drivers/net/ethernet/stmicro/stmmac/dwmac-meson.c - manifest_repos/kernel - Git at Google

 /*
  * Amlogic Meson6 and Meson8 DWMAC glue layer
  *
  * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */

 #include <linux/device.h>
 #include <linux/ethtool.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/stmmac.h>
 #include "stmmac_platform.h"

 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 #include <linux/bitops.h>
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
 #include "dwmac1000.h"
 #include "dwmac_dma.h"
 #include <linux/amlogic/pwr_ctrl.h>
 #endif

 #define ETHMAC_SPEED_100	BIT(1)

 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 /*if not g12a use genphy driver*/
 /* if it's internal phy we will shutdown analog*/
 static unsigned int is_internal_phy;
 /* Ethernet register for G12A PHY */
 #define ETH_PLL_CTL0 0x44
 #define ETH_PLL_CTL1 0x48
 #define ETH_PLL_CTL2 0x4C
 #define ETH_PLL_CTL3 0x50
 #define ETH_PLL_CTL4 0x54
 #define ETH_PLL_CTL5 0x58
 #define ETH_PLL_CTL6 0x5C
 #define ETH_PLL_CTL7 0x60

 #define ETH_PHY_CNTL0 0x80
 #define ETH_PHY_CNTL1 0x84
 #define ETH_PHY_CNTL2 0x88

 #define	ETH_USE_EPHY BIT(5)
 #define	ETH_EPHY_FROM_MAC BIT(6)
 /*TODO wol function for exphy*/
 unsigned int support_internal_phy_wol;
 unsigned int support_external_phy_wol;
 static unsigned int support_mac_wol;
 static unsigned int eth_power;
 #endif
 struct meson_dwmac {
 	struct device	*dev;
 	void __iomem	*reg;
 };

 static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
 {
 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 #else
 	struct meson_dwmac *dwmac = priv;
 	unsigned int val;

 	val = readl(dwmac->reg);

 	switch (speed) {
 	case SPEED_10:
 		val &= ~ETHMAC_SPEED_100;
 		break;
 	case SPEED_100:
 		val |= ETHMAC_SPEED_100;
 		break;
 	}

 	writel(val, dwmac->reg);
 #endif
 }

 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 static int dwmac_meson_cfg_ctrl(void __iomem *base_addr)
 {
 	void __iomem *ETH_PHY_config_addr = base_addr;

 	/*config phyid should between  a 0~0xffffffff*/
 	/*please don't use 44000181, this has been used by internal phy*/
 	writel(0x33010180, ETH_PHY_config_addr + ETH_PHY_CNTL0);

 	/*use_phy_smi | use_phy_ip | co_clkin from eth_phy_top*/
 	writel(0x260, ETH_PHY_config_addr + ETH_PHY_CNTL2);
 	/*led signal is inverted*/
 	writel(0x41054147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
 	writel(0x41014147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
 	writel(0x41054147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
 	/*wait phy to reset cause Power Up Reset need 5.2~2.6 ms*/
 	mdelay(10);
 	return 0;
 }

 static int dwmac_meson_cfg_pll(void __iomem *base_addr,
 			       struct platform_device *pdev)
 {
 	void __iomem *ETH_PHY_config_addr = base_addr;
 	u32 pll_val[3] = {0};

 	of_property_read_u32_array(pdev->dev.of_node, "pll_val",
 				   pll_val, sizeof(pll_val) / sizeof(u32));
 	//printk("wzh pll %x %x %x", pll_val[0], pll_val[1], pll_val[2]);

 	writel(pll_val[0] | 0x30000000, ETH_PHY_config_addr + ETH_PLL_CTL0);
 	writel(pll_val[1], ETH_PHY_config_addr + ETH_PLL_CTL1);
 	writel(pll_val[2], ETH_PHY_config_addr + ETH_PLL_CTL2);
 	writel(0x00000000, ETH_PHY_config_addr + ETH_PLL_CTL3);
 	usleep_range(100, 200);
 	writel(pll_val[0] | 0x10000000, ETH_PHY_config_addr + ETH_PLL_CTL0);
 	return 0;
 }

 static int dwmac_meson_cfg_analog(void __iomem *base_addr,
 				  struct platform_device *pdev)
 {
 	void __iomem *ETH_PHY_config_addr = base_addr;
 	u32 analog_val[3] = {0};

 	of_property_read_u32_array
 				   (pdev->dev.of_node, "analog_val",
 				   analog_val,
 				   sizeof(analog_val) / sizeof(u32));
 	//printk("wzh analog %x %x %x", analog_val[0],
 		//analog_val[1], analog_val[2]);
 	/*Analog*/
 	writel(analog_val[0], ETH_PHY_config_addr + ETH_PLL_CTL5);
 	writel(analog_val[1], ETH_PHY_config_addr + ETH_PLL_CTL6);
 	writel(analog_val[2], ETH_PHY_config_addr + ETH_PLL_CTL7);

 	return 0;
 }

 unsigned int  tx_amp_bl2;
 /*for newer then g12a use this dts architecture for dts*/
 static void __iomem *g12a_network_interface_setup(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
 	struct pinctrl *pin_ctl;
 	struct resource *res = NULL;
 	u32 mc_val;
 	void __iomem *addr = NULL;
 	void __iomem *REG_ETH_reg0_addr = NULL;
 	void __iomem *ETH_PHY_config_addr = NULL;
 	void __iomem *tx_amp_src = NULL;
 	u32 internal_phy = 0;

 	is_internal_phy = 0;

 	/*map PRG_ETH_REG */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eth_cfg");
 	if (!res) {
 		dev_err(&pdev->dev, "Unable to get resource(%d)\n", __LINE__);
 		return NULL;
 	}

 	addr = devm_ioremap_resource(dev, res);
 	if (IS_ERR(addr)) {
 		dev_err(&pdev->dev, "Unable to map base (%d)\n", __LINE__);
 		return NULL;
 	}

 	REG_ETH_reg0_addr = addr;

 	/*map ETH_PLL address*/
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eth_pll");
 	if (!res) {
 		dev_err(&pdev->dev, "Unable to get resource(%d)\n", __LINE__);
 		return NULL;
 	}

 	addr = devm_ioremap_resource(dev, res);
 	if (IS_ERR(addr)) {
 		dev_err(&pdev->dev, "Unable to map clk base (%d)\n", __LINE__);
 		return NULL;
 	}

 	ETH_PHY_config_addr = addr;

 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tx_amp_src");
 	if (!res) {
 		pr_info("tx_amp_src not setup\n");
 	} else {
 		tx_amp_src = devm_ioremap_resource(dev, res);
 		if (IS_ERR(addr)) {
 			dev_err(&pdev->dev,
 				"cat't map tx_amp (%d)\n", __LINE__);
 			return NULL;
 		}
 		tx_amp_bl2 = readl(tx_amp_src);
 		pr_info("wzh tx_Amp 0x%x\n", tx_amp_bl2);
 	}

 	/*PRG_ETH_REG0*/
 	if (of_property_read_u32(np, "mc_val", &mc_val))
 		pr_info("Miss mc_val for REG0\n");
 	else
 		writel(mc_val, REG_ETH_reg0_addr);

 	/*read phy option*/
 	if (of_property_read_u32(np, "internal_phy", &internal_phy) != 0) {
 		pr_info("Dts miss internal_phy item\n");
 		return REG_ETH_reg0_addr;
 	}

 	is_internal_phy = internal_phy;
 	/* Config G12A internal PHY */
 	if (internal_phy) {
 		/*mac wol*/
 		if (of_property_read_u32(np, "mac_wol",
 					 &support_mac_wol))
 			pr_info("MAC wol not set\n");
 		else
 			pr_info("MAC wol :got wol %d .set it\n",
 				support_mac_wol);
 		/*PLL*/
 		dwmac_meson_cfg_pll(ETH_PHY_config_addr, pdev);
 		dwmac_meson_cfg_analog(ETH_PHY_config_addr, pdev);
 		dwmac_meson_cfg_ctrl(ETH_PHY_config_addr);

 		pin_ctl = devm_pinctrl_get_select
 			(&pdev->dev, "internal_eth_pins");
 		return REG_ETH_reg0_addr;
 	}

 	/*config extern phy*/
 	if (internal_phy == 0) {
 		/* only exphy support wol since g12a*/
 		/*we enable/disable wol with item in dts with "wol=<1>"*/
 		if (of_property_read_u32(np, "wol",
 					 &support_external_phy_wol))
 			pr_debug("exphy wol not set\n");
 		else
 			pr_debug("exphy Ethernet :got wol %d .set it\n",
 				 support_external_phy_wol);

 		/*switch to extern phy*/
 		writel(0x0, ETH_PHY_config_addr + ETH_PHY_CNTL2);
 		pin_ctl = devm_pinctrl_get_select
 			(&pdev->dev, "external_eth_pins");
 		return REG_ETH_reg0_addr;
 	}

 	pr_info("should not happen\n");
 	return REG_ETH_reg0_addr;
 }

 void __iomem *phy_analog_config_addr;
 static int dwmac_meson_disable_analog(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	void __iomem *phy_analog_config_addr = NULL;

 	/*map ETH_PLL address*/
 	phy_analog_config_addr = devm_ioremap_nocache
 					(&pdev->dev,
 					(resource_size_t)0xff64c000, 4);
 	if (eth_power) {
 		/*todo*/
 	} else {
 		writel(0x00000000, phy_analog_config_addr + 0x0);
 		writel(0x003e0000, phy_analog_config_addr + 0x4);
 		writel(0x12844008, phy_analog_config_addr + 0x8);
 		writel(0x0800a40c, phy_analog_config_addr + 0xc);
 		writel(0x00000000, phy_analog_config_addr + 0x10);
 		writel(0x031d161c, phy_analog_config_addr + 0x14);
 		writel(0x00001683, phy_analog_config_addr + 0x18);
 		writel(0x09c0040a, phy_analog_config_addr + 0x44);
 	}
 	return 0;
 }

 static int dwmac_meson_recover_analog(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	void __iomem *phy_analog_config_addr = NULL;

 	/*map ETH_PLL address*/
 	phy_analog_config_addr = devm_ioremap_nocache
 					(&pdev->dev,
 					(resource_size_t)0xff64c000, 4);
 	pr_info("recover %p\n", phy_analog_config_addr);

 	writel(0x19c0040a, phy_analog_config_addr + 0x44);
 	writel(0x0, phy_analog_config_addr + 0x4);
 	return 0;
 }

 static int meson6_dwmac_suspend(struct device *dev)
 {
 	int ret;
 	/*shudown internal phy analog*/
 	struct pinctrl *pin_ctrl;
 	struct pinctrl_state *turnoff_tes = NULL;

 	/*shudown internal phy analog*/
 	pr_info("suspend inter = %d\n", is_internal_phy);
 	if ((is_internal_phy) && support_mac_wol == 0) {
 		/*turn off led*/
 		pin_ctrl = devm_pinctrl_get(dev);
 		if (IS_ERR_OR_NULL(pin_ctrl)) {
 		/*led will not work*/
 			pr_info("pinctrl is null\n");
 		} else {
 			turnoff_tes = pinctrl_lookup_state
 					(pin_ctrl, "internal_gpio_pins");
 			if (IS_ERR_OR_NULL(turnoff_tes))
 				pr_info("Not support gpio low\n");
 			else
 				pinctrl_select_state(pin_ctrl, turnoff_tes);

 			devm_pinctrl_put(pin_ctrl);
 			pin_ctrl = NULL;
 		}
 		dwmac_meson_disable_analog(dev);
 	}
 	ret = stmmac_pltfr_suspend(dev);

