| /* |
| * 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/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"); |
| |