scsi: ufs-msm: remove unnecessary callbacks of generic PHY framework

In this change unnecessary callbacks of the generic PHY framework
are removed and instead we call the required operations directly in
the driver.
The callbacks that were removed are:
phy_suspend(), phy_resume() and advertise_quirks()

In addition, one specific callback of the generic PHY is added:
restore_configuration() as complementary callback of save_configuration().

Change-Id: Iaf2be3ebff7a9978adae50c3f2617714106c40ac
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>

drivers/scsi/ufs/ufs-msm-phy-qmp-20nm.c

@@ -53,6 +53,13 @@ static int ufs_msm_phy_qmp_20nm_phy_calibrate(struct ufs_msm_phy *ufs_msm_phy)
 	return err;
 }
 
+static
+void ufs_msm_phy_qmp_20nm_advertise_quirks(struct ufs_msm_phy *phy_common)
+{
+	phy_common->quirks =
+		MSM_UFS_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE;
+}
+
 static int ufs_msm_phy_qmp_20nm_init(struct phy *generic_phy)
 {
 	struct ufs_msm_phy_qmp_20nm *phy = phy_get_drvdata(generic_phy);
@@ -67,9 +74,13 @@ static int ufs_msm_phy_qmp_20nm_init(struct phy *generic_phy)
 	}
 
 	err = ufs_msm_phy_init_vregulators(generic_phy, phy_common);
-	if (err)
+	if (err) {
 		dev_err(phy_common->dev, "%s: ufs_msm_phy_init_vregulators() failed %d\n",
 			__func__, err);
+		goto out;
+	}
+
+	ufs_msm_phy_qmp_20nm_advertise_quirks(phy_common);
 
 out:
 	return err;
@@ -158,21 +169,11 @@ static int ufs_msm_phy_qmp_20nm_is_pcs_ready(struct ufs_msm_phy *phy_common)
 	return err;
 }
 
-static void ufs_msm_phy_qmp_20nm_advertise_quirks(struct phy *generic_phy)
-{
-	struct ufs_msm_phy_qmp_20nm *phy =  phy_get_drvdata(generic_phy);
-	struct ufs_msm_phy *phy_common = &(phy->common_cfg);
-
-	phy_common->quirks =
-		MSM_UFS_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE;
-}
-
 struct phy_ops ufs_msm_phy_qmp_20nm_phy_ops = {
 	.init		= ufs_msm_phy_qmp_20nm_init,
 	.exit		= ufs_msm_phy_exit,
 	.power_on	= ufs_msm_phy_power_on,
 	.power_off	= ufs_msm_phy_power_off,
-	.advertise_quirks = ufs_msm_phy_qmp_20nm_advertise_quirks,
 	.owner		= THIS_MODULE,
 };
 

drivers/scsi/ufs/ufs-msm-phy-qmp-28nm.c

@@ -75,6 +75,13 @@ void ufs_msm_phy_qmp_28nm_power_control(struct ufs_msm_phy *phy, bool val)
 	}
 }
 
+static
+void ufs_msm_phy_qmp_28nm_advertise_quirks(struct ufs_msm_phy *phy_common)
+{
+	phy_common->quirks = MSM_UFS_PHY_QUIRK_CFG_RESTORE
+				| MSM_UFS_PHY_DIS_SIGDET_BEFORE_PWR_COLLAPSE;
+}
+
 static int ufs_msm_phy_qmp_28nm_init(struct phy *generic_phy)
 {
 	struct ufs_msm_phy_qmp_28nm *phy = phy_get_drvdata(generic_phy);
@@ -89,9 +96,13 @@ static int ufs_msm_phy_qmp_28nm_init(struct phy *generic_phy)
 	}
 
 	err = ufs_msm_phy_init_vregulators(generic_phy, phy_common);
-	if (err)
+	if (err) {
 		dev_err(phy_common->dev, "%s: ufs_msm_phy_init_vregulators() failed %d\n",
 			__func__, err);
+		goto out;
+	}
+
+	ufs_msm_phy_qmp_28nm_advertise_quirks(phy_common);
 
 out:
 	return err;
@@ -151,6 +162,27 @@ u32 ufs_msm_phy_qmp_28nm_read_attr(struct ufs_msm_phy *phy_common, u32 attr)
 	return l0;
 }
 
