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 | |
Greg Hackmann | cf82ca4 | 2013-08-15 12:51:22 -0700 | [diff] [blame^] | 36 | static ssize_t dpms_state_store(struct device *dev, |
| 37 | struct device_attribute *attr, const char *buf, size_t count) |
| 38 | { |
| 39 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 40 | u8 dpms_state; |
| 41 | int err; |
| 42 | |
| 43 | err = kstrtou8(buf, 0, &dpms_state); |
| 44 | if (err < 0) |
| 45 | return err; |
| 46 | |
| 47 | err = adf_interface_blank(intf, dpms_state); |
| 48 | if (err < 0) |
| 49 | return err; |
| 50 | |
| 51 | return count; |
| 52 | } |
| 53 | |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 54 | static ssize_t current_mode_show(struct device *dev, |
| 55 | struct device_attribute *attr, char *buf) |
| 56 | { |
| 57 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 58 | struct drm_mode_modeinfo mode; |
| 59 | |
| 60 | adf_interface_current_mode(intf, &mode); |
| 61 | |
| 62 | if (mode.name[0]) { |
| 63 | return scnprintf(buf, PAGE_SIZE, "%s\n", mode.name); |
| 64 | } else { |
| 65 | bool interlaced = !!(mode.flags & DRM_MODE_FLAG_INTERLACE); |
| 66 | return scnprintf(buf, PAGE_SIZE, "%ux%u%s\n", mode.hdisplay, |
| 67 | mode.vdisplay, interlaced ? "i" : ""); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
| 72 | char *buf) |
| 73 | { |
| 74 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 75 | return scnprintf(buf, PAGE_SIZE, "%s\n", |
| 76 | adf_interface_type_str(intf)); |
| 77 | } |
| 78 | |
| 79 | static ssize_t vsync_timestamp_show(struct device *dev, |
| 80 | struct device_attribute *attr, char *buf) |
| 81 | { |
| 82 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 83 | ktime_t timestamp; |
| 84 | unsigned long flags; |
| 85 | |
| 86 | read_lock_irqsave(&intf->vsync_lock, flags); |
| 87 | memcpy(×tamp, &intf->vsync_timestamp, sizeof(timestamp)); |
| 88 | read_unlock_irqrestore(&intf->vsync_lock, flags); |
| 89 | |
| 90 | return scnprintf(buf, PAGE_SIZE, "%llu\n", ktime_to_ns(timestamp)); |
| 91 | } |
| 92 | |
| 93 | static ssize_t hotplug_detect_show(struct device *dev, |
| 94 | struct device_attribute *attr, char *buf) |
| 95 | { |
| 96 | struct adf_interface *intf = dev_to_adf_interface(dev); |
| 97 | return scnprintf(buf, PAGE_SIZE, "%u\n", intf->hotplug_detect); |
| 98 | } |
| 99 | |
| 100 | static struct device_attribute adf_interface_attrs[] = { |
Greg Hackmann | cf82ca4 | 2013-08-15 12:51:22 -0700 | [diff] [blame^] | 101 | __ATTR(dpms_state, S_IRUGO|S_IWUSR, dpms_state_show, dpms_state_store), |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 102 | __ATTR_RO(current_mode), |
| 103 | __ATTR_RO(hotplug_detect), |
| 104 | __ATTR_RO(type), |
| 105 | __ATTR_RO(vsync_timestamp), |
| 106 | }; |
| 107 | |
| 108 | static char *adf_devnode(struct device *dev, umode_t *mode) |
| 109 | { |
| 110 | return kasprintf(GFP_KERNEL, "adf/%s", dev_name(dev)); |
| 111 | } |
| 112 | |
| 113 | int adf_obj_sysfs_init(struct adf_obj *obj, struct device *parent) |
| 114 | { |
| 115 | int ret = idr_alloc(&adf_minors, obj, 0, 0, GFP_KERNEL); |
