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From: Biju Das <biju.das.jz@bp.renesas.com>
To: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Biju Das <biju.das.jz@bp.renesas.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>,
	linux-renesas-soc@vger.kernel.org, linux-phy@lists.infradead.org,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Chris Paterson <Chris.Paterson2@renesas.com>,
	Biju Das <biju.das@bp.renesas.com>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: [PATCH v5 3/6] phy: renesas: phy-rcar-gen3-usb2: Add USB2.0 PHY support for RZ/G2L
Date: Tue, 27 Jul 2021 19:55:24 +0100	[thread overview]
Message-ID: <20210727185527.19907-4-biju.das.jz@bp.renesas.com> (raw)
In-Reply-To: <20210727185527.19907-1-biju.das.jz@bp.renesas.com>

This patch adds USB2.0 PHY support for RZ/G2L SoC.

We need to use a different compatible string due to some differences
with R-Car Gen3 USB2.0 PHY. It uses line ctrl register for OTG_ID
pin changes and different OTG-BC interrupt bit for device recognition.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 v4->v5:
  * Updated commit description Add OTG support-> Add USB2.0 PHY support.
 v3->v4:
  * using family compatible instead of SoC specific.
 v3:
  * Made seperate compatible for RZ/G2L.
  * Extended rcar_gen3_phy_usb2_match_table[].data to support RZ/G2L.
---
 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 97 ++++++++++++++++++------
 1 file changed, 73 insertions(+), 24 deletions(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index fbc55232120e..9de617ca9daa 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -64,6 +64,7 @@
 /* VBCTRL */
 #define USB2_VBCTRL_OCCLREN		BIT(16)
 #define USB2_VBCTRL_DRVVBUSSEL		BIT(8)
+#define USB2_VBCTRL_VBOUT		BIT(0)
 
 /* LINECTRL1 */
 #define USB2_LINECTRL1_DPRPD_EN		BIT(19)
@@ -78,6 +79,10 @@
 #define USB2_ADPCTRL_IDPULLUP		BIT(5)	/* 1 = ID sampling is enabled */
 #define USB2_ADPCTRL_DRVVBUS		BIT(4)
 
+/*  RZ/G2L specific */
+#define USB2_OBINT_IDCHG_EN		BIT(0)
+#define USB2_LINECTRL1_USB2_IDMON	BIT(0)
+
 #define NUM_OF_PHYS			4
 enum rcar_gen3_phy_index {
 	PHY_INDEX_BOTH_HC,
@@ -112,9 +117,16 @@ struct rcar_gen3_chan {
 	struct mutex lock;	/* protects rphys[...].powered */
 	enum usb_dr_mode dr_mode;
 	int irq;
+	u32 obint_enable_bits;
 	bool extcon_host;
 	bool is_otg_channel;
 	bool uses_otg_pins;
+	bool soc_no_adp_ctrl;
+};
+
+struct rcar_gen3_phy_drv_data {
+	const struct phy_ops *phy_usb2_ops;
+	bool no_adp_ctrl;
 };
 
 /*
@@ -172,14 +184,22 @@ static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
 static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
 {
 	void __iomem *usb2_base = ch->base;
-	u32 val = readl(usb2_base + USB2_ADPCTRL);
+	u32 vbus_ctrl_reg = USB2_ADPCTRL;
+	u32 vbus_ctrl_val = USB2_ADPCTRL_DRVVBUS;
+	u32 val;
 
 	dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, vbus);
+	if (ch->soc_no_adp_ctrl) {
+		vbus_ctrl_reg = USB2_VBCTRL;
+		vbus_ctrl_val = USB2_VBCTRL_VBOUT;
+	}
+
+	val = readl(usb2_base + vbus_ctrl_reg);
 	if (vbus)
-		val |= USB2_ADPCTRL_DRVVBUS;
+		val |= vbus_ctrl_val;
 	else
-		val &= ~USB2_ADPCTRL_DRVVBUS;
-	writel(val, usb2_base + USB2_ADPCTRL);
+		val &= ~vbus_ctrl_val;
+	writel(val, usb2_base + vbus_ctrl_reg);
 }
 
 static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
@@ -188,9 +208,9 @@ static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
 	u32 val = readl(usb2_base + USB2_OBINTEN);
 
 	if (ch->uses_otg_pins && enable)
-		val |= USB2_OBINT_BITS;
+		val |= ch->obint_enable_bits;
 	else
-		val &= ~USB2_OBINT_BITS;
+		val &= ~ch->obint_enable_bits;
 	writel(val, usb2_base + USB2_OBINTEN);
 }
 
