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-rw-r--r--drivers/media/dvb-core/dvbdev.c1137
1 files changed, 1137 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
new file mode 100644
index 000000000..d352e0284
--- /dev/null
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -0,0 +1,1137 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * dvbdev.c
+ *
+ * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
+ * & Marcus Metzler <marcus@convergence.de>
+ * for convergence integrated media GmbH
+ */
+
+#define pr_fmt(fmt) "dvbdev: " fmt
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/mutex.h>
+#include <media/dvbdev.h>
+
+/* Due to enum tuner_pad_index */
+#include <media/tuner.h>
+
+static DEFINE_MUTEX(dvbdev_mutex);
+static LIST_HEAD(dvbdevfops_list);
+static int dvbdev_debug;
+
+module_param(dvbdev_debug, int, 0644);
+MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off).");
+
+#define dprintk(fmt, arg...) do { \
+ if (dvbdev_debug) \
+ printk(KERN_DEBUG pr_fmt("%s: " fmt), \
+ __func__, ##arg); \
+} while (0)
+
+static LIST_HEAD(dvb_adapter_list);
+static DEFINE_MUTEX(dvbdev_register_lock);
+
+static const char * const dnames[] = {
+ [DVB_DEVICE_VIDEO] = "video",
+ [DVB_DEVICE_AUDIO] = "audio",
+ [DVB_DEVICE_SEC] = "sec",
+ [DVB_DEVICE_FRONTEND] = "frontend",
+ [DVB_DEVICE_DEMUX] = "demux",
+ [DVB_DEVICE_DVR] = "dvr",
+ [DVB_DEVICE_CA] = "ca",
+ [DVB_DEVICE_NET] = "net",
+ [DVB_DEVICE_OSD] = "osd"
+};
+
+#ifdef CONFIG_DVB_DYNAMIC_MINORS
+#define MAX_DVB_MINORS 256
+#define DVB_MAX_IDS MAX_DVB_MINORS
+#else
+#define DVB_MAX_IDS 4
+
+static const u8 minor_type[] = {
+ [DVB_DEVICE_VIDEO] = 0,
+ [DVB_DEVICE_AUDIO] = 1,
+ [DVB_DEVICE_SEC] = 2,
+ [DVB_DEVICE_FRONTEND] = 3,
+ [DVB_DEVICE_DEMUX] = 4,
+ [DVB_DEVICE_DVR] = 5,
+ [DVB_DEVICE_CA] = 6,
+ [DVB_DEVICE_NET] = 7,
+ [DVB_DEVICE_OSD] = 8,
+};
+
+#define nums2minor(num, type, id) \
+ (((num) << 6) | ((id) << 4) | minor_type[type])
+
+#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64)
+#endif
+
+static struct class *dvb_class;
+
+static struct dvb_device *dvb_minors[MAX_DVB_MINORS];
+static DECLARE_RWSEM(minor_rwsem);
+
+static int dvb_device_open(struct inode *inode, struct file *file)
+{
+ struct dvb_device *dvbdev;
+
+ mutex_lock(&dvbdev_mutex);
+ down_read(&minor_rwsem);
+ dvbdev = dvb_minors[iminor(inode)];
+
+ if (dvbdev && dvbdev->fops) {
+ int err = 0;
+ const struct file_operations *new_fops;
+
+ new_fops = fops_get(dvbdev->fops);
+ if (!new_fops)
+ goto fail;
+ file->private_data = dvb_device_get(dvbdev);
+ replace_fops(file, new_fops);
+ if (file->f_op->open)
+ err = file->f_op->open(inode, file);
+ up_read(&minor_rwsem);
+ mutex_unlock(&dvbdev_mutex);
+ if (err)
+ dvb_device_put(dvbdev);
+ return err;
+ }
+fail:
+ up_read(&minor_rwsem);
+ mutex_unlock(&dvbdev_mutex);
+ return -ENODEV;
+}
+
+
+static const struct file_operations dvb_device_fops =
+{
+ .owner = THIS_MODULE,
+ .open = dvb_device_open,
+ .llseek = noop_llseek,
+};
+
+static struct cdev dvb_device_cdev;
+
+int dvb_generic_open(struct inode *inode, struct file *file)
+{
+ struct dvb_device *dvbdev = file->private_data;
+
+ if (!dvbdev)
+ return -ENODEV;
+
+ if (!dvbdev->users)
+ return -EBUSY;
+
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
+ if (!dvbdev->readers)
+ return -EBUSY;
+ dvbdev->readers--;
+ } else {
+ if (!dvbdev->writers)
+ return -EBUSY;
+ dvbdev->writers--;
+ }
+
+ dvbdev->users--;
+ return 0;
+}
+EXPORT_SYMBOL(dvb_generic_open);
+
+
+int dvb_generic_release(struct inode *inode, struct file *file)
+{
+ struct dvb_device *dvbdev = file->private_data;
+
+ if (!dvbdev)
+ return -ENODEV;
+
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
+ dvbdev->readers++;
+ } else {
+ dvbdev->writers++;
+ }
+
+ dvbdev->users++;
+
+ dvb_device_put(dvbdev);
+
+ return 0;
+}
+EXPORT_SYMBOL(dvb_generic_release);
+
+
+long dvb_generic_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct dvb_device *dvbdev = file->private_data;
+
+ if (!dvbdev)
+ return -ENODEV;
+
+ if (!dvbdev->kernel_ioctl)
+ return -EINVAL;
+
+ return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl);
+}
+EXPORT_SYMBOL(dvb_generic_ioctl);
+
+
+static int dvbdev_get_free_id (struct dvb_adapter *adap, int type)
+{
+ u32 id = 0;
+
+ while (id < DVB_MAX_IDS) {
+ struct dvb_device *dev;
+ list_for_each_entry(dev, &adap->device_list, list_head)
+ if (dev->type == type && dev->id == id)
+ goto skip;
+ return id;
+skip:
+ id++;
+ }
+ return -ENFILE;
+}
+
+static void dvb_media_device_free(struct dvb_device *dvbdev)
+{
+#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
+ if (dvbdev->entity) {
+ media_device_unregister_entity(dvbdev->entity);
+ kfree(dvbdev->entity);
+ kfree(dvbdev->pads);
+ dvbdev->entity = NULL;
+ dvbdev->pads = NULL;
+ }
+
+ if (dvbdev->tsout_entity) {
+ int i;
+
+ for (i = 0; i < dvbdev->tsout_num_entities; i++) {
+ media_device_unregister_entity(&dvbdev->tsout_entity[i]);
+ kfree(dvbdev->tsout_entity[i].name);
+ }
+ kfree(dvbdev->tsout_entity);
+ kfree(dvbdev->tsout_pads);
+ dvbdev->tsout_entity = NULL;
+ dvbdev->tsout_pads = NULL;
+
+ dvbdev->tsout_num_entities = 0;
+ }
+
+ if (dvbdev->intf_devnode) {
+ media_devnode_remove(dvbdev->intf_devnode);
+ dvbdev->intf_devnode = NULL;
+ }
+
+ if (dvbdev->adapter->conn) {
+ media_device_unregister_entity(dvbdev->adapter->conn);
+ kfree(dvbdev->adapter->conn);
+ dvbdev->adapter->conn = NULL;
+ kfree(dvbdev->adapter->conn_pads);
+ dvbdev->adapter->conn_pads = NULL;
+ }
+#endif
+}
+
+#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
+static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
+ const char *name, int npads)
+{
+ int i, ret = 0;
+
+ dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads),
+ GFP_KERNEL);
+ if (!dvbdev->tsout_pads)
+ return -ENOMEM;
+
+ dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity),
+ GFP_KERNEL);
+ if (!dvbdev->tsout_entity)
+ return -ENOMEM;
+
+ dvbdev->tsout_num_entities = npads;
+
+ for (i = 0; i < npads; i++) {
+ struct media_pad *pads = &dvbdev->tsout_pads[i];
+ struct media_entity *entity = &dvbdev->tsout_entity[i];
+
+ entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i);
+ if (!entity->name)
+ return -ENOMEM;
+
+ entity->function = MEDIA_ENT_F_IO_DTV;
+ pads->flags = MEDIA_PAD_FL_SINK;
+
+ ret = media_entity_pads_init(entity, 1, pads);
+ if (ret < 0)
+ return ret;
+
+ ret = media_device_register_entity(dvbdev->adapter->mdev,
+ entity);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+#define DEMUX_TSOUT "demux-tsout"
+#define DVR_TSOUT "dvr-tsout"
+
+static int dvb_create_media_entity(struct dvb_device *dvbdev,
+ int type, int demux_sink_pads)
+{
+ int i, ret, npads;
+
+ switch (type) {
+ case DVB_DEVICE_FRONTEND:
+ npads = 2;
+ break;
+ case DVB_DEVICE_DVR:
+ ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT,
+ demux_sink_pads);
+ return ret;
+ case DVB_DEVICE_DEMUX:
+ npads = 1 + demux_sink_pads;
+ ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT,
+ demux_sink_pads);
+ if (ret < 0)
+ return ret;
+ break;
+ case DVB_DEVICE_CA:
+ npads = 2;
+ break;
+ case DVB_DEVICE_NET:
+ /*
+ * We should be creating entities for the MPE/ULE
+ * decapsulation hardware (or software implementation).
