| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Driver for AMD am79c PHYs |
| 3 | * |
| 4 | * Author: Heiko Schocher <hs@denx.de> |
| 5 | * |
| 6 | * Copyright (c) 2011 DENX Software Engineering GmbH |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | */ |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/mii.h> |
| 19 | #include <linux/phy.h> |
| 20 | |
| 21 | #define PHY_ID_AM79C874 0x0022561b |
| 22 | |
| 23 | #define MII_AM79C_IR 17 /* Interrupt Status/Control Register */ |
| 24 | #define MII_AM79C_IR_EN_LINK 0x0400 /* IR enable Linkstate */ |
| 25 | #define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */ |
| 26 | #define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG) |
| 27 | |
| 28 | MODULE_DESCRIPTION("AMD PHY driver"); |
| 29 | MODULE_AUTHOR("Heiko Schocher <hs@denx.de>"); |
| 30 | MODULE_LICENSE("GPL"); |
| 31 | |
| 32 | static int am79c_ack_interrupt(struct phy_device *phydev) |
| 33 | { |
| 34 | int err; |
| 35 | |
| 36 | err = phy_read(phydev, MII_BMSR); |
| 37 | if (err < 0) |
| 38 | return err; |
| 39 | |
| 40 | err = phy_read(phydev, MII_AM79C_IR); |
| 41 | if (err < 0) |
| 42 | return err; |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int am79c_config_init(struct phy_device *phydev) |
| 48 | { |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | static int am79c_config_intr(struct phy_device *phydev) |
| 53 | { |
| 54 | int err; |
| 55 | |
| 56 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) |
| 57 | err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT); |
| 58 | else |
| 59 | err = phy_write(phydev, MII_AM79C_IR, 0); |
| 60 | |
| 61 | return err; |
| 62 | } |
| 63 | |
| 64 | static struct phy_driver am79c_driver[] = { { |
| 65 | .phy_id = PHY_ID_AM79C874, |
| 66 | .name = "AM79C874", |
| 67 | .phy_id_mask = 0xfffffff0, |
| 68 | .features = PHY_BASIC_FEATURES, |
| 69 | .flags = PHY_HAS_INTERRUPT, |
| 70 | .config_init = am79c_config_init, |
| 71 | .ack_interrupt = am79c_ack_interrupt, |
| 72 | .config_intr = am79c_config_intr, |
| 73 | } }; |
| 74 | |
| 75 | module_phy_driver(am79c_driver); |
| 76 | |
| 77 | static struct mdio_device_id __maybe_unused amd_tbl[] = { |
| 78 | { PHY_ID_AM79C874, 0xfffffff0 }, |
| 79 | { } |
| 80 | }; |
| 81 | |
| 82 | MODULE_DEVICE_TABLE(mdio, amd_tbl); |