linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Support for IDE interfaces on PowerMacs.

 *

 * These IDE interfaces are memory-mapped and have a DBDMA channel

 * for doing DMA.

 *

 *  Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt

 *  Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz

 *

 * Some code taken from drivers/ide/ide-dma.c:

 *

 *  Copyright (c) 1995-1998  Mark Lord

 *

 * TODO: - Use pre-calculated (kauai) timing tables all the time and

 * get rid of the "rounded" tables used previously, so we have the

 * same table format for all controllers and can then just have one

 * big table

 */

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/ide.h>

#include <linux/notifier.h>

#include <linux/module.h>

#include <linux/reboot.h>

#include <linux/pci.h>

#include <linux/adb.h>

#include <linux/pmu.h>

#include <linux/scatterlist.h>

#include <linux/slab.h>

​

#include <asm/prom.h>

#include <asm/io.h>

#include <asm/dbdma.h>

#include <asm/ide.h>

#include <asm/machdep.h>

#include <asm/pmac_feature.h>

#include <asm/sections.h>

#include <asm/irq.h>

#include <asm/mediabay.h>

​

#define DRV_NAME "ide-pmac"

​

#undef IDE_PMAC_DEBUG

​

#define DMA_WAIT_TIMEOUT    50

​

typedef struct pmac_ide_hwif {

    unsigned long           regbase;

    int             irq;

    int             kind;

    int             aapl_bus_id;

    unsigned            broken_dma : 1;

    unsigned            broken_dma_warn : 1;

    struct device_node*     node;

    struct macio_dev        *mdev;

    u32             timings[4];

    volatile u32 __iomem *      *kauai_fcr;

    ide_hwif_t          *hwif;

​

    /* Those fields are duplicating what is in hwif. We currently

     * can't use the hwif ones because of some assumptions that are

     * beeing done by the generic code about the kind of dma controller

     * and format of the dma table. This will have to be fixed though.

     */

    volatile struct dbdma_regs __iomem *    dma_regs;

    struct dbdma_cmd*       dma_table_cpu;

} pmac_ide_hwif_t;

​

enum {

    controller_ohare,   /* OHare based */

    controller_heathrow,    /* Heathrow/Paddington */

    controller_kl_ata3, /* KeyLargo ATA-3 */

    controller_kl_ata4, /* KeyLargo ATA-4 */

    controller_un_ata6, /* UniNorth2 ATA-6 */

    controller_k2_ata6, /* K2 ATA-6 */

    controller_sh_ata6, /* Shasta ATA-6 */

};

​

static const char* model_name[] = {

    "OHare ATA",        /* OHare based */

    "Heathrow ATA",     /* Heathrow/Paddington */

    "KeyLargo ATA-3",   /* KeyLargo ATA-3 (MDMA only) */

    "KeyLargo ATA-4",   /* KeyLargo ATA-4 (UDMA/66) */

    "UniNorth ATA-6",   /* UniNorth2 ATA-6 (UDMA/100) */

    "K2 ATA-6",     /* K2 ATA-6 (UDMA/100) */

    "Shasta ATA-6",     /* Shasta ATA-6 (UDMA/133) */

};

​

/*