1 files changed, 221 insertions, 48 deletions

diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
index f5c1f2983a1d..491bbd46c5b3 100644
--- a/drivers/phy/broadcom/phy-brcm-usb.c
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/soc/brcmstb/brcmstb.h>
 #include <dt-bindings/phy/phy.h>
+#include <linux/mfd/syscon.h>
 
 #include "phy-brcm-usb-init.h"
 
@@ -32,6 +33,12 @@ struct value_to_name_map {
 	const char *name;
 };
 
+struct match_chip_info {
+	void *init_func;
+	u8 required_regs[BRCM_REGS_MAX + 1];
+	u8 optional_reg;
+};
+
 static struct value_to_name_map brcm_dr_mode_to_name[] = {
 	{ USB_CTLR_MODE_HOST, "host" },
 	{ USB_CTLR_MODE_DEVICE, "peripheral" },
@@ -57,11 +64,26 @@ struct brcm_usb_phy_data {
 	bool			has_xhci;
 	struct clk		*usb_20_clk;
 	struct clk		*usb_30_clk;
+	struct clk		*suspend_clk;
 	struct mutex		mutex;	/* serialize phy init */
 	int			init_count;
+	int			wake_irq;
 	struct brcm_usb_phy	phys[BRCM_USB_PHY_ID_MAX];
 };
 
+static s8 *node_reg_names[BRCM_REGS_MAX] = {
+	"crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
+};
+
+static irqreturn_t brcm_usb_phy_wake_isr(int irq, void *dev_id)
+{
+	struct phy *gphy = dev_id;
+
+	pm_wakeup_event(&gphy->dev, 0);
+
+	return IRQ_HANDLED;
+}
+
 static int brcm_usb_phy_init(struct phy *gphy)
 {
 	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
@@ -74,8 +96,9 @@ static int brcm_usb_phy_init(struct phy *gphy)
 	 */
 	mutex_lock(&priv->mutex);
 	if (priv->init_count++ == 0) {
-		clk_enable(priv->usb_20_clk);
-		clk_enable(priv->usb_30_clk);
+		clk_prepare_enable(priv->usb_20_clk);
+		clk_prepare_enable(priv->usb_30_clk);
+		clk_prepare_enable(priv->suspend_clk);
 		brcm_usb_init_common(&priv->ini);
 	}
 	mutex_unlock(&priv->mutex);
@@ -106,8 +129,9 @@ static int brcm_usb_phy_exit(struct phy *gphy)
 	mutex_lock(&priv->mutex);
 	if (--priv->init_count == 0) {
 		brcm_usb_uninit_common(&priv->ini);
-		clk_disable(priv->usb_20_clk);
-		clk_disable(priv->usb_30_clk);
+		clk_disable_unprepare(priv->usb_20_clk);
+		clk_disable_unprepare(priv->usb_30_clk);
+		clk_disable_unprepare(priv->suspend_clk);
 	}
 	mutex_unlock(&priv->mutex);
 	phy->inited = false;
@@ -194,7 +218,7 @@ static ssize_t dual_select_store(struct device *dev,
 	res = name_to_value(&brcm_dual_mode_to_name[0],
 			    ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
 	if (!res) {
-		brcm_usb_init_set_dual_select(&priv->ini, value);
+		brcm_usb_set_dual_select(&priv->ini, value);
 		res = len;
 	}
 	mutex_unlock(&sysfs_lock);
@@ -209,7 +233,7 @@ static ssize_t dual_select_show(struct device *dev,
 	int value;
 
 	mutex_lock(&sysfs_lock);
-	value = brcm_usb_init_get_dual_select(&priv->ini);
+	value = brcm_usb_get_dual_select(&priv->ini);
 	mutex_unlock(&sysfs_lock);
 	return sprintf(buf, "%s\n",
 		value_to_name(&brcm_dual_mode_to_name[0],
@@ -228,15 +252,106 @@ static const struct attribute_group brcm_usb_phy_group = {
 	.attrs = brcm_usb_phy_attrs,
 };
 
