--- /dev/null
+/*
+ * 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
+ACPI_MODULE_NAME ("acpi_video")
+
+MODULE_AUTHOR("Bruno Ducrot");
+MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
+MODULE_LICENSE("GPL");
+
+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);
+
+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,
+ },
+};
+
+struct acpi_video_bus_flags {
+ 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;
+};
+
+struct acpi_video_bus_cap {
+ 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;
+};
+
+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*/
+};
+
+struct acpi_video_enumerated_device {
+ union {
+ u32 int_val;
+ struct acpi_video_device_attrib attrib;
+ } value;
+ struct acpi_video_device *bind_info;
+};
+
+struct acpi_video_bus {
+ acpi_handle handle;
+ u8 dos_setting;
+ struct acpi_video_enumerated_device *attached_array;
+ u8 attached_count;
+ struct acpi_video_bus_cap cap;
+ struct acpi_video_bus_flags flags;
+ struct semaphore sem;
+ struct list_head video_device_list;
+ struct proc_dir_entry *dir;
+};
+
+struct acpi_video_device_flags {
+ u8 crt:1;
+ u8 lcd:1;
+ u8 tvout:1;
+ u8 bios:1;
+ u8 unknown:1;
+ u8 reserved:3;
+};
+
+struct acpi_video_device_cap {
+ 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;
+};
+
+struct acpi_video_device_brightness {
+ int curr;
+ int count;
+ int *levels;
+};
+
+struct acpi_video_device {
+ 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;
+ 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 = {
+ .open = acpi_video_bus_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_bus_ROM_fops = {
+ .open = acpi_video_bus_ROM_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_bus_POST_info_fops = {
+ .open = acpi_video_bus_POST_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_bus_POST_fops = {
+ .open = acpi_video_bus_POST_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+
+static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_bus_DOS_fops = {
+ .open = acpi_video_bus_DOS_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* device */
+static int acpi_video_device_info_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_device_info_fops = {
+ .open = acpi_video_device_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_device_state_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_device_state_fops = {
+ .open = acpi_video_device_state_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_device_brightness_fops = {
+ .open = acpi_video_device_brightness_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file);
+static struct file_operations acpi_video_device_EDID_fops = {
+ .open = acpi_video_device_EDID_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+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);
+static int acpi_video_device_enumerate(struct acpi_video_bus *video);
+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);
+
+
+/* --------------------------------------------------------------------------
+ Video Management
+ -------------------------------------------------------------------------- */
+
+/* device */
+
+static int
+acpi_video_device_query (
+ struct acpi_video_device *device,
+ unsigned long *state)
+{
+ int status;
+ ACPI_FUNCTION_TRACE("acpi_video_device_query");
+ status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_device_get_state (
+ struct acpi_video_device *device,
+ unsigned long *state)
+{
+ int status;
+
+ ACPI_FUNCTION_TRACE("acpi_video_device_get_state");
+
+ status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_device_set_state (
+ struct acpi_video_device *device,
+ int state)
+{
+ int status;
+ union acpi_object arg0 = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list args = {1, &arg0};
+
+ ACPI_FUNCTION_TRACE("acpi_video_device_set_state");
+
+ arg0.integer.value = state;
+ status = acpi_evaluate_integer(device->handle, "_DSS", &args, NULL);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_device_lcd_query_levels (
+ struct acpi_video_device *device,
+ union acpi_object **levels)
+{
+ int status;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+
+
