diff options
Diffstat (limited to 'drivers/mtd/maps/omap_nor.c')
| -rw-r--r-- | drivers/mtd/maps/omap_nor.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/mtd/maps/omap_nor.c b/drivers/mtd/maps/omap_nor.c new file mode 100644 index 00000000000..8cc71409a32 --- /dev/null +++ b/drivers/mtd/maps/omap_nor.c @@ -0,0 +1,179 @@ +/* + * Flash memory support for various TI OMAP boards + * + * Copyright (C) 2001-2002 MontaVista Software Inc. + * Copyright (C) 2003-2004 Texas Instruments + * Copyright (C) 2004 Nokia Corporation + * + * Assembled using driver code copyright the companies above + * and written by David Brownell, Jian Zhang <jzhang@ti.com>, + * Tony Lindgren <tony@atomide.com> and others. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/ioport.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-types.h> +#include <asm/mach/flash.h> +#include <asm/arch/tc.h> + +#ifdef CONFIG_MTD_PARTITIONS +static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL }; +#endif + +struct omapflash_info { + struct mtd_partition *parts; + struct mtd_info *mtd; + struct map_info map; +}; + +static void omap_set_vpp(struct map_info *map, int enable) +{ + static int count; + + if (enable) { + if (count++ == 0) + OMAP_EMIFS_CONFIG_REG |= OMAP_EMIFS_CONFIG_WP; + } else { + if (count && (--count == 0)) + OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP; + } +} + +static int __devinit omapflash_probe(struct device *dev) +{ + int err; + struct omapflash_info *info; + struct platform_device *pdev = to_platform_device(dev); + struct flash_platform_data *pdata = pdev->dev.platform_data; + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; + + info = kmalloc(sizeof(struct omapflash_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + memset(info, 0, sizeof(struct omapflash_info)); + + 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 = pdev->dev.bus_id; + info->map.phys = res->start; + info->map.size = size; + info->map.bankwidth = pdata->width; + info->map.set_vpp = omap_set_vpp; + + simple_map_init(&info->map); + info->mtd = do_map_probe(pdata->map_name, &info->map); + if (!info->mtd) { + err = -EIO; + goto out_iounmap; + } + info->mtd->owner = THIS_MODULE; + +#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 + add_mtd_device(info->mtd); + + dev_set_drvdata(&pdev->dev, 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 omapflash_remove(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct omapflash_info *info = dev_get_drvdata(&pdev->dev); + + dev_set_drvdata(&pdev->dev, NULL); + + if (info) { + if (info->parts) { + del_mtd_partitions(info->mtd); + kfree(info->parts); + } 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 device_driver omapflash_driver = { + .name = "omapflash", + .bus = &platform_bus_type, + .probe = omapflash_probe, + .remove = __devexit_p(omapflash_remove), +}; + +static int __init omapflash_init(void) +{ + return driver_register(&omapflash_driver); +} + +static void __exit omapflash_exit(void) +{ + driver_unregister(&omapflash_driver); +} + +module_init(omapflash_init); +module_exit(omapflash_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards"); + |