[PATCH v3 0/7] phy-rockchip-inno-usb2: add RK3588 support

[PATCH v3 0/7] phy-rockchip-inno-usb2: add RK3588 support

[Sebastian Reichel]

Hi,

This adds RK3588 to the Rockchip Inno USB2 PHY driver. The RK3588 has four of
them. Two are used for USB2 and two are used by USB3 controllers (for USB2
fallback mode). All of them can be used with this patchset.

Changes since PATCHv2:
 * https://lore.kernel.org/linux-phy/20230403202307.120562-1-sebastian.reichel@collabora.com/
 * Dropped patch adding the syscon compatible to the DT binding (applied by Heiko)
 * Collected Reviewed-by from Rob Herring for DT binding patch (DT binding)
 * Rebased to v6.4-rc1
 * Removed superfluous init found by Vinod Koul
 * Added one additional patch improving the error message for missing phy-config
 * Fixed address_cells=2 code to not break the PHY at offset 0. I didn't notice it with the
   previous versions, since that PHY is used for USB3 on Rockchip evaluation board and I
   only started working on that recently.

Changes since PATCHv1:
 * https://lore.kernel.org/all/20230331163812.6124-1-sebastian.reichel@collabora.com/
 * Added patch simplifying phyclk handling
 * Added patch simplifying matchdata handling
 * Added patches for reset handling and PHY tuning; after doing more
   testing I noticed my previous patchset does not support hotplug and
   USB devices need to be plugged in at boot time (more specifically
   in PATCHv1 it had to be plugged before the PHY is suspended). This
   fixes the issue.

-- Sebastian

Sebastian Reichel (7):
  dt-bindings: phy: rockchip,inno-usb2phy: add rk3588
  phy: phy-rockchip-inno-usb2: add rk3588 support
  phy: phy-rockchip-inno-usb2: add reset support
  phy: phy-rockchip-inno-usb2: add rk3588 phy tuning support
  phy: phy-rockchip-inno-usb2: simplify phy clock handling
  phy: phy-rockchip-inno-usb2: simplify getting match data
  phy: phy-rockchip-inno-usb2: improve error message

 .../bindings/phy/rockchip,inno-usb2phy.yaml   |  21 +-
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 357 ++++++++++++++++--
 2 files changed, 339 insertions(+), 39 deletions(-)

-- 
2.39.2


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[PATCH v3 1/7] dt-bindings: phy: rockchip,inno-usb2phy: add rk3588

[Sebastian Reichel]

Add compatible for the USB2 phy in the Rockchip RK3588 SoC.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 .../bindings/phy/rockchip,inno-usb2phy.yaml   | 21 ++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
index 0d6b8c28be07..5254413137c6 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
@@ -20,6 +20,7 @@ properties:
       - rockchip,rk3366-usb2phy
       - rockchip,rk3399-usb2phy
       - rockchip,rk3568-usb2phy
+      - rockchip,rk3588-usb2phy
       - rockchip,rv1108-usb2phy
 
   reg:
@@ -56,6 +57,14 @@ properties:
     description: Muxed interrupt for both ports
     maxItems: 1
 
+  resets:
+    maxItems: 2
+
+  reset-names:
+    items:
+      - const: phy
+      - const: apb
+
   rockchip,usbgrf:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
@@ -120,15 +129,21 @@ required:
   - reg
   - clock-output-names
   - "#clock-cells"
-  - host-port
-  - otg-port
+
+anyOf:
+  - required:
+      - otg-port
+  - required:
+      - host-port
 
 allOf:
   - if:
       properties:
         compatible:
           contains:
-            const: rockchip,rk3568-usb2phy
+            enum:
+              - rockchip,rk3568-usb2phy
+              - rockchip,rk3588-usb2phy
 
     then:
       properties:
-- 
2.39.2


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[PATCH v3 2/7] phy: phy-rockchip-inno-usb2: add rk3588 support

[Sebastian Reichel]

Add basic support for the USB2 PHY found in the Rockchip RK3588.

