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deciphered SDRAM initialization values (SDCR and SDMR) with Coldfire preprocessor macros

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This commit is contained in:
Markus Fröschle
2013-02-05 16:33:35 +00:00
parent 075062972b
commit d81879b86a
1 changed files with 16 additions and 0 deletions
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16
sources/sysinit.c
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@@ -284,9 +284,25 @@ void init_ddram(void)
MCF_SDRAMC_SDCFG2 = 0x46770000; /* SDCFG2 */ MCF_SDRAMC_SDCFG2 = 0x46770000; /* SDCFG2 */
#endif /* _NOT_USED_ */ #endif /* _NOT_USED_ */
MCF_SDRAMC_SDCR = MCF_SDRAMC_SDCR_IPALL /* initiate Precharge All command */
| MCF_SDRAMC_SDCR_RCNT(13) /* Refresh Count (= (x + 1) * 64 */
| MCF_SDRAMC_SDCR_MUX(1) /* Muxing control */
| MCF_SDRAMC_SDCR_DDR
| MCF_SDRAMC_SDCR_CKE
| MCF_SDRAMC_SDCR_MODE_EN;
MCF_SDRAMC_SDMR = MCF_SDRAMC_SDMR_CMD /* Generate an LMR/LEMR command */
| MCF_SDRAMC_SDMR_AD(0) /* Address */
| MCF_SDRAMC_SDMR_BNKAD(1); /* LEMR */
MCF_SDRAMC_SDMR = MCF_SDRAMC_SDMR_CMD /* Generate an LMR/LEMR command */
| MCF_SDRAMC_SDMR_AD(0x123)
| MCF_SDRAMC_SDMR_BNKAD(0); /* LMR */
#ifdef _NOT_USED_
MCF_SDRAMC_SDCR = 0xE10D0002; /* SDCR + IPALL */ MCF_SDRAMC_SDCR = 0xE10D0002; /* SDCR + IPALL */
MCF_SDRAMC_SDMR = 0x40010000; /* SDMR (write to LEMR) */ MCF_SDRAMC_SDMR = 0x40010000; /* SDMR (write to LEMR) */
MCF_SDRAMC_SDMR = 0x048D0000; /* SDRM (write to LMR) */ MCF_SDRAMC_SDMR = 0x048D0000; /* SDRM (write to LMR) */
#endif /* _NOT_USED_ */
MCF_SDRAMC_SDCR = 0xE10D0002; /* SDCR + IPALL */ MCF_SDRAMC_SDCR = 0xE10D0002; /* SDCR + IPALL */
MCF_SDRAMC_SDCR = 0xE10D0004; /* SDCR + IREF (first refresh) */ MCF_SDRAMC_SDCR = 0xE10D0004; /* SDCR + IREF (first refresh) */
MCF_SDRAMC_SDCR = 0xE10D0004; /* SDCR + IREF (second refresh) */ MCF_SDRAMC_SDCR = 0xE10D0004; /* SDCR + IREF (second refresh) */