-/*
+/*
* dvbdev.c
*
* Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.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 "dvbdev.h"
-#include "dvb_functions.h"
-static int dvbdev_debug = 0;
+static int dvbdev_debug;
+
+module_param(dvbdev_debug, int, 0644);
+MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off).");
+
#define dprintk if (dvbdev_debug) printk
static LIST_HEAD(dvb_adapter_list);
-static DECLARE_MUTEX(dvbdev_register_lock);
+static DEFINE_MUTEX(dvbdev_register_lock);
-
-static char *dnames[] = {
- "video", "audio", "sec", "frontend", "demux", "dvr", "ca",
+static const char * const dnames[] = {
+ "video", "audio", "sec", "frontend", "demux", "dvr", "ca",
"net", "osd"
};
+#define DVB_MAX_ADAPTERS 8
+#define DVB_MAX_IDS 4
+#define nums2minor(num,type,id) ((num << 6) | (id << 4) | type)
+#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64)
-#define DVB_MAX_IDS 4
-#define nums2minor(num,type,id) ((num << 6) | (id << 4) | type)
+static struct class *dvb_class;
static struct dvb_device* dvbdev_find_device (int minor)
{
static int dvb_device_open(struct inode *inode, struct file *file)
{
struct dvb_device *dvbdev;
-
+
dvbdev = dvbdev_find_device (iminor(inode));
if (dvbdev && dvbdev->fops) {
int err = 0;
- struct file_operations *old_fops;
+ const struct file_operations *old_fops;
file->private_data = dvbdev;
old_fops = file->f_op;
- file->f_op = fops_get(dvbdev->fops);
- if(file->f_op->open)
- err = file->f_op->open(inode,file);
- if (err) {
- fops_put(file->f_op);
- file->f_op = fops_get(old_fops);
- }
- fops_put(old_fops);
- return err;
+ file->f_op = fops_get(dvbdev->fops);
+ if(file->f_op->open)
+ err = file->f_op->open(inode,file);
+ if (err) {
+ fops_put(file->f_op);
+ file->f_op = fops_get(old_fops);
+ }
+ fops_put(old_fops);
+ return err;
}
return -ENODEV;
}
.open = dvb_device_open,
};
+static struct cdev dvb_device_cdev = {
+ .kobj = {.name = "dvb", },
+ .owner = THIS_MODULE,
+};
int dvb_generic_open(struct inode *inode, struct file *file)
{
- struct dvb_device *dvbdev = file->private_data;
+ struct dvb_device *dvbdev = file->private_data;
- if (!dvbdev)
- return -ENODEV;
+ if (!dvbdev)
+ return -ENODEV;
if (!dvbdev->users)
- return -EBUSY;
+ return -EBUSY;
if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
- if (!dvbdev->readers)
- return -EBUSY;
+ if (!dvbdev->readers)
+ return -EBUSY;
dvbdev->readers--;
} else {
- if (!dvbdev->writers)
- return -EBUSY;
+ 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;
+ struct dvb_device *dvbdev = file->private_data;
if (!dvbdev)
- return -ENODEV;
+ return -ENODEV;
if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
dvbdev->readers++;
dvbdev->users++;
return 0;
}
+EXPORT_SYMBOL(dvb_generic_release);
int dvb_generic_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct dvb_device *dvbdev = file->private_data;
-
- if (!dvbdev)
- return -ENODEV;
+ struct dvb_device *dvbdev = file->private_data;
+
+ if (!dvbdev)
+ return -ENODEV;
if (!dvbdev->kernel_ioctl)
return -EINVAL;
return dvb_usercopy (inode, file, cmd, arg, dvbdev->kernel_ioctl);
}
+EXPORT_SYMBOL(dvb_generic_ioctl);
static int dvbdev_get_free_id (struct dvb_adapter *adap, int type)
}
-int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
+int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
const struct dvb_device *template, void *priv, int type)
{
struct dvb_device *dvbdev;
+ struct file_operations *dvbdevfops;
+
int id;
- if (down_interruptible (&dvbdev_register_lock))
- return -ERESTARTSYS;
+ mutex_lock(&dvbdev_register_lock);
if ((id = dvbdev_get_free_id (adap, type)) < 0) {
- up (&dvbdev_register_lock);
+ mutex_unlock(&dvbdev_register_lock);
*pdvbdev = NULL;
printk ("%s: could get find free device id...\n", __FUNCTION__);
return -ENFILE;
*pdvbdev = dvbdev = kmalloc(sizeof(struct dvb_device), GFP_KERNEL);
if (!dvbdev) {
- up(&dvbdev_register_lock);
+ mutex_unlock(&dvbdev_register_lock);
+ return -ENOMEM;
+ }
+
+ dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL);
+
+ if (!dvbdevfops) {
+ kfree (dvbdev);
+ mutex_unlock(&dvbdev_register_lock);
return -ENOMEM;
}
- up (&dvbdev_register_lock);
-
memcpy(dvbdev, template, sizeof(struct dvb_device));
dvbdev->type = type;
dvbdev->id = id;
dvbdev->adapter = adap;
dvbdev->priv = priv;
+ dvbdev->fops = dvbdevfops;
