X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/f8b56bc9d2cf811ccafa1f18d7de35f6698cbb84..86b5f9e15f37d932d9bba3b7ef81ade0085c40dd:/target/linux/generic/files/drivers/net/phy/ar8216.c?ds=inline

diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index 38ccaa36a..ffa561b36 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.c
@@ -29,6 +29,7 @@
 #include <linux/phy.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/lockdep.h>
 #include "ar8216.h"
 
 /* size of the vlan table */
@@ -86,7 +87,7 @@ ar8216_mii_read(struct ar8216_priv *priv, int reg)
 	mutex_lock(&bus->mdio_lock);
 
 	bus->write(bus, 0x18, 0, page);
-	msleep(1); /* wait for the page switch to propagate */
+	usleep_range(1000, 2000); /* wait for the page switch to propagate */
 	lo = bus->read(bus, 0x10 | r2, r1);
 	hi = bus->read(bus, 0x10 | r2, r1 + 1);
 
@@ -110,18 +111,32 @@ ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
 	mutex_lock(&bus->mdio_lock);
 
 	bus->write(bus, 0x18, 0, r3);
-	msleep(1); /* wait for the page switch to propagate */
+	usleep_range(1000, 2000); /* wait for the page switch to propagate */
 	bus->write(bus, 0x10 | r2, r1 + 1, hi);
 	bus->write(bus, 0x10 | r2, r1, lo);
 
 	mutex_unlock(&bus->mdio_lock);
 }
 
+static void
+ar8216_phy_dbg_write(struct ar8216_priv *priv, int phy_addr,
+		     u16 dbg_addr, u16 dbg_data)
+{
+	struct mii_bus *bus = priv->phy->bus;
+
+	mutex_lock(&bus->mdio_lock);
+	bus->write(bus, phy_addr, MII_ATH_DBG_ADDR, dbg_addr);
+	bus->write(bus, phy_addr, MII_ATH_DBG_DATA, dbg_data);
+	mutex_unlock(&bus->mdio_lock);
+}
+
 static u32
 ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 {
 	u32 v;
 
+	lockdep_assert_held(&priv->reg_mutex);
+
 	v = priv->read(priv, reg);
 	v &= ~mask;
 	v |= val;
@@ -137,9 +152,11 @@ ar8216_id_chip(struct ar8216_priv *priv)
 	u16 id;
 	int i;
 
+	priv->chip = UNKNOWN;
+
 	val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 	if (val == ~0)
-		return UNKNOWN;
+		return -ENODEV;
 
 	id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 	for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
@@ -147,21 +164,24 @@ ar8216_id_chip(struct ar8216_priv *priv)
 
 		val = ar8216_mii_read(priv, AR8216_REG_CTRL);
 		if (val == ~0)
-			return UNKNOWN;
+			return -ENODEV;
 
 		t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
 		if (t != id)
-			return UNKNOWN;
+			return -ENODEV;
 	}
 
 	switch (id) {
 	case 0x0101:
-		return AR8216;
+		priv->chip = AR8216;
+		break;
 	case 0x0301:
-		return AR8236;
+		priv->chip = AR8236;
+		break;
 	case 0x1000:
 	case 0x1001:
-		return AR8316;
+		priv->chip = AR8316;
+		break;
 	default:
 		printk(KERN_DEBUG
 			"ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
@@ -170,8 +190,10 @@ ar8216_id_chip(struct ar8216_priv *priv)
 			mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
 			mdiobus_read(priv->phy->bus, priv->phy->addr, 3));
 
-		return UNKNOWN;
+		return -ENODEV;
 	}
+
+	return 0;
 }
 
 static void
@@ -219,7 +241,7 @@ ar8216_read_port_link(struct ar8216_priv *priv, int port,
 
 static int
 ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
-                struct switch_val *val)
+		struct switch_val *val)
 {
 	struct ar8216_priv *priv = to_ar8216(dev);
 	priv->vlan = !!val->value.i;
@@ -228,7 +250,7 @@ ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 
 static int
 ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
-                struct switch_val *val)
+		struct switch_val *val)
 {
 	struct ar8216_priv *priv = to_ar8216(dev);
 	val->value.i = priv->vlan;
@@ -260,7 +282,7 @@ ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
 
