Initial import

1 files changed, 178 insertions, 0 deletions

diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
new file mode 100644
index 000000000..a5a07ccb8
--- /dev/null
+++ b/drivers/ide/falconide.c
@@ -0,0 +1,178 @@
+/*
+ *  Atari Falcon IDE Driver
+ *
+ *     Created 12 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/module.h>
+#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 <asm/setup.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/ide.h>
+
+#define DRV_NAME "falconide"
+
+    /*
+     *  Base of the IDE interface
+     */
+
+#define ATA_HD_BASE	0xfff00000
+
+    /*
+     *  Offsets from the above base
+     */
+
+#define ATA_HD_CONTROL	0x39
+
+    /*
+     *  falconide_intr_lock is used to obtain access to the IDE interrupt,
+     *  which is shared between several drivers.
+     */
+
+static int falconide_intr_lock;
+
+static void falconide_release_lock(void)
+{
+	if (falconide_intr_lock == 0) {
+		printk(KERN_ERR "%s: bug\n", __func__);
+		return;
+	}
+	falconide_intr_lock = 0;
+	stdma_release();
+}
+
+static void falconide_get_lock(irq_handler_t handler, void *data)
+{
+	if (falconide_intr_lock == 0) {
+		if (in_interrupt() > 0)
+			panic("Falcon IDE hasn't ST-DMA lock in interrupt");
+		stdma_lock(handler, data);
+		falconide_intr_lock = 1;
+	}
+}
+
+static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
+				 void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_insw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
+				  void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_outsw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+/* Atari has a byte-swapped IDE interface */
+static const struct ide_tp_ops falconide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= falconide_input_data,
+	.output_data		= falconide_output_data,
+};
+
+static const struct ide_port_info falconide_port_info = {
+	.get_lock		= falconide_get_lock,
+	.release_lock		= falconide_release_lock,
+	.tp_ops			= &falconide_tp_ops,
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+static void __init falconide_setup_ports(struct ide_hw *hw)
+{
+	int i;
+
+	memset(hw, 0, sizeof(*hw));
+
+	hw->io_ports.data_addr = ATA_HD_BASE;
+
+	for (i = 1; i < 8; i++)
+		hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
+
+	hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
+
+	hw->irq = IRQ_MFP_IDE;
+}
+
+    /*
+     *  Probe for a Falcon IDE interface
+     */
+
+static int __init falconide_init(void)
+{
+	struct ide_host *host;
+	struct ide_hw hw, *hws[] = { &hw };
+	int rc;
+
+	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
+		return -ENODEV;
+
+	printk(KERN_INFO "ide: Falcon IDE controller\n");
+
+	if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
+		printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
+		return -EBUSY;
+	}
+
+	falconide_setup_ports(&hw);
+
+	host = ide_host_alloc(&falconide_port_info, hws, 1);
+	if (host == NULL) {
+		rc = -ENOMEM;
+		goto err;
+	}
+
+	falconide_get_lock(NULL, NULL);
+	rc = ide_host_register(host, &falconide_port_info, hws);
+	falconide_release_lock();
+
+	if (rc)
+		goto err_free;
+
+	return 0;
+err_free:
+	ide_host_free(host);
+err:
+	release_mem_region(ATA_HD_BASE, 0x40);
+	return rc;
+}
+
+module_init(falconide_init);
+
+MODULE_LICENSE("GPL");