| /* |
| * video.c - ACPI Video Driver ($Revision:$) |
| * |
| * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
| * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> |
| * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * 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/mutex.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/input.h> |
| #include <linux/backlight.h> |
| #include <linux/thermal.h> |
| #include <linux/video_output.h> |
| #include <linux/sort.h> |
| #include <linux/pci.h> |
| #include <linux/pci_ids.h> |
| #include <asm/uaccess.h> |
| |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| |
| #define ACPI_VIDEO_CLASS "video" |
| #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 0x85 |
| #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 |
| #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 |
| #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 |
| #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 |
| |
| #define MAX_NAME_LEN 20 |
| |
| #define ACPI_VIDEO_DISPLAY_CRT 1 |
| #define ACPI_VIDEO_DISPLAY_TV 2 |
| #define ACPI_VIDEO_DISPLAY_DVI 3 |
| #define ACPI_VIDEO_DISPLAY_LCD 4 |
| |
| #define _COMPONENT ACPI_VIDEO_COMPONENT |
| ACPI_MODULE_NAME("video"); |
| |
| MODULE_AUTHOR("Bruno Ducrot"); |
| MODULE_DESCRIPTION("ACPI Video Driver"); |
| MODULE_LICENSE("GPL"); |
| |
| static int brightness_switch_enabled = 1; |
| module_param(brightness_switch_enabled, bool, 0644); |
| |
| static int register_count = 0; |
| 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_resume(struct acpi_device *device); |
| static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
| |
| static const struct acpi_device_id video_device_ids[] = { |
| {ACPI_VIDEO_HID, 0}, |
| {"", 0}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, video_device_ids); |
| |
| static struct acpi_driver acpi_video_bus = { |
| .name = "video", |
| .class = ACPI_VIDEO_CLASS, |
| .ids = video_device_ids, |
| .ops = { |
| .add = acpi_video_bus_add, |
| .remove = acpi_video_bus_remove, |
| .resume = acpi_video_resume, |
| .notify = acpi_video_bus_notify, |
| }, |
| }; |
| |
| 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 differentiates the display type */ |
| u32 display_type:4; /*Describe the specific type in use */ |
| u32 vendor_specific:4; /*Chipset Vendor Specific */ |
| 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 { |
| struct acpi_device *device; |
| 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 list_head video_device_list; |
| struct mutex device_list_lock; /* protects video_device_list */ |
| struct proc_dir_entry *dir; |
| struct input_dev *input; |
| char phys[32]; /* for input device */ |
| }; |
| |
| struct acpi_video_device_flags { |
| u8 crt:1; |
| u8 lcd:1; |
| u8 tvout:1; |
| u8 dvi:1; |
| u8 bios:1; |
| u8 unknown:1; |
| u8 reserved:2; |
| }; |
| |
| 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 _BQC:1; /* Get current brightness level */ |
| u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
| 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 */ |
| }; |
| |
| struct acpi_video_brightness_flags { |
| u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ |
| u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
| u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
| u8 _BCM_use_index:1; /* input of _BCM is an index value */ |
| u8 _BQC_use_index:1; /* _BQC returns an index value */ |
| }; |
| |
| struct acpi_video_device_brightness { |
| int curr; |
| int count; |
| int *levels; |
| struct acpi_video_brightness_flags flags; |
| }; |
| |
| struct acpi_video_device { |
| 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; |
| struct backlight_device *backlight; |
| struct thermal_cooling_device *cdev; |
| struct output_device *output_dev; |
| }; |
| |
| /* bus */ |
| static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file); |
| static const struct file_operations acpi_video_bus_info_fops = { |
| .owner = THIS_MODULE, |
| .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 const struct file_operations acpi_video_bus_ROM_fops = { |
| .owner = THIS_MODULE, |
| .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 const struct file_operations acpi_video_bus_POST_info_fops = { |
| .owner = THIS_MODULE, |
| .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 ssize_t acpi_video_bus_write_POST(struct file *file, |
| const char __user *buffer, size_t count, loff_t *data); |
| static const struct file_operations acpi_video_bus_POST_fops = { |
| .owner = THIS_MODULE, |
| .open = acpi_video_bus_POST_open_fs, |
| .read = seq_read, |
| .write = acpi_video_bus_write_POST, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file); |
| static ssize_t acpi_video_bus_write_DOS(struct file *file, |
| const char __user *buffer, size_t count, loff_t *data); |
| static const struct file_operations acpi_video_bus_DOS_fops = { |
| .owner = THIS_MODULE, |
| .open = acpi_video_bus_DOS_open_fs, |
| .read = seq_read, |
| .write = acpi_video_bus_write_DOS, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| /* device */ |
| static int acpi_video_device_info_open_fs(struct inode *inode, |
| struct file *file); |
| static const struct file_operations acpi_video_device_info_fops = { |
| .owner = THIS_MODULE, |
| .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 ssize_t acpi_video_device_write_state(struct file *file, |
| const char __user *buffer, size_t count, loff_t *data); |
| static const struct file_operations acpi_video_device_state_fops = { |
| .owner = THIS_MODULE, |
| .open = acpi_video_device_state_open_fs, |
| .read = seq_read, |
| .write = acpi_video_device_write_state, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int acpi_video_device_brightness_open_fs(struct inode *inode, |
| struct file *file); |
| static ssize_t acpi_video_device_write_brightness(struct file *file, |
| const char __user *buffer, size_t count, loff_t *data); |
| static struct file_operations acpi_video_device_brightness_fops = { |
| .owner = THIS_MODULE, |
| .open = acpi_video_device_brightness_open_fs, |
| .read = seq_read, |
| .write = acpi_video_device_write_brightness, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int acpi_video_device_EDID_open_fs(struct inode *inode, |
| struct file *file); |
| static const struct file_operations acpi_video_device_EDID_fops = { |
| .owner = THIS_MODULE, |
| .open = acpi_video_device_EDID_open_fs, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static const 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_device_lcd_set_level(struct acpi_video_device *device, |
