913 lines
26 KiB
C
913 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <fdtdec.h>
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#include <mmc.h>
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#include <dm.h>
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#include <linux/compat.h>
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#include <linux/dma-direction.h>
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#include <linux/io.h>
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#include <linux/sizes.h>
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#include <power/regulator.h>
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#include <asm/unaligned.h>
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#include "tmio-common.h"
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#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
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CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
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CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
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/* SCC registers */
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#define RENESAS_SDHI_SCC_DTCNTL 0x800
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#define RENESAS_SDHI_SCC_DTCNTL_TAPEN BIT(0)
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#define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT 16
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#define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK 0xff
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#define RENESAS_SDHI_SCC_TAPSET 0x804
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#define RENESAS_SDHI_SCC_DT2FF 0x808
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#define RENESAS_SDHI_SCC_CKSEL 0x80c
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#define RENESAS_SDHI_SCC_CKSEL_DTSEL BIT(0)
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#define RENESAS_SDHI_SCC_RVSCNTL 0x810
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#define RENESAS_SDHI_SCC_RVSCNTL_RVSEN BIT(0)
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#define RENESAS_SDHI_SCC_RVSREQ 0x814
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#define RENESAS_SDHI_SCC_RVSREQ_RVSERR BIT(2)
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#define RENESAS_SDHI_SCC_RVSREQ_REQTAPUP BIT(1)
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#define RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN BIT(0)
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#define RENESAS_SDHI_SCC_SMPCMP 0x818
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#define RENESAS_SDHI_SCC_SMPCMP_CMD_ERR (BIT(24) | BIT(8))
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#define RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP BIT(24)
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#define RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN BIT(8)
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#define RENESAS_SDHI_SCC_TMPPORT2 0x81c
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#define RENESAS_SDHI_SCC_TMPPORT2_HS400EN BIT(31)
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#define RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL BIT(4)
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#define RENESAS_SDHI_SCC_TMPPORT3 0x828
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#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_0 3
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#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_1 2
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#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_2 1
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#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_3 0
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#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_MASK 0x3
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#define RENESAS_SDHI_SCC_TMPPORT4 0x82c
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#define RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START BIT(0)
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#define RENESAS_SDHI_SCC_TMPPORT5 0x830
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#define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R BIT(8)
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#define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W (0 << 8)
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#define RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK 0x3F
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#define RENESAS_SDHI_SCC_TMPPORT6 0x834
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#define RENESAS_SDHI_SCC_TMPPORT7 0x838
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#define RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE 0xa5000000
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#define RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK 0x1f
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#define RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE BIT(7)
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#define RENESAS_SDHI_MAX_TAP 3
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#define CALIB_TABLE_MAX (RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK + 1)
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static const u8 r8a7795_calib_table[2][CALIB_TABLE_MAX] = {
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{ 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 5, 6, 6, 7, 11,
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15, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 21 },
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{ 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 9, 10, 11, 12, 15,
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16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 22, 22 }
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};
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static const u8 r8a7796_rev1_calib_table[2][CALIB_TABLE_MAX] = {
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 9,
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15, 15, 15, 16, 16, 16, 16, 16, 17, 18, 19, 20, 21, 21, 22, 22 },
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
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2, 9, 16, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 22, 23, 24}
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};
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static const u8 r8a7796_rev3_calib_table[2][CALIB_TABLE_MAX] = {
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{ 0, 0, 0, 0, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 9, 10,
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11, 12, 13, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 23, 23 },
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{ 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12,
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13, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 24, 24 }
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};
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static const u8 r8a77965_calib_table[2][CALIB_TABLE_MAX] = {
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{ 0, 1, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
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16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 29 },
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{ 0, 1, 2, 2, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15,
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16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 31 }
