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 23 #define PHY_ID_KSZ9021 0x00221611 24 #define PHY_ID_KS8737 0x00221720 25 #define PHY_ID_KS8041 0x00221510 26 #define PHY_ID_KS8051 0x00221550 27 /* both for ks8001 Rev. A/B, and for ks8721 Rev 3. */ 28 #define PHY_ID_KS8001 0x0022161A 29 30 /* general Interrupt control/status reg in vendor specific block. */ 31 #define MII_KSZPHY_INTCS 0x1B 32 #define KSZPHY_INTCS_JABBER (1 << 15) 33 #define KSZPHY_INTCS_RECEIVE_ERR (1 << 14) 34 #define KSZPHY_INTCS_PAGE_RECEIVE (1 << 13) 35 #define KSZPHY_INTCS_PARELLEL (1 << 12) 36 #define KSZPHY_INTCS_LINK_PARTNER_ACK (1 << 11) 37 #define KSZPHY_INTCS_LINK_DOWN (1 << 10) 38 #define KSZPHY_INTCS_REMOTE_FAULT (1 << 9) 39 #define KSZPHY_INTCS_LINK_UP (1 << 8) 40 #define KSZPHY_INTCS_ALL (KSZPHY_INTCS_LINK_UP |\ 41 KSZPHY_INTCS_LINK_DOWN) 42 43 /* general PHY control reg in vendor specific block. */ 44 #define MII_KSZPHY_CTRL 0x1F 45 /* bitmap of PHY register to set interrupt mode */ 46 #define KSZPHY_CTRL_INT_ACTIVE_HIGH (1 << 9) 47 #define KSZ9021_CTRL_INT_ACTIVE_HIGH (1 << 14) 48 #define KS8737_CTRL_INT_ACTIVE_HIGH (1 << 14) 49 50 static int kszphy_ack_interrupt(struct phy_device *phydev) 51 { 52 /* bit[7..0] int status, which is a read and clear register. */ 53 int rc; 54 55 rc = phy_read(phydev, MII_KSZPHY_INTCS); 56 57 return (rc < 0) ? rc : 0; 58 } 59 60 static int kszphy_set_interrupt(struct phy_device *phydev) 61 { 62 int temp; 63 temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ? 64 KSZPHY_INTCS_ALL : 0; 65 return phy_write(phydev, MII_KSZPHY_INTCS, temp); 66 } 67 68 static int kszphy_config_intr(struct phy_device *phydev) 69 { 70 int temp, rc; 71 72 /* set the interrupt pin active low */ 73 temp = phy_read(phydev, MII_KSZPHY_CTRL); 74 temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH; 75 phy_write(phydev, MII_KSZPHY_CTRL, temp); 76 rc = kszphy_set_interrupt(phydev); 77 return rc < 0 ? rc : 0; 78 } 79 80 static int ksz9021_config_intr(struct phy_device *phydev) 81 { 82 int temp, rc; 83 84 /* set the interrupt pin active low */ 85 temp = phy_read(phydev, MII_KSZPHY_CTRL); 86 temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH; 87 phy_write(phydev, MII_KSZPHY_CTRL, temp); 88 rc = kszphy_set_interrupt(phydev); 89 return rc < 0 ? rc : 0; 90 } 91 92 static int ks8737_config_intr(struct phy_device *phydev) 93 { 94 int temp, rc; 95 96 /* set the interrupt pin active low */ 97 temp = phy_read(phydev, MII_KSZPHY_CTRL); 98 temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH; 99 phy_write(phydev, MII_KSZPHY_CTRL, temp); 100 rc = kszphy_set_interrupt(phydev); 101 return rc < 0 ? rc : 0; 102 } 103 104 static int kszphy_config_init(struct phy_device *phydev) 105 { 106 return 0; 107 } 108 109 static struct phy_driver ks8737_driver = { 110 .phy_id = PHY_ID_KS8737, 111 .phy_id_mask = 0x00fffff0, 112 .name = "Micrel KS8737", 113 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 114 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 115 .config_init = kszphy_config_init, 116 .config_aneg = genphy_config_aneg, 117 .read_status = genphy_read_status, 118 .ack_interrupt = kszphy_ack_interrupt, 119 .config_intr = ks8737_config_intr, 120 .driver = { .owner = THIS_MODULE,}, 121 }; 122 123 static struct phy_driver ks8041_driver = { 124 .phy_id = PHY_ID_KS8041, 125 .phy_id_mask = 0x00fffff0, 126 .name = "Micrel KS8041", 127 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 