1. Patchew
  2. linux
  3. [PATCH V5 0/6] scsi: ufs: qcom: Align programming sequence as per HW spec
  4. View patch

[PATCH V5 2/6] scsi: ufs: qcom: Configure PA_VS_CORE_CLK_40NS_CYCLES for Unipro core clk

Nitin Rawat posted 6 patches 2 years, 3 months ago
There is a newer version of this series
[PATCH V5 2/6] scsi: ufs: qcom: Configure PA_VS_CORE_CLK_40NS_CYCLES for Unipro core clk
Posted by Nitin Rawat 2 years, 3 months ago 
For Qualcomm UFS controller V4.0 and above PA_VS_CORE_CLK_40NS_CYCLES
attribute needs to be programmed with frequency of unipro core clk.
Hence Configure PA_VS_CORE_CLK_40NS_CYCLES attribute for Unipro core clk.

Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 45 ++++++++++++++++++++++++++++---------
 drivers/ufs/host/ufs-qcom.h |  2 ++
 2 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 1108b0cd43b3..abc0e7f7d1b0 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -93,8 +93,9 @@ static const struct __ufs_qcom_bw_table {
 static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS];

 static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
-static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
-						       u32 clk_cycles);
+static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
+					u32 clk_cycles,
+					u32 clk_40ns_cycles);

 static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
 {
@@ -690,8 +691,7 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
 			 * set unipro core clock cycles to 150 & clear clock
 			 * divider
 			 */
-			err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba,
-									  150);
+			err = ufs_qcom_set_core_clk_ctrl(hba, 150, 6);

 		/*
 		 * Some UFS devices (and may be host) have issues if LCC is
@@ -1296,12 +1296,13 @@ static void ufs_qcom_exit(struct ufs_hba *hba)
 	phy_exit(host->generic_phy);
 }

-static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
-						       u32 clk_1us_cycles)
+static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
+					u32 clk_1us_cycles,
+					u32 clk_40ns_cycles)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
 	u32 mask = DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK;
-	u32 core_clk_ctrl_reg;
+	u32 core_clk_ctrl_reg, reg;
 	u32 offset = 0;
 	int err;

@@ -1326,9 +1327,33 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
 	/* Clear CORE_CLK_DIV_EN */
 	core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;

-	return ufshcd_dme_set(hba,
+	err = ufshcd_dme_set(hba,
 			    UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
 			    core_clk_ctrl_reg);
+	/*
+	 * UFS host controller V4.0.0 onwards needs to program
+	 * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed
+	 * frequency of unipro core clk of UFS host controller.
+	 */
+	if (!err && (host->hw_ver.major >= 4)) {
+		if (clk_40ns_cycles > PA_VS_CORE_CLK_40NS_CYCLES_MASK)
+			return -EINVAL;
+
+		err = ufshcd_dme_get(hba,
+				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
+				     &reg);
+		if (err)
+			return err;
+
+		reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK;
+		reg |= clk_40ns_cycles;
+
+		err = ufshcd_dme_set(hba,
+				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
+				     reg);
+	}
+
+	return err;
 }

 static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
@@ -1345,7 +1370,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
 		return 0;

 	/* set unipro core clock cycles to 150 and clear clock divider */
-	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 150);
+	return ufs_qcom_set_core_clk_ctrl(hba, 150, 6);
 }

 static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
@@ -1381,7 +1406,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba)
 		return 0;

 	/* set unipro core clock cycles to 75 and clear clock divider */
-	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 75);
+	return ufs_qcom_set_core_clk_ctrl(hba, 75, 3);
 }

 static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index a829296e11bb..325f08aca260 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -133,6 +133,8 @@ enum {
 #define MAX_CORE_CLK_1US_CYCLES_OFFSET_V4	0x10
 #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT		BIT(8)
 #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK	0xFF
+#define PA_VS_CORE_CLK_40NS_CYCLES	0x9007
+#define PA_VS_CORE_CLK_40NS_CYCLES_MASK	0x3F

 static inline void
 ufs_qcom_get_controller_revision(struct ufs_hba *hba,
--
2.17.1
Re: [PATCH V5 2/6] scsi: ufs: qcom: Configure PA_VS_CORE_CLK_40NS_CYCLES for Unipro core clk
Posted by Manivannan Sadhasivam 2 years, 3 months ago 
On Wed, Aug 23, 2023 at 09:14:09PM +0530, Nitin Rawat wrote:
> For Qualcomm UFS controller V4.0 and above PA_VS_CORE_CLK_40NS_CYCLES
> attribute needs to be programmed with frequency of unipro core clk.
> Hence Configure PA_VS_CORE_CLK_40NS_CYCLES attribute for Unipro core clk.
> 

Same comment applies as patch 1.