+static void
+ufs_msm_phy_qmp_28nm_write_attr(struct ufs_msm_phy *phy_common,
+				u32 attr, u32 val)
+{
+	writel_relaxed(attr, phy_common->mmio + UFS_PHY_RMMI_ATTRID);
+	writel_relaxed(val, phy_common->mmio + UFS_PHY_RMMI_ATTRWRVAL);
+	/* update attribute for both lanes */
+	writel_relaxed((UFS_PHY_RMMI_CFGWR_L0 | UFS_PHY_RMMI_CFGWR_L1),
+		       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
+	if (is_mphy_tx_attr(attr))
+		writel_relaxed((UFS_PHY_RMMI_TX_CFGUPDT_L0 |
+				UFS_PHY_RMMI_TX_CFGUPDT_L1),
+			       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
+	else
+		writel_relaxed((UFS_PHY_RMMI_RX_CFGUPDT_L0 |
+				UFS_PHY_RMMI_RX_CFGUPDT_L1),
+			       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
+
+	writel_relaxed(0x00, phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
+}
+
 static
 void ufs_msm_phy_qmp_28nm_save_configuration(struct ufs_msm_phy *phy_common)
 {
@@ -167,6 +199,16 @@ void ufs_msm_phy_qmp_28nm_save_configuration(struct ufs_msm_phy *phy_common)
 					cached_phy_attr[i].att);
 }
 
+static
+void ufs_msm_phy_qmp_28nm_restore_configuration(struct ufs_msm_phy *phy_common)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cached_phy_attr); i++)
+		ufs_msm_phy_qmp_28nm_write_attr(phy_common,
+			cached_phy_attr[i].att, cached_phy_attr[i].value);
+}
+
 static
 void ufs_msm_phy_qmp_28nm_set_tx_lane_enable(struct ufs_msm_phy *phy, u32 val)
 {
@@ -186,38 +228,6 @@ static inline void ufs_msm_phy_qmp_28nm_start_serdes(struct ufs_msm_phy *phy)
 	mb();
 }
 
-static void
-ufs_msm_phy_qmp_28nm_write_attr(struct phy *generic_phy, u32 attr, u32 val)
-{
-	struct ufs_msm_phy_qmp_28nm *phy =  phy_get_drvdata(generic_phy);
-	struct ufs_msm_phy *phy_common = &(phy->common_cfg);
-
-	writel_relaxed(attr, phy_common->mmio + UFS_PHY_RMMI_ATTRID);
-	writel_relaxed(val, phy_common->mmio + UFS_PHY_RMMI_ATTRWRVAL);
-	/* update attribute for both lanes */
-	writel_relaxed((UFS_PHY_RMMI_CFGWR_L0 | UFS_PHY_RMMI_CFGWR_L1),
-		       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
-	if (is_mphy_tx_attr(attr))
-		writel_relaxed((UFS_PHY_RMMI_TX_CFGUPDT_L0 |
-				UFS_PHY_RMMI_TX_CFGUPDT_L1),
-			       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
-	else
-		writel_relaxed((UFS_PHY_RMMI_RX_CFGUPDT_L0 |
-				UFS_PHY_RMMI_RX_CFGUPDT_L1),
-			       phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
-
-	writel_relaxed(0x00, phy_common->mmio + UFS_PHY_RMMI_ATTR_CTRL);
-}
-
-static void ufs_msm_phy_qmp_28nm_restore_attrs(struct phy *generic_phy)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(cached_phy_attr); i++)
-		ufs_msm_phy_qmp_28nm_write_attr(generic_phy,
-			cached_phy_attr[i].att, cached_phy_attr[i].value);
-}
-
 static int ufs_msm_phy_qmp_28nm_is_pcs_ready(struct ufs_msm_phy *phy_common)
 {
 	int err = 0;
@@ -232,55 +242,11 @@ static int ufs_msm_phy_qmp_28nm_is_pcs_ready(struct ufs_msm_phy *phy_common)
 	return err;
 }
 
