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- /*
- * 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");
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