| int level); |
| static int acpi_video_device_lcd_get_level_current( |
| struct acpi_video_device *device, |
| unsigned long long *level); |
| static int acpi_video_get_next_level(struct acpi_video_device *device, |
| u32 level_current, u32 event); |
| static int acpi_video_switch_brightness(struct acpi_video_device *device, |
| int event); |
| static int acpi_video_device_get_state(struct acpi_video_device *device, |
| unsigned long long *state); |
| static int acpi_video_output_get(struct output_device *od); |
| static int acpi_video_device_set_state(struct acpi_video_device *device, int state); |
| |
| /*backlight device sysfs support*/ |
| static int acpi_video_get_brightness(struct backlight_device *bd) |
| { |
| unsigned long long cur_level; |
| int i; |
| struct acpi_video_device *vd = |
| (struct acpi_video_device *)bl_get_data(bd); |
| |
| if (acpi_video_device_lcd_get_level_current(vd, &cur_level)) |
| return -EINVAL; |
| for (i = 2; i < vd->brightness->count; i++) { |
| if (vd->brightness->levels[i] == cur_level) |
| /* The first two entries are special - see page 575 |
| of the ACPI spec 3.0 */ |
| return i-2; |
| } |
| return 0; |
| } |
| |
| static int acpi_video_set_brightness(struct backlight_device *bd) |
| { |
| int request_level = bd->props.brightness + 2; |
| struct acpi_video_device *vd = |
| (struct acpi_video_device *)bl_get_data(bd); |
| |
| return acpi_video_device_lcd_set_level(vd, |
| vd->brightness->levels[request_level]); |
| } |
| |
| static struct backlight_ops acpi_backlight_ops = { |
| .get_brightness = acpi_video_get_brightness, |
| .update_status = acpi_video_set_brightness, |
| }; |
| |
| /*video output device sysfs support*/ |
| static int acpi_video_output_get(struct output_device *od) |
| { |
| unsigned long long state; |
| struct acpi_video_device *vd = |
| (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
| acpi_video_device_get_state(vd, &state); |
| return (int)state; |
| } |
| |
| static int acpi_video_output_set(struct output_device *od) |
| { |
| unsigned long state = od->request_state; |
| struct acpi_video_device *vd= |
| (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
| return acpi_video_device_set_state(vd, state); |
| } |
| |
| static struct output_properties acpi_output_properties = { |
| .set_state = acpi_video_output_set, |
| .get_status = acpi_video_output_get, |
| }; |
| |
| |
| /* thermal cooling device callbacks */ |
| static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned |
| long *state) |
| { |
| struct acpi_device *device = cdev->devdata; |
| struct acpi_video_device *video = acpi_driver_data(device); |
| |
| *state = video->brightness->count - 3; |
| return 0; |
| } |
| |
| static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned |
| long *state) |
| { |
| struct acpi_device *device = cdev->devdata; |
| struct acpi_video_device *video = acpi_driver_data(device); |
| unsigned long long level; |
| int offset; |
| |
| if (acpi_video_device_lcd_get_level_current(video, &level)) |
| return -EINVAL; |
| for (offset = 2; offset < video->brightness->count; offset++) |
| if (level == video->brightness->levels[offset]) { |
| *state = video->brightness->count - offset - 1; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int |
| video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) |
| { |
| struct acpi_device *device = cdev->devdata; |
| struct acpi_video_device *video = acpi_driver_data(device); |
| int level; |
| |
| if ( state >= video->brightness->count - 2) |
| return -EINVAL; |
| |
| state = video->brightness->count - state; |
| level = video->brightness->levels[state -1]; |
| return acpi_video_device_lcd_set_level(video, level); |
| } |
| |
| static struct thermal_cooling_device_ops video_cooling_ops = { |
| .get_max_state = video_get_max_state, |
| .get_cur_state = video_get_cur_state, |
| .set_cur_state = video_set_cur_state, |
| }; |
| |
| /* -------------------------------------------------------------------------- |
| Video Management |
| -------------------------------------------------------------------------- */ |
| |
| /* device */ |
| |
| static int |
| acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state) |
| { |
| int status; |
| |
| status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state); |
| |
| return status; |
| } |
| |
| static int |
| acpi_video_device_get_state(struct acpi_video_device *device, |
| unsigned long long *state) |
| { |
| int status; |
| |
| status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state); |
| |
| return 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 }; |
| unsigned long long ret; |
| |
| |
| arg0.integer.value = state; |
| status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret); |
| |
| return 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; |
| |
| |
| *levels = NULL; |
| |
| status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
| if (!ACPI_SUCCESS(status)) |
| return status; |
| obj = (union acpi_object *)buffer.pointer; |
| if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
| printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
| status = -EFAULT; |
| goto err; |
| } |
| |
| *levels = obj; |
| |
| return 0; |
| |
| err: |
| kfree(buffer.pointer); |
| |
| return 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 }; |
| int state; |
| |
| arg0.integer.value = level; |
| |
| status = acpi_evaluate_object(device->dev->handle, "_BCM", |
| &args, NULL); |
| if (ACPI_FAILURE(status)) { |
| ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); |
| return -EIO; |
| } |
| |
| device->brightness->curr = level; |
| for (state = 2; state < device->brightness->count; state++) |
| if (level == device->brightness->levels[state]) { |
| if (device->backlight) |
| device->backlight->props.brightness = state - 2; |
| return 0; |
| } |
| |
| ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
| return -EINVAL; |
| } |
| |
| /* |
| * For some buggy _BQC methods, we need to add a constant value to |
| * the _BQC return value to get the actual current brightness level |
| */ |
| |
| static int bqc_offset_aml_bug_workaround; |
| static int __init video_set_bqc_offset(const struct dmi_system_id *d) |
| { |
| bqc_offset_aml_bug_workaround = 9; |
| return 0; |
| } |
| |
| static struct dmi_system_id video_dmi_table[] __initdata = { |
| /* |
| * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 |
| */ |
| { |
| .callback = video_set_bqc_offset, |
| .ident = "Acer Aspire 5720", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), |
| }, |
