/* * linux/drivers/ide/legacy/macide.c -- 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/config.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/hdreg.h> #include <linux/delay.h> #include <linux/ide.h> #include <asm/machw.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_DATA 0x00 #define IDE_ERROR 0x04 /* see err-bits */ #define IDE_NSECTOR 0x08 /* nr of sectors to read/write */ #define IDE_SECTOR 0x0c /* starting sector */ #define IDE_LCYL 0x10 /* starting cylinder */ #define IDE_HCYL 0x14 /* high byte of starting cyl */ #define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */ #define IDE_STATUS 0x1c /* see status-bits */ #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); static int macide_offsets[IDE_NR_PORTS] = { IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL, IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL }; int macide_ack_intr(ide_hwif_t* hwif) { if (*ide_ifr & 0x20) { *ide_ifr &= ~0x20; return 1; } return 0; } #ifdef CONFIG_BLK_DEV_MAC_MEDIABAY static void macide_mediabay_interrupt(int irq, void *dev_id, struct pt_regs *regs) { int state = baboon->mb_status & 0x04; printk(KERN_INFO "macide: media bay %s detected\n", state? "removal":"insertion"); } #endif /* * Probe for a Macintosh IDE interface */ void macide_init(void) { hw_regs_t hw; ide_hwif_t *hwif; int index = -1; switch (macintosh_config->ide_type) { case MAC_IDE_QUADRA: ide_setup_ports(&hw, IDE_BASE, macide_offsets, 0, 0, macide_ack_intr, // quadra_ide_iops, IRQ_NUBUS_F); index = ide_register_hw(&hw, &hwif); break; case MAC_IDE_PB: ide_setup_ports(&hw, IDE_BASE, macide_offsets, 0, 0, macide_ack_intr, // macide_pb_iops, IRQ_NUBUS_C); index = ide_register_hw(&hw, &hwif); break; case MAC_IDE_BABOON: ide_setup_ports(&hw, BABOON_BASE, macide_offsets, 0, 0, NULL, // macide_baboon_iops, IRQ_BABOON_1); index = ide_register_hw(&hw, &hwif); if (index == -1) break; if (macintosh_config->ident == MAC_MODEL_PB190) { /* Fix breakage in ide-disk.c: drive capacity */ /* is not initialized for drives without a */ /* hardware ID, and we can't get that without */ /* probing the drive which freezes a 190. */ ide_drive_t *drive = &ide_hwifs[index].drives[0]; drive->capacity64 = drive->cyl*drive->head*drive->sect; #ifdef CONFIG_BLK_DEV_MAC_MEDIABAY request_irq(IRQ_BABOON_2, macide_mediabay_interrupt, IRQ_FLG_FAST, "mediabay", macide_mediabay_interrupt); #endif } break; default: return; } if (index != -1) { hwif->mmio = 2; if (macintosh_config->ide_type == MAC_IDE_QUADRA) printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index); else if (macintosh_config->ide_type == MAC_IDE_PB) printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index); else if (macintosh_config->ide_type == MAC_IDE_BABOON) printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index); else printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index); } }