/* * $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $ * * Normal mappings of chips in physical memory * * Copyright (C) 2003 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * * 031022 - [jsun] add run-time configure and partition setup */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/device.h> #include <linux/platform_device.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> #include <linux/mtd/physmap.h> #include <asm/io.h> 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 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); } if (info->map.virt != NULL) iounmap(info->map.virt); if (info->res != NULL) { release_resource(info->res); kfree(info->res); } return 0; } 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) { 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: %.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; goto err_out; } 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; } 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; } 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; } info->mtd->owner = THIS_MODULE; #ifdef CONFIG_MTD_PARTITIONS 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 (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; } #ifdef CONFIG_PM 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; if (info) ret = info->mtd->suspend(info->mtd); return ret; } static int physmap_flash_resume(struct platform_device *dev) { struct physmap_flash_info *info = platform_get_drvdata(dev); if (info) info->mtd->resume(info->mtd); 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); } #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", }, }; #ifdef CONFIG_MTD_PHYSMAP_LEN #if CONFIG_MTD_PHYSMAP_LEN != 0 #warning using PHYSMAP compat code #define PHYSMAP_COMPAT #endif #endif #ifdef PHYSMAP_COMPAT static struct physmap_flash_data physmap_flash_data = { .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, }; static struct resource physmap_flash_resource = { .start = CONFIG_MTD_PHYSMAP_START, .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, .flags = IORESOURCE_MEM, }; 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 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 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; } 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>"); MODULE_DESCRIPTION("Generic configurable MTD map driver");