[PATCH v7 0/4] Support for Qualcomm UFS QMP PHY on SDM845

[PATCH v7 0/4] Support for Qualcomm UFS QMP PHY on SDM845

[Can Guo]

This patch series adds support for UFS QMP PHY on SDM845 and the
compatible string for it. This patch series depends on the current
proposed QMP V3 USB3 UNI PHY support for sdm845 driver [1], on
the DT bindings for the QMP V3 USB3 PHYs based dirver [2], and also
rebased on updated pipe_clk initialization sequence [3]. This series
can only be merged once the dependent patches do.
[1] http://lists-archives.com/linux-kernel/29071659-dt-bindings-phy-qcom-qmp-update-bindings-for-sdm845.html
[2] http://lists-archives.com/linux-kernel/29071660-phy-qcom-qmp-add-qmp-v3-usb3-uni-phy-support-for-sdm845.html
[3] https://patchwork.kernel.org/patch/10376551/

Changes since v6:
- Add one new change to clean up some structs and field
- Updates the PHY power control sequence.
- Incorporated review comments from Vivek and Manu.

Changes since v5:
- Updates the PHY power control sequence.
- Updates UFS PHY power on condition check.

Changes since v4:
- Adds 'ref_aux' clock back to SDM845 UFS PHY clock list.
- Power on PHY before serdes configuration starts.
- Updates the UFS PHY initialization sequence.
- Updates a few UFS PHY registers.
- Incorporated review comments from Vivek and Manu.

Changes since v3:
- Incorporated review comments from Vivek and Rob.

Changes since v2:
- Incorporated review comments from Vivek and Rob.
- Remove "ref_aux" from sdm845 ufs phy clock list structure.

Changes since v1:
- Incorporated review comments from Vivek and Manu.
- Update the commit title of patch 2.

Can Guo (4):
  phy: Update PHY power control sequence
  phy: General struct and field cleanup
  phy: Add QMP phy based UFS phy support for sdm845
  dt-bindings: phy-qcom-qmp: Add UFS phy compatible string for sdm845

 .../devicetree/bindings/phy/qcom-qmp-phy.txt       |   4 +-
 drivers/phy/qualcomm/phy-qcom-qmp.c                | 217 +++++++++++++++++++--
 drivers/phy/qualcomm/phy-qcom-qmp.h                |  15 ++
 3 files changed, 216 insertions(+), 20 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v7 1/4] phy: Update PHY power control sequence

[Can Guo]

All PHYs should be powered on before register configuration starts. And
only PCIe PHYs need an extra power control before deasserts reset state.

Signed-off-by: Can Guo <cang@codeaurora.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 97ef942..ccb8578 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -935,10 +935,12 @@ static void qcom_qmp_phy_configure(void __iomem *base,
 	}
 }
 
-static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
+static int qcom_qmp_phy_com_init(struct qmp_phy *qphy)
 {
+	struct qcom_qmp *qmp = qphy->qmp;
 	const struct qmp_phy_cfg *cfg = qmp->cfg;
 	void __iomem *serdes = qmp->serdes;
+	void __iomem *pcs = qphy->pcs;
 	void __iomem *dp_com = qmp->dp_com;
 	int ret, i;
 
@@ -979,10 +981,6 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
 		goto err_rst;
 	}
 
-	if (cfg->has_phy_com_ctrl)
-		qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
-			     SW_PWRDN);
-
 	if (cfg->has_phy_dp_com_ctrl) {
 		qphy_setbits(dp_com, QPHY_V3_DP_COM_POWER_DOWN_CTRL,
 			     SW_PWRDN);
@@ -1000,6 +998,12 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
 			     SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
 	}
 
+	if (cfg->has_phy_com_ctrl)
+		qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
+			     SW_PWRDN);
+	else
+		qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
+
 	/* Serdes configuration */
 	qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
 			       cfg->serdes_tbl_num);
@@ -1090,7 +1094,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
 
 	dev_vdbg(qmp->dev, "Initializing QMP phy\n");
 
-	ret = qcom_qmp_phy_com_init(qmp);
+	ret = qcom_qmp_phy_com_init(qphy);
 	if (ret)
 		return ret;
 
@@ -1127,7 +1131,8 @@ static int qcom_qmp_phy_init(struct phy *phy)
 	 * Pull out PHY from POWER DOWN state.
 	 * This is active low enable signal to power-down PHY.
 	 */
-	qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
+	if(cfg->type == PHY_TYPE_PCIE)
+		qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
 
 	if (cfg->has_pwrdn_delay)
 		usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v7 1/4] phy: Update PHY power control sequence

[Manu Gautam]

On 6/19/2018 2:06 PM, Can Guo wrote:
> All PHYs should be powered on before register configuration starts. And
> only PCIe PHYs need an extra power control before deasserts reset state.
> 
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)

Reviewed-by: Manu Gautam <mgautam@codeaurora.org>

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v7 1/4] phy: Update PHY power control sequence

