1/* 2 * linux/drivers/ide/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 14#include <linux/config.h> 15#include <linux/types.h> 16#include <linux/mm.h> 17#include <linux/interrupt.h> 18#include <linux/blkdev.h> 19#include <linux/hdreg.h> 20#include <linux/delay.h> 21#include <linux/ide.h> 22 23#include <asm/machw.h> 24#include <asm/macintosh.h> 25#include <asm/macints.h> 26#include <asm/mac_baboon.h> 27 28#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ 29 30/* 31 * Generic IDE registers as offsets from the base 32 * These match MkLinux so they should be correct. 33 */ 34 35#define IDE_DATA 0x00 36#define IDE_ERROR 0x04 /* see err-bits */ 37#define IDE_NSECTOR 0x08 /* nr of sectors to read/write */ 38#define IDE_SECTOR 0x0c /* starting sector */ 39#define IDE_LCYL 0x10 /* starting cylinder */ 40#define IDE_HCYL 0x14 /* high byte of starting cyl */ 41#define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */ 42#define IDE_STATUS 0x1c /* see status-bits */ 43#define IDE_CONTROL 0x38 /* control/altstatus */ 44 45/* 46 * Mac-specific registers 47 */ 48 49/* 50 * this register is odd; it doesn't seem to do much and it's 51 * not word-aligned like virtually every other hardware register 52 * on the Mac... 53 */ 54 55#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: 56 * 57 * Bit 0+1: some interrupt flags 58 * Bit 2+3: some interrupt enable 59 * Bit 4: ?? 60 * Bit 5: IDE interrupt flag (any hwif) 61 * Bit 6: maybe IDE interrupt enable (any hwif) ?? 62 * Bit 7: Any interrupt condition 63 */ 64 65volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); 66 67static int macide_offsets[IDE_NR_PORTS] = { 68 IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL, 69 IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL 70}; 71 72int macide_ack_intr(ide_hwif_t* hwif) 73{ 74 if (*ide_ifr & 0x20) { 75 *ide_ifr &= ~0x20; 76 return 1; 77 } 78 return 0; 79} 80 81#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY 82static void macide_mediabay_interrupt(int irq, void *dev_id, struct pt_regs *regs) 83{ 84 int state = baboon->mb_status & 0x04; 85 86 printk("macide: media bay %s detected\n", state? "removal":"insertion"); 87} 88#endif 89 90/* 91 * Probe for a Macintosh IDE interface 92 */ 93 94void macide_init(void) 95{ 96 hw_regs_t hw; 97 int index = -1; 98 99 switch (macintosh_config->ide_type) { 100 case MAC_IDE_QUADRA: 101 ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets, 102 0, 0, macide_ack_intr, IRQ_NUBUS_F); 103 index = ide_register_hw(&hw, NULL); 104 break; 105 case MAC_IDE_PB: 106 ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets, 107 0, 0, macide_ack_intr, IRQ_NUBUS_C); 108 index = ide_register_hw(&hw, NULL); 109 break; 110 case MAC_IDE_BABOON: 111 ide_setup_ports(&hw, (ide_ioreg_t)BABOON_BASE, macide_offsets, 112 0, 0, NULL, IRQ_BABOON_1); 113 index = ide_register_hw(&hw, NULL); 114 if (index == -1) break; 115 if (macintosh_config->ident == MAC_MODEL_PB190) { 116 117 /* Fix breakage in ide-disk.c: drive capacity */ 118 /* is not initialized for drives without a */ 119 /* hardware ID, and we cna't get that without */ 120 /* probing the drive which freezes a 190. */ 121 122 ide_drive_t *drive = &ide_hwifs[index].drives[0]; 123 drive->capacity = drive->cyl*drive->head*drive->sect; 124 125#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY 126 request_irq(IRQ_BABOON_2, macide_mediabay_interrupt, 127 IRQ_FLG_FAST, "mediabay", 128 macide_mediabay_interrupt); 129#endif 130 } 131 break; 132 133 default: 134 return; 135 } 136 137 if (index != -1) { 138 if (macintosh_config->ide_type == MAC_IDE_QUADRA) 139 printk("ide%d: Macintosh Quadra IDE interface\n", index); 140 else if (macintosh_config->ide_type == MAC_IDE_PB) 141 printk("ide%d: Macintosh Powerbook IDE interface\n", index); 142 else if (macintosh_config->ide_type == MAC_IDE_BABOON) 143 printk("ide%d: Macintosh Powerbook Baboon IDE interface\n", index); 144 else 145 printk("ide%d: Unknown Macintosh IDE interface\n", index); 146 } 147} 148