1 files changed, 60 insertions, 219 deletions

diff --git a/drivers/net/dsa/realtek/realtek-smi.c b/drivers/net/dsa/realtek/realtek-smi.c
index 755546ed8d..88590ae95a 100644
--- a/drivers/net/dsa/realtek/realtek-smi.c
+++ b/drivers/net/dsa/realtek/realtek-smi.c
@@ -31,7 +31,6 @@
 #include <linux/spinlock.h>
 #include <linux/skbuff.h>
 #include <linux/of.h>
-#include <linux/of_mdio.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
@@ -40,12 +39,14 @@
 #include <linux/if_bridge.h>
 
 #include "realtek.h"
+#include "realtek-smi.h"
+#include "rtl83xx.h"
 
 #define REALTEK_SMI_ACK_RETRY_COUNT		5
 
 static inline void realtek_smi_clk_delay(struct realtek_priv *priv)
 {
-	ndelay(priv->clk_delay);
+	ndelay(priv->variant->clk_delay);
 }
 
 static void realtek_smi_start(struct realtek_priv *priv)
@@ -208,7 +209,7 @@ static int realtek_smi_read_reg(struct realtek_priv *priv, u32 addr, u32 *data)
 	realtek_smi_start(priv);
 
 	/* Send READ command */
-	ret = realtek_smi_write_byte(priv, priv->cmd_read);
+	ret = realtek_smi_write_byte(priv, priv->variant->cmd_read);
 	if (ret)
 		goto out;
 
@@ -249,7 +250,7 @@ static int realtek_smi_write_reg(struct realtek_priv *priv,
 	realtek_smi_start(priv);
 
 	/* Send WRITE command */
-	ret = realtek_smi_write_byte(priv, priv->cmd_write);
+	ret = realtek_smi_write_byte(priv, priv->variant->cmd_write);
 	if (ret)
 		goto out;
 
@@ -310,258 +311,98 @@ static int realtek_smi_read(void *ctx, u32 reg, u32 *val)
 	return realtek_smi_read_reg(priv, reg, val);
 }
 
-static void realtek_smi_lock(void *ctx)
-{
-	struct realtek_priv *priv = ctx;
-
-	mutex_lock(&priv->map_lock);
-}
-
-static void realtek_smi_unlock(void *ctx)
-{
-	struct realtek_priv *priv = ctx;
-
-	mutex_unlock(&priv->map_lock);
-}
-
-static const struct regmap_config realtek_smi_regmap_config = {
-	.reg_bits = 10, /* A4..A0 R4..R0 */
-	.val_bits = 16,
-	.reg_stride = 1,
-	/* PHY regs are at 0x8000 */
-	.max_register = 0xffff,
-	.reg_format_endian = REGMAP_ENDIAN_BIG,
+static const struct realtek_interface_info realtek_smi_info = {
 	.reg_read = realtek_smi_read,
 	.reg_write = realtek_smi_write,
-	.cache_type = REGCACHE_NONE,
-	.lock = realtek_smi_lock,
-	.unlock = realtek_smi_unlock,
 };
 
-static const struct regmap_config realtek_smi_nolock_regmap_config = {
-	.reg_bits = 10, /* A4..A0 R4..R0 */
-	.val_bits = 16,
-	.reg_stride = 1,
-	/* PHY regs are at 0x8000 */
-	.max_register = 0xffff,
-	.reg_format_endian = REGMAP_ENDIAN_BIG,
-	.reg_read = realtek_smi_read,
-	.reg_write = realtek_smi_write,
-	.cache_type = REGCACHE_NONE,
-	.disable_locking = true,
-};
-
-static int realtek_smi_mdio_read(struct mii_bus *bus, int addr, int regnum)
-{
-	struct realtek_priv *priv = bus->priv;
-
-	return priv->ops->phy_read(priv, addr, regnum);
-}
-
-static int realtek_smi_mdio_write(struct mii_bus *bus, int addr, int regnum,
-				  u16 val)
-{
-	struct realtek_priv *priv = bus->priv;
-
-	return priv->ops->phy_write(priv, addr, regnum, val);
-}
-
-static int realtek_smi_setup_mdio(struct dsa_switch *ds)
-{
-	struct realtek_priv *priv =  ds->priv;
-	struct device_node *mdio_np;
-	int ret;
-
-	mdio_np = of_get_compatible_child(priv->dev->of_node, "realtek,smi-mdio");
-	if (!mdio_np) {
-		dev_err(priv->dev, "no MDIO bus node\n");
-		return -ENODEV;
-	}
-
-	priv->user_mii_bus = devm_mdiobus_alloc(priv->dev);
-	if (!priv->user_mii_bus) {
-		ret = -ENOMEM;
-		goto err_put_node;
-	}
-	priv->user_mii_bus->priv = priv;
-	priv->user_mii_bus->name = "SMI user MII";
-	priv->user_mii_bus->read = realtek_smi_mdio_read;
-	priv->user_mii_bus->write = realtek_smi_mdio_write;
-	snprintf(priv->user_mii_bus->id, MII_BUS_ID_SIZE, "SMI-%d",
-		 ds->index);
-	priv->user_mii_bus->dev.of_node = mdio_np;
-	priv->user_mii_bus->parent = priv->dev;
-	ds->user_mii_bus = priv->user_mii_bus;
-
-	ret = devm_of_mdiobus_register(priv->dev, priv->user_mii_bus, mdio_np);
-	if (ret) {
-		dev_err(priv->dev, "unable to register MDIO bus %s\n",
-			priv->user_mii_bus->id);
-		goto err_put_node;
-	}
-
-	return 0;
-
-err_put_node:
-	of_node_put(mdio_np);
-
-	return ret;
-}
-
-static int realtek_smi_probe(struct platform_device *pdev)
+/**
+ * realtek_smi_probe() - Probe a platform device for an SMI-connected switch
+ * @pdev: platform_device to probe on.
+ *
+ * This function should be used as the .probe in a platform_driver. After
+ * calling the common probe function for both interfaces, it initializes the
+ * values specific for SMI-connected devices. Finally, it calls a common
+ * function to register the DSA switch.
+ *
+ * Context: Can sleep. Takes and releases priv->map_lock.
+ * Return: Returns 0 on success, a negative error on failure.
+ */
+int realtek_smi_probe(struct platform_device *pdev)
 {
-	const struct realtek_variant *var;
 	struct device *dev = &pdev->dev;
 	struct realtek_priv *priv;
-	struct regmap_config rc;
-	struct device_node *np;
 	int ret;
 
-	var = of_device_get_match_data(dev);
-	np = dev->of_node;
-
-	priv = devm_kzalloc(dev, sizeof(*priv) + var->chip_data_sz, GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-	priv->chip_data = (void *)priv + sizeof(*priv);
-
-	mutex_init(&priv->map_lock);
-
-	rc = realtek_smi_regmap_config;
-	rc.lock_arg = priv;
-	priv->map = devm_regmap_init(dev, NULL, priv, &rc);
-	if (IS_ERR(priv->map)) {
-		ret = PTR_ERR(priv->map);
-		dev_err(dev, "regmap init failed: %d\n", ret);
-		return ret;
-	}
-
-	rc = realtek_smi_nolock_regmap_config;
-	priv->map_nolock = devm_regmap_init(dev, NULL, priv, &rc);
-	if (IS_ERR(priv->map_nolock)) {
-		ret = PTR_ERR(priv->map_nolock);
-		dev_err(dev, "regmap init failed: %d\n", ret);
-		return ret;
-	}
-
-	/* Link forward and backward */
-	priv->dev = dev;
-	priv->clk_delay = var->clk_delay;
-	priv->cmd_read = var->cmd_read;
-	priv->cmd_write = var->cmd_write;
-	priv->ops = var->ops;
-
-	priv->setup_interface = realtek_smi_setup_mdio;
-	priv->write_reg_noack = realtek_smi_write_reg_noack;
-
-	dev_set_drvdata(dev, priv);
-	spin_lock_init(&priv->lock);
-
-	/* TODO: if power is software controlled, set up any regulators here */
-
-	priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(priv->reset)) {
-		dev_err(dev, "failed to get RESET GPIO\n");
-		return PTR_ERR(priv->reset);
-	}
-	if (priv->reset) {
-		gpiod_set_value(priv->reset, 1);
-		dev_dbg(dev, "asserted RESET\n");
-		msleep(REALTEK_HW_STOP_DELAY);
-		gpiod_set_value(priv->reset, 0);
-		msleep(REALTEK_HW_START_DELAY);
-		dev_dbg(dev, "deasserted RESET\n");
-	}
+	priv = rtl83xx_probe(dev, &realtek_smi_info);
+	if (IS_ERR(priv))
+		return PTR_ERR(priv);
 
