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path: root/drivers/mtd/maps/physmap.c
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Diffstat (limited to 'drivers/mtd/maps/physmap.c')
-rw-r--r--drivers/mtd/maps/physmap.c168
1 files changed, 108 insertions, 60 deletions
diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index 28c5ffd7523..f00e04efbe2 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -20,11 +20,15 @@
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
+#include <linux/mtd/concat.h>
#include <asm/io.h>
+#define MAX_RESOURCES 4
+
struct physmap_flash_info {
- struct mtd_info *mtd;
- struct map_info map;
+ struct mtd_info *mtd[MAX_RESOURCES];
+ struct mtd_info *cmtd;
+ struct map_info map[MAX_RESOURCES];
struct resource *res;
#ifdef CONFIG_MTD_PARTITIONS
int nr_parts;
@@ -32,11 +36,11 @@ struct physmap_flash_info {
#endif
};
-
static int physmap_flash_remove(struct platform_device *dev)
{
struct physmap_flash_info *info;
struct physmap_flash_data *physmap_data;
+ int i;
info = platform_get_drvdata(dev);
if (info == NULL)
@@ -45,24 +49,33 @@ static int physmap_flash_remove(struct platform_device *dev)
physmap_data = dev->dev.platform_data;
- if (info->mtd != NULL) {
+#ifdef CONFIG_MTD_CONCAT
+ if (info->cmtd != info->mtd[0]) {
+ del_mtd_device(info->cmtd);
+ mtd_concat_destroy(info->cmtd);
+ }
+#endif
+
+ for (i = 0; i < MAX_RESOURCES; i++) {
+ if (info->mtd[i] != NULL) {
#ifdef CONFIG_MTD_PARTITIONS
- if (info->nr_parts) {
- del_mtd_partitions(info->mtd);
- kfree(info->parts);
- } else if (physmap_data->nr_parts) {
- del_mtd_partitions(info->mtd);
- } else {
- del_mtd_device(info->mtd);
- }
+ if (info->nr_parts) {
+ del_mtd_partitions(info->mtd[i]);
+ kfree(info->parts);
+ } else if (physmap_data->nr_parts) {
+ del_mtd_partitions(info->mtd[i]);
+ } else {
+ del_mtd_device(info->mtd[i]);
+ }
#else
- del_mtd_device(info->mtd);
+ del_mtd_device(info->mtd[i]);
#endif
- map_destroy(info->mtd);
- }
+ map_destroy(info->mtd[i]);
+ }
- if (info->map.virt != NULL)
- iounmap(info->map.virt);
+ if (info->map[i].virt != NULL)
+ iounmap(info->map[i].virt);
+ }
if (info->res != NULL) {
release_resource(info->res);
@@ -82,16 +95,14 @@ static int physmap_flash_probe(struct platform_device *dev)
struct physmap_flash_data *physmap_data;
struct physmap_flash_info *info;
const char **probe_type;
- int err;
+ int err = 0;
+ int i;
+ int devices_found = 0;
physmap_data = dev->dev.platform_data;
if (physmap_data == NULL)
return -ENODEV;
- printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
- (unsigned long long)(dev->resource->end - dev->resource->start + 1),
- (unsigned long long)dev->resource->start);
-
info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
if (info == NULL) {
err = -ENOMEM;
@@ -100,56 +111,83 @@ static int physmap_flash_probe(struct platform_device *dev)
platform_set_drvdata(dev, info);
- info->res = request_mem_region(dev->resource->start,
- dev->resource->end - dev->resource->start + 1,
- dev->dev.bus_id);
- if (info->res == NULL) {
- dev_err(&dev->dev, "Could not reserve memory region\n");
- err = -ENOMEM;
- goto err_out;
- }
+ for (i = 0; i < dev->num_resources; i++) {
+ printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
+ (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
+ (unsigned long long)dev->resource[i].start);
+
+ info->res = request_mem_region(dev->resource[i].start,
+ dev->resource[i].end - dev->resource[i].start + 1,
+ dev->dev.bus_id);
+ if (info->res == NULL) {
+ dev_err(&dev->dev, "Could not reserve memory region\n");
+ err = -ENOMEM;
+ goto err_out;
+ }
- info->map.name = dev->dev.bus_id;
- info->map.phys = dev->resource->start;
- info->map.size = dev->resource->end - dev->resource->start + 1;