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};
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static const u8 r8a77990_calib_table[2][CALIB_TABLE_MAX] = {
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
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{ 0, 0, 1, 2, 3, 4, 4, 4, 4, 5, 5, 6, 7, 8, 10, 11,
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12, 13, 14, 16, 17, 18, 18, 18, 19, 19, 20, 24, 26, 26, 26, 26 }
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};
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static int rmobile_is_gen3_mmc0(struct tmio_sd_priv *priv)
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{
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/* On R-Car Gen3, MMC0 is at 0xee140000 */
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return (uintptr_t)(priv->regbase) == 0xee140000;
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}
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static u32 sd_scc_tmpport_read32(struct tmio_sd_priv *priv, u32 addr)
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{
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/* read mode */
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tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R |
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(RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr),
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RENESAS_SDHI_SCC_TMPPORT5);
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/* access start and stop */
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tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START,
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RENESAS_SDHI_SCC_TMPPORT4);
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tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4);
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return tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT7);
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}
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static void sd_scc_tmpport_write32(struct tmio_sd_priv *priv, u32 addr, u32 val)
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{
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/* write mode */
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tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W |
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(RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr),
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RENESAS_SDHI_SCC_TMPPORT5);
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tmio_sd_writel(priv, val, RENESAS_SDHI_SCC_TMPPORT6);
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/* access start and stop */
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tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START,
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RENESAS_SDHI_SCC_TMPPORT4);
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tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4);
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}
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static bool renesas_sdhi_check_scc_error(struct udevice *dev)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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struct mmc *mmc = mmc_get_mmc_dev(dev);
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unsigned long new_tap = priv->tap_set;
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unsigned long error_tap = priv->tap_set;
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u32 reg, smpcmp;
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if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) &&
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(mmc->selected_mode != UHS_SDR104) &&
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(mmc->selected_mode != MMC_HS_200) &&
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(mmc->selected_mode != MMC_HS_400) &&
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(priv->nrtaps != 4))
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return false;
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
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/* Handle automatic tuning correction */
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if (reg & RENESAS_SDHI_SCC_RVSCNTL_RVSEN) {
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ);
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if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR) {
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tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
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return true;
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}
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return false;
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}
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/* Handle manual tuning correction */
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ);
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if (!reg) /* No error */
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return false;
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tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
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if (mmc->selected_mode == MMC_HS_400) {
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/*
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* Correction Error Status contains CMD and DAT signal status.
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* In HS400, DAT signal based on DS signal, not CLK.
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* Therefore, use only CMD status.
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*/
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smpcmp = tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP) &
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RENESAS_SDHI_SCC_SMPCMP_CMD_ERR;
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switch (smpcmp) {
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case 0:
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return false; /* No error in CMD signal */
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case RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP:
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new_tap = (priv->tap_set +
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priv->tap_num + 1) % priv->tap_num;
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error_tap = (priv->tap_set +
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priv->tap_num - 1) % priv->tap_num;
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break;
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case RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN:
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new_tap = (priv->tap_set +
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priv->tap_num - 1) % priv->tap_num;
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error_tap = (priv->tap_set +
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priv->tap_num + 1) % priv->tap_num;
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break;
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default:
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return true; /* Need re-tune */
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}
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if (priv->hs400_bad_tap & BIT(new_tap)) {
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/*
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* New tap is bad tap (cannot change).
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* Compare with HS200 tuning result.