+ 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);
+ obj = (union acpi_object *) buffer.pointer;
+ 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);
+
+err:
+ if (buffer.pointer)
+ kfree(buffer.pointer);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_device_lcd_set_level (
+ struct acpi_video_device *device,
+ int level)
+{
+ int status;
+ union acpi_object arg0 = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list args = {1, &arg0};
+
+ 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
+acpi_video_device_lcd_get_level_current (
+ struct acpi_video_device *device,
+ unsigned long *level)
+{
+ int status;
+ ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");
+
+ status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_device_EDID (
+ struct acpi_video_device *device,
+ union acpi_object **edid,
+ ssize_t length)
+{
+ 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};
+
+ 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);
+
+ obj = (union acpi_object *) buffer.pointer;
+
+ 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
+acpi_video_bus_set_POST (
+ struct acpi_video_bus *video,
+ unsigned long option)
+{
+ int status;
+ unsigned long tmp;
+ union acpi_object arg0 = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list args = {1, &arg0};
+
+ 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))
+ status = tmp ? (-EINVAL):(AE_OK);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_bus_get_POST (
+ struct acpi_video_bus *video,
+ unsigned long *id)
+{
+ int status;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");
+
+ status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
+
+ return_VALUE(status);
+}
+
+static int
+acpi_video_bus_POST_options (
+ struct acpi_video_bus *video,
+ unsigned long *options)
+{
+ int status;
+ 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
+acpi_video_bus_DOS(
+ struct acpi_video_bus *video,
+ int bios_flag,
+ int lcd_flag)
+{
+ acpi_integer status = 0;
+ union acpi_object arg0 = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list args = {1, &arg0};
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");
+
+ if (bios_flag < 0 || bios_flag >3 || lcd_flag < 0 || lcd_flag > 1){
+ 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);
+
+Failed:
+ return_VALUE(status);
+}
+
+/*
+ * Arg:
+ * device : video output device (LCD, CRT, ..)
+ *
+ * Return Value:
+ * None
+ *
+ * Find out all required AML method defined under the output
+ * device.
+ */
+
+static void
+acpi_video_device_find_cap (struct acpi_video_device *device)
+{
+ acpi_integer status;
+ 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");
+
+ memset( &device->cap, 0, 4);
+
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
+ device->cap._ADR = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
+ device->cap._BCL= 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
+ device->cap._BCM= 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
+ device->cap._DDC= 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
+ device->cap._DCS = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
+ device->cap._DGS = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
+ 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;
+
+ br = kmalloc(sizeof &br, GFP_KERNEL);
+ if (!br) {
+ printk(KERN_ERR "can't allocate memory\n");
+ } else {
+ memset(br, 0, sizeof &br);
+ br->levels = kmalloc(obj->package.count * sizeof &br->levels, GFP_KERNEL);
+ if (!br->levels)
+ goto out;
+
+ for (i = 0; i < obj->package.count; i++) {
+ o = (union acpi_object *) &obj->package.elements[i];
+ if (o->type != ACPI_TYPE_INTEGER) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n"));
+ continue;
+ }
+ br->levels[count] = (u32) o->integer.value;
+ count++;
+ }
+out:
+ if (count < 2) {
+ if (br->levels)
+ kfree(br->levels);
+ kfree(br);
+ } else {
+ br->count = count;
+ device->brightness = br;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
+ }
+ }
+ }
+
+ if (obj)
+ kfree(obj);
+
+ return_VOID;
+}
+
+/*
+ * Arg:
+ * device : video output device (VGA)
+ *
+ * Return Value:
+ * None
+ *
+ * Find out all required AML method defined under the video bus device.
