From fb261916ee9cd9eede57f6255ffd39e4145da48e Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 17 Jul 2011 14:55:18 +0200 Subject: [PATCH 18/26] mtd: bcm47xx: add parallel flash driver Signed-off-by: Hauke Mehrtens --- drivers/mtd/maps/Kconfig | 9 ++ drivers/mtd/maps/Makefile | 1 + drivers/mtd/maps/bcm47xx-pflash.c | 198 +++++++++++++++++++++++++++++++++++++ 3 files changed, 208 insertions(+), 0 deletions(-) create mode 100644 drivers/mtd/maps/bcm47xx-pflash.c --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -264,6 +264,15 @@ 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 @@ -60,3 +60,4 @@ 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 +1,198 @@ +/* + * Copyright (C) 2006 Felix Fietkau + * Copyright (C) 2005 Waldemar Brodkorb + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; + struct mtd_partition *partitions = NULL; + int num_partitions = 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); + + num_partitions = parse_mtd_partitions(bcm47xx_mtd, probes, &partitions, 0); + if (num_partitions < 0) { + ret = num_partitions; + goto err_unmap; + } + + ret = mtd_device_register(bcm47xx_mtd, partitions, num_partitions); + +// ret = mtd_device_parse_register(bcm47xx_mtd, "bcm47xx", 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");