Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013 Google, Inc. |
| 3 | * |
| 4 | * This software is licensed under the terms of the GNU General Public |
| 5 | * License version 2, as published by the Free Software Foundation, and |
| 6 | * may be copied, distributed, and modified under those terms. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <video/adf_client.h> |
| 16 | |
| 17 | #include "adf.h" |
| 18 | #include "adf_fops.h" |
| 19 | #include "adf_sysfs.h" |
| 20 | |
| 21 | static struct class *adf_class; |
| 22 | static int adf_major; |
| 23 | static DEFINE_IDR(adf_minors); |
| 24 | |
| 25 | #define dev_to_adf_interface(p) \ |
| 26 | adf_obj_to_interface(container_of(p, struct adf_obj, dev)) |
| 27 | |
| 28 | static ssize_t dpms_state_show(struct device *dev, |
| 29 | struct device_attribute *attr, char *buf) |
| 30 | { |
| 31 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 32 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
| 33 | adf_interface_dpms_state(intf)); |
| 34 | } |
| 35 | |
| 36 | static ssize_t current_mode_show(struct device *dev, |
| 37 | struct device_attribute *attr, char *buf) |
| 38 | { |
| 39 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 40 | struct drm_mode_modeinfo mode; |
| 41 | |
| 42 | adf_interface_current_mode(intf, &mode); |
| 43 | |
| 44 | if (mode.name[0]) { |
| 45 | return scnprintf(buf, PAGE_SIZE, "%s\n", mode.name); |
| 46 | } else { |
| 47 | bool interlaced = !!(mode.flags & DRM_MODE_FLAG_INTERLACE); |
| 48 | return scnprintf(buf, PAGE_SIZE, "%ux%u%s\n", mode.hdisplay, |
| 49 | mode.vdisplay, interlaced ? "i" : ""); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
| 54 | char *buf) |
| 55 | { |
| 56 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 57 | return scnprintf(buf, PAGE_SIZE, "%s\n", |
| 58 | adf_interface_type_str(intf)); |
| 59 | } |
| 60 | |
| 61 | static ssize_t vsync_timestamp_show(struct device *dev, |
| 62 | struct device_attribute *attr, char *buf) |
| 63 | { |
| 64 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 65 | ktime_t timestamp; |
| 66 | unsigned long flags; |
| 67 | |
| 68 | read_lock_irqsave(&intf->vsync_lock, flags); |
| 69 | memcpy(×tamp, &intf->vsync_timestamp, sizeof(timestamp)); |
| 70 | read_unlock_irqrestore(&intf->vsync_lock, flags); |
| 71 | |
| 72 | return scnprintf(buf, PAGE_SIZE, "%llu\n", ktime_to_ns(timestamp)); |
| 73 | } |
| 74 | |
| 75 | static ssize_t hotplug_detect_show(struct device *dev, |
| 76 | struct device_attribute *attr, char *buf) |
| 77 | { |
| 78 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 79 | return scnprintf(buf, PAGE_SIZE, "%u\n", intf->hotplug_detect); |
| 80 | } |
| 81 | |
| 82 | static struct device_attribute adf_interface_attrs[] = { |
| 83 | __ATTR_RO(dpms_state), |
| 84 | __ATTR_RO(current_mode), |
| 85 | __ATTR_RO(hotplug_detect), |
| 86 | __ATTR_RO(type), |
| 87 | __ATTR_RO(vsync_timestamp), |
| 88 | }; |
| 89 | |
| 90 | static char *adf_devnode(struct device *dev, umode_t *mode) |
| 91 | { |
| 92 | return kasprintf(GFP_KERNEL, "adf/%s", dev_name(dev)); |
| 93 | } |
| 94 | |
| 95 | int adf_obj_sysfs_init(struct adf_obj *obj, struct device *parent) |