+ *
+ * However, the number of for the MPE/ULE decaps may not be
+ * fixed. As we don't have yet dynamic support for PADs at
+ * the Media Controller, let's not create the decap
+ * entities yet.
+ */
+ return 0;
+ default:
+ return 0;
+ }
+
+ dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL);
+ if (!dvbdev->entity)
+ return -ENOMEM;
+
+ dvbdev->entity->name = dvbdev->name;
+
+ if (npads) {
+ dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads),
+ GFP_KERNEL);
+ if (!dvbdev->pads) {
+ kfree(dvbdev->entity);
+ dvbdev->entity = NULL;
+ return -ENOMEM;
+ }
+ }
+
+ switch (type) {
+ case DVB_DEVICE_FRONTEND:
+ dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD;
+ dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
+ dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+ break;
+ case DVB_DEVICE_DEMUX:
+ dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX;
+ dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
+ for (i = 1; i < npads; i++)
+ dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE;
+ break;
+ case DVB_DEVICE_CA:
+ dvbdev->entity->function = MEDIA_ENT_F_DTV_CA;
+ dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
+ dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+ break;
+ default:
+ /* Should never happen, as the first switch prevents it */
+ kfree(dvbdev->entity);
+ kfree(dvbdev->pads);
+ dvbdev->entity = NULL;
+ dvbdev->pads = NULL;
+ return 0;
+ }
+
+ if (npads) {
+ ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads);
+ if (ret)
+ return ret;
+ }
+ ret = media_device_register_entity(dvbdev->adapter->mdev,
+ dvbdev->entity);
+ if (ret)
+ return ret;
+
+ pr_info("%s: media entity '%s' registered.\n",
+ __func__, dvbdev->entity->name);
+
+ return 0;
+}
+#endif
+
+static int dvb_register_media_device(struct dvb_device *dvbdev,
+ int type, int minor,
+ unsigned demux_sink_pads)
+{
+#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
+ struct media_link *link;
+ u32 intf_type;
+ int ret;
+
+ if (!dvbdev->adapter->mdev)
+ return 0;
+
+ ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads);
+ if (ret)
+ return ret;
+
+ switch (type) {
+ case DVB_DEVICE_FRONTEND:
+ intf_type = MEDIA_INTF_T_DVB_FE;
+ break;
+ case DVB_DEVICE_DEMUX:
+ intf_type = MEDIA_INTF_T_DVB_DEMUX;
+ break;
+ case DVB_DEVICE_DVR:
+ intf_type = MEDIA_INTF_T_DVB_DVR;
+ break;
+ case DVB_DEVICE_CA:
+ intf_type = MEDIA_INTF_T_DVB_CA;
+ break;
+ case DVB_DEVICE_NET:
+ intf_type = MEDIA_INTF_T_DVB_NET;
+ break;
+ default:
+ return 0;
+ }
+
+ dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev,
+ intf_type, 0,
+ DVB_MAJOR, minor);
+
+ if (!dvbdev->intf_devnode)
+ return -ENOMEM;
+
+ /*
+ * Create the "obvious" link, e. g. the ones that represent
+ * a direct association between an interface and an entity.
