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 ks8737_driver = { 118 .phy_id = PHY_ID_KS8737, 119 .phy_id_mask = 0x00fffff0, 120 .name = "Micrel KS8737", 121 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 122 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 123 .config_init = kszphy_config_init, 124 .config_aneg = genphy_config_aneg, 125 .read_status = genphy_read_status, 126 .ack_interrupt = kszphy_ack_interrupt, 127 .config_intr = ks8737_config_intr, 128 .driver = { .owner = THIS_MODULE,}, 129 }; 130 131 static struct phy_driver ks8041_driver = { 132 .phy_id = PHY_ID_KS8041, 133 .phy_id_mask = 0x00fffff0, 134 .name = "Micrel KS8041", 135 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 136 | SUPPORTED_Asym_Pause), 137 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 138 .config_init = kszphy_config_init, 139 .config_aneg = genphy_config_aneg, 140 .read_status = genphy_read_status, 141 .ack_interrupt = kszphy_ack_interrupt, 142 .config_intr = kszphy_config_intr, 143 .driver = { .owner = THIS_MODULE,}, 144 }; 145 146 static struct phy_driver ks8051_driver = { 147 .phy_id = PHY_ID_KS8051, 148 .phy_id_mask = 0x00fffff0, 149 .name = "Micrel KS8051", 150 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 151 | SUPPORTED_Asym_Pause), 152 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 153 .config_init = ks8051_config_init, 154 .config_aneg = genphy_config_aneg, 155 .read_status = genphy_read_status, 156 .ack_interrupt = kszphy_ack_interrupt, 157 .config_intr = kszphy_config_intr, 158 .driver = { .owner = THIS_MODULE,}, 159 }; 160 161 static struct phy_driver ks8001_driver = { 162 .phy_id = PHY_ID_KS8001, 163 .name = "Micrel KS8001 or KS8721", 164 .phy_id_mask = 0x00ffffff, 165 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 166 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 167 .config_init = kszphy_config_init, 168 .config_aneg = genphy_config_aneg, 169 .read_status = genphy_read_status, 170 .ack_interrupt = kszphy_ack_interrupt, 171 .config_intr = kszphy_config_intr, 172 .driver = { .owner = THIS_MODULE,}, 173 }; 174 175 static struct phy_driver ksz9021_driver = { 176 .phy_id = PHY_ID_KSZ9021, 177 .phy_id_mask = 0x000ffffe, 178 .name = "Micrel KSZ9021 Gigabit PHY", 179 .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause 180 | SUPPORTED_Asym_Pause), 181 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 182 .config_init = kszphy_config_init, 183 .config_aneg = genphy_config_aneg, 184 .read_status = genphy_read_status, 185 .ack_interrupt = kszphy_ack_interrupt, 186 .config_intr = ksz9021_config_intr, 187 .driver = { .owner = THIS_MODULE, }, 188 }; 189 190 static int __init ksphy_init(void) 191 { 192 int ret; 193 194 ret = phy_driver_register(&ks8001_driver); 195 if (ret) 196 goto err1; 197 198 ret = phy_driver_register(&ksz9021_driver); 199 if (ret) 200 goto err2; 201 202 ret = phy_driver_register(&ks8737_driver); 203 if (ret) 204 goto err3; 205 ret = phy_driver_register(&ks8041_driver); 206 if (ret) 207 goto err4; 208 ret = phy_driver_register(&ks8051_driver); 209 if (ret) 210 goto err5; 211 212 return 0; 213 214 err5: 215 phy_driver_unregister(&ks8041_driver); 216 err4: 217 phy_driver_unregister(&ks8737_driver); 218 err3: 219 phy_driver_unregister(&ksz9021_driver); 220 err2: 221 phy_driver_unregister(&ks8001_driver); 222 err1: 223 return ret; 224 } 225 226 static void __exit ksphy_exit(void) 227 { 228 phy_driver_unregister(&ks8001_driver); 229 phy_driver_unregister(&ks8737_driver); 230 phy_driver_unregister(&ksz9021_driver); 231 phy_driver_unregister(&ks8041_driver); 232 phy_driver_unregister(&ks8051_driver); 233 } 234 235 module_init(ksphy_init); 236 module_exit(ksphy_exit); 237 238 MODULE_DESCRIPTION("Micrel PHY driver"); 239 MODULE_AUTHOR("David J. Choi"); 240 MODULE_LICENSE("GPL"); 241 242 static struct mdio_device_id __maybe_unused micrel_tbl[] = { 243 { PHY_ID_KSZ9021, 0x000ffffe }, 244 { PHY_ID_KS8001, 0x00ffffff }, 245 { PHY_ID_KS8737, 0x00fffff0 }, 246 { PHY_ID_KS8041, 0x00fffff0 }, 247 { PHY_ID_KS8051, 0x00fffff0 }, 248 { } 249 }; 250 251 MODULE_DEVICE_TABLE(mdio, micrel_tbl); 252