1 /* 2 * drivers/net/phy/micrel.c 3 * 4 * Driver for Micrel PHYs 5 * 6 * Author: David J. Choi 7 * 8 * Copyright (c) 2010 Micrel, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 * Support : ksz9021 1000/100/10 phy from Micrel 16 * ks8001, ks8737, ks8721, ks8041, ks8051 100/10 phy 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/phy.h> 22 #include <linux/micrel_phy.h> 23 24 /* general Interrupt control/status reg in vendor specific block. */ 25 #define MII_KSZPHY_INTCS 0x1B 26 #define KSZPHY_INTCS_JABBER (1 << 15) 27 #define KSZPHY_INTCS_RECEIVE_ERR (1 << 14) 28 #define KSZPHY_INTCS_PAGE_RECEIVE (1 << 13) 29 #define KSZPHY_INTCS_PARELLEL (1 << 12) 30 #define KSZPHY_INTCS_LINK_PARTNER_ACK (1 << 11) 31 #define KSZPHY_INTCS_LINK_DOWN (1 << 10) 32 #define KSZPHY_INTCS_REMOTE_FAULT (1 << 9) 33 #define KSZPHY_INTCS_LINK_UP (1 << 8) 34 #define KSZPHY_INTCS_ALL (KSZPHY_INTCS_LINK_UP |\ 35 KSZPHY_INTCS_LINK_DOWN) 36 37 /* general PHY control reg in vendor specific block. */ 38 #define MII_KSZPHY_CTRL 0x1F 39 /* bitmap of PHY register to set interrupt mode */ 40 #define KSZPHY_CTRL_INT_ACTIVE_HIGH (1 << 9) 41 #define KSZ9021_CTRL_INT_ACTIVE_HIGH (1 << 14) 42 #define KS8737_CTRL_INT_ACTIVE_HIGH (1 << 14) 43 #define KSZ8051_RMII_50MHZ_CLK (1 << 7) 44 45 static int kszphy_ack_interrupt(struct phy_device *phydev) 46 { 47 /* bit[7..0] int status, which is a read and clear register. */ 48 int rc; 49 50 rc = phy_read(phydev, MII_KSZPHY_INTCS); 51 52 return (rc < 0) ? rc : 0; 53 } 54 55 static int kszphy_set_interrupt(struct phy_device *phydev) 56 { 57 int temp; 58 temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ? 59 KSZPHY_INTCS_ALL : 0; 60 return phy_write(phydev, MII_KSZPHY_INTCS, temp); 61 } 62 63 static int kszphy_config_intr(struct phy_device *phydev) 64 { 65 int temp, rc; 66 67 /* set the interrupt pin active low */ 68 temp = phy_read(phydev, MII_KSZPHY_CTRL); 69 temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH; 70 phy_write(phydev, MII_KSZPHY_CTRL, temp); 71 rc = kszphy_set_interrupt(phydev); 72 return rc < 0 ? rc : 0; 73 } 74 75 static int ksz9021_config_intr(struct phy_device *phydev) 76 { 77 int temp, rc; 78 79 /* set the interrupt pin active low */ 80 temp = phy_read(phydev, MII_KSZPHY_CTRL); 81 temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH; 82 phy_write(phydev, MII_KSZPHY_CTRL, temp); 83 rc = kszphy_set_interrupt(phydev); 84 return rc < 0 ? rc : 0; 85 } 86 87 static int ks8737_config_intr(struct phy_device *phydev) 88 { 89 int temp, rc; 90 91 /* set the interrupt pin active low */ 92 temp = phy_read(phydev, MII_KSZPHY_CTRL); 93 temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH; 94 phy_write(phydev, MII_KSZPHY_CTRL, temp); 95 rc = kszphy_set_interrupt(phydev); 96 return rc < 0 ? rc : 0; 97 } 98 99 static int kszphy_config_init(struct phy_device *phydev) 100 { 101 return 0; 102 } 103 104 static int ks8051_config_init(struct phy_device *phydev) 105 { 106 int regval; 107 108 if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) { 109 regval = phy_read(phydev, MII_KSZPHY_CTRL); 110 regval |= KSZ8051_RMII_50MHZ_CLK; 111 phy_write(phydev, MII_KSZPHY_CTRL, regval); 112 } 113 114 return 0; 115 } 116 117 static struct phy_driver ksphy_driver[] = { 118 { 119 .phy_id = PHY_ID_KS8737, 120 .phy_id_mask = 0x00fffff0, 121 .name = "Micrel KS8737", 122 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 123 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 124 .config_init = kszphy_config_init, 125 .config_aneg = genphy_config_aneg, 126 .read_status = genphy_read_status, 127 .ack_interrupt = kszphy_ack_interrupt, 128 .config_intr = ks8737_config_intr, 129 .driver = { .owner = THIS_MODULE,}, 130 }, { 131 .phy_id = PHY_ID_KS8041, 132 .phy_id_mask = 0x00fffff0, 133 .name = "Micrel KS8041", 134 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 135 | SUPPORTED_Asym_Pause), 136 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 137 .config_init = kszphy_config_init, 138 .config_aneg = genphy_config_aneg, 139 .read_status = genphy_read_status, 140 .ack_interrupt = kszphy_ack_interrupt, 141 .config_intr = kszphy_config_intr, 142 .driver = { .owner = THIS_MODULE,}, 143 }, { 144 .phy_id = PHY_ID_KS8051, 145 .phy_id_mask = 0x00fffff0, 146 .name = "Micrel KS8051", 147 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 148 | SUPPORTED_Asym_Pause), 149 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 150 .config_init = ks8051_config_init, 151 .config_aneg = genphy_config_aneg, 152 .read_status = genphy_read_status, 153 .ack_interrupt = kszphy_ack_interrupt, 154 .config_intr = kszphy_config_intr, 155 .driver = { .owner = THIS_MODULE,}, 156 }, { 157 .phy_id = PHY_ID_KS8001, 158 .name = "Micrel KS8001 or KS8721", 159 .phy_id_mask = 0x00ffffff, 160 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 161 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 162 .config_init = kszphy_config_init, 163 .config_aneg = genphy_config_aneg, 164 .read_status = genphy_read_status, 165 .ack_interrupt = kszphy_ack_interrupt, 166 .config_intr = kszphy_config_intr, 167 .driver = { .owner = THIS_MODULE,}, 168 }, { 169 .phy_id = PHY_ID_KSZ9021, 170 .phy_id_mask = 0x000ffffe, 171 .name = "Micrel KSZ9021 Gigabit PHY", 172 .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause 173 | SUPPORTED_Asym_Pause), 174 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 175 .config_init = kszphy_config_init, 176 .config_aneg = genphy_config_aneg, 177 .read_status = genphy_read_status, 178 .ack_interrupt = kszphy_ack_interrupt, 179 .config_intr = ksz9021_config_intr, 180 .driver = { .owner = THIS_MODULE, }, 181 } }; 182 183 static int __init ksphy_init(void) 184 { 185 return phy_drivers_register(ksphy_driver, 186 ARRAY_SIZE(ksphy_driver)); 187 } 188 189 static void __exit ksphy_exit(void) 190 { 191 phy_drivers_unregister(ksphy_driver, 192 ARRAY_SIZE(ksphy_driver)); 193 } 194 195 module_init(ksphy_init); 196 module_exit(ksphy_exit); 197 198 MODULE_DESCRIPTION("Micrel PHY driver"); 199 MODULE_AUTHOR("David J. Choi"); 200 MODULE_LICENSE("GPL"); 201 202 static struct mdio_device_id __maybe_unused micrel_tbl[] = { 203 { PHY_ID_KSZ9021, 0x000ffffe }, 204 { PHY_ID_KS8001, 0x00ffffff }, 205 { PHY_ID_KS8737, 0x00fffff0 }, 206 { PHY_ID_KS8041, 0x00fffff0 }, 207 { PHY_ID_KS8051, 0x00fffff0 }, 208 { } 209 }; 210 211 MODULE_DEVICE_TABLE(mdio, micrel_tbl); 212