void simple_map_init(struct map_info *map)
{
BUG_ON(!map_bankwidth_supported(map->bankwidth));
map->read = simple_map_read;
map->write = simple_map_write;
map->copy_from = simple_map_copy_from;
map->copy_to = simple_map_copy_to;
}
static int __init initrd_device_setup(void)
{
int ret = 0;
if (phys_initrd_start) {
if (map_bankwidth_supported(4))
initrd_mtd_ram_data.bankwidth = 4;
else if (map_bankwidth_supported(2))
initrd_mtd_ram_data.bankwidth = 2;
else
initrd_mtd_ram_data.bankwidth = 1;
initrd_mtd_ram_resource.start = phys_initrd_start;
initrd_mtd_ram_resource.end = phys_initrd_start
+ phys_initrd_size - 1;
ret = platform_device_register(&initrd_mtd_ram_device);
}
return ret;
}
/**
* Module/ driver initialization.
*
* Returns Zero on success
*/
static int octeon_flash_probe(struct platform_device *pdev)
{
union cvmx_mio_boot_reg_cfgx region_cfg;
u32 cs;
int r;
struct device_node *np = pdev->dev.of_node;
r = of_property_read_u32(np, "reg", &cs);
if (r)
return r;
/*
* Read the bootbus region 0 setup to determine the base
* address of the flash.
*/
region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
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;
/* 8-bit bus (0 + 1) or 16-bit bus (1 + 1) */
flash_map.bankwidth = region_cfg.s.width + 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);
WARN_ON(!map_bankwidth_supported(flash_map.bankwidth));
flash_map.read = octeon_flash_map_read;
flash_map.write = octeon_flash_map_write;
flash_map.copy_from = octeon_flash_map_copy_from;
flash_map.copy_to = octeon_flash_map_copy_to;
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");
}
}