+ * Other links should be created elsewhere, like:
+ * DVB FE intf -> tuner
+ * DVB demux intf -> dvr
+ */
+
+ if (!dvbdev->entity)
+ return 0;
+
+ link = media_create_intf_link(dvbdev->entity,
+ &dvbdev->intf_devnode->intf,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (!link)
+ return -ENOMEM;
+#endif
+ return 0;
+}
+
+int 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)
+{
+ struct dvb_device *dvbdev;
+ struct file_operations *dvbdevfops = NULL;
+ struct dvbdevfops_node *node = NULL, *new_node = NULL;
+ struct device *clsdev;
+ int minor;
+ int id, ret;
+
+ mutex_lock(&dvbdev_register_lock);
+
+ if ((id = dvbdev_get_free_id (adap, type)) < 0) {
+ mutex_unlock(&dvbdev_register_lock);
+ *pdvbdev = NULL;
+ pr_err("%s: couldn't find free device id\n", __func__);
+ return -ENFILE;
+ }
+
+ *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL);
+ if (!dvbdev){
+ mutex_unlock(&dvbdev_register_lock);
+ return -ENOMEM;
+ }
+
+ /*
+ * When a device of the same type is probe()d more than once,
+ * the first allocated fops are used. This prevents memory leaks
+ * that can occur when the same device is probe()d repeatedly.
+ */
+ list_for_each_entry(node, &dvbdevfops_list, list_head) {
+ if (node->fops->owner == adap->module &&
+ node->type == type &&
+ node->template == template) {
+ dvbdevfops = node->fops;
+ break;
+ }
+ }
+
+ if (dvbdevfops == NULL) {
+ dvbdevfops = kmemdup(template->fops, sizeof(*dvbdevfops), GFP_KERNEL);
+ if (!dvbdevfops) {
+ kfree(dvbdev);
+ mutex_unlock(&dvbdev_register_lock);
+ return -ENOMEM;
+ }
+
+ new_node = kzalloc(sizeof(struct dvbdevfops_node), GFP_KERNEL);
+ if (!new_node) {
+ kfree(dvbdevfops);
+ kfree(dvbdev);
+ mutex_unlock(&dvbdev_register_lock);
+ return -ENOMEM;
+ }
+
+ new_node->fops = dvbdevfops;
+ new_node->type = type;
+ new_node->template = template;
+ list_add_tail (&new_node->list_head, &dvbdevfops_list);
+ }
+
+ memcpy(dvbdev, template, sizeof(struct dvb_device));
+ kref_init(&dvbdev->ref);
+ dvbdev->type = type;
+ dvbdev->id = id;
+ dvbdev->adapter = adap;
+ dvbdev->priv = priv;
+ dvbdev->fops = dvbdevfops;
+ init_waitqueue_head (&dvbdev->wait_queue);
+ dvbdevfops->owner = adap->module;
+ list_add_tail (&dvbdev->list_head, &adap->device_list);
+ down_write(&minor_rwsem);
+#ifdef CONFIG_DVB_DYNAMIC_MINORS
+ for (minor = 0; minor < MAX_DVB_MINORS; minor++)
+ if (dvb_minors[minor] == NULL)
+ break;
+ if (minor == MAX_DVB_MINORS) {
+ if (new_node) {
+ list_del (&new_node->list_head);
+ kfree(dvbdevfops);
+ kfree(new_node);
+ }
+ list_del (&dvbdev->list_head);
+ kfree(dvbdev);
+ up_write(&minor_rwsem);
+ mutex_unlock(&dvbdev_register_lock);
+ return -EINVAL;
+ }
+#else
+ minor = nums2minor(adap->num, type, id);
+#endif
+ dvbdev->minor = minor;
+ dvb_minors[minor] = dvb_device_get(dvbdev);
+ up_write(&minor_rwsem);
+ ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads);
+ if (ret) {
+ pr_err("%s: dvb_register_media_device failed to create the mediagraph\n",
+ __func__);
+ if (new_node) {
+ list_del (&new_node->list_head);
+ kfree(dvbdevfops);
+ kfree(new_node);
+ }
+ dvb_media_device_free(dvbdev);
+ list_del (&dvbdev->list_head);
+ kfree(dvbdev);
+ mutex_unlock(&dvbdev_register_lock);
+ return ret;
+ }
+
+ clsdev = device_create(dvb_class, adap->device,
+ MKDEV(DVB_MAJOR, minor),
+ dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id);
+ if (IS_ERR(clsdev)) {
+ pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
+ __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
+ if (new_node) {
+ list_del (&new_node->list_head);
+ kfree(dvbdevfops);
+ kfree(new_node);
+ }
+ dvb_media_device_free(dvbdev);
+ list_del (&dvbdev->list_head);
+ kfree(dvbdev);
+ mutex_unlock(&dvbdev_register_lock);
+ return PTR_ERR(clsdev);
+ }
+
+ dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
+ adap->num, dnames[type], id, minor, minor);
+
+ mutex_unlock(&dvbdev_register_lock);
+ return 0;
+}
+EXPORT_SYMBOL(dvb_register_device);
+
+
+void dvb_remove_device(struct dvb_device *dvbdev)
+{
+ if (!dvbdev)
+ return;
+
+ down_write(&minor_rwsem);
+ dvb_minors[dvbdev->minor] = NULL;
+ dvb_device_put(dvbdev);
+ up_write(&minor_rwsem);
+
+ dvb_media_device_free(dvbdev);
+
+ device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));
+
+ list_del (&dvbdev->list_head);
+}
+EXPORT_SYMBOL(dvb_remove_device);
+
+
+static void dvb_free_device(struct kref *ref)
+{
+ struct dvb_device *dvbdev = container_of(ref, struct dvb_device, ref);
+
+ kfree (dvbdev);
+}
+
+
+struct dvb_device *dvb_device_get(struct dvb_device *dvbdev)
+{
+ kref_get(&dvbdev->ref);
+ return dvbdev;
+}
+EXPORT_SYMBOL(dvb_device_get);
+
+
+void dvb_device_put(struct dvb_device *dvbdev)
+{
+ if (dvbdev)
+ kref_put(&dvbdev->ref, dvb_free_device);
+}
+
+
+void dvb_unregister_device(struct dvb_device *dvbdev)
+{
+ dvb_remove_device(dvbdev);
+ dvb_device_put(dvbdev);
+}
+EXPORT_SYMBOL(dvb_unregister_device);
+
+
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+
+static int dvb_create_io_intf_links(struct dvb_adapter *adap,
+ struct media_interface *intf,
+ char *name)
+{
+ struct media_device *mdev = adap->mdev;
+ struct media_entity *entity;
+ struct media_link *link;
+
+ media_device_for_each_entity(entity, mdev) {
+ if (entity->function == MEDIA_ENT_F_IO_DTV) {
+ if (strncmp(entity->name, name, strlen(name)))
+ continue;
+ link = media_create_intf_link(entity, intf,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (!link)
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
+int dvb_create_media_graph(struct dvb_adapter *adap,
+ bool create_rf_connector)
+{
+ struct media_device *mdev = adap->mdev;
+ struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn;
+ struct media_entity *demux = NULL, *ca = NULL;
+ struct media_link *link;
+ struct media_interface *intf;
+ unsigned demux_pad = 0;
+ unsigned dvr_pad = 0;
+ unsigned ntuner = 0, ndemod = 0;
+ int ret, pad_source, pad_sink;
+ static const char *connector_name = "Television";
+
+ if (!mdev)
+ return 0;
+
+ media_device_for_each_entity(entity, mdev) {
+ switch (entity->function) {
+ case MEDIA_ENT_F_TUNER:
+ tuner = entity;
+ ntuner++;
+ break;
+ case MEDIA_ENT_F_DTV_DEMOD:
+ demod = entity;
+ ndemod++;
+ break;
+ case MEDIA_ENT_F_TS_DEMUX:
+ demux = entity;
+ break;
+ case MEDIA_ENT_F_DTV_CA:
+ ca = entity;
+ break;
+ }
+ }
+
+ /*
+ * Prepare to signalize to media_create_pad_links() that multiple
+ * entities of the same type exists and a 1:n or n:1 links need to be
+ * created.
+ * NOTE: if both tuner and demod have multiple instances, it is up
+ * to the caller driver to create such links.
+ */
+ if (ntuner > 1)
+ tuner = NULL;
+ if (ndemod > 1)
+ demod = NULL;
+
+ if (create_rf_connector) {
+ conn = kzalloc(sizeof(*conn), GFP_KERNEL);
+ if (!conn)
+ return -ENOMEM;
+ adap->conn = conn;
+
+ adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL);
+ if (!adap->conn_pads)
+ return -ENOMEM;
+
+ conn->flags = MEDIA_ENT_FL_CONNECTOR;
+ conn->function = MEDIA_ENT_F_CONN_RF;
+ conn->name = connector_name;
+ adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_pads_init(conn, 1, adap->conn_pads);
+ if (ret)
+ return ret;
+
+ ret = media_device_register_entity(mdev, conn);
+ if (ret)
+ return ret;
+
+ if (!ntuner) {
+ ret = media_create_pad_links(mdev,
+ MEDIA_ENT_F_CONN_RF,
+ conn, 0,
+ MEDIA_ENT_F_DTV_DEMOD,
+ demod, 0,
+ MEDIA_LNK_FL_ENABLED,
+ false);
+ } else {
+ pad_sink = media_get_pad_index(tuner, true,
+ PAD_SIGNAL_ANALOG);
+ if (pad_sink < 0)
+ return -EINVAL;
+ ret = media_create_pad_links(mdev,
+ MEDIA_ENT_F_CONN_RF,
+ conn, 0,
+ MEDIA_ENT_F_TUNER,
+ tuner, pad_sink,
+ MEDIA_LNK_FL_ENABLED,
+ false);
+ }
+ if (ret)
+ return ret;
+ }
+
+ if (ntuner && ndemod) {
+ /* NOTE: first found tuner source pad presumed correct */
+ pad_source = media_get_pad_index(tuner, false,
+ PAD_SIGNAL_ANALOG);
+ if (pad_source < 0)
+ return -EINVAL;
+ ret = media_create_pad_links(mdev,
+ MEDIA_ENT_F_TUNER,
+ tuner, pad_source,
+ MEDIA_ENT_F_DTV_DEMOD,
+ demod, 0, MEDIA_LNK_FL_ENABLED,
+ false);
+ if (ret)
+ return ret;
+ }
+
+ if (ndemod && demux) {
+ ret = media_create_pad_links(mdev,
+ MEDIA_ENT_F_DTV_DEMOD,
+ demod, 1,
+ MEDIA_ENT_F_TS_DEMUX,
+ demux, 0, MEDIA_LNK_FL_ENABLED,
+ false);
+ if (ret)
+ return ret;
+ }
+ if (demux && ca) {
+ ret = media_create_pad_link(demux, 1, ca,
+ 0, MEDIA_LNK_FL_ENABLED);
+ if (ret)
+ return ret;
+ }
+
+ /* Create demux links for each ringbuffer/pad */
+ if (demux) {
+ media_device_for_each_entity(entity, mdev) {
+ if (entity->function == MEDIA_ENT_F_IO_DTV) {
+ if (!strncmp(entity->name, DVR_TSOUT,
+ strlen(DVR_TSOUT))) {
+ ret = media_create_pad_link(demux,
+ ++dvr_pad,
+ entity, 0, 0);
+ if (ret)
+ return ret;
+ }
+ if (!strncmp(entity->name, DEMUX_TSOUT,
+ strlen(DEMUX_TSOUT))) {
+ ret = media_create_pad_link(demux,
+ ++demux_pad,
+ entity, 0, 0);
+ if (ret)
+ return ret;
+ }
+ }
+ }
+ }
+
+ /* Create interface links for FE->tuner, DVR->demux and CA->ca */
+ media_device_for_each_intf(intf, mdev) {
+ if (intf->type == MEDIA_INTF_T_DVB_CA && ca) {
+ link = media_create_intf_link(ca, intf,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (!link)
+ return -ENOMEM;
+ }
+
+ if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) {
+ link = media_create_intf_link(tuner, intf,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (!link)
+ return -ENOMEM;
+ }
+#if 0
+ /*
+ * Indirect link - let's not create yet, as we don't know how
+ * to handle indirect links, nor if this will
+ * actually be needed.
+ */
+ if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) {
+ link = media_create_intf_link(demux, intf,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (!link)
+ return -ENOMEM;
+ }
+#endif
+ if (intf->type == MEDIA_INTF_T_DVB_DVR) {
+ ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT);
+ if (ret)
+ return ret;
+ }
+ if (intf->type == MEDIA_INTF_T_DVB_DEMUX) {
+ ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dvb_create_media_graph);
+#endif
+
+static int dvbdev_check_free_adapter_num(int num)
+{
+ struct list_head *entry;
+ list_for_each(entry, &dvb_adapter_list) {
+ struct dvb_adapter *adap;
+ adap = list_entry(entry, struct dvb_adapter, list_head);
+ if (adap->num == num)
+ return 0;
+ }
+ return 1;
+}
+
+static int dvbdev_get_free_adapter_num (void)
+{
+ int num = 0;
+
+ while (num < DVB_MAX_ADAPTERS) {
+ if (dvbdev_check_free_adapter_num(num))
+ return num;
+ num++;
+ }
+
+ return -ENFILE;
+}
+
+
+int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
+ struct module *module, struct device *device,
+ short *adapter_nums)
+{
+ int i, num;
+
+ mutex_lock(&dvbdev_register_lock);
+
+ for (i = 0; i < DVB_MAX_ADAPTERS; ++i) {
+ num = adapter_nums[i];
+ if (num >= 0 && num < DVB_MAX_ADAPTERS) {
+ /* use the one the driver asked for */
+ if (dvbdev_check_free_adapter_num(num))
+ break;
+ } else {
+ num = dvbdev_get_free_adapter_num();
+ break;
+ }
+ num = -1;
+ }
+
+ if (num < 0) {
+ mutex_unlock(&dvbdev_register_lock);
+ return -ENFILE;
+ }
+
+ memset (adap, 0, sizeof(struct dvb_adapter));
+ INIT_LIST_HEAD (&adap->device_list);
+
+ pr_info("DVB: registering new adapter (%s)\n", name);
+
+ adap->num = num;
+ adap->name = name;
+ adap->module = module;
+ adap->device = device;
+ adap->mfe_shared = 0;
+ adap->mfe_dvbdev = NULL;
+ mutex_init (&adap->mfe_lock);
+
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+ mutex_init(&adap->mdev_lock);
+#endif
+
+ list_add_tail (&adap->list_head, &dvb_adapter_list);
+
+ mutex_unlock(&dvbdev_register_lock);
+
+ return num;
+}
+EXPORT_SYMBOL(dvb_register_adapter);
+
+
+int dvb_unregister_adapter(struct dvb_adapter *adap)
+{
+ mutex_lock(&dvbdev_register_lock);
+ list_del (&adap->list_head);
+ mutex_unlock(&dvbdev_register_lock);
+ return 0;
+}
+EXPORT_SYMBOL(dvb_unregister_adapter);
+
+/* if the miracle happens and "generic_usercopy()" is included into
+ the kernel, then this can vanish. please don't make the mistake and
+ define this as video_usercopy(). this will introduce a dependency
+ to the v4l "videodev.o" module, which is unnecessary for some
+ cards (ie. the budget dvb-cards don't need the v4l module...) */
+int dvb_usercopy(struct file *file,
+ unsigned int cmd, unsigned long arg,
+ int (*func)(struct file *file,
+ unsigned int cmd, void *arg))
+{
+ char sbuf[128];
+ void *mbuf = NULL;
+ void *parg = NULL;
+ int err = -EINVAL;
+
+ /* Copy arguments into temp kernel buffer */
+ switch (_IOC_DIR(cmd)) {
+ case _IOC_NONE:
+ /*
+ * For this command, the pointer is actually an integer
+ * argument.