Co-developed-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 226 ++++++++++++++++--
 1 file changed, 211 insertions(+), 15 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index a0bc10aa7961..2c4683c67a8e 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -116,6 +116,12 @@ struct rockchip_chg_det_reg {
  * @bvalid_det_en: vbus valid rise detection enable register.
  * @bvalid_det_st: vbus valid rise detection status register.
  * @bvalid_det_clr: vbus valid rise detection clear register.
+ * @disfall_en: host disconnect fall edge detection enable.
+ * @disfall_st: host disconnect fall edge detection state.
+ * @disfall_clr: host disconnect fall edge detection clear.
+ * @disrise_en: host disconnect rise edge detection enable.
+ * @disrise_st: host disconnect rise edge detection state.
+ * @disrise_clr: host disconnect rise edge detection clear.
  * @id_det_en: id detection enable register.
  * @id_det_st: id detection state register.
  * @id_det_clr: id detection clear register.
@@ -133,6 +139,12 @@ struct rockchip_usb2phy_port_cfg {
 	struct usb2phy_reg	bvalid_det_en;
 	struct usb2phy_reg	bvalid_det_st;
 	struct usb2phy_reg	bvalid_det_clr;
+	struct usb2phy_reg      disfall_en;
+	struct usb2phy_reg      disfall_st;
+	struct usb2phy_reg      disfall_clr;
+	struct usb2phy_reg      disrise_en;
+	struct usb2phy_reg      disrise_st;
+	struct usb2phy_reg      disrise_clr;
 	struct usb2phy_reg	id_det_en;
 	struct usb2phy_reg	id_det_st;
 	struct usb2phy_reg	id_det_clr;
@@ -168,6 +180,7 @@ struct rockchip_usb2phy_cfg {
  * @port_id: flag for otg port or host port.
  * @suspended: phy suspended flag.
  * @vbus_attached: otg device vbus status.
+ * @host_disconnect: usb host disconnect status.
  * @bvalid_irq: IRQ number assigned for vbus valid rise detection.
  * @id_irq: IRQ number assigned for ID pin detection.
  * @ls_irq: IRQ number assigned for linestate detection.
@@ -187,6 +200,7 @@ struct rockchip_usb2phy_port {
 	unsigned int	port_id;
 	bool		suspended;
 	bool		vbus_attached;
+	bool            host_disconnect;
 	int		bvalid_irq;
 	int		id_irq;
 	int		ls_irq;
@@ -405,6 +419,27 @@ static int rockchip_usb2phy_extcon_register(struct rockchip_usb2phy *rphy)
 	return 0;
 }
 
+static int rockchip_usb2phy_enable_host_disc_irq(struct rockchip_usb2phy *rphy,
+						 struct rockchip_usb2phy_port *rport,
+						 bool en)
+{
+	int ret;
+
+	ret = property_enable(rphy->grf, &rport->port_cfg->disfall_clr, true);
+	if (ret)
+		return ret;
+
+	ret = property_enable(rphy->grf, &rport->port_cfg->disfall_en, en);
+	if (ret)
+		return ret;
+
+	ret = property_enable(rphy->grf, &rport->port_cfg->disrise_clr, true);
+	if (ret)
+		return ret;
+
+	return property_enable(rphy->grf, &rport->port_cfg->disrise_en, en);
+}
+
 static int rockchip_usb2phy_init(struct phy *phy)
 {
 	struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
@@ -449,6 +484,15 @@ static int rockchip_usb2phy_init(struct phy *phy)
 			dev_dbg(&rport->phy->dev, "mode %d\n", rport->mode);
 		}
 	} else if (rport->port_id == USB2PHY_PORT_HOST) {
+		if (rport->port_cfg->disfall_en.offset) {
+			rport->host_disconnect = true;
+			ret = rockchip_usb2phy_enable_host_disc_irq(rphy, rport, true);
+			if (ret) {
+				dev_err(rphy->dev, "failed to enable disconnect irq\n");
+				goto out;
+			}
+		}
+
 		/* clear linestate and enable linestate detect irq */
 		ret = property_enable(rphy->grf,
 				      &rport->port_cfg->ls_det_clr, true);
@@ -810,9 +854,7 @@ static void rockchip_usb2phy_sm_work(struct work_struct *work)
 	struct rockchip_usb2phy_port *rport =
 		container_of(work, struct rockchip_usb2phy_port, sm_work.work);
 	struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
-	unsigned int sh = rport->port_cfg->utmi_hstdet.bitend -
-			  rport->port_cfg->utmi_hstdet.bitstart + 1;
-	unsigned int ul, uhd, state;
+	unsigned int sh, ul, uhd, state;
 	unsigned int ul_mask, uhd_mask;
 	int ret;
 
@@ -822,18 +864,26 @@ static void rockchip_usb2phy_sm_work(struct work_struct *work)
 	if (ret < 0)
 		goto next_schedule;
 
-	ret = regmap_read(rphy->grf, rport->port_cfg->utmi_hstdet.offset, &uhd);
-	if (ret < 0)
-		goto next_schedule;
-
-	uhd_mask = GENMASK(rport->port_cfg->utmi_hstdet.bitend,
-			   rport->port_cfg->utmi_hstdet.bitstart);
 	ul_mask = GENMASK(rport->port_cfg->utmi_ls.bitend,
 			  rport->port_cfg->utmi_ls.bitstart);
 
-	/* stitch on utmi_ls and utmi_hstdet as phy state */
-	state = ((uhd & uhd_mask) >> rport->port_cfg->utmi_hstdet.bitstart) |
-		(((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << sh);
+	if (rport->port_cfg->utmi_hstdet.offset) {
+		ret = regmap_read(rphy->grf, rport->port_cfg->utmi_hstdet.offset, &uhd);
+		if (ret < 0)
+			goto next_schedule;
+
+		uhd_mask = GENMASK(rport->port_cfg->utmi_hstdet.bitend,
+				   rport->port_cfg->utmi_hstdet.bitstart);
+
+		sh = rport->port_cfg->utmi_hstdet.bitend -
+		     rport->port_cfg->utmi_hstdet.bitstart + 1;
+		/* stitch on utmi_ls and utmi_hstdet as phy state */
+		state = ((uhd & uhd_mask) >> rport->port_cfg->utmi_hstdet.bitstart) |
+			(((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << sh);
+	} else {
+		state = ((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << 1 |
+			rport->host_disconnect;
+	}
 
 	switch (state) {
 	case PHY_STATE_HS_ONLINE:
@@ -966,6 +1016,31 @@ static irqreturn_t rockchip_usb2phy_otg_mux_irq(int irq, void *data)
 	return ret;
 }
 
+static irqreturn_t rockchip_usb2phy_host_disc_irq(int irq, void *data)
+{
+	struct rockchip_usb2phy_port *rport = data;
+	struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
+
+	if (!property_enabled(rphy->grf, &rport->port_cfg->disfall_st) &&
+	    !property_enabled(rphy->grf, &rport->port_cfg->disrise_st))
+		return IRQ_NONE;
+
+	mutex_lock(&rport->mutex);
+
+	/* clear disconnect fall or rise detect irq pending status */
+	if (property_enabled(rphy->grf, &rport->port_cfg->disfall_st)) {
+		property_enable(rphy->grf, &rport->port_cfg->disfall_clr, true);
+		rport->host_disconnect = false;
+	} else if (property_enabled(rphy->grf, &rport->port_cfg->disrise_st)) {
+		property_enable(rphy->grf, &rport->port_cfg->disrise_clr, true);
+		rport->host_disconnect = true;
+	}
+
+	mutex_unlock(&rport->mutex);
+
+	return IRQ_HANDLED;
+}
+
 static irqreturn_t rockchip_usb2phy_irq(int irq, void *data)
 {
 	struct rockchip_usb2phy *rphy = data;
@@ -978,6 +1053,10 @@ static irqreturn_t rockchip_usb2phy_irq(int irq, void *data)
 		if (!rport->phy)
 			continue;
 
+		if (rport->port_id == USB2PHY_PORT_HOST &&
+		    rport->port_cfg->disfall_en.offset)
+			ret |= rockchip_usb2phy_host_disc_irq(irq, rport);
+
 		switch (rport->port_id) {
 		case USB2PHY_PORT_OTG:
 			if (rport->mode != USB_DR_MODE_HOST &&
@@ -1233,7 +1312,7 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	}
 
 	/* support address_cells=2 */
-	if (reg == 0) {
+	if (of_property_count_u32_elems(np, "reg") > 2 && reg == 0) {
 		if (of_property_read_u32_index(np, "reg", 1, &reg)) {
 			dev_err(dev, "the reg property is not assigned in %pOFn node\n",
 				np);
@@ -1254,14 +1333,14 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 
 	/* find out a proper config which can be matched with dt. */
 	index = 0;
-	while (phy_cfgs[index].reg) {
+	do {
 		if (phy_cfgs[index].reg == reg) {
 			rphy->phy_cfg = &phy_cfgs[index];
 			break;
 		}
 
 		++index;
-	}
+	} while (phy_cfgs[index].reg);
 
 	if (!rphy->phy_cfg) {
 		dev_err(dev, "no phy-config can be matched with %pOFn node\n",
@@ -1664,6 +1743,122 @@ static const struct rockchip_usb2phy_cfg rk3568_phy_cfgs[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
+	{
+		.reg = 0x0000,
+		.num_ports	= 1,
+		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_OTG] = {
+				.phy_sus	= { 0x000c, 11, 11, 0, 1 },
+				.bvalid_det_en	= { 0x0080, 1, 1, 0, 1 },
+				.bvalid_det_st	= { 0x0084, 1, 1, 0, 1 },
+				.bvalid_det_clr = { 0x0088, 1, 1, 0, 1 },
+				.ls_det_en	= { 0x0080, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x0084, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x0088, 0, 0, 0, 1 },
+				.disfall_en	= { 0x0080, 6, 6, 0, 1 },
+				.disfall_st	= { 0x0084, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x0088, 6, 6, 0, 1 },
+				.disrise_en	= { 0x0080, 5, 5, 0, 1 },
+				.disrise_st	= { 0x0084, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x0088, 5, 5, 0, 1 },
+				.utmi_avalid	= { 0x00c0, 7, 7, 0, 1 },
+				.utmi_bvalid	= { 0x00c0, 6, 6, 0, 1 },
+				.utmi_ls	= { 0x00c0, 10, 9, 0, 1 },
+			}
+		},
+		.chg_det = {
+			.cp_det		= { 0x00c0, 0, 0, 0, 1 },
+			.dcp_det	= { 0x00c0, 0, 0, 0, 1 },
+			.dp_det		= { 0x00c0, 1, 1, 1, 0 },
+			.idm_sink_en	= { 0x0008, 5, 5, 1, 0 },
+			.idp_sink_en	= { 0x0008, 5, 5, 0, 1 },
+			.idp_src_en	= { 0x0008, 14, 14, 0, 1 },
+			.rdm_pdwn_en	= { 0x0008, 14, 14, 0, 1 },
+			.vdm_src_en	= { 0x0008, 7, 6, 0, 3 },
+			.vdp_src_en	= { 0x0008, 7, 6, 0, 3 },
+		},
+	},
+	{
+		.reg = 0x4000,
+		.num_ports	= 1,
+		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_OTG] = {
+				.phy_sus	= { 0x000c, 11, 11, 0, 1 },
+				.bvalid_det_en	= { 0x0080, 1, 1, 0, 1 },
+				.bvalid_det_st	= { 0x0084, 1, 1, 0, 1 },
+				.bvalid_det_clr = { 0x0088, 1, 1, 0, 1 },
+				.ls_det_en	= { 0x0080, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x0084, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x0088, 0, 0, 0, 1 },
+				.disfall_en	= { 0x0080, 6, 6, 0, 1 },
+				.disfall_st	= { 0x0084, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x0088, 6, 6, 0, 1 },
+				.disrise_en	= { 0x0080, 5, 5, 0, 1 },
+				.disrise_st	= { 0x0084, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x0088, 5, 5, 0, 1 },
+				.utmi_avalid	= { 0x00c0, 7, 7, 0, 1 },
+				.utmi_bvalid	= { 0x00c0, 6, 6, 0, 1 },
+				.utmi_ls	= { 0x00c0, 10, 9, 0, 1 },
+			}
+		},
+		.chg_det = {
+			.cp_det		= { 0x00c0, 0, 0, 0, 1 },
+			.dcp_det	= { 0x00c0, 0, 0, 0, 1 },
+			.dp_det		= { 0x00c0, 1, 1, 1, 0 },
+			.idm_sink_en	= { 0x0008, 5, 5, 1, 0 },
+			.idp_sink_en	= { 0x0008, 5, 5, 0, 1 },
+			.idp_src_en	= { 0x0008, 14, 14, 0, 1 },
+			.rdm_pdwn_en	= { 0x0008, 14, 14, 0, 1 },
+			.vdm_src_en	= { 0x0008, 7, 6, 0, 3 },
+			.vdp_src_en	= { 0x0008, 7, 6, 0, 3 },
+		},
+	},
+	{
+		.reg = 0x8000,
+		.num_ports	= 1,
+		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_HOST] = {
+				.phy_sus	= { 0x0008, 2, 2, 0, 1 },
+				.ls_det_en	= { 0x0080, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x0084, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x0088, 0, 0, 0, 1 },
+				.disfall_en	= { 0x0080, 6, 6, 0, 1 },
+				.disfall_st	= { 0x0084, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x0088, 6, 6, 0, 1 },
+				.disrise_en	= { 0x0080, 5, 5, 0, 1 },
+				.disrise_st	= { 0x0084, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x0088, 5, 5, 0, 1 },
+				.utmi_ls	= { 0x00c0, 10, 9, 0, 1 },
+			}
+		},
+	},
+	{
+		.reg = 0xc000,
+		.num_ports	= 1,
+		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_HOST] = {
+				.phy_sus	= { 0x0008, 2, 2, 0, 1 },
+				.ls_det_en	= { 0x0080, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x0084, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x0088, 0, 0, 0, 1 },
+				.disfall_en	= { 0x0080, 6, 6, 0, 1 },
+				.disfall_st	= { 0x0084, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x0088, 6, 6, 0, 1 },
+				.disrise_en	= { 0x0080, 5, 5, 0, 1 },
+				.disrise_st	= { 0x0084, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x0088, 5, 5, 0, 1 },
+				.utmi_ls	= { 0x00c0, 10, 9, 0, 1 },
+			}
+		},
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rockchip_usb2phy_cfg rv1108_phy_cfgs[] = {
 	{
 		.reg = 0x100,
@@ -1714,6 +1909,7 @@ static const struct of_device_id rockchip_usb2phy_dt_match[] = {
 	{ .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
 	{ .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
 	{ .compatible = "rockchip,rk3568-usb2phy", .data = &rk3568_phy_cfgs },
+	{ .compatible = "rockchip,rk3588-usb2phy", .data = &rk3588_phy_cfgs },
 	{ .compatible = "rockchip,rv1108-usb2phy", .data = &rv1108_phy_cfgs },
 	{}
 };
-- 
2.39.2