 	return ret;
 }

 static int meson6_dwmac_resume(struct device *dev)
 {
 	int ret;
 	struct pinctrl *pin_ctrl;
 	struct pinctrl_state *turnon_tes = NULL;

 	pr_info("resuem inter = %d\n", is_internal_phy);
 	if ((is_internal_phy) && support_mac_wol == 0) {
 		pin_ctrl = devm_pinctrl_get(dev);
 		if (IS_ERR_OR_NULL(pin_ctrl)) {
 			pr_info("pinctrl is null\n");
 		} else {
 			turnon_tes = pinctrl_lookup_state
 					(pin_ctrl, "internal_eth_pins");
 			pinctrl_select_state(pin_ctrl, turnon_tes);
 			devm_pinctrl_put(pin_ctrl);
 			pin_ctrl = NULL;
 		}
 		dwmac_meson_recover_analog(dev);
 	}
 	ret = stmmac_pltfr_resume(dev);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(meson6_dwmac_resume);

 void meson6_dwmac_shutdown(struct platform_device *pdev)
 {
 	struct pinctrl *pin_ctrl;
 	struct pinctrl_state *turnoff_tes = NULL;
 	/*shudown internal phy analog*/
 	if (is_internal_phy) {
 		pin_ctrl = devm_pinctrl_get(&pdev->dev);
 		if (IS_ERR_OR_NULL(pin_ctrl)) {
 			pr_info("pinctrl is null\n");
 		} else {
 			turnoff_tes = pinctrl_lookup_state
 					(pin_ctrl, "internal_gpio_pins");
 			if (IS_ERR_OR_NULL(turnoff_tes))
 				pr_info("Not support gpio low\n");
 			else
 				pinctrl_select_state(pin_ctrl, turnoff_tes);

 			//pinctrl_select_state(pin_ctrl, turnoff_tes);
 			devm_pinctrl_put(pin_ctrl);
 			pin_ctrl = NULL;
 		}
 		dwmac_meson_disable_analog(&pdev->dev);
 	}
 	stmmac_pltfr_suspend(&pdev->dev);
 }

 #endif

 static int meson6_dwmac_probe(struct platform_device *pdev)
 {
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
 	struct meson_dwmac *dwmac;
 	int ret;

 	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
 	if (ret)
 		return ret;

 	plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
 	if (IS_ERR(plat_dat))
 		return PTR_ERR(plat_dat);

 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
 	if (!dwmac) {
 		ret = -ENOMEM;
 		goto err_remove_config_dt;
 	}

 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 	dwmac->reg = g12a_network_interface_setup(pdev);
 	/* Custom initialisation (if needed) */
 	if (plat_dat->init) {
 		ret = plat_dat->init(pdev, plat_dat->bsp_priv);
 		if (ret)
 			return ret;
 	}
 #else
 	struct resource *res;
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(dwmac->reg)) {
 		ret = PTR_ERR(dwmac->reg);
 		goto err_remove_config_dt;
 	}

 #endif
 	plat_dat->bsp_priv = dwmac;
 	plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;

 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
 	if (ret)
 		goto err_remove_config_dt;

 	return 0;

 err_remove_config_dt:
 	stmmac_remove_config_dt(pdev, plat_dat);

 	return ret;
 }

 static const struct of_device_id meson6_dwmac_match[] = {
 	{ .compatible = "amlogic,meson6-dwmac" },
 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 	{ .compatible = "amlogic, g12a-eth-dwmac" },
 #endif
 	{ }
 };
 MODULE_DEVICE_TABLE(of, meson6_dwmac_match);

 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, meson6_dwmac_suspend,
 		  meson6_dwmac_resume);
 #endif
 static struct platform_driver meson6_dwmac_driver = {
 	.probe  = meson6_dwmac_probe,
 	.remove = stmmac_pltfr_remove,
 #ifdef CONFIG_AMLOGIC_ETH_PRIVE
 	.shutdown = meson6_dwmac_shutdown,
 #endif
 	.driver = {
 		.name           = "meson6-dwmac",
 		.pm		= &stmmac_pltfr_pm_ops,
 		.of_match_table = meson6_dwmac_match,
 	},
 };
 module_platform_driver(meson6_dwmac_driver);

 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
 MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
 MODULE_LICENSE("GPL v2");
	/*
	* Amlogic Meson6 and Meson8 DWMAC glue layer
	*
	* Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include <linux/device.h>
	#include <linux/ethtool.h>
	#include <linux/io.h>
	#include <linux/ioport.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/stmmac.h>
	#include "stmmac_platform.h"

	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	#include <linux/bitops.h>
	#include <linux/of_device.h>
	#include <linux/pinctrl/consumer.h>
	#include "dwmac1000.h"
	#include "dwmac_dma.h"
	#include <linux/amlogic/pwr_ctrl.h>
	#endif

	#define ETHMAC_SPEED_100 BIT(1)

	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	/if not g12a use genphy driver/
	/* if it's internal phy we will shutdown analog*/
	static unsigned int is_internal_phy;
	/* Ethernet register for G12A PHY */
	#define ETH_PLL_CTL0 0x44
	#define ETH_PLL_CTL1 0x48
	#define ETH_PLL_CTL2 0x4C
	#define ETH_PLL_CTL3 0x50
	#define ETH_PLL_CTL4 0x54
	#define ETH_PLL_CTL5 0x58
	#define ETH_PLL_CTL6 0x5C
	#define ETH_PLL_CTL7 0x60

	#define ETH_PHY_CNTL0 0x80
	#define ETH_PHY_CNTL1 0x84
	#define ETH_PHY_CNTL2 0x88

	#define ETH_USE_EPHY BIT(5)
	#define ETH_EPHY_FROM_MAC BIT(6)
	/TODO wol function for exphy/
	unsigned int support_internal_phy_wol;
	unsigned int support_external_phy_wol;
	static unsigned int support_mac_wol;
	static unsigned int eth_power;
	#endif
	struct meson_dwmac {
	struct device *dev;
	void __iomem *reg;
	};

	static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
	{
	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	#else
	struct meson_dwmac *dwmac = priv;
	unsigned int val;

	val = readl(dwmac->reg);

	switch (speed) {
	case SPEED_10:
	val &= ~ETHMAC_SPEED_100;
	break;
	case SPEED_100:
	val \|= ETHMAC_SPEED_100;
	break;
	}

	writel(val, dwmac->reg);
	#endif
	}

	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	static int dwmac_meson_cfg_ctrl(void __iomem *base_addr)
	{
	void __iomem *ETH_PHY_config_addr = base_addr;

	/config phyid should between a 0~0xffffffff/
	/please don't use 44000181, this has been used by internal phy/
	writel(0x33010180, ETH_PHY_config_addr + ETH_PHY_CNTL0);

	/use_phy_smi \| use_phy_ip \| co_clkin from eth_phy_top/
	writel(0x260, ETH_PHY_config_addr + ETH_PHY_CNTL2);
	/led signal is inverted/
	writel(0x41054147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
	writel(0x41014147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
	writel(0x41054147, ETH_PHY_config_addr + ETH_PHY_CNTL1);
	/wait phy to reset cause Power Up Reset need 5.2~2.6 ms/
	mdelay(10);
	return 0;
	}

	static int dwmac_meson_cfg_pll(void __iomem *base_addr,
	struct platform_device *pdev)
	{
	void __iomem *ETH_PHY_config_addr = base_addr;
	u32 pll_val[3] = {0};

	of_property_read_u32_array(pdev->dev.of_node, "pll_val",
	pll_val, sizeof(pll_val) / sizeof(u32));
	//printk("wzh pll %x %x %x", pll_val[0], pll_val[1], pll_val[2]);

	writel(pll_val[0] \| 0x30000000, ETH_PHY_config_addr + ETH_PLL_CTL0);
	writel(pll_val[1], ETH_PHY_config_addr + ETH_PLL_CTL1);
	writel(pll_val[2], ETH_PHY_config_addr + ETH_PLL_CTL2);
	writel(0x00000000, ETH_PHY_config_addr + ETH_PLL_CTL3);
	usleep_range(100, 200);
	writel(pll_val[0] \| 0x10000000, ETH_PHY_config_addr + ETH_PLL_CTL0);
	return 0;
	}

	static int dwmac_meson_cfg_analog(void __iomem *base_addr,
	struct platform_device *pdev)
	{
	void __iomem *ETH_PHY_config_addr = base_addr;
	u32 analog_val[3] = {0};

	of_property_read_u32_array
	(pdev->dev.of_node, "analog_val",
	analog_val,
	sizeof(analog_val) / sizeof(u32));
	//printk("wzh analog %x %x %x", analog_val[0],
	//analog_val[1], analog_val[2]);
	/Analog/
	writel(analog_val[0], ETH_PHY_config_addr + ETH_PLL_CTL5);
	writel(analog_val[1], ETH_PHY_config_addr + ETH_PLL_CTL6);
	writel(analog_val[2], ETH_PHY_config_addr + ETH_PLL_CTL7);

	return 0;
	}

	unsigned int tx_amp_bl2;
	/for newer then g12a use this dts architecture for dts/
	static void __iomem g12a_network_interface_setup(struct platform_device pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	struct pinctrl *pin_ctl;
	struct resource *res = NULL;
	u32 mc_val;
	void __iomem *addr = NULL;
	void __iomem *REG_ETH_reg0_addr = NULL;
	void __iomem *ETH_PHY_config_addr = NULL;
	void __iomem *tx_amp_src = NULL;
	u32 internal_phy = 0;

	is_internal_phy = 0;

	/map PRG_ETH_REG /
	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eth_cfg");
	if (!res) {
	dev_err(&pdev->dev, "Unable to get resource(%d)\n", __LINE__);
	return NULL;
	}

	addr = devm_ioremap_resource(dev, res);
	if (IS_ERR(addr)) {
	dev_err(&pdev->dev, "Unable to map base (%d)\n", __LINE__);
	return NULL;
	}

	REG_ETH_reg0_addr = addr;

	/map ETH_PLL address/
	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eth_pll");
	if (!res) {
	dev_err(&pdev->dev, "Unable to get resource(%d)\n", __LINE__);
	return NULL;
	}

	addr = devm_ioremap_resource(dev, res);
	if (IS_ERR(addr)) {
	dev_err(&pdev->dev, "Unable to map clk base (%d)\n", __LINE__);
	return NULL;
	}

	ETH_PHY_config_addr = addr;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tx_amp_src");
	if (!res) {
	pr_info("tx_amp_src not setup\n");
	} else {
	tx_amp_src = devm_ioremap_resource(dev, res);
	if (IS_ERR(addr)) {
	dev_err(&pdev->dev,
	"cat't map tx_amp (%d)\n", __LINE__);
	return NULL;
	}
	tx_amp_bl2 = readl(tx_amp_src);
	pr_info("wzh tx_Amp 0x%x\n", tx_amp_bl2);
	}

	/PRG_ETH_REG0/
	if (of_property_read_u32(np, "mc_val", &mc_val))
	pr_info("Miss mc_val for REG0\n");
	else
	writel(mc_val, REG_ETH_reg0_addr);

	/read phy option/
	if (of_property_read_u32(np, "internal_phy", &internal_phy) != 0) {
	pr_info("Dts miss internal_phy item\n");
	return REG_ETH_reg0_addr;
	}

	is_internal_phy = internal_phy;
	/* Config G12A internal PHY */
	if (internal_phy) {
	/mac wol/
	if (of_property_read_u32(np, "mac_wol",
	&support_mac_wol))
	pr_info("MAC wol not set\n");
	else
	pr_info("MAC wol :got wol %d .set it\n",
	support_mac_wol);
	/PLL/
	dwmac_meson_cfg_pll(ETH_PHY_config_addr, pdev);
	dwmac_meson_cfg_analog(ETH_PHY_config_addr, pdev);
	dwmac_meson_cfg_ctrl(ETH_PHY_config_addr);

	pin_ctl = devm_pinctrl_get_select
	(&pdev->dev, "internal_eth_pins");
	return REG_ETH_reg0_addr;
	}

