1 /* 2 * drivers/net/phy/realtek.c 3 * 4 * Driver for Realtek PHYs 5 * 6 * Author: Johnson Leung <r58129@freescale.com> 7 * 8 * Copyright (c) 2004 Freescale Semiconductor, 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 */ 16 #include <linux/bitops.h> 17 #include <linux/phy.h> 18 #include <linux/module.h> 19 20 #define RTL821x_PHYSR 0x11 21 #define RTL821x_PHYSR_DUPLEX BIT(13) 22 #define RTL821x_PHYSR_SPEED GENMASK(15, 14) 23 24 #define RTL821x_INER 0x12 25 #define RTL8211B_INER_INIT 0x6400 26 #define RTL8211E_INER_LINK_STATUS BIT(10) 27 #define RTL8211F_INER_LINK_STATUS BIT(4) 28 29 #define RTL821x_INSR 0x13 30 31 #define RTL821x_PAGE_SELECT 0x1f 32 33 #define RTL8211F_INSR 0x1d 34 35 #define RTL8211F_TX_DELAY BIT(8) 36 37 #define RTL8201F_ISR 0x1e 38 #define RTL8201F_IER 0x13 39 40 MODULE_DESCRIPTION("Realtek PHY driver"); 41 MODULE_AUTHOR("Johnson Leung"); 42 MODULE_LICENSE("GPL"); 43 44 static int rtl821x_read_page(struct phy_device *phydev) 45 { 46 return __phy_read(phydev, RTL821x_PAGE_SELECT); 47 } 48 49 static int rtl821x_write_page(struct phy_device *phydev, int page) 50 { 51 return __phy_write(phydev, RTL821x_PAGE_SELECT, page); 52 } 53 54 static int rtl8201_ack_interrupt(struct phy_device *phydev) 55 { 56 int err; 57 58 err = phy_read(phydev, RTL8201F_ISR); 59 60 return (err < 0) ? err : 0; 61 } 62 63 static int rtl821x_ack_interrupt(struct phy_device *phydev) 64 { 65 int err; 66 67 err = phy_read(phydev, RTL821x_INSR); 68 69 return (err < 0) ? err : 0; 70 } 71 72 static int rtl8211f_ack_interrupt(struct phy_device *phydev) 73 { 74 int err; 75 76 err = phy_read_paged(phydev, 0xa43, RTL8211F_INSR); 77 78 return (err < 0) ? err : 0; 79 } 80 81 static int rtl8201_config_intr(struct phy_device *phydev) 82 { 83 u16 val; 84 85 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 86 val = BIT(13) | BIT(12) | BIT(11); 87 else 88 val = 0; 89 90 return phy_write_paged(phydev, 0x7, RTL8201F_IER, val); 91 } 92 93 static int rtl8211b_config_intr(struct phy_device *phydev) 94 { 95 int err; 96 97 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 98 err = phy_write(phydev, RTL821x_INER, 99 RTL8211B_INER_INIT); 100 else 101 err = phy_write(phydev, RTL821x_INER, 0); 102 103 return err; 104 } 105 106 static int rtl8211e_config_intr(struct phy_device *phydev) 107 { 108 int err; 109 110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 111 err = phy_write(phydev, RTL821x_INER, 112 RTL8211E_INER_LINK_STATUS); 113 else 114 err = phy_write(phydev, RTL821x_INER, 0); 115 116 return err; 117 } 118 119 static int rtl8211f_config_intr(struct phy_device *phydev) 120 { 121 u16 val; 122 123 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 124 val = RTL8211F_INER_LINK_STATUS; 125 else 126 val = 0; 127 128 return phy_write_paged(phydev, 0xa42, RTL821x_INER, val); 129 } 130 131 static int rtl8211_config_aneg(struct phy_device *phydev) 132 { 133 int ret; 134 135 ret = genphy_config_aneg(phydev); 136 if (ret < 0) 137 return ret; 138 139 /* Quirk was copied from vendor driver. Unfortunately it includes no 140 * description of the magic numbers. 141 */ 142 if (phydev->speed == SPEED_100 && phydev->autoneg == AUTONEG_DISABLE) { 143 phy_write(phydev, 0x17, 0x2138); 144 phy_write(phydev, 0x0e, 0x0260); 145 } else { 146 phy_write(phydev, 0x17, 0x2108); 147 phy_write(phydev, 0x0e, 0x0000); 148 } 149 150 return 0; 151 } 152 153 static int rtl8211c_config_init(struct phy_device *phydev) 154 { 155 /* RTL8211C has an issue when operating in Gigabit slave mode */ 156 phy_set_bits(phydev, MII_CTRL1000, 157 CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER); 158 159 return genphy_config_init(phydev); 160 } 161 162 static int rtl8211f_config_init(struct phy_device *phydev) 163 { 164 int ret; 165 u16 val = 0; 166 167 ret = genphy_config_init(phydev); 168 if (ret < 0) 169 return ret; 170 171 /* enable TX-delay for rgmii-id and rgmii-txid, otherwise disable it */ 172 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 173 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 174 val = RTL8211F_TX_DELAY; 175 176 return phy_modify_paged(phydev, 0xd08, 0x11, RTL8211F_TX_DELAY, val); 177 } 178 179 static int rtl8211b_suspend(struct phy_device *phydev) 180 { 181 phy_write(phydev, MII_MMD_DATA, BIT(9)); 182 183 return genphy_suspend(phydev); 184 } 185 186 static int rtl8211b_resume(struct phy_device *phydev) 187 { 188 phy_write(phydev, MII_MMD_DATA, 0); 189 190 return genphy_resume(phydev); 191 } 192 193 static struct phy_driver realtek_drvs[] = { 194 { 195 .phy_id = 0x00008201, 196 .name = "RTL8201CP Ethernet", 197 .phy_id_mask = 0x0000ffff, 198 .features = PHY_BASIC_FEATURES, 199 .flags = PHY_HAS_INTERRUPT, 200 }, { 201 .phy_id = 0x001cc816, 202 .name = "RTL8201F 10/100Mbps Ethernet", 203 .phy_id_mask = 0x001fffff, 204 .features = PHY_BASIC_FEATURES, 205 .flags = PHY_HAS_INTERRUPT, 206 .ack_interrupt = &rtl8201_ack_interrupt, 207 .config_intr = &rtl8201_config_intr, 208 .suspend = genphy_suspend, 209 .resume = genphy_resume, 210 .read_page = rtl821x_read_page, 211 .write_page = rtl821x_write_page, 212 }, { 213 .phy_id = 0x001cc910, 214 .name = "RTL8211 Gigabit Ethernet", 215 .phy_id_mask = 0x001fffff, 216 .features = PHY_GBIT_FEATURES, 217 .config_aneg = rtl8211_config_aneg, 218 .read_mmd = &genphy_read_mmd_unsupported, 219 .write_mmd = &genphy_write_mmd_unsupported, 220 }, { 221 .phy_id = 0x001cc912, 222 .name = "RTL8211B Gigabit Ethernet", 223 .phy_id_mask = 0x001fffff, 224 .features = PHY_GBIT_FEATURES, 225 .flags = PHY_HAS_INTERRUPT, 226 .ack_interrupt = &rtl821x_ack_interrupt, 227 .config_intr = &rtl8211b_config_intr, 228 .read_mmd = &genphy_read_mmd_unsupported, 229 .write_mmd = &genphy_write_mmd_unsupported, 230 .suspend = rtl8211b_suspend, 231 .resume = rtl8211b_resume, 232 }, { 233 .phy_id = 0x001cc913, 234 .name = "RTL8211C Gigabit Ethernet", 235 .phy_id_mask = 0x001fffff, 236 .features = PHY_GBIT_FEATURES, 237 .config_init = rtl8211c_config_init, 238 .read_mmd = &genphy_read_mmd_unsupported, 239 .write_mmd = &genphy_write_mmd_unsupported, 240 }, { 241 .phy_id = 0x001cc914, 242 .name = "RTL8211DN Gigabit Ethernet", 243 .phy_id_mask = 0x001fffff, 244 .features = PHY_GBIT_FEATURES, 245 .flags = PHY_HAS_INTERRUPT, 246 .ack_interrupt = rtl821x_ack_interrupt, 247 .config_intr = rtl8211e_config_intr, 248 .suspend = genphy_suspend, 249 .resume = genphy_resume, 250 }, { 251 .phy_id = 0x001cc915, 252 .name = "RTL8211E Gigabit Ethernet", 253 .phy_id_mask = 0x001fffff, 254 .features = PHY_GBIT_FEATURES, 255 .flags = PHY_HAS_INTERRUPT, 256 .ack_interrupt = &rtl821x_ack_interrupt, 257 .config_intr = &rtl8211e_config_intr, 258 .suspend = genphy_suspend, 259 .resume = genphy_resume, 260 }, { 261 .phy_id = 0x001cc916, 262 .name = "RTL8211F Gigabit Ethernet", 263 .phy_id_mask = 0x001fffff, 264 .features = PHY_GBIT_FEATURES, 265 .flags = PHY_HAS_INTERRUPT, 266 .config_init = &rtl8211f_config_init, 267 .ack_interrupt = &rtl8211f_ack_interrupt, 268 .config_intr = &rtl8211f_config_intr, 269 .suspend = genphy_suspend, 270 .resume = genphy_resume, 271 .read_page = rtl821x_read_page, 272 .write_page = rtl821x_write_page, 273 }, 274 }; 275 276 module_phy_driver(realtek_drvs); 277 278 static struct mdio_device_id __maybe_unused realtek_tbl[] = { 279 { 0x001cc816, 0x001fffff }, 280 { 0x001cc910, 0x001fffff }, 281 { 0x001cc912, 0x001fffff }, 282 { 0x001cc914, 0x001fffff }, 283 { 0x001cc915, 0x001fffff }, 284 { 0x001cc916, 0x001fffff }, 285 { } 286 }; 287 288 MODULE_DEVICE_TABLE(mdio, realtek_tbl); 289