staging: dgnc: add dgnc digi driver

This patch adds the DGNC driver. This is a TTY Serial Port
Driver for the Digi International Neo and Classic PCI based product
line by Digi International <http://www.digi.com>.

This driver isn't hooked up to the build system because it doesn't
build, it merely adds the driver written by Digi to the kernel tree so
that it can be cleaned up and fixed up properly over time.

Cc: Mark Hounschell <markh@compro.net>
Signed-off-by: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 313 insertions, 0 deletions

diff --git a/drivers/staging/dgnc/dgnc_mgmt.c b/drivers/staging/dgnc/dgnc_mgmt.c
new file mode 100644
index 000000000000..b8e47920111d
--- /dev/null
+++ b/drivers/staging/dgnc/dgnc_mgmt.c
@@ -0,0 +1,313 @@
+/*
+ * Copyright 2003 Digi International (www.digi.com)
+ *	Scott H Kilau <Scott_Kilau at digi dot com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *	NOTE TO LINUX KERNEL HACKERS:  DO NOT REFORMAT THIS CODE! 
+ *
+ *	This is shared code between Digi's CVS archive and the
+ *	Linux Kernel sources.
+ *	Changing the source just for reformatting needlessly breaks
+ *	our CVS diff history.
+ *
+ *	Send any bug fixes/changes to:  Eng.Linux at digi dot com. 
+ *	Thank you. 
+ *
+ */
+
+/************************************************************************
+ * 
+ * This file implements the mgmt functionality for the
+ * Neo and ClassicBoard based product lines.
+ * 
+ ************************************************************************
+ * $Id: dgnc_mgmt.c,v 1.2 2010/12/14 20:08:29 markh Exp $
+ */
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/ctype.h>
+#include <linux/sched.h>	/* For jiffies, task states */
+#include <linux/interrupt.h>	/* For tasklet and interrupt structs/defines */
+#include <linux/serial_reg.h>
+#include <linux/termios.h>
+#include <asm/uaccess.h>	/* For copy_from_user/copy_to_user */
+
+#include "dgnc_driver.h"
+#include "dgnc_pci.h"
+#include "dgnc_proc.h"
+#include "dgnc_kcompat.h"	/* Kernel 2.4/2.6 compat includes */
+#include "dgnc_mgmt.h"
+#include "dpacompat.h"
+
+
+/* Our "in use" variables, to enforce 1 open only */
+static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
+
+
+/*
+ * dgnc_mgmt_open()  
+ *
+ * Open the mgmt/downld/dpa device
+ */  
+int dgnc_mgmt_open(struct inode *inode, struct file *file)
+{
+	unsigned long lock_flags;
+	unsigned int minor = iminor(inode);
+
+	DPR_MGMT(("dgnc_mgmt_open start.\n"));
+
+	DGNC_LOCK(dgnc_global_lock, lock_flags); 
+
+	/* mgmt device */
+	if (minor < MAXMGMTDEVICES) {
+		/* Only allow 1 open at a time on mgmt device */
+		if (dgnc_mgmt_in_use[minor]) {
+			DGNC_UNLOCK(dgnc_global_lock, lock_flags); 
+			return (-EBUSY);
+		}
+		dgnc_mgmt_in_use[minor]++;
+	}
+	else {
+		DGNC_UNLOCK(dgnc_global_lock, lock_flags); 
+		return (-ENXIO);
+	}
+
+	DGNC_UNLOCK(dgnc_global_lock, lock_flags); 
+
+	DPR_MGMT(("dgnc_mgmt_open finish.\n"));
+
+	return 0;
+}
+
+
+/*
+ * dgnc_mgmt_close()
+ *
+ * Open the mgmt/dpa device
+ */  
+int dgnc_mgmt_close(struct inode *inode, struct file *file)
+{
+	unsigned long lock_flags;
+	unsigned int minor = iminor(inode);
+
+	DPR_MGMT(("dgnc_mgmt_close start.\n"));
+
+	DGNC_LOCK(dgnc_global_lock, lock_flags); 
+
+	/* mgmt device */
+	if (minor < MAXMGMTDEVICES) {
+		if (dgnc_mgmt_in_use[minor]) {
+			dgnc_mgmt_in_use[minor] = 0;
+		}
+	}
+	DGNC_UNLOCK(dgnc_global_lock, lock_flags); 
+
+	DPR_MGMT(("dgnc_mgmt_close finish.\n"));
+
+	return 0;
+}
+
+
+/*
+ * dgnc_mgmt_ioctl()
+ *
+ * ioctl the mgmt/dpa device
+ */  
+#ifdef HAVE_UNLOCKED_IOCTL
+long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+#else        
+int dgnc_mgmt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+#endif
+	unsigned long lock_flags;
+	void __user *uarg = (void __user *) arg;
+
+	DPR_MGMT(("dgnc_mgmt_ioctl start.\n"));
+
