1 files changed, 165 insertions, 0 deletions

diff --git a/drivers/ide/q40ide.c b/drivers/ide/q40ide.c
new file mode 100644
index 000000000000..4af4a8ce4cdf
--- /dev/null
+++ b/drivers/ide/q40ide.c
@@ -0,0 +1,165 @@
+/*
+ *  Q40 I/O port IDE Driver
+ *
+ *     (c) Richard Zidlicky
+ *
+ *  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>
+
+    /*
+     *  Bases of the IDE interfaces
+     */
+
+#define Q40IDE_NUM_HWIFS        2
+
+#define PCIDE_BASE1     0x1f0
+#define PCIDE_BASE2     0x170
+#define PCIDE_BASE3     0x1e8
+#define PCIDE_BASE4     0x168
+#define PCIDE_BASE5     0x1e0
+#define PCIDE_BASE6     0x160
+
+static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
+    PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4  , PCIDE_BASE5,
+    PCIDE_BASE6 */
+};
+
+static int q40ide_default_irq(unsigned long base)
+{
+           switch (base) {
+                    case 0x1f0: return 14;
+                    case 0x170: return 15;
+                    case 0x1e8: return 11;
+                    default:
+                        return 0;
+           }
+}
+
+
+/*
+ * Addresses are pretranslated for Q40 ISA access.
+ */
+static void q40_ide_setup_ports(hw_regs_t *hw, unsigned long base,
+                        ide_ack_intr_t *ack_intr,
+                        int irq)
+{
+        memset(hw, 0, sizeof(hw_regs_t));
+        /* BIG FAT WARNING: 
+           assumption: only DATA port is ever used in 16 bit mode */
+        hw->io_ports.data_addr = Q40_ISA_IO_W(base);
+        hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1);
+        hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2);
+        hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3);
+        hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4);
+        hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5);
+        hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6);
+        hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7);
+        hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
+
+        hw->irq = irq;
+        hw->ack_intr = ack_intr;
+
+        hw->chipset = ide_generic;
+}
+
+static void q40ide_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 q40ide_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);
+}
+
+/* Q40 has a byte-swapped IDE interface */
+static const struct ide_tp_ops q40ide_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             = q40ide_input_data,
+        .output_data            = q40ide_output_data,
+};
+
+static const struct ide_port_info q40ide_port_info = {
+        .tp_ops                 = &q40ide_tp_ops,
+        .host_flags             = IDE_HFLAG_NO_DMA,
+};
+
+/* 
+ * the static array is needed to have the name reported in /proc/ioports,
+ * hwif->name unfortunately isn't available yet
+ */
+static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
+        "ide0", "ide1"
+};
+
+/*
+ *  Probe for Q40 IDE interfaces
+ */
+
+static int __init q40ide_init(void)
+{
+    int i;
+    hw_regs_t hw[Q40IDE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
+
+    if (!MACH_IS_Q40)
+      return -ENODEV;
+
+    printk(KERN_INFO "ide: Q40 IDE controller\n");
+
+    for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
+        const char *name = q40_ide_names[i];
+
+        if (!request_region(pcide_bases[i], 8, name)) {
+                printk("could not reserve ports %lx-%lx for %s\n",
+                       pcide_bases[i],pcide_bases[i]+8,name);
+                continue;
+        }
+        if (!request_region(pcide_bases[i]+0x206, 1, name)) {
+                printk("could not reserve port %lx for %s\n",
+                       pcide_bases[i]+0x206,name);
+                release_region(pcide_bases[i], 8);
+                continue;
+        }
+        q40_ide_setup_ports(&hw[i], pcide_bases[i], NULL,
+                        q40ide_default_irq(pcide_bases[i]));
+
+        hws[i] = &hw[i];
+    }
+
+    return ide_host_add(&q40ide_port_info, hws, NULL);
+}
+
+module_init(q40ide_init);
+
+MODULE_LICENSE("GPL");