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

• Lines: 174
• Date: 2003-06-13 07:51:34.000000000 -0700
• Orig file: linux-2.4.20/drivers/mtd/maps/redwood.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/mtd/maps/redwood.c linux-2.4.21/drivers/mtd/maps/redwood.c
@@ -0,0 +1,173 @@
+/*
+ * $Id:
+ *
+ * redwood.c - mapper for IBM Redwood-4/5 board.
+ *	
+ * Copyright 2001 MontaVista Softare Inc. 
+ *  
+ * 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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *  
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  History: 12/17/2001 - Armin
+ *  		migrated to use do_map_probe
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+
+#define WINDOW_ADDR 0xffc00000
+#define WINDOW_SIZE 0x00400000
+
+__u8 redwood_flash_read8(struct map_info *map, unsigned long ofs)
+{
+        return *(__u8 *)(map->map_priv_1 + ofs);
+}
+
+__u16 redwood_flash_read16(struct map_info *map, unsigned long ofs)
+{
+        return *(__u16 *)(map->map_priv_1 + ofs);
+}
+
+__u32 redwood_flash_read32(struct map_info *map, unsigned long ofs)
+{
+        return *(volatile unsigned int *)(map->map_priv_1 + ofs);
+}
+
+void redwood_flash_copy_from(struct map_info *map, void *to,
+                             unsigned long from, ssize_t len)
+{
+        memcpy(to, (void *)(map->map_priv_1 + from), len);
+}
+
+void redwood_flash_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+        *(__u8 *)(map->map_priv_1 + adr) = d;
+}
+
+void redwood_flash_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+        *(__u16 *)(map->map_priv_1 + adr) = d;
+}
+
+void redwood_flash_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+        *(__u32 *)(map->map_priv_1 + adr) = d;
+}
+
+void redwood_flash_copy_to(struct map_info *map, unsigned long to,
+                           const void *from, ssize_t len)
+{
+        memcpy((void *)(map->map_priv_1 + to), from, len);
+}
+
+struct map_info redwood_flash_map = {
+        name: "IBM Redwood",
+        size: WINDOW_SIZE,
+        buswidth: 2,
+        read8: redwood_flash_read8,
+        read16: redwood_flash_read16,
+        read32: redwood_flash_read32,
+        copy_from: redwood_flash_copy_from,
+        write8: redwood_flash_write8,
+        write16: redwood_flash_write16,
+        write32: redwood_flash_write32,
+        copy_to: redwood_flash_copy_to
+};
+
+
+static struct mtd_partition redwood_flash_partitions[] = {
+        {
+                name: "Redwood OpenBIOS Vital Product Data",
+                offset: 0,
+                size:   0x10000,
+                mask_flags: MTD_WRITEABLE       /* force read-only */
+        },
+        {
+                name: "Redwood kernel",
+                offset: 0x10000,
+                size:   0x200000 - 0x10000
+        },
+        {
+                name: "Redwood OpenBIOS non-volatile storage",
+                offset: 0x200000,
+                size:   0x10000,
+                mask_flags: MTD_WRITEABLE       /* force read-only */
+        },
+        {
+                name: "Redwood filesystem",
+                offset: 0x210000,
+                size:   0x200000 - (0x10000 + 0x20000)
+        },
+        {
+                name: "Redwood OpenBIOS",
+                offset: 0x3e0000,
+                size:   0x20000,
+                mask_flags: MTD_WRITEABLE       /* force read-only */
+        }
+};
+#define NUM_REDWOOD_FLASH_PARTITIONS \
+        (sizeof(redwood_flash_partitions)/sizeof(redwood_flash_partitions[0]))
+
+static struct mtd_info *redwood_mtd;
+
+int __init init_redwood_flash(void)
+{
+        printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
+               WINDOW_SIZE, WINDOW_ADDR);
+
+        redwood_flash_map.map_priv_1 =
+                (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
+
+        if (!redwood_flash_map.map_priv_1) {
+                printk("init_redwood_flash: failed to ioremap\n");
+                return -EIO;
+        }
+
+        redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
+
+        if (redwood_mtd) {
+                redwood_mtd->module = THIS_MODULE;
+                return add_mtd_partitions(redwood_mtd,
+                                          redwood_flash_partitions,
+                                          NUM_REDWOOD_FLASH_PARTITIONS);
+        }
+
+        return -ENXIO;
+}
+
+static void __exit cleanup_redwood_flash(void)
+{
+        if (redwood_mtd) {
+                del_mtd_partitions(redwood_mtd);
+                iounmap((void *)redwood_flash_map.map_priv_1);
+                map_destroy(redwood_mtd);
+        }
+}
+
+module_init(init_redwood_flash);
+module_exit(cleanup_redwood_flash);