-static void ufs_msm_phy_qmp_28nm_advertise_quirks(struct phy *generic_phy)
-{
-	struct ufs_msm_phy_qmp_28nm *phy =  phy_get_drvdata(generic_phy);
-	struct ufs_msm_phy *phy_common = &(phy->common_cfg);
-
-	phy_common->quirks = MSM_UFS_PHY_QUIRK_CFG_RESTORE
-				| MSM_UFS_PHY_DIS_SIGDET_BEFORE_PWR_COLLAPSE;
-}
-
-static int ufs_msm_phy_qmp_28nm_suspend(struct phy *generic_phy)
-{
-	struct ufs_msm_phy_qmp_28nm *phy =  phy_get_drvdata(generic_phy);
-	struct ufs_msm_phy *phy_common = &(phy->common_cfg);
-
-	ufs_msm_phy_disable_ref_clk(generic_phy);
-	ufs_msm_phy_qmp_28nm_power_control(phy_common, false);
-
-	ufs_msm_phy_disable_vreg(generic_phy, &phy_common->vdda_phy);
-	ufs_msm_phy_disable_vreg(generic_phy, &phy_common->vdda_pll);
-
-	return 0;
-}
-
-static int ufs_msm_phy_qmp_28nm_resume(struct phy *generic_phy)
-{
-	struct ufs_msm_phy_qmp_28nm *phy = phy_get_drvdata(generic_phy);
-	struct ufs_msm_phy *phy_common = &phy->common_cfg;
-	int err = 0;
-
-	ufs_msm_phy_qmp_28nm_start_serdes(phy_common);
-
-	ufs_msm_phy_qmp_28nm_restore_attrs(generic_phy);
-
-	err = ufs_msm_phy_qmp_28nm_is_pcs_ready(phy_common);
-	if (err)
-		dev_err(phy_common->dev, "%s: failed to init phy = %d\n",
-			__func__, err);
-
-	return err;
-}
-
 struct phy_ops ufs_msm_phy_qmp_28nm_phy_ops = {
 	.init		= ufs_msm_phy_qmp_28nm_init,
 	.exit		= ufs_msm_phy_exit,
 	.power_on	= ufs_msm_phy_power_on,
 	.power_off	= ufs_msm_phy_power_off,
-	.advertise_quirks = ufs_msm_phy_qmp_28nm_advertise_quirks,
-	.suspend	= ufs_msm_phy_qmp_28nm_suspend,
-	.resume		= ufs_msm_phy_qmp_28nm_resume,
 	.owner		= THIS_MODULE,
 };
 
@@ -288,6 +254,7 @@ struct ufs_msm_phy_specific_ops phy_28nm_ops = {
 	.calibrate_phy		= ufs_msm_phy_qmp_28nm_calibrate,
 	.start_serdes		= ufs_msm_phy_qmp_28nm_start_serdes,
 	.save_configuration	= ufs_msm_phy_qmp_28nm_save_configuration,
+	.restore_configuration	= ufs_msm_phy_qmp_28nm_restore_configuration,
 	.is_physical_coding_sublayer_ready = ufs_msm_phy_qmp_28nm_is_pcs_ready,
 	.set_tx_lane_enable	= ufs_msm_phy_qmp_28nm_set_tx_lane_enable,
 	.power_control		= ufs_msm_phy_qmp_28nm_power_control,

drivers/scsi/ufs/ufs-msm-phy.c

@@ -589,6 +589,22 @@ int ufs_msm_phy_save_configuration(struct phy *generic_phy)
 	return ret;
 }
 
+int ufs_msm_phy_restore_configuration(struct phy *generic_phy)
+{
+	struct ufs_msm_phy *ufs_msm_phy = get_ufs_msm_phy(generic_phy);
+	int ret = 0;
+
+	if (!ufs_msm_phy->phy_spec_ops->restore_configuration) {
+		dev_err(ufs_msm_phy->dev, "%s: restore_configuration() callback is not supported\n",
+			__func__);
+		ret = -ENOTSUPP;
+	} else {
+		ufs_msm_phy->phy_spec_ops->restore_configuration(ufs_msm_phy);
+	}
+
+	return ret;
+}
+
 int ufs_msm_phy_power_on(struct phy *generic_phy)
 {
 	struct ufs_msm_phy *phy_common = get_ufs_msm_phy(generic_phy);

drivers/scsi/ufs/ufs-msm-phy.h

@@ -142,6 +142,7 @@ struct ufs_msm_phy_specific_ops {
 	int (*calibrate_phy) (struct ufs_msm_phy *phy);
 	void (*start_serdes) (struct ufs_msm_phy *phy);
 	void (*save_configuration)(struct ufs_msm_phy *phy);
+	void (*restore_configuration)(struct ufs_msm_phy *phy);
 	int (*is_physical_coding_sublayer_ready) (struct ufs_msm_phy *phy);
 	void (*set_tx_lane_enable) (struct ufs_msm_phy *phy, u32 val);
 	void (*power_control) (struct ufs_msm_phy *phy, bool val);
@@ -171,6 +172,7 @@ int ufs_msm_phy_set_tx_lane_enable(struct phy *generic_phy, u32 tx_lanes);
 int ufs_msm_phy_calibrate_phy(struct phy *generic_phy);
 int ufs_msm_phy_is_pcs_ready(struct phy *generic_phy);
 int ufs_msm_phy_save_configuration(struct phy *generic_phy);
+int ufs_msm_phy_restore_configuration(struct phy *generic_phy);
 void ufs_msm_phy_save_controller_version(struct phy *generic_phy,
 			u8 major, u16 minor, u16 step);
 int ufs_msm_phy_power_on(struct phy *generic_phy);

drivers/scsi/ufs/ufs-msm.c

@@ -242,7 +242,8 @@ static int ufs_msm_power_up_sequence(struct ufs_hba *hba)
 	 * voltage, current to settle down before starting serdes.
 	 */
 	usleep_range(1000, 1100);
-	if (ufs_msm_phy_start_serdes(phy)) {
+	ret = ufs_msm_phy_start_serdes(phy);
+	if (ret) {
 		dev_err(hba->dev, "%s: ufs_msm_phy_start_serdes() failed, ret = %d\n",
 			__func__, ret);
 		goto out;
@@ -497,7 +498,26 @@ static int ufs_msm_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 		 */
 		usleep_range(1000, 1100);
 
-		err = phy_resume(host->generic_phy);
+		err = ufs_msm_phy_start_serdes(phy);
+		if (err) {
+			dev_err(hba->dev, "%s: ufs_msm_phy_start_serdes() failed, err = %d\n",
+				__func__, err);
+			goto out;
+		}
+
+		err = ufs_msm_phy_restore_configuration(phy);
+		if (err) {
+			dev_err(hba->dev, "%s: ufs_msm_phy_restore_configuration() failed, err = %d\n",
+				__func__, err);
+			goto out;
+		}
+
+		err = ufs_msm_phy_is_pcs_ready(phy);
+		if (err) {
+			dev_err(hba->dev, "%s: is_physical_coding_sublayer_ready() failed, err = %d\n",
+				__func__, err);
+			goto out;
+		}
 	}
 
 	hba->is_sys_suspended = false;
@@ -787,7 +807,6 @@ out:
  */
 static void ufs_msm_advertise_quirks(struct ufs_hba *hba)
 {
-	struct ufs_msm_host *host = hba->priv;
 	u8 major;
 	u16 minor, step;
 
@@ -802,8 +821,6 @@ static void ufs_msm_advertise_quirks(struct ufs_hba *hba)
 		hba->quirks |= (UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS
 			      | UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP
 			      | UFSHCD_QUIRK_BROKEN_LCC);
-
-	phy_advertise_quirks(host->generic_phy);
 }
 
 static int ufs_msm_get_bus_vote(struct ufs_msm_host *host,