1 files changed, 153 insertions, 0 deletions

diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
new file mode 100644
index 000000000000..39d500d84b07
--- /dev/null
+++ b/drivers/ide/falconide.c
@@ -0,0 +1,153 @@
+/*
+ *  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>
+
+#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.
+     */
+
+int falconide_intr_lock;
+EXPORT_SYMBOL(falconide_intr_lock);
+
+static void falconide_input_data(ide_drive_t *drive, struct request *rq,
+                                 void *buf, unsigned int len)
+{
+        unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return insw(data_addr, buf, (len + 1) / 2);
+
+        insw_swapw(data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_output_data(ide_drive_t *drive, struct request *rq,
+                                  void *buf, unsigned int len)
+{
+        unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return outsw(data_addr, buf, (len + 1) / 2);
+
+        outsw_swapw(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,
+        .read_sff_dma_status    = ide_read_sff_dma_status,
+
+        .set_irq                = ide_set_irq,
+
+        .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 = {
+        .tp_ops                 = &falconide_tp_ops,
+        .host_flags             = IDE_HFLAG_NO_DMA,
+};
+
+static void __init falconide_setup_ports(hw_regs_t *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;
+        hw->ack_intr = NULL;
+
+        hw->chipset = ide_generic;
+}
+
+    /*
+     *  Probe for a Falcon IDE interface
+     */
+
+static int __init falconide_init(void)
+{
+        struct ide_host *host;
+        hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+        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);
+        if (host == NULL) {
+                rc = -ENOMEM;
+                goto err;
+        }
+
+        ide_get_lock(NULL, NULL);
+        rc = ide_host_register(host, &falconide_port_info, hws);
+        ide_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");