1 /******************************************************************************* 2 3 Intel PRO/1000 Linux driver 4 Copyright(c) 1999 - 2012 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 Linux NICS <linux.nics@intel.com> 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 27 *******************************************************************************/ 28 29 #include "e1000.h" 30 31 static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw); 32 static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw); 33 static s32 e1000_set_d0_lplu_state(struct e1000_hw *hw, bool active); 34 static s32 e1000_wait_autoneg(struct e1000_hw *hw); 35 static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg); 36 static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset, 37 u16 *data, bool read, bool page_set); 38 static u32 e1000_get_phy_addr_for_hv_page(u32 page); 39 static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, 40 u16 *data, bool read); 41 42 /* Cable length tables */ 43 static const u16 e1000_m88_cable_length_table[] = { 44 0, 50, 80, 110, 140, 140, E1000_CABLE_LENGTH_UNDEFINED }; 45 #define M88E1000_CABLE_LENGTH_TABLE_SIZE \ 46 ARRAY_SIZE(e1000_m88_cable_length_table) 47 48 static const u16 e1000_igp_2_cable_length_table[] = { 49 0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 8, 11, 13, 16, 18, 21, 0, 0, 0, 3, 50 6, 10, 13, 16, 19, 23, 26, 29, 32, 35, 38, 41, 6, 10, 14, 18, 22, 51 26, 30, 33, 37, 41, 44, 48, 51, 54, 58, 61, 21, 26, 31, 35, 40, 52 44, 49, 53, 57, 61, 65, 68, 72, 75, 79, 82, 40, 45, 51, 56, 61, 53 66, 70, 75, 79, 83, 87, 91, 94, 98, 101, 104, 60, 66, 72, 77, 82, 54 87, 92, 96, 100, 104, 108, 111, 114, 117, 119, 121, 83, 89, 95, 55 100, 105, 109, 113, 116, 119, 122, 124, 104, 109, 114, 118, 121, 56 124}; 57 #define IGP02E1000_CABLE_LENGTH_TABLE_SIZE \ 58 ARRAY_SIZE(e1000_igp_2_cable_length_table) 59 60 #define BM_PHY_REG_PAGE(offset) \ 61 ((u16)(((offset) >> PHY_PAGE_SHIFT) & 0xFFFF)) 62 #define BM_PHY_REG_NUM(offset) \ 63 ((u16)(((offset) & MAX_PHY_REG_ADDRESS) |\ 64 (((offset) >> (PHY_UPPER_SHIFT - PHY_PAGE_SHIFT)) &\ 65 ~MAX_PHY_REG_ADDRESS))) 66 67 #define HV_INTC_FC_PAGE_START 768 68 #define I82578_ADDR_REG 29 69 #define I82577_ADDR_REG 16 70 #define I82577_CFG_REG 22 71 #define I82577_CFG_ASSERT_CRS_ON_TX (1 << 15) 72 #define I82577_CFG_ENABLE_DOWNSHIFT (3 << 10) /* auto downshift 100/10 */ 73 #define I82577_CTRL_REG 23 74 75 /* 82577 specific PHY registers */ 76 #define I82577_PHY_CTRL_2 18 77 #define I82577_PHY_STATUS_2 26 78 #define I82577_PHY_DIAG_STATUS 31 79 80 /* I82577 PHY Status 2 */ 81 #define I82577_PHY_STATUS2_REV_POLARITY 0x0400 82 #define I82577_PHY_STATUS2_MDIX 0x0800 83 #define I82577_PHY_STATUS2_SPEED_MASK 0x0300 84 #define I82577_PHY_STATUS2_SPEED_1000MBPS 0x0200 85 86 /* I82577 PHY Control 2 */ 87 #define I82577_PHY_CTRL2_AUTO_MDIX 0x0400 88 #define I82577_PHY_CTRL2_FORCE_MDI_MDIX 0x0200 89 90 /* I82577 PHY Diagnostics Status */ 91 #define I82577_DSTATUS_CABLE_LENGTH 0x03FC 92 #define I82577_DSTATUS_CABLE_LENGTH_SHIFT 2 93 94 /* BM PHY Copper Specific Control 1 */ 95 #define BM_CS_CTRL1 16 96 97 #define HV_MUX_DATA_CTRL PHY_REG(776, 16) 98 #define HV_MUX_DATA_CTRL_GEN_TO_MAC 0x0400 99 #define HV_MUX_DATA_CTRL_FORCE_SPEED 0x0004 100 101 /** 102 * e1000e_check_reset_block_generic - Check if PHY reset is blocked 103 * @hw: pointer to the HW structure 104 * 105 * Read the PHY management control register and check whether a PHY reset 106 * is blocked. If a reset is not blocked return 0, otherwise 107 * return E1000_BLK_PHY_RESET (12). 108 **/ 109 s32 e1000e_check_reset_block_generic(struct e1000_hw *hw) 110 { 111 u32 manc; 112 113 manc = er32(MANC); 114 115 return (manc & E1000_MANC_BLK_PHY_RST_ON_IDE) ? 116 E1000_BLK_PHY_RESET : 0; 117 } 118 119 /** 120 * e1000e_get_phy_id - Retrieve the PHY ID and revision 121 * @hw: pointer to the HW structure 122 * 123 * Reads the PHY registers and stores the PHY ID and possibly the PHY 124 * revision in the hardware structure. 125 **/ 126 s32 e1000e_get_phy_id(struct e1000_hw *hw) 127 { 128 struct e1000_phy_info *phy = &hw->phy; 129 s32 ret_val = 0; 130 u16 phy_id; 131 u16 retry_count = 0; 132 133 if (!phy->ops.read_reg) 134 return 0; 135 136 while (retry_count < 2) { 137 ret_val = e1e_rphy(hw, PHY_ID1, &phy_id); 138 if (ret_val) 139 return ret_val; 140 141 phy->id = (u32)(phy_id << 16); 142 udelay(20); 143 ret_val = e1e_rphy(hw, PHY_ID2, &phy_id); 144 if (ret_val) 145 return ret_val; 146 147 phy->id |= (u32)(phy_id & PHY_REVISION_MASK); 148 phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK); 149 150 if (phy->id != 0 && phy->id != PHY_REVISION_MASK) 151 return 0; 152 153 retry_count++; 154 } 155 156 return 0; 157 } 158 159 /** 160 * e1000e_phy_reset_dsp - Reset PHY DSP 161 * @hw: pointer to the HW structure 162 * 163 * Reset the digital signal processor. 164 **/ 165 s32 e1000e_phy_reset_dsp(struct e1000_hw *hw) 166 { 167 s32 ret_val; 168 169 ret_val = e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0xC1); 170 if (ret_val) 171 return ret_val; 172 173 return e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0); 174 } 175 176 /** 177 * e1000e_read_phy_reg_mdic - Read MDI control register 178 * @hw: pointer to the HW structure 179 * @offset: register offset to be read 180 * @data: pointer to the read data 181 * 182 * Reads the MDI control register in the PHY at offset and stores the 183 * information read to data. 184 **/ 185 s32 e1000e_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data) 186 { 187 struct e1000_phy_info *phy = &hw->phy; 188 u32 i, mdic = 0; 189 190 if (offset > MAX_PHY_REG_ADDRESS) { 191 e_dbg("PHY Address %d is out of range\n", offset); 192 return -E1000_ERR_PARAM; 193 } 194 195 /* 196 * Set up Op-code, Phy Address, and register offset in the MDI 197 * Control register. The MAC will take care of interfacing with the 198 * PHY to retrieve the desired data. 199 */ 200 mdic = ((offset << E1000_MDIC_REG_SHIFT) | 201 (phy->addr << E1000_MDIC_PHY_SHIFT) | 202 (E1000_MDIC_OP_READ)); 203 204 ew32(MDIC, mdic); 205 206 /* 207 * Poll the ready bit to see if the MDI read completed 208 * Increasing the time out as testing showed failures with 209 * the lower time out 210 */ 211 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) { 212 udelay(50); 213 mdic = er32(MDIC); 214 if (mdic & E1000_MDIC_READY) 215 break; 216 } 217 if (!(mdic & E1000_MDIC_READY)) { 218 e_dbg("MDI Read did not complete\n"); 219 return -E1000_ERR_PHY; 220 } 221 if (mdic & E1000_MDIC_ERROR) { 222 e_dbg("MDI Error\n"); 223 return -E1000_ERR_PHY; 224 } 225 *data = (u16) mdic; 226 227 /* 228 * Allow some time after each MDIC transaction to avoid 229 * reading duplicate data in the next MDIC transaction. 230 */ 231 if (hw->mac.type == e1000_pch2lan) 232 udelay(100); 233 234 return 0; 235 } 236 237 /** 238 * e1000e_write_phy_reg_mdic - Write MDI control register 239 * @hw: pointer to the HW structure 240 * @offset: register offset to write to 241 * @data: data to write to register at offset 242 * 243 * Writes data to MDI control register in the PHY at offset. 244 **/ 245 s32 e1000e_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data) 246 { 247 struct e1000_phy_info *phy = &hw->phy; 248 u32 i, mdic = 0; 249 250 if (offset > MAX_PHY_REG_ADDRESS) { 251 e_dbg("PHY Address %d is out of range\n", offset); 252 return -E1000_ERR_PARAM; 253 } 254 255 /* 256 * Set up Op-code, Phy Address, and register offset in the MDI 257 * Control register. The MAC will take care of interfacing with the 258 * PHY to retrieve the desired data. 259 */ 260 mdic = (((u32)data) | 261 (offset << E1000_MDIC_REG_SHIFT) | 262 (phy->addr << E1000_MDIC_PHY_SHIFT) | 263 (E1000_MDIC_OP_WRITE)); 264 265 ew32(MDIC, mdic); 266 267 /* 268 * Poll the ready bit to see if the MDI read completed 269 * Increasing the time out as testing showed failures with 270 * the lower time out 271 */ 272 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) { 273 udelay(50); 274 mdic = er32(MDIC); 275 if (mdic & E1000_MDIC_READY) 276 break; 277 } 278 if (!(mdic & E1000_MDIC_READY)) { 279 e_dbg("MDI Write did not complete\n"); 280 return -E1000_ERR_PHY; 281 } 282 if (mdic & E1000_MDIC_ERROR) { 283 e_dbg("MDI Error\n"); 284 return -E1000_ERR_PHY; 285 } 286 287 /* 288 * Allow some time after each MDIC transaction to avoid 289 * reading duplicate data in the next MDIC transaction. 290 */ 291 if (hw->mac.type == e1000_pch2lan) 292 udelay(100); 293 294 return 0; 295 } 296 297 /** 298 * e1000e_read_phy_reg_m88 - Read m88 PHY register 299 * @hw: pointer to the HW structure 300 * @offset: register offset to be read 301 * @data: pointer to the read data 302 * 303 * Acquires semaphore, if necessary, then reads the PHY register at offset 304 * and storing the retrieved information in data. Release any acquired 305 * semaphores before exiting. 306 **/ 307 s32 e1000e_read_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 *data) 308 { 309 s32 ret_val; 310 311 ret_val = hw->phy.ops.acquire(hw); 312 if (ret_val) 313 return ret_val; 314 315 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 316 data); 317 318 hw->phy.ops.release(hw); 319 320 return ret_val; 321 } 322 323 /** 324 * e1000e_write_phy_reg_m88 - Write m88 PHY register 325 * @hw: pointer to the HW structure 326 * @offset: register offset to write to 327 * @data: data to write at register offset 328 * 329 * Acquires semaphore, if necessary, then writes the data to PHY register 330 * at the offset. Release any acquired semaphores before exiting. 331 **/ 332 s32 e1000e_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data) 333 { 334 s32 ret_val; 335 336 ret_val = hw->phy.ops.acquire(hw); 337 if (ret_val) 338 return ret_val; 339 340 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 341 data); 342 343 hw->phy.ops.release(hw); 344 345 return ret_val; 346 } 347 348 /** 349 * e1000_set_page_igp - Set page as on IGP-like PHY(s) 350 * @hw: pointer to the HW structure 351 * @page: page to set (shifted left when necessary) 352 * 353 * Sets PHY page required for PHY register access. Assumes semaphore is 354 * already acquired. Note, this function sets phy.addr to 1 so the caller 355 * must set it appropriately (if necessary) after this function returns. 356 **/ 357 s32 e1000_set_page_igp(struct e1000_hw *hw, u16 page) 358 { 359 e_dbg("Setting page 0x%x\n", page); 360 361 hw->phy.addr = 1; 362 363 return e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, page); 364 } 365 366 /** 367 * __e1000e_read_phy_reg_igp - Read igp PHY register 368 * @hw: pointer to the HW structure 369 * @offset: register offset to be read 370 * @data: pointer to the read data 371 * @locked: semaphore has already been acquired or not 372 * 373 * Acquires semaphore, if necessary, then reads the PHY register at offset 374 * and stores the retrieved information in data. Release any acquired 375 * semaphores before exiting. 376 **/ 377 static s32 __e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data, 378 bool locked) 379 { 380 s32 ret_val = 0; 381 382 if (!locked) { 383 if (!hw->phy.ops.acquire) 384 return 0; 385 386 ret_val = hw->phy.ops.acquire(hw); 387 if (ret_val) 388 return ret_val; 389 } 390 391 if (offset > MAX_PHY_MULTI_PAGE_REG) 392 ret_val = e1000e_write_phy_reg_mdic(hw, 393 IGP01E1000_PHY_PAGE_SELECT, 394 (u16)offset); 395 if (!ret_val) 396 ret_val = e1000e_read_phy_reg_mdic(hw, 397 MAX_PHY_REG_ADDRESS & offset, 398 data); 399 if (!locked) 400 hw->phy.ops.release(hw); 401 402 return ret_val; 403 } 404 405 /** 406 * e1000e_read_phy_reg_igp - Read igp PHY register 407 * @hw: pointer to the HW structure 408 * @offset: register offset to be read 409 * @data: pointer to the read data 410 * 411 * Acquires semaphore then reads the PHY register at offset and stores the 412 * retrieved information in data. 413 * Release the acquired semaphore before exiting. 414 **/ 415 s32 e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data) 416 { 417 return __e1000e_read_phy_reg_igp(hw, offset, data, false); 418 } 419 420 /** 421 * e1000e_read_phy_reg_igp_locked - Read igp PHY register 422 * @hw: pointer to the HW structure 423 * @offset: register offset to be read 424 * @data: pointer to the read data 425 * 426 * Reads the PHY register at offset and stores the retrieved information 427 * in data. Assumes semaphore already acquired. 428 **/ 429 s32 e1000e_read_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 *data) 430 { 431 return __e1000e_read_phy_reg_igp(hw, offset, data, true); 432 } 433 434 /** 435 * e1000e_write_phy_reg_igp - Write igp PHY register 436 * @hw: pointer to the HW structure 437 * @offset: register offset to write to 438 * @data: data to write at register offset 439 * @locked: semaphore has already been acquired or not 440 * 441 * Acquires semaphore, if necessary, then writes the data to PHY register 442 * at the offset. Release any acquired semaphores before exiting. 443 **/ 444 static s32 __e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data, 445 bool locked) 446 { 447 s32 ret_val = 0; 448 449 if (!locked) { 450 if (!hw->phy.ops.acquire) 451 return 0; 452 453 ret_val = hw->phy.ops.acquire(hw); 454 if (ret_val) 455 return ret_val; 456 } 457 458 if (offset > MAX_PHY_MULTI_PAGE_REG) 459 ret_val = e1000e_write_phy_reg_mdic(hw, 460 IGP01E1000_PHY_PAGE_SELECT, 461 (u16)offset); 462 if (!ret_val) 463 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & 464 offset, 465 data); 466 if (!locked) 467 hw->phy.ops.release(hw); 468 469 return ret_val; 470 } 471 472 /** 473 * e1000e_write_phy_reg_igp - Write igp PHY register 474 * @hw: pointer to the HW structure 475 * @offset: register offset to write to 476 * @data: data to write at register offset 477 * 478 * Acquires semaphore then writes the data to PHY register 479 * at the offset. Release any acquired semaphores before exiting. 