video.c 48.4 KB
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/*
 *  video.c - ACPI Video Driver ($Revision:$)
 *
 *  Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
 *  Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

#include <asm/uaccess.h>

#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_VIDEO_COMPONENT		0x08000000
#define ACPI_VIDEO_CLASS		"video"
#define ACPI_VIDEO_DRIVER_NAME		"ACPI Video Driver"
#define ACPI_VIDEO_BUS_NAME		"Video Bus"
#define ACPI_VIDEO_DEVICE_NAME		"Video Device"
#define ACPI_VIDEO_NOTIFY_SWITCH	0x80
#define ACPI_VIDEO_NOTIFY_PROBE		0x81
#define ACPI_VIDEO_NOTIFY_CYCLE		0x82
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT	0x83
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT	0x84

#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS	0x82
#define	ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS	0x83
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS	0x84
#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS	0x85
#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF		0x86

#define ACPI_VIDEO_HEAD_INVALID		(~0u - 1)
#define ACPI_VIDEO_HEAD_END		(~0u)

#define _COMPONENT		ACPI_VIDEO_COMPONENT
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ACPI_MODULE_NAME("acpi_video")
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    MODULE_AUTHOR("Bruno Ducrot");
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MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
MODULE_LICENSE("GPL");

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static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device, int type);
static int acpi_video_bus_match(struct acpi_device *device,
				struct acpi_driver *driver);
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static struct acpi_driver acpi_video_bus = {
	.name = ACPI_VIDEO_DRIVER_NAME,
	.class = ACPI_VIDEO_CLASS,
	.ops = {
		.add = acpi_video_bus_add,
		.remove = acpi_video_bus_remove,
		.match = acpi_video_bus_match,
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		},
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};

struct acpi_video_bus_flags {
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	u8 multihead:1;		/* can switch video heads */
	u8 rom:1;		/* can retrieve a video rom */
	u8 post:1;		/* can configure the head to */
	u8 reserved:5;
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};

struct acpi_video_bus_cap {
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	u8 _DOS:1;		/*Enable/Disable output switching */
	u8 _DOD:1;		/*Enumerate all devices attached to display adapter */
	u8 _ROM:1;		/*Get ROM Data */
	u8 _GPD:1;		/*Get POST Device */
	u8 _SPD:1;		/*Set POST Device */
	u8 _VPO:1;		/*Video POST Options */
	u8 reserved:2;
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};

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struct acpi_video_device_attrib {
	u32 display_index:4;	/* A zero-based instance of the Display */
	u32 display_port_attachment:4;	/*This field differenates displays type */
	u32 display_type:4;	/*Describe the specific type in use */
	u32 vendor_specific:4;	/*Chipset Vendor Specifi */
	u32 bios_can_detect:1;	/*BIOS can detect the device */
	u32 depend_on_vga:1;	/*Non-VGA output device whose power is related to 
				   the VGA device. */
	u32 pipe_id:3;		/*For VGA multiple-head devices. */
	u32 reserved:10;	/*Must be 0 */
	u32 device_id_scheme:1;	/*Device ID Scheme */
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};

struct acpi_video_enumerated_device {
	union {
		u32 int_val;
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		struct acpi_video_device_attrib attrib;
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	} value;
	struct acpi_video_device *bind_info;
};

struct acpi_video_bus {
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	acpi_handle handle;
	u8 dos_setting;
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	struct acpi_video_enumerated_device *attached_array;
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	u8 attached_count;
	struct acpi_video_bus_cap cap;
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	struct acpi_video_bus_flags flags;
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	struct semaphore sem;
	struct list_head video_device_list;
	struct proc_dir_entry *dir;
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};

struct acpi_video_device_flags {
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	u8 crt:1;
	u8 lcd:1;
	u8 tvout:1;
	u8 bios:1;
	u8 unknown:1;
	u8 reserved:3;
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};

struct acpi_video_device_cap {
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	u8 _ADR:1;		/*Return the unique ID */
	u8 _BCL:1;		/*Query list of brightness control levels supported */
	u8 _BCM:1;		/*Set the brightness level */
	u8 _DDC:1;		/*Return the EDID for this device */
	u8 _DCS:1;		/*Return status of output device */
	u8 _DGS:1;		/*Query graphics state */
	u8 _DSS:1;		/*Device state set */
	u8 _reserved:1;
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};

struct acpi_video_device_brightness {
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	int curr;
	int count;
	int *levels;
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};

struct acpi_video_device {
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	acpi_handle handle;
	unsigned long device_id;
	struct acpi_video_device_flags flags;
	struct acpi_video_device_cap cap;
	struct list_head entry;
	struct acpi_video_bus *video;
	struct acpi_device *dev;
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	struct acpi_video_device_brightness *brightness;
};

/* bus */
static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_info_fops = {
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	.open = acpi_video_bus_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_ROM_fops = {
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	.open = acpi_video_bus_ROM_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

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static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
					    struct file *file);
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static struct file_operations acpi_video_bus_POST_info_fops = {
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	.open = acpi_video_bus_POST_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_POST_fops = {
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	.open = acpi_video_bus_POST_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_DOS_fops = {
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	.open = acpi_video_bus_DOS_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

/* device */
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static int acpi_video_device_info_open_fs(struct inode *inode,
					  struct file *file);
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static struct file_operations acpi_video_device_info_fops = {
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	.open = acpi_video_device_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

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static int acpi_video_device_state_open_fs(struct inode *inode,
					   struct file *file);
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static struct file_operations acpi_video_device_state_fops = {
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	.open = acpi_video_device_state_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

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static int acpi_video_device_brightness_open_fs(struct inode *inode,
						struct file *file);
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static struct file_operations acpi_video_device_brightness_fops = {
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	.open = acpi_video_device_brightness_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

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static int acpi_video_device_EDID_open_fs(struct inode *inode,
					  struct file *file);
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static struct file_operations acpi_video_device_EDID_fops = {
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	.open = acpi_video_device_EDID_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
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};

