+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Oxford Semiconductor OXNAS DWMAC glue layer
- *
- * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
- * Copyright (C) 2014 Daniel Golle <daniel@makrotopia.org>
- * Copyright (C) 2013 Ma Haijun <mahaijuns@gmail.com>
- * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
- */
-
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-#include <linux/mfd/syscon.h>
-#include <linux/stmmac.h>
-
-#include "stmmac_platform.h"
-
-/* System Control regmap offsets */
-#define OXNAS_DWMAC_CTRL_REGOFFSET 0x78
-#define OXNAS_DWMAC_DELAY_REGOFFSET 0x100
-
-/* Control Register */
-#define DWMAC_CKEN_RX_IN 14
-#define DWMAC_CKEN_RXN_OUT 13
-#define DWMAC_CKEN_RX_OUT 12
-#define DWMAC_CKEN_TX_IN 10
-#define DWMAC_CKEN_TXN_OUT 9
-#define DWMAC_CKEN_TX_OUT 8
-#define DWMAC_RX_SOURCE 7
-#define DWMAC_TX_SOURCE 6
-#define DWMAC_LOW_TX_SOURCE 4
-#define DWMAC_AUTO_TX_SOURCE 3
-#define DWMAC_RGMII 2
-#define DWMAC_SIMPLE_MUX 1
-#define DWMAC_CKEN_GTX 0
-
-/* Delay register */
-#define DWMAC_TX_VARDELAY_SHIFT 0
-#define DWMAC_TXN_VARDELAY_SHIFT 8
-#define DWMAC_RX_VARDELAY_SHIFT 16
-#define DWMAC_RXN_VARDELAY_SHIFT 24
-#define DWMAC_TX_VARDELAY(d) ((d) << DWMAC_TX_VARDELAY_SHIFT)
-#define DWMAC_TXN_VARDELAY(d) ((d) << DWMAC_TXN_VARDELAY_SHIFT)
-#define DWMAC_RX_VARDELAY(d) ((d) << DWMAC_RX_VARDELAY_SHIFT)
-#define DWMAC_RXN_VARDELAY(d) ((d) << DWMAC_RXN_VARDELAY_SHIFT)
-
-struct oxnas_dwmac;
-
-struct oxnas_dwmac_data {
- int (*setup)(struct oxnas_dwmac *dwmac);
-};
-
-struct oxnas_dwmac {
- struct device *dev;
- struct clk *clk;
- struct regmap *regmap;
- const struct oxnas_dwmac_data *data;
-};
-
-static int oxnas_dwmac_setup_ox810se(struct oxnas_dwmac *dwmac)
-{
- unsigned int value;
- int ret;
-
- ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
- if (ret < 0)
- return ret;
-
- /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
- value |= BIT(DWMAC_CKEN_GTX) |
- /* Use simple mux for 25/125 Mhz clock switching */
- BIT(DWMAC_SIMPLE_MUX);
-
- regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
-
- return 0;
-}
-
-static int oxnas_dwmac_setup_ox820(struct oxnas_dwmac *dwmac)
-{
- unsigned int value;
- int ret;
-
- ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
- if (ret < 0)
- return ret;
-
- /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
- value |= BIT(DWMAC_CKEN_GTX) |
- /* Use simple mux for 25/125 Mhz clock switching */
- BIT(DWMAC_SIMPLE_MUX) |
- /* set auto switch tx clock source */
- BIT(DWMAC_AUTO_TX_SOURCE) |
- /* enable tx & rx vardelay */
- BIT(DWMAC_CKEN_TX_OUT) |
- BIT(DWMAC_CKEN_TXN_OUT) |
- BIT(DWMAC_CKEN_TX_IN) |
- BIT(DWMAC_CKEN_RX_OUT) |
- BIT(DWMAC_CKEN_RXN_OUT) |
- BIT(DWMAC_CKEN_RX_IN);
- regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
-
- /* set tx & rx vardelay */
- value = DWMAC_TX_VARDELAY(4) |
- DWMAC_TXN_VARDELAY(2) |
- DWMAC_RX_VARDELAY(10) |
- DWMAC_RXN_VARDELAY(8);
- regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
-
- return 0;
-}
-
