Commit | Line | Data |
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5b3b1688 DD |
1 | /* |
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> | |
11 | #include <linux/mtd/mtd.h> | |
12 | #include <linux/mtd/map.h> | |
13 | #include <linux/mtd/partitions.h> | |
14 | ||
15 | #include <asm/octeon/octeon.h> | |
16 | ||
17 | static struct map_info flash_map; | |
18 | static struct mtd_info *mymtd; | |
19 | #ifdef CONFIG_MTD_PARTITIONS | |
20 | static int nr_parts; | |
21 | static struct mtd_partition *parts; | |
22 | static const char *part_probe_types[] = { | |
23 | "cmdlinepart", | |
24 | #ifdef CONFIG_MTD_REDBOOT_PARTS | |
25 | "RedBoot", | |
26 | #endif | |
27 | NULL | |
28 | }; | |
29 | #endif | |
30 | ||
31 | /** | |
32 | * Module/ driver initialization. | |
33 | * | |
34 | * Returns Zero on success | |
35 | */ | |
36 | static int __init flash_init(void) | |
37 | { | |
38 | /* | |
39 | * Read the bootbus region 0 setup to determine the base | |
40 | * address of the flash. | |
41 | */ | |
42 | union cvmx_mio_boot_reg_cfgx region_cfg; | |
43 | region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0)); | |
44 | if (region_cfg.s.en) { | |
45 | /* | |
46 | * The bootloader always takes the flash and sets its | |
47 | * address so the entire flash fits below | |
48 | * 0x1fc00000. This way the flash aliases to | |
49 | * 0x1fc00000 for booting. Software can access the | |
50 | * full flash at the true address, while core boot can | |
51 | * access 4MB. | |
52 | */ | |
53 | /* Use this name so old part lines work */ | |
54 | flash_map.name = "phys_mapped_flash"; | |
55 | flash_map.phys = region_cfg.s.base << 16; | |
56 | flash_map.size = 0x1fc00000 - flash_map.phys; | |
57 | flash_map.bankwidth = 1; | |
58 | flash_map.virt = ioremap(flash_map.phys, flash_map.size); | |
59 | pr_notice("Bootbus flash: Setting flash for %luMB flash at " | |
60 | "0x%08lx\n", flash_map.size >> 20, flash_map.phys); | |
61 | simple_map_init(&flash_map); | |
62 | mymtd = do_map_probe("cfi_probe", &flash_map); | |
63 | if (mymtd) { | |
64 | mymtd->owner = THIS_MODULE; | |
65 | ||
66 | #ifdef CONFIG_MTD_PARTITIONS | |
67 | nr_parts = parse_mtd_partitions(mymtd, | |
68 | part_probe_types, | |
69 | &parts, 0); | |
70 | if (nr_parts > 0) | |
71 | add_mtd_partitions(mymtd, parts, nr_parts); | |
72 | else | |
73 | add_mtd_device(mymtd); | |
74 | #else | |
75 | add_mtd_device(mymtd); | |
76 | #endif | |
77 | } else { | |
78 | pr_err("Failed to register MTD device for flash\n"); | |
79 | } | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | late_initcall(flash_init); |