df66e7167a
This patch extends the physmap mapping driver to support multiple
resources for non-identical NOR chips that will be concatenated together
when selected.
This is needed for example for Intel 48F4400 512MBit chips, since they
consist of 2 single different NOR chips with different geometries. The
first (lower) one has botton boot sectors and the 2nd (upper) has top
boot sectors. This currently isn't handled correctly by calling the
physmap driver once with only one resource covering both chips in one
memory region. The same geometrie is used for both chips.
With this patch the following resource structure can be used to
describe the 48F4400 chip correctly:
static struct resource board_nor_resource[] = {
[0] = {
.start = 0xf8000000,
.end = 0xfbffffff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 0xfc000000,
.end = 0xffffffff,
.flags = IORESOURCE_MEM,
}
};
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
321 lines
7.5 KiB
C
321 lines
7.5 KiB
C
/*
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* $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $
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*
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* Normal mappings of chips in physical memory
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*
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* Copyright (C) 2003 MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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*
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* 031022 - [jsun] add run-time configure and partition setup
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/mtd/concat.h>
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#include <asm/io.h>
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#define MAX_RESOURCES 4
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struct physmap_flash_info {
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struct mtd_info *mtd[MAX_RESOURCES];
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struct mtd_info *cmtd;
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struct map_info map[MAX_RESOURCES];
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struct resource *res;
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#ifdef CONFIG_MTD_PARTITIONS
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int nr_parts;
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struct mtd_partition *parts;
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#endif
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};
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static int physmap_flash_remove(struct platform_device *dev)
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{
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struct physmap_flash_info *info;
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struct physmap_flash_data *physmap_data;
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int i;
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info = platform_get_drvdata(dev);
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if (info == NULL)
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return 0;
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platform_set_drvdata(dev, NULL);
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physmap_data = dev->dev.platform_data;
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#ifdef CONFIG_MTD_CONCAT
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if (info->cmtd != info->mtd[0]) {
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del_mtd_device(info->cmtd);
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mtd_concat_destroy(info->cmtd);
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}
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#endif
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for (i = 0; i < MAX_RESOURCES; i++) {
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if (info->mtd[i] != NULL) {
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#ifdef CONFIG_MTD_PARTITIONS
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if (info->nr_parts) {
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del_mtd_partitions(info->mtd[i]);
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kfree(info->parts);
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} else if (physmap_data->nr_parts) {
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del_mtd_partitions(info->mtd[i]);
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} else {
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del_mtd_device(info->mtd[i]);
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}
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#else
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del_mtd_device(info->mtd[i]);
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#endif
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map_destroy(info->mtd[i]);
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}
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if (info->map[i].virt != NULL)
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iounmap(info->map[i].virt);
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}
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if (info->res != NULL) {
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release_resource(info->res);
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kfree(info->res);
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}
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return 0;
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}
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static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
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#ifdef CONFIG_MTD_PARTITIONS
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static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
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#endif
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static int physmap_flash_probe(struct platform_device *dev)
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{
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struct physmap_flash_data *physmap_data;
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struct physmap_flash_info *info;
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const char **probe_type;
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int err = 0;
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int i;
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int devices_found = 0;
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physmap_data = dev->dev.platform_data;
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if (physmap_data == NULL)
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return -ENODEV;
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info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
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if (info == NULL) {
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err = -ENOMEM;
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goto err_out;
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}
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platform_set_drvdata(dev, info);
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for (i = 0; i < dev->num_resources; i++) {
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printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
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(unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
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(unsigned long long)dev->resource[i].start);
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info->res = request_mem_region(dev->resource[i].start,
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dev->resource[i].end - dev->resource[i].start + 1,
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dev->dev.bus_id);
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if (info->res == NULL) {
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dev_err(&dev->dev, "Could not reserve memory region\n");
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err = -ENOMEM;
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goto err_out;
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}
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info->map[i].name = dev->dev.bus_id;
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info->map[i].phys = dev->resource[i].start;
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info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
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info->map[i].bankwidth = physmap_data->width;
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info->map[i].set_vpp = physmap_data->set_vpp;
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info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size);
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if (info->map[i].virt == NULL) {
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dev_err(&dev->dev, "Failed to ioremap flash region\n");
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err = EIO;
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goto err_out;
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}
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simple_map_init(&info->map[i]);
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probe_type = rom_probe_types;
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for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
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info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
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if (info->mtd[i] == NULL) {
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dev_err(&dev->dev, "map_probe failed\n");
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err = -ENXIO;
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goto err_out;
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} else {
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devices_found++;
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}
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info->mtd[i]->owner = THIS_MODULE;
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}
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if (devices_found == 1) {
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info->cmtd = info->mtd[0];
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} else if (devices_found > 1) {
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/*
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* We detected multiple devices. Concatenate them together.