480 **/ 481 s32 e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data) 482 { 483 return __e1000e_write_phy_reg_igp(hw, offset, data, false); 484 } 485 486 /** 487 * e1000e_write_phy_reg_igp_locked - Write igp PHY register 488 * @hw: pointer to the HW structure 489 * @offset: register offset to write to 490 * @data: data to write at register offset 491 * 492 * Writes the data to PHY register at the offset. 493 * Assumes semaphore already acquired. 494 **/ 495 s32 e1000e_write_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 data) 496 { 497 return __e1000e_write_phy_reg_igp(hw, offset, data, true); 498 } 499 500 /** 501 * __e1000_read_kmrn_reg - Read kumeran register 502 * @hw: pointer to the HW structure 503 * @offset: register offset to be read 504 * @data: pointer to the read data 505 * @locked: semaphore has already been acquired or not 506 * 507 * Acquires semaphore, if necessary. Then reads the PHY register at offset 508 * using the kumeran interface. The information retrieved is stored in data. 509 * Release any acquired semaphores before exiting. 510 **/ 511 static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data, 512 bool locked) 513 { 514 u32 kmrnctrlsta; 515 516 if (!locked) { 517 s32 ret_val = 0; 518 519 if (!hw->phy.ops.acquire) 520 return 0; 521 522 ret_val = hw->phy.ops.acquire(hw); 523 if (ret_val) 524 return ret_val; 525 } 526 527 kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) & 528 E1000_KMRNCTRLSTA_OFFSET) | E1000_KMRNCTRLSTA_REN; 529 ew32(KMRNCTRLSTA, kmrnctrlsta); 530 e1e_flush(); 531 532 udelay(2); 533 534 kmrnctrlsta = er32(KMRNCTRLSTA); 535 *data = (u16)kmrnctrlsta; 536 537 if (!locked) 538 hw->phy.ops.release(hw); 539 540 return 0; 541 } 542 543 /** 544 * e1000e_read_kmrn_reg - Read kumeran register 545 * @hw: pointer to the HW structure 546 * @offset: register offset to be read 547 * @data: pointer to the read data 548 * 549 * Acquires semaphore then reads the PHY register at offset using the 550 * kumeran interface. The information retrieved is stored in data. 551 * Release the acquired semaphore before exiting. 552 **/ 553 s32 e1000e_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data) 554 { 555 return __e1000_read_kmrn_reg(hw, offset, data, false); 556 } 557 558 /** 559 * e1000e_read_kmrn_reg_locked - Read kumeran register 560 * @hw: pointer to the HW structure 561 * @offset: register offset to be read 562 * @data: pointer to the read data 563 * 564 * Reads the PHY register at offset using the kumeran interface. The 565 * information retrieved is stored in data. 566 * Assumes semaphore already acquired. 567 **/ 568 s32 e1000e_read_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 *data) 569 { 570 return __e1000_read_kmrn_reg(hw, offset, data, true); 571 } 572 573 /** 574 * __e1000_write_kmrn_reg - Write kumeran register 575 * @hw: pointer to the HW structure 576 * @offset: register offset to write to 577 * @data: data to write at register offset 578 * @locked: semaphore has already been acquired or not 579 * 580 * Acquires semaphore, if necessary. Then write the data to PHY register 581 * at the offset using the kumeran interface. Release any acquired semaphores 582 * before exiting. 583 **/ 584 static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data, 585 bool locked) 586 { 587 u32 kmrnctrlsta; 588 589 if (!locked) { 590 s32 ret_val = 0; 591 592 if (!hw->phy.ops.acquire) 593 return 0; 594 595 ret_val = hw->phy.ops.acquire(hw); 596 if (ret_val) 597 return ret_val; 598 } 599 600 kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) & 601 E1000_KMRNCTRLSTA_OFFSET) | data; 602 ew32(KMRNCTRLSTA, kmrnctrlsta); 603 e1e_flush(); 604 605 udelay(2); 606 607 if (!locked) 608 hw->phy.ops.release(hw); 609 610 return 0; 611 } 612 613 /** 614 * e1000e_write_kmrn_reg - Write kumeran register 615 * @hw: pointer to the HW structure 616 * @offset: register offset to write to 617 * @data: data to write at register offset 618 * 619 * Acquires semaphore then writes the data to the PHY register at the offset 620 * using the kumeran interface. Release the acquired semaphore before exiting. 621 **/ 622 s32 e1000e_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data) 623 { 624 return __e1000_write_kmrn_reg(hw, offset, data, false); 625 } 626 627 /** 628 * e1000e_write_kmrn_reg_locked - Write kumeran register 629 * @hw: pointer to the HW structure 630 * @offset: register offset to write to 631 * @data: data to write at register offset 632 * 633 * Write the data to PHY register at the offset using the kumeran interface. 634 * Assumes semaphore already acquired. 635 **/ 636 s32 e1000e_write_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 data) 637 { 638 return __e1000_write_kmrn_reg(hw, offset, data, true); 639 } 640 641 /** 642 * e1000_copper_link_setup_82577 - Setup 82577 PHY for copper link 643 * @hw: pointer to the HW structure 644 * 645 * Sets up Carrier-sense on Transmit and downshift values. 646 **/ 647 s32 e1000_copper_link_setup_82577(struct e1000_hw *hw) 648 { 649 s32 ret_val; 650 u16 phy_data; 651 652 /* Enable CRS on Tx. This must be set for half-duplex operation. */ 653 ret_val = e1e_rphy(hw, I82577_CFG_REG, &phy_data); 654 if (ret_val) 655 return ret_val; 656 657 phy_data |= I82577_CFG_ASSERT_CRS_ON_TX; 658 659 /* Enable downshift */ 660 phy_data |= I82577_CFG_ENABLE_DOWNSHIFT; 661 662 return e1e_wphy(hw, I82577_CFG_REG, phy_data); 663 } 664 665 /** 666 * e1000e_copper_link_setup_m88 - Setup m88 PHY's for copper link 667 * @hw: pointer to the HW structure 668 * 669 * Sets up MDI/MDI-X and polarity for m88 PHY's. If necessary, transmit clock 670 * and downshift values are set also. 671 **/ 672 s32 e1000e_copper_link_setup_m88(struct e1000_hw *hw) 673 { 674 struct e1000_phy_info *phy = &hw->phy; 675 s32 ret_val; 676 u16 phy_data; 677 678 /* Enable CRS on Tx. This must be set for half-duplex operation. */ 679 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 680 if (ret_val) 681 return ret_val; 682 683 /* For BM PHY this bit is downshift enable */ 684 if (phy->type != e1000_phy_bm) 685 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX; 686 687 /* 688 * Options: 689 * MDI/MDI-X = 0 (default) 690 * 0 - Auto for all speeds 691 * 1 - MDI mode 692 * 2 - MDI-X mode 693 * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes) 694 */ 695 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE; 696 697 switch (phy->mdix) { 698 case 1: 699 phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE; 700 break; 701 case 2: 702 phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE; 703 break; 704 case 3: 705 phy_data |= M88E1000_PSCR_AUTO_X_1000T; 706 break; 707 case 0: 708 default: 709 phy_data |= M88E1000_PSCR_AUTO_X_MODE; 710 break; 711 } 712 713 /* 714 * Options: 715 * disable_polarity_correction = 0 (default) 716 * Automatic Correction for Reversed Cable Polarity 717 * 0 - Disabled 718 * 1 - Enabled 719 */ 720 phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL; 721 if (phy->disable_polarity_correction == 1) 722 phy_data |= M88E1000_PSCR_POLARITY_REVERSAL; 723 724 /* Enable downshift on BM (disabled by default) */ 725 if (phy->type == e1000_phy_bm) 726 phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT; 727 728 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 729 if (ret_val) 730 return ret_val; 731 732 if ((phy->type == e1000_phy_m88) && 733 (phy->revision < E1000_REVISION_4) && 734 (phy->id != BME1000_E_PHY_ID_R2)) { 735 /* 736 * Force TX_CLK in the Extended PHY Specific Control Register 737 * to 25MHz clock. 738 */ 739 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data); 740 if (ret_val) 741 return ret_val; 742 743 phy_data |= M88E1000_EPSCR_TX_CLK_25; 744 745 if ((phy->revision == 2) && 746 (phy->id == M88E1111_I_PHY_ID)) { 747 /* 82573L PHY - set the downshift counter to 5x. */ 748 phy_data &= ~M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK; 749 phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X; 750 } else { 751 /* Configure Master and Slave downshift values */ 752 phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK | 753 M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK); 754 phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X | 755 M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X); 756 } 757 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data); 758 if (ret_val) 759 return ret_val; 760 } 761 762 if ((phy->type == e1000_phy_bm) && (phy->id == BME1000_E_PHY_ID_R2)) { 763 /* Set PHY page 0, register 29 to 0x0003 */ 764 ret_val = e1e_wphy(hw, 29, 0x0003); 765 if (ret_val) 766 return ret_val; 767 768 /* Set PHY page 0, register 30 to 0x0000 */ 769 ret_val = e1e_wphy(hw, 30, 0x0000); 770 if (ret_val) 771 return ret_val; 772 } 773 774 /* Commit the changes. */ 775 ret_val = e1000e_commit_phy(hw); 776 if (ret_val) { 777 e_dbg("Error committing the PHY changes\n"); 778 return ret_val; 779 } 780 781 if (phy->type == e1000_phy_82578) { 782 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data); 783 if (ret_val) 784 return ret_val; 785 786 /* 82578 PHY - set the downshift count to 1x. */ 787 phy_data |= I82578_EPSCR_DOWNSHIFT_ENABLE; 788 phy_data &= ~I82578_EPSCR_DOWNSHIFT_COUNTER_MASK; 789 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data); 790 if (ret_val) 791 return ret_val; 792 } 793 794 return 0; 795 } 796 797 /** 798 * e1000e_copper_link_setup_igp - Setup igp PHY's for copper link 799 * @hw: pointer to the HW structure 800 * 801 * Sets up LPLU, MDI/MDI-X, polarity, Smartspeed and Master/Slave config for 802 * igp PHY's. 803 **/ 804 s32 e1000e_copper_link_setup_igp(struct e1000_hw *hw) 805 { 806 struct e1000_phy_info *phy = &hw->phy; 807 s32 ret_val; 808 u16 data; 809 810 ret_val = e1000_phy_hw_reset(hw); 811 if (ret_val) { 812 e_dbg("Error resetting the PHY.\n"); 813 return ret_val; 814 } 815 816 /* 817 * Wait 100ms for MAC to configure PHY from NVM settings, to avoid 818 * timeout issues when LFS is enabled. 819 */ 820 msleep(100); 821 822 /* disable lplu d0 during driver init */ 823 ret_val = e1000_set_d0_lplu_state(hw, false); 824 if (ret_val) { 825 e_dbg("Error Disabling LPLU D0\n"); 826 return ret_val; 827 } 828 /* Configure mdi-mdix settings */ 829 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &data); 830 if (ret_val) 831 return ret_val; 832 833 data &= ~IGP01E1000_PSCR_AUTO_MDIX; 834 835 switch (phy->mdix) { 836 case 1: 837 data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX; 838 break; 839 case 2: 840 data |= IGP01E1000_PSCR_FORCE_MDI_MDIX; 841 break; 842 case 0: 843 default: 844 data |= IGP01E1000_PSCR_AUTO_MDIX; 845 break; 846 } 847 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, data); 848 if (ret_val) 849 return ret_val; 850 851 /* set auto-master slave resolution settings */ 852 if (hw->mac.autoneg) { 853 /* 854 * when autonegotiation advertisement is only 1000Mbps then we 855 * should disable SmartSpeed and enable Auto MasterSlave 856 * resolution as hardware default. 857 */ 858 if (phy->autoneg_advertised == ADVERTISE_1000_FULL) { 859 /* Disable SmartSpeed */ 860 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, 861 &data); 862 if (ret_val) 863 return ret_val; 864 865 data &= ~IGP01E1000_PSCFR_SMART_SPEED; 866 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, 867 data); 868 if (ret_val) 869 return ret_val; 870 871 /* Set auto Master/Slave resolution process */ 872 ret_val = e1e_rphy(hw, PHY_1000T_CTRL, &data); 873 if (ret_val) 874 return ret_val; 875 876 data &= ~CR_1000T_MS_ENABLE; 877 ret_val = e1e_wphy(hw, PHY_1000T_CTRL, data); 878 if (ret_val) 879 return ret_val; 880 } 881 882 ret_val = e1e_rphy(hw, PHY_1000T_CTRL, &data); 883 if (ret_val) 884 return ret_val; 885 886 /* load defaults for future use */ 887 phy->original_ms_type = (data & CR_1000T_MS_ENABLE) ? 888 ((data & CR_1000T_MS_VALUE) ? 889 e1000_ms_force_master : 890 e1000_ms_force_slave) : 891 e1000_ms_auto; 892 893 switch (phy->ms_type) { 894 case e1000_ms_force_master: 895 data |= (CR_1000T_MS_ENABLE | CR_1000T_MS_VALUE); 896 break; 897 case e1000_ms_force_slave: 898 data |= CR_1000T_MS_ENABLE; 899 data &= ~(CR_1000T_MS_VALUE); 900 break; 901 case e1000_ms_auto: 902 data &= ~CR_1000T_MS_ENABLE; 903 default: 904 break; 905 } 906 ret_val = e1e_wphy(hw, PHY_1000T_CTRL, data); 907 } 908 909 return ret_val; 910 } 911 912 /** 913 * e1000_phy_setup_autoneg - Configure PHY for auto-negotiation 914 * @hw: pointer to the HW structure 915 * 916 * Reads the MII auto-neg advertisement register and/or the 1000T control 917 * register and if the PHY is already setup for auto-negotiation, then 918 * return successful. Otherwise, setup advertisement and flow control to 919 * the appropriate values for the wanted auto-negotiation. 