| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | #include <linux/module.h> |
| 21 | |
| 22 | #include <asm/macintosh.h> |
| 23 | #include <asm/macints.h> |
| 24 | #include <asm/mac_baboon.h> |
| 25 | |
| 26 | #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ |
| 27 | |
| 28 | /* |
| 29 | * Generic IDE registers as offsets from the base |
| 30 | * These match MkLinux so they should be correct. |
| 31 | */ |
| 32 | |
| 33 | #define IDE_CONTROL 0x38 /* control/altstatus */ |
| 34 | |
| 35 | /* |
| 36 | * Mac-specific registers |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * this register is odd; it doesn't seem to do much and it's |
| 41 | * not word-aligned like virtually every other hardware register |
| 42 | * on the Mac... |
| 43 | */ |
| 44 | |
| 45 | #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: |
| 46 | * |
| 47 | * Bit 0+1: some interrupt flags |
| 48 | * Bit 2+3: some interrupt enable |
| 49 | * Bit 4: ?? |
| 50 | * Bit 5: IDE interrupt flag (any hwif) |
| 51 | * Bit 6: maybe IDE interrupt enable (any hwif) ?? |
| 52 | * Bit 7: Any interrupt condition |
| 53 | */ |
| 54 | |
| 55 | volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); |
| 56 | |
| 57 | int macide_test_irq(ide_hwif_t *hwif) |
| 58 | { |
| 59 | if (*ide_ifr & 0x20) |
| 60 | return 1; |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static void macide_clear_irq(ide_drive_t *drive) |
| 65 | { |
| 66 | *ide_ifr &= ~0x20; |
| 67 | } |
| 68 | |
| 69 | static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, |
| 70 | int irq) |
| 71 | { |
| 72 | int i; |
| 73 | |
| 74 | memset(hw, 0, sizeof(*hw)); |
| 75 | |
| 76 | for (i = 0; i < 8; i++) |
| 77 | hw->io_ports_array[i] = base + i * 4; |
| 78 | |
| 79 | hw->io_ports.ctl_addr = base + IDE_CONTROL; |
| 80 | |
| 81 | hw->irq = irq; |
| 82 | } |
| 83 | |
| 84 | static const struct ide_port_ops macide_port_ops = { |
| 85 | .clear_irq = macide_clear_irq, |
| 86 | .test_irq = macide_test_irq, |
| 87 | }; |
| 88 | |
| 89 | static const struct ide_port_info macide_port_info = { |
| 90 | .port_ops = &macide_port_ops, |
| 91 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, |
| 92 | .irq_flags = IRQF_SHARED, |
| 93 | .chipset = ide_generic, |
| 94 | }; |
| 95 | |
| 96 | static const char *mac_ide_name[] = |
| 97 | { "Quadra", "Powerbook", "Powerbook Baboon" }; |
| 98 | |
| 99 | /* |
| 100 | * Probe for a Macintosh IDE interface |
| 101 | */ |
| 102 | |
| 103 | static int __init macide_init(void) |
| 104 | { |
| 105 | unsigned long base; |
| 106 | int irq; |
| 107 | struct ide_hw hw, *hws[] = { &hw }; |
| 108 | struct ide_port_info d = macide_port_info; |
| 109 | |
| 110 | if (!MACH_IS_MAC) |
| 111 | return -ENODEV; |
| 112 | |
| 113 | switch (macintosh_config->ide_type) { |
| 114 | case MAC_IDE_QUADRA: |
| 115 | base = IDE_BASE; |
| 116 | irq = IRQ_NUBUS_F; |
| 117 | break; |
| 118 | case MAC_IDE_PB: |
| 119 | base = IDE_BASE; |
| 120 | irq = IRQ_NUBUS_C; |
| 121 | break; |
| 122 | case MAC_IDE_BABOON: |
| 123 | base = BABOON_BASE; |
| 124 | d.port_ops = NULL; |
| 125 | irq = IRQ_BABOON_1; |
| 126 | break; |
| 127 | default: |
| 128 | return -ENODEV; |
| 129 | } |
| 130 | |
| 131 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
| 132 | mac_ide_name[macintosh_config->ide_type - 1]); |
| 133 | |
| 134 | macide_setup_ports(&hw, base, irq); |
| 135 | |
| 136 | return ide_host_add(&d, hws, 1, NULL); |
| 137 | } |
| 138 | |
| 139 | module_init(macide_init); |
| 140 | |
| 141 | MODULE_LICENSE("GPL"); |