+++ /dev/null
-/*======================================================================
-
- drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver
-
- Copyright (C) 2000 ARM Limited
- Copyright (C) 2003 Deep Blue Solutions Ltd.
-
- 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 program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- This is access code for flashes using ARM's flash partitioning
- standards.
-
-======================================================================*/
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/io.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/concat.h>
-
-#include <asm/mach/flash.h>
-#include <mach/hardware.h>
-#include <asm/system.h>
-
-struct armflash_subdev_info {
- char *name;
- struct mtd_info *mtd;
- struct map_info map;
- struct flash_platform_data *plat;
-};
-
-struct armflash_info {
- struct resource *res;
- struct mtd_partition *parts;
- struct mtd_info *mtd;
- int nr_subdev;
- struct armflash_subdev_info subdev[0];
-};
-
-static void armflash_set_vpp(struct map_info *map, int on)
-{
- struct armflash_subdev_info *info =
- container_of(map, struct armflash_subdev_info, map);
-
- if (info->plat && info->plat->set_vpp)
- info->plat->set_vpp(on);
-}
-
-static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };
-
-static int armflash_subdev_probe(struct armflash_subdev_info *subdev,
- struct resource *res)
-{
- struct flash_platform_data *plat = subdev->plat;
- resource_size_t size = res->end - res->start + 1;
- void __iomem *base;
- int err = 0;
-
- if (!request_mem_region(res->start, size, subdev->name)) {
- err = -EBUSY;
- goto out;
- }
-
- base = ioremap(res->start, size);
- if (!base) {
- err = -ENOMEM;
- goto no_mem;
- }
-
- /*
- * look for CFI based flash parts fitted to this board
- */
- subdev->map.size = size;
- subdev->map.bankwidth = plat->width;
- subdev->map.phys = res->start;
- subdev->map.virt = base;
- subdev->map.name = subdev->name;
- subdev->map.set_vpp = armflash_set_vpp;
-
- simple_map_init(&subdev->map);
-
- /*
- * Also, the CFI layer automatically works out what size
- * of chips we have, and does the necessary identification
- * for us automatically.
- */
- subdev->mtd = do_map_probe(plat->map_name, &subdev->map);
- if (!subdev->mtd) {
- err = -ENXIO;
- goto no_device;
- }
-
- subdev->mtd->owner = THIS_MODULE;
-
- /* Successful? */
- if (err == 0)
- return err;
-
- if (subdev->mtd)
- map_destroy(subdev->mtd);
- no_device:
- iounmap(base);
- no_mem:
- release_mem_region(res->start, size);
- out:
- return err;
-}
-
-static void armflash_subdev_remove(struct armflash_subdev_info *subdev)
-{
- if (subdev->mtd)
- map_destroy(subdev->mtd);
- if (subdev->map.virt)
- iounmap(subdev->map.virt);
- kfree(subdev->name);
- subdev->name = NULL;
- release_mem_region(subdev->map.phys, subdev->map.size);
-}
-
-static int armflash_probe(struct platform_device *dev)
-{
- struct flash_platform_data *plat = dev->dev.platform_data;
- unsigned int size;
- struct armflash_info *info;
- int i, nr, err;
-
- /* Count the number of devices */
- for (nr = 0; ; nr++)
- if (!platform_get_resource(dev, IORESOURCE_MEM, nr))
- break;
- if (nr == 0) {
- err = -ENODEV;
- goto out;
- }
-
- size = sizeof(struct armflash_info) +
- sizeof(struct armflash_subdev_info) * nr;
- info = kzalloc(size, GFP_KERNEL);
- if (!info) {
- err = -ENOMEM;
- goto out;
- }
-
- if (plat && plat->init) {
- err = plat->init();
- if (err)
- goto no_resource;
- }
-
- for (i = 0; i < nr; i++) {
- struct armflash_subdev_info *subdev = &info->subdev[i];
- struct resource *res;
-
- res = platform_get_resource(dev, IORESOURCE_MEM, i);
- if (!res)
- break;
-
- if (nr == 1)
- /* No MTD concatenation, just use the default name */
- subdev->name = kstrdup(dev_name(&dev->dev), GFP_KERNEL);
- else
- subdev->name = kasprintf(GFP_KERNEL, "%s-%d",
- dev_name(&dev->dev), i);
- if (!subdev->name) {
- err = -ENOMEM;
- break;
- }
- subdev->plat = plat;
-
- err = armflash_subdev_probe(subdev, res);
- if (err) {
- kfree(subdev->name);
- subdev->name = NULL;
- break;
- }
- }
- info->nr_subdev = i;
-
- if (err)
- goto subdev_err;
-
- if (info->nr_subdev == 1)
- info->mtd = info->subdev[0].mtd;
- else if (info->nr_subdev > 1) {
- struct mtd_info *cdev[info->nr_subdev];
-
- /*
- * We detected multiple devices. Concatenate them together.
- */
- for (i = 0; i < info->nr_subdev; i++)
- cdev[i] = info->subdev[i].mtd;
-
- info->mtd = mtd_concat_create(cdev, info->nr_subdev,
- dev_name(&dev->dev));
- if (info->mtd == NULL)
- err = -ENXIO;
- }
-
- if (err < 0)
- goto cleanup;
-
- err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);
- if (err > 0) {
- err = add_mtd_partitions(info->mtd, info->parts, err);
- if (err)
- printk(KERN_ERR
- "mtd partition registration failed: %d\n", err);
- }
-
- if (err == 0) {
- platform_set_drvdata(dev, info);
- return err;
- }
-
- /*
- * We got an error, free all resources.
- */
- cleanup:
- if (info->mtd) {
- del_mtd_partitions(info->mtd);
- if (info->mtd != info->subdev[0].mtd)
- mtd_concat_destroy(info->mtd);
- }
- kfree(info->parts);
- subdev_err:
- for (i = info->nr_subdev - 1; i >= 0; i--)
- armflash_subdev_remove(&info->subdev[i]);
- no_resource:
- if (plat && plat->exit)
- plat->exit();
- kfree(info);
- out:
- return err;
-}
-
-static int armflash_remove(struct platform_device *dev)
-{
- struct armflash_info *info = platform_get_drvdata(dev);
- struct flash_platform_data *plat = dev->dev.platform_data;
- int i;
-
- platform_set_drvdata(dev, NULL);
-
- if (info) {
- if (info->mtd) {
- del_mtd_partitions(info->mtd);
- if (info->mtd != info->subdev[0].mtd)
- mtd_concat_destroy(info->mtd);
- }
- kfree(info->parts);
-
- for (i = info->nr_subdev - 1; i >= 0; i--)
- armflash_subdev_remove(&info->subdev[i]);
-
- if (plat && plat->exit)
- plat->exit();
-
- kfree(info);
- }
-
- return 0;
-}
-
-static struct platform_driver armflash_driver = {
- .probe = armflash_probe,
- .remove = armflash_remove,
- .driver = {
- .name = "armflash",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init armflash_init(void)
-{
- return platform_driver_register(&armflash_driver);
-}
-
-static void __exit armflash_exit(void)
-{
- platform_driver_unregister(&armflash_driver);
-}
-
-module_init(armflash_init);
-module_exit(armflash_exit);
-
-MODULE_AUTHOR("ARM Ltd");
-MODULE_DESCRIPTION("ARM Integrator CFI map driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:armflash");
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff