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Diffstat (limited to 'src/soc/rockchip/rk3399')
-rw-r--r--src/soc/rockchip/rk3399/sdram.c85
1 files changed, 76 insertions, 9 deletions
diff --git a/src/soc/rockchip/rk3399/sdram.c b/src/soc/rockchip/rk3399/sdram.c
index c3db47bcf6..a237a80c7b 100644
--- a/src/soc/rockchip/rk3399/sdram.c
+++ b/src/soc/rockchip/rk3399/sdram.c
@@ -318,22 +318,86 @@ static void phy_io_config(u32 channel,
const struct rk3399_sdram_params *sdram_params)
{
u32 *denali_phy = rk3399_ddr_publ[channel]->denali_phy;
- u32 vref_mode, vref_value;
+ u32 vref_mode_dq, vref_value_dq, vref_mode_ac, vref_value_ac;
u32 mode_sel = 0;
u32 reg_value;
+ u32 drv_value, odt_value;
/* vref setting */
- if (sdram_params->dramtype == LPDDR4)
- vref_mode = 0x6;
- else if (sdram_params->dramtype == LPDDR3)
- vref_mode = 0x2;
- else if (sdram_params->dramtype == DDR3)
- vref_mode = 0x1;
+ if (sdram_params->dramtype == LPDDR4) {
+ /* LPDDR4 */
+ vref_mode_dq = 0x6;
+ vref_value_dq = 0x1f;
+ vref_mode_ac = 0x6;
+ vref_value_ac = 0x1f;
+ } else if (sdram_params->dramtype == LPDDR3) {
+ if (sdram_params->odt == 1) {
+ vref_mode_dq = 0x5; /* LPDDR3 ODT */
+ drv_value = (read32(&denali_phy[6]) >> 12) & 0xf;
+ odt_value = (read32(&denali_phy[6]) >> 4) & 0xf;
+ if (drv_value == PHY_DRV_ODT_48) {
+ switch (odt_value) {
+ case PHY_DRV_ODT_240:
+ vref_value_dq = 0x16;
+ break;
+ case PHY_DRV_ODT_120:
+ vref_value_dq = 0x26;
+ break;
+ case PHY_DRV_ODT_60:
+ vref_value_dq = 0x36;
+ break;
+ default:
+ die("Halting: Invalid ODT value.\n");
+ }
+ } else if (drv_value == PHY_DRV_ODT_40) {
+ switch (odt_value) {
+ case PHY_DRV_ODT_240:
+ vref_value_dq = 0x19;
+ break;
+ case PHY_DRV_ODT_120:
+ vref_value_dq = 0x23;
+ break;
+ case PHY_DRV_ODT_60:
+ vref_value_dq = 0x31;
+ break;
+ default:
+ die("Halting: Invalid ODT value.\n");
+ }
+ } else if (drv_value == PHY_DRV_ODT_34_3) {
+ switch (odt_value) {
+ case PHY_DRV_ODT_240:
+ vref_value_dq = 0x17;
+ break;
+ case PHY_DRV_ODT_120:
+ vref_value_dq = 0x20;
+ break;
+ case PHY_DRV_ODT_60:
+ vref_value_dq = 0x2e;
+ break;
+ default:
+ die("Halting: Invalid ODT value.\n");
+ }
+ } else {
+ die("Halting: Invalid DRV value.\n");
+ }
+ } else {
+ vref_mode_dq = 0x2; /* LPDDR3 */
+ vref_value_dq = 0x1f;
+ }
+ vref_mode_ac = 0x2;
+ vref_value_ac = 0x1f;
+ } else if (sdram_params->dramtype == DDR3) {
+ /* DDR3L */
+ vref_mode_dq = 0x1;
+ vref_value_dq = 0x1f;
+ vref_mode_ac = 0x1;
+ vref_value_ac = 0x1f;
+ }
else
die("Halting: Unknown DRAM type.\n");
- vref_value = 0x1f;
- reg_value = (vref_mode << 9) | (0x1 << 8) | vref_value;
+ reg_value = (vref_mode_dq << 9) | (0x1 << 8) | vref_value_dq;
+
/* PHY_913 PHY_PAD_VREF_CTRL_DQ_0 12bits offset_8 */
clrsetbits_le32(&denali_phy[913], 0xfff << 8, reg_value << 8);
/* PHY_914 PHY_PAD_VREF_CTRL_DQ_1 12bits offset_0 */
@@ -342,6 +406,9 @@ static void phy_io_config(u32 channel,
clrsetbits_le32(&denali_phy[914], 0xfff << 16, reg_value << 16);
/* PHY_915 PHY_PAD_VREF_CTRL_DQ_3 12bits offset_0 */
clrsetbits_le32(&denali_phy[915], 0xfff, reg_value);
+
+ reg_value = (vref_mode_ac << 9) | (0x1 << 8) | vref_value_ac;
+
/* PHY_915 PHY_PAD_VREF_CTRL_AC 12bits offset_16 */
clrsetbits_le32(&denali_phy[915], 0xfff << 16, reg_value << 16);