patch-2.2.18 linux/drivers/block/q40ide.c

• Lines: 110
• Date: Fri Oct 13 23:59:43 2000
• Orig file: v2.2.17/drivers/block/q40ide.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/block/q40ide.c linux/drivers/block/q40ide.c
@@ -0,0 +1,109 @@
+/*
+ *  linux/drivers/block/q40ide.c -- Q40 I/O port IDE Driver
+ *
+ *     original file 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.
+ *
+ * RZ:
+ *  almost identical with pcide.c, maybe we can merge it later. 
+ *  Differences:
+ *       max 2 HWIFS for now
+ *       translate portaddresses to q40 native addresses (not yet...) instead rely on in/out[bw]
+ *         address translation
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+
+#include "ide.h"
+
+    /*
+     *  Bases of the IDE interfaces
+     */
+
+#define PCIDE_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 q40ide_ioreg_t pcide_bases[PCIDE_NUM_HWIFS] = {
+    PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4  , PCIDE_BASE5,
+    PCIDE_BASE6 */
+};
+
+
+    /*
+     *  Offsets from one of the above bases
+     */
+
+#undef HD_DATA
+#define HD_DATA  0x1f0
+
+#define PCIDE_REG(x)	((q40ide_ioreg_t)(HD_##x-PCIDE_BASE1))
+
+static const int pcide_offsets[IDE_NR_PORTS] = {
+    PCIDE_REG(DATA), PCIDE_REG(ERROR), PCIDE_REG(NSECTOR), PCIDE_REG(SECTOR),
+    PCIDE_REG(LCYL), PCIDE_REG(HCYL), PCIDE_REG(CURRENT), PCIDE_REG(STATUS),
+    PCIDE_REG(CMD)
+};
+
+int q40ide_default_irq(q40ide_ioreg_t base)
+{
+           switch (base) { 
+	            case 0x1f0: return 14;
+		    case 0x170: return 15;
+		    case 0x1e8: return 11;
+		    default:
+			return 0;
+	   }
+}
+
+void q40_ide_init_hwif_ports (q40ide_ioreg_t *p, q40ide_ioreg_t base, int *irq)
+{
+	q40ide_ioreg_t port = base;
+	int i = 8;
+
+	while (i--)
+		*p++ = port++;
+	*p++ = base + 0x206;
+	if (irq != NULL)
+		*irq = 0;
+}
+
+
+    /*
+     *  Probe for PC IDE interfaces
+     */
+
+int q40ide_probe_hwif(int index, ide_hwif_t *hwif)
+{
+    static int pcide_index[PCIDE_NUM_HWIFS] = { 0, };
+    int i;
+
+    if (!MACH_IS_Q40)
+      return 0;
+
+    for (i = 0; i < PCIDE_NUM_HWIFS; i++) {
+	if (!pcide_index[i]) {
+	  /*printk("ide%d: Q40 IDE interface\n", index);*/
+	    pcide_index[i] = index+1;
+	}
+	if (pcide_index[i] == index+1) {
+	    ide_setup_ports(hwif,(ide_ioreg_t) pcide_bases[i], pcide_offsets, 0, /*q40_ack_intr???*/ NULL);
+	    hwif->irq = ide_default_irq((ide_ioreg_t)pcide_bases[i]); /*q40_ide_irq[i];  */ /* 14 */
+	    return 1;
+	}
+    }
+    return 0;
+}