|
Matthew Garrett |
f1d2f5d |
commit 9964e2a108292685fbbf0980493c5e9776eac762
|
|
Matthew Garrett |
f1d2f5d |
Author: Seth Forshee <seth.forshee@canonical.com>
|
|
Matthew Garrett |
f1d2f5d |
Date: Fri Mar 16 14:41:21 2012 -0500
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
apple_bl: Add register/unregister functions
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
Add functions to allow other modules to enable or disable apple_bl. This
|
|
Matthew Garrett |
f1d2f5d |
will be used by the gmux driver to disable apple_bl when the gmux is
|
|
Matthew Garrett |
f1d2f5d |
present, as it is a better and more reliable option for brightness
|
|
Matthew Garrett |
f1d2f5d |
control.
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
|
|
Matthew Garrett |
f1d2f5d |
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
diff --git a/drivers/video/backlight/apple_bl.c b/drivers/video/backlight/apple_bl.c
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|
Matthew Garrett |
f1d2f5d |
index be98d15..a523b25 100644
|
|
Matthew Garrett |
f1d2f5d |
--- a/drivers/video/backlight/apple_bl.c
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|
Matthew Garrett |
f1d2f5d |
+++ b/drivers/video/backlight/apple_bl.c
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|
Matthew Garrett |
f1d2f5d |
@@ -24,6 +24,7 @@
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|
Matthew Garrett |
f1d2f5d |
#include <linux/io.h>
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|
Matthew Garrett |
f1d2f5d |
#include <linux/pci.h>
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|
Matthew Garrett |
f1d2f5d |
#include <linux/acpi.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/atomic.h>
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
static struct backlight_device *apple_backlight_device;
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|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
@@ -221,14 +222,32 @@ static struct acpi_driver apple_bl_driver = {
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|
Matthew Garrett |
f1d2f5d |
},
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|
Matthew Garrett |
f1d2f5d |
};
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|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
+static atomic_t apple_bl_registered = ATOMIC_INIT(0);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+int apple_bl_register(void)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ if (atomic_xchg(&apple_bl_registered, 1) == 0)
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|
Matthew Garrett |
f1d2f5d |
+ return acpi_bus_register_driver(&apple_bl_driver);
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|
Matthew Garrett |
f1d2f5d |
+
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|
Matthew Garrett |
f1d2f5d |
+ return 0;
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|
Matthew Garrett |
f1d2f5d |
+}
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|
Matthew Garrett |
f1d2f5d |
+EXPORT_SYMBOL_GPL(apple_bl_register);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+void apple_bl_unregister(void)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ if (atomic_xchg(&apple_bl_registered, 0) == 1)
|
|
Matthew Garrett |
f1d2f5d |
+ acpi_bus_unregister_driver(&apple_bl_driver);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+EXPORT_SYMBOL_GPL(apple_bl_unregister);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
static int __init apple_bl_init(void)
|
|
Matthew Garrett |
f1d2f5d |
{
|
|
Matthew Garrett |
f1d2f5d |
- return acpi_bus_register_driver(&apple_bl_driver);
|
|
Matthew Garrett |
f1d2f5d |
+ return apple_bl_register();
|
|
Matthew Garrett |
f1d2f5d |
}
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
static void __exit apple_bl_exit(void)
|
|
Matthew Garrett |
f1d2f5d |
{
|
|
Matthew Garrett |
f1d2f5d |
- acpi_bus_unregister_driver(&apple_bl_driver);
|
|
Matthew Garrett |
f1d2f5d |
+ apple_bl_unregister();
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|
Matthew Garrett |
f1d2f5d |
}
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
module_init(apple_bl_init);
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|
Matthew Garrett |
f1d2f5d |
