-/*
- * 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/platform_device.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/slab.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>
-#include <plat/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;
- u32 l;
-
- if (cpu_class_is_omap1()) {
- if (enable) {
- if (count++ == 0) {
- l = omap_readl(EMIFS_CONFIG);
- l |= OMAP_EMIFS_CONFIG_WP;
- omap_writel(l, EMIFS_CONFIG);
- }
- } else {
- if (count && (--count == 0)) {
- l = omap_readl(EMIFS_CONFIG);
- l &= ~OMAP_EMIFS_CONFIG_WP;
- omap_writel(l, EMIFS_CONFIG);
- }
- }
- }
-}
-
-static int __init omapflash_probe(struct platform_device *pdev)
-{
- int err;
- struct omapflash_info *info;
- struct flash_platform_data *pdata = pdev->dev.platform_data;
- struct resource *res = pdev->resource;
- unsigned long size = res->end - res->start + 1;
-
- info = kzalloc(sizeof(struct omapflash_info), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- 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 = dev_name(&pdev->dev);
- 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;
-
- info->mtd->dev.parent = &pdev->dev;
-
-#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);
-
- platform_set_drvdata(pdev, 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 __exit omapflash_remove(struct platform_device *pdev)
-{
- struct omapflash_info *info = platform_get_drvdata(pdev);
-
- platform_set_drvdata(pdev, 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 platform_driver omapflash_driver = {
- .remove = __exit_p(omapflash_remove),
- .driver = {
- .name = "omapflash",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init omapflash_init(void)
-{
- return platform_driver_probe(&omapflash_driver, omapflash_probe);
-}
-
-static void __exit omapflash_exit(void)
-{
- platform_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");
-MODULE_ALIAS("platform:omapflash");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff