| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the Renesas PHY uPD60620. |
| 3 | * |
| 4 | * Copyright (C) 2015 Softing Industrial Automation GmbH |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/phy.h> |
| 16 | |
| 17 | #define UPD60620_PHY_ID 0xb8242824 |
| 18 | |
| 19 | /* Extended Registers and values */ |
| 20 | /* PHY Special Control/Status */ |
| 21 | #define PHY_PHYSCR 0x1F /* PHY.31 */ |
| 22 | #define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */ |
| 23 | #define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */ |
| 24 | #define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */ |
| 25 | |
| 26 | /* PHY Special Modes */ |
| 27 | #define PHY_SPM 0x12 /* PHY.18 */ |
| 28 | |
| 29 | /* Init PHY */ |
| 30 | |
| 31 | static int upd60620_config_init(struct phy_device *phydev) |
| 32 | { |
| 33 | /* Enable support for passive HUBs (could be a strap option) */ |
| 34 | /* PHYMODE: All speeds, HD in parallel detect */ |
| 35 | return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr); |
| 36 | } |
| 37 | |
| 38 | /* Get PHY status from common registers */ |
| 39 | |
| 40 | static int upd60620_read_status(struct phy_device *phydev) |
| 41 | { |
| 42 | int phy_state; |
| 43 | |
| 44 | /* Read negotiated state */ |
| 45 | phy_state = phy_read(phydev, MII_BMSR); |
| 46 | if (phy_state < 0) |
| 47 | return phy_state; |
| 48 | |
| 49 | phydev->link = 0; |
| 50 | phydev->lp_advertising = 0; |
| 51 | phydev->pause = 0; |
| 52 | phydev->asym_pause = 0; |
| 53 | |
| 54 | if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) { |
| 55 | phy_state = phy_read(phydev, PHY_PHYSCR); |
| 56 | if (phy_state < 0) |
| 57 | return phy_state; |
| 58 | |
| 59 | if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) { |
| 60 | phydev->link = 1; |
| 61 | phydev->speed = SPEED_10; |
| 62 | phydev->duplex = DUPLEX_HALF; |
| 63 | |
| 64 | if (phy_state & PHY_PHYSCR_100MB) |
| 65 | phydev->speed = SPEED_100; |
| 66 | if (phy_state & PHY_PHYSCR_DUPLEX) |
| 67 | phydev->duplex = DUPLEX_FULL; |
| 68 | |
| 69 | phy_state = phy_read(phydev, MII_LPA); |
| 70 | if (phy_state < 0) |
| 71 | return phy_state; |
| 72 | |
| 73 | phydev->lp_advertising |
| 74 | = mii_lpa_to_ethtool_lpa_t(phy_state); |
| 75 | |
| 76 | if (phydev->duplex == DUPLEX_FULL) { |
| 77 | if (phy_state & LPA_PAUSE_CAP) |
| 78 | phydev->pause = 1; |
| 79 | if (phy_state & LPA_PAUSE_ASYM) |
| 80 | phydev->asym_pause = 1; |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); |
| 88 | MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>"); |
| 89 | MODULE_LICENSE("GPL"); |
| 90 | |
| 91 | static struct phy_driver upd60620_driver[1] = { { |
| 92 | .phy_id = UPD60620_PHY_ID, |
| 93 | .phy_id_mask = 0xfffffffe, |
| 94 | .name = "Renesas uPD60620", |
| 95 | .features = PHY_BASIC_FEATURES, |
| 96 | .flags = 0, |
| 97 | .config_init = upd60620_config_init, |
| 98 | .read_status = upd60620_read_status, |
| 99 | } }; |
| 100 | |
| 101 | module_phy_driver(upd60620_driver); |
| 102 | |
| 103 | static struct mdio_device_id __maybe_unused upd60620_tbl[] = { |
| 104 | { UPD60620_PHY_ID, 0xfffffffe }, |
| 105 | { } |
| 106 | }; |
| 107 | |
| 108 | MODULE_DEVICE_TABLE(mdio, upd60620_tbl); |