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kernel/apple_backlight.patch

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Various fixes to the Apple backlight driver. Upstream in .38?
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index e54a337..fb5df46 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -236,12 +236,12 @@ config BACKLIGHT_MAX8925
If you have a LCD backlight connected to the WLED output of MAX8925
WLED output, say Y here to enable this driver.
-config BACKLIGHT_MBP_NVIDIA
- tristate "MacBook Pro Nvidia Backlight Driver"
+config BACKLIGHT_APPLE
+ tristate "Apple Backlight Driver"
depends on X86
help
- If you have an Apple Macbook Pro with Nvidia graphics hardware say Y
- to enable a driver for its backlight
+ If you have an Intel-based Apple say Y to enable a driver for its
+ backlight
config BACKLIGHT_TOSA
tristate "Sharp SL-6000 Backlight Driver"
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 44c0f81..ebaecc0 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o
obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o
obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o
-obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o
+obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o
obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o
obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
diff --git a/drivers/video/backlight/apple_bl.c b/drivers/video/backlight/apple_bl.c
new file mode 100644
index 0000000..8f808c7
--- /dev/null
+++ b/drivers/video/backlight/apple_bl.c
@@ -0,0 +1,240 @@
+/*
+ * Backlight Driver for Intel-based Apples
+ *
+ * Copyright (c) Red Hat <mjg@redhat.com>
+ * Based on code from Pommed:
+ * Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
+ * Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
+ * Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver triggers SMIs which cause the firmware to change the
+ * backlight brightness. This is icky in many ways, but it's impractical to
+ * get at the firmware code in order to figure out what it's actually doing.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/acpi.h>
+
+static struct backlight_device *apple_backlight_device;
+
+struct hw_data {
+ /* I/O resource to allocate. */
+ unsigned long iostart;
+ unsigned long iolen;
+ /* Backlight operations structure. */
+ const struct backlight_ops backlight_ops;
+ void (*set_brightness)(int);
+};
+
+static const struct hw_data *hw_data;
+
+#define DRIVER "apple_backlight: "
+
+/* Module parameters. */
+static int debug;
+module_param_named(debug, debug, int, 0644);
+MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
+
+/*
+ * Implementation for machines with Intel chipset.
+ */
+static void intel_chipset_set_brightness(int intensity)
+{
+ outb(0x04 | (intensity << 4), 0xb3);
+ outb(0xbf, 0xb2);
+}
+
+static int intel_chipset_send_intensity(struct backlight_device *bd)
+{
+ int intensity = bd->props.brightness;
+
+ if (debug)
+ printk(KERN_DEBUG DRIVER "setting brightness to %d\n",
+ intensity);
+
+ intel_chipset_set_brightness(intensity);
+ return 0;
+}
+
+static int intel_chipset_get_intensity(struct backlight_device *bd)
+{
+ int intensity;
+
+ outb(0x03, 0xb3);
+ outb(0xbf, 0xb2);
+ intensity = inb(0xb3) >> 4;
+
+ if (debug)
+ printk(KERN_DEBUG DRIVER "read brightness of %d\n",
+ intensity);
+
+ return intensity;
+}
+
+static const struct hw_data intel_chipset_data = {
+ .iostart = 0xb2,
+ .iolen = 2,
+ .backlight_ops = {
+ .options = BL_CORE_SUSPENDRESUME,
+ .get_brightness = intel_chipset_get_intensity,
+ .update_status = intel_chipset_send_intensity,
+ },
+ .set_brightness = intel_chipset_set_brightness,
+};
+
+/*
+ * Implementation for machines with Nvidia chipset.