- info->map.bankwidth = physmap_data->width;
- info->map.set_vpp = physmap_data->set_vpp;
+ info->map[i].name = dev->dev.bus_id;
+ info->map[i].phys = dev->resource[i].start;
+ info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
+ info->map[i].bankwidth = physmap_data->width;
+ info->map[i].set_vpp = physmap_data->set_vpp;
+
+ info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size);
+ if (info->map[i].virt == NULL) {
+ dev_err(&dev->dev, "Failed to ioremap flash region\n");
+ err = EIO;
+ goto err_out;
+ }
- info->map.virt = ioremap(info->map.phys, info->map.size);
- if (info->map.virt == NULL) {
- dev_err(&dev->dev, "Failed to ioremap flash region\n");
- err = EIO;
- goto err_out;
- }
+ simple_map_init(&info->map[i]);
- simple_map_init(&info->map);
+ probe_type = rom_probe_types;
+ for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
+ info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
+ if (info->mtd[i] == NULL) {
+ dev_err(&dev->dev, "map_probe failed\n");
+ err = -ENXIO;
+ goto err_out;
+ } else {
+ devices_found++;
+ }
+ info->mtd[i]->owner = THIS_MODULE;
+ }
- 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(&dev->dev, "map_probe failed\n");
+ if (devices_found == 1) {
+ info->cmtd = info->mtd[0];
+ } else if (devices_found > 1) {
+ /*
+ * We detected multiple devices. Concatenate them together.
+ */
+#ifdef CONFIG_MTD_CONCAT
+ info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id);
+ if (info->cmtd == NULL)
+ err = -ENXIO;
+#else
+ printk(KERN_ERR "physmap-flash: multiple devices "
+ "found but MTD concat support disabled.\n");
err = -ENXIO;
- goto err_out;
+#endif
}
- info->mtd->owner = THIS_MODULE;
+ if (err)
+ goto err_out;
#ifdef CONFIG_MTD_PARTITIONS
- err = parse_mtd_partitions(info->mtd, part_probe_types, &info->parts, 0);
+ err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0);
if (err > 0) {
- add_mtd_partitions(info->mtd, info->parts, err);
+ add_mtd_partitions(info->cmtd, info->parts, err);
return 0;
}
if (physmap_data->nr_parts) {
printk(KERN_NOTICE "Using physmap partition information\n");
- add_mtd_partitions(info->mtd, physmap_data->parts,
- physmap_data->nr_parts);
+ add_mtd_partitions(info->cmtd, physmap_data->parts,
+ physmap_data->nr_parts);
return 0;
}
#endif
- add_mtd_device(info->mtd);
+ add_mtd_device(info->cmtd);
return 0;
err_out:
@@ -162,9 +200,11 @@ static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
int ret = 0;
+ int i;
if (info)
- ret = info->mtd->suspend(info->mtd);
+ for (i = 0; i < MAX_RESOURCES; i++)
+ ret |= info->mtd[i]->suspend(info->mtd[i]);
return ret;
}
@@ -172,27 +212,35 @@ static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state
static int physmap_flash_resume(struct platform_device *dev)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
+ int i;
+
if (info)
- info->mtd->resume(info->mtd);
+ for (i = 0; i < MAX_RESOURCES; i++)
+ info->mtd[i]->resume(info->mtd[i]);
return 0;
}
static void physmap_flash_shutdown(struct platform_device *dev)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
- if (info && info->mtd->suspend(info->mtd) == 0)
- info->mtd->resume(info->mtd);
+ int i;
+
+ for (i = 0; i < MAX_RESOURCES; i++)
+ if (info && info->mtd[i]->suspend(info->mtd[i]) == 0)
+ info->mtd[i]->resume(info->mtd[i]);
}
+#else
+#define physmap_flash_suspend NULL
+#define physmap_flash_resume NULL
+#define physmap_flash_shutdown NULL
#endif
static struct platform_driver physmap_flash_driver = {
.probe = physmap_flash_probe,
.remove = physmap_flash_remove,
-#ifdef CONFIG_PM
.suspend = physmap_flash_suspend,
.resume = physmap_flash_resume,
.shutdown = physmap_flash_shutdown,
-#endif
.driver = {
.name = "physmap-flash",
},
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 23:35:44 +0000