diff --git a/include/linux/apple_bl.h b/include/linux/apple_bl.h
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|
Matthew Garrett |
f1d2f5d |
new file mode 100644
|
|
Matthew Garrett |
f1d2f5d |
index 0000000..47bedc0
|
|
Matthew Garrett |
f1d2f5d |
--- /dev/null
|
|
Matthew Garrett |
f1d2f5d |
+++ b/include/linux/apple_bl.h
|
|
Matthew Garrett |
f1d2f5d |
@@ -0,0 +1,26 @@
|
|
Matthew Garrett |
f1d2f5d |
+/*
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|
Matthew Garrett |
f1d2f5d |
+ * apple_bl exported symbols
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#ifndef _LINUX_APPLE_BL_H
|
|
Matthew Garrett |
f1d2f5d |
+#define _LINUX_APPLE_BL_H
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#ifdef CONFIG_BACKLIGHT_APPLE
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+extern int apple_bl_register(void);
|
|
Matthew Garrett |
f1d2f5d |
+extern void apple_bl_unregister(void);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#else /* !CONFIG_BACKLIGHT_APPLE */
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static inline int apple_bl_register(void)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ return 0;
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
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|
Matthew Garrett |
f1d2f5d |
+static inline void apple_bl_unregister(void)
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|
Matthew Garrett |
f1d2f5d |
+{
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|
Matthew Garrett |
f1d2f5d |
+}
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|
Matthew Garrett |
f1d2f5d |
+
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|
Matthew Garrett |
f1d2f5d |
+#endif /* !CONFIG_BACKLIGHT_APPLE */
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|
Matthew Garrett |
f1d2f5d |
+
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|
Matthew Garrett |
f1d2f5d |
+#endif /* _LINUX_APPLE_BL_H */
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|
Matthew Garrett |
f1d2f5d |
commit 89c093937dc8b07db4652251c83ec3710e5f15a2
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|
Matthew Garrett |
f1d2f5d |
Author: Seth Forshee <seth.forshee@canonical.com>
|
|
Matthew Garrett |
f1d2f5d |
Date: Fri Mar 16 14:41:22 2012 -0500
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|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
platform/x86: Add driver for Apple gmux device
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
Apple laptops with hybrid graphics have a device named gmux that
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|
Matthew Garrett |
f1d2f5d |
controls the muxing of the LVDS panel between the GPUs as well as screen
|
|
Matthew Garrett |
f1d2f5d |
brightness. This driver adds support for the gmux device. Only backlight
|
|
Matthew Garrett |
f1d2f5d |
control is supported initially.
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
|
|
Matthew Garrett |
f1d2f5d |
Signed-off-by: Matthew Garrett <mjg@redhat.com>
|
|
Matthew Garrett |
f1d2f5d |
Tested-by: Grant Likely <grant.likely@secretlab.ca>
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
|
|
Matthew Garrett |
f1d2f5d |
index ce10f03..c5b4bfe 100644
|
|
Matthew Garrett |
f1d2f5d |
--- a/drivers/platform/x86/Kconfig
|
|
Matthew Garrett |
f1d2f5d |
+++ b/drivers/platform/x86/Kconfig
|
|
Matthew Garrett |
f1d2f5d |
@@ -752,4 +752,14 @@ config SAMSUNG_Q10
|
|
Matthew Garrett |
f1d2f5d |
This driver provides support for backlight control on Samsung Q10
|
|
Matthew Garrett |
f1d2f5d |
and related laptops, including Dell Latitude X200.
|
|
Matthew Garrett |
f1d2f5d |
|
|
Matthew Garrett |
f1d2f5d |
+config APPLE_GMUX
|
|
Matthew Garrett |
f1d2f5d |
+ tristate "Apple Gmux Driver"
|
|
Matthew Garrett |
f1d2f5d |
+ depends on PNP
|
|
Matthew Garrett |
f1d2f5d |
+ select BACKLIGHT_CLASS_DEVICE
|
|
Matthew Garrett |
f1d2f5d |
+ ---help---
|
|
Matthew Garrett |
f1d2f5d |
+ This driver provides support for the gmux device found on many
|
|
Matthew Garrett |
f1d2f5d |
+ Apple laptops, which controls the display mux for the hybrid
|
|
Matthew Garrett |
f1d2f5d |
+ graphics as well as the backlight. Currently only backlight
|
|
Matthew Garrett |
f1d2f5d |
+ control is supported by the driver.
