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/*
* DWMAC glue for NXP LPC18xx/LPC43xx Ethernet
*
* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/stmmac.h>
#include "stmmac_platform.h"
/* Register defines for CREG syscon */
#define LPC18XX_CREG_CREG6 0x12c
# define LPC18XX_CREG_CREG6_ETHMODE_MASK GENMASK(2, 0)
static int lpc18xx_set_phy_intf_sel(void *bsp_priv, u8 phy_intf_sel)
{
struct regmap *reg = bsp_priv;
if (phy_intf_sel != PHY_INTF_SEL_GMII_MII &&
phy_intf_sel != PHY_INTF_SEL_RMII)
return -EINVAL;
regmap_update_bits(reg, LPC18XX_CREG_CREG6,
LPC18XX_CREG_CREG6_ETHMODE_MASK,
FIELD_PREP(LPC18XX_CREG_CREG6_ETHMODE_MASK,
phy_intf_sel));
return 0;
}
static int lpc18xx_dwmac_probe(struct platform_device *pdev)
{
struct plat_stmmacenet_data *plat_dat;
struct stmmac_resources stmmac_res;
struct regmap *regmap;
int ret;
ret = stmmac_get_platform_resources(pdev, &stmmac_res);
if (ret)
return ret;
plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
if (IS_ERR(plat_dat))
return PTR_ERR(plat_dat);
plat_dat->core_type = DWMAC_CORE_GMAC;
regmap = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
if (IS_ERR(regmap)) {
dev_err(&pdev->dev, "syscon lookup failed\n");
return PTR_ERR(regmap);
}
plat_dat->bsp_priv = regmap;
plat_dat->set_phy_intf_sel = lpc18xx_set_phy_intf_sel;
return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
}
static const struct of_device_id lpc18xx_dwmac_match[] = {
{ .compatible = "nxp,lpc1850-dwmac" },
{ }
};
MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match);
static struct platform_driver lpc18xx_dwmac_driver = {
.probe = lpc18xx_dwmac_probe,
.remove = stmmac_pltfr_remove,
.driver = {
.name = "lpc18xx-dwmac",
.pm = &stmmac_pltfr_pm_ops,
.of_match_table = lpc18xx_dwmac_match,
},
};
module_platform_driver(lpc18xx_dwmac_driver);
MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet");
MODULE_LICENSE("GPL v2");
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