diff options
Diffstat (limited to 'drivers/mtd/onenand')
| -rw-r--r-- | drivers/mtd/onenand/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/mtd/onenand/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/onenand/generic.c | 147 |
3 files changed, 155 insertions, 0 deletions
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig index 08a32a53a37..666ad321773 100644 --- a/drivers/mtd/onenand/Kconfig +++ b/drivers/mtd/onenand/Kconfig @@ -23,6 +23,13 @@ config MTD_ONENAND_VERIFY_WRITE device thinks the write was successful, a bit could have been flipped accidentaly due to device wear or something else. +config MTD_ONENAND_GENERIC + tristate "OneNAND Flash device on generic board" + depends on MTD_ONENAND + help + Support for OneNAND flash on generic board. Using device driver + framework, now all most platfrom are support. + config MTD_ONENAND_OMAP tristate "OneNAND Flash device on OMAP board" depends on ARCH_OMAP && MTD_ONENAND diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile index 932301a888e..e2a96549fcd 100644 --- a/drivers/mtd/onenand/Makefile +++ b/drivers/mtd/onenand/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_MTD_ONENAND) += onenand.o # Board specific. +obj-$(CONFIG_MTD_ONENAND_GENERIC) += generic.o obj-$(CONFIG_MTD_ONENAND_OMAP) += omap-onenand.o # Simulator diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c new file mode 100644 index 00000000000..48cce431f89 --- /dev/null +++ b/drivers/mtd/onenand/generic.c @@ -0,0 +1,147 @@ +/* + * linux/drivers/mtd/onenand/generic.c + * + * Copyright (c) 2005 Samsung Electronics + * Kyungmin Park <kyungmin.park@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Overview: + * This is a device driver for the OneNAND flash for generic boards. + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/onenand.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> +#include <asm/mach/flash.h> + +#define DRIVER_NAME "onenand" + + +#ifdef CONFIG_MTD_PARTITIONS +static const char *part_probes[] = { "cmdlinepart", NULL, }; +#endif + +struct onenand_info { + struct mtd_info mtd; + struct mtd_partition *parts; + struct onenand_chip onenand; +}; + +static int __devinit generic_onenand_probe(struct device *dev) +{ + struct onenand_info *info; + struct platform_device *pdev = to_platform_device(dev); + struct onenand_platform_data *pdata = pdev->dev.platform_data; + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; + int err; + + info = kmalloc(sizeof(struct onenand_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + memset(info, 0, sizeof(struct onenand_info)); + + if (!request_mem_region(res->start, size, dev->driver->name)) { + err = -EBUSY; + goto out_free_info; + } + + info->onenand.base = ioremap(res->start, size); + if (!info->onenand.base) { + err = -ENOMEM; + goto out_release_mem_region; + } + + info->onenand.mmcontrol = pdata->mmcontrol; + + info->mtd.name = pdev->dev.bus_id; + info->mtd.priv = &info->onenand; + info->mtd.owner = THIS_MODULE; + + if (onenand_scan(&info->mtd, 1)) { + err = -ENXIO; + goto out_iounmap; + } + +#ifdef CONFIG_MTD_PARTITIONS + err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0); + if (err > 0) + add_mtd_partitions(&info->mtd, info->parts, err); + else if (err < 0 && pdata->parts) + add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts); + else +#endif + err = add_mtd_device(&info->mtd); + + dev_set_drvdata(&pdev->dev, info); + + return 0; + +out_iounmap: + iounmap(info->onenand.base); +out_release_mem_region: + release_mem_region(res->start, size); +out_free_info: + kfree(info); + + return err; +} + +static int __devexit generic_onenand_remove(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct onenand_info *info = dev_get_drvdata(&pdev->dev); + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; + + dev_set_drvdata(&pdev->dev, NULL); + + if (info) { + if (info->parts) + del_mtd_partitions(&info->mtd); + else + del_mtd_device(&info->mtd); + + onenand_release(&info->mtd); + release_mem_region(res->start, size); + iounmap(info->onenand.base); + kfree(info); + } + + return 0; +} + +static struct device_driver generic_onenand_driver = { + .name = DRIVER_NAME, + .bus = &platform_bus_type, + .probe = generic_onenand_probe, + .remove = __devexit_p(generic_onenand_remove), +}; + +MODULE_ALIAS(DRIVER_NAME); + +static int __init generic_onenand_init(void) +{ + return driver_register(&generic_onenand_driver); +} + +static void __exit generic_onenand_exit(void) +{ + driver_unregister(&generic_onenand_driver); +} + +module_init(generic_onenand_init); +module_exit(generic_onenand_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); +MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards"); |