@@ -236,6 +236,13 @@ config LEDS_BD2802
This option enables support for BD2802GU RGB LED driver chips
accessed via the I2C bus.
+config LEDS_DELL_NETBOOKS
+ tristate "External LED on Dell Business Netbooks"
+ depends on LEDS_CLASS && X86 && ACPI_WMI
+ help
+ This adds support for the Latitude 2100 and similar
+ notebooks that have an external LED.
+
comment "LED Triggers"
config LEDS_TRIGGERS
@@ -29,6 +29,7 @@ obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
+obj-$(CONFIG_LEDS_DELL_NETBOOKS) += dell-led.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
new file mode 100644
@@ -0,0 +1,200 @@
+/*
+ * dell_led.c - Dell LED Driver
+ *
+ * Copyright (C) 2010 Dell Inc.
+ * Louis Davis <louis_davis@dell.com>
+ * Jim Dailey <jim_dailey@dell.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.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/leds.h>
+
+MODULE_AUTHOR("Louis Davis/Jim Dailey");
+MODULE_DESCRIPTION("Dell LED Control Driver");
+MODULE_LICENSE("GPL");
+
+#define DELL_LED_BIOS_GUID "F6E4FE6E-909D-47cb-8BAB-C9F6F2F8D396"
+MODULE_ALIAS("wmi:" DELL_LED_BIOS_GUID);
+
+/* Error Result Codes: */
+#define INVALID_DEVICE_ID 250
+#define INVALID_PARAMETER 251
+#define INVALID_BUFFER 252
+#define INTERFACE_ERROR 253
+#define UNSUPPORTED_COMMAND 254
+#define UNSPECIFIED_ERROR 255
+
+/* Device ID */
+#define DEVICE_ID_PANEL_BACK 1
+
+/* LED Commands */
+#define CMD_LED_ON 16
+#define CMD_LED_OFF 17
+#define CMD_LED_BLINK 18
+
+struct bios_args {
+ unsigned char length;
+ unsigned char result_code;
+ unsigned char device_id;
+ unsigned char command;
+ unsigned char on_time;
+ unsigned char off_time;
+};
+
+static int dell_led_perform_fn(u8 length,
+ u8 result_code,
+ u8 device_id,
+ u8 command,
+ u8 on_time,
+ u8 off_time)
+{
+ struct bios_args *bios_return;
+ u8 return_code;
+ union acpi_object *obj;
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer input;
+ acpi_status status;
+
+ struct bios_args args;
+ args.length = length;
+ args.result_code = result_code;
+ args.device_id = device_id;
+ args.command = command;
+ args.on_time = on_time;
+ args.off_time = off_time;
+
+ input.length = sizeof(struct bios_args);
+ input.pointer = &args;
+
+ status = wmi_evaluate_method(DELL_LED_BIOS_GUID,
+ 1,
+ 1,
+ &input,
+ &output);
+
+ if (ACPI_FAILURE(status))
+ return status;
+
+ obj = output.pointer;
+
+ if (!obj)
+ return -EINVAL;
+ else if (obj->type != ACPI_TYPE_BUFFER) {
+ kfree(obj);
+ return -EINVAL;
+ }
+
+ bios_return = ((struct bios_args *)obj->buffer.pointer);
+ return_code = bios_return->result_code;
+
+ kfree(obj);
+
+ return return_code;
+}
+
+static int led_on(void)
+{
+ return dell_led_perform_fn(3, /* Length of command */
+ INTERFACE_ERROR, /* Init to INTERFACE_ERROR */
+ DEVICE_ID_PANEL_BACK, /* Device ID */
+ CMD_LED_ON, /* Command */
+ 0, /* not used */
+ 0); /* not used */
+}
+
+static int led_off(void)
+{
+ return dell_led_perform_fn(3, /* Length of command */
+ INTERFACE_ERROR, /* Init to INTERFACE_ERROR */
+ DEVICE_ID_PANEL_BACK, /* Device ID */
+ CMD_LED_OFF, /* Command */
+ 0, /* not used */
+ 0); /* not used */
+}
+
+static int led_blink(unsigned char on_eighths,
+ unsigned char off_eighths)
+{
+ return dell_led_perform_fn(5, /* Length of command */
+ INTERFACE_ERROR, /* Init to INTERFACE_ERROR */
+ DEVICE_ID_PANEL_BACK, /* Device ID */
+ CMD_LED_BLINK, /* Command */
+ on_eighths, /* blink on in eigths of a second */
+ off_eighths); /* blink off in eights of a second */
+}
+
+static void dell_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ if (value == LED_OFF)
+ led_off();
+ else
+ led_on();
+}
+
+static int dell_led_blink(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ unsigned long on_eighths;
+ unsigned long off_eighths;
+
+ /* The Dell LED delay is based on 125ms intervals.
