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ram: rk3399: Configure soc odt support

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CTL 145, 146, 159, 160 registers are used to configure
soc odt on rk3399.

These soc odt values are updated from CS0_MR22_VAL and
CS1_MR22_VAL and for lpddr4 these values ORed with
tsel_rd_select_n.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
This commit is contained in:
Jagan Teki 2019-07-16 17:27:24 +05:30 • committed by Kever Yang
parent aa30aae8b4
commit f288d54936
1 changed files with 48 additions and 1 deletions
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49
drivers/ram/rockchip/sdram_rk3399.c
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@ -40,6 +40,8 @@
#define PHY_SLEWP_EN 0x1
#define PHY_SLEWN_EN 0x1
#define PHY_RX_CM_INPUT 0x1
#define CS0_MR22_VAL 0
#define CS1_MR22_VAL 3
#define CRU_SFTRST_DDR_CTRL(ch, n) ((0x1 << (8 + 16 + (ch) * 4)) | \
((n) << (8 + (ch) * 4)))
@ -554,7 +556,7 @@ static void set_ds_odt(const struct chan_info *chan,
const struct rk3399_sdram_params *params, u32 mr5)
{
u32 *denali_phy = chan->publ->denali_phy;
u32 *denali_ctl = chan->pctl->denali_ctl;
u32 tsel_idle_en, tsel_wr_en, tsel_rd_en;
u32 tsel_idle_select_p, tsel_rd_select_p;
u32 tsel_idle_select_n, tsel_rd_select_n;
@ -562,6 +564,7 @@ static void set_ds_odt(const struct chan_info *chan,
u32 tsel_wr_select_dq_n, tsel_wr_select_ca_n;
u32 tsel_ckcs_select_p, tsel_ckcs_select_n;
struct io_setting *io = NULL;
u32 soc_odt = 0;
u32 reg_value;
if (params->base.dramtype == LPDDR4) {
@ -581,6 +584,35 @@ static void set_ds_odt(const struct chan_info *chan,
tsel_ckcs_select_p = io->wr_ckcs_drv;
tsel_ckcs_select_n = PHY_DRV_ODT_34_3;
switch (tsel_rd_select_n) {
case PHY_DRV_ODT_240:
soc_odt = 1;
break;
case PHY_DRV_ODT_120:
soc_odt = 2;
break;
case PHY_DRV_ODT_80:
soc_odt = 3;
break;
case PHY_DRV_ODT_60:
soc_odt = 4;
break;
case PHY_DRV_ODT_48:
soc_odt = 5;
break;
case PHY_DRV_ODT_40:
soc_odt = 6;
break;
case PHY_DRV_ODT_34_3:
soc_odt = 6;
printf("%s: Unable to support LPDDR4 MR22 Soc ODT\n",
__func__);
break;
case PHY_DRV_ODT_HI_Z:
default:
soc_odt = 0;
break;
}
} else if (params->base.dramtype == LPDDR3) {
tsel_rd_select_p = PHY_DRV_ODT_240;
tsel_rd_select_n = PHY_DRV_ODT_HI_Z;
@ -621,6 +653,21 @@ static void set_ds_odt(const struct chan_info *chan,
tsel_wr_en = 0;
tsel_idle_en = 0;
/* F0_0 */
clrsetbits_le32(&denali_ctl[145], 0xFF << 16,
(soc_odt | (CS0_MR22_VAL << 3)) << 16);
/* F2_0, F1_0 */
clrsetbits_le32(&denali_ctl[146], 0xFF00FF,
((soc_odt | (CS0_MR22_VAL << 3)) << 16) |
(soc_odt | (CS0_MR22_VAL << 3)));
/* F0_1 */
clrsetbits_le32(&denali_ctl[159], 0xFF << 16,
(soc_odt | (CS1_MR22_VAL << 3)) << 16);
/* F2_1, F1_1 */
clrsetbits_le32(&denali_ctl[160], 0xFF00FF,
((soc_odt | (CS1_MR22_VAL << 3)) << 16) |
(soc_odt | (CS1_MR22_VAL << 3)));
/*
* phy_dq_tsel_select_X 24bits DENALI_PHY_6/134/262/390 offset_0
* sets termination values for read/idle cycles and drive strength