1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for the Texas Instruments DP83867 PHY 4 * 5 * Copyright (C) 2015 Texas Instruments Inc. 6 */ 7 8 #include <linux/ethtool.h> 9 #include <linux/kernel.h> 10 #include <linux/mii.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/phy.h> 14 #include <linux/delay.h> 15 #include <linux/netdevice.h> 16 #include <linux/etherdevice.h> 17 #include <linux/bitfield.h> 18 19 #include <dt-bindings/net/ti-dp83867.h> 20 21 #define DP83867_PHY_ID 0x2000a231 22 #define DP83867_DEVADDR 0x1f 23 24 #define MII_DP83867_PHYCTRL 0x10 25 #define MII_DP83867_PHYSTS 0x11 26 #define MII_DP83867_MICR 0x12 27 #define MII_DP83867_ISR 0x13 28 #define DP83867_CFG2 0x14 29 #define DP83867_CFG3 0x1e 30 #define DP83867_CTRL 0x1f 31 32 /* Extended Registers */ 33 #define DP83867_FLD_THR_CFG 0x002e 34 #define DP83867_CFG4 0x0031 35 #define DP83867_CFG4_SGMII_ANEG_MASK (BIT(5) | BIT(6)) 36 #define DP83867_CFG4_SGMII_ANEG_TIMER_11MS (3 << 5) 37 #define DP83867_CFG4_SGMII_ANEG_TIMER_800US (2 << 5) 38 #define DP83867_CFG4_SGMII_ANEG_TIMER_2US (1 << 5) 39 #define DP83867_CFG4_SGMII_ANEG_TIMER_16MS (0 << 5) 40 41 #define DP83867_RGMIICTL 0x0032 42 #define DP83867_STRAP_STS1 0x006E 43 #define DP83867_STRAP_STS2 0x006f 44 #define DP83867_RGMIIDCTL 0x0086 45 #define DP83867_RXFCFG 0x0134 46 #define DP83867_RXFPMD1 0x0136 47 #define DP83867_RXFPMD2 0x0137 48 #define DP83867_RXFPMD3 0x0138 49 #define DP83867_RXFSOP1 0x0139 50 #define DP83867_RXFSOP2 0x013A 51 #define DP83867_RXFSOP3 0x013B 52 #define DP83867_IO_MUX_CFG 0x0170 53 #define DP83867_SGMIICTL 0x00D3 54 #define DP83867_10M_SGMII_CFG 0x016F 55 #define DP83867_10M_SGMII_RATE_ADAPT_MASK BIT(7) 56 57 #define DP83867_SW_RESET BIT(15) 58 #define DP83867_SW_RESTART BIT(14) 59 60 /* MICR Interrupt bits */ 61 #define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15) 62 #define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14) 63 #define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13) 64 #define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12) 65 #define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11) 66 #define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10) 67 #define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8) 68 #define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4) 69 #define MII_DP83867_MICR_WOL_INT_EN BIT(3) 70 #define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2) 71 #define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1) 72 #define MII_DP83867_MICR_JABBER_INT_EN BIT(0) 73 74 /* RGMIICTL bits */ 75 #define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1) 76 #define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0) 77 78 /* SGMIICTL bits */ 79 #define DP83867_SGMII_TYPE BIT(14) 80 81 /* RXFCFG bits*/ 82 #define DP83867_WOL_MAGIC_EN BIT(0) 83 #define DP83867_WOL_BCAST_EN BIT(2) 84 #define DP83867_WOL_UCAST_EN BIT(4) 85 #define DP83867_WOL_SEC_EN BIT(5) 86 #define DP83867_WOL_ENH_MAC BIT(7) 87 88 /* STRAP_STS1 bits */ 89 #define DP83867_STRAP_STS1_RESERVED BIT(11) 90 91 /* STRAP_STS2 bits */ 92 #define DP83867_STRAP_STS2_CLK_SKEW_TX_MASK GENMASK(6, 4) 93 #define DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT 4 94 #define DP83867_STRAP_STS2_CLK_SKEW_RX_MASK GENMASK(2, 