/drivers/acpi/video.c
https://bitbucket.org/evzijst/gittest · C · 1989 lines · 1463 code · 366 blank · 160 comment · 188 complexity · 5fc8d624c21760458560ea2ef2fb4fa6 MD5 · raw file
- /*
- * 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 char device_decode[][30] = {
- "motherboard VGA device",
- "PCI VGA device",
- "AGP VGA device",
- "UNKNOWN",
- };
- 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)
- -------------------------------------------------------------------------- */
- static 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;
- 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(
- (1+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);