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path: root/drivers/ide/legacy/gayle.c
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Diffstat (limited to 'drivers/ide/legacy/gayle.c')
-rw-r--r--drivers/ide/legacy/gayle.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/ide/legacy/gayle.c b/drivers/ide/legacy/gayle.c
new file mode 100644
index 000000000000..3fac3e9ec47d
--- /dev/null
+++ b/drivers/ide/legacy/gayle.c
@@ -0,0 +1,186 @@
+/*
+ * linux/drivers/ide/legacy/gayle.c -- 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/config.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/zorro.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 */
+
+ /*
+ * Offsets from one of the above bases
+ */
+
+#define GAYLE_DATA 0x00
+#define GAYLE_ERROR 0x06 /* see err-bits */
+#define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
+#define GAYLE_SECTOR 0x0e /* starting sector */
+#define GAYLE_LCYL 0x12 /* starting cylinder */
+#define GAYLE_HCYL 0x16 /* high byte of starting cyl */
+#define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
+#define GAYLE_STATUS 0x1e /* see status-bits */
+#define GAYLE_CONTROL 0x101a
+
+static int gayle_offsets[IDE_NR_PORTS] __initdata = {
+ GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
+ GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
+};
+
+
+ /*
+ * 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
+#define GAYLE_IDEREG_SIZE 0x2000
+#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)
+#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
+int ide_doubler = 0; /* support 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[IDE_IRQ_OFFSET]);
+ 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[IDE_IRQ_OFFSET]);
+ if (!(ch & GAYLE_IRQ_IDE))
+ return 0;
+ (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
+ z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
+ return 1;
+}
+
+ /*
+ * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
+ */
+
+void __init gayle_init(void)
+{
+ int a4000, i;
+
+ if (!MACH_IS_AMIGA)
+ return;
+
+ 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;
+
+found:
+ for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
+ unsigned long base, ctrlport, irqport;
+ ide_ack_intr_t *ack_intr;
+ hw_regs_t hw;
+ ide_hwif_t *hwif;
+ int index;
+ unsigned long phys_base, res_start, res_n;
+
+ 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
+ */
+
+ phys_base += i*GAYLE_NEXT_PORT;
+
+ res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
+ res_n = GAYLE_IDEREG_SIZE;
+
+ if (!request_mem_region(res_start, res_n, "IDE"))
+ continue;
+
+ base = (unsigned long)ZTWO_VADDR(phys_base);
+ ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
+
+ ide_setup_ports(&hw, base, gayle_offsets,
+ ctrlport, irqport, ack_intr,
+// &gayle_iops,
+ IRQ_AMIGA_PORTS);
+
+ index = ide_register_hw(&hw, &hwif);
+ if (index != -1) {
+ hwif->mmio = 2;
+ switch (i) {
+ case 0:
+ printk("ide%d: Gayle IDE interface (A%d style)\n", index,
+ a4000 ? 4000 : 1200);
+ break;
+#ifdef CONFIG_BLK_DEV_IDEDOUBLER
+ case 1:
+ printk("ide%d: IDE doubler\n", index);
+ break;
+#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
+ }
+ } else
+ release_mem_region(res_start, res_n);
+ }
+}