/* $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 #include #include #include #include #include #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 $"; static int major; MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards"); MODULE_AUTHOR("Cytronics & Melware, Eicon Networks"); MODULE_SUPPORTED_DEVICE("DIVA card driver"); MODULE_LICENSE("GPL"); static int buffer_length = 128; module_param(buffer_length, int, 0); static unsigned long diva_dbg_mem = 0; module_param(diva_dbg_mem, ulong, 0); static char *DRIVERNAME = "Eicon DIVA - MAINT module (http://www.melware.net)"; static char *DRIVERLNAME = "diva_mnt"; static char *DEVNAME = "DivasMAINT"; char *DRIVERRELEASE_MNT = "2.0"; static wait_queue_head_t msgwaitq; static unsigned long opened; static struct timeval start_time; extern int mntfunc_init(int *, void **, unsigned long); extern void mntfunc_finit(void); extern int maint_read_write(void __user *buf, int count); /* * helper functions */ static char *getrev(const char *revision) { char *rev; char *p; if ((p = strchr(revision, ':'))) { rev = p + 2; p = strchr(rev, '$'); *--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 timeval tv; do_gettimeofday(&tv); if (tv.tv_sec > start_time.tv_sec) { if (start_time.tv_usec > tv.tv_usec) { tv.tv_sec--; tv.tv_usec += 1000000; } *sec = (dword) (tv.tv_sec - start_time.tv_sec); *usec = (dword) (tv.tv_usec - start_time.tv_usec); } else if (tv.tv_sec == start_time.tv_sec) { *sec = 0; if (start_time.tv_usec < tv.tv_usec) { *usec = (dword) (tv.tv_usec - start_time.tv_usec); } else { *usec = 0; } } else { *sec = (dword) tv.tv_sec; *usec = (dword) tv.tv_usec; } } /* * device node operations */ static unsigned int maint_poll(struct file *file, poll_table *wait) { unsigned int mask = 0; poll_wait(file, &msgwaitq, wait); mask = POLLOUT | POLLWRNORM; if (file->private_data || diva_dbg_q_length()) { mask |= POLLIN | POLLRDNORM; } 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 DIVA_INIT_FUNCTION 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 DIVA_INIT_FUNCTION maint_init(void) { char tmprev[50]; int ret = 0; void *buffer = NULL; do_gettimeofday(&start_time); 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 DIVA_EXIT_FUNCTION 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);