diff options
Diffstat (limited to 'drivers/mtd/maps/pxa2xx-flash.c')
| -rw-r--r-- | drivers/mtd/maps/pxa2xx-flash.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c new file mode 100644 index 00000000000..cb933ac475d --- /dev/null +++ b/drivers/mtd/maps/pxa2xx-flash.c @@ -0,0 +1,200 @@ +/* + * 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/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> +#include <asm/hardware.h> + +#include <asm/mach/flash.h> + +static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, + ssize_t len) +{ + consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE); +} + +struct pxa2xx_flash_info { + struct mtd_partition *parts; + int nr_parts; + struct mtd_info *mtd; + struct map_info map; +}; + + +static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; + + +static int __init pxa2xx_flash_probe(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct flash_platform_data *flash = pdev->dev.platform_data; + struct pxa2xx_flash_info *info; + struct mtd_partition *parts; + struct resource *res; + int ret = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + memset(info, 0, sizeof(struct pxa2xx_flash_info)); + info->map.name = (char *) flash->name; + info->map.bankwidth = flash->width; + info->map.phys = res->start; + info->map.size = res->end - res->start + 1; + info->parts = flash->parts; + info->nr_parts = flash->nr_parts; + + 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->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + ret = parse_mtd_partitions(info->mtd, probes, &parts, 0); + + if (ret > 0) { + info->nr_parts = ret; + info->parts = parts; + } +#endif + + if (info->nr_parts) { + add_mtd_partitions(info->mtd, info->parts, + info->nr_parts); + } else { + printk("Registering %s as whole device\n", + info->map.name); + add_mtd_device(info->mtd); + } + + dev_set_drvdata(dev, info); + return 0; +} + +static int __exit pxa2xx_flash_remove(struct device *dev) +{ + struct pxa2xx_flash_info *info = dev_get_drvdata(dev); + + dev_set_drvdata(dev, NULL); + +#ifdef CONFIG_MTD_PARTITIONS + if (info->nr_parts) + del_mtd_partitions(info->mtd); + else +#endif + del_mtd_device(info->mtd); + + map_destroy(info->mtd); + iounmap(info->map.virt); + if (info->map.cached) + iounmap(info->map.cached); + kfree(info->parts); + kfree(info); + return 0; +} + +#ifdef CONFIG_PM +static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state) +{ + struct pxa2xx_flash_info *info = dev_get_drvdata(dev); + int ret = 0; + + if (info->mtd && info->mtd->suspend) + ret = info->mtd->suspend(info->mtd); + return ret; +} + +static int pxa2xx_flash_resume(struct device *dev) +{ + struct pxa2xx_flash_info *info = dev_get_drvdata(dev); + + if (info->mtd && info->mtd->resume) + info->mtd->resume(info->mtd); + return 0; +} +static void pxa2xx_flash_shutdown(struct device *dev) +{ + struct pxa2xx_flash_info *info = dev_get_drvdata(dev); + + if (info && info->mtd->suspend(info->mtd) == 0) + info->mtd->resume(info->mtd); +} +#else +#define pxa2xx_flash_suspend NULL +#define pxa2xx_flash_resume NULL +#define pxa2xx_flash_shutdown NULL +#endif + +static struct device_driver pxa2xx_flash_driver = { + .name = "pxa2xx-flash", + .bus = &platform_bus_type, + .probe = pxa2xx_flash_probe, + .remove = __exit_p(pxa2xx_flash_remove), + .suspend = pxa2xx_flash_suspend, + .resume = pxa2xx_flash_resume, + .shutdown = pxa2xx_flash_shutdown, +}; + +static int __init init_pxa2xx_flash(void) +{ + return driver_register(&pxa2xx_flash_driver); +} + +static void __exit cleanup_pxa2xx_flash(void) +{ + driver_unregister(&pxa2xx_flash_driver); +} + +module_init(init_pxa2xx_flash); +module_exit(cleanup_pxa2xx_flash); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); +MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |