From 6bb72e4ab9217d4071330eac512f7cba4728accf Mon Sep 17 00:00:00 2001 From: Huayang Duan Date: Wed, 26 Sep 2018 16:16:38 +0800 Subject: mediatek/mt8183: Add DDR driver of write leveling part BUG=b:80501386 BRANCH=none TEST=Boots correctly on Kukui, and inits DRAM successfully with related patches. Change-Id: Ibde5f613c61c36f5c9b405326fd18a3fd16cca56 Signed-off-by: Huayang Duan Reviewed-on: https://review.coreboot.org/28840 Tested-by: build bot (Jenkins) Reviewed-by: Hung-Te Lin --- src/soc/mediatek/mt8183/dramc_pi_calibration_api.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c b/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c index 3f4bd94639..823c512507 100644 --- a/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c +++ b/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c @@ -80,6 +80,25 @@ static void dramc_mode_reg_write_by_rank(u8 chn, u8 rank, clrsetbits_le32(&ch[chn].ao.mrs, MRS_MRSRK_MASK, mrs_back); } +static void dramc_write_leveling(u8 chn, u8 rank, + const u8 wr_level[CHANNEL_MAX][RANK_MAX][DQS_NUMBER]) +{ + clrsetbits_le32(&ch[chn].phy.shu[0].rk[rank].ca_cmd[9], + SHU1_CA_CMD9_RG_RK_ARFINE_TUNE_CLK_MASK, 0); + + for (u8 i = 0; i < DQS_NUMBER; i++) { + s32 wrlevel_dq_delay = wr_level[chn][rank][i] + 0x10; + assert(wrlevel_dq_delay < 0x40); + + clrsetbits_le32(&ch[chn].phy.shu[0].rk[rank].b[i].dq[7], + FINE_TUNE_PBYTE_MASK | FINE_TUNE_DQM_MASK | + FINE_TUNE_DQ_MASK, + (wr_level[chn][rank][i] << FINE_TUNE_PBYTE_SHIFT) | + (wrlevel_dq_delay << FINE_TUNE_DQM_SHIFT) | + (wrlevel_dq_delay << FINE_TUNE_DQ_SHIFT)); + } +} + static void cmd_bus_training(u8 chn, u8 rank, const struct sdram_params *params) { @@ -275,6 +294,8 @@ void dramc_calibrate_all_channels(const struct sdram_params *pams) dramc_show("Start K ch:%d, rank:%d\n", chn, rk); auto_refresh_switch(chn, 0); cmd_bus_training(chn, rk, pams); + dramc_write_leveling(chn, rk, pams->wr_level); + auto_refresh_switch(chn, 1); } } } -- cgit v1.2.3