| }, |
| { |
| .callback = video_set_bqc_offset, |
| .ident = "Acer Aspire 5710Z", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), |
| }, |
| }, |
| { |
| .callback = video_set_bqc_offset, |
| .ident = "eMachines E510", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), |
| }, |
| }, |
| { |
| .callback = video_set_bqc_offset, |
| .ident = "Acer Aspire 5315", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), |
| }, |
| }, |
| { |
| .callback = video_set_bqc_offset, |
| .ident = "Acer Aspire 7720", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), |
| }, |
| }, |
| {} |
| }; |
| |
| static int |
| acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
| unsigned long long *level) |
| { |
| acpi_status status = AE_OK; |
| |
| if (device->cap._BQC || device->cap._BCQ) { |
| char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; |
| |
| status = acpi_evaluate_integer(device->dev->handle, buf, |
| NULL, level); |
| if (ACPI_SUCCESS(status)) { |
| if (device->brightness->flags._BQC_use_index) { |
| if (device->brightness->flags._BCL_reversed) |
| *level = device->brightness->count |
| - 3 - (*level); |
| *level = device->brightness->levels[*level + 2]; |
| |
| } |
| *level += bqc_offset_aml_bug_workaround; |
| device->brightness->curr = *level; |
| return 0; |
| } else { |
| /* Fixme: |
| * should we return an error or ignore this failure? |
| * dev->brightness->curr is a cached value which stores |
| * the correct current backlight level in most cases. |
| * ACPI video backlight still works w/ buggy _BQC. |
| * http://bugzilla.kernel.org/show_bug.cgi?id=12233 |
| */ |
| ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
| device->cap._BQC = device->cap._BCQ = 0; |
| } |
| } |
| |
| *level = device->brightness->curr; |
| return 0; |
| } |
| |
| 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 }; |
| |
| |
| *edid = NULL; |
| |
| if (!device) |
| return -ENODEV; |
| if (length == 128) |
| arg0.integer.value = 1; |
| else if (length == 256) |
| arg0.integer.value = 2; |
| else |
| return -EINVAL; |
| |
| status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| |
| obj = buffer.pointer; |
| |
| if (obj && obj->type == ACPI_TYPE_BUFFER) |
| *edid = obj; |
| else { |
| printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
| status = -EFAULT; |
| kfree(obj); |
| } |
| |
| return status; |
| } |
| |
| /* bus */ |
| |
| static int |
| acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option) |
| { |
| int status; |
| unsigned long long tmp; |
| union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
| struct acpi_object_list args = { 1, &arg0 }; |
| |
| |
| arg0.integer.value = option; |
| |
| status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp); |
| if (ACPI_SUCCESS(status)) |
| status = tmp ? (-EINVAL) : (AE_OK); |
| |
| return status; |
| } |
| |
| static int |
| acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id) |
| { |
| int status; |
| |
| status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id); |
| |
| return status; |
| } |
| |
| static int |
| acpi_video_bus_POST_options(struct acpi_video_bus *video, |
| unsigned long long *options) |
| { |
| int status; |
| |
| status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options); |
| *options &= 3; |
| |
| return 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 switch 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 }; |
| |
| |
| 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->device->handle, "_DOS", &args, NULL); |
| |
| Failed: |
| return status; |
| } |
| |
| /* |
| * Simple comparison function used to sort backlight levels. |
| */ |
| |
| static int |
| acpi_video_cmp_level(const void *a, const void *b) |
| { |
| return *(int *)a - *(int *)b; |
| } |
| |
| /* |
| * Arg: |
| * device : video output device (LCD, CRT, ..) |
| * |
| * Return Value: |
| * Maximum brightness level |
| * |
| * Allocate and initialize device->brightness. |
| */ |
| |
| static int |
| acpi_video_init_brightness(struct acpi_video_device *device) |
| { |
| union acpi_object *obj = NULL; |
| int i, max_level = 0, count = 0, level_ac_battery = 0; |
| unsigned long long level, level_old; |
| union acpi_object *o; |
| struct acpi_video_device_brightness *br = NULL; |
| int result = -EINVAL; |
| |
| if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " |
| "LCD brightness level\n")); |
| goto out; |
| } |
| |
| if (obj->package.count < 2) |
| goto out; |
| |
| br = kzalloc(sizeof(*br), GFP_KERNEL); |
| if (!br) { |
| printk(KERN_ERR "can't allocate memory\n"); |
| result = -ENOMEM; |
| goto out; |
| } |
| |
| br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
| GFP_KERNEL); |
| if (!br->levels) { |
| result = -ENOMEM; |
| goto out_free; |
| } |
| |
| for (i = 0; i < obj->package.count; i++) { |
| o = (union acpi_object *)&obj->package.elements[i]; |
| if (o->type != ACPI_TYPE_INTEGER) { |
| printk(KERN_ERR PREFIX "Invalid data\n"); |
| continue; |
| } |
| br->levels[count] = (u32) o->integer.value; |
| |
| if (br->levels[count] > max_level) |
| max_level = br->levels[count]; |
| count++; |
| } |
| |
| /* |
| * some buggy BIOS don't export the levels |
| * when machine is on AC/Battery in _BCL package. |
| * In this case, the first two elements in _BCL packages |
| * are also supported brightness levels that OS should take care of. |
| */ |
| for (i = 2; i < count; i++) { |
| if (br->levels[i] == br->levels[0]) |
| level_ac_battery++; |
| if (br->levels[i] == br->levels[1]) |
| level_ac_battery++; |
| } |
| |
| if (level_ac_battery < 2) { |
| level_ac_battery = 2 - level_ac_battery; |
| br->flags._BCL_no_ac_battery_levels = 1; |
| for (i = (count - 1 + level_ac_battery); i >= 2; i--) |
| br->levels[i] = br->levels[i - level_ac_battery]; |
| count += level_ac_battery; |
| } else if (level_ac_battery > 2) |
| ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n")); |
| |
| /* Check if the _BCL package is in a reversed order */ |
| if (max_level == br->levels[2]) { |
| br->flags._BCL_reversed = 1; |
| sort(&br->levels[2], count - 2, sizeof(br->levels[2]), |
| acpi_video_cmp_level, NULL); |
| } else if (max_level != br->levels[count - 1]) |
| ACPI_ERROR((AE_INFO, |
| "Found unordered _BCL package\n")); |
| |
| br->count = count; |
| device->brightness = br; |
| |
| /* Check the input/output of _BQC/_BCL/_BCM */ |
| if ((max_level < 100) && (max_level <= (count - 2))) |
| br->flags._BCL_use_index = 1; |
| |
| /* |
| * _BCM is always consistent with _BCL, |
| * at least for all the laptops we have ever seen. |
| */ |
