127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018-2019 MediaTek Inc.
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/* A library for MediaTek SGMII circuit
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*
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* Author: Sean Wang <sean.wang@mediatek.com>
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*
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include "mtk_eth_soc.h"
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int mtk_sgmii_init(struct mtk_sgmii *ss, struct device_node *r, u32 ana_rgc3)
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{
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struct device_node *np;
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int i;
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ss->ana_rgc3 = ana_rgc3;
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for (i = 0; i < MTK_MAX_DEVS; i++) {
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np = of_parse_phandle(r, "mediatek,sgmiisys", i);
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if (!np)
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break;
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ss->regmap[i] = syscon_node_to_regmap(np);
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if (IS_ERR(ss->regmap[i]))
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return PTR_ERR(ss->regmap[i]);
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}
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return 0;
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}
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int mtk_sgmii_setup_mode_an(struct mtk_sgmii *ss, int id)
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{
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unsigned int val;
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if (!ss->regmap[id])
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return -EINVAL;
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/* Setup the link timer and QPHY power up inside SGMIISYS */
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regmap_write(ss->regmap[id], SGMSYS_PCS_LINK_TIMER,
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SGMII_LINK_TIMER_DEFAULT);
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regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val);
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val |= SGMII_REMOTE_FAULT_DIS;
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regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val);
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regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val);
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val |= SGMII_AN_RESTART;
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regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val);
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regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val);
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val &= ~SGMII_PHYA_PWD;
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regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val);
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return 0;
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}
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int mtk_sgmii_setup_mode_force(struct mtk_sgmii *ss, int id,
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const struct phylink_link_state *state)
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{
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unsigned int val;
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if (!ss->regmap[id])
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return -EINVAL;
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regmap_read(ss->regmap[id], ss->ana_rgc3, &val);
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val &= ~RG_PHY_SPEED_MASK;
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if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
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val |= RG_PHY_SPEED_3_125G;
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regmap_write(ss->regmap[id], ss->ana_rgc3, val);
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/* Disable SGMII AN */
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regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val);
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val &= ~SGMII_AN_ENABLE;
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regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val);
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/* SGMII force mode setting */
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regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val);
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val &= ~SGMII_IF_MODE_MASK;
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switch (state->speed) {
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case SPEED_10:
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val |= SGMII_SPEED_10;
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break;
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case SPEED_100:
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val |= SGMII_SPEED_100;
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break;
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case SPEED_2500:
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case SPEED_1000:
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val |= SGMII_SPEED_1000;
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break;
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}
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if (state->duplex == DUPLEX_FULL)
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val |= SGMII_DUPLEX_FULL;
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regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val);
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/* Release PHYA power down state */
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regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val);
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val &= ~SGMII_PHYA_PWD;
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regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val);
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return 0;
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}
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void mtk_sgmii_restart_an(struct mtk_eth *eth, int mac_id)
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{
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struct mtk_sgmii *ss = eth->sgmii;
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unsigned int val, sid;
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/* Decide how GMAC and SGMIISYS be mapped */
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sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ?
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0 : mac_id;
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if (!ss->regmap[sid])
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return;
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regmap_read(ss->regmap[sid], SGMSYS_PCS_CONTROL_1, &val);
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val |= SGMII_AN_RESTART;
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regmap_write(ss->regmap[sid], SGMSYS_PCS_CONTROL_1, val);
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}
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