diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvbdev.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvbdev.c | 507 |
1 files changed, 0 insertions, 507 deletions
diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c deleted file mode 100644 index 39eab73b01ae..000000000000 --- a/drivers/media/dvb/dvb-core/dvbdev.c +++ /dev/null @@ -1,507 +0,0 @@ -/* - * dvbdev.c - * - * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> - * & Marcus Metzler <marcus@convergence.de> - * for convergence integrated media GmbH - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public License - * as published by the Free Software Foundation; either version 2.1 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - */ - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/module.h> -#include <linux/kernel.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" - -static DEFINE_MUTEX(dvbdev_mutex); -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 DEFINE_MUTEX(dvbdev_register_lock); - -static const char * const dnames[] = { - "video", "audio", "sec", "frontend", "demux", "dvr", "ca", - "net", "osd" -}; - -#ifdef CONFIG_DVB_DYNAMIC_MINORS -#define MAX_DVB_MINORS 256 -#define DVB_MAX_IDS MAX_DVB_MINORS -#else -#define DVB_MAX_IDS 4 -#define nums2minor(num,type,id) ((num << 6) | (id << 4) | 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 *old_fops; - - file->private_data = dvbdev; - old_fops = file->f_op; - file->f_op = fops_get(dvbdev->fops); - if (file->f_op == NULL) { - file->f_op = old_fops; - goto fail; - } - 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); - up_read(&minor_rwsem); - mutex_unlock(&dvbdev_mutex); - 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++; - 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; -} - - -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; - struct device *clsdev; - int minor; - int id; - - mutex_lock(&dvbdev_register_lock); - - if ((id = dvbdev_get_free_id (adap, type)) < 0){ - mutex_unlock(&dvbdev_register_lock); - *pdvbdev = NULL; - printk(KERN_ERR "%s: couldn't find free device id\n", __func__); - return -ENFILE; - } - - *pdvbdev = dvbdev = kmalloc(sizeof(struct dvb_device), GFP_KERNEL); - - if (!dvbdev){ - 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; - } - - memcpy(dvbdev, template, sizeof(struct dvb_device)); - dvbdev->type = type; - dvbdev->id = id; - dvbdev->adapter = adap; - dvbdev->priv = priv; - dvbdev->fops = dvbdevfops; - init_waitqueue_head (&dvbdev->wait_queue); - - memcpy(dvbdevfops, template->fops, sizeof(struct file_operations)); - 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) { - kfree(dvbdevfops); - 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] = dvbdev; - up_write(&minor_rwsem); - - mutex_unlock(&dvbdev_register_lock); - - 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)) { - printk(KERN_ERR "%s: failed to create device dvb%d.%s%d (%ld)\n", - __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); - return PTR_ERR(clsdev); - } - - dprintk(KERN_DEBUG "DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", - adap->num, dnames[type], id, minor, minor); - - return 0; -} -EXPORT_SYMBOL(dvb_register_device); - - -void dvb_unregister_device(struct dvb_device *dvbdev) -{ - if (!dvbdev) - return; - - down_write(&minor_rwsem); - dvb_minors[dvbdev->minor] = NULL; - up_write(&minor_rwsem); - - device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); - - list_del (&dvbdev->list_head); - kfree (dvbdev->fops); - kfree (dvbdev); -} -EXPORT_SYMBOL(dvb_unregister_device); - -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); - - printk(KERN_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); - - 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 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 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 */ - mutex_lock(&dvbdev_mutex); - if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) - err = -EINVAL; - mutex_unlock(&dvbdev_mutex); - - 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 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) { - printk(KERN_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) { - printk(KERN_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) -{ - class_destroy(dvb_class); - cdev_del(&dvb_device_cdev); - unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); -} - -subsys_initcall(init_dvbdev); -module_exit(exit_dvbdev); - -MODULE_DESCRIPTION("DVB Core Driver"); -MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); -MODULE_LICENSE("GPL"); |