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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018-2019 MediaTek Inc.
/* A library for configuring path from GMAC/GDM to target PHY
*
* Author: Sean Wang <sean.wang@mediatek.com>
*
*/
#include <linux/phy.h>
#include <linux/regmap.h>
#include "mtk_eth_soc.h"
struct mtk_eth_muxc {
const char *name;
int cap_bit;
int (*set_path)(struct mtk_eth *eth, int path);
};
static const char *mtk_eth_path_name(int path)
{
switch (path) {
case MTK_ETH_PATH_GMAC1_RGMII:
return "gmac1_rgmii";
case MTK_ETH_PATH_GMAC1_TRGMII:
return "gmac1_trgmii";
case MTK_ETH_PATH_GMAC1_SGMII:
return "gmac1_sgmii";
case MTK_ETH_PATH_GMAC2_RGMII:
return "gmac2_rgmii";
case MTK_ETH_PATH_GMAC2_SGMII:
return "gmac2_sgmii";
case MTK_ETH_PATH_GMAC2_GEPHY:
return "gmac2_gephy";
case MTK_ETH_PATH_GDM1_ESW:
return "gdm1_esw";
default:
return "unknown path";
}
}
static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, int path)
{
bool updated = true;
u32 val, mask, set;
switch (path) {
case MTK_ETH_PATH_GMAC1_SGMII:
mask = ~(u32)MTK_MUX_TO_ESW;
set = 0;
break;
case MTK_ETH_PATH_GDM1_ESW:
mask = ~(u32)MTK_MUX_TO_ESW;
set = MTK_MUX_TO_ESW;
break;
default:
updated = false;
break;
}
if (updated) {
val = mtk_r32(eth, MTK_MAC_MISC);
val = (val & mask) | set;
mtk_w32(eth, val, MTK_MAC_MISC);
}
dev_dbg(eth->dev, "path %s in %s updated = %d\n",
mtk_eth_path_name(path), __func__, updated);
return 0;
}
static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, int path)
{
unsigned int val = 0;
bool updated = true;
switch (path) {
case MTK_ETH_PATH_GMAC2_GEPHY:
val = ~(u32)GEPHY_MAC_SEL;
break;
default:
updated = false;
break;
}
if (updated)
regmap_update_bits(eth->infra, INFRA_MISC2, GEPHY_MAC_SEL, val);
dev_dbg(eth->dev, "path %s in %s updated = %d\n",
mtk_eth_path_name(path), __func__, updated);
return 0;
}
static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path)
{
unsigned int val = 0;
bool updated = true;
switch (path) {
case MTK_ETH_PATH_GMAC2_SGMII:
val = CO_QPHY_SEL;
break;
default:
updated = false;
break;
}
if (updated)
regmap_update_bits(eth->infra, INFRA_MISC2, CO_QPHY_SEL, val);
dev_dbg(eth->dev, "path %s in %s updated = %d\n",
mtk_eth_path_name(path), __func__, updated);
return 0;
}
static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, int path)
{
unsigned int val = 0;
bool updated = true;
switch (path) {
case MTK_ETH_PATH_GMAC1_SGMII:
val = SYSCFG0_SGMII_GMAC1;
break;
case MTK_ETH_PATH_GMAC2_SGMII:
val = SYSCFG0_SGMII_GMAC2;
break;
case MTK_ETH_PATH_GMAC1_RGMII:
case MTK_ETH_PATH_GMAC2_RGMII:
regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
val &= SYSCFG0_SGMII_MASK;
if ((path == MTK_GMAC1_RGMII && val == SYSCFG0_SGMII_GMAC1) ||
(path == MTK_GMAC2_RGMII && val == SYSCFG0_SGMII_GMAC2))
val = 0;
else
updated = false;
break;
default:
updated = false;
break;
}
if (updated)
regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
SYSCFG0_SGMII_MASK, val);
dev_dbg(eth->dev, "path %s in %s updated = %d\n",
mtk_eth_path_name(path), __func__, updated);
return 0;
}
static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, int path)
{
unsigned int val = 0;
bool updated = true;
regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
switch (path) {
case MTK_ETH_PATH_GMAC1_SGMII:
val |= SYSCFG0_SGMII_GMAC1_V2;
break;
case MTK_ETH_PATH_GMAC2_GEPHY:
val &= ~(u32)SYSCFG0_SGMII_GMAC2_V2;
break;
case MTK_ETH_PATH_GMAC2_SGMII:
val |= SYSCFG0_SGMII_GMAC2_V2;
break;
default:
updated = false;
}
if (updated)
regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
SYSCFG0_SGMII_MASK, val);
dev_dbg(eth->dev, "path %s in %s updated = %d\n",
mtk_eth_path_name(path), __func__, updated);
return 0;
}
static const struct mtk_eth_muxc mtk_eth_muxc[] = {
{
.name = "mux_gdm1_to_gmac1_esw",
.cap_bit = MTK_ETH_MUX_GDM1_TO_GMAC1_ESW,
.set_path = set_mux_gdm1_to_gmac1_esw,
}, {
.name = "mux_gmac2_gmac0_to_gephy",
.cap_bit = MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY,
.set_path = set_mux_gmac2_gmac0_to_gephy,
}, {
.name = "mux_u3_gmac2_to_qphy",
.cap_bit = MTK_ETH_MUX_U3_GMAC2_TO_QPHY,
.set_path = set_mux_u3_gmac2_to_qphy,
}, {
.name = "mux_gmac1_gmac2_to_sgmii_rgmii",
.cap_bit = MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII,
.set_path = set_mux_gmac1_gmac2_to_sgmii_rgmii,
}, {
.name = "mux_gmac12_to_gephy_sgmii",
.cap_bit = MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII,
.set_path = set_mux_gmac12_to_gephy_sgmii,
},
};
static int mtk_eth_mux_setup(struct mtk_eth *eth, int path)
{
int i, err = 0;
if (!MTK_HAS_CAPS(eth->soc->caps, path)) {
dev_err(eth->dev, "path %s isn't support on the SoC\n",
mtk_eth_path_name(path));
return -EINVAL;
}
if (!MTK_HAS_CAPS(eth->soc->caps, MTK_MUX))
return 0;
/* Setup MUX in path fabric */
for (i = 0; i < ARRAY_SIZE(mtk_eth_muxc); i++) {
if (MTK_HAS_CAPS(eth->soc->caps, mtk_eth_muxc[i].cap_bit)) {
err = mtk_eth_muxc[i].set_path(eth, path);
if (err)
goto out;
} else {
dev_dbg(eth->dev, "mux %s isn't present on the SoC\n",
mtk_eth_muxc[i].name);
}
}
out:
return err;
}
int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
{
int path;
path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_SGMII :
MTK_ETH_PATH_GMAC2_SGMII;
/* Setup proper MUXes along the path */
return mtk_eth_mux_setup(eth, path);
}
int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id)
{
int path = 0;
if (mac_id == 1)
path = MTK_ETH_PATH_GMAC2_GEPHY;
if (!path)
return -EINVAL;
/* Setup proper MUXes along the path */
return mtk_eth_mux_setup(eth, path);
}
int mtk_gmac_rgmii_path_setup(struct mtk_eth *eth, int mac_id)
{
int path;
path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_RGMII :
MTK_ETH_PATH_GMAC2_RGMII;
/* Setup proper MUXes along the path */
return mtk_eth_mux_setup(eth, path);
}
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