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net: ethernet: mediatek: Extend SGMII related functions

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Add SGMII related logic into a separate file, and also provides options for
forcing 1G, 2.5, AN mode for the target PHY, that can be determined from
SGMII node in DTS.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sean Wang
2019-06-01 08:03:12 +08:00
committed by David S. Miller
parent 3277fc683a
commit 9ffee4a827
4 changed files with 184 additions and 37 deletions
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105
drivers/net/ethernet/mediatek/mtk_sgmii.c Normal file
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// 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;
const char *str;
int i, err;
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);
if (IS_ERR(ss->regmap[i]))
return PTR_ERR(ss->regmap[i]);
err = of_property_read_string(np, "mediatek,physpeed", &str);
if (err)
return err;
if (!strcmp(str, "2500"))
ss->flags[i] |= MTK_SGMII_PHYSPEED_2500;
else if (!strcmp(str, "1000"))
ss->flags[i] |= MTK_SGMII_PHYSPEED_1000;
else if (!strcmp(str, "auto"))
ss->flags[i] |= MTK_SGMII_PHYSPEED_AN;
else
return -EINVAL;
}
return 0;
}
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;
}
int mtk_sgmii_setup_mode_force(struct mtk_sgmii *ss, int id)
{
unsigned int val;
int mode;
if (!ss->regmap[id])
return -EINVAL;
regmap_read(ss->regmap[id], ss->ana_rgc3, &val);
val &= ~GENMASK(2, 3);
mode = ss->flags[id] & MTK_SGMII_PHYSPEED_MASK;
val |= (mode == MTK_SGMII_PHYSPEED_1000) ? 0 : BIT(2);
regmap_write(ss->regmap[id], ss->ana_rgc3, val);
/* Disable SGMII AN */
regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val);
val &= ~BIT(12);
regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val);
/* SGMII force mode setting */
val = 0x31120019;
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;
}