dm: pmic: max77686: Correct two typos in a comment

[karo-tx-uboot.git] / common / ddr_spd.c

diff --git a/common/ddr_spd.c b/common/ddr_spd.c
index a7a30de22bb567777f600f00e0b9d670523a316e..438e71afd2020b921e350ddf9ed7e2c6e1c98329 100644 (file)
--- a/common/ddr_spd.c
+++ b/common/ddr_spd.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2008 Freescale Semiconductor, Inc.
+ * Copyright 2008-2014 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
@@ -18,7 +18,7 @@ spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum)
 
        /*
         * Check SPD revision supported
-        * Rev 1.2 or less supported by this code
+        * Rev 1.X or less supported by this code
         */
        if (spd_rev >= 0x20) {
                printf("SPD revision %02X not supported by this code\n",
@@ -116,3 +116,46 @@ ddr3_spd_check(const ddr3_spd_eeprom_t *spd)
                return 1;
        }
 }
+
+unsigned int ddr4_spd_check(const struct ddr4_spd_eeprom_s *spd)
+{
+       char *p = (char *)spd;
+       int csum16;
+       int len;
+       char crc_lsb;   /* byte 126 */
+       char crc_msb;   /* byte 127 */
+
+       len = 126;
+       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) {
+               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;
+       }
+
+       p = (char *)((ulong)spd + 128);
+       len = 126;
+       csum16 = crc16(p, len);
+
+       crc_lsb = (char) (csum16 & 0xff);
+       crc_msb = (char) (csum16 >> 8);
+
+       if (spd->mod_section.uc[126] != crc_lsb ||
+           spd->mod_section.uc[127] != crc_msb) {
+               printf("SPD checksum unexpected.\n"
+                       "Checksum lsb in SPD = %02X, computed SPD = %02X\n"
+                       "Checksum msb in SPD = %02X, computed SPD = %02X\n",
+                       spd->mod_section.uc[126],
+                       crc_lsb, spd->mod_section.uc[127],
+                       crc_msb);
+               return 1;
+       }
+
+       return 0;
+}