 static int
 ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
-                struct switch_val *val)
+	       struct switch_val *val)
 {
 	struct ar8216_priv *priv = to_ar8216(dev);
 	priv->vlan_id[val->port_vlan] = val->value.i;
@@ -269,7 +291,7 @@ ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
 
 static int
 ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
-                struct switch_val *val)
+	       struct switch_val *val)
 {
 	struct ar8216_priv *priv = to_ar8216(dev);
 	val->value.i = priv->vlan_id[val->port_vlan];
@@ -292,8 +314,8 @@ ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
 	struct ar8216_priv *priv = dev->phy_ptr;
 	unsigned char *buf;
 
-    if (unlikely(!priv))
-        goto error;
+	if (unlikely(!priv))
+		goto error;
 
 	if (!priv->vlan)
 		goto send;
@@ -444,9 +466,9 @@ ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
 	for (i = 0; i < val->len; i++) {
 		struct switch_port *p = &val->value.ports[i];
 
-		if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
+		if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED)) {
 			priv->vlan_tagged |= (1 << p->id);
-		else {
+		} else {
 			priv->vlan_tagged &= ~(1 << p->id);
 			priv->pvid[p->id] = val->port_vlan;
 
@@ -468,14 +490,22 @@ static int
 ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
 {
 	int timeout = 20;
+	u32 t = 0;
 
-	while ((priv->read(priv, reg) & mask) != val) {
-		if (timeout-- <= 0) {
-			printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
-			return 1;
-		}
+	while (1) {
+		t = priv->read(priv, reg);
+		if ((t & mask) == val)
+			return 0;
+
+		if (timeout-- <= 0)
+			break;
+
+		udelay(10);
 	}
-	return 0;
+
+	pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n",
+	       (unsigned int) reg, t, mask, val);
+	return -ETIMEDOUT;
 }
 
 static void
@@ -591,11 +621,10 @@ ar8216_hw_apply(struct switch_dev *dev)
 		int egress, ingress;
 		int pvid;
 
-		if (priv->vlan) {
+		if (priv->vlan)
 			pvid = priv->vlan_id[priv->pvid[i]];
-		} else {
+		else
 			pvid = i;
-		}
 
 		if (priv->vlan) {
 			if (priv->vlan_tagged & (1 << i))
@@ -605,11 +634,11 @@ ar8216_hw_apply(struct switch_dev *dev)
 		} else {
 			egress = AR8216_OUT_KEEP;
 		}
-		if (priv->vlan) {
+
+		if (priv->vlan)
 			ingress = AR8216_IN_SECURE;
-		} else {
+		else
 			ingress = AR8216_IN_PORT_ONLY;
-		}
 
 		if (priv->chip == AR8236)
 			ar8236_setup_port(priv, i, egress, ingress, portmask[i],
@@ -623,12 +652,23 @@ ar8216_hw_apply(struct switch_dev *dev)
 }
 
 static int
-ar8236_hw_init(struct ar8216_priv *priv) {
-	static int initialized;
+ar8216_hw_init(struct ar8216_priv *priv)
+{
+	/* XXX: undocumented magic from atheros, required! */
+	priv->write(priv, 0x38, 0xc000050e);
+
+	ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
+		   AR8216_GCTRL_MTU, 1518 + 8 + 2);
+	return 0;
+}
+
+static int
+ar8236_hw_init(struct ar8216_priv *priv)
+{
 	int i;
 	struct mii_bus *bus;
 
-	if (initialized)
+	if (priv->initialized)
 		return 0;
 
 	/* Initialize the PHYs */
@@ -641,12 +681,17 @@ ar8236_hw_init(struct ar8216_priv *priv) {
 	}
 	msleep(1000);
 
