/** @file
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*
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* Copyright (c) 2017, Andrei Warkentin <andrey.warkentin@gmail.com>
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include "RockchipSdhci.h"
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#include <Library/PcdLib.h>
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#define GRF_BASE 0xFDC60000
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#define NS_CRU_BASE 0xFDD20000
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#define CRU_CLKSEL_CON28 0x0170
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#define EMMC_CLOCK_BASE (NS_CRU_BASE + CRU_CLKSEL_CON28)
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#define EMMC_CLOCK_SEL(a) (((7 << 12) << 16) | (a << 12))
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#define EMMCPHY_BASE PcdGet32 (PcdSdhciDxeBaseAddress)
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#define DWCMSHC_HOST_CTRL3 (EMMC_BASE + 0x508)
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#define EMMC_DLL_CTRL (EMMC_BASE + 0x800)
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#define EMMC_DLL_RXCLK (EMMC_BASE + 0x804)
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#define EMMC_DLL_TXCLK (EMMC_BASE + 0x808)
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#define EMMC_DLL_STRBIN (EMMC_BASE + 0x80C)
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#define EMMC_DLL_STATUS0 (EMMC_BASE + 0x840)
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#define EMMC_DLL_STATUS1 (EMMC_BASE + 0x844)
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EFI_STATUS SdhciSetPHY(
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IN UINTN Clock
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)
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{
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UINT32 Tmp;
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/* Disable cmd conflict check */
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Tmp = MmioRead32(DWCMSHC_HOST_CTRL3);
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Tmp &= ~BIT0;
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MmioWrite32(EMMCPHY_BASE + DWCMSHC_HOST_CTRL3, Tmp);
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if (Clock < 100000000) {
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MmioWrite32(EMMC_DLL_CTRL, 0);
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MmioWrite32(EMMC_DLL_RXCLK, 1<<29); /* PIO mode need set bit 29*/
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MmioWrite32(EMMC_DLL_TXCLK, 0);
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MmioWrite32(EMMC_DLL_STRBIN, 0);
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return EFI_SUCCESS;
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}
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else {
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return RETURN_UNSUPPORTED;
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}
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return EFI_SUCCESS;
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}
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EFI_STATUS
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EFIAPI
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SdhciGetClockRate(
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IN UINTN TargetFreq,
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OUT UINTN *BaseFreq
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)
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{
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UINT32 CClkEmmcSel;
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if (TargetFreq == 0 || BaseFreq == NULL)
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return -1;
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if (TargetFreq >= 200000000) {
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CClkEmmcSel = 1;
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} else if (TargetFreq >= 150000000) {
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CClkEmmcSel = 2;
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} else if (TargetFreq >= 100000000) {
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CClkEmmcSel = 3;
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} else if (TargetFreq >= 50000000) {
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CClkEmmcSel = 4;
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} else if (TargetFreq >= 24000000) {
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CClkEmmcSel = 0;
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} else {
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CClkEmmcSel = 5; /* 375KHZ */
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}
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SdhciSetPHY(TargetFreq);
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*BaseFreq= TargetFreq;
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DEBUG ((DEBUG_BLKIO, "MMCHost: Clock: %d\n", TargetFreq));
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MmioWrite32(EMMC_CLOCK_BASE, EMMC_CLOCK_SEL(CClkEmmcSel));
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DEBUG ((DEBUG_BLKIO, "EMMC_CLOCK 0x%x: 0x%x:\n", EMMC_CLOCK_BASE, MmioRead32(EMMC_CLOCK_BASE)));
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//DEBUG ((DEBUG_BLKIO, "GPIO1B_IOMUX_H: 0x%x:\n", MmioRead32(GRF_BASE+0x0C)));
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//DEBUG ((DEBUG_BLKIO, "GPIO1C_IOMUX_L: 0x%x:\n", MmioRead32(GRF_BASE+0x10)));
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//DEBUG ((DEBUG_BLKIO, "GPIO1C_IOMUX_H: 0x%x:\n", MmioRead32(GRF_BASE+0x14)));
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//DEBUG ((DEBUG_BLKIO, "EMMC_DLL_CTRL: 0x%x:\n", MmioRead32(EMMC_DLL_CTRL)));
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//DEBUG ((DEBUG_BLKIO, "EMMC_DLL_RXCLK: 0x%x:\n", MmioRead32(EMMC_DLL_RXCLK)));
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//DEBUG ((DEBUG_BLKIO, "EMMC_DLL_TXCLK: 0x%x:\n", MmioRead32(EMMC_DLL_TXCLK)));
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return EFI_SUCCESS;
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}
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