| br->flags._BCM_use_index = br->flags._BCL_use_index; |
| |
| /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
| br->curr = level_old = max_level; |
| |
| if (!device->cap._BQC) |
| goto set_level; |
| |
| result = acpi_video_device_lcd_get_level_current(device, &level_old); |
| if (result) |
| goto out_free_levels; |
| |
| /* |
| * Set the level to maximum and check if _BQC uses indexed value |
| */ |
| result = acpi_video_device_lcd_set_level(device, max_level); |
| if (result) |
| goto out_free_levels; |
| |
| result = acpi_video_device_lcd_get_level_current(device, &level); |
| if (result) |
| goto out_free_levels; |
| |
| br->flags._BQC_use_index = (level == max_level ? 0 : 1); |
| |
| if (!br->flags._BQC_use_index) |
| goto set_level; |
| |
| if (br->flags._BCL_reversed) |
| level_old = (br->count - 1) - level_old; |
| level_old = br->levels[level_old]; |
| |
| set_level: |
| result = acpi_video_device_lcd_set_level(device, level_old); |
| if (result) |
| goto out_free_levels; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "found %d brightness levels\n", count - 2)); |
| kfree(obj); |
| return result; |
| |
| out_free_levels: |
| kfree(br->levels); |
| out_free: |
| kfree(br); |
| out: |
| device->brightness = NULL; |
| kfree(obj); |
| return result; |
| } |
| |
| /* |
| * Arg: |
| * device : video output device (LCD, CRT, ..) |
| * |
| * Return Value: |
| * None |
| * |
| * Find out all required AML methods defined under the output |
| * device. |
| */ |
| |
| static void acpi_video_device_find_cap(struct acpi_video_device *device) |
| { |
| acpi_handle h_dummy1; |
| |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
| device->cap._ADR = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
| device->cap._BCL = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
| device->cap._BCM = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
| device->cap._BQC = 1; |
| else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
| &h_dummy1))) { |
| printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
| device->cap._BCQ = 1; |
| } |
| |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
| device->cap._DDC = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) { |
| device->cap._DCS = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) { |
| device->cap._DGS = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) { |
| device->cap._DSS = 1; |
| } |
| |
| if (acpi_video_backlight_support()) { |
| int result; |
| static int count = 0; |
| char *name; |
| |
| result = acpi_video_init_brightness(device); |
| if (result) |
| return; |
| name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); |
| if (!name) |
| return; |
| |
| sprintf(name, "acpi_video%d", count++); |
| device->backlight = backlight_device_register(name, |
| NULL, device, &acpi_backlight_ops); |
| device->backlight->props.max_brightness = device->brightness->count-3; |
| kfree(name); |
| |
| result = sysfs_create_link(&device->backlight->dev.kobj, |
| &device->dev->dev.kobj, "device"); |
| if (result) |
| printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| |
| device->cdev = thermal_cooling_device_register("LCD", |
| device->dev, &video_cooling_ops); |
| if (IS_ERR(device->cdev)) |
| return; |
| |
| dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
| device->cdev->id); |
| result = sysfs_create_link(&device->dev->dev.kobj, |
| &device->cdev->device.kobj, |
| "thermal_cooling"); |
| if (result) |
| printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| result = sysfs_create_link(&device->cdev->device.kobj, |
| &device->dev->dev.kobj, "device"); |
| if (result) |
| printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| |
| } |
| |
| if (acpi_video_display_switch_support()) { |
| |
| if (device->cap._DCS && device->cap._DSS) { |
| static int count; |
| char *name; |
| name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); |
| if (!name) |
| return; |
| sprintf(name, "acpi_video%d", count++); |
| device->output_dev = video_output_register(name, |
| NULL, device, &acpi_output_properties); |
| kfree(name); |
| } |
| } |
| } |
| |
| /* |
| * Arg: |
| * device : video output device (VGA) |
| * |
| * Return Value: |
| * None |
| * |
| * Find out all required AML methods defined under the video bus device. |
| */ |
| |
| static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
| { |
| acpi_handle h_dummy1; |
| |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
| video->cap._DOS = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
| video->cap._DOD = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
| video->cap._ROM = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
| video->cap._GPD = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
| video->cap._SPD = 1; |
| } |
| if (ACPI_SUCCESS(acpi_get_handle(video->device->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; |
| struct pci_dev *dev; |
| |
| if (!video) |
| return -EINVAL; |
| |
| dev = acpi_get_pci_dev(video->device->handle); |
| if (!dev) |
| return -ENODEV; |
| pci_dev_put(dev); |
| |
| /* Since there is no HID, CID and so on for VGA driver, we have |
| * to check well known required nodes. |
| */ |
| |
| /* Does this device support video switching? */ |
| if (video->cap._DOS) { |
| video->flags.multihead = 1; |
| status = 0; |
| } |
| |
| /* Does this device support retrieving a video ROM? */ |
| if (video->cap._ROM) { |
| video->flags.rom = 1; |
| status = 0; |
| } |
| |
| /* Does this device support configuring which video device to POST? */ |
| if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
| video->flags.post = 1; |
| status = 0; |
| } |
| |
| return 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 = seq->private; |
| |
| |
| 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 if (dev->flags.dvi) |
| seq_printf(seq, "DVI\n"); |
| else |
| seq_printf(seq, "UNKNOWN\n"); |
| |
| seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no"); |
| |
| end: |
| return 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 = seq->private; |
| unsigned long long state; |
| |
| |
| if (!dev) |
| goto end; |
| |
| status = acpi_video_device_get_state(dev, &state); |
| seq_printf(seq, "state: "); |
| if (ACPI_SUCCESS(status)) |
| seq_printf(seq, "0x%02llx\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%02llx\n", state); |
| else |
| seq_printf(seq, "<not supported>\n"); |
| |
| end: |
| return 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 = file->private_data; |
| struct acpi_video_device *dev = m->private; |
| char str[12] = { 0 }; |
| u32 state = 0; |
| |
| |