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|
Matthew Garrett |
f1d2f5d |
+
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|
Matthew Garrett |
f1d2f5d |
endif # X86_PLATFORM_DEVICES
|
|
Matthew Garrett |
f1d2f5d |
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
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|
Matthew Garrett |
f1d2f5d |
index dcfee6b..bf7e4f9 100644
|
|
Matthew Garrett |
f1d2f5d |
--- a/drivers/platform/x86/Makefile
|
|
Matthew Garrett |
f1d2f5d |
+++ b/drivers/platform/x86/Makefile
|
|
Matthew Garrett |
f1d2f5d |
@@ -49,3 +49,4 @@ obj-$(CONFIG_MXM_WMI) += mxm-wmi.o
|
|
Matthew Garrett |
f1d2f5d |
obj-$(CONFIG_INTEL_MID_POWER_BUTTON) += intel_mid_powerbtn.o
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|
Matthew Garrett |
f1d2f5d |
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
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|
Matthew Garrett |
f1d2f5d |
obj-$(CONFIG_SAMSUNG_Q10) += samsung-q10.o
|
|
Matthew Garrett |
f1d2f5d |
+obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o
|
|
Matthew Garrett |
f1d2f5d |
diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
|
|
Matthew Garrett |
f1d2f5d |
new file mode 100644
|
|
Matthew Garrett |
f1d2f5d |
index 0000000..c81e31f
|
|
Matthew Garrett |
f1d2f5d |
--- /dev/null
|
|
Matthew Garrett |
f1d2f5d |
+++ b/drivers/platform/x86/apple-gmux.c
|
|
Matthew Garrett |
f1d2f5d |
@@ -0,0 +1,242 @@
|
|
Matthew Garrett |
f1d2f5d |
+/*
|
|
Matthew Garrett |
f1d2f5d |
+ * Gmux driver for Apple laptops
|
|
Matthew Garrett |
f1d2f5d |
+ *
|
|
Matthew Garrett |
f1d2f5d |
+ * Copyright (C) Canonical Ltd. <seth.forshee@canonical.com>
|
|
Matthew Garrett |
f1d2f5d |
+ *
|
|
Matthew Garrett |
f1d2f5d |
+ * This program is free software; you can redistribute it and/or modify
|
|
Matthew Garrett |
f1d2f5d |
+ * it under the terms of the GNU General Public License version 2 as
|
|
Matthew Garrett |
f1d2f5d |
+ * published by the Free Software Foundation.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/module.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/kernel.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/init.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/backlight.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/acpi.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/pnp.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <linux/apple_bl.h>
|
|
Matthew Garrett |
f1d2f5d |
+#include <acpi/video.h>
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+struct apple_gmux_data {
|
|
Matthew Garrett |
f1d2f5d |
+ unsigned long iostart;
|
|
Matthew Garrett |
f1d2f5d |
+ unsigned long iolen;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ struct backlight_device *bdev;
|
|
Matthew Garrett |
f1d2f5d |
+};
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+/*
|
|
Matthew Garrett |
f1d2f5d |
+ * gmux port offsets. Many of these are not yet used, but may be in the
|
|
Matthew Garrett |
f1d2f5d |
+ * future, and it's useful to have them documented here anyhow.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_VERSION_MAJOR 0x04
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_VERSION_MINOR 0x05
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_VERSION_RELEASE 0x06
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_SWITCH_DISPLAY 0x10
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_SWITCH_GET_DISPLAY 0x11
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_INTERRUPT_ENABLE 0x14
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_INTERRUPT_STATUS 0x16
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_SWITCH_DDC 0x28
|
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Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_SWITCH_EXTERNAL 0x40
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_SWITCH_GET_EXTERNAL 0x41
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_DISCRETE_POWER 0x50
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_MAX_BRIGHTNESS 0x70
|
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Matthew Garrett |
f1d2f5d |
+#define GMUX_PORT_BRIGHTNESS 0x74