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* In HS200 tuning, when smpcmp[error_tap]
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* is OK, retune is executed.
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*/
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if (priv->smpcmp & BIT(error_tap))
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return true; /* Need retune */
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return false; /* cannot change */
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}
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priv->tap_set = new_tap;
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} else {
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if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR)
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return true; /* Need re-tune */
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else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPUP)
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priv->tap_set = (priv->tap_set +
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priv->tap_num + 1) % priv->tap_num;
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else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN)
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priv->tap_set = (priv->tap_set +
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priv->tap_num - 1) % priv->tap_num;
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else
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return false;
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}
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/* Set TAP position */
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tmio_sd_writel(priv, priv->tap_set >> ((priv->nrtaps == 4) ? 1 : 0),
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RENESAS_SDHI_SCC_TAPSET);
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return false;
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}
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static void renesas_sdhi_adjust_hs400_mode_enable(struct tmio_sd_priv *priv)
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{
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u32 calib_code;
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if (!priv->adjust_hs400_enable)
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return;
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if (!priv->needs_adjust_hs400)
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return;
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if (!priv->adjust_hs400_calib_table)
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return;
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/*
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* Enabled Manual adjust HS400 mode
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*
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* 1) Disabled Write Protect
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* W(addr=0x00, WP_DISABLE_CODE)
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*
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* 2) Read Calibration code
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* read_value = R(addr=0x26)
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* 3) Refer to calibration table
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* Calibration code = table[read_value]
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* 4) Enabled Manual Calibration
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* W(addr=0x22, manual mode | Calibration code)
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* 5) Set Offset value to TMPPORT3 Reg
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*/
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sd_scc_tmpport_write32(priv, 0x00,
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RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE);
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calib_code = sd_scc_tmpport_read32(priv, 0x26);
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calib_code &= RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK;
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sd_scc_tmpport_write32(priv, 0x22,
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RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE |
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priv->adjust_hs400_calib_table[calib_code]);
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tmio_sd_writel(priv, priv->adjust_hs400_offset,
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RENESAS_SDHI_SCC_TMPPORT3);
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/* Clear flag */
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priv->needs_adjust_hs400 = false;
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}
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static void renesas_sdhi_adjust_hs400_mode_disable(struct tmio_sd_priv *priv)
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{
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/* Disabled Manual adjust HS400 mode
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*
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* 1) Disabled Write Protect
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* W(addr=0x00, WP_DISABLE_CODE)
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* 2) Disabled Manual Calibration
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* W(addr=0x22, 0)
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* 3) Clear offset value to TMPPORT3 Reg
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*/
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sd_scc_tmpport_write32(priv, 0x00,
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RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE);
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sd_scc_tmpport_write32(priv, 0x22, 0);
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tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT3);
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}
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static unsigned int renesas_sdhi_init_tuning(struct tmio_sd_priv *priv)
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{
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u32 reg;
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/* Initialize SCC */
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tmio_sd_writel(priv, 0, TMIO_SD_INFO1);
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reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
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reg &= ~TMIO_SD_CLKCTL_SCLKEN;
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tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
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/* Set sampling clock selection range */
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tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) |
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RENESAS_SDHI_SCC_DTCNTL_TAPEN,
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RENESAS_SDHI_SCC_DTCNTL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
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reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL;
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
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reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
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tmio_sd_writel(priv, 0x300 /* scc_tappos */,
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RENESAS_SDHI_SCC_DT2FF);