920 **/ 921 static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw) 922 { 923 struct e1000_phy_info *phy = &hw->phy; 924 s32 ret_val; 925 u16 mii_autoneg_adv_reg; 926 u16 mii_1000t_ctrl_reg = 0; 927 928 phy->autoneg_advertised &= phy->autoneg_mask; 929 930 /* Read the MII Auto-Neg Advertisement Register (Address 4). */ 931 ret_val = e1e_rphy(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg); 932 if (ret_val) 933 return ret_val; 934 935 if (phy->autoneg_mask & ADVERTISE_1000_FULL) { 936 /* Read the MII 1000Base-T Control Register (Address 9). */ 937 ret_val = e1e_rphy(hw, PHY_1000T_CTRL, &mii_1000t_ctrl_reg); 938 if (ret_val) 939 return ret_val; 940 } 941 942 /* 943 * Need to parse both autoneg_advertised and fc and set up 944 * the appropriate PHY registers. First we will parse for 945 * autoneg_advertised software override. Since we can advertise 946 * a plethora of combinations, we need to check each bit 947 * individually. 948 */ 949 950 /* 951 * First we clear all the 10/100 mb speed bits in the Auto-Neg 952 * Advertisement Register (Address 4) and the 1000 mb speed bits in 953 * the 1000Base-T Control Register (Address 9). 954 */ 955 mii_autoneg_adv_reg &= ~(NWAY_AR_100TX_FD_CAPS | 956 NWAY_AR_100TX_HD_CAPS | 957 NWAY_AR_10T_FD_CAPS | 958 NWAY_AR_10T_HD_CAPS); 959 mii_1000t_ctrl_reg &= ~(CR_1000T_HD_CAPS | CR_1000T_FD_CAPS); 960 961 e_dbg("autoneg_advertised %x\n", phy->autoneg_advertised); 962 963 /* Do we want to advertise 10 Mb Half Duplex? */ 964 if (phy->autoneg_advertised & ADVERTISE_10_HALF) { 965 e_dbg("Advertise 10mb Half duplex\n"); 966 mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS; 967 } 968 969 /* Do we want to advertise 10 Mb Full Duplex? */ 970 if (phy->autoneg_advertised & ADVERTISE_10_FULL) { 971 e_dbg("Advertise 10mb Full duplex\n"); 972 mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS; 973 } 974 975 /* Do we want to advertise 100 Mb Half Duplex? */ 976 if (phy->autoneg_advertised & ADVERTISE_100_HALF) { 977 e_dbg("Advertise 100mb Half duplex\n"); 978 mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS; 979 } 980 981 /* Do we want to advertise 100 Mb Full Duplex? */ 982 if (phy->autoneg_advertised & ADVERTISE_100_FULL) { 983 e_dbg("Advertise 100mb Full duplex\n"); 984 mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS; 985 } 986 987 /* We do not allow the Phy to advertise 1000 Mb Half Duplex */ 988 if (phy->autoneg_advertised & ADVERTISE_1000_HALF) 989 e_dbg("Advertise 1000mb Half duplex request denied!\n"); 990 991 /* Do we want to advertise 1000 Mb Full Duplex? */ 992 if (phy->autoneg_advertised & ADVERTISE_1000_FULL) { 993 e_dbg("Advertise 1000mb Full duplex\n"); 994 mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS; 995 } 996 997 /* 998 * Check for a software override of the flow control settings, and 999 * setup the PHY advertisement registers accordingly. If 1000 * auto-negotiation is enabled, then software will have to set the 1001 * "PAUSE" bits to the correct value in the Auto-Negotiation 1002 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto- 1003 * negotiation. 1004 * 1005 * The possible values of the "fc" parameter are: 1006 * 0: Flow control is completely disabled 1007 * 1: Rx flow control is enabled (we can receive pause frames 1008 * but not send pause frames). 1009 * 2: Tx flow control is enabled (we can send pause frames 1010 * but we do not support receiving pause frames). 1011 * 3: Both Rx and Tx flow control (symmetric) are enabled. 1012 * other: No software override. The flow control configuration 1013 * in the EEPROM is used. 1014 */ 1015 switch (hw->fc.current_mode) { 1016 case e1000_fc_none: 1017 /* 1018 * Flow control (Rx & Tx) is completely disabled by a 1019 * software over-ride. 1020 */ 1021 mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1022 break; 1023 case e1000_fc_rx_pause: 1024 /* 1025 * Rx Flow control is enabled, and Tx Flow control is 1026 * disabled, by a software over-ride. 1027 * 1028 * Since there really isn't a way to advertise that we are 1029 * capable of Rx Pause ONLY, we will advertise that we 1030 * support both symmetric and asymmetric Rx PAUSE. Later 1031 * (in e1000e_config_fc_after_link_up) we will disable the 1032 * hw's ability to send PAUSE frames. 1033 */ 1034 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1035 break; 1036 case e1000_fc_tx_pause: 1037 /* 1038 * Tx Flow control is enabled, and Rx Flow control is 1039 * disabled, by a software over-ride. 1040 */ 1041 mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR; 1042 mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE; 1043 break; 1044 case e1000_fc_full: 1045 /* 1046 * Flow control (both Rx and Tx) is enabled by a software 1047 * over-ride. 1048 */ 1049 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1050 break; 1051 default: 1052 e_dbg("Flow control param set incorrectly\n"); 1053 return -E1000_ERR_CONFIG; 1054 } 1055 1056 ret_val = e1e_wphy(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg); 1057 if (ret_val) 1058 return ret_val; 1059 1060 e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg); 1061 1062 if (phy->autoneg_mask & ADVERTISE_1000_FULL) 1063 ret_val = e1e_wphy(hw, PHY_1000T_CTRL, mii_1000t_ctrl_reg); 1064 1065 return ret_val; 1066 } 1067 1068 /** 1069 * e1000_copper_link_autoneg - Setup/Enable autoneg for copper link 1070 * @hw: pointer to the HW structure 1071 * 1072 * Performs initial bounds checking on autoneg advertisement parameter, then 1073 * configure to advertise the full capability. Setup the PHY to autoneg 1074 * and restart the negotiation process between the link partner. If 1075 * autoneg_wait_to_complete, then wait for autoneg to complete before exiting. 1076 **/ 1077 static s32 e1000_copper_link_autoneg(struct e1000_hw *hw) 1078 { 1079 struct e1000_phy_info *phy = &hw->phy; 1080 s32 ret_val; 1081 u16 phy_ctrl; 1082 1083 /* 1084 * Perform some bounds checking on the autoneg advertisement 1085 * parameter. 1086 */ 1087 phy->autoneg_advertised &= phy->autoneg_mask; 1088 1089 /* 1090 * If autoneg_advertised is zero, we assume it was not defaulted 1091 * by the calling code so we set to advertise full capability. 1092 */ 1093 if (phy->autoneg_advertised == 0) 1094 phy->autoneg_advertised = phy->autoneg_mask; 1095 1096 e_dbg("Reconfiguring auto-neg advertisement params\n"); 1097 ret_val = e1000_phy_setup_autoneg(hw); 1098 if (ret_val) { 1099 e_dbg("Error Setting up Auto-Negotiation\n"); 1100 return ret_val; 1101 } 1102 e_dbg("Restarting Auto-Neg\n"); 1103 1104 /* 1105 * Restart auto-negotiation by setting the Auto Neg Enable bit and 1106 * the Auto Neg Restart bit in the PHY control register. 1107 */ 1108 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_ctrl); 1109 if (ret_val) 1110 return ret_val; 1111 1112 phy_ctrl |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG); 1113 ret_val = e1e_wphy(hw, PHY_CONTROL, phy_ctrl); 1114 if (ret_val) 1115 return ret_val; 1116 1117 /* 1118 * Does the user want to wait for Auto-Neg to complete here, or 1119 * check at a later time (for example, callback routine). 