@@ -252,6 +272,9 @@ static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
 	if (!ch->uses_otg_pins)
 		return (ch->dr_mode == USB_DR_MODE_HOST) ? false : true;
 
+	if (ch->soc_no_adp_ctrl)
+		return !!(readl(ch->base + USB2_LINECTRL1) & USB2_LINECTRL1_USB2_IDMON);
+
 	return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
 }
 
@@ -376,16 +399,17 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
 	      USB2_LINECTRL1_DMRPD_EN | USB2_LINECTRL1_DM_RPD;
 	writel(val, usb2_base + USB2_LINECTRL1);
 
-	val = readl(usb2_base + USB2_VBCTRL);
-	val &= ~USB2_VBCTRL_OCCLREN;
-	writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
-	val = readl(usb2_base + USB2_ADPCTRL);
-	writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
-
+	if (!ch->soc_no_adp_ctrl) {
+		val = readl(usb2_base + USB2_VBCTRL);
+		val &= ~USB2_VBCTRL_OCCLREN;
+		writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
+		val = readl(usb2_base + USB2_ADPCTRL);
+		writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
+	}
 	msleep(20);
 
 	writel(0xffffffff, usb2_base + USB2_OBINTSTA);
-	writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
+	writel(ch->obint_enable_bits, usb2_base + USB2_OBINTEN);
 
 	rcar_gen3_device_recognition(ch);
 }
@@ -397,9 +421,9 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
 	u32 status = readl(usb2_base + USB2_OBINTSTA);
 	irqreturn_t ret = IRQ_NONE;
 
-	if (status & USB2_OBINT_BITS) {
+	if (status & ch->obint_enable_bits) {
 		dev_vdbg(ch->dev, "%s: %08x\n", __func__, status);
-		writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA);
+		writel(ch->obint_enable_bits, usb2_base + USB2_OBINTSTA);
 		rcar_gen3_device_recognition(ch);
 		ret = IRQ_HANDLED;
 	}
@@ -535,26 +559,45 @@ static const struct phy_ops rz_g1c_phy_usb2_ops = {
 	.owner		= THIS_MODULE,
 };
 
+static const struct rcar_gen3_phy_drv_data rcar_gen3_phy_usb2_data = {
+	.phy_usb2_ops = &rcar_gen3_phy_usb2_ops,
+	.no_adp_ctrl = false,
+};
+
+static const struct rcar_gen3_phy_drv_data rz_g1c_phy_usb2_data = {
+	.phy_usb2_ops = &rz_g1c_phy_usb2_ops,
+	.no_adp_ctrl = false,
+};
+
+static const struct rcar_gen3_phy_drv_data rz_g2l_phy_usb2_data = {
+	.phy_usb2_ops = &rcar_gen3_phy_usb2_ops,
+	.no_adp_ctrl = true,
+};
+
 static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
 	{
 		.compatible = "renesas,usb2-phy-r8a77470",
-		.data = &rz_g1c_phy_usb2_ops,
+		.data = &rz_g1c_phy_usb2_data,
 	},
 	{
 		.compatible = "renesas,usb2-phy-r8a7795",
-		.data = &rcar_gen3_phy_usb2_ops,
+		.data = &rcar_gen3_phy_usb2_data,
 	},
 	{
 		.compatible = "renesas,usb2-phy-r8a7796",
-		.data = &rcar_gen3_phy_usb2_ops,
+		.data = &rcar_gen3_phy_usb2_data,
 	},
 	{
 		.compatible = "renesas,usb2-phy-r8a77965",
-		.data = &rcar_gen3_phy_usb2_ops,
+		.data = &rcar_gen3_phy_usb2_data,
+	},
+	{
+		.compatible = "renesas,rzg2l-usb2-phy",
+		.data = &rz_g2l_phy_usb2_data,
 	},
 	{
 		.compatible = "renesas,rcar-gen3-usb2-phy",
-		.data = &rcar_gen3_phy_usb2_ops,
+		.data = &rcar_gen3_phy_usb2_data,
 	},
 	{ /* sentinel */ },
 };
@@ -608,10 +651,10 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
 
 static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 {
+	const struct rcar_gen3_phy_drv_data *phy_data;
 	struct device *dev = &pdev->dev;
 	struct rcar_gen3_chan *channel;
 	struct phy_provider *provider;
-	const struct phy_ops *phy_usb2_ops;
 	int ret = 0, i;
 
 	if (!dev->of_node) {
@@ -627,6 +670,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	if (IS_ERR(channel->base))
 		return PTR_ERR(channel->base);
 
+	channel->obint_enable_bits = USB2_OBINT_BITS;
 	/* get irq number here and request_irq for OTG in phy_init */
 	channel->irq = platform_get_irq_optional(pdev, 0);
 	channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
@@ -653,16 +697,21 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	 * And then, phy-core will manage runtime pm for this device.
 	 */
 	pm_runtime_enable(dev);
-	phy_usb2_ops = of_device_get_match_data(dev);
-	if (!phy_usb2_ops) {
+
+	phy_data = of_device_get_match_data(dev);
+	if (!phy_data) {
 		ret = -EINVAL;
 		goto error;
 	}
 
+	channel->soc_no_adp_ctrl = phy_data->no_adp_ctrl;
+	if (phy_data->no_adp_ctrl)
+		channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
+
 	mutex_init(&channel->lock);
 	for (i = 0; i < NUM_OF_PHYS; i++) {
 		channel->rphys[i].phy = devm_phy_create(dev, NULL,
-							phy_usb2_ops);
+							phy_data->phy_usb2_ops);
 		if (IS_ERR(channel->rphys[i].phy)) {
 			dev_err(dev, "Failed to create USB2 PHY\n");
 			ret = PTR_ERR(channel->rphys[i].phy);
-- 
2.17.1


  parent reply	other threads:[~2021-07-27 18:55 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 18:55 [PATCH v5 0/6] Add USB2.0 support Biju Das
2021-07-27 18:55 ` [PATCH v5 1/6] arm64: configs: defconfig: Enable RZ/G2L USBPHY control driver Biju Das
2021-07-27 18:55 ` [PATCH v5 2/6] dt-bindings: phy: renesas,usb2-phy: Document RZ/G2L phy bindings Biju Das
2021-08-02 20:55   ` Rob Herring
2021-08-04  9:38   ` Yoshihiro Shimoda
2021-08-06 12:42   ` Vinod Koul
2021-07-27 18:55 ` Biju Das [this message]
2021-08-04  9:38   ` [PATCH v5 3/6] phy: renesas: phy-rcar-gen3-usb2: Add USB2.0 PHY support for RZ/G2L Yoshihiro Shimoda
2021-08-06 12:43   ` Vinod Koul
2021-07-27 18:55 ` [PATCH v5 4/6] arm64: dts: renesas: r9a07g044: Add USB2.0 phy and host support Biju Das
2021-08-10 10:19   ` Geert Uytterhoeven
2021-08-12  7:17     ` Biju Das
2021-07-27 18:55 ` [PATCH v5 5/6] dt-bindings: usb: renesas,usbhs: Document RZ/G2L bindings Biju Das
2021-08-02 20:56   ` Rob Herring
2021-07-27 18:55 ` [PATCH v5 6/6] arm64: dts: renesas: r9a07g044: Add USB2.0 device support Biju Das
2021-08-10 10:20   ` Geert Uytterhoeven

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