[mirror_ubuntu-zesty-kernel.git] / drivers / ide / legacy / macide.c

/*
 *  Macintosh IDE Driver
 *
 *     Copyright (C) 1998 by Michael Schmitz
 *
 *  This driver was written based on information obtained from the MacOS IDE
 *  driver binary by Mikael Forselius
 *
 *  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/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/delay.h>
#include <linux/ide.h>

#include <asm/machw.h>
#include <asm/macintosh.h>
#include <asm/macints.h>
#include <asm/mac_baboon.h>

#define IDE_BASE 0x50F1A000	/* Base address of IDE controller */

/*
 * Generic IDE registers as offsets from the base
 * These match MkLinux so they should be correct.
 */

#define IDE_CONTROL	0x38	/* control/altstatus */

/*
 * Mac-specific registers
 */

/*
 * this register is odd; it doesn't seem to do much and it's
 * not word-aligned like virtually every other hardware register
 * on the Mac...
 */

#define IDE_IFR		0x101	/* (0x101) IDE interrupt flags on Quadra:
				 *
				 * Bit 0+1: some interrupt flags
				 * Bit 2+3: some interrupt enable
				 * Bit 4:   ??
				 * Bit 5:   IDE interrupt flag (any hwif)
				 * Bit 6:   maybe IDE interrupt enable (any hwif) ??
				 * Bit 7:   Any interrupt condition
				 */

volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);

int macide_ack_intr(ide_hwif_t* hwif)
{
	if (*ide_ifr & 0x20) {
		*ide_ifr &= ~0x20;
		return 1;
	}
	return 0;
}

static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
				      int irq, ide_ack_intr_t *ack_intr)
{
	int i;

	memset(hw, 0, sizeof(*hw));

	for (i = 0; i < 8; i++)
		hw->io_ports[i] = base + i * 4;

	hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL;

	hw->irq = irq;
	hw->ack_intr = ack_intr;
}

static const char *mac_ide_name[] =
	{ "Quadra", "Powerbook", "Powerbook Baboon" };

/*
 * Probe for a Macintosh IDE interface
 */

static int __init macide_init(void)
{
	ide_hwif_t *hwif;
	ide_ack_intr_t *ack_intr;
	unsigned long base;
	int irq;
	hw_regs_t hw;

	switch (macintosh_config->ide_type) {
	case MAC_IDE_QUADRA:
		base = IDE_BASE;
		ack_intr = macide_ack_intr;
		irq = IRQ_NUBUS_F;
		break;
	case MAC_IDE_PB:
		base = IDE_BASE;
		ack_intr = macide_ack_intr;
		irq = IRQ_NUBUS_C;
		break;
	case MAC_IDE_BABOON:
		base = BABOON_BASE;
		ack_intr = NULL;
		irq = IRQ_BABOON_1;
		break;
	default:
		return -ENODEV;
	}

	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
			 mac_ide_name[macintosh_config->ide_type - 1]);

	macide_setup_ports(&hw, base, irq, ack_intr);

	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
	if (hwif) {
		u8 index = hwif->index;
		u8 idx[4] = { index, 0xff, 0xff, 0xff };

		ide_init_port_data(hwif, index);
		ide_init_port_hw(hwif, &hw);

		hwif->mmio = 1;

