v4.19.13 snapshot.
diff --git a/drivers/ide/macide.c b/drivers/ide/macide.c
new file mode 100644
index 0000000..adc5fe9
--- /dev/null
+++ b/drivers/ide/macide.c
@@ -0,0 +1,141 @@
+/*
+ * 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 <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_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 __init macide_init(void)
+{
+ unsigned long base;
+ int irq;
+ struct ide_hw hw, *hws[] = { &hw };
+ struct ide_port_info d = macide_port_info;
+
+ if (!MACH_IS_MAC)
+ return -ENODEV;
+
+ switch (macintosh_config->ide_type) {
+ case MAC_IDE_QUADRA:
+ base = IDE_BASE;
+ irq = IRQ_NUBUS_F;
+ break;
+ case MAC_IDE_PB:
+ base = IDE_BASE;
+ irq = IRQ_NUBUS_C;
+ break;
+ case MAC_IDE_BABOON:
+ base = BABOON_BASE;
+ d.port_ops = NULL;
+ irq = IRQ_BABOON_1;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
+ mac_ide_name[macintosh_config->ide_type - 1]);
+
+ macide_setup_ports(&hw, base, irq);
+
+ return ide_host_add(&d, hws, 1, NULL);
+}
+
+module_init(macide_init);
+
+MODULE_LICENSE("GPL");