1 /* 2 * Driver for Vitesse PHYs 3 * 4 * Author: Kriston Carson 5 * 6 * Copyright (c) 2005, 2009, 2011 Freescale Semiconductor, Inc. 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 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/mii.h> 18 #include <linux/ethtool.h> 19 #include <linux/phy.h> 20 21 /* Vitesse Extended Page Magic Register(s) */ 22 #define MII_VSC82X4_EXT_PAGE_16E 0x10 23 #define MII_VSC82X4_EXT_PAGE_17E 0x11 24 #define MII_VSC82X4_EXT_PAGE_18E 0x12 25 26 /* Vitesse Extended Control Register 1 */ 27 #define MII_VSC8244_EXT_CON1 0x17 28 #define MII_VSC8244_EXTCON1_INIT 0x0000 29 #define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00 30 #define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300 31 #define MII_VSC8244_EXTCON1_TX_SKEW 0x0800 32 #define MII_VSC8244_EXTCON1_RX_SKEW 0x0200 33 34 /* Vitesse Interrupt Mask Register */ 35 #define MII_VSC8244_IMASK 0x19 36 #define MII_VSC8244_IMASK_IEN 0x8000 37 #define MII_VSC8244_IMASK_SPEED 0x4000 38 #define MII_VSC8244_IMASK_LINK 0x2000 39 #define MII_VSC8244_IMASK_DUPLEX 0x1000 40 #define MII_VSC8244_IMASK_MASK 0xf000 41 42 #define MII_VSC8221_IMASK_MASK 0xa000 43 44 /* Vitesse Interrupt Status Register */ 45 #define MII_VSC8244_ISTAT 0x1a 46 #define MII_VSC8244_ISTAT_STATUS 0x8000 47 #define MII_VSC8244_ISTAT_SPEED 0x4000 48 #define MII_VSC8244_ISTAT_LINK 0x2000 49 #define MII_VSC8244_ISTAT_DUPLEX 0x1000 50 51 /* Vitesse Auxiliary Control/Status Register */ 52 #define MII_VSC8244_AUX_CONSTAT 0x1c 53 #define MII_VSC8244_AUXCONSTAT_INIT 0x0000 54 #define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020 55 #define MII_VSC8244_AUXCONSTAT_SPEED 0x0018 56 #define MII_VSC8244_AUXCONSTAT_GBIT 0x0010 57 #define MII_VSC8244_AUXCONSTAT_100 0x0008 58 59 #define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */ 60 #define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004 61 62 /* Vitesse Extended Page Access Register */ 63 #define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f 64 65 #define PHY_ID_VSC8234 0x000fc620 66 #define PHY_ID_VSC8244 0x000fc6c0 67 #define PHY_ID_VSC8514 0x00070670 68 #define PHY_ID_VSC8574 0x000704a0 69 #define PHY_ID_VSC8601 0x00070420 70 #define PHY_ID_VSC8662 0x00070660 71 #define PHY_ID_VSC8221 0x000fc550 72 #define PHY_ID_VSC8211 0x000fc4b0 73 74 MODULE_DESCRIPTION("Vitesse PHY driver"); 75 MODULE_AUTHOR("Kriston Carson"); 76 MODULE_LICENSE("GPL"); 77 78 static int vsc824x_add_skew(struct phy_device *phydev) 79 { 80 int err; 81 int extcon; 82 83 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1); 84 85 if (extcon < 0) 86 return extcon; 87 88 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK | 89 MII_VSC8244_EXTCON1_RX_SKEW_MASK); 90 91 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW | 92 MII_VSC8244_EXTCON1_RX_SKEW); 93 94 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon); 95 96 return err; 97 } 98 99 static int vsc824x_config_init(struct phy_device *phydev) 100 { 101 int err; 102 103 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT, 104 MII_VSC8244_AUXCONSTAT_INIT); 105 if (err < 0) 106 return err; 107 108 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) 109 err = vsc824x_add_skew(phydev); 110 111 return err; 112 } 113 114 static int vsc824x_ack_interrupt(struct phy_device *phydev) 115 { 116 int err = 0; 117 118 /* Don't bother to ACK the interrupts if interrupts 119 * are disabled. The 824x cannot clear the interrupts 120 * if they are disabled. 