128 | SUPPORTED_Asym_Pause), 129 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 130 .config_init = kszphy_config_init, 131 .config_aneg = genphy_config_aneg, 132 .read_status = genphy_read_status, 133 .ack_interrupt = kszphy_ack_interrupt, 134 .config_intr = kszphy_config_intr, 135 .driver = { .owner = THIS_MODULE,}, 136 }; 137 138 static struct phy_driver ks8051_driver = { 139 .phy_id = PHY_ID_KS8051, 140 .phy_id_mask = 0x00fffff0, 141 .name = "Micrel KS8051", 142 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause 143 | SUPPORTED_Asym_Pause), 144 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 145 .config_init = kszphy_config_init, 146 .config_aneg = genphy_config_aneg, 147 .read_status = genphy_read_status, 148 .ack_interrupt = kszphy_ack_interrupt, 149 .config_intr = kszphy_config_intr, 150 .driver = { .owner = THIS_MODULE,}, 151 }; 152 153 static struct phy_driver ks8001_driver = { 154 .phy_id = PHY_ID_KS8001, 155 .name = "Micrel KS8001 or KS8721", 156 .phy_id_mask = 0x00fffff0, 157 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause), 158 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 159 .config_init = kszphy_config_init, 160 .config_aneg = genphy_config_aneg, 161 .read_status = genphy_read_status, 162 .ack_interrupt = kszphy_ack_interrupt, 163 .config_intr = kszphy_config_intr, 164 .driver = { .owner = THIS_MODULE,}, 165 }; 166 167 static struct phy_driver ksz9021_driver = { 168 .phy_id = PHY_ID_KSZ9021, 169 .phy_id_mask = 0x000fff10, 170 .name = "Micrel KSZ9021 Gigabit PHY", 171 .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause 172 | SUPPORTED_Asym_Pause), 173 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, 174 .config_init = kszphy_config_init, 175 .config_aneg = genphy_config_aneg, 176 .read_status = genphy_read_status, 177 .ack_interrupt = kszphy_ack_interrupt, 178 .config_intr = ksz9021_config_intr, 179 .driver = { .owner = THIS_MODULE, }, 180 }; 181 182 static int __init ksphy_init(void) 183 { 184 int ret; 185 186 ret = phy_driver_register(&ks8001_driver); 187 if (ret) 188 goto err1; 189 190 ret = phy_driver_register(&ksz9021_driver); 191 if (ret) 192 goto err2; 193 194 ret = phy_driver_register(&ks8737_driver); 195 if (ret) 196 goto err3; 197 ret = phy_driver_register(&ks8041_driver); 198 if (ret) 199 goto err4; 200 ret = phy_driver_register(&ks8051_driver); 201 if (ret) 202 goto err5; 203 204 return 0; 205 206 err5: 207 phy_driver_unregister(&ks8041_driver); 208 err4: 209 phy_driver_unregister(&ks8737_driver); 210 err3: 211 phy_driver_unregister(&ksz9021_driver); 212 err2: 213 phy_driver_unregister(&ks8001_driver); 214 err1: 215 return ret; 216 } 217 218 static void __exit ksphy_exit(void) 219 { 220 phy_driver_unregister(&ks8001_driver); 221 phy_driver_unregister(&ks8737_driver); 222 phy_driver_unregister(&ksz9021_driver); 223 phy_driver_unregister(&ks8041_driver); 224 phy_driver_unregister(&ks8051_driver); 225 } 226 227 module_init(ksphy_init); 228 module_exit(ksphy_exit); 229 230 MODULE_DESCRIPTION("Micrel PHY driver"); 231 MODULE_AUTHOR("David J. Choi"); 232 MODULE_LICENSE("GPL"); 233 234 static struct mdio_device_id __maybe_unused micrel_tbl[] = { 235 { PHY_ID_KSZ9021, 0x000fff10 }, 236 { PHY_ID_KS8001, 0x00fffff0 }, 237 { PHY_ID_KS8737, 0x00fffff0 }, 238 { PHY_ID_KS8041, 0x00fffff0 }, 239 { PHY_ID_KS8051, 0x00fffff0 }, 240 { } 241 }; 242 243 MODULE_DEVICE_TABLE(mdio, micrel_tbl); 244