Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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);