diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/mtd/maps/pxa2xx-flash.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c new file mode 100644 index 000000000..2cde28ed9 --- /dev/null +++ b/drivers/mtd/maps/pxa2xx-flash.c @@ -0,0 +1,144 @@ +/* + * Map driver for Intel XScale PXA2xx platforms. + * + * Author: Nicolas Pitre + * Copyright: (C) 2001 MontaVista Software Inc. + * + * 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. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> +#include <mach/hardware.h> + +#include <asm/mach/flash.h> + +#define CACHELINESIZE 32 + +static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, + ssize_t len) +{ + unsigned long start = (unsigned long)map->cached + from; + unsigned long end = start + len; + + start &= ~(CACHELINESIZE - 1); + while (start < end) { + /* invalidate D cache line */ + asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)); + start += CACHELINESIZE; + } +} + +struct pxa2xx_flash_info { + struct mtd_info *mtd; + struct map_info map; +}; + +static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; + +static int pxa2xx_flash_probe(struct platform_device *pdev) +{ + struct flash_platform_data *flash = dev_get_platdata(&pdev->dev); + struct pxa2xx_flash_info *info; + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->map.name = flash->name; + info->map.bankwidth = flash->width; + info->map.phys = res->start; + info->map.size = resource_size(res); + + info->map.virt = ioremap(info->map.phys, info->map.size); + if (!info->map.virt) { + printk(KERN_WARNING "Failed to ioremap %s\n", + info->map.name); + return -ENOMEM; + } + info->map.cached = + ioremap_cached(info->map.phys, info->map.size); + if (!info->map.cached) + printk(KERN_WARNING "Failed to ioremap cached %s\n", + info->map.name); + info->map.inval_cache = pxa2xx_map_inval_cache; + simple_map_init(&info->map); + + printk(KERN_NOTICE + "Probing %s at physical address 0x%08lx" + " (%d-bit bankwidth)\n", + info->map.name, (unsigned long)info->map.phys, + info->map.bankwidth * 8); + + info->mtd = do_map_probe(flash->map_name, &info->map); + + if (!info->mtd) { + iounmap((void *)info->map.virt); + if (info->map.cached) + iounmap(info->map.cached); + return -EIO; + } + info->mtd->dev.parent = &pdev->dev; + + mtd_device_parse_register(info->mtd, probes, NULL, flash->parts, + flash->nr_parts); + + platform_set_drvdata(pdev, info); + return 0; +} + +static int pxa2xx_flash_remove(struct platform_device *dev) +{ + struct pxa2xx_flash_info *info = platform_get_drvdata(dev); + + mtd_device_unregister(info->mtd); + + map_destroy(info->mtd); + iounmap(info->map.virt); + if (info->map.cached) + iounmap(info->map.cached); + kfree(info); + return 0; +} + +#ifdef CONFIG_PM +static void pxa2xx_flash_shutdown(struct platform_device *dev) +{ + struct pxa2xx_flash_info *info = platform_get_drvdata(dev); + + if (info && mtd_suspend(info->mtd) == 0) + mtd_resume(info->mtd); +} +#else +#define pxa2xx_flash_shutdown NULL +#endif + +static struct platform_driver pxa2xx_flash_driver = { + .driver = { + .name = "pxa2xx-flash", + }, + .probe = pxa2xx_flash_probe, + .remove = pxa2xx_flash_remove, + .shutdown = pxa2xx_flash_shutdown, +}; + +module_platform_driver(pxa2xx_flash_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); +MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |