diff options
| author | Andreas Bießmann <andreas.biessmann@corscience.de> | 2013-09-06 15:04:58 +0200 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-11-01 15:55:59 -0400 |
| commit | 0178296588fe3004238c77d3dc0996d82b8c8ca1 (patch) | |
| tree | 4242b68dcef70fc977eb42671d4edce2a04cce23 /board | |
| parent | eadbdf9efccd318d6388a1fcc9a6bb67e9caea43 (diff) | |
| download | u-boot-imx-0178296588fe3004238c77d3dc0996d82b8c8ca1.zip u-boot-imx-0178296588fe3004238c77d3dc0996d82b8c8ca1.tar.gz u-boot-imx-0178296588fe3004238c77d3dc0996d82b8c8ca1.tar.bz2 | |
tricorder: support 256MiB SDRAM on revision > D
Signed-off-by: Andreas Bießmann <andreas.biessmann@corscience.de>
Diffstat (limited to 'board')
| -rw-r--r-- | board/corscience/tricorder/tricorder.c | 45 |
1 files changed, 38 insertions, 7 deletions
diff --git a/board/corscience/tricorder/tricorder.c b/board/corscience/tricorder/tricorder.c index fb5d036..2dfcb27 100644 --- a/board/corscience/tricorder/tricorder.c +++ b/board/corscience/tricorder/tricorder.c @@ -154,12 +154,43 @@ int board_mmc_init(bd_t *bis) */ void get_board_mem_timings(struct board_sdrc_timings *timings) { - /* General SDRC config */ - timings->mcfg = MICRON_V_MCFG_165(128 << 20); - timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; + struct tricorder_eeprom eeprom; + get_eeprom(&eeprom); - /* AC timings */ - timings->ctrla = MICRON_V_ACTIMA_165; - timings->ctrlb = MICRON_V_ACTIMB_165; - timings->mr = MICRON_V_MR_165; + /* General SDRC config */ + if (eeprom.board_version[0] > 'D') { + /* use optimized timings for our SDRAM device */ + timings->mcfg = MCFG((256 << 20), 14); +#define MT46H64M32_TDAL 6 /* Twr/Tck + Trp/tck */ + /* 15/6 + 18/6 = 5.5 -> 6 */ +#define MT46H64M32_TDPL 3 /* 15/6 = 2.5 -> 3 (Twr) */ +#define MT46H64M32_TRRD 2 /* 12/6 = 2 */ +#define MT46H64M32_TRCD 3 /* 18/6 = 3 */ +#define MT46H64M32_TRP 3 /* 18/6 = 3 */ +#define MT46H64M32_TRAS 7 /* 42/6 = 7 */ +#define MT46H64M32_TRC 10 /* 60/6 = 10 */ +#define MT46H64M32_TRFC 12 /* 72/6 = 12 */ + timings->ctrla = ACTIM_CTRLA(MT46H64M32_TRFC, MT46H64M32_TRC, + MT46H64M32_TRAS, MT46H64M32_TRP, + MT46H64M32_TRCD, MT46H64M32_TRRD, + MT46H64M32_TDPL, + MT46H64M32_TDAL); + +#define MT46H64M32_TWTR 1 +#define MT46H64M32_TCKE 1 +#define MT46H64M32_XSR 19 /* 112.5/6 = 18.75 => ~19 */ +#define MT46H64M32_TXP 1 + timings->ctrlb = ACTIM_CTRLB(MT46H64M32_TWTR, MT46H64M32_TCKE, + MT46H64M32_TXP, MT46H64M32_XSR); + + timings->mr = MICRON_V_MR_165; + timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; + } else { + /* use conservative beagleboard timings as default */ + timings->mcfg = MICRON_V_MCFG_165(128 << 20); + timings->ctrla = MICRON_V_ACTIMA_165; + timings->ctrlb = MICRON_V_ACTIMB_165; + timings->mr = MICRON_V_MR_165; + timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; + } } |