diff options
author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
---|---|---|
committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
commit | 92988a21ad4c4c9504295ccb580c9f806134471b (patch) | |
tree | 5effc9f14170112450de05c67dafbe8d5034d595 /common/ddr_spd.c | |
parent | ca2b506783b676c95762c54ea24dcfdaae1947c9 (diff) | |
download | bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.zip bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.gz bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.bz2 |
added boot script files to repository
Diffstat (limited to 'common/ddr_spd.c')
-rw-r--r-- | common/ddr_spd.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/common/ddr_spd.c b/common/ddr_spd.c deleted file mode 100644 index a7a30de..0000000 --- a/common/ddr_spd.c +++ /dev/null @@ -1,118 +0,0 @@ -/* - * Copyright 2008 Freescale Semiconductor, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * Version 2 as published by the Free Software Foundation. - */ - -#include <common.h> -#include <ddr_spd.h> - -/* used for ddr1 and ddr2 spd */ -static int -spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum) -{ - unsigned int cksum = 0; - unsigned int i; - - /* - * Check SPD revision supported - * Rev 1.2 or less supported by this code - */ - if (spd_rev >= 0x20) { - printf("SPD revision %02X not supported by this code\n", - spd_rev); - return 1; - } - if (spd_rev > 0x13) { - printf("SPD revision %02X not verified by this code\n", - spd_rev); - } - - /* - * Calculate checksum - */ - for (i = 0; i < 63; i++) { - cksum += *buf++; - } - cksum &= 0xFF; - - if (cksum != spd_cksum) { - printf("SPD checksum unexpected. " - "Checksum in SPD = %02X, computed SPD = %02X\n", - spd_cksum, cksum); - return 1; - } - - return 0; -} - -unsigned int -ddr1_spd_check(const ddr1_spd_eeprom_t *spd) -{ - const u8 *p = (const u8 *)spd; - - return spd_check(p, spd->spd_rev, spd->cksum); -} - -unsigned int -ddr2_spd_check(const ddr2_spd_eeprom_t *spd) -{ - const u8 *p = (const u8 *)spd; - - return spd_check(p, spd->spd_rev, spd->cksum); -} - -/* - * CRC16 compute for DDR3 SPD - * Copied from DDR3 SPD spec. - */ -static int -crc16(char *ptr, int count) -{ - int crc, i; - - crc = 0; - while (--count >= 0) { - crc = crc ^ (int)*ptr++ << 8; - for (i = 0; i < 8; ++i) - if (crc & 0x8000) - crc = crc << 1 ^ 0x1021; - else - crc = crc << 1; - } - return crc & 0xffff; -} - -unsigned int -ddr3_spd_check(const ddr3_spd_eeprom_t *spd) -{ - char *p = (char *)spd; - int csum16; - int len; - char crc_lsb; /* byte 126 */ - char crc_msb; /* byte 127 */ - - /* - * SPD byte0[7] - CRC coverage - * 0 = CRC covers bytes 0~125 - * 1 = CRC covers bytes 0~116 - */ - - len = !(spd->info_size_crc & 0x80) ? 126 : 117; - csum16 = crc16(p, len); - - crc_lsb = (char) (csum16 & 0xff); - crc_msb = (char) (csum16 >> 8); - - if (spd->crc[0] == crc_lsb && spd->crc[1] == crc_msb) { - return 0; - } else { - printf("SPD checksum unexpected.\n" - "Checksum lsb in SPD = %02X, computed SPD = %02X\n" - "Checksum msb in SPD = %02X, computed SPD = %02X\n", - spd->crc[0], crc_lsb, spd->crc[1], crc_msb); - return 1; - } -} |