217 lines
6.4 KiB
Diff
217 lines
6.4 KiB
Diff
--- a/drivers/mtd/maps/Kconfig
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+++ b/drivers/mtd/maps/Kconfig
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@@ -248,6 +248,15 @@ config MTD_LANTIQ
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help
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Support for NOR flash attached to the Lantiq SoC's External Bus Unit.
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+config MTD_BCM47XX_PFLASH
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+ tristate "bcm47xx parallel flash support"
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+ default y
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+ depends on BCM47XX
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+ select MTD_PARTITIONS
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+ select MTD_BCM47XX_PARTS
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+ help
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+ Support for bcm47xx parallel flash
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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_CFI_INTELEXT && BROKEN
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--- a/drivers/mtd/maps/Makefile
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+++ b/drivers/mtd/maps/Makefile
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@@ -57,3 +57,4 @@ obj-$(CONFIG_MTD_VMU) += vmu-flash.o
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obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
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obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
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obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
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+obj-$(CONFIG_MTD_BCM47XX_PFLASH)+= bcm47xx-pflash.o
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--- /dev/null
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+++ b/drivers/mtd/maps/bcm47xx-pflash.c
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@@ -0,0 +1,188 @@
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+/*
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+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
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+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
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+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
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+ *
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+ * original functions for finding root filesystem from Mike Baker
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ * Copyright 2001-2003, Broadcom Corporation
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+ * All Rights Reserved.
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+ *
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+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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+ *
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+ * Flash mapping for BCM947XX boards
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+ */
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+
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+#define pr_fmt(fmt) "bcm47xx_pflash: " fmt
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+#include <linux/init.h>
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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/sched.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/mtd/partitions.h>
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+#include <linux/io.h>
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+#include <asm/mach-bcm47xx/bcm47xx.h>
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+#include <linux/platform_device.h>
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+
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+#define WINDOW_ADDR 0x1fc00000
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+#define WINDOW_SIZE 0x400000
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+#define BUSWIDTH 2
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+
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+static struct mtd_info *bcm47xx_mtd;
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+
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+static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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+{
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+ if (len == 1) {
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+ memcpy_fromio(to, map->virt + from, len);
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+ } else {
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+ int i;
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+ u16 *dest = (u16 *) to;
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+ u16 *src = (u16 *) (map->virt + from);
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+ for (i = 0; i < (len / 2); i++)
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+ dest[i] = src[i];
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+ if (len & 1)
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+ *((u8 *)dest+len-1) = src[i] & 0xff;
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+ }
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+}
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+
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+static struct map_info bcm47xx_map = {
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+ name: "Physically mapped flash",
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+ size : WINDOW_SIZE,
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+ bankwidth : BUSWIDTH,
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+ phys : WINDOW_ADDR,
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+};
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+
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+static const char *probes[] = { "bcm47xx", NULL };
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+
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+static int bcm47xx_mtd_probe(struct platform_device *pdev)
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+{
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+#ifdef CONFIG_BCM47XX_SSB
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+ struct ssb_chipcommon *ssb_cc;
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+#endif
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+#ifdef CONFIG_BCM47XX_BCMA
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+ struct bcma_drv_cc *bcma_cc;
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+#endif
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+ int ret = 0;
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+
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+ switch (bcm47xx_bus_type) {
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+#ifdef CONFIG_BCM47XX_SSB
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+ case BCM47XX_BUS_TYPE_SSB:
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+ ssb_cc = &bcm47xx_bus.ssb.chipco;
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+ if (ssb_cc->flash_type != SSB_PFLASH)
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+ return -ENODEV;
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+
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+ bcm47xx_map.phys = ssb_cc->pflash.window;
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+ bcm47xx_map.size = ssb_cc->pflash.window_size;
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+ bcm47xx_map.bankwidth = ssb_cc->pflash.buswidth;
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+ break;
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+#endif
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+#ifdef CONFIG_BCM47XX_BCMA
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+ case BCM47XX_BUS_TYPE_BCMA:
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+ bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
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+ if (bcma_cc->flash_type != BCMA_PFLASH)
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+ return -ENODEV;
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+
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+ bcm47xx_map.phys = bcma_cc->pflash.window;
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+ bcm47xx_map.size = bcma_cc->pflash.window_size;
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+ bcm47xx_map.bankwidth = bcma_cc->pflash.buswidth;
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+ break;
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+#endif
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+ }
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+
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+ pr_notice("flash init: 0x%08x 0x%08lx\n", bcm47xx_map.phys, bcm47xx_map.size);
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+ bcm47xx_map.virt = ioremap_nocache(bcm47xx_map.phys, bcm47xx_map.size);
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+
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+ if (!bcm47xx_map.virt) {
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+ pr_err("Failed to ioremap\n");
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+ return -EIO;
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+ }
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+
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+ simple_map_init(&bcm47xx_map);
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+ /* override copy_from routine */
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+ bcm47xx_map.copy_from = bcm47xx_map_copy_from;
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+
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+ bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map);
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+ if (!bcm47xx_mtd) {
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+ pr_err("Failed to do_map_probe\n");
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+ ret = -ENXIO;
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+ goto err_unmap;
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+ }
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+ bcm47xx_mtd->owner = THIS_MODULE;
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+
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+ pr_notice("Flash device: 0x%lx at 0x%x\n", bcm47xx_map.size, WINDOW_ADDR);
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+
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+ ret = mtd_device_parse_register(bcm47xx_mtd, probes, NULL, NULL, 0);
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+
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+ if (ret) {
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+ pr_err("Flash: mtd_device_register failed\n");
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+ goto err_destroy;
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+ }
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+ return 0;
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+
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+err_destroy:
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+ map_destroy(bcm47xx_mtd);
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+err_unmap:
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+ iounmap(bcm47xx_map.virt);
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+ return ret;
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+}
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+
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+static int __devexit bcm47xx_mtd_remove(struct platform_device *pdev)
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+{
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+ mtd_device_unregister(bcm47xx_mtd);
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+ map_destroy(bcm47xx_mtd);
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+ iounmap(bcm47xx_map.virt);
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+ return 0;
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+}
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+
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+static struct platform_driver bcm47xx_mtd_driver = {
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+ .remove = __devexit_p(bcm47xx_mtd_remove),
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+ .driver = {
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+ .name = "bcm47xx_pflash",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+static int __init init_bcm47xx_mtd(void)
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+{
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+ int ret = platform_driver_probe(&bcm47xx_mtd_driver, bcm47xx_mtd_probe);
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+
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+ if (ret)
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+ pr_err("error registering platform driver: %i\n", ret);
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+ return ret;
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+}
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+
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+static void __exit exit_bcm47xx_mtd(void)
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+{
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+ platform_driver_unregister(&bcm47xx_mtd_driver);
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+}
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+
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+module_init(init_bcm47xx_mtd);
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+module_exit(exit_bcm47xx_mtd);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("BCM47XX parallel flash driver");
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