diff mbox series

[v6,03/10] scsi: ufs: add quirk to enable host controller without hce

Message ID 20200417175944.47189-4-alim.akhtar@samsung.com (mailing list archive)
State Not Applicable
Headers show
Series exynos-ufs: Add support for UFS HCI | expand

Commit Message

Alim Akhtar April 17, 2020, 5:59 p.m. UTC 
Some host controllers don't support host controller enable via HCE.

Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
 drivers/scsi/ufs/ufshcd.c | 76 +++++++++++++++++++++++++++++++++++++--
 drivers/scsi/ufs/ufshcd.h |  6 ++++
 2 files changed, 80 insertions(+), 2 deletions(-)

Comments

Avri Altman April 20, 2020, 7:14 a.m. UTC | #1 
> 
> Some host controllers don't support host controller enable via HCE.
> 
> Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Can Guo April 21, 2020, 5:59 a.m. UTC | #2 
On 2020-04-18 01:59, Alim Akhtar wrote:
> Some host controllers don't support host controller enable via HCE.
> 
> Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>

They are back again finally...

Reviewd-by: Can Guo <cang@codeaurora.org>

> ---
>  drivers/scsi/ufs/ufshcd.c | 76 +++++++++++++++++++++++++++++++++++++--
>  drivers/scsi/ufs/ufshcd.h |  6 ++++
>  2 files changed, 80 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 0e9704da58bd..ee30ed6cc805 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -3534,6 +3534,52 @@ static int ufshcd_dme_link_startup(struct 
> ufs_hba *hba)
>  			"dme-link-startup: error code %d\n", ret);
>  	return ret;
>  }
> +/**
> + * ufshcd_dme_reset - UIC command for DME_RESET
> + * @hba: per adapter instance
> + *
> + * DME_RESET command is issued in order to reset UniPro stack.
> + * This function now deal with cold reset.
> + *
> + * Returns 0 on success, non-zero value on failure
> + */
> +static int ufshcd_dme_reset(struct ufs_hba *hba)
> +{
> +	struct uic_command uic_cmd = {0};
> +	int ret;
> +
> +	uic_cmd.command = UIC_CMD_DME_RESET;
> +
> +	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
> +	if (ret)
> +		dev_err(hba->dev,
> +			"dme-reset: error code %d\n", ret);
> +
> +	return ret;
> +}
> +
> +/**
> + * ufshcd_dme_enable - UIC command for DME_ENABLE
> + * @hba: per adapter instance
> + *
> + * DME_ENABLE command is issued in order to enable UniPro stack.
> + *
> + * Returns 0 on success, non-zero value on failure
> + */
> +static int ufshcd_dme_enable(struct ufs_hba *hba)
> +{
> +	struct uic_command uic_cmd = {0};
> +	int ret;
> +
> +	uic_cmd.command = UIC_CMD_DME_ENABLE;
> +
> +	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
> +	if (ret)
> +		dev_err(hba->dev,
> +			"dme-reset: error code %d\n", ret);
> +
> +	return ret;
> +}
> 
>  static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba 
> *hba)
>  {
> @@ -4251,7 +4297,7 @@ static inline void ufshcd_hba_stop(struct
> ufs_hba *hba, bool can_sleep)
>  }
> 
>  /**
> - * ufshcd_hba_enable - initialize the controller
> + * ufshcd_hba_execute_hce - initialize the controller
>   * @hba: per adapter instance
>   *
>   * The controller resets itself and controller firmware initialization
> @@ -4260,7 +4306,7 @@ static inline void ufshcd_hba_stop(struct
> ufs_hba *hba, bool can_sleep)
>   *
>   * Returns 0 on success, non-zero value on failure
>   */
> -int ufshcd_hba_enable(struct ufs_hba *hba)
> +static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
>  {
>  	int retry;
> 
> @@ -4308,6 +4354,32 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
> 
>  	return 0;
>  }
> +
> +int ufshcd_hba_enable(struct ufs_hba *hba)
> +{
> +	int ret;
> +
> +	if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
> +		ufshcd_set_link_off(hba);
> +		ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
> +
> +		/* enable UIC related interrupts */
> +		ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
> +		ret = ufshcd_dme_reset(hba);
> +		if (!ret) {
> +			ret = ufshcd_dme_enable(hba);
> +			if (!ret)
> +				ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
> +			if (ret)
> +				dev_err(hba->dev,
> +					"Host controller enable failed with non-hce\n");
> +		}
> +	} else {
> +		ret = ufshcd_hba_execute_hce(hba);
> +	}
> +
> +	return ret;
> +}
>  EXPORT_SYMBOL_GPL(ufshcd_hba_enable);
> 
>  static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> index 53096642f9a8..f8d08cb9caf7 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -529,6 +529,12 @@ enum ufshcd_quirks {
>  	 * that the interrupt aggregation timer and counter are reset by s/w.
>  	 */
>  	UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR		= 1 << 7,
> +
> +	/*
> +	 * This quirks needs to be enabled if host controller cannot be
> +	 * enabled via HCE register.
> +	 */
> +	UFSHCI_QUIRK_BROKEN_HCE				= 1 << 8,
>  };
> 
>  enum ufshcd_caps {
Can Guo April 21, 2020, 6 a.m. UTC | #3 
On 2020-04-21 13:59, Can Guo wrote:
> On 2020-04-18 01:59, Alim Akhtar wrote:
>> Some host controllers don't support host controller enable via HCE.
>> 
>> Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
>> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
> 
> They are back again finally...
> 
> Reviewd-by: Can Guo <cang@codeaurora.org>