| if (!dev || count + 1 > sizeof str) |
| return -EINVAL; |
| |
| if (copy_from_user(str, buffer, count)) |
| return -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 -EFAULT; |
| |
| return count; |
| } |
| |
| static int |
| acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset) |
| { |
| struct acpi_video_device *dev = seq->private; |
| int i; |
| |
| |
| if (!dev || !dev->brightness) { |
| seq_printf(seq, "<not supported>\n"); |
| return 0; |
| } |
| |
| seq_printf(seq, "levels: "); |
| for (i = 2; i < dev->brightness->count; i++) |
| seq_printf(seq, " %d", dev->brightness->levels[i]); |
| seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr); |
| |
| return 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 = file->private_data; |
| struct acpi_video_device *dev = m->private; |
| char str[5] = { 0 }; |
| unsigned int level = 0; |
| int i; |
| |
| |
| if (!dev || !dev->brightness || count + 1 > sizeof str) |
| return -EINVAL; |
| |
| if (copy_from_user(str, buffer, count)) |
| return -EFAULT; |
| |
| str[count] = 0; |
| level = simple_strtoul(str, NULL, 0); |
| |
| if (level > 100) |
| return -EFAULT; |
| |
| /* validate through the list of available levels */ |
| for (i = 2; i < dev->brightness->count; i++) |
| if (level == dev->brightness->levels[i]) { |
| if (!acpi_video_device_lcd_set_level(dev, level)) |
| return count; |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset) |
| { |
| struct acpi_video_device *dev = seq->private; |
| int status; |
| int i; |
| union acpi_object *edid = NULL; |
| |
| |
| 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 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, *device_dir; |
| struct acpi_video_device *vid_dev; |
| |
| vid_dev = acpi_driver_data(device); |
| if (!vid_dev) |
| return -ENODEV; |
| |
| device_dir = proc_mkdir(acpi_device_bid(device), |
| vid_dev->video->dir); |
| if (!device_dir) |
| return -ENOMEM; |
| |
| /* 'info' [R] */ |
| entry = proc_create_data("info", S_IRUGO, device_dir, |
| &acpi_video_device_info_fops, acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_dir; |
| |
| /* 'state' [R/W] */ |
| entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR, |
| device_dir, |
| &acpi_video_device_state_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_info; |
| |
| /* 'brightness' [R/W] */ |
| entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR, |
| device_dir, |
| &acpi_video_device_brightness_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_state; |
| |
| /* 'EDID' [R] */ |
| entry = proc_create_data("EDID", S_IRUGO, device_dir, |
| &acpi_video_device_EDID_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_brightness; |
| |
| acpi_device_dir(device) = device_dir; |
| |
| return 0; |
| |
| err_remove_brightness: |
| remove_proc_entry("brightness", device_dir); |
| err_remove_state: |
| remove_proc_entry("state", device_dir); |
| err_remove_info: |
| remove_proc_entry("info", device_dir); |
| err_remove_dir: |
| remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); |
| return -ENOMEM; |
| } |
| |
| static int acpi_video_device_remove_fs(struct acpi_device *device) |
| { |
| struct acpi_video_device *vid_dev; |
| struct proc_dir_entry *device_dir; |
| |
| vid_dev = acpi_driver_data(device); |
| if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) |
| return -ENODEV; |
| |
| device_dir = acpi_device_dir(device); |
| if (device_dir) { |
| remove_proc_entry("info", device_dir); |
| remove_proc_entry("state", device_dir); |
| remove_proc_entry("brightness", device_dir); |
| remove_proc_entry("EDID", device_dir); |
| remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); |
| acpi_device_dir(device) = NULL; |
| } |
| |
| return 0; |
| } |
| |
| /* video bus */ |
| static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset) |
| { |
| struct acpi_video_bus *video = seq->private; |
| |
| |
| 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 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 = seq->private; |
| |
| |
| if (!video) |
| goto end; |
| |
| printk(KERN_INFO PREFIX "Please implement %s\n", __func__); |
| seq_printf(seq, "<TODO>\n"); |
| |
| end: |
| return 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 = seq->private; |
| unsigned long long options; |
| int status; |
| |
| |
| 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 indicates a BIOS bug. Please contact the manufacturer.\n"); |
| } |
| printk(KERN_WARNING "%llx\n", options); |
| seq_printf(seq, "can POST: <integrated 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 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 = seq->private; |
| int status; |
| unsigned long long id; |
| |
| |
| 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 0; |
| } |
| |
| static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset) |
| { |
| struct acpi_video_bus *video = seq->private; |
| |
| |
| seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting); |
| |
| return 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 = file->private_data; |
| struct acpi_video_bus *video = m->private; |
| char str[12] = { 0 }; |
| unsigned long long opt, options; |
| |
| |
| if (!video || count + 1 > sizeof str) |
| return -EINVAL; |
| |
| status = acpi_video_bus_POST_options(video, &options); |
| if (!ACPI_SUCCESS(status)) |
| return -EINVAL; |
| |
| if (copy_from_user(str, buffer, count)) |
| return -EFAULT; |
| |
| str[count] = 0; |
| opt = strtoul(str, NULL, 0); |
| if (opt > 3) |
| return -EFAULT; |
| |
| /* just in case an OEM 'forgot' the motherboard... */ |
| options |= 1; |
| |
| if (options & (1ul << opt)) { |
| status = acpi_video_bus_set_POST(video, opt); |
| if (!ACPI_SUCCESS(status)) |
| return -EFAULT; |
| |
| } |
| |
| return 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 = file->private_data; |
| struct acpi_video_bus *video = m->private; |
| char str[12] = { 0 }; |
| unsigned long opt; |
| |
| |
| if (!video || count + 1 > sizeof str) |
| return -EINVAL; |
| |
| if (copy_from_user(str, buffer, count)) |
| return -EFAULT; |
| |
| str[count] = 0; |
| opt = strtoul(str, NULL, 0); |
| if (opt > 7) |
| return -EFAULT; |
| |
| status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2); |
| |
| if (!ACPI_SUCCESS(status)) |
| return -EFAULT; |
| |
| return count; |
| } |
| |
| static int acpi_video_bus_add_fs(struct acpi_device *device) |
| { |
| struct acpi_video_bus *video = acpi_driver_data(device); |
| struct proc_dir_entry *device_dir; |
| struct proc_dir_entry *entry; |
| |
| device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir); |
