diff options
Diffstat (limited to 'drivers/mtd/maps/pb1xxx-flash.c')
| -rw-r--r-- | drivers/mtd/maps/pb1xxx-flash.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/mtd/maps/pb1xxx-flash.c b/drivers/mtd/maps/pb1xxx-flash.c new file mode 100644 index 00000000000..06e73154055 --- /dev/null +++ b/drivers/mtd/maps/pb1xxx-flash.c @@ -0,0 +1,178 @@ +/* + * Flash memory access on Alchemy Pb1xxx boards + * + * (C) 2001 Pete Popov <ppopov@mvista.com> + * + * $Id: pb1xxx-flash.c,v 1.14 2004/11/04 13:24:15 gleixner Exp $ + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/kernel.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> + +#ifdef DEBUG_RW +#define DBG(x...) printk(x) +#else +#define DBG(x...) +#endif + +#ifdef CONFIG_MIPS_PB1000 + +#define WINDOW_ADDR 0x1F800000 +#define WINDOW_SIZE 0x800000 + +static struct mtd_partition pb1xxx_partitions[] = { + { + .name = "yamon env", + .size = 0x00020000, + .offset = 0, + .mask_flags = MTD_WRITEABLE}, + { + .name = "User FS", + .size = 0x003e0000, + .offset = 0x20000,}, + { + .name = "boot code", + .size = 0x100000, + .offset = 0x400000, + .mask_flags = MTD_WRITEABLE}, + { + .name = "raw/kernel", + .size = 0x300000, + .offset = 0x500000} +}; + +#elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100) + +#if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER) +/* both 32MB banks will be used. Combine the first 32MB bank and the + * first 28MB of the second bank together into a single jffs/jffs2 + * partition. + */ +#define WINDOW_ADDR 0x1C000000 +#define WINDOW_SIZE 0x4000000 +static struct mtd_partition pb1xxx_partitions[] = { + { + .name = "User FS", + .size = 0x3c00000, + .offset = 0x0000000 + },{ + .name = "yamon", + .size = 0x0100000, + .offset = 0x3c00000, + .mask_flags = MTD_WRITEABLE + },{ + .name = "raw kernel", + .size = 0x02c0000, + .offset = 0x3d00000 + } +}; +#elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER) +#define WINDOW_ADDR 0x1E000000 +#define WINDOW_SIZE 0x2000000 +static struct mtd_partition pb1xxx_partitions[] = { + { + .name = "User FS", + .size = 0x1c00000, + .offset = 0x0000000 + },{ + .name = "yamon", + .size = 0x0100000, + .offset = 0x1c00000, + .mask_flags = MTD_WRITEABLE + },{ + .name = "raw kernel", + .size = 0x02c0000, + .offset = 0x1d00000 + } +}; +#elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER) +#define WINDOW_ADDR 0x1C000000 +#define WINDOW_SIZE 0x2000000 +static struct mtd_partition pb1xxx_partitions[] = { + { + .name = "User FS", + .size = 0x1e00000, + .offset = 0x0000000 + },{ + .name = "raw kernel", + .size = 0x0200000, + .offset = 0x1e00000, + } +}; +#else +#error MTD_PB1500 define combo error /* should never happen */ +#endif +#else +#error Unsupported board +#endif + +#define NAME "Pb1x00 Linux Flash" +#define PADDR WINDOW_ADDR +#define BUSWIDTH 4 +#define SIZE WINDOW_SIZE +#define PARTITIONS 4 + +static struct map_info pb1xxx_mtd_map = { + .name = NAME, + .size = SIZE, + .bankwidth = BUSWIDTH, + .phys = PADDR, +}; + +static struct mtd_info *pb1xxx_mtd; + +int __init pb1xxx_mtd_init(void) +{ + struct mtd_partition *parts; + int nb_parts = 0; + char *part_type; + + /* + * Static partition definition selection + */ + part_type = "static"; + parts = pb1xxx_partitions; + nb_parts = ARRAY_SIZE(pb1xxx_partitions); + + /* + * Now let's probe for the actual flash. Do it here since + * specific machine settings might have been set above. + */ + printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n", + BUSWIDTH*8); + pb1xxx_mtd_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); + + simple_map_init(&pb1xxx_mtd_map); + + pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map); + if (!pb1xxx_mtd) return -ENXIO; + pb1xxx_mtd->owner = THIS_MODULE; + + add_mtd_partitions(pb1xxx_mtd, parts, nb_parts); + return 0; +} + +static void __exit pb1xxx_mtd_cleanup(void) +{ + if (pb1xxx_mtd) { + del_mtd_partitions(pb1xxx_mtd); + map_destroy(pb1xxx_mtd); + iounmap((void *) pb1xxx_mtd_map.virt); + } +} + +module_init(pb1xxx_mtd_init); +module_exit(pb1xxx_mtd_cleanup); + +MODULE_AUTHOR("Pete Popov"); +MODULE_DESCRIPTION("Pb1xxx CFI map driver"); +MODULE_LICENSE("GPL"); |