+ */
+
+static void
+acpi_video_bus_find_cap (struct acpi_video_bus *video)
+{
+ acpi_handle h_dummy1;
+
+ memset(&video->cap ,0, 4);
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
+ video->cap._DOS = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
+ video->cap._DOD = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
+ video->cap._ROM = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
+ video->cap._GPD = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
+ video->cap._SPD = 1;
+ }
+ if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
+ video->cap._VPO = 1;
+ }
+}
+
+/*
+ * Check whether the video bus device has required AML method to
+ * support the desired features
+ */
+
+static int
+acpi_video_bus_check (
+ struct acpi_video_bus *video)
+{
+ acpi_status status = -ENOENT;
+
+
+ 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 ? */
+ if(video->cap._DOS){
+ video->flags.multihead = 1;
+ status = 0;
+ }
+
+ /* Does this device able to retrieve a retrieve a video ROM ? */
+ if(video->cap._ROM){
+ video->flags.rom = 1;
+ status = 0;
+ }
+
+ /* Does this device able to configure which video device to POST ? */
+ if(video->cap._GPD && video->cap._SPD && video->cap._VPO){
+ video->flags.post = 1;
+ status = 0;
+ }
+
+ return_VALUE(status);
+}
+
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+struct proc_dir_entry *acpi_video_dir;
+
+/* video devices */
+
+static int
+acpi_video_device_info_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
+
+ 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");
+
+ seq_printf(seq,"known by bios: %s\n",
+ dev->flags.bios ? "yes":"no");
+
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_device_info_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_device_info_seq_show,
+ PDE(inode)->data);
+}
+
+static int
+acpi_video_device_state_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ int status;
+ struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
+ unsigned long state;
+
+ 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");
+
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_device_state_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_device_state_seq_show,
+ PDE(inode)->data);
+}
+
+static ssize_t
+acpi_video_device_write_state (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *data)
+{
+ 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;
+
+ 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);
+ state &= ((1ul<<31) | (1ul<<30) | (1ul<<0));
+
+ status = acpi_video_device_set_state(dev, state);
+
+ if (status)
+ return_VALUE(-EFAULT);
+
+ return_VALUE(count);
+}
+
+static int
+acpi_video_device_brightness_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
+ int i;
+
+ 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
+acpi_video_device_brightness_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_device_brightness_seq_show,
+ PDE(inode)->data);
+}
+
+static ssize_t
+acpi_video_device_write_brightness (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *data)
+{
+ 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;
+
+ ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
+
+ if (!dev || count + 1 > sizeof str)
+ return_VALUE(-EINVAL);
+
+ if (copy_from_user(str, buffer, count))
+ return_VALUE(-EFAULT);
+
+ str[count] = 0;
+ level = simple_strtoul(str, NULL, 0);
+
+ 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]) {
+ if (ACPI_SUCCESS(acpi_video_device_lcd_set_level(dev, level)))
+ dev->brightness->curr = level;
+ break;
+ }
+
+ return_VALUE(count);
+}
+
+static int
+acpi_video_device_EDID_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
+ int status;
+ int i;
+ union acpi_object *edid = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
+
+ if (!dev)
+ goto out;
+
+ status = acpi_video_device_EDID (dev, &edid, 128);
+ if (ACPI_FAILURE(status)) {
+ status = acpi_video_device_EDID (dev, &edid, 256);
+ }
+
+ 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]);
+ }
+
+out:
+ if (!edid)
+ seq_printf(seq, "<not supported>\n");
+ else
+ kfree(edid);
+
+ return_VALUE(0);
+}
+
+static int
+acpi_video_device_EDID_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_device_EDID_seq_show,
+ PDE(inode)->data);
+}
+
+
+static int
+acpi_video_device_add_fs (
+ struct acpi_device *device)
+{
+ struct proc_dir_entry *entry = NULL;
+ struct acpi_video_device *vid_dev;
+
+ ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
+
+ if (!device)
+ return_VALUE(-ENODEV);
+
+ vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
+ if (!vid_dev)
+ return_VALUE(-ENODEV);
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ vid_dev->video->dir);
+ 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,
+ "Unable to create 'info' fs entry\n"));
+ else {
+ entry->proc_fops = &acpi_video_device_info_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ /* 'state' [R/W] */
+ entry = create_proc_entry("state", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create 'state' fs entry\n"));
+ 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] */
+ entry = create_proc_entry("brightness", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create 'brightness' fs entry\n"));
+ 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,
+ "Unable to create 'brightness' fs entry\n"));
+ else {
+ entry->proc_fops = &acpi_video_device_EDID_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ return_VALUE(0);
+}
+
+static int
+acpi_video_device_remove_fs (
+ struct acpi_device *device)
+{
+ struct acpi_video_device *vid_dev;
+ ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
+
+ vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
+ 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));
+ remove_proc_entry(acpi_device_bid(device),
