1 files changed, 190 insertions, 0 deletions

diff --git a/drivers/ide/gayle.c b/drivers/ide/gayle.c
new file mode 100644
index 000000000000..691506886561
--- /dev/null
+++ b/drivers/ide/gayle.c
@@ -0,0 +1,190 @@
+/*
+ *  Amiga Gayle IDE Driver
+ *
+ *     Created 9 Jul 1997 by Geert Uytterhoeven
+ *
+ *  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/ide.h>
+#include <linux/init.h>
+#include <linux/zorro.h>
+#include <linux/module.h>
+
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/amigayle.h>
+
+
+    /*
+     *  Bases of the IDE interfaces
+     */
+
+#define GAYLE_BASE_4000 0xdd2020        /* A4000/A4000T */
+#define GAYLE_BASE_1200 0xda0000        /* A1200/A600 and E-Matrix 530 */
+
+#define GAYLE_IDEREG_SIZE       0x2000
+
+    /*
+     *  Offsets from one of the above bases
+     */
+
+#define GAYLE_CONTROL   0x101a
+
+    /*
+     *  These are at different offsets from the base
+     */
+
+#define GAYLE_IRQ_4000  0xdd3020        /* MSB = 1, Harddisk is source of */
+#define GAYLE_IRQ_1200  0xda9000        /* interrupt */
+
+
+    /*
+     *  Offset of the secondary port for IDE doublers
+     *  Note that GAYLE_CONTROL is NOT available then!
+     */
+
+#define GAYLE_NEXT_PORT 0x1000
+
+#ifndef CONFIG_BLK_DEV_IDEDOUBLER
+#define GAYLE_NUM_HWIFS         1
+#define GAYLE_NUM_PROBE_HWIFS   GAYLE_NUM_HWIFS
+#define GAYLE_HAS_CONTROL_REG   1
+#else /* CONFIG_BLK_DEV_IDEDOUBLER */
+#define GAYLE_NUM_HWIFS         2
+#define GAYLE_NUM_PROBE_HWIFS   (ide_doubler ? GAYLE_NUM_HWIFS : \
+                                               GAYLE_NUM_HWIFS-1)
+#define GAYLE_HAS_CONTROL_REG   (!ide_doubler)
+
+static int ide_doubler;
+module_param_named(doubler, ide_doubler, bool, 0);
+MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
+#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
+
+
+    /*
+     *  Check and acknowledge the interrupt status
+     */
+
+static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
+{
+    unsigned char ch;
+
+    ch = z_readb(hwif->io_ports.irq_addr);
+    if (!(ch & GAYLE_IRQ_IDE))
+        return 0;
+    return 1;
+}
+
+static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
+{
+    unsigned char ch;
+
+    ch = z_readb(hwif->io_ports.irq_addr);
+    if (!(ch & GAYLE_IRQ_IDE))
+        return 0;
+    (void)z_readb(hwif->io_ports.status_addr);
+    z_writeb(0x7c, hwif->io_ports.irq_addr);
+    return 1;
+}
+
+static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base,
+                                     unsigned long ctl, unsigned long irq_port,
+                                     ide_ack_intr_t *ack_intr)
+{
+        int i;
+
+        memset(hw, 0, sizeof(*hw));
+
+        hw->io_ports.data_addr = base;
+
+        for (i = 1; i < 8; i++)
+                hw->io_ports_array[i] = base + 2 + i * 4;
+
+        hw->io_ports.ctl_addr = ctl;
+        hw->io_ports.irq_addr = irq_port;
+
+        hw->irq = IRQ_AMIGA_PORTS;
+        hw->ack_intr = ack_intr;
+
+        hw->chipset = ide_generic;
+}
+
+    /*
+     *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
+     */
+
+static int __init gayle_init(void)
+{
+    unsigned long phys_base, res_start, res_n;
+    unsigned long base, ctrlport, irqport;
+    ide_ack_intr_t *ack_intr;
+    int a4000, i, rc;
+    hw_regs_t hw[GAYLE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
+
+    if (!MACH_IS_AMIGA)
+        return -ENODEV;
+
+    if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
+        goto found;
+
+#ifdef CONFIG_ZORRO
+    if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
+                          NULL))
+        goto found;
+#endif
+    return -ENODEV;
+
+found:
+        printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
+                         a4000 ? 4000 : 1200,
+#ifdef CONFIG_BLK_DEV_IDEDOUBLER
+                         ide_doubler ? ", IDE doubler" :
+#endif
+                         "");
+
+        if (a4000) {
+            phys_base = GAYLE_BASE_4000;
+            irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
+            ack_intr = gayle_ack_intr_a4000;
+        } else {
+            phys_base = GAYLE_BASE_1200;
+            irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
+            ack_intr = gayle_ack_intr_a1200;
+        }
+/*
+ * FIXME: we now have selectable modes between mmio v/s iomio
+ */
+
+        res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
+        res_n = GAYLE_IDEREG_SIZE;
+
+        if (!request_mem_region(res_start, res_n, "IDE"))
+                return -EBUSY;
+
+    for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
+        base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
+        ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
+
+        gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr);
+
+        hws[i] = &hw[i];
+    }
+
+    rc = ide_host_add(NULL, hws, NULL);
+    if (rc)
+        release_mem_region(res_start, res_n);
+
+    return rc;
+}
+
+module_init(gayle_init);
+
+MODULE_LICENSE("GPL");