- Mani

> Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
> Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
> Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
> ---
>  drivers/ufs/host/ufs-qcom.c | 45 ++++++++++++++++++++++++++++---------
>  drivers/ufs/host/ufs-qcom.h |  2 ++
>  2 files changed, 37 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 1108b0cd43b3..abc0e7f7d1b0 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -93,8 +93,9 @@ static const struct __ufs_qcom_bw_table {
>  static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS];
> 
>  static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
> -static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
> -						       u32 clk_cycles);
> +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
> +					u32 clk_cycles,
> +					u32 clk_40ns_cycles);
> 
>  static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
>  {
> @@ -690,8 +691,7 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
>  			 * set unipro core clock cycles to 150 & clear clock
>  			 * divider
>  			 */
> -			err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba,
> -									  150);
> +			err = ufs_qcom_set_core_clk_ctrl(hba, 150, 6);
> 
>  		/*
>  		 * Some UFS devices (and may be host) have issues if LCC is
> @@ -1296,12 +1296,13 @@ static void ufs_qcom_exit(struct ufs_hba *hba)
>  	phy_exit(host->generic_phy);
>  }
> 
> -static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
> -						       u32 clk_1us_cycles)
> +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
> +					u32 clk_1us_cycles,
> +					u32 clk_40ns_cycles)
>  {
>  	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
>  	u32 mask = DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK;
> -	u32 core_clk_ctrl_reg;
> +	u32 core_clk_ctrl_reg, reg;
>  	u32 offset = 0;
>  	int err;
> 
> @@ -1326,9 +1327,33 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
>  	/* Clear CORE_CLK_DIV_EN */
>  	core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;
> 
> -	return ufshcd_dme_set(hba,
> +	err = ufshcd_dme_set(hba,
>  			    UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
>  			    core_clk_ctrl_reg);
> +	/*
> +	 * UFS host controller V4.0.0 onwards needs to program
> +	 * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed
> +	 * frequency of unipro core clk of UFS host controller.
> +	 */
> +	if (!err && (host->hw_ver.major >= 4)) {
> +		if (clk_40ns_cycles > PA_VS_CORE_CLK_40NS_CYCLES_MASK)
> +			return -EINVAL;
> +
> +		err = ufshcd_dme_get(hba,
> +				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
> +				     &reg);
> +		if (err)
> +			return err;
> +
> +		reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK;
> +		reg |= clk_40ns_cycles;
> +
> +		err = ufshcd_dme_set(hba,
> +				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
> +				     reg);
> +	}
> +
> +	return err;
>  }
> 
>  static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
> @@ -1345,7 +1370,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
>  		return 0;
> 
>  	/* set unipro core clock cycles to 150 and clear clock divider */
> -	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 150);
> +	return ufs_qcom_set_core_clk_ctrl(hba, 150, 6);
>  }
> 
>  static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
> @@ -1381,7 +1406,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba)
>  		return 0;
> 
>  	/* set unipro core clock cycles to 75 and clear clock divider */
> -	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 75);
> +	return ufs_qcom_set_core_clk_ctrl(hba, 75, 3);
>  }
> 
>  static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
> diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
> index a829296e11bb..325f08aca260 100644
> --- a/drivers/ufs/host/ufs-qcom.h
> +++ b/drivers/ufs/host/ufs-qcom.h
> @@ -133,6 +133,8 @@ enum {
>  #define MAX_CORE_CLK_1US_CYCLES_OFFSET_V4	0x10
>  #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT		BIT(8)
>  #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK	0xFF
> +#define PA_VS_CORE_CLK_40NS_CYCLES	0x9007
> +#define PA_VS_CORE_CLK_40NS_CYCLES_MASK	0x3F
> 
>  static inline void
>  ufs_qcom_get_controller_revision(struct ufs_hba *hba,
> --
> 2.17.1
> 

-- 
மணிவண்ணன் சதாசிவம்
Re: [PATCH V5 2/6] scsi: ufs: qcom: Configure PA_VS_CORE_CLK_40NS_CYCLES for Unipro core clk
Posted by Nitin Rawat 2 years, 3 months ago 

On 8/28/2023 1:10 PM, Manivannan Sadhasivam wrote:
> On Wed, Aug 23, 2023 at 09:14:09PM +0530, Nitin Rawat wrote:
>> For Qualcomm UFS controller V4.0 and above PA_VS_CORE_CLK_40NS_CYCLES
>> attribute needs to be programmed with frequency of unipro core clk.
>> Hence Configure PA_VS_CORE_CLK_40NS_CYCLES attribute for Unipro core clk.
>>
> 
> Same comment applies as patch 1.
> 
> - Mani

