diff options
Diffstat (limited to 'linux-2.4.x/drivers/mtd/maps/physmap.c')
| -rw-r--r-- | linux-2.4.x/drivers/mtd/maps/physmap.c | 177 |
1 files changed, 79 insertions, 98 deletions
diff --git a/linux-2.4.x/drivers/mtd/maps/physmap.c b/linux-2.4.x/drivers/mtd/maps/physmap.c index 182429b..f49ebc3 100644 --- a/linux-2.4.x/drivers/mtd/maps/physmap.c +++ b/linux-2.4.x/drivers/mtd/maps/physmap.c @@ -1,139 +1,120 @@ /* - * $Id: physmap.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp $ + * $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 <asm/io.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> - -#define WINDOW_ADDR CONFIG_MTD_PHYSMAP_START -#define WINDOW_SIZE CONFIG_MTD_PHYSMAP_LEN -#define BUSWIDTH CONFIG_MTD_PHYSMAP_BUSWIDTH - -static struct mtd_partition *parsed_parts; static struct mtd_info *mymtd; -__u8 physmap_read8(struct map_info *map, unsigned long ofs) -{ - return __raw_readb(map->map_priv_1 + ofs); -} - -__u16 physmap_read16(struct map_info *map, unsigned long ofs) -{ - return __raw_readw(map->map_priv_1 + ofs); -} - -__u32 physmap_read32(struct map_info *map, unsigned long ofs) -{ - return __raw_readl(map->map_priv_1 + ofs); -} - -void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) -{ - memcpy_fromio(to, map->map_priv_1 + from, len); -} +struct map_info physmap_map = { + .name = "phys_mapped_flash", + .phys = CONFIG_MTD_PHYSMAP_START, + .size = CONFIG_MTD_PHYSMAP_LEN, + .bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH, +}; -void physmap_write8(struct map_info *map, __u8 d, unsigned long adr) -{ - __raw_writeb(d, map->map_priv_1 + adr); - mb(); -} +#ifdef CONFIG_MTD_PARTITIONS +static struct mtd_partition *mtd_parts; +static int mtd_parts_nb; -void physmap_write16(struct map_info *map, __u16 d, unsigned long adr) -{ - __raw_writew(d, map->map_priv_1 + adr); - mb(); -} +static int num_physmap_partitions; +static struct mtd_partition *physmap_partitions; -void physmap_write32(struct map_info *map, __u32 d, unsigned long adr) -{ - __raw_writel(d, map->map_priv_1 + adr); - mb(); -} +static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; -void physmap_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len) +void physmap_set_partitions(struct mtd_partition *parts, int num_parts) { - memcpy_toio(map->map_priv_1 + to, from, len); + physmap_partitions=parts; + num_physmap_partitions=num_parts; } +#endif /* CONFIG_MTD_PARTITIONS */ -struct map_info physmap_map = { - name: "Physically mapped flash", - size: WINDOW_SIZE, - buswidth: BUSWIDTH, - read8: physmap_read8, - read16: physmap_read16, - read32: physmap_read32, - copy_from: physmap_copy_from, - write8: physmap_write8, - write16: physmap_write16, - write32: physmap_write32, - copy_to: physmap_copy_to -}; - -int __init init_physmap(void) +static int __init init_physmap(void) { - struct mtd_partition *parts; - int nb_parts = 0, ret; - int parsed_nr_parts = 0; - const char *part_type; + static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL }; + const char **type; - printk(KERN_NOTICE "physmap flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR); - physmap_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE); + 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); - if (!physmap_map.map_priv_1) { + if (!physmap_map.virt) { printk("Failed to ioremap\n"); return -EIO; } - mymtd = do_map_probe("jedec_probe", &physmap_map); - if (!mymtd) { - iounmap((void *)physmap_map.map_priv_1); - return -ENXIO; - } - mymtd->module = THIS_MODULE; + simple_map_init(&physmap_map); + + mymtd = NULL; + type = rom_probe_types; + for(; !mymtd && *type; type++) { + mymtd = do_map_probe(*type, &physmap_map); + } + if (mymtd) { + mymtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes, + &mtd_parts, 0); + + if (mtd_parts_nb > 0) + { + add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb); + return 0; + } + + 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_CMDLINE_PARTS - if (parsed_nr_parts == 0) { - int ret = parse_cmdline_partitions(mymtd, &parsed_parts, "physmap"); - if (ret > 0) { - part_type = "Command Line"; - parsed_nr_parts = ret; - } - } #endif + add_mtd_device(mymtd); + + return 0; + } - if (parsed_nr_parts > 0) { - parts = parsed_parts; - nb_parts = parsed_nr_parts; - } - - if (nb_parts == 0) { - printk(KERN_NOTICE "physmap: no partition info available, registering whole flash at once\n"); - add_mtd_device(mymtd); - } else { - printk(KERN_NOTICE "physmap: Using %s partition definition\n", part_type); - add_mtd_partitions(mymtd, parts, nb_parts); - } - return 0; + iounmap(physmap_map.virt); + return -ENXIO; } static void __exit cleanup_physmap(void) { - if (mymtd) { +#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); - map_destroy(mymtd); - } - if (physmap_map.map_priv_1) { - iounmap((void *)physmap_map.map_priv_1); - physmap_map.map_priv_1 = 0; } +#else + del_mtd_device(mymtd); +#endif + map_destroy(mymtd); + + iounmap(physmap_map.virt); + physmap_map.virt = NULL; } module_init(init_physmap); |