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1/*2 * Copyright (C) 2016 Broadcom3 *4 * This program is free software; you can redistribute it and/or5 * modify it under the terms of the GNU General Public License as6 * published by the Free Software Foundation version 2.7 *8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any9 * kind, whether express or implied; without even the implied warranty10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the11 * GNU General Public License for more details.12 */13 14#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt15 16#include <linux/bcma/bcma.h>17#include <linux/brcmphy.h>18#include <linux/etherdevice.h>19#include <linux/of_address.h>20#include <linux/of_mdio.h>21#include <linux/of_net.h>22#include "bgmac.h"23 24#define NICPM_PADRING_CFG 0x0000000425#define NICPM_IOMUX_CTRL 0x0000000826 27#define NICPM_PADRING_CFG_INIT_VAL 0x7400000028#define NICPM_IOMUX_CTRL_INIT_VAL_AX 0x2188000029 30#define NICPM_IOMUX_CTRL_INIT_VAL 0x3196e00031#define NICPM_IOMUX_CTRL_SPD_SHIFT 1032#define NICPM_IOMUX_CTRL_SPD_10M 033#define NICPM_IOMUX_CTRL_SPD_100M 134#define NICPM_IOMUX_CTRL_SPD_1000M 235 36static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)37{38 return readl(bgmac->plat.base + offset);39}40 41static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)42{43 writel(value, bgmac->plat.base + offset);44}45 46static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)47{48 return readl(bgmac->plat.idm_base + offset);49}50 51static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)52{53 writel(value, bgmac->plat.idm_base + offset);54}55 56static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)57{58 if (!bgmac->plat.idm_base)59 return true;60 61 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)62 return false;63 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)64 return false;65 return true;66}67 68static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)69{70 u32 val;71 72 if (!bgmac->plat.idm_base)73 return;74 75 /* The Reset Control register only contains a single bit to show if the76 * controller is currently in reset. Do a sanity check here, just in77 * case the bootloader happened to leave the device in reset.78 */79 val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);80 if (val) {81 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);82 bgmac_idm_read(bgmac, BCMA_RESET_CTL);83 udelay(1);84 }85 86 val = bgmac_idm_read(bgmac, BCMA_IOCTL);87 /* Some bits of BCMA_IOCTL set by HW/ATF and should not change */88 val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |89 BGMAC_ARUSER);90 val |= BGMAC_CLK_EN;91 bgmac_idm_write(bgmac, BCMA_IOCTL, val);92 bgmac_idm_read(bgmac, BCMA_IOCTL);93 udelay(1);94}95 96static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,97 u32 mask, u32 set)98{99 /* This shouldn't be encountered */100 WARN_ON(1);101}102 103static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)104{105 /* This shouldn't be encountered */106 WARN_ON(1);107 108 return 0;109}110 111static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,112 u32 mask, u32 set)113{114 /* This shouldn't be encountered */115 WARN_ON(1);116}117 118static void bgmac_nicpm_speed_set(struct net_device *net_dev)119{120 struct bgmac *bgmac = netdev_priv(net_dev);121 u32 val;122 123 if (!bgmac->plat.nicpm_base)124 return;125 126 /* SET RGMII IO CONFIG */127 writel(NICPM_PADRING_CFG_INIT_VAL,128 bgmac->plat.nicpm_base + NICPM_PADRING_CFG);129 130 val = NICPM_IOMUX_CTRL_INIT_VAL;131 switch (bgmac->net_dev->phydev->speed) {132 default:133 netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");134 fallthrough;135 case SPEED_1000:136 val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;137 break;138 case SPEED_100:139 val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;140 break;141 case SPEED_10:142 val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;143 break;144 }145 146 writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);147 148 bgmac_adjust_link(bgmac->net_dev);149}150 151static int platform_phy_connect(struct bgmac *bgmac)152{153 struct phy_device *phy_dev;154 155 if (bgmac->plat.nicpm_base)156 phy_dev = of_phy_get_and_connect(bgmac->net_dev,157 bgmac->dev->of_node,158 bgmac_nicpm_speed_set);159 else160 phy_dev = of_phy_get_and_connect(bgmac->net_dev,161 bgmac->dev->of_node,162 bgmac_adjust_link);163 if (!phy_dev) {164 dev_err(bgmac->dev, "PHY connection failed\n");165 return -ENODEV;166 }167 168 return 0;169}170 171static int bgmac_probe(struct platform_device *pdev)172{173 struct device_node *np = pdev->dev.of_node;174 struct bgmac *bgmac;175 struct resource *regs;176 int ret;177 178 bgmac = bgmac_alloc(&pdev->dev);179 if (!bgmac)180 return -ENOMEM;181 182 platform_set_drvdata(pdev, bgmac);183 184 /* Set the features of the 4707 family */185 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;186 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;187 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;188 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;189 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;190 bgmac->feature_flags |= BGMAC_FEAT_IDM_MASK;191 192 bgmac->dev = &pdev->dev;193 bgmac->dma_dev = &pdev->dev;194 195 ret = of_get_ethdev_address(np, bgmac->net_dev);196 if (ret == -EPROBE_DEFER)197 return ret;198 199 if (ret)200 dev_warn(&pdev->dev,201 "MAC address not present in device tree\n");202 203 bgmac->irq = platform_get_irq(pdev, 0);204 if (bgmac->irq < 0)205 return bgmac->irq;206 207 bgmac->plat.base =208 devm_platform_ioremap_resource_byname(pdev, "amac_base");209 if (IS_ERR(bgmac->plat.base))210 return PTR_ERR(bgmac->plat.base);211 212 /* The idm_base resource is optional for some platforms */213 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");214 if (regs) {215 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);216 if (IS_ERR(bgmac->plat.idm_base))217 return PTR_ERR(bgmac->plat.idm_base);218 bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;219 }220 221 /* The nicpm_base resource is optional for some platforms */222 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");223 if (regs) {224 bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,225 regs);226 if (IS_ERR(bgmac->plat.nicpm_base))227 return PTR_ERR(bgmac->plat.nicpm_base);228 }229 230 bgmac->read = platform_bgmac_read;231 bgmac->write = platform_bgmac_write;232 bgmac->idm_read = platform_bgmac_idm_read;233 bgmac->idm_write = platform_bgmac_idm_write;234 bgmac->clk_enabled = platform_bgmac_clk_enabled;235 bgmac->clk_enable = platform_bgmac_clk_enable;236 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;237 bgmac->get_bus_clock = platform_bgmac_get_bus_clock;238 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;239 if (of_parse_phandle(np, "phy-handle", 0)) {240 bgmac->phy_connect = platform_phy_connect;241 } else {242 bgmac->phy_connect = bgmac_phy_connect_direct;243 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;244 }245 246 return bgmac_enet_probe(bgmac);247}248 249static void bgmac_remove(struct platform_device *pdev)250{251 struct bgmac *bgmac = platform_get_drvdata(pdev);252 253 bgmac_enet_remove(bgmac);254}255 256#ifdef CONFIG_PM257static int bgmac_suspend(struct device *dev)258{259 struct bgmac *bgmac = dev_get_drvdata(dev);260 261 return bgmac_enet_suspend(bgmac);262}263 264static int bgmac_resume(struct device *dev)265{266 struct bgmac *bgmac = dev_get_drvdata(dev);267 268 return bgmac_enet_resume(bgmac);269}270 271static const struct dev_pm_ops bgmac_pm_ops = {272 .suspend = bgmac_suspend,273 .resume = bgmac_resume274};275 276#define BGMAC_PM_OPS (&bgmac_pm_ops)277#else278#define BGMAC_PM_OPS NULL279#endif /* CONFIG_PM */280 281static const struct of_device_id bgmac_of_enet_match[] = {282 {.compatible = "brcm,amac",},283 {.compatible = "brcm,nsp-amac",},284 {.compatible = "brcm,ns2-amac",},285 {},286};287 288MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);289 290static struct platform_driver bgmac_enet_driver = {291 .driver = {292 .name = "bgmac-enet",293 .of_match_table = bgmac_of_enet_match,294 .pm = BGMAC_PM_OPS295 },296 .probe = bgmac_probe,297 .remove_new = bgmac_remove,298};299 300module_platform_driver(bgmac_enet_driver);301MODULE_DESCRIPTION("Broadcom iProc GBit platform interface driver");302MODULE_LICENSE("GPL");303