18d395ce6SCai Huoqing // SPDX-License-Identifier: LGPL-2.1-or-later
23d6c2bc0SMauro Carvalho Chehab /*
33d6c2bc0SMauro Carvalho Chehab * dvbdev.c
43d6c2bc0SMauro Carvalho Chehab *
53d6c2bc0SMauro Carvalho Chehab * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
63d6c2bc0SMauro Carvalho Chehab * & Marcus Metzler <marcus@convergence.de>
73d6c2bc0SMauro Carvalho Chehab * for convergence integrated media GmbH
83d6c2bc0SMauro Carvalho Chehab */
93d6c2bc0SMauro Carvalho Chehab
10b3ad24d2SMauro Carvalho Chehab #define pr_fmt(fmt) "dvbdev: " fmt
11b3ad24d2SMauro Carvalho Chehab
123d6c2bc0SMauro Carvalho Chehab #include <linux/types.h>
133d6c2bc0SMauro Carvalho Chehab #include <linux/errno.h>
143d6c2bc0SMauro Carvalho Chehab #include <linux/string.h>
153d6c2bc0SMauro Carvalho Chehab #include <linux/module.h>
163d6c2bc0SMauro Carvalho Chehab #include <linux/kernel.h>
178f569c0bSMauro Carvalho Chehab #include <linux/i2c.h>
183d6c2bc0SMauro Carvalho Chehab #include <linux/init.h>
193d6c2bc0SMauro Carvalho Chehab #include <linux/slab.h>
203d6c2bc0SMauro Carvalho Chehab #include <linux/device.h>
213d6c2bc0SMauro Carvalho Chehab #include <linux/fs.h>
223d6c2bc0SMauro Carvalho Chehab #include <linux/cdev.h>
233d6c2bc0SMauro Carvalho Chehab #include <linux/mutex.h>
24fada1935SMauro Carvalho Chehab #include <media/dvbdev.h>
253d6c2bc0SMauro Carvalho Chehab
26188d2d55SMauro Carvalho Chehab /* Due to enum tuner_pad_index */
27188d2d55SMauro Carvalho Chehab #include <media/tuner.h>
28188d2d55SMauro Carvalho Chehab
293d6c2bc0SMauro Carvalho Chehab static DEFINE_MUTEX(dvbdev_mutex);
30627bb528SHyunwoo Kim static LIST_HEAD(dvbdevfops_list);
313d6c2bc0SMauro Carvalho Chehab static int dvbdev_debug;
323d6c2bc0SMauro Carvalho Chehab
333d6c2bc0SMauro Carvalho Chehab module_param(dvbdev_debug, int, 0644);
343d6c2bc0SMauro Carvalho Chehab MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off).");
353d6c2bc0SMauro Carvalho Chehab
36b3ad24d2SMauro Carvalho Chehab #define dprintk(fmt, arg...) do { \
37b3ad24d2SMauro Carvalho Chehab if (dvbdev_debug) \
38b3ad24d2SMauro Carvalho Chehab printk(KERN_DEBUG pr_fmt("%s: " fmt), \
39b3ad24d2SMauro Carvalho Chehab __func__, ##arg); \
40b3ad24d2SMauro Carvalho Chehab } while (0)
413d6c2bc0SMauro Carvalho Chehab
423d6c2bc0SMauro Carvalho Chehab static LIST_HEAD(dvb_adapter_list);
433d6c2bc0SMauro Carvalho Chehab static DEFINE_MUTEX(dvbdev_register_lock);
443d6c2bc0SMauro Carvalho Chehab
453d6c2bc0SMauro Carvalho Chehab static const char * const dnames[] = {
466bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_VIDEO] = "video",
476bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_AUDIO] = "audio",
486bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_SEC] = "sec",
496bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_FRONTEND] = "frontend",
506bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_DEMUX] = "demux",
516bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_DVR] = "dvr",
526bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_CA] = "ca",
536bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_NET] = "net",
546bbf7a85SMauro Carvalho Chehab [DVB_DEVICE_OSD] = "osd"
553d6c2bc0SMauro Carvalho Chehab };
563d6c2bc0SMauro Carvalho Chehab
573d6c2bc0SMauro Carvalho Chehab #ifdef CONFIG_DVB_DYNAMIC_MINORS
583d6c2bc0SMauro Carvalho Chehab #define MAX_DVB_MINORS 256
593d6c2bc0SMauro Carvalho Chehab #define DVB_MAX_IDS MAX_DVB_MINORS
603d6c2bc0SMauro Carvalho Chehab #else
613d6c2bc0SMauro Carvalho Chehab #define DVB_MAX_IDS 4
626bbf7a85SMauro Carvalho Chehab
638382e556SMauro Carvalho Chehab static const u8 minor_type[] = {
648382e556SMauro Carvalho Chehab [DVB_DEVICE_VIDEO] = 0,
658382e556SMauro Carvalho Chehab [DVB_DEVICE_AUDIO] = 1,
668382e556SMauro Carvalho Chehab [DVB_DEVICE_SEC] = 2,
678382e556SMauro Carvalho Chehab [DVB_DEVICE_FRONTEND] = 3,
688382e556SMauro Carvalho Chehab [DVB_DEVICE_DEMUX] = 4,
698382e556SMauro Carvalho Chehab [DVB_DEVICE_DVR] = 5,
708382e556SMauro Carvalho Chehab [DVB_DEVICE_CA] = 6,
718382e556SMauro Carvalho Chehab [DVB_DEVICE_NET] = 7,
728382e556SMauro Carvalho Chehab [DVB_DEVICE_OSD] = 8,
738382e556SMauro Carvalho Chehab };
746bbf7a85SMauro Carvalho Chehab
758382e556SMauro Carvalho Chehab #define nums2minor(num, type, id) \
768382e556SMauro Carvalho Chehab (((num) << 6) | ((id) << 4) | minor_type[type])
776bbf7a85SMauro Carvalho Chehab
783d6c2bc0SMauro Carvalho Chehab #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS * 64)
793d6c2bc0SMauro Carvalho Chehab #endif
803d6c2bc0SMauro Carvalho Chehab
813d6c2bc0SMauro Carvalho Chehab static struct class *dvb_class;
823d6c2bc0SMauro Carvalho Chehab
833d6c2bc0SMauro Carvalho Chehab static struct dvb_device *dvb_minors[MAX_DVB_MINORS];
843d6c2bc0SMauro Carvalho Chehab static DECLARE_RWSEM(minor_rwsem);
853d6c2bc0SMauro Carvalho Chehab
dvb_device_open(struct inode * inode,struct file * file)863d6c2bc0SMauro Carvalho Chehab static int dvb_device_open(struct inode *inode, struct file *file)
873d6c2bc0SMauro Carvalho Chehab {
883d6c2bc0SMauro Carvalho Chehab struct dvb_device *dvbdev;
893d6c2bc0SMauro Carvalho Chehab
903d6c2bc0SMauro Carvalho Chehab mutex_lock(&dvbdev_mutex);
913d6c2bc0SMauro Carvalho Chehab down_read(&minor_rwsem);
923d6c2bc0SMauro Carvalho Chehab dvbdev = dvb_minors[iminor(inode)];
933d6c2bc0SMauro Carvalho Chehab
943d6c2bc0SMauro Carvalho Chehab if (dvbdev && dvbdev->fops) {
953d6c2bc0SMauro Carvalho Chehab int err = 0;
96e84f9e57SAl Viro const struct file_operations *new_fops;
973d6c2bc0SMauro Carvalho Chehab
98e84f9e57SAl Viro new_fops = fops_get(dvbdev->fops);
99e84f9e57SAl Viro if (!new_fops)
1003d6c2bc0SMauro Carvalho Chehab goto fail;
1010fc044b2SLin Ma file->private_data = dvb_device_get(dvbdev);
102e84f9e57SAl Viro replace_fops(file, new_fops);
1033d6c2bc0SMauro Carvalho Chehab if (file->f_op->open)
1043d6c2bc0SMauro Carvalho Chehab err = file->f_op->open(inode, file);
1053d6c2bc0SMauro Carvalho Chehab up_read(&minor_rwsem);
1063d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_mutex);
107a2dd235dSDan Carpenter if (err)
108a2dd235dSDan Carpenter dvb_device_put(dvbdev);
1093d6c2bc0SMauro Carvalho Chehab return err;
1103d6c2bc0SMauro Carvalho Chehab }
1113d6c2bc0SMauro Carvalho Chehab fail:
1123d6c2bc0SMauro Carvalho Chehab up_read(&minor_rwsem);
1133d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_mutex);
1143d6c2bc0SMauro Carvalho Chehab return -ENODEV;
1153d6c2bc0SMauro Carvalho Chehab }
1163d6c2bc0SMauro Carvalho Chehab
117f28701ccSMauro Carvalho Chehab static const struct file_operations dvb_device_fops = {
1183d6c2bc0SMauro Carvalho Chehab .owner = THIS_MODULE,
1193d6c2bc0SMauro Carvalho Chehab .open = dvb_device_open,
1203d6c2bc0SMauro Carvalho Chehab .llseek = noop_llseek,
1213d6c2bc0SMauro Carvalho Chehab };
1223d6c2bc0SMauro Carvalho Chehab
1233d6c2bc0SMauro Carvalho Chehab static struct cdev dvb_device_cdev;
1243d6c2bc0SMauro Carvalho Chehab
dvb_generic_open(struct inode * inode,struct file * file)1253d6c2bc0SMauro Carvalho Chehab int dvb_generic_open(struct inode *inode, struct file *file)
1263d6c2bc0SMauro Carvalho Chehab {
1273d6c2bc0SMauro Carvalho Chehab struct dvb_device *dvbdev = file->private_data;
1283d6c2bc0SMauro Carvalho Chehab
1293d6c2bc0SMauro Carvalho Chehab if (!dvbdev)
1303d6c2bc0SMauro Carvalho Chehab return -ENODEV;
1313d6c2bc0SMauro Carvalho Chehab
1323d6c2bc0SMauro Carvalho Chehab if (!dvbdev->users)
1333d6c2bc0SMauro Carvalho Chehab return -EBUSY;
1343d6c2bc0SMauro Carvalho Chehab
1353d6c2bc0SMauro Carvalho Chehab if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1363d6c2bc0SMauro Carvalho Chehab if (!dvbdev->readers)
1373d6c2bc0SMauro Carvalho Chehab return -EBUSY;
1383d6c2bc0SMauro Carvalho Chehab dvbdev->readers--;
1393d6c2bc0SMauro Carvalho Chehab } else {
1403d6c2bc0SMauro Carvalho Chehab if (!dvbdev->writers)
1413d6c2bc0SMauro Carvalho Chehab return -EBUSY;
1423d6c2bc0SMauro Carvalho Chehab dvbdev->writers--;
1433d6c2bc0SMauro Carvalho Chehab }
1443d6c2bc0SMauro Carvalho Chehab
1453d6c2bc0SMauro Carvalho Chehab dvbdev->users--;
1463d6c2bc0SMauro Carvalho Chehab return 0;
1473d6c2bc0SMauro Carvalho Chehab }
1483d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_generic_open);
1493d6c2bc0SMauro Carvalho Chehab
dvb_generic_release(struct inode * inode,struct file * file)1503d6c2bc0SMauro Carvalho Chehab int dvb_generic_release(struct inode *inode, struct file *file)
1513d6c2bc0SMauro Carvalho Chehab {
1523d6c2bc0SMauro Carvalho Chehab struct dvb_device *dvbdev = file->private_data;
1533d6c2bc0SMauro Carvalho Chehab
1543d6c2bc0SMauro Carvalho Chehab if (!dvbdev)
1553d6c2bc0SMauro Carvalho Chehab return -ENODEV;
1563d6c2bc0SMauro Carvalho Chehab
157f28701ccSMauro Carvalho Chehab if ((file->f_flags & O_ACCMODE) == O_RDONLY)
1583d6c2bc0SMauro Carvalho Chehab dvbdev->readers++;
