diff options
Diffstat (limited to 'drivers/ide/legacy/macide.c')
| -rw-r--r-- | drivers/ide/legacy/macide.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/ide/legacy/macide.c b/drivers/ide/legacy/macide.c new file mode 100644 index 0000000..90cac609 --- /dev/null +++ b/drivers/ide/legacy/macide.c @@ -0,0 +1,155 @@ +/* + * 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); + } +} |