dwmac_socfpga.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Marek Vasut <marex@denx.de>
*
* Altera SoCFPGA EMAC extras
*/
#include <common.h>
#include <asm/io.h>
#include <dm.h>
#include <clk.h>
#include <phy.h>
#include <regmap.h>
#include <reset.h>
#include <syscon.h>
#include "designware.h"
#include <dm/device_compat.h>
#include <linux/err.h>
#include <asm/arch/system_manager.h>
struct dwmac_socfpga_platdata {
struct dw_eth_pdata dw_eth_pdata;
void *phy_intf;
u32 reg_shift;
};
static int dwmac_socfpga_ofdata_to_platdata(struct udevice *dev)
{
struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
struct regmap *regmap;
struct ofnode_phandle_args args;
void *range;
int ret;
ret = dev_read_phandle_with_args(dev, "altr,sysmgr-syscon", NULL,
2, 0, &args);
if (ret) {
dev_err(dev, "Failed to get syscon: %d\n", ret);
return ret;
}
if (args.args_count != 2) {
dev_err(dev, "Invalid number of syscon args\n");
return -EINVAL;
}
regmap = syscon_node_to_regmap(args.node);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(dev, "Failed to get regmap: %d\n", ret);
return ret;
}
range = regmap_get_range(regmap, 0);
if (!range) {
dev_err(dev, "Failed to get regmap range\n");
return -ENOMEM;
}
pdata->phy_intf = range + args.args[0];
pdata->reg_shift = args.args[1];
return designware_eth_ofdata_to_platdata(dev);
}
static int dwmac_socfpga_probe(struct udevice *dev)
{
struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
struct eth_pdata *edata = &pdata->dw_eth_pdata.eth_pdata;
struct reset_ctl_bulk reset_bulk;
int ret;
u32 modereg;
u32 modemask;
switch (edata->phy_interface) {
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
break;
case PHY_INTERFACE_MODE_RMII:
modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII;
break;
case PHY_INTERFACE_MODE_RGMII:
modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
break;
default:
dev_err(dev, "Unsupported PHY mode\n");
return -EINVAL;
}
ret = reset_get_bulk(dev, &reset_bulk);
if (ret) {
dev_err(dev, "Failed to get reset: %d\n", ret);
return ret;
}
reset_assert_bulk(&reset_bulk);
modemask = SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << pdata->reg_shift;
clrsetbits_le32(pdata->phy_intf, modemask,
modereg << pdata->reg_shift);
reset_release_bulk(&reset_bulk);
return designware_eth_probe(dev);
}
static const struct udevice_id dwmac_socfpga_ids[] = {
{ .compatible = "altr,socfpga-stmmac" },
{ }
};
U_BOOT_DRIVER(dwmac_socfpga) = {
.name = "dwmac_socfpga",
.id = UCLASS_ETH,
.of_match = dwmac_socfpga_ids,
.ofdata_to_platdata = dwmac_socfpga_ofdata_to_platdata,
.probe = dwmac_socfpga_probe,
.ops = &designware_eth_ops,
.priv_auto_alloc_size = sizeof(struct dw_eth_dev),
.platdata_auto_alloc_size = sizeof(struct dwmac_socfpga_platdata),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};