Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c
new file mode 100644
index 0000000..cf4ffe3
--- /dev/null
+++ b/drivers/media/dvb/dvb-core/dvbdev.c
@@ -0,0 +1,449 @@
+/*
+ * 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/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 "dvbdev.h"
+
+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 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)
+
+struct class_simple *dvb_class;
+EXPORT_SYMBOL(dvb_class);
+
+static struct dvb_device* dvbdev_find_device (int minor)
+{
+ struct list_head *entry;
+
+ list_for_each (entry, &dvb_adapter_list) {
+ struct list_head *entry0;
+ struct dvb_adapter *adap;
+ adap = list_entry (entry, struct dvb_adapter, list_head);
+ list_for_each (entry0, &adap->device_list) {
+ struct dvb_device *dev;
+ dev = list_entry (entry0, struct dvb_device, list_head);
+ if (nums2minor(adap->num, dev->type, dev->id) == minor)
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+
+
+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;
+
+ 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;
+ }
+ return -ENODEV;
+}
+
+
+static struct file_operations dvb_device_fops =
+{
+ .owner = THIS_MODULE,
+ .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;
+
+ 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);
+
+
+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;
+
+ 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)
+{
+ u32 id = 0;
+
+ while (id < DVB_MAX_IDS) {
+ struct list_head *entry;
+ list_for_each (entry, &adap->device_list) {
+ struct dvb_device *dev;
+ dev = list_entry (entry, struct dvb_device, 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;
+ int id;
+
+ if (down_interruptible (&dvbdev_register_lock))
+ return -ERESTARTSYS;
+
+ if ((id = dvbdev_get_free_id (adap, type)) < 0) {
+ up (&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);
+ 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->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);
+
+ class_simple_device_add(dvb_class, MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
+ NULL, "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),
+ 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_simple_device_remove(MKDEV(DVB_MAJOR, nums2minor(dvbdev->adapter->num,
+ dvbdev->type, dvbdev->id)));
+
+ list_del (&dvbdev->list_head);
+ kfree (dvbdev);
+}
+EXPORT_SYMBOL(dvb_unregister_device);
+
+
+static int dvbdev_get_free_adapter_num (void)
+{
+ int num = 0;
+
+ while (num < DVB_MAX_ADAPTERS) {
+ 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)
+ goto skip;
+ }
+ return num;
+skip:
+ num++;
+ }
+
+ return -ENFILE;
+}
+
+
+int dvb_register_adapter(struct dvb_adapter **padap, const char *name, struct module *module)
+{
+ struct dvb_adapter *adap;
+ int num;
+
+ if (down_interruptible (&dvbdev_register_lock))
+ return -ERESTARTSYS;
+
+ if ((num = dvbdev_get_free_adapter_num ()) < 0) {
+ up (&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;
+
+ list_add_tail (&adap->list_head, &dvb_adapter_list);
+
+ up (&dvbdev_register_lock);
+
+ return num;
+}
+EXPORT_SYMBOL(dvb_register_adapter);
+
+
+int dvb_unregister_adapter(struct dvb_adapter *adap)
+{
+ devfs_remove("dvb/adapter%d", adap->num);
+
+ if (down_interruptible (&dvbdev_register_lock))
+ return -ERESTARTSYS;
+ list_del (&adap->list_head);
+ up (&dvbdev_register_lock);
+ kfree (adap);
+ 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;
+ dev_t dev = MKDEV(DVB_MAJOR, 0);
+
+ 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;
+ }
+
+ devfs_mk_dir("dvb");
+
+ dvb_class = class_simple_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)
+{
+ devfs_remove("dvb");
+ class_simple_destroy(dvb_class);
+ cdev_del(&dvb_device_cdev);
+ unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
+}
+
+module_init(init_dvbdev);
+module_exit(exit_dvbdev);
+
+MODULE_DESCRIPTION("DVB Core Driver");
+MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
+MODULE_LICENSE("GPL");