+ vid_dev->video->dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return_VALUE(0);
+}
+
+
+/* video bus */
+static int
+acpi_video_bus_info_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
+
+ if (!video)
+ goto end;
+
+ seq_printf(seq, "Switching heads: %s\n",
+ video->flags.multihead ? "yes":"no");
+ seq_printf(seq, "Video ROM: %s\n",
+ video->flags.rom ? "yes":"no");
+ seq_printf(seq, "Device to be POSTed on boot: %s\n",
+ video->flags.post ? "yes":"no");
+
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_info_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_bus_info_seq_show, PDE(inode)->data);
+}
+
+static int
+acpi_video_bus_ROM_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
+
+ 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");
+
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_ROM_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
+}
+
+static int
+acpi_video_bus_POST_info_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
+ unsigned long options;
+ int status;
+
+ 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)) {
+ 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");
+ }
+ 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");
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_POST_info_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_bus_POST_info_seq_show, PDE(inode)->data);
+}
+
+static int
+acpi_video_bus_POST_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
+ int status;
+ unsigned long id;
+ char device_decode[][30] = {
+ "motherboard VGA device",
+ "PCI VGA device",
+ "AGP VGA device",
+ "UNKNOWN",
+ };
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
+
+ if (!video)
+ goto end;
+
+ status = acpi_video_bus_get_POST (video, &id);
+ if (!ACPI_SUCCESS(status)) {
+ seq_printf(seq, "<not supported>\n");
+ goto end;
+ }
+ seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
+
+end:
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_DOS_seq_show (
+ struct seq_file *seq,
+ void *offset)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
+
+ seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting );
+
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_POST_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_bus_POST_seq_show, PDE(inode)->data);
+}
+
+static int
+acpi_video_bus_DOS_open_fs (
+ struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
+}
+
+static ssize_t
+acpi_video_bus_write_POST (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *data)
+{
+ 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;
+
+ 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)) {
+ status = acpi_video_bus_set_POST (video, opt);
+ if (!ACPI_SUCCESS(status))
+ return_VALUE(-EFAULT);
+
+ }
+
+
+ return_VALUE(count);
+}
+
+static ssize_t
+acpi_video_bus_write_DOS (
+ struct file *file,
+ const char __user *buffer,
+ size_t count,
+ loff_t *data)
+{
+ 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;
+
+ 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);
+
+ status = acpi_video_bus_DOS (video, opt & 0x3, (opt & 0x4)>>2);
+
+ if (!ACPI_SUCCESS(status))
+ return_VALUE(-EFAULT);
+
+ return_VALUE(count);
+}
+
+static int
+acpi_video_bus_add_fs (
+ struct acpi_device *device)
+{
+ struct proc_dir_entry *entry = NULL;
+ struct acpi_video_bus *video;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
+
+ video = (struct acpi_video_bus *) acpi_driver_data(device);
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ acpi_video_dir);
+ 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)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'info' fs entry\n"));
+ 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)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'ROM' fs entry\n"));
+ else {
+ entry->proc_fops = &acpi_video_bus_ROM_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ /* 'POST_info' [R] */
+ entry = create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST_info' fs entry\n"));
+ else {
+ entry->proc_fops = &acpi_video_bus_POST_info_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ /* 'POST' [R/W] */
+ entry = create_proc_entry("POST", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST' fs entry\n"));
+ 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] */
+ entry = create_proc_entry("DOS", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'DOS' fs entry\n"));
+ 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);
+}
+
+static int
+acpi_video_bus_remove_fs (
+ struct acpi_device *device)
+{
+ struct acpi_video_bus *video;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
+
+ video = (struct acpi_video_bus *) acpi_driver_data(device);
+
+ 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));
+ remove_proc_entry(acpi_device_bid(device),
+ acpi_video_dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return_VALUE(0);
+}
+
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
+
+/* device interface */
+
+static int
+acpi_video_bus_get_one_device (
+ struct acpi_device *device,
+ struct acpi_video_bus *video)
+{
+ unsigned long device_id;
+ int status, result;
+ struct acpi_video_device *data;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
+
+ if (!device || !video)
+ return_VALUE(-EINVAL);
+
+ status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
+ 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;
+ }
+
+ acpi_video_device_bind(video, data);
+ acpi_video_device_find_cap(data);
+
+ status = acpi_install_notify_handler(data->handle,
+ ACPI_DEVICE_NOTIFY, acpi_video_device_notify, data);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error installing notify handler\n"));
+ 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);
+ }
+
+end:
+ 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.
