--- /dev/null
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -248,6 +248,15 @@ config MTD_LANTIQ
+ help
+ Support for NOR flash attached to the Lantiq SoC's External Bus Unit.
+
++config MTD_BCM47XX_PFLASH
++ tristate "bcm47xx parallel flash support"
++ default y
++ depends on BCM47XX
++ select MTD_PARTITIONS
++ select MTD_BCM47XX_PARTS
++ help
++ Support for bcm47xx parallel flash
++
+ config MTD_DILNETPC
+ tristate "CFI Flash device mapped on DIL/Net PC"
+ depends on X86 && MTD_CFI_INTELEXT && BROKEN
+--- a/drivers/mtd/maps/Makefile
++++ b/drivers/mtd/maps/Makefile
+@@ -57,3 +57,4 @@ obj-$(CONFIG_MTD_VMU) += vmu-flash.o
+ obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
+ obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
+ obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
++obj-$(CONFIG_MTD_BCM47XX_PFLASH)+= bcm47xx-pflash.o
+--- /dev/null
++++ b/drivers/mtd/maps/bcm47xx-pflash.c
+@@ -0,0 +1,196 @@
++/*
++ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
++ * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
++ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
++ *
++ * original functions for finding root filesystem from Mike Baker
++ *
++ * 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.
++ *
++ * Copyright 2001-2003, Broadcom Corporation
++ * All Rights Reserved.
++ *
++ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
++ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
++ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
++ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
++ *
++ * Flash mapping for BCM947XX boards
++ */
++
++#define pr_fmt(fmt) "bcm47xx_pflash: " fmt
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/map.h>
++#include <linux/mtd/partitions.h>
++#include <linux/io.h>
++#include <asm/mach-bcm47xx/bcm47xx.h>
++#include <linux/platform_device.h>
++
++#define WINDOW_ADDR 0x1fc00000
++#define WINDOW_SIZE 0x400000
++#define BUSWIDTH 2
++
++static struct mtd_info *bcm47xx_mtd;
++
++static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
++{
++ if (len == 1) {
++ memcpy_fromio(to, map->virt + from, len);
++ } else {
++ int i;
++ u16 *dest = (u16 *) to;
++ u16 *src = (u16 *) (map->virt + from);
++ for (i = 0; i < (len / 2); i++)
++ dest[i] = src[i];
++ if (len & 1)
++ *((u8 *)dest+len-1) = src[i] & 0xff;
++ }
++}
++
++static struct map_info bcm47xx_map = {
++ name: "Physically mapped flash",
++ size : WINDOW_SIZE,
++ bankwidth : BUSWIDTH,
++ phys : WINDOW_ADDR,
++};
++
++static const char *probes[] = { "bcm47xx", NULL };
++
++static int bcm47xx_pflash_probe(struct platform_device *pdev)
++{
++#ifdef CONFIG_BCM47XX_SSB
++ struct ssb_mipscore *ssb_mcore;
++#endif
++#ifdef CONFIG_BCM47XX_BCMA
++ struct bcma_drv_cc *bcma_cc;
++#endif
++ int ret = 0;
++
++ switch (bcm47xx_bus_type) {
++#ifdef CONFIG_BCM47XX_SSB
++ case BCM47XX_BUS_TYPE_SSB:
++ ssb_mcore = &bcm47xx_bus.ssb.mipscore;
++ if (!ssb_mcore->pflash.present)
++ return -ENODEV;
++
++ bcm47xx_map.phys = ssb_mcore->pflash.window;
++ bcm47xx_map.size = ssb_mcore->pflash.window_size;
++ bcm47xx_map.bankwidth = ssb_mcore->pflash.buswidth;
++ break;
++#endif
++#ifdef CONFIG_BCM47XX_BCMA
++ case BCM47XX_BUS_TYPE_BCMA:
++ bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
++ if (!bcma_cc->pflash.present)
++ return -ENODEV;
++
++ bcm47xx_map.phys = bcma_cc->pflash.window;
++ bcm47xx_map.size = bcma_cc->pflash.window_size;
++ bcm47xx_map.bankwidth = bcma_cc->pflash.buswidth;
++ break;
++#endif
++ }
++
++ pr_notice("flash init: 0x%08x 0x%08lx\n", bcm47xx_map.phys, bcm47xx_map.size);
++ bcm47xx_map.virt = ioremap_nocache(bcm47xx_map.phys, bcm47xx_map.size);
++
++ if (!bcm47xx_map.virt) {
++ pr_err("Failed to ioremap\n");
++ return -EIO;
++ }
++
++ simple_map_init(&bcm47xx_map);
++ /* override copy_from routine */
++ bcm47xx_map.copy_from = bcm47xx_map_copy_from;
++
++ bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map);
++ if (!bcm47xx_mtd) {
++ pr_err("Failed to do_map_probe\n");
++ ret = -ENXIO;
++ goto err_unmap;
++ }
++ bcm47xx_mtd->owner = THIS_MODULE;
++
++ pr_notice("Flash device: 0x%lx at 0x%x\n", bcm47xx_map.size, WINDOW_ADDR);
++
++ ret = mtd_device_parse_register(bcm47xx_mtd, probes, NULL, NULL, 0);
++
++ if (ret) {
++ pr_err("Flash: mtd_device_register failed\n");
++ goto err_destroy;
++ }
++ return 0;
++
++err_destroy:
++ map_destroy(bcm47xx_mtd);
++err_unmap:
++ iounmap(bcm47xx_map.virt);
++ return ret;
++}
++
++static int __devexit bcm47xx_pflash_remove(struct platform_device *pdev)
++{
++ mtd_device_unregister(bcm47xx_mtd);
++ map_destroy(bcm47xx_mtd);
++ iounmap(bcm47xx_map.virt);
++ return 0;
++}
++
++static const struct platform_device_id bcm47xx_pflash_table[] = {
++ { "bcm47xx-pflash", 0 },
++ { }
++};
++MODULE_DEVICE_TABLE(platform, bcm47xx_pflash_table);
++
++static struct platform_driver bcm47xx_pflash_driver = {
++ .id_table = bcm47xx_pflash_table,
++ .probe = bcm47xx_pflash_probe,
++ .remove = __devexit_p(bcm47xx_pflash_remove),
++ .driver = {
++ .name = "bcm47xx-pflash",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init init_bcm47xx_pflash(void)
++{
++ int ret = platform_driver_register(&bcm47xx_pflash_driver);
++
++ if (ret)
++ pr_err("error registering platform driver: %i\n", ret);
++ return ret;
++}
++
++static void __exit exit_bcm47xx_pflash(void)
++{
++ platform_driver_unregister(&bcm47xx_pflash_driver);
++}
++
++module_init(init_bcm47xx_pflash);
++module_exit(exit_bcm47xx_pflash);
++
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("BCM47XX parallel flash driver");
projects / openwrt.git / blobdiff