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Commit 15f6bc7c authored by Sneh Shah's avatar Sneh Shah Committed by Gerrit - the friendly Code Review server
Browse files

net: stmmac: SDx55 EMAC HW configuration changes 



Add RGMII config and regulator support for EMAC HW configuration on SDx55.

Change-Id: I7b1cd3bcb7c78f5fa1c684d2523a41c51da72998
Acked-by: default avatarSuraj Jaiswal <jsuraj@codeaurora.org>
Acked-by: default avatarNagarjuna Chaganti <nchagant@qti.qualcomm.com>
Signed-off-by: default avatarSneh Shah <snehshah@codeaurora.org>
parent eafa5790

drivers/net/ethernet/stmicro/stmmac/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o 
obj-$(CONFIG_DWMAC_MEDIATEK)	+= dwmac-mediatek.o

obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o

obj-$(CONFIG_DWMAC_OXNAS)	+= dwmac-oxnas.o

obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-gpio.o

obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o

obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o

obj-$(CONFIG_DWMAC_SOCFPGA)	+= dwmac-altr-socfpga.o

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

+92 −79
Original line number Diff line number Diff line
@@ -6,16 +6,12 @@ 
#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/phy.h>

#include <linux/regulator/consumer.h>



#include "stmmac.h"

#include "stmmac_platform.h"

#include "dwmac-qcom-ethqos.h"



#define RGMII_IO_MACRO_CONFIG		0x0

#define SDCC_HC_REG_DLL_CONFIG		0x4

#define SDCC_HC_REG_DDR_CONFIG		0xC

#define SDCC_HC_REG_DLL_CONFIG2		0x10

#define SDC4_STATUS			0x14

#define SDCC_USR_CTL			0x18

#define RGMII_IO_MACRO_CONFIG2		0x1C

#define RGMII_IO_MACRO_DEBUG1		0x20

#define EMAC_SYSTEM_LOW_POWER_DEBUG	0x28
@@ -70,27 +66,8 @@ 
#define RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL	BIT(6)

#define RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN	BIT(5)



struct ethqos_emac_por {

	unsigned int offset;

	unsigned int value;

};



struct ethqos_emac_driver_data {

	const struct ethqos_emac_por *por;

	unsigned int num_por;

};



struct qcom_ethqos {

	struct platform_device *pdev;

	void __iomem *rgmii_base;



	unsigned int rgmii_clk_rate;

	struct clk *rgmii_clk;

	unsigned int speed;



	const struct ethqos_emac_por *por;

	unsigned int num_por;

};

#define EMAC_I0_EMAC_CORE_HW_VERSION_RGOFFADDR 0x00000070

#define EMAC_HW_v2_3_2_RG 0x20030002



static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)

{
@@ -167,26 +144,16 @@ static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos) 
		      RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);

}



static const struct ethqos_emac_por emac_v2_3_0_por[] = {

	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x00C01343 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642C },

	{ .offset = SDCC_HC_REG_DDR_CONFIG,	.value = 0x00000000 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG2,	.value = 0x00200000 },

	{ .offset = SDCC_USR_CTL,		.value = 0x00010800 },

	{ .offset = RGMII_IO_MACRO_CONFIG2,	.value = 0x00002060 },

};



static const struct ethqos_emac_driver_data emac_v2_3_0_data = {

	.por = emac_v2_3_0_por,

	.num_por = ARRAY_SIZE(emac_v2_3_0_por),

};



static int ethqos_dll_configure(struct qcom_ethqos *ethqos)

{

	unsigned int val;

	int retry = 1000;



	/* Set CDR_EN */

	if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,

			      0, SDCC_HC_REG_DLL_CONFIG);

	else

		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,

			      SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
@@ -202,12 +169,13 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos) 
	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,

		      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);



	if (ethqos->emac_ver != EMAC_HW_v2_3_2_RG) {

		rgmii_updatel(ethqos, SDCC_DLL_MCLK_GATING_EN,

			      0, SDCC_HC_REG_DLL_CONFIG);



		rgmii_updatel(ethqos, SDCC_DLL_CDR_FINE_PHASE,

			      0, SDCC_HC_REG_DLL_CONFIG);



	}

	/* Wait for CK_OUT_EN clear */

	do {

		val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
@@ -241,6 +209,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos) 
	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,

		      SDCC_DLL_CONFIG2_DDR_CAL_EN, SDCC_HC_REG_DLL_CONFIG2);



	if (ethqos->emac_ver != EMAC_HW_v2_3_2_RG) {

		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,

			      0, SDCC_HC_REG_DLL_CONFIG2);
@@ -253,6 +222,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos) 
		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,

			      SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,

			      SDCC_HC_REG_DLL_CONFIG2);

	}



	return 0;

}
@@ -290,13 +260,22 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) 
			      RGMII_IO_MACRO_CONFIG2);



		/* Set PRG_RCLK_DLY to 57 for 1.8 ns delay */

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,

				      69, SDCC_HC_REG_DDR_CONFIG);

		else

			rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,

				      57, SDCC_HC_REG_DDR_CONFIG);

		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,

			      SDCC_DDR_CONFIG_PRG_DLY_EN,

			      SDCC_HC_REG_DDR_CONFIG);

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

				      0, RGMII_IO_MACRO_CONFIG);

		else

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);

				      RGMII_CONFIG_LOOPBACK_EN,

				      RGMII_IO_MACRO_CONFIG);

		break;



	case SPEED_100:
@@ -318,6 +297,11 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) 
			      BIT(6), RGMII_IO_MACRO_CONFIG);

		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,

			      0, RGMII_IO_MACRO_CONFIG2);

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,

				      RGMII_CONFIG2_RX_PROG_SWAP,

				      RGMII_IO_MACRO_CONFIG2);

		else

			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,

				      0, RGMII_IO_MACRO_CONFIG2);

		/* Write 0x5 to PRG_RCLK_DLY_CODE */
@@ -329,8 +313,13 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) 
		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,

			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,

			      SDCC_HC_REG_DDR_CONFIG);

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

				      0, RGMII_IO_MACRO_CONFIG);

		else

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);

				      RGMII_CONFIG_LOOPBACK_EN,

				      RGMII_IO_MACRO_CONFIG);

		break;



	case SPEED_10:
@@ -345,13 +334,25 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) 
			      0, RGMII_IO_MACRO_CONFIG);

		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,

			      0, RGMII_IO_MACRO_CONFIG2);

		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos,

				      RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,

				      RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,

				      RGMII_IO_MACRO_CONFIG2);

		else

			rgmii_updatel(ethqos,

				      RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,

				      0, RGMII_IO_MACRO_CONFIG2);

		rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_9,

			      BIT(12) | GENMASK(9, 8),

			      RGMII_IO_MACRO_CONFIG);

		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,

			      0, RGMII_IO_MACRO_CONFIG2);

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,

				      RGMII_CONFIG2_RX_PROG_SWAP,

				      RGMII_IO_MACRO_CONFIG2);

		else

			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,

				      0, RGMII_IO_MACRO_CONFIG2);

		/* Write 0x5 to PRG_RCLK_DLY_CODE */
@@ -363,8 +364,13 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) 
		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,

			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,

			      SDCC_HC_REG_DDR_CONFIG);

		if (ethqos->emac_ver == EMAC_HW_v2_3_2_RG)

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

				      0, RGMII_IO_MACRO_CONFIG);

		else

			rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,

			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);

				      RGMII_CONFIG_LOOPBACK_EN,

				      RGMII_IO_MACRO_CONFIG);

		break;

	default:

		dev_err(&ethqos->pdev->dev,
@@ -461,19 +467,21 @@ static int qcom_ethqos_probe(struct platform_device *pdev) 
	if (ret)

		return ret;



	ethqos = devm_kzalloc(&pdev->dev, sizeof(*ethqos), GFP_KERNEL);

	if (!ethqos) {

		ret = -ENOMEM;

		goto err_mem;

	}

	ethqos->pdev = pdev;



	ethqos_init_reqgulators(ethqos);

	plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);

	if (IS_ERR(plat_dat)) {

		dev_err(&pdev->dev, "dt configuration failed\n");

		return PTR_ERR(plat_dat);

	}



	ethqos = devm_kzalloc(&pdev->dev, sizeof(*ethqos), GFP_KERNEL);

	if (!ethqos) {

		ret = -ENOMEM;

		goto err_mem;

	}



	ethqos->pdev = pdev;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rgmii");

	ethqos->rgmii_base = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(ethqos->rgmii_base)) {
@@ -510,6 +518,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev) 
	if (ret)

		goto err_clk;



	ethqos->emac_ver = rgmii_readl(ethqos,

				       EMAC_I0_EMAC_CORE_HW_VERSION_RGOFFADDR);



	rgmii_dump(ethqos);



	return ret;
@@ -534,12 +545,14 @@ static int qcom_ethqos_remove(struct platform_device *pdev) 


	ret = stmmac_pltfr_remove(pdev);

	clk_disable_unprepare(ethqos->rgmii_clk);

	ethqos_disable_regulators(ethqos);



	return ret;

}



static const struct of_device_id qcom_ethqos_match[] = {

	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_data},

	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_por},

	{ .compatible = "qcom,sdxprairie-ethqos", .data = &emac_v2_3_2_por},

	{ }

};

MODULE_DEVICE_TABLE(of, qcom_ethqos_match);

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.h

0 → 100644
+66 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/* Copyright (c) 2021, The Linux Foundation. All rights reserved.

 */

#ifndef	_DWMAC_QCOM_ETHQOS_H

#define	_DWMAC_QCOM_ETHQOS_H



#define DRV_NAME "qcom-ethqos"

#define ETHQOSDBG(fmt, args...) \

	pr_debug(DRV_NAME " %s:%d " fmt, __func__, ## args)

#define ETHQOSERR(fmt, args...) \

	pr_err(DRV_NAME " %s:%d " fmt, __func__, ## args)

#define ETHQOSINFO(fmt, args...) \

	pr_info(DRV_NAME " %s:%d " fmt, __func__, ## args)



#define RGMII_IO_MACRO_CONFIG		0x0

#define SDCC_HC_REG_DLL_CONFIG		0x4

#define SDCC_HC_REG_DDR_CONFIG		0xC

#define SDCC_HC_REG_DLL_CONFIG2		0x10

#define SDC4_STATUS			0x14

#define SDCC_USR_CTL			0x18

#define RGMII_IO_MACRO_CONFIG2		0x1C



struct ethqos_emac_por {

	unsigned int offset;

	unsigned int value;

};



static const struct ethqos_emac_por emac_v2_3_0_por[] = {

	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x00C01343 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642C },

	{ .offset = SDCC_HC_REG_DDR_CONFIG,	.value = 0x00000000 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG2,	.value = 0x00200000 },

	{ .offset = SDCC_USR_CTL,		.value = 0x00010800 },

	{ .offset = RGMII_IO_MACRO_CONFIG2,	.value = 0x00002060 },

};



static const struct ethqos_emac_por emac_v2_3_2_por[] = {

	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x00C01343 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642C },

	{ .offset = SDCC_HC_REG_DDR_CONFIG,	.value = 0x80040800 },

	{ .offset = SDCC_HC_REG_DLL_CONFIG2,	.value = 0x00200000 },

	{ .offset = SDCC_USR_CTL,		.value = 0x00010800 },

	{ .offset = RGMII_IO_MACRO_CONFIG2,	.value = 0x00002060 },

};



struct qcom_ethqos {

	struct platform_device *pdev;

	void __iomem *rgmii_base;



	unsigned int rgmii_clk_rate;

	struct clk *rgmii_clk;

	unsigned int speed;



	const struct ethqos_emac_por *por;

	unsigned int num_por;

	unsigned int emac_ver;



	struct regulator *gdsc_emac;

	struct regulator *reg_rgmii;

	struct regulator *reg_emac_phy;

	struct regulator *reg_rgmii_io_pads;

};



int ethqos_init_reqgulators(struct qcom_ethqos *ethqos);

void ethqos_disable_regulators(struct qcom_ethqos *ethqos);

#endif

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-gpio.c

0 → 100644
+129 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/* Copyright (c) 2021, The Linux Foundation. All rights reserved.

 */

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/phy.h>

#include <linux/regulator/consumer.h>



#include "stmmac.h"

#include "dwmac-qcom-ethqos.h"



#define EMAC_GDSC_EMAC_NAME "gdsc_emac"

#define EMAC_VREG_RGMII_NAME "vreg_rgmii"

#define EMAC_VREG_EMAC_PHY_NAME "vreg_emac_phy"

#define EMAC_VREG_RGMII_IO_PADS_NAME "vreg_rgmii_io_pads"



int ethqos_init_reqgulators(struct qcom_ethqos *ethqos)