159f28701ccSMauro Carvalho Chehab else
1603d6c2bc0SMauro Carvalho Chehab dvbdev->writers++;
1613d6c2bc0SMauro Carvalho Chehab
1623d6c2bc0SMauro Carvalho Chehab dvbdev->users++;
1630fc044b2SLin Ma
1640fc044b2SLin Ma dvb_device_put(dvbdev);
1650fc044b2SLin Ma
1663d6c2bc0SMauro Carvalho Chehab return 0;
1673d6c2bc0SMauro Carvalho Chehab }
1683d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_generic_release);
1693d6c2bc0SMauro Carvalho Chehab
dvb_generic_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1703d6c2bc0SMauro Carvalho Chehab long dvb_generic_ioctl(struct file *file,
1713d6c2bc0SMauro Carvalho Chehab unsigned int cmd, unsigned long arg)
1723d6c2bc0SMauro Carvalho Chehab {
1733d6c2bc0SMauro Carvalho Chehab struct dvb_device *dvbdev = file->private_data;
1743d6c2bc0SMauro Carvalho Chehab
1753d6c2bc0SMauro Carvalho Chehab if (!dvbdev)
1763d6c2bc0SMauro Carvalho Chehab return -ENODEV;
1773d6c2bc0SMauro Carvalho Chehab
1783d6c2bc0SMauro Carvalho Chehab if (!dvbdev->kernel_ioctl)
1793d6c2bc0SMauro Carvalho Chehab return -EINVAL;
1803d6c2bc0SMauro Carvalho Chehab
1813d6c2bc0SMauro Carvalho Chehab return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl);
1823d6c2bc0SMauro Carvalho Chehab }
1833d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_generic_ioctl);
1843d6c2bc0SMauro Carvalho Chehab
dvbdev_get_free_id(struct dvb_adapter * adap,int type)1853d6c2bc0SMauro Carvalho Chehab static int dvbdev_get_free_id(struct dvb_adapter *adap, int type)
1863d6c2bc0SMauro Carvalho Chehab {
1873d6c2bc0SMauro Carvalho Chehab u32 id = 0;
1883d6c2bc0SMauro Carvalho Chehab
1893d6c2bc0SMauro Carvalho Chehab while (id < DVB_MAX_IDS) {
1903d6c2bc0SMauro Carvalho Chehab struct dvb_device *dev;
191f28701ccSMauro Carvalho Chehab
1923d6c2bc0SMauro Carvalho Chehab list_for_each_entry(dev, &adap->device_list, list_head)
1933d6c2bc0SMauro Carvalho Chehab if (dev->type == type && dev->id == id)
1943d6c2bc0SMauro Carvalho Chehab goto skip;
1953d6c2bc0SMauro Carvalho Chehab return id;
1963d6c2bc0SMauro Carvalho Chehab skip:
1973d6c2bc0SMauro Carvalho Chehab id++;
1983d6c2bc0SMauro Carvalho Chehab }
1993d6c2bc0SMauro Carvalho Chehab return -ENFILE;
2003d6c2bc0SMauro Carvalho Chehab }
2013d6c2bc0SMauro Carvalho Chehab
dvb_media_device_free(struct dvb_device * dvbdev)202f50d5166SMauro Carvalho Chehab static void dvb_media_device_free(struct dvb_device *dvbdev)
203f50d5166SMauro Carvalho Chehab {
204f50d5166SMauro Carvalho Chehab #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
205f50d5166SMauro Carvalho Chehab if (dvbdev->entity) {
206f50d5166SMauro Carvalho Chehab media_device_unregister_entity(dvbdev->entity);
207f50d5166SMauro Carvalho Chehab kfree(dvbdev->entity);
208f50d5166SMauro Carvalho Chehab kfree(dvbdev->pads);
209f50d5166SMauro Carvalho Chehab dvbdev->entity = NULL;
210f50d5166SMauro Carvalho Chehab dvbdev->pads = NULL;
211f50d5166SMauro Carvalho Chehab }
212f50d5166SMauro Carvalho Chehab
213f50d5166SMauro Carvalho Chehab if (dvbdev->tsout_entity) {
214f50d5166SMauro Carvalho Chehab int i;
215f50d5166SMauro Carvalho Chehab
216f50d5166SMauro Carvalho Chehab for (i = 0; i < dvbdev->tsout_num_entities; i++) {
217f50d5166SMauro Carvalho Chehab media_device_unregister_entity(&dvbdev->tsout_entity[i]);
218f50d5166SMauro Carvalho Chehab kfree(dvbdev->tsout_entity[i].name);
219f50d5166SMauro Carvalho Chehab }
220f50d5166SMauro Carvalho Chehab kfree(dvbdev->tsout_entity);
221f50d5166SMauro Carvalho Chehab kfree(dvbdev->tsout_pads);
222f50d5166SMauro Carvalho Chehab dvbdev->tsout_entity = NULL;
223f50d5166SMauro Carvalho Chehab dvbdev->tsout_pads = NULL;
224f50d5166SMauro Carvalho Chehab
225f50d5166SMauro Carvalho Chehab dvbdev->tsout_num_entities = 0;
226f50d5166SMauro Carvalho Chehab }
227f50d5166SMauro Carvalho Chehab
228f50d5166SMauro Carvalho Chehab if (dvbdev->intf_devnode) {
229f50d5166SMauro Carvalho Chehab media_devnode_remove(dvbdev->intf_devnode);
230f50d5166SMauro Carvalho Chehab dvbdev->intf_devnode = NULL;
231f50d5166SMauro Carvalho Chehab }
2320230d60eSMauro Carvalho Chehab
2330230d60eSMauro Carvalho Chehab if (dvbdev->adapter->conn) {
2340230d60eSMauro Carvalho Chehab media_device_unregister_entity(dvbdev->adapter->conn);
235bf9a40aeSPeilin Ye kfree(dvbdev->adapter->conn);
2360230d60eSMauro Carvalho Chehab dvbdev->adapter->conn = NULL;
2370230d60eSMauro Carvalho Chehab kfree(dvbdev->adapter->conn_pads);
2380230d60eSMauro Carvalho Chehab dvbdev->adapter->conn_pads = NULL;
2390230d60eSMauro Carvalho Chehab }
240f50d5166SMauro Carvalho Chehab #endif
241f50d5166SMauro Carvalho Chehab }
242f50d5166SMauro Carvalho Chehab
2430820eb5cSMauro Carvalho Chehab #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
dvb_create_tsout_entity(struct dvb_device * dvbdev,const char * name,int npads)244f50d5166SMauro Carvalho Chehab static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
245df2f94e5SMauro Carvalho Chehab const char *name, int npads)
246a0246e02SMauro Carvalho Chehab {
247af0dc3b0SColin Ian King int i;
248df2f94e5SMauro Carvalho Chehab
249df2f94e5SMauro Carvalho Chehab dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads),
250df2f94e5SMauro Carvalho Chehab GFP_KERNEL);
251df2f94e5SMauro Carvalho Chehab if (!dvbdev->tsout_pads)
252f50d5166SMauro Carvalho Chehab return -ENOMEM;
253f50d5166SMauro Carvalho Chehab
254df2f94e5SMauro Carvalho Chehab dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity),
255df2f94e5SMauro Carvalho Chehab GFP_KERNEL);
256f50d5166SMauro Carvalho Chehab if (!dvbdev->tsout_entity)
257f50d5166SMauro Carvalho Chehab return -ENOMEM;
258f50d5166SMauro Carvalho Chehab
259f50d5166SMauro Carvalho Chehab dvbdev->tsout_num_entities = npads;
260f50d5166SMauro Carvalho Chehab
261df2f94e5SMauro Carvalho Chehab for (i = 0; i < npads; i++) {
262df2f94e5SMauro Carvalho Chehab struct media_pad *pads = &dvbdev->tsout_pads[i];
263df2f94e5SMauro Carvalho Chehab struct media_entity *entity = &dvbdev->tsout_entity[i];
264af0dc3b0SColin Ian King int ret;
265df2f94e5SMauro Carvalho Chehab
266df2f94e5SMauro Carvalho Chehab entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i);
267f50d5166SMauro Carvalho Chehab if (!entity->name)
268f50d5166SMauro Carvalho Chehab return -ENOMEM;
269df2f94e5SMauro Carvalho Chehab
2704ca72efaSMauro Carvalho Chehab entity->function = MEDIA_ENT_F_IO_DTV;
271df2f94e5SMauro Carvalho Chehab pads->flags = MEDIA_PAD_FL_SINK;
272df2f94e5SMauro Carvalho Chehab
273ab22e77cSMauro Carvalho Chehab ret = media_entity_pads_init(entity, 1, pads);
274df2f94e5SMauro Carvalho Chehab if (ret < 0)
275f50d5166SMauro Carvalho Chehab return ret;
276df2f94e5SMauro Carvalho Chehab
277df2f94e5SMauro Carvalho Chehab ret = media_device_register_entity(dvbdev->adapter->mdev,
278df2f94e5SMauro Carvalho Chehab entity);
279df2f94e5SMauro Carvalho Chehab if (ret < 0)
280f50d5166SMauro Carvalho Chehab return ret;
281df2f94e5SMauro Carvalho Chehab }
282f50d5166SMauro Carvalho Chehab return 0;
283df2f94e5SMauro Carvalho Chehab }
284df2f94e5SMauro Carvalho Chehab
285df2f94e5SMauro Carvalho Chehab #define DEMUX_TSOUT "demux-tsout"
286df2f94e5SMauro Carvalho Chehab #define DVR_TSOUT "dvr-tsout"
287df2f94e5SMauro Carvalho Chehab
dvb_create_media_entity(struct dvb_device * dvbdev,int type,int demux_sink_pads)288f50d5166SMauro Carvalho Chehab static int dvb_create_media_entity(struct dvb_device *dvbdev,
289df2f94e5SMauro Carvalho Chehab int type, int demux_sink_pads)
290df2f94e5SMauro Carvalho Chehab {
291f50d5166SMauro Carvalho Chehab int i, ret, npads;
292a0246e02SMauro Carvalho Chehab
2938211b187SMauro Carvalho Chehab switch (type) {
2948211b187SMauro Carvalho Chehab case DVB_DEVICE_FRONTEND:
2958211b187SMauro Carvalho Chehab npads = 2;
2968211b187SMauro Carvalho Chehab break;
297df2f94e5SMauro Carvalho Chehab case DVB_DEVICE_DVR:
298f50d5166SMauro Carvalho Chehab ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT,
299f50d5166SMauro Carvalho Chehab demux_sink_pads);
300f50d5166SMauro Carvalho Chehab return ret;
3018211b187SMauro Carvalho Chehab case DVB_DEVICE_DEMUX:
302df2f94e5SMauro Carvalho Chehab npads = 1 + demux_sink_pads;
303f50d5166SMauro Carvalho Chehab ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT,
304f50d5166SMauro Carvalho Chehab demux_sink_pads);
305f50d5166SMauro Carvalho Chehab if (ret < 0)
306f50d5166SMauro Carvalho Chehab return ret;
3078211b187SMauro Carvalho Chehab break;
3088211b187SMauro Carvalho Chehab case DVB_DEVICE_CA:
3098211b187SMauro Carvalho Chehab npads = 2;
3108211b187SMauro Carvalho Chehab break;
3118211b187SMauro Carvalho Chehab case DVB_DEVICE_NET:
3128211b187SMauro Carvalho Chehab /*
3138211b187SMauro Carvalho Chehab * We should be creating entities for the MPE/ULE
3148211b187SMauro Carvalho Chehab * decapsulation hardware (or software implementation).
