/* *  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 <linux/platform_device.h> #include <asm/macintosh.h> #define DRV_NAME "mac_ide" #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 mac_ide_probe(struct platform_device *pdev){	struct resource *mem, *irq;	struct ide_hw hw, *hws[] = { &hw };	struct ide_port_info d = macide_port_info;	struct ide_host *host;	int rc; 	if (!MACH_IS_MAC)		return -ENODEV; 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);	if (!mem)		return -ENODEV; 	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);	if (!irq)		return -ENODEV; 	if (!devm_request_mem_region(&pdev->dev, mem->start,				     resource_size(mem), DRV_NAME)) {		dev_err(&pdev->dev, "resources busy\n");		return -EBUSY;	} 	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",			 mac_ide_name[macintosh_config->ide_type - 1]); 	macide_setup_ports(&hw, mem->start, irq->start); 	rc = ide_host_add(&d, hws, 1, &host);	if (rc)		return rc; 	platform_set_drvdata(pdev, host);	return 0;} static int mac_ide_remove(struct platform_device *pdev){	struct ide_host *host = platform_get_drvdata(pdev); 	ide_host_remove(host);	return 0;} static struct platform_driver mac_ide_driver = {	.driver = {		.name = DRV_NAME,	},	.probe  = mac_ide_probe,	.remove = mac_ide_remove,}; module_platform_driver(mac_ide_driver); MODULE_ALIAS("platform:" DRV_NAME);MODULE_LICENSE("GPL");