drivers/net/phy/mediatek-ge.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 #include <linux/bitfield.h>
   3 #include <linux/module.h>
   4 #include <linux/phy.h>
   5
   6 #define MTK_EXT_PAGE_ACCESS             0x1f
   7 #define MTK_PHY_PAGE_STANDARD           0x0000
   8 #define MTK_PHY_PAGE_EXTENDED           0x0001
   9 #define MTK_PHY_PAGE_EXTENDED_2         0x0002
  10 #define MTK_PHY_PAGE_EXTENDED_3         0x0003
  11 #define MTK_PHY_PAGE_EXTENDED_2A30      0x2a30
  12 #define MTK_PHY_PAGE_EXTENDED_52B5      0x52b5
  13
  14 static int mtk_gephy_read_page(struct phy_device *phydev)
  15 {
  16         return __phy_read(phydev, MTK_EXT_PAGE_ACCESS);
  17 }
  18
  19 static int mtk_gephy_write_page(struct phy_device *phydev, int page)
  20 {
  21         return __phy_write(phydev, MTK_EXT_PAGE_ACCESS, page);
  22 }
  23
  24 static void mtk_gephy_config_init(struct phy_device *phydev)
  25 {
  26         /* Disable EEE */
  27         phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
  28
  29         /* Enable HW auto downshift */
  30         phy_modify_paged(phydev, MTK_PHY_PAGE_EXTENDED, 0x14, 0, BIT(4));
  31
  32         /* Increase SlvDPSready time */
  33         phy_select_page(phydev, MTK_PHY_PAGE_EXTENDED_52B5);
  34         __phy_write(phydev, 0x10, 0xafae);
  35         __phy_write(phydev, 0x12, 0x2f);
  36         __phy_write(phydev, 0x10, 0x8fae);
  37         phy_restore_page(phydev, MTK_PHY_PAGE_STANDARD, 0);
  38
  39         /* Adjust 100_mse_threshold */
  40         phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x123, 0xffff);
  41
  42         /* Disable mcc */
  43         phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xa6, 0x300);
  44 }
  45
  46 static int mt7530_phy_config_init(struct phy_device *phydev)
  47 {
  48         mtk_gephy_config_init(phydev);
  49
  50         /* Increase post_update_timer */
  51         phy_write_paged(phydev, MTK_PHY_PAGE_EXTENDED_3, 0x11, 0x4b);
  52
  53         return 0;
  54 }
  55
  56 static int mt7531_phy_config_init(struct phy_device *phydev)
  57 {
  58         if (phydev->interface != PHY_INTERFACE_MODE_INTERNAL)
  59                 return -EINVAL;
  60
  61         mtk_gephy_config_init(phydev);
  62
  63         /* PHY link down power saving enable */
  64         phy_set_bits(phydev, 0x17, BIT(4));
  65         phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, 0xc6, 0x300);
  66
  67         /* Set TX Pair delay selection */
  68         phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x13, 0x404);
  69         phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x14, 0x404);
  70
  71         return 0;
  72 }
  73
  74 static struct phy_driver mtk_gephy_driver[] = {
  75         {
  76                 PHY_ID_MATCH_EXACT(0x03a29412),
  77                 .name           = "MediaTek MT7530 PHY",
  78                 .config_init    = mt7530_phy_config_init,
  79                 /* Interrupts are handled by the switch, not the PHY
  80                  * itself.
  81                  */
  82                 .config_intr    = genphy_no_config_intr,
  83                 .handle_interrupt = genphy_handle_interrupt_no_ack,
  84                 .suspend        = genphy_suspend,
  85                 .resume         = genphy_resume,
  86                 .read_page      = mtk_gephy_read_page,
  87                 .write_page     = mtk_gephy_write_page,
  88         },
  89         {
  90                 PHY_ID_MATCH_EXACT(0x03a29441),
  91                 .name           = "MediaTek MT7531 PHY",
  92                 .config_init    = mt7531_phy_config_init,
  93                 /* Interrupts are handled by the switch, not the PHY
  94                  * itself.
  95                  */
  96                 .config_intr    = genphy_no_config_intr,
  97                 .handle_interrupt = genphy_handle_interrupt_no_ack,
  98                 .suspend        = genphy_suspend,
  99                 .resume         = genphy_resume,
 100                 .read_page      = mtk_gephy_read_page,
 101                 .write_page     = mtk_gephy_write_page,
 102         },
 103 };
 104
 105 module_phy_driver(mtk_gephy_driver);
 106
 107 static struct mdio_device_id __maybe_unused mtk_gephy_tbl[] = {
 108         { PHY_ID_MATCH_VENDOR(0x03a29400) },
 109         { }
 110 };
 111
 112 MODULE_DESCRIPTION("MediaTek Gigabit Ethernet PHY driver");
 113 MODULE_AUTHOR("DENG, Qingfang <dqfext@gmail.com>");
 114 MODULE_LICENSE("GPL");
 115
 116 MODULE_DEVICE_TABLE(mdio, mtk_gephy_tbl);