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References: <cover.1679909245.git.quic_varada@quicinc.com> <b4504cbc87e526de92a423dd21c389b30068761b.1679909245.git.quic_varada@quicinc.com>
In-Reply-To: <b4504cbc87e526de92a423dd21c389b30068761b.1679909245.git.quic_varada@quicinc.com>
From:   Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date:   Mon, 27 Mar 2023 12:57:36 +0300
Message-ID: <CAA8EJpo+1mg74-DbkjDs51LdCRR4Y9KjtUBvA=neNdyZZ34zFw@mail.gmail.com>
Subject: Re: [PATCH v4 6/8] phy: qcom: qmp: Update IPQ9574 USB Phy
 initialization Sequence
To:     Varadarajan Narayanan <quic_varada@quicinc.com>
Cc:     agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org,
        vkoul@kernel.org, kishon@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, gregkh@linuxfoundation.org,
        mturquette@baylibre.com, sboyd@kernel.org, quic_wcheng@quicinc.com,
        linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, linux-clk@vger.kernel.org,
        Praveenkumar I <quic_ipkumar@quicinc.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Mon, 27 Mar 2023 at 12:32, Varadarajan Narayanan
<quic_varada@quicinc.com> wrote:
>
> Updated USB QMP PHY Init sequence based on HPG for IPQ9574.
> Reused clock and reset list from existing targets.
>
> Signed-off-by: Praveenkumar I <quic_ipkumar@quicinc.com>
> Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> ---
>  Changes in v4:
>         - Use qmp_usb_offsets for register space access
>  Changes in v3:
>         - Fix hex captitalization
>  Changes in v2:
>         - Removed unused phy register offsets
>         - Moved the clock entries to the correct place
>         - Maintain sorted order
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 129 ++++++++++++++++++++++++++++++++
>  1 file changed, 129 insertions(+)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> index a49711c..ed5f794 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> @@ -94,6 +94,7 @@ enum qphy_reg_layout {
>         QPHY_PCS_STATUS,
>         QPHY_PCS_AUTONOMOUS_MODE_CTRL,
>         QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR,
> +       QPHY_PCS_LFPS_RXTERM_IRQ_STATUS,

This is unused

>         QPHY_PCS_POWER_DOWN_CONTROL,
>         /* Keep last to ensure regs_layout arrays are properly initialized */
>         QPHY_LAYOUT_SIZE
> @@ -139,6 +140,97 @@ static const unsigned int qmp_v5_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
>         [QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR] = QPHY_V5_PCS_USB3_LFPS_RXTERM_IRQ_CLEAR,
>  };
>
> +static const unsigned int usb3phy_regs_layout[] = {
> +       [QPHY_SW_RESET]                         = 0x00,
> +       [QPHY_START_CTRL]                       = 0x08,
> +       [QPHY_PCS_STATUS]                       = 0x17c,
> +       [QPHY_PCS_AUTONOMOUS_MODE_CTRL]         = 0x0d4,
> +       [QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR]        = 0x0d8,
> +       [QPHY_PCS_POWER_DOWN_CONTROL]           = 0x04,
> +};

This does not look correct. you are yousing QPHY_V3_PCS for the table,
while your register layout corresponds to QPHY_V2_PCS registers.
Please doublecheck this. Also, is there any reason to duplicate
existing qmp_v2_usb3phy_regs_layout or qmp_v3_usb3phy_regs_layout?