+ */
+ parg = (void *) arg;
+ break;
+ case _IOC_READ: /* some v4l ioctls are marked wrong ... */
+ case _IOC_WRITE:
+ case (_IOC_WRITE | _IOC_READ):
+ if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
+ parg = sbuf;
+ } else {
+ /* too big to allocate from stack */
+ mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
+ if (NULL == mbuf)
+ return -ENOMEM;
+ parg = mbuf;
+ }
+
+ err = -EFAULT;
+ if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
+ goto out;
+ break;
+ }
+
+ /* call driver */
+ if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD)
+ err = -ENOTTY;
+
+ if (err < 0)
+ goto out;
+
+ /* Copy results into user buffer */
+ switch (_IOC_DIR(cmd))
+ {
+ case _IOC_READ:
+ case (_IOC_WRITE | _IOC_READ):
+ if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
+ err = -EFAULT;
+ break;
+ }
+
+out:
+ kfree(mbuf);
+ return err;
+}
+
+#if IS_ENABLED(CONFIG_I2C)
+struct i2c_client *dvb_module_probe(const char *module_name,
+ const char *name,
+ struct i2c_adapter *adap,
+ unsigned char addr,
+ void *platform_data)
+{
+ struct i2c_client *client;
+ struct i2c_board_info *board_info;
+
+ board_info = kzalloc(sizeof(*board_info), GFP_KERNEL);
+ if (!board_info)
+ return NULL;
+
+ if (name)
+ strscpy(board_info->type, name, I2C_NAME_SIZE);
+ else
+ strscpy(board_info->type, module_name, I2C_NAME_SIZE);
+
+ board_info->addr = addr;
+ board_info->platform_data = platform_data;
+ request_module(module_name);
+ client = i2c_new_client_device(adap, board_info);
+ if (!i2c_client_has_driver(client)) {
+ kfree(board_info);
+ return NULL;
+ }
+
+ if (!try_module_get(client->dev.driver->owner)) {
+ i2c_unregister_device(client);
+ client = NULL;
+ }
+
+ kfree(board_info);
+ return client;
+}
+EXPORT_SYMBOL_GPL(dvb_module_probe);
+
+void dvb_module_release(struct i2c_client *client)
+{
+ if (!client)
+ return;
+
+ module_put(client->dev.driver->owner);
+ i2c_unregister_device(client);
+}
+EXPORT_SYMBOL_GPL(dvb_module_release);
+#endif
+
+static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct dvb_device *dvbdev = dev_get_drvdata(dev);
+
+ add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num);
+ add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]);
+ add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id);
+ return 0;
+}
+
+static char *dvb_devnode(struct device *dev, umode_t *mode)
+{
+ struct dvb_device *dvbdev = dev_get_drvdata(dev);
+
+ return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
+ dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
+}
+
+
+static int __init init_dvbdev(void)
+{
+ int retval;
+ dev_t dev = MKDEV(DVB_MAJOR, 0);
+
+ if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) {
+ pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
+ return retval;
+ }
+
+ cdev_init(&dvb_device_cdev, &dvb_device_fops);
+ if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) {
+ pr_err("dvb-core: unable register character device\n");
+ goto error;
+ }
+
+ dvb_class = class_create(THIS_MODULE, "dvb");
+ if (IS_ERR(dvb_class)) {
+ retval = PTR_ERR(dvb_class);
+ goto error;
+ }
+ dvb_class->dev_uevent = dvb_uevent;
+ dvb_class->devnode = dvb_devnode;
+ return 0;
+
+error:
+ cdev_del(&dvb_device_cdev);
+ unregister_chrdev_region(dev, MAX_DVB_MINORS);
+ return retval;
+}
+
+
+static void __exit exit_dvbdev(void)
+{
+ struct dvbdevfops_node *node, *next;
+
+ class_destroy(dvb_class);
+ cdev_del(&dvb_device_cdev);
+ unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
+
+ list_for_each_entry_safe(node, next, &dvbdevfops_list, list_head) {
+ list_del (&node->list_head);
+ kfree(node->fops);
+ kfree(node);
+ }
+}
+
+subsys_initcall(init_dvbdev);
+module_exit(exit_dvbdev);
+
+MODULE_DESCRIPTION("DVB Core Driver");
+MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
+MODULE_LICENSE("GPL");