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-rw-r--r--src/soc/mediatek/mt8183/Makefile.inc1
-rw-r--r--src/soc/mediatek/mt8183/dramc_pi_basic_api.c111
-rw-r--r--src/soc/mediatek/mt8183/emi.c1
-rw-r--r--src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h6
4 files changed, 119 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc
index 944c9b1d18..e2076839de 100644
--- a/src/soc/mediatek/mt8183/Makefile.inc
+++ b/src/soc/mediatek/mt8183/Makefile.inc
@@ -25,6 +25,7 @@ verstage-y += ../common/wdt.c
romstage-y += auxadc.c
romstage-y += ../common/cbmem.c emi.c
romstage-y += dramc_init_setting.c
+romstage-y += dramc_pi_basic_api.c
romstage-y += memory.c
romstage-y += ../common/gpio.c gpio.c
romstage-y += ../common/mmu_operations.c mmu_operations.c
diff --git a/src/soc/mediatek/mt8183/dramc_pi_basic_api.c b/src/soc/mediatek/mt8183/dramc_pi_basic_api.c
new file mode 100644
index 0000000000..2cb0db2f1b
--- /dev/null
+++ b/src/soc/mediatek/mt8183/dramc_pi_basic_api.c
@@ -0,0 +1,111 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/io.h>
+#include <delay.h>
+#include <soc/emi.h>
+#include <soc/dramc_register.h>
+#include <soc/dramc_pi_api.h>
+
+static void sw_imp_cal_vref_sel(u8 term_option, u8 impcal_stage)
+{
+ u8 vref_sel = 0;
+
+ if (term_option == 1)
+ vref_sel = IMP_LP4X_TERM_VREF_SEL;
+ else {
+ switch (impcal_stage) {
+ case IMPCAL_STAGE_DRVP:
+ vref_sel = IMP_DRVP_LP4X_UNTERM_VREF_SEL;
+ break;
+ case IMPCAL_STAGE_DRVN:
+ vref_sel = IMP_DRVN_LP4X_UNTERM_VREF_SEL;
+ break;
+ default:
+ vref_sel = IMP_TRACK_LP4X_UNTERM_VREF_SEL;
+ break;
+ }
+ }
+
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_cmd[11], 0x3f << 8, vref_sel << 8);
+}
+
+void dramc_sw_impedance(const struct sdram_params *params)
+{
+ u8 term = 0, ca_term = ODT_OFF, dq_term = ODT_ON;
+ u32 sw_impedance[2][4] = {0};
+
+ for (term = 0; term < 2; term++)
+ for (u8 i = 0; i < 4; i++)
+ sw_impedance[term][i] = params->impedance[term][i];
+
+ sw_impedance[ODT_OFF][2] = sw_impedance[ODT_ON][2];
+ sw_impedance[ODT_OFF][3] = sw_impedance[ODT_ON][3];
+
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_cmd[11], 0xff, 0x3);
+ sw_imp_cal_vref_sel(dq_term, IMPCAL_STAGE_DRVP);
+
+ /* DQ */
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[0], (0x1f << 5) | (0x1f << 0),
+ (sw_impedance[dq_term][0] << 5) |
+ (sw_impedance[dq_term][1] << 0));
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[1],
+ (0x1f << 25)|(0x1f << 20) | (1 << 31),
+ (sw_impedance[dq_term][0] << 25) |
+ (sw_impedance[dq_term][1] << 20) | (!dq_term << 31));
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[2], (0x1f << 5) | (0x1f << 0),
+ (sw_impedance[dq_term][2] << 5) |
+ (sw_impedance[dq_term][3] << 0));
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[3], (0x1f << 25) | (0x1f << 20),
+ (sw_impedance[dq_term][2] << 25) |
+ (sw_impedance[dq_term][3] << 20));
+
+ /* DQS */
+ for (u8 i = 0; i <= 2; i += 2) {
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[i],
+ (0x1f << 25) | (0x1f << 20),
+ (sw_impedance[dq_term][i] << 25) |
+ (sw_impedance[dq_term][i + 1] << 20));
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[i],
+ (0x1f << 15) | (0x1f << 10),
+ (sw_impedance[dq_term][i] << 15) |
+ (sw_impedance[dq_term][i + 1] << 10));
+ }
+
+ /* CMD & CLK */
+ for (u8 i = 1; i <= 3; i += 2) {
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[i],
+ (0x1f << 15) | (0x1f << 10),
+ (sw_impedance[ca_term][i - 1] << 15) |
+ (sw_impedance[ca_term][i] << 10));
+ clrsetbits_le32(&ch[0].ao.shu[0].drving[i],
+ (0x1f << 5) | (0x1f << 0),
+ (sw_impedance[ca_term][i - 1] << 5) |
+ (sw_impedance[ca_term][i] << 0));
+ }
+
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_cmd[11], 0x1f << 17,
+ sw_impedance[ca_term][0] << 17);
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_cmd[11], 0x1f << 22,
+ sw_impedance[ca_term][1] << 22);
+
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_cmd[3],
+ SHU1_CA_CMD3_RG_TX_ARCMD_PU_PRE_MASK,
+ 1 << SHU1_CA_CMD3_RG_TX_ARCMD_PU_PRE_SHIFT);
+ clrbits_le32(&ch[0].phy.shu[0].ca_cmd[0],
+ SHU1_CA_CMD0_RG_TX_ARCLK_DRVN_PRE_MASK);
+
+ clrsetbits_le32(&ch[0].phy.shu[0].ca_dll[1], 0x1f << 16, 0x9 << 16);
+}
diff --git a/src/soc/mediatek/mt8183/emi.c b/src/soc/mediatek/mt8183/emi.c
index 286c87253a..811e1303ab 100644
--- a/src/soc/mediatek/mt8183/emi.c
+++ b/src/soc/mediatek/mt8183/emi.c
@@ -280,6 +280,7 @@ static void init_dram(const struct sdram_params *params)
dramc_set_broadcast(DRAMC_BROADCAST_ON);
dramc_init_pre_settings();
+ dramc_sw_impedance(params);
dramc_init();
emi_init2(params);
diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
index ecdff82bc8..e4300891ec 100644
--- a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
@@ -39,6 +39,11 @@
#define DRAMC_BROADCAST_OFF 0x0
#define MAX_BACKUP_REG_CNT 32
+#define IMP_LP4X_TERM_VREF_SEL 0x1b
+#define IMP_DRVP_LP4X_UNTERM_VREF_SEL 0x1a
+#define IMP_DRVN_LP4X_UNTERM_VREF_SEL 0x16
+#define IMP_TRACK_LP4X_UNTERM_VREF_SEL 0x1a
+
enum dram_te_op {
TE_OP_WRITE_READ_CHECK = 0,
TE_OP_READ_CHECK
@@ -133,4 +138,5 @@ void dramc_get_rank_size(u64 *dram_rank_size);
void dramc_set_broadcast(u32 onoff);
u32 dramc_get_broadcast(void);
void dramc_init(void);
+void dramc_sw_impedance(const struct sdram_params *params);
#endif /* _DRAMC_PI_API_MT8183_H */