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161 lines
3.5 KiB
161 lines
3.5 KiB
/* |
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* Macintosh IDE Driver |
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* |
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* Copyright (C) 1998 by Michael Schmitz |
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* |
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* This driver was written based on information obtained from the MacOS IDE |
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* driver binary by Mikael Forselius |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive for |
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* more details. |
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*/ |
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#include <linux/types.h> |
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#include <linux/mm.h> |
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#include <linux/interrupt.h> |
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#include <linux/blkdev.h> |
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#include <linux/delay.h> |
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#include <linux/ide.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <asm/macintosh.h> |
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#define DRV_NAME "mac_ide" |
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#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ |
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/* |
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* Generic IDE registers as offsets from the base |
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* These match MkLinux so they should be correct. |
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*/ |
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#define IDE_CONTROL 0x38 /* control/altstatus */ |
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/* |
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* Mac-specific registers |
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*/ |
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/* |
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* this register is odd; it doesn't seem to do much and it's |
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* not word-aligned like virtually every other hardware register |
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* on the Mac... |
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*/ |
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#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: |
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* |
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* Bit 0+1: some interrupt flags |
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* Bit 2+3: some interrupt enable |
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* Bit 4: ?? |
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* Bit 5: IDE interrupt flag (any hwif) |
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* Bit 6: maybe IDE interrupt enable (any hwif) ?? |
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* Bit 7: Any interrupt condition |
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*/ |
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volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); |
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int macide_test_irq(ide_hwif_t *hwif) |
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{ |
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if (*ide_ifr & 0x20) |
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return 1; |
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return 0; |
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} |
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static void macide_clear_irq(ide_drive_t *drive) |
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{ |
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*ide_ifr &= ~0x20; |
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} |
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static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, |
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int irq) |
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{ |
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int i; |
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memset(hw, 0, sizeof(*hw)); |
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for (i = 0; i < 8; i++) |
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hw->io_ports_array[i] = base + i * 4; |
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hw->io_ports.ctl_addr = base + IDE_CONTROL; |
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hw->irq = irq; |
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} |
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static const struct ide_port_ops macide_port_ops = { |
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.clear_irq = macide_clear_irq, |
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.test_irq = macide_test_irq, |
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}; |
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static const struct ide_port_info macide_port_info = { |
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.port_ops = &macide_port_ops, |
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.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, |
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.irq_flags = IRQF_SHARED, |
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.chipset = ide_generic, |
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}; |
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static const char *mac_ide_name[] = |
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{ "Quadra", "Powerbook", "Powerbook Baboon" }; |
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/* |
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* Probe for a Macintosh IDE interface |
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*/ |
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static int mac_ide_probe(struct platform_device *pdev) |
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{ |
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struct resource *mem, *irq; |
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struct ide_hw hw, *hws[] = { &hw }; |
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struct ide_port_info d = macide_port_info; |
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struct ide_host *host; |
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int rc; |
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if (!MACH_IS_MAC) |
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return -ENODEV; |
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!mem) |
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return -ENODEV; |
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irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
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if (!irq) |
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return -ENODEV; |
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if (!devm_request_mem_region(&pdev->dev, mem->start, |
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resource_size(mem), DRV_NAME)) { |
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dev_err(&pdev->dev, "resources busy\n"); |
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return -EBUSY; |
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} |
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printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
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mac_ide_name[macintosh_config->ide_type - 1]); |
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macide_setup_ports(&hw, mem->start, irq->start); |
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rc = ide_host_add(&d, hws, 1, &host); |
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if (rc) |
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return rc; |
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platform_set_drvdata(pdev, host); |
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return 0; |
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} |
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static int mac_ide_remove(struct platform_device *pdev) |
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{ |
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struct ide_host *host = platform_get_drvdata(pdev); |
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ide_host_remove(host); |
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return 0; |
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} |
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static struct platform_driver mac_ide_driver = { |
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.driver = { |
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.name = DRV_NAME, |
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}, |
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.probe = mac_ide_probe, |
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.remove = mac_ide_remove, |
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}; |
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module_platform_driver(mac_ide_driver); |
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MODULE_ALIAS("platform:" DRV_NAME); |
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MODULE_LICENSE("GPL");
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