[Vivek Gautam]

On Tue, Jun 19, 2018 at 2:06 PM, Can Guo <cang@codeaurora.org> wrote:
> All PHYs should be powered on before register configuration starts. And
> only PCIe PHYs need an extra power control before deasserts reset state.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index 97ef942..ccb8578 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -935,10 +935,12 @@ static void qcom_qmp_phy_configure(void __iomem *base,
>         }
>  }
>
> -static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
> +static int qcom_qmp_phy_com_init(struct qmp_phy *qphy)
>  {
> +       struct qcom_qmp *qmp = qphy->qmp;
>         const struct qmp_phy_cfg *cfg = qmp->cfg;
>         void __iomem *serdes = qmp->serdes;
> +       void __iomem *pcs = qphy->pcs;
>         void __iomem *dp_com = qmp->dp_com;
>         int ret, i;
>
> @@ -979,10 +981,6 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
>                 goto err_rst;
>         }
>
> -       if (cfg->has_phy_com_ctrl)
> -               qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
> -                            SW_PWRDN);
> -
>         if (cfg->has_phy_dp_com_ctrl) {
>                 qphy_setbits(dp_com, QPHY_V3_DP_COM_POWER_DOWN_CTRL,
>                              SW_PWRDN);
> @@ -1000,6 +998,12 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
>                              SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
>         }
>
> +       if (cfg->has_phy_com_ctrl)
> +               qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
> +                            SW_PWRDN);
> +       else
> +               qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
> +
>         /* Serdes configuration */
>         qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
>                                cfg->serdes_tbl_num);
> @@ -1090,7 +1094,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
>
>         dev_vdbg(qmp->dev, "Initializing QMP phy\n");
>
> -       ret = qcom_qmp_phy_com_init(qmp);
> +       ret = qcom_qmp_phy_com_init(qphy);
>         if (ret)
>                 return ret;
>
> @@ -1127,7 +1131,8 @@ static int qcom_qmp_phy_init(struct phy *phy)
>          * Pull out PHY from POWER DOWN state.
>          * This is active low enable signal to power-down PHY.
>          */
> -       qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
> +       if(cfg->type == PHY_TYPE_PCIE)
> +               qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
>
>         if (cfg->has_pwrdn_delay)
>                 usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Looks good.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>

Best regards
Vivek
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v7 1/4] phy: Update PHY power control sequence

[Evan Green]

On Mon, Jul 2, 2018 at 10:00 AM Vivek Gautam
<vivek.gautam@codeaurora.org> wrote:
>
> On Tue, Jun 19, 2018 at 2:06 PM, Can Guo <cang@codeaurora.org> wrote:
> > All PHYs should be powered on before register configuration starts. And
> > only PCIe PHYs need an extra power control before deasserts reset state.
> >
> > Signed-off-by: Can Guo <cang@codeaurora.org>
> > ---
> >  drivers/phy/qualcomm/phy-qcom-qmp.c | 19 ++++++++++++-------
> >  1 file changed, 12 insertions(+), 7 deletions(-)
> >

Reviewed-by: Evan Green <evgreen@chromium.org>

[PATCH v7 2/4] phy: General struct and field cleanup

[Can Guo]

Move MSM8996 specific PHY vreg list struct name to a genernal one as it is
used by all PHYs. Add a specific field to handle dual lane situation.

Signed-off-by: Can Guo <cang@codeaurora.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index ccb8578..9be9754 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -649,6 +649,8 @@ struct qmp_phy_cfg {
 
 	/* true, if PHY has a separate DP_COM control block */
 	bool has_phy_dp_com_ctrl;
+	/* true, if PHY has secondary tx/rx lanes to be configured */
+	bool is_dual_lane_phy;
 	/* Register offset of secondary tx/rx lanes for USB DP combo PHY */
 	unsigned int tx_b_lane_offset;
 	unsigned int rx_b_lane_offset;
@@ -758,7 +760,7 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 };
 
 /* list of regulators */
-static const char * const msm8996_phy_vreg_l[] = {
+static const char * const qmp_phy_vreg_l[] = {
 	"vdda-phy", "vdda-pll",
 };
 
@@ -778,8 +780,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.num_clks		= ARRAY_SIZE(msm8996_phy_clk_l),
 	.reset_list		= msm8996_pciephy_reset_l,
 	.num_resets		= ARRAY_SIZE(msm8996_pciephy_reset_l),
-	.vreg_list		= msm8996_phy_vreg_l,
-	.num_vregs		= ARRAY_SIZE(msm8996_phy_vreg_l),
+	.vreg_list		= qmp_phy_vreg_l,
+	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
 	.regs			= pciephy_regs_layout,
 
