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1/*2 * DWMAC glue for NXP LPC18xx/LPC43xx Ethernet3 *4 * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>5 *6 * This file is licensed under the terms of the GNU General Public7 * License version 2. This program is licensed "as is" without any8 * warranty of any kind, whether express or implied.9 */10 11#include <linux/mfd/syscon.h>12#include <linux/module.h>13#include <linux/of.h>14#include <linux/of_net.h>15#include <linux/phy.h>16#include <linux/platform_device.h>17#include <linux/regmap.h>18#include <linux/stmmac.h>19 20#include "stmmac_platform.h"21 22/* Register defines for CREG syscon */23#define LPC18XX_CREG_CREG6 0x12c24# define LPC18XX_CREG_CREG6_ETHMODE_MASK 0x725# define LPC18XX_CREG_CREG6_ETHMODE_MII 0x026# define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x427 28static int lpc18xx_dwmac_probe(struct platform_device *pdev)29{30 struct plat_stmmacenet_data *plat_dat;31 struct stmmac_resources stmmac_res;32 struct regmap *reg;33 u8 ethmode;34 int ret;35 36 ret = stmmac_get_platform_resources(pdev, &stmmac_res);37 if (ret)38 return ret;39 40 plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);41 if (IS_ERR(plat_dat))42 return PTR_ERR(plat_dat);43 44 plat_dat->has_gmac = true;45 46 reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");47 if (IS_ERR(reg)) {48 dev_err(&pdev->dev, "syscon lookup failed\n");49 return PTR_ERR(reg);50 }51 52 if (plat_dat->mac_interface == PHY_INTERFACE_MODE_MII) {53 ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII;54 } else if (plat_dat->mac_interface == PHY_INTERFACE_MODE_RMII) {55 ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII;56 } else {57 dev_err(&pdev->dev, "Only MII and RMII mode supported\n");58 return -EINVAL;59 }60 61 regmap_update_bits(reg, LPC18XX_CREG_CREG6,62 LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode);63 64 return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);65}66 67static const struct of_device_id lpc18xx_dwmac_match[] = {68 { .compatible = "nxp,lpc1850-dwmac" },69 { }70};71MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match);72 73static struct platform_driver lpc18xx_dwmac_driver = {74 .probe = lpc18xx_dwmac_probe,75 .remove_new = stmmac_pltfr_remove,76 .driver = {77 .name = "lpc18xx-dwmac",78 .pm = &stmmac_pltfr_pm_ops,79 .of_match_table = lpc18xx_dwmac_match,80 },81};82module_platform_driver(lpc18xx_dwmac_driver);83 84MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");85MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet");86MODULE_LICENSE("GPL v2");87