diff options
| -rw-r--r-- | drivers/ram/rockchip/sdram_rk3399.c | 122 |
1 files changed, 100 insertions, 22 deletions
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 8bbacb5275..9df2f840ab 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -1254,13 +1254,52 @@ static unsigned char calculate_stride(struct rk3399_sdram_params *params) return stride; } +static void clear_channel_params(struct rk3399_sdram_params *params, u8 channel) +{ + params->ch[channel].cap_info.rank = 0; + params->ch[channel].cap_info.col = 0; + params->ch[channel].cap_info.bk = 0; + params->ch[channel].cap_info.bw = 32; + params->ch[channel].cap_info.dbw = 32; + params->ch[channel].cap_info.row_3_4 = 0; + params->ch[channel].cap_info.cs0_row = 0; + params->ch[channel].cap_info.cs1_row = 0; + params->ch[channel].cap_info.ddrconfig = 0; +} + +static int pctl_init(struct dram_info *dram, struct rk3399_sdram_params *params) +{ + int channel; + int ret; + + for (channel = 0; channel < 2; channel++) { + const struct chan_info *chan = &dram->chan[channel]; + struct rk3399_cru *cru = dram->cru; + struct rk3399_ddr_publ_regs *publ = chan->publ; + + phy_pctrl_reset(cru, channel); + phy_dll_bypass_set(publ, params->base.ddr_freq); + + ret = pctl_cfg(dram, chan, channel, params); + if (ret < 0) { + printf("%s: pctl config failed\n", __func__); + return ret; + } + + /* start to trigger initialization */ + pctl_start(dram, channel); + } + + return 0; +} + static int sdram_init(struct dram_info *dram, struct rk3399_sdram_params *params) { unsigned char dramtype = params->base.dramtype; unsigned int ddr_freq = params->base.ddr_freq; - struct rk3399_cru *cru = dram->cru; - int channel; + u32 training_flag = PI_READ_GATE_TRAINING; + int channel, ch, rank; int ret; debug("Starting SDRAM initialization...\n"); @@ -1272,36 +1311,75 @@ static int sdram_init(struct dram_info *dram, return -E2BIG; } + for (ch = 0; ch < 2; ch++) { + params->ch[ch].cap_info.rank = 2; + for (rank = 2; rank != 0; rank--) { + ret = pctl_init(dram, params); + if (ret < 0) { + printf("%s: pctl init failed\n", __func__); + return ret; + } + + /* LPDDR2/LPDDR3 need to wait DAI complete, max 10us */ + if (dramtype == LPDDR3) + udelay(10); + + params->ch[ch].cap_info.rank = rank; + + /* + * LPDDR3 CA training msut be trigger before + * other training. + * DDR3 is not have CA training. + */ + if (params->base.dramtype == LPDDR3) + training_flag |= PI_CA_TRAINING; + + if (!(data_training(&dram->chan[ch], ch, + params, training_flag))) + break; + } + /* Computed rank with associated channel number */ + params->ch[ch].cap_info.rank = rank; + } + + params->base.num_channels = 0; for (channel = 0; channel < 2; channel++) { const struct chan_info *chan = &dram->chan[channel]; - struct rk3399_ddr_publ_regs *publ = chan->publ; - - phy_pctrl_reset(cru, channel); - phy_dll_bypass_set(publ, ddr_freq); + struct sdram_cap_info *cap_info = ¶ms->ch[channel].cap_info; + u8 training_flag = PI_FULL_TRAINING; - if (channel >= params->base.num_channels) + if (cap_info->rank == 0) { + clear_channel_params(params, channel); continue; - - ret = pctl_cfg(dram, chan, channel, params); - if (ret < 0) { - printf("%s: pctl config failed\n", __func__); - return ret; + } else { + params->base.num_channels++; } - /* start to trigger initialization */ - pctl_start(dram, channel); + debug("Channel "); + debug(channel ? "1: " : "0: "); - /* LPDDR2/LPDDR3 need to wait DAI complete, max 10us */ - if (dramtype == LPDDR3) - udelay(10); + /* LPDDR3 should have write and read gate training */ + if (params->base.dramtype == LPDDR3) + training_flag = PI_WRITE_LEVELING | + PI_READ_GATE_TRAINING; - if (data_training(chan, channel, params, PI_FULL_TRAINING)) { - printf("%s: data training failed\n", __func__); - return -EIO; + if (params->base.dramtype != LPDDR4) { + ret = data_training(dram, channel, params, + training_flag); + if (!ret) { + debug("%s: data train failed for channel %d\n", + __func__, ret); + continue; + } } - set_ddrconfig(chan, params, channel, - params->ch[channel].cap_info.ddrconfig); + set_ddrconfig(chan, params, channel, cap_info->ddrconfig); + } + + if (params->base.num_channels == 0) { + printf("%s: ", __func__); + printf(" - %dMHz failed!\n", params->base.ddr_freq); + return -EINVAL; } params->base.stride = calculate_stride(params); |