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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright Altera Corporation (C) 2014. All rights reserved.
*
* Adopted from dwmac-sti.c
*/
#include <linux/mfd/altera-sysmgr.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/stmmac.h>
#include "stmmac.h"
#include "stmmac_platform.h"
#include "altr_tse_pcs.h"
#define SGMII_ADAPTER_CTRL_REG 0x00
#define SGMII_ADAPTER_DISABLE 0x0001
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
#define SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000010
#define SYSMGR_GEN10_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000100
#define SYSMGR_FPGAGRP_MODULE_REG 0x00000028
#define SYSMGR_FPGAGRP_MODULE_EMAC 0x00000004
#define SYSMGR_FPGAINTF_EMAC_REG 0x00000070
#define SYSMGR_FPGAINTF_EMAC_BIT 0x1
#define EMAC_SPLITTER_CTRL_REG 0x0
#define EMAC_SPLITTER_CTRL_SPEED_MASK 0x3
#define EMAC_SPLITTER_CTRL_SPEED_10 0x2
#define EMAC_SPLITTER_CTRL_SPEED_100 0x3
#define EMAC_SPLITTER_CTRL_SPEED_1000 0x0
struct socfpga_dwmac;
struct socfpga_dwmac_ops {
int (*set_phy_mode)(struct socfpga_dwmac *dwmac_priv);
};
struct socfpga_dwmac {
u32 reg_offset;
u32 reg_shift;
struct device *dev;
struct regmap *sys_mgr_base_addr;
struct reset_control *stmmac_rst;
struct reset_control *stmmac_ocp_rst;
void __iomem *splitter_base;
bool f2h_ptp_ref_clk;
struct tse_pcs pcs;
const struct socfpga_dwmac_ops *ops;
};
static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
{
struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
void __iomem *splitter_base = dwmac->splitter_base;
void __iomem *tse_pcs_base = dwmac->pcs.tse_pcs_base;
void __iomem *sgmii_adapter_base = dwmac->pcs.sgmii_adapter_base;
struct device *dev = dwmac->dev;
struct net_device *ndev = dev_get_drvdata(dev);
struct phy_device *phy_dev = ndev->phydev;
u32 val;
if ((tse_pcs_base) && (sgmii_adapter_base))
writew(SGMII_ADAPTER_DISABLE,
sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
if (splitter_base) {
val = readl(splitter_base + EMAC_SPLITTER_CTRL_REG);
val &= ~EMAC_SPLITTER_CTRL_SPEED_MASK;
switch (speed) {
case 1000:
val |= EMAC_SPLITTER_CTRL_SPEED_1000;
break;
case 100:
val |= EMAC_SPLITTER_CTRL_SPEED_100;
break;
case 10:
val |= EMAC_SPLITTER_CTRL_SPEED_10;
break;
default:
return;
}
writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
}
if (tse_pcs_base && sgmii_adapter_base)
tse_pcs_fix_mac_speed(&dwmac->pcs, phy_dev, speed);
}
static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
{
struct device_node *np = dev->of_node;
struct regmap *sys_mgr_base_addr;
u32 reg_offset, reg_shift;
int ret, index;
struct device_node *np_splitter = NULL;
struct device_node *np_sgmii_adapter = NULL;
struct resource res_splitter;
struct resource res_tse_pcs;
struct resource res_sgmii_adapter;
sys_mgr_base_addr =
altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
if (IS_ERR(sys_mgr_base_addr)) {
dev_info(dev, "No sysmgr-syscon node found\n");
return PTR_ERR(sys_mgr_base_addr);
}
ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset);
if (ret) {
dev_info(dev, "Could not read reg_offset from sysmgr-syscon!\n");
return -EINVAL;
}
ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift);
if (ret) {
dev_info(dev, "Could not read reg_shift from sysmgr-syscon!\n");
return -EINVAL;
}
dwmac->f2h_ptp_ref_clk = of_property_read_bool(np, "altr,f2h_ptp_ref_clk");
np_splitter = of_parse_phandle(np, "altr,emac-splitter", 0);
if (np_splitter) {
ret = of_address_to_resource(np_splitter, 0, &res_splitter);
of_node_put(np_splitter);
if (ret) {
dev_info(dev, "Missing emac splitter address\n");
return -EINVAL;
}
dwmac->splitter_base = devm_ioremap_resource(dev, &res_splitter);
if (IS_ERR(dwmac->splitter_base)) {
dev_info(dev, "Failed to mapping emac splitter\n");
return PTR_ERR(dwmac->splitter_base);
}
}
np_sgmii_adapter = of_parse_phandle(np,
"altr,gmii-to-sgmii-converter", 0);
if (np_sgmii_adapter) {
index = of_property_match_string(np_sgmii_adapter, "reg-names",
"hps_emac_interface_splitter_avalon_slave");
if (index >= 0) {
if (of_address_to_resource(np_sgmii_adapter, index,
&res_splitter)) {
dev_err(dev,
"%s: ERROR: missing emac splitter address\n",
__func__);
ret = -EINVAL;
goto err_node_put;
}
dwmac->splitter_base =
devm_ioremap_resource(dev, &res_splitter);
if (IS_ERR(dwmac->splitter_base)) {
ret = PTR_ERR(dwmac->splitter_base);
goto err_node_put;
}
}
index = of_property_match_string(np_sgmii_adapter, "reg-names",
"gmii_to_sgmii_adapter_avalon_slave");
if (index >= 0) {
if (of_address_to_resource(np_sgmii_adapter, index,
&res_sgmii_adapter)) {
dev_err(dev,
"%s: ERROR: failed mapping adapter\n",
__func__);
ret = -EINVAL;
goto err_node_put;
}
dwmac->pcs.sgmii_adapter_base =
devm_ioremap_resource(dev, &res_sgmii_adapter);
if (IS_ERR(dwmac->pcs.sgmii_adapter_base)) {
ret = PTR_ERR(dwmac->pcs.sgmii_adapter_base);
goto err_node_put;
}
}
index = of_property_match_string(np_sgmii_adapter, "reg-names",
"eth_tse_control_port");
if (index >= 0) {
if (of_address_to_resource(np_sgmii_adapter, index,
&res_tse_pcs)) {
dev_err(dev,
"%s: ERROR: failed mapping tse control port\n",
__func__);
ret = -EINVAL;
goto err_node_put;
}
dwmac->pcs.tse_pcs_base =
devm_ioremap_resource(dev, &res_tse_pcs);
if (IS_ERR(dwmac->pcs.tse_pcs_base)) {
ret = PTR_ERR(dwmac->pcs.tse_pcs_base);
goto err_node_put;
}
}
}
dwmac->reg_offset = reg_offset;
dwmac->reg_shift = reg_shift;
dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
dwmac->dev = dev;
of_node_put(np_sgmii_adapter);
return 0;
err_node_put:
of_node_put(np_sgmii_adapter);
return ret;
}
static int socfpga_get_plat_phymode(struct socfpga_dwmac *dwmac)
{
struct net_device *ndev = dev_get_drvdata(dwmac->dev);
struct stmmac_priv *priv = netdev_priv(ndev);
return priv->plat->interface;
}
static int socfpga_set_phy_mode_common(int phymode, u32 *val)
{
switch (phymode) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
*val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
break;
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
case PHY_INTERFACE_MODE_SGMII:
*val = SYSMG
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