1 files changed, 176 insertions, 0 deletions

diff --git a/drivers/mtd/maps/epxa10db-flash.c b/drivers/mtd/maps/epxa10db-flash.c
new file mode 100644
index 000000000000..ab6dbe2b8cce
--- /dev/null
+++ b/drivers/mtd/maps/epxa10db-flash.c
@@ -0,0 +1,176 @@
+/*
+ * Flash memory access on EPXA based devices
+ *
+ * (C) 2000 Nicolas Pitre <nico@cam.org>
+ *  Copyright (C) 2001 Altera Corporation
+ *  Copyright (C) 2001 Red Hat, Inc.
+ *
+ * $Id: epxa10db-flash.c,v 1.13 2004/11/04 13:24:14 gleixner Exp $ 
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/hardware.h>
+#ifdef CONFIG_EPXA10DB
+#define BOARD_NAME "EPXA10DB"
+#else
+#define BOARD_NAME "EPXA1DB"
+#endif
+
+static int nr_parts = 0;
+static struct mtd_partition *parts;
+
+static struct mtd_info *mymtd;
+
+static int epxa_default_partitions(struct mtd_info *master, struct mtd_partition **pparts);
+
+
+static struct map_info epxa_map = {
+        .name =         "EPXA flash",
+        .size =         FLASH_SIZE,
+        .bankwidth =    2,
+        .phys =         FLASH_START,
+};
+
+static const char *probes[] = { "RedBoot", "afs", NULL };
+
+static int __init epxa_mtd_init(void)
+{
+        int i;
+        
+        printk(KERN_NOTICE "%s flash device: 0x%x at 0x%x\n", BOARD_NAME, FLASH_SIZE, FLASH_START);
+
+        epxa_map.virt = ioremap(FLASH_START, FLASH_SIZE);
+        if (!epxa_map.virt) {
+                printk("Failed to ioremap %s flash\n",BOARD_NAME);
+                return -EIO;
+        }
+        simple_map_init(&epxa_map);
+
+        mymtd = do_map_probe("cfi_probe", &epxa_map);
+        if (!mymtd) {
+                iounmap((void *)epxa_map.virt);
+                return -ENXIO;
+        }
+
+        mymtd->owner = THIS_MODULE;
+
+        /* Unlock the flash device. */
+        if(mymtd->unlock){
+                for (i=0; i<mymtd->numeraseregions;i++){
+                        int j;
+                        for(j=0;j<mymtd->eraseregions[i].numblocks;j++){
+                                mymtd->unlock(mymtd,mymtd->eraseregions[i].offset + j * mymtd->eraseregions[i].erasesize,mymtd->eraseregions[i].erasesize);
+                        }
+                }
+        }
+
+#ifdef CONFIG_MTD_PARTITIONS
+        nr_parts = parse_mtd_partitions(mymtd, probes, &parts, 0);
+
+        if (nr_parts > 0) {
+                add_mtd_partitions(mymtd, parts, nr_parts);
+                return 0;
+        }
+#endif
+        /* No recognised partitioning schemes found - use defaults */
+        nr_parts = epxa_default_partitions(mymtd, &parts);
+        if (nr_parts > 0) {
+                add_mtd_partitions(mymtd, parts, nr_parts);
+                return 0;
+        }
+
+        /* If all else fails... */
+        add_mtd_device(mymtd);
+        return 0;
+}
+
+static void __exit epxa_mtd_cleanup(void)
+{
+        if (mymtd) {
+                if (nr_parts)
+                        del_mtd_partitions(mymtd);
+                else
+                        del_mtd_device(mymtd);
+                map_destroy(mymtd);
+        }
+        if (epxa_map.virt) {
+                iounmap((void *)epxa_map.virt);
+                epxa_map.virt = 0;
+        }
+}
+
+
+/* 
+ * This will do for now, once we decide which bootldr we're finally 
+ * going to use then we'll remove this function and do it properly
+ *
+ * Partions are currently (as offsets from base of flash):
+ * 0x00000000 - 0x003FFFFF - bootloader (!)
+ * 0x00400000 - 0x00FFFFFF - Flashdisk
+ */
+
+static int __init epxa_default_partitions(struct mtd_info *master, struct mtd_partition **pparts)
+{
+        struct mtd_partition *parts;
+        int ret, i;
+        int npartitions = 0;
+        char *names; 
+        const char *name = "jffs";
+
+        printk("Using default partitions for %s\n",BOARD_NAME);
+        npartitions=1;
+        parts = kmalloc(npartitions*sizeof(*parts)+strlen(name), GFP_KERNEL);
+        memzero(parts,npartitions*sizeof(*parts)+strlen(name));
+        if (!parts) {
+                ret = -ENOMEM;
+                goto out;
+        }
+        i=0;
+        names = (char *)&parts[npartitions];    
+        parts[i].name = names;
+        names += strlen(name) + 1;
+        strcpy(parts[i].name, name);
+
+#ifdef CONFIG_EPXA10DB
+        parts[i].size = FLASH_SIZE-0x00400000;
+        parts[i].offset = 0x00400000;
+#else
+        parts[i].size = FLASH_SIZE-0x00180000;
+        parts[i].offset = 0x00180000;
+#endif
+
+ out:
+        *pparts = parts;
+        return npartitions;
+}
+
+
+module_init(epxa_mtd_init);
+module_exit(epxa_mtd_cleanup);
+
+MODULE_AUTHOR("Clive Davies");
+MODULE_DESCRIPTION("Altera epxa mtd flash map");
+MODULE_LICENSE("GPL");