From 2fb2de33b2d89442d08a7d69f6afb9c7e46aa992 Mon Sep 17 00:00:00 2001 From: Jagan Teki Date: Tue, 16 Jul 2019 17:27:22 +0530 Subject: [PATCH] ram: sdram: Configure lpddr4 tsel rd, wr based on IO settings Now we have IO settings available for all supported sdram frequencies, so retrieve these IO settings and make used for LPDDR4 ds odt configuration. Signed-off-by: Jagan Teki Signed-off-by: YouMin Chen --- drivers/ram/rockchip/sdram_rk3399.c | 42 +++++++++++++++++++++++++++++++------ 1 file changed, 36 insertions(+), 6 deletions(-) diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 9121d5b..5a2d50f 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -184,6 +184,33 @@ struct io_setting { }, }; +/** + * phy = 0, PHY boot freq + * phy = 1, PHY index 0 + * phy = 2, PHY index 1 + */ +static struct io_setting * +lpddr4_get_io_settings(const struct rk3399_sdram_params *params, u32 mr5) +{ + struct io_setting *io = NULL; + u32 n; + + for (n = 0; n < ARRAY_SIZE(lpddr4_io_setting); n++) { + io = &lpddr4_io_setting[n]; + + if (io->mr5 != 0) { + if (io->mhz >= params->base.ddr_freq && + io->mr5 == mr5) + break; + } else { + if (io->mhz >= params->base.ddr_freq) + break; + } + } + + return io; +} + static void *get_ddrc0_con(struct dram_info *dram, u8 channel) { return (channel == 0) ? &dram->grf->ddrc0_con0 : &dram->grf->ddrc0_con1; @@ -524,7 +551,7 @@ static int phy_io_config(const struct chan_info *chan, } static void set_ds_odt(const struct chan_info *chan, - const struct rk3399_sdram_params *params) + const struct rk3399_sdram_params *params, u32 mr5) { u32 *denali_phy = chan->publ->denali_phy; @@ -533,19 +560,22 @@ static void set_ds_odt(const struct chan_info *chan, u32 tsel_idle_select_n, tsel_rd_select_n; u32 tsel_wr_select_dq_p, tsel_wr_select_ca_p; u32 tsel_wr_select_dq_n, tsel_wr_select_ca_n; + struct io_setting *io = NULL; u32 reg_value; if (params->base.dramtype == LPDDR4) { + io = lpddr4_get_io_settings(params, mr5); + tsel_rd_select_p = PHY_DRV_ODT_HI_Z; - tsel_rd_select_n = PHY_DRV_ODT_240; + tsel_rd_select_n = io->rd_odt; tsel_idle_select_p = PHY_DRV_ODT_HI_Z; tsel_idle_select_n = PHY_DRV_ODT_240; - tsel_wr_select_dq_p = PHY_DRV_ODT_40; + tsel_wr_select_dq_p = io->wr_dq_drv; tsel_wr_select_dq_n = PHY_DRV_ODT_40; - tsel_wr_select_ca_p = PHY_DRV_ODT_40; + tsel_wr_select_ca_p = io->wr_ca_drv; tsel_wr_select_ca_n = PHY_DRV_ODT_40; } else if (params->base.dramtype == LPDDR3) { tsel_rd_select_p = PHY_DRV_ODT_240; @@ -723,7 +753,7 @@ static void pctl_start(struct dram_info *dram, u8 channel) } static int pctl_cfg(struct dram_info *dram, const struct chan_info *chan, - u32 channel, const struct rk3399_sdram_params *params) + u32 channel, struct rk3399_sdram_params *params) { u32 *denali_ctl = chan->pctl->denali_ctl; u32 *denali_pi = chan->pi->denali_pi; @@ -805,7 +835,7 @@ static int pctl_cfg(struct dram_info *dram, const struct chan_info *chan, copy_to_reg(&denali_phy[512], ¶ms_phy[512], (549 - 512 + 1) * 4); copy_to_reg(&denali_phy[640], ¶ms_phy[640], (677 - 640 + 1) * 4); copy_to_reg(&denali_phy[768], ¶ms_phy[768], (805 - 768 + 1) * 4); - set_ds_odt(chan, params); + set_ds_odt(chan, params, 0); /* * phy_dqs_tsel_wr_timing_X 8bits DENALI_PHY_84/212/340/468 offset_8 -- 2.7.4