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static char device_decode[][30] = {
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	"motherboard VGA device",
	"PCI VGA device",
	"AGP VGA device",
	"UNKNOWN",
};

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static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
static void acpi_video_device_rebind(struct acpi_video_bus *video);
static void acpi_video_device_bind(struct acpi_video_bus *video,
				   struct acpi_video_device *device);
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static int acpi_video_device_enumerate(struct acpi_video_bus *video);
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static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
static int acpi_video_get_next_level(struct acpi_video_device *device,
				     u32 level_current, u32 event);
static void acpi_video_switch_brightness(struct acpi_video_device *device,
					 int event);
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/* --------------------------------------------------------------------------
                               Video Management
   -------------------------------------------------------------------------- */

/* device */

static int
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acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
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{
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	int status;
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	ACPI_FUNCTION_TRACE("acpi_video_device_query");
	status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);

	return_VALUE(status);
}

static int
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acpi_video_device_get_state(struct acpi_video_device *device,
			    unsigned long *state)
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{
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	int status;
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	ACPI_FUNCTION_TRACE("acpi_video_device_get_state");

	status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);

	return_VALUE(status);
}

static int
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acpi_video_device_set_state(struct acpi_video_device *device, int state)
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{
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	int status;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
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	unsigned long ret;
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	ACPI_FUNCTION_TRACE("acpi_video_device_set_state");

	arg0.integer.value = state;
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	status = acpi_evaluate_integer(device->handle, "_DSS", &args, &ret);
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	return_VALUE(status);
}

static int
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acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
				   union acpi_object **levels)
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{
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	int status;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
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	ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");

	*levels = NULL;

	status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
	if (!ACPI_SUCCESS(status))
		return_VALUE(status);
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	obj = (union acpi_object *)buffer.pointer;
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	if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _BCL data\n"));
		status = -EFAULT;
		goto err;
	}

	*levels = obj;

	return_VALUE(0);

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      err:
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	kfree(buffer.pointer);
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	return_VALUE(status);
}

static int
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acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
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{
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	int status;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
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	ACPI_FUNCTION_TRACE("acpi_video_device_lcd_set_level");

	arg0.integer.value = level;
	status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);

	printk(KERN_DEBUG "set_level status: %x\n", status);
	return_VALUE(status);
}

static int
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acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
					unsigned long *level)
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{
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	int status;
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	ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");

	status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);

	return_VALUE(status);
}

static int
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acpi_video_device_EDID(struct acpi_video_device *device,
		       union acpi_object **edid, ssize_t length)
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{
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	int status;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
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	ACPI_FUNCTION_TRACE("acpi_video_device_get_EDID");

	*edid = NULL;

	if (!device)
		return_VALUE(-ENODEV);
	if (length == 128)
		arg0.integer.value = 1;
	else if (length == 256)
		arg0.integer.value = 2;
	else
		return_VALUE(-EINVAL);

	status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
	if (ACPI_FAILURE(status))
		return_VALUE(-ENODEV);

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	obj = (union acpi_object *)buffer.pointer;
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	if (obj && obj->type == ACPI_TYPE_BUFFER)
		*edid = obj;
	else {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DDC data\n"));
		status = -EFAULT;
		kfree(obj);
	}

	return_VALUE(status);
}

/* bus */

static int
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acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
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{
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	int status;
	unsigned long tmp;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
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	ACPI_FUNCTION_TRACE("acpi_video_bus_set_POST");

	arg0.integer.value = option;

	status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
	if (ACPI_SUCCESS(status))
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		status = tmp ? (-EINVAL) : (AE_OK);
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	return_VALUE(status);
}

static int
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acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
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{
	int status;

	ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");

	status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);

	return_VALUE(status);
}

static int
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acpi_video_bus_POST_options(struct acpi_video_bus *video,
			    unsigned long *options)
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{
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	int status;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_POST_options");

	status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
	*options &= 3;

	return_VALUE(status);
}

/*
 *  Arg:
 *  	video		: video bus device pointer
 *	bios_flag	: 
 *		0.	The system BIOS should NOT automatically switch(toggle)
 *			the active display output.
 *		1.	The system BIOS should automatically switch (toggle) the
 *			active display output. No swich event.
 *		2.	The _DGS value should be locked.
 *		3.	The system BIOS should not automatically switch (toggle) the
 *			active display output, but instead generate the display switch
 *			event notify code.
 *	lcd_flag	:
 *		0.	The system BIOS should automatically control the brightness level
 *			of the LCD, when the power changes from AC to DC
 *		1. 	The system BIOS should NOT automatically control the brightness 
 *			level of the LCD, when the power changes from AC to DC.
 * Return Value:
 * 		-1	wrong arg.
 */

static int
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acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
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{
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	acpi_integer status = 0;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
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	ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");

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	if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
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		status = -1;
		goto Failed;
	}
	arg0.integer.value = (lcd_flag << 2) | bios_flag;
	video->dos_setting = arg0.integer.value;
	acpi_evaluate_object(video->handle, "_DOS", &args, NULL);

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      Failed:
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	return_VALUE(status);
}

/*
 *  Arg:	
 *  	device	: video output device (LCD, CRT, ..)
 *
 *  Return Value:
 *  	None
 *
 *  Find out all required AML method defined under the output
 *  device.
 */

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static void acpi_video_device_find_cap(struct acpi_video_device *device)
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{
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	acpi_integer status;
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	acpi_handle h_dummy1;
	int i;
	union acpi_object *obj = NULL;
	struct acpi_video_device_brightness *br = NULL;

	ACPI_FUNCTION_TRACE("acpi_video_device_find_cap");

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	memset(&device->cap, 0, 4);
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	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
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		device->cap._ADR = 1;
	}
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	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
		device->cap._BCL = 1;
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	}
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	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
		device->cap._BCM = 1;
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	}
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	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
		device->cap._DDC = 1;
L
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532
	}
L
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533
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
L
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		device->cap._DCS = 1;
	}
L
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536
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
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		device->cap._DGS = 1;
	}
L
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539
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
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		device->cap._DSS = 1;
	}

	status = acpi_video_device_lcd_query_levels(device, &obj);

	if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
		int count = 0;
		union acpi_object *o;
L
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548

549
		br = kmalloc(sizeof(*br), GFP_KERNEL);
L
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		if (!br) {
			printk(KERN_ERR "can't allocate memory\n");
		} else {
553 554
			memset(br, 0, sizeof(*br));
			br->levels = kmalloc(obj->package.count *
L
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555
					     sizeof *(br->levels), GFP_KERNEL);
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556 557 558 559
			if (!br->levels)
				goto out;

			for (i = 0; i < obj->package.count; i++) {
L
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				o = (union acpi_object *)&obj->package.
				    elements[i];
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				if (o->type != ACPI_TYPE_INTEGER) {
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					ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
							  "Invalid data\n"));
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					continue;
				}
				br->levels[count] = (u32) o->integer.value;
				count++;
			}
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		      out:
L
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			if (count < 2) {
572
				kfree(br->levels);
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				kfree(br);
			} else {
				br->count = count;
				device->brightness = br;
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				ACPI_DEBUG_PRINT((ACPI_DB_INFO,
						  "found %d brightness levels\n",
						  count));
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			}
		}
	}

584
	kfree(obj);
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	return_VOID;
}

/*
 *  Arg:	
 *  	device	: video output device (VGA)
 *
 *  Return Value:
 *  	None
 *
 *  Find out all required AML method defined under the video bus device.
 */

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static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
L
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{
L
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601
	acpi_handle h_dummy1;
L
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602

L
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	memset(&video->cap, 0, 4);
	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
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		video->cap._DOS = 1;
	}
L
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	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
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		video->cap._DOD = 1;
	}
L
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	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
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611 612
		video->cap._ROM = 1;
	}
L
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	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
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		video->cap._GPD = 1;
	}
L
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616
	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
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		video->cap._SPD = 1;
	}
L
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	if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
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		video->cap._VPO = 1;
	}
}

/*
 * Check whether the video bus device has required AML method to
 * support the desired features
 */

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static int acpi_video_bus_check(struct acpi_video_bus *video)
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{
L
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631
	acpi_status status = -ENOENT;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_check");

	if (!video)
		return_VALUE(-EINVAL);

	/* Since there is no HID, CID and so on for VGA driver, we have
	 * to check well known required nodes.
	 */

	/* Does this device able to support video switching ? */
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	if (video->cap._DOS) {
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		video->flags.multihead = 1;
		status = 0;
	}

	/* Does this device able to retrieve a retrieve a video ROM ? */
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	if (video->cap._ROM) {
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		video->flags.rom = 1;
		status = 0;
	}

	/* Does this device able to configure which video device to POST ? */
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	if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
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		video->flags.post = 1;
		status = 0;
	}

	return_VALUE(status);
}

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

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static struct proc_dir_entry *acpi_video_dir;
L
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/* video devices */

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static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
L
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{
L
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	struct acpi_video_device *dev =
	    (struct acpi_video_device *)seq->private;
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	ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");

	if (!dev)
		goto end;

	seq_printf(seq, "device_id:    0x%04x\n", (u32) dev->device_id);
	seq_printf(seq, "type:         ");
	if (dev->flags.crt)
		seq_printf(seq, "CRT\n");
	else if (dev->flags.lcd)
		seq_printf(seq, "LCD\n");
	else if (dev->flags.tvout)
		seq_printf(seq, "TVOUT\n");
	else
		seq_printf(seq, "UNKNOWN\n");

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	seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
L
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L
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      end:
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	return_VALUE(0);
}

static int
L
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acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
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{
	return single_open(file, acpi_video_device_info_seq_show,
			   PDE(inode)->data);
}

L
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static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
L
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706
{
L
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707 708 709 710
	int status;
	struct acpi_video_device *dev =
	    (struct acpi_video_device *)seq->private;
	unsigned long state;
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711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730

	ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");

	if (!dev)
		goto end;

	status = acpi_video_device_get_state(dev, &state);
	seq_printf(seq, "state:     ");
	if (ACPI_SUCCESS(status))
		seq_printf(seq, "0x%02lx\n", state);
	else
		seq_printf(seq, "<not supported>\n");

	status = acpi_video_device_query(dev, &state);
	seq_printf(seq, "query:     ");
	if (ACPI_SUCCESS(status))
		seq_printf(seq, "0x%02lx\n", state);
	else
		seq_printf(seq, "<not supported>\n");

L
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731
      end:
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	return_VALUE(0);
}

static int
L
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acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
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737 738 739 740 741 742
{
	return single_open(file, acpi_video_device_state_seq_show,
			   PDE(inode)->data);
}

static ssize_t
L
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743 744 745
acpi_video_device_write_state(struct file *file,
			      const char __user * buffer,
			      size_t count, loff_t * data)
L
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746
{
L
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747 748 749 750 751
	int status;
	struct seq_file *m = (struct seq_file *)file->private_data;
	struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
	char str[12] = { 0 };
	u32 state = 0;
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	ACPI_FUNCTION_TRACE("acpi_video_device_write_state");

	if (!dev || count + 1 > sizeof str)
		return_VALUE(-EINVAL);

	if (copy_from_user(str, buffer, count))
		return_VALUE(-EFAULT);

	str[count] = 0;
	state = simple_strtoul(str, NULL, 0);
L
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	state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
L
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764 765 766 767 768 769 770 771 772 773

	status = acpi_video_device_set_state(dev, state);

	if (status)
		return_VALUE(-EFAULT);

	return_VALUE(count);
}

static int
L
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acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
L
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775
{
L
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	struct acpi_video_device *dev =
	    (struct acpi_video_device *)seq->private;
	int i;
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	ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");

	if (!dev || !dev->brightness) {
		seq_printf(seq, "<not supported>\n");
		return_VALUE(0);
	}

	seq_printf(seq, "levels: ");
	for (i = 0; i < dev->brightness->count; i++)
		seq_printf(seq, " %d", dev->brightness->levels[i]);
	seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);

	return_VALUE(0);
}

static int
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acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
L
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797 798 799 800 801 802
{
	return single_open(file, acpi_video_device_brightness_seq_show,
			   PDE(inode)->data);
}

static ssize_t
L
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acpi_video_device_write_brightness(struct file *file,
				   const char __user * buffer,
				   size_t count, loff_t * data)
L
Linus Torvalds 已提交
806
{
L
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807 808 809 810 811
	struct seq_file *m = (struct seq_file *)file->private_data;
	struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
	char str[4] = { 0 };
	unsigned int level = 0;
	int i;
L
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812 813 814

	ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");

815
	if (!dev || !dev->brightness || count + 1 > sizeof str)
L
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816 817 818 819 820 821 822
		return_VALUE(-EINVAL);

	if (copy_from_user(str, buffer, count))
		return_VALUE(-EFAULT);

	str[count] = 0;
	level = simple_strtoul(str, NULL, 0);
L
Len Brown 已提交
823

L
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824 825 826 827 828 829
	if (level > 100)
		return_VALUE(-EFAULT);

	/* validate though the list of available levels */
	for (i = 0; i < dev->brightness->count; i++)
		if (level == dev->brightness->levels[i]) {
L
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830 831
			if (ACPI_SUCCESS
			    (acpi_video_device_lcd_set_level(dev, level)))
L
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832 833 834 835 836 837 838
				dev->brightness->curr = level;
			break;
		}

	return_VALUE(count);
}

L
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839
static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
L
Linus Torvalds 已提交
840
{
L
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841 842 843 844 845
	struct acpi_video_device *dev =
	    (struct acpi_video_device *)seq->private;
	int status;
	int i;
	union acpi_object *edid = NULL;
L
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846 847 848 849 850 851

	ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");

	if (!dev)
		goto out;

L
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	status = acpi_video_device_EDID(dev, &edid, 128);
L
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853
	if (ACPI_FAILURE(status)) {
L
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854
		status = acpi_video_device_EDID(dev, &edid, 256);
L
Linus Torvalds 已提交
855 856 857 858 859 860 861 862 863 864 865
	}

	if (ACPI_FAILURE(status)) {
		goto out;
	}

	if (edid && edid->type == ACPI_TYPE_BUFFER) {
		for (i = 0; i < edid->buffer.length; i++)
			seq_putc(seq, edid->buffer.pointer[i]);
	}

L
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866
      out:
L
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867 868 869 870 871 872 873 874 875
	if (!edid)
		seq_printf(seq, "<not supported>\n");
	else
		kfree(edid);

	return_VALUE(0);
}

static int
L
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876
acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
L
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877 878 879 880 881
{
	return single_open(file, acpi_video_device_EDID_seq_show,
			   PDE(inode)->data);
}

L
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882
static int acpi_video_device_add_fs(struct acpi_device *device)
L
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883
{
L
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884
	struct proc_dir_entry *entry = NULL;
L
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885 886 887 888 889 890 891
	struct acpi_video_device *vid_dev;

	ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");

	if (!device)
		return_VALUE(-ENODEV);

L
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892
	vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
L
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893 894 895 896 897
	if (!vid_dev)
		return_VALUE(-ENODEV);

	if (!acpi_device_dir(device)) {
		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
L
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898
						     vid_dev->video->dir);
L
Linus Torvalds 已提交
899 900 901 902 903 904 905 906 907
		if (!acpi_device_dir(device))
			return_VALUE(-ENODEV);
		acpi_device_dir(device)->owner = THIS_MODULE;
	}

	/* 'info' [R] */
	entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
	if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
Len Brown 已提交
908
				  "Unable to create 'info' fs entry\n"));
L
Linus Torvalds 已提交
909 910 911 912 913 914 915
	else {
		entry->proc_fops = &acpi_video_device_info_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'state' [R/W] */
L
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916 917 918
	entry =
	    create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
			      acpi_device_dir(device));
L
Linus Torvalds 已提交
919 920
	if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
Len Brown 已提交
921
				  "Unable to create 'state' fs entry\n"));
L
Linus Torvalds 已提交
922 923 924 925 926 927 928 929
	else {
		entry->proc_fops = &acpi_video_device_state_fops;
		entry->proc_fops->write = acpi_video_device_write_state;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'brightness' [R/W] */
L
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	entry =
	    create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
			      acpi_device_dir(device));
L
Linus Torvalds 已提交
933 934
	if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
Len Brown 已提交
935
				  "Unable to create 'brightness' fs entry\n"));
L
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936 937 938 939 940 941 942 943 944 945 946
	else {
		entry->proc_fops = &acpi_video_device_brightness_fops;
		entry->proc_fops->write = acpi_video_device_write_brightness;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'EDID' [R] */
	entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
	if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
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947
				  "Unable to create 'brightness' fs entry\n"));
L
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948 949 950 951 952 953 954 955 956
	else {
		entry->proc_fops = &acpi_video_device_EDID_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	return_VALUE(0);
}

L
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static int acpi_video_device_remove_fs(struct acpi_device *device)
L
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{
	struct acpi_video_device *vid_dev;
	ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");

L
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	vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
L
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	if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
		return_VALUE(-ENODEV);

	if (acpi_device_dir(device)) {
		remove_proc_entry("info", acpi_device_dir(device));
		remove_proc_entry("state", acpi_device_dir(device));
		remove_proc_entry("brightness", acpi_device_dir(device));
		remove_proc_entry("EDID", acpi_device_dir(device));
L
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		remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
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		acpi_device_dir(device) = NULL;
	}

	return_VALUE(0);
}

/* video bus */
L
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static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
L
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980
{
L
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	struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
L
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982 983 984 985 986 987 988

	ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");

	if (!video)
		goto end;

	seq_printf(seq, "Switching heads:              %s\n",
L
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		   video->flags.multihead ? "yes" : "no");
L
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	seq_printf(seq, "Video ROM:                    %s\n",
L
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		   video->flags.rom ? "yes" : "no");
L
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	seq_printf(seq, "Device to be POSTed on boot:  %s\n",
L
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993
		   video->flags.post ? "yes" : "no");
L
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994