1120 */ 1121 if (phy->autoneg_wait_to_complete) { 1122 ret_val = e1000_wait_autoneg(hw); 1123 if (ret_val) { 1124 e_dbg("Error while waiting for autoneg to complete\n"); 1125 return ret_val; 1126 } 1127 } 1128 1129 hw->mac.get_link_status = true; 1130 1131 return ret_val; 1132 } 1133 1134 /** 1135 * e1000e_setup_copper_link - Configure copper link settings 1136 * @hw: pointer to the HW structure 1137 * 1138 * Calls the appropriate function to configure the link for auto-neg or forced 1139 * speed and duplex. Then we check for link, once link is established calls 1140 * to configure collision distance and flow control are called. If link is 1141 * not established, we return -E1000_ERR_PHY (-2). 1142 **/ 1143 s32 e1000e_setup_copper_link(struct e1000_hw *hw) 1144 { 1145 s32 ret_val; 1146 bool link; 1147 1148 if (hw->mac.autoneg) { 1149 /* 1150 * Setup autoneg and flow control advertisement and perform 1151 * autonegotiation. 1152 */ 1153 ret_val = e1000_copper_link_autoneg(hw); 1154 if (ret_val) 1155 return ret_val; 1156 } else { 1157 /* 1158 * PHY will be set to 10H, 10F, 100H or 100F 1159 * depending on user settings. 1160 */ 1161 e_dbg("Forcing Speed and Duplex\n"); 1162 ret_val = e1000_phy_force_speed_duplex(hw); 1163 if (ret_val) { 1164 e_dbg("Error Forcing Speed and Duplex\n"); 1165 return ret_val; 1166 } 1167 } 1168 1169 /* 1170 * Check link status. Wait up to 100 microseconds for link to become 1171 * valid. 1172 */ 1173 ret_val = e1000e_phy_has_link_generic(hw, COPPER_LINK_UP_LIMIT, 10, 1174 &link); 1175 if (ret_val) 1176 return ret_val; 1177 1178 if (link) { 1179 e_dbg("Valid link established!!!\n"); 1180 hw->mac.ops.config_collision_dist(hw); 1181 ret_val = e1000e_config_fc_after_link_up(hw); 1182 } else { 1183 e_dbg("Unable to establish link!!!\n"); 1184 } 1185 1186 return ret_val; 1187 } 1188 1189 /** 1190 * e1000e_phy_force_speed_duplex_igp - Force speed/duplex for igp PHY 1191 * @hw: pointer to the HW structure 1192 * 1193 * Calls the PHY setup function to force speed and duplex. Clears the 1194 * auto-crossover to force MDI manually. Waits for link and returns 1195 * successful if link up is successful, else -E1000_ERR_PHY (-2). 1196 **/ 1197 s32 e1000e_phy_force_speed_duplex_igp(struct e1000_hw *hw) 1198 { 1199 struct e1000_phy_info *phy = &hw->phy; 1200 s32 ret_val; 1201 u16 phy_data; 1202 bool link; 1203 1204 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_data); 1205 if (ret_val) 1206 return ret_val; 1207 1208 e1000e_phy_force_speed_duplex_setup(hw, &phy_data); 1209 1210 ret_val = e1e_wphy(hw, PHY_CONTROL, phy_data); 1211 if (ret_val) 1212 return ret_val; 1213 1214 /* 1215 * Clear Auto-Crossover to force MDI manually. IGP requires MDI 1216 * forced whenever speed and duplex are forced. 1217 */ 1218 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data); 1219 if (ret_val) 1220 return ret_val; 1221 1222 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX; 1223 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX; 1224 1225 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, phy_data); 1226 if (ret_val) 1227 return ret_val; 1228 1229 e_dbg("IGP PSCR: %X\n", phy_data); 1230 1231 udelay(1); 1232 1233 if (phy->autoneg_wait_to_complete) { 1234 e_dbg("Waiting for forced speed/duplex link on IGP phy.\n"); 1235 1236 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1237 100000, &link); 1238 if (ret_val) 1239 return ret_val; 1240 1241 if (!link) 1242 e_dbg("Link taking longer than expected.\n"); 1243 1244 /* Try once more */ 1245 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1246 100000, &link); 1247 } 1248 1249 return ret_val; 1250 } 1251 1252 /** 1253 * e1000e_phy_force_speed_duplex_m88 - Force speed/duplex for m88 PHY 1254 * @hw: pointer to the HW structure 1255 * 1256 * Calls the PHY setup function to force speed and duplex. Clears the 1257 * auto-crossover to force MDI manually. Resets the PHY to commit the 1258 * changes. If time expires while waiting for link up, we reset the DSP. 1259 * After reset, TX_CLK and CRS on Tx must be set. Return successful upon 1260 * successful completion, else return corresponding error code. 1261 **/ 1262 s32 e1000e_phy_force_speed_duplex_m88(struct e1000_hw *hw) 1263 { 1264 struct e1000_phy_info *phy = &hw->phy; 1265 s32 ret_val; 1266 u16 phy_data; 1267 bool link; 1268 1269 /* 1270 * Clear Auto-Crossover to force MDI manually. M88E1000 requires MDI 1271 * forced whenever speed and duplex are forced. 1272 */ 1273 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1274 if (ret_val) 1275 return ret_val; 1276 1277 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE; 1278 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1279 if (ret_val) 1280 return ret_val; 1281 1282 e_dbg("M88E1000 PSCR: %X\n", phy_data); 1283 1284 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_data); 1285 if (ret_val) 1286 return ret_val; 1287 1288 e1000e_phy_force_speed_duplex_setup(hw, &phy_data); 1289 1290 ret_val = e1e_wphy(hw, PHY_CONTROL, phy_data); 1291 if (ret_val) 1292 return ret_val; 1293 1294 /* Reset the phy to commit changes. */ 1295 ret_val = e1000e_commit_phy(hw); 1296 if (ret_val) 1297 return ret_val; 1298 1299 if (phy->autoneg_wait_to_complete) { 1300 e_dbg("Waiting for forced speed/duplex link on M88 phy.\n"); 1301 1302 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1303 100000, &link); 1304 if (ret_val) 1305 return ret_val; 1306 1307 if (!link) { 1308 if (hw->phy.type != e1000_phy_m88) { 1309 e_dbg("Link taking longer than expected.\n"); 1310 } else { 1311 /* 1312 * We didn't get link. 1313 * Reset the DSP and cross our fingers. 1314 */ 1315 ret_val = e1e_wphy(hw, M88E1000_PHY_PAGE_SELECT, 1316 0x001d); 1317 if (ret_val) 1318 return ret_val; 1319 ret_val = e1000e_phy_reset_dsp(hw); 1320 if (ret_val) 1321 return ret_val; 1322 } 1323 } 1324 1325 /* Try once more */ 1326 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1327 100000, &link); 1328 if (ret_val) 1329 return ret_val; 1330 } 1331 1332 if (hw->phy.type != e1000_phy_m88) 1333 return 0; 1334 1335 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data); 1336 if (ret_val) 1337 return ret_val; 1338 1339 /* 1340 * Resetting the phy means we need to re-force TX_CLK in the 1341 * Extended PHY Specific Control Register to 25MHz clock from 1342 * the reset value of 2.5MHz. 1343 */ 1344 phy_data |= M88E1000_EPSCR_TX_CLK_25; 1345 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data); 1346 if (ret_val) 1347 return ret_val; 1348 1349 /* 1350 * In addition, we must re-enable CRS on Tx for both half and full 1351 * duplex. 