+ */
+static void nvidia_chipset_set_brightness(int intensity)
+{
+ outb(0x04 | (intensity << 4), 0x52f);
+ outb(0xbf, 0x52e);
+}
+
+static int nvidia_chipset_send_intensity(struct backlight_device *bd)
+{
+ int intensity = bd->props.brightness;
+
+ if (debug)
+ printk(KERN_DEBUG DRIVER "setting brightness to %d\n",
+ intensity);
+
+ nvidia_chipset_set_brightness(intensity);
+ return 0;
+}
+
+static int nvidia_chipset_get_intensity(struct backlight_device *bd)
+{
+ int intensity;
+
+ outb(0x03, 0x52f);
+ outb(0xbf, 0x52e);
+ intensity = inb(0x52f) >> 4;
+
+ if (debug)
+ printk(KERN_DEBUG DRIVER "read brightness of %d\n",
+ intensity);
+
+ return intensity;
+}
+
+static const struct hw_data nvidia_chipset_data = {
+ .iostart = 0x52e,
+ .iolen = 2,
+ .backlight_ops = {
+ .options = BL_CORE_SUSPENDRESUME,
+ .get_brightness = nvidia_chipset_get_intensity,
+ .update_status = nvidia_chipset_send_intensity
+ },
+ .set_brightness = nvidia_chipset_set_brightness,
+};
+
+static int __devinit apple_bl_add(struct acpi_device *dev)
+{
+ struct backlight_properties props;
+ struct pci_dev *host;
+ int intensity;
+
+ host = pci_get_bus_and_slot(0, 0);
+
+ if (!host) {
+ printk(KERN_ERR DRIVER "unable to find PCI host\n");
+ return -ENODEV;
+ }
+
+ if (host->vendor == PCI_VENDOR_ID_INTEL)
+ hw_data = &intel_chipset_data;
+ else if (host->vendor == PCI_VENDOR_ID_NVIDIA)
+ hw_data = &nvidia_chipset_data;
+
+ pci_dev_put(host);
+
+ if (!hw_data) {
+ printk(KERN_ERR DRIVER "unknown hardware\n");
+ return -ENODEV;
+ }
+
+ /* Check that the hardware responds - this may not work under EFI */
+
+ intensity = hw_data->backlight_ops.get_brightness(NULL);
+
+ if (!intensity) {
+ hw_data->set_brightness(1);
+ if (!hw_data->backlight_ops.get_brightness(NULL))
+ return -ENODEV;
+
+ hw_data->set_brightness(0);
+ }
+
+ if (!request_region(hw_data->iostart, hw_data->iolen,
+ "Apple backlight"))
+ return -ENXIO;
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 15;
+ apple_backlight_device = backlight_device_register("apple_backlight",
+ NULL, NULL, &hw_data->backlight_ops, &props);
+
+ if (IS_ERR(apple_backlight_device)) {
+ release_region(hw_data->iostart, hw_data->iolen);
+ return PTR_ERR(apple_backlight_device);
+ }
+
+ apple_backlight_device->props.brightness =
+ hw_data->backlight_ops.get_brightness(apple_backlight_device);
+ backlight_update_status(apple_backlight_device);
+
+ return 0;
+}
+
+static int __devexit apple_bl_remove(struct acpi_device *dev, int type)
+{
+ backlight_device_unregister(apple_backlight_device);
+
+ release_region(hw_data->iostart, hw_data->iolen);
+ hw_data = NULL;
+ return 0;
+}
+
+static const struct acpi_device_id apple_bl_ids[] = {
+ {"APP0002", 0},
+ {"", 0},
+};
+
+static struct acpi_driver apple_bl_driver = {
+ .name = "Apple backlight",
+ .ids = apple_bl_ids,
+ .ops = {
+ .add = apple_bl_add,
+ .remove = apple_bl_remove,
+ },
+};
+
+static int __init apple_bl_init(void)
+{
+ return acpi_bus_register_driver(&apple_bl_driver);
+}
+
+static void __exit apple_bl_exit(void)
+{
+ acpi_bus_unregister_driver(&apple_bl_driver);
+}
+
+module_init(apple_bl_init);
+module_exit(apple_bl_exit);
+
+MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
+MODULE_DESCRIPTION("Apple Backlight Driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(acpi, apple_bl_ids);
+MODULE_ALIAS("mbp_nvidia_bl");
diff --git a/drivers/video/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c
deleted file mode 100644
index 1485f73..0000000
--- a/drivers/video/backlight/mbp_nvidia_bl.c
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * Backlight Driver for Nvidia 8600 in Macbook Pro
- *
- * Copyright (c) Red Hat <mjg@redhat.com>
- * Based on code from Pommed:
- * Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
- * Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
- * Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This driver triggers SMIs which cause the firmware to change the
- * backlight brightness. This is icky in many ways, but it's impractical to
- * get at the firmware code in order to figure out what it's actually doing.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/backlight.h>
-#include <linux/err.h>
-#include <linux/dmi.h>
-#include <linux/io.h>
-
-static struct backlight_device *mbp_backlight_device;
-
-/* Structure to be passed to the DMI_MATCH function. */
-struct dmi_match_data {
- /* I/O resource to allocate. */
- unsigned long iostart;
- unsigned long iolen;
- /* Backlight operations structure. */
- const struct backlight_ops backlight_ops;
-};
-
-/* Module parameters. */
-static int debug;
-module_param_named(debug, debug, int, 0644);
-MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
-
-/*
- * Implementation for MacBooks with Intel chipset.