 	/* Fetch MDIO pins */
 	priv->mdc = devm_gpiod_get_optional(dev, "mdc", GPIOD_OUT_LOW);
-	if (IS_ERR(priv->mdc))
+	if (IS_ERR(priv->mdc)) {
+		rtl83xx_remove(priv);
 		return PTR_ERR(priv->mdc);
+	}
+
 	priv->mdio = devm_gpiod_get_optional(dev, "mdio", GPIOD_OUT_LOW);
-	if (IS_ERR(priv->mdio))
+	if (IS_ERR(priv->mdio)) {
+		rtl83xx_remove(priv);
 		return PTR_ERR(priv->mdio);
-
-	priv->leds_disabled = of_property_read_bool(np, "realtek,disable-leds");
-
-	ret = priv->ops->detect(priv);
-	if (ret) {
-		dev_err(dev, "unable to detect switch\n");
-		return ret;
 	}
 
-	priv->ds = devm_kzalloc(dev, sizeof(*priv->ds), GFP_KERNEL);
-	if (!priv->ds)
-		return -ENOMEM;
-
-	priv->ds->dev = dev;
-	priv->ds->num_ports = priv->num_ports;
-	priv->ds->priv = priv;
+	priv->write_reg_noack = realtek_smi_write_reg_noack;
 
-	priv->ds->ops = var->ds_ops_smi;
-	ret = dsa_register_switch(priv->ds);
+	ret = rtl83xx_register_switch(priv);
 	if (ret) {
-		dev_err_probe(dev, ret, "unable to register switch\n");
+		rtl83xx_remove(priv);
 		return ret;
 	}
+
 	return 0;
 }
+EXPORT_SYMBOL_NS_GPL(realtek_smi_probe, REALTEK_DSA);
 
-static void realtek_smi_remove(struct platform_device *pdev)
+/**
+ * realtek_smi_remove() - Remove the driver of a SMI-connected switch
+ * @pdev: platform_device to be removed.
+ *
+ * This function should be used as the .remove_new in a platform_driver. First
+ * it unregisters the DSA switch and then it calls the common remove function.
+ *
+ * Context: Can sleep.
+ * Return: Nothing.
+ */
+void realtek_smi_remove(struct platform_device *pdev)
 {
 	struct realtek_priv *priv = platform_get_drvdata(pdev);
 
 	if (!priv)
 		return;
 
-	dsa_unregister_switch(priv->ds);
-	if (priv->user_mii_bus)
-		of_node_put(priv->user_mii_bus->dev.of_node);
+	rtl83xx_unregister_switch(priv);
 
-	/* leave the device reset asserted */
-	if (priv->reset)
-		gpiod_set_value(priv->reset, 1);
+	rtl83xx_remove(priv);
 }
+EXPORT_SYMBOL_NS_GPL(realtek_smi_remove, REALTEK_DSA);
 
-static void realtek_smi_shutdown(struct platform_device *pdev)
+/**
+ * realtek_smi_shutdown() - Shutdown the driver of a SMI-connected switch
+ * @pdev: platform_device shutting down.
+ *
+ * This function should be used as the .shutdown in a platform_driver. It calls
+ * the common shutdown function.
+ *
+ * Context: Can sleep.
+ * Return: Nothing.
+ */
+void realtek_smi_shutdown(struct platform_device *pdev)
 {
 	struct realtek_priv *priv = platform_get_drvdata(pdev);
 
 	if (!priv)
 		return;
 
-	dsa_switch_shutdown(priv->ds);
-
-	platform_set_drvdata(pdev, NULL);
+	rtl83xx_shutdown(priv);
 }
-
-static const struct of_device_id realtek_smi_of_match[] = {
-#if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8366RB)
-	{
-		.compatible = "realtek,rtl8366rb",
-		.data = &rtl8366rb_variant,
-	},
-#endif
-#if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
-	{
-		.compatible = "realtek,rtl8365mb",
-		.data = &rtl8365mb_variant,
-	},
-#endif
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, realtek_smi_of_match);
-
-static struct platform_driver realtek_smi_driver = {
-	.driver = {
-		.name = "realtek-smi",
-		.of_match_table = realtek_smi_of_match,
-	},
-	.probe  = realtek_smi_probe,
-	.remove_new = realtek_smi_remove,
-	.shutdown = realtek_smi_shutdown,
-};
-module_platform_driver(realtek_smi_driver);
-
-MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
-MODULE_DESCRIPTION("Driver for Realtek ethernet switch connected via SMI interface");
-MODULE_LICENSE("GPL");
+EXPORT_SYMBOL_NS_GPL(realtek_smi_shutdown, REALTEK_DSA);