diff options
Diffstat (limited to 'drivers/isdn/hardware/eicon/divamnt.c')
| -rw-r--r-- | drivers/isdn/hardware/eicon/divamnt.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/eicon/divamnt.c b/drivers/isdn/hardware/eicon/divamnt.c new file mode 100644 index 000000000..5a95587b3 --- /dev/null +++ b/drivers/isdn/hardware/eicon/divamnt.c @@ -0,0 +1,239 @@ +/* $Id: divamnt.c,v 1.32.6.10 2005/02/11 19:40:25 armin Exp $ + * + * Driver for Eicon DIVA Server ISDN cards. + * Maint module + * + * Copyright 2000-2003 by Armin Schindler (mac@melware.de) + * Copyright 2000-2003 Cytronics & Melware (info@melware.de) + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/poll.h> +#include <linux/mutex.h> +#include <linux/uaccess.h> + +#include "platform.h" +#include "di_defs.h" +#include "divasync.h" +#include "debug_if.h" + +static DEFINE_MUTEX(maint_mutex); +static char *main_revision = "$Revision: 1.32.6.10 $"; + +static int major; + +MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards"); +MODULE_AUTHOR("Cytronics & Melware, Eicon Networks"); +MODULE_SUPPORTED_DEVICE("DIVA card driver"); +MODULE_LICENSE("GPL"); + +static int buffer_length = 128; +module_param(buffer_length, int, 0); +static unsigned long diva_dbg_mem = 0; +module_param(diva_dbg_mem, ulong, 0); + +static char *DRIVERNAME = + "Eicon DIVA - MAINT module (http://www.melware.net)"; +static char *DRIVERLNAME = "diva_mnt"; +static char *DEVNAME = "DivasMAINT"; +char *DRIVERRELEASE_MNT = "2.0"; + +static wait_queue_head_t msgwaitq; +static unsigned long opened; + +extern int mntfunc_init(int *, void **, unsigned long); +extern void mntfunc_finit(void); +extern int maint_read_write(void __user *buf, int count); + +/* + * helper functions + */ +static char *getrev(const char *revision) +{ + char *rev; + char *p; + + if ((p = strchr(revision, ':'))) { + rev = p + 2; + p = strchr(rev, '$'); + *--p = 0; + } else + rev = "1.0"; + + return rev; +} + +/* + * kernel/user space copy functions + */ +int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src, + int length) +{ + return (copy_to_user(dst, src, length)); +} +int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src, + int length) +{ + return (copy_from_user(dst, src, length)); +} + +/* + * get time + */ +void diva_os_get_time(dword *sec, dword *usec) +{ + struct timespec64 time; + + ktime_get_ts64(&time); + + *sec = (dword) time.tv_sec; + *usec = (dword) (time.tv_nsec / NSEC_PER_USEC); +} + +/* + * device node operations + */ +static __poll_t maint_poll(struct file *file, poll_table *wait) +{ + __poll_t mask = 0; + + poll_wait(file, &msgwaitq, wait); + mask = EPOLLOUT | EPOLLWRNORM; + if (file->private_data || diva_dbg_q_length()) { + mask |= EPOLLIN | EPOLLRDNORM; + } + return (mask); +} + +static int maint_open(struct inode *ino, struct file *filep) +{ + int ret; + + mutex_lock(&maint_mutex); + /* only one open is allowed, so we test + it atomically */ + if (test_and_set_bit(0, &opened)) + ret = -EBUSY; + else { + filep->private_data = NULL; + ret = nonseekable_open(ino, filep); + } + mutex_unlock(&maint_mutex); + return ret; +} + +static int maint_close(struct inode *ino, struct file *filep) +{ + if (filep->private_data) { + diva_os_free(0, filep->private_data); + filep->private_data = NULL; + } + + /* clear 'used' flag */ + clear_bit(0, &opened); + + return (0); +} + +static ssize_t divas_maint_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + return (maint_read_write((char __user *) buf, (int) count)); +} + +static ssize_t divas_maint_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + return (maint_read_write(buf, (int) count)); +} + +static const struct file_operations divas_maint_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = divas_maint_read, + .write = divas_maint_write, + .poll = maint_poll, + .open = maint_open, + .release = maint_close +}; + +static void divas_maint_unregister_chrdev(void) +{ + unregister_chrdev(major, DEVNAME); +} + +static int __init divas_maint_register_chrdev(void) +{ + if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0) + { + printk(KERN_ERR "%s: failed to create /dev entry.\n", + DRIVERLNAME); + return (0); + } + + return (1); +} + +/* + * wake up reader + */ +void diva_maint_wakeup_read(void) +{ + wake_up_interruptible(&msgwaitq); +} + +/* + * Driver Load + */ +static int __init maint_init(void) +{ + char tmprev[50]; + int ret = 0; + void *buffer = NULL; + + init_waitqueue_head(&msgwaitq); + + printk(KERN_INFO "%s\n", DRIVERNAME); + printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT); + strcpy(tmprev, main_revision); + printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD); + + if (!divas_maint_register_chrdev()) { + ret = -EIO; + goto out; + } + + if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) { + printk(KERN_ERR "%s: failed to connect to DIDD.\n", + DRIVERLNAME); + divas_maint_unregister_chrdev(); + ret = -EIO; + goto out; + } + + printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n", + DRIVERLNAME, buffer, (buffer_length / 1024), + (diva_dbg_mem == 0) ? "internal" : "external", major); + +out: + return (ret); +} + +/* +** Driver Unload +*/ +static void __exit maint_exit(void) +{ + divas_maint_unregister_chrdev(); + mntfunc_finit(); + + printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME); +} + +module_init(maint_init); +module_exit(maint_exit); |