+	switch (cmd) {
+
+	case DIGI_GETDD:
+	{
+		/*
+		 * This returns the total number of boards
+		 * in the system, as well as driver version
+		 * and has space for a reserved entry
+		 */
+		struct digi_dinfo ddi;
+
+		DGNC_LOCK(dgnc_global_lock, lock_flags); 
+
+		ddi.dinfo_nboards = dgnc_NumBoards;
+		sprintf(ddi.dinfo_version, "%s", DG_PART);
+
+		DGNC_UNLOCK(dgnc_global_lock, lock_flags); 
+
+		DPR_MGMT(("DIGI_GETDD returning numboards: %d version: %s\n",
+			ddi.dinfo_nboards, ddi.dinfo_version));
+
+		if (copy_to_user(uarg, &ddi, sizeof (ddi)))
+			return(-EFAULT);
+
+		break;
+	}
+
+	case DIGI_GETBD:
+	{
+		int brd;
+
+		struct digi_info di;
+
+		if (copy_from_user(&brd, uarg, sizeof(int))) {
+			return(-EFAULT);
+		}
+
+		DPR_MGMT(("DIGI_GETBD asking about board: %d\n", brd));
+
+		if ((brd < 0) || (brd > dgnc_NumBoards) || (dgnc_NumBoards == 0))
+			return (-ENODEV);
+
+		memset(&di, 0, sizeof(di));
+
+		di.info_bdnum = brd;
+
+		DGNC_LOCK(dgnc_Board[brd]->bd_lock, lock_flags); 
+
+		di.info_bdtype = dgnc_Board[brd]->dpatype;
+		di.info_bdstate = dgnc_Board[brd]->dpastatus;
+		di.info_ioport = 0;
+		di.info_physaddr = (ulong) dgnc_Board[brd]->membase;
+		di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end;
+		if (dgnc_Board[brd]->state != BOARD_FAILED)
+			di.info_nports = dgnc_Board[brd]->nasync;
+		else
+			di.info_nports = 0;
+
+		DGNC_UNLOCK(dgnc_Board[brd]->bd_lock, lock_flags); 
+
+		DPR_MGMT(("DIGI_GETBD returning type: %x state: %x ports: %x size: %x\n",
+			di.info_bdtype, di.info_bdstate, di.info_nports, di.info_physsize));
+
+		if (copy_to_user(uarg, &di, sizeof (di)))
+			return (-EFAULT);
+
+		break;
+	}
+
+	case DIGI_GET_NI_INFO:
+	{
+		struct channel_t *ch;
+		struct ni_info ni;
+		uchar mstat = 0;
+		uint board = 0;
+		uint channel = 0;
+
+		if (copy_from_user(&ni, uarg, sizeof(struct ni_info))) {
+			return(-EFAULT);
+		}
+
+		DPR_MGMT(("DIGI_GETBD asking about board: %d channel: %d\n",
+			ni.board, ni.channel));
+
+		board = ni.board;
+		channel = ni.channel;
+
+		/* Verify boundaries on board */
+		if ((board < 0) || (board > dgnc_NumBoards) || (dgnc_NumBoards == 0))
+			return (-ENODEV);
+
+		/* Verify boundaries on channel */
+		if ((channel < 0) || (channel > dgnc_Board[board]->nasync))
+			return (-ENODEV);
+
+		ch = dgnc_Board[board]->channels[channel];
+
+		if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
+			return (-ENODEV);
+
+		memset(&ni, 0, sizeof(ni));
+		ni.board = board;
+		ni.channel = channel;
+
+		DGNC_LOCK(ch->ch_lock, lock_flags);
+
+		mstat = (ch->ch_mostat | ch->ch_mistat);
+
+		if (mstat & UART_MCR_DTR) {
+			ni.mstat |= TIOCM_DTR;
+			ni.dtr = TIOCM_DTR;
+		}
+		if (mstat & UART_MCR_RTS) {
+			ni.mstat |= TIOCM_RTS;
+			ni.rts = TIOCM_RTS;
+		}
+		if (mstat & UART_MSR_CTS) {
+			ni.mstat |= TIOCM_CTS;
+			ni.cts = TIOCM_CTS;
+		}
+		if (mstat & UART_MSR_RI) {
+			ni.mstat |= TIOCM_RI;
+			ni.ri = TIOCM_RI;
+		}
+		if (mstat & UART_MSR_DCD) {
+			ni.mstat |= TIOCM_CD;
+			ni.dcd = TIOCM_CD;
+		}
+		if (mstat & UART_MSR_DSR)
+			ni.mstat |= TIOCM_DSR;
+
+		ni.iflag = ch->ch_c_iflag;
+		ni.oflag = ch->ch_c_oflag;
+		ni.cflag = ch->ch_c_cflag;
+		ni.lflag = ch->ch_c_lflag;
+
+		if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS)
+			ni.hflow = 1;
+		else
+			ni.hflow = 0;
+
+		if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI))
+			ni.recv_stopped = 1;
+		else
+			ni.recv_stopped = 0;
+
+		if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
+			ni.xmit_stopped = 1;
+		else
+			ni.xmit_stopped = 0;
+
+		ni.curtx = ch->ch_txcount;
+		ni.currx = ch->ch_rxcount;
+
+		ni.baud = ch->ch_old_baud;
+
+		DGNC_UNLOCK(ch->ch_lock, lock_flags);
+
+		if (copy_to_user(uarg, &ni, sizeof(ni)))
+			return (-EFAULT);
+
+		break;
+	}
+
+
+	}
+
+	DPR_MGMT(("dgnc_mgmt_ioctl finish.\n"));
+
+	return 0;
+}