1 files changed, 249 insertions, 10 deletions

diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c
index 353e26bea3c3..8f15bc7b1f5f 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.c
+++ b/drivers/net/dsa/mv88e6xxx/global2.c
@@ -501,18 +501,110 @@ static int mv88e6xxx_g2_smi_phy_cmd(struct mv88e6xxx_chip *chip, u16 cmd)
 	return mv88e6xxx_g2_smi_phy_wait(chip);
 }
 
+static int mv88e6xxx_g2_smi_phy_write_addr(struct mv88e6xxx_chip *chip,
+					   int addr, int device, int reg,
+					   bool external)
+{
+	int cmd = SMI_CMD_OP_45_WRITE_ADDR | (addr << 5) | device;
+	int err;
+
+	if (external)
+		cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL;
+
+	err = mv88e6xxx_g2_smi_phy_wait(chip);
+	if (err)
+		return err;
+
+	err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_DATA, reg);
+	if (err)
+		return err;
+
+	return mv88e6xxx_g2_smi_phy_cmd(chip, cmd);
+}
+
+int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip, int addr,
+				  int reg_c45, u16 *val, bool external)
+{
+	int device = (reg_c45 >> 16) & 0x1f;
+	int reg = reg_c45 & 0xffff;
+	int err;
+	u16 cmd;
+
+	err = mv88e6xxx_g2_smi_phy_write_addr(chip, addr, device, reg,
+					      external);
+	if (err)
+		return err;
+
+	cmd = GLOBAL2_SMI_PHY_CMD_OP_45_READ_DATA | (addr << 5) | device;
+
+	if (external)
+		cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL;
+
+	err = mv88e6xxx_g2_smi_phy_cmd(chip, cmd);
+	if (err)
+		return err;
+
+	err = mv88e6xxx_g2_read(chip, GLOBAL2_SMI_PHY_DATA, val);
+	if (err)
+		return err;
+
+	err = *val;
+
+	return 0;
+}
+
+int mv88e6xxx_g2_smi_phy_read_c22(struct mv88e6xxx_chip *chip, int addr,
+				  int reg, u16 *val, bool external)
+{
+	u16 cmd = GLOBAL2_SMI_PHY_CMD_OP_22_READ_DATA | (addr << 5) | reg;
+	int err;
+
+	if (external)
+		cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL;
+
+	err = mv88e6xxx_g2_smi_phy_wait(chip);
+	if (err)
+		return err;
+
+	err = mv88e6xxx_g2_smi_phy_cmd(chip, cmd);
+	if (err)
+		return err;
+
+	return mv88e6xxx_g2_read(chip, GLOBAL2_SMI_PHY_DATA, val);
+}
+
 int mv88e6xxx_g2_smi_phy_read(struct mv88e6xxx_chip *chip,
 			      struct mii_bus *bus,
 			      int addr, int reg, u16 *val)
 {
-	u16 cmd = GLOBAL2_SMI_PHY_CMD_OP_22_READ_DATA | (addr << 5) | reg;
 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	bool external = mdio_bus->external;
+
+	if (reg & MII_ADDR_C45)
+		return mv88e6xxx_g2_smi_phy_read_c45(chip, addr, reg, val,
+						     external);
+	return mv88e6xxx_g2_smi_phy_read_c22(chip, addr, reg, val, external);
+}
+
+int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip, int addr,
+				   int reg_c45, u16 val, bool external)
+{
+	int device = (reg_c45 >> 16) & 0x1f;
+	int reg = reg_c45 & 0xffff;
 	int err;
+	u16 cmd;
+
+	err = mv88e6xxx_g2_smi_phy_write_addr(chip, addr, device, reg,
+					      external);
+	if (err)
+		return err;
 
-	if (mdio_bus->external)
+	cmd = GLOBAL2_SMI_PHY_CMD_OP_45_WRITE_DATA | (addr << 5) | device;
+
+	if (external)
 		cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL;
 
-	err = mv88e6xxx_g2_smi_phy_wait(chip);
+	err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_DATA, val);
 	if (err)
 		return err;
 
@@ -520,18 +612,16 @@ int mv88e6xxx_g2_smi_phy_read(struct mv88e6xxx_chip *chip,
 	if (err)
 		return err;
 
-	return mv88e6xxx_g2_read(chip, GLOBAL2_SMI_PHY_DATA, val);
+	return 0;
 }
 
-int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip,
-			       struct mii_bus *bus,
-			       int addr, int reg, u16 val)
+int mv88e6xxx_g2_smi_phy_write_c22(struct mv88e6xxx_chip *chip, int addr,
+				   int reg, u16 val, bool external)
 {
 	u16 cmd = GLOBAL2_SMI_PHY_CMD_OP_22_WRITE_DATA | (addr << 5) | reg;
-	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
 	int err;
 
-	if (mdio_bus->external)
+	if (external)
 		cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL;
 
 	err = mv88e6xxx_g2_smi_phy_wait(chip);
@@ -545,6 +635,153 @@ int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_g2_smi_phy_cmd(chip, cmd);
 }
 
