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#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# warning "This module is tested only with 2.6 kernels"
#endif
#define DAHDI_PRINK_MACROS_USE_debug
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <dahdi/kernel.h>
#include "dahdi.h"
#include "dahdi-sysfs.h"
#define MAKE_DAHDI_DEV(num, name) \
CLASS_DEV_CREATE(dahdi_class, MKDEV(DAHDI_MAJOR, num), NULL, name)
#define DEL_DAHDI_DEV(num) \
CLASS_DEV_DESTROY(dahdi_class, MKDEV(DAHDI_MAJOR, num))
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
static struct class *dahdi_class;
#else
static struct class_simple *dahdi_class;
#define class_create class_simple_create
#define class_destroy class_simple_destroy
#endif
int chan_sysfs_create(struct dahdi_chan *chan)
{
char chan_name[32];
void *dummy;
int res = 0;
if (chan->channo >= 250)
return 0;
if (test_bit(DAHDI_FLAGBIT_DEVFILE, &chan->flags))
return 0;
snprintf(chan_name, sizeof(chan_name), "dahdi!%d", chan->channo);
dummy = (void *)CLASS_DEV_CREATE(dahdi_class,
MKDEV(DAHDI_MAJOR, chan->channo),
NULL, chan_name);
if (IS_ERR(dummy)) {
res = PTR_ERR(dummy);
chan_err(chan, "Failed creating sysfs device: %d\n",
res);
return res;
}
set_bit(DAHDI_FLAGBIT_DEVFILE, &chan->flags);
return 0;
}
void chan_sysfs_remove(struct dahdi_chan *chan)
{
if (!test_bit(DAHDI_FLAGBIT_DEVFILE, &chan->flags))
return;
CLASS_DEV_DESTROY(dahdi_class, MKDEV(DAHDI_MAJOR, chan->channo));
clear_bit(DAHDI_FLAGBIT_DEVFILE, &chan->flags);
}
int dahdi_register_chardev(struct dahdi_chardev *dev)
{
static const char *DAHDI_STRING = "dahdi!";
char *udevname;
udevname = kzalloc(strlen(dev->name) + sizeof(DAHDI_STRING) + 1,
GFP_KERNEL);
if (!udevname)
return -ENOMEM;
strcpy(udevname, DAHDI_STRING);
strcat(udevname, dev->name);
CLASS_DEV_CREATE(dahdi_class,
MKDEV(DAHDI_MAJOR, dev->minor), NULL, udevname);
kfree(udevname);
return 0;
}
EXPORT_SYMBOL(dahdi_register_chardev);
int dahdi_unregister_chardev(struct dahdi_chardev *dev)
{
CLASS_DEV_DESTROY(dahdi_class, MKDEV(DAHDI_MAJOR, dev->minor));
return 0;
}
EXPORT_SYMBOL(dahdi_unregister_chardev);
/* Only used to flag that the device exists: */
static struct {
unsigned int ctl:1;
unsigned int timer:1;
unsigned int channel:1;
unsigned int pseudo:1;
} dummy_dev;
int __init dahdi_sysfs_chan_init(const struct file_operations *fops)
{
int res = 0;
void *dev;
dahdi_class = class_create(THIS_MODULE, "dahdi");
if (IS_ERR(dahdi_class)) {
res = PTR_ERR(dahdi_class);
dahdi_err("%s: class_create(dahi_chan) failed. Error: %d\n",
__func__, res);
goto cleanup;
}
dahdi_dbg(DEVICES, "Creating /dev/dahdi/timer:\n");
dev = MAKE_DAHDI_DEV(DAHDI_TIMER, "dahdi!timer");
if (IS_ERR(dev)) {
res = PTR_ERR(dev);
goto cleanup;
}
dummy_dev.timer = 1;
dahdi_dbg(DEVICES, "Creating /dev/dahdi/channel:\n");
dev = MAKE_DAHDI_DEV(DAHDI_CHANNEL, "dahdi!channel");
if (IS_ERR(dev)) {
res = PTR_ERR(dev);
goto cleanup;
}
dummy_dev.channel = 1;
dahdi_dbg(DEVICES, "Creating /dev/dahdi/pseudo:\n");
dev = MAKE_DAHDI_DEV(DAHDI_PSEUDO, "dahdi!pseudo");
if (IS_ERR(dev)) {
res = PTR_ERR(dev);
goto cleanup;
}
dummy_dev.pseudo = 1;
dahdi_dbg(DEVICES, "Creating /dev/dahdi/ctl:\n");
dev = MAKE_DAHDI_DEV(DAHDI_CTL, "dahdi!ctl");
if (IS_ERR(dev)) {
res = PTR_ERR(dev);
goto cleanup;
}
dummy_dev.ctl = 1;
return 0;
cleanup:
dahdi_sysfs_chan_exit();
return res;
}
void dahdi_sysfs_chan_exit(void)
{
if (dummy_dev.pseudo) {
dahdi_dbg(DEVICES, "Removing /dev/dahdi/pseudo:\n");
DEL_DAHDI_DEV(DAHDI_PSEUDO);
dummy_dev.pseudo = 0;
}
if (dummy_dev.channel) {
dahdi_dbg(DEVICES, "Removing /dev/dahdi/channel:\n");
DEL_DAHDI_DEV(DAHDI_CHANNEL);
dummy_dev.channel = 0;
}
if (dummy_dev.timer) {
dahdi_dbg(DEVICES, "Removing /dev/dahdi/timer:\n");
DEL_DAHDI_DEV(DAHDI_TIMER);
dummy_dev.timer = 0;
}
if (dummy_dev.ctl) {
dahdi_dbg(DEVICES, "Removing /dev/dahdi/ctl:\n");
DEL_DAHDI_DEV(DAHDI_CTL);
dummy_dev.ctl = 0;
}
if (dahdi_class && !IS_ERR(dahdi_class)) {
dahdi_dbg(DEVICES, "Destroying DAHDI class\n");
class_destroy(dahdi_class);
dahdi_class = NULL;
}
}
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