1 files changed, 187 insertions, 69 deletions

diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index f49ebc3c4606..76ce9bd943aa 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -14,112 +14,230 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <asm/io.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/config.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
+#include <asm/io.h>
+#include <asm/mach/flash.h>
 
-static struct mtd_info *mymtd;
-
-struct map_info physmap_map = {
-        .name = "phys_mapped_flash",
-        .phys = CONFIG_MTD_PHYSMAP_START,
-        .size = CONFIG_MTD_PHYSMAP_LEN,
-        .bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH,
+struct physmap_flash_info {
+        struct mtd_info         *mtd;
+        struct map_info         map;
+        struct resource         *res;
+#ifdef CONFIG_MTD_PARTITIONS
+        int                     nr_parts;
+        struct mtd_partition    *parts;
+#endif
 };
 
+
+static int physmap_flash_remove(struct platform_device *dev)
+{
+        struct physmap_flash_info *info;
+        struct physmap_flash_data *physmap_data;
+
+        info = platform_get_drvdata(dev);
+        if (info == NULL)
+                return 0;
+        platform_set_drvdata(dev, NULL);
+
+        physmap_data = dev->dev.platform_data;
+
+        if (info->mtd != NULL) {
 #ifdef CONFIG_MTD_PARTITIONS
-static struct mtd_partition *mtd_parts;
-static int                   mtd_parts_nb;
+                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);
+                }
+#else
+                del_mtd_device(info->mtd);
+#endif
+                map_destroy(info->mtd);
+        }
 
-static int num_physmap_partitions;
-static struct mtd_partition *physmap_partitions;
+        if (info->map.virt != NULL)
+                iounmap((void *)info->map.virt);
 
-static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
+        if (info->res != NULL) {
+                release_resource(info->res);
+                kfree(info->res);
+        }
 
-void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
-{
-        physmap_partitions=parts;
-        num_physmap_partitions=num_parts;
+        return 0;
 }
-#endif /* CONFIG_MTD_PARTITIONS */
 
-static int __init init_physmap(void)
+static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
+#endif
+
+static int physmap_flash_probe(struct platform_device *dev)
 {
-        static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
-        const char **type;
+        struct physmap_flash_data *physmap_data;
+        struct physmap_flash_info *info;
+        const char **probe_type;
+        int err;
+
+        physmap_data = dev->dev.platform_data;
+        if (physmap_data == NULL)
+                return -ENODEV;
+
+        printk(KERN_NOTICE "physmap platform flash device: %.8lx at %.8lx\n",
+                dev->resource->end - dev->resource->start + 1,
+                dev->resource->start);
+
+        info = kmalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
+        if (info == NULL) {
+                err = -ENOMEM;
+                goto err_out;
+        }
+        memset(info, 0, sizeof(*info));
 
-        printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys);
-        physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size);
+        platform_set_drvdata(dev, info);
 
-        if (!physmap_map.virt) {
-                printk("Failed to ioremap\n");
-                return -EIO;
+        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;
         }
 
-        simple_map_init(&physmap_map);
+        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.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;
+        }
 
-        mymtd = NULL;
-        type = rom_probe_types;
-        for(; !mymtd && *type; type++) {
-                mymtd = do_map_probe(*type, &physmap_map);
+        simple_map_init(&info->map);
+
+        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");
+                err = -ENXIO;
+                goto err_out;
         }
-        if (mymtd) {
-                mymtd->owner = THIS_MODULE;
+        info->mtd->owner = THIS_MODULE;
 
 #ifdef CONFIG_MTD_PARTITIONS
-                mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes,
-                                                    &mtd_parts, 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;
+        }
 
-                if (mtd_parts_nb > 0)
-                {
-                        add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
-                        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);
+                return 0;
+        }
+#endif
+
+        add_mtd_device(info->mtd);
+        return 0;
+
+err_out:
+        physmap_flash_remove(dev);
+        return err;
+}
+
+static struct platform_driver physmap_flash_driver = {
+        .probe          = physmap_flash_probe,
+        .remove         = physmap_flash_remove,
+        .driver         = {
+                .name   = "physmap-flash",
+        },
+};
 
-                if (num_physmap_partitions != 0)
-                {
-                        printk(KERN_NOTICE
-                               "Using physmap partition definition\n");
-                        add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions);
-                        return 0;
-                }
 
+#ifdef CONFIG_MTD_PHYSMAP_LEN
+#if CONFIG_MTD_PHYSMAP_LEN != 0
+#warning using PHYSMAP compat code
+#define PHYSMAP_COMPAT
+#endif
 #endif
-                add_mtd_device(mymtd);
 
-                return 0;
-        }
+#ifdef PHYSMAP_COMPAT
+static struct physmap_flash_data physmap_flash_data = {
+        .width          = CONFIG_MTD_PHYSMAP_BANKWIDTH,
+};
 
-        iounmap(physmap_map.virt);
-        return -ENXIO;
-}
+static struct resource physmap_flash_resource = {
+        .start          = CONFIG_MTD_PHYSMAP_START,
+        .end            = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN,
+        .flags          = IORESOURCE_MEM,
+};
 
-static void __exit cleanup_physmap(void)
+static struct platform_device physmap_flash = {
+        .name           = "physmap-flash",
+        .id             = 0,
+        .dev            = {
+                .platform_data  = &physmap_flash_data,
+        },
+        .num_resources  = 1,
+        .resource       = &physmap_flash_resource,
+};
+
+void physmap_configure(unsigned long addr, unsigned long size,
+                int bankwidth, void (*set_vpp)(struct map_info *, int))
 {
+        physmap_flash_resource.start = addr;
+        physmap_flash_resource.end = addr + size - 1;
+        physmap_flash_data.width = bankwidth;
+        physmap_flash_data.set_vpp = set_vpp;
+}
+
 #ifdef CONFIG_MTD_PARTITIONS
-        if (mtd_parts_nb) {
-                del_mtd_partitions(mymtd);
-                kfree(mtd_parts);
-        } else if (num_physmap_partitions) {
-                del_mtd_partitions(mymtd);
-        } else {
-                del_mtd_device(mymtd);
-        }
-#else
-        del_mtd_device(mymtd);
+void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
+{
+        physmap_flash_data.nr_parts = num_parts;
+        physmap_flash_data.parts = parts;
+}
+#endif
 #endif
-        map_destroy(mymtd);
 
-        iounmap(physmap_map.virt);
-        physmap_map.virt = NULL;
+static int __init physmap_init(void)
+{
+        int err;
+
+        err = platform_driver_register(&physmap_flash_driver);
+#ifdef PHYSMAP_COMPAT
+        if (err == 0)
+                platform_device_register(&physmap_flash);
+#endif
+
+        return err;
 }
 
-module_init(init_physmap);
-module_exit(cleanup_physmap);
+static void __exit physmap_exit(void)
+{
+#ifdef PHYSMAP_COMPAT
+        platform_device_unregister(&physmap_flash);
+#endif
+        platform_driver_unregister(&physmap_flash_driver);
+}
 
+module_init(physmap_init);
+module_exit(physmap_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");