Reviewed-by: Can Guo <cang@codeaurora.org>

> 
>> ---
>>  drivers/scsi/ufs/ufshcd.c | 76 
>> +++++++++++++++++++++++++++++++++++++--
>>  drivers/scsi/ufs/ufshcd.h |  6 ++++
>>  2 files changed, 80 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
>> index 0e9704da58bd..ee30ed6cc805 100644
>> --- a/drivers/scsi/ufs/ufshcd.c
>> +++ b/drivers/scsi/ufs/ufshcd.c
>> @@ -3534,6 +3534,52 @@ static int ufshcd_dme_link_startup(struct 
>> ufs_hba *hba)
>>  			"dme-link-startup: error code %d\n", ret);
>>  	return ret;
>>  }
>> +/**
>> + * ufshcd_dme_reset - UIC command for DME_RESET
>> + * @hba: per adapter instance
>> + *
>> + * DME_RESET command is issued in order to reset UniPro stack.
>> + * This function now deal with cold reset.
>> + *
>> + * Returns 0 on success, non-zero value on failure
>> + */
>> +static int ufshcd_dme_reset(struct ufs_hba *hba)
>> +{
>> +	struct uic_command uic_cmd = {0};
>> +	int ret;
>> +
>> +	uic_cmd.command = UIC_CMD_DME_RESET;
>> +
>> +	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
>> +	if (ret)
>> +		dev_err(hba->dev,
>> +			"dme-reset: error code %d\n", ret);
>> +
>> +	return ret;
>> +}
>> +
>> +/**
>> + * ufshcd_dme_enable - UIC command for DME_ENABLE
>> + * @hba: per adapter instance
>> + *
>> + * DME_ENABLE command is issued in order to enable UniPro stack.
>> + *
>> + * Returns 0 on success, non-zero value on failure
>> + */
>> +static int ufshcd_dme_enable(struct ufs_hba *hba)
>> +{
>> +	struct uic_command uic_cmd = {0};
>> +	int ret;
>> +
>> +	uic_cmd.command = UIC_CMD_DME_ENABLE;
>> +
>> +	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
>> +	if (ret)
>> +		dev_err(hba->dev,
>> +			"dme-reset: error code %d\n", ret);
>> +
>> +	return ret;
>> +}
>> 
>>  static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba 
>> *hba)
>>  {
>> @@ -4251,7 +4297,7 @@ static inline void ufshcd_hba_stop(struct
>> ufs_hba *hba, bool can_sleep)
>>  }
>> 
>>  /**
>> - * ufshcd_hba_enable - initialize the controller
>> + * ufshcd_hba_execute_hce - initialize the controller
>>   * @hba: per adapter instance
>>   *
>>   * The controller resets itself and controller firmware 
>> initialization
>> @@ -4260,7 +4306,7 @@ static inline void ufshcd_hba_stop(struct
>> ufs_hba *hba, bool can_sleep)
>>   *
>>   * Returns 0 on success, non-zero value on failure
>>   */
>> -int ufshcd_hba_enable(struct ufs_hba *hba)
>> +static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
>>  {
>>  	int retry;
>> 
>> @@ -4308,6 +4354,32 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
>> 
>>  	return 0;
>>  }
>> +
>> +int ufshcd_hba_enable(struct ufs_hba *hba)
>> +{
>> +	int ret;
>> +
>> +	if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
>> +		ufshcd_set_link_off(hba);
>> +		ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
>> +
>> +		/* enable UIC related interrupts */
>> +		ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
>> +		ret = ufshcd_dme_reset(hba);
>> +		if (!ret) {
>> +			ret = ufshcd_dme_enable(hba);
>> +			if (!ret)
>> +				ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
>> +			if (ret)
>> +				dev_err(hba->dev,
>> +					"Host controller enable failed with non-hce\n");
>> +		}
>> +	} else {
>> +		ret = ufshcd_hba_execute_hce(hba);
>> +	}
>> +
>> +	return ret;
>> +}
>>  EXPORT_SYMBOL_GPL(ufshcd_hba_enable);
>> 
>>  static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
>> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
>> index 53096642f9a8..f8d08cb9caf7 100644
>> --- a/drivers/scsi/ufs/ufshcd.h
>> +++ b/drivers/scsi/ufs/ufshcd.h
>> @@ -529,6 +529,12 @@ enum ufshcd_quirks {
>>  	 * that the interrupt aggregation timer and counter are reset by 
>> s/w.
>>  	 */
>>  	UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR		= 1 << 7,
>> +
>> +	/*
>> +	 * This quirks needs to be enabled if host controller cannot be
>> +	 * enabled via HCE register.
>> +	 */
>> +	UFSHCI_QUIRK_BROKEN_HCE				= 1 << 8,
>>  };
>> 
>>  enum ufshcd_caps {
diff mbox series

