Lines Matching defs:gdev
38 struct gnss_device *gdev;
41 gdev = container_of(inode->i_cdev, struct gnss_device, cdev);
43 get_device(&gdev->dev);
46 file->private_data = gdev;
48 down_write(&gdev->rwsem);
49 if (gdev->disconnected) {
54 if (gdev->count++ == 0) {
55 ret = gdev->ops->open(gdev);
57 gdev->count--;
60 up_write(&gdev->rwsem);
63 put_device(&gdev->dev);
70 struct gnss_device *gdev = file->private_data;
72 down_write(&gdev->rwsem);
73 if (gdev->disconnected)
76 if (--gdev->count == 0) {
77 gdev->ops->close(gdev);
78 kfifo_reset(&gdev->read_fifo);
81 up_write(&gdev->rwsem);
83 put_device(&gdev->dev);
91 struct gnss_device *gdev = file->private_data;
95 mutex_lock(&gdev->read_mutex);
96 while (kfifo_is_empty(&gdev->read_fifo)) {
97 mutex_unlock(&gdev->read_mutex);
99 if (gdev->disconnected)
105 ret = wait_event_interruptible(gdev->read_queue,
106 gdev->disconnected ||
107 !kfifo_is_empty(&gdev->read_fifo));
111 mutex_lock(&gdev->read_mutex);
114 ret = kfifo_to_user(&gdev->read_fifo, buf, count, &copied);
118 mutex_unlock(&gdev->read_mutex);
126 struct gnss_device *gdev = file->private_data;
130 if (gdev->disconnected)
136 if (!(gdev->flags & GNSS_FLAG_HAS_WRITE_RAW))
141 ret = mutex_lock_interruptible(&gdev->write_mutex);
151 if (copy_from_user(gdev->write_buf, buf, n)) {
162 down_read(&gdev->rwsem);
163 if (!gdev->disconnected)
164 ret = gdev->ops->write_raw(gdev, gdev->write_buf, n);
167 up_read(&gdev->rwsem);
182 mutex_unlock(&gdev->write_mutex);
189 struct gnss_device *gdev = file->private_data;
192 poll_wait(file, &gdev->read_queue, wait);
194 if (!kfifo_is_empty(&gdev->read_fifo))
196 if (gdev->disconnected)
216 struct gnss_device *gdev = to_gnss_device(dev);
218 kfree(gdev->write_buf);
219 kfifo_free(&gdev->read_fifo);
220 ida_simple_remove(&gnss_minors, gdev->id);
221 kfree(gdev);
226 struct gnss_device *gdev;
231 gdev = kzalloc(sizeof(*gdev), GFP_KERNEL);
232 if (!gdev)
237 kfree(gdev);
241 gdev->id = id;
243 dev = &gdev->dev;
249 dev_set_drvdata(dev, gdev);
252 init_rwsem(&gdev->rwsem);
253 mutex_init(&gdev->read_mutex);
254 mutex_init(&gdev->write_mutex);
255 init_waitqueue_head(&gdev->read_queue);
257 ret = kfifo_alloc(&gdev->read_fifo, GNSS_READ_FIFO_SIZE, GFP_KERNEL);
261 gdev->write_buf = kzalloc(GNSS_WRITE_BUF_SIZE, GFP_KERNEL);
262 if (!gdev->write_buf)
265 cdev_init(&gdev->cdev, &gnss_fops);
266 gdev->cdev.owner = THIS_MODULE;
268 return gdev;
277 void gnss_put_device(struct gnss_device *gdev)
279 put_device(&gdev->dev);
283 int gnss_register_device(struct gnss_device *gdev)
288 if (gdev->ops->write_raw != NULL)
289 gdev->flags |= GNSS_FLAG_HAS_WRITE_RAW;
291 ret = cdev_device_add(&gdev->cdev, &gdev->dev);
293 dev_err(&gdev->dev, "failed to add device: %d\n", ret);
301 void gnss_deregister_device(struct gnss_device *gdev)
303 down_write(&gdev->rwsem);
304 gdev->disconnected = true;
305 if (gdev->count) {
306 wake_up_interruptible(&gdev->read_queue);
307 gdev->ops->close(gdev);
309 up_write(&gdev->rwsem);
311 cdev_device_del(&gdev->cdev, &gdev->dev);
320 int gnss_insert_raw(struct gnss_device *gdev, const unsigned char *buf,
325 ret = kfifo_in(&gdev->read_fifo, buf, count);
327 wake_up_interruptible(&gdev->read_queue);
340 static const char *gnss_type_name(struct gnss_device *gdev)
344 if (gdev->type < GNSS_TYPE_COUNT)
345 name = gnss_type_names[gdev->type];
348 dev_WARN(&gdev->dev, "type name not defined\n");
356 struct gnss_device *gdev = to_gnss_device(dev);
358 return sprintf(buf, "%s\n", gnss_type_name(gdev));
370 struct gnss_device *gdev = to_gnss_device(dev);
373 ret = add_uevent_var(env, "GNSS_TYPE=%s", gnss_type_name(gdev));