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openwrt-xburst/target/linux/brcm47xx/patches-3.2/026-mtd-bcm47xx-add-parallel-flash-driver.patch
hauke 40687c5162 brcm47xx: move and rename the patches 
The patches are now grouped by the part what they are doing and are using three digest numbers.

This does not remove or adds anything


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30942 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-03-14 21:48:23 +00:00

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From 36f8b899174a445a98fe02ed8d1db177525f0c52 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 17 Jul 2011 14:55:18 +0200
Subject: [PATCH 07/15] mtd: bcm47xx: add parallel flash driver
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
drivers/mtd/maps/Kconfig | 9 ++
drivers/mtd/maps/Makefile | 1 +
drivers/mtd/maps/bcm47xx-pflash.c | 188 +++++++++++++++++++++++++++++++++++++
3 files changed, 198 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/maps/bcm47xx-pflash.c
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -257,6 +257,15 @@ 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
@@ -58,3 +58,4 @@ obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr
obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-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 +1,188 @@
+/*
+ * 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_mtd_probe(struct platform_device *pdev)
+{
+#ifdef CONFIG_BCM47XX_SSB
+ struct ssb_chipcommon *ssb_cc;
+#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_cc = &bcm47xx_bus.ssb.chipco;
+ if (ssb_cc->flash_type != SSB_PFLASH)
+ return -ENODEV;
+
+ bcm47xx_map.phys = ssb_cc->pflash.window;
+ bcm47xx_map.size = ssb_cc->pflash.window_size;
+ bcm47xx_map.bankwidth = ssb_cc->pflash.buswidth;
+ break;
+#endif
+#ifdef CONFIG_BCM47XX_BCMA
+ case BCM47XX_BUS_TYPE_BCMA:
+ bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
+ if (bcma_cc->flash_type != BCMA_PFLASH)
+ 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_mtd_remove(struct platform_device *pdev)
+{
+ mtd_device_unregister(bcm47xx_mtd);
+ map_destroy(bcm47xx_mtd);
+ iounmap(bcm47xx_map.virt);
+ return 0;
+}
+
+static struct platform_driver bcm47xx_mtd_driver = {
+ .remove = __devexit_p(bcm47xx_mtd_remove),
+ .driver = {
+ .name = "bcm47xx_pflash",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init init_bcm47xx_mtd(void)
+{
+ int ret = platform_driver_probe(&bcm47xx_mtd_driver, bcm47xx_mtd_probe);
+
+ if (ret)
+ pr_err("error registering platform driver: %i\n", ret);
+ return ret;
+}
+
+static void __exit exit_bcm47xx_mtd(void)
+{
+ platform_driver_unregister(&bcm47xx_mtd_driver);
+}
+
+module_init(init_bcm47xx_mtd);
+module_exit(exit_bcm47xx_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("BCM47XX parallel flash driver");
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