142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
/*
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* 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/delay.h>
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#include <linux/ide.h>
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#include <linux/module.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_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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int macide_test_irq(ide_hwif_t *hwif)
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{
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if (*ide_ifr & 0x20)
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return 1;
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return 0;
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}
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static void macide_clear_irq(ide_drive_t *drive)
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{
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*ide_ifr &= ~0x20;
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}
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static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
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int irq)
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{
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int i;
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memset(hw, 0, sizeof(*hw));
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for (i = 0; i < 8; i++)
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hw->io_ports_array[i] = base + i * 4;
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hw->io_ports.ctl_addr = base + IDE_CONTROL;
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hw->irq = irq;
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}
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static const struct ide_port_ops macide_port_ops = {
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.clear_irq = macide_clear_irq,
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.test_irq = macide_test_irq,
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};
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static const struct ide_port_info macide_port_info = {
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.port_ops = &macide_port_ops,
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.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
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.irq_flags = IRQF_SHARED,
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.chipset = ide_generic,
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};
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static const char *mac_ide_name[] =
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{ "Quadra", "Powerbook", "Powerbook Baboon" };
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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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unsigned long base;
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int irq;
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struct ide_hw hw, *hws[] = { &hw };
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struct ide_port_info d = macide_port_info;
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if (!MACH_IS_MAC)
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return -ENODEV;
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switch (macintosh_config->ide_type) {
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case MAC_IDE_QUADRA:
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base = IDE_BASE;
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irq = IRQ_NUBUS_F;
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break;
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case MAC_IDE_PB:
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base = IDE_BASE;
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irq = IRQ_NUBUS_C;
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break;
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case MAC_IDE_BABOON:
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base = BABOON_BASE;
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d.port_ops = NULL;
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irq = 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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printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
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mac_ide_name[macintosh_config->ide_type - 1]);
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macide_setup_ports(&hw, base, irq);
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return ide_host_add(&d, hws, 1, NULL);
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}
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module_init(macide_init);
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MODULE_LICENSE("GPL");
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