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bdk: minerva: add emc src div disable

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This commit is contained in:
CTCaer 2024-06-02 06:46:28 +03:00
parent 93296c2c38
commit 14706cef4e
3 changed files with 38 additions and 1 deletions
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3
bdk/mem/emc.h
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@ -2,7 +2,7 @@
* arch/arm/mach-tegra/tegra21_emc.h
*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2019-2020, CTCaer.
* Copyright (c) 2019-2024, CTCaer.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -23,6 +23,7 @@
#ifndef _EMC_H_
#define _EMC_H_
#define EMC_INTSTATUS 0x0
#define EMC_DBG 0x8
#define EMC_CFG 0xC
#define EMC_CONFIG_SAMPLE_DELAY 0x5f0

35
bdk/mem/sdram.c
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@ -184,6 +184,41 @@ emc_mr_data_t sdram_read_mrx(emc_mr_t mrx)
return data;
}
void sdram_div_disable(bool enable)
{
static bool enabled = false;
if (hw_get_chip_id() == GP_HIDREV_MAJOR_T210 && enable == enabled)
return;
enabled = enable;
// Clear CC interrupt.
EMC(EMC_INTSTATUS) = BIT(4);
(void)EMC(EMC_INTSTATUS);
u32 clk_src_emc = _dram_cfg_08_10_12_14_samsung_hynix_4gb.emc_clock_source;
if (enable)
{
// Check if clock source is not the expected one.
if (CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_EMC) != clk_src_emc)
return;
// Clear div.
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_EMC) = clk_src_emc & ~0xF;
}
else
{
// Restore MC/EMC clock.
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_EMC) = clk_src_emc;
}
// Wait for CC interrupt.
while (!(EMC(EMC_INTSTATUS) & BIT(4)))
;
}
static void _sdram_config_t210(const sdram_params_t210_t *params)
{
// Program DPD3/DPD4 regs (coldboot path).

1
bdk/mem/sdram.h
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@ -135,6 +135,7 @@ void sdram_init();
void *sdram_get_params_patched();
void *sdram_get_params_t210b01();
void sdram_lp0_save_params(const void *params);
void sdram_div_disable(bool enable);
emc_mr_data_t sdram_read_mrx(emc_mr_t mrx);
#endif