	/config extern phy/
	if (internal_phy == 0) {
	/* only exphy support wol since g12a*/
	/we enable/disable wol with item in dts with "wol=<1>"/
	if (of_property_read_u32(np, "wol",
	&support_external_phy_wol))
	pr_debug("exphy wol not set\n");
	else
	pr_debug("exphy Ethernet :got wol %d .set it\n",
	support_external_phy_wol);

	/switch to extern phy/
	writel(0x0, ETH_PHY_config_addr + ETH_PHY_CNTL2);
	pin_ctl = devm_pinctrl_get_select
	(&pdev->dev, "external_eth_pins");
	return REG_ETH_reg0_addr;
	}

	pr_info("should not happen\n");
	return REG_ETH_reg0_addr;
	}

	void __iomem *phy_analog_config_addr;
	static int dwmac_meson_disable_analog(struct device *dev)
	{
	struct platform_device *pdev = to_platform_device(dev);
	void __iomem *phy_analog_config_addr = NULL;

	/map ETH_PLL address/
	phy_analog_config_addr = devm_ioremap_nocache
	(&pdev->dev,
	(resource_size_t)0xff64c000, 4);
	if (eth_power) {
	/todo/
	} else {
	writel(0x00000000, phy_analog_config_addr + 0x0);
	writel(0x003e0000, phy_analog_config_addr + 0x4);
	writel(0x12844008, phy_analog_config_addr + 0x8);
	writel(0x0800a40c, phy_analog_config_addr + 0xc);
	writel(0x00000000, phy_analog_config_addr + 0x10);
	writel(0x031d161c, phy_analog_config_addr + 0x14);
	writel(0x00001683, phy_analog_config_addr + 0x18);
	writel(0x09c0040a, phy_analog_config_addr + 0x44);
	}
	return 0;
	}

	static int dwmac_meson_recover_analog(struct device *dev)
	{
	struct platform_device *pdev = to_platform_device(dev);
	void __iomem *phy_analog_config_addr = NULL;

	/map ETH_PLL address/
	phy_analog_config_addr = devm_ioremap_nocache
	(&pdev->dev,
	(resource_size_t)0xff64c000, 4);
	pr_info("recover %p\n", phy_analog_config_addr);

	writel(0x19c0040a, phy_analog_config_addr + 0x44);
	writel(0x0, phy_analog_config_addr + 0x4);
	return 0;
	}

	static int meson6_dwmac_suspend(struct device *dev)
	{
	int ret;
	/shudown internal phy analog/
	struct pinctrl *pin_ctrl;
	struct pinctrl_state *turnoff_tes = NULL;

	/shudown internal phy analog/
	pr_info("suspend inter = %d\n", is_internal_phy);
	if ((is_internal_phy) && support_mac_wol == 0) {
	/turn off led/
	pin_ctrl = devm_pinctrl_get(dev);
	if (IS_ERR_OR_NULL(pin_ctrl)) {
	/led will not work/
	pr_info("pinctrl is null\n");
	} else {
	turnoff_tes = pinctrl_lookup_state
	(pin_ctrl, "internal_gpio_pins");
	if (IS_ERR_OR_NULL(turnoff_tes))
	pr_info("Not support gpio low\n");
	else
	pinctrl_select_state(pin_ctrl, turnoff_tes);

	devm_pinctrl_put(pin_ctrl);
	pin_ctrl = NULL;
	}
	dwmac_meson_disable_analog(dev);
	}
	ret = stmmac_pltfr_suspend(dev);

	return ret;
	}

	static int meson6_dwmac_resume(struct device *dev)
	{
	int ret;
	struct pinctrl *pin_ctrl;
	struct pinctrl_state *turnon_tes = NULL;