-	initialized = true;
+	/* enable jumbo frames */
+	ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
+		   AR8316_GCTRL_MTU, 9018 + 8 + 2);
+
+	priv->initialized = true;
 	return 0;
 }
 
 static int
-ar8316_hw_init(struct ar8216_priv *priv) {
+ar8316_hw_init(struct ar8216_priv *priv)
+{
 	int i;
 	u32 val, newval;
 	struct mii_bus *bus;
@@ -686,14 +731,11 @@ ar8316_hw_init(struct ar8216_priv *priv) {
 		if ((i == 4) && priv->port4_phy &&
 		    priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 			/* work around for phy4 rgmii mode */
-			mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x12);
-			mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x480c);
+			ar8216_phy_dbg_write(priv, i, 0x12, 0x480c);
 			/* rx delay */
-			mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x0);
-			mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x824e);
+			ar8216_phy_dbg_write(priv, i, 0x0, 0x824e);
 			/* tx delay */
-			mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x5);
-			mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
+			ar8216_phy_dbg_write(priv, i, 0x5, 0x3d47);
 			msleep(1000);
 		}
 
@@ -705,11 +747,44 @@ ar8316_hw_init(struct ar8216_priv *priv) {
 		msleep(1000);
 	}
 
+	/* enable jumbo frames */
+	ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
+		   AR8316_GCTRL_MTU, 9018 + 8 + 2);
+
+	/* enable cpu port to receive multicast and broadcast frames */
+	priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
+
 out:
 	priv->initialized = true;
 	return 0;
 }
 
+static void
+ar8216_init_port(struct ar8216_priv *priv, int port)
+{
+	/* Enable port learning and tx */
+	priv->write(priv, AR8216_REG_PORT_CTRL(port),
+		AR8216_PORT_CTRL_LEARN |
+		(4 << AR8216_PORT_CTRL_STATE_S));
+
+	priv->write(priv, AR8216_REG_PORT_VLAN(port), 0);
+
+	if (port == AR8216_PORT_CPU) {
+		priv->write(priv, AR8216_REG_PORT_STATUS(port),
+			AR8216_PORT_STATUS_LINK_UP |
+			((priv->chip == AR8316) ?
+				AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
+			AR8216_PORT_STATUS_TXMAC |
+			AR8216_PORT_STATUS_RXMAC |
+			((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
+			((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
+			AR8216_PORT_STATUS_DUPLEX);
+	} else {
+		priv->write(priv, AR8216_REG_PORT_STATUS(port),
+			AR8216_PORT_STATUS_LINK_AUTO);
+	}
+}
+
 static int
 ar8216_reset_switch(struct switch_dev *dev)
 {
@@ -719,50 +794,14 @@ ar8216_reset_switch(struct switch_dev *dev)
 	mutex_lock(&priv->reg_mutex);
 	memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
 		offsetof(struct ar8216_priv, vlan));
-	for (i = 0; i < AR8X16_MAX_VLANS; i++) {
+
+	for (i = 0; i < AR8X16_MAX_VLANS; i++)
 		priv->vlan_id[i] = i;
-	}
-	for (i = 0; i < AR8216_NUM_PORTS; i++) {
-		/* Enable port learning and tx */
-		priv->write(priv, AR8216_REG_PORT_CTRL(i),
-			AR8216_PORT_CTRL_LEARN |
-			(4 << AR8216_PORT_CTRL_STATE_S));
-
-		priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
-
-		/* Configure all PHYs */
-		if (i == AR8216_PORT_CPU) {
-			priv->write(priv, AR8216_REG_PORT_STATUS(i),
-				AR8216_PORT_STATUS_LINK_UP |
-				((priv->chip == AR8316) ?
-					AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
-				AR8216_PORT_STATUS_TXMAC |
-				AR8216_PORT_STATUS_RXMAC |
-				((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
-				((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
-				AR8216_PORT_STATUS_DUPLEX);
-		} else {
-			priv->write(priv, AR8216_REG_PORT_STATUS(i),
-				AR8216_PORT_STATUS_LINK_AUTO);
-		}
-	}
-	/* XXX: undocumented magic from atheros, required! */
-	priv->write(priv, 0x38, 0xc000050e);
 
-	if (priv->chip == AR8216) {
-		ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
-			AR8216_GCTRL_MTU, 1518 + 8 + 2);
-	} else if (priv->chip == AR8316 ||
-		   priv->chip == AR8236) {
-		/* enable jumbo frames */
-		ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
-			AR8316_GCTRL_MTU, 9018 + 8 + 2);
-	}
+	/* Configure all ports */
+	for (i = 0; i < AR8216_NUM_PORTS; i++)
+		ar8216_init_port(priv, i);
 
