patch-2.4.19 linux-2.4.19/arch/mips/sgi-ip22/ip22-gio.c

• Lines: 153
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/sgi-ip22/ip22-gio.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/sgi-ip22/ip22-gio.c linux-2.4.19/arch/mips/sgi-ip22/ip22-gio.c
@@ -0,0 +1,152 @@
+/* 
+ * ip22-gio.c: Support for GIO64 bus (inspired by PCI code)
+ * 
+ * Copyright (C) 2002 Ladislav Michl
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+#include <asm/sgi/sgimc.h>
+#include <asm/sgi/sgigio.h>
+
+#define GIO_PIO_MAP_BASE	0x1f000000L
+#define GIO_PIO_MAP_SIZE	(16 * 1024*1024)
+
+#define GIO_ADDR_GFX		0x1f000000L
+#define GIO_ADDR_GIO1		0x1f400000L
+#define GIO_ADDR_GIO2		0x1f600000L
+
+#define GIO_GFX_MAP_SIZE	(4 * 1024*1024)
+#define GIO_GIO1_MAP_SIZE	(2 * 1024*1024)
+#define GIO_GIO2_MAP_SIZE	(4 * 1024*1024)
+
+#define GIO_NO_DEVICE		0x80
+
+static struct gio_dev gio_slot[GIO_NUM_SLOTS] = {
+	{
+		0,
+		0,
+		0,
+		GIO_NO_DEVICE,
+		GIO_SLOT_GFX,
+		GIO_ADDR_GFX,
+		GIO_GFX_MAP_SIZE,
+		NULL,
+		"GFX"
+	},
+	{
+		0,
+		0,
+		0,
+		GIO_NO_DEVICE,
+		GIO_SLOT_GIO1,
+		GIO_ADDR_GIO1,
+		GIO_GIO1_MAP_SIZE,
+		NULL,
+		"EXP0"
+	},
+	{
+		0,
+		0,
+		0,
+		GIO_NO_DEVICE,
+		GIO_SLOT_GIO2,
+		GIO_ADDR_GIO2,
+		GIO_GIO2_MAP_SIZE,
+		NULL,
+		"EXP1"
+	}
+};
+
+static int gio_read_proc(char *buf, char **start, off_t off,
+			 int count, int *eof, void *data)
+{
+	int i;
+	char *p = buf;
+	
+	p += sprintf(p, "GIO devices found:\n");
+	for (i = 0; i < GIO_NUM_SLOTS; i++) {
+		if (gio_slot[i].flags & GIO_NO_DEVICE)
+			continue;
+		p += sprintf(p, "  Slot %s, DeviceId 0x%02x\n",
+			     gio_slot[i].slot_name, gio_slot[i].device);
+		p += sprintf(p, "    BaseAddr 0x%08lx, MapSize 0x%08x\n",
+			     gio_slot[i].base_addr, gio_slot[i].map_size);
+	}
+	
+	return p - buf;
+}
+
+void create_gio_proc_entry(void)
+{
+	create_proc_read_entry("gio", 0, NULL, gio_read_proc, NULL);
+}
+
+/**
+ * gio_find_device - begin or continue searching for a GIO device by device id
+ * @device: GIO device id to match, or %GIO_ANY_ID to match all device ids
+ * @from: Previous GIO device found in search, or %NULL for new search.
+ *
+ * Iterates through the list of known GIO devices. If a GIO device is found
+ * with a matching @device, a pointer to its device structure is returned. 
+ * Otherwise, %NULL is returned.
+ * A new search is initiated by passing %NULL to the @from argument.
+ * Otherwise if @from is not %NULL, searches continue from next device.
+ */
+struct gio_dev *
+gio_find_device(unsigned char device, const struct gio_dev *from)
+{
+	int i;
+	
+	for (i = (from) ? from->slot_number : 0; i < GIO_NUM_SLOTS; i++)
+		if (!(gio_slot[i].flags & GIO_NO_DEVICE) && 
+		   (device == GIO_ANY_ID || device == gio_slot[i].device))
+			return &gio_slot[i];
+	
+	return NULL;
+}
+
+#define GIO_IDCODE(x)		(x & 0x7f)
+#define GIO_ALL_BITS_VALID	0x80
+#define GIO_REV(x)		((x >> 8) & 0xff)
+#define GIO_GIO_SIZE_64		0x10000
+#define GIO_ROM_PRESENT		0x20000
+#define GIO_VENDOR_CODE(x)	((x >> 18) & 0x3fff)
+
+extern int ip22_baddr(unsigned int *val, unsigned long addr);
+
+/** 
+ * sgigio_init - scan the GIO space and figure out what hardware is actually
+ * present.
+ */
+void __init sgigio_init(void)
+{
+	unsigned int i, id, found = 0;
+
+	printk("GIO: Scanning for GIO cards...\n");
+	for (i = 0; i < GIO_NUM_SLOTS; i++) {
+		if (ip22_baddr(&id, KSEG1ADDR(gio_slot[i].base_addr)))
+			continue;
+
+		found = 1;
+		gio_slot[i].device = GIO_IDCODE(id);
+		if (id & GIO_ALL_BITS_VALID) {
+			gio_slot[i].revision = GIO_REV(id);
+			gio_slot[i].vendor = GIO_VENDOR_CODE(id);
+			gio_slot[i].flags =
+				(id & GIO_GIO_SIZE_64) ? GIO_IFACE_64 : 0 |
+				(id & GIO_ROM_PRESENT) ? GIO_HAS_ROM : 0;
+		} else
+			gio_slot[i].flags = GIO_VALID_ID_ONLY;
+
+		printk("GIO: Card 0x%02x @ 0x%08lx\n", gio_slot[i].device,
+			gio_slot[i].base_addr);
+	}
+	
+	if (!found)
+		printk("GIO: No GIO cards present.\n");
+}