|
|
Matthew Garrett |
f1d2f5d |
+
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Matthew Garrett |
f1d2f5d |
+#define GMUX_MIN_IO_LEN (GMUX_PORT_BRIGHTNESS + 4)
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|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_ENABLE 0xff
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_DISABLE 0x00
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_STATUS_ACTIVE 0
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_STATUS_DISPLAY (1 << 0)
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_STATUS_POWER (1 << 2)
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_INTERRUPT_STATUS_HOTPLUG (1 << 3)
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_BRIGHTNESS_MASK 0x00ffffff
|
|
Matthew Garrett |
f1d2f5d |
+#define GMUX_MAX_BRIGHTNESS GMUX_BRIGHTNESS_MASK
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static inline u8 gmux_read8(struct apple_gmux_data *gmux_data, int port)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ return inb(gmux_data->iostart + port);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static inline void gmux_write8(struct apple_gmux_data *gmux_data, int port,
|
|
Matthew Garrett |
f1d2f5d |
+ u8 val)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ outb(val, gmux_data->iostart + port);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static inline u32 gmux_read32(struct apple_gmux_data *gmux_data, int port)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ return inl(gmux_data->iostart + port);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static int gmux_get_brightness(struct backlight_device *bd)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ struct apple_gmux_data *gmux_data = bl_get_data(bd);
|
|
Matthew Garrett |
f1d2f5d |
+ return gmux_read32(gmux_data, GMUX_PORT_BRIGHTNESS) &
|
|
Matthew Garrett |
f1d2f5d |
+ GMUX_BRIGHTNESS_MASK;
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static int gmux_update_status(struct backlight_device *bd)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ struct apple_gmux_data *gmux_data = bl_get_data(bd);
|
|
Matthew Garrett |
f1d2f5d |
+ u32 brightness = bd->props.brightness;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ /*
|
|
Matthew Garrett |
f1d2f5d |
+ * Older gmux versions require writing out lower bytes first then
|
|
Matthew Garrett |
f1d2f5d |
+ * setting the upper byte to 0 to flush the values. Newer versions
|
|
Matthew Garrett |
f1d2f5d |
+ * accept a single u32 write, but the old method also works, so we
|
|
Matthew Garrett |
f1d2f5d |
+ * just use the old method for all gmux versions.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS, brightness);
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 1, brightness >> 8);
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 2, brightness >> 16);
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 3, 0);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ return 0;
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static const struct backlight_ops gmux_bl_ops = {
|
|
Matthew Garrett |
f1d2f5d |
+ .get_brightness = gmux_get_brightness,
|
|
Matthew Garrett |
f1d2f5d |
+ .update_status = gmux_update_status,
|
|
Matthew Garrett |
f1d2f5d |
+};
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static int __devinit gmux_probe(struct pnp_dev *pnp,
|
|
Matthew Garrett |
f1d2f5d |
+ const struct pnp_device_id *id)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ struct apple_gmux_data *gmux_data;
|
|
Matthew Garrett |
f1d2f5d |
+ struct resource *res;
|
|
Matthew Garrett |
f1d2f5d |
+ struct backlight_properties props;
|
|
Matthew Garrett |
f1d2f5d |
+ struct backlight_device *bdev;
|
|
Matthew Garrett |
f1d2f5d |
+ u8 ver_major, ver_minor, ver_release;
|
|
Matthew Garrett |
f1d2f5d |
+ int ret = -ENXIO;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data = kzalloc(sizeof(*gmux_data), GFP_KERNEL);
|
|
Matthew Garrett |
f1d2f5d |
+ if (!gmux_data)
|
|
Matthew Garrett |
f1d2f5d |
+ return -ENOMEM;
|
|
Matthew Garrett |
f1d2f5d |
