diff options
Diffstat (limited to 'drivers/mtd/maps')
| -rw-r--r-- | drivers/mtd/maps/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/mtd/maps/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/maps/mxc_nor.c | 181 |
3 files changed, 192 insertions, 0 deletions
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index f22bc9f05ddb..5362bc4a000d 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -551,4 +551,14 @@ config MTD_PISMO When built as a module, it will be called pismo.ko +config MTD_MXC + bool "Map driver for Freescale MXC boards" + depends on MTD && ARCH_MXC + default y + select MTD_CFI + select MTD_PARTITIONS + help + This enables access to the flash chips on Freescale MXC based + platforms. If you have such a board, say 'Y'. + endmenu diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile index bb035cd54c72..556db2ec6253 100644 --- a/drivers/mtd/maps/Makefile +++ b/drivers/mtd/maps/Makefile @@ -59,3 +59,4 @@ obj-$(CONFIG_MTD_BFIN_ASYNC) += bfin-async-flash.o obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o obj-$(CONFIG_MTD_VMU) += vmu-flash.o obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o +obj-$(CONFIG_MTD_MXC) += mxc_nor.o diff --git a/drivers/mtd/maps/mxc_nor.c b/drivers/mtd/maps/mxc_nor.c new file mode 100644 index 000000000000..d969f95a67a3 --- /dev/null +++ b/drivers/mtd/maps/mxc_nor.c @@ -0,0 +1,181 @@ +/* + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * (c) 2005 MontaVista Software, Inc. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/ioport.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> +#include <linux/clocksource.h> +#include <asm/mach-types.h> +#include <asm/mach/flash.h> + +#define DVR_VER "2.0" + +#ifdef CONFIG_MTD_PARTITIONS +static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL }; +#endif + +struct mxcflash_info { + struct mtd_partition *parts; + struct mtd_info *mtd; + struct map_info map; +}; + +/*! + * @defgroup NOR_MTD NOR Flash MTD Driver + */ + +/*! + * @file mxc_nor.c + * + * @brief This file contains the MTD Mapping information on the MXC. + * + * @ingroup NOR_MTD + */ + +static int __devinit mxcflash_probe(struct platform_device *pdev) +{ + int err, nr_parts = 0; + struct mxcflash_info *info; + struct flash_platform_data *flash = pdev->dev.platform_data; + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; + + info = kzalloc(sizeof(struct mxcflash_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + if (!request_mem_region(res->start, size, "flash")) { + err = -EBUSY; + goto out_free_info; + } + info->map.virt = ioremap(res->start, size); + if (!info->map.virt) { + err = -ENOMEM; + goto out_release_mem_region; + } + info->map.name = dev_name(&pdev->dev); + info->map.phys = res->start; + info->map.size = size; + info->map.bankwidth = flash->width; + + simple_map_init(&info->map); + info->mtd = do_map_probe(flash->map_name, &info->map); + if (!info->mtd) { + err = -EIO; + goto out_iounmap; + } + info->mtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + nr_parts = + parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0); + if (nr_parts > 0) { + add_mtd_partitions(info->mtd, info->parts, nr_parts); + } else if (flash->parts) { + add_mtd_partitions(info->mtd, flash->parts, flash->nr_parts); + } else +#endif + { + printk(KERN_NOTICE "MXC flash: no partition info " + "available, registering whole flash\n"); + add_mtd_device(info->mtd); + } + + platform_set_drvdata(pdev, info); + return 0; + + out_iounmap: + iounmap(info->map.virt); + out_release_mem_region: + release_mem_region(res->start, size); + out_free_info: + kfree(info); + + return err; +} + +static int __devexit mxcflash_remove(struct platform_device *pdev) +{ + + struct mxcflash_info *info = platform_get_drvdata(pdev); + struct flash_platform_data *flash = pdev->dev.platform_data; + + platform_set_drvdata(pdev, NULL); + + if (info) { + if (info->parts) { + del_mtd_partitions(info->mtd); + kfree(info->parts); + } else if (flash->parts) + del_mtd_partitions(info->mtd); + else + del_mtd_device(info->mtd); + + map_destroy(info->mtd); + release_mem_region(info->map.phys, info->map.size); + iounmap((void __iomem *)info->map.virt); + kfree(info); + } + return 0; +} + +static struct platform_driver mxcflash_driver = { + .driver = { + .name = "mxc_nor_flash", + }, + .probe = mxcflash_probe, + .remove = __devexit_p(mxcflash_remove), +}; + +/*! + * This is the module's entry function. It passes board specific + * config details into the MTD physmap driver which then does the + * real work for us. After this function runs, our job is done. + * + * @return 0 if successful; non-zero otherwise + */ +static int __init mxc_mtd_init(void) +{ + pr_info("MXC MTD nor Driver %s\n", DVR_VER); + if (platform_driver_register(&mxcflash_driver) != 0) { + printk(KERN_ERR "Driver register failed for mxcflash_driver\n"); + return -ENODEV; + } + return 0; +} + +/*! + * This function is the module's exit function. It's empty because the + * MTD physmap driver is doing the real work and our job was done after + * mxc_mtd_init() runs. + */ +static void __exit mxc_mtd_exit(void) +{ + platform_driver_unregister(&mxcflash_driver); +} + +module_init(mxc_mtd_init); +module_exit(mxc_mtd_exit); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("MTD map and partitions for Freescale MXC boards"); +MODULE_LICENSE("GPL"); |