L
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995
      end:
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	return_VALUE(0);
}

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static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
L
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1000
{
L
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1001 1002
	return single_open(file, acpi_video_bus_info_seq_show,
			   PDE(inode)->data);
L
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}

L
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static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
L
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{
L
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1007
	struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
L
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	ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");

	if (!video)
		goto end;

	printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
	seq_printf(seq, "<TODO>\n");

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      end:
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	return_VALUE(0);
}

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static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
L
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1022 1023 1024 1025
{
	return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
}

L
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static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
L
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1027
{
L
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1028 1029 1030
	struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
	unsigned long options;
	int status;
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1031 1032 1033 1034 1035 1036 1037 1038 1039

	ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");

	if (!video)
		goto end;

	status = acpi_video_bus_POST_options(video, &options);
	if (ACPI_SUCCESS(status)) {
		if (!(options & 1)) {
L
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			printk(KERN_WARNING PREFIX
			       "The motherboard VGA device is not listed as a possible POST device.\n");
			printk(KERN_WARNING PREFIX
			       "This indicate a BIOS bug.  Please contact the manufacturer.\n");
L
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1044 1045 1046 1047 1048 1049 1050 1051 1052 1053
		}
		printk("%lx\n", options);
		seq_printf(seq, "can POST: <intgrated video>");
		if (options & 2)
			seq_printf(seq, " <PCI video>");
		if (options & 4)
			seq_printf(seq, " <AGP video>");
		seq_putc(seq, '\n');
	} else
		seq_printf(seq, "<not supported>\n");
L
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      end:
L
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	return_VALUE(0);
}

static int
L
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acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
L
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{
L
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1061 1062
	return single_open(file, acpi_video_bus_POST_info_seq_show,
			   PDE(inode)->data);
L
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1063 1064
}

L
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static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
L
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{
L
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	struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
	int status;
	unsigned long id;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");

	if (!video)
		goto end;

L
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	status = acpi_video_bus_get_POST(video, &id);
L
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	if (!ACPI_SUCCESS(status)) {
		seq_printf(seq, "<not supported>\n");
		goto end;
	}
L
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	seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
L
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1082

L
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1083
      end:
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	return_VALUE(0);
}

L
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1087
static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
L
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{
L
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1089
	struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
L
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	ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");

L
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	seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
L
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1094 1095 1096 1097

	return_VALUE(0);
}

L
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static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
L
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{
L
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1100 1101
	return single_open(file, acpi_video_bus_POST_seq_show,
			   PDE(inode)->data);
L
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1102 1103
}

L
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static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
L
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{
	return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
}

static ssize_t
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acpi_video_bus_write_POST(struct file *file,
			  const char __user * buffer,
			  size_t count, loff_t * data)
L
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{
L
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	int status;
	struct seq_file *m = (struct seq_file *)file->private_data;
	struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
	char str[12] = { 0 };
	unsigned long opt, options;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");

	if (!video || count + 1 > sizeof str)
		return_VALUE(-EINVAL);

	status = acpi_video_bus_POST_options(video, &options);
	if (!ACPI_SUCCESS(status))
		return_VALUE(-EINVAL);

	if (copy_from_user(str, buffer, count))
		return_VALUE(-EFAULT);

	str[count] = 0;
	opt = strtoul(str, NULL, 0);
	if (opt > 3)
		return_VALUE(-EFAULT);

	/* just in case an OEM 'forget' the motherboard... */
	options |= 1;

	if (options & (1ul << opt)) {
L
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		status = acpi_video_bus_set_POST(video, opt);
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		if (!ACPI_SUCCESS(status))
			return_VALUE(-EFAULT);

	}

	return_VALUE(count);
}

static ssize_t
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acpi_video_bus_write_DOS(struct file *file,
			 const char __user * buffer,
			 size_t count, loff_t * data)
L
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1154
{
L
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	int status;
	struct seq_file *m = (struct seq_file *)file->private_data;
	struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
	char str[12] = { 0 };
	unsigned long opt;
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1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173

	ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");

	if (!video || count + 1 > sizeof str)
		return_VALUE(-EINVAL);

	if (copy_from_user(str, buffer, count))
		return_VALUE(-EFAULT);

	str[count] = 0;
	opt = strtoul(str, NULL, 0);
	if (opt > 7)
		return_VALUE(-EFAULT);

L
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	status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
L
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	if (!ACPI_SUCCESS(status))
		return_VALUE(-EFAULT);

	return_VALUE(count);
}

L
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static int acpi_video_bus_add_fs(struct acpi_device *device)
L
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1183
{
L
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	struct proc_dir_entry *entry = NULL;
	struct acpi_video_bus *video;
L
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1186 1187 1188

	ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");

L
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	video = (struct acpi_video_bus *)acpi_driver_data(device);
L
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1190 1191 1192

	if (!acpi_device_dir(device)) {
		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
L
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1193
						     acpi_video_dir);
L
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		if (!acpi_device_dir(device))
			return_VALUE(-ENODEV);
		video->dir = acpi_device_dir(device);
		acpi_device_dir(device)->owner = THIS_MODULE;
	}

	/* 'info' [R] */
	entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
	if (!entry)
L
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1203 1204
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create 'info' fs entry\n"));
L
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	else {
		entry->proc_fops = &acpi_video_bus_info_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'ROM' [R] */
	entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
	if (!entry)
L
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		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create 'ROM' fs entry\n"));
L
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1216 1217 1218 1219 1220 1221 1222
	else {
		entry->proc_fops = &acpi_video_bus_ROM_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'POST_info' [R] */
L
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	entry =
	    create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
L
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1225
	if (!entry)
L
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		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create 'POST_info' fs entry\n"));
L
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1228 1229 1230 1231 1232 1233 1234
	else {
		entry->proc_fops = &acpi_video_bus_POST_info_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'POST' [R/W] */
L
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1235 1236 1237
	entry =
	    create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
			      acpi_device_dir(device));
L
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1238
	if (!entry)
L
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1239 1240
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create 'POST' fs entry\n"));
L
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1241 1242 1243 1244 1245 1246 1247 1248
	else {
		entry->proc_fops = &acpi_video_bus_POST_fops;
		entry->proc_fops->write = acpi_video_bus_write_POST;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	/* 'DOS' [R/W] */
L
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	entry =
	    create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
			      acpi_device_dir(device));
L
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1252
	if (!entry)
L
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1253 1254
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create 'DOS' fs entry\n"));
L
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1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
	else {
		entry->proc_fops = &acpi_video_bus_DOS_fops;
		entry->proc_fops->write = acpi_video_bus_write_DOS;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	return_VALUE(0);
}