	pr_info("resuem inter = %d\n", is_internal_phy);
	if ((is_internal_phy) && support_mac_wol == 0) {
	pin_ctrl = devm_pinctrl_get(dev);
	if (IS_ERR_OR_NULL(pin_ctrl)) {
	pr_info("pinctrl is null\n");
	} else {
	turnon_tes = pinctrl_lookup_state
	(pin_ctrl, "internal_eth_pins");
	pinctrl_select_state(pin_ctrl, turnon_tes);
	devm_pinctrl_put(pin_ctrl);
	pin_ctrl = NULL;
	}
	dwmac_meson_recover_analog(dev);
	}
	ret = stmmac_pltfr_resume(dev);
	return ret;
	}
	EXPORT_SYMBOL_GPL(meson6_dwmac_resume);

	void meson6_dwmac_shutdown(struct platform_device *pdev)
	{
	struct pinctrl *pin_ctrl;
	struct pinctrl_state *turnoff_tes = NULL;
	/shudown internal phy analog/
	if (is_internal_phy) {
	pin_ctrl = devm_pinctrl_get(&pdev->dev);
	if (IS_ERR_OR_NULL(pin_ctrl)) {
	pr_info("pinctrl is null\n");
	} else {
	turnoff_tes = pinctrl_lookup_state
	(pin_ctrl, "internal_gpio_pins");
	if (IS_ERR_OR_NULL(turnoff_tes))
	pr_info("Not support gpio low\n");
	else
	pinctrl_select_state(pin_ctrl, turnoff_tes);

	//pinctrl_select_state(pin_ctrl, turnoff_tes);
	devm_pinctrl_put(pin_ctrl);
	pin_ctrl = NULL;
	}
	dwmac_meson_disable_analog(&pdev->dev);
	}
	stmmac_pltfr_suspend(&pdev->dev);
	}

	#endif

	static int meson6_dwmac_probe(struct platform_device *pdev)
	{
	struct plat_stmmacenet_data *plat_dat;
	struct stmmac_resources stmmac_res;
	struct meson_dwmac *dwmac;
	int ret;

	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
	if (ret)
	return ret;

	plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
	if (IS_ERR(plat_dat))
	return PTR_ERR(plat_dat);

	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
	if (!dwmac) {
	ret = -ENOMEM;
	goto err_remove_config_dt;
	}

	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	dwmac->reg = g12a_network_interface_setup(pdev);
	/* Custom initialisation (if needed) */
	if (plat_dat->init) {
	ret = plat_dat->init(pdev, plat_dat->bsp_priv);
	if (ret)
	return ret;
	}
	#else
	struct resource *res;
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(dwmac->reg)) {
	ret = PTR_ERR(dwmac->reg);
	goto err_remove_config_dt;
	}

	#endif
	plat_dat->bsp_priv = dwmac;
	plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;

	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
	if (ret)
	goto err_remove_config_dt;

	return 0;

	err_remove_config_dt:
	stmmac_remove_config_dt(pdev, plat_dat);

	return ret;
	}

	static const struct of_device_id meson6_dwmac_match[] = {
	{ .compatible = "amlogic,meson6-dwmac" },
	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	{ .compatible = "amlogic, g12a-eth-dwmac" },
	#endif
	{ }
	};
	MODULE_DEVICE_TABLE(of, meson6_dwmac_match);

	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, meson6_dwmac_suspend,
	meson6_dwmac_resume);
	#endif
	static struct platform_driver meson6_dwmac_driver = {
	.probe = meson6_dwmac_probe,
	.remove = stmmac_pltfr_remove,
	#ifdef CONFIG_AMLOGIC_ETH_PRIVE
	.shutdown = meson6_dwmac_shutdown,
	#endif
	.driver = {
	.name = "meson6-dwmac",
	.pm = &stmmac_pltfr_pm_ops,
	.of_match_table = meson6_dwmac_match,
	},
	};
	module_platform_driver(meson6_dwmac_driver);

	MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
	MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
	MODULE_LICENSE("GPL v2");