mediatek: add v5.4 support

Signed-off-by: Mark-MC Lee (李明昌) <Mark-MC.Lee@mediatek.com>

1 files changed, 598 insertions, 0 deletions

diff --git a/target/linux/mediatek/files-5.4/drivers/net/phy/mtk/mt753x/mt753x_mdio.c b/target/linux/mediatek/files-5.4/drivers/net/phy/mtk/mt753x/mt753x_mdio.c
new file mode 100644
index 0000000000..8a9a45c0be
--- /dev/null
+++ b/target/linux/mediatek/files-5.4/drivers/net/phy/mtk/mt753x/mt753x_mdio.c
@@ -0,0 +1,598 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/reset.h>
+#include <linux/hrtimer.h>
+#include <linux/mii.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+#include <linux/of_irq.h>
+#include <linux/phy.h>
+
+#include "mt753x.h"
+#include "mt753x_swconfig.h"
+#include "mt753x_regs.h"
+#include "mt753x_nl.h"
+#include "mt7530.h"
+#include "mt7531.h"
+
+static u32 mt753x_id;
+struct list_head mt753x_devs;
+static DEFINE_MUTEX(mt753x_devs_lock);
+
+static struct mt753x_sw_id *mt753x_sw_ids[] = {
+	&mt7530_id,
+	&mt7531_id,
+};
+
+u32 mt753x_reg_read(struct gsw_mt753x *gsw, u32 reg)
+{
+	u32 high, low;
+
+	mutex_lock(&gsw->host_bus->mdio_lock);
+
+	gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x1f,
+		(reg & MT753X_REG_PAGE_ADDR_M) >> MT753X_REG_PAGE_ADDR_S);
+
+	low = gsw->host_bus->read(gsw->host_bus, gsw->smi_addr,
+		(reg & MT753X_REG_ADDR_M) >> MT753X_REG_ADDR_S);
+
+	high = gsw->host_bus->read(gsw->host_bus, gsw->smi_addr, 0x10);
+
+	mutex_unlock(&gsw->host_bus->mdio_lock);
+
+	return (high << 16) | (low & 0xffff);
+}
+
+void mt753x_reg_write(struct gsw_mt753x *gsw, u32 reg, u32 val)
+{
+	mutex_lock(&gsw->host_bus->mdio_lock);
+
+	gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x1f,
+		(reg & MT753X_REG_PAGE_ADDR_M) >> MT753X_REG_PAGE_ADDR_S);
+
+	gsw->host_bus->write(gsw->host_bus, gsw->smi_addr,
+		(reg & MT753X_REG_ADDR_M) >> MT753X_REG_ADDR_S, val & 0xffff);
+
+	gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x10, val >> 16);
+
+	mutex_unlock(&gsw->host_bus->mdio_lock);
+}
+
+/* Indirect MDIO clause 22/45 access */
+static int mt753x_mii_rw(struct gsw_mt753x *gsw, int phy, int reg, u16 data,
+			 u32 cmd, u32 st)
+{
+	ktime_t timeout;
+	u32 val, timeout_us;
+	int ret = 0;
+
+	timeout_us = 100000;
+	timeout = ktime_add_us(ktime_get(), timeout_us);
+	while (1) {
+		val = mt753x_reg_read(gsw, PHY_IAC);
+
+		if ((val & PHY_ACS_ST) == 0)
+			break;
+
+		if (ktime_compare(ktime_get(), timeout) > 0)
+			return -ETIMEDOUT;
+	}
+
+	val = (st << MDIO_ST_S) |
+	      ((cmd << MDIO_CMD_S) & MDIO_CMD_M) |
+	      ((phy << MDIO_PHY_ADDR_S) & MDIO_PHY_ADDR_M) |
+	      ((reg << MDIO_REG_ADDR_S) & MDIO_REG_ADDR_M);
+
+	if (cmd == MDIO_CMD_WRITE || cmd == MDIO_CMD_ADDR)
+		val |= data & MDIO_RW_DATA_M;
+
+	mt753x_reg_write(gsw, PHY_IAC, val | PHY_ACS_ST);
+
+	timeout_us = 100000;
+	timeout = ktime_add_us(ktime_get(), timeout_us);
+	while (1) {
+		val = mt753x_reg_read(gsw, PHY_IAC);
+
+		if ((val & PHY_ACS_ST) == 0)
+			break;
+
+		if (ktime_compare(ktime_get(), timeout) > 0)
+			return -ETIMEDOUT;
+	}
+
+	if (cmd == MDIO_CMD_READ || cmd == MDIO_CMD_READ_C45) {
+		val = mt753x_reg_read(gsw, PHY_IAC);
+		ret = val & MDIO_RW_DATA_M;
+	}
+
+	return ret;
+}
+
+int mt753x_mii_read(struct gsw_mt753x *gsw, int phy, int reg)
+{
+	int val;
+
+	if (phy < MT753X_NUM_PHYS)
+		phy = (gsw->phy_base + phy) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+	val = mt753x_mii_rw(gsw, phy, reg, 0, MDIO_CMD_READ, MDIO_ST_C22);
+	mutex_unlock(&gsw->mii_lock);
+
+	return val;
+}
+
+void mt753x_mii_write(struct gsw_mt753x *gsw, int phy, int reg, u16 val)
+{
+	if (phy < MT753X_NUM_PHYS)
+		phy = (gsw->phy_base + phy) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+	mt753x_mii_rw(gsw, phy, reg, val, MDIO_CMD_WRITE, MDIO_ST_C22);
+	mutex_unlock(&gsw->mii_lock);
+}
+
+int mt753x_mmd_read(struct gsw_mt753x *gsw, int addr, int devad, u16 reg)
+{
+	int val;
+
+	if (addr < MT753X_NUM_PHYS)
+		addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+	mt753x_mii_rw(gsw, addr, devad, reg, MDIO_CMD_ADDR, MDIO_ST_C45);
+	val = mt753x_mii_rw(gsw, addr, devad, 0, MDIO_CMD_READ_C45,
+			    MDIO_ST_C45);
+	mutex_unlock(&gsw->mii_lock);
+
+	return val;
+}
+
+void mt753x_mmd_write(struct gsw_mt753x *gsw, int addr, int devad, u16 reg,
+		      u16 val)
+{
+	if (addr < MT753X_NUM_PHYS)
+		addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+	mt753x_mii_rw(gsw, addr, devad, reg, MDIO_CMD_ADDR, MDIO_ST_C45);
+	mt753x_mii_rw(gsw, addr, devad, val, MDIO_CMD_WRITE, MDIO_ST_C45);
+	mutex_unlock(&gsw->mii_lock);
+}
+
+int mt753x_mmd_ind_read(struct gsw_mt753x *gsw, int addr, int devad, u16 reg)
+{
+	u16 val;
+
+	if (addr < MT753X_NUM_PHYS)
+		addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG,
+		      (MMD_ADDR << MMD_CMD_S) |
+		      ((devad << MMD_DEVAD_S) & MMD_DEVAD_M),
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, reg,
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG,
+		      (MMD_DATA << MMD_CMD_S) |
+		      ((devad << MMD_DEVAD_S) & MMD_DEVAD_M),
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	val = mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, 0,
+			    MDIO_CMD_READ, MDIO_ST_C22);
+
+	mutex_unlock(&gsw->mii_lock);
+
+	return val;
+}
+
+void mt753x_mmd_ind_write(struct gsw_mt753x *gsw, int addr, int devad, u16 reg,
+			  u16 val)
+{
+	if (addr < MT753X_NUM_PHYS)
+		addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK;
+
+	mutex_lock(&gsw->mii_lock);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG,
+		      (MMD_ADDR << MMD_CMD_S) |
+		      ((devad << MMD_DEVAD_S) & MMD_DEVAD_M),
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, reg,
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG,
+		      (MMD_DATA << MMD_CMD_S) |
+		      ((devad << MMD_DEVAD_S) & MMD_DEVAD_M),
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, val,
+		      MDIO_CMD_WRITE, MDIO_ST_C22);
+
+	mutex_unlock(&gsw->mii_lock);
+}
+
+static inline int mt753x_get_duplex(const struct device_node *np)
+{
+	return of_property_read_bool(np, "full-duplex");
+}
+
+static void mt753x_load_port_cfg(struct gsw_mt753x *gsw)
+{
+	struct device_node *port_np;
+	struct device_node *fixed_link_node;
+	struct mt753x_port_cfg *port_cfg;
+	u32 port;
+
+	for_each_child_of_node(gsw->dev->of_node, port_np) {
+		if (!of_device_is_compatible(port_np, "mediatek,mt753x-port"))
+			continue;
+
+		if (!of_device_is_available(port_np))
+			continue;
+
+		if (of_property_read_u32(port_np, "reg", &port))
+			continue;
+
+		switch (port) {
+		case 5:
+			port_cfg = &gsw->port5_cfg;
+			break;
+		case 6:
+			port_cfg = &gsw->port6_cfg;
+			break;
+		default:
+			continue;
+		}
+
+		if (port_cfg->enabled) {
+			dev_info(gsw->dev, "duplicated node for port%d\n",
+				 port_cfg->phy_mode);
+			continue;
+		}
