEVICE_TABLE(hid, thingm_table);
-
-static struct hid_driver thingm_driver = {
- .name = "thingm",
- .probe = thingm_probe,
- .id_table = thingm_table,
-};
-
-module_hid_driver(thingm_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Vivien Didelot <vivien.didelot@savoirfairelinux.com>");
-MODULE_DESCRIPTION("ThingM blink(1) USB RGB LED driver");
projects / deliverable / linux.git / commitdiff