+ */
+
+static void
+acpi_video_device_rebind( struct acpi_video_bus *video)
+{
+ struct list_head * node, * next;
+ list_for_each_safe(node, next, &video->video_device_list) {
+ struct acpi_video_device * dev = container_of(node, struct acpi_video_device, entry);
+ acpi_video_device_bind( video, dev);
+ }
+}
+
+/*
+ * 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.
+ */
+
+static void
+acpi_video_device_bind( struct acpi_video_bus *video,
+ struct acpi_video_device *device)
+{
+ int i;
+ 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
+
+ for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
+ i < video->attached_count; i++) {
+ if (device->device_id == (IDS_VAL(i)& 0xffff)) {
+ 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
+ *
+ */
+
+static int acpi_video_device_enumerate(struct acpi_video_bus *video)
+{
+ int status;
+ int count;
+ int i;
+ struct acpi_video_enumerated_device *active_device_list;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *dod = NULL;
+ union acpi_object *obj;
+
+ 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);
+ }
+
+ dod = (union acpi_object *) buffer.pointer;
+ 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",
+ dod->package.count));
+
+ active_device_list= kmalloc(
+ dod->package.count*sizeof(struct acpi_video_enumerated_device),
+ GFP_KERNEL);
+
+ if (!active_device_list) {
+ status = -ENOMEM;
+ goto out;
+ }
+
+ count = 0;
+ for (i = 0; i < dod->package.count; i++) {
+ obj = (union acpi_object *) &dod->package.elements[i];
+
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
+ active_device_list[i].value.int_val = ACPI_VIDEO_HEAD_INVALID;
+ }
+ active_device_list[i].value.int_val = obj->integer.value;
+ active_device_list[i].bind_info = NULL;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, (int) obj->integer.value));
+ count++;
+ }
+ active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
+
+ if(video->attached_array)
+ kfree(video->attached_array);
+
+ video->attached_array = active_device_list;
+ video->attached_count = count;
+out:
+ 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.
+ */
+
+static int
+acpi_video_switch_output(
+ struct acpi_video_bus *video,
+ int event)
+{
+ 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;
+ unsigned long state;
+ int status = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_video_switch_output");
+
+ list_for_each_safe(node, next, &video->video_device_list) {
+ struct acpi_video_device * dev = container_of(node, struct acpi_video_device, entry);
+ status = acpi_video_device_get_state(dev, &state);
+ 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);
+ goto out;
+ }
+ }
+ dev_next = container_of(node->next, struct acpi_video_device, entry);
+ dev_prev = container_of(node->prev, struct acpi_video_device, entry);
+out:
+ 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);
+}
+
+static int
+acpi_video_get_next_level(
+ struct acpi_video_device *device,
+ u32 level_current,
+ u32 event)
+{
+ /*Fix me*/
+ return level_current;
+}
+
+
+static void
+acpi_video_switch_brightness (
+ struct acpi_video_device *device,
+ int event)
+{
+ 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
+acpi_video_bus_get_devices (
+ struct acpi_video_bus *video,
+ struct acpi_device *device)
+{
+ int status = 0;
+ struct list_head *node, *next;
+
+ ACPI_FUNCTION_TRACE("acpi_video_get_devices");
+
+ acpi_video_device_enumerate(video);
+
+ list_for_each_safe(node, next, &device->children) {
+ struct acpi_device *dev = list_entry(node, struct acpi_device, node);
+
+ if (!dev)
+ continue;
+
+ status = acpi_video_bus_get_one_device(dev, video);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Cant attach device\n"));
+ continue;
+ }
+
+ }
+ return_VALUE(status);
+}
+
+static int
+acpi_video_bus_put_one_device(
+ struct acpi_video_device *device)
+{
+ 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);
+
+ return_VALUE(0);
+}
+
+static int
+acpi_video_bus_put_devices (
+ struct acpi_video_bus *video)