 	.start_ctrl		= PCS_START | PLL_READY_GATE_EN,
@@ -809,8 +811,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.num_clks		= ARRAY_SIZE(msm8996_phy_clk_l),
 	.reset_list		= msm8996_usb3phy_reset_l,
 	.num_resets		= ARRAY_SIZE(msm8996_usb3phy_reset_l),
-	.vreg_list		= msm8996_phy_vreg_l,
-	.num_vregs		= ARRAY_SIZE(msm8996_phy_vreg_l),
+	.vreg_list		= qmp_phy_vreg_l,
+	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
 	.regs			= usb3phy_regs_layout,
 
 	.start_ctrl		= SERDES_START | PCS_START,
@@ -870,8 +872,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.num_clks		= ARRAY_SIZE(qmp_v3_phy_clk_l),
 	.reset_list		= msm8996_usb3phy_reset_l,
 	.num_resets		= ARRAY_SIZE(msm8996_usb3phy_reset_l),
-	.vreg_list		= msm8996_phy_vreg_l,
-	.num_vregs		= ARRAY_SIZE(msm8996_phy_vreg_l),
+	.vreg_list		= qmp_phy_vreg_l,
+	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
 	.regs			= qmp_v3_usb3phy_regs_layout,
 
 	.start_ctrl		= SERDES_START | PCS_START,
@@ -883,6 +885,7 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.pwrdn_delay_max	= POWER_DOWN_DELAY_US_MAX,
 
 	.has_phy_dp_com_ctrl	= true,
+	.is_dual_lane_phy	= true,
 	.tx_b_lane_offset	= 0x400,
 	.rx_b_lane_offset	= 0x400,
 };
@@ -903,8 +906,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.num_clks		= ARRAY_SIZE(qmp_v3_phy_clk_l),
 	.reset_list		= msm8996_usb3phy_reset_l,
 	.num_resets		= ARRAY_SIZE(msm8996_usb3phy_reset_l),
-	.vreg_list		= msm8996_phy_vreg_l,
-	.num_vregs		= ARRAY_SIZE(msm8996_phy_vreg_l),
+	.vreg_list		= qmp_phy_vreg_l,
+	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
 	.regs			= qmp_v3_usb3phy_regs_layout,
 
 	.start_ctrl		= SERDES_START | PCS_START,
@@ -1116,12 +1119,12 @@ static int qcom_qmp_phy_init(struct phy *phy)
 	/* Tx, Rx, and PCS configurations */
 	qcom_qmp_phy_configure(tx, cfg->regs, cfg->tx_tbl, cfg->tx_tbl_num);
 	/* Configuration for other LANE for USB-DP combo PHY */
-	if (cfg->has_phy_dp_com_ctrl)
+	if (cfg->is_dual_lane_phy)
 		qcom_qmp_phy_configure(tx + cfg->tx_b_lane_offset, cfg->regs,
 				       cfg->tx_tbl, cfg->tx_tbl_num);
 
 	qcom_qmp_phy_configure(rx, cfg->regs, cfg->rx_tbl, cfg->rx_tbl_num);
-	if (cfg->has_phy_dp_com_ctrl)
+	if (cfg->is_dual_lane_phy)
 		qcom_qmp_phy_configure(rx + cfg->rx_b_lane_offset, cfg->regs,
 				       cfg->rx_tbl, cfg->rx_tbl_num);
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v7 2/4] phy: General struct and field cleanup

[Evan Green]

On Tue, Jun 19, 2018 at 1:38 AM Can Guo <cang@codeaurora.org> wrote:
>
> Move MSM8996 specific PHY vreg list struct name to a genernal one as it is
> used by all PHYs. Add a specific field to handle dual lane situation.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
>

I'm not a PHY expert, so I can't say much about the mechanics or
ramifications of the is_dual_lane_phy change is, but for at least the
sanity of the patch, here's my tag:
Reviewed-by: Evan Green <evgreen@chromium.org>

Re: [PATCH v7 2/4] phy: General struct and field cleanup

[Manu Gautam]

On 6/19/2018 2:06 PM, Can Guo wrote:
> Move MSM8996 specific PHY vreg list struct name to a genernal one as it is
> used by all PHYs. Add a specific field to handle dual lane situation.
> 
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)

Reviewed-by: Manu Gautam <mgautam@codeaurora.org>

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v7 2/4] phy: General struct and field cleanup

[Vivek Gautam]

Hi Can,


On Tue, Jun 19, 2018 at 2:06 PM, Can Guo <cang@codeaurora.org> wrote:
> Move MSM8996 specific PHY vreg list struct name to a genernal one as it is
> used by all PHYs. Add a specific field to handle dual lane situation.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index ccb8578..9be9754 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -649,6 +649,8 @@ struct qmp_phy_cfg {
>
>         /* true, if PHY has a separate DP_COM control block */
>         bool has_phy_dp_com_ctrl;
> +       /* true, if PHY has secondary tx/rx lanes to be configured */
> +       bool is_dual_lane_phy;
>         /* Register offset of secondary tx/rx lanes for USB DP combo PHY */
>         unsigned int tx_b_lane_offset;
>         unsigned int rx_b_lane_offset;
> @@ -758,7 +760,7 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>  };
>
>  /* list of regulators */
> -static const char * const msm8996_phy_vreg_l[] = {
> +static const char * const qmp_phy_vreg_l[] = {
>         "vdda-phy", "vdda-pll",
>  };
>
> @@ -778,8 +780,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>         .num_clks               = ARRAY_SIZE(msm8996_phy_clk_l),
>         .reset_list             = msm8996_pciephy_reset_l,
>         .num_resets             = ARRAY_SIZE(msm8996_pciephy_reset_l),
> -       .vreg_list              = msm8996_phy_vreg_l,
> -       .num_vregs              = ARRAY_SIZE(msm8996_phy_vreg_l),
> +       .vreg_list              = qmp_phy_vreg_l,
> +       .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
>         .regs                   = pciephy_regs_layout,
>
>         .start_ctrl             = PCS_START | PLL_READY_GATE_EN,
> @@ -809,8 +811,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>         .num_clks               = ARRAY_SIZE(msm8996_phy_clk_l),
>         .reset_list             = msm8996_usb3phy_reset_l,
>         .num_resets             = ARRAY_SIZE(msm8996_usb3phy_reset_l),
> -       .vreg_list              = msm8996_phy_vreg_l,
> -       .num_vregs              = ARRAY_SIZE(msm8996_phy_vreg_l),
> +       .vreg_list              = qmp_phy_vreg_l,
> +       .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
>         .regs                   = usb3phy_regs_layout,
>
>         .start_ctrl             = SERDES_START | PCS_START,
> @@ -870,8 +872,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>         .num_clks               = ARRAY_SIZE(qmp_v3_phy_clk_l),
>         .reset_list             = msm8996_usb3phy_reset_l,
>         .num_resets             = ARRAY_SIZE(msm8996_usb3phy_reset_l),
> -       .vreg_list              = msm8996_phy_vreg_l,
> -       .num_vregs              = ARRAY_SIZE(msm8996_phy_vreg_l),
> +       .vreg_list              = qmp_phy_vreg_l,
> +       .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
>         .regs                   = qmp_v3_usb3phy_regs_layout,
>
>         .start_ctrl             = SERDES_START | PCS_START,
> @@ -883,6 +885,7 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>         .pwrdn_delay_max        = POWER_DOWN_DELAY_US_MAX,
>
>         .has_phy_dp_com_ctrl    = true,
> +       .is_dual_lane_phy       = true,
>         .tx_b_lane_offset       = 0x400,
>         .rx_b_lane_offset       = 0x400,
>  };
> @@ -903,8 +906,8 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
>         .num_clks               = ARRAY_SIZE(qmp_v3_phy_clk_l),
>         .reset_list             = msm8996_usb3phy_reset_l,
>         .num_resets             = ARRAY_SIZE(msm8996_usb3phy_reset_l),
> -       .vreg_list              = msm8996_phy_vreg_l,
> -       .num_vregs              = ARRAY_SIZE(msm8996_phy_vreg_l),
> +       .vreg_list              = qmp_phy_vreg_l,
> +       .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
>         .regs                   = qmp_v3_usb3phy_regs_layout,
>
>         .start_ctrl             = SERDES_START | PCS_START,
> @@ -1116,12 +1119,12 @@ static int qcom_qmp_phy_init(struct phy *phy)
>         /* Tx, Rx, and PCS configurations */
>         qcom_qmp_phy_configure(tx, cfg->regs, cfg->tx_tbl, cfg->tx_tbl_num);
>         /* Configuration for other LANE for USB-DP combo PHY */
> -       if (cfg->has_phy_dp_com_ctrl)
> +       if (cfg->is_dual_lane_phy)
>                 qcom_qmp_phy_configure(tx + cfg->tx_b_lane_offset, cfg->regs,
>                                        cfg->tx_tbl, cfg->tx_tbl_num);
>
>         qcom_qmp_phy_configure(rx, cfg->regs, cfg->rx_tbl, cfg->rx_tbl_num);
> -       if (cfg->has_phy_dp_com_ctrl)
> +       if (cfg->is_dual_lane_phy)
>                 qcom_qmp_phy_configure(rx + cfg->rx_b_lane_offset, cfg->regs,
>                                        cfg->rx_tbl, cfg->rx_tbl_num);
>

Thanks for the patch. Looks good to me now.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>

Best regards
Vivek

> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
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QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v7 3/4] phy: Add QMP phy based UFS phy support for sdm845

[Can Guo]

Add UFS PHY support to make SDM845 UFS work with common PHY framework.

Signed-off-by: Can Guo <cang@codeaurora.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 173 +++++++++++++++++++++++++++++++++++-
 drivers/phy/qualcomm/phy-qcom-qmp.h |  15 ++++
 2 files changed, 187 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 9be9754..852792d 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]		= 0x160,
+};
+
 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 +606,83 @@ 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_BIAS_EN_CLKBUFLR_EN, 0x04),
+	QMP_PHY_INIT_CFG(QSERDES_V3_COM_BG_TIMER, 0x0a),
+	QMP_PHY_INIT_CFG(QSERDES_V3_COM_PLL_IVCO, 0x07),
+	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),
+	QMP_PHY_INIT_CFG(QSERDES_V3_TX_RES_CODE_LANE_OFFSET_TX, 0x04),
+	QMP_PHY_INIT_CFG(QSERDES_V3_TX_RES_CODE_LANE_OFFSET_RX, 0x07),
+};
+
+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, 0x1b),
+	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),
+	QMP_PHY_INIT_CFG(QSERDES_V3_RX_RX_MODE_00, 0x59),
+};
+
+static const struct qmp_phy_init_tbl sdm845_ufsphy_pcs_tbl[] = {
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_RX_SIGDET_CTRL2, 0x6e),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_TX_LARGE_AMP_DRV_LVL, 0x0a),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_TX_SMALL_AMP_DRV_LVL, 0x02),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_RX_SYM_RESYNC_CTRL, 0x03),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_TX_MID_TERM_CTRL1, 0x43),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_RX_SIGDET_CTRL1, 0x0f),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_RX_MIN_HIBERN8_TIME, 0x9a),
+	QMP_PHY_INIT_CFG(QPHY_V3_PCS_MULTI_LANE_CTRL1, 0x02),
+};
 
 /* struct qmp_phy_cfg - per-PHY initialization config */
 struct qmp_phy_cfg {
@@ -654,6 +736,9 @@ 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 no separate SW_RESET register */
+	bool no_pcs_sw_reset;
 };
 
 /**
@@ -750,6 +835,10 @@ 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", "ref_aux",
+};
+
 /* list of resets */
 static const char * const msm8996_pciephy_reset_l[] = {
 	"phy", "common", "cfg",
@@ -919,6 +1008,35 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 	.pwrdn_delay_max	= POWER_DOWN_DELAY_US_MAX,
 };
 
+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		= qmp_phy_vreg_l,
+	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
+	.regs			= sdm845_ufsphy_regs_layout,
+
+	.start_ctrl		= SERDES_START,
+	.pwrdn_ctrl		= SW_PWRDN,
+	.mask_pcs_ready		= PCS_READY,
+
+	.is_dual_lane_phy	= true,
+	.tx_b_lane_offset	= 0x400,
+	.rx_b_lane_offset	= 0x400,
+
+	.no_pcs_sw_reset	= true,
+};
+
 static void qcom_qmp_phy_configure(void __iomem *base,
 				   const unsigned int *regs,
 				   const struct qmp_phy_init_tbl tbl[],
@@ -1131,6 +1249,15 @@ static int qcom_qmp_phy_init(struct phy *phy)
 	qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
 
 	/*
+	 * UFS PHY requires the deassert of software reset before serdes start.
+	 * For UFS PHY that has not software reset control bits in its address
+	 * space, it should skip starting serdes here. UFS PHY Serdes shall
+	 * start when UFS explicitly calls PHY power on.
+	 */
+	if ((cfg->type == PHY_TYPE_UFS) && cfg->no_pcs_sw_reset)
+		goto out;
+
+	/*
 	 * Pull out PHY from POWER DOWN state.
 	 * This is active low enable signal to power-down PHY.
 	 */
@@ -1159,6 +1286,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
 	}
 	qmp->phy_initialized = true;
 
+out:
 	return ret;
 
 err_pcs_ready:
@@ -1181,7 +1309,8 @@ 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->no_pcs_sw_reset)
+		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);
@@ -1199,6 +1328,44 @@ static int qcom_qmp_phy_exit(struct phy *phy)
 	return 0;
 }
 
+static int qcom_qmp_phy_poweron(struct phy *phy)
+{
+	struct qmp_phy *qphy = phy_get_drvdata(phy);
+	struct qcom_qmp *qmp = qphy->qmp;
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	void __iomem *pcs = qphy->pcs;
+	void __iomem *status;
+	unsigned int mask, val;
+	int ret = 0;
+
+	if (cfg->type != PHY_TYPE_UFS)
+		return 0;
+
+	/*
+	 * For UFS PHY that has not software reset control, serdes start
+	 * should only happen when UFS driver explicitly calls phy_power_on
+	 * after it deasserts software reset.
+	 */
+	if (cfg->no_pcs_sw_reset && !qmp->phy_initialized &&
+	    (qmp->init_count != 0)) {
+		/* start SerDes and Phy-Coding-Sublayer */
+		qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
+
+		status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
+		mask = cfg->mask_pcs_ready;
+
+		ret = readl_poll_timeout(status, val, !(val & mask), 1,
+					 PHY_INIT_COMPLETE_TIMEOUT);
+		if (ret) {
+			dev_err(qmp->dev, "phy initialization timed-out\n");
+			return ret;
+		}
+		qmp->phy_initialized = true;
+	}
+
+	return ret;
+}
+
 static int qcom_qmp_phy_set_mode(struct phy *phy, enum phy_mode mode)
 {
 	struct qmp_phy *qphy = phy_get_drvdata(phy);
@@ -1428,6 +1595,7 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
 static const struct phy_ops qcom_qmp_phy_gen_ops = {
 	.init		= qcom_qmp_phy_init,
 	.exit		= qcom_qmp_phy_exit,
+	.power_on	= qcom_qmp_phy_poweron,
 	.set_mode	= qcom_qmp_phy_set_mode,
 	.owner		= THIS_MODULE,
 };
@@ -1533,6 +1701,9 @@ 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,
 	},
 	{ },
 };
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.h b/drivers/phy/qualcomm/phy-qcom-qmp.h
index 5d78d43..d201cc3 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
@@ -239,6 +246,8 @@
 #define QPHY_V3_PCS_TXMGN_V3				0x018
 #define QPHY_V3_PCS_TXMGN_V4				0x01c
 #define QPHY_V3_PCS_TXMGN_LS				0x020
+#define QPHY_V3_PCS_TX_LARGE_AMP_DRV_LVL		0x02c
+#define QPHY_V3_PCS_TX_SMALL_AMP_DRV_LVL		0x034
 #define QPHY_V3_PCS_TXDEEMPH_M6DB_V0			0x024
 #define QPHY_V3_PCS_TXDEEMPH_M3P5DB_V0			0x028
 #define QPHY_V3_PCS_TXDEEMPH_M6DB_V1			0x02c
@@ -275,6 +284,12 @@
 #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_RX_SYM_RESYNC_CTRL			0x134
+#define QPHY_V3_PCS_RX_MIN_HIBERN8_TIME			0x138
+#define QPHY_V3_PCS_RX_SIGDET_CTRL1			0x13c
+#define QPHY_V3_PCS_RX_SIGDET_CTRL2			0x140
+#define QPHY_V3_PCS_TX_MID_TERM_CTRL1			0x1bc
+#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
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v7 3/4] phy: Add QMP phy based UFS phy support for sdm845

[Evan Green]

On Tue, Jun 19, 2018 at 1:38 AM Can Guo <cang@codeaurora.org> wrote:
>
> Add UFS PHY support to make SDM845 UFS work with common PHY framework.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 173 +++++++++++++++++++++++++++++++++++-
>  drivers/phy/qualcomm/phy-qcom-qmp.h |  15 ++++
>  2 files changed, 187 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index 9be9754..852792d 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
...
>  static void qcom_qmp_phy_configure(void __iomem *base,
>                                    const unsigned int *regs,
>                                    const struct qmp_phy_init_tbl tbl[],
> @@ -1131,6 +1249,15 @@ static int qcom_qmp_phy_init(struct phy *phy)
>         qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
>
>         /*
> +        * UFS PHY requires the deassert of software reset before serdes start.
> +        * For UFS PHY that has not software reset control bits in its address

This line of the comment is unclear. Maybe:
"For UFS PHYs that do not have software reset control bits, defer
starting serdes until the power on callback"

> +        * space, it should skip starting serdes here. UFS PHY Serdes shall
> +        * start when UFS explicitly calls PHY power on.
> +        */
> +       if ((cfg->type == PHY_TYPE_UFS) && cfg->no_pcs_sw_reset)
> +               goto out;
> +
> +       /*
>          * Pull out PHY from POWER DOWN state.
>          * This is active low enable signal to power-down PHY.
>          */
> @@ -1159,6 +1286,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
>         }
>         qmp->phy_initialized = true;
>
> +out:
>         return ret;
>
>  err_pcs_ready:
> @@ -1181,7 +1309,8 @@ 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->no_pcs_sw_reset)
> +               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);
> @@ -1199,6 +1328,44 @@ static int qcom_qmp_phy_exit(struct phy *phy)
>         return 0;
>  }
>
> +static int qcom_qmp_phy_poweron(struct phy *phy)
> +{
> +       struct qmp_phy *qphy = phy_get_drvdata(phy);
> +       struct qcom_qmp *qmp = qphy->qmp;
> +       const struct qmp_phy_cfg *cfg = qmp->cfg;
> +       void __iomem *pcs = qphy->pcs;
> +       void __iomem *status;
> +       unsigned int mask, val;
> +       int ret = 0;
> +
> +       if (cfg->type != PHY_TYPE_UFS)
> +               return 0;
> +
> +       /*
> +        * For UFS PHY that has not software reset control, serdes start
> +        * should only happen when UFS driver explicitly calls phy_power_on
> +        * after it deasserts software reset.
> +        */
> +       if (cfg->no_pcs_sw_reset && !qmp->phy_initialized &&
> +           (qmp->init_count != 0)) {
> +               /* start SerDes and Phy-Coding-Sublayer */
> +               qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
> +
> +               status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
> +               mask = cfg->mask_pcs_ready;
> +
> +               ret = readl_poll_timeout(status, val, !(val & mask), 1,
> +                                        PHY_INIT_COMPLETE_TIMEOUT);
> +               if (ret) {
> +                       dev_err(qmp->dev, "phy initialization timed-out\n");
> +                       return ret;
> +               }
> +               qmp->phy_initialized = true;
> +       }
> +
> +       return ret;
> +}
> +
>  static int qcom_qmp_phy_set_mode(struct phy *phy, enum phy_mode mode)
>  {
>         struct qmp_phy *qphy = phy_get_drvdata(phy);
> @@ -1428,6 +1595,7 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
>  static const struct phy_ops qcom_qmp_phy_gen_ops = {
>         .init           = qcom_qmp_phy_init,
>         .exit           = qcom_qmp_phy_exit,
> +       .power_on       = qcom_qmp_phy_poweron,

The USB pipe clk discussion earlier this year got me on the lookout
for asymmetric phy init functions. If we're flipping on START_CTRL in
phy_poweron, shouldn't we be flipping it back off in phy_poweroff?
From the comments, it seems like this was done so that some sort of
UFS reset step could happen. Would that sequencing still happen
correctly if the PHY did:

phy_init
phy_power_on
(phy_power_off)
phy_power_on

I'm unsure. Does suspend/resume work?

-Evan

Re: [PATCH v7 3/4] phy: Add QMP phy based UFS phy support for sdm845

[cang]

On 2018-06-28 04:17, Evan Green wrote:
> On Tue, Jun 19, 2018 at 1:38 AM Can Guo <cang@codeaurora.org> wrote:
>> 
>> Add UFS PHY support to make SDM845 UFS work with common PHY framework.
>> 
>> Signed-off-by: Can Guo <cang@codeaurora.org>
>> ---
>>  drivers/phy/qualcomm/phy-qcom-qmp.c | 173 
>> +++++++++++++++++++++++++++++++++++-
>>  drivers/phy/qualcomm/phy-qcom-qmp.h |  15 ++++
>>  2 files changed, 187 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c 
>> b/drivers/phy/qualcomm/phy-qcom-qmp.c
>> index 9be9754..852792d 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> ...
>>  static void qcom_qmp_phy_configure(void __iomem *base,
>>                                    const unsigned int *regs,
>>                                    const struct qmp_phy_init_tbl 
>> tbl[],
>> @@ -1131,6 +1249,15 @@ static int qcom_qmp_phy_init(struct phy *phy)
>>         qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, 
>> cfg->pcs_tbl_num);
>> 
>>         /*
>> +        * UFS PHY requires the deassert of software reset before 
>> serdes start.
>> +        * For UFS PHY that has not software reset control bits in its 
>> address
> 
> This line of the comment is unclear. Maybe:
> "For UFS PHYs that do not have software reset control bits, defer
> starting serdes until the power on callback"
> 

Sure, thank you.

>> +        * space, it should skip starting serdes here. UFS PHY Serdes 
>> shall
>> +        * start when UFS explicitly calls PHY power on.
>> +        */
>> +       if ((cfg->type == PHY_TYPE_UFS) && cfg->no_pcs_sw_reset)
>> +               goto out;
>> +
>> +       /*
>>          * Pull out PHY from POWER DOWN state.
>>          * This is active low enable signal to power-down PHY.
>>          */
>> @@ -1159,6 +1286,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
>>         }
>>         qmp->phy_initialized = true;
>> 
>> +out:
>>         return ret;
>> 
>>  err_pcs_ready:
>> @@ -1181,7 +1309,8 @@ 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->no_pcs_sw_reset)
>> +               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);
>> @@ -1199,6 +1328,44 @@ static int qcom_qmp_phy_exit(struct phy *phy)
>>         return 0;
>>  }
>> 
>> +static int qcom_qmp_phy_poweron(struct phy *phy)
>> +{
>> +       struct qmp_phy *qphy = phy_get_drvdata(phy);
>> +       struct qcom_qmp *qmp = qphy->qmp;
>> +       const struct qmp_phy_cfg *cfg = qmp->cfg;
>> +       void __iomem *pcs = qphy->pcs;
>> +       void __iomem *status;
>> +       unsigned int mask, val;
>> +       int ret = 0;
>> +
>> +       if (cfg->type != PHY_TYPE_UFS)
>> +               return 0;
>> +
>> +       /*
>> +        * For UFS PHY that has not software reset control, serdes 
>> start
>> +        * should only happen when UFS driver explicitly calls 
>> phy_power_on
>> +        * after it deasserts software reset.
>> +        */
>> +       if (cfg->no_pcs_sw_reset && !qmp->phy_initialized &&
>> +           (qmp->init_count != 0)) {
>> +               /* start SerDes and Phy-Coding-Sublayer */
>> +               qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], 
>> cfg->start_ctrl);
>> +
>> +               status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
>> +               mask = cfg->mask_pcs_ready;
>> +
>> +               ret = readl_poll_timeout(status, val, !(val & mask), 
>> 1,
>> +                                        PHY_INIT_COMPLETE_TIMEOUT);
>> +               if (ret) {
>> +                       dev_err(qmp->dev, "phy initialization 
>> timed-out\n");
>> +                       return ret;
>> +               }
>> +               qmp->phy_initialized = true;
>> +       }
>> +
>> +       return ret;
>> +}
>> +
>>  static int qcom_qmp_phy_set_mode(struct phy *phy, enum phy_mode mode)
>>  {
>>         struct qmp_phy *qphy = phy_get_drvdata(phy);
>> @@ -1428,6 +1595,7 @@ static int phy_pipe_clk_register(struct qcom_qmp 
>> *qmp, struct device_node *np)
>>  static const struct phy_ops qcom_qmp_phy_gen_ops = {
>>         .init           = qcom_qmp_phy_init,
>>         .exit           = qcom_qmp_phy_exit,
>> +       .power_on       = qcom_qmp_phy_poweron,
> 
> The USB pipe clk discussion earlier this year got me on the lookout
> for asymmetric phy init functions. If we're flipping on START_CTRL in
> phy_poweron, shouldn't we be flipping it back off in phy_poweroff?
> From the comments, it seems like this was done so that some sort of
> UFS reset step could happen. Would that sequencing still happen
> correctly if the PHY did:
> 
> phy_init
> phy_power_on
> (phy_power_off)
> phy_power_on
> 
> I'm unsure. Does suspend/resume work?
> 
> -Evan

