Initial import

1 files changed, 188 insertions, 0 deletions

diff --git a/drivers/ide/gayle.c b/drivers/ide/gayle.c
new file mode 100644
index 000000000..901e6ebfe
--- /dev/null
+++ b/drivers/ide/gayle.c
@@ -0,0 +1,188 @@
+/*
+ *  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 <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/amigayle.h>
+
+
+    /*
+     *  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
+
+#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 bool ide_doubler;
+module_param_named(doubler, ide_doubler, bool, 0);
+MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
+
+    /*
+     *  Check and acknowledge the interrupt status
+     */
+
+static int gayle_test_irq(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 void gayle_a1200_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	(void)z_readb(hwif->io_ports.status_addr);
+	z_writeb(0x7c, hwif->io_ports.irq_addr);
+}
+
+static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
+				     unsigned long ctl, unsigned long irq_port)
+{
+	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;
+}
+
+static const struct ide_port_ops gayle_a4000_port_ops = {
+	.test_irq		= gayle_test_irq,
+};
+
+static const struct ide_port_ops gayle_a1200_port_ops = {
+	.clear_irq		= gayle_a1200_clear_irq,
+	.test_irq		= gayle_test_irq,
+};
+
+static const struct ide_port_info gayle_port_info = {
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+    /*
+     *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
+     */
+
+static int __init amiga_gayle_ide_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct gayle_ide_platform_data *pdata;
+	unsigned long base, ctrlport, irqport;
+	unsigned int i;
+	int error;
+	struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
+	struct ide_port_info d = gayle_port_info;
+	struct ide_host *host;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!request_mem_region(res->start, resource_size(res), "IDE"))
+		return -EBUSY;
+
+	pdata = dev_get_platdata(&pdev->dev);
+	pr_info("ide: Gayle IDE controller (A%u style%s)\n",
+		pdata->explicit_ack ? 1200 : 4000,
+		ide_doubler ? ", IDE doubler" : "");
+
+	base = (unsigned long)ZTWO_VADDR(pdata->base);
+	ctrlport = 0;
+	irqport = (unsigned long)ZTWO_VADDR(pdata->irqport);
+	if (pdata->explicit_ack)
+		d.port_ops = &gayle_a1200_port_ops;
+	else
+		d.port_ops = &gayle_a4000_port_ops;
+
+	for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) {
+		if (GAYLE_HAS_CONTROL_REG)
+			ctrlport = base + GAYLE_CONTROL;
+
+		gayle_setup_ports(&hw[i], base, ctrlport, irqport);
+		hws[i] = &hw[i];
+	}
+
+	error = ide_host_add(&d, hws, i, &host);
+	if (error)
+		goto out;
+
+	platform_set_drvdata(pdev, host);
+	return 0;
+
+out:
+	release_mem_region(res->start, resource_size(res));
+	return error;
+}
+
+static int __exit amiga_gayle_ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	ide_host_remove(host);
+	release_mem_region(res->start, resource_size(res));
+	return 0;
+}
+
+static struct platform_driver amiga_gayle_ide_driver = {
+	.remove = __exit_p(amiga_gayle_ide_remove),
+	.driver   = {
+		.name	= "amiga-gayle-ide",
+	},
+};
+
+module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-gayle-ide");