patch-2.4.21 linux-2.4.21/drivers/mtd/maps/impa7.c

• Lines: 235
• Date: 2003-06-13 07:51:34.000000000 -0700
• Orig file: linux-2.4.20/drivers/mtd/maps/impa7.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/mtd/maps/impa7.c linux-2.4.21/drivers/mtd/maps/impa7.c
@@ -0,0 +1,234 @@
+/*
+ * $Id: impa7.c,v 1.2 2002/09/05 05:11:24 acurtis Exp $
+ *
+ * Handle mapping of the NOR flash on implementa A7 boards
+ *
+ * Copyright 2002 SYSGO Real-Time Solutions GmbH
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/config.h>
+
+#ifdef CONFIG_MTD_PARTITIONS
+#include <linux/mtd/partitions.h>
+#endif
+
+#define WINDOW_ADDR0 0x00000000      /* physical properties of flash */
+#define WINDOW_SIZE0 0x00800000
+#define WINDOW_ADDR1 0x10000000      /* physical properties of flash */
+#define WINDOW_SIZE1 0x00800000
+#define NUM_FLASHBANKS 2
+#define BUSWIDTH     4
+
+/* can be { "cfi_probe", "jedec_probe", "map_rom", 0 }; */
+#define PROBETYPES { "jedec_probe", 0 }
+
+#define MSG_PREFIX "impA7:"   /* prefix for our printk()'s */
+#define MTDID      "impa7-%d"  /* for mtdparts= partitioning */
+
+static struct mtd_info *impa7_mtd[NUM_FLASHBANKS] = { 0 };
+
+__u8 impa7_read8(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readb(map->map_priv_1 + ofs);
+}
+
+__u16 impa7_read16(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readw(map->map_priv_1 + ofs);
+}
+
+__u32 impa7_read32(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readl(map->map_priv_1 + ofs);
+}
+
+void impa7_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void impa7_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	__raw_writeb(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void impa7_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	__raw_writew(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void impa7_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	__raw_writel(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void impa7_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+static struct map_info impa7_map[NUM_FLASHBANKS] = {
+	{
+	name: "impA7 NOR Flash Bank #0",
+	size: WINDOW_SIZE0,
+	buswidth: BUSWIDTH,
+	read8: impa7_read8,
+	read16: impa7_read16,
+	read32: impa7_read32,
+	copy_from: impa7_copy_from,
+	write8: impa7_write8,
+	write16: impa7_write16,
+	write32: impa7_write32,
+	copy_to: impa7_copy_to
+	},
+	{
+	name: "impA7 NOR Flash Bank #1",
+	size: WINDOW_SIZE1,
+	buswidth: BUSWIDTH,
+	read8: impa7_read8,
+	read16: impa7_read16,
+	read32: impa7_read32,
+	copy_from: impa7_copy_from,
+	write8: impa7_write8,
+	write16: impa7_write16,
+	write32: impa7_write32,
+	copy_to: impa7_copy_to
+	},
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+
+/*
+ * MTD partitioning stuff 
+ */
+static struct mtd_partition static_partitions[] =
+{
+    {
+	name: "FileSystem",
+	  size: 0x800000,
+	  offset: 0x00000000
+    },
+};
+
+#define NB_OF(x) (sizeof (x) / sizeof (x[0]))
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+int parse_cmdline_partitions(struct mtd_info *master, 
+			     struct mtd_partition **pparts,
+			     const char *mtd_id);
+#endif
+
+#endif
+
+static int                   mtd_parts_nb = 0;
+static struct mtd_partition *mtd_parts    = 0;
+
+int __init init_impa7(void)
+{
+	static const char *rom_probe_types[] = PROBETYPES;
+	const char **type;
+	const char *part_type = 0;
+	int i;
+	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
+	  { WINDOW_ADDR0, WINDOW_SIZE0 },
+	  { WINDOW_ADDR1, WINDOW_SIZE1 },
+        };
+	char mtdid[10];
+	int devicesfound = 0;
+
+	for(i=0; i<NUM_FLASHBANKS; i++)
+	{
+		printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
+		       pt[i].size, pt[i].addr);
+		impa7_map[i].map_priv_1 = (unsigned long)
+		  ioremap(pt[i].addr, pt[i].size);
+
+		if (!impa7_map[i].map_priv_1) {
+			printk(MSG_PREFIX "failed to ioremap\n");
+			return -EIO;
+		}
+
+		impa7_mtd[i] = 0;
+		type = rom_probe_types;
+		for(; !impa7_mtd[i] && *type; type++) {
+			impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
+		}
+
+		if (impa7_mtd[i]) 
+		{
+			impa7_mtd[i]->module = THIS_MODULE;
+			add_mtd_device(impa7_mtd[i]);
+			devicesfound++;
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+			sprintf(mtdid, MTDID, i);
+			mtd_parts_nb = parse_cmdline_partitions(impa7_mtd[i], 
+								&mtd_parts, 
+								mtdid);
+			if (mtd_parts_nb > 0)
+			  part_type = "command line";
+#endif
+			if (mtd_parts_nb <= 0)
+			{
+				mtd_parts = static_partitions;
+				mtd_parts_nb = NB_OF(static_partitions);
+				part_type = "static";
+			}
+			if (mtd_parts_nb <= 0)
+			{
+				printk(KERN_NOTICE MSG_PREFIX 
+				       "no partition info available\n");
+			}
+			else
+			{
+				printk(KERN_NOTICE MSG_PREFIX
+				       "using %s partition definition\n", 
+				       part_type);
+				add_mtd_partitions(impa7_mtd[i], 
+						   mtd_parts, mtd_parts_nb);
+			}
+#endif
+		}
+		else 
+		  iounmap((void *)impa7_map[i].map_priv_1);
+	}
+	return devicesfound == 0 ? -ENXIO : 0;
+}
+
+static void __exit cleanup_impa7(void)
+{
+	int i;
+	for (i=0; i<NUM_FLASHBANKS; i++) 
+	{
+		if (impa7_mtd[i]) 
+		{
+			del_mtd_device(impa7_mtd[i]);
+			map_destroy(impa7_mtd[i]);
+		}
+		if (impa7_map[i].map_priv_1)
+		{
+			iounmap((void *)impa7_map[i].map_priv_1);
+			impa7_map[i].map_priv_1 = 0;
+		}
+	}
+}
+
+module_init(init_impa7);
+module_exit(cleanup_impa7);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
+MODULE_DESCRIPTION("MTD map driver for implementa impA7");