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/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Martin Lundholm <martin.xa.lundholm@stericsson.com> for
* ST-Ericsson.
*
* License terms: GNU General Public License (GPL), version 2.
*
* cspsa_fp.c
*
* Implementation of CSPSA Fast Parameters. CSPSA is an acronym for Crash
* Safe Parameter Storage.
*
*/
#include <asm/arch/cpu.h>
#include <asm/arch/cspsa_fp.h>
#include <malloc.h>
#include <part.h>
/* -------------------------------------------------------------------------- */
#define CSPSA_HEADER_MAGIC 0x00415350
#define CSPSA_HEADER_VERSION 2
/* -------------------------------------------------------------------------- */
struct cspsa_header {
u32 magic;
u32 version;
u32 index;
u32 flags;
u32 data_size;
u32 crc32_data;
u32 crc32_header;
u32 fast_parameter[CSPSA_NBR_OF_FAST_PARAMETERS];
u32 reserved[4];
u32 bbt_size;
u32 bbt[];
};
/* -------------------------------------------------------------------------- */
/*
* CRC32 lookup table based on polynom 0x04C11DB7. Must use the same CRC32
* algorithm as in main CSPSA implementation.
*/
static const u32 crc_table[256] = {
0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 0x4C11DB70, 0x48D0C6C7,
0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3,
0x709F7B7A, 0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58, 0xBAEA46EF,
0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB,
0xCEB42022, 0xCA753D95, 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1,
0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0,
0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4,
0x0808D07D, 0x0CC9CDCA, 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE,
0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08,
0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC,
0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6,
0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A, 0xE0B41DE7, 0xE4750050,
0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,
0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637,
0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB, 0x4F040D56, 0x4BC510E1,
0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5,
0x3F9B762C, 0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E, 0xF5EE4BB9,
0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD,
0xCDA1F604, 0xC960EBB3, 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7,
0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71,
0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2,
0x470CDD2B, 0x43CDC09C, 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8,
0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E,
0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A,
0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0,
0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C, 0xE3A1CBC1, 0xE760D676,
0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662,
0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668,
0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4,
};
static u32 cspsa_crc32_calc(u32 crc_value, uint8_t *data, u32 data_size)
{
u32 i;
u32 j;
crc_value = ~crc_value;
for (j = 0; j < data_size; j++) {
i = ((u32) (crc_value >> 24) ^ *data++) & 0xFF;
crc_value = (crc_value << 8) ^ crc_table[i];
}
crc_value = ~crc_value;
return crc_value;
}
/* -------------------------------------------------------------------------- */
static u32 calc_crc32_header(struct cspsa_header *cspsa_header)
{
u32 crc_value = CSPSA_HEADER_MAGIC;
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->magic,
sizeof(cspsa_header->magic));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->version,
sizeof(cspsa_header->version));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->index,
sizeof(cspsa_header->index));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->flags,
sizeof(cspsa_header->flags));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->data_size,
sizeof(cspsa_header->data_size));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->crc32_data,
sizeof(cspsa_header->crc32_data));
/* - Skip crc32_header. */
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->fast_parameter,
sizeof(cspsa_header->fast_parameter));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->reserved,
sizeof(cspsa_header->reserved));
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->bbt_size,
sizeof(cspsa_header->bbt_size));
if (cspsa_header->bbt_size > 0)
crc_value =
cspsa_crc32_calc(
crc_value,
(u8 *) &cspsa_header->bbt,
cspsa_header->bbt_size);
return crc_value;
}
/* -------------------------------------------------------------------------- */
static int find_cspsa_area(block_dev_desc_t *block_dev, u32 *start_block,
u32 *size_in_blocks) {
u32 offset;
u32 size;
u32 loadaddr;
if (get_entry_info_toc(block_dev, CSPSA_PARTITION_NAME, &offset,
&size, &loadaddr)) {
HREF_PRINTF("Find_cspsa_area: get_entry_info_toc failed\n");
return 1;
}
(void) loadaddr;
*start_block = offset / block_dev->blksz;
*size_in_blocks = (size / block_dev->blksz);
if ((*size_in_blocks < 2) || (size % block_dev->blksz))
return 1;
return 0;
}
/* -------------------------------------------------------------------------- */
int cspsa_fp_read(block_dev_desc_t *block_dev, u32 key, u32 *value)
{
u32 start_block;
u32 size_in_blocks;
int result = 1;
struct cspsa_header *first_header = NULL;
struct cspsa_header *last_header = NULL;
u32 first_header_valid = 0;
u32 last_header_valid = 0;
u32 n;
/* Check that the requested item is a valid fast parameter. */
if (key >= CSPSA_NBR_OF_FAST_PARAMETERS)
goto error_exit;
if (find_cspsa_area(block_dev, &start_block, &size_in_blocks))
goto error_exit;
first_header = (struct cspsa_header *) malloc(block_dev->blksz);
last_header = (struct cspsa_header *) malloc(block_dev->blksz);
if ((first_header == NULL) || (last_header == NULL))
goto error_exit;
/* Read header at start of area and check header CRC32. */
n = block_dev->block_read(block_dev->dev,
start_block,
1,
first_header);
if (n != 1)
goto error_exit;
/* Read header at end of area and check header CRC32. */
n = block_dev->block_read(block_dev->dev,
start_block + size_in_blocks - 1,
1,
last_header);
if (n != 1)
goto error_exit;
first_header_valid =
(first_header->magic == CSPSA_HEADER_MAGIC) &&
(first_header->version == CSPSA_HEADER_VERSION) &&
(calc_crc32_header(first_header) == first_header->crc32_header);
last_header_valid =
(last_header->magic == CSPSA_HEADER_MAGIC) &&
(last_header->version == CSPSA_HEADER_VERSION) &&
(calc_crc32_header(last_header) == last_header->crc32_header);
if (first_header_valid && last_header_valid) {
/* If both headers are valid use the header with lowest index */
if (first_header->index < last_header->index)
*value = first_header->fast_parameter[key];
else
*value = last_header->fast_parameter[key];
} else if (first_header_valid)
*value = first_header->fast_parameter[key];
else if (last_header_valid)
*value = last_header->fast_parameter[key];
else
/* No valid header was found */
goto error_exit;
result = 0;
error_exit:
if (first_header)
free(first_header);
if (last_header)
free(last_header);
return result;
}
/* -------------------------------------------------------------------------- */
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