Hi, Can Guo
Actually, we already have DME_RESET, this is not enough for Qualcomm host?
Thanks,
//Bean
>
> Some UFS host controllers need their specific implementations of resetting to
> get them into a good state. Provide a new vops to allow the platform driver to
> implement this own reset operation.
>
> Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
> ---
> drivers/scsi/ufs/ufshcd.c | 16 ++++++++++++++++ drivers/scsi/ufs/ufshcd.h | 10
> ++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index
> c28c144..161e3c4 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -3859,6 +3859,14 @@ static int ufshcd_link_recovery(struct ufs_hba *hba)
> ufshcd_set_eh_in_progress(hba);
> spin_unlock_irqrestore(hba->host->host_lock, flags);
>
> + ret = ufshcd_vops_full_reset(hba);
> + if (ret)
> + dev_warn(hba->dev, "%s: full reset returned %d\n",
> + __func__, ret);
> +
> + /* Reset the attached device */
> + ufshcd_vops_device_reset(hba);
> +
> ret = ufshcd_host_reset_and_restore(hba);
>
> spin_lock_irqsave(hba->host->host_lock, flags); @@ -6241,6 +6249,11
> @@ static int ufshcd_reset_and_restore(struct ufs_hba *hba)
> int retries = MAX_HOST_RESET_RETRIES;
>
> do {
> + err = ufshcd_vops_full_reset(hba);
> + if (err)
> + dev_warn(hba->dev, "%s: full reset returned %d\n",
> + __func__, err);
> +
> /* Reset the attached device */
> ufshcd_vops_device_reset(hba);
>
> @@ -8384,6 +8397,9 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem
> *mmio_base, unsigned int irq)
> goto exit_gating;
> }
>
> + /* Reset controller to power on reset (POR) state */
> + ufshcd_vops_full_reset(hba);
> +
> /* Reset the attached device */
> ufshcd_vops_device_reset(hba);
>
> diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index
> e0fe247..253b9ea 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -296,6 +296,8 @@ struct ufs_pwr_mode_info {
> * @apply_dev_quirks: called to apply device specific quirks
> * @suspend: called during host controller PM callback
> * @resume: called during host controller PM callback
> + * @full_reset: called for handling variant specific implementations of
> + * resetting the hci
> * @dbg_register_dump: used to dump controller debug information
> * @phy_initialization: used to initialize phys
> * @device_reset: called to issue a reset pulse on the UFS device @@ -325,6
> +327,7 @@ struct ufs_hba_variant_ops {
> int (*apply_dev_quirks)(struct ufs_hba *);
> int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
> int (*resume)(struct ufs_hba *, enum ufs_pm_op);
> + int (*full_reset)(struct ufs_hba *hba);
> void (*dbg_register_dump)(struct ufs_hba *hba);
> int (*phy_initialization)(struct ufs_hba *);
> void (*device_reset)(struct ufs_hba *hba);
> @@ -1076,6 +1079,13 @@ static inline int ufshcd_vops_resume(struct ufs_hba
> *hba, enum ufs_pm_op op)
> return 0;
> }
>
> +static inline int ufshcd_vops_full_reset(struct ufs_hba *hba) {
> + if (hba->vops && hba->vops->full_reset)
> + return hba->vops->full_reset(hba);
> + return 0;
> +}
> +
> static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba) {
> if (hba->vops && hba->vops->dbg_register_dump)
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
