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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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