+ Need to round up to next interval. */
+
+ on_eighths = (*delay_on + 124) / 125;
+ if (0 == on_eighths)
+ on_eighths = 1;
+ if (on_eighths > 255)
+ on_eighths = 255;
+ *delay_on = on_eighths * 125;
+
+ off_eighths = (*delay_off + 124) / 125;
+ if (0 == off_eighths)
+ off_eighths = 1;
+ if (off_eighths > 255)
+ off_eighths = 255;
+ *delay_off = off_eighths * 125;
+
+ led_blink(on_eighths, off_eighths);
+
+ return 0;
+}
+
+static struct led_classdev dell_led = {
+ .name = "dell::lid",
+ .brightness = LED_OFF,
+ .max_brightness = 1,
+ .brightness_set = dell_led_set,
+ .blink_set = dell_led_blink,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int __init dell_led_init(void)
+{
+ int error = 0;
+
+ if (!wmi_has_guid(DELL_LED_BIOS_GUID))
+ return -ENODEV;
+
+ error = led_off();
+ if (error != 0)
+ return -ENODEV;
+
+ return led_classdev_register(NULL, &dell_led);
+}
+
+static void __exit dell_led_exit(void)
+{
+ led_classdev_unregister(&dell_led);
+
+ led_off();
+}
+
+module_init(dell_led_init);
+module_exit(dell_led_exit);
--
1.6.2.4
From 66bb12c7c267bcf555773dc5162aecd859f2d23b Mon Sep 17 00:00:00 2001
From: Tim Gardner <tim.gardner@canonical.com>
Date: Mon, 22 Feb 2010 08:08:41 -0700
Subject: [PATCH 2/2] UBUNTU: [Config] Enabled CONFIG_LEDS_DELL_NETBOOKS=m
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
debian.master/config/config.common.ubuntu | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
@@ -1998,6 +1998,7 @@ CONFIG_LEDS_CLASS=m
CONFIG_LEDS_CPU=y
CONFIG_LEDS_DA903X=m
CONFIG_LEDS_DAC124S085=m
+CONFIG_LEDS_DELL_NETBOOKS=m
CONFIG_LEDS_GPIO=m
CONFIG_LEDS_GPIO_PLATFORM=y
CONFIG_LEDS_LP3944=m
The following changes since commit ab50f92792c05088e8648571fdd065ddbf64563c: Andy Whitcroft (1): UBUNTU: Ubuntu-2.6.32-14.20 are available in the git repository at: git://kernel.ubuntu.com/rtg/ubuntu-lucid dell-leds Mario Limonciello (1): UBUNTU: SAUCE: [PATCH] v3 - Add Dell Business Class Netbook LED driver Tim Gardner (1): UBUNTU: [Config] Enabled CONFIG_LEDS_DELL_NETBOOKS=m debian.master/config/config.common.ubuntu | 1 + drivers/leds/Kconfig | 7 + drivers/leds/Makefile | 1 + drivers/leds/dell-led.c | 200 +++++++++++++++++++++++++++++ 4 files changed, 209 insertions(+), 0 deletions(-) create mode 100644 drivers/leds/dell-led.c From b943e365c58241ab56ec0e21ba1db5981aec188a Mon Sep 17 00:00:00 2001 From: Mario Limonciello <mario_limonciello@dell.com> Date: Fri, 19 Feb 2010 11:48:20 -0600 Subject: [PATCH 1/2] UBUNTU: SAUCE: [PATCH] v3 - Add Dell Business Class Netbook LED driver Drop after 2.6.34 since this driver should be upstream by then. This patch adds an LED driver to support the Dell Activity LED on the Dell Latitude 2100 netbook and future products to come. The Activity LED is visible externally in the lid so classroom instructors can observe it from a distance. The driver uses the sysfs led_class and provides a standard LED interface. This driver is ready for submission upstream. Signed-off by: Bob Rodgers <Robert_Rodgers@dell.com> Signed-off-by: Louis Davis <Louis_Davis@dell.com> Signed-off-by: Jim Dailey <Jim_Dailey@dell.com>, Developers Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> --- drivers/leds/Kconfig | 7 ++ drivers/leds/Makefile | 1 + drivers/leds/dell-led.c | 200 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 208 insertions(+), 0 deletions(-) create mode 100644 drivers/leds/dell-led.c