This patch migrates the USB LED driver to the HID subsystem.
Supported are Dream Cheeky Webmail Notifier / Friends Alert
and Riso Kagaku Webmail Notifier.
Benefits:
- Avoid using USB low-level calls and use the HID subsystem instead
(as this device provides a USB HID interface)
- Use standard LED subsystem instead of proprietary sysfs entries,
this allows e.g. to use the device with features like triggers
Successfully tested with a Dream Cheeky Webmail Notifier and a
Riso Kagaku Webmail Notifier compatible device.
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
drivers/hid/Kconfig | 12 ++
drivers/hid/Makefile | 1 +
drivers/hid/hid-core.c | 6 +-
drivers/hid/hid-ids.h | 2 +
drivers/hid/hid-usb-led.c | 276 ++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 294 insertions(+), 3 deletions(-)
create mode 100644 drivers/hid/hid-usb-led.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 5646ca4..adc9ce6 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -841,6 +841,18 @@ config THRUSTMASTER_FF
a THRUSTMASTER Dual Trigger 3-in-1 or a THRUSTMASTER Ferrari GT
Rumble Force or Force Feedback Wheel.
+config HID_USB_LED
+ tristate "Simple USB RGB LED support"
+ depends on HID
+ depends on LEDS_CLASS
+ ---help---
+ Support for simple USB RGB LED devices. Currently supported are the
+ Riso Kagaku Webmail Notifier and the Dream Cheeky Webmail Notifier
+ and Friends Alert.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-usb-led.
+
config HID_WACOM
tristate "Wacom Intuos/Graphire tablet support (USB)"
depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index a2fb562..3014bdd 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -96,6 +96,7 @@ obj-$(CONFIG_HID_TIVO) += hid-tivo.o
obj-$(CONFIG_HID_TOPSEED) += hid-topseed.o
obj-$(CONFIG_HID_TWINHAN) += hid-twinhan.o
obj-$(CONFIG_HID_UCLOGIC) += hid-uclogic.o
+obj-$(CONFIG_HID_USB_LED) += hid-usb-led.o
obj-$(CONFIG_HID_XINMO) += hid-xinmo.o
obj-$(CONFIG_HID_ZEROPLUS) += hid-zpff.o
obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 8ea3a26..eb674ce 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1879,6 +1879,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, USB_DEVICE_ID_DREAM_CHEEKY_WN) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, USB_DEVICE_ID_DREAM_CHEEKY_FA) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0009) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0030) },
@@ -2008,6 +2010,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_PLANTRONICS, HID_ANY_ID) },
{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_RISO_KAGAKU, USB_DEVICE_ID_RI_KA_WEBMAIL) },
#if IS_ENABLED(CONFIG_HID_ROCCAT)
{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
@@ -2348,8 +2351,6 @@ static const struct hid_device_id hid_ignore_list[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
- { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
- { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x000a) },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, 0x0400) },
{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, 0x0401) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
@@ -2486,7 +2487,6 @@ static const struct hid_device_id hid_ignore_list[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DPAD) },
#endif
{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
- { HID_USB_DEVICE(USB_VENDOR_ID_RISO_KAGAKU, USB_DEVICE_ID_RI_KA_WEBMAIL) },
{ }
};
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 3eec09a..e104aba 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -334,6 +334,8 @@