+{
+ int status;
+ struct list_head *node, *next;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
+
+ list_for_each_safe(node, next, &video->video_device_list) {
+ struct acpi_video_device *data = list_entry(node, struct acpi_video_device, entry);
+ if (!data)
+ continue;
+
+ status = acpi_video_bus_put_one_device(data);
+ if(ACPI_FAILURE(status))
+ printk(KERN_WARNING PREFIX "hhuuhhuu bug in acpi video driver.\n");
+
+ if (data->brightness)
+ kfree(data->brightness);
+
+ kfree(data);
+ }
+
+ return_VALUE(0);
+}
+
+/* acpi_video interface */
+
+static int
+acpi_video_bus_start_devices(
+ struct acpi_video_bus *video)
+{
+ return acpi_video_bus_DOS(video, 1, 0);
+}
+
+static int
+acpi_video_bus_stop_devices(
+ struct acpi_video_bus *video)
+{
+ return acpi_video_bus_DOS(video, 0, 1);
+}
+
+static void
+acpi_video_bus_notify (
+ acpi_handle handle,
+ u32 event,
+ void *data)
+{
+ struct acpi_video_bus *video = (struct acpi_video_bus *) data;
+ struct acpi_device *device = NULL;
+
+ 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;
+
+ 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. */
+ acpi_video_switch_output(video, event);
+ acpi_bus_generate_event(device, event, 0);
+ break;
+
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return_VOID;
+}
+
+static void
+acpi_video_device_notify (
+ acpi_handle handle,
+ u32 event,
+ void *data)
+{
+ struct acpi_video_device *video_device = (struct acpi_video_device *) data;
+ struct acpi_device *device = NULL;
+
+ 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) {
+ case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
+ case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
+ acpi_bus_generate_event(device, event, 0);
+ break;
+ 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);
+ acpi_bus_generate_event(device, event, 0);
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+ return_VOID;
+}
+
+static int
+acpi_video_bus_add (
+ struct acpi_device *device)
+{
+ int result = 0;
+ acpi_status status = 0;
+ struct acpi_video_bus *video = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_add");
+
+ 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,
+ ACPI_DEVICE_NOTIFY, acpi_video_bus_notify, video);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error installing notify handler\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
+ ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
+ video->flags.multihead ? "yes":"no",
+ video->flags.rom ? "yes":"no",
+ video->flags.post ? "yes":"no");
+
+end:
+ if (result) {
+ acpi_video_bus_remove_fs(device);
+ kfree(video);
+ }
+
+ return_VALUE(result);
+}
+
+static int
+acpi_video_bus_remove (
+ struct acpi_device *device,
+ int type)
+{
+ acpi_status status = 0;
+ struct acpi_video_bus *video = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ video = (struct acpi_video_bus *) acpi_driver_data(device);
+
+ acpi_video_bus_stop_devices(video);
+
+ status = acpi_remove_notify_handler(video->handle,
+ ACPI_DEVICE_NOTIFY, acpi_video_bus_notify);
+ if (ACPI_FAILURE(status))
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error removing notify handler\n"));
+
+ acpi_video_bus_put_devices(video);
+ acpi_video_bus_remove_fs(device);
+
+ if (video->attached_array)
+ kfree(video->attached_array);
+ kfree(video);
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_video_bus_match (
+ struct acpi_device *device,
+ struct acpi_driver *driver)
+{
+ acpi_handle h_dummy1;
+ acpi_handle h_dummy2;
+ acpi_handle h_dummy3;
+
+ 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);
+}
+
+
+static int __init
+acpi_video_init (void)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_video_init");
+
+ /*
+ acpi_dbg_level = 0xFFFFFFFF;
+ acpi_dbg_layer = 0x08000000;
+ */
+
+ 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);
+}
+
+static void __exit
+acpi_video_exit (void)
+{
+ 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);
git://git.onelab.eu / linux-2.6.git / blobdiff