openwrt-xburst/target/linux/brcm63xx-2.6/patches/040-bcm963xx_flashmap.patch

diff -urN linux-2.6.17/drivers/mtd/maps/bcm963xx-flash.c linux-2.6.17-brcm63xx/drivers/mtd/maps/bcm963xx-flash.c
--- linux-2.6.17/drivers/mtd/maps/bcm963xx-flash.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.17-brcm63xx/drivers/mtd/maps/bcm963xx-flash.c	2006-08-03 16:29:52.000000000 +0200
@@ -0,0 +1,116 @@
+/*
+ * $Id$
+ * Copyright (C) 2006  Florian Fainelli
+ * Copyright (C) $Date$  $Author$
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/* This is the BCM963xx flash map driver, in its actual state it only supports BCM96348 devices
+ * this driver is able to manage both bootloader we found on these boards : CFE and RedBoot
+ * 
+ * RedBoot :
+ *  - this bootloader allows us to parse partitions and therefore deduce the MTD partition table
+ *
+ * CFE :
+ *   - we have to use a "physically mapped flash" defined bellow
+ *
+ */
+
+#include <asm/io.h>
+#include <linux/init.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#define WINDOW_ADDR 0x1e400000 		/* Real address of the flash */
+#define WINDOW_SIZE 0x800000		/* Size of flash */
+#define BUSWIDTH 2			/* Buswidth */
+
+extern int boot_loader_type;		/* For RedBoot / CFE detection */
+extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
+static struct mtd_partition *parsed_parts;
+
+static void __exit bcm963xx_mtd_cleanup(void);
+
+static struct mtd_info *bcm963xx_mtd_info;
+
+static struct map_info bcm963xx_map = {
+	.name = "bcm963xx",
+	.size = WINDOW_SIZE,
+	.bankwidth = BUSWIDTH,
+	.phys = WINDOW_ADDR,
+};
+
+static struct mtd_partition bcm963xx_parts[] = {
+        { name: "bootloader",  size: 0,        offset: 0,      mask_flags: MTD_WRITEABLE },
+        { name: "rootfs",              size: 0,        offset: 0},
+        { name: "jffs2",        size: 5 * 0x10000,      offset: 57*0x10000}
+};
+
+static int __init bcm963xx_mtd_init(void)
+{
+	printk("bcm963xx: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
+	bcm963xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
+
+	if (!bcm963xx_map.virt) {
+		printk("bcm963xx: Failed to ioremap\n");
+		return -EIO;
+	}
+
+	simple_map_init(&bcm963xx_map);
+
+	bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
+
+	if (bcm963xx_mtd_info) {
+		bcm963xx_mtd_info->owner = THIS_MODULE;
+		int parsed_nr_parts = 0;
+		char * part_type;
+
+#ifdef CONFIG_MTD_REDBOOT_PARTS	
+		if (parsed_nr_parts == 0) {
+			int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
+			if (ret > 0) {
+				part_type = "RedBoot";
+				parsed_nr_parts = ret;
+			}
+		}
+#endif
+		add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
+
+		return 0;
+        }
+	iounmap(bcm963xx_map.virt);
+	return -ENXIO;
+}
+
+static void __exit bcm963xx_mtd_cleanup(void)
+{
+	if (bcm963xx_mtd_info) {
+		del_mtd_partitions(bcm963xx_mtd_info);
+		map_destroy(bcm963xx_mtd_info);
+	}
+
+	if (bcm963xx_map.virt) {
+		iounmap(bcm963xx_map.virt);
+		bcm963xx_map.virt = 0;
+	}
+}
+
+module_init(bcm963xx_mtd_init);
+module_exit(bcm963xx_mtd_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Florian Fainelli");
diff -urN linux-2.6.17/drivers/mtd/maps/Kconfig linux-2.6.17-brcm63xx/drivers/mtd/maps/Kconfig
--- linux-2.6.17/drivers/mtd/maps/Kconfig	2006-06-18 03:49:35.000000000 +0200
+++ linux-2.6.17-brcm63xx/drivers/mtd/maps/Kconfig	2006-08-03 16:32:05.000000000 +0200
@@ -224,6 +224,13 @@
 	  Flash memory access on 4G Systems MTX-1 Board. If you have one of
 	  these boards and would like to use the flash chips on it, say 'Y'.
 
+config MTD_BCM963XX
+        tristate "BCM963xx Flash device"
+        depends on MIPS && MIPS_BRCM
+        help
+	  Flash memory access on BCM963xx boards. Currently only works with
+	  RedBoot, CFE support coming soon.
+
 config MTD_DILNETPC
 	tristate "CFI Flash device mapped on DIL/Net PC"
 	depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
diff -urN linux-2.6.17/drivers/mtd/maps/Makefile linux-2.6.17-brcm63xx/drivers/mtd/maps/Makefile
--- linux-2.6.17/drivers/mtd/maps/Makefile	2006-06-18 03:49:35.000000000 +0200
+++ linux-2.6.17-brcm63xx/drivers/mtd/maps/Makefile	2006-08-03 16:32:27.000000000 +0200
@@ -71,3 +71,4 @@
 obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o
 obj-$(CONFIG_MTD_MTX1)		+= mtx-1_flash.o
 obj-$(CONFIG_MTD_TQM834x)	+= tqm834x.o
+obj-$(CONFIG_MTD_BCM963XX)      += bcm963xx-flash.o
diff -urN linux-2.6.17/drivers/mtd/redboot.c linux-2.6.17-brcm63xx/drivers/mtd/redboot.c
--- linux-2.6.17/drivers/mtd/redboot.c	2006-06-18 03:49:35.000000000 +0200
+++ linux-2.6.17-brcm63xx/drivers/mtd/redboot.c	2006-08-03 16:32:39.000000000 +0200
@@ -39,7 +39,7 @@
 	return 1;
 }
 
-static int parse_redboot_partitions(struct mtd_info *master,
+int parse_redboot_partitions(struct mtd_info *master,
                              struct mtd_partition **pparts,
                              unsigned long fis_origin)
 {
@@ -120,11 +120,19 @@
 		goto out;
 	}
 
+	if (!fis_origin) {
+		for (i = 0; i < numslots; i++) {
+			if (!strncmp(buf[i].name, "RedBoot", 8)) {
+				fis_origin = (buf[i].flash_base & (master->size << 1) - 1);
+			}
+		}
+	}
+
 	for (i = 0; i < numslots; i++) {
 		struct fis_list *new_fl, **prev;
 
 		if (buf[i].name[0] == 0xff)
-			continue;
+			break;
 		if (!redboot_checksum(&buf[i]))
 			break;
 
@@ -135,11 +143,10 @@
 			goto out;
 		}
 		new_fl->img = &buf[i];
-                if (fis_origin) {
-                        buf[i].flash_base -= fis_origin;
-                } else {
-                        buf[i].flash_base &= master->size-1;
-                }
+		if (fis_origin) {
+				buf[i].flash_base -= fis_origin;
+		}
+		buf[i].flash_base &= (master->size << 1) - 1;
 
 		/* I'm sure the JFFS2 code has done me permanent damage.
 		 * I now think the following is _normal_