drivers/net/ethernet/broadcom/bgmac-platform.c - arm/linux - Git at Google

 /*
  * Copyright (C) 2016 Broadcom
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation version 2.
  *
  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  * kind, whether express or implied; without even the implied warranty
  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt

 #include <linux/bcma/bcma.h>
 #include <linux/brcmphy.h>
 #include <linux/etherdevice.h>
 #include <linux/of_address.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include "bgmac.h"

 #define NICPM_IOMUX_CTRL		0x00000008

 #define NICPM_IOMUX_CTRL_INIT_VAL	0x3196e000
 #define NICPM_IOMUX_CTRL_SPD_SHIFT	10
 #define NICPM_IOMUX_CTRL_SPD_10M	0
 #define NICPM_IOMUX_CTRL_SPD_100M	1
 #define NICPM_IOMUX_CTRL_SPD_1000M	2

 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
 {
 	return readl(bgmac->plat.base + offset);
 }

 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
 {
 	writel(value, bgmac->plat.base + offset);
 }

 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
 {
 	return readl(bgmac->plat.idm_base + offset);
 }

 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
 {
 	return writel(value, bgmac->plat.idm_base + offset);
 }

 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
 {
 	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
 		return false;
 	if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
 		return false;
 	return true;
 }

 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
 {
 	u32 val;

 	/* The Reset Control register only contains a single bit to show if the
 	 * controller is currently in reset.  Do a sanity check here, just in
 	 * case the bootloader happened to leave the device in reset.
 	 */
 	val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
 	if (val) {
 		bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
 		bgmac_idm_read(bgmac, BCMA_RESET_CTL);
 		udelay(1);
 	}

 	val = bgmac_idm_read(bgmac, BCMA_IOCTL);
 	/* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
 	val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |
 			 BGMAC_ARUSER);
 	val |= BGMAC_CLK_EN;
 	bgmac_idm_write(bgmac, BCMA_IOCTL, val);
 	bgmac_idm_read(bgmac, BCMA_IOCTL);
 	udelay(1);
 }

 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
 					   u32 mask, u32 set)
 {
 	/* This shouldn't be encountered */
 	WARN_ON(1);
 }

 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
 {
 	/* This shouldn't be encountered */
 	WARN_ON(1);

 	return 0;
 }

 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
 					 u32 mask, u32 set)
 {
 	/* This shouldn't be encountered */
 	WARN_ON(1);
 }

 static void bgmac_nicpm_speed_set(struct net_device *net_dev)
 {
 	struct bgmac *bgmac = netdev_priv(net_dev);
 	u32 val;

 	if (!bgmac->plat.nicpm_base)
 		return;

 	val = NICPM_IOMUX_CTRL_INIT_VAL;
 	switch (bgmac->net_dev->phydev->speed) {
 	default:
 		netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
 	case SPEED_1000:
 		val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
 		break;
 	case SPEED_100:
 		val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
 		break;
 	case SPEED_10:
 		val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
 		break;
 	}

 	writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);

 	bgmac_adjust_link(bgmac->net_dev);
 }

 static int platform_phy_connect(struct bgmac *bgmac)
 {
 	struct phy_device *phy_dev;

 	if (bgmac->plat.nicpm_base)
 		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
 						 bgmac->dev->of_node,
 						 bgmac_nicpm_speed_set);
 	else
 		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
 						 bgmac->dev->of_node,
 						 bgmac_adjust_link);
 	if (!phy_dev) {
 		dev_err(bgmac->dev, "PHY connection failed\n");
 		return -ENODEV;
 	}

 	return 0;
 }

 static int bgmac_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct bgmac *bgmac;
 	struct resource *regs;
 	const u8 *mac_addr;

 	bgmac = bgmac_alloc(&pdev->dev);
 	if (!bgmac)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, bgmac);

 	/* Set the features of the 4707 family */
 	bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 	bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
 	bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
 	bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
 	bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;

 	bgmac->dev = &pdev->dev;
 	bgmac->dma_dev = &pdev->dev;

 	mac_addr = of_get_mac_address(np);
 	if (mac_addr)
 		ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
 	else
 		dev_warn(&pdev->dev, "MAC address not present in device tree\n");

 	bgmac->irq = platform_get_irq(pdev, 0);
 	if (bgmac->irq < 0) {
 		dev_err(&pdev->dev, "Unable to obtain IRQ\n");
 		return bgmac->irq;
 	}

 	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
 	if (!regs) {
 		dev_err(&pdev->dev, "Unable to obtain base resource\n");
 		return -EINVAL;
 	}

 	bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
 	if (IS_ERR(bgmac->plat.base))
 		return PTR_ERR(bgmac->plat.base);

 	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
 	if (!regs) {
 		dev_err(&pdev->dev, "Unable to obtain idm resource\n");
 		return -EINVAL;
 	}

 	bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
 	if (IS_ERR(bgmac->plat.idm_base))
 		return PTR_ERR(bgmac->plat.idm_base);

 	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
 	if (regs) {
 		bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
 							       regs);
 		if (IS_ERR(bgmac->plat.nicpm_base))
 			return PTR_ERR(bgmac->plat.nicpm_base);
 	}

 	bgmac->read = platform_bgmac_read;
 	bgmac->write = platform_bgmac_write;
 	bgmac->idm_read = platform_bgmac_idm_read;
 	bgmac->idm_write = platform_bgmac_idm_write;
 	bgmac->clk_enabled = platform_bgmac_clk_enabled;
 	bgmac->clk_enable = platform_bgmac_clk_enable;
 	bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
 	bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
 	bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
 	if (of_parse_phandle(np, "phy-handle", 0)) {
 		bgmac->phy_connect = platform_phy_connect;
 	} else {
 		bgmac->phy_connect = bgmac_phy_connect_direct;
 		bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
 	}

 	return bgmac_enet_probe(bgmac);
 }

 static int bgmac_remove(struct platform_device *pdev)
 {
 	struct bgmac *bgmac = platform_get_drvdata(pdev);

 	bgmac_enet_remove(bgmac);

 	return 0;
 }

 static const struct of_device_id bgmac_of_enet_match[] = {
 	{.compatible = "brcm,amac",},
 	{.compatible = "brcm,nsp-amac",},
 	{.compatible = "brcm,ns2-amac",},
 	{},
 };

 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);

 static struct platform_driver bgmac_enet_driver = {
 	.driver = {
 		.name  = "bgmac-enet",
 		.of_match_table = bgmac_of_enet_match,
 	},
 	.probe = bgmac_probe,
 	.remove = bgmac_remove,
 };

 module_platform_driver(bgmac_enet_driver);
 MODULE_LICENSE("GPL");
	/*
	* Copyright (C) 2016 Broadcom
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation version 2.
	*
	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	* kind, whether express or implied; without even the implied warranty
	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include <linux/bcma/bcma.h>
	#include <linux/brcmphy.h>
	#include <linux/etherdevice.h>
	#include <linux/of_address.h>
	#include <linux/of_mdio.h>
	#include <linux/of_net.h>
	#include "bgmac.h"

	#define NICPM_IOMUX_CTRL 0x00000008

	#define NICPM_IOMUX_CTRL_INIT_VAL 0x3196e000
	#define NICPM_IOMUX_CTRL_SPD_SHIFT 10
	#define NICPM_IOMUX_CTRL_SPD_10M 0
	#define NICPM_IOMUX_CTRL_SPD_100M 1
	#define NICPM_IOMUX_CTRL_SPD_1000M 2

	static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
	{
	return readl(bgmac->plat.base + offset);
	}

	static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
	{
	writel(value, bgmac->plat.base + offset);
	}

	static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
	{
	return readl(bgmac->plat.idm_base + offset);
	}

	static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
	{
	return writel(value, bgmac->plat.idm_base + offset);
	}

	static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
	{
	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
	return false;
	if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
	return false;
	return true;
	}

	static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
	{
	u32 val;

	/* The Reset Control register only contains a single bit to show if the
	* controller is currently in reset. Do a sanity check here, just in
	* case the bootloader happened to leave the device in reset.
	*/
	val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
	if (val) {
	bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
	bgmac_idm_read(bgmac, BCMA_RESET_CTL);
	udelay(1);
	}

	val = bgmac_idm_read(bgmac, BCMA_IOCTL);
	/* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
	val \|= flags & ~(BGMAC_AWCACHE \| BGMAC_ARCACHE \| BGMAC_AWUSER \|
	BGMAC_ARUSER);
	val \|= BGMAC_CLK_EN;
	bgmac_idm_write(bgmac, BCMA_IOCTL, val);
	bgmac_idm_read(bgmac, BCMA_IOCTL);
	udelay(1);
	}

	static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
	u32 mask, u32 set)
	{
	/* This shouldn't be encountered */
	WARN_ON(1);
	}

	static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
	{
	/* This shouldn't be encountered */
	WARN_ON(1);

	return 0;
	}

	static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
	u32 mask, u32 set)
	{
	/* This shouldn't be encountered */
	WARN_ON(1);
	}

	static void bgmac_nicpm_speed_set(struct net_device *net_dev)
	{
	struct bgmac *bgmac = netdev_priv(net_dev);
	u32 val;

