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Message-ID: <eb0f1acbe3c2dd0b1f4b296eaf458fa0@codeaurora.org>
Date: Tue, 27 Mar 2018 15:10:59 +0800
From: cang@...eaurora.org
To: Vivek Gautam <vivek.gautam@...eaurora.org>
Cc: subhashj@...eaurora.org, asutoshd@...eaurora.org,
mgautam@...eaurora.org, kishon@...com, robh+dt@...nel.org,
mark.rutland@....com, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] phy: Add QMP phy based UFS phy support for sdm845
On 2018-03-26 22:56, Vivek Gautam wrote:
> Hi Can,
>
>
> On 3/21/2018 11:07 AM, Can Guo wrote:
>> Add UFS PHY support to make SDM845 UFS work with common PHY framework.
>>
>> Signed-off-by: Can Guo <cang@...eaurora.org>
>> ---
>
> Thanks for the patch. Just few minor nits, and we are good. Please see
> comments inline.
>
>> drivers/phy/qualcomm/phy-qcom-qmp.c | 122
>> +++++++++++++++++++++++++++++++++++-
>> drivers/phy/qualcomm/phy-qcom-qmp.h | 8 +++
>> 2 files changed, 127 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c
>> b/drivers/phy/qualcomm/phy-qcom-qmp.c
>> index 5cf2c3c..85d40d4 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
>> @@ -156,6 +156,11 @@ enum qphy_reg_layout {
>> [QPHY_PCS_LFPS_RXTERM_IRQ_STATUS] = 0x170,
>> };
>> +static const unsigned int sdm845_ufsphy_regs_layout[] = {
>> + [QPHY_START_CTRL] = 0x00,
>> + [QPHY_PCS_READY_STATUS] = 0x168,
>> +};
>> +
>> static const struct qmp_phy_init_tbl msm8996_pcie_serdes_tbl[] = {
>> QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x1c),
>> QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
>> @@ -601,6 +606,73 @@ enum qphy_reg_layout {
>> QMP_PHY_INIT_CFG(QPHY_V3_PCS_REFGEN_REQ_CONFIG2, 0x60),
>> };
>> +static const struct qmp_phy_init_tbl sdm845_ufsphy_serdes_tbl[] = {
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_SYS_CLK_CTRL, 0x02),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_BG_TIMER, 0x0a),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_IVCO, 0x0f),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_CMN_CONFIG, 0x06),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_SYSCLK_EN_SEL, 0xd5),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_RESETSM_CNTRL, 0x20),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_CLK_SELECT, 0x30),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_HSCLK_SEL, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_LOCK_CMP_EN, 0x01),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE_CTRL, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_CORE_CLK_EN, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE_MAP, 0x04),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_SVS_MODE_CLK_SEL, 0x05),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE_INITVAL1, 0xff),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE_INITVAL2, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_DEC_START_MODE0, 0x82),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_CP_CTRL_MODE0, 0x06),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_RCTRL_MODE0, 0x16),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_CCTRL_MODE0, 0x36),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_INTEGLOOP_GAIN0_MODE0, 0x3f),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_INTEGLOOP_GAIN1_MODE0, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE1_MODE0, 0xda),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE2_MODE0, 0x01),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_LOCK_CMP1_MODE0, 0xff),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_LOCK_CMP2_MODE0, 0x0c),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_DEC_START_MODE1, 0x98),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_CP_CTRL_MODE1, 0x06),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_RCTRL_MODE1, 0x16),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_CCTRL_MODE1, 0x36),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_INTEGLOOP_GAIN0_MODE1, 0x3f),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_INTEGLOOP_GAIN1_MODE1, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE1_MODE1, 0xc1),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE2_MODE1, 0x00),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_LOCK_CMP1_MODE1, 0x32),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_LOCK_CMP2_MODE1, 0x0f),
>> +
>> + /* Rate B */
>> + QMP_PHY_INIT_CFG(QSERDES_V3_COM_VCO_TUNE_MAP, 0x44),
>> +};
>> +
>> +static const struct qmp_phy_init_tbl sdm845_ufsphy_tx_tbl[] = {
>> + QMP_PHY_INIT_CFG(QSERDES_V3_TX_LANE_MODE_1, 0x06),
>> +};
>> +
>> +static const struct qmp_phy_init_tbl sdm845_ufsphy_rx_tbl[] = {
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_SIGDET_LVL, 0x24),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_SIGDET_CNTRL, 0x0f),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_SIGDET_DEGLITCH_CNTRL, 0x1e),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_INTERFACE_MODE, 0x40),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_TERM_BW, 0x5b),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_EQU_ADAPTOR_CNTRL2, 0x06),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_EQU_ADAPTOR_CNTRL3, 0x04),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_EQU_ADAPTOR_CNTRL4, 0x1d),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_SVS_SO_GAIN_HALF, 0x04),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_SVS_SO_GAIN_QUARTER, 0x04),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_SVS_SO_GAIN, 0x04),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_PI_CONTROLS, 0x81),
>> + QMP_PHY_INIT_CFG(QSERDES_V3_RX_UCDR_FASTLOCK_COUNT_LOW, 0x80),
>> +};
>> +
>> +static const struct qmp_phy_init_tbl sdm845_ufsphy_pcs_tbl[] = {
>> + QMP_PHY_INIT_CFG(QPHY_V3_PCS_POWER_DOWN_CONTROL, 0x01),
>> + QMP_PHY_INIT_CFG(QPHY_V3_PCS_MULTI_LANE_CTRL1, 0x02),
>> +};
>> /* struct qmp_phy_cfg - per-PHY initialization config */
>> struct qmp_phy_cfg {
>> @@ -652,6 +724,9 @@ struct qmp_phy_cfg {
>> /* Register offset of secondary tx/rx lanes for USB DP combo PHY */
>> unsigned int tx_b_lane_offset;
>> unsigned int rx_b_lane_offset;
>> +
>> + /* true, if PCS block has a separate SW_RESET register */
>> + bool has_sw_rst;
>> };
>> /**
>> @@ -748,6 +823,10 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> "aux", "cfg_ahb", "ref", "com_aux",
>> };
>> +static const char * const sdm845_ufs_phy_clk_l[] = {
>> + "ref_clk", "ref_aux_clk",
>
> Only "ref", "ref_aux" like other clock lists. No need to put explicit
> clk suffix.