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reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
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reg |= TMIO_SD_CLKCTL_SCLKEN;
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tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
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/* Read TAPNUM */
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return (tmio_sd_readl(priv, RENESAS_SDHI_SCC_DTCNTL) >>
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RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) &
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RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK;
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}
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static void renesas_sdhi_reset_tuning(struct tmio_sd_priv *priv)
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{
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u32 reg;
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/* Reset SCC */
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reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
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reg &= ~TMIO_SD_CLKCTL_SCLKEN;
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tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
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reg &= ~RENESAS_SDHI_SCC_CKSEL_DTSEL;
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2);
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reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
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RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL);
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2);
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/* Disable HS400 mode adjustment */
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renesas_sdhi_adjust_hs400_mode_disable(priv);
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reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
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reg |= TMIO_SD_CLKCTL_SCLKEN;
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tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
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reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
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reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
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tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
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}
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static int renesas_sdhi_hs400(struct udevice *dev)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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struct mmc *mmc = mmc_get_mmc_dev(dev);
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bool hs400 = (mmc->selected_mode == MMC_HS_400);
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int ret, taps = hs400 ? priv->nrtaps : 8;
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unsigned long new_tap;
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u32 reg;
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if (taps == 4) /* HS400 on 4tap SoC needs different clock */
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ret = clk_set_rate(&priv->clk, 400000000);
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else
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ret = clk_set_rate(&priv->clk, 200000000);
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if (ret < 0)
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return ret;
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reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
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|
reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
|
|
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
|
|
|
|
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2);
|
|
if (hs400) {
|
|
reg |= RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
|
|
RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL;
|
|
} else {
|
|
reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
|
|
RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL);
|
|
}
|
|
|
|
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2);
|
|
|
|
/* Disable HS400 mode adjustment */
|
|
if (!hs400)
|
|
renesas_sdhi_adjust_hs400_mode_disable(priv);
|
|
|
|
tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) |
|
|
RENESAS_SDHI_SCC_DTCNTL_TAPEN,
|
|
RENESAS_SDHI_SCC_DTCNTL);
|
|
|
|
/* Avoid bad TAP */
|
|
if (priv->hs400_bad_tap & BIT(priv->tap_set)) {
|
|
new_tap = (priv->tap_set +
|
|
priv->tap_num + 1) % priv->tap_num;
|
|
|
|
if (priv->hs400_bad_tap & BIT(new_tap))
|
|
new_tap = (priv->tap_set +
|
|
priv->tap_num - 1) % priv->tap_num;
|
|
|
|
if (priv->hs400_bad_tap & BIT(new_tap)) {
|
|
new_tap = priv->tap_set;
|
|
debug("Three consecutive bad tap is prohibited\n");
|
|
}
|
|
|
|
priv->tap_set = new_tap;
|
|
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
|
|
}
|
|
|
|
if (taps == 4) {
|
|
tmio_sd_writel(priv, priv->tap_set >> 1,
|
|
RENESAS_SDHI_SCC_TAPSET);
|
|
tmio_sd_writel(priv, hs400 ? 0x100 : 0x300,
|
|
RENESAS_SDHI_SCC_DT2FF);
|
|
} else {
|
|
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
|
|
tmio_sd_writel(priv, 0x300, RENESAS_SDHI_SCC_DT2FF);
|
|
}
|
|
|
|
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
|
|
reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL;
|
|
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
|
|
|
|
/* Execute adjust hs400 offset after setting to HS400 mode */
|
|
if (hs400)
|
|
priv->needs_adjust_hs400 = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void renesas_sdhi_prepare_tuning(struct tmio_sd_priv *priv,
|
|
unsigned long tap)
|
|
{
|
|
/* Set sampling clock position */
|
|
tmio_sd_writel(priv, tap, RENESAS_SDHI_SCC_TAPSET);
|
|
}
|
|
|
|
static unsigned int renesas_sdhi_compare_scc_data(struct tmio_sd_priv *priv)
|
|
{
|
|
/* Get comparison of sampling data */
|
|
return tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP);
|
|
}
|
|
|
|
static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv,
|
|
unsigned int taps)
|
|
{
|
|
unsigned long tap_cnt; /* counter of tuning success */
|
|
unsigned long tap_start;/* start position of tuning success */
|
|
unsigned long tap_end; /* end position of tuning success */
|
|
unsigned long ntap; /* temporary counter of tuning success */
|
|
unsigned long match_cnt;/* counter of matching data */
|
|
unsigned long i;
|
|
bool select = false;
|
|
u32 reg;
|
|
|
|
priv->needs_adjust_hs400 = false;
|
|
|
|
/* Clear SCC_RVSREQ */
|
|
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
|
|
|
|
/* Merge the results */
|
|
for (i = 0; i < priv->tap_num * 2; i++) {
|
|
if (!(taps & BIT(i))) {
|
|
taps &= ~BIT(i % priv->tap_num);
|
|
taps &= ~BIT((i % priv->tap_num) + priv->tap_num);
|
|
}
|
|
if (!(priv->smpcmp & BIT(i))) {
|
|
priv->smpcmp &= ~BIT(i % priv->tap_num);
|
|
priv->smpcmp &= ~BIT((i % priv->tap_num) + priv->tap_num);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find the longest consecutive run of successful probes. If that
|
|
* is more than RENESAS_SDHI_MAX_TAP probes long then use the
|
|
* center index as the tap.
|
|
*/
|
|
tap_cnt = 0;
|
|
ntap = 0;
|
|
tap_start = 0;
|
|
tap_end = 0;
|
|
for (i = 0; i < priv->tap_num * 2; i++) {
|
|
if (taps & BIT(i))
|
|
ntap++;
|
|
else {
|
|
if (ntap > tap_cnt) {
|
|
tap_start = i - ntap;
|
|
tap_end = i - 1;
|
|
tap_cnt = ntap;
|
|
}
|
|
ntap = 0;
|
|
}
|
|
}
|
|
|
|
if (ntap > tap_cnt) {
|
|
tap_start = i - ntap;
|
|
tap_end = i - 1;
|
|
tap_cnt = ntap;
|
|
}
|
|
|
|
/*
|
|
* If all of the TAP is OK, the sampling clock position is selected by
|
|
* identifying the change point of data.