+
+		port_cfg->np = port_np;
+
+		port_cfg->phy_mode = of_get_phy_mode(port_np);
+		if (port_cfg->phy_mode < 0) {
+			dev_info(gsw->dev, "incorrect phy-mode %d\n", port);
+			continue;
+		}
+
+		fixed_link_node = of_get_child_by_name(port_np, "fixed-link");
+		if (fixed_link_node) {
+			u32 speed;
+
+			port_cfg->force_link = 1;
+			port_cfg->duplex = mt753x_get_duplex(fixed_link_node);
+
+			if (of_property_read_u32(fixed_link_node, "speed",
+						 &speed)) {
+				speed = 0;
+				continue;
+			}
+
+			of_node_put(fixed_link_node);
+
+			switch (speed) {
+			case 10:
+				port_cfg->speed = MAC_SPD_10;
+				break;
+			case 100:
+				port_cfg->speed = MAC_SPD_100;
+				break;
+			case 1000:
+				port_cfg->speed = MAC_SPD_1000;
+				break;
+			case 2500:
+				port_cfg->speed = MAC_SPD_2500;
+				break;
+			default:
+				dev_info(gsw->dev, "incorrect speed %d\n",
+					 speed);
+				continue;
+			}
+		}
+
+		port_cfg->enabled = 1;
+	}
+}
+
+static void mt753x_add_gsw(struct gsw_mt753x *gsw)
+{
+	mutex_lock(&mt753x_devs_lock);
+	gsw->id = mt753x_id++;
+	INIT_LIST_HEAD(&gsw->list);
+	list_add_tail(&gsw->list, &mt753x_devs);
+	mutex_unlock(&mt753x_devs_lock);
+}
+
+static void mt753x_remove_gsw(struct gsw_mt753x *gsw)
+{
+	mutex_lock(&mt753x_devs_lock);
+	list_del(&gsw->list);
+	mutex_unlock(&mt753x_devs_lock);
+}
+
+
+struct gsw_mt753x *mt753x_get_gsw(u32 id)
+{
+	struct gsw_mt753x *dev;
+
+	mutex_lock(&mt753x_devs_lock);
+
+	list_for_each_entry(dev, &mt753x_devs, list) {
+		if (dev->id == id)
+			return dev;
+	}
+
+	mutex_unlock(&mt753x_devs_lock);
+
+	return NULL;
+}
+
+struct gsw_mt753x *mt753x_get_first_gsw(void)
+{
+	struct gsw_mt753x *dev;
+
+	mutex_lock(&mt753x_devs_lock);
+
+	list_for_each_entry(dev, &mt753x_devs, list)
+		return dev;
+
+	mutex_unlock(&mt753x_devs_lock);
+
+	return NULL;
+}
+
+void mt753x_put_gsw(void)
+{
+	mutex_unlock(&mt753x_devs_lock);
+}
+
+void mt753x_lock_gsw(void)
+{
+	mutex_lock(&mt753x_devs_lock);
+}
+
+static int mt753x_hw_reset(struct gsw_mt753x *gsw)
+{
+	struct device_node *np = gsw->dev->of_node;
+	struct reset_control *rstc;
+	int mcm;
+	int ret = -EINVAL;
+
+	mcm = of_property_read_bool(np, "mediatek,mcm");
+	if (mcm) {
+		rstc = devm_reset_control_get(gsw->dev, "mcm");
+		ret = IS_ERR(rstc);
+		if (IS_ERR(rstc)) {
+			dev_err(gsw->dev, "Missing reset ctrl of switch\n");
+			return ret;
+		}
+
+		reset_control_assert(rstc);
+		msleep(30);
+		reset_control_deassert(rstc);
+
+		gsw->reset_pin = -1;
+		return 0;
+	}
+
+	gsw->reset_pin = of_get_named_gpio(np, "reset-gpios", 0);
+	if (gsw->reset_pin < 0) {
+		dev_err(gsw->dev, "Missing reset pin of switch\n");
+		return ret;
+	}
+
+	ret = devm_gpio_request(gsw->dev, gsw->reset_pin, "mt753x-reset");
+	if (ret) {
+		dev_info(gsw->dev, "Failed to request gpio %d\n",
+			 gsw->reset_pin);
+		return ret;
+	}
+
+	gpio_direction_output(gsw->reset_pin, 0);
+	msleep(30);
+	gpio_set_value(gsw->reset_pin, 1);
+	msleep(500);
+
+	return 0;
+}
+
+static irqreturn_t mt753x_irq_handler(int irq, void *dev)
+{
+	struct gsw_mt753x *gsw = dev;
+
+	disable_irq_nosync(gsw->irq);
+
+	schedule_work(&gsw->irq_worker);
+
+	return IRQ_HANDLED;
+}
+
+static int mt753x_probe(struct platform_device *pdev)
+{
+	struct gsw_mt753x *gsw;
+	struct mt753x_sw_id *sw;
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *mdio;
+	struct mii_bus *mdio_bus;
+	int ret = -EINVAL;
