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From:   Neil Armstrong <narmstrong@baylibre.com>
To:     kishon@ti.com, balbi@kernel.org, khilman@baylibre.com,
        martin.blumenstingl@googlemail.com
Cc:     Neil Armstrong <narmstrong@baylibre.com>,
        linux-amlogic@lists.infradead.org, linux-usb@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 08/13] usb: dwc3: meson-g12a: add support for GXL and GXM SoCs
Date:   Tue, 24 Mar 2020 11:20:25 +0100
Message-Id: <20200324102030.31000-9-narmstrong@baylibre.com>
In-Reply-To: <20200324102030.31000-1-narmstrong@baylibre.com>
References: <20200324102030.31000-1-narmstrong@baylibre.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In order to add support for the Amlogic GXL/GXM USB Glue, this adds
the corresponding :
- PHY names
- clock names
- USB2 PHY init and mode set
- regmap setup

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/usb/dwc3/dwc3-meson-g12a.c | 102 ++++++++++++++++++++++++++++-
 1 file changed, 101 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
index 04ef70661711..0eae5945e82e 100644
--- a/drivers/usb/dwc3/dwc3-meson-g12a.c
+++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -101,6 +101,11 @@
 #define PHY_COUNT						3
 #define USB2_OTG_PHY						1
 
+static struct clk_bulk_data meson_gxl_clocks[] = {
+	{ .id = "usb_ctrl" },
+	{ .id = "ddr" },
+};
+
 static struct clk_bulk_data meson_g12a_clocks[] = {
 	{ .id = NULL },
 };
@@ -111,6 +116,10 @@ static struct clk_bulk_data meson_a1_clocks[] = {
 	{ .id = "xtal_usb_ctrl" },
 };
 
+static const char *meson_gxm_phy_names[] = {
+	"usb2-phy0", "usb2-phy1", "usb2-phy2",
+};
+
 static const char *meson_g12a_phy_names[] = {
 	"usb2-phy0", "usb2-phy1", "usb3-phy0",
 };
@@ -137,16 +146,53 @@ struct dwc3_meson_g12a_drvdata {
 	int (*usb_post_init)(struct dwc3_meson_g12a *priv);
 };
 
+static int dwc3_meson_gxl_setup_regmaps(struct dwc3_meson_g12a *priv,
+					void __iomem *base);
 static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv,
 					 void __iomem *base);
 
 static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i,
-					  enum phy_mode mode);
+					 enum phy_mode mode);
+static int dwc3_meson_gxl_usb2_init_phy(struct dwc3_meson_g12a *priv, int i,
+					enum phy_mode mode);
 
 static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv,
 					int i, enum phy_mode mode);
+static int dwc3_meson_gxl_set_phy_mode(struct dwc3_meson_g12a *priv,
+				       int i, enum phy_mode mode);
 
 static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv);
+static int dwc3_meson_gxl_usb_init(struct dwc3_meson_g12a *priv);
+
+static int dwc3_meson_gxl_usb_post_init(struct dwc3_meson_g12a *priv);
+
+static struct dwc3_meson_g12a_drvdata gxl_drvdata = {
+	.otg_switch_supported = true,
+	.otg_phy_host_port_disable = true,
+	.clks = meson_gxl_clocks,
+	.num_clks = ARRAY_SIZE(meson_g12a_clocks),
+	.phy_names = meson_a1_phy_names,
+	.num_phys = ARRAY_SIZE(meson_a1_phy_names),
+	.setup_regmaps = dwc3_meson_gxl_setup_regmaps,
+	.usb2_init_phy = dwc3_meson_gxl_usb2_init_phy,
+	.set_phy_mode = dwc3_meson_gxl_set_phy_mode,
+	.usb_init = dwc3_meson_gxl_usb_init,
+	.usb_post_init = dwc3_meson_gxl_usb_post_init,
+};
+
+static struct dwc3_meson_g12a_drvdata gxm_drvdata = {
+	.otg_switch_supported = true,
+	.otg_phy_host_port_disable = true,
+	.clks = meson_gxl_clocks,
+	.num_clks = ARRAY_SIZE(meson_g12a_clocks),
+	.phy_names = meson_gxm_phy_names,
+	.num_phys = ARRAY_SIZE(meson_gxm_phy_names),
+	.setup_regmaps = dwc3_meson_gxl_setup_regmaps,
+	.usb2_init_phy = dwc3_meson_gxl_usb2_init_phy,
+	.set_phy_mode = dwc3_meson_gxl_set_phy_mode,
+	.usb_init = dwc3_meson_gxl_usb_init,
+	.usb_post_init = dwc3_meson_gxl_usb_post_init,
+};
 