| 116 | if (ret < 0) { |
| 117 | pr_err("%s: allocating adf minor failed: %d\n", __func__, |
| 118 | ret); |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | obj->minor = ret; |
| 123 | obj->dev.parent = parent; |
| 124 | obj->dev.class = adf_class; |
| 125 | obj->dev.devt = MKDEV(adf_major, obj->minor); |
| 126 | |
| 127 | ret = device_register(&obj->dev); |
| 128 | if (ret < 0) { |
| 129 | pr_err("%s: registering adf object failed: %d\n", __func__, |
| 130 | ret); |
| 131 | goto err_device_register; |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | |
| 136 | err_device_register: |
| 137 | idr_remove(&adf_minors, obj->minor); |
| 138 | return ret; |
| 139 | } |
| 140 | |
| 141 | static char *adf_device_devnode(struct device *dev, umode_t *mode, |
| 142 | kuid_t *uid, kgid_t *gid) |
| 143 | { |
| 144 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 145 | return kasprintf(GFP_KERNEL, "adf/%s/device", obj->name); |
| 146 | } |
| 147 | |
| 148 | static char *adf_interface_devnode(struct device *dev, umode_t *mode, |
| 149 | kuid_t *uid, kgid_t *gid) |
| 150 | { |
| 151 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 152 | struct adf_interface *intf = adf_obj_to_interface(obj); |
| 153 | struct adf_device *parent = adf_interface_parent(intf); |
| 154 | return kasprintf(GFP_KERNEL, "adf/%s/interface%d", |
| 155 | parent->base.name, intf->base.id); |
| 156 | } |
| 157 | |
| 158 | static char *adf_overlay_engine_devnode(struct device *dev, umode_t *mode, |
| 159 | kuid_t *uid, kgid_t *gid) |
| 160 | { |
| 161 | struct adf_obj *obj = container_of(dev, struct adf_obj, dev); |
| 162 | struct adf_overlay_engine *eng = adf_obj_to_overlay_engine(obj); |
| 163 | struct adf_device *parent = adf_overlay_engine_parent(eng); |
| 164 | return kasprintf(GFP_KERNEL, "adf/%s/overlay-engine%d", |
| 165 | parent->base.name, eng->base.id); |
| 166 | } |
| 167 | |
| 168 | static void adf_noop_release(struct device *dev) |
| 169 | { |
| 170 | } |
| 171 | |
| 172 | static struct device_type adf_device_type = { |
| 173 | .name = "adf_device", |
| 174 | .devnode = adf_device_devnode, |
| 175 | .release = adf_noop_release, |
| 176 | }; |
| 177 | |
| 178 | static struct device_type adf_interface_type = { |
| 179 | .name = "adf_interface", |
| 180 | .devnode = adf_interface_devnode, |
| 181 | .release = adf_noop_release, |
| 182 | }; |
| 183 | |
| 184 | static struct device_type adf_overlay_engine_type = { |
| 185 | .name = "adf_overlay_engine", |
| 186 | .devnode = adf_overlay_engine_devnode, |
| 187 | .release = adf_noop_release, |
| 188 | }; |
| 189 | |
| 190 | int adf_device_sysfs_init(struct adf_device *dev) |
| 191 | { |
| 192 | dev->base.dev.type = &adf_device_type; |
| 193 | dev_set_name(&dev->base.dev, "%s", dev->base.name); |
| 194 | return adf_obj_sysfs_init(&dev->base, dev->dev); |
| 195 | } |
| 196 | |
| 197 | int adf_interface_sysfs_init(struct adf_interface *intf) |
| 198 | { |
| 199 | struct adf_device *parent = adf_interface_parent(intf); |
| 200 | size_t i, j; |
| 201 | int ret; |
| 202 | |
| 203 | intf->base.dev.type = &adf_interface_type; |
