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scsi: ufs: add quirk to enable host controller without hce
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: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -3364,6 +3364,52 @@ static int ufshcd_dme_link_startup(struct ufs_hba *hba)
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"dme-link-startup: error code %d\n", ret);
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return ret;
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}
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/**
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* ufshcd_dme_reset - UIC command for DME_RESET
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* @hba: per adapter instance
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*
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* DME_RESET command is issued in order to reset UniPro stack.
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* This function now deal with cold reset.
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int ufshcd_dme_reset(struct ufs_hba *hba)
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{
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struct uic_command uic_cmd = {0};
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int ret;
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uic_cmd.command = UIC_CMD_DME_RESET;
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ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
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if (ret)
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dev_err(hba->dev,
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"dme-reset: error code %d\n", ret);
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return ret;
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}
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/**
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* ufshcd_dme_enable - UIC command for DME_ENABLE
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* @hba: per adapter instance
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*
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* DME_ENABLE command is issued in order to enable UniPro stack.
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int ufshcd_dme_enable(struct ufs_hba *hba)
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{
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struct uic_command uic_cmd = {0};
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int ret;
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uic_cmd.command = UIC_CMD_DME_ENABLE;
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ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
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if (ret)
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dev_err(hba->dev,
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"dme-reset: error code %d\n", ret);
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return ret;
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}
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static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
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{
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@ -4022,7 +4068,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
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}
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/**
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* ufshcd_hba_enable - initialize the controller
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* ufshcd_hba_execute_hce - initialize the controller
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* @hba: per adapter instance
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*
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* The controller resets itself and controller firmware initialization
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@ -4031,7 +4077,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int ufshcd_hba_enable(struct ufs_hba *hba)
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static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
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{
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int retry;
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@ -4086,6 +4132,31 @@ static int ufshcd_hba_enable(struct ufs_hba *hba)
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return 0;
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}
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static int ufshcd_hba_enable(struct ufs_hba *hba)
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{
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int ret;
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if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
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ufshcd_set_link_off(hba);
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ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
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/* enable UIC related interrupts */
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ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
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ret = ufshcd_dme_reset(hba);
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if (!ret) {
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ret = ufshcd_dme_enable(hba);
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if (!ret)
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ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
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if (ret)
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dev_err(hba->dev,
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"Host controller enable failed with non-hce\n");
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}
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} else {
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ret = ufshcd_hba_execute_hce(hba);
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}
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return ret;
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}
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static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
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{
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int tx_lanes, i, err = 0;
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@ -606,6 +606,11 @@ struct ufs_hba {
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*/
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#define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR 0x200
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/*
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* This quirks needs to be enabled if host controller cannot be
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* enabled via HCE register.
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*/
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#define UFSHCI_QUIRK_BROKEN_HCE 0x400
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unsigned int quirks; /* Deviations from standard UFSHCI spec. */
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/* Device deviations from standard UFS device spec. */
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