Re: [PATCH V17 22/22] mmc: sdhci-pci-gli: enable UHS-II mode for GL9767

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On Fri, Jun 21, 2024 at 9:49 AM Ben Chuang <benchuanggli@xxxxxxxxx> wrote:
>
> Hi Victor,
>
> On Thu, Jun 20, 2024 at 6:46 PM Victor Shih <victorshihgli@xxxxxxxxx> wrote:
> >
> > From: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
> >
> > Changes are:
> >  * Enable the internal clock when do reset on UHS-II mode.
> >  * Increase timeout value before detecting UHS-II interface.
> >  * Add vendor settings for UHS-II mode.
> >
> > Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
> > ---
> >
> > Updates in V17:
> >  - Use mmc_card_uhs2() to simplify the code in the sdhci_gl9767_reset().
> >  - Use mmc_card_uhs2() to simplify the code in the
> >    sdhci_gl9767_set_power().
> >  - Add sdhci_gli_overcurrent_event_enable() to sdhci_gl9767_set_power().
> >
> > Updates in V15:
> >  - Add gl9767 to support uhs2 function.
> >
> > ---
> >
> >  drivers/mmc/host/sdhci-pci-gli.c | 150 ++++++++++++++++++++++++++++++-
> >  1 file changed, 148 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> > index a4164948de81..37c63c45bdc9 100644
> > --- a/drivers/mmc/host/sdhci-pci-gli.c
> > +++ b/drivers/mmc/host/sdhci-pci-gli.c
> > @@ -210,6 +210,10 @@
> >  #define   PCIE_GLI_9767_SCR_CORE_PWR_D3_OFF              BIT(21)
> >  #define   PCIE_GLI_9767_SCR_CFG_RST_DATA_LINK_DOWN       BIT(30)
> >
> > +#define PCIE_GLI_9767_UHS2_PHY_SET_REG1                                0x90C
> > +#define   PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR            GENMASK(31, 29)
> > +#define   PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE      0x3
> > +
> >  #define PCIE_GLI_9767_SDHC_CAP                 0x91C
> >  #define   PCIE_GLI_9767_SDHC_CAP_SDEI_RESULT     BIT(5)
> >
> > @@ -228,9 +232,15 @@
> >  #define   PCIE_GLI_9767_SD_EXPRESS_CTL_SD_EXPRESS_MODE   BIT(1)
> >
> >  #define PCIE_GLI_9767_SD_DATA_MULTI_CTL                                0x944
> > +#define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2            BIT(5)
> > +#define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL        BIT(8)
> >  #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME        GENMASK(23, 16)
> >  #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME_VALUE          0x64
> >
> > +#define PCIE_GLI_9767_UHS2_PHY_SET_REG2                                        0x948
> > +#define   PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING                GENMASK(22, 21)
> > +#define   PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE                  0x0
> > +
> >  #define PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2                       0x950
> >  #define   PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE         BIT(0)
> >
> > @@ -240,6 +250,28 @@
> >  #define PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2                            0x958
> >  #define   PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2_SDEI_COMPLETE_SIGNAL_EN    BIT(0)
> >
> > +#define PCIE_GLI_9767_UHS2_CTL1                                0x95C
> > +#define   PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS             BIT(5)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE       0x1
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL           BIT(6)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE     0x1
> > +#define   PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN            GENMASK(10, 7)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE      0x3
> > +#define   PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV            GENMASK(14, 11)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE      0xf
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS              GENMASK(16, 15)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE        0x3
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DIR_RECV               GENMASK(18, 17)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE         0x0
> > +#define   PCIE_GLI_9767_UHS2_CTL1_PDRST                          BIT(25)
> > +#define   PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE            0x1
> > +
> > +#define PCIE_GLI_9767_UHS2_CTL2                        0x964
> > +#define   PCIE_GLI_9767_UHS2_CTL2_ZC             GENMASK(3, 0)
> > +#define   PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE       0xb
> > +#define   PCIE_GLI_9767_UHS2_CTL2_ZC_CTL         BIT(6)
> > +#define   PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE   0x1
> > +
> >  #define GLI_MAX_TUNING_LOOP 40
> >
> >  /* Genesys Logic chipset */
> > @@ -1197,8 +1229,32 @@ static void gl9767_hw_setting(struct sdhci_pci_slot *slot)
> >
> >  static void sdhci_gl9767_reset(struct sdhci_host *host, u8 mask)
> >  {
> > -       sdhci_reset(host, mask);
> > -       gli_set_9767(host);
> > +       u16 clk_ctrl;
> > +       u16 ctrl2;
> > +
> > +       if (mmc_card_uhs2(host->mmc)) {
> > +               /* need internal clock */
> > +               if (mask & SDHCI_RESET_ALL) {
> > +                       ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> > +                       clk_ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> > +
> > +                       if ((ctrl2 & SDHCI_CTRL_V4_MODE) && (ctrl2 & SDHCI_CTRL_UHS2_ENABLE)) {
> > +                               sdhci_writew(host, SDHCI_CLOCK_INT_EN, SDHCI_CLOCK_CONTROL);
> > +                       } else {
> > +                               sdhci_writew(host, SDHCI_CLOCK_INT_EN, SDHCI_CLOCK_CONTROL);
> > +                               sdhci_wait_clock_stable(host);
> > +                               sdhci_writew(host, SDHCI_CTRL_V4_MODE, SDHCI_HOST_CONTROL2);
> > +                       }
> > +               }
> > +               if (mask & (SDHCI_RESET_CMD | SDHCI_RESET_DATA))
>
> Is this your intention?
>     -> if ((mask & SDHCI_RESET_CMD) |
>             (mask & SDHCI_RESET_DATA))
>
sorry, fix typo
     -> if ((mask & SDHCI_RESET_CMD) ||
             (mask & SDHCI_RESET_DATA))