		ide_device_add(idx, NULL);
	}

	return 0;
}

module_init(macide_init);
Commit	Line	Data
1da177e4	1	/*
58f189fc	2	* Macintosh IDE Driver
1da177e4 LT	3	*
	4	* Copyright (C) 1998 by Michael Schmitz
	5	*
	6	* This driver was written based on information obtained from the MacOS IDE
	7	* driver binary by Mikael Forselius
	8	*
	9	* This file is subject to the terms and conditions of the GNU General Public
	10	* License. See the file COPYING in the main directory of this archive for
	11	* more details.
	12	*/
	13
1da177e4 LT	14	#include <linux/types.h>
	15	#include <linux/mm.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/blkdev.h>
	18	#include <linux/hdreg.h>
	19	#include <linux/delay.h>
	20	#include <linux/ide.h>
	21
	22	#include <asm/machw.h>
	23	#include <asm/macintosh.h>
	24	#include <asm/macints.h>
	25	#include <asm/mac_baboon.h>
	26
	27	#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
	28
	29	/*
	30	* Generic IDE registers as offsets from the base
	31	* These match MkLinux so they should be correct.
	32	*/
	33
1da177e4 LT	34	#define IDE_CONTROL 0x38 /* control/altstatus */
	35
	36	/*
	37	* Mac-specific registers
	38	*/
	39
	40	/*
	41	* this register is odd; it doesn't seem to do much and it's
	42	* not word-aligned like virtually every other hardware register
	43	* on the Mac...
	44	*/
	45
	46	#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
	47	*
	48	* Bit 0+1: some interrupt flags
	49	* Bit 2+3: some interrupt enable
	50	* Bit 4: ??
	51	* Bit 5: IDE interrupt flag (any hwif)
	52	* Bit 6: maybe IDE interrupt enable (any hwif) ??
	53	* Bit 7: Any interrupt condition
	54	*/
	55
	56	volatile unsigned char ide_ifr = (unsigned char ) (IDE_BASE + IDE_IFR);
	57
1da177e4 LT	58	int macide_ack_intr(ide_hwif_t* hwif)
	59	{
	60	if (*ide_ifr & 0x20) {
	61	*ide_ifr &= ~0x20;
	62	return 1;
	63	}
	64	return 0;
	65	}
	66
29dd5975 BZ	67	static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
	68	int irq, ide_ack_intr_t *ack_intr)
	69	{
	70	int i;
	71
	72	memset(hw, 0, sizeof(*hw));
	73
	74	for (i = 0; i < 8; i++)
	75	hw->io_ports[i] = base + i * 4;
	76
899e1bc5	77	hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL;
29dd5975 BZ	78
	79	hw->irq = irq;
	80	hw->ack_intr = ack_intr;
	81	}
	82
c99c92c5 BZ	83	static const char *mac_ide_name[] =
	84	{ "Quadra", "Powerbook", "Powerbook Baboon" };
	85
1da177e4 LT	86	/*
	87	* Probe for a Macintosh IDE interface
	88	*/
	89
ade2daf9	90	static int __init macide_init(void)
1da177e4	91	{
1da177e4	92	ide_hwif_t *hwif;
29dd5975 BZ	93	ide_ack_intr_t *ack_intr;
	94	unsigned long base;
	95	int irq;
	96	hw_regs_t hw;
1da177e4 LT	97
	98	switch (macintosh_config->ide_type) {
	99	case MAC_IDE_QUADRA:
29dd5975 BZ	100	base = IDE_BASE;
	101	ack_intr = macide_ack_intr;
	102	irq = IRQ_NUBUS_F;
1da177e4 LT	103	break;
1da177e4 LT	104	case MAC_IDE_PB:
29dd5975 BZ	105	base = IDE_BASE;
	106	ack_intr = macide_ack_intr;
	107	irq = IRQ_NUBUS_C;
1da177e4 LT	108	break;
1da177e4 LT	109	case MAC_IDE_BABOON:
29dd5975 BZ	110	base = BABOON_BASE;
	111	ack_intr = NULL;
	112	irq = IRQ_BABOON_1;
cbb010c1 BZ	113	break;
cbb010c1 BZ	114	default:
ade2daf9	115	return -ENODEV;
cbb010c1	116	}
1da177e4	117
c99c92c5 BZ	118	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
	119	mac_ide_name[macintosh_config->ide_type - 1]);
	120
29dd5975 BZ	121	macide_setup_ports(&hw, base, irq, ack_intr);
29dd5975 BZ	122
cbb010c1 BZ	123	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
	124	if (hwif) {
	125	u8 index = hwif->index;
8ac4ce74	126	u8 idx[4] = { index, 0xff, 0xff, 0xff };
cbb010c1 BZ	127
	128	ide_init_port_data(hwif, index);
	129	ide_init_port_hw(hwif, &hw);
	130
2ad1e558	131	hwif->mmio = 1;
8ac4ce74	132
c413b9b9	133	ide_device_add(idx, NULL);
1da177e4	134	}
ade2daf9 BZ	135
ade2daf9 BZ	136	return 0;
1da177e4	137	}
ade2daf9 BZ	138
ade2daf9 BZ	139	module_init(macide_init);