Hi Evan,

Thank you for your comments. As there is no phy_power_off
implemented,phy_power_off actually does nothing.Back to your question,
above sequence does not have issue here with current patch, as the
PHY is initialized already (qmp->phy_initialized is TRUE), the
START_CTRL shall not be set again.

+       if (cfg->no_pcs_sw_reset && !qmp->phy_initialized &&
+           (qmp->init_count != 0)) {

I am working with Vivek and Manu internally to re-fine the patch.
As Manu commented, we want to find a way to remove the poweron
method as it is only used by SDM845 UFS PHY.

- Can

Re: [PATCH v7 3/4] phy: Add QMP phy based UFS phy support for sdm845

[Manu Gautam]

Hi,

On 6/19/2018 2:06 PM, Can Guo wrote:
> +static int qcom_qmp_phy_poweron(struct phy *phy)
> +{
> +	struct qmp_phy *qphy = phy_get_drvdata(phy);
> +	struct qcom_qmp *qmp = qphy->qmp;
> +	const struct qmp_phy_cfg *cfg = qmp->cfg;
> +	void __iomem *pcs = qphy->pcs;
> +	void __iomem *status;
> +	unsigned int mask, val;
> +	int ret = 0;
> +
> +	if (cfg->type != PHY_TYPE_UFS)
> +		return 0;
> +
> +	/*
> +	 * For UFS PHY that has not software reset control, serdes start
> +	 * should only happen when UFS driver explicitly calls phy_power_on
> +	 * after it deasserts software reset.
> +	 */

Instead of relying on UFS glue driver to assert/de-assert PHY
which requires UFS PHY initialization to be split in init() and
poweron(), we can rather register reset_controller from ufs-qcom
driver.
PHY driver can then assert/de-assert as per UFS PHY requirement
in init() function itself and there won't be any need to have
poweron() routine for UFS as init can perform complete PHY
initialization without any dependency on ufs-qcom glue driver.

-Manu

-- 
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[PATCH v7 4/4] dt-bindings: phy-qcom-qmp: Add UFS phy compatible string for sdm845

[Can Guo]

Update the compatible string for UFS QMP PHY on SDM845.

Signed-off-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
index cef8765..930d94c 100644
--- a/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
+++ b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
@@ -11,7 +11,8 @@ Required properties:
 	       "qcom,msm8996-qmp-usb3-phy" for 14nm USB3 phy on msm8996,
 	       "qcom,qmp-v3-usb3-phy" for USB3 QMP V3 phy,
 	       "qcom,sdm845-qmp-usb3-phy" for USB3 QMP V3 phy on sdm845,
-	       "qcom,sdm845-qmp-usb3-uni-phy" for USB3 QMP V3 UNI phy on sdm845.
+	       "qcom,sdm845-qmp-usb3-uni-phy" for USB3 QMP V3 UNI phy on sdm845,
+	       "qcom,sdm845-qmp-ufs-phy" for UFS QMP phy on sdm845.
 
  - reg: offset and length of register set for PHY's common serdes block.
 
@@ -29,6 +30,7 @@ Required properties:
 		"aux" for phy aux clock,
 		"ref" for 19.2 MHz ref clk,
 		"com_aux" for phy common block aux clock,
+		"ref_aux" for phy reference aux clock,
 		For "qcom,msm8996-qmp-pcie-phy" must contain:
 			"aux", "cfg_ahb", "ref".
 		For "qcom,msm8996-qmp-usb3-phy" must contain:
-- 
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