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[PATCH v3 3/7] phy: phy-rockchip-inno-usb2: add reset support

[Sebastian Reichel]

Add reset handling support, which is needed for proper
operation with RK3588.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 2c4683c67a8e..101b46939f0b 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/regmap.h>
+#include <linux/reset.h>
 #include <linux/mfd/syscon.h>
 #include <linux/usb/of.h>
 #include <linux/usb/otg.h>
@@ -223,6 +224,7 @@ struct rockchip_usb2phy_port {
  * @clk: clock struct of phy input clk.
  * @clk480m: clock struct of phy output clk.
  * @clk480m_hw: clock struct of phy output clk management.
+ * @phy_reset: phy reset control.
  * @chg_state: states involved in USB charger detection.
  * @chg_type: USB charger types.
  * @dcd_retries: The retry count used to track Data contact
@@ -239,6 +241,7 @@ struct rockchip_usb2phy {
 	struct clk	*clk;
 	struct clk	*clk480m;
 	struct clk_hw	clk480m_hw;
+	struct reset_control	*phy_reset;
 	enum usb_chg_state	chg_state;
 	enum power_supply_type	chg_type;
 	u8			dcd_retries;
@@ -280,6 +283,25 @@ static inline bool property_enabled(struct regmap *base,
 	return tmp != reg->disable;
 }
 
+static int rockchip_usb2phy_reset(struct rockchip_usb2phy *rphy)
+{
+	int ret;
+
+	ret = reset_control_assert(rphy->phy_reset);
+	if (ret)
+		return ret;
+
+	udelay(10);
+
+	ret = reset_control_deassert(rphy->phy_reset);
+	if (ret)
+		return ret;
+
+	usleep_range(100, 200);
+
+	return 0;
+}
+
 static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw)
 {
 	struct rockchip_usb2phy *rphy =
@@ -534,6 +556,18 @@ static int rockchip_usb2phy_power_on(struct phy *phy)
 		return ret;
 	}
 
