1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for MT7628 Embedded Switch internal Fast Ethernet PHYs 4 */ 5 #include <linux/module.h> 6 #include <linux/phy.h> 7 8 #define MTK_FPHY_ID_MT7628 0x03a29410 9 #define MTK_EXT_PAGE_ACCESS 0x1f 10 11 static int mt7628_phy_read_page(struct phy_device *phydev) 12 { 13 return __phy_read(phydev, MTK_EXT_PAGE_ACCESS); 14 } 15 16 static int mt7628_phy_write_page(struct phy_device *phydev, int page) 17 { 18 return __phy_write(phydev, MTK_EXT_PAGE_ACCESS, page); 19 } 20 21 static int mt7628_phy_config_init(struct phy_device *phydev) 22 { 23 /* 24 * This undocumented bit is required for the PHYs to be able to 25 * establish 100mbps links. 26 */ 27 return phy_modify_paged(phydev, 0x8000, 30, BIT(13), BIT(13)); 28 } 29 30 static struct phy_driver mtk_soc_fe_phy_driver[] = { 31 { 32 PHY_ID_MATCH_EXACT(MTK_FPHY_ID_MT7628), 33 .name = "MediaTek MT7628 PHY", 34 .config_init = mt7628_phy_config_init, 35 .read_page = mt7628_phy_read_page, 36 .write_page = mt7628_phy_write_page, 37 .suspend = genphy_suspend, 38 .resume = genphy_resume, 39 }, 40 }; 41 42 module_phy_driver(mtk_soc_fe_phy_driver); 43 static const struct mdio_device_id __maybe_unused mtk_soc_fe_phy_tbl[] = { 44 { PHY_ID_MATCH_EXACT(MTK_FPHY_ID_MT7628) }, 45 { } 46 }; 47 48 MODULE_DESCRIPTION("MediaTek SoC Fast Ethernet PHY driver"); 49 MODULE_AUTHOR("Joris Vaisvila <joey@tinyisr.com>"); 50 MODULE_LICENSE("GPL"); 51 52 MODULE_DEVICE_TABLE(mdio, mtk_soc_fe_phy_tbl); 53