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// SPDX-License-Identifier: GPL-2.0+
#include <linux/bitfield.h>
#include <linux/module.h>
#include <linux/phy.h>
#define MTK_EXT_PAGE_ACCESS 0x1f
#define MTK_PHY_PAGE_STANDARD 0x0000
#define MTK_PHY_PAGE_EXTENDED 0x0001
#define MTK_PHY_PAGE_EXTENDED_2 0x0002
#define MTK_PHY_PAGE_EXTENDED_3 0x0003
#define MTK_PHY_PAGE_EXTENDED_2A30 0x2a30
#define MTK_PHY_PAGE_EXTENDED_52B5 0x52b5
static int mtk_gephy_read_page(struct phy_device *phydev)
{
return __phy_read(phydev, MTK_EXT_PAGE_ACCESS);
}
static int mtk_gephy_write_page(struct phy_device *phydev, int page)
{
return __phy_write(phydev, MTK_EXT_PAGE_ACCESS, page);
}
static void mtk_gephy_config_init(struct phy_device *phydev)
{
/* Disable EEE */
phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
/* Enable HW auto downshift */
phy_modify_paged(phydev, MTK_PHY_PAGE_EXTENDED, 0x14, 0, BIT(4));
/* Increase SlvDPSready time */
phy_select_page(phydev, MTK_PHY_PAGE_EXTENDED_52B5);
__phy_write(phydev, 0x10, 0xafae);
__phy_write(phydev, 0x12, 0x2f);
__phy_write(phydev, 0x10, 0x8fae);
phy_restore_page(phydev, MTK_PHY_PAGE_STANDARD, 0);
/* Adjust 100_mse_threshold */
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x123, 0xffff);
/* Disable mcc */
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xa6, 0x300);
}
static int mt7530_phy_config_init(struct phy_device *phydev)
{
mtk_gephy_config_init(phydev);
/* Increase post_update_timer */
phy_write_paged(phydev, MTK_PHY_PAGE_EXTENDED_3, 0x11, 0x4b);
return 0;
}
static int mt7531_phy_config_init(struct phy_device *phydev)
{
mtk_gephy_config_init(phydev);
/* PHY link down power saving enable */
phy_set_bits(phydev, 0x17, BIT(4));
phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, 0xc6, 0x300);
/* Set TX Pair delay selection */
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x13, 0x404);
phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x14, 0x404);
return 0;
}
static struct phy_driver mtk_gephy_driver[] = {
{
PHY_ID_MATCH_EXACT(0x03a29412),
.name = "MediaTek MT7530 PHY",
.config_init = mt7530_phy_config_init,
/* Interrupts are handled by the switch, not the PHY
* itself.
*/
.config_intr = genphy_no_config_intr,
.handle_interrupt = genphy_handle_interrupt_no_ack,
.suspend = genphy_suspend,
.resume = genphy_resume,
.read_page = mtk_gephy_read_page,
.write_page = mtk_gephy_write_page,
},
{
PHY_ID_MATCH_EXACT(0x03a29441),
.name = "MediaTek MT7531 PHY",
.config_init = mt7531_phy_config_init,
/* Interrupts are handled by the switch, not the PHY
* itself.
*/
.config_intr = genphy_no_config_intr,
.handle_interrupt = genphy_handle_interrupt_no_ack,
.suspend = genphy_suspend,
.resume = genphy_resume,
.read_page = mtk_gephy_read_page,
.write_page = mtk_gephy_write_page,
},
};
module_phy_driver(mtk_gephy_driver);
static struct mdio_device_id __maybe_unused mtk_gephy_tbl[] = {
{ PHY_ID_MATCH_VENDOR(0x03a29400) },
{ }
};
MODULE_DESCRIPTION("MediaTek Gigabit Ethernet PHY driver");
MODULE_AUTHOR("DENG, Qingfang <dqfext@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(mdio, mtk_gephy_tbl);
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