phy: usb: Add support for new Synopsys USB controller on the 7216

The 7216 has the new USB XHCI controller from Synopsys. While
this new controller and the PHY are similar to the STB versions,
the major differences are:

- Many of the registers and fields in the CTRL block have been
  removed or changed.
- A new set of Synopsys control registers, BCHP_USB_XHCI_GBL, were
  added.
- MDIO functionality has been replaced with direct access registers
  in the BCHP_USB_XHCI_GBL block.
- Power up PHY defaults that had to be changed by MDIO in previous
  chips will now power up with the correct defaults.

A new init module was created for this new Synopsys USB controller.
A new compatible string was added and the driver will dispatch
into one of two init modules based on it. A "reg-names" field was
added so the driver can more easily get optional registers.
A DT bindings document was also added for this driver.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 53 insertions, 17 deletions

diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
index 9d93c5599511..64379ede480e 100644
--- a/drivers/phy/broadcom/phy-brcm-usb.c
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -241,6 +241,15 @@ static const struct attribute_group brcm_usb_phy_group = {
 	.attrs = brcm_usb_phy_attrs,
 };
 
+static const struct of_device_id brcm_usb_dt_ids[] = {
+	{
+		.compatible = "brcm,bcm7216-usb-phy",
+		.data = &brcm_usb_dvr_init_7216,
+	},
+	{ .compatible = "brcm,brcmstb-usb-phy" },
+	{ /* sentinel */ }
+};
+
 static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
 				 struct brcm_usb_phy_data *priv,
 				 struct device_node *dn)
@@ -316,13 +325,16 @@ static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
 
 static int brcm_usb_phy_probe(struct platform_device *pdev)
 {
-	struct resource *res;
+	struct resource *res_ctrl;
+	struct resource *res_xhciec = NULL;
+	struct resource *res_xhcigbl = NULL;
 	struct device *dev = &pdev->dev;
 	struct brcm_usb_phy_data *priv;
 	struct phy_provider *phy_provider;
 	struct device_node *dn = pdev->dev.of_node;
 	int err;
 	const char *mode;
+	const struct of_device_id *match;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -331,30 +343,59 @@ static int brcm_usb_phy_probe(struct platform_device *pdev)
 
 	priv->ini.family_id = brcmstb_get_family_id();
 	priv->ini.product_id = brcmstb_get_product_id();
-	brcm_usb_dvr_init_7445(&priv->ini);
+
+	match = of_match_node(brcm_usb_dt_ids, dev->of_node);
+	if (match && match->data) {
+		void (*dvr_init)(struct brcm_usb_init_params *params);
+
+		dvr_init = match->data;
+		(*dvr_init)(&priv->ini);
+	} else {
+		brcm_usb_dvr_init_7445(&priv->ini);
+	}
+
 	dev_dbg(dev, "Best mapping table is for %s\n",
 		priv->ini.family_name);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "can't get USB_CTRL base address\n");
-		return -EINVAL;
+
+	/* Newer DT node has reg-names. xhci_ec and xhci_gbl are optional. */
+	res_ctrl = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
+	if (res_ctrl != NULL) {
+		res_xhciec = platform_get_resource_byname(pdev,
+							  IORESOURCE_MEM,
+							  "xhci_ec");
+		res_xhcigbl = platform_get_resource_byname(pdev,
+							   IORESOURCE_MEM,
+							   "xhci_gbl");
+	} else {
+		/* Older DT node without reg-names, use index */
+		res_ctrl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		if (res_ctrl == NULL) {
+			dev_err(dev, "can't get CTRL base address\n");
+			return -EINVAL;
+		}
+		res_xhciec = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	}
-	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
+	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res_ctrl);
 	if (IS_ERR(priv->ini.ctrl_regs)) {
 		dev_err(dev, "can't map CTRL register space\n");
 		return -EINVAL;
 	}
-
-	/* The XHCI EC registers are optional */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (res) {
+	if (res_xhciec) {
 		priv->ini.xhci_ec_regs =
-			devm_ioremap_resource(dev, res);
+			devm_ioremap_resource(dev, res_xhciec);
 		if (IS_ERR(priv->ini.xhci_ec_regs)) {
 			dev_err(dev, "can't map XHCI EC register space\n");
 			return -EINVAL;
 		}
 	}
+	if (res_xhcigbl) {
+		priv->ini.xhci_gbl_regs =
+			devm_ioremap_resource(dev, res_xhcigbl);
+		if (IS_ERR(priv->ini.xhci_gbl_regs)) {
+			dev_err(dev, "can't map XHCI Global register space\n");
+			return -EINVAL;
+		}
+	}
 
 	of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
 	of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
@@ -480,11 +521,6 @@ static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
 	SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
 };
 
-static const struct of_device_id brcm_usb_dt_ids[] = {
-	{ .compatible = "brcm,brcmstb-usb-phy" },
-	{ /* sentinel */ }
-};
-
 MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
 
 static struct platform_driver brcm_usb_driver = {