> +
> +static const struct qmp_phy_init_tbl ipq9574_usb3_serdes_tbl[] = {
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x1a),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x30),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x06),
> +       /* PLL and Loop filter settings */
> +       QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x68),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0xab),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0xaa),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x02),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x09),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0xa0),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0xaa),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x29),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_CFG, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x0a),
> +       /* SSC settings */
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x7d),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x0a),
> +       QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x05),
> +};
> +
> +static const struct qmp_phy_init_tbl ipq9574_usb3_tx_tbl[] = {
> +       QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
> +       QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
> +       QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
> +};
> +
> +static const struct qmp_phy_init_tbl ipq9574_usb3_rx_tbl[] = {
> +       QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x06),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x02),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x6c),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x4c),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xb8),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x77),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2, 0x80),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x03),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x16),
> +       QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x0c),
> +};
> +
> +static const struct qmp_phy_init_tbl ipq9574_usb3_pcs_tbl[] = {
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_TXDEEMPH_M6DB_V0, 0x15),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_TXDEEMPH_M3P5DB_V0, 0x0e),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_FLL_CNTRL2, 0x83),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_FLL_CNTRL1, 0x02),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_FLL_CNT_VAL_L, 0x09),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_FLL_CNT_VAL_H_TOL, 0xa2),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_FLL_MAN_CODE, 0x85),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_LOCK_DETECT_CONFIG1, 0xd1),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_LOCK_DETECT_CONFIG2, 0x1f),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_LOCK_DETECT_CONFIG3, 0x47),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_POWER_STATE_CONFIG2, 0x1b),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RXEQTRAINING_WAIT_TIME, 0x75),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RXEQTRAINING_RUN_TIME, 0x13),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_LFPS_TX_ECSTART_EQTLOCK, 0x86),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_PWRUP_RESET_DLY_TIME_AUXCLK, 0x04),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_TSYNC_RSYNC_TIME, 0x44),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RCVR_DTCT_DLY_P1U2_L, 0xe7),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RCVR_DTCT_DLY_P1U2_H, 0x03),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RCVR_DTCT_DLY_U3_L, 0x40),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RCVR_DTCT_DLY_U3_H, 0x00),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_RX_SIGDET_LVL, 0x88),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_TXDEEMPH_M6DB_V0, 0x17),
> +       QMP_PHY_INIT_CFG(QPHY_V3_PCS_TXDEEMPH_M3P5DB_V0, 0x0f),
> +};
> +
>  static const struct qmp_phy_init_tbl ipq8074_usb3_serdes_tbl[] = {
>         QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x1a),
>         QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08),
> @@ -1510,6 +1602,10 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>  }
>
>  /* list of clocks required by phy */
> +static const char * const ipq9574_phy_clk_l[] = {
> +       "aux", "cfg_ahb",

No ref clock?

> +};
> +
>  static const char * const msm8996_phy_clk_l[] = {
>         "aux", "cfg_ahb", "ref",
>  };
> @@ -1558,6 +1654,14 @@ static const char * const qmp_phy_vreg_l[] = {
>         "vdda-phy", "vdda-pll",
>  };
>
> +static const struct qmp_usb_offsets qmp_usb_offsets_ipq9574 = {
> +       .serdes         = 0,
> +       .pcs            = 0x800,
> +       .pcs_usb        = 0x600,

Are you confusing pcs_usb vs pcs_misc? There was no separate pcs_usb on v3 PHYs

> +       .tx             = 0x200,
> +       .rx             = 0x400,
> +};
> +
>  static const struct qmp_usb_offsets qmp_usb_offsets_v5 = {
>         .serdes         = 0,
>         .pcs            = 0x0200,
> @@ -1586,6 +1690,28 @@ static const struct qmp_phy_cfg ipq8074_usb3phy_cfg = {
>         .regs                   = qmp_v3_usb3phy_regs_layout,
>  };
>
> +static const struct qmp_phy_cfg ipq9574_usb3phy_cfg = {
> +       .lanes                  = 1,
> +
> +       .offsets                = &qmp_usb_offsets_ipq9574,
> +
> +       .serdes_tbl             = ipq9574_usb3_serdes_tbl,
> +       .serdes_tbl_num         = ARRAY_SIZE(ipq9574_usb3_serdes_tbl),
> +       .tx_tbl                 = ipq9574_usb3_tx_tbl,
> +       .tx_tbl_num             = ARRAY_SIZE(ipq9574_usb3_tx_tbl),
> +       .rx_tbl                 = ipq9574_usb3_rx_tbl,
> +       .rx_tbl_num             = ARRAY_SIZE(ipq9574_usb3_rx_tbl),
> +       .pcs_tbl                = ipq9574_usb3_pcs_tbl,
> +       .pcs_tbl_num            = ARRAY_SIZE(ipq9574_usb3_pcs_tbl),
> +       .clk_list               = ipq9574_phy_clk_l,
> +       .num_clks               = ARRAY_SIZE(ipq9574_phy_clk_l),
> +       .reset_list             = msm8996_usb3phy_reset_l,
> +       .num_resets             = ARRAY_SIZE(msm8996_usb3phy_reset_l),
> +       .vreg_list              = qmp_phy_vreg_l,
> +       .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
> +       .regs                   = usb3phy_regs_layout,
> +};
> +
>  static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
>         .lanes                  = 1,
>
> @@ -2589,6 +2715,9 @@ static const struct of_device_id qmp_usb_of_match_table[] = {
>                 .compatible = "qcom,ipq8074-qmp-usb3-phy",
>                 .data = &ipq8074_usb3phy_cfg,
>         }, {
> +               .compatible = "qcom,ipq9574-qmp-usb3-phy",
> +               .data = &ipq9574_usb3phy_cfg,
> +       }, {
>                 .compatible = "qcom,msm8996-qmp-usb3-phy",
>                 .data = &msm8996_usb3phy_cfg,
>         }, {
> --
> 2.7.4
>


-- 
With best wishes
Dmitry