	if (!bgmac->plat.nicpm_base)
	return;

	val = NICPM_IOMUX_CTRL_INIT_VAL;
	switch (bgmac->net_dev->phydev->speed) {
	default:
	netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
	case SPEED_1000:
	val \|= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
	break;
	case SPEED_100:
	val \|= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
	break;
	case SPEED_10:
	val \|= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
	break;
	}

	writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);

	bgmac_adjust_link(bgmac->net_dev);
	}

	static int platform_phy_connect(struct bgmac *bgmac)
	{
	struct phy_device *phy_dev;

	if (bgmac->plat.nicpm_base)
	phy_dev = of_phy_get_and_connect(bgmac->net_dev,
	bgmac->dev->of_node,
	bgmac_nicpm_speed_set);
	else
	phy_dev = of_phy_get_and_connect(bgmac->net_dev,
	bgmac->dev->of_node,
	bgmac_adjust_link);
	if (!phy_dev) {
	dev_err(bgmac->dev, "PHY connection failed\n");
	return -ENODEV;
	}

	return 0;
	}

	static int bgmac_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct bgmac *bgmac;
	struct resource *regs;
	const u8 *mac_addr;

	bgmac = bgmac_alloc(&pdev->dev);
	if (!bgmac)
	return -ENOMEM;

	platform_set_drvdata(pdev, bgmac);

	/* Set the features of the 4707 family */
	bgmac->feature_flags \|= BGMAC_FEAT_CLKCTLST;
	bgmac->feature_flags \|= BGMAC_FEAT_NO_RESET;
	bgmac->feature_flags \|= BGMAC_FEAT_CMDCFG_SR_REV4;
	bgmac->feature_flags \|= BGMAC_FEAT_TX_MASK_SETUP;
	bgmac->feature_flags \|= BGMAC_FEAT_RX_MASK_SETUP;

	bgmac->dev = &pdev->dev;
	bgmac->dma_dev = &pdev->dev;

	mac_addr = of_get_mac_address(np);
	if (mac_addr)
	ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
	else
	dev_warn(&pdev->dev, "MAC address not present in device tree\n");

	bgmac->irq = platform_get_irq(pdev, 0);
	if (bgmac->irq < 0) {
	dev_err(&pdev->dev, "Unable to obtain IRQ\n");
	return bgmac->irq;
	}

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
	if (!regs) {
	dev_err(&pdev->dev, "Unable to obtain base resource\n");
	return -EINVAL;
	}

	bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
	if (IS_ERR(bgmac->plat.base))
	return PTR_ERR(bgmac->plat.base);

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
	if (!regs) {
	dev_err(&pdev->dev, "Unable to obtain idm resource\n");
	return -EINVAL;
	}

	bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
	if (IS_ERR(bgmac->plat.idm_base))
	return PTR_ERR(bgmac->plat.idm_base);

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
	if (regs) {
	bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
	regs);
	if (IS_ERR(bgmac->plat.nicpm_base))
	return PTR_ERR(bgmac->plat.nicpm_base);
	}

	bgmac->read = platform_bgmac_read;
	bgmac->write = platform_bgmac_write;
	bgmac->idm_read = platform_bgmac_idm_read;
	bgmac->idm_write = platform_bgmac_idm_write;
	bgmac->clk_enabled = platform_bgmac_clk_enabled;
	bgmac->clk_enable = platform_bgmac_clk_enable;
	bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
	bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
	bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
	if (of_parse_phandle(np, "phy-handle", 0)) {
	bgmac->phy_connect = platform_phy_connect;
	} else {
	bgmac->phy_connect = bgmac_phy_connect_direct;
	bgmac->feature_flags \|= BGMAC_FEAT_FORCE_SPEED_2500;
	}

	return bgmac_enet_probe(bgmac);
	}

	static int bgmac_remove(struct platform_device *pdev)
	{
	struct bgmac *bgmac = platform_get_drvdata(pdev);

	bgmac_enet_remove(bgmac);

	return 0;
	}

	static const struct of_device_id bgmac_of_enet_match[] = {
	{.compatible = "brcm,amac",},
	{.compatible = "brcm,nsp-amac",},
	{.compatible = "brcm,ns2-amac",},
	{},
	};

	MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);

	static struct platform_driver bgmac_enet_driver = {
	.driver = {
	.name = "bgmac-enet",
	.of_match_table = bgmac_of_enet_match,
	},
	.probe = bgmac_probe,
	.remove = bgmac_remove,
	};

	module_platform_driver(bgmac_enet_driver);
	MODULE_LICENSE("GPL");