+	/*
+	 * For rk3588, it needs to reset phy when exit from
+	 * suspend mode with common_on_n 1'b1(aka REFCLK_LOGIC,
+	 * Bias, and PLL blocks are powered down) for lower
+	 * power consumption. If you don't want to reset phy,
+	 * please keep the common_on_n 1'b0 to set these blocks
+	 * remain powered.
+	 */
+	ret = rockchip_usb2phy_reset(rphy);
+	if (ret)
+		return ret;
+
 	/* waiting for the utmi_clk to become stable */
 	usleep_range(1500, 2000);
 
@@ -1348,6 +1382,10 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	rphy->phy_reset = devm_reset_control_get_optional(dev, "phy");
+	if (IS_ERR(rphy->phy_reset))
+		return PTR_ERR(rphy->phy_reset);
+
 	rphy->clk = of_clk_get_by_name(np, "phyclk");
 	if (!IS_ERR(rphy->clk)) {
 		clk_prepare_enable(rphy->clk);
-- 
2.39.2


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[PATCH v3 4/7] phy: phy-rockchip-inno-usb2: add rk3588 phy tuning support

[Sebastian Reichel]

On RK3588 some registers need to be tweaked to support waking up from
suspend when a USB device is plugged into a port from a suspended PHY.
Without this change USB devices only work when they are plugged at
boot time.

Apart from that it optimizes settings to avoid devices toggling
between fullspeed and highspeed mode.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 101b46939f0b..aa8c55609c0d 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -33,6 +33,8 @@
 #define SCHEDULE_DELAY		(60 * HZ)
 #define OTG_SCHEDULE_DELAY	(2 * HZ)
 
+struct rockchip_usb2phy;
+
 enum rockchip_usb2phy_port_id {
 	USB2PHY_PORT_OTG,
 	USB2PHY_PORT_HOST,
@@ -163,6 +165,7 @@ struct rockchip_usb2phy_port_cfg {
  * struct rockchip_usb2phy_cfg - usb-phy configuration.
  * @reg: the address offset of grf for usb-phy config.
  * @num_ports: specify how many ports that the phy has.
+ * @phy_tuning: phy default parameters tuning.
  * @clkout_ctl: keep on/turn off output clk of phy.
  * @port_cfgs: usb-phy port configurations.
  * @chg_det: charger detection registers.
@@ -170,6 +173,7 @@ struct rockchip_usb2phy_port_cfg {
 struct rockchip_usb2phy_cfg {
 	unsigned int	reg;
 	unsigned int	num_ports;
+	int (*phy_tuning)(struct rockchip_usb2phy *rphy);
 	struct usb2phy_reg	clkout_ctl;
 	const struct rockchip_usb2phy_port_cfg	port_cfgs[USB2PHY_NUM_PORTS];
 	const struct rockchip_chg_det_reg	chg_det;
@@ -1400,6 +1404,12 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 		goto disable_clks;
 	}
 
