/* *  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 <linux/module.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_test_irq(ide_hwif_t *hwif){	if (*ide_ifr & 0x20)		return 1;	return 0;} static void macide_clear_irq(ide_drive_t *drive){	*ide_ifr &= ~0x20;} static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,				      int irq){	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;} static const struct ide_port_ops macide_port_ops = {	.clear_irq		= macide_clear_irq,	.test_irq		= macide_test_irq,}; static const struct ide_port_info macide_port_info = {	.port_ops		= &macide_port_ops,	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,	.irq_flags		= IRQF_SHARED,	.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){	unsigned long base;	int irq;	struct ide_hw hw, *hws[] = { &hw };	struct ide_port_info d = macide_port_info; 	if (!MACH_IS_MAC)		return -ENODEV; 	switch (macintosh_config->ide_type) {	case MAC_IDE_QUADRA:		base = IDE_BASE;		irq = IRQ_NUBUS_F;		break;	case MAC_IDE_PB:		base = IDE_BASE;		irq = IRQ_NUBUS_C;		break;	case MAC_IDE_BABOON:		base = BABOON_BASE;		d.port_ops = 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); 	return ide_host_add(&d, hws, 1, NULL);} module_init(macide_init); MODULE_LICENSE("GPL");