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/export.h>
12#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;
 
 
20static const char *part_probe_types[] = {
21	"cmdlinepart",
22#ifdef CONFIG_MTD_REDBOOT_PARTS
23	"RedBoot",
24#endif
25	NULL
26};
27
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;
54		/* 8-bit bus (0 + 1) or 16-bit bus (1 + 1) */
55		flash_map.bankwidth = region_cfg.s.width + 1;
56		flash_map.virt = ioremap(flash_map.phys, flash_map.size);
57		pr_notice("Bootbus flash: Setting flash for %luMB flash at "
58			  "0x%08llx\n", flash_map.size >> 20, flash_map.phys);
59		simple_map_init(&flash_map);
60		mymtd = do_map_probe("cfi_probe", &flash_map);
61		if (mymtd) {
62			mymtd->owner = THIS_MODULE;
63			mtd_device_parse_register(mymtd, part_probe_types,
64						  NULL, NULL, 0);
 
 
 
65		} else {
66			pr_err("Failed to register MTD device for flash\n");
67		}
68	}
69	return 0;
70}
71
72late_initcall(flash_init);

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