/* * 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");