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HID: hid-led: add support for devices with multiple independent LEDs 

Add generic support for devices with multiple independent LED's.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Heiner Kallweit 2016-06-21 21:48:26 +02:00 committed by Jiri Kosina
parent 26423b84a3
commit 5bc839367b
1 changed files with 58 additions and 33 deletions
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91
drivers/hid/hid-led.c
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@ -43,12 +43,14 @@ static unsigned const char riso_kagaku_tbl[] = {
#define RISO_KAGAKU_IX(r, g, b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]
struct hidled_device;
struct hidled_rgb;
struct hidled_config {
enum hidled_type type;
const char *name;
const char *short_name;
enum led_brightness max_brightness;
int num_leds;
size_t report_size;
enum hidled_report_type report_type;
u8 report_id;
@ -58,16 +60,22 @@ struct hidled_config {
struct hidled_led {
struct led_classdev cdev;
struct hidled_device *ldev;
struct hidled_rgb *rgb;
char name[32];
};
struct hidled_rgb {
struct hidled_device *ldev;
struct hidled_led red;
struct hidled_led green;
struct hidled_led blue;
u8 num;
};
struct hidled_device {
const struct hidled_config *config;
struct hidled_led red;
struct hidled_led green;
struct hidled_led blue;
struct hid_device *hdev;
struct hidled_rgb *rgb;
struct mutex lock;
};
@ -107,13 +115,13 @@ static int hidled_send(struct hidled_device *ldev, __u8 *buf)
return ret == ldev->config->report_size ? 0 : -EMSGSIZE;
}
static u8 riso_kagaku_index(struct hidled_device *ldev)
static u8 riso_kagaku_index(struct hidled_rgb *rgb)
{
enum led_brightness r, g, b;
r = ldev->red.cdev.brightness;
g = ldev->green.cdev.brightness;
b = ldev->blue.cdev.brightness;
r = rgb->red.cdev.brightness;
g = rgb->green.cdev.brightness;
b = rgb->blue.cdev.brightness;
if (riso_kagaku_switch_green_blue)
return RISO_KAGAKU_IX(r, b, g);
@ -124,27 +132,27 @@ static u8 riso_kagaku_index(struct hidled_device *ldev)
static int riso_kagaku_write(struct led_classdev *cdev, enum led_brightness br)
{
struct hidled_led *led = to_hidled_led(cdev);
struct hidled_device *ldev = led->ldev;
struct hidled_rgb *rgb = led->rgb;
__u8 buf[MAX_REPORT_SIZE] = {};
buf[1] = riso_kagaku_index(ldev);
buf[1] = riso_kagaku_index(rgb);
return hidled_send(ldev, buf);
return hidled_send(rgb->ldev, buf);
}
static int dream_cheeky_write(struct led_classdev *cdev, enum led_brightness br)
{
struct hidled_led *led = to_hidled_led(cdev);
struct hidled_device *ldev = led->ldev;
struct hidled_rgb *rgb = led->rgb;
__u8 buf[MAX_REPORT_SIZE] = {};
buf[1] = ldev->red.cdev.brightness;
buf[2] = ldev->green.cdev.brightness;
buf[3] = ldev->blue.cdev.brightness;
buf[1] = rgb->red.cdev.brightness;
buf[2] = rgb->green.cdev.brightness;
buf[3] = rgb->blue.cdev.brightness;
buf[7] = 0x1a;
buf[8] = 0x05;
return hidled_send(ldev, buf);
return hidled_send(rgb->ldev, buf);
}
static int dream_cheeky_init(struct hidled_device *ldev)
@ -167,6 +175,7 @@ static const struct hidled_config hidled_configs[] = {
.name = "Riso Kagaku Webmail Notifier",
.short_name = "riso_kagaku",
.max_brightness = 1,
.num_leds = 1,
.report_size = 6,
.report_type = OUTPUT_REPORT,
.report_id = 0,
@ -177,6 +186,7 @@ static const struct hidled_config hidled_configs[] = {
.name = "Dream Cheeky Webmail Notifier",
.short_name = "dream_cheeky",
.max_brightness = 31,
.num_leds = 1,
.report_size = 9,
.report_type = RAW_REQUEST,
.report_id = 0,
@ -186,35 +196,41 @@ static const struct hidled_config hidled_configs[] = {
};
static int hidled_init_led(struct hidled_led *led, const char *color_name,
struct hidled_device *ldev, unsigned int minor)
struct hidled_rgb *rgb, unsigned int minor)
{
snprintf(led->name, sizeof(led->name), "%s%u:%s",
ldev->config->short_name, minor, color_name);
led->cdev.name = led->name;
led->cdev.max_brightness = ldev->config->max_brightness;
led->cdev.brightness_set_blocking = ldev->config->write;
led->cdev.flags = LED_HW_PLUGGABLE;
led->ldev = ldev;
const struct hidled_config *config = rgb->ldev->config;
return devm_led_classdev_register(&ldev->hdev->dev, &led->cdev);
if (config->num_leds > 1)
snprintf(led->name, sizeof(led->name), "%s%u:%s:led%u",
config->short_name, minor, color_name, rgb->num);
else
snprintf(led->name, sizeof(led->name), "%s%u:%s",
config->short_name, minor, color_name);
led->cdev.name = led->name;
led->cdev.max_brightness = config->max_brightness;
led->cdev.brightness_set_blocking = config->write;
led->cdev.flags = LED_HW_PLUGGABLE;
led->rgb = rgb;
return devm_led_classdev_register(&rgb->ldev->hdev->dev, &led->cdev);
}
static int hidled_init_rgb(struct hidled_device *ldev, unsigned int minor)
static int hidled_init_rgb(struct hidled_rgb *rgb, unsigned int minor)
{
int ret;
/* Register the red diode */
ret = hidled_init_led(&ldev->red, "red", ldev, minor);
ret = hidled_init_led(&rgb->red, "red", rgb, minor);
if (ret)
return ret;
/* Register the green diode */
ret = hidled_init_led(&ldev->green, "green", ldev, minor);
ret = hidled_init_led(&rgb->green, "green", rgb, minor);
if (ret)
return ret;
/* Register the blue diode */
return hidled_init_led(&ldev->blue, "blue", ldev, minor);
return hidled_init_led(&rgb->blue, "blue", rgb, minor);
}
static int hidled_probe(struct hid_device *hdev, const struct hid_device_id *id)
@ -247,16 +263,25 @@ static int hidled_probe(struct hid_device *hdev, const struct hid_device_id *id)
return ret;
}
ldev->rgb = devm_kcalloc(&hdev->dev, ldev->config->num_leds,
sizeof(struct hidled_rgb), GFP_KERNEL);
if (!ldev->rgb)
return -ENOMEM;
ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
if (ret)
return ret;
minor = ((struct hidraw *) hdev->hidraw)->minor;
ret = hidled_init_rgb(ldev, minor);
if (ret) {
hid_hw_stop(hdev);
return ret;
for (i = 0; i < ldev->config->num_leds; i++) {
ldev->rgb[i].ldev = ldev;
ldev->rgb[i].num = i;
ret = hidled_init_rgb(&ldev->rgb[i], minor);
if (ret) {
hid_hw_stop(hdev);
return ret;
}
}
hid_info(hdev, "%s initialized\n", ldev->config->name);