blob: 237e5b1a72d8e51357c3a38edc9120565e460dbd [file] [log] [blame]
David Daney5b3b1682009-01-08 16:46:40 -08001/*
2 * Octeon Bootbus flash setup
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2007, 2008 Cavium Networks
9 */
10#include <linux/kernel.h>
Paul Gortmakercae39d12011-07-28 18:46:31 -040011#include <linux/export.h>
David Daney5b3b1682009-01-08 16:46:40 -080012#include <linux/mtd/mtd.h>
13#include <linux/mtd/map.h>
14#include <linux/mtd/partitions.h>
15
16#include <asm/octeon/octeon.h>
17
18static struct map_info flash_map;
19static struct mtd_info *mymtd;
David Daney5b3b1682009-01-08 16:46:40 -080020static const char *part_probe_types[] = {
21 "cmdlinepart",
22#ifdef CONFIG_MTD_REDBOOT_PARTS
23 "RedBoot",
24#endif
25 NULL
26};
David Daney5b3b1682009-01-08 16:46:40 -080027
28/**
29 * Module/ driver initialization.
30 *
31 * Returns Zero on success
32 */
33static int __init flash_init(void)
34{
35 /*
36 * Read the bootbus region 0 setup to determine the base
37 * address of the flash.
38 */
39 union cvmx_mio_boot_reg_cfgx region_cfg;
40 region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0));
41 if (region_cfg.s.en) {
42 /*
43 * The bootloader always takes the flash and sets its
44 * address so the entire flash fits below
45 * 0x1fc00000. This way the flash aliases to
46 * 0x1fc00000 for booting. Software can access the
47 * full flash at the true address, while core boot can
48 * access 4MB.
49 */
50 /* Use this name so old part lines work */
51 flash_map.name = "phys_mapped_flash";
52 flash_map.phys = region_cfg.s.base << 16;
53 flash_map.size = 0x1fc00000 - flash_map.phys;
Charles Hardin0f731712012-09-05 19:19:48 +000054 /* 8-bit bus (0 + 1) or 16-bit bus (1 + 1) */
55 flash_map.bankwidth = region_cfg.s.width + 1;
David Daney5b3b1682009-01-08 16:46:40 -080056 flash_map.virt = ioremap(flash_map.phys, flash_map.size);
57 pr_notice("Bootbus flash: Setting flash for %luMB flash at "
Ralf Baechle12e22e82009-03-30 14:49:41 +020058 "0x%08llx\n", flash_map.size >> 20, flash_map.phys);
David Daney5b3b1682009-01-08 16:46:40 -080059 simple_map_init(&flash_map);
60 mymtd = do_map_probe("cfi_probe", &flash_map);
61 if (mymtd) {
62 mymtd->owner = THIS_MODULE;
David Daneyb2f90942011-11-10 17:59:45 +000063 mtd_device_parse_register(mymtd, part_probe_types,
Artem Bityutskiy42d7fbe2012-03-09 19:24:26 +020064 NULL, NULL, 0);
David Daney5b3b1682009-01-08 16:46:40 -080065 } else {
66 pr_err("Failed to register MTD device for flash\n");
67 }
68 }
69 return 0;
70}
71
72late_initcall(flash_init);