| if (!device_dir) |
| return -ENOMEM; |
| |
| /* 'info' [R] */ |
| entry = proc_create_data("info", S_IRUGO, device_dir, |
| &acpi_video_bus_info_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_dir; |
| |
| /* 'ROM' [R] */ |
| entry = proc_create_data("ROM", S_IRUGO, device_dir, |
| &acpi_video_bus_ROM_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_info; |
| |
| /* 'POST_info' [R] */ |
| entry = proc_create_data("POST_info", S_IRUGO, device_dir, |
| &acpi_video_bus_POST_info_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_rom; |
| |
| /* 'POST' [R/W] */ |
| entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR, |
| device_dir, |
| &acpi_video_bus_POST_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_post_info; |
| |
| /* 'DOS' [R/W] */ |
| entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR, |
| device_dir, |
| &acpi_video_bus_DOS_fops, |
| acpi_driver_data(device)); |
| if (!entry) |
| goto err_remove_post; |
| |
| video->dir = acpi_device_dir(device) = device_dir; |
| return 0; |
| |
| err_remove_post: |
| remove_proc_entry("POST", device_dir); |
| err_remove_post_info: |
| remove_proc_entry("POST_info", device_dir); |
| err_remove_rom: |
| remove_proc_entry("ROM", device_dir); |
| err_remove_info: |
| remove_proc_entry("info", device_dir); |
| err_remove_dir: |
| remove_proc_entry(acpi_device_bid(device), acpi_video_dir); |
| return -ENOMEM; |
| } |
| |
| static int acpi_video_bus_remove_fs(struct acpi_device *device) |
| { |
| struct proc_dir_entry *device_dir = acpi_device_dir(device); |
| |
| if (device_dir) { |
| remove_proc_entry("info", device_dir); |
| remove_proc_entry("ROM", device_dir); |
| remove_proc_entry("POST_info", device_dir); |
| remove_proc_entry("POST", device_dir); |
| remove_proc_entry("DOS", device_dir); |
| remove_proc_entry(acpi_device_bid(device), acpi_video_dir); |
| acpi_device_dir(device) = NULL; |
| } |
| |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| Driver Interface |
| -------------------------------------------------------------------------- */ |
| |
| /* device interface */ |
| static struct acpi_video_device_attrib* |
| acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
| { |
| struct acpi_video_enumerated_device *ids; |
| int i; |
| |
| for (i = 0; i < video->attached_count; i++) { |
| ids = &video->attached_array[i]; |
| if ((ids->value.int_val & 0xffff) == device_id) |
| return &ids->value.attrib; |
| } |
| |
| return NULL; |
| } |
| |
| static int |
| acpi_video_bus_get_one_device(struct acpi_device *device, |
| struct acpi_video_bus *video) |
| { |
| unsigned long long device_id; |
| int status; |
| struct acpi_video_device *data; |
| struct acpi_video_device_attrib* attribute; |
| |
| if (!device || !video) |
| return -EINVAL; |
| |
| status = |
| acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); |
| if (ACPI_SUCCESS(status)) { |
| |
| data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
| strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); |
| device->driver_data = data; |
| |
| data->device_id = device_id; |
| data->video = video; |
| data->dev = device; |
| |
| attribute = acpi_video_get_device_attr(video, device_id); |
| |
| if((attribute != NULL) && attribute->device_id_scheme) { |
| switch (attribute->display_type) { |
| case ACPI_VIDEO_DISPLAY_CRT: |
| data->flags.crt = 1; |
| break; |
| case ACPI_VIDEO_DISPLAY_TV: |
| data->flags.tvout = 1; |
| break; |
| case ACPI_VIDEO_DISPLAY_DVI: |
| data->flags.dvi = 1; |
| break; |
| case ACPI_VIDEO_DISPLAY_LCD: |
| data->flags.lcd = 1; |
| break; |
| default: |
| data->flags.unknown = 1; |
| break; |
| } |
| if(attribute->bios_can_detect) |
| data->flags.bios = 1; |
| } else |
| data->flags.unknown = 1; |
| |
| acpi_video_device_bind(video, data); |
| acpi_video_device_find_cap(data); |
| |
| status = acpi_install_notify_handler(device->handle, |
| ACPI_DEVICE_NOTIFY, |
| acpi_video_device_notify, |
| data); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Error installing notify handler\n"); |
| if(data->brightness) |
| kfree(data->brightness->levels); |
| kfree(data->brightness); |
| kfree(data); |
| return -ENODEV; |
| } |
| |
| mutex_lock(&video->device_list_lock); |
| list_add_tail(&data->entry, &video->video_device_list); |
| mutex_unlock(&video->device_list_lock); |
| |
| acpi_video_device_add_fs(device); |
| |
| return 0; |
| } |
| |
| return -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 acpi_video_device *dev; |
| |
| mutex_lock(&video->device_list_lock); |
| |
| list_for_each_entry(dev, &video->video_device_list, entry) |
| acpi_video_device_bind(video, dev); |
| |
| mutex_unlock(&video->device_list_lock); |
| } |
| |
| /* |
| * 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) |
| { |
| struct acpi_video_enumerated_device *ids; |
| int i; |
| |
| for (i = 0; i < video->attached_count; i++) { |
| ids = &video->attached_array[i]; |
| if (device->device_id == (ids->value.int_val & 0xffff)) { |
| ids->bind_info = device; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
| } |
| } |
| } |
| |
| /* |
| * 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_list; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| union acpi_object *dod = NULL; |
| union acpi_object *obj; |
| |
| status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
| if (!ACPI_SUCCESS(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
| return status; |
| } |
| |
| dod = buffer.pointer; |
| if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
| status = -EFAULT; |
| goto out; |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", |
| dod->package.count)); |
| |
| active_list = kcalloc(1 + dod->package.count, |
| sizeof(struct acpi_video_enumerated_device), |
| GFP_KERNEL); |
| if (!active_list) { |
| status = -ENOMEM; |
| goto out; |
| } |
| |
| count = 0; |
| for (i = 0; i < dod->package.count; i++) { |
| obj = &dod->package.elements[i]; |
| |
| if (obj->type != ACPI_TYPE_INTEGER) { |
| printk(KERN_ERR PREFIX |
| "Invalid _DOD data in element %d\n", i); |
| continue; |
| } |
| |
| active_list[count].value.int_val = obj->integer.value; |
| active_list[count].bind_info = NULL; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
| (int)obj->integer.value)); |
| count++; |
| } |
| |
| kfree(video->attached_array); |
| |
| video->attached_array = active_list; |
| video->attached_count = count; |
| |
| out: |
| kfree(buffer.pointer); |
| return status; |
| } |
| |
| static int |
| acpi_video_get_next_level(struct acpi_video_device *device, |
| u32 level_current, u32 event) |