-static int brcm_usb_phy_dvr_init(struct device *dev,
+static struct match_chip_info chip_info_7216 = {
+	.init_func = &brcm_usb_dvr_init_7216,
+	.required_regs = {
+		BRCM_REGS_CTRL,
+		BRCM_REGS_XHCI_EC,
+		BRCM_REGS_XHCI_GBL,
+		-1,
+	},
+};
+
+static struct match_chip_info chip_info_7211b0 = {
+	.init_func = &brcm_usb_dvr_init_7211b0,
+	.required_regs = {
+		BRCM_REGS_CTRL,
+		BRCM_REGS_XHCI_EC,
+		BRCM_REGS_XHCI_GBL,
+		BRCM_REGS_USB_PHY,
+		BRCM_REGS_USB_MDIO,
+		-1,
+	},
+	.optional_reg = BRCM_REGS_BDC_EC,
+};
+
+static struct match_chip_info chip_info_7445 = {
+	.init_func = &brcm_usb_dvr_init_7445,
+	.required_regs = {
+		BRCM_REGS_CTRL,
+		BRCM_REGS_XHCI_EC,
+		-1,
+	},
+};
+
+static const struct of_device_id brcm_usb_dt_ids[] = {
+	{
+		.compatible = "brcm,bcm7216-usb-phy",
+		.data = &chip_info_7216,
+	},
+	{
+		.compatible = "brcm,bcm7211-usb-phy",
+		.data = &chip_info_7211b0,
+	},
+	{
+		.compatible = "brcm,brcmstb-usb-phy",
+		.data = &chip_info_7445,
+	},
+	{ /* sentinel */ }
+};
+
+static int brcm_usb_get_regs(struct platform_device *pdev,
+			     enum brcmusb_reg_sel regs,
+			     struct  brcm_usb_init_params *ini,
+			     bool optional)
+{
+	struct resource *res;
+
+	/* Older DT nodes have ctrl and optional xhci_ec by index only */
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						node_reg_names[regs]);
+	if (res == NULL) {
+		if (regs == BRCM_REGS_CTRL) {
+			res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		} else if (regs == BRCM_REGS_XHCI_EC) {
+			res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+			/* XHCI_EC registers are optional */
+			if (res == NULL)
+				return 0;
+		}
+		if (res == NULL) {
+			if (optional) {
+				dev_dbg(&pdev->dev,
+					"Optional reg %s not found\n",
+					node_reg_names[regs]);
+				return 0;
+			}
+			dev_err(&pdev->dev, "can't get %s base addr\n",
+				node_reg_names[regs]);
+			return 1;
+		}
+	}
+	ini->regs[regs] = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ini->regs[regs])) {
+		dev_err(&pdev->dev, "can't map %s register space\n",
+			node_reg_names[regs]);
+		return 1;
+	}
+	return 0;
+}
+
+static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
 				 struct brcm_usb_phy_data *priv,
 				 struct device_node *dn)
 {
-	struct phy *gphy;
+	struct device *dev = &pdev->dev;
+	struct phy *gphy = NULL;
 	int err;
 
 	priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
 	if (IS_ERR(priv->usb_20_clk)) {
+		if (PTR_ERR(priv->usb_20_clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
 		dev_info(dev, "Clock not found in Device Tree\n");
 		priv->usb_20_clk = NULL;
 	}
@@ -267,6 +382,8 @@ static int brcm_usb_phy_dvr_init(struct device *dev,
 
 		priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
 		if (IS_ERR(priv->usb_30_clk)) {
+			if (PTR_ERR(priv->usb_30_clk) == -EPROBE_DEFER)
+				return -EPROBE_DEFER;
 			dev_info(dev,
 				 "USB3.0 clock not found in Device Tree\n");
 			priv->usb_30_clk = NULL;
@@ -275,18 +392,46 @@ static int brcm_usb_phy_dvr_init(struct device *dev,
 		if (err)
 			return err;
 	}
+
+	priv->suspend_clk = clk_get(dev, "usb0_freerun");
+	if (IS_ERR(priv->suspend_clk)) {
+		if (PTR_ERR(priv->suspend_clk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(dev, "Suspend Clock not found in Device Tree\n");
+		priv->suspend_clk = NULL;
+	}
+
+	priv->wake_irq = platform_get_irq_byname(pdev, "wake");
+	if (priv->wake_irq < 0)
+		priv->wake_irq = platform_get_irq_byname(pdev, "wakeup");
+	if (priv->wake_irq >= 0) {
+		err = devm_request_irq(dev, priv->wake_irq,
+				       brcm_usb_phy_wake_isr, 0,
+				       dev_name(dev), gphy);
+		if (err < 0)
+			return err;
+		device_set_wakeup_capable(dev, 1);
+	} else {
+		dev_info(dev,
+			 "Wake interrupt missing, system wake not supported\n");
+	}
+
 	return 0;
 }
 
 static int brcm_usb_phy_probe(struct platform_device *pdev)
 {
-	struct resource *res;
 	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;
+	void (*dvr_init)(struct brcm_usb_init_params *params);
+	const struct match_chip_info *info;
+	struct regmap *rmap;
+	int x;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -295,30 +440,14 @@ 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_set_family_map(&priv->ini);
+
+	match = of_match_node(brcm_usb_dt_ids, dev->of_node);
+	info = match->data;
+	dvr_init = info->init_func;
+	(*dvr_init)(&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;
-	}
-	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
-	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) {
-		priv->ini.xhci_ec_regs =
-			devm_ioremap_resource(dev, res);
-		if (IS_ERR(priv->ini.xhci_ec_regs)) {
-			dev_err(dev, "can't map XHCI EC 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);
@@ -335,7 +464,23 @@ static int brcm_usb_phy_probe(struct platform_device *pdev)
 	if (of_property_read_bool(dn, "brcm,has-eohci"))
 		priv->has_eohci = true;
 
-	err = brcm_usb_phy_dvr_init(dev, priv, dn);
+	for (x = 0; x < BRCM_REGS_MAX; x++) {
+		if (info->required_regs[x] >= BRCM_REGS_MAX)
+			break;
+
+		err = brcm_usb_get_regs(pdev, info->required_regs[x],
+					&priv->ini, false);
+		if (err)
+			return -EINVAL;
+	}
+	if (info->optional_reg) {
+		err = brcm_usb_get_regs(pdev, info->optional_reg,
+					&priv->ini, true);
+		if (err)
+			return -EINVAL;
+	}
+
+	err = brcm_usb_phy_dvr_init(pdev, priv, dn);
 	if (err)
 		return err;
 
@@ -354,14 +499,23 @@ static int brcm_usb_phy_probe(struct platform_device *pdev)
 	if (err)
 		dev_warn(dev, "Error creating sysfs attributes\n");
 
+	/* Get piarbctl syscon if it exists */
+	rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
+						 "syscon-piarbctl");
+	if (IS_ERR(rmap))
+		rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
+						       "brcm,syscon-piarbctl");
+	if (!IS_ERR(rmap))
+		priv->ini.syscon_piarbctl = rmap;
+
 	/* start with everything off */
 	if (priv->has_xhci)
 		brcm_usb_uninit_xhci(&priv->ini);
 	if (priv->has_eohci)
 		brcm_usb_uninit_eohci(&priv->ini);
 	brcm_usb_uninit_common(&priv->ini);
-	clk_disable(priv->usb_20_clk);
-	clk_disable(priv->usb_30_clk);
+	clk_disable_unprepare(priv->usb_20_clk);
+	clk_disable_unprepare(priv->usb_30_clk);
 
 	phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
 
@@ -381,8 +535,28 @@ static int brcm_usb_phy_suspend(struct device *dev)
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 
 	if (priv->init_count) {
-		clk_disable(priv->usb_20_clk);
-		clk_disable(priv->usb_30_clk);
+		priv->ini.wake_enabled = device_may_wakeup(dev);
+		if (priv->phys[BRCM_USB_PHY_3_0].inited)
+			brcm_usb_uninit_xhci(&priv->ini);
+		if (priv->phys[BRCM_USB_PHY_2_0].inited)
+			brcm_usb_uninit_eohci(&priv->ini);
+		brcm_usb_uninit_common(&priv->ini);
+
+		/*
+		 * Handle the clocks unless needed for wake. This has
+		 * to work for both older XHCI->3.0-clks, EOHCI->2.0-clks
+		 * and newer XHCI->2.0-clks/3.0-clks.
+		 */
+
+		if (!priv->ini.suspend_with_clocks) {
+			if (priv->phys[BRCM_USB_PHY_3_0].inited)
+				clk_disable_unprepare(priv->usb_30_clk);
+			if (priv->phys[BRCM_USB_PHY_2_0].inited ||
+			    !priv->has_eohci)
+				clk_disable_unprepare(priv->usb_20_clk);
+		}
+		if (priv->wake_irq >= 0)
+			enable_irq_wake(priv->wake_irq);
 	}
 	return 0;
 }
@@ -391,8 +565,8 @@ static int brcm_usb_phy_resume(struct device *dev)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 
-	clk_enable(priv->usb_20_clk);
-	clk_enable(priv->usb_30_clk);
+	clk_prepare_enable(priv->usb_20_clk);
+	clk_prepare_enable(priv->usb_30_clk);
 	brcm_usb_init_ipp(&priv->ini);
 
 	/*
@@ -400,18 +574,22 @@ static int brcm_usb_phy_resume(struct device *dev)
 	 * Uninitialize anything that wasn't previously initialized.
 	 */
 	if (priv->init_count) {
+		if (priv->wake_irq >= 0)
+			disable_irq_wake(priv->wake_irq);
 		brcm_usb_init_common(&priv->ini);
 		if (priv->phys[BRCM_USB_PHY_2_0].inited) {
 			brcm_usb_init_eohci(&priv->ini);
 		} else if (priv->has_eohci) {
 			brcm_usb_uninit_eohci(&priv->ini);
-			clk_disable(priv->usb_20_clk);
+			clk_disable_unprepare(priv->usb_20_clk);
 		}
 		if (priv->phys[BRCM_USB_PHY_3_0].inited) {
 			brcm_usb_init_xhci(&priv->ini);
 		} else if (priv->has_xhci) {
 			brcm_usb_uninit_xhci(&priv->ini);
-			clk_disable(priv->usb_30_clk);
+			clk_disable_unprepare(priv->usb_30_clk);
+			if (!priv->has_eohci)
+				clk_disable_unprepare(priv->usb_20_clk);
 		}
 	} else {
 		if (priv->has_xhci)
@@ -419,10 +597,10 @@ static int brcm_usb_phy_resume(struct device *dev)
 		if (priv->has_eohci)
 			brcm_usb_uninit_eohci(&priv->ini);
 		brcm_usb_uninit_common(&priv->ini);
-		clk_disable(priv->usb_20_clk);
-		clk_disable(priv->usb_30_clk);
+		clk_disable_unprepare(priv->usb_20_clk);
+		clk_disable_unprepare(priv->usb_30_clk);
 	}
-
+	priv->ini.wake_enabled = false;
 	return 0;
 }
 #endif /* CONFIG_PM_SLEEP */
@@ -431,11 +609,6 @@ 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 = {