L
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1265
static int acpi_video_bus_remove_fs(struct acpi_device *device)
L
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1266
{
L
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1267
	struct acpi_video_bus *video;
L
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1268 1269 1270

	ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");

L
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	video = (struct acpi_video_bus *)acpi_driver_data(device);
L
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1272 1273 1274 1275 1276 1277 1278

	if (acpi_device_dir(device)) {
		remove_proc_entry("info", acpi_device_dir(device));
		remove_proc_entry("ROM", acpi_device_dir(device));
		remove_proc_entry("POST_info", acpi_device_dir(device));
		remove_proc_entry("POST", acpi_device_dir(device));
		remove_proc_entry("DOS", acpi_device_dir(device));
L
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		remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
L
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1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292
		acpi_device_dir(device) = NULL;
	}

	return_VALUE(0);
}

/* --------------------------------------------------------------------------
                                 Driver Interface
   -------------------------------------------------------------------------- */

/* device interface */

static int
L
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acpi_video_bus_get_one_device(struct acpi_device *device,
			      struct acpi_video_bus *video)
L
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1295
{
L
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1296 1297 1298
	unsigned long device_id;
	int status, result;
	struct acpi_video_device *data;
L
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1299 1300 1301 1302 1303 1304

	ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");

	if (!device || !video)
		return_VALUE(-EINVAL);

L
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1305 1306
	status =
	    acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
L
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1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
	if (ACPI_SUCCESS(status)) {

		data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
		if (!data)
			return_VALUE(-ENOMEM);

		memset(data, 0, sizeof(struct acpi_video_device));

		data->handle = device->handle;
		strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
		strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
		acpi_driver_data(device) = data;

		data->device_id = device_id;
		data->video = video;
		data->dev = device;

		switch (device_id & 0xffff) {
		case 0x0100:
			data->flags.crt = 1;
			break;
		case 0x0400:
			data->flags.lcd = 1;
			break;
		case 0x0200:
			data->flags.tvout = 1;
			break;
		default:
			data->flags.unknown = 1;
			break;
		}
L
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1338

L
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1339 1340 1341 1342
		acpi_video_device_bind(video, data);
		acpi_video_device_find_cap(data);

		status = acpi_install_notify_handler(data->handle,
L
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1343 1344 1345
						     ACPI_DEVICE_NOTIFY,
						     acpi_video_device_notify,
						     data);
L
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1346 1347
		if (ACPI_FAILURE(status)) {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
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1348
					  "Error installing notify handler\n"));
L
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1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361
			result = -ENODEV;
			goto end;
		}

		down(&video->sem);
		list_add_tail(&data->entry, &video->video_device_list);
		up(&video->sem);

		acpi_video_device_add_fs(device);

		return_VALUE(0);
	}

L
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1362
      end:
L
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1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
	return_VALUE(-ENOENT);
}

/*
 *  Arg:
 *  	video	: video bus device 
 *
 *  Return:
 *  	none
 *  
 *  Enumerate the video device list of the video bus, 
 *  bind the ids with the corresponding video devices
 *  under the video bus.
L
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 */
L
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1377

L
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1378
static void acpi_video_device_rebind(struct acpi_video_bus *video)
L
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1379
{
L
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1380
	struct list_head *node, *next;
L
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1381
	list_for_each_safe(node, next, &video->video_device_list) {
L
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		struct acpi_video_device *dev =
		    container_of(node, struct acpi_video_device, entry);
		acpi_video_device_bind(video, dev);
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	}
}

/*
 *  Arg:
 *  	video	: video bus device 
 *  	device	: video output device under the video 
 *  		bus
 *
 *  Return:
 *  	none
 *  
 *  Bind the ids with the corresponding video devices
 *  under the video bus.
L
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 */
L
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1400 1401

static void
L
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1402 1403
acpi_video_device_bind(struct acpi_video_bus *video,
		       struct acpi_video_device *device)
L
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1404
{
L
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1405
	int i;
L
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1406 1407 1408 1409
	ACPI_FUNCTION_TRACE("acpi_video_device_bind");

#define IDS_VAL(i) video->attached_array[i].value.int_val
#define IDS_BIND(i) video->attached_array[i].bind_info
L
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	for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
	     i < video->attached_count; i++) {
		if (device->device_id == (IDS_VAL(i) & 0xffff)) {
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			IDS_BIND(i) = device;
			ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
		}
	}
#undef IDS_VAL
#undef IDS_BIND
}

/*
 *  Arg:
 *  	video	: video bus device 
 *
 *  Return:
 *  	< 0	: error
 *  
 *  Call _DOD to enumerate all devices attached to display adapter
 *
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 */
L
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1432 1433 1434

static int acpi_video_device_enumerate(struct acpi_video_bus *video)
{
L
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	int status;
	int count;
	int i;
L
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1438
	struct acpi_video_enumerated_device *active_device_list;
L
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	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *dod = NULL;
	union acpi_object *obj;
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	ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");

	status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
	if (!ACPI_SUCCESS(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
		return_VALUE(status);
	}

L
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	dod = (union acpi_object *)buffer.pointer;
L
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	if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
		status = -EFAULT;
		goto out;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
L
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			  dod->package.count));
L
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1460

