/* * video.c - ACPI Video Driver ($Revision:$) * * Copyright (C) 2004 Luming Yu * Copyright (C) 2004 Bruno Ducrot * Copyright (C) 2006 Thomas Tuttle * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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 #include #include #include #include #include #include #include #include #include #include #include #define ACPI_VIDEO_COMPONENT 0x08000000 #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 ACPI_VIDEO_HEAD_INVALID (~0u - 1) #define ACPI_VIDEO_HEAD_END (~0u) #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 acpi_video_bus_add(struct acpi_device *device); static int acpi_video_bus_remove(struct acpi_device *device, int type); 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, }, }; 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 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 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 _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_device_brightness { int curr; int count; int *levels; }; 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 output_device *output_dev; }; /* 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_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 *level); 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); static int acpi_video_device_get_state(struct acpi_video_device *device, unsigned 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 cur_level; struct acpi_video_device *vd = (struct acpi_video_device *)bl_get_data(bd); acpi_video_device_lcd_get_level_current(vd, &cur_level); return (int) cur_level; } static int acpi_video_set_brightness(struct backlight_device *bd) { int request_level = bd->props.brightness; struct acpi_video_device *vd = (struct acpi_video_device *)bl_get_data(bd); acpi_video_device_lcd_set_level(vd, request_level); return 0; } 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 state; struct acpi_video_device *vd = (struct acpi_video_device *)class_get_devdata(&od->class_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 *)class_get_devdata(&od->class_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, }; /* -------------------------------------------------------------------------- Video Management -------------------------------------------------------------------------- */ /* device */ static int acpi_video_device_query(struct acpi_video_device *device, unsigned 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 *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 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 }; arg0.integer.value = level; status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL); printk(KERN_DEBUG "set_level status: %x\n", status); return status; } static int acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, unsigned long *level) { int status; status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level); return 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 }; *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 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 *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 *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; } /* * 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; int i; u32 max_level = 0; union acpi_object *obj = NULL; struct acpi_video_device_brightness *br = NULL; memset(&device->cap, 0, 4); 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; 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_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { if (obj->package.count >= 2) { int count = 0; union acpi_object *o; br = kzalloc(sizeof(*br), GFP_KERNEL); if (!br) { printk(KERN_ERR "can't allocate memory\n"); } else { 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) { 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++; } out: if (count < 2) { kfree(br->levels); kfree(br); } else { br->count = count; device->brightness = br; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count)); } } } } else { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n")); } kfree(obj); if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){ unsigned long tmp; static int count = 0; char *name; name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); if (!name) return; sprintf(name, "acpi_video%d", count++); acpi_video_device_lcd_get_level_current(device, &tmp); device->backlight = backlight_device_register(name, NULL, device, &acpi_backlight_ops); device->backlight->props.max_brightness = max_level; device->backlight->props.brightness = (int)tmp; backlight_update_status(device->backlight); kfree(name); } if (device->cap._DCS && device->cap._DSS){ static int count = 0; 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); } return; } /* * 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; memset(&video->cap, 0, 4); 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; if (!video) return -EINVAL; /* 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 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%02lx\n", state); else seq_printf(seq, "\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, "\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, "\n"); return 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 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[4] = { 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 = 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 count; } 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, "\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 = NULL; struct acpi_video_device *vid_dev; if (!device) return -ENODEV; vid_dev = acpi_driver_data(device); if (!vid_dev) return -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 -ENODEV; acpi_device_dir(device)->owner = THIS_MODULE; } /* 'info' [R] */ entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device)); if (!entry) return -ENODEV; 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) return -ENODEV; else { acpi_video_device_state_fops.write = acpi_video_device_write_state; entry->proc_fops = &acpi_video_device_state_fops; 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) return -ENODEV; else { acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness; entry->proc_fops = &acpi_video_device_brightness_fops; 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) return -ENODEV; else { entry->proc_fops = &acpi_video_device_EDID_fops; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } return 0; } static int acpi_video_device_remove_fs(struct acpi_device *device) { struct