| /* |
| * 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 0x7 |
| # define LPC18XX_CREG_CREG6_ETHMODE_MII 0x0 |
| # define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x4 |
| |
| struct lpc18xx_dwmac_priv_data { |
| struct regmap *reg; |
| int interface; |
| }; |
| |
| static void *lpc18xx_dwmac_setup(struct platform_device *pdev) |
| { |
| struct lpc18xx_dwmac_priv_data *dwmac; |
| |
| dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL); |
| if (!dwmac) |
| return ERR_PTR(-ENOMEM); |
| |
| dwmac->interface = of_get_phy_mode(pdev->dev.of_node); |
| if (dwmac->interface < 0) |
| return ERR_PTR(dwmac->interface); |
| |
| dwmac->reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg"); |
| if (IS_ERR(dwmac->reg)) { |
| dev_err(&pdev->dev, "Syscon lookup failed\n"); |
| return dwmac->reg; |
| } |
| |
| return dwmac; |
| } |
| |
| static int lpc18xx_dwmac_init(struct platform_device *pdev, void *priv) |
| { |
| struct lpc18xx_dwmac_priv_data *dwmac = priv; |
| u8 ethmode; |
| |
| if (dwmac->interface == PHY_INTERFACE_MODE_MII) { |
| ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII; |
| } else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) { |
| ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII; |
| } else { |
| dev_err(&pdev->dev, "Only MII and RMII mode supported\n"); |
| return -EINVAL; |
| } |
| |
| regmap_update_bits(dwmac->reg, LPC18XX_CREG_CREG6, |
| LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode); |
| |
| return 0; |
| } |
| |
| static const struct stmmac_of_data lpc18xx_dwmac_data = { |
| .has_gmac = 1, |
| .setup = lpc18xx_dwmac_setup, |
| .init = lpc18xx_dwmac_init, |
| }; |
| |
| static const struct of_device_id lpc18xx_dwmac_match[] = { |
| { .compatible = "nxp,lpc1850-dwmac", .data = &lpc18xx_dwmac_data }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match); |
| |
| static struct platform_driver lpc18xx_dwmac_driver = { |
| .probe = stmmac_pltfr_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"); |