linux-imx

/*

 *  linux/drivers/acorn/scsi/cumana_2.c

 *

 *  Copyright (C) 1997-2005 Russell King

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 *  Changelog:

 *   30-08-1997 RMK 0.0.0   Created, READONLY version.

 *   22-01-1998 RMK 0.0.1   Updated to 2.1.80.

 *   15-04-1998 RMK 0.0.1   Only do PIO if FAS216 will allow it.

 *   02-05-1998 RMK 0.0.2   Updated & added DMA support.

 *   27-06-1998 RMK     Changed asm/delay.h to linux/delay.h

 *   18-08-1998 RMK 0.0.3   Fixed synchronous transfer depth.

 *   02-04-2000 RMK 0.0.4   Updated for new error handling code.

 */

#include <linux/module.h>

#include <linux/blkdev.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/ioport.h>

#include <linux/proc_fs.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/dma-mapping.h>

​

#include <asm/dma.h>

#include <asm/ecard.h>

#include <asm/io.h>

#include <asm/pgtable.h>

​

#include "../scsi.h"

#include <scsi/scsi_host.h>

#include "fas216.h"

#include "scsi.h"

​

#include <scsi/scsicam.h>

​

#define CUMANASCSI2_STATUS      (0x0000)

#define STATUS_INT          (1 << 0)

#define STATUS_DRQ          (1 << 1)

#define STATUS_LATCHED          (1 << 3)

​

#define CUMANASCSI2_ALATCH      (0x0014)

#define ALATCH_ENA_INT          (3)

#define ALATCH_DIS_INT          (2)

#define ALATCH_ENA_TERM         (5)

#define ALATCH_DIS_TERM         (4)

#define ALATCH_ENA_BIT32        (11)

#define ALATCH_DIS_BIT32        (10)

#define ALATCH_ENA_DMA          (13)

#define ALATCH_DIS_DMA          (12)

#define ALATCH_DMA_OUT          (15)

#define ALATCH_DMA_IN           (14)

​

#define CUMANASCSI2_PSEUDODMA       (0x0200)

​

#define CUMANASCSI2_FAS216_OFFSET   (0x0300)

#define CUMANASCSI2_FAS216_SHIFT    2

​

/*

 * Version

 */

#define VERSION "1.00 (13/11/2002 2.5.47)"

​

/*

 * Use term=0,1,0,0,0 to turn terminators on/off

 */

static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };

​

#define NR_SG   256

​

struct cumanascsi2_info {

    FAS216_Info     info;

    struct expansion_card   *ec;

    void __iomem        *base;

    unsigned int        terms;      /* Terminator state */

    struct scatterlist  sg[NR_SG];  /* Scatter DMA list */

};

​

#define CSTATUS_IRQ (1 << 0)

#define CSTATUS_DRQ (1 << 1)

​

/* Prototype: void cumanascsi_2_irqenable(ec, irqnr)

 * Purpose  : Enable interrupts on Cumana SCSI 2 card

 * Params   : ec    - expansion card structure

 *          : irqnr - interrupt number

 */

static void