diff options
Diffstat (limited to 'drivers/mtd/onenand/generic.c')
| -rw-r--r-- | drivers/mtd/onenand/generic.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c new file mode 100644 index 00000000..1c4f97c6 --- /dev/null +++ b/drivers/mtd/onenand/generic.c @@ -0,0 +1,123 @@ +/* + * 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/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/onenand.h> +#include <linux/mtd/partitions.h> +#include <asm/io.h> + +/* + * Note: Driver name and platform data format have been updated! + * + * This version of the driver is named "onenand-flash" and takes struct + * onenand_platform_data as platform data. The old ARM-specific version + * with the name "onenand" used to take struct flash_platform_data. + */ +#define DRIVER_NAME "onenand-flash" + +struct onenand_info { + struct mtd_info mtd; + struct onenand_chip onenand; +}; + +static int __devinit generic_onenand_probe(struct platform_device *pdev) +{ + struct onenand_info *info; + struct onenand_platform_data *pdata = pdev->dev.platform_data; + struct resource *res = pdev->resource; + unsigned long size = resource_size(res); + int err; + + info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) { + 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 ? pdata->mmcontrol : 0; + info->onenand.irq = platform_get_irq(pdev, 0); + + info->mtd.name = dev_name(&pdev->dev); + info->mtd.priv = &info->onenand; + info->mtd.owner = THIS_MODULE; + + if (onenand_scan(&info->mtd, 1)) { + err = -ENXIO; + goto out_iounmap; + } + + err = mtd_device_parse_register(&info->mtd, NULL, NULL, + pdata ? pdata->parts : NULL, + pdata ? pdata->nr_parts : 0); + + platform_set_drvdata(pdev, 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 platform_device *pdev) +{ + struct onenand_info *info = platform_get_drvdata(pdev); + struct resource *res = pdev->resource; + unsigned long size = resource_size(res); + + platform_set_drvdata(pdev, NULL); + + if (info) { + onenand_release(&info->mtd); + release_mem_region(res->start, size); + iounmap(info->onenand.base); + kfree(info); + } + + return 0; +} + +static struct platform_driver generic_onenand_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = generic_onenand_probe, + .remove = __devexit_p(generic_onenand_remove), +}; + +module_platform_driver(generic_onenand_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); +MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards"); +MODULE_ALIAS("platform:" DRIVER_NAME); |