+ pnp_set_drvdata(pnp, gmux_data);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ res = pnp_get_resource(pnp, IORESOURCE_IO, 0);
|
|
Matthew Garrett |
f1d2f5d |
+ if (!res) {
|
|
Matthew Garrett |
f1d2f5d |
+ pr_err("Failed to find gmux I/O resource\n");
|
|
Matthew Garrett |
f1d2f5d |
+ goto err_free;
|
|
Matthew Garrett |
f1d2f5d |
+ }
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data->iostart = res->start;
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data->iolen = res->end - res->start;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ if (gmux_data->iolen < GMUX_MIN_IO_LEN) {
|
|
Matthew Garrett |
f1d2f5d |
+ pr_err("gmux I/O region too small (%lu < %u)\n",
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data->iolen, GMUX_MIN_IO_LEN);
|
|
Matthew Garrett |
f1d2f5d |
+ goto err_free;
|
|
Matthew Garrett |
f1d2f5d |
+ }
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ if (!request_region(gmux_data->iostart, gmux_data->iolen,
|
|
Matthew Garrett |
f1d2f5d |
+ "Apple gmux")) {
|
|
Matthew Garrett |
f1d2f5d |
+ pr_err("gmux I/O already in use\n");
|
|
Matthew Garrett |
f1d2f5d |
+ goto err_free;
|
|
Matthew Garrett |
f1d2f5d |
+ }
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ /*
|
|
Matthew Garrett |
f1d2f5d |
+ * On some machines the gmux is in ACPI even thought the machine
|
|
Matthew Garrett |
f1d2f5d |
+ * doesn't really have a gmux. Check for invalid version information
|
|
Matthew Garrett |
f1d2f5d |
+ * to detect this.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+ ver_major = gmux_read8(gmux_data, GMUX_PORT_VERSION_MAJOR);
|
|
Matthew Garrett |
f1d2f5d |
+ ver_minor = gmux_read8(gmux_data, GMUX_PORT_VERSION_MINOR);
|
|
Matthew Garrett |
f1d2f5d |
+ ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);
|
|
Matthew Garrett |
f1d2f5d |
+ if (ver_major == 0xff && ver_minor == 0xff && ver_release == 0xff) {
|
|
Matthew Garrett |
f1d2f5d |
+ pr_info("gmux device not present\n");
|
|
Matthew Garrett |
f1d2f5d |
+ ret = -ENODEV;
|
|
Matthew Garrett |
f1d2f5d |
+ goto err_release;
|
|
Matthew Garrett |
f1d2f5d |
+ }
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ pr_info("Found gmux version %d.%d.%d\n", ver_major, ver_minor,
|
|
Matthew Garrett |
f1d2f5d |
+ ver_release);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ memset(&props, 0, sizeof(props));
|
|
Matthew Garrett |
f1d2f5d |
+ props.type = BACKLIGHT_PLATFORM;
|
|
Matthew Garrett |
f1d2f5d |
+ props.max_brightness = gmux_read32(gmux_data, GMUX_PORT_MAX_BRIGHTNESS);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ /*
|
|
Matthew Garrett |
f1d2f5d |
+ * Currently it's assumed that the maximum brightness is less than
|
|
Matthew Garrett |
f1d2f5d |
+ * 2^24 for compatibility with old gmux versions. Cap the max
|
|
Matthew Garrett |
f1d2f5d |
+ * brightness at this value, but print a warning if the hardware
|
|
Matthew Garrett |
f1d2f5d |
+ * reports something higher so that it can be fixed.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+ if (WARN_ON(props.max_brightness > GMUX_MAX_BRIGHTNESS))
|
|
Matthew Garrett |
f1d2f5d |
+ props.max_brightness = GMUX_MAX_BRIGHTNESS;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ bdev = backlight_device_register("gmux_backlight", &pnp->dev,
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data, &gmux_bl_ops, &props;;
|
|
Matthew Garrett |
f1d2f5d |
+ if (IS_ERR(bdev)) {
|
|
Matthew Garrett |
f1d2f5d |
+ ret = PTR_ERR(bdev);
|
|
Matthew Garrett |
f1d2f5d |
+ goto err_release;
|
|
Matthew Garrett |
f1d2f5d |
+ }
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ gmux_data->bdev = bdev;
|
|
Matthew Garrett |
f1d2f5d |
+ bdev->props.brightness = gmux_get_brightness(bdev);
|
|
Matthew Garrett |
f1d2f5d |
+ backlight_update_status(bdev);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ /*
|
|
Matthew Garrett |
f1d2f5d |
+ * The backlight situation on Macs is complicated. If the gmux is
|
|
Matthew Garrett |
f1d2f5d |
+ * present it's the best choice, because it always works for
|
|
Matthew Garrett |
f1d2f5d |
+ * backlight control and supports more levels than other options.
