147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/*
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* linux/drivers/ide/legacy/macide.c -- Macintosh IDE Driver
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*
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* Copyright (C) 1998 by Michael Schmitz
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*
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* This driver was written based on information obtained from the MacOS IDE
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* driver binary by Mikael Forselius
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/blkdev.h>
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#include <linux/hdreg.h>
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#include <linux/delay.h>
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#include <linux/ide.h>
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#include <asm/machw.h>
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#include <asm/macintosh.h>
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#include <asm/macints.h>
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#include <asm/mac_baboon.h>
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#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
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/*
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* Generic IDE registers as offsets from the base
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* These match MkLinux so they should be correct.
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*/
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#define IDE_DATA 0x00
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#define IDE_ERROR 0x04 /* see err-bits */
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#define IDE_NSECTOR 0x08 /* nr of sectors to read/write */
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#define IDE_SECTOR 0x0c /* starting sector */
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#define IDE_LCYL 0x10 /* starting cylinder */
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#define IDE_HCYL 0x14 /* high byte of starting cyl */
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#define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */
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#define IDE_STATUS 0x1c /* see status-bits */
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#define IDE_CONTROL 0x38 /* control/altstatus */
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/*
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* Mac-specific registers
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*/
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/*
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* this register is odd; it doesn't seem to do much and it's
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* not word-aligned like virtually every other hardware register
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* on the Mac...
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*/
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#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
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*
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* Bit 0+1: some interrupt flags
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* Bit 2+3: some interrupt enable
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* Bit 4: ??
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* Bit 5: IDE interrupt flag (any hwif)
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* Bit 6: maybe IDE interrupt enable (any hwif) ??
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* Bit 7: Any interrupt condition
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*/
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volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
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static int macide_offsets[IDE_NR_PORTS] = {
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IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL,
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IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL
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};
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int macide_ack_intr(ide_hwif_t* hwif)
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{
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if (*ide_ifr & 0x20) {
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*ide_ifr &= ~0x20;
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return 1;
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}
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return 0;
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}
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/*
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* Probe for a Macintosh IDE interface
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*/
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static int __init macide_init(void)
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{
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hw_regs_t hw;
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ide_hwif_t *hwif;
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switch (macintosh_config->ide_type) {
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case MAC_IDE_QUADRA:
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ide_setup_ports(&hw, IDE_BASE, macide_offsets,
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0, 0, macide_ack_intr,
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// quadra_ide_iops,
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IRQ_NUBUS_F);
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break;
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case MAC_IDE_PB:
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ide_setup_ports(&hw, IDE_BASE, macide_offsets,
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0, 0, macide_ack_intr,
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// macide_pb_iops,
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IRQ_NUBUS_C);
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break;
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case MAC_IDE_BABOON:
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ide_setup_ports(&hw, BABOON_BASE, macide_offsets,
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0, 0, NULL,
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// macide_baboon_iops,
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IRQ_BABOON_1);
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break;
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default:
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return -ENODEV;
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}
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hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
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if (hwif) {
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u8 index = hwif->index;
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u8 idx[4] = { index, 0xff, 0xff, 0xff };
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ide_init_port_data(hwif, index);
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ide_init_port_hw(hwif, &hw);
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if (macintosh_config->ide_type == MAC_IDE_BABOON &&
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macintosh_config->ident == MAC_MODEL_PB190) {
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/* Fix breakage in ide-disk.c: drive capacity */
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/* is not initialized for drives without a */
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/* hardware ID, and we can't get that without */
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/* probing the drive which freezes a 190. */
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ide_drive_t *drive = &hwif->drives[0];
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drive->capacity64 = drive->cyl*drive->head*drive->sect;
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}
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hwif->mmio = 1;
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if (macintosh_config->ide_type == MAC_IDE_QUADRA)
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printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index);
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else if (macintosh_config->ide_type == MAC_IDE_PB)
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printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index);
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else if (macintosh_config->ide_type == MAC_IDE_BABOON)
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printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
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else
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printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index);
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ide_device_add(idx);
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}
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return 0;
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}
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module_init(macide_init);
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