3158211b187SMauro Carvalho Chehab *
3168211b187SMauro Carvalho Chehab * However, the number of for the MPE/ULE decaps may not be
3178211b187SMauro Carvalho Chehab * fixed. As we don't have yet dynamic support for PADs at
3188211b187SMauro Carvalho Chehab * the Media Controller, let's not create the decap
3198211b187SMauro Carvalho Chehab * entities yet.
3208211b187SMauro Carvalho Chehab */
321f50d5166SMauro Carvalho Chehab return 0;
3228211b187SMauro Carvalho Chehab default:
323f50d5166SMauro Carvalho Chehab return 0;
3248211b187SMauro Carvalho Chehab }
325a0246e02SMauro Carvalho Chehab
326a0246e02SMauro Carvalho Chehab dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL);
327a0246e02SMauro Carvalho Chehab if (!dvbdev->entity)
328f50d5166SMauro Carvalho Chehab return -ENOMEM;
329a0246e02SMauro Carvalho Chehab
330a0246e02SMauro Carvalho Chehab dvbdev->entity->name = dvbdev->name;
331172e9d3cSMauro Carvalho Chehab
332172e9d3cSMauro Carvalho Chehab if (npads) {
333172e9d3cSMauro Carvalho Chehab dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads),
334172e9d3cSMauro Carvalho Chehab GFP_KERNEL);
335fcd5ce4bSWenwen Wang if (!dvbdev->pads) {
336fcd5ce4bSWenwen Wang kfree(dvbdev->entity);
3376b0d0477SKeita Suzuki dvbdev->entity = NULL;
338f50d5166SMauro Carvalho Chehab return -ENOMEM;
339172e9d3cSMauro Carvalho Chehab }
340fcd5ce4bSWenwen Wang }
341172e9d3cSMauro Carvalho Chehab
342a0246e02SMauro Carvalho Chehab switch (type) {
343a0246e02SMauro Carvalho Chehab case DVB_DEVICE_FRONTEND:
3444ca72efaSMauro Carvalho Chehab dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD;
3453bde1b78SMauro Carvalho Chehab dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
3463bde1b78SMauro Carvalho Chehab dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
347a0246e02SMauro Carvalho Chehab break;
348a0246e02SMauro Carvalho Chehab case DVB_DEVICE_DEMUX:
3494ca72efaSMauro Carvalho Chehab dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX;
3503bde1b78SMauro Carvalho Chehab dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
351df2f94e5SMauro Carvalho Chehab for (i = 1; i < npads; i++)
352df2f94e5SMauro Carvalho Chehab dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE;
353a0246e02SMauro Carvalho Chehab break;
354a0246e02SMauro Carvalho Chehab case DVB_DEVICE_CA:
3554ca72efaSMauro Carvalho Chehab dvbdev->entity->function = MEDIA_ENT_F_DTV_CA;
3563bde1b78SMauro Carvalho Chehab dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
3573bde1b78SMauro Carvalho Chehab dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
358a0246e02SMauro Carvalho Chehab break;
359a0246e02SMauro Carvalho Chehab default:
360f50d5166SMauro Carvalho Chehab /* Should never happen, as the first switch prevents it */
361a0246e02SMauro Carvalho Chehab kfree(dvbdev->entity);
362f50d5166SMauro Carvalho Chehab kfree(dvbdev->pads);
363a0246e02SMauro Carvalho Chehab dvbdev->entity = NULL;
364f50d5166SMauro Carvalho Chehab dvbdev->pads = NULL;
365f50d5166SMauro Carvalho Chehab return 0;
366a0246e02SMauro Carvalho Chehab }
367a0246e02SMauro Carvalho Chehab
368f50d5166SMauro Carvalho Chehab if (npads) {
369ab22e77cSMauro Carvalho Chehab ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads);
370f50d5166SMauro Carvalho Chehab if (ret)
371f50d5166SMauro Carvalho Chehab return ret;
372f50d5166SMauro Carvalho Chehab }
373a0246e02SMauro Carvalho Chehab ret = media_device_register_entity(dvbdev->adapter->mdev,
374a0246e02SMauro Carvalho Chehab dvbdev->entity);
375f50d5166SMauro Carvalho Chehab if (ret)
376eac287adSXiubo Li return ret;
377a0246e02SMauro Carvalho Chehab
378b3ad24d2SMauro Carvalho Chehab pr_info("%s: media entity '%s' registered.\n",
379a0246e02SMauro Carvalho Chehab __func__, dvbdev->entity->name);
380f50d5166SMauro Carvalho Chehab
381f50d5166SMauro Carvalho Chehab return 0;
382a0246e02SMauro Carvalho Chehab }
3830820eb5cSMauro Carvalho Chehab #endif
3843d6c2bc0SMauro Carvalho Chehab
dvb_register_media_device(struct dvb_device * dvbdev,int type,int minor,unsigned int demux_sink_pads)385f50d5166SMauro Carvalho Chehab static int dvb_register_media_device(struct dvb_device *dvbdev,
386df2f94e5SMauro Carvalho Chehab int type, int minor,
387f28701ccSMauro Carvalho Chehab unsigned int demux_sink_pads)
3888211b187SMauro Carvalho Chehab {
3898211b187SMauro Carvalho Chehab #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
390f50d5166SMauro Carvalho Chehab struct media_link *link;
3918211b187SMauro Carvalho Chehab u32 intf_type;
392f50d5166SMauro Carvalho Chehab int ret;
3938211b187SMauro Carvalho Chehab
3948211b187SMauro Carvalho Chehab if (!dvbdev->adapter->mdev)
395f50d5166SMauro Carvalho Chehab return 0;
3968211b187SMauro Carvalho Chehab
397f50d5166SMauro Carvalho Chehab ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads);
398f50d5166SMauro Carvalho Chehab if (ret)
399f50d5166SMauro Carvalho Chehab return ret;
4008211b187SMauro Carvalho Chehab
4018211b187SMauro Carvalho Chehab switch (type) {
4028211b187SMauro Carvalho Chehab case DVB_DEVICE_FRONTEND:
4038211b187SMauro Carvalho Chehab intf_type = MEDIA_INTF_T_DVB_FE;
4048211b187SMauro Carvalho Chehab break;
4058211b187SMauro Carvalho Chehab case DVB_DEVICE_DEMUX:
4068211b187SMauro Carvalho Chehab intf_type = MEDIA_INTF_T_DVB_DEMUX;
4078211b187SMauro Carvalho Chehab break;
4088211b187SMauro Carvalho Chehab case DVB_DEVICE_DVR:
4098211b187SMauro Carvalho Chehab intf_type = MEDIA_INTF_T_DVB_DVR;
4108211b187SMauro Carvalho Chehab break;
4118211b187SMauro Carvalho Chehab case DVB_DEVICE_CA:
4128211b187SMauro Carvalho Chehab intf_type = MEDIA_INTF_T_DVB_CA;
4138211b187SMauro Carvalho Chehab break;
4148211b187SMauro Carvalho Chehab case DVB_DEVICE_NET:
4158211b187SMauro Carvalho Chehab intf_type = MEDIA_INTF_T_DVB_NET;
4168211b187SMauro Carvalho Chehab break;
4178211b187SMauro Carvalho Chehab default:
418f50d5166SMauro Carvalho Chehab return 0;
4198211b187SMauro Carvalho Chehab }
4208211b187SMauro Carvalho Chehab
4218211b187SMauro Carvalho Chehab dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev,
4228211b187SMauro Carvalho Chehab intf_type, 0,
4230b3b72dfSMauro Carvalho Chehab DVB_MAJOR, minor);
4248211b187SMauro Carvalho Chehab
425f50d5166SMauro Carvalho Chehab if (!dvbdev->intf_devnode)
426f50d5166SMauro Carvalho Chehab return -ENOMEM;
427f50d5166SMauro Carvalho Chehab
4288211b187SMauro Carvalho Chehab /*
4298211b187SMauro Carvalho Chehab * Create the "obvious" link, e. g. the ones that represent
4308211b187SMauro Carvalho Chehab * a direct association between an interface and an entity.
4318211b187SMauro Carvalho Chehab * Other links should be created elsewhere, like:
4328211b187SMauro Carvalho Chehab * DVB FE intf -> tuner
4338211b187SMauro Carvalho Chehab * DVB demux intf -> dvr
4348211b187SMauro Carvalho Chehab */
4358211b187SMauro Carvalho Chehab
436f50d5166SMauro Carvalho Chehab if (!dvbdev->entity)
437f50d5166SMauro Carvalho Chehab return 0;
4388211b187SMauro Carvalho Chehab
4394d1e4545SHans Verkuil link = media_create_intf_link(dvbdev->entity,
4404d1e4545SHans Verkuil &dvbdev->intf_devnode->intf,
4414d1e4545SHans Verkuil MEDIA_LNK_FL_ENABLED |
4424d1e4545SHans Verkuil MEDIA_LNK_FL_IMMUTABLE);
443f50d5166SMauro Carvalho Chehab if (!link)
444f50d5166SMauro Carvalho Chehab return -ENOMEM;
4458211b187SMauro Carvalho Chehab #endif
446f50d5166SMauro Carvalho Chehab return 0;
4478211b187SMauro Carvalho Chehab }
4488211b187SMauro Carvalho Chehab
dvb_register_device(struct dvb_adapter * adap,struct dvb_device ** pdvbdev,const struct dvb_device * template,void * priv,enum dvb_device_type type,int demux_sink_pads)4493d6c2bc0SMauro Carvalho Chehab int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
4506bbf7a85SMauro Carvalho Chehab const struct dvb_device *template, void *priv,
4516bbf7a85SMauro Carvalho Chehab enum dvb_device_type type, int demux_sink_pads)
4523d6c2bc0SMauro Carvalho Chehab {
4533d6c2bc0SMauro Carvalho Chehab struct dvb_device *dvbdev;
454627bb528SHyunwoo Kim struct file_operations *dvbdevfops = NULL;
455627bb528SHyunwoo Kim struct dvbdevfops_node *node = NULL, *new_node = NULL;
4563d6c2bc0SMauro Carvalho Chehab struct device *clsdev;
4573d6c2bc0SMauro Carvalho Chehab int minor;
458f50d5166SMauro Carvalho Chehab int id, ret;
4593d6c2bc0SMauro Carvalho Chehab
4603d6c2bc0SMauro Carvalho Chehab mutex_lock(&dvbdev_register_lock);
4613d6c2bc0SMauro Carvalho Chehab
462f28701ccSMauro Carvalho Chehab id = dvbdev_get_free_id(adap, type);
463f28701ccSMauro Carvalho Chehab if (id < 0) {
4643d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
4653d6c2bc0SMauro Carvalho Chehab *pdvbdev = NULL;
466b3ad24d2SMauro Carvalho Chehab pr_err("%s: couldn't find free device id\n", __func__);
4673d6c2bc0SMauro Carvalho Chehab return -ENFILE;
4683d6c2bc0SMauro Carvalho Chehab }
4693d6c2bc0SMauro Carvalho Chehab
470f50d5166SMauro Carvalho Chehab *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL);
4713d6c2bc0SMauro Carvalho Chehab if (!dvbdev) {
4723d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
4733d6c2bc0SMauro Carvalho Chehab return -ENOMEM;
4743d6c2bc0SMauro Carvalho Chehab }
4753d6c2bc0SMauro Carvalho Chehab
476627bb528SHyunwoo Kim /*
477627bb528SHyunwoo Kim * When a device of the same type is probe()d more than once,
478627bb528SHyunwoo Kim * the first allocated fops are used. This prevents memory leaks
479627bb528SHyunwoo Kim * that can occur when the same device is probe()d repeatedly.
480627bb528SHyunwoo Kim */
481627bb528SHyunwoo Kim list_for_each_entry(node, &dvbdevfops_list, list_head) {
482627bb528SHyunwoo Kim if (node->fops->owner == adap->module &&
483f28701ccSMauro Carvalho Chehab node->type == type && node->template == template) {
484627bb528SHyunwoo Kim dvbdevfops = node->fops;
485627bb528SHyunwoo Kim break;
486627bb528SHyunwoo Kim }
487627bb528SHyunwoo Kim }
4883d6c2bc0SMauro Carvalho Chehab
489f28701ccSMauro Carvalho Chehab if (!dvbdevfops) {
490627bb528SHyunwoo Kim dvbdevfops = kmemdup(template->fops, sizeof(*dvbdevfops), GFP_KERNEL);
4913d6c2bc0SMauro Carvalho Chehab if (!dvbdevfops) {
4923d6c2bc0SMauro Carvalho Chehab kfree(dvbdev);
4938c64f4cdSZhipeng Lu *pdvbdev = NULL;
4943d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
4953d6c2bc0SMauro Carvalho Chehab return -ENOMEM;
4963d6c2bc0SMauro Carvalho Chehab }
4973d6c2bc0SMauro Carvalho Chehab
498f28701ccSMauro Carvalho Chehab new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
499627bb528SHyunwoo Kim if (!new_node) {
500627bb528SHyunwoo Kim kfree(dvbdevfops);
501627bb528SHyunwoo Kim kfree(dvbdev);
5028c64f4cdSZhipeng Lu *pdvbdev = NULL;
503627bb528SHyunwoo Kim mutex_unlock(&dvbdev_register_lock);
504627bb528SHyunwoo Kim return -ENOMEM;
505627bb528SHyunwoo Kim }
506627bb528SHyunwoo Kim
507627bb528SHyunwoo Kim new_node->fops = dvbdevfops;
508627bb528SHyunwoo Kim new_node->type = type;
509627bb528SHyunwoo Kim new_node->template = template;
510627bb528SHyunwoo Kim list_add_tail(&new_node->list_head, &dvbdevfops_list);
511627bb528SHyunwoo Kim }
512627bb528SHyunwoo Kim
5133d6c2bc0SMauro Carvalho Chehab memcpy(dvbdev, template, sizeof(struct dvb_device));
5143a664569SLin Ma kref_init(&dvbdev->ref);
5153d6c2bc0SMauro Carvalho Chehab dvbdev->type = type;
5163d6c2bc0SMauro Carvalho Chehab dvbdev->id = id;
5173d6c2bc0SMauro Carvalho Chehab dvbdev->adapter = adap;
5183d6c2bc0SMauro Carvalho Chehab dvbdev->priv = priv;
5193d6c2bc0SMauro Carvalho Chehab dvbdev->fops = dvbdevfops;
5203d6c2bc0SMauro Carvalho Chehab init_waitqueue_head(&dvbdev->wait_queue);
5213d6c2bc0SMauro Carvalho Chehab dvbdevfops->owner = adap->module;
5223d6c2bc0SMauro Carvalho Chehab list_add_tail(&dvbdev->list_head, &adap->device_list);
5233d6c2bc0SMauro Carvalho Chehab down_write(&minor_rwsem);
5243d6c2bc0SMauro Carvalho Chehab #ifdef CONFIG_DVB_DYNAMIC_MINORS
5253d6c2bc0SMauro Carvalho Chehab for (minor = 0; minor < MAX_DVB_MINORS; minor++)
526f28701ccSMauro Carvalho Chehab if (!dvb_minors[minor])
5273d6c2bc0SMauro Carvalho Chehab break;
5283d6c2bc0SMauro Carvalho Chehab if (minor == MAX_DVB_MINORS) {
529627bb528SHyunwoo Kim if (new_node) {
530627bb528SHyunwoo Kim list_del(&new_node->list_head);
5313d6c2bc0SMauro Carvalho Chehab kfree(dvbdevfops);
532627bb528SHyunwoo Kim kfree(new_node);
533627bb528SHyunwoo Kim }
534627bb528SHyunwoo Kim list_del(&dvbdev->list_head);
5353d6c2bc0SMauro Carvalho Chehab kfree(dvbdev);
5368c64f4cdSZhipeng Lu *pdvbdev = NULL;
5373d6c2bc0SMauro Carvalho Chehab up_write(&minor_rwsem);
5383d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
5393d6c2bc0SMauro Carvalho Chehab return -EINVAL;
5403d6c2bc0SMauro Carvalho Chehab }
5413d6c2bc0SMauro Carvalho Chehab #else
5423d6c2bc0SMauro Carvalho Chehab minor = nums2minor(adap->num, type, id);
5433d6c2bc0SMauro Carvalho Chehab #endif
5443d6c2bc0SMauro Carvalho Chehab dvbdev->minor = minor;
5450fc044b2SLin Ma dvb_minors[minor] = dvb_device_get(dvbdev);
5463d6c2bc0SMauro Carvalho Chehab up_write(&minor_rwsem);
547f50d5166SMauro Carvalho Chehab ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads);
548f50d5166SMauro Carvalho Chehab if (ret) {
549b3ad24d2SMauro Carvalho Chehab pr_err("%s: dvb_register_media_device failed to create the mediagraph\n",
550f50d5166SMauro Carvalho Chehab __func__);
551627bb528SHyunwoo Kim if (new_node) {
552627bb528SHyunwoo Kim list_del(&new_node->list_head);
553627bb528SHyunwoo Kim kfree(dvbdevfops);
554627bb528SHyunwoo Kim kfree(new_node);
555627bb528SHyunwoo Kim }
556f50d5166SMauro Carvalho Chehab dvb_media_device_free(dvbdev);
5571fec2eccSMauro Carvalho Chehab list_del(&dvbdev->list_head);
558f50d5166SMauro Carvalho Chehab kfree(dvbdev);
5598c64f4cdSZhipeng Lu *pdvbdev = NULL;
560f50d5166SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
561f50d5166SMauro Carvalho Chehab return ret;
562f50d5166SMauro Carvalho Chehab }
563f50d5166SMauro Carvalho Chehab
5643d6c2bc0SMauro Carvalho Chehab clsdev = device_create(dvb_class, adap->device,
5653d6c2bc0SMauro Carvalho Chehab MKDEV(DVB_MAJOR, minor),
5663d6c2bc0SMauro Carvalho Chehab dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id);
5673d6c2bc0SMauro Carvalho Chehab if (IS_ERR(clsdev)) {
568b3ad24d2SMauro Carvalho Chehab pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
5693d6c2bc0SMauro Carvalho Chehab __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
570627bb528SHyunwoo Kim if (new_node) {
571627bb528SHyunwoo Kim list_del(&new_node->list_head);
572627bb528SHyunwoo Kim kfree(dvbdevfops);
573627bb528SHyunwoo Kim kfree(new_node);
574627bb528SHyunwoo Kim }
575167faadfSDinghao Liu dvb_media_device_free(dvbdev);
5761fec2eccSMauro Carvalho Chehab list_del(&dvbdev->list_head);
577167faadfSDinghao Liu kfree(dvbdev);
5788c64f4cdSZhipeng Lu *pdvbdev = NULL;
579627bb528SHyunwoo Kim mutex_unlock(&dvbdev_register_lock);
5803d6c2bc0SMauro Carvalho Chehab return PTR_ERR(clsdev);
5813d6c2bc0SMauro Carvalho Chehab }
582627bb528SHyunwoo Kim
583b3ad24d2SMauro Carvalho Chehab dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
5843d6c2bc0SMauro Carvalho Chehab adap->num, dnames[type], id, minor, minor);
5853d6c2bc0SMauro Carvalho Chehab
586627bb528SHyunwoo Kim mutex_unlock(&dvbdev_register_lock);
5873d6c2bc0SMauro Carvalho Chehab return 0;
5883d6c2bc0SMauro Carvalho Chehab }
5893d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_register_device);
5903d6c2bc0SMauro Carvalho Chehab
dvb_remove_device(struct dvb_device * dvbdev)5911f4ed6cdSMax Kellermann void dvb_remove_device(struct dvb_device *dvbdev)
5923d6c2bc0SMauro Carvalho Chehab {
5933d6c2bc0SMauro Carvalho Chehab if (!dvbdev)
5943d6c2bc0SMauro Carvalho Chehab return;
5953d6c2bc0SMauro Carvalho Chehab
5963d6c2bc0SMauro Carvalho Chehab down_write(&minor_rwsem);
5973d6c2bc0SMauro Carvalho Chehab dvb_minors[dvbdev->minor] = NULL;
5980fc044b2SLin Ma dvb_device_put(dvbdev);
5993d6c2bc0SMauro Carvalho Chehab up_write(&minor_rwsem);
6003d6c2bc0SMauro Carvalho Chehab
601f50d5166SMauro Carvalho Chehab dvb_media_device_free(dvbdev);
602f50d5166SMauro Carvalho Chehab
6033d6c2bc0SMauro Carvalho Chehab device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));
6043d6c2bc0SMauro Carvalho Chehab
6053d6c2bc0SMauro Carvalho Chehab list_del(&dvbdev->list_head);
6061f4ed6cdSMax Kellermann }
6071f4ed6cdSMax Kellermann EXPORT_SYMBOL(dvb_remove_device);
6081f4ed6cdSMax Kellermann
dvb_free_device(struct kref * ref)6090fc044b2SLin Ma static void dvb_free_device(struct kref *ref)
6101f4ed6cdSMax Kellermann {
6110fc044b2SLin Ma struct dvb_device *dvbdev = container_of(ref, struct dvb_device, ref);
6121f4ed6cdSMax Kellermann
6133d6c2bc0SMauro Carvalho Chehab kfree(dvbdev);
6143d6c2bc0SMauro Carvalho Chehab }
6150fc044b2SLin Ma
dvb_device_get(struct dvb_device * dvbdev)6160fc044b2SLin Ma struct dvb_device *dvb_device_get(struct dvb_device *dvbdev)
6170fc044b2SLin Ma {
6180fc044b2SLin Ma kref_get(&dvbdev->ref);
6190fc044b2SLin Ma return dvbdev;
6200fc044b2SLin Ma }
6210fc044b2SLin Ma EXPORT_SYMBOL(dvb_device_get);
6220fc044b2SLin Ma
dvb_device_put(struct dvb_device * dvbdev)6230fc044b2SLin Ma void dvb_device_put(struct dvb_device *dvbdev)
6240fc044b2SLin Ma {
6250fc044b2SLin Ma if (dvbdev)
6260fc044b2SLin Ma kref_put(&dvbdev->ref, dvb_free_device);
6270fc044b2SLin Ma }
6281f4ed6cdSMax Kellermann
dvb_unregister_device(struct dvb_device * dvbdev)6291f4ed6cdSMax Kellermann void dvb_unregister_device(struct dvb_device *dvbdev)
6301f4ed6cdSMax Kellermann {
6311f4ed6cdSMax Kellermann dvb_remove_device(dvbdev);
6320fc044b2SLin Ma dvb_device_put(dvbdev);
6331f4ed6cdSMax Kellermann }
6343d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_unregister_device);
6353d6c2bc0SMauro Carvalho Chehab
6364155109aSMauro Carvalho Chehab #ifdef CONFIG_MEDIA_CONTROLLER_DVB
63717813e2aSMauro Carvalho Chehab
dvb_create_io_intf_links(struct dvb_adapter * adap,struct media_interface * intf,char * name)63817813e2aSMauro Carvalho Chehab static int dvb_create_io_intf_links(struct dvb_adapter *adap,
63917813e2aSMauro Carvalho Chehab struct media_interface *intf,
64017813e2aSMauro Carvalho Chehab char *name)
64117813e2aSMauro Carvalho Chehab {
64217813e2aSMauro Carvalho Chehab struct media_device *mdev = adap->mdev;
64317813e2aSMauro Carvalho Chehab struct media_entity *entity;
64417813e2aSMauro Carvalho Chehab struct media_link *link;
64517813e2aSMauro Carvalho Chehab
64617813e2aSMauro Carvalho Chehab media_device_for_each_entity(entity, mdev) {
64717813e2aSMauro Carvalho Chehab if (entity->function == MEDIA_ENT_F_IO_DTV) {
64817813e2aSMauro Carvalho Chehab if (strncmp(entity->name, name, strlen(name)))
64917813e2aSMauro Carvalho Chehab continue;
65017813e2aSMauro Carvalho Chehab link = media_create_intf_link(entity, intf,
6514d1e4545SHans Verkuil MEDIA_LNK_FL_ENABLED |
6524d1e4545SHans Verkuil MEDIA_LNK_FL_IMMUTABLE);
65317813e2aSMauro Carvalho Chehab if (!link)
65417813e2aSMauro Carvalho Chehab return -ENOMEM;
65517813e2aSMauro Carvalho Chehab }
65617813e2aSMauro Carvalho Chehab }
65717813e2aSMauro Carvalho Chehab return 0;
65817813e2aSMauro Carvalho Chehab }
65917813e2aSMauro Carvalho Chehab
dvb_create_media_graph(struct dvb_adapter * adap,bool create_rf_connector)6600230d60eSMauro Carvalho Chehab int dvb_create_media_graph(struct dvb_adapter *adap,
6610230d60eSMauro Carvalho Chehab bool create_rf_connector)
662480884b6SMauro Carvalho Chehab {
663480884b6SMauro Carvalho Chehab struct media_device *mdev = adap->mdev;
6640230d60eSMauro Carvalho Chehab struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn;
665df2f94e5SMauro Carvalho Chehab struct media_entity *demux = NULL, *ca = NULL;
666f50d5166SMauro Carvalho Chehab struct media_link *link;
6678ddb90d2SMauro Carvalho Chehab struct media_interface *intf;
668f28701ccSMauro Carvalho Chehab unsigned int demux_pad = 0;
669f28701ccSMauro Carvalho Chehab unsigned int dvr_pad = 0;
670f28701ccSMauro Carvalho Chehab unsigned int ntuner = 0, ndemod = 0;
671f3efe15aSMauro Carvalho Chehab int ret, pad_source, pad_sink;
6720230d60eSMauro Carvalho Chehab static const char *connector_name = "Television";
6734155109aSMauro Carvalho Chehab
6744155109aSMauro Carvalho Chehab if (!mdev)
675f50d5166SMauro Carvalho Chehab return 0;
6764155109aSMauro Carvalho Chehab
6774155109aSMauro Carvalho Chehab media_device_for_each_entity(entity, mdev) {
6780e576b76SMauro Carvalho Chehab switch (entity->function) {
6794ca72efaSMauro Carvalho Chehab case MEDIA_ENT_F_TUNER:
6804155109aSMauro Carvalho Chehab tuner = entity;
681a0cce2a0SMauro Carvalho Chehab ntuner++;
6824155109aSMauro Carvalho Chehab break;
6834ca72efaSMauro Carvalho Chehab case MEDIA_ENT_F_DTV_DEMOD:
68432fdc0e1SMauro Carvalho Chehab demod = entity;
685a0cce2a0SMauro Carvalho Chehab ndemod++;
6864155109aSMauro Carvalho Chehab break;
6874ca72efaSMauro Carvalho Chehab case MEDIA_ENT_F_TS_DEMUX:
6884155109aSMauro Carvalho Chehab demux = entity;
6894155109aSMauro Carvalho Chehab break;
6904ca72efaSMauro Carvalho Chehab case MEDIA_ENT_F_DTV_CA:
6914155109aSMauro Carvalho Chehab ca = entity;
6924155109aSMauro Carvalho Chehab break;
6934155109aSMauro Carvalho Chehab }
6944155109aSMauro Carvalho Chehab }
6954155109aSMauro Carvalho Chehab
696a0cce2a0SMauro Carvalho Chehab /*
697a0cce2a0SMauro Carvalho Chehab * Prepare to signalize to media_create_pad_links() that multiple
698a0cce2a0SMauro Carvalho Chehab * entities of the same type exists and a 1:n or n:1 links need to be
699a0cce2a0SMauro Carvalho Chehab * created.
700a0cce2a0SMauro Carvalho Chehab * NOTE: if both tuner and demod have multiple instances, it is up
701a0cce2a0SMauro Carvalho Chehab * to the caller driver to create such links.
702a0cce2a0SMauro Carvalho Chehab */
703a0cce2a0SMauro Carvalho Chehab if (ntuner > 1)
704a0cce2a0SMauro Carvalho Chehab tuner = NULL;
705a0cce2a0SMauro Carvalho Chehab if (ndemod > 1)
706a0cce2a0SMauro Carvalho Chehab demod = NULL;
707a0cce2a0SMauro Carvalho Chehab
7080230d60eSMauro Carvalho Chehab if (create_rf_connector) {
7090230d60eSMauro Carvalho Chehab conn = kzalloc(sizeof(*conn), GFP_KERNEL);
7100230d60eSMauro Carvalho Chehab if (!conn)
7110230d60eSMauro Carvalho Chehab return -ENOMEM;
7120230d60eSMauro Carvalho Chehab adap->conn = conn;
7130230d60eSMauro Carvalho Chehab
7145c3fbc5eSXiubo Li adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL);
7150230d60eSMauro Carvalho Chehab if (!adap->conn_pads)
7160230d60eSMauro Carvalho Chehab return -ENOMEM;
7170230d60eSMauro Carvalho Chehab
7180230d60eSMauro Carvalho Chehab conn->flags = MEDIA_ENT_FL_CONNECTOR;
7190230d60eSMauro Carvalho Chehab conn->function = MEDIA_ENT_F_CONN_RF;
7200230d60eSMauro Carvalho Chehab conn->name = connector_name;
7210230d60eSMauro Carvalho Chehab adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE;
7220230d60eSMauro Carvalho Chehab
7230230d60eSMauro Carvalho Chehab ret = media_entity_pads_init(conn, 1, adap->conn_pads);
7240230d60eSMauro Carvalho Chehab if (ret)
7250230d60eSMauro Carvalho Chehab return ret;
7260230d60eSMauro Carvalho Chehab
7270230d60eSMauro Carvalho Chehab ret = media_device_register_entity(mdev, conn);
7280230d60eSMauro Carvalho Chehab if (ret)
7290230d60eSMauro Carvalho Chehab return ret;
7300230d60eSMauro Carvalho Chehab
731f3efe15aSMauro Carvalho Chehab if (!ntuner) {
732a0cce2a0SMauro Carvalho Chehab ret = media_create_pad_links(mdev,
733a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_CONN_RF,
734a0cce2a0SMauro Carvalho Chehab conn, 0,
735a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_DTV_DEMOD,
7360230d60eSMauro Carvalho Chehab demod, 0,
737a0cce2a0SMauro Carvalho Chehab MEDIA_LNK_FL_ENABLED,
738a0cce2a0SMauro Carvalho Chehab false);
739f3efe15aSMauro Carvalho Chehab } else {
7404fd463e9SSakari Ailus pad_sink = media_get_pad_index(tuner, MEDIA_PAD_FL_SINK,
741f3efe15aSMauro Carvalho Chehab PAD_SIGNAL_ANALOG);
742f3efe15aSMauro Carvalho Chehab if (pad_sink < 0)
743f3efe15aSMauro Carvalho Chehab return -EINVAL;
744a0cce2a0SMauro Carvalho Chehab ret = media_create_pad_links(mdev,
745a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_CONN_RF,
746a0cce2a0SMauro Carvalho Chehab conn, 0,
747a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_TUNER,
748f3efe15aSMauro Carvalho Chehab tuner, pad_sink,
749a0cce2a0SMauro Carvalho Chehab MEDIA_LNK_FL_ENABLED,
750a0cce2a0SMauro Carvalho Chehab false);
751f3efe15aSMauro Carvalho Chehab }
7520230d60eSMauro Carvalho Chehab if (ret)
7530230d60eSMauro Carvalho Chehab return ret;
7540230d60eSMauro Carvalho Chehab }
7550230d60eSMauro Carvalho Chehab
756a0cce2a0SMauro Carvalho Chehab if (ntuner && ndemod) {
7579f984cacSBrad Love /* NOTE: first found tuner source pad presumed correct */
7584fd463e9SSakari Ailus pad_source = media_get_pad_index(tuner, MEDIA_PAD_FL_SOURCE,
759f3efe15aSMauro Carvalho Chehab PAD_SIGNAL_ANALOG);
7609f984cacSBrad Love if (pad_source < 0)
761f3efe15aSMauro Carvalho Chehab return -EINVAL;
762a0cce2a0SMauro Carvalho Chehab ret = media_create_pad_links(mdev,
763a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_TUNER,
764f3efe15aSMauro Carvalho Chehab tuner, pad_source,
765a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_DTV_DEMOD,
766a0cce2a0SMauro Carvalho Chehab demod, 0, MEDIA_LNK_FL_ENABLED,
767a0cce2a0SMauro Carvalho Chehab false);
768f50d5166SMauro Carvalho Chehab if (ret)
769f50d5166SMauro Carvalho Chehab return ret;
770f50d5166SMauro Carvalho Chehab }
7714155109aSMauro Carvalho Chehab
772a0cce2a0SMauro Carvalho Chehab if (ndemod && demux) {
773a0cce2a0SMauro Carvalho Chehab ret = media_create_pad_links(mdev,
774a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_DTV_DEMOD,
775a0cce2a0SMauro Carvalho Chehab demod, 1,
776a0cce2a0SMauro Carvalho Chehab MEDIA_ENT_F_TS_DEMUX,
777a0cce2a0SMauro Carvalho Chehab demux, 0, MEDIA_LNK_FL_ENABLED,
778a0cce2a0SMauro Carvalho Chehab false);
779f50d5166SMauro Carvalho Chehab if (ret)
780acc37e8fSMax Kellermann return ret;
781f50d5166SMauro Carvalho Chehab }
782f50d5166SMauro Carvalho Chehab if (demux && ca) {
783f50d5166SMauro Carvalho Chehab ret = media_create_pad_link(demux, 1, ca,
784f50d5166SMauro Carvalho Chehab 0, MEDIA_LNK_FL_ENABLED);
785711f3fbaSOlli Salonen if (ret)
786acc37e8fSMax Kellermann return ret;
787f50d5166SMauro Carvalho Chehab }
7888ddb90d2SMauro Carvalho Chehab
789df2f94e5SMauro Carvalho Chehab /* Create demux links for each ringbuffer/pad */
790df2f94e5SMauro Carvalho Chehab if (demux) {
791df2f94e5SMauro Carvalho Chehab media_device_for_each_entity(entity, mdev) {
7924ca72efaSMauro Carvalho Chehab if (entity->function == MEDIA_ENT_F_IO_DTV) {
793df2f94e5SMauro Carvalho Chehab if (!strncmp(entity->name, DVR_TSOUT,
794f50d5166SMauro Carvalho Chehab strlen(DVR_TSOUT))) {
795f50d5166SMauro Carvalho Chehab ret = media_create_pad_link(demux,
796df2f94e5SMauro Carvalho Chehab ++dvr_pad,
797df2f94e5SMauro Carvalho Chehab entity, 0, 0);
798f50d5166SMauro Carvalho Chehab if (ret)
799f50d5166SMauro Carvalho Chehab return ret;
800f50d5166SMauro Carvalho Chehab }
801df2f94e5SMauro Carvalho Chehab if (!strncmp(entity->name, DEMUX_TSOUT,
802f50d5166SMauro Carvalho Chehab strlen(DEMUX_TSOUT))) {
803f50d5166SMauro Carvalho Chehab ret = media_create_pad_link(demux,
804df2f94e5SMauro Carvalho Chehab ++demux_pad,
805df2f94e5SMauro Carvalho Chehab entity, 0, 0);
806f50d5166SMauro Carvalho Chehab if (ret)
807f50d5166SMauro Carvalho Chehab return ret;
808f50d5166SMauro Carvalho Chehab }
809df2f94e5SMauro Carvalho Chehab }
810df2f94e5SMauro Carvalho Chehab }
811df2f94e5SMauro Carvalho Chehab }
812df2f94e5SMauro Carvalho Chehab
8138ed07142SMauro Carvalho Chehab /* Create interface links for FE->tuner, DVR->demux and CA->ca */
814cf975a4bSMauro Carvalho Chehab media_device_for_each_intf(intf, mdev) {
815f50d5166SMauro Carvalho Chehab if (intf->type == MEDIA_INTF_T_DVB_CA && ca) {
816f50d5166SMauro Carvalho Chehab link = media_create_intf_link(ca, intf,
8174d1e4545SHans Verkuil MEDIA_LNK_FL_ENABLED |
8184d1e4545SHans Verkuil MEDIA_LNK_FL_IMMUTABLE);
819f50d5166SMauro Carvalho Chehab if (!link)
820f50d5166SMauro Carvalho Chehab return -ENOMEM;
821f50d5166SMauro Carvalho Chehab }
822df2f94e5SMauro Carvalho Chehab
823f50d5166SMauro Carvalho Chehab if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) {
824f50d5166SMauro Carvalho Chehab link = media_create_intf_link(tuner, intf,
8254d1e4545SHans Verkuil MEDIA_LNK_FL_ENABLED |
8264d1e4545SHans Verkuil MEDIA_LNK_FL_IMMUTABLE);
827f50d5166SMauro Carvalho Chehab if (!link)
828f50d5166SMauro Carvalho Chehab return -ENOMEM;
829f50d5166SMauro Carvalho Chehab }
8308ed07142SMauro Carvalho Chehab #if 0
8318ed07142SMauro Carvalho Chehab /*
8328ed07142SMauro Carvalho Chehab * Indirect link - let's not create yet, as we don't know how
8338ed07142SMauro Carvalho Chehab * to handle indirect links, nor if this will
8348ed07142SMauro Carvalho Chehab * actually be needed.
