Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 1 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * drm_sysfs.c - Modifications to drm_sysfs_class.c to support |
| 4 | * extra sysfs attribute from DRM. Normal drm_sysfs_class |
| 5 | * does not allow adding attributes. |
| 6 | * |
| 7 | * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com> |
| 8 | * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> |
| 9 | * Copyright (c) 2003-2004 IBM Corp. |
| 10 | * |
| 11 | * This file is released under the GPLv2 |
| 12 | * |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/device.h> |
| 16 | #include <linux/kdev_t.h> |
| 17 | #include <linux/err.h> |
| 18 | |
| 19 | #include "drm_core.h" |
Dave Airlie | f210973 | 2005-09-05 21:33:44 +1000 | [diff] [blame] | 20 | #include "drmP.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | /* Display the version of drm_core. This doesn't work right in current design */ |
| 23 | static ssize_t version_show(struct class *dev, char *buf) |
| 24 | { |
| 25 | return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, |
| 26 | CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); |
| 27 | } |
| 28 | |
| 29 | static CLASS_ATTR(version, S_IRUGO, version_show, NULL); |
| 30 | |
| 31 | /** |
| 32 | * drm_sysfs_create - create a struct drm_sysfs_class structure |
| 33 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class |
| 34 | * @name: pointer to a string for the name of this class. |
| 35 | * |
| 36 | * This is used to create a struct drm_sysfs_class pointer that can then be used |
| 37 | * in calls to drm_sysfs_device_add(). |
| 38 | * |
| 39 | * Note, the pointer created here is to be destroyed when finished by making a |
| 40 | * call to drm_sysfs_destroy(). |
| 41 | */ |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 42 | struct class *drm_sysfs_create(struct module *owner, char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | { |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 44 | struct class *class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 46 | class = class_create(owner, name); |
| 47 | if (!class) |
| 48 | return class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 50 | class_create_file(class, &class_attr_version); |
| 51 | return class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | /** |
| 55 | * drm_sysfs_destroy - destroys a struct drm_sysfs_class structure |
| 56 | * @cs: pointer to the struct drm_sysfs_class that is to be destroyed |
| 57 | * |
| 58 | * Note, the pointer to be destroyed must have been created with a call to |
| 59 | * drm_sysfs_create(). |
| 60 | */ |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 61 | void drm_sysfs_destroy(struct class *class) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 63 | if ((class == NULL) || (IS_ERR(class))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | return; |
| 65 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 66 | class_remove_file(class, &class_attr_version); |
| 67 | class_destroy(class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
Dave Airlie | 732052e | 2005-11-11 22:07:35 +1100 | [diff] [blame] | 70 | static ssize_t show_dri(struct class_device *class_device, char *buf) |
| 71 | { |
| 72 | drm_device_t * dev = ((drm_head_t *)class_get_devdata(class_device))->dev; |
| 73 | if (dev->driver->dri_library_name) |
| 74 | return dev->driver->dri_library_name(dev, buf); |
| 75 | return snprintf(buf, PAGE_SIZE, "%s\n", dev->driver->pci_driver.name); |
| 76 | } |
| 77 | |
| 78 | static struct class_device_attribute class_device_attrs[] = { |
| 79 | __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), |
| 80 | }; |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | /** |
| 83 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 84 | * @cs: pointer to the struct class that this device should be registered to. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | * @dev: the dev_t for the device to be added. |
| 86 | * @device: a pointer to a struct device that is assiociated with this class device. |
| 87 | * @fmt: string for the class device's name |
| 88 | * |
| 89 | * A struct class_device will be created in sysfs, registered to the specified |
| 90 | * class. A "dev" file will be created, showing the dev_t for the device. The |
| 91 | * pointer to the struct class_device will be returned from the call. Any further |
| 92 | * sysfs files that might be required can be created using this pointer. |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 93 | * Note: the struct class passed to this function must have previously been |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | * created with a call to drm_sysfs_create(). |
| 95 | */ |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 96 | struct class_device *drm_sysfs_device_add(struct class *cs, drm_head_t *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 98 | struct class_device *class_dev; |
| 99 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 101 | class_dev = class_device_create(cs, NULL, |
| 102 | MKDEV(DRM_MAJOR, head->minor), |
| 103 | &(head->dev->pdev)->dev, |
| 104 | "card%d", head->minor); |
| 105 | if (!class_dev) |
| 106 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 108 | class_set_devdata(class_dev, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Dave Airlie | 732052e | 2005-11-11 22:07:35 +1100 | [diff] [blame] | 110 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 111 | class_device_create_file(class_dev, &class_device_attrs[i]); |
| 112 | return class_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | /** |
| 116 | * drm_sysfs_device_remove - removes a class device that was created with drm_sysfs_device_add() |
| 117 | * @dev: the dev_t of the device that was previously registered. |
| 118 | * |
| 119 | * This call unregisters and cleans up a class device that was created with a |
| 120 | * call to drm_sysfs_device_add() |
| 121 | */ |
Dave Airlie | 732052e | 2005-11-11 22:07:35 +1100 | [diff] [blame] | 122 | void drm_sysfs_device_remove(struct class_device *class_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
Dave Airlie | 732052e | 2005-11-11 22:07:35 +1100 | [diff] [blame] | 124 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Dave Airlie | 732052e | 2005-11-11 22:07:35 +1100 | [diff] [blame] | 126 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 127 | class_device_remove_file(class_dev, &class_device_attrs[i]); |
| 128 | class_device_unregister(class_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |