-#ifdef MMC_SUPPORTS_TUNING
-static int esdhc_change_pinstate(struct udevice *dev)
-{
- struct fsl_esdhc_priv *priv = dev_get_priv(dev);
- int ret;
-
- switch (priv->mode) {
- case UHS_SDR50:
- case UHS_DDR50:
- ret = pinctrl_select_state(dev, "state_100mhz");
- break;
- case UHS_SDR104:
- case MMC_HS_200:
- case MMC_HS_400:
- ret = pinctrl_select_state(dev, "state_200mhz");
- break;
- default:
- ret = pinctrl_select_state(dev, "default");
- break;
- }
-
- if (ret)
- printf("%s %d error\n", __func__, priv->mode);
-
- return ret;
-}
-
-static void esdhc_reset_tuning(struct mmc *mmc)
-{
- struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
-
- if (priv->flags & ESDHC_FLAG_USDHC) {
- if (priv->flags & ESDHC_FLAG_STD_TUNING) {
- esdhc_clrbits32(®s->autoc12err,
- MIX_CTRL_SMPCLK_SEL |
- MIX_CTRL_EXE_TUNE);
- }
- }
-}
-
-static void esdhc_set_strobe_dll(struct mmc *mmc)
-{
- struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
- u32 val;
-
- if (priv->clock > ESDHC_STROBE_DLL_CLK_FREQ) {
- writel(ESDHC_STROBE_DLL_CTRL_RESET, ®s->strobe_dllctrl);
-
- /*
- * enable strobe dll ctrl and adjust the delay target
- * for the uSDHC loopback read clock
- */
- val = ESDHC_STROBE_DLL_CTRL_ENABLE |
- (priv->strobe_dll_delay_target <<
- ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
- writel(val, ®s->strobe_dllctrl);
- /* wait 1us to make sure strobe dll status register stable */
- mdelay(1);
- val = readl(®s->strobe_dllstat);
- if (!(val & ESDHC_STROBE_DLL_STS_REF_LOCK))
- pr_warn("HS400 strobe DLL status REF not lock!\n");
- if (!(val & ESDHC_STROBE_DLL_STS_SLV_LOCK))
- pr_warn("HS400 strobe DLL status SLV not lock!\n");
- }
-}
-
-static int esdhc_set_timing(struct mmc *mmc)
-{
- struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
- u32 mixctrl;
-
- mixctrl = readl(®s->mixctrl);
- mixctrl &= ~(MIX_CTRL_DDREN | MIX_CTRL_HS400_EN);
-
- switch (mmc->selected_mode) {
- case MMC_LEGACY:
- case SD_LEGACY:
- esdhc_reset_tuning(mmc);
- writel(mixctrl, ®s->mixctrl);
- break;
- case MMC_HS_400:
- mixctrl |= MIX_CTRL_DDREN | MIX_CTRL_HS400_EN;
- writel(mixctrl, ®s->mixctrl);
- esdhc_set_strobe_dll(mmc);
- break;
- case MMC_HS:
- case MMC_HS_52:
- case MMC_HS_200:
- case SD_HS:
- case UHS_SDR12:
- case UHS_SDR25:
- case UHS_SDR50:
- case UHS_SDR104:
- writel(mixctrl, ®s->mixctrl);
- break;
- case UHS_DDR50:
- case MMC_DDR_52:
- mixctrl |= MIX_CTRL_DDREN;
- writel(mixctrl, ®s->mixctrl);
- break;
- default:
- printf("Not supported %d\n", mmc->selected_mode);
- return -EINVAL;
- }
-
- priv->mode = mmc->selected_mode;
-
- return esdhc_change_pinstate(mmc->dev);
-}
-
-static int esdhc_set_voltage(struct mmc *mmc)
-{
- struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
- int ret;
-
- priv->signal_voltage = mmc->signal_voltage;
- switch (mmc->signal_voltage) {
- case MMC_SIGNAL_VOLTAGE_330:
- if (priv->vs18_enable)
- return -EIO;
-#if CONFIG_IS_ENABLED(DM_REGULATOR)
- if (!IS_ERR_OR_NULL(priv->vqmmc_dev)) {
- ret = regulator_set_value(priv->vqmmc_dev, 3300000);
- if (ret) {
- printf("Setting to 3.3V error");
- return -EIO;
- }
- /* Wait for 5ms */
- mdelay(5);
- }
-#endif
-
- esdhc_clrbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
