diff options
| author | Huayang Duan <huayang.duan@mediatek.com> | 2020-06-30 10:22:39 +0800 |
|---|---|---|
| committer | Hung-Te Lin <hungte@chromium.org> | 2021-01-19 01:30:55 +0000 |
| commit | c37b9aa9f013882d2a2e86ec21f8c0364af9e09e (patch) | |
| tree | 8484569c24bfccf52b82f1535e43d095e2785e53 /src/soc/mediatek/mt8192/dramc_pi_basic_api.c | |
| parent | 58ba83fe74238cc79d858411bdc3e3ba2e842b12 (diff) | |
soc/mediatek/mt8192: Get DDR base information after calibration
After calibration, we can get ddr vendor id or density info from
MR5 or MR8, this helps to make sure the DDR HW is as we expected.
Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Change-Id: Ie62948368716d309aab8149372b2b6093fc33552
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44712
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Diffstat (limited to 'src/soc/mediatek/mt8192/dramc_pi_basic_api.c')
| -rw-r--r-- | src/soc/mediatek/mt8192/dramc_pi_basic_api.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8192/dramc_pi_basic_api.c b/src/soc/mediatek/mt8192/dramc_pi_basic_api.c index e2ca919260..7f8d83a4d3 100644 --- a/src/soc/mediatek/mt8192/dramc_pi_basic_api.c +++ b/src/soc/mediatek/mt8192/dramc_pi_basic_api.c @@ -3833,6 +3833,41 @@ static void dramc_zq_calibration(const struct ddr_cali *cali, u8 chn, u8 rank) write32(regs_bak[i].addr, regs_bak[i].value); } +u8 dramc_mode_reg_read(u8 chn, u8 mr_idx) +{ + const u32 timeout = 10000; + u8 value; + + SET32_BITFIELDS(&ch[chn].ao.swcmd_ctrl0, SWCMD_CTRL0_MRSMA, mr_idx); + SET32_BITFIELDS(&ch[chn].ao.swcmd_en, SWCMD_EN_MRREN, 1); + + /* Wait until MRW command fired */ + if (!wait_ms(timeout, READ32_BITFIELD(&ch[chn].nao.spcmdresp, + SPCMDRESP_MRR_RESPONSE))) { + dramc_err("Read mode register time out\n"); + return -1; + } + + value = READ32_BITFIELD(&ch[chn].nao.mrr_status, MRR_STATUS_MRR_SW_REG); + SET32_BITFIELDS(&ch[chn].ao.swcmd_en, SWCMD_EN_MRREN, 0); + dramc_dbg("Read MR%d = %#x\n", mr_idx, value); + + return value; +} + +u8 dramc_mode_reg_read_by_rank(u8 chn, u8 rank, u8 mr_idx) +{ + u8 value; + u8 rank_bak; + + rank_bak = READ32_BITFIELD(&ch[chn].ao.swcmd_ctrl0, SWCMD_CTRL0_MRSRK); + SET32_BITFIELDS(&ch[chn].ao.swcmd_ctrl0, SWCMD_CTRL0_MRSRK, rank); + value = dramc_mode_reg_read(chn, mr_idx); + SET32_BITFIELDS(&ch[chn].ao.swcmd_ctrl0, SWCMD_CTRL0_MRSRK, rank_bak); + + return value; +} + void dramc_mode_reg_write_by_rank(const struct ddr_cali *cali, u8 chn, u8 rank, u8 mr_idx, u8 value) { |