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