|
|
Matthew Garrett |
f1d2f5d |
+ * Disable the other backlight choices.
|
|
Matthew Garrett |
f1d2f5d |
+ */
|
|
Matthew Garrett |
f1d2f5d |
+ acpi_video_unregister();
|
|
Matthew Garrett |
f1d2f5d |
+ apple_bl_unregister();
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ return 0;
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+err_release:
|
|
Matthew Garrett |
f1d2f5d |
+ release_region(gmux_data->iostart, gmux_data->iolen);
|
|
Matthew Garrett |
f1d2f5d |
+err_free:
|
|
Matthew Garrett |
f1d2f5d |
+ kfree(gmux_data);
|
|
Matthew Garrett |
f1d2f5d |
+ return ret;
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static void __devexit gmux_remove(struct pnp_dev *pnp)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ backlight_device_unregister(gmux_data->bdev);
|
|
Matthew Garrett |
f1d2f5d |
+ release_region(gmux_data->iostart, gmux_data->iolen);
|
|
Matthew Garrett |
f1d2f5d |
+ kfree(gmux_data);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+ acpi_video_register();
|
|
Matthew Garrett |
f1d2f5d |
+ apple_bl_register();
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static const struct pnp_device_id gmux_device_ids[] = {
|
|
Matthew Garrett |
f1d2f5d |
+ {"APP000B", 0},
|
|
Matthew Garrett |
f1d2f5d |
+ {"", 0}
|
|
Matthew Garrett |
f1d2f5d |
+};
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static struct pnp_driver gmux_pnp_driver = {
|
|
Matthew Garrett |
f1d2f5d |
+ .name = "apple-gmux",
|
|
Matthew Garrett |
f1d2f5d |
+ .probe = gmux_probe,
|
|
Matthew Garrett |
f1d2f5d |
+ .remove = __devexit_p(gmux_remove),
|
|
Matthew Garrett |
f1d2f5d |
+ .id_table = gmux_device_ids,
|
|
Matthew Garrett |
f1d2f5d |
+};
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static int __init apple_gmux_init(void)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ return pnp_register_driver(&gmux_pnp_driver);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+static void __exit apple_gmux_exit(void)
|
|
Matthew Garrett |
f1d2f5d |
+{
|
|
Matthew Garrett |
f1d2f5d |
+ pnp_unregister_driver(&gmux_pnp_driver);
|
|
Matthew Garrett |
f1d2f5d |
+}
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+module_init(apple_gmux_init);
|
|
Matthew Garrett |
f1d2f5d |
+module_exit(apple_gmux_exit);
|
|
Matthew Garrett |
f1d2f5d |
+
|
|
Matthew Garrett |
f1d2f5d |
+MODULE_AUTHOR("Seth Forshee <seth.forshee@canonical.com>");
|
|
Matthew Garrett |
f1d2f5d |
+MODULE_DESCRIPTION("Apple Gmux Driver");
|
|
Matthew Garrett |
f1d2f5d |
+MODULE_LICENSE("GPL");
|
|
Matthew Garrett |
f1d2f5d |
+MODULE_DEVICE_TABLE(pnp, gmux_device_ids);
|