121 */ 122 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 123 err = phy_read(phydev, MII_VSC8244_ISTAT); 124 125 return (err < 0) ? err : 0; 126 } 127 128 static int vsc82xx_config_intr(struct phy_device *phydev) 129 { 130 int err; 131 132 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 133 err = phy_write(phydev, MII_VSC8244_IMASK, 134 (phydev->drv->phy_id == PHY_ID_VSC8234 || 135 phydev->drv->phy_id == PHY_ID_VSC8244 || 136 phydev->drv->phy_id == PHY_ID_VSC8514 || 137 phydev->drv->phy_id == PHY_ID_VSC8574 || 138 phydev->drv->phy_id == PHY_ID_VSC8601) ? 139 MII_VSC8244_IMASK_MASK : 140 MII_VSC8221_IMASK_MASK); 141 else { 142 /* The Vitesse PHY cannot clear the interrupt 143 * once it has disabled them, so we clear them first 144 */ 145 err = phy_read(phydev, MII_VSC8244_ISTAT); 146 147 if (err < 0) 148 return err; 149 150 err = phy_write(phydev, MII_VSC8244_IMASK, 0); 151 } 152 153 return err; 154 } 155 156 static int vsc8221_config_init(struct phy_device *phydev) 157 { 158 int err; 159 160 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT, 161 MII_VSC8221_AUXCONSTAT_INIT); 162 return err; 163 164 /* Perhaps we should set EXT_CON1 based on the interface? 165 * Options are 802.3Z SerDes or SGMII 166 */ 167 } 168 169 /* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links 170 * @phydev: target phy_device struct 171 * 172 * Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing 173 * special values in the VSC8234/VSC8244 extended reserved registers 174 */ 175 static int vsc82x4_config_autocross_enable(struct phy_device *phydev) 176 { 177 int ret; 178 179 if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100) 180 return 0; 181 182 /* map extended registers set 0x10 - 0x1e */ 183 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5); 184 if (ret >= 0) 185 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012); 186 if (ret >= 0) 187 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803); 188 if (ret >= 0) 189 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa); 190 /* map standard registers set 0x10 - 0x1e */ 191 if (ret >= 0) 192 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000); 193 else 194 phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000); 195 196 return ret; 197 } 198 199 /* vsc82x4_config_aneg - restart auto-negotiation or write BMCR 200 * @phydev: target phy_device struct 201 * 202 * Description: If auto-negotiation is enabled, we configure the 203 * advertising, and then restart auto-negotiation. If it is not 204 * enabled, then we write the BMCR and also start the auto 205 * MDI/MDI-X feature 206 */ 207 static int vsc82x4_config_aneg(struct phy_device *phydev) 208 { 209 int ret; 210 211 /* Enable auto MDI/MDI-X when in 10/100 forced link speeds by 212 * writing special values in the VSC8234 extended reserved registers 213 */ 214 if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) { 215 ret = genphy_setup_forced(phydev); 216 217 if (ret < 0) /* error */ 218 return ret; 219 220 return vsc82x4_config_autocross_enable(phydev); 221 } 222 223 return genphy_config_aneg(phydev); 224 } 225 226 /* Vitesse 82xx */ 227 static struct phy_driver vsc82xx_driver[] = { 228 { 229 .phy_id = PHY_ID_VSC8234, 230 .name = "Vitesse VSC8234", 231 .phy_id_mask = 0x000ffff0, 232 .features = PHY_GBIT_FEATURES, 233 .flags = PHY_HAS_INTERRUPT, 234 .config_init = &vsc824x_config_init, 235 .config_aneg = &vsc82x4_config_aneg, 236 .read_status = &genphy_read_status, 237 .ack_interrupt = &vsc824x_ack_interrupt, 238 .config_intr = &vsc82xx_config_intr, 239 .driver = { .owner = THIS_MODULE,}, 240 }, { 241 .phy_id = PHY_ID_VSC8244, 242 .name = "Vitesse VSC8244", 243 .phy_id_mask = 0x000fffc0, 244 .features = PHY_GBIT_FEATURES, 245 .flags = PHY_HAS_INTERRUPT, 246 .config_init = &vsc824x_config_init, 247 .config_aneg = &vsc82x4_config_aneg, 248 .read_status = &genphy_read_status, 249 .ack_interrupt = &vsc824x_ack_interrupt, 250 .config_intr = &vsc82xx_config_intr, 251 .driver = { .owner = THIS_MODULE,}, 252 }, { 253 .phy_id = PHY_ID_VSC8514, 254 .name = "Vitesse VSC8514", 255 .phy_id_mask = 0x000ffff0, 256 .features = PHY_GBIT_FEATURES, 257 .flags = PHY_HAS_INTERRUPT, 258 .config_init = &vsc824x_config_init, 259 .config_aneg = &vsc82x4_config_aneg, 260 .read_status = &genphy_read_status, 261 .ack_interrupt = &vsc824x_ack_interrupt, 262 .config_intr = &vsc82xx_config_intr, 263 .driver = { .owner = THIS_MODULE,}, 264 }, { 265 .phy_id = PHY_ID_VSC8574, 266 .name = "Vitesse VSC8574", 267 .phy_id_mask = 0x000ffff0, 268 .features = PHY_GBIT_FEATURES, 269 .flags = PHY_HAS_INTERRUPT, 270 .config_init = &vsc824x_config_init, 271 .config_aneg = &vsc82x4_config_aneg, 272 .read_status = &genphy_read_status, 273 .ack_interrupt = &vsc824x_ack_interrupt, 274 .config_intr = &vsc82xx_config_intr, 275 .driver = { .owner = THIS_MODULE,}, 276 }, { 277 .phy_id = PHY_ID_VSC8601, 278 .name = "Vitesse VSC8601", 279 .phy_id_mask = 0x000ffff0, 280 .features = PHY_GBIT_FEATURES, 281 .flags = PHY_HAS_INTERRUPT, 282 .config_init = &genphy_config_init, 283 .config_aneg = &genphy_config_aneg, 284 .read_status = &genphy_read_status, 285 .ack_interrupt = &vsc824x_ack_interrupt, 286 .config_intr = &vsc82xx_config_intr, 287 .driver = { .owner = THIS_MODULE,}, 288 }, { 289 .phy_id = PHY_ID_VSC8662, 290 .name = "Vitesse VSC8662", 291 .phy_id_mask = 0x000ffff0, 292 .features = PHY_GBIT_FEATURES, 293 .flags = PHY_HAS_INTERRUPT, 294 .config_init = &vsc824x_config_init, 295 .config_aneg = &vsc82x4_config_aneg, 296 .read_status = &genphy_read_status, 297 .ack_interrupt = &vsc824x_ack_interrupt, 298 .config_intr = &vsc82xx_config_intr, 299 .driver = { .owner = THIS_MODULE,}, 300 }, { 301 /* Vitesse 8221 */ 302 .phy_id = PHY_ID_VSC8221, 303 .phy_id_mask = 0x000ffff0, 304 .name = "Vitesse VSC8221", 305 .features = PHY_GBIT_FEATURES, 306 .flags = PHY_HAS_INTERRUPT, 307 .config_init = &vsc8221_config_init, 308 .config_aneg = &genphy_config_aneg, 309 .read_status = &genphy_read_status, 310 .ack_interrupt = &vsc824x_ack_interrupt, 311 .config_intr = &vsc82xx_config_intr, 312 .driver = { .owner = THIS_MODULE,}, 313 }, { 314 /* Vitesse 8211 */ 315 .phy_id = PHY_ID_VSC8211, 316 .phy_id_mask = 0x000ffff0, 317 .name = "Vitesse VSC8211", 318 .features = PHY_GBIT_FEATURES, 319 .flags = PHY_HAS_INTERRUPT, 320 .config_init = &vsc8221_config_init, 321 .config_aneg = &genphy_config_aneg, 322 .read_status = &genphy_read_status, 323 .ack_interrupt = &vsc824x_ack_interrupt, 324 .config_intr = &vsc82xx_config_intr, 325 .driver = { .owner = THIS_MODULE,}, 326 } }; 327 328 module_phy_driver(vsc82xx_driver); 329 330 static struct mdio_device_id __maybe_unused vitesse_tbl[] = { 331 { PHY_ID_VSC8234, 0x000ffff0 }, 332 { PHY_ID_VSC8244, 0x000fffc0 }, 333 { PHY_ID_VSC8514, 0x000ffff0 }, 334 { PHY_ID_VSC8574, 0x000ffff0 }, 335 { PHY_ID_VSC8662, 0x000ffff0 }, 336 { PHY_ID_VSC8221, 0x000ffff0 }, 337 { PHY_ID_VSC8211, 0x000ffff0 }, 338 { } 339 }; 340 341 MODULE_DEVICE_TABLE(mdio, vitesse_tbl); 342