+	struct chip_rev rev;
+	struct mt753x_mapping *map;
+	int i;
+
+	mdio = of_parse_phandle(np, "mediatek,mdio", 0);
+	if (!mdio)
+		return -EINVAL;
+
+	mdio_bus = of_mdio_find_bus(mdio);
+	if (!mdio_bus)
+		return -EPROBE_DEFER;
+
+	gsw = devm_kzalloc(&pdev->dev, sizeof(struct gsw_mt753x), GFP_KERNEL);
+	if (!gsw)
+		return -ENOMEM;
+
+	gsw->host_bus = mdio_bus;
+	gsw->dev = &pdev->dev;
+	mutex_init(&gsw->mii_lock);
+
+	/* Switch hard reset */
+	if (mt753x_hw_reset(gsw))
+		goto fail;
+
+	/* Fetch the SMI address dirst */
+	if (of_property_read_u32(np, "mediatek,smi-addr", &gsw->smi_addr))
+		gsw->smi_addr = MT753X_DFL_SMI_ADDR;
+
+	/* Get LAN/WAN port mapping */
+	map = mt753x_find_mapping(np);
+	if (map) {
+		mt753x_apply_mapping(gsw, map);
+		gsw->global_vlan_enable = 1;
+		dev_info(gsw->dev, "LAN/WAN VLAN setting=%s\n", map->name);
+	}
+
+	/* Load MAC port configurations */
+	mt753x_load_port_cfg(gsw);
+
+	/* Check for valid switch and then initialize */
+	for (i = 0; i < ARRAY_SIZE(mt753x_sw_ids); i++) {
+		if (!mt753x_sw_ids[i]->detect(gsw, &rev)) {
+			sw = mt753x_sw_ids[i];
+
+			gsw->name = rev.name;
+			gsw->model = sw->model;
+
+			dev_info(gsw->dev, "Switch is MediaTek %s rev %d",
+				 gsw->name, rev.rev);
+
+			/* Initialize the switch */
+			ret = sw->init(gsw);
+			if (ret)
+				goto fail;
+
+			break;
+		}
+	}
+
+	if (i >= ARRAY_SIZE(mt753x_sw_ids)) {
+		dev_err(gsw->dev, "No mt753x switch found\n");
+		goto fail;
+	}
+
+	gsw->irq = platform_get_irq(pdev, 0);
+	if (gsw->irq >= 0) {
+		ret = devm_request_irq(gsw->dev, gsw->irq, mt753x_irq_handler,
+				       0, dev_name(gsw->dev), gsw);
+		if (ret) {
+			dev_err(gsw->dev, "Failed to request irq %d\n",
+				gsw->irq);
+			goto fail;
+		}
+
+		INIT_WORK(&gsw->irq_worker, mt753x_irq_worker);
+	}
+
+	platform_set_drvdata(pdev, gsw);
+
+	gsw->phy_status_poll = of_property_read_bool(gsw->dev->of_node,
+						     "mediatek,phy-poll");
+
+	mt753x_add_gsw(gsw);
+
+	mt753x_swconfig_init(gsw);
+
+	if (sw->post_init)
+		sw->post_init(gsw);
+
+	if (gsw->irq >= 0)
+		mt753x_irq_enable(gsw);
+
+	return 0;
+
+fail:
+	devm_kfree(&pdev->dev, gsw);
+
+	return ret;
+}
+
+static int mt753x_remove(struct platform_device *pdev)
+{
+	struct gsw_mt753x *gsw = platform_get_drvdata(pdev);
+
+	if (gsw->irq >= 0)
+		cancel_work_sync(&gsw->irq_worker);
+
+	if (gsw->reset_pin >= 0)
+		devm_gpio_free(&pdev->dev, gsw->reset_pin);
+
+#ifdef CONFIG_SWCONFIG
+	mt753x_swconfig_destroy(gsw);
+#endif
+
+	mt753x_remove_gsw(gsw);
+
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static const struct of_device_id mt753x_ids[] = {
+	{ .compatible = "mediatek,mt753x" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, mt753x_ids);
+
+static struct platform_driver mt753x_driver = {
+	.probe = mt753x_probe,
+	.remove = mt753x_remove,
+	.driver = {
+		.name = "mt753x",
+		.of_match_table = mt753x_ids,
+	},
+};
+
+static int __init mt753x_init(void)
+{
+	int ret;
+
+	INIT_LIST_HEAD(&mt753x_devs);
+	ret = platform_driver_register(&mt753x_driver);
+
+	mt753x_nl_init();
+
+	return ret;
+}
+module_init(mt753x_init);
+
+static void __exit mt753x_exit(void)
+{
+	mt753x_nl_exit();
+
+	platform_driver_unregister(&mt753x_driver);
+}
+module_exit(mt753x_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Weijie Gao <weijie.gao@mediatek.com>");
+MODULE_DESCRIPTION("Driver for MediaTek MT753x Gigabit Switch");