{

	int ret = 0;



	if (of_property_read_bool(ethqos->pdev->dev.of_node,

				  "gdsc_emac-supply")) {

		ethqos->gdsc_emac =

		devm_regulator_get(&ethqos->pdev->dev, EMAC_GDSC_EMAC_NAME);

		if (IS_ERR(ethqos->gdsc_emac)) {

			ETHQOSERR("Can not get <%s>\n", EMAC_GDSC_EMAC_NAME);

			return PTR_ERR(ethqos->gdsc_emac);

		}



		ret = regulator_enable(ethqos->gdsc_emac);

		if (ret) {

			ETHQOSERR("Can not enable <%s>\n", EMAC_GDSC_EMAC_NAME);

			goto reg_error;

		}



		ETHQOSDBG("Enabled <%s>\n", EMAC_GDSC_EMAC_NAME);

	}



	if (of_property_read_bool(ethqos->pdev->dev.of_node,

				  "vreg_rgmii-supply")) {

		ethqos->reg_rgmii =

		devm_regulator_get(&ethqos->pdev->dev, EMAC_VREG_RGMII_NAME);

		if (IS_ERR(ethqos->reg_rgmii)) {

			ETHQOSERR("Can not get <%s>\n", EMAC_VREG_RGMII_NAME);

			return PTR_ERR(ethqos->reg_rgmii);

		}



		ret = regulator_enable(ethqos->reg_rgmii);

		if (ret) {

			ETHQOSERR("Can not enable <%s>\n",

				  EMAC_VREG_RGMII_NAME);

			goto reg_error;

		}



		ETHQOSDBG("Enabled <%s>\n", EMAC_VREG_RGMII_NAME);

	}



	if (of_property_read_bool(ethqos->pdev->dev.of_node,

				  "vreg_emac_phy-supply")) {

		ethqos->reg_emac_phy =

		devm_regulator_get(&ethqos->pdev->dev, EMAC_VREG_EMAC_PHY_NAME);

		if (IS_ERR(ethqos->reg_emac_phy)) {

			ETHQOSERR("Can not get <%s>\n",

				  EMAC_VREG_EMAC_PHY_NAME);

			return PTR_ERR(ethqos->reg_emac_phy);

		}



		ret = regulator_enable(ethqos->reg_emac_phy);

		if (ret) {

			ETHQOSERR("Can not enable <%s>\n",

				  EMAC_VREG_EMAC_PHY_NAME);

			goto reg_error;

		}



		ETHQOSDBG("Enabled <%s>\n", EMAC_VREG_EMAC_PHY_NAME);

	}



	if (of_property_read_bool(ethqos->pdev->dev.of_node,

				  "vreg_rgmii_io_pads-supply")) {

		ethqos->reg_rgmii_io_pads = devm_regulator_get

		(&ethqos->pdev->dev, EMAC_VREG_RGMII_IO_PADS_NAME);

		if (IS_ERR(ethqos->reg_rgmii_io_pads)) {

			ETHQOSERR("Can not get <%s>\n",

				  EMAC_VREG_RGMII_IO_PADS_NAME);

			return PTR_ERR(ethqos->reg_rgmii_io_pads);

		}



		ret = regulator_enable(ethqos->reg_rgmii_io_pads);

		if (ret) {

			ETHQOSERR("Can not enable <%s>\n",

				  EMAC_VREG_RGMII_IO_PADS_NAME);

			goto reg_error;

		}



		ETHQOSDBG("Enabled <%s>\n", EMAC_VREG_RGMII_IO_PADS_NAME);

	}



	return ret;



reg_error:

	ETHQOSERR("%s failed\n", __func__);

	ethqos_disable_regulators(ethqos);

	return ret;

}



void ethqos_disable_regulators(struct qcom_ethqos *ethqos)

{

	if (ethqos->reg_rgmii) {

		regulator_disable(ethqos->reg_rgmii);

		ethqos->reg_rgmii = NULL;

	}



	if (ethqos->reg_emac_phy) {

		regulator_disable(ethqos->reg_emac_phy);

		ethqos->reg_emac_phy = NULL;

	}



	if (ethqos->reg_rgmii_io_pads) {

		regulator_disable(ethqos->reg_rgmii_io_pads);

		ethqos->reg_rgmii_io_pads = NULL;

	}



	if (ethqos->gdsc_emac) {

		regulator_disable(ethqos->gdsc_emac);

		ethqos->gdsc_emac = NULL;

	}

}