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Date: Mon, 26 Mar 2018 20:26:13 +0530
From: Vivek Gautam <vivek.gautam@...eaurora.org>
To: Can Guo <cang@...eaurora.org>, subhashj@...eaurora.org,
asutoshd@...eaurora.org, mgautam@...eaurora.org, kishon@...com,
robh+dt@...nel.org, mark.rutland@....com
Cc: 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
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.
> +};
> +
> /* 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.
> +
> 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
> +};
> +
> +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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