path: root/drivers/ide/pmac.c

// 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