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

/*
 *  linux/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_DATA	0x00
#define IDE_ERROR	0x04	/* see err-bits */
#define IDE_NSECTOR	0x08	/* nr of sectors to read/write */
#define IDE_SECTOR	0x0c	/* starting sector */
#define IDE_LCYL	0x10	/* starting cylinder */
#define IDE_HCYL	0x14	/* high byte of starting cyl */
#define IDE_SELECT	0x18	/* 101dhhhh , d=drive, hhhh=head */
#define IDE_STATUS	0x1c	/* see status-bits */
#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);

static int macide_offsets[IDE_NR_PORTS] = {
    IDE_DATA, IDE_ERROR,  IDE_NSECTOR, IDE_SECTOR, IDE_LCYL,
    IDE_HCYL, IDE_SELECT, IDE_STATUS,  IDE_CONTROL
};

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

/*
 * Probe for a Macintosh IDE interface
 */

void __init macide_init(void)
{
	hw_regs_t hw;
	ide_hwif_t *hwif;

	switch (macintosh_config->ide_type) {
	case MAC_IDE_QUADRA:
		ide_setup_ports(&hw, IDE_BASE, macide_offsets,
				0, 0, macide_ack_intr,
//				quadra_ide_iops,
				IRQ_NUBUS_F);
		break;
	case MAC_IDE_PB:
		ide_setup_ports(&hw, IDE_BASE, macide_offsets,
				0, 0, macide_ack_intr,
//				macide_pb_iops,
				IRQ_NUBUS_C);
		break;
	case MAC_IDE_BABOON:
		ide_setup_ports(&hw, BABOON_BASE, macide_offsets,
				0, 0, NULL,
//				macide_baboon_iops,
				IRQ_BABOON_1);
		break;
	default:
		return;
	}

	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);

		if (macintosh_config->ide_type == MAC_IDE_BABOON &&
		    macintosh_config->ident == MAC_MODEL_PB190) {
			/* Fix breakage in ide-disk.c: drive capacity	*/
			/* is not initialized for drives without a 	*/
			/* hardware ID, and we can't get that without	*/
			/* probing the drive which freezes a 190.	*/
			ide_drive_t *drive = &hwif->drives[0];
			drive->capacity64 = drive->cyl*drive->head*drive->sect;
		}

		hwif->mmio = 1;
		if (macintosh_config->ide_type == MAC_IDE_QUADRA)
			printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index);
		else if (macintosh_config->ide_type == MAC_IDE_PB)
			printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index);
		else if (macintosh_config->ide_type == MAC_IDE_BABOON)
			printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
		else
			printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index);

		ide_device_add(idx);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/ide/legacy/macide.c -- Macintosh IDE Driver
	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
	34	#define IDE_DATA 0x00
	35	#define IDE_ERROR 0x04 /* see err-bits */
	36	#define IDE_NSECTOR 0x08 /* nr of sectors to read/write */
	37	#define IDE_SECTOR 0x0c /* starting sector */
	38	#define IDE_LCYL 0x10 /* starting cylinder */
	39	#define IDE_HCYL 0x14 /* high byte of starting cyl */
	40	#define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */
	41	#define IDE_STATUS 0x1c /* see status-bits */
	42	#define IDE_CONTROL 0x38 /* control/altstatus */
	43
	44	/*
	45	* Mac-specific registers
	46	*/
	47
	48	/*
	49	* this register is odd; it doesn't seem to do much and it's
	50	* not word-aligned like virtually every other hardware register
	51	* on the Mac...
	52	*/
	53
	54	#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
	55	*
	56	* Bit 0+1: some interrupt flags
	57	* Bit 2+3: some interrupt enable
	58	* Bit 4: ??
	59	* Bit 5: IDE interrupt flag (any hwif)
	60	* Bit 6: maybe IDE interrupt enable (any hwif) ??
	61	* Bit 7: Any interrupt condition
	62	*/
	63
	64	volatile unsigned char ide_ifr = (unsigned char ) (IDE_BASE + IDE_IFR);
	65
	66	static int macide_offsets[IDE_NR_PORTS] = {
	67	IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL,
	68	IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL
	69	};
	70
	71	int macide_ack_intr(ide_hwif_t* hwif)
	72	{
	73	if (*ide_ifr & 0x20) {
	74	*ide_ifr &= ~0x20;
	75	return 1;
	76	}
	77	return 0;
78	}
79
1da177e4 LT	80	/*
	81	* Probe for a Macintosh IDE interface
	82	*/
	83
355bd12f	84	void __init macide_init(void)
1da177e4 LT	85	{
	86	hw_regs_t hw;
	87	ide_hwif_t *hwif;
1da177e4 LT	88
	89	switch (macintosh_config->ide_type) {
	90	case MAC_IDE_QUADRA:
	91	ide_setup_ports(&hw, IDE_BASE, macide_offsets,
	92	0, 0, macide_ack_intr,
	93	// quadra_ide_iops,
	94	IRQ_NUBUS_F);
1da177e4 LT	95	break;
	96	case MAC_IDE_PB:
	97	ide_setup_ports(&hw, IDE_BASE, macide_offsets,
	98	0, 0, macide_ack_intr,
	99	// macide_pb_iops,
	100	IRQ_NUBUS_C);
1da177e4 LT	101	break;
	102	case MAC_IDE_BABOON:
	103	ide_setup_ports(&hw, BABOON_BASE, macide_offsets,
	104	0, 0, NULL,
	105	// macide_baboon_iops,
	106	IRQ_BABOON_1);
cbb010c1 BZ	107	break;
	108	default:
	109	return;
	110	}
1da177e4	111
cbb010c1 BZ	112	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
	113	if (hwif) {
	114	u8 index = hwif->index;
8ac4ce74	115	u8 idx[4] = { index, 0xff, 0xff, 0xff };
cbb010c1 BZ	116
	117	ide_init_port_data(hwif, index);
	118	ide_init_port_hw(hwif, &hw);
	119
	120	if (macintosh_config->ide_type == MAC_IDE_BABOON &&
	121	macintosh_config->ident == MAC_MODEL_PB190) {
1da177e4 LT	122	/* Fix breakage in ide-disk.c: drive capacity */
	123	/* is not initialized for drives without a */
	124	/* hardware ID, and we can't get that without */
	125	/* probing the drive which freezes a 190. */
cbb010c1	126	ide_drive_t *drive = &hwif->drives[0];
1da177e4	127	drive->capacity64 = drive->cyldrive->headdrive->sect;
1da177e4	128	}
1da177e4	129
2ad1e558	130	hwif->mmio = 1;
1da177e4 LT	131	if (macintosh_config->ide_type == MAC_IDE_QUADRA)
	132	printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index);
	133	else if (macintosh_config->ide_type == MAC_IDE_PB)
	134	printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index);
	135	else if (macintosh_config->ide_type == MAC_IDE_BABOON)
	136	printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
	137	else
	138	printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index);
8ac4ce74 BZ	139
8ac4ce74 BZ	140	ide_device_add(idx);
1da177e4 LT	141	}
1da177e4 LT	142	}