| 96 | { |
| 97 | int ret = idr_alloc(&adf_minors, obj, 0, 0, GFP_KERNEL); |
| 98 | if (ret < 0) { |
| 99 | pr_err("%s: allocating adf minor failed: %d\n", __func__, |
| 100 | ret); |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | obj->minor = ret; |
| 105 | obj->dev.parent = parent; |
| 106 | obj->dev.class = adf_class; |
| 107 | obj->dev.devt = MKDEV(adf_major, obj->minor); |
| 108 | |
| 109 | ret = device_register(&obj->dev); |
| 110 | if (ret < 0) { |
| 111 | pr_err("%s: registering adf object failed: %d\n", __func__, |
| 112 | ret); |
| 113 | goto err_device_register; |
| 114 | } |
| 115 | |
| 116 | return 0; |
| 117 | |
| 118 | err_device_register: |
| 119 | idr_remove(&adf_minors, obj->minor); |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | static char *adf_device_devnode(struct device *dev, umode_t *mode, |
| 124 | kuid_t *uid, kgid_t *gid) |
| 125 | { |
| 126 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 127 | return kasprintf(GFP_KERNEL, "adf/%s/device", obj->name); |
| 128 | } |
| 129 | |
| 130 | static char *adf_interface_devnode(struct device *dev, umode_t *mode, |
| 131 | kuid_t *uid, kgid_t *gid) |
| 132 | { |
| 133 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 134 | struct adf_interface *intf = adf_obj_to_interface(obj); |
| 135 | struct adf_device *parent = adf_interface_parent(intf); |
| 136 | return kasprintf(GFP_KERNEL, "adf/%s/interface%d", |
| 137 | parent->base.name, intf->base.id); |
| 138 | } |
| 139 | |
| 140 | static char *adf_overlay_engine_devnode(struct device *dev, umode_t *mode, |
| 141 | kuid_t *uid, kgid_t *gid) |
| 142 | { |
| 143 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 144 | struct adf_overlay_engine *eng = adf_obj_to_overlay_engine(obj); |
| 145 | struct adf_device *parent = adf_overlay_engine_parent(eng); |
| 146 | return kasprintf(GFP_KERNEL, "adf/%s/overlay-engine%d", |
| 147 | parent->base.name, eng->base.id); |
| 148 | } |
| 149 | |
| 150 | static void adf_noop_release(struct device *dev) |
| 151 | { |
| 152 | } |
| 153 | |
| 154 | static struct device_type adf_device_type = { |
| 155 | .name = "adf_device", |
| 156 | .devnode = adf_device_devnode, |
| 157 | .release = adf_noop_release, |
| 158 | }; |
| 159 | |
| 160 | static struct device_type adf_interface_type = { |
| 161 | .name = "adf_interface", |
| 162 | .devnode = adf_interface_devnode, |
| 163 | .release = adf_noop_release, |
| 164 | }; |
| 165 | |
| 166 | static struct device_type adf_overlay_engine_type = { |
| 167 | .name = "adf_overlay_engine", |
| 168 | .devnode = adf_overlay_engine_devnode, |
| 169 | .release = adf_noop_release, |
| 170 | }; |
| 171 | |
| 172 | int adf_device_sysfs_init(struct adf_device *dev) |
| 173 | { |
| 174 | dev->base.dev.type = &adf_device_type; |
| 175 | dev_set_name(&dev->base.dev, "%s", dev->base.name); |
| 176 | return adf_obj_sysfs_init(&dev->base, dev->dev); |
| 177 | } |
| 178 | |
| 179 | int adf_interface_sysfs_init(struct adf_interface *intf) |
| 180 | { |
| 181 | struct adf_device *parent = adf_interface_parent(intf); |
| 182 | size_t i, j; |
| 183 | int ret; |
| 184 | |