1352 */ 1353 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1354 if (ret_val) 1355 return ret_val; 1356 1357 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX; 1358 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1359 1360 return ret_val; 1361 } 1362 1363 /** 1364 * e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex 1365 * @hw: pointer to the HW structure 1366 * 1367 * Forces the speed and duplex settings of the PHY. 1368 * This is a function pointer entry point only called by 1369 * PHY setup routines. 1370 **/ 1371 s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw) 1372 { 1373 struct e1000_phy_info *phy = &hw->phy; 1374 s32 ret_val; 1375 u16 data; 1376 bool link; 1377 1378 ret_val = e1e_rphy(hw, PHY_CONTROL, &data); 1379 if (ret_val) 1380 return ret_val; 1381 1382 e1000e_phy_force_speed_duplex_setup(hw, &data); 1383 1384 ret_val = e1e_wphy(hw, PHY_CONTROL, data); 1385 if (ret_val) 1386 return ret_val; 1387 1388 /* Disable MDI-X support for 10/100 */ 1389 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data); 1390 if (ret_val) 1391 return ret_val; 1392 1393 data &= ~IFE_PMC_AUTO_MDIX; 1394 data &= ~IFE_PMC_FORCE_MDIX; 1395 1396 ret_val = e1e_wphy(hw, IFE_PHY_MDIX_CONTROL, data); 1397 if (ret_val) 1398 return ret_val; 1399 1400 e_dbg("IFE PMC: %X\n", data); 1401 1402 udelay(1); 1403 1404 if (phy->autoneg_wait_to_complete) { 1405 e_dbg("Waiting for forced speed/duplex link on IFE phy.\n"); 1406 1407 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1408 100000, &link); 1409 if (ret_val) 1410 return ret_val; 1411 1412 if (!link) 1413 e_dbg("Link taking longer than expected.\n"); 1414 1415 /* Try once more */ 1416 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 1417 100000, &link); 1418 if (ret_val) 1419 return ret_val; 1420 } 1421 1422 return 0; 1423 } 1424 1425 /** 1426 * e1000e_phy_force_speed_duplex_setup - Configure forced PHY speed/duplex 1427 * @hw: pointer to the HW structure 1428 * @phy_ctrl: pointer to current value of PHY_CONTROL 1429 * 1430 * Forces speed and duplex on the PHY by doing the following: disable flow 1431 * control, force speed/duplex on the MAC, disable auto speed detection, 1432 * disable auto-negotiation, configure duplex, configure speed, configure 1433 * the collision distance, write configuration to CTRL register. The 1434 * caller must write to the PHY_CONTROL register for these settings to 1435 * take affect. 1436 **/ 1437 void e1000e_phy_force_speed_duplex_setup(struct e1000_hw *hw, u16 *phy_ctrl) 1438 { 1439 struct e1000_mac_info *mac = &hw->mac; 1440 u32 ctrl; 1441 1442 /* Turn off flow control when forcing speed/duplex */ 1443 hw->fc.current_mode = e1000_fc_none; 1444 1445 /* Force speed/duplex on the mac */ 1446 ctrl = er32(CTRL); 1447 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX); 1448 ctrl &= ~E1000_CTRL_SPD_SEL; 1449 1450 /* Disable Auto Speed Detection */ 1451 ctrl &= ~E1000_CTRL_ASDE; 1452 1453 /* Disable autoneg on the phy */ 1454 *phy_ctrl &= ~MII_CR_AUTO_NEG_EN; 1455 1456 /* Forcing Full or Half Duplex? */ 1457 if (mac->forced_speed_duplex & E1000_ALL_HALF_DUPLEX) { 1458 ctrl &= ~E1000_CTRL_FD; 1459 *phy_ctrl &= ~MII_CR_FULL_DUPLEX; 1460 e_dbg("Half Duplex\n"); 1461 } else { 1462 ctrl |= E1000_CTRL_FD; 1463 *phy_ctrl |= MII_CR_FULL_DUPLEX; 1464 e_dbg("Full Duplex\n"); 1465 } 1466 1467 /* Forcing 10mb or 100mb? */ 1468 if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) { 1469 ctrl |= E1000_CTRL_SPD_100; 1470 *phy_ctrl |= MII_CR_SPEED_100; 1471 *phy_ctrl &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_10); 1472 e_dbg("Forcing 100mb\n"); 1473 } else { 1474 ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100); 1475 *phy_ctrl |= MII_CR_SPEED_10; 1476 *phy_ctrl &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_100); 1477 e_dbg("Forcing 10mb\n"); 1478 } 1479 1480 hw->mac.ops.config_collision_dist(hw); 1481 1482 ew32(CTRL, ctrl); 1483 } 1484 1485 /** 1486 * e1000e_set_d3_lplu_state - Sets low power link up state for D3 1487 * @hw: pointer to the HW structure 1488 * @active: boolean used to enable/disable lplu 1489 * 1490 * Success returns 0, Failure returns 1 1491 * 1492 * The low power link up (lplu) state is set to the power management level D3 1493 * and SmartSpeed is disabled when active is true, else clear lplu for D3 1494 * and enable Smartspeed. LPLU and Smartspeed are mutually exclusive. LPLU 1495 * is used during Dx states where the power conservation is most important. 1496 * During driver activity, SmartSpeed should be enabled so performance is 1497 * maintained. 1498 **/ 1499 s32 e1000e_set_d3_lplu_state(struct e1000_hw *hw, bool active) 1500 { 1501 struct e1000_phy_info *phy = &hw->phy; 1502 s32 ret_val; 1503 u16 data; 1504 1505 ret_val = e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &data); 1506 if (ret_val) 1507 return ret_val; 1508 1509 if (!active) { 1510 data &= ~IGP02E1000_PM_D3_LPLU; 1511 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data); 1512 if (ret_val) 1513 return ret_val; 1514 /* 1515 * LPLU and SmartSpeed are mutually exclusive. LPLU is used 1516 * during Dx states where the power conservation is most 1517 * important. During driver activity we should enable 1518 * SmartSpeed, so performance is maintained. 1519 */ 1520 if (phy->smart_speed == e1000_smart_speed_on) { 1521 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, 1522 &data); 1523 if (ret_val) 1524 return ret_val; 1525 1526 data |= IGP01E1000_PSCFR_SMART_SPEED; 1527 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, 1528 data); 1529 if (ret_val) 1530 return ret_val; 1531 } else if (phy->smart_speed == e1000_smart_speed_off) { 1532 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, 1533 &data); 1534 if (ret_val) 1535 return ret_val; 1536 1537 data &= ~IGP01E1000_PSCFR_SMART_SPEED; 1538 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, 1539 data); 1540 if (ret_val) 1541 return ret_val; 1542 } 1543 } else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) || 1544 (phy->autoneg_advertised == E1000_ALL_NOT_GIG) || 1545 (phy->autoneg_advertised == E1000_ALL_10_SPEED)) { 1546 data |= IGP02E1000_PM_D3_LPLU; 1547 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data); 1548 if (ret_val) 1549 return ret_val; 1550 1551 /* When LPLU is enabled, we should disable SmartSpeed */ 1552 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, &data); 1553 if (ret_val) 1554 return ret_val; 1555 1556 data &= ~IGP01E1000_PSCFR_SMART_SPEED; 1557 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, data); 1558 } 1559 1560 return ret_val; 1561 } 1562 1563 /** 1564 * e1000e_check_downshift - Checks whether a downshift in speed occurred 1565 * @hw: pointer to the HW structure 1566 * 1567 * Success returns 0, Failure returns 1 1568 * 1569 * A downshift is detected by querying the PHY link health. 