8358ed07142SMauro Carvalho Chehab */
836f50d5166SMauro Carvalho Chehab if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) {
837f50d5166SMauro Carvalho Chehab link = media_create_intf_link(demux, intf,
8384d1e4545SHans Verkuil MEDIA_LNK_FL_ENABLED |
8394d1e4545SHans Verkuil MEDIA_LNK_FL_IMMUTABLE);
840f50d5166SMauro Carvalho Chehab if (!link)
841f50d5166SMauro Carvalho Chehab return -ENOMEM;
842f50d5166SMauro Carvalho Chehab }
8438ed07142SMauro Carvalho Chehab #endif
84417813e2aSMauro Carvalho Chehab if (intf->type == MEDIA_INTF_T_DVB_DVR) {
84517813e2aSMauro Carvalho Chehab ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT);
84617813e2aSMauro Carvalho Chehab if (ret)
84717813e2aSMauro Carvalho Chehab return ret;
848f50d5166SMauro Carvalho Chehab }
84917813e2aSMauro Carvalho Chehab if (intf->type == MEDIA_INTF_T_DVB_DEMUX) {
85017813e2aSMauro Carvalho Chehab ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT);
85117813e2aSMauro Carvalho Chehab if (ret)
85217813e2aSMauro Carvalho Chehab return ret;
853df2f94e5SMauro Carvalho Chehab }
8548ddb90d2SMauro Carvalho Chehab }
855f50d5166SMauro Carvalho Chehab return 0;
8564155109aSMauro Carvalho Chehab }
8574155109aSMauro Carvalho Chehab EXPORT_SYMBOL_GPL(dvb_create_media_graph);
858480884b6SMauro Carvalho Chehab #endif
8594155109aSMauro Carvalho Chehab
dvbdev_check_free_adapter_num(int num)8603d6c2bc0SMauro Carvalho Chehab static int dvbdev_check_free_adapter_num(int num)
8613d6c2bc0SMauro Carvalho Chehab {
8623d6c2bc0SMauro Carvalho Chehab struct list_head *entry;
863f28701ccSMauro Carvalho Chehab
8643d6c2bc0SMauro Carvalho Chehab list_for_each(entry, &dvb_adapter_list) {
8653d6c2bc0SMauro Carvalho Chehab struct dvb_adapter *adap;
866f28701ccSMauro Carvalho Chehab
8673d6c2bc0SMauro Carvalho Chehab adap = list_entry(entry, struct dvb_adapter, list_head);
8683d6c2bc0SMauro Carvalho Chehab if (adap->num == num)
8693d6c2bc0SMauro Carvalho Chehab return 0;
8703d6c2bc0SMauro Carvalho Chehab }
8713d6c2bc0SMauro Carvalho Chehab return 1;
8723d6c2bc0SMauro Carvalho Chehab }
8733d6c2bc0SMauro Carvalho Chehab
dvbdev_get_free_adapter_num(void)8743d6c2bc0SMauro Carvalho Chehab static int dvbdev_get_free_adapter_num(void)
8753d6c2bc0SMauro Carvalho Chehab {
8763d6c2bc0SMauro Carvalho Chehab int num = 0;
8773d6c2bc0SMauro Carvalho Chehab
8783d6c2bc0SMauro Carvalho Chehab while (num < DVB_MAX_ADAPTERS) {
8793d6c2bc0SMauro Carvalho Chehab if (dvbdev_check_free_adapter_num(num))
8803d6c2bc0SMauro Carvalho Chehab return num;
8813d6c2bc0SMauro Carvalho Chehab num++;
8823d6c2bc0SMauro Carvalho Chehab }
8833d6c2bc0SMauro Carvalho Chehab
8843d6c2bc0SMauro Carvalho Chehab return -ENFILE;
8853d6c2bc0SMauro Carvalho Chehab }
8863d6c2bc0SMauro Carvalho Chehab
dvb_register_adapter(struct dvb_adapter * adap,const char * name,struct module * module,struct device * device,short * adapter_nums)8873d6c2bc0SMauro Carvalho Chehab int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
8883d6c2bc0SMauro Carvalho Chehab struct module *module, struct device *device,
8893d6c2bc0SMauro Carvalho Chehab short *adapter_nums)
8903d6c2bc0SMauro Carvalho Chehab {
8913d6c2bc0SMauro Carvalho Chehab int i, num;
8923d6c2bc0SMauro Carvalho Chehab
8933d6c2bc0SMauro Carvalho Chehab mutex_lock(&dvbdev_register_lock);
8943d6c2bc0SMauro Carvalho Chehab
8953d6c2bc0SMauro Carvalho Chehab for (i = 0; i < DVB_MAX_ADAPTERS; ++i) {
8963d6c2bc0SMauro Carvalho Chehab num = adapter_nums[i];
8973d6c2bc0SMauro Carvalho Chehab if (num >= 0 && num < DVB_MAX_ADAPTERS) {
8983d6c2bc0SMauro Carvalho Chehab /* use the one the driver asked for */
8993d6c2bc0SMauro Carvalho Chehab if (dvbdev_check_free_adapter_num(num))
9003d6c2bc0SMauro Carvalho Chehab break;
9013d6c2bc0SMauro Carvalho Chehab } else {
9023d6c2bc0SMauro Carvalho Chehab num = dvbdev_get_free_adapter_num();
9033d6c2bc0SMauro Carvalho Chehab break;
9043d6c2bc0SMauro Carvalho Chehab }
9053d6c2bc0SMauro Carvalho Chehab num = -1;
9063d6c2bc0SMauro Carvalho Chehab }
9073d6c2bc0SMauro Carvalho Chehab
9083d6c2bc0SMauro Carvalho Chehab if (num < 0) {
9093d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
9103d6c2bc0SMauro Carvalho Chehab return -ENFILE;
9113d6c2bc0SMauro Carvalho Chehab }
9123d6c2bc0SMauro Carvalho Chehab
9133d6c2bc0SMauro Carvalho Chehab memset(adap, 0, sizeof(struct dvb_adapter));
9143d6c2bc0SMauro Carvalho Chehab INIT_LIST_HEAD(&adap->device_list);
9153d6c2bc0SMauro Carvalho Chehab
916b3ad24d2SMauro Carvalho Chehab pr_info("DVB: registering new adapter (%s)\n", name);
9173d6c2bc0SMauro Carvalho Chehab
9183d6c2bc0SMauro Carvalho Chehab adap->num = num;
9193d6c2bc0SMauro Carvalho Chehab adap->name = name;
9203d6c2bc0SMauro Carvalho Chehab adap->module = module;
9213d6c2bc0SMauro Carvalho Chehab adap->device = device;
9223d6c2bc0SMauro Carvalho Chehab adap->mfe_shared = 0;
9233d6c2bc0SMauro Carvalho Chehab adap->mfe_dvbdev = NULL;
9243d6c2bc0SMauro Carvalho Chehab mutex_init(&adap->mfe_lock);
9253d6c2bc0SMauro Carvalho Chehab
926f17c403aSMax Kellermann #ifdef CONFIG_MEDIA_CONTROLLER_DVB
927f17c403aSMax Kellermann mutex_init(&adap->mdev_lock);
928f17c403aSMax Kellermann #endif
929f17c403aSMax Kellermann
9303d6c2bc0SMauro Carvalho Chehab list_add_tail(&adap->list_head, &dvb_adapter_list);
9313d6c2bc0SMauro Carvalho Chehab
9323d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
9333d6c2bc0SMauro Carvalho Chehab
9343d6c2bc0SMauro Carvalho Chehab return num;
9353d6c2bc0SMauro Carvalho Chehab }
9363d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_register_adapter);
9373d6c2bc0SMauro Carvalho Chehab
dvb_unregister_adapter(struct dvb_adapter * adap)9383d6c2bc0SMauro Carvalho Chehab int dvb_unregister_adapter(struct dvb_adapter *adap)
9393d6c2bc0SMauro Carvalho Chehab {
9403d6c2bc0SMauro Carvalho Chehab mutex_lock(&dvbdev_register_lock);
9413d6c2bc0SMauro Carvalho Chehab list_del(&adap->list_head);
9423d6c2bc0SMauro Carvalho Chehab mutex_unlock(&dvbdev_register_lock);
9433d6c2bc0SMauro Carvalho Chehab return 0;
9443d6c2bc0SMauro Carvalho Chehab }
9453d6c2bc0SMauro Carvalho Chehab EXPORT_SYMBOL(dvb_unregister_adapter);
9463d6c2bc0SMauro Carvalho Chehab
947f28701ccSMauro Carvalho Chehab /*
948f28701ccSMauro Carvalho Chehab * if the miracle happens and "generic_usercopy()" is included into
949f28701ccSMauro Carvalho Chehab * the kernel, then this can vanish. please don't make the mistake and
950f28701ccSMauro Carvalho Chehab * define this as video_usercopy(). this will introduce a dependency
951f28701ccSMauro Carvalho Chehab * to the v4l "videodev.o" module, which is unnecessary for some
952f28701ccSMauro Carvalho Chehab * cards (ie. the budget dvb-cards don't need the v4l module...)
953f28701ccSMauro Carvalho Chehab */
dvb_usercopy(struct file * file,unsigned int cmd,unsigned long arg,int (* func)(struct file * file,unsigned int cmd,void * arg))9543d6c2bc0SMauro Carvalho Chehab int dvb_usercopy(struct file *file,
9553d6c2bc0SMauro Carvalho Chehab unsigned int cmd, unsigned long arg,
9563d6c2bc0SMauro Carvalho Chehab int (*func)(struct file *file,
9573d6c2bc0SMauro Carvalho Chehab unsigned int cmd, void *arg))
9583d6c2bc0SMauro Carvalho Chehab {
959*17d1316dSRicardo Ribalda char sbuf[128] = {};
9603d6c2bc0SMauro Carvalho Chehab void *mbuf = NULL;
9613d6c2bc0SMauro Carvalho Chehab void *parg = NULL;
9623d6c2bc0SMauro Carvalho Chehab int err = -EINVAL;
9633d6c2bc0SMauro Carvalho Chehab
9643d6c2bc0SMauro Carvalho Chehab /* Copy arguments into temp kernel buffer */
9653d6c2bc0SMauro Carvalho Chehab switch (_IOC_DIR(cmd)) {
9663d6c2bc0SMauro Carvalho Chehab case _IOC_NONE:
9673d6c2bc0SMauro Carvalho Chehab /*
9683d6c2bc0SMauro Carvalho Chehab * For this command, the pointer is actually an integer
9693d6c2bc0SMauro Carvalho Chehab * argument.