Patch

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0e9704da58bd..ee30ed6cc805 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -3534,6 +3534,52 @@  static int ufshcd_dme_link_startup(struct ufs_hba *hba)
 			"dme-link-startup: error code %d\n", ret);
 	return ret;
 }
+/**
+ * ufshcd_dme_reset - UIC command for DME_RESET
+ * @hba: per adapter instance
+ *
+ * DME_RESET command is issued in order to reset UniPro stack.
+ * This function now deal with cold reset.
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_dme_reset(struct ufs_hba *hba)
+{
+	struct uic_command uic_cmd = {0};
+	int ret;
+
+	uic_cmd.command = UIC_CMD_DME_RESET;
+
+	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+	if (ret)
+		dev_err(hba->dev,
+			"dme-reset: error code %d\n", ret);
+
+	return ret;
+}
+
+/**
+ * ufshcd_dme_enable - UIC command for DME_ENABLE
+ * @hba: per adapter instance
+ *
+ * DME_ENABLE command is issued in order to enable UniPro stack.
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_dme_enable(struct ufs_hba *hba)
+{
+	struct uic_command uic_cmd = {0};
+	int ret;
+
+	uic_cmd.command = UIC_CMD_DME_ENABLE;
+
+	ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+	if (ret)
+		dev_err(hba->dev,
+			"dme-reset: error code %d\n", ret);
+
+	return ret;
+}
 
 static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
 {
@@ -4251,7 +4297,7 @@  static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
 }
 
 /**
- * ufshcd_hba_enable - initialize the controller
+ * ufshcd_hba_execute_hce - initialize the controller
  * @hba: per adapter instance
  *
  * The controller resets itself and controller firmware initialization
@@ -4260,7 +4306,7 @@  static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
  *
  * Returns 0 on success, non-zero value on failure
  */
-int ufshcd_hba_enable(struct ufs_hba *hba)
+static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
 {
 	int retry;
 
@@ -4308,6 +4354,32 @@  int ufshcd_hba_enable(struct ufs_hba *hba)
 
 	return 0;
 }
+
+int ufshcd_hba_enable(struct ufs_hba *hba)
+{
+	int ret;
+
+	if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
+		ufshcd_set_link_off(hba);
+		ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
+
+		/* enable UIC related interrupts */
+		ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
+		ret = ufshcd_dme_reset(hba);
+		if (!ret) {
+			ret = ufshcd_dme_enable(hba);
+			if (!ret)
+				ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
+			if (ret)
+				dev_err(hba->dev,
+					"Host controller enable failed with non-hce\n");
+		}
+	} else {
+		ret = ufshcd_hba_execute_hce(hba);
+	}
+
+	return ret;
+}
 EXPORT_SYMBOL_GPL(ufshcd_hba_enable);
 
 static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 53096642f9a8..f8d08cb9caf7 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -529,6 +529,12 @@  enum ufshcd_quirks {
 	 * that the interrupt aggregation timer and counter are reset by s/w.
 	 */
 	UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR		= 1 << 7,
+
+	/*
+	 * This quirks needs to be enabled if host controller cannot be
+	 * enabled via HCE register.
+	 */
+	UFSHCI_QUIRK_BROKEN_HCE				= 1 << 8,
 };
 
 enum ufshcd_caps {