+++ /dev/null
-/*
- * Parallel flash driver for the Atheros AR91xx SoC
- *
- * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
- *
- * 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/slab.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/io.h>
-
-#include <asm/mach-ar71xx/ar71xx.h>
-#include <asm/mach-ar71xx/ar91xx_flash.h>
-
-#define DRV_NAME "ar91xx-flash"
-
-struct ar91xx_flash_info {
- struct mtd_info *mtd;
- struct map_info map;
-#ifdef CONFIG_MTD_PARTITIONS
- int nr_parts;
- struct mtd_partition *parts;
-#endif
-};
-
-static map_word ar91xx_flash_read(struct map_info *map, unsigned long ofs)
-{
- map_word val;
-
- if (map_bankwidth_is_1(map))
- val.x[0] = __raw_readb(map->virt + (ofs ^ 3));
- else if (map_bankwidth_is_2(map))
- val.x[0] = __raw_readw(map->virt + (ofs ^ 2));
- else
- val = map_word_ff(map);
-
- return val;
-}
-
-static void ar91xx_flash_write(struct map_info *map, map_word d,
- unsigned long ofs)
-{
- if (map_bankwidth_is_1(map))
- __raw_writeb(d.x[0], map->virt + (ofs ^ 3));
- else if (map_bankwidth_is_2(map))
- __raw_writew(d.x[0], map->virt + (ofs ^ 2));
-
- mb();
-}
-
-static map_word ar91xx_flash_read_lock(struct map_info *map, unsigned long ofs)
-{
- map_word ret;
-
- ar71xx_flash_acquire();
- ret = ar91xx_flash_read(map, ofs);
- ar71xx_flash_release();
-
- return ret;
-}
-
-static void ar91xx_flash_write_lock(struct map_info *map, map_word d,
- unsigned long ofs)
-{
- ar71xx_flash_acquire();
- ar91xx_flash_write(map, d, ofs);
- ar71xx_flash_release();
-}
-
-static void ar91xx_flash_copy_from_lock(struct map_info *map, void *to,
- unsigned long from, ssize_t len)
-{
- ar71xx_flash_acquire();
- inline_map_copy_from(map, to, from, len);
- ar71xx_flash_release();
-}
-
-static void ar91xx_flash_copy_to_lock(struct map_info *map, unsigned long to,
- const void *from, ssize_t len)
-{
- ar71xx_flash_acquire();
- inline_map_copy_to(map, to, from, len);
- ar71xx_flash_release();
-}
-
-static int ar91xx_flash_remove(struct platform_device *pdev)
-{
- struct ar91xx_flash_platform_data *pdata;
- struct ar91xx_flash_info *info;
-
- info = platform_get_drvdata(pdev);
- if (info == NULL)
- return 0;
-
- platform_set_drvdata(pdev, NULL);
-
- if (info->mtd == NULL)
- return 0;
-
- pdata = pdev->dev.platform_data;
-#ifdef CONFIG_MTD_PARTITIONS
- if (info->nr_parts) {
- del_mtd_partitions(info->mtd);
- kfree(info->parts);
- } else if (pdata->nr_parts) {
- del_mtd_partitions(info->mtd);
- } else {
- del_mtd_device(info->mtd);
- }
-#else
- del_mtd_device(info->mtd);
-#endif
- map_destroy(info->mtd);
-
- return 0;
-}
-
-static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
-#ifdef CONFIG_MTD_PARTITIONS
-static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
-#endif
-
-static int ar91xx_flash_probe(struct platform_device *pdev)
-{
- struct ar91xx_flash_platform_data *pdata;
- struct ar91xx_flash_info *info;
- struct resource *res;
- struct resource *region;
- const char **probe_type;
- int err = 0;
-
- pdata = pdev->dev.platform_data;
- if (pdata == NULL)
- return -EINVAL;
-
- info = devm_kzalloc(&pdev->dev, sizeof(struct ar91xx_flash_info),
- GFP_KERNEL);
- if (info == NULL) {
- err = -ENOMEM;
- goto err_out;
- }
-
- platform_set_drvdata(pdev, info);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- err = -ENOENT;
- goto err_out;
- }
-
- dev_info(&pdev->dev, "%.8llx at %.8llx\n",
- (unsigned long long)(res->end - res->start + 1),
- (unsigned long long)res->start);
-
- region = devm_request_mem_region(&pdev->dev,
- res->start, res->end - res->start + 1,
- dev_name(&pdev->dev));
- if (region == NULL) {
- dev_err(&pdev->dev, "could not reserve memory region\n");
- err = -ENOMEM;
- goto err_out;
- }
-
- info->map.name = dev_name(&pdev->dev);
- info->map.phys = res->start;
- info->map.size = res->end - res->start + 1;
- info->map.bankwidth = pdata->width;
-
- info->map.virt = devm_ioremap(&pdev->dev, info->map.phys,
- info->map.size);
- if (info->map.virt == NULL) {
- dev_err(&pdev->dev, "failed to ioremap flash region\n");
- err = -EIO;
- goto err_out;
- }
-
- simple_map_init(&info->map);
- if (pdata->is_shared) {
- info->map.read = ar91xx_flash_read_lock;
- info->map.write = ar91xx_flash_write_lock;
- info->map.copy_from = ar91xx_flash_copy_from_lock;
- info->map.copy_to = ar91xx_flash_copy_to_lock;
- } else {
- info->map.read = ar91xx_flash_read;
- info->map.write = ar91xx_flash_write;
- }
-
- probe_type = rom_probe_types;
- for (; info->mtd == NULL && *probe_type != NULL; probe_type++)
- info->mtd = do_map_probe(*probe_type, &info->map);
-
- if (info->mtd == NULL) {
- dev_err(&pdev->dev, "map_probe failed\n");
- err = -ENXIO;
- goto err_out;
- }
-
- info->mtd->owner = THIS_MODULE;
-
-#ifdef CONFIG_MTD_PARTITIONS
- if (pdata->nr_parts) {
- dev_info(&pdev->dev, "using static partition mapping\n");
- add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
- return 0;
- }
-
- err = parse_mtd_partitions(info->mtd, part_probe_types,
- &info->parts, 0);
- if (err > 0) {
- add_mtd_partitions(info->mtd, info->parts, err);
- return 0;
- }
-#endif
-
- add_mtd_device(info->mtd);
- return 0;
-
-err_out:
- ar91xx_flash_remove(pdev);
- return err;
-}
-
-#ifdef CONFIG_PM
-static int ar91xx_flash_suspend(struct platform_device *dev, pm_message_t state)
-{
- struct ar91xx_flash_info *info = platform_get_drvdata(dev);
- int ret = 0;
-
- if (info->mtd->suspend)
- ret = info->mtd->suspend(info->mtd);
-
- if (ret)
- goto fail;
-
- return 0;
-
-fail:
- if (info->mtd->suspend) {
- BUG_ON(!info->mtd->resume);
- info->mtd->resume(info->mtd);
- }
-
- return ret;
-}
-
-static int ar91xx_flash_resume(struct platform_device *pdev)
-{
- struct ar91xx_flash_info *info = platform_get_drvdata(pdev);
-
- if (info->mtd->resume)
- info->mtd->resume(info->mtd);
-
- return 0;
-}
-
-static void ar91xx_flash_shutdown(struct platform_device *pdev)
-{
- struct ar91xx_flash_info *info = platform_get_drvdata(pdev);
-
- if (info->mtd->suspend && info->mtd->resume)
- if (info->mtd->suspend(info->mtd) == 0)
- info->mtd->resume(info->mtd);
-}
-#else
-#define ar91xx_flash_suspend NULL
-#define ar91xx_flash_resume NULL
-#define ar91xx_flash_shutdown NULL
-#endif
-
-static struct platform_driver ar91xx_flash_driver = {
- .probe = ar91xx_flash_probe,
- .remove = ar91xx_flash_remove,
- .suspend = ar91xx_flash_suspend,
- .resume = ar91xx_flash_resume,
- .shutdown = ar91xx_flash_shutdown,
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init ar91xx_flash_init(void)
-{
- return platform_driver_register(&ar91xx_flash_driver);
-}
-
-static void __exit ar91xx_flash_exit(void)
-{
- platform_driver_unregister(&ar91xx_flash_driver);
-}
-
-module_init(ar91xx_flash_init);
-module_exit(ar91xx_flash_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_DESCRIPTION("Parallel flash driver for the Atheros AR91xx SoC");
-MODULE_ALIAS("platform:" DRV_NAME);
projects / openwrt.git / blobdiff