 /*
  * For GXL and GXM SoCs:
@@ -201,6 +247,21 @@ struct dwc3_meson_g12a {
 	const struct dwc3_meson_g12a_drvdata *drvdata;
 };
 
+static int dwc3_meson_gxl_set_phy_mode(struct dwc3_meson_g12a *priv,
+					 int i, enum phy_mode mode)
+{
+	return phy_set_mode(priv->phys[i], mode);
+}
+
+static int dwc3_meson_gxl_usb2_init_phy(struct dwc3_meson_g12a *priv, int i,
+					enum phy_mode mode)
+{
+	/* On GXL PHY must be started in device mode for DWC2 init */
+	return priv->drvdata->set_phy_mode(priv, i,
+				(i == USB2_OTG_PHY) ? PHY_MODE_USB_DEVICE
+						    : PHY_MODE_USB_HOST);
+}
+
 static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv,
 					 int i, enum phy_mode mode)
 {
@@ -548,6 +609,18 @@ static int dwc3_meson_g12a_otg_init(struct platform_device *pdev,
 	return 0;
 }
 
+static int dwc3_meson_gxl_setup_regmaps(struct dwc3_meson_g12a *priv,
+					void __iomem *base)
+{
+	/* GXL controls the PHY mode in the PHY registers unlike G12A */
+	priv->usb_glue_regmap = devm_regmap_init_mmio(priv->dev, base,
+					&phy_meson_g12a_usb_glue_regmap_conf);
+	if (IS_ERR(priv->usb_glue_regmap))
+		return PTR_ERR(priv->usb_glue_regmap);
+
+	return 0;
+}
+
 static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv,
 					 void __iomem *base)
 {
@@ -588,6 +661,25 @@ static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv)
 	return dwc3_meson_g12a_usb_init_glue(priv, priv->otg_phy_mode);
 }
 
+static int dwc3_meson_gxl_usb_init(struct dwc3_meson_g12a *priv)
+{
+	return dwc3_meson_g12a_usb_init_glue(priv, PHY_MODE_USB_DEVICE);
+}
+
+static int dwc3_meson_gxl_usb_post_init(struct dwc3_meson_g12a *priv)
+{
+	int ret;
+
+	ret = priv->drvdata->set_phy_mode(priv, USB2_OTG_PHY,
+					  priv->otg_phy_mode);
+	if (ret)
+		return ret;
+
+	dwc3_meson_g12a_usb_otg_apply_mode(priv,  priv->otg_phy_mode);
+
+	return 0;
+}
+
 static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 {
 	struct dwc3_meson_g12a	*priv;
@@ -817,6 +909,14 @@ static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = {
 };
 
 static const struct of_device_id dwc3_meson_g12a_match[] = {
+	{
+		.compatible = "amlogic,meson-gxl-usb-ctrl",
+		.data = &gxl_drvdata,
+	},
+	{
+		.compatible = "amlogic,meson-gxm-usb-ctrl",
+		.data = &gxm_drvdata,
+	},
 	{
 		.compatible = "amlogic,meson-g12a-usb-ctrl",
 		.data = &g12a_drvdata,
-- 
2.22.0