Sure...Will take care of this in next patchset. Thanks

-Nitin


> 
>> Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
>> Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com>
>> Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
>> ---
>>   drivers/ufs/host/ufs-qcom.c | 45 ++++++++++++++++++++++++++++---------
>>   drivers/ufs/host/ufs-qcom.h |  2 ++
>>   2 files changed, 37 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
>> index 1108b0cd43b3..abc0e7f7d1b0 100644
>> --- a/drivers/ufs/host/ufs-qcom.c
>> +++ b/drivers/ufs/host/ufs-qcom.c
>> @@ -93,8 +93,9 @@ static const struct __ufs_qcom_bw_table {
>>   static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS];
>>
>>   static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
>> -static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
>> -						       u32 clk_cycles);
>> +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
>> +					u32 clk_cycles,
>> +					u32 clk_40ns_cycles);
>>
>>   static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
>>   {
>> @@ -690,8 +691,7 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
>>   			 * set unipro core clock cycles to 150 & clear clock
>>   			 * divider
>>   			 */
>> -			err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba,
>> -									  150);
>> +			err = ufs_qcom_set_core_clk_ctrl(hba, 150, 6);
>>
>>   		/*
>>   		 * Some UFS devices (and may be host) have issues if LCC is
>> @@ -1296,12 +1296,13 @@ static void ufs_qcom_exit(struct ufs_hba *hba)
>>   	phy_exit(host->generic_phy);
>>   }
>>
>> -static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
>> -						       u32 clk_1us_cycles)
>> +static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba,
>> +					u32 clk_1us_cycles,
>> +					u32 clk_40ns_cycles)
>>   {
>>   	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
>>   	u32 mask = DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK;
>> -	u32 core_clk_ctrl_reg;
>> +	u32 core_clk_ctrl_reg, reg;
>>   	u32 offset = 0;
>>   	int err;
>>
>> @@ -1326,9 +1327,33 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
>>   	/* Clear CORE_CLK_DIV_EN */
>>   	core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;
>>
>> -	return ufshcd_dme_set(hba,
>> +	err = ufshcd_dme_set(hba,
>>   			    UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
>>   			    core_clk_ctrl_reg);
>> +	/*
>> +	 * UFS host controller V4.0.0 onwards needs to program
>> +	 * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed
>> +	 * frequency of unipro core clk of UFS host controller.
>> +	 */
>> +	if (!err && (host->hw_ver.major >= 4)) {
>> +		if (clk_40ns_cycles > PA_VS_CORE_CLK_40NS_CYCLES_MASK)
>> +			return -EINVAL;
>> +
>> +		err = ufshcd_dme_get(hba,
>> +				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
>> +				     &reg);
>> +		if (err)
>> +			return err;
>> +
>> +		reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK;
>> +		reg |= clk_40ns_cycles;
>> +
>> +		err = ufshcd_dme_set(hba,
>> +				     UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES),
>> +				     reg);
>> +	}
>> +
>> +	return err;
>>   }
>>
>>   static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
>> @@ -1345,7 +1370,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
>>   		return 0;
>>
>>   	/* set unipro core clock cycles to 150 and clear clock divider */
>> -	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 150);
>> +	return ufs_qcom_set_core_clk_ctrl(hba, 150, 6);
>>   }
>>
>>   static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
>> @@ -1381,7 +1406,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba)
>>   		return 0;
>>
>>   	/* set unipro core clock cycles to 75 and clear clock divider */
>> -	return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 75);
>> +	return ufs_qcom_set_core_clk_ctrl(hba, 75, 3);
>>   }
>>
>>   static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
>> diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
>> index a829296e11bb..325f08aca260 100644
>> --- a/drivers/ufs/host/ufs-qcom.h
>> +++ b/drivers/ufs/host/ufs-qcom.h
>> @@ -133,6 +133,8 @@ enum {
>>   #define MAX_CORE_CLK_1US_CYCLES_OFFSET_V4	0x10
>>   #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT		BIT(8)
>>   #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK	0xFF
>> +#define PA_VS_CORE_CLK_40NS_CYCLES	0x9007
>> +#define PA_VS_CORE_CLK_40NS_CYCLES_MASK	0x3F
>>
>>   static inline void
>>   ufs_qcom_get_controller_revision(struct ufs_hba *hba,
>> --
>> 2.17.1
>>
>

Patchew 2.1-devel-b67e4c2

© 2016 - 2025 Red Hat, Inc.