| 1 | /* |
| 2 | * Driver for Micrel/Kendin PHYs |
| 3 | * |
| 4 | * Copyright (c) 2008-2009 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published |
| 9 | * by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/skbuff.h> |
| 16 | #include <linux/phy.h> |
| 17 | |
| 18 | #define KSZ_REG_INT_CTRL 0x1b |
| 19 | |
| 20 | #define KSZ_INT_LU_EN (1 << 8) /* enable Link Up interrupt */ |
| 21 | #define KSZ_INT_RF_EN (1 << 9) /* enable Remote Fault interrupt */ |
| 22 | #define KSZ_INT_LD_EN (1 << 10) /* enable Link Down interrupt */ |
| 23 | |
| 24 | #define KSZ_INT_INIT (KSZ_INT_LU_EN | KSZ_INT_LD_EN) |
| 25 | |
| 26 | static int ksz8041_ack_interrupt(struct phy_device *phydev) |
| 27 | { |
| 28 | int err; |
| 29 | |
| 30 | err = phy_read(phydev, KSZ_REG_INT_CTRL); |
| 31 | |
| 32 | return (err < 0) ? err : 0; |
| 33 | } |
| 34 | |
| 35 | static int ksz8041_config_intr(struct phy_device *phydev) |
| 36 | { |
| 37 | int err; |
| 38 | |
| 39 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) |
| 40 | err = phy_write(phydev, KSZ_REG_INT_CTRL, |
| 41 | KSZ_INT_INIT); |
| 42 | else |
| 43 | err = phy_write(phydev, KSZ_REG_INT_CTRL, 0); |
| 44 | |
| 45 | return err; |
| 46 | } |
| 47 | |
| 48 | static struct phy_driver ksz8041_phy_driver = { |
| 49 | .phy_id = 0x00221512, |
| 50 | .name = "Micrel KSZ8041", |
| 51 | .phy_id_mask = 0x001fffff, |
| 52 | .features = PHY_BASIC_FEATURES, |
| 53 | .flags = PHY_HAS_INTERRUPT, |
| 54 | .config_aneg = genphy_config_aneg, |
| 55 | .read_status = genphy_read_status, |
| 56 | .ack_interrupt = ksz8041_ack_interrupt, |
| 57 | .config_intr = ksz8041_config_intr, |
| 58 | .driver = { |
| 59 | .owner = THIS_MODULE, |
| 60 | }, |
| 61 | }; |
| 62 | |
| 63 | static int __init micrel_phy_init(void) |
| 64 | { |
| 65 | return phy_driver_register(&ksz8041_phy_driver); |
| 66 | } |
| 67 | |
| 68 | static void __exit micrel_phy_exit(void) |
| 69 | { |
| 70 | phy_driver_unregister(&ksz8041_phy_driver); |
| 71 | } |
| 72 | |
| 73 | #ifdef MODULE |
| 74 | module_init(micrel_phy_init); |
| 75 | module_exit(micrel_phy_exit); |
| 76 | #else |
| 77 | subsys_initcall(micrel_phy_init); |
| 78 | #endif |
| 79 | |
| 80 | MODULE_DESCRIPTION("Micrel/Kendin PHY driver"); |
| 81 | MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); |
| 82 | MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); |
| 83 | MODULE_LICENSE("GPL v2"); |
| 84 | |
