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sdram: Add MR read request

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This commit is contained in:
CTCaer
2020-04-30 03:27:39 +03:00
parent 8c762c52e2
commit ecb616e411
6 changed files with 158 additions and 3 deletions
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52
bootloader/mem/sdram.c
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@@ -49,6 +49,56 @@ static u32 _get_sdram_id()
return sdram_id;
}
static bool _sdram_wait_emc_status(u32 reg_offset, u32 bit_mask, bool updated_state, s32 emc_channel)
{
bool err = true;
for (s32 i = 0; i < EMC_STATUS_UPDATE_TIMEOUT; i++)
{
if (emc_channel)
{
if (emc_channel != 1)
goto done;
if (((EMC_CH1(reg_offset) & bit_mask) != 0) == updated_state)
{
err = false;
break;
}
}
else if (((EMC(reg_offset) & bit_mask) != 0) == updated_state)
{
err = false;
break;
}
usleep(1);
}
done:
return err;
}
static void _sdram_req_mrr_data(u32 data, bool dual_channel)
{
EMC(EMC_MRR) = data;
_sdram_wait_emc_status(EMC_EMC_STATUS, EMC_STATUS_MRR_DIVLD, true, EMC_CHAN0);
if (dual_channel)
_sdram_wait_emc_status(EMC_EMC_STATUS, EMC_STATUS_MRR_DIVLD, true, EMC_CHAN1);
}
emc_mr_data_t sdram_read_mrx(emc_mr_t mrx)
{
emc_mr_data_t data;
_sdram_req_mrr_data((1 << 31) | (mrx << 16), EMC_CHAN0);
data.dev0_ch0 = EMC(EMC_MRR) & 0xFF;
data.dev0_ch1 = (EMC(EMC_MRR) & 0xFF00 >> 8);
_sdram_req_mrr_data((1 << 30) | (mrx << 16), EMC_CHAN1);
data.dev1_ch0 = EMC(EMC_MRR) & 0xFF;
data.dev1_ch1 = (EMC(EMC_MRR) & 0xFF00 >> 8);
return data;
}
static void _sdram_config(const sdram_params_t *params)
{
// Program DPD3/DPD4 regs (coldboot path).
@@ -91,7 +141,7 @@ break_nosleep:
if (params->emc_clock_source_dll)
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_EMC_DLL) = params->emc_clock_source_dll;
if (params->clear_clock2_mc1)
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = 0x40000000;
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = 0x40000000; // Clear Reset to MC1.
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_H_SET) = 0x2000001; // Enable EMC and MEM clocks.
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_X_SET) = 0x4000; // Enable EMC_DLL clock.