+ memcpy(dvbdev->fops, template->fops, sizeof(struct file_operations));
dvbdev->fops->owner = adap->module;
list_add_tail (&dvbdev->list_head, &adap->device_list);
- devfs_mk_cdev(MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
- S_IFCHR | S_IRUSR | S_IWUSR,
- "dvb/adapter%d/%s%d", adap->num, dnames[type], id);
+ mutex_unlock(&dvbdev_register_lock);
+
+ class_device_create(dvb_class, NULL, MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
+ adap->device, "dvb%d.%s%d", adap->num, dnames[type], id);
dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
adap->num, dnames[type], id, nums2minor(adap->num, type, id),
return 0;
}
+EXPORT_SYMBOL(dvb_register_device);
void dvb_unregister_device(struct dvb_device *dvbdev)
if (!dvbdev)
return;
- devfs_remove("dvb/adapter%d/%s%d", dvbdev->adapter->num,
- dnames[dvbdev->type], dvbdev->id);
+ class_device_destroy(dvb_class, MKDEV(DVB_MAJOR, nums2minor(dvbdev->adapter->num,
+ dvbdev->type, dvbdev->id)));
- list_del(&dvbdev->list_head);
- kfree(dvbdev);
- }
+ list_del (&dvbdev->list_head);
+ kfree (dvbdev->fops);
+ kfree (dvbdev);
+}
+EXPORT_SYMBOL(dvb_unregister_device);
static int dvbdev_get_free_adapter_num (void)
{
int num = 0;
- while (1) {
+ while (num < DVB_MAX_ADAPTERS) {
struct list_head *entry;
list_for_each (entry, &dvb_adapter_list) {
struct dvb_adapter *adap;
}
-int dvb_register_adapter(struct dvb_adapter **padap, const char *name, struct module *module)
+int dvb_register_adapter(struct dvb_adapter *adap, const char *name, struct module *module, struct device *device)
{
- struct dvb_adapter *adap;
int num;
- if (down_interruptible (&dvbdev_register_lock))
- return -ERESTARTSYS;
+ mutex_lock(&dvbdev_register_lock);
if ((num = dvbdev_get_free_adapter_num ()) < 0) {
- up (&dvbdev_register_lock);
+ mutex_unlock(&dvbdev_register_lock);
return -ENFILE;
}
- if (!(*padap = adap = kmalloc(sizeof(struct dvb_adapter), GFP_KERNEL))) {
- up(&dvbdev_register_lock);
- return -ENOMEM;
- }
-
memset (adap, 0, sizeof(struct dvb_adapter));
INIT_LIST_HEAD (&adap->device_list);
printk ("DVB: registering new adapter (%s).\n", name);
-
- devfs_mk_dir("dvb/adapter%d", num);
adap->num = num;
adap->name = name;
adap->module = module;
+ adap->device = device;
list_add_tail (&adap->list_head, &dvb_adapter_list);
- up (&dvbdev_register_lock);
+ mutex_unlock(&dvbdev_register_lock);
return num;
}
+EXPORT_SYMBOL(dvb_register_adapter);
int dvb_unregister_adapter(struct dvb_adapter *adap)
{
- if (down_interruptible (&dvbdev_register_lock))
- return -ERESTARTSYS;
- devfs_remove("dvb/adapter%d", adap->num);
+ mutex_lock(&dvbdev_register_lock);
list_del (&adap->list_head);
- up (&dvbdev_register_lock);
- kfree (adap);
+ 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 dependecy
+ 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 inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg,
+ int (*func)(struct inode *inode, 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(inode, file, cmd, parg)) == -ENOIOCTLCMD)
+ err = -EINVAL;
+
+ 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;
+}
static int __init init_dvbdev(void)
{
int retval;
- devfs_mk_dir("dvb");
+ dev_t dev = MKDEV(DVB_MAJOR, 0);
- retval = register_chrdev(DVB_MAJOR,"DVB", &dvb_device_fops);
- if (retval)
- printk("video_dev: unable to get major %d\n", DVB_MAJOR);
+ if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) {
+ printk("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) {
+ printk("dvb-core: unable to get major %d\n", DVB_MAJOR);
+ goto error;
+ }
+
+ dvb_class = class_create(THIS_MODULE, "dvb");
+ if (IS_ERR(dvb_class)) {
+ retval = PTR_ERR(dvb_class);
+ goto error;
+ }
+ return 0;
+
+error:
+ cdev_del(&dvb_device_cdev);
+ unregister_chrdev_region(dev, MAX_DVB_MINORS);
return retval;
}
static void __exit exit_dvbdev(void)
{
- unregister_chrdev(DVB_MAJOR, "DVB");
- devfs_remove("dvb");
+ class_destroy(dvb_class);
+ cdev_del(&dvb_device_cdev);
+ unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
}
module_init(init_dvbdev);
MODULE_DESCRIPTION("DVB Core Driver");
MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
MODULE_LICENSE("GPL");
-
-MODULE_PARM(dvbdev_debug,"i");
-MODULE_PARM_DESC(dvbdev_debug, "enable verbose debug messages");
-
git://git.onelab.eu / linux-2.6.git / blobdiff