| 204 | dev_set_name(&intf->base.dev, "%s-interface%d", parent->base.name, |
| 205 | intf->base.id); |
| 206 | |
| 207 | ret = adf_obj_sysfs_init(&intf->base, &parent->base.dev); |
| 208 | if (ret < 0) |
| 209 | return ret; |
| 210 | |
| 211 | for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++) { |
| 212 | ret = device_create_file(&intf->base.dev, |
| 213 | &adf_interface_attrs[i]); |
| 214 | if (ret < 0) { |
| 215 | dev_err(&intf->base.dev, "creating sysfs attribute %s failed: %d\n", |
| 216 | adf_interface_attrs[i].attr.name, ret); |
| 217 | goto err; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | return 0; |
| 222 | |
| 223 | err: |
| 224 | for (j = 0; j < i; j++) |
| 225 | device_remove_file(&intf->base.dev, &adf_interface_attrs[j]); |
| 226 | return ret; |
| 227 | } |
| 228 | |
| 229 | int adf_overlay_engine_sysfs_init(struct adf_overlay_engine *eng) |
| 230 | { |
| 231 | struct adf_device *parent = adf_overlay_engine_parent(eng); |
| 232 | |
| 233 | eng->base.dev.type = &adf_overlay_engine_type; |
| 234 | dev_set_name(&eng->base.dev, "%s-overlay-engine%d", parent->base.name, |
| 235 | eng->base.id); |
| 236 | |
| 237 | return adf_obj_sysfs_init(&eng->base, &parent->base.dev); |
| 238 | } |
| 239 | |
| 240 | struct adf_obj *adf_obj_sysfs_find(int minor) |
| 241 | { |
| 242 | return idr_find(&adf_minors, minor); |
| 243 | } |
| 244 | |
| 245 | void adf_obj_sysfs_destroy(struct adf_obj *obj) |
| 246 | { |
| 247 | idr_remove(&adf_minors, obj->minor); |
| 248 | device_unregister(&obj->dev); |
| 249 | } |
| 250 | |
| 251 | void adf_device_sysfs_destroy(struct adf_device *dev) |
| 252 | { |
| 253 | adf_obj_sysfs_destroy(&dev->base); |
| 254 | } |
| 255 | |
| 256 | void adf_interface_sysfs_destroy(struct adf_interface *intf) |
| 257 | { |
| 258 | size_t i; |
| 259 | |
| 260 | for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++) |
| 261 | device_remove_file(&intf->base.dev, &adf_interface_attrs[i]); |
| 262 | adf_obj_sysfs_destroy(&intf->base); |
| 263 | } |
| 264 | |
| 265 | void adf_overlay_engine_sysfs_destroy(struct adf_overlay_engine *eng) |
| 266 | { |
| 267 | adf_obj_sysfs_destroy(&eng->base); |
| 268 | } |
| 269 | |
| 270 | int adf_sysfs_init(void) |
| 271 | { |
| 272 | struct class *class; |
| 273 | int ret; |
| 274 | |
| 275 | class = class_create(THIS_MODULE, "adf"); |
| 276 | if (IS_ERR(class)) { |
| 277 | ret = PTR_ERR(class); |
| 278 | pr_err("%s: creating class failed: %d\n", __func__, ret); |
| 279 | return ret; |
| 280 | } |
| 281 | |
| 282 | ret = register_chrdev(0, "adf", &adf_fops); |
| 283 | if (ret < 0) { |
| 284 | pr_err("%s: registering device failed: %d\n", __func__, ret); |
| 285 | goto err_chrdev; |
| 286 | } |
| 287 | |
| 288 | class->devnode = adf_devnode; |
| 289 | adf_class = class; |
| 290 | adf_major = ret; |
| 291 | return 0; |
| 292 | |
| 293 | err_chrdev: |
| 294 | class_destroy(adf_class); |
| 295 | return ret; |
| 296 | } |
| 297 | |
| 298 | void adf_sysfs_destroy(void) |
| 299 | { |
| 300 | idr_destroy(&adf_minors); |
| 301 | class_destroy(adf_class); |
| 302 | } |