0) 95 #define DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT 0 96 #define DP83867_STRAP_STS2_CLK_SKEW_NONE BIT(2) 97 #define DP83867_STRAP_STS2_STRAP_FLD BIT(10) 98 99 /* PHY CTRL bits */ 100 #define DP83867_PHYCR_TX_FIFO_DEPTH_SHIFT 14 101 #define DP83867_PHYCR_RX_FIFO_DEPTH_SHIFT 12 102 #define DP83867_PHYCR_FIFO_DEPTH_MAX 0x03 103 #define DP83867_PHYCR_TX_FIFO_DEPTH_MASK GENMASK(15, 14) 104 #define DP83867_PHYCR_RX_FIFO_DEPTH_MASK GENMASK(13, 12) 105 #define DP83867_PHYCR_RESERVED_MASK BIT(11) 106 #define DP83867_PHYCR_FORCE_LINK_GOOD BIT(10) 107 108 /* RGMIIDCTL bits */ 109 #define DP83867_RGMII_TX_CLK_DELAY_MAX 0xf 110 #define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4 111 #define DP83867_RGMII_TX_CLK_DELAY_INV (DP83867_RGMII_TX_CLK_DELAY_MAX + 1) 112 #define DP83867_RGMII_RX_CLK_DELAY_MAX 0xf 113 #define DP83867_RGMII_RX_CLK_DELAY_SHIFT 0 114 #define DP83867_RGMII_RX_CLK_DELAY_INV (DP83867_RGMII_RX_CLK_DELAY_MAX + 1) 115 116 117 /* IO_MUX_CFG bits */ 118 #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK 0x1f 119 #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0 120 #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f 121 #define DP83867_IO_MUX_CFG_CLK_O_DISABLE BIT(6) 122 #define DP83867_IO_MUX_CFG_CLK_O_SEL_MASK (0x1f << 8) 123 #define DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT 8 124 125 /* PHY STS bits */ 126 #define DP83867_PHYSTS_1000 BIT(15) 127 #define DP83867_PHYSTS_100 BIT(14) 128 #define DP83867_PHYSTS_DUPLEX BIT(13) 129 #define DP83867_PHYSTS_LINK BIT(10) 130 131 /* CFG2 bits */ 132 #define DP83867_DOWNSHIFT_EN (BIT(8) | BIT(9)) 133 #define DP83867_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11)) 134 #define DP83867_DOWNSHIFT_1_COUNT_VAL 0 135 #define DP83867_DOWNSHIFT_2_COUNT_VAL 1 136 #define DP83867_DOWNSHIFT_4_COUNT_VAL 2 137 #define DP83867_DOWNSHIFT_8_COUNT_VAL 3 138 #define DP83867_DOWNSHIFT_1_COUNT 1 139 #define DP83867_DOWNSHIFT_2_COUNT 2 140 #define DP83867_DOWNSHIFT_4_COUNT 4 141 #define DP83867_DOWNSHIFT_8_COUNT 8 142 143 /* CFG3 bits */ 144 #define DP83867_CFG3_INT_OE BIT(7) 145 #define DP83867_CFG3_ROBUST_AUTO_MDIX BIT(9) 146 147 /* CFG4 bits */ 148 #define DP83867_CFG4_PORT_MIRROR_EN BIT(0) 149 150 /* FLD_THR_CFG */ 151 #define DP83867_FLD_THR_CFG_ENERGY_LOST_THR_MASK 0x7 152 153 enum { 154 DP83867_PORT_MIRROING_KEEP, 155 DP83867_PORT_MIRROING_EN, 156 DP83867_PORT_MIRROING_DIS, 157 }; 158 159 struct dp83867_private { 160 u32 rx_id_delay; 161 u32 tx_id_delay; 162 u32 tx_fifo_depth; 163 u32 rx_fifo_depth; 164 int io_impedance; 165 int port_mirroring; 166 bool rxctrl_strap_quirk; 167 bool set_clk_output; 168 u32 clk_output_sel; 169 bool sgmii_ref_clk_en; 170 }; 171 172 static int dp83867_ack_interrupt(struct phy_device *phydev) 173 { 174 int err = phy_read(phydev, MII_DP83867_ISR); 175 176 if (err < 0) 177 return err; 178 179 return 0; 180 } 181 182 static int dp83867_set_wol(struct phy_device *phydev, 183 struct ethtool_wolinfo *wol) 184 { 185 struct net_device *ndev = phydev->attached_dev; 186 u16 val_rxcfg, val_micr; 187 u8 *mac; 188 189 val_rxcfg = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG); 190 val_micr = phy_read(phydev, MII_DP83867_MICR); 191 192 if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST | 193 WAKE_BCAST)) { 