- */
-static int intel_chipset_send_intensity(struct backlight_device *bd)
-{
- int intensity = bd->props.brightness;
-
- if (debug)
- printk(KERN_DEBUG "mbp_nvidia_bl: setting brightness to %d\n",
- intensity);
-
- outb(0x04 | (intensity << 4), 0xb3);
- outb(0xbf, 0xb2);
- return 0;
-}
-
-static int intel_chipset_get_intensity(struct backlight_device *bd)
-{
- int intensity;
-
- outb(0x03, 0xb3);
- outb(0xbf, 0xb2);
- intensity = inb(0xb3) >> 4;
-
- if (debug)
- printk(KERN_DEBUG "mbp_nvidia_bl: read brightness of %d\n",
- intensity);
-
- return intensity;
-}
-
-static const struct dmi_match_data intel_chipset_data = {
- .iostart = 0xb2,
- .iolen = 2,
- .backlight_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .get_brightness = intel_chipset_get_intensity,
- .update_status = intel_chipset_send_intensity,
- }
-};
-
-/*
- * Implementation for MacBooks with Nvidia chipset.
- */
-static int nvidia_chipset_send_intensity(struct backlight_device *bd)
-{
- int intensity = bd->props.brightness;
-
- if (debug)
- printk(KERN_DEBUG "mbp_nvidia_bl: setting brightness to %d\n",
- intensity);
-
- outb(0x04 | (intensity << 4), 0x52f);
- outb(0xbf, 0x52e);
- return 0;
-}
-
-static int nvidia_chipset_get_intensity(struct backlight_device *bd)
-{
- int intensity;
-
- outb(0x03, 0x52f);
- outb(0xbf, 0x52e);
- intensity = inb(0x52f) >> 4;
-
- if (debug)
- printk(KERN_DEBUG "mbp_nvidia_bl: read brightness of %d\n",
- intensity);
-
- return intensity;
-}
-
-static const struct dmi_match_data nvidia_chipset_data = {
- .iostart = 0x52e,
- .iolen = 2,
- .backlight_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .get_brightness = nvidia_chipset_get_intensity,
- .update_status = nvidia_chipset_send_intensity
- }
-};
-
-/*
- * DMI matching.
- */
-static /* const */ struct dmi_match_data *driver_data;
-
-static int mbp_dmi_match(const struct dmi_system_id *id)
-{
- driver_data = id->driver_data;
-
- printk(KERN_INFO "mbp_nvidia_bl: %s detected\n", id->ident);
- return 1;
-}
-
-static const struct dmi_system_id __initdata mbp_device_table[] = {
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 1,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 2,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook2,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 3,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook3,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 4,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook4,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 4,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook4,2"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 1,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 1,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,2"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 2,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 2,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,2"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 3,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 3,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,2"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 4,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookAir 1,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir1,1"),
- },
- .driver_data = (void *)&intel_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 5,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,1"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 5,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,2"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBook 6,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook6,1"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookAir 2,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir2,1"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 5,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,1"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 5,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,2"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 5,3",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,3"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 5,4",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,4"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookPro 5,5",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,5"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookAir 3,1",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir3,1"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- {
- .callback = mbp_dmi_match,
- .ident = "MacBookAir 3,2",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir3,2"),
- },
- .driver_data = (void *)&nvidia_chipset_data,
- },
- { }
-};
-
-static int __init mbp_init(void)
-{
- struct backlight_properties props;
- if (!dmi_check_system(mbp_device_table))
- return -ENODEV;
-
- if (!request_region(driver_data->iostart, driver_data->iolen,
- "Macbook Pro backlight"))
- return -ENXIO;
-
- memset(&props, 0, sizeof(struct backlight_properties));
- props.max_brightness = 15;
- mbp_backlight_device = backlight_device_register("mbp_backlight", NULL,
- NULL,
- &driver_data->backlight_ops,
- &props);
- if (IS_ERR(mbp_backlight_device)) {
- release_region(driver_data->iostart, driver_data->iolen);
- return PTR_ERR(mbp_backlight_device);
- }
-
- mbp_backlight_device->props.brightness =
- driver_data->backlight_ops.get_brightness(mbp_backlight_device);
- backlight_update_status(mbp_backlight_device);
-
- return 0;
-}
-
-static void __exit mbp_exit(void)
-{
- backlight_device_unregister(mbp_backlight_device);
-
- release_region(driver_data->iostart, driver_data->iolen);
-}
-
-module_init(mbp_init);
-module_exit(mbp_exit);
-
-MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
-MODULE_DESCRIPTION("Nvidia-based Macbook Pro Backlight Driver");
-MODULE_LICENSE("GPL");
-MODULE_DEVICE_TABLE(dmi, mbp_device_table);
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