|
|
*/
|
|
if (tap_cnt == priv->tap_num * 2) {
|
|
match_cnt = 0;
|
|
ntap = 0;
|
|
tap_start = 0;
|
|
tap_end = 0;
|
|
for (i = 0; i < priv->tap_num * 2; i++) {
|
|
if (priv->smpcmp & BIT(i))
|
|
ntap++;
|
|
else {
|
|
if (ntap > match_cnt) {
|
|
tap_start = i - ntap;
|
|
tap_end = i - 1;
|
|
match_cnt = ntap;
|
|
}
|
|
ntap = 0;
|
|
}
|
|
}
|
|
if (ntap > match_cnt) {
|
|
tap_start = i - ntap;
|
|
tap_end = i - 1;
|
|
match_cnt = ntap;
|
|
}
|
|
if (match_cnt)
|
|
select = true;
|
|
} else if (tap_cnt >= RENESAS_SDHI_MAX_TAP)
|
|
select = true;
|
|
|
|
if (select)
|
|
priv->tap_set = ((tap_start + tap_end) / 2) % priv->tap_num;
|
|
else
|
|
return -EIO;
|
|
|
|
/* Set SCC */
|
|
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
|
|
|
|
/* Enable auto re-tuning */
|
|
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
|
|
reg |= RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
|
|
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
|
|
struct mmc *mmc = upriv->mmc;
|
|
unsigned int tap_num;
|
|
unsigned int taps = 0;
|
|
int i, ret = 0;
|
|
u32 caps;
|
|
|
|
/* Only supported on Renesas RCar */
|
|
if (!(priv->caps & TMIO_SD_CAP_RCAR_UHS))
|
|
return -EINVAL;
|
|
|
|
/* clock tuning is not needed for upto 52MHz */
|
|
if (!((mmc->selected_mode == MMC_HS_200) ||
|
|
(mmc->selected_mode == MMC_HS_400) ||
|
|
(mmc->selected_mode == UHS_SDR104) ||
|
|
(mmc->selected_mode == UHS_SDR50)))
|
|
return 0;
|
|
|
|
tap_num = renesas_sdhi_init_tuning(priv);
|
|
if (!tap_num)
|
|
/* Tuning is not supported */
|
|
goto out;
|
|
|
|
priv->tap_num = tap_num;
|
|
|
|
if (priv->tap_num * 2 >= sizeof(taps) * 8) {
|
|
dev_err(dev,
|
|
"Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
|
|
goto out;
|
|
}
|
|
|
|
priv->smpcmp = 0;
|
|
|
|
/* Issue CMD19 twice for each tap */
|
|
for (i = 0; i < 2 * priv->tap_num; i++) {
|
|
renesas_sdhi_prepare_tuning(priv, i % priv->tap_num);
|
|
|
|
/* Force PIO for the tuning */
|
|
caps = priv->caps;
|
|
priv->caps &= ~TMIO_SD_CAP_DMA_INTERNAL;
|
|
|
|
ret = mmc_send_tuning(mmc, opcode, NULL);
|
|
|
|
priv->caps = caps;
|
|
|
|
if (ret == 0)
|
|
taps |= BIT(i);
|
|
|
|
ret = renesas_sdhi_compare_scc_data(priv);
|
|
if (ret == 0)
|
|
priv->smpcmp |= BIT(i);
|
|
|
|
mdelay(1);
|
|
}
|
|
|
|
ret = renesas_sdhi_select_tuning(priv, taps);
|
|
|
|
out:
|
|
if (ret < 0) {
|
|
dev_warn(dev, "Tuning procedure failed\n");
|
|
renesas_sdhi_reset_tuning(priv);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#else
|
|
static int renesas_sdhi_hs400(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int renesas_sdhi_set_ios(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
u32 tmp;
|
|
int ret;
|
|
|
|
/* Stop the clock before changing its rate to avoid a glitch signal */
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
|
|
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
|
|
|
|
ret = renesas_sdhi_hs400(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = tmio_sd_set_ios(dev);
|
|
|
|
mdelay(10);
|
|
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) &&
|
|
(mmc->selected_mode != UHS_SDR104) &&
|
|
(mmc->selected_mode != MMC_HS_200) &&
|
|
(mmc->selected_mode != MMC_HS_400)) {
|
|
renesas_sdhi_reset_tuning(priv);
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
|
|
static int renesas_sdhi_wait_dat0(struct udevice *dev, int state,
|
|
int timeout_us)
|
|
{
|
|
int ret = -ETIMEDOUT;
|
|
bool dat0_high;
|
|
bool target_dat0_high = !!state;
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
|
|
timeout_us = DIV_ROUND_UP(timeout_us, 10); /* check every 10 us. */
|
|
while (timeout_us--) {
|
|
dat0_high = !!(tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_DAT0);
|
|
if (dat0_high == target_dat0_high) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
udelay(10);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int renesas_sdhi_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
|
|
struct mmc_data *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = tmio_sd_send_cmd(dev, cmd, data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
|
|
renesas_sdhi_check_scc_error(dev);
|
|
|
|
if (cmd->cmdidx == MMC_CMD_SEND_STATUS)
|
|
renesas_sdhi_adjust_hs400_mode_enable(priv);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_mmc_ops renesas_sdhi_ops = {
|
|
.send_cmd = renesas_sdhi_send_cmd,
|
|
.set_ios = renesas_sdhi_set_ios,
|
|
.get_cd = tmio_sd_get_cd,
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
|
|
.execute_tuning = renesas_sdhi_execute_tuning,
|
|
#endif
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
|
|
.wait_dat0 = renesas_sdhi_wait_dat0,
|
|
#endif
|
|
};
|
|
|
|
#define RENESAS_GEN2_QUIRKS TMIO_SD_CAP_RCAR_GEN2
|
|
#define RENESAS_GEN3_QUIRKS \
|
|
TMIO_SD_CAP_64BIT | TMIO_SD_CAP_RCAR_GEN3 | TMIO_SD_CAP_RCAR_UHS
|
|
|
|
static const struct udevice_id renesas_sdhi_match[] = {
|
|
{ .compatible = "renesas,sdhi-r8a7790", .data = RENESAS_GEN2_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7791", .data = RENESAS_GEN2_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7792", .data = RENESAS_GEN2_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7793", .data = RENESAS_GEN2_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7794", .data = RENESAS_GEN2_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7795", .data = RENESAS_GEN3_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a7796", .data = RENESAS_GEN3_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a77965", .data = RENESAS_GEN3_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a77970", .data = RENESAS_GEN3_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a77990", .data = RENESAS_GEN3_QUIRKS },
|
|
{ .compatible = "renesas,sdhi-r8a77995", .data = RENESAS_GEN3_QUIRKS },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static ulong renesas_sdhi_clk_get_rate(struct tmio_sd_priv *priv)
|
|
{
|
|
return clk_get_rate(&priv->clk);
|
|
}
|
|
|
|
static void renesas_sdhi_filter_caps(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
|
|
if (!(priv->caps & TMIO_SD_CAP_RCAR_GEN3))
|
|
return;
|
|
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
|
|
struct tmio_sd_plat *plat = dev_get_platdata(dev);
|
|
|
|
/* HS400 is not supported on H3 ES1.x and M3W ES1.0, ES1.1 */
|
|
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
|
|
(rmobile_get_cpu_rev_integer() <= 1)) ||
|
|
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() < 2)))
|
|
plat->cfg.host_caps &= ~MMC_MODE_HS400;
|
|
|
|
/* H3 ES2.0, ES3.0 and M3W ES1.2 and M3N bad taps */
|
|
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
|
|
(rmobile_get_cpu_rev_integer() >= 2)) ||
|
|
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() == 2)) ||
|
|
(rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965))
|
|
priv->hs400_bad_tap = BIT(2) | BIT(3) | BIT(6) | BIT(7);
|
|
|
|
/* H3 ES3.0 can use HS400 with manual adjustment */
|
|
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
|
|
(rmobile_get_cpu_rev_integer() >= 3)) {
|
|
priv->adjust_hs400_enable = true;
|
|
priv->adjust_hs400_offset = 0;
|
|
priv->adjust_hs400_calib_table =
|
|
r8a7795_calib_table[!rmobile_is_gen3_mmc0(priv)];
|
|
}
|
|
|
|
/* M3W ES1.2 can use HS400 with manual adjustment */
|
|
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() == 2)) {
|
|
priv->adjust_hs400_enable = true;
