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Date:   Tue, 20 Mar 2018 19:18:20 +0800
From:   cang@codeaurora.org
To:     Vivek Gautam <vivek.gautam@codeaurora.org>
Cc:     subhashj@codeaurora.org, asutoshd@codeaurora.org,
        mgautam@codeaurora.org, kishon@ti.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] phy: Add QMP phy based UFS phy support for sdm845.
In-Reply-To: <d64f9f24-4475-f99a-702e-c94dae89d889@codeaurora.org>
References: <20180320074318.9640-1-cang@codeaurora.org>
 <d64f9f24-4475-f99a-702e-c94dae89d889@codeaurora.org>
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On 2018-03-20 18:07, Vivek Gautam wrote:
> Hi Can,
> 
> 
> On 3/20/2018 1:13 PM, Can Guo wrote:
>> Add UFS PHY support to make SDM845 UFS work with common PHY framework.
>> 
>> Signed-off-by: Can Guo <cang@codeaurora.org>
>> ---
> 
> Thanks for the patch.
> Can you please include the dt binding documentation in this patch
> series and may be base it on Manu's patch for dt binding doc [1].
> Please create a separate patch for binding documentation.
> 
> [1]
> http://lists-archives.com/linux-kernel/29071659-dt-bindings-phy-qcom-qmp-update-bindings-for-sdm845.html
> 
> Thanks
> Vivek
> 

Thank you Vivek, shall re-send the patch with the dt bindings change as 
a patch series for you to review.

>>   drivers/phy/qualcomm/phy-qcom-qmp.c | 120 
>> +++++++++++++++++++++++++++++++++++-
>>   drivers/phy/qualcomm/phy-qcom-qmp.h |   8 +++
>>   2 files changed, 126 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c 
>> b/drivers/phy/qualcomm/phy-qcom-qmp.c
>> index 6470c5d..aeb2377 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),
>> @@ -490,6 +495,74 @@ enum qphy_reg_layout {
>>   	QMP_PHY_INIT_CFG(QPHY_V3_PCS_RXEQTRAINING_RUN_TIME, 0x13),
>>   };
>>   +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 {
>>   	/* phy-type - PCIE/UFS/USB */
>> @@ -540,6 +613,9 @@ 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;
>>   };
>>     /**
>> @@ -636,6 +712,10 @@ 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",
>> +};
>> +
>>   /* list of resets */
>>   static const char * const msm8996_pciephy_reset_l[] = {
>>   	"phy", "common", "cfg",
>> @@ -650,6 +730,10 @@ 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",
>> +};
>> +
>>   static const struct qmp_phy_cfg msm8996_pciephy_cfg = {
>>   	.type			= PHY_TYPE_PCIE,
>>   	.nlanes			= 3,
>> @@ -679,6 +763,7 @@ 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 = {
>> @@ -704,6 +789,7 @@ 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 */
>> @@ -740,6 +826,7 @@ 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 = {
>> @@ -772,6 +859,30 @@ 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 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,
>> @@ -998,7 +1109,8 @@ 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);
>>   @@ -1036,7 +1148,8 @@ 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);
>> @@ -1383,6 +1496,9 @@ int qcom_qmp_phy_create(struct device *dev, 
>> struct device_node *np, int id)
>>   	}, {
>>   		.compatible = "qcom,qmp-v3-usb3-phy",
>>   		.data = &qmp_v3_usb3phy_cfg,
>> +	}, {
>> +		.compatible = "qcom,sdm845-qmp-ufs-phy",
>> +		.data = &sdm845_ufsphy_cfg,
>>   	},
>>   	{ },
>>   };
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.h 
>> b/drivers/phy/qualcomm/phy-qcom-qmp.h
>> index d1c6905..ea4b4dc 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_RX_EQ_GAIN2_LSB			0x0c8
>>   #define QSERDES_V3_RX_RX_EQ_GAIN2_MSB			0x0cc
>> @@ -272,6 +279,7 @@
>>   #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
>>     /* Only for QMP V3 PHY - PCS_MISC registers */