diff options
| -rw-r--r-- | drivers/mtd/maps/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/mtd/maps/physmap.c | 256 | ||||
| -rw-r--r-- | include/linux/mtd/physmap.h | 21 |
3 files changed, 196 insertions, 83 deletions
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 80d6810e88e..b2becd7d433 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -37,7 +37,7 @@ config MTD_PHYSMAP_START config MTD_PHYSMAP_LEN hex "Physical length of flash mapping" depends on MTD_PHYSMAP - default "0x4000000" + default "0" help This is the total length of the mapping of the flash chips on your particular board. If there is space, or aliases, in the diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c index f49ebc3c460..76ce9bd943a 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>"); diff --git a/include/linux/mtd/physmap.h b/include/linux/mtd/physmap.h index c7b8bcdef01..50f954461aa 100644 --- a/include/linux/mtd/physmap.h +++ b/include/linux/mtd/physmap.h @@ -24,22 +24,18 @@ #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> -/* - * The map_info for physmap. Board can override size, buswidth, phys, - * (*set_vpp)(), etc in their initial setup routine. - */ -extern struct map_info physmap_map; +struct physmap_flash_data { + unsigned int width; + void (*set_vpp)(struct map_info *, int); + unsigned int nr_parts; + struct mtd_partition *parts; +}; /* * Board needs to specify the exact mapping during their setup time. */ -static inline void physmap_configure(unsigned long addr, unsigned long size, int bankwidth, void (*set_vpp)(struct map_info *, int) ) -{ - physmap_map.phys = addr; - physmap_map.size = size; - physmap_map.bankwidth = bankwidth; - physmap_map.set_vpp = set_vpp; -} +void physmap_configure(unsigned long addr, unsigned long size, + int bankwidth, void (*set_vpp)(struct map_info *, int) ); #if defined(CONFIG_MTD_PARTITIONS) @@ -58,4 +54,3 @@ void physmap_set_partitions(struct mtd_partition *parts, int num_parts); #endif /* defined(CONFIG_MTD) */ #endif /* __LINUX_MTD_PHYSMAP__ */ - |