9703d6c2bc0SMauro Carvalho Chehab */
9713d6c2bc0SMauro Carvalho Chehab parg = (void *)arg;
9723d6c2bc0SMauro Carvalho Chehab break;
9733d6c2bc0SMauro Carvalho Chehab case _IOC_READ: /* some v4l ioctls are marked wrong ... */
9743d6c2bc0SMauro Carvalho Chehab case _IOC_WRITE:
9753d6c2bc0SMauro Carvalho Chehab case (_IOC_WRITE | _IOC_READ):
9763d6c2bc0SMauro Carvalho Chehab if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
9773d6c2bc0SMauro Carvalho Chehab parg = sbuf;
9783d6c2bc0SMauro Carvalho Chehab } else {
9793d6c2bc0SMauro Carvalho Chehab /* too big to allocate from stack */
9803d6c2bc0SMauro Carvalho Chehab mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
981f28701ccSMauro Carvalho Chehab if (!mbuf)
9823d6c2bc0SMauro Carvalho Chehab return -ENOMEM;
9833d6c2bc0SMauro Carvalho Chehab parg = mbuf;
9843d6c2bc0SMauro Carvalho Chehab }
9853d6c2bc0SMauro Carvalho Chehab
9863d6c2bc0SMauro Carvalho Chehab err = -EFAULT;
9873d6c2bc0SMauro Carvalho Chehab if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
9883d6c2bc0SMauro Carvalho Chehab goto out;
9893d6c2bc0SMauro Carvalho Chehab break;
9903d6c2bc0SMauro Carvalho Chehab }
9913d6c2bc0SMauro Carvalho Chehab
9923d6c2bc0SMauro Carvalho Chehab /* call driver */
993f28701ccSMauro Carvalho Chehab err = func(file, cmd, parg);
994f28701ccSMauro Carvalho Chehab if (err == -ENOIOCTLCMD)
995d9751fd0SWanlong Gao err = -ENOTTY;
9963d6c2bc0SMauro Carvalho Chehab
9973d6c2bc0SMauro Carvalho Chehab if (err < 0)
9983d6c2bc0SMauro Carvalho Chehab goto out;
9993d6c2bc0SMauro Carvalho Chehab
10003d6c2bc0SMauro Carvalho Chehab /* Copy results into user buffer */
1001f28701ccSMauro Carvalho Chehab switch (_IOC_DIR(cmd)) {
10023d6c2bc0SMauro Carvalho Chehab case _IOC_READ:
10033d6c2bc0SMauro Carvalho Chehab case (_IOC_WRITE | _IOC_READ):
10043d6c2bc0SMauro Carvalho Chehab if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
10053d6c2bc0SMauro Carvalho Chehab err = -EFAULT;
10063d6c2bc0SMauro Carvalho Chehab break;
10073d6c2bc0SMauro Carvalho Chehab }
10083d6c2bc0SMauro Carvalho Chehab
10093d6c2bc0SMauro Carvalho Chehab out:
10103d6c2bc0SMauro Carvalho Chehab kfree(mbuf);
10113d6c2bc0SMauro Carvalho Chehab return err;
10123d6c2bc0SMauro Carvalho Chehab }
10133d6c2bc0SMauro Carvalho Chehab
10141980bfa6SMauro Carvalho Chehab #if IS_ENABLED(CONFIG_I2C)
dvb_module_probe(const char * module_name,const char * name,struct i2c_adapter * adap,unsigned char addr,void * platform_data)10158f569c0bSMauro Carvalho Chehab struct i2c_client *dvb_module_probe(const char *module_name,
10168f569c0bSMauro Carvalho Chehab const char *name,
10178f569c0bSMauro Carvalho Chehab struct i2c_adapter *adap,
10188f569c0bSMauro Carvalho Chehab unsigned char addr,
10198f569c0bSMauro Carvalho Chehab void *platform_data)
10208f569c0bSMauro Carvalho Chehab {
10218f569c0bSMauro Carvalho Chehab struct i2c_client *client;
10228f569c0bSMauro Carvalho Chehab struct i2c_board_info *board_info;
10238f569c0bSMauro Carvalho Chehab
10248f569c0bSMauro Carvalho Chehab board_info = kzalloc(sizeof(*board_info), GFP_KERNEL);
102539adb4e7SMauro Carvalho Chehab if (!board_info)
102639adb4e7SMauro Carvalho Chehab return NULL;
10278f569c0bSMauro Carvalho Chehab
10288f569c0bSMauro Carvalho Chehab if (name)
1029c0decac1SMauro Carvalho Chehab strscpy(board_info->type, name, I2C_NAME_SIZE);
10308f569c0bSMauro Carvalho Chehab else
1031c0decac1SMauro Carvalho Chehab strscpy(board_info->type, module_name, I2C_NAME_SIZE);
10328f569c0bSMauro Carvalho Chehab
10338f569c0bSMauro Carvalho Chehab board_info->addr = addr;
10348f569c0bSMauro Carvalho Chehab board_info->platform_data = platform_data;
10358f569c0bSMauro Carvalho Chehab request_module(module_name);
1036d928440cSWolfram Sang client = i2c_new_client_device(adap, board_info);
1037d928440cSWolfram Sang if (!i2c_client_has_driver(client)) {
10388f569c0bSMauro Carvalho Chehab kfree(board_info);
10398f569c0bSMauro Carvalho Chehab return NULL;
10408f569c0bSMauro Carvalho Chehab }
10418f569c0bSMauro Carvalho Chehab
10428f569c0bSMauro Carvalho Chehab if (!try_module_get(client->dev.driver->owner)) {
10438f569c0bSMauro Carvalho Chehab i2c_unregister_device(client);
10448f569c0bSMauro Carvalho Chehab client = NULL;
10458f569c0bSMauro Carvalho Chehab }
10468f569c0bSMauro Carvalho Chehab
10478f569c0bSMauro Carvalho Chehab kfree(board_info);
10488f569c0bSMauro Carvalho Chehab return client;
10498f569c0bSMauro Carvalho Chehab }
10508f569c0bSMauro Carvalho Chehab EXPORT_SYMBOL_GPL(dvb_module_probe);
10518f569c0bSMauro Carvalho Chehab
dvb_module_release(struct i2c_client * client)10528f569c0bSMauro Carvalho Chehab void dvb_module_release(struct i2c_client *client)
10538f569c0bSMauro Carvalho Chehab {
10548f569c0bSMauro Carvalho Chehab if (!client)
10558f569c0bSMauro Carvalho Chehab return;
10568f569c0bSMauro Carvalho Chehab
10578f569c0bSMauro Carvalho Chehab module_put(client->dev.driver->owner);
10588f569c0bSMauro Carvalho Chehab i2c_unregister_device(client);
10598f569c0bSMauro Carvalho Chehab }
10608f569c0bSMauro Carvalho Chehab EXPORT_SYMBOL_GPL(dvb_module_release);
10618f569c0bSMauro Carvalho Chehab #endif
10628f569c0bSMauro Carvalho Chehab
dvb_uevent(const struct device * dev,struct kobj_uevent_env * env)106323680f0bSGreg Kroah-Hartman static int dvb_uevent(const struct device *dev, struct kobj_uevent_env *env)
10643d6c2bc0SMauro Carvalho Chehab {
106523680f0bSGreg Kroah-Hartman const struct dvb_device *dvbdev = dev_get_drvdata(dev);
10663d6c2bc0SMauro Carvalho Chehab
10673d6c2bc0SMauro Carvalho Chehab add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num);
10683d6c2bc0SMauro Carvalho Chehab add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]);
10693d6c2bc0SMauro Carvalho Chehab add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id);
10703d6c2bc0SMauro Carvalho Chehab return 0;
10713d6c2bc0SMauro Carvalho Chehab }
10723d6c2bc0SMauro Carvalho Chehab
dvb_devnode(const struct device * dev,umode_t * mode)1073ff62b8e6SGreg Kroah-Hartman static char *dvb_devnode(const struct device *dev, umode_t *mode)
10743d6c2bc0SMauro Carvalho Chehab {
1075ff62b8e6SGreg Kroah-Hartman const struct dvb_device *dvbdev = dev_get_drvdata(dev);
10763d6c2bc0SMauro Carvalho Chehab
10773d6c2bc0SMauro Carvalho Chehab return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
10783d6c2bc0SMauro Carvalho Chehab dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
10793d6c2bc0SMauro Carvalho Chehab }
10803d6c2bc0SMauro Carvalho Chehab
init_dvbdev(void)10813d6c2bc0SMauro Carvalho Chehab static int __init init_dvbdev(void)
10823d6c2bc0SMauro Carvalho Chehab {
10833d6c2bc0SMauro Carvalho Chehab int retval;
10843d6c2bc0SMauro Carvalho Chehab dev_t dev = MKDEV(DVB_MAJOR, 0);
10853d6c2bc0SMauro Carvalho Chehab
1086f28701ccSMauro Carvalho Chehab retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB");
1087f28701ccSMauro Carvalho Chehab if (retval != 0) {
1088b3ad24d2SMauro Carvalho Chehab pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
10893d6c2bc0SMauro Carvalho Chehab return retval;
10903d6c2bc0SMauro Carvalho Chehab }
10913d6c2bc0SMauro Carvalho Chehab
10923d6c2bc0SMauro Carvalho Chehab cdev_init(&dvb_device_cdev, &dvb_device_fops);
1093f28701ccSMauro Carvalho Chehab retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS);
1094f28701ccSMauro Carvalho Chehab if (retval != 0) {
1095b3ad24d2SMauro Carvalho Chehab pr_err("dvb-core: unable register character device\n");
10963d6c2bc0SMauro Carvalho Chehab goto error;
10973d6c2bc0SMauro Carvalho Chehab }
10983d6c2bc0SMauro Carvalho Chehab
10991aaba11dSGreg Kroah-Hartman dvb_class = class_create("dvb");
11003d6c2bc0SMauro Carvalho Chehab if (IS_ERR(dvb_class)) {
11013d6c2bc0SMauro Carvalho Chehab retval = PTR_ERR(dvb_class);
11023d6c2bc0SMauro Carvalho Chehab goto error;
11033d6c2bc0SMauro Carvalho Chehab }
11043d6c2bc0SMauro Carvalho Chehab dvb_class->dev_uevent = dvb_uevent;
11053d6c2bc0SMauro Carvalho Chehab dvb_class->devnode = dvb_devnode;
11063d6c2bc0SMauro Carvalho Chehab return 0;
11073d6c2bc0SMauro Carvalho Chehab
11083d6c2bc0SMauro Carvalho Chehab error:
11093d6c2bc0SMauro Carvalho Chehab cdev_del(&dvb_device_cdev);
11103d6c2bc0SMauro Carvalho Chehab unregister_chrdev_region(dev, MAX_DVB_MINORS);
11113d6c2bc0SMauro Carvalho Chehab return retval;
11123d6c2bc0SMauro Carvalho Chehab }
11133d6c2bc0SMauro Carvalho Chehab
exit_dvbdev(void)11143d6c2bc0SMauro Carvalho Chehab static void __exit exit_dvbdev(void)
11153d6c2bc0SMauro Carvalho Chehab {
1116627bb528SHyunwoo Kim struct dvbdevfops_node *node, *next;
1117627bb528SHyunwoo Kim
11183d6c2bc0SMauro Carvalho Chehab class_destroy(dvb_class);
11193d6c2bc0SMauro Carvalho Chehab cdev_del(&dvb_device_cdev);
11203d6c2bc0SMauro Carvalho Chehab unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
1121627bb528SHyunwoo Kim
1122627bb528SHyunwoo Kim list_for_each_entry_safe(node, next, &dvbdevfops_list, list_head) {
1123627bb528SHyunwoo Kim list_del(&node->list_head);
1124627bb528SHyunwoo Kim kfree(node->fops);
1125627bb528SHyunwoo Kim kfree(node);
1126627bb528SHyunwoo Kim }
11273d6c2bc0SMauro Carvalho Chehab }
11283d6c2bc0SMauro Carvalho Chehab
11293d6c2bc0SMauro Carvalho Chehab subsys_initcall(init_dvbdev);
11303d6c2bc0SMauro Carvalho Chehab module_exit(exit_dvbdev);
11313d6c2bc0SMauro Carvalho Chehab
11323d6c2bc0SMauro Carvalho Chehab MODULE_DESCRIPTION("DVB Core Driver");
11333d6c2bc0SMauro Carvalho Chehab MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
11343d6c2bc0SMauro Carvalho Chehab MODULE_LICENSE("GPL");
1135