acpi_video_device *vid_dev; vid_dev = acpi_driver_data(device); if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) return -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 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", __FUNCTION__); seq_printf(seq, "\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 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("%lx\n", options); seq_printf(seq, "can POST: "); if (options & 2) seq_printf(seq, " "); if (options & 4) seq_printf(seq, " "); seq_putc(seq, '\n'); } else seq_printf(seq, "\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 id; if (!video) goto end; status = acpi_video_bus_get_POST(video, &id); if (!ACPI_SUCCESS(status)) { seq_printf(seq, "\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 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 proc_dir_entry *entry = NULL; struct acpi_video_bus *video; video = 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 -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) return -ENODEV; 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) return -ENODEV; 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) return -ENODEV; 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) return -ENODEV; else { acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST; entry->proc_fops = &acpi_video_bus_POST_fops; 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) return -ENODEV; else { acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS; entry->proc_fops = &acpi_video_bus_DOS_fops; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } return 0; } static int acpi_video_bus_remove_fs(struct acpi_device *device) { struct acpi_video_bus *video; video = 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 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) { int count; for(count = 0; count < video->attached_count; count++) if((video->attached_array[count].value.int_val & 0xffff) == device_id) return &(video->attached_array[count].value.attrib); return NULL; } static int acpi_video_bus_get_one_device(struct acpi_device *device, struct acpi_video_bus *video) { unsigned 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); acpi_driver_data(device) = 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)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing notify handler\n")); if(data->brightness) kfree(data->brightness->levels); kfree(data->brightness); kfree(data); return -ENODEV; } down(&video->sem); list_add_tail(&data->entry, &video->video_device_list); up(&video->sem); 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 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; #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; 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_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 = &dod->package.elements[i]; if (obj->type != ACPI_TYPE_INTEGER) { printk(KERN_ERR PREFIX "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; kfree(video->attached_array); video->attached_array = active_device_list; video->attached_count = count; out: kfree(buffer.pointer); return status; } /* * Arg: * video : video bus device * event : notify event * * Return: * < 0 : error * * 1. Find out the current active output device. * 2. Identify the next output device to switch to. * 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; list_for_each_safe(node, next, &video->video_device_list) { 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 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; max = max_below = 0; min = min_above = 255; for (i = 0; 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 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_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_EXCEPTION((AE_INFO, status, "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; down(&video->sem); list_del(&device->entry); up(&video->sem); acpi_video_device_remove_fs(device->dev); status = acpi_remove_notify_handler(device->dev->handle, ACPI_DEVICE_NOTIFY, acpi_video_device_notify); backlight_device_unregister(device->backlight); video_output_unregister(device->output_dev); return 0; } static int acpi_video_bus_put_devices(struct acpi_video_bus *video) { int status; struct list_head *node, *next; 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->levels); kfree(data->brightness); kfree(data); } return 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 = data; struct acpi_device *device = NULL; printk("video bus notify\n"); if (!video) return; device = video->device; switch (event) { case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, * most likely via hotkey. */ acpi_bus_generate_event(device, event, 0); 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_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; } 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; if (!video_device) return; device = video_device->dev; 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; } static int instance; static int acpi_video_bus_add(struct acpi_device *device) { int result = 0; acpi_status status = 0; struct acpi_video_bus *video = NULL; if (!device) return -EINVAL; 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 ++; } video->device = device; 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(device->handle, ACPI_DEVICE_NOTIFY, acpi_video_bus_notify, video); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing notify handler\n")); acpi_video_bus_stop_devices(video); acpi_video_bus_put_devices(video); kfree(video->attached_array); acpi_video_bus_remove_fs(device); 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) kfree(video); return result; } static int acpi_video_bus_remove(struct acpi_device *device, int type) { acpi_status status = 0; 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); status = acpi_remove_notify_handler(video->device->handle, ACPI_DEVICE_NOTIFY, acpi_video_bus_notify); acpi_video_bus_put_devices(video); acpi_video_bus_remove_fs(device); kfree(video->attached_array); kfree(video); return 0; } static int __init acpi_video_init(void) { int result = 0; /* acpi_dbg_level = 0xFFFFFFFF; acpi_dbg_layer = 0x08000000; */ acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); if (!acpi_video_dir) return -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 -ENODEV; } return 0; } static void __exit acpi_video_exit(void) { acpi_bus_unregister_driver(&acpi_video_bus); remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); return; } module_init(acpi_video_init); module_exit(acpi_video_exit);