path: root/drivers/net/irda/irport.c

/*********************************************************************
 * 
 * Filename:	  irport.c
 * Version:	  1.0
 * Description:   Half duplex serial port SIR driver for IrDA. 
 * Status:	  Experimental.
 * Author:	  Dag Brattli <dagb@cs.uit.no>
 * Created at:	  Sun Aug  3 13:49:59 1997
 * Modified at:   Fri Jan 28 20:22:38 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * Sources:	  serial.c by Linus Torvalds 
 * 
 *     Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes, All Rights Reserved.
 *     
 *     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 of 
 *     the License, or (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; 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., 59 Temple Place, Suite 330, Boston, 
 *     MA 02111-1307 USA
 *
 *     This driver is ment to be a small half duplex serial driver to be
 *     used for IR-chipsets that has a UART (16550) compatibility mode. 
 *     Eventually it will replace irtty, because of irtty has some 
 *     problems that is hard to get around when we don't have control
 *     over the serial driver. This driver may also be used by FIR 
 *     drivers to handle SIR mode for them.
 *
 ********************************************************************/

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/serial_reg.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/rtnetlink.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/io.h>

#include <net/irda/irda.h>
#include <net/irda/wrapper.h>
#include "irport.h"

#define IO_EXTENT 8

/* 
 * Currently you'll need to set these values using insmod like this:
 * insmod irport io=0x3e8 irq=11
 */
static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
static unsigned int irq[] = { 0, 0, 0, 0 };

static unsigned int qos_mtt_bits = 0x03;

static struct irport_cb *dev_self[] = { NULL, NULL, NULL, NULL};
static char *driver_name = "irport";

static inline void irport_write_wakeup(struct irport_cb *self);
static inline int  irport_write(int iobase, int fifo_size, __u8 *buf, int len);
static inline void irport_receive(struct irport_cb *self);

static int  irport_net_ioctl(struct net_device *dev, struct ifreq *rq, 
			     int cmd);
static inline int  irport_is_receiving(struct irport_cb *self);
static int  irport_set_dtr_rts(struct net_device *dev, int dtr, int rts);
static int  irport_raw_write(struct net_device *dev, __u8 *buf, int len);
static struct net_device_stats *irport_net_get_stats(struct net_device *dev);
static int irport_change_speed_complete(struct irda_task *task);
static void irport_timeout(struct net_device *dev);

static irqreturn_t irport_interrupt(int irq, void *dev_id,
				    struct pt_regs *regs);
static int irport_hard_xmit(struct sk_buff *skb, struct net_device *dev);
static void irport_change_speed(void *priv, __u32 speed);
static int irport_net_open(struct net_device *dev);
static int irport_net_close(struct net_device *dev);

static struct irport_cb *
irport_open(int i, unsigned int iobase, unsigned int irq)
{
	struct net_device *dev;
	struct irport_cb *self;

	IRDA_DEBUG(1, "%s()\n", __FUNCTION__);

	/* Lock the port that we need */
	if (!request_region(iobase, IO_EXTENT, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
			   __FUNCTION__, iobase);
		goto err_out1;
	}