[deliverable/linux.git] / drivers / ide / 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/delay.h>
#include <linux/ide.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_array[i] = base + i * 4;

	hw->io_ports.ctl_addr = base + IDE_CONTROL;

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

	hw->chipset = ide_generic;
}

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

/*
 * Probe for a Macintosh IDE interface
 */

static int __init macide_init(void)
{
	ide_ack_intr_t *ack_intr;
	unsigned long base;
	int irq;
	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };

	if (!MACH_IS_MAC)
		return -ENODEV;

	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);

	return ide_host_add(NULL, hws, NULL);
}

module_init(macide_init);

MODULE_LICENSE("GPL");
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>
1da177e4 LT	18	#include <linux/delay.h>
	19	#include <linux/ide.h>
	20
1da177e4 LT	21	#include <asm/macintosh.h>
	22	#include <asm/macints.h>
	23	#include <asm/mac_baboon.h>
	24
	25	#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
	26
	27	/*
	28	* Generic IDE registers as offsets from the base
	29	* These match MkLinux so they should be correct.
	30	*/
	31
1da177e4 LT	32	#define IDE_CONTROL 0x38 /* control/altstatus */
	33
	34	/*
	35	* Mac-specific registers
	36	*/
	37
	38	/*
	39	* this register is odd; it doesn't seem to do much and it's
	40	* not word-aligned like virtually every other hardware register
	41	* on the Mac...
	42	*/
	43
	44	#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
	45	*
	46	* Bit 0+1: some interrupt flags
	47	* Bit 2+3: some interrupt enable
	48	* Bit 4: ??
	49	* Bit 5: IDE interrupt flag (any hwif)
	50	* Bit 6: maybe IDE interrupt enable (any hwif) ??
	51	* Bit 7: Any interrupt condition
	52	*/
	53
	54	volatile unsigned char ide_ifr = (unsigned char ) (IDE_BASE + IDE_IFR);
	55
1da177e4 LT	56	int macide_ack_intr(ide_hwif_t* hwif)
	57	{
	58	if (*ide_ifr & 0x20) {
	59	*ide_ifr &= ~0x20;
	60	return 1;
	61	}
	62	return 0;
	63	}
	64
29dd5975 BZ	65	static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
	66	int irq, ide_ack_intr_t *ack_intr)
	67	{
	68	int i;
	69
	70	memset(hw, 0, sizeof(*hw));
	71
	72	for (i = 0; i < 8; i++)
4c3032d8	73	hw->io_ports_array[i] = base + i * 4;
29dd5975	74
4c3032d8	75	hw->io_ports.ctl_addr = base + IDE_CONTROL;
29dd5975 BZ	76
	77	hw->irq = irq;
	78	hw->ack_intr = ack_intr;
d427e836 BZ	79
d427e836 BZ	80	hw->chipset = ide_generic;
29dd5975 BZ	81	}
29dd5975 BZ	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	{
29dd5975 BZ	92	ide_ack_intr_t *ack_intr;
	93	unsigned long base;
	94	int irq;
c97c6aca	95	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
1da177e4	96
3ce92a2a GU	97	if (!MACH_IS_MAC)
	98	return -ENODEV;
	99
1da177e4 LT	100	switch (macintosh_config->ide_type) {
1da177e4 LT	101	case MAC_IDE_QUADRA:
29dd5975 BZ	102	base = IDE_BASE;
	103	ack_intr = macide_ack_intr;
	104	irq = IRQ_NUBUS_F;
1da177e4 LT	105	break;
1da177e4 LT	106	case MAC_IDE_PB:
29dd5975 BZ	107	base = IDE_BASE;
	108	ack_intr = macide_ack_intr;
	109	irq = IRQ_NUBUS_C;
1da177e4 LT	110	break;
1da177e4 LT	111	case MAC_IDE_BABOON:
29dd5975 BZ	112	base = BABOON_BASE;
	113	ack_intr = NULL;
	114	irq = IRQ_BABOON_1;
cbb010c1 BZ	115	break;
cbb010c1 BZ	116	default:
ade2daf9	117	return -ENODEV;
cbb010c1	118	}
1da177e4	119
c99c92c5 BZ	120	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
	121	mac_ide_name[macintosh_config->ide_type - 1]);
	122
29dd5975 BZ	123	macide_setup_ports(&hw, base, irq, ack_intr);
29dd5975 BZ	124
6f904d01	125	return ide_host_add(NULL, hws, NULL);
1da177e4	126	}
ade2daf9 BZ	127
ade2daf9 BZ	128	module_init(macide_init);
37c807a2 AB	129
37c807a2 AB	130	MODULE_LICENSE("GPL");