mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-09-20 02:24:45 +03:00
136 lines
4.1 KiB
Diff
136 lines
4.1 KiB
Diff
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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
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--- linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c 2006-07-07 22:00:36.000000000 +0200
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@@ -0,0 +1,106 @@
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+/*
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+ * A simple flash mapping code for BCM963xx board flash memory
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+ * It is simple because it only treats all the flash memory as ROM
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+ * It is used with chips/map_rom.c
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+ *
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+ * Song Wang (songw@broadcom.com)
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <asm/io.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#include <linux/config.h>
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+
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+#include <board.h>
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+#include <bcmTag.h>
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+#define VERSION "1.0"
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+
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+extern PFILE_TAG kerSysImageTagGet(void);
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+
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+static struct mtd_info *mymtd;
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+
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+static map_word brcm_physmap_read16(struct map_info *map, unsigned long ofs)
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+{
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+ map_word val;
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+
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+ val.x[0] = __raw_readw(map->map_priv_1 + ofs);
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+
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+ return val;
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+}
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+
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+static void brcm_physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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+{
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+ memcpy_fromio(to, map->map_priv_1 + from, len);
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+}
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+
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+static struct map_info brcm_physmap_map = {
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+ .name = "Physically mapped flash",
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+ .bankwidth = 2,
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+ .read = brcm_physmap_read16,
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+ .copy_from = brcm_physmap_copy_from
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+};
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+
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+static int __init init_brcm_physmap(void)
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+{
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+ PFILE_TAG pTag = NULL;
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+ u_int32_t rootfs_addr, kernel_addr;
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+ FLASH_ADDR_INFO info;
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+
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+ printk("bcm963xx_mtd driver v%s\n", VERSION);
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+ kerSysFlashAddrInfoGet( &info );
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+
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+ /* Read the flash memory map from flash memory. */
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+ if (!(pTag = kerSysImageTagGet())) {
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+ printk("Failed to read image tag from flash\n");
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+ return -EIO;
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+ }
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+
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+ rootfs_addr = (u_int32_t) simple_strtoul(pTag->rootfsAddress, NULL, 10);
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+ kernel_addr = (u_int32_t) simple_strtoul(pTag->kernelAddress, NULL, 10);
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+
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+ brcm_physmap_map.size = kernel_addr - rootfs_addr;
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+ brcm_physmap_map.map_priv_1 = (unsigned long)rootfs_addr;
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+
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+ if (!brcm_physmap_map.map_priv_1) {
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+ printk("Wrong rootfs starting address\n");
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+ return -EIO;
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+ }
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+
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+ if (brcm_physmap_map.size <= 0) {
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+ printk("Wrong rootfs size\n");
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+ return -EIO;
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+ }
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+
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+ mymtd = do_map_probe("map_rom", &brcm_physmap_map);
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+ if (mymtd) {
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+ mymtd->owner = THIS_MODULE;
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+ add_mtd_device(mymtd);
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+
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+ return 0;
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+ }
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+
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+ return -ENXIO;
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+}
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+
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+static void __exit cleanup_brcm_physmap(void)
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+{
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+ if (mymtd) {
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+ del_mtd_device(mymtd);
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+ map_destroy(mymtd);
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+ }
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+ if (brcm_physmap_map.map_priv_1) {
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+ brcm_physmap_map.map_priv_1 = 0;
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+ }
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+}
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+
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+module_init(init_brcm_physmap);
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+module_exit(cleanup_brcm_physmap);
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+
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Song Wang songw@broadcom.com");
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+MODULE_DESCRIPTION("Configurable MTD map driver for read-only root file system");
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diff -urN linux-2.6.16.7/drivers/mtd/maps/Kconfig linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig
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--- linux-2.6.16.7/drivers/mtd/maps/Kconfig 2006-04-17 23:53:25.000000000 +0200
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+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig 2006-07-07 22:02:13.000000000 +0200
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@@ -224,6 +224,13 @@
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Flash memory access on 4G Systems MTX-1 Board. If you have one of
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these boards and would like to use the flash chips on it, say 'Y'.
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+config MTD_BCM963XX
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+ tristate "BCM963xx Flash device"
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+ depends on MIPS && MIPS_BRCM
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+ help
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+ This driver seems to detect and provide a valid flash map to the system
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+ of course, it needs checking and testing.
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+
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config MTD_DILNETPC
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tristate "CFI Flash device mapped on DIL/Net PC"
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depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
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diff -urN linux-2.6.16.7/drivers/mtd/maps/Makefile linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile
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--- linux-2.6.16.7/drivers/mtd/maps/Makefile 2006-04-17 23:53:25.000000000 +0200
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+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile 2006-07-07 22:01:29.000000000 +0200
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@@ -71,3 +71,4 @@
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obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
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obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
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obj-$(CONFIG_MTD_TQM834x) += tqm834x.o
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+obj-$(CONFIG_MTD_BCM963XX) += bcm963xx.o
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