Subversion Repositories or1k

/*

 *  linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver

 *

 *     Created 9 Jul 1997 by Geert Uytterhoeven

 *

 *  This file is subject to the terms and conditions of the GNU General Public

 *  License.  See the file COPYING in the main directory of this archive for

 *  more details.

 */

#include <linux/config.h>

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/interrupt.h>

#include <linux/blkdev.h>

#include <linux/hdreg.h>

#include <linux/ide.h>

#include <linux/init.h>

#include <linux/zorro.h>

#include <asm/setup.h>

#include <asm/amigahw.h>

#include <asm/amigaints.h>

#include <asm/amigayle.h>

    /*

     *  Bases of the IDE interfaces

     */

#define GAYLE_BASE_4000 0xdd2020        /* A4000/A4000T */

#define GAYLE_BASE_1200 0xda0000        /* A1200/A600 and E-Matrix 530 */

    /*

     *  Offsets from one of the above bases

     */

#define GAYLE_DATA      0x00

#define GAYLE_ERROR     0x06            /* see err-bits */

#define GAYLE_NSECTOR   0x0a            /* nr of sectors to read/write */

#define GAYLE_SECTOR    0x0e            /* starting sector */

#define GAYLE_LCYL      0x12            /* starting cylinder */

#define GAYLE_HCYL      0x16            /* high byte of starting cyl */

#define GAYLE_SELECT    0x1a            /* 101dhhhh , d=drive, hhhh=head */

#define GAYLE_STATUS    0x1e            /* see status-bits */

#define GAYLE_CONTROL   0x101a

static int gayle_offsets[IDE_NR_PORTS] __initdata = {

    GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,

    GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1

};

    /*

     *  These are at different offsets from the base

     */

#define GAYLE_IRQ_4000  0xdd3020        /* MSB = 1, Harddisk is source of */

#define GAYLE_IRQ_1200  0xda9000        /* interrupt */

    /*

     *  Offset of the secondary port for IDE doublers

     *  Note that GAYLE_CONTROL is NOT available then!

     */

#define GAYLE_NEXT_PORT 0x1000

#ifndef CONFIG_BLK_DEV_IDEDOUBLER

#define GAYLE_NUM_HWIFS         1

#define GAYLE_NUM_PROBE_HWIFS   GAYLE_NUM_HWIFS

#define GAYLE_HAS_CONTROL_REG   1

#define GAYLE_IDEREG_SIZE       0x2000

#else /* CONFIG_BLK_DEV_IDEDOUBLER */

#define GAYLE_NUM_HWIFS         2

#define GAYLE_NUM_PROBE_HWIFS   (ide_doubler ? GAYLE_NUM_HWIFS : \

                                               GAYLE_NUM_HWIFS-1)

#define GAYLE_HAS_CONTROL_REG   (!ide_doubler)

#define GAYLE_IDEREG_SIZE       (ide_doubler ? 0x1000 : 0x2000)

int ide_doubler = 0;     /* support IDE doublers? */

#endif /* CONFIG_BLK_DEV_IDEDOUBLER */

    /*

     *  Check and acknowledge the interrupt status

     */

static int gayle_ack_intr_a4000(ide_hwif_t *hwif)

{

    unsigned char ch;

    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);

    if (!(ch & GAYLE_IRQ_IDE))

        return 0;

    return 1;

}

static int gayle_ack_intr_a1200(ide_hwif_t *hwif)

{

    unsigned char ch;

    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);

    if (!(ch & GAYLE_IRQ_IDE))

        return 0;

    (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);

    z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);

    return 1;

}

    /*

     *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)

     */

void __init gayle_init(void)

{

    int a4000, i;

    if (!MACH_IS_AMIGA)

        return;

    if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))

        goto found;

#ifdef CONFIG_ZORRO

    if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,

                          NULL))

        goto found;

#endif

    return;

found:

    for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {

        ide_ioreg_t base, ctrlport, irqport;

        ide_ack_intr_t *ack_intr;

        hw_regs_t hw;

        ide_hwif_t *hwif;

        int index;

        unsigned long phys_base, res_start, res_n;

        if (a4000) {

            phys_base = GAYLE_BASE_4000;

            irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_4000);

            ack_intr = gayle_ack_intr_a4000;

        } else {

            phys_base = GAYLE_BASE_1200;

            irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_1200);

            ack_intr = gayle_ack_intr_a1200;

        }

/*

 * FIXME: we now have selectable modes between mmio v/s iomio

 */

        phys_base += i*GAYLE_NEXT_PORT;

        res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);

        res_n = GAYLE_IDEREG_SIZE;

        if (!request_mem_region(res_start, res_n, "IDE"))

            continue;

        base = (ide_ioreg_t)ZTWO_VADDR(phys_base);

        ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;

        ide_setup_ports(&hw, base, gayle_offsets,

                        ctrlport, irqport, ack_intr,

//                      &gayle_iops,

                        IRQ_AMIGA_PORTS);

        index = ide_register_hw(&hw, &hwif);

        if (index != -1) {

            hwif->mmio = 2;

            switch (i) {

                case 0:

                    printk("ide%d: Gayle IDE interface (A%d style)\n", index,

                           a4000 ? 4000 : 1200);

                    break;

#ifdef CONFIG_BLK_DEV_IDEDOUBLER

                case 1:

                    printk("ide%d: IDE doubler\n", index);

                    break;

#endif /* CONFIG_BLK_DEV_IDEDOUBLER */

            }

        } else

            release_mem_region(res_start, res_n);

    }

}