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path: root/target/linux/brcm63xx-2.6/patches/040-bcm963xx_flashmap.patch
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diff -urN linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c
--- linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c	2006-07-07 22:00:36.000000000 +0200
@@ -0,0 +1,106 @@
+/*
+ * A simple flash mapping code for BCM963xx board flash memory
+ * It is simple because it only treats all the flash memory as ROM
+ * It is used with chips/map_rom.c
+ *
+ *  Song Wang (songw@broadcom.com)
+ */
+
+#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/config.h>
+
+#include <board.h>
+#include <bcmTag.h>
+#define  VERSION	"1.0"
+
+extern PFILE_TAG kerSysImageTagGet(void);
+
+static struct mtd_info *mymtd;
+
+static map_word brcm_physmap_read16(struct map_info *map, unsigned long ofs)
+{
+	map_word val;
+	
+	val.x[0] = __raw_readw(map->map_priv_1 + ofs);
+	
+	return val;
+}
+
+static void brcm_physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+static struct map_info brcm_physmap_map = {
+	.name		= "Physically mapped flash",
+	.bankwidth	= 2,
+	.read		= brcm_physmap_read16,
+	.copy_from	= brcm_physmap_copy_from
+};
+
+static int __init init_brcm_physmap(void)
+{
+        PFILE_TAG pTag = NULL;
+        u_int32_t rootfs_addr, kernel_addr;
+        FLASH_ADDR_INFO info;
+
+	printk("bcm963xx_mtd driver v%s\n", VERSION);
+        kerSysFlashAddrInfoGet( &info );
+
+        /* Read the flash memory map from flash memory. */
+        if (!(pTag = kerSysImageTagGet())) {
+                printk("Failed to read image tag from flash\n");
+                return -EIO;
+        }
+
+        rootfs_addr = (u_int32_t) simple_strtoul(pTag->rootfsAddress, NULL, 10);
+        kernel_addr = (u_int32_t) simple_strtoul(pTag->kernelAddress, NULL, 10);
+	
+	brcm_physmap_map.size = kernel_addr - rootfs_addr;
+	brcm_physmap_map.map_priv_1 = (unsigned long)rootfs_addr;
+
+	if (!brcm_physmap_map.map_priv_1) {
+		printk("Wrong rootfs starting address\n");
+		return -EIO;
+	}
+	
+	if (brcm_physmap_map.size <= 0) {
+		printk("Wrong rootfs size\n");
+		return -EIO;
+	}	
+	
+	mymtd = do_map_probe("map_rom", &brcm_physmap_map);
+	if (mymtd) {
+		mymtd->owner = THIS_MODULE;
+		add_mtd_device(mymtd);
+
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_brcm_physmap(void)
+{
+	if (mymtd) {
+		del_mtd_device(mymtd);
+		map_destroy(mymtd);
+	}
+	if (brcm_physmap_map.map_priv_1) {
+		brcm_physmap_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_brcm_physmap);
+module_exit(cleanup_brcm_physmap);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Song Wang songw@broadcom.com");
+MODULE_DESCRIPTION("Configurable MTD map driver for read-only root file system");
diff -urN linux-2.6.16.7/drivers/mtd/maps/Kconfig linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig
--- linux-2.6.16.7/drivers/mtd/maps/Kconfig	2006-04-17 23:53:25.000000000 +0200
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig	2006-07-07 22:02:13.000000000 +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
+	  This driver seems to detect and provide a valid flash map to the system
+	  of course, it needs checking and testing.
+
 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-2.6.16.7/drivers/mtd/maps/Makefile linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile
--- linux-2.6.16.7/drivers/mtd/maps/Makefile	2006-04-17 23:53:25.000000000 +0200
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile	2006-07-07 22:01:29.000000000 +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.o