Best regards,
Ben Chuang
>
> > +                       sdhci_gli_uhs2_reset_sd_tran(host);
> > +
> > +               sdhci_uhs2_reset(host, mask);
> > +               gli_set_9767(host);
> > +       } else {
> > +               sdhci_reset(host, mask);
> > +               gli_set_9767(host);
> > +       }
> >  }
> >
> >  static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
> > @@ -1288,6 +1344,88 @@ static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
> >         return 0;
> >  }
> >
> > +static void gl9767_vendor_init(struct sdhci_host *host)
> > +{
> > +       struct sdhci_pci_slot *slot = sdhci_priv(host);
> > +       struct pci_dev *pdev = slot->chip->pdev;
> > +       u32 value;
> > +
> > +       gl9767_vhs_write(pdev);
> > +
> > +       pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, &value);
> > +       value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR,
> > +                           PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE);
> > +       pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, value);
> > +
> > +       pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, &value);
> > +       value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING,
> > +                           PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE);
> > +       pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, value);
> > +
> > +       pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, &value);
> > +       value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS,
> > +                           PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL,
> > +                           PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN,
> > +                           PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV,
> > +                           PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS,
> > +                           PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_RECV,
> > +                           PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_PDRST,
> > +                           PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE);
> > +       pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, value);
> > +
> > +       pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, &value);
> > +       value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC,
> > +                           PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE) |
> > +                FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC_CTL,
> > +                           PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE);
> > +       pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, value);
> > +
> > +       gl9767_vhs_read(pdev);
> > +}
> > +
> > +static void sdhci_gl9767_set_power(struct sdhci_host *host, unsigned char mode,        unsigned short vdd)
> > +{
> > +       struct sdhci_pci_slot *slot = sdhci_priv(host);
> > +       struct pci_dev *pdev;
> > +       u32 value;
> > +
> > +       pdev = slot->chip->pdev;
> > +
> > +       if (mmc_card_uhs2(host->mmc)) {
> > +               gl9767_vhs_write(pdev);
> > +
> > +               pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
> > +               value |= PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
> > +                        PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL;
> > +               pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
> > +
> > +               gl9767_vhs_read(pdev);
> > +
> > +               sdhci_gli_overcurrent_event_enable(host, false);
> > +               sdhci_uhs2_set_power(host, mode, vdd);
> > +               sdhci_gli_overcurrent_event_enable(host, true);
> > +       } else {
> > +               gl9767_vhs_write(pdev);
> > +
> > +               pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
> > +               value &= ~(PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
> > +                          PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL);
> > +               pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
> > +
> > +               gl9767_vhs_read(pdev);
> > +
> > +               sdhci_gli_overcurrent_event_enable(host, false);
> > +               sdhci_set_power(host, mode, vdd);
> > +               sdhci_gli_overcurrent_event_enable(host, true);
> > +       }
> > +}
> > +
> >  static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
> >  {
> >         struct sdhci_host *host = slot->host;
> > @@ -1324,6 +1462,7 @@ static int gli_probe_slot_gl9767(struct sdhci_pci_slot *slot)
> >         host->mmc->caps2 |= MMC_CAP2_SD_EXP;
> >         host->mmc_host_ops.init_sd_express = gl9767_init_sd_express;
> >         sdhci_enable_v4_mode(host);
> > +       gl9767_vendor_init(host);
> >
> >         return 0;
> >  }
> > @@ -1827,12 +1966,19 @@ static const struct sdhci_ops sdhci_gl9767_ops = {
> >         .reset                   = sdhci_gl9767_reset,
> >         .set_uhs_signaling       = sdhci_set_uhs_signaling,
> >         .voltage_switch          = sdhci_gl9767_voltage_switch,
> > +       .dump_uhs2_regs          = sdhci_uhs2_dump_regs,
> > +       .set_timeout             = sdhci_uhs2_set_timeout,
> > +       .irq                     = sdhci_uhs2_irq,
> > +       .set_power               = sdhci_gl9767_set_power,
> > +       .uhs2_pre_detect_init    = sdhci_gli_pre_detect_init,
> >  };
> >
> >  const struct sdhci_pci_fixes sdhci_gl9767 = {
> >         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
> >         .quirks2        = SDHCI_QUIRK2_BROKEN_DDR50,
> >         .probe_slot     = gli_probe_slot_gl9767,
> > +       .add_host       = sdhci_pci_uhs2_add_host,
> > +       .remove_host    = sdhci_pci_uhs2_remove_host,
> >         .ops            = &sdhci_gl9767_ops,
> >  #ifdef CONFIG_PM_SLEEP
> >         .resume         = sdhci_pci_gli_resume,
> > --
> > 2.25.1
> >





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