| { |
| int min, max, min_above, max_below, i, l, delta = 255; |
| max = max_below = 0; |
| min = min_above = 255; |
| /* Find closest level to level_current */ |
| for (i = 2; i < device->brightness->count; i++) { |
| l = device->brightness->levels[i]; |
| if (abs(l - level_current) < abs(delta)) { |
| delta = l - level_current; |
| if (!delta) |
| break; |
| } |
| } |
| /* Ajust level_current to closest available level */ |
| level_current += delta; |
| for (i = 2; i < device->brightness->count; i++) { |
| l = device->brightness->levels[i]; |
| if (l < min) |
| min = l; |
| if (l > max) |
| max = l; |
| if (l < min_above && l > level_current) |
| min_above = l; |
| if (l > max_below && l < level_current) |
| max_below = l; |
| } |
| |
| switch (event) { |
| case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: |
| return (level_current < max) ? min_above : min; |
| case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: |
| return (level_current < max) ? min_above : max; |
| case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: |
| return (level_current > min) ? max_below : min; |
| case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: |
| case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: |
| return 0; |
| default: |
| return level_current; |
| } |
| } |
| |
| static int |
| acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
| { |
| unsigned long long level_current, level_next; |
| int result = -EINVAL; |
| |
| if (!device->brightness) |
| goto out; |
| |
| result = acpi_video_device_lcd_get_level_current(device, |
| &level_current); |
| if (result) |
| goto out; |
| |
| level_next = acpi_video_get_next_level(device, level_current, event); |
| |
| result = acpi_video_device_lcd_set_level(device, level_next); |
| |
| out: |
| if (result) |
| printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); |
| |
| return result; |
| } |
| |
| static int |
| acpi_video_bus_get_devices(struct acpi_video_bus *video, |
| struct acpi_device *device) |
| { |
| int status = 0; |
| struct acpi_device *dev; |
| |
| acpi_video_device_enumerate(video); |
| |
| list_for_each_entry(dev, &device->children, node) { |
| |
| status = acpi_video_bus_get_one_device(dev, video); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_WARNING PREFIX |
| "Cant attach device"); |
| continue; |
| } |
| } |
| return status; |
| } |
| |
| static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
| { |
| acpi_status status; |
| struct acpi_video_bus *video; |
| |
| |
| if (!device || !device->video) |
| return -ENOENT; |
| |
| video = device->video; |
| |
| acpi_video_device_remove_fs(device->dev); |
| |
| status = acpi_remove_notify_handler(device->dev->handle, |
| ACPI_DEVICE_NOTIFY, |
| acpi_video_device_notify); |
| sysfs_remove_link(&device->backlight->dev.kobj, "device"); |
| backlight_device_unregister(device->backlight); |
| if (device->cdev) { |
| sysfs_remove_link(&device->dev->dev.kobj, |
| "thermal_cooling"); |
| sysfs_remove_link(&device->cdev->device.kobj, |
| "device"); |
| thermal_cooling_device_unregister(device->cdev); |
| device->cdev = NULL; |
| } |
| video_output_unregister(device->output_dev); |
| |
| return 0; |
| } |
| |
| static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
| { |
| int status; |
| struct acpi_video_device *dev, *next; |
| |
| mutex_lock(&video->device_list_lock); |
| |
| list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
| |
| status = acpi_video_bus_put_one_device(dev); |
| if (ACPI_FAILURE(status)) |
| printk(KERN_WARNING PREFIX |
| "hhuuhhuu bug in acpi video driver.\n"); |
| |
| if (dev->brightness) { |
| kfree(dev->brightness->levels); |
| kfree(dev->brightness); |
| } |
| list_del(&dev->entry); |
| kfree(dev); |
| } |
| |
| mutex_unlock(&video->device_list_lock); |
| |
| return 0; |
| } |
| |
| /* acpi_video interface */ |
| |
| static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
| { |
| return acpi_video_bus_DOS(video, 0, 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(struct acpi_device *device, u32 event) |
| { |
| struct acpi_video_bus *video = acpi_driver_data(device); |
| struct input_dev *input; |
| int keycode; |
| |
| if (!video) |
| return; |
| |
| input = video->input; |
| |
| switch (event) { |
| case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
| * most likely via hotkey. */ |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_SWITCHVIDEOMODE; |
| break; |
| |
| case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
| * connector. */ |
| acpi_video_device_enumerate(video); |
| acpi_video_device_rebind(video); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_SWITCHVIDEOMODE; |
| break; |
| |
| case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_SWITCHVIDEOMODE; |
| break; |
| case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_VIDEO_NEXT; |
| break; |
| case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_VIDEO_PREV; |
| break; |
| |
| default: |
| keycode = KEY_UNKNOWN; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Unsupported event [0x%x]\n", event)); |
| break; |
| } |
| |
| acpi_notifier_call_chain(device, event, 0); |
| input_report_key(input, keycode, 1); |
| input_sync(input); |
| input_report_key(input, keycode, 0); |
| input_sync(input); |
| |
| return; |
| } |
| |
| static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
| { |
| struct acpi_video_device *video_device = data; |
| struct acpi_device *device = NULL; |
| struct acpi_video_bus *bus; |
| struct input_dev *input; |
| int keycode; |
| |
| if (!video_device) |
| return; |
| |
| device = video_device->dev; |
| bus = video_device->video; |
| input = bus->input; |
| |
| switch (event) { |
| case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
| if (brightness_switch_enabled) |
| acpi_video_switch_brightness(video_device, event); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_BRIGHTNESS_CYCLE; |
| break; |
| case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
| if (brightness_switch_enabled) |
| acpi_video_switch_brightness(video_device, event); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_BRIGHTNESSUP; |
| break; |
| case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
| if (brightness_switch_enabled) |
| acpi_video_switch_brightness(video_device, event); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_BRIGHTNESSDOWN; |
| break; |
| case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ |
| if (brightness_switch_enabled) |
| acpi_video_switch_brightness(video_device, event); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_BRIGHTNESS_ZERO; |
| break; |
| case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
| if (brightness_switch_enabled) |
| acpi_video_switch_brightness(video_device, event); |
| acpi_bus_generate_proc_event(device, event, 0); |
| keycode = KEY_DISPLAY_OFF; |
| break; |
| default: |
| keycode = KEY_UNKNOWN; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Unsupported event [0x%x]\n", event)); |
| break; |
| } |
| |
| acpi_notifier_call_chain(device, event, 0); |
| input_report_key(input, keycode, 1); |
| input_sync(input); |
| input_report_key(input, keycode, 0); |
| input_sync(input); |
| |
| return; |
| } |
| |
| static int instance; |
| static int acpi_video_resume(struct acpi_device *device) |
| { |
| struct acpi_video_bus *video; |
| struct acpi_video_device *video_device; |
| int i; |
| |
| if (!device || !acpi_driver_data(device)) |
| return -EINVAL; |
| |
| video = acpi_driver_data(device); |
| |
| for (i = 0; i < video->attached_count; i++) { |
| video_device = video->attached_array[i].bind_info; |
| if (video_device && video_device->backlight) |
| acpi_video_set_brightness(video_device->backlight); |
| } |
| return AE_OK; |
| } |
| |
| static int acpi_video_bus_add(struct acpi_device *device) |
| { |
| struct acpi_video_bus *video; |
| struct input_dev *input; |
| int error; |
| |
| video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
| if (!video) |
| return -ENOMEM; |
| |
| /* a hack to fix the duplicate name "VID" problem on T61 */ |
| if (!strcmp(device->pnp.bus_id, "VID")) { |
| if (instance) |
| device->pnp.bus_id[3] = '0' + instance; |
| instance ++; |
| } |
| /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
| if (!strcmp(device->pnp.bus_id, "VGA")) { |
| if (instance) |
| device->pnp.bus_id[3] = '0' + instance; |
| instance++; |
| } |
| |
| video->device = device; |
| strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
| strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); |
| device->driver_data = video; |
| |
| acpi_video_bus_find_cap(video); |
| error = acpi_video_bus_check(video); |
| if (error) |
| goto err_free_video; |
| |
| error = acpi_video_bus_add_fs(device); |
| if (error) |
| goto err_free_video; |
| |
| mutex_init(&video->device_list_lock); |
| INIT_LIST_HEAD(&video->video_device_list); |
| |
| acpi_video_bus_get_devices(video, device); |
| acpi_video_bus_start_devices(video); |
| |
| video->input = input = input_allocate_device(); |
| if (!input) { |
| error = -ENOMEM; |
| goto err_stop_video; |
| } |
| |
| snprintf(video->phys, sizeof(video->phys), |
| "%s/video/input0", acpi_device_hid(video->device)); |
| |
| input->name = acpi_device_name(video->device); |
| input->phys = video->phys; |
| input->id.bustype = BUS_HOST; |
| input->id.product = 0x06; |
| input->dev.parent = &device->dev; |
| input->evbit[0] = BIT(EV_KEY); |
| set_bit(KEY_SWITCHVIDEOMODE, input->keybit); |
| set_bit(KEY_VIDEO_NEXT, input->keybit); |
| set_bit(KEY_VIDEO_PREV, input->keybit); |
| set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); |
| set_bit(KEY_BRIGHTNESSUP, input->keybit); |
| set_bit(KEY_BRIGHTNESSDOWN, input->keybit); |
| set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); |
| set_bit(KEY_DISPLAY_OFF, input->keybit); |
| set_bit(KEY_UNKNOWN, input->keybit); |
| |
| error = input_register_device(input); |
| if (error) |
| goto err_free_input_dev; |
| |
| 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"); |
| |
| return 0; |
| |
| err_free_input_dev: |
| input_free_device(input); |
| err_stop_video: |
| acpi_video_bus_stop_devices(video); |
| acpi_video_bus_put_devices(video); |
| kfree(video->attached_array); |
| acpi_video_bus_remove_fs(device); |
| err_free_video: |
| kfree(video); |
| device->driver_data = NULL; |
| |
| return error; |
| } |
| |
| static int acpi_video_bus_remove(struct acpi_device *device, int type) |
| { |
| struct acpi_video_bus *video = NULL; |
| |
| |
| if (!device || !acpi_driver_data(device)) |
| return -EINVAL; |
| |
| video = acpi_driver_data(device); |
| |
| acpi_video_bus_stop_devices(video); |
| acpi_video_bus_put_devices(video); |
| acpi_video_bus_remove_fs(device); |
| |
| input_unregister_device(video->input); |
| kfree(video->attached_array); |
| kfree(video); |
| |
| return 0; |
| } |
| |
| static int __init intel_opregion_present(void) |
| { |
| #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE) |
| struct pci_dev *dev = NULL; |
| u32 address; |
| |
| for_each_pci_dev(dev) { |
| if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) |
| continue; |
| if (dev->vendor != PCI_VENDOR_ID_INTEL) |
| continue; |
| pci_read_config_dword(dev, 0xfc, &address); |
| if (!address) |
| continue; |
| return 1; |
| } |
| #endif |
| return 0; |
| } |
| |
| int acpi_video_register(void) |
| { |
| int result = 0; |
| if (register_count) { |
| /* |
| * if the function of acpi_video_register is already called, |
| * don't register the acpi_vide_bus again and return no error. |
| */ |
| return 0; |
| } |
| |
| acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); |
| if (!acpi_video_dir) |
| return -ENODEV; |
| |
| result = acpi_bus_register_driver(&acpi_video_bus); |
| if (result < 0) { |
| remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); |
| return -ENODEV; |
| } |
| |
| /* |
| * When the acpi_video_bus is loaded successfully, increase |
| * the counter reference. |
| */ |
| register_count = 1; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(acpi_video_register); |
| |
| void acpi_video_unregister(void) |
| { |
| if (!register_count) { |
| /* |
| * If the acpi video bus is already unloaded, don't |
| * unload it again and return directly. |
| */ |
| return; |
| } |
| acpi_bus_unregister_driver(&acpi_video_bus); |
| |
| remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); |
| |
| register_count = 0; |
| |
| return; |
| } |
| EXPORT_SYMBOL(acpi_video_unregister); |
| |
| /* |
| * This is kind of nasty. Hardware using Intel chipsets may require |
| * the video opregion code to be run first in order to initialise |
| * state before any ACPI video calls are made. To handle this we defer |
| * registration of the video class until the opregion code has run. |
| */ |
| |
| static int __init acpi_video_init(void) |
| { |
| dmi_check_system(video_dmi_table); |
| |
| if (intel_opregion_present()) |
| return 0; |
| |
| return acpi_video_register(); |
| } |
| |
| static void __exit acpi_video_exit(void) |
| { |
| acpi_video_unregister(); |
| |
| return; |
| } |
| |
| module_init(acpi_video_init); |
| module_exit(acpi_video_exit); |