diff options
Diffstat (limited to 'arch/mips/cavium-octeon/flash_setup.c')
| -rw-r--r-- | arch/mips/cavium-octeon/flash_setup.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/flash_setup.c b/arch/mips/cavium-octeon/flash_setup.c new file mode 100644 index 00000000..e44a55bc --- /dev/null +++ b/arch/mips/cavium-octeon/flash_setup.c @@ -0,0 +1,71 @@ +/* + * Octeon Bootbus flash setup + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2007, 2008 Cavium Networks + */ +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/octeon/octeon.h> + +static struct map_info flash_map; +static struct mtd_info *mymtd; +static const char *part_probe_types[] = { + "cmdlinepart", +#ifdef CONFIG_MTD_REDBOOT_PARTS + "RedBoot", +#endif + NULL +}; + +/** + * Module/ driver initialization. + * + * Returns Zero on success + */ +static int __init flash_init(void) +{ + /* + * Read the bootbus region 0 setup to determine the base + * address of the flash. + */ + union cvmx_mio_boot_reg_cfgx region_cfg; + region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0)); + if (region_cfg.s.en) { + /* + * The bootloader always takes the flash and sets its + * address so the entire flash fits below + * 0x1fc00000. This way the flash aliases to + * 0x1fc00000 for booting. Software can access the + * full flash at the true address, while core boot can + * access 4MB. + */ + /* Use this name so old part lines work */ + flash_map.name = "phys_mapped_flash"; + flash_map.phys = region_cfg.s.base << 16; + flash_map.size = 0x1fc00000 - flash_map.phys; + flash_map.bankwidth = 1; + flash_map.virt = ioremap(flash_map.phys, flash_map.size); + pr_notice("Bootbus flash: Setting flash for %luMB flash at " + "0x%08llx\n", flash_map.size >> 20, flash_map.phys); + simple_map_init(&flash_map); + mymtd = do_map_probe("cfi_probe", &flash_map); + if (mymtd) { + mymtd->owner = THIS_MODULE; + mtd_device_parse_register(mymtd, part_probe_types, + NULL, NULL, 0); + } else { + pr_err("Failed to register MTD device for flash\n"); + } + } + return 0; +} + +late_initcall(flash_init); |