1/* 2 * 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 14#include <linux/types.h> 15#include <linux/mm.h> 16#include <linux/interrupt.h> 17#include <linux/blkdev.h> 18#include <linux/delay.h> 19#include <linux/ide.h> 20 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 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 54volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); 55 56int macide_test_irq(ide_hwif_t *hwif) 57{ 58 if (*ide_ifr & 0x20) 59 return 1; 60 return 0; 61} 62 63static void macide_clear_irq(ide_drive_t *drive) 64{ 65 *ide_ifr &= ~0x20; 66} 67 68static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, 69 int irq) 70{ 71 int i; 72 73 memset(hw, 0, sizeof(*hw)); 74 75 for (i = 0; i < 8; i++) 76 hw->io_ports_array[i] = base + i * 4; 77 78 hw->io_ports.ctl_addr = base + IDE_CONTROL; 79 80 hw->irq = irq; 81} 82 83static const struct ide_port_ops macide_port_ops = { 84 .clear_irq = macide_clear_irq, 85 .test_irq = macide_test_irq, 86}; 87 88static const struct ide_port_info macide_port_info = { 89 .port_ops = &macide_port_ops, 90 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, 91 .irq_flags = IRQF_SHARED, 92 .chipset = ide_generic, 93}; 94 95static const char *mac_ide_name[] = 96 { "Quadra", "Powerbook", "Powerbook Baboon" }; 97 98/* 99 * Probe for a Macintosh IDE interface 100 */ 101 102static int __init macide_init(void) 103{ 104 unsigned long base; 105 int irq; 106 struct ide_hw hw, *hws[] = { &hw }; 107 struct ide_port_info d = macide_port_info; 108 109 if (!MACH_IS_MAC) 110 return -ENODEV; 111 112 switch (macintosh_config->ide_type) { 113 case MAC_IDE_QUADRA: 114 base = IDE_BASE; 115 irq = IRQ_NUBUS_F; 116 break; 117 case MAC_IDE_PB: 118 base = IDE_BASE; 119 irq = IRQ_NUBUS_C; 120 break; 121 case MAC_IDE_BABOON: 122 base = BABOON_BASE; 123 d.port_ops = NULL; 124 irq = IRQ_BABOON_1; 125 break; 126 default: 127 return -ENODEV; 128 } 129 130 printk(KERN_INFO "ide: Macintosh %s IDE controller\n", 131 mac_ide_name[macintosh_config->ide_type - 1]); 132 133 macide_setup_ports(&hw, base, irq); 134 135 return ide_host_add(&d, hws, 1, NULL); 136} 137 138module_init(macide_init); 139 140MODULE_LICENSE("GPL"); 141