#define USB_DEVICE_ID_ELECOM_BM084 0x0061
#define USB_VENDOR_ID_DREAM_CHEEKY 0x1d34
+#define USB_DEVICE_ID_DREAM_CHEEKY_WN 0x0004
+#define USB_DEVICE_ID_DREAM_CHEEKY_FA 0x000a
#define USB_VENDOR_ID_ELITEGROUP 0x03fc
#define USB_DEVICE_ID_ELITEGROUP_05D8 0x05d8
diff --git a/drivers/hid/hid-usb-led.c b/drivers/hid/hid-usb-led.c
new file mode 100644
index 0000000..c7f5a62
--- /dev/null
+++ b/drivers/hid/hid-usb-led.c
@@ -0,0 +1,276 @@
+/*
+ * Simple USB RGB LED driver
+ *
+ * Copyright 2016 Heiner Kallweit <hkallweit1@xxxxxxxxx>
+ * Based on drivers/hid/hid-thingm.c and
+ * drivers/usb/misc/usbled.c
+ *
+ * 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"
+
+enum led_report_type {
+ RAW_REQUEST,
+ OUTPUT_REPORT
+};
+
+static unsigned const char riso_kagaku_tbl[] = {
+/* R+2G+4B -> riso kagaku color index */
+ [0] = 0, /* black */
+ [1] = 2, /* red */
+ [2] = 1, /* green */
+ [3] = 5, /* yellow */
+ [4] = 3, /* blue */
+ [5] = 6, /* magenta */
+ [6] = 4, /* cyan */
+ [7] = 7 /* white */
+};
+
+#define RISO_KAGAKU_IX(r, g, b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]
+
+struct usbled_device;
+
+struct usbled_type {
+ const char *name;
+ const char *short_name;
+ enum led_brightness max_brightness;
+ size_t report_size;
+ enum led_report_type report_type;
+ u8 report_id;
+ int (*init)(struct usbled_device *udev);
+ int (*write)(struct led_classdev *cdev, enum led_brightness br);
+};
+
+struct usbled_led {
+ struct led_classdev cdev;
+ struct usbled_device *udev;
+ char name[32];
+};
+
+struct usbled_device {
+ const struct usbled_type *type;
+ struct usbled_led red;
+ struct usbled_led green;
+ struct usbled_led blue;
+ struct hid_device *hdev;
+ struct mutex lock;
+};
+
+#define MAX_REPORT_SIZE 16
+
+#define to_usbled_led(arg) container_of(arg, struct usbled_led, cdev)
+
+static bool riso_kagaku_switch_green_blue;
+module_param(riso_kagaku_switch_green_blue, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(riso_kagaku_switch_green_blue,
+ "switch green and blue RGB component for Riso Kagaku devices");
+
+static int usbled_send(struct usbled_device *udev, __u8 *buf)
+{
+ int ret;
+
+ buf[0] = udev->type->report_id;
+
+ mutex_lock(&udev->lock);
+
+ if (udev->type->report_type == RAW_REQUEST)
+ ret = hid_hw_raw_request(udev->hdev, buf[0], buf,
+ udev->type->report_size,
+ HID_FEATURE_REPORT,
+ HID_REQ_SET_REPORT);
+ else if (udev->type->report_type == OUTPUT_REPORT)
+ ret = hid_hw_output_report(udev->hdev, buf,
+ udev->type->report_size);
+ else
+ ret = -EINVAL;
+
+ mutex_unlock(&udev->lock);
+
+ if (ret < 0)
+ return ret;
+
+ return ret == udev->type->report_size ? 0 : -EMSGSIZE;
+}
+
+static u8 riso_kagaku_index(struct usbled_device *udev)
+{
+ enum led_brightness r, g, b;
+
+ r = udev->red.cdev.brightness;
+ g = udev->green.cdev.brightness;
+ b = udev->blue.cdev.brightness;
+
+ if (riso_kagaku_switch_green_blue)
+ return RISO_KAGAKU_IX(r, b, g);
+ else
+ return RISO_KAGAKU_IX(r, g, b);
+}
+
+static int riso_kagaku_write(struct led_classdev *cdev, enum led_brightness br)
+{
+ struct usbled_led *uled = to_usbled_led(cdev);
+ struct usbled_device *udev = uled->udev;
+ __u8 buf[MAX_REPORT_SIZE] = {};
+
+ buf[1] = riso_kagaku_index(udev);
+
+ return usbled_send(udev, buf);
+}
+
+static const struct usbled_type usbled_riso_kagaku = {
+ .name = "Riso Kagaku Webmail Notifier",
+ .short_name = "riso_kagaku",
+ .max_brightness = 1,
+ .report_size = 6,
+ .report_type = OUTPUT_REPORT,
+ .report_id = 0,
+ .write = riso_kagaku_write,
+};
+
