Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752119AbaFEV3l (ORCPT ); Thu, 5 Jun 2014 17:29:41 -0400 Received: from mail-la0-f50.google.com ([209.85.215.50]:64126 "EHLO mail-la0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751409AbaFEV3h (ORCPT ); Thu, 5 Jun 2014 17:29:37 -0400 From: Janne Kanniainen To: cooloney@gmail.com, rpurdie@rpsys.net Cc: linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, Janne Kanniainen Subject: [PATCH v2] leds: USB: Add support for MSI GT683R led panels Date: Fri, 6 Jun 2014 00:29:06 +0300 Message-Id: <1402003746-6354-1-git-send-email-janne.kanniainen@gmail.com> X-Mailer: git-send-email 1.9.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This driver adds support for USB controlled led panels that exist in MSI GT683R laptop. Changes in v2: - sorted headers to alphabetic order - using devm_kzalloc - using BIT(n) - using usb_control_msg instead of usb_submit_urb - removing unneeded code Signed-off-by: Janne Kanniainen --- drivers/leds/Kconfig | 6 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-gt683r.c | 158 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 165 insertions(+) create mode 100644 drivers/leds/leds-gt683r.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 6de9dfb..2cffa0c 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -487,6 +487,12 @@ config LEDS_BLINKM This option enables support for the BlinkM RGB LED connected through I2C. Say Y to enable support for the BlinkM LED. +config LEDS_GT683R + tristate "LED support for the MSI GT683R" + depends on LEDS_CLASS && USB + help + This option enables support for the MSI GT683R LEDS + comment "LED Triggers" source "drivers/leds/trigger/Kconfig" diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 3cd76db..af5fb4e 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o +obj-$(CONFIG_LEDS_GT683R) += leds-gt683r.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o diff --git a/drivers/leds/leds-gt683r.c b/drivers/leds/leds-gt683r.c new file mode 100644 index 0000000..5a204ea --- /dev/null +++ b/drivers/leds/leds-gt683r.c @@ -0,0 +1,158 @@ +/* + * MSI GT683R led driver + * + * Copyright (c) 2014 Janne Kanniainen + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include +#include +#include + +#define USB_DEVICE_ID_MSI_GT683R_LED_PANEL 0xff00 +#define USB_VENDOR_ID_MSI 0x1770 + +#define GT683R_LED_BACK BIT(0) +#define GT683R_LED_SIDE BIT(1) +#define GT683R_LED_FRONT BIT(2) +#define GT683R_LED_ALL (GT683R_LED_BACK | GT683R_LED_SIDE | GT683R_LED_FRONT) + +#define GT683R_LED_OFF 0 +#define GT683R_LED_AUDIO 2 +#define GT683R_LED_BREATHING 3 +#define GT683R_LED_NORMAL 5 + +struct gt683r_led { + struct usb_device *usb_dev; + struct usb_endpoint_descriptor *ep; + struct led_classdev led_dev; + struct mutex lock; + struct work_struct work; + enum led_brightness brightness; +}; + +static const struct usb_device_id gt683r_led_id[] = { + { USB_DEVICE(USB_VENDOR_ID_MSI, USB_DEVICE_ID_MSI_GT683R_LED_PANEL) }, + { } +}; + +static const u64 gt683r_led_select_leds = 0x300201ULL; +static const u64 gt683r_led_select_type = 0x100200201ULL; + +static void gt683r_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct gt683r_led *led = + container_of(led_cdev, struct gt683r_led, led_dev); + + mutex_lock(&led->lock); + + led->brightness = brightness; + + schedule_work(&led->work); +} + +static int gt683r_led_snd_msg(struct gt683r_led *led, u64 msg) +{ + int result = usb_control_msg(led->usb_dev, + usb_sndctrlpipe(led->usb_dev, + led->ep->bEndpointAddress), + 0x09, 0x22, 0x0301, 0x0000, + &msg, sizeof(u64), USB_CTRL_SET_TIMEOUT); + if (result) + dev_err(&led->usb_dev->dev, + "Failed to send control message: %i\n", result); + + return result; +} + +static void gt683r_led_set(struct gt683r_led *led, char type) +{ + gt683r_led_snd_msg(led, gt683r_led_select_leds | + (GT683R_LED_ALL << 24)); + gt683r_led_snd_msg(led, gt683r_led_select_type | + (type << 24)); +} + +static void gt683r_led_work(struct work_struct *work) +{ + struct gt683r_led *led = + container_of(work, struct gt683r_led, work); + + if (led->brightness) + gt683r_led_set(led, GT683R_LED_NORMAL); + else + gt683r_led_set(led, GT683R_LED_OFF); + + mutex_unlock(&led->lock); +} + +static struct led_classdev gt683r_led_dev = { + .name = "gt683r-led", + .brightness_set = gt683r_brightness_set, + .max_brightness = 1, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static int gt683r_led_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + int ret = 0; + struct gt683r_led *led = + devm_kzalloc(&intf->dev, sizeof(struct gt683r_led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + led->usb_dev = interface_to_usbdev(intf); + usb_set_intfdata(intf, led); + + led->ep = &led->usb_dev->ep0.desc; + if (!usb_endpoint_xfer_control(led->ep) || + usb_endpoint_maxp(led->ep) != sizeof(u64)) + return -EINVAL; + + led->led_dev = gt683r_led_dev; + ret = led_classdev_register(&led->usb_dev->dev, &led->led_dev); + if (ret) { + dev_err(&led->usb_dev->dev, "Could not register led_classdev\n"); + return ret; + } + + mutex_init(&led->lock); + INIT_WORK(&led->work, gt683r_led_work); + + return 0; +} + +static void gt683r_led_disconnect(struct usb_interface *intf) +{ + struct gt683r_led *led = usb_get_intfdata(intf); + + led_classdev_unregister(&led->led_dev); + cancel_work_sync(&led->work); +} + +static struct usb_driver gt683r_led_driver = { + .probe = gt683r_led_probe, + .disconnect = gt683r_led_disconnect, + .name = "GT683R Led Driver", + .id_table = gt683r_led_id, +}; + +module_usb_driver(gt683r_led_driver); + +MODULE_AUTHOR("Janne Kanniainen"); +MODULE_DESCRIPTION("MSI GT683R led driver"); +MODULE_LICENSE("GPL"); -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/