diff options
Diffstat (limited to 'drivers/mtd/maps/h720x-flash.c')
| -rw-r--r-- | drivers/mtd/maps/h720x-flash.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/mtd/maps/h720x-flash.c b/drivers/mtd/maps/h720x-flash.c new file mode 100644 index 000000000000..c73828171d9b --- /dev/null +++ b/drivers/mtd/maps/h720x-flash.c @@ -0,0 +1,144 @@ +/* + * Flash memory access on Hynix GMS30C7201/HMS30C7202 based + * evaluation boards + * + * $Id: h720x-flash.c,v 1.11 2004/11/04 13:24:14 gleixner Exp $ + * + * (C) 2002 Jungjun Kim <jungjun.kim@hynix.com> + * 2003 Thomas Gleixner <tglx@linutronix.de> + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/slab.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> +#include <asm/hardware.h> +#include <asm/io.h> + +static struct mtd_info *mymtd; + +static struct map_info h720x_map = { + .name = "H720X", + .bankwidth = 4, + .size = FLASH_SIZE, + .phys = FLASH_PHYS, +}; + +static struct mtd_partition h720x_partitions[] = { + { + .name = "ArMon", + .size = 0x00080000, + .offset = 0, + .mask_flags = MTD_WRITEABLE + },{ + .name = "Env", + .size = 0x00040000, + .offset = 0x00080000, + .mask_flags = MTD_WRITEABLE + },{ + .name = "Kernel", + .size = 0x00180000, + .offset = 0x000c0000, + .mask_flags = MTD_WRITEABLE + },{ + .name = "Ramdisk", + .size = 0x00400000, + .offset = 0x00240000, + .mask_flags = MTD_WRITEABLE + },{ + .name = "jffs2", + .size = MTDPART_SIZ_FULL, + .offset = MTDPART_OFS_APPEND + } +}; + +#define NUM_PARTITIONS (sizeof(h720x_partitions)/sizeof(h720x_partitions[0])) + +static int nr_mtd_parts; +static struct mtd_partition *mtd_parts; +static const char *probes[] = { "cmdlinepart", NULL }; + +/* + * Initialize FLASH support + */ +int __init h720x_mtd_init(void) +{ + + char *part_type = NULL; + + h720x_map.virt = ioremap(FLASH_PHYS, FLASH_SIZE); + + if (!h720x_map.virt) { + printk(KERN_ERR "H720x-MTD: ioremap failed\n"); + return -EIO; + } + + simple_map_init(&h720x_map); + + // Probe for flash bankwidth 4 + printk (KERN_INFO "H720x-MTD probing 32bit FLASH\n"); + mymtd = do_map_probe("cfi_probe", &h720x_map); + if (!mymtd) { + printk (KERN_INFO "H720x-MTD probing 16bit FLASH\n"); + // Probe for bankwidth 2 + h720x_map.bankwidth = 2; + mymtd = do_map_probe("cfi_probe", &h720x_map); + } + + if (mymtd) { + mymtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + nr_mtd_parts = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0); + if (nr_mtd_parts > 0) + part_type = "command line"; +#endif + if (nr_mtd_parts <= 0) { + mtd_parts = h720x_partitions; + nr_mtd_parts = NUM_PARTITIONS; + part_type = "builtin"; + } + printk(KERN_INFO "Using %s partition table\n", part_type); + add_mtd_partitions(mymtd, mtd_parts, nr_mtd_parts); + return 0; + } + + iounmap((void *)h720x_map.virt); + return -ENXIO; +} + +/* + * Cleanup + */ +static void __exit h720x_mtd_cleanup(void) +{ + + if (mymtd) { + del_mtd_partitions(mymtd); + map_destroy(mymtd); + } + + /* Free partition info, if commandline partition was used */ + if (mtd_parts && (mtd_parts != h720x_partitions)) + kfree (mtd_parts); + + if (h720x_map.virt) { + iounmap((void *)h720x_map.virt); + h720x_map.virt = 0; + } +} + + +module_init(h720x_mtd_init); +module_exit(h720x_mtd_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); +MODULE_DESCRIPTION("MTD map driver for Hynix evaluation boards"); |