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#include <linux/platform_device.h> 22 23#include <asm/macintosh.h> 24 25#define DRV_NAME "mac_ide" 26 27#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ 28 29/* 30 * Generic IDE registers as offsets from the base 31 * These match MkLinux so they should be correct. 32 */ 33 34#define IDE_CONTROL 0x38 /* control/altstatus */ 35 36/* 37 * Mac-specific registers 38 */ 39 40/* 41 * this register is odd; it doesn't seem to do much and it's 42 * not word-aligned like virtually every other hardware register 43 * on the Mac... 44 */ 45 46#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: 47 * 48 * Bit 0+1: some interrupt flags 49 * Bit 2+3: some interrupt enable 50 * Bit 4: ?? 51 * Bit 5: IDE interrupt flag (any hwif) 52 * Bit 6: maybe IDE interrupt enable (any hwif) ?? 53 * Bit 7: Any interrupt condition 54 */ 55 56volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); 57 58int macide_test_irq(ide_hwif_t *hwif) 59{ 60 if (*ide_ifr & 0x20) 61 return 1; 62 return 0; 63} 64 65static void macide_clear_irq(ide_drive_t *drive) 66{ 67 *ide_ifr &= ~0x20; 68} 69 70static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, 71 int irq) 72{ 73 int i; 74 75 memset(hw, 0, sizeof(*hw)); 76 77 for (i = 0; i < 8; i++) 78 hw->io_ports_array[i] = base + i * 4; 79 80 hw->io_ports.ctl_addr = base + IDE_CONTROL; 81 82 hw->irq = irq; 83} 84 85static const struct ide_port_ops macide_port_ops = { 86 .clear_irq = macide_clear_irq, 87 .test_irq = macide_test_irq, 88}; 89 90static const struct ide_port_info macide_port_info = { 91 .port_ops = &macide_port_ops, 92 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, 93 .irq_flags = IRQF_SHARED, 94 .chipset = ide_generic, 95}; 96 97static const char *mac_ide_name[] = 98 { "Quadra", "Powerbook", "Powerbook Baboon" }; 99 100/* 101 * Probe for a Macintosh IDE interface 102 */ 103 104static int mac_ide_probe(struct platform_device *pdev) 105{ 106 struct resource *mem, *irq; 107 struct ide_hw hw, *hws[] = { &hw }; 108 struct ide_port_info d = macide_port_info; 109 struct ide_host *host; 110 int rc; 111 112 if (!MACH_IS_MAC) 113 return -ENODEV; 114 115 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 116 if (!mem) 117 return -ENODEV; 118 119 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 120 if (!irq) 121 return -ENODEV; 122 123 if (!devm_request_mem_region(&pdev->dev, mem->start, 124 resource_size(mem), DRV_NAME)) { 125 dev_err(&pdev->dev, "resources busy\n"); 126 return -EBUSY; 127 } 128 129 printk(KERN_INFO "ide: Macintosh %s IDE controller\n", 130 mac_ide_name[macintosh_config->ide_type - 1]); 131 132 macide_setup_ports(&hw, mem->start, irq->start); 133 134 rc = ide_host_add(&d, hws, 1, &host); 135 if (rc) 136 return rc; 137 138 platform_set_drvdata(pdev, host); 139 return 0; 140} 141 142static int mac_ide_remove(struct platform_device *pdev) 143{ 144 struct ide_host *host = platform_get_drvdata(pdev); 145 146 ide_host_remove(host); 147 return 0; 148} 149 150static struct platform_driver mac_ide_driver = { 151 .driver = { 152 .name = DRV_NAME, 153 }, 154 .probe = mac_ide_probe, 155 .remove = mac_ide_remove, 156}; 157 158module_platform_driver(mac_ide_driver); 159 160MODULE_ALIAS("platform:" DRV_NAME); 161MODULE_LICENSE("GPL"); 162