path: root/drivers/net/irda/via-ircc.c

/********************************************************************
 Filename:      via-ircc.c
 Version:       1.0 
 Description:   Driver for the VIA VT8231/VT8233 IrDA chipsets
 Author:        VIA Technologies,inc
 Date  :	08/06/2003

Copyright (c) 1998-2003 VIA Technologies, Inc.

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 WARRANTIES OR REPRESENTATIONS; 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.

F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
F02 Oct/28/02: Add SB device ID for 3147 and 3177.
 Comment :
       jul/09/2002 : only implement two kind of dongle currently.
       Oct/02/2002 : work on VT8231 and VT8233 .
       Aug/06/2003 : change driver format to pci driver .

2004-02-16: <sda@bdit.de>
- Removed unneeded 'legacy' pci stuff.
- Make sure SIR mode is set (hw_init()) before calling mode-dependent stuff.
- On speed change from core, don't send SIR frame with new speed. 
  Use current speed and change speeds later.
- Make module-param dongle_id actually work.
- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only. 
  Tested with home-grown PCB on EPIA boards.
- Code cleanup.
       
 ********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/rtnetlink.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#include <linux/pm.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>

#include "via-ircc.h"

#define VIA_MODULE_NAME "via-ircc"
#define CHIP_IO_EXTENT 0x40

static char *driver_name = VIA_MODULE_NAME;

/* Module parameters */
static int qos_mtt_bits = 0x07;	/* 1 ms or more */
static int dongle_id = 0;	/* default: probe */

/* We can't guess the type of connected dongle, user *must* supply it. */
module_param(dongle_id, int, 0);

/* Some prototypes */
static int via_ircc_open(struct pci_dev *pdev, chipio_t *info,
			 unsigned int id);
static int via_ircc_dma_receive(struct via_ircc_cb *self);
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
					 int iobase);
static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
						struct net_device *dev);
static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
						struct net_device *dev);
static void via_hw_init(struct via_ircc_cb *self);
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
static int via_ircc_is_receiving(struct via_ircc_cb *self);
static int via_ircc_read_dongle_id(int iobase);

static int via_ircc_net_open(struct net_device *dev);
static int via_ircc_net_close(struct net_device *dev);
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
			      int cmd);
static void via_ircc_change_dongle_speed(int iobase, int speed,
					 int dongle_id);
static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
static void hwreset(struct via_ircc_cb *self);
static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
static int upload_rx