path: root/drivers/isdn/hardware/avm/c4.c

/* $Id: c4.c,v 1.1.2.2 2004/01/16 21:09:27 keil Exp $
 * 
 * Module for AVM C4 & C2 card.
 * 
 * Copyright 1999 by Carsten Paeth <calle@calle.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/kernel.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/capi.h>
#include <linux/kernelcapi.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"

#undef AVM_C4_DEBUG
#undef AVM_C4_POLLDEBUG

/* ------------------------------------------------------------- */

static char *revision = "$Revision: 1.1.2.2 $";

/* ------------------------------------------------------------- */

static int suppress_pollack;

static struct pci_device_id c4_pci_tbl[] = {
	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_C4, 0, 0, (unsigned long)4 },
	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_C2, 0, 0, (unsigned long)2 },
	{ }			/* Terminating entry */
};

MODULE_DEVICE_TABLE(pci, c4_pci_tbl);
MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM C2/C4 cards");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");
module_param(suppress_pollack, bool, 0);

/* ------------------------------------------------------------- */

static void c4_dispatch_tx(avmcard *card);

/* ------------------------------------------------------------- */

#define DC21285_DRAM_A0MR	0x40000000
#define DC21285_DRAM_A1MR	0x40004000
#define DC21285_DRAM_A2MR	0x40008000
#define DC21285_DRAM_A3MR	0x4000C000

#define	CAS_OFFSET	0x88

#define DC21285_ARMCSR_BASE	0x42000000

#define	PCI_OUT_INT_STATUS	0x30
#define	PCI_OUT_INT_MASK	0x34
#define	MAILBOX_0		0x50
#define	MAILBOX_1		0x54
#define	MAILBOX_2		0x58
#define	MAILBOX_3		0x5C
#define	DOORBELL		0x60
#define	DOORBELL_SETUP		0x64

#define CHAN_1_CONTROL		0x90
#define CHAN_2_CONTROL		0xB0
#define DRAM_TIMING		0x10C
#define DRAM_ADDR_SIZE_0	0x110
#define DRAM_ADDR_SIZE_1	0x114
#define DRAM_ADDR_SIZE_2	0x118
#define DRAM_ADDR_SIZE_3	0x11C
#define	SA_CONTROL		0x13C
#define	XBUS_CYCLE		0x148
#define	XBUS_STROBE		0x14C
#define	DBELL_PCI_MASK		0x150
#define DBELL_SA_MASK		0x154

#define SDRAM_SIZE		0x1000000

/* ------------------------------------------------------------- */

#define	MBOX_PEEK_POKE		MAILBOX_0

#define DBELL_ADDR		0x01
#define DBELL_DATA		0x02
#define DBELL_RNWR		0x40
#define DBELL_INIT		0x80

/* ------------------------------------------------------------- */

#define	MBOX_UP_ADDR		MAILBOX_0
#define	MBOX_UP_LEN		MAILBOX_1
#define	MBOX_DOWN_ADDR		MAILBOX_2
#define	MBOX_DOWN_LEN		MAILBOX_3

#define	DBELL_UP_HOST		0x00000100
#define	DBELL_UP_ARM		0x00000200
#define	DBELL_DOWN_HOST		0x00000400
#define	DBELL_DOWN_ARM		0x00000800
#define	DBELL_RESET_HOST	0x40000000
#define	DBELL_RESET_ARM		0x80000000

/* ------------------------------------------------------------- */

#define	DRAM_TIMING_DEF		0x001A01A5
#define DRAM_AD_SZ_DEF0		0x00000045
#define DRAM_AD_SZ_NULL		0x00000000

#define SA_CTL_ALLRIGHT		0x64AA0271

#define	INIT_XBUS_CYCLE		0x100016DB
#define	INIT_XBUS_STROBE	0xF1F1F1F1

/* ------------------------------------------------------------- */

#define	RESET_TIMEOUT		(15*HZ)	/* 15 sec */
#define	PEEK_POKE_TIMEOUT	(HZ/10)	/* 0.1 sec */

/* ------------------------------------------------------------- */

#define c4outmeml(addr, value)	writel(value, addr)
#define c4inmeml(addr)	readl(addr)
#define c4outmemw(addr, value)	writew(value, addr)
#define c4inmemw(addr)	readw(addr)
#define c4outmemb(addr, value)	writeb(value, addr)
#define c4inmemb(addr)	readb(addr)

/* ------------------------------------------------------------- */

static inline int wait_for_doorbell(avmcard *card, unsigned long t)
{
	unsigned