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*/
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#ifdef CONFIG_MTD_CONCAT
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info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id);
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if (info->cmtd == NULL)
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err = -ENXIO;
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#else
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printk(KERN_ERR "physmap-flash: multiple devices "
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"found but MTD concat support disabled.\n");
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err = -ENXIO;
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#endif
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}
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if (err)
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goto err_out;
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#ifdef CONFIG_MTD_PARTITIONS
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err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0);
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if (err > 0) {
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add_mtd_partitions(info->cmtd, info->parts, err);
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return 0;
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}
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if (physmap_data->nr_parts) {
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printk(KERN_NOTICE "Using physmap partition information\n");
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add_mtd_partitions(info->cmtd, physmap_data->parts,
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physmap_data->nr_parts);
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return 0;
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}
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#endif
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add_mtd_device(info->cmtd);
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return 0;
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err_out:
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physmap_flash_remove(dev);
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return err;
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}
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#ifdef CONFIG_PM
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static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct physmap_flash_info *info = platform_get_drvdata(dev);
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int ret = 0;
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int i;
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if (info)
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for (i = 0; i < MAX_RESOURCES; i++)
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ret |= info->mtd[i].suspend(info->mtd[i]);
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return ret;
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}
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static int physmap_flash_resume(struct platform_device *dev)
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{
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struct physmap_flash_info *info = platform_get_drvdata(dev);
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int i;
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if (info)
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for (i = 0; i < MAX_RESOURCES; i++)
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info->mtd[i].resume(info->mtd[i]);
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return 0;
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}
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static void physmap_flash_shutdown(struct platform_device *dev)
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{
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struct physmap_flash_info *info = platform_get_drvdata(dev);
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int i;
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for (i = 0; i < MAX_RESOURCES; i++)
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if (info && info->mtd[i].suspend(info->mtd[i]) == 0)
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info->mtd[i].resume(info->mtd[i]);
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}
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#endif
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static struct platform_driver physmap_flash_driver = {
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.probe = physmap_flash_probe,
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.remove = physmap_flash_remove,
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#ifdef CONFIG_PM
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.suspend = physmap_flash_suspend,
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.resume = physmap_flash_resume,
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.shutdown = physmap_flash_shutdown,
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#endif
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.driver = {
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.name = "physmap-flash",
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},
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};
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#ifdef CONFIG_MTD_PHYSMAP_LEN
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#if CONFIG_MTD_PHYSMAP_LEN != 0
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#warning using PHYSMAP compat code
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#define PHYSMAP_COMPAT
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#endif
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#endif
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#ifdef PHYSMAP_COMPAT
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static struct physmap_flash_data physmap_flash_data = {
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.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
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};
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static struct resource physmap_flash_resource = {
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.start = CONFIG_MTD_PHYSMAP_START,
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.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device physmap_flash = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &physmap_flash_data,
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},
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.num_resources = 1,
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.resource = &physmap_flash_resource,
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};
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void physmap_configure(unsigned long addr, unsigned long size,
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int bankwidth, void (*set_vpp)(struct map_info *, int))
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{
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physmap_flash_resource.start = addr;
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physmap_flash_resource.end = addr + size - 1;
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physmap_flash_data.width = bankwidth;
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physmap_flash_data.set_vpp = set_vpp;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
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{
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physmap_flash_data.nr_parts = num_parts;
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physmap_flash_data.parts = parts;
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}
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#endif
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#endif
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static int __init physmap_init(void)
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{
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int err;
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err = platform_driver_register(&physmap_flash_driver);
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#ifdef PHYSMAP_COMPAT
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if (err == 0)
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platform_device_register(&physmap_flash);
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#endif
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return err;
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}
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static void __exit physmap_exit(void)
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{
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#ifdef PHYSMAP_COMPAT
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platform_device_unregister(&physmap_flash);
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#endif
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platform_driver_unregister(&physmap_flash_driver);
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}
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module_init(physmap_init);
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module_exit(physmap_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_DESCRIPTION("Generic configurable MTD map driver");
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