LXR linux/drivers/net/ethernet/stmicro/stmmac/dwmac-meson.c

   1/*
   2 * Amlogic Meson6 and Meson8 DWMAC glue layer
   3 *
   4 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 * You should have received a copy of the GNU General Public License
  11 * along with this program. If not, see <http://www.gnu.org/licenses/>.
  12 */
  13
  14#include <linux/device.h>
  15#include <linux/ethtool.h>
  16#include <linux/io.h>
  17#include <linux/ioport.h>
  18#include <linux/module.h>
  19#include <linux/platform_device.h>
  20#include <linux/stmmac.h>
  21
  22#include "stmmac_platform.h"
  23
  24#define ETHMAC_SPEED_100        BIT(1)
  25
  26struct meson_dwmac {
  27        struct device   *dev;
  28        void __iomem    *reg;
  29};
  30
  31static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
  32{
  33        struct meson_dwmac *dwmac = priv;
  34        unsigned int val;
  35
  36        val = readl(dwmac->reg);
  37
  38        switch (speed) {
  39        case SPEED_10:
  40                val &= ~ETHMAC_SPEED_100;
  41                break;
  42        case SPEED_100:
  43                val |= ETHMAC_SPEED_100;
  44                break;
  45        }
  46
  47        writel(val, dwmac->reg);
  48}
  49
  50static int meson6_dwmac_probe(struct platform_device *pdev)
  51{
  52        struct plat_stmmacenet_data *plat_dat;
  53        struct stmmac_resources stmmac_res;
  54        struct meson_dwmac *dwmac;
  55        struct resource *res;
  56        int ret;
  57
  58        ret = stmmac_get_platform_resources(pdev, &stmmac_res);
  59        if (ret)
  60                return ret;
  61
  62        plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
  63        if (IS_ERR(plat_dat))
  64                return PTR_ERR(plat_dat);
  65
  66        dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
  67        if (!dwmac) {
  68                ret = -ENOMEM;
  69                goto err_remove_config_dt;
  70        }
  71
  72        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  73        dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
  74        if (IS_ERR(dwmac->reg)) {
  75                ret = PTR_ERR(dwmac->reg);
  76                goto err_remove_config_dt;
  77        }
  78
  79        plat_dat->bsp_priv = dwmac;
  80        plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;
  81
  82        ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
  83        if (ret)
  84                goto err_remove_config_dt;
  85
  86        return 0;
  87
  88err_remove_config_dt:
  89        stmmac_remove_config_dt(pdev, plat_dat);
  90
  91        return ret;
  92}
  93
  94static const struct of_device_id meson6_dwmac_match[] = {
  95        { .compatible = "amlogic,meson6-dwmac" },
  96        { }
  97};
  98MODULE_DEVICE_TABLE(of, meson6_dwmac_match);
  99
 100static struct platform_driver meson6_dwmac_driver = {
 101        .probe  = meson6_dwmac_probe,
 102        .remove = stmmac_pltfr_remove,
 103        .driver = {
 104                .name           = "meson6-dwmac",
 105                .pm             = &stmmac_pltfr_pm_ops,
 106                .of_match_table = meson6_dwmac_match,
 107        },
 108};
 109module_platform_driver(meson6_dwmac_driver);
 110
 111MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
 112MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
 113MODULE_LICENSE("GPL v2");
 114