L
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	active_device_list = kmalloc((1 +
				      dod->package.count) *
				     sizeof(struct
					    acpi_video_enumerated_device),
				     GFP_KERNEL);
L
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	if (!active_device_list) {
		status = -ENOMEM;
		goto out;
	}

	count = 0;
	for (i = 0; i < dod->package.count; i++) {
L
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		obj = (union acpi_object *)&dod->package.elements[i];
L
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1475 1476

		if (obj->type != ACPI_TYPE_INTEGER) {
L
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			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "Invalid _DOD data\n"));
			active_device_list[i].value.int_val =
			    ACPI_VIDEO_HEAD_INVALID;
L
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		}
		active_device_list[i].value.int_val = obj->integer.value;
		active_device_list[i].bind_info = NULL;
L
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		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
				  (int)obj->integer.value));
L
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1486 1487 1488 1489
		count++;
	}
	active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;

1490
	kfree(video->attached_array);
L
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1491

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	video->attached_array = active_device_list;
	video->attached_count = count;
L
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1494
      out:
L
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	acpi_os_free(buffer.pointer);
	return_VALUE(status);
}

/*
 *  Arg:
 *  	video	: video bus device 
 *  	event	: Nontify Event
 *
 *  Return:
 *  	< 0	: error
 *  
 *	1. Find out the current active output device.
 *	2. Identify the next output device to switch
 *	3. call _DSS to do actual switch.
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 */
L
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1511

L
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static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
L
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{
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	struct list_head *node, *next;
	struct acpi_video_device *dev = NULL;
	struct acpi_video_device *dev_next = NULL;
	struct acpi_video_device *dev_prev = NULL;
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	unsigned long state;
	int status = 0;

	ACPI_FUNCTION_TRACE("acpi_video_switch_output");

	list_for_each_safe(node, next, &video->video_device_list) {
1524
		dev = container_of(node, struct acpi_video_device, entry);
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		status = acpi_video_device_get_state(dev, &state);
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		if (state & 0x2) {
			dev_next =
			    container_of(node->next, struct acpi_video_device,
					 entry);
			dev_prev =
			    container_of(node->prev, struct acpi_video_device,
					 entry);
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			goto out;
		}
	}
	dev_next = container_of(node->next, struct acpi_video_device, entry);
	dev_prev = container_of(node->prev, struct acpi_video_device, entry);
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      out:
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	switch (event) {
	case ACPI_VIDEO_NOTIFY_CYCLE:
	case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
		acpi_video_device_set_state(dev, 0);
		acpi_video_device_set_state(dev_next, 0x80000001);
		break;
	case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
		acpi_video_device_set_state(dev, 0);
		acpi_video_device_set_state(dev_prev, 0x80000001);
	default:
		break;
	}

	return_VALUE(status);
}

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static int
acpi_video_get_next_level(struct acpi_video_device *device,
			  u32 level_current, u32 event)
L
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{
L
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	/*Fix me */
L
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	return level_current;
}

static void
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acpi_video_switch_brightness(struct acpi_video_device *device, int event)
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{
	unsigned long level_current, level_next;
	acpi_video_device_lcd_get_level_current(device, &level_current);
	level_next = acpi_video_get_next_level(device, level_current, event);
	acpi_video_device_lcd_set_level(device, level_next);
}

static int
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acpi_video_bus_get_devices(struct acpi_video_bus *video,
			   struct acpi_device *device)
L
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{
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	int status = 0;
	struct list_head *node, *next;
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	ACPI_FUNCTION_TRACE("acpi_video_get_devices");

	acpi_video_device_enumerate(video);

	list_for_each_safe(node, next, &device->children) {
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		struct acpi_device *dev =
		    list_entry(node, struct acpi_device, node);
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		if (!dev)
			continue;

		status = acpi_video_bus_get_one_device(dev, video);
		if (ACPI_FAILURE(status)) {
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			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "Cant attach device\n"));
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			continue;
		}

	}
	return_VALUE(status);
}

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static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
L
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{
1603
	acpi_status status;
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	struct acpi_video_bus *video;

	ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");

	if (!device || !device->video)
		return_VALUE(-ENOENT);

	video = device->video;

	down(&video->sem);
	list_del(&device->entry);
	up(&video->sem);
	acpi_video_device_remove_fs(device->dev);

1618
	status = acpi_remove_notify_handler(device->handle,
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					    ACPI_DEVICE_NOTIFY,
					    acpi_video_device_notify);
1621 1622
	if (ACPI_FAILURE(status))
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
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1623
				  "Error removing notify handler\n"));
1624

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	return_VALUE(0);
}

L
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static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
L
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{
L
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	int status;
	struct list_head *node, *next;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");

	list_for_each_safe(node, next, &video->video_device_list) {
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		struct acpi_video_device *data =
		    list_entry(node, struct acpi_video_device, entry);
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		if (!data)
			continue;

		status = acpi_video_bus_put_one_device(data);
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		if (ACPI_FAILURE(status))
			printk(KERN_WARNING PREFIX
			       "hhuuhhuu bug in acpi video driver.\n");
L
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1646
		kfree(data->brightness);
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		kfree(data);
	}

	return_VALUE(0);
}

/* acpi_video interface */

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static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
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{
	return acpi_video_bus_DOS(video, 1, 0);
}

L
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static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
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{
	return acpi_video_bus_DOS(video, 0, 1);
}

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static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
L
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{
L
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	struct acpi_video_bus *video = (struct acpi_video_bus *)data;
	struct acpi_device *device = NULL;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
	printk("video bus notify\n");

	if (!video)
		return_VOID;

	if (acpi_bus_get_device(handle, &device))
		return_VOID;

	switch (event) {
	case ACPI_VIDEO_NOTIFY_SWITCH:	/* User request that a switch occur,
					 * most likely via hotkey. */
		acpi_bus_generate_event(device, event, 0);
		break;

	case ACPI_VIDEO_NOTIFY_PROBE:	/* User plug or remove a video
					 * connector. */
		acpi_video_device_enumerate(video);
		acpi_video_device_rebind(video);
		acpi_video_switch_output(video, event);
		acpi_bus_generate_event(device, event, 0);
		break;

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	case ACPI_VIDEO_NOTIFY_CYCLE:	/* Cycle Display output hotkey pressed. */
	case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:	/* Next Display output hotkey pressed. */
	case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:	/* previous Display output hotkey pressed. */
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		acpi_video_switch_output(video, event);
		acpi_bus_generate_event(device, event, 0);
		break;

	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
L
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				  "Unsupported event [0x%x]\n", event));
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		break;
	}

	return_VOID;
}

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1710
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
L
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{
L
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	struct acpi_video_device *video_device =
	    (struct acpi_video_device *)data;
	struct acpi_device *device = NULL;
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	ACPI_FUNCTION_TRACE("acpi_video_device_notify");

	printk("video device notify\n");
	if (!video_device)
		return_VOID;

	if (acpi_bus_get_device(handle, &device))
		return_VOID;

	switch (event) {
L
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	case ACPI_VIDEO_NOTIFY_SWITCH:	/* change in status (cycle output device) */
	case ACPI_VIDEO_NOTIFY_PROBE:	/* change in status (output device status) */
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		acpi_bus_generate_event(device, event, 0);
		break;
L
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	case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:	/* Cycle brightness */
	case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:	/* Increase brightness */
	case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:	/* Decrease brightness */
	case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:	/* zero brightnesss */
	case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:	/* display device off */
		acpi_video_switch_brightness(video_device, event);
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		acpi_bus_generate_event(device, event, 0);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
L
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				  "Unsupported event [0x%x]\n", event));
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		break;
	}
	return_VOID;
}

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static int acpi_video_bus_add(struct acpi_device *device)
L
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{
L
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	int result = 0;
	acpi_status status = 0;
	struct acpi_video_bus *video = NULL;
L
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	ACPI_FUNCTION_TRACE("acpi_video_bus_add");
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	if (!device)
		return_VALUE(-EINVAL);

	video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
	if (!video)
		return_VALUE(-ENOMEM);
	memset(video, 0, sizeof(struct acpi_video_bus));

	video->handle = device->handle;
	strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
	strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
	acpi_driver_data(device) = video;

	acpi_video_bus_find_cap(video);
	result = acpi_video_bus_check(video);
	if (result)
		goto end;

	result = acpi_video_bus_add_fs(device);
	if (result)
		goto end;

	init_MUTEX(&video->sem);
	INIT_LIST_HEAD(&video->video_device_list);

	acpi_video_bus_get_devices(video, device);
	acpi_video_bus_start_devices(video);

	status = acpi_install_notify_handler(video->handle,
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					     ACPI_DEVICE_NOTIFY,
					     acpi_video_bus_notify, video);
L
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	if (ACPI_FAILURE(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
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1787
				  "Error installing notify handler\n"));
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		result = -ENODEV;
		goto end;
	}

	printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s  rom: %s  post: %s)\n",
L
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	       ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
	       video->flags.multihead ? "yes" : "no",
	       video->flags.rom ? "yes" : "no",
	       video->flags.post ? "yes" : "no");
L
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L
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      end:
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	if (result) {
		acpi_video_bus_remove_fs(device);
		kfree(video);
	}

	return_VALUE(result);
}

L
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static int acpi_video_bus_remove(struct acpi_device *device, int type)
L
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1808
{
L
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1809 1810
	acpi_status status = 0;
	struct acpi_video_bus *video = NULL;
L
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1811 1812 1813 1814 1815 1816

	ACPI_FUNCTION_TRACE("acpi_video_bus_remove");

	if (!device || !acpi_driver_data(device))
		return_VALUE(-EINVAL);

L
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1817
	video = (struct acpi_video_bus *)acpi_driver_data(device);
L
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1818 1819 1820 1821

	acpi_video_bus_stop_devices(video);

	status = acpi_remove_notify_handler(video->handle,
L
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1822 1823
					    ACPI_DEVICE_NOTIFY,
					    acpi_video_bus_notify);
L
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1824 1825
	if (ACPI_FAILURE(status))
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
L
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1826
				  "Error removing notify handler\n"));
L
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1827 1828 1829 1830

	acpi_video_bus_put_devices(video);
	acpi_video_bus_remove_fs(device);

1831
	kfree(video->attached_array);
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1832 1833 1834 1835 1836 1837
	kfree(video);

	return_VALUE(0);
}

static int
L
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1838
acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
L
Linus Torvalds 已提交
1839
{
L
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1840 1841 1842
	acpi_handle h_dummy1;
	acpi_handle h_dummy2;
	acpi_handle h_dummy3;
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	ACPI_FUNCTION_TRACE("acpi_video_bus_match");

	if (!device || !driver)
		return_VALUE(-EINVAL);

	/* Since there is no HID, CID for ACPI Video drivers, we have
	 * to check well known required nodes for each feature we support.
	 */

	/* Does this device able to support video switching ? */
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
	    ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
		return_VALUE(0);

	/* Does this device able to retrieve a video ROM ? */
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
		return_VALUE(0);

	/* Does this device able to configure which video head to be POSTed ? */
	if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
	    ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
	    ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
		return_VALUE(0);

	return_VALUE(-ENODEV);
}

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static int __init acpi_video_init(void)
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1872
{
L
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	int result = 0;
L
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1874 1875 1876 1877

	ACPI_FUNCTION_TRACE("acpi_video_init");

	/*
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	   acpi_dbg_level = 0xFFFFFFFF;
	   acpi_dbg_layer = 0x08000000;
	 */
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	acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
	if (!acpi_video_dir)
		return_VALUE(-ENODEV);
	acpi_video_dir->owner = THIS_MODULE;

	result = acpi_bus_register_driver(&acpi_video_bus);
	if (result < 0) {
		remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
		return_VALUE(-ENODEV);
	}

	return_VALUE(0);
}

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static void __exit acpi_video_exit(void)
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{
	ACPI_FUNCTION_TRACE("acpi_video_exit");

	acpi_bus_unregister_driver(&acpi_video_bus);

	remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);

	return_VOID;
}

module_init(acpi_video_init);
module_exit(acpi_video_exit);