diff options
Diffstat (limited to 'drivers/acpi/video.c')
| -rw-r--r-- | drivers/acpi/video.c | 1989 |
1 files changed, 1989 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c new file mode 100644 index 000000000000..71fa1011715f --- /dev/null +++ b/drivers/acpi/video.c @@ -0,0 +1,1989 @@ +/* + * 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); |