- if (!(esdhc_read32(®s->vendorspec) &
- ESDHC_VENDORSPEC_VSELECT))
- return 0;
-
- return -EAGAIN;
- case MMC_SIGNAL_VOLTAGE_180:
-#if CONFIG_IS_ENABLED(DM_REGULATOR)
- if (!IS_ERR_OR_NULL(priv->vqmmc_dev)) {
- ret = regulator_set_value(priv->vqmmc_dev, 1800000);
- if (ret) {
- printf("Setting to 1.8V error");
- return -EIO;
- }
- }
-#endif
- esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
- if (esdhc_read32(®s->vendorspec) & ESDHC_VENDORSPEC_VSELECT)
- return 0;
-
- return -EAGAIN;
- case MMC_SIGNAL_VOLTAGE_120:
- return -ENOTSUPP;
- default:
- return 0;
- }
-}
-
-static void esdhc_stop_tuning(struct mmc *mmc)
-{
- struct mmc_cmd cmd;
-
- cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
- cmd.cmdarg = 0;
- cmd.resp_type = MMC_RSP_R1b;
-
- dm_mmc_send_cmd(mmc->dev, &cmd, NULL);
-}
-
-static int fsl_esdhc_execute_tuning(struct udevice *dev, uint32_t opcode)
-{
- struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
- struct fsl_esdhc_priv *priv = dev_get_priv(dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
- struct mmc *mmc = &plat->mmc;
- u32 irqstaten = readl(®s->irqstaten);
- u32 irqsigen = readl(®s->irqsigen);
- int i, ret = -ETIMEDOUT;
- u32 val, mixctrl;
-
- /* clock tuning is not needed for upto 52MHz */
- if (mmc->clock <= 52000000)
- return 0;
-
- /* This is readw/writew SDHCI_HOST_CONTROL2 when tuning */
- if (priv->flags & ESDHC_FLAG_STD_TUNING) {
- val = readl(®s->autoc12err);
- mixctrl = readl(®s->mixctrl);
- val &= ~MIX_CTRL_SMPCLK_SEL;
- mixctrl &= ~(MIX_CTRL_FBCLK_SEL | MIX_CTRL_AUTO_TUNE_EN);
-
- val |= MIX_CTRL_EXE_TUNE;
- mixctrl |= MIX_CTRL_FBCLK_SEL | MIX_CTRL_AUTO_TUNE_EN;
-
- writel(val, ®s->autoc12err);
- writel(mixctrl, ®s->mixctrl);
- }
-
- /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); */
- mixctrl = readl(®s->mixctrl);
- mixctrl = MIX_CTRL_DTDSEL_READ | (mixctrl & ~MIX_CTRL_SDHCI_MASK);
- writel(mixctrl, ®s->mixctrl);
-
- writel(IRQSTATEN_BRR, ®s->irqstaten);
- writel(IRQSTATEN_BRR, ®s->irqsigen);
-
- /*
- * Issue opcode repeatedly till Execute Tuning is set to 0 or the number
- * of loops reaches 40 times.
- */
- for (i = 0; i < MAX_TUNING_LOOP; i++) {
- u32 ctrl;
-
- if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200) {
- if (mmc->bus_width == 8)
- writel(0x7080, ®s->blkattr);
- else if (mmc->bus_width == 4)
- writel(0x7040, ®s->blkattr);
- } else {
- writel(0x7040, ®s->blkattr);
- }
-
- /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE) */
- val = readl(®s->mixctrl);
- val = MIX_CTRL_DTDSEL_READ | (val & ~MIX_CTRL_SDHCI_MASK);
- writel(val, ®s->mixctrl);
-
- /* We are using STD tuning, no need to check return value */
- mmc_send_tuning(mmc, opcode, NULL);
-
- ctrl = readl(®s->autoc12err);
- if ((!(ctrl & MIX_CTRL_EXE_TUNE)) &&
- (ctrl & MIX_CTRL_SMPCLK_SEL)) {
- /*
- * need to wait some time, make sure sd/mmc fininsh
- * send out tuning data, otherwise, the sd/mmc can't
- * response to any command when the card still out
- * put the tuning data.
- */
- mdelay(1);
- ret = 0;
- break;
- }
-
- /* Add 1ms delay for SD and eMMC */
- mdelay(1);
- }
-
- writel(irqstaten, ®s->irqstaten);
- writel(irqsigen, ®s->irqsigen);
-
- esdhc_stop_tuning(mmc);
-
- return ret;
-}
-#endif
-