+	if (rphy->phy_cfg->phy_tuning) {
+		ret = rphy->phy_cfg->phy_tuning(rphy);
+		if (ret)
+			goto disable_clks;
+	}
+
 	index = 0;
 	for_each_available_child_of_node(np, child_np) {
 		struct rockchip_usb2phy_port *rport = &rphy->ports[index];
@@ -1468,6 +1478,55 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int rk3588_usb2phy_tuning(struct rockchip_usb2phy *rphy)
+{
+	int ret;
+	bool usb3otg = false;
+	/*
+	 * utmi_termselect = 1'b1 (en FS terminations)
+	 * utmi_xcvrselect = 2'b01 (FS transceiver)
+	 */
+	int suspend_cfg = 0x14;
+
+	if (rphy->phy_cfg->reg == 0x0000 || rphy->phy_cfg->reg == 0x4000) {
+		/* USB2 config for USB3_0 and USB3_1 */
+		suspend_cfg |= 0x01; /* utmi_opmode = 2'b01 (no-driving) */
+		usb3otg = true;
+	} else if (rphy->phy_cfg->reg == 0x8000 || rphy->phy_cfg->reg == 0xc000) {
+		/* USB2 config for USB2_0 and USB2_1 */
+		suspend_cfg |= 0x00; /* utmi_opmode = 2'b00 (normal) */
+	} else {
+		return -EINVAL;
+	}
+
+	/* Deassert SIDDQ to power on analog block */
+	ret = regmap_write(rphy->grf, 0x0008, GENMASK(29, 29) | 0x0000);
+	if (ret)
+		return ret;
+
+	/* Do reset after exit IDDQ mode */
+	ret = rockchip_usb2phy_reset(rphy);
+	if (ret)
+		return ret;
+
+	/* suspend configuration */
+	ret |= regmap_write(rphy->grf, 0x000c, GENMASK(20, 16) | suspend_cfg);
+
+	/* HS DC Voltage Level Adjustment 4'b1001 : +5.89% */
+	ret |= regmap_write(rphy->grf, 0x0004, GENMASK(27, 24) | 0x0900);
+
+	/* HS Transmitter Pre-Emphasis Current Control 2'b10 : 2x */
+	ret |= regmap_write(rphy->grf, 0x0008, GENMASK(20, 19) | 0x0010);
+
+	if (!usb3otg)
+		return ret;
+
+	/* Pullup iddig pin for USB3_0 OTG mode */
+	ret |= regmap_write(rphy->grf, 0x0010, GENMASK(17, 16) | 0x0003);
+
+	return ret;
+}
+
 static const struct rockchip_usb2phy_cfg rk3228_phy_cfgs[] = {
 	{
 		.reg = 0x760,
@@ -1785,6 +1844,7 @@ static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
 	{
 		.reg = 0x0000,
 		.num_ports	= 1,
+		.phy_tuning	= rk3588_usb2phy_tuning,
 		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
 		.port_cfgs	= {
 			[USB2PHY_PORT_OTG] = {
@@ -1821,6 +1881,7 @@ static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
 	{
 		.reg = 0x4000,
 		.num_ports	= 1,
+		.phy_tuning	= rk3588_usb2phy_tuning,
 		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
 		.port_cfgs	= {
 			[USB2PHY_PORT_OTG] = {
@@ -1857,6 +1918,7 @@ static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
 	{
 		.reg = 0x8000,
 		.num_ports	= 1,
+		.phy_tuning	= rk3588_usb2phy_tuning,
 		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
 		.port_cfgs	= {
 			[USB2PHY_PORT_HOST] = {
@@ -1877,6 +1939,7 @@ static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
 	{
 		.reg = 0xc000,
 		.num_ports	= 1,
+		.phy_tuning	= rk3588_usb2phy_tuning,
 		.clkout_ctl	= { 0x0000, 0, 0, 1, 0 },
 		.port_cfgs	= {
 			[USB2PHY_PORT_HOST] = {
-- 
2.39.2


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[PATCH v3 5/7] phy: phy-rockchip-inno-usb2: simplify phy clock handling

[Sebastian Reichel]

Simplify phyclk handling by using devm_clk_get_optional_enabled to
acquire and enable the optional clock. This also fixes a resource
leak in driver remove path and adds proper error handling.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index aa8c55609c0d..1cf84869e78b 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -1390,24 +1390,22 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	if (IS_ERR(rphy->phy_reset))
 		return PTR_ERR(rphy->phy_reset);
 
-	rphy->clk = of_clk_get_by_name(np, "phyclk");
-	if (!IS_ERR(rphy->clk)) {
-		clk_prepare_enable(rphy->clk);
-	} else {
-		dev_info(&pdev->dev, "no phyclk specified\n");
-		rphy->clk = NULL;
+	rphy->clk = devm_clk_get_optional_enabled(dev, "phyclk");
+	if (IS_ERR(rphy->clk)) {
+		return dev_err_probe(&pdev->dev, PTR_ERR(rphy->clk),
+				     "failed to get phyclk\n");
 	}
 
 	ret = rockchip_usb2phy_clk480m_register(rphy);
 	if (ret) {
 		dev_err(dev, "failed to register 480m output clock\n");
-		goto disable_clks;
+		return ret;
 	}
 
 	if (rphy->phy_cfg->phy_tuning) {
 		ret = rphy->phy_cfg->phy_tuning(rphy);
 		if (ret)
-			goto disable_clks;
+			return ret;
 	}
 
 	index = 0;
@@ -1470,11 +1468,6 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 
 put_child:
 	of_node_put(child_np);
-disable_clks:
-	if (rphy->clk) {
-		clk_disable_unprepare(rphy->clk);
-		clk_put(rphy->clk);
-	}
 	return ret;
 }
 
-- 
2.39.2


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[PATCH v3 6/7] phy: phy-rockchip-inno-usb2: simplify getting match data

[Sebastian Reichel]

Simplify the code by directly getting the match data via
device_get_match_data() instead of open coding its functionality.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 1cf84869e78b..f5c30f117cba 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -1305,7 +1305,6 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	struct phy_provider *provider;
 	struct rockchip_usb2phy *rphy;
 	const struct rockchip_usb2phy_cfg *phy_cfgs;
-	const struct of_device_id *match;
 	unsigned int reg;
 	int index, ret;
 
@@ -1313,12 +1312,6 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	if (!rphy)
 		return -ENOMEM;
 
-	match = of_match_device(dev->driver->of_match_table, dev);
-	if (!match || !match->data) {
-		dev_err(dev, "phy configs are not assigned!\n");
-		return -EINVAL;
-	}
-
 	if (!dev->parent || !dev->parent->of_node) {
 		rphy->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,usbgrf");
 		if (IS_ERR(rphy->grf)) {
@@ -1359,12 +1352,15 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	}
 
 	rphy->dev = dev;
-	phy_cfgs = match->data;
+	phy_cfgs = device_get_match_data(dev);
 	rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 	rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 	rphy->irq = platform_get_irq_optional(pdev, 0);
 	platform_set_drvdata(pdev, rphy);
 
+	if (!phy_cfgs)
+		return dev_err_probe(dev, -EINVAL, "phy configs are not assigned!\n");
+
 	ret = rockchip_usb2phy_extcon_register(rphy);
 	if (ret)
 		return ret;
-- 
2.39.2


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[PATCH v3 7/7] phy: phy-rockchip-inno-usb2: improve error message

[Sebastian Reichel]

Printing the OF node is not useful, since we get the same information
from the device context. Instead print the reg address, that could
not be found.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index f5c30f117cba..b982c3f0d4b5 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -1377,8 +1377,7 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	} while (phy_cfgs[index].reg);
 
 	if (!rphy->phy_cfg) {
-		dev_err(dev, "no phy-config can be matched with %pOFn node\n",
-			np);
+		dev_err(dev, "could not find phy config for reg=0x%08x\n", reg);
 		return -EINVAL;
 	}
 
-- 
2.39.2


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Re: [PATCH v3 0/7] phy-rockchip-inno-usb2: add RK3588 support

[Vinod Koul]

On Mon, 22 May 2023 19:03:17 +0200, Sebastian Reichel wrote:
> This adds RK3588 to the Rockchip Inno USB2 PHY driver. The RK3588 has four of
> them. Two are used for USB2 and two are used by USB3 controllers (for USB2
> fallback mode). All of them can be used with this patchset.
> 
> Changes since PATCHv2:
>  * https://lore.kernel.org/linux-phy/20230403202307.120562-1-sebastian.reichel@collabora.com/
>  * Dropped patch adding the syscon compatible to the DT binding (applied by Heiko)
>  * Collected Reviewed-by from Rob Herring for DT binding patch (DT binding)
>  * Rebased to v6.4-rc1
>  * Removed superfluous init found by Vinod Koul
>  * Added one additional patch improving the error message for missing phy-config
>  * Fixed address_cells=2 code to not break the PHY at offset 0. I didn't notice it with the
>    previous versions, since that PHY is used for USB3 on Rockchip evaluation board and I
>    only started working on that recently.
> 
> [...]

Applied, thanks!

[1/7] dt-bindings: phy: rockchip,inno-usb2phy: add rk3588
      commit: 26720f89ee6878ef505812e852a3e914b7cbfe44
[2/7] phy: phy-rockchip-inno-usb2: add rk3588 support
      commit: 52b99b871eb79637342660b46c900642483d4412
[3/7] phy: phy-rockchip-inno-usb2: add reset support
      commit: 44d88aa9ae81c79ccc47ba4ef85aeda968bc4a50
[4/7] phy: phy-rockchip-inno-usb2: add rk3588 phy tuning support
      commit: 7d508a92e4588a59b909e235667d515051dd5955
[5/7] phy: phy-rockchip-inno-usb2: simplify phy clock handling
      commit: f4ca578b9803601074ab0d9e366b5fcda504e5a6
[6/7] phy: phy-rockchip-inno-usb2: simplify getting match data
      commit: 2e5ead8478e8e4a7b3d63a2001c2f0022b2f5e1b
[7/7] phy: phy-rockchip-inno-usb2: improve error message
      commit: e7254a4a7c444fa194440fa8dc73c7728e927162

Best regards,
-- 
~Vinod



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