194 val_rxcfg |= DP83867_WOL_ENH_MAC; 195 val_micr |= MII_DP83867_MICR_WOL_INT_EN; 196 197 if (wol->wolopts & WAKE_MAGIC) { 198 mac = (u8 *)ndev->dev_addr; 199 200 if (!is_valid_ether_addr(mac)) 201 return -EINVAL; 202 203 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD1, 204 (mac[1] << 8 | mac[0])); 205 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD2, 206 (mac[3] << 8 | mac[2])); 207 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD3, 208 (mac[5] << 8 | mac[4])); 209 210 val_rxcfg |= DP83867_WOL_MAGIC_EN; 211 } else { 212 val_rxcfg &= ~DP83867_WOL_MAGIC_EN; 213 } 214 215 if (wol->wolopts & WAKE_MAGICSECURE) { 216 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1, 217 (wol->sopass[1] << 8) | wol->sopass[0]); 218 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1, 219 (wol->sopass[3] << 8) | wol->sopass[2]); 220 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1, 221 (wol->sopass[5] << 8) | wol->sopass[4]); 222 223 val_rxcfg |= DP83867_WOL_SEC_EN; 224 } else { 225 val_rxcfg &= ~DP83867_WOL_SEC_EN; 226 } 227 228 if (wol->wolopts & WAKE_UCAST) 229 val_rxcfg |= DP83867_WOL_UCAST_EN; 230 else 231 val_rxcfg &= ~DP83867_WOL_UCAST_EN; 232 233 if (wol->wolopts & WAKE_BCAST) 234 val_rxcfg |= DP83867_WOL_BCAST_EN; 235 else 236 val_rxcfg &= ~DP83867_WOL_BCAST_EN; 237 } else { 238 val_rxcfg &= ~DP83867_WOL_ENH_MAC; 239 val_micr &= ~MII_DP83867_MICR_WOL_INT_EN; 240 } 241 242 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG, val_rxcfg); 243 phy_write(phydev, MII_DP83867_MICR, val_micr); 244 245 return 0; 246 } 247 248 static void dp83867_get_wol(struct phy_device *phydev, 249 struct ethtool_wolinfo *wol) 250 { 251 u16 value, sopass_val; 252 253 wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC | 254 WAKE_MAGICSECURE); 255 wol->wolopts = 0; 256 257 value = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG); 258 259 if (value & DP83867_WOL_UCAST_EN) 260 wol->wolopts |= WAKE_UCAST; 261 262 if (value & DP83867_WOL_BCAST_EN) 263 wol->wolopts |= WAKE_BCAST; 264 265 if (value & DP83867_WOL_MAGIC_EN) 266 wol->wolopts |= WAKE_MAGIC; 267 268 if (value & DP83867_WOL_SEC_EN) { 269 sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR, 270 DP83867_RXFSOP1); 271 wol->sopass[0] = (sopass_val & 0xff); 272 wol->sopass[1] = (sopass_val >> 8); 273 274 sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR, 275 DP83867_RXFSOP2); 276 wol->sopass[2] = (sopass_val & 0xff); 277 wol->sopass[3] = (sopass_val >> 8); 278 279 sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR, 280 DP83867_RXFSOP3); 281 wol->sopass[4] = (sopass_val & 0xff); 282 wol->sopass[5] = (sopass_val >> 8); 283 284 wol->wolopts |= WAKE_MAGICSECURE; 285 } 286 287 if (!(value & DP83867_WOL_ENH_MAC)) 288 wol->wolopts = 0; 289 } 290 291 static int dp83867_config_intr(struct phy_device *phydev) 292 { 293 int micr_status; 294 295 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { 296 micr_status = phy_read(phydev, MII_DP83867_MICR); 297 if (micr_status < 0) 298 return micr_status; 299 300 micr_status |= 301 (MII_DP83867_MICR_AN_ERR_INT_EN | 302 MII_DP83867_MICR_SPEED_CHNG_INT_EN | 303 MII_DP83867_MICR_AUTONEG_COMP_INT_EN | 304 MII_DP83867_MICR_LINK_STS_CHNG_INT_EN | 305 MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN | 306 MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN); 307 308 return phy_write(phydev, MII_DP83867_MICR, micr_status); 309 } 310 311 micr_status = 0x0; 312 return phy_write(phydev, MII_DP83867_MICR, micr_status); 313 } 314 315 static int dp83867_read_status(struct phy_device *phydev) 316 { 317 int status = phy_read(phydev, MII_DP83867_PHYSTS); 318 int ret; 319 320 ret = genphy_read_status(phydev); 321 if (ret) 322 return ret; 323 324 if (status < 0) 325 return status; 326 327 if (status & DP83867_PHYSTS_DUPLEX) 328 phydev->duplex = DUPLEX_FULL; 329 else 330 phydev->duplex = DUPLEX_HALF; 331 332 if (status & DP83867_PHYSTS_1000) 333 phydev->speed = SPEED_1000; 334 else if (status & DP83867_PHYSTS_100) 335 phydev->speed = SPEED_100; 336 else 337 phydev->speed = SPEED_10; 338 339 return 0; 340 } 341 342 static int dp83867_get_downshift(struct phy_device *phydev, u8 *data) 343 { 344 int val, cnt, enable, count; 345 346 val = phy_read(phydev, DP83867_CFG2); 347 if (val < 0) 348 return val; 349 350 enable = FIELD_GET(DP83867_DOWNSHIFT_EN, val); 351 cnt = FIELD_GET(DP83867_DOWNSHIFT_ATTEMPT_MASK, val); 352 353 switch (cnt) { 354 case DP83867_DOWNSHIFT_1_COUNT_VAL: 355 count = DP83867_DOWNSHIFT_1_COUNT; 356 break; 357 case DP83867_DOWNSHIFT_2_COUNT_VAL: 358 count = DP83867_DOWNSHIFT_2_COUNT; 359 break; 360 case DP83867_DOWNSHIFT_4_COUNT_VAL: 361 count = DP83867_DOWNSHIFT_4_COUNT; 362 break; 363 case DP83867_DOWNSHIFT_8_COUNT_VAL: 364 count = DP83867_DOWNSHIFT_8_COUNT; 365 break; 366 default: 367 return -EINVAL; 368 }; 369 370 *data = enable ? count : DOWNSHIFT_DEV_DISABLE; 371 372 return 0; 373 } 374 375 static int dp83867_set_downshift(struct phy_device *phydev, u8 cnt) 376 { 377 int val, count; 378 379 if (cnt > DP83867_DOWNSHIFT_8_COUNT) 380 return -E2BIG; 381 382 if (!cnt) 383 return phy_clear_bits(phydev, DP83867_CFG2, 384 DP83867_DOWNSHIFT_EN); 385 386 switch (cnt) { 387 case DP83867_DOWNSHIFT_1_COUNT: 388 count = DP83867_DOWNSHIFT_1_COUNT_VAL; 389 break; 390 case DP83867_DOWNSHIFT_2_COUNT: 391 count = DP83867_DOWNSHIFT_2_COUNT_VAL; 392 break; 393 case DP83867_DOWNSHIFT_4_COUNT: 394 count = DP83867_DOWNSHIFT_4_COUNT_VAL; 395 break; 396 case DP83867_DOWNSHIFT_8_COUNT: 397 count = DP83867_DOWNSHIFT_8_COUNT_VAL; 398 break; 399 default: 400 phydev_err(phydev, 401 "Downshift count must be 1, 2, 4 or 8\n"); 402 return -EINVAL; 403 }; 404 405 val = DP83867_DOWNSHIFT_EN; 406 val |= FIELD_PREP(DP83867_DOWNSHIFT_ATTEMPT_MASK, count); 407 408 return phy_modify(phydev, DP83867_CFG2, 409 DP83867_DOWNSHIFT_EN | DP83867_DOWNSHIFT_ATTEMPT_MASK, 410 val); 411 } 412 413 static int dp83867_get_tunable(struct phy_device *phydev, 414 struct ethtool_tunable *tuna, void *data) 415 { 416 switch (tuna->id) { 417 case ETHTOOL_PHY_DOWNSHIFT: 418 return dp83867_get_downshift(phydev, data); 419 default: 420 return -EOPNOTSUPP; 421 } 422 } 423 424 static int dp83867_set_tunable(struct phy_device *phydev, 425 struct ethtool_tunable *tuna, const void *data) 426 { 427 switch (tuna->id) { 428 case ETHTOOL_PHY_DOWNSHIFT: 429 return dp83867_set_downshift(phydev, *(const u8 *)data); 430 default: 431 return -EOPNOTSUPP; 432 } 433 } 434 435 static int dp83867_config_port_mirroring(struct phy_device *phydev) 436 { 437 struct dp83867_private *dp83867 = 438 (struct dp83867_private *)phydev->priv; 439 440 if (dp83867->port_mirroring == DP83867_PORT_MIRROING_EN) 441 phy_set_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, 442 DP83867_CFG4_PORT_MIRROR_EN); 443 else 444 phy_clear_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, 445 DP83867_CFG4_PORT_MIRROR_EN); 446 return 0; 447 } 448 449 static int dp83867_verify_rgmii_cfg(struct phy_device *phydev) 450 { 451 struct dp83867_private *dp83867 = phydev->priv; 452 453 /* Existing behavior was to use default pin strapping delay in rgmii 454 * mode, but rgmii should have meant no delay. Warn existing users. 455 */ 456 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) { 457 const u16 val = phy_read_mmd(phydev, DP83867_DEVADDR, 458 DP83867_STRAP_STS2); 459 const u16 txskew = (val & DP83867_STRAP_STS2_CLK_SKEW_TX_MASK) >> 460 DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT; 461 const u16 rxskew = (val & DP83867_STRAP_STS2_CLK_SKEW_RX_MASK) >> 462 DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT; 463 464 if (txskew != DP83867_STRAP_STS2_CLK_SKEW_NONE || 465 rxskew != DP83867_STRAP_STS2_CLK_SKEW_NONE) 466 phydev_warn(phydev, 467 "PHY has delays via pin strapping, but phy-mode = 'rgmii'\n" 468 "Should be 'rgmii-id' to use internal delays txskew:%x rxskew:%x\n", 469 txskew, rxskew); 470 } 471 472 /* RX delay *must* be specified if internal delay of RX is used. */ 473 if ((phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 474 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) && 475 dp83867->rx_id_delay == DP83867_RGMII_RX_CLK_DELAY_INV) { 476 phydev_err(phydev, "ti,rx-internal-delay must be specified\n"); 477 return -EINVAL; 478 } 479 480 /* TX delay *must* be specified if internal delay of TX is used. */ 481 if ((phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 482 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) && 483 dp83867->tx_id_delay == DP83867_RGMII_TX_CLK_DELAY_INV) { 484 phydev_err(phydev, "ti,tx-internal-delay must be specified\n"); 485 return -EINVAL; 486 } 487 488 return 0; 489 } 490 491 #ifdef CONFIG_OF_MDIO 492 static int dp83867_of_init(struct phy_device *phydev) 493 { 494 struct dp83867_private *dp83867 = phydev->priv; 495 struct device *dev = &phydev->mdio.dev; 496 struct device_node *of_node = dev->of_node; 497 int ret; 498 499 if (!of_node) 500 return -ENODEV; 501 502 /* Optional configuration */ 503 ret = of_property_read_u32(of_node, "ti,clk-output-sel", 504 &dp83867->clk_output_sel); 505 /* If not set, keep default */ 506 if (!ret) { 507 dp83867->set_clk_output = true; 508 /* Valid values are 0 to DP83867_CLK_O_SEL_REF_CLK or 509 * DP83867_CLK_O_SEL_OFF. 510 */ 511 if (dp83867->clk_output_sel > DP83867_CLK_O_SEL_REF_CLK && 512 dp83867->clk_output_sel != DP83867_CLK_O_SEL_OFF) { 513 phydev_err(phydev, "ti,clk-output-sel value %u out of range\n", 514 dp83867->clk_output_sel); 515 return -EINVAL; 516 } 517 } 518 519 if (of_property_read_bool(of_node, "ti,max-output-impedance")) 520 dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX; 521 else if (of_property_read_bool(of_node, "ti,min-output-impedance")) 522 dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN; 523 else 524 dp83867->io_impedance = -1; /* leave at default */ 525 526 dp83867->rxctrl_strap_quirk = of_property_read_bool(of_node, 527 "ti,dp83867-rxctrl-strap-quirk"); 528 529 dp83867->sgmii_ref_clk_en = of_property_read_bool(of_node, 530 "ti,sgmii-ref-clock-output-enable"); 531 532 533 dp83867->rx_id_delay = DP83867_RGMII_RX_CLK_DELAY_INV; 534 ret = of_property_read_u32(of_node, "ti,rx-internal-delay", 535 &dp83867->rx_id_delay); 536 if (!ret && dp83867->rx_id_delay > DP83867_RGMII_RX_CLK_DELAY_MAX) { 537 phydev_err(phydev, 538 "ti,rx-internal-delay value of %u out of range\n", 539 dp83867->rx_id_delay); 540 return -EINVAL; 541 } 542 543 dp83867->tx_id_delay = DP83867_RGMII_TX_CLK_DELAY_INV; 544 ret = of_property_read_u32(of_node, "ti,tx-internal-delay", 545 &dp83867->tx_id_delay); 546 if (!ret && dp83867->tx_id_delay > DP83867_RGMII_TX_CLK_DELAY_MAX) { 547 phydev_err(phydev, 548 "ti,tx-internal-delay value of %u out of range\n", 549 dp83867->tx_id_delay); 550 return -EINVAL; 551 } 552 553 if (of_property_read_bool(of_node, "enet-phy-lane-swap")) 554 dp83867->port_mirroring = DP83867_PORT_MIRROING_EN; 555 556 if (of_property_read_bool(of_node, "enet-phy-lane-no-swap")) 557 dp83867->port_mirroring = DP83867_PORT_MIRROING_DIS; 558 559 ret = of_property_read_u32(of_node, "ti,fifo-depth", 560 &dp83867->tx_fifo_depth); 561 if (ret) { 562 ret = of_property_read_u32(of_node, "tx-fifo-depth", 563 &dp83867->tx_fifo_depth); 564 if (ret) 565 dp83867->tx_fifo_depth = 566 DP83867_PHYCR_FIFO_DEPTH_4_B_NIB; 567 } 568 569 if (dp83867->tx_fifo_depth > DP83867_PHYCR_FIFO_DEPTH_MAX) { 570 phydev_err(phydev, "tx-fifo-depth value %u out of range\n", 571 dp83867->tx_fifo_depth); 572 return -EINVAL; 573 } 574 575 ret = of_property_read_u32(of_node, "rx-fifo-depth", 576 &dp83867->rx_fifo_depth); 577 if (ret) 578 dp83867->rx_fifo_depth = DP83867_PHYCR_FIFO_DEPTH_4_B_NIB; 579 580 if (dp83867->rx_fifo_depth > DP83867_PHYCR_FIFO_DEPTH_MAX) { 581 phydev_err(phydev, "rx-fifo-depth value %u out of range\n", 582 dp83867->rx_fifo_depth); 583 return -EINVAL; 584 } 585 586 return 0; 587 } 588 #else 589 static int dp83867_of_init(struct phy_device *phydev) 590 { 591 return 0; 592 } 593 #endif /* CONFIG_OF_MDIO */ 594 595 static int dp83867_probe(struct phy_device *phydev) 596 { 597 struct dp83867_private *dp83867; 598 599 dp83867 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83867), 600 GFP_KERNEL); 601 if (!dp83867) 602 return -ENOMEM; 603 604 phydev->priv = dp83867; 605 606 return dp83867_of_init(phydev); 607 } 608 609 static int dp83867_config_init(struct phy_device *phydev) 610 { 611 struct dp83867_private *dp83867 = phydev->priv; 612 int ret, val, bs; 613 u16 delay; 614 615 /* Force speed optimization for the PHY even if it strapped */ 616 ret = phy_modify(phydev, DP83867_CFG2, DP83867_DOWNSHIFT_EN, 617 DP83867_DOWNSHIFT_EN); 618 if (ret) 619 return ret; 620 621 ret = dp83867_verify_rgmii_cfg(phydev); 622 if (ret) 623 return ret; 624 625 /* RX_DV/RX_CTRL strapped in mode 1 or mode 2 workaround */ 626 if (dp83867->rxctrl_strap_quirk) 627 phy_clear_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, 628 BIT(7)); 629 630 bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS2); 631 if (bs & DP83867_STRAP_STS2_STRAP_FLD) { 632 /* When using strap to enable FLD, the ENERGY_LOST_FLD_THR will 633 * be set to 0x2. This may causes the PHY link to be unstable - 634 * the default value 0x1 need to be restored. 