+int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip,
+			       struct mii_bus *bus,
+			       int addr, int reg, u16 val)
+{
+	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	bool external = mdio_bus->external;
+
+	if (reg & MII_ADDR_C45)
+		return mv88e6xxx_g2_smi_phy_write_c45(chip, addr, reg, val,
+						      external);
+
+	return mv88e6xxx_g2_smi_phy_write_c22(chip, addr, reg, val, external);
+}
+
+static int mv88e6097_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
+{
+	u16 reg;
+
+	mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
+
+	dev_info(chip->dev, "Watchdog event: 0x%04x", reg);
+
+	return IRQ_HANDLED;
+}
+
+static void mv88e6097_watchdog_free(struct mv88e6xxx_chip *chip)
+{
+	u16 reg;
+
+	mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
+
+	reg &= ~(GLOBAL2_WDOG_CONTROL_EGRESS_ENABLE |
+		 GLOBAL2_WDOG_CONTROL_QC_ENABLE);
+
+	mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, reg);
+}
+
+static int mv88e6097_watchdog_setup(struct mv88e6xxx_chip *chip)
+{
+	return mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL,
+				  GLOBAL2_WDOG_CONTROL_EGRESS_ENABLE |
+				  GLOBAL2_WDOG_CONTROL_QC_ENABLE |
+				  GLOBAL2_WDOG_CONTROL_SWRESET);
+}
+
+const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = {
+	.irq_action = mv88e6097_watchdog_action,
+	.irq_setup = mv88e6097_watchdog_setup,
+	.irq_free = mv88e6097_watchdog_free,
+};
+
+static int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip)
+{
+	return mv88e6xxx_g2_update(chip, GLOBAL2_WDOG_CONTROL,
+				   GLOBAL2_WDOG_INT_ENABLE |
+				   GLOBAL2_WDOG_CUT_THROUGH |
+				   GLOBAL2_WDOG_QUEUE_CONTROLLER |
+				   GLOBAL2_WDOG_EGRESS |
+				   GLOBAL2_WDOG_FORCE_IRQ);
+}
+
+static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
+{
+	int err;
+	u16 reg;
+
+	mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_EVENT);
+	err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
+
+	dev_info(chip->dev, "Watchdog event: 0x%04x",
+		 reg & GLOBAL2_WDOG_DATA_MASK);
+
+	mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_HISTORY);
+	err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
+
+	dev_info(chip->dev, "Watchdog history: 0x%04x",
+		 reg & GLOBAL2_WDOG_DATA_MASK);
+
+	/* Trigger a software reset to try to recover the switch */
+	if (chip->info->ops->reset)
+		chip->info->ops->reset(chip);
+
+	mv88e6390_watchdog_setup(chip);
+
+	return IRQ_HANDLED;
+}
+
+static void mv88e6390_watchdog_free(struct mv88e6xxx_chip *chip)
+{
+	mv88e6xxx_g2_update(chip, GLOBAL2_WDOG_CONTROL,
+			    GLOBAL2_WDOG_INT_ENABLE);
+}
+
+const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = {
+	.irq_action = mv88e6390_watchdog_action,
+	.irq_setup = mv88e6390_watchdog_setup,
+	.irq_free = mv88e6390_watchdog_free,
+};
+
+static irqreturn_t mv88e6xxx_g2_watchdog_thread_fn(int irq, void *dev_id)
+{
+	struct mv88e6xxx_chip *chip = dev_id;
+	irqreturn_t ret = IRQ_NONE;
+
+	mutex_lock(&chip->reg_lock);
+	if (chip->info->ops->watchdog_ops->irq_action)
+		ret = chip->info->ops->watchdog_ops->irq_action(chip, irq);
+	mutex_unlock(&chip->reg_lock);
+
+	return ret;
+}
+
+static void mv88e6xxx_g2_watchdog_free(struct mv88e6xxx_chip *chip)
+{
+	mutex_lock(&chip->reg_lock);
+	if (chip->info->ops->watchdog_ops->irq_free)
+		chip->info->ops->watchdog_ops->irq_free(chip);
+	mutex_unlock(&chip->reg_lock);
+
+	free_irq(chip->watchdog_irq, chip);
+	irq_dispose_mapping(chip->watchdog_irq);
+}
+
+static int mv88e6xxx_g2_watchdog_setup(struct mv88e6xxx_chip *chip)
+{
+	int err;
+
+	chip->watchdog_irq = irq_find_mapping(chip->g2_irq.domain,
+					      GLOBAL2_INT_SOURCE_WATCHDOG);
+	if (chip->watchdog_irq < 0)
+		return chip->watchdog_irq;
+
+	err = request_threaded_irq(chip->watchdog_irq, NULL,
+				   mv88e6xxx_g2_watchdog_thread_fn,
+				   IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
+				   "mv88e6xxx-watchdog", chip);
+	if (err)
+		return err;
+
+	mutex_lock(&chip->reg_lock);
+	if (chip->info->ops->watchdog_ops->irq_setup)
+		err = chip->info->ops->watchdog_ops->irq_setup(chip);
+	mutex_unlock(&chip->reg_lock);
+
+	return err;
+}
+
 static void mv88e6xxx_g2_irq_mask(struct irq_data *d)
 {
 	struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
@@ -633,6 +870,8 @@ void mv88e6xxx_g2_irq_free(struct mv88e6xxx_chip *chip)
 {
 	int irq, virq;
 
+	mv88e6xxx_g2_watchdog_free(chip);
+
 	free_irq(chip->device_irq, chip);
 	irq_dispose_mapping(chip->device_irq);
 
@@ -675,7 +914,7 @@ int mv88e6xxx_g2_irq_setup(struct mv88e6xxx_chip *chip)
 	if (err)
 		goto out;
 
-	return 0;
+	return mv88e6xxx_g2_watchdog_setup(chip);
 
 out:
 	for (irq = 0; irq < 16; irq++) {