+static int dream_cheeky_write(struct led_classdev *cdev, enum led_brightness br)
+{
+ struct usbled_led *uled = to_usbled_led(cdev);
+ struct usbled_device *udev = uled->udev;
+ __u8 buf[MAX_REPORT_SIZE] = {};
+
+ buf[1] = udev->red.cdev.brightness;
+ buf[2] = udev->green.cdev.brightness;
+ buf[3] = udev->blue.cdev.brightness;
+ buf[7] = 0x1a;
+ buf[8] = 0x05;
+
+ return usbled_send(udev, buf);
+}
+
+static int dream_cheeky_init(struct usbled_device *udev)
+{
+ __u8 buf[MAX_REPORT_SIZE] = {};
+
+ /* Dream Cheeky magic */
+ buf[1] = 0x1f;
+ buf[2] = 0x02;
+ buf[4] = 0x5f;
+ buf[7] = 0x1a;
+ buf[8] = 0x03;
+
+ return usbled_send(udev, buf);
+}
+
+static const struct usbled_type usbled_dream_cheeky = {
+ .name = "Dream Cheeky Webmail Notifier",
+ .short_name = "dream_cheeky",
+ .max_brightness = 31,
+ .report_size = 9,
+ .report_type = RAW_REQUEST,
+ .report_id = 0,
+ .init = dream_cheeky_init,
+ .write = dream_cheeky_write,
+};
+
+static int usbled_init_led(struct usbled_led *led, const char *color_name,
+ struct usbled_device *udev, unsigned int minor)
+{
+ snprintf(led->name, sizeof(led->name), "%s%u:%s",
+ udev->type->short_name, minor, color_name);
+ led->cdev.name = led->name;
+ led->cdev.max_brightness = udev->type->max_brightness;
+ led->cdev.brightness_set_blocking = udev->type->write;
+ led->cdev.flags = LED_HW_PLUGGABLE;
+ led->udev = udev;
+
+ return devm_led_classdev_register(&udev->hdev->dev, &led->cdev);
+}
+
+static int usbled_init_rgb(struct usbled_device *udev, unsigned int minor)
+{
+ int ret;
+
+ /* Register the red diode */
+ ret = usbled_init_led(&udev->red, "red", udev, minor);
+ if (ret)
+ return ret;
+
+ /* Register the green diode */
+ ret = usbled_init_led(&udev->green, "green", udev, minor);
+ if (ret)
+ return ret;
+
+ /* Register the blue diode */
+ return usbled_init_led(&udev->blue, "blue", udev, minor);
+}
+
+static int usbled_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ struct usbled_device *udev;
+ unsigned int minor;
+ int ret;
+
+ udev = devm_kzalloc(&hdev->dev, sizeof(*udev), GFP_KERNEL);
+ if (!udev)
+ return -ENOMEM;
+
+ ret = hid_parse(hdev);
+ if (ret)
+ return ret;
+
+ udev->hdev = hdev;
+ udev->type = (const struct usbled_type *)id->driver_data;
+ mutex_init(&udev->lock);
+
+ if (udev->type->init) {
+ ret = udev->type->init(udev);
+ if (ret)
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+ if (ret)
+ return ret;
+
+ minor = ((struct hidraw *) hdev->hidraw)->minor;
+
+ ret = usbled_init_rgb(udev, minor);
+ if (ret) {
+ hid_hw_stop(hdev);
+ return ret;
+ }
+
+ dev_info(&hdev->dev, "%s initialized\n", udev->type->name);
+
+ return 0;
+}
+
+static const struct hid_device_id usbled_table[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_RISO_KAGAKU,
+ USB_DEVICE_ID_RI_KA_WEBMAIL),
+ .driver_data = (kernel_ulong_t)&usbled_riso_kagaku },
+ { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY,
+ USB_DEVICE_ID_DREAM_CHEEKY_WN),
+ .driver_data = (kernel_ulong_t)&usbled_dream_cheeky },
+ { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY,
+ USB_DEVICE_ID_DREAM_CHEEKY_FA),
+ .driver_data = (kernel_ulong_t)&usbled_dream_cheeky },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, usbled_table);
+
+static struct hid_driver usbled_driver = {
+ .name = "usb-led",
+ .probe = usbled_probe,
+ .id_table = usbled_table,
+};
+
+module_hid_driver(usbled_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Heiner Kallweit <hkallweit1@xxxxxxxxx>");
+MODULE_DESCRIPTION("Simple USB RGB LED driver");
--
2.8.3
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