linux-kernel - Re: [PATCH V5 4/4] mmc: sdhci-pci-gli: Add support SD Express card for GL9767

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Date:   Fri, 9 Jun 2023 00:49:52 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Victor Shih <victorshihgli@...il.com>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, benchuanggli@...il.com,
        HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>,
        Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V5 4/4] mmc: sdhci-pci-gli: Add support SD Express card
 for GL9767

[...]

> +static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
> +{
> +       struct sdhci_host *host = mmc_priv(mmc);
> +       struct sdhci_pci_slot *slot = sdhci_priv(host);
> +       struct pci_dev *pdev;
> +       u32 value;
> +       int i;
> +
> +       pdev = slot->chip->pdev;
> +
> +       if (mmc->ops->get_ro(mmc)) {
> +               mmc->ios.timing &= ~(MMC_TIMING_SD_EXP | MMC_TIMING_SD_EXP_1_2V);
> +               return 0;
> +       }
> +
> +       gl9767_vhs_write(pdev);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_COMBO_MUX_CTL, &value);
> +       value &= ~(PCIE_GLI_9767_COMBO_MUX_CTL_RST_EN | PCIE_GLI_9767_COMBO_MUX_CTL_WAIT_PERST_EN);
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_COMBO_MUX_CTL, value);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
> +       value &= ~PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME;
> +       value |= FIELD_PREP(PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME,
> +                           PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME_VALUE);
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2, &value);
> +       value |= PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE;
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2, value);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2, &value);
> +       value |= PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2_SDEI_COMPLETE_STATUS_EN;
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2, value);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2, &value);
> +       value |= PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2_SDEI_COMPLETE_SIGNAL_EN;
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2, value);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
> +       value |= PCIE_GLI_9767_CFG_LOW_PWR_OFF;
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
> +
> +       value = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> +       value &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_PLL_EN);
> +       sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);
> +
> +       value = sdhci_readb(host, SDHCI_POWER_CONTROL);
> +       value |= (SDHCI_VDD2_POWER_180 | SDHCI_VDD2_POWER_ON);
> +       sdhci_writeb(host, value, SDHCI_POWER_CONTROL);
> +
> +       pci_read_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, &value);
> +       value |= PCIE_GLI_9767_SD_EXPRESS_CTL_SDEI_EXE;
> +       pci_write_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, value);
> +
> +       for (i = 0; i < 2; i++) {
> +               msleep(10);

Please convert to usleep_range().

[...]

Kind regards
Uffe