Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * MSI GT683R led driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2014 Janne Kanniainen <janne.kanniainen@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "hid-ids.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define GT683R_BUFFER_SIZE			8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * GT683R_LED_OFF: all LEDs are off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * GT683R_LED_AUDIO: LEDs brightness depends on sound level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * GT683R_LED_BREATHING: LEDs brightness varies at human breathing rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * GT683R_LED_NORMAL: LEDs are fully on when enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) enum gt683r_led_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	GT683R_LED_OFF = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	GT683R_LED_AUDIO = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	GT683R_LED_BREATHING = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	GT683R_LED_NORMAL = 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) enum gt683r_panels {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	GT683R_LED_BACK = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	GT683R_LED_SIDE = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	GT683R_LED_FRONT = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	GT683R_LED_COUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static const char * const gt683r_panel_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	"back",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	"side",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	"front",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) struct gt683r_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct hid_device *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct led_classdev led_devs[GT683R_LED_COUNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct work_struct work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	enum led_brightness brightnesses[GT683R_LED_COUNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	enum gt683r_led_mode mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static const struct hid_device_id gt683r_led_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	{ HID_USB_DEVICE(USB_VENDOR_ID_MSI, USB_DEVICE_ID_MSI_GT683R_LED_PANEL) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) MODULE_DEVICE_TABLE(hid, gt683r_led_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static void gt683r_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 				enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	struct device *dev = led_cdev->dev->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct hid_device *hdev = to_hid_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct gt683r_led *led = hid_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	for (i = 0; i < GT683R_LED_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		if (led_cdev == &led->led_devs[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (i < GT683R_LED_COUNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		led->brightnesses[i] = brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		schedule_work(&led->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static ssize_t mode_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 				struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	u8 sysfs_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct hid_device *hdev = to_hid_device(dev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct gt683r_led *led = hid_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (led->mode == GT683R_LED_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		sysfs_mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	else if (led->mode == GT683R_LED_AUDIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		sysfs_mode = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		sysfs_mode = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return scnprintf(buf, PAGE_SIZE, "%u\n", sysfs_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static ssize_t mode_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	u8 sysfs_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct hid_device *hdev = to_hid_device(dev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct gt683r_led *led = hid_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (kstrtou8(buf, 10, &sysfs_mode) || sysfs_mode > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	mutex_lock(&led->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (sysfs_mode == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		led->mode = GT683R_LED_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	else if (sysfs_mode == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		led->mode = GT683R_LED_AUDIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		led->mode = GT683R_LED_BREATHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	mutex_unlock(&led->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	schedule_work(&led->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int gt683r_led_snd_msg(struct gt683r_led *led, u8 *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	ret = hid_hw_raw_request(led->hdev, msg[0], msg, GT683R_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 				HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (ret != GT683R_BUFFER_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		hid_err(led->hdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			"failed to send set report request: %i\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int gt683r_leds_set(struct gt683r_led *led, u8 leds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	u8 *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	buffer = kzalloc(GT683R_BUFFER_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	buffer[0] = 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	buffer[1] = 0x02;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	buffer[2] = 0x30;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	buffer[3] = leds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	ret = gt683r_led_snd_msg(led, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int gt683r_mode_set(struct gt683r_led *led, u8 mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	u8 *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	buffer = kzalloc(GT683R_BUFFER_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	buffer[0] = 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	buffer[1] = 0x02;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	buffer[2] = 0x20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	buffer[3] = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	buffer[4] = 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	ret = gt683r_led_snd_msg(led, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static void gt683r_led_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	u8 leds = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	u8 mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	struct gt683r_led *led = container_of(work, struct gt683r_led, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	mutex_lock(&led->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	for (i = 0; i < GT683R_LED_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		if (led->brightnesses[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			leds |= BIT(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (gt683r_leds_set(led, leds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (leds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		mode = led->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		mode = GT683R_LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	gt683r_mode_set(led, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	mutex_unlock(&led->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static DEVICE_ATTR_RW(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static struct attribute *gt683r_led_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	&dev_attr_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static const struct attribute_group gt683r_led_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	.name = "gt683r",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	.attrs = gt683r_led_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static const struct attribute_group *gt683r_led_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	&gt683r_led_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int gt683r_led_probe(struct hid_device *hdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			const struct hid_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	int name_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	struct gt683r_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	led = devm_kzalloc(&hdev->dev, sizeof(*led), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (!led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	mutex_init(&led->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	INIT_WORK(&led->work, gt683r_led_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	led->mode = GT683R_LED_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	led->hdev = hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	hid_set_drvdata(hdev, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	ret = hid_parse(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		hid_err(hdev, "hid parsing failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		hid_err(hdev, "hw start failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	for (i = 0; i < GT683R_LED_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		name_sz = strlen(dev_name(&hdev->dev)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 				strlen(gt683r_panel_names[i]) + 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		name = devm_kzalloc(&hdev->dev, name_sz, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		if (!name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		snprintf(name, name_sz, "%s::%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 				dev_name(&hdev->dev), gt683r_panel_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		led->led_devs[i].name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		led->led_devs[i].max_brightness = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		led->led_devs[i].brightness_set = gt683r_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		led->led_devs[i].groups = gt683r_led_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		ret = led_classdev_register(&hdev->dev, &led->led_devs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			hid_err(hdev, "could not register led device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	for (i = i - 1; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		led_classdev_unregister(&led->led_devs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	hid_hw_stop(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static void gt683r_led_remove(struct hid_device *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	struct gt683r_led *led = hid_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	for (i = 0; i < GT683R_LED_COUNT; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		led_classdev_unregister(&led->led_devs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	flush_work(&led->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	hid_hw_stop(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static struct hid_driver gt683r_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.probe = gt683r_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.remove = gt683r_led_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	.name = "gt683r_led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	.id_table = gt683r_led_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) module_hid_driver(gt683r_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) MODULE_AUTHOR("Janne Kanniainen");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) MODULE_DESCRIPTION("MSI GT683R led driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) MODULE_LICENSE("GPL");