>
Done, thank you for pointing this out.
>> +};
>> +
>> /* list of resets */
>> static const char * const msm8996_pciephy_reset_l[] = {
>> "phy", "common", "cfg",
>> @@ -762,6 +841,10 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> "vdda-phy", "vdda-pll",
>> };
>> +static const char * const sdm845_phy_vreg_l[] = {
>> + "vdda-phy", "vdda-pll",
>> +};
>
> We can reuse the regulator list that we already has. May be rename that
> to something generic.
>
Yes, shall name it to qmp_phy_vreg_l
>> +
>> static const struct qmp_phy_cfg msm8996_pciephy_cfg = {
>> .type = PHY_TYPE_PCIE,
>> .nlanes = 3,
>> @@ -791,6 +874,7 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> .has_pwrdn_delay = true,
>> .pwrdn_delay_min = POWER_DOWN_DELAY_US_MIN,
>> .pwrdn_delay_max = POWER_DOWN_DELAY_US_MAX,
>> + .has_sw_rst = true,
>> };
>> static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
>> @@ -816,6 +900,7 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> .start_ctrl = SERDES_START | PCS_START,
>> .pwrdn_ctrl = SW_PWRDN,
>> .mask_pcs_ready = PHYSTATUS,
>> + .has_sw_rst = true,
>> };
>> /* list of resets */
>> @@ -852,6 +937,7 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> .has_pwrdn_delay = true,
>> .pwrdn_delay_min = 995, /* us */
>> .pwrdn_delay_max = 1005, /* us */
>> + .has_sw_rst = true,
>> };
>> static const struct qmp_phy_cfg qmp_v3_usb3phy_cfg = {
>> @@ -885,6 +971,7 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> .has_phy_dp_com_ctrl = true,
>> .tx_b_lane_offset = 0x400,
>> .rx_b_lane_offset = 0x400,
>> + .has_sw_rst = true,
>> };
>> static const struct qmp_phy_cfg qmp_v3_usb3_uniphy_cfg = {
>> @@ -914,6 +1001,30 @@ static inline void qphy_clrbits(void __iomem
>> *base, u32 offset, u32 val)
>> .has_pwrdn_delay = true,
>> .pwrdn_delay_min = POWER_DOWN_DELAY_US_MIN,
>> .pwrdn_delay_max = POWER_DOWN_DELAY_US_MAX,
>> + .has_sw_rst = true,
>
> If every other has it and not ufs, then better name it otherwise - may
> be "skip_sw_rst", which can be 'true' for UFS.
>
>
> Best regards
> Vivek
>
Good idea!
>> +};
>> +
>> +static const struct qmp_phy_cfg sdm845_ufsphy_cfg = {
>> + .type = PHY_TYPE_UFS,
>> + .nlanes = 2,
>> +
>> + .serdes_tbl = sdm845_ufsphy_serdes_tbl,
>> + .serdes_tbl_num = ARRAY_SIZE(sdm845_ufsphy_serdes_tbl),
>> + .tx_tbl = sdm845_ufsphy_tx_tbl,
>> + .tx_tbl_num = ARRAY_SIZE(sdm845_ufsphy_tx_tbl),
>> + .rx_tbl = sdm845_ufsphy_rx_tbl,
>> + .rx_tbl_num = ARRAY_SIZE(sdm845_ufsphy_rx_tbl),
>> + .pcs_tbl = sdm845_ufsphy_pcs_tbl,
>> + .pcs_tbl_num = ARRAY_SIZE(sdm845_ufsphy_pcs_tbl),
>> + .clk_list = sdm845_ufs_phy_clk_l,
>> + .num_clks = ARRAY_SIZE(sdm845_ufs_phy_clk_l),
>> + .vreg_list = sdm845_phy_vreg_l,
>> + .num_vregs = ARRAY_SIZE(sdm845_phy_vreg_l),
>> + .regs = sdm845_ufsphy_regs_layout,
>> +
>> + .start_ctrl = SERDES_START,
>> + .pwrdn_ctrl = SW_PWRDN,
>> + .mask_pcs_ready = PCS_READY,
>> };
>> static void qcom_qmp_phy_configure(void __iomem *base,
>> @@ -1140,7 +1251,8 @@ static int qcom_qmp_phy_init(struct phy *phy)
>> usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
>> /* Pull PHY out of reset state */
>> - qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
>> + if (cfg->has_sw_rst)
>> + qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
>> if (cfg->has_phy_dp_com_ctrl)
>> qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
>> @@ -1178,7 +1290,8 @@ static int qcom_qmp_phy_exit(struct phy *phy)
>> clk_disable_unprepare(qphy->pipe_clk);
>> /* PHY reset */
>> - qphy_setbits(qphy->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
>> + if (cfg->has_sw_rst)
>> + qphy_setbits(qphy->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
>> /* stop SerDes and Phy-Coding-Sublayer */
>> qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL],
>> cfg->start_ctrl);
>> @@ -1531,7 +1644,10 @@ int qcom_qmp_phy_create(struct device *dev,
>> struct device_node *np, int id)
>> }, {
>> .compatible = "qcom,sdm845-qmp-usb3-uni-phy",
>> .data = &qmp_v3_usb3_uniphy_cfg,
>> - },
>> + }, {
>> + .compatible = "qcom,sdm845-qmp-ufs-phy",
>> + .data = &sdm845_ufsphy_cfg,
>> + },
>> { },
>> };
>> MODULE_DEVICE_TABLE(of, qcom_qmp_phy_of_match_table);
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.h
>> b/drivers/phy/qualcomm/phy-qcom-qmp.h
>> index 5d78d43..3cbcfe1 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp.h
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.h
>> @@ -184,6 +184,8 @@
>> #define QSERDES_V3_COM_VCO_TUNE2_MODE0 0x0f8
>> #define QSERDES_V3_COM_VCO_TUNE1_MODE1 0x0fc
>> #define QSERDES_V3_COM_VCO_TUNE2_MODE1 0x100
>> +#define QSERDES_V3_COM_VCO_TUNE_INITVAL1 0x104
>> +#define QSERDES_V3_COM_VCO_TUNE_INITVAL2 0x108
>> #define QSERDES_V3_COM_VCO_TUNE_TIMER1 0x11c
>> #define QSERDES_V3_COM_VCO_TUNE_TIMER2 0x120
>> #define QSERDES_V3_COM_CLK_SELECT 0x138
>> @@ -211,8 +213,13 @@
>> /* Only for QMP V3 PHY - RX registers */
>> #define QSERDES_V3_RX_UCDR_SO_GAIN_HALF 0x00c
>> #define QSERDES_V3_RX_UCDR_SO_GAIN 0x014
>> +#define QSERDES_V3_RX_UCDR_SVS_SO_GAIN_HALF 0x024
>> +#define QSERDES_V3_RX_UCDR_SVS_SO_GAIN_QUARTER 0x028
>> +#define QSERDES_V3_RX_UCDR_SVS_SO_GAIN 0x02c
>> #define QSERDES_V3_RX_UCDR_FASTLOCK_FO_GAIN 0x030
>> #define QSERDES_V3_RX_UCDR_SO_SATURATION_AND_ENABLE 0x034
>> +#define QSERDES_V3_RX_UCDR_FASTLOCK_COUNT_LOW 0x03c
>> +#define QSERDES_V3_RX_UCDR_PI_CONTROLS 0x044
>> #define QSERDES_V3_RX_RX_TERM_BW 0x07c
>> #define QSERDES_V3_RX_VGA_CAL_CNTRL1 0x0bc
>> #define QSERDES_V3_RX_VGA_CAL_CNTRL2 0x0c0
>> @@ -275,6 +282,7 @@
>> #define QPHY_V3_PCS_FLL_CNT_VAL_L 0x0cc
>> #define QPHY_V3_PCS_FLL_CNT_VAL_H_TOL 0x0d0
>> #define QPHY_V3_PCS_FLL_MAN_CODE 0x0d4
>> +#define QPHY_V3_PCS_MULTI_LANE_CTRL1 0x1c4
>> #define QPHY_V3_PCS_RX_SIGDET_LVL 0x1d8
>> #define QPHY_V3_PCS_REFGEN_REQ_CONFIG1 0x20c
>> #define QPHY_V3_PCS_REFGEN_REQ_CONFIG2 0x210
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