635 */ 636 ret = phy_modify_mmd(phydev, DP83867_DEVADDR, 637 DP83867_FLD_THR_CFG, 638 DP83867_FLD_THR_CFG_ENERGY_LOST_THR_MASK, 639 0x1); 640 if (ret) 641 return ret; 642 } 643 644 if (phy_interface_is_rgmii(phydev) || 645 phydev->interface == PHY_INTERFACE_MODE_SGMII) { 646 val = phy_read(phydev, MII_DP83867_PHYCTRL); 647 if (val < 0) 648 return val; 649 650 val &= ~DP83867_PHYCR_TX_FIFO_DEPTH_MASK; 651 val |= (dp83867->tx_fifo_depth << 652 DP83867_PHYCR_TX_FIFO_DEPTH_SHIFT); 653 654 if (phydev->interface == PHY_INTERFACE_MODE_SGMII) { 655 val &= ~DP83867_PHYCR_RX_FIFO_DEPTH_MASK; 656 val |= (dp83867->rx_fifo_depth << 657 DP83867_PHYCR_RX_FIFO_DEPTH_SHIFT); 658 } 659 660 ret = phy_write(phydev, MII_DP83867_PHYCTRL, val); 661 if (ret) 662 return ret; 663 } 664 665 if (phy_interface_is_rgmii(phydev)) { 666 val = phy_read(phydev, MII_DP83867_PHYCTRL); 667 if (val < 0) 668 return val; 669 670 /* The code below checks if "port mirroring" N/A MODE4 has been 671 * enabled during power on bootstrap. 672 * 673 * Such N/A mode enabled by mistake can put PHY IC in some 674 * internal testing mode and disable RGMII transmission. 675 * 676 * In this particular case one needs to check STRAP_STS1 677 * register's bit 11 (marked as RESERVED). 678 */ 679 680 bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS1); 681 if (bs & DP83867_STRAP_STS1_RESERVED) 682 val &= ~DP83867_PHYCR_RESERVED_MASK; 683 684 ret = phy_write(phydev, MII_DP83867_PHYCTRL, val); 685 if (ret) 686 return ret; 687 688 /* If rgmii mode with no internal delay is selected, we do NOT use 689 * aligned mode as one might expect. Instead we use the PHY's default 690 * based on pin strapping. And the "mode 0" default is to *use* 691 * internal delay with a value of 7 (2.00 ns). 692 * 693 * Set up RGMII delays 694 */ 695 val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL); 696 697 val &= ~(DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN); 698 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) 699 val |= (DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN); 700 701 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 702 val |= DP83867_RGMII_TX_CLK_DELAY_EN; 703 704 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 705 val |= DP83867_RGMII_RX_CLK_DELAY_EN; 706 707 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val); 708 709 delay = 0; 710 if (dp83867->rx_id_delay != DP83867_RGMII_RX_CLK_DELAY_INV) 711 delay |= dp83867->rx_id_delay; 712 if (dp83867->tx_id_delay != DP83867_RGMII_TX_CLK_DELAY_INV) 713 delay |= dp83867->tx_id_delay << 714 DP83867_RGMII_TX_CLK_DELAY_SHIFT; 715 716 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIIDCTL, 717 delay); 718 } 719 720 /* If specified, set io impedance */ 721 if (dp83867->io_impedance >= 0) 722 phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, 723 DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK, 724 dp83867->io_impedance); 725 726 if (phydev->interface == PHY_INTERFACE_MODE_SGMII) { 727 /* For support SPEED_10 in SGMII mode 728 * DP83867_10M_SGMII_RATE_ADAPT bit 729 * has to be cleared by software. That 730 * does not affect SPEED_100 and 731 * SPEED_1000. 732 */ 733 ret = phy_modify_mmd(phydev, DP83867_DEVADDR, 734 DP83867_10M_SGMII_CFG, 735 DP83867_10M_SGMII_RATE_ADAPT_MASK, 736 0); 737 if (ret) 738 return ret; 739 740 /* After reset SGMII Autoneg timer is set to 2us (bits 6 and 5 741 * are 01). That is not enough to finalize autoneg on some 742 * devices. Increase this timer duration to maximum 16ms. 743 */ 744 ret = phy_modify_mmd(phydev, DP83867_DEVADDR, 745 DP83867_CFG4, 746 DP83867_CFG4_SGMII_ANEG_MASK, 747 DP83867_CFG4_SGMII_ANEG_TIMER_16MS); 748 749 if (ret) 750 return ret; 751 752 val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL); 753 /* SGMII type is set to 4-wire mode by default. 754 * If we place appropriate property in dts (see above) 755 * switch on 6-wire mode. 756 */ 757 if (dp83867->sgmii_ref_clk_en) 758 val |= DP83867_SGMII_TYPE; 759 else 760 val &= ~DP83867_SGMII_TYPE; 761 phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL, val); 762 } 763 764 val = phy_read(phydev, DP83867_CFG3); 765 /* Enable Interrupt output INT_OE in CFG3 register */ 766 if (phy_interrupt_is_valid(phydev)) 767 val |= DP83867_CFG3_INT_OE; 768 769 val |= DP83867_CFG3_ROBUST_AUTO_MDIX; 770 phy_write(phydev, DP83867_CFG3, val); 771 772 if (dp83867->port_mirroring != DP83867_PORT_MIRROING_KEEP) 773 dp83867_config_port_mirroring(phydev); 774 775 /* Clock output selection if muxing property is set */ 776 if (dp83867->set_clk_output) { 777 u16 mask = DP83867_IO_MUX_CFG_CLK_O_DISABLE; 778 779 if (dp83867->clk_output_sel == DP83867_CLK_O_SEL_OFF) { 780 val = DP83867_IO_MUX_CFG_CLK_O_DISABLE; 781 } else { 782 mask |= DP83867_IO_MUX_CFG_CLK_O_SEL_MASK; 783 val = dp83867->clk_output_sel << 784 DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT; 785 } 786 787 phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, 788 mask, val); 789 } 790 791 return 0; 792 } 793 794 static int dp83867_phy_reset(struct phy_device *phydev) 795 { 796 int err; 797 798 err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESET); 799 if (err < 0) 800 return err; 801 802 usleep_range(10, 20); 803 804 /* After reset FORCE_LINK_GOOD bit is set. Although the 805 * default value should be unset. Disable FORCE_LINK_GOOD 806 * for the phy to work properly. 807 */ 808 return phy_modify(phydev, MII_DP83867_PHYCTRL, 809 DP83867_PHYCR_FORCE_LINK_GOOD, 0); 810 } 811 812 static struct phy_driver dp83867_driver[] = { 813 { 814 .phy_id = DP83867_PHY_ID, 815 .phy_id_mask = 0xfffffff0, 816 .name = "TI DP83867", 817 /* PHY_GBIT_FEATURES */ 818 819 .probe = dp83867_probe, 820 .config_init = dp83867_config_init, 821 .soft_reset = dp83867_phy_reset, 822 823 .read_status = dp83867_read_status, 824 .get_tunable = dp83867_get_tunable, 825 .set_tunable = dp83867_set_tunable, 826 827 .get_wol = dp83867_get_wol, 828 .set_wol = dp83867_set_wol, 829 830 /* IRQ related */ 831 .ack_interrupt = dp83867_ack_interrupt, 832 .config_intr = dp83867_config_intr, 833 834 .suspend = genphy_suspend, 835 .resume = genphy_resume, 836 }, 837 }; 838 module_phy_driver(dp83867_driver); 839 840 static struct mdio_device_id __maybe_unused dp83867_tbl[] = { 841 { DP83867_PHY_ID, 0xfffffff0 }, 842 { } 843 }; 844 845 MODULE_DEVICE_TABLE(mdio, dp83867_tbl); 846 847 MODULE_DESCRIPTION("Texas Instruments DP83867 PHY driver"); 848 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com"); 849 MODULE_LICENSE("GPL v2"); 850