| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright (c) 2018-2019 MediaTek Inc. |
| |
| /* A library for MediaTek SGMII circuit |
| * |
| * Author: Sean Wang <sean.wang@mediatek.com> |
| * |
| */ |
| |
| #include <linux/mfd/syscon.h> |
| #include <linux/of.h> |
| #include <linux/regmap.h> |
| |
| #include "mtk_eth_soc.h" |
| |
| int mtk_sgmii_init(struct mtk_sgmii *ss, struct device_node *r, u32 ana_rgc3) |
| { |
| struct device_node *np; |
| int i; |
| |
| ss->ana_rgc3 = ana_rgc3; |
| |
| for (i = 0; i < MTK_MAX_DEVS; i++) { |
| np = of_parse_phandle(r, "mediatek,sgmiisys", i); |
| if (!np) |
| break; |
| |
| ss->regmap[i] = syscon_node_to_regmap(np); |
| of_node_put(np); |
| if (IS_ERR(ss->regmap[i])) |
| return PTR_ERR(ss->regmap[i]); |
| } |
| |
| return 0; |
| } |
| |
| /* For SGMII interface mode */ |
| int mtk_sgmii_setup_mode_an(struct mtk_sgmii *ss, int id) |
| { |
| unsigned int val; |
| |
| if (!ss->regmap[id]) |
| return -EINVAL; |
| |
| /* Setup the link timer and QPHY power up inside SGMIISYS */ |
| regmap_write(ss->regmap[id], SGMSYS_PCS_LINK_TIMER, |
| SGMII_LINK_TIMER_DEFAULT); |
| |
| regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val); |
| val |= SGMII_REMOTE_FAULT_DIS; |
| regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val); |
| |
| regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val); |
| val |= SGMII_AN_RESTART; |
| regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val); |
| |
| regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val); |
| val &= ~SGMII_PHYA_PWD; |
| regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val); |
| |
| return 0; |
| } |
| |
| /* For 1000BASE-X and 2500BASE-X interface modes, which operate at a |
| * fixed speed. |
| */ |
| int mtk_sgmii_setup_mode_force(struct mtk_sgmii *ss, int id, |
| phy_interface_t interface) |
| { |
| unsigned int val; |
| |
| if (!ss->regmap[id]) |
| return -EINVAL; |
| |
| regmap_read(ss->regmap[id], ss->ana_rgc3, &val); |
| val &= ~RG_PHY_SPEED_MASK; |
| if (interface == PHY_INTERFACE_MODE_2500BASEX) |
| val |= RG_PHY_SPEED_3_125G; |
| regmap_write(ss->regmap[id], ss->ana_rgc3, val); |
| |
| /* Disable SGMII AN */ |
| regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val); |
| val &= ~SGMII_AN_ENABLE; |
| regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val); |
| |
| /* Set the speed etc but leave the duplex unchanged */ |
| regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val); |
| val &= SGMII_DUPLEX_FULL | ~SGMII_IF_MODE_MASK; |
| val |= SGMII_SPEED_1000; |
| regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val); |
| |
| /* Release PHYA power down state */ |
| regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val); |
| val &= ~SGMII_PHYA_PWD; |
| regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val); |
| |
| return 0; |
| } |
| |
| /* For 1000BASE-X and 2500BASE-X interface modes */ |
| void mtk_sgmii_link_up(struct mtk_sgmii *ss, int id, int speed, int duplex) |
| { |
| unsigned int val; |
| |
| /* SGMII force duplex setting */ |
| regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val); |
| val &= ~SGMII_DUPLEX_FULL; |
| if (duplex == DUPLEX_FULL) |
| val |= SGMII_DUPLEX_FULL; |
| |
| regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val); |
| } |
| |
| void mtk_sgmii_restart_an(struct mtk_eth *eth, int mac_id) |
| { |
| struct mtk_sgmii *ss = eth->sgmii; |
| unsigned int val, sid; |
| |
| /* Decide how GMAC and SGMIISYS be mapped */ |
| sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ? |
| 0 : mac_id; |
| |
| if (!ss->regmap[sid]) |
| return; |
| |
| regmap_read(ss->regmap[sid], SGMSYS_PCS_CONTROL_1, &val); |
| val |= SGMII_AN_RESTART; |
| regmap_write(ss->regmap[sid], SGMSYS_PCS_CONTROL_1, val); |
| } |