| 185 | intf->base.dev.type = &adf_interface_type; |
| 186 | dev_set_name(&intf->base.dev, "%s-interface%d", parent->base.name, |
| 187 | intf->base.id); |
| 188 | |
| 189 | ret = adf_obj_sysfs_init(&intf->base, &parent->base.dev); |
| 190 | if (ret < 0) |
| 191 | return ret; |
| 192 | |
| 193 | for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++) { |
| 194 | ret = device_create_file(&intf->base.dev, |
| 195 | &adf_interface_attrs[i]); |
| 196 | if (ret < 0) { |
| 197 | dev_err(&intf->base.dev, "creating sysfs attribute %s failed: %d\n", |
| 198 | adf_interface_attrs[i].attr.name, ret); |
| 199 | goto err; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | return 0; |
| 204 | |
| 205 | err: |
| 206 | for (j = 0; j < i; j++) |
| 207 | device_remove_file(&intf->base.dev, &adf_interface_attrs[j]); |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | int adf_overlay_engine_sysfs_init(struct adf_overlay_engine *eng) |
| 212 | { |
| 213 | struct adf_device *parent = adf_overlay_engine_parent(eng); |
| 214 | |
| 215 | eng->base.dev.type = &adf_overlay_engine_type; |
| 216 | dev_set_name(&eng->base.dev, "%s-overlay-engine%d", parent->base.name, |
| 217 | eng->base.id); |
| 218 | |
| 219 | return adf_obj_sysfs_init(&eng->base, &parent->base.dev); |
| 220 | } |
| 221 | |
| 222 | struct adf_obj *adf_obj_sysfs_find(int minor) |
| 223 | { |
| 224 | return idr_find(&adf_minors, minor); |
| 225 | } |
| 226 | |
| 227 | void adf_obj_sysfs_destroy(struct adf_obj *obj) |
| 228 | { |
| 229 | idr_remove(&adf_minors, obj->minor); |
| 230 | device_unregister(&obj->dev); |
| 231 | } |
| 232 | |
| 233 | void adf_device_sysfs_destroy(struct adf_device *dev) |
| 234 | { |
| 235 | adf_obj_sysfs_destroy(&dev->base); |
| 236 | } |
| 237 | |
| 238 | void adf_interface_sysfs_destroy(struct adf_interface *intf) |
| 239 | { |
| 240 | size_t i; |
| 241 | |
| 242 | for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++) |
| 243 | device_remove_file(&intf->base.dev, &adf_interface_attrs[i]); |
| 244 | adf_obj_sysfs_destroy(&intf->base); |
| 245 | } |
| 246 | |
| 247 | void adf_overlay_engine_sysfs_destroy(struct adf_overlay_engine *eng) |
| 248 | { |
| 249 | adf_obj_sysfs_destroy(&eng->base); |
| 250 | } |
| 251 | |
| 252 | int adf_sysfs_init(void) |
| 253 | { |
| 254 | struct class *class; |
| 255 | int ret; |
| 256 | |
| 257 | class = class_create(THIS_MODULE, "adf"); |
| 258 | if (IS_ERR(class)) { |
| 259 | ret = PTR_ERR(class); |
| 260 | pr_err("%s: creating class failed: %d\n", __func__, ret); |
| 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | ret = register_chrdev(0, "adf", &adf_fops); |
| 265 | if (ret < 0) { |
| 266 | pr_err("%s: registering device failed: %d\n", __func__, ret); |
| 267 | goto err_chrdev; |
| 268 | } |
| 269 | |
| 270 | class->devnode = adf_devnode; |
| 271 | adf_class = class; |
| 272 | adf_major = ret; |
| 273 | return 0; |
| 274 | |
| 275 | err_chrdev: |
| 276 | class_destroy(adf_class); |
| 277 | return ret; |
| 278 | } |
| 279 | |
| 280 | void adf_sysfs_destroy(void) |
| 281 | { |
| 282 | idr_destroy(&adf_minors); |
| 283 | class_destroy(adf_class); |
| 284 | } |