/*
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* DWMAC glue for NXP LPC18xx/LPC43xx Ethernet
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*
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* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/stmmac.h>
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#include "stmmac_platform.h"
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/* Register defines for CREG syscon */
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#define LPC18XX_CREG_CREG6 0x12c
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# define LPC18XX_CREG_CREG6_ETHMODE_MASK 0x7
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# define LPC18XX_CREG_CREG6_ETHMODE_MII 0x0
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# define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x4
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static int lpc18xx_dwmac_probe(struct platform_device *pdev)
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{
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struct plat_stmmacenet_data *plat_dat;
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struct stmmac_resources stmmac_res;
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struct regmap *reg;
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u8 ethmode;
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int ret;
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ret = stmmac_get_platform_resources(pdev, &stmmac_res);
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if (ret)
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return ret;
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plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
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if (IS_ERR(plat_dat))
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return PTR_ERR(plat_dat);
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plat_dat->has_gmac = true;
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reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
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if (IS_ERR(reg)) {
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dev_err(&pdev->dev, "syscon lookup failed\n");
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ret = PTR_ERR(reg);
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goto err_remove_config_dt;
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}
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if (plat_dat->interface == PHY_INTERFACE_MODE_MII) {
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ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII;
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} else if (plat_dat->interface == PHY_INTERFACE_MODE_RMII) {
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ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII;
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} else {
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dev_err(&pdev->dev, "Only MII and RMII mode supported\n");
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ret = -EINVAL;
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goto err_remove_config_dt;
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}
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regmap_update_bits(reg, LPC18XX_CREG_CREG6,
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LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode);
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ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
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if (ret)
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goto err_remove_config_dt;
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return 0;
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err_remove_config_dt:
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stmmac_remove_config_dt(pdev, plat_dat);
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return ret;
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}
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static const struct of_device_id lpc18xx_dwmac_match[] = {
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{ .compatible = "nxp,lpc1850-dwmac" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match);
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static struct platform_driver lpc18xx_dwmac_driver = {
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.probe = lpc18xx_dwmac_probe,
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.remove = stmmac_pltfr_remove,
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.driver = {
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.name = "lpc18xx-dwmac",
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = lpc18xx_dwmac_match,
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},
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};
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module_platform_driver(lpc18xx_dwmac_driver);
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MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
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MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet");
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MODULE_LICENSE("GPL v2");
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