-	if (priv->chip == AR8316) {
-		/* enable cpu port to receive multicast and broadcast frames */
-		priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
-	}
 	mutex_unlock(&priv->reg_mutex);
 	return ar8216_hw_apply(dev);
 }
@@ -806,7 +845,9 @@ ar8216_config_init(struct phy_device *pdev)
 
 	priv->phy = pdev;
 
-	priv->chip = ar8216_id_chip(priv);
+	ret = ar8216_id_chip(priv);
+	if (ret)
+		goto err_free_priv;
 
 	if (pdev->addr != 0) {
 		if (priv->chip == AR8316) {
@@ -877,34 +918,26 @@ ar8216_config_init(struct phy_device *pdev)
 		swdev->vlans = AR8216_NUM_VLANS;
 	}
 
-	if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
-		kfree(priv);
-		goto done;
-	}
+	ret = register_switch(&priv->dev, pdev->attached_dev);
+	if (ret)
+		goto err_free_priv;
 
 	priv->init = true;
 
-	if (priv->chip == AR8316) {
+	ret = 0;
+	if (priv->chip == AR8216)
+		ret = ar8216_hw_init(priv);
+	else if (priv->chip == AR8236)
+		ret = ar8236_hw_init(priv);
+	else if (priv->chip == AR8316)
 		ret = ar8316_hw_init(priv);
-		if (ret) {
-			kfree(priv);
-			goto done;
-		}
-	}
 
-	if (priv->chip == AR8236) {
-		ret = ar8236_hw_init(priv);
-		if (ret) {
-			kfree(priv);
-			goto done;
-		}
-	}
+	if (ret)
+		goto err_free_priv;
 
 	ret = ar8216_reset_switch(&priv->dev);
-	if (ret) {
-		kfree(priv);
-		goto done;
-	}
+	if (ret)
+		goto err_free_priv;
 
 	dev->phy_ptr = priv;
 
@@ -921,7 +954,10 @@ ar8216_config_init(struct phy_device *pdev)
 
 	priv->init = false;
 
-done:
+	return 0;
+
+err_free_priv:
+	kfree(priv);
 	return ret;
 }
 
@@ -929,23 +965,37 @@ static int
 ar8216_read_status(struct phy_device *phydev)
 {
 	struct ar8216_priv *priv = phydev->priv;
+	struct switch_port_link link;
 	int ret;
-	if (phydev->addr != 0) {
+
+	if (phydev->addr != 0)
 		return genphy_read_status(phydev);
-	}
 
-	phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
-	phydev->duplex = DUPLEX_FULL;
-	phydev->link = 1;
+	ar8216_read_port_link(priv, phydev->addr, &link);
+	phydev->link = !!link.link;
+	if (!phydev->link)
+		return 0;
+
+	switch (link.speed) {
+	case SWITCH_PORT_SPEED_10:
+		phydev->speed = SPEED_10;
+		break;
+	case SWITCH_PORT_SPEED_100:
+		phydev->speed = SPEED_100;
+		break;
+	case SWITCH_PORT_SPEED_1000:
+		phydev->speed = SPEED_1000;
+		break;
+	default:
+		phydev->speed = 0;
+	}
+	phydev->duplex = link.duplex ? DUPLEX_FULL : DUPLEX_HALF;
 
 	/* flush the address translation unit */
 	mutex_lock(&priv->reg_mutex);
 	ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
-
 	if (!ret)
 		priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
-	else
-		ret = -ETIMEDOUT;
 	mutex_unlock(&priv->reg_mutex);
 
 	phydev->state = PHY_RUNNING;
@@ -968,14 +1018,9 @@ static int
 ar8216_probe(struct phy_device *pdev)
 {
 	struct ar8216_priv priv;
-	u16 chip;
 
 	priv.phy = pdev;
-	chip = ar8216_id_chip(&priv);
-	if (chip == UNKNOWN)
-		return -ENODEV;
-
-	return 0;
+	return ar8216_id_chip(&priv);
 }
 
 static void