|
|
priv->adjust_hs400_offset = 3;
|
|
priv->adjust_hs400_calib_table =
|
|
r8a7796_rev1_calib_table[!rmobile_is_gen3_mmc0(priv)];
|
|
}
|
|
|
|
/* M3W ES1.x for x>2 can use HS400 with manual adjustment and taps */
|
|
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() > 2)) {
|
|
priv->adjust_hs400_enable = true;
|
|
priv->adjust_hs400_offset = 0;
|
|
priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7);
|
|
priv->adjust_hs400_calib_table =
|
|
r8a7796_rev3_calib_table[!rmobile_is_gen3_mmc0(priv)];
|
|
}
|
|
|
|
/* M3N can use HS400 with manual adjustment */
|
|
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965) {
|
|
priv->adjust_hs400_enable = true;
|
|
priv->adjust_hs400_offset = 3;
|
|
priv->adjust_hs400_calib_table =
|
|
r8a77965_calib_table[!rmobile_is_gen3_mmc0(priv)];
|
|
}
|
|
|
|
/* E3 can use HS400 with manual adjustment */
|
|
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77990) {
|
|
priv->adjust_hs400_enable = true;
|
|
priv->adjust_hs400_offset = 3;
|
|
priv->adjust_hs400_calib_table =
|
|
r8a77990_calib_table[!rmobile_is_gen3_mmc0(priv)];
|
|
}
|
|
|
|
/* H3 ES1.x, ES2.0 and M3W ES1.0, ES1.1, ES1.2 uses 4 tuning taps */
|
|
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
|
|
(rmobile_get_cpu_rev_integer() <= 2)) ||
|
|
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() <= 2)))
|
|
priv->nrtaps = 4;
|
|
else
|
|
priv->nrtaps = 8;
|
|
#endif
|
|
/* H3 ES1.x and M3W ES1.0 uses bit 17 for DTRAEND */
|
|
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
|
|
(rmobile_get_cpu_rev_integer() <= 1)) ||
|
|
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
|
|
(rmobile_get_cpu_rev_integer() == 1) &&
|
|
(rmobile_get_cpu_rev_fraction() == 0)))
|
|
priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD;
|
|
else
|
|
priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD2;
|
|
}
|
|
|
|
static int renesas_sdhi_probe(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
u32 quirks = dev_get_driver_data(dev);
|
|
struct fdt_resource reg_res;
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
int ret;
|
|
|
|
priv->clk_get_rate = renesas_sdhi_clk_get_rate;
|
|
|
|
if (quirks == RENESAS_GEN2_QUIRKS) {
|
|
ret = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev),
|
|
"reg", 0, ®_res);
|
|
if (ret < 0) {
|
|
dev_err(dev, "\"reg\" resource not found, ret=%i\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
if (fdt_resource_size(®_res) == 0x100)
|
|
quirks |= TMIO_SD_CAP_16BIT;
|
|
}
|
|
|
|
ret = clk_get_by_index(dev, 0, &priv->clk);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to get host clock\n");
|
|
return ret;
|
|
}
|
|
|
|
/* set to max rate */
|
|
ret = clk_set_rate(&priv->clk, 200000000);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to set rate for host clock\n");
|
|
clk_free(&priv->clk);
|
|
return ret;
|
|
}
|
|
|
|
ret = clk_enable(&priv->clk);
|
|
if (ret) {
|
|
dev_err(dev, "failed to enable host clock\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = tmio_sd_probe(dev, quirks);
|
|
|
|
renesas_sdhi_filter_caps(dev);
|
|
|
|
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
|
|
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
|
|
if (!ret && (priv->caps & TMIO_SD_CAP_RCAR_UHS))
|
|
renesas_sdhi_reset_tuning(priv);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
U_BOOT_DRIVER(renesas_sdhi) = {
|
|
.name = "renesas-sdhi",
|
|
.id = UCLASS_MMC,
|
|
.of_match = renesas_sdhi_match,
|
|
.bind = tmio_sd_bind,
|
|
.probe = renesas_sdhi_probe,
|
|
.priv_auto_alloc_size = sizeof(struct tmio_sd_priv),
|
|
.platdata_auto_alloc_size = sizeof(struct tmio_sd_plat),
|
|
.ops = &renesas_sdhi_ops,
|
|
};
|