-static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
-{
- struct oxnas_dwmac *dwmac = priv;
- int ret;
-
- /* Reset HW here before changing the glue configuration */
- ret = device_reset(dwmac->dev);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(dwmac->clk);
- if (ret)
- return ret;
-
- ret = dwmac->data->setup(dwmac);
- if (ret)
- clk_disable_unprepare(dwmac->clk);
-
- return ret;
-}
-
-static void oxnas_dwmac_exit(struct platform_device *pdev, void *priv)
-{
- struct oxnas_dwmac *dwmac = priv;
-
- clk_disable_unprepare(dwmac->clk);
-}
-
-static int oxnas_dwmac_probe(struct platform_device *pdev)
-{
- struct plat_stmmacenet_data *plat_dat;
- struct stmmac_resources stmmac_res;
- struct oxnas_dwmac *dwmac;
- int ret;
-
- ret = stmmac_get_platform_resources(pdev, &stmmac_res);
- if (ret)
- return ret;
-
- plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
- if (IS_ERR(plat_dat))
- return PTR_ERR(plat_dat);
-
- dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
- if (!dwmac) {
- ret = -ENOMEM;
- goto err_remove_config_dt;
- }
-
- dwmac->data = (const struct oxnas_dwmac_data *)of_device_get_match_data(&pdev->dev);
- if (!dwmac->data) {
- ret = -EINVAL;
- goto err_remove_config_dt;
- }
-
- dwmac->dev = &pdev->dev;
- plat_dat->bsp_priv = dwmac;
- plat_dat->init = oxnas_dwmac_init;
- plat_dat->exit = oxnas_dwmac_exit;
-
- dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
- "oxsemi,sys-ctrl");
- if (IS_ERR(dwmac->regmap)) {
- dev_err(&pdev->dev, "failed to have sysctrl regmap\n");
- ret = PTR_ERR(dwmac->regmap);
- goto err_remove_config_dt;
- }
-
- dwmac->clk = devm_clk_get(&pdev->dev, "gmac");
- if (IS_ERR(dwmac->clk)) {
- ret = PTR_ERR(dwmac->clk);
- goto err_remove_config_dt;
- }
-
- ret = oxnas_dwmac_init(pdev, plat_dat->bsp_priv);
- if (ret)
- goto err_remove_config_dt;
-
- ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
- if (ret)
- goto err_dwmac_exit;
-
-
- return 0;
-
-err_dwmac_exit:
- oxnas_dwmac_exit(pdev, plat_dat->bsp_priv);
-err_remove_config_dt:
- stmmac_remove_config_dt(pdev, plat_dat);
-
- return ret;
-}
-
-static const struct oxnas_dwmac_data ox810se_dwmac_data = {
- .setup = oxnas_dwmac_setup_ox810se,
-};
-
-static const struct oxnas_dwmac_data ox820_dwmac_data = {
- .setup = oxnas_dwmac_setup_ox820,
-};
-
-static const struct of_device_id oxnas_dwmac_match[] = {
- {
- .compatible = "oxsemi,ox810se-dwmac",
- .data = &ox810se_dwmac_data,
- },
- {
- .compatible = "oxsemi,ox820-dwmac",
- .data = &ox820_dwmac_data,
- },
- { }
-};
-MODULE_DEVICE_TABLE(of, oxnas_dwmac_match);
-
-static struct platform_driver oxnas_dwmac_driver = {
- .probe = oxnas_dwmac_probe,
- .remove_new = stmmac_pltfr_remove,
- .driver = {
- .name = "oxnas-dwmac",
- .pm = &stmmac_pltfr_pm_ops,
- .of_match_table = oxnas_dwmac_match,
- },
-};
-module_platform_driver(oxnas_dwmac_driver);
-
-MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
-MODULE_DESCRIPTION("Oxford Semiconductor OXNAS DWMAC glue layer");
-MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff