usb: i.MX chipidea: Add devicetree support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 107 insertions, 26 deletions

diff --git a/drivers/usb/imx/chipidea-imx.c b/drivers/usb/imx/chipidea-imx.c
index 1570f90d9c..508dbd8a08 100644
--- a/drivers/usb/imx/chipidea-imx.c
+++ b/drivers/usb/imx/chipidea-imx.c
@@ -16,6 +16,7 @@
 #include <init.h>
 #include <io.h>
 #include <driver.h>
+#include <usb/usb.h>
 #include <usb/ehci.h>
 #include <usb/chipidea-imx.h>
 #include <usb/ulpi.h>
@@ -23,64 +24,135 @@
 
 #define MXC_EHCI_PORTSC_MASK ((0xf << 28) | (1 << 25))
 
+struct imx_chipidea {
+	struct device_d *dev;
+	struct ehci_data data;
+	unsigned long flags;
+	enum imx_usb_mode mode;
+	int (*init)(int port);
+	int portno;
+};
+
 static int imx_chipidea_port_init(void *drvdata)
 {
-	struct device_d *dev = drvdata;
-	struct imxusb_platformdata *pdata = dev->platform_data;
+	struct imx_chipidea *ci = drvdata;
 	int ret;
 
-	ret = imx_usbmisc_port_init(dev->id, pdata->flags);
+	ret = imx_usbmisc_port_init(ci->portno, ci->flags);
 	if (ret)
-		dev_err(dev, "misc init failed: %s\n", strerror(-ret));
+		dev_err(ci->dev, "misc init failed: %s\n", strerror(-ret));
 
-	if (pdata->init)
-		pdata->init(dev->id);
+	if (ci->init)
+		ci->init(ci->portno);
 
 	return ret;
 }
 
 static int imx_chipidea_port_post_init(void *drvdata)
 {
-	struct device_d *dev = drvdata;
-	struct imxusb_platformdata *pdata = dev->platform_data;
+	struct imx_chipidea *ci = drvdata;
 	int ret;
 
-	ret = imx_usbmisc_port_post_init(dev->id, pdata->flags);
+	ret = imx_usbmisc_port_post_init(ci->portno, ci->flags);
 	if (ret)
-		dev_err(dev, "post misc init failed: %s\n", strerror(-ret));
+		dev_err(ci->dev, "post misc init failed: %s\n", strerror(-ret));
 
 	return ret;
 }
 
+static int imx_chipidea_probe_dt(struct imx_chipidea *ci)
+{
+	const void *out_args;
+	struct device_node *usbmisc_np;
+	enum usb_dr_mode mode;
+	enum usb_phy_interface phymode;
+
+	of_parse_phandles_with_args(ci->dev->device_node, "fsl,usbmisc",
+			"#index-cells", 0, &usbmisc_np, &out_args);
+
+	ci->portno = be32_to_cpup(out_args);
+
+	ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
+
+	mode = of_usb_get_dr_mode(ci->dev->device_node, NULL);
+
+	switch (mode) {
+	case USB_DR_MODE_HOST:
+	default:
+		ci->mode = IMX_USB_MODE_HOST;
+		break;
+	case USB_DR_MODE_PERIPHERAL:
+		ci->mode = IMX_USB_MODE_DEVICE;
+		break;
+	}
+
+	phymode = of_usb_get_phy_mode(ci->dev->device_node, NULL);
+	switch (phymode) {
+	case USBPHY_INTERFACE_MODE_UTMI:
+		ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
+		break;
+	case USBPHY_INTERFACE_MODE_UTMIW:
+		ci->flags = MXC_EHCI_MODE_UTMI_16_BIT;
+		break;
+	case USBPHY_INTERFACE_MODE_ULPI:
+		ci->flags = MXC_EHCI_MODE_ULPI;
+		break;
+	case USBPHY_INTERFACE_MODE_SERIAL:
+		ci->flags = MXC_EHCI_MODE_SERIAL;
+		break;
+	case USBPHY_INTERFACE_MODE_HSIC:
+		ci->flags = MXC_EHCI_MODE_HSIC;
+		break;
+	default:
+		dev_err(ci->dev, "no or invalid phy mode setting\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int imx_chipidea_probe(struct device_d *dev)
 {
 	struct imxusb_platformdata *pdata = dev->platform_data;
 	int ret;
 	void __iomem *base;
-	struct ehci_data data = {};
+	struct imx_chipidea *ci;
 	uint32_t portsc;
 
-	if (!pdata) {
-		dev_err(dev, "no pdata!\n");
-		return -EINVAL;
+	ci = xzalloc(sizeof(*ci));
+	ci->dev = dev;
+
+	if (IS_ENABLED(CONFIG_OFDEVICE) && dev->device_node) {
+		ret = imx_chipidea_probe_dt(ci);
+		if (ret)
+			return ret;
+	} else {
+		if (!pdata) {
+			dev_err(dev, "no pdata!\n");
+			return -EINVAL;
+		}
+		ci->portno = dev->id;
+		ci->flags = pdata->flags;
+		ci->init = pdata->init;
+		ci->mode = pdata->mode;
 	}
 
 	base = dev_request_mem_region(dev, 0);
 	if (!base)
 		return -ENODEV;
 
-	data.init = imx_chipidea_port_init;
-	data.post_init = imx_chipidea_port_post_init;
-	data.drvdata = dev;
+	ci->data.init = imx_chipidea_port_init;
+	ci->data.post_init = imx_chipidea_port_post_init;
+	ci->data.drvdata = ci;
 
 	portsc = readl(base + 0x184);
 	portsc &= ~MXC_EHCI_PORTSC_MASK;
-	portsc |= pdata->flags & MXC_EHCI_PORTSC_MASK;
+	portsc |= ci->flags & MXC_EHCI_PORTSC_MASK;
 	writel(portsc, base + 0x184);
 
-	imx_chipidea_port_init(dev);
+	imx_chipidea_port_init(ci);
 
-	if ((pdata->flags & MXC_EHCI_PORTSC_MASK) == MXC_EHCI_MODE_ULPI) {
+	if ((ci->flags & MXC_EHCI_PORTSC_MASK) == MXC_EHCI_MODE_ULPI) {
 		dev_dbg(dev, "using ULPI phy\n");
 		if (IS_ENABLED(CONFIG_USB_ULPI)) {
 			ret = ulpi_setup(base + 0x170, 1);
@@ -93,13 +165,13 @@ static int imx_chipidea_probe(struct device_d *dev)
 			return ret;
 	}
 
-	data.hccr = base + 0x100;
-	data.hcor = base + 0x140;
-	data.flags = EHCI_HAS_TT;
+	ci->data.hccr = base + 0x100;
+	ci->data.hcor = base + 0x140;
+	ci->data.flags = EHCI_HAS_TT;
 
-	if (pdata->mode == IMX_USB_MODE_HOST && IS_ENABLED(CONFIG_USB_EHCI)) {
-		ret = ehci_register(dev, &data);
-	} else if (pdata->mode == IMX_USB_MODE_DEVICE && IS_ENABLED(CONFIG_USB_GADGET_DRIVER_ARC)) {
+	if (ci->mode == IMX_USB_MODE_HOST && IS_ENABLED(CONFIG_USB_EHCI)) {
+		ret = ehci_register(dev, &ci->data);
+	} else if (ci->mode == IMX_USB_MODE_DEVICE && IS_ENABLED(CONFIG_USB_GADGET_DRIVER_ARC)) {
 		ret = ci_udc_register(dev, base);
 	} else {
 		dev_err(dev, "No supported role\n");
@@ -109,8 +181,17 @@ static int imx_chipidea_probe(struct device_d *dev)
 	return ret;
 };
 
+static __maybe_unused struct of_device_id imx_chipidea_dt_ids[] = {
+	{
+		.compatible = "fsl,imx27-usb",
+	}, {
+		/* sentinel */
+	},
+};
+
 static struct driver_d imx_chipidea_driver = {
 	.name   = "imx-usb",
 	.probe  = imx_chipidea_probe,
+	.of_compatible = DRV_OF_COMPAT(imx_chipidea_dt_ids),
 };
 device_platform_driver(imx_chipidea_driver);