Re: [PATCH v4 6/8] phy: qcom: qmp: Update IPQ9574 USB Phy initialization Sequence

From: Dmitry Baryshkov
Date: Mon Mar 27 2023 - 05:57:53 EST

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In reply to: Varadarajan Narayanan: "[PATCH v4 6/8] phy: qcom: qmp: Update IPQ9574 USB Phy initialization Sequence"
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On Mon, 27 Mar 2023 at 12:32, Varadarajan Narayanan
<quic_varada@xxxxxxxxxxx> 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@xxxxxxxxxxx>
> Signed-off-by: Varadarajan Narayanan <quic_varada@xxxxxxxxxxx>
> ---
> 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

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In reply to: Varadarajan Narayanan: "[PATCH v4 6/8] phy: qcom: qmp: Update IPQ9574 USB Phy initialization Sequence"
Next in thread: Varadarajan Narayanan: "Re: [PATCH v4 6/8] phy: qcom: qmp: Update IPQ9574 USB Phy initialization Sequence"
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