1570 **/ 1571 s32 e1000e_check_downshift(struct e1000_hw *hw) 1572 { 1573 struct e1000_phy_info *phy = &hw->phy; 1574 s32 ret_val; 1575 u16 phy_data, offset, mask; 1576 1577 switch (phy->type) { 1578 case e1000_phy_m88: 1579 case e1000_phy_gg82563: 1580 case e1000_phy_bm: 1581 case e1000_phy_82578: 1582 offset = M88E1000_PHY_SPEC_STATUS; 1583 mask = M88E1000_PSSR_DOWNSHIFT; 1584 break; 1585 case e1000_phy_igp_2: 1586 case e1000_phy_igp_3: 1587 offset = IGP01E1000_PHY_LINK_HEALTH; 1588 mask = IGP01E1000_PLHR_SS_DOWNGRADE; 1589 break; 1590 default: 1591 /* speed downshift not supported */ 1592 phy->speed_downgraded = false; 1593 return 0; 1594 } 1595 1596 ret_val = e1e_rphy(hw, offset, &phy_data); 1597 1598 if (!ret_val) 1599 phy->speed_downgraded = (phy_data & mask); 1600 1601 return ret_val; 1602 } 1603 1604 /** 1605 * e1000_check_polarity_m88 - Checks the polarity. 1606 * @hw: pointer to the HW structure 1607 * 1608 * Success returns 0, Failure returns -E1000_ERR_PHY (-2) 1609 * 1610 * Polarity is determined based on the PHY specific status register. 1611 **/ 1612 s32 e1000_check_polarity_m88(struct e1000_hw *hw) 1613 { 1614 struct e1000_phy_info *phy = &hw->phy; 1615 s32 ret_val; 1616 u16 data; 1617 1618 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &data); 1619 1620 if (!ret_val) 1621 phy->cable_polarity = (data & M88E1000_PSSR_REV_POLARITY) 1622 ? e1000_rev_polarity_reversed 1623 : e1000_rev_polarity_normal; 1624 1625 return ret_val; 1626 } 1627 1628 /** 1629 * e1000_check_polarity_igp - Checks the polarity. 1630 * @hw: pointer to the HW structure 1631 * 1632 * Success returns 0, Failure returns -E1000_ERR_PHY (-2) 1633 * 1634 * Polarity is determined based on the PHY port status register, and the 1635 * current speed (since there is no polarity at 100Mbps). 1636 **/ 1637 s32 e1000_check_polarity_igp(struct e1000_hw *hw) 1638 { 1639 struct e1000_phy_info *phy = &hw->phy; 1640 s32 ret_val; 1641 u16 data, offset, mask; 1642 1643 /* 1644 * Polarity is determined based on the speed of 1645 * our connection. 1646 */ 1647 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data); 1648 if (ret_val) 1649 return ret_val; 1650 1651 if ((data & IGP01E1000_PSSR_SPEED_MASK) == 1652 IGP01E1000_PSSR_SPEED_1000MBPS) { 1653 offset = IGP01E1000_PHY_PCS_INIT_REG; 1654 mask = IGP01E1000_PHY_POLARITY_MASK; 1655 } else { 1656 /* 1657 * This really only applies to 10Mbps since 1658 * there is no polarity for 100Mbps (always 0). 1659 */ 1660 offset = IGP01E1000_PHY_PORT_STATUS; 1661 mask = IGP01E1000_PSSR_POLARITY_REVERSED; 1662 } 1663 1664 ret_val = e1e_rphy(hw, offset, &data); 1665 1666 if (!ret_val) 1667 phy->cable_polarity = (data & mask) 1668 ? e1000_rev_polarity_reversed 1669 : e1000_rev_polarity_normal; 1670 1671 return ret_val; 1672 } 1673 1674 /** 1675 * e1000_check_polarity_ife - Check cable polarity for IFE PHY 1676 * @hw: pointer to the HW structure 1677 * 1678 * Polarity is determined on the polarity reversal feature being enabled. 1679 **/ 1680 s32 e1000_check_polarity_ife(struct e1000_hw *hw) 1681 { 1682 struct e1000_phy_info *phy = &hw->phy; 1683 s32 ret_val; 1684 u16 phy_data, offset, mask; 1685 1686 /* 1687 * Polarity is determined based on the reversal feature being enabled. 1688 */ 1689 if (phy->polarity_correction) { 1690 offset = IFE_PHY_EXTENDED_STATUS_CONTROL; 1691 mask = IFE_PESC_POLARITY_REVERSED; 1692 } else { 1693 offset = IFE_PHY_SPECIAL_CONTROL; 1694 mask = IFE_PSC_FORCE_POLARITY; 1695 } 1696 1697 ret_val = e1e_rphy(hw, offset, &phy_data); 1698 1699 if (!ret_val) 1700 phy->cable_polarity = (phy_data & mask) 1701 ? e1000_rev_polarity_reversed 1702 : e1000_rev_polarity_normal; 1703 1704 return ret_val; 1705 } 1706 1707 /** 1708 * e1000_wait_autoneg - Wait for auto-neg completion 1709 * @hw: pointer to the HW structure 1710 * 1711 * Waits for auto-negotiation to complete or for the auto-negotiation time 1712 * limit to expire, which ever happens first. 1713 **/ 1714 static s32 e1000_wait_autoneg(struct e1000_hw *hw) 1715 { 1716 s32 ret_val = 0; 1717 u16 i, phy_status; 1718 1719 /* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */ 1720 for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) { 1721 ret_val = e1e_rphy(hw, PHY_STATUS, &phy_status); 1722 if (ret_val) 1723 break; 1724 ret_val = e1e_rphy(hw, PHY_STATUS, &phy_status); 1725 if (ret_val) 1726 break; 1727 if (phy_status & MII_SR_AUTONEG_COMPLETE) 1728 break; 1729 msleep(100); 1730 } 1731 1732 /* 1733 * PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation 1734 * has completed. 1735 */ 1736 return ret_val; 1737 } 1738 1739 /** 1740 * e1000e_phy_has_link_generic - Polls PHY for link 1741 * @hw: pointer to the HW structure 1742 * @iterations: number of times to poll for link 1743 * @usec_interval: delay between polling attempts 1744 * @success: pointer to whether polling was successful or not 1745 * 1746 * Polls the PHY status register for link, 'iterations' number of times. 1747 **/ 1748 s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations, 1749 u32 usec_interval, bool *success) 1750 { 1751 s32 ret_val = 0; 1752 u16 i, phy_status; 1753 1754 for (i = 0; i < iterations; i++) { 1755 /* 1756 * Some PHYs require the PHY_STATUS register to be read 1757 * twice due to the link bit being sticky. No harm doing 1758 * it across the board. 1759 */ 1760 ret_val = e1e_rphy(hw, PHY_STATUS, &phy_status); 1761 if (ret_val) 1762 /* 1763 * If the first read fails, another entity may have 1764 * ownership of the resources, wait and try again to 1765 * see if they have relinquished the resources yet. 1766 */ 1767 udelay(usec_interval); 1768 ret_val = e1e_rphy(hw, PHY_STATUS, &phy_status); 1769 if (ret_val) 1770 break; 1771 if (phy_status & MII_SR_LINK_STATUS) 1772 break; 1773 if (usec_interval >= 1000) 1774 mdelay(usec_interval/1000); 1775 else 1776 udelay(usec_interval); 1777 } 1778 1779 *success = (i < iterations); 1780 1781 return ret_val; 1782 } 1783 1784 /** 1785 * e1000e_get_cable_length_m88 - Determine cable length for m88 PHY 1786 * @hw: pointer to the HW structure 1787 * 1788 * Reads the PHY specific status register to retrieve the cable length 1789 * information. The cable length is determined by averaging the minimum and 1790 * maximum values to get the "average" cable length. The m88 PHY has four 1791 * possible cable length values, which are: 1792 * Register Value Cable Length 1793 * 0 < 50 meters 1794 * 1 50 - 80 meters 1795 * 2 80 - 110 meters 1796 * 3 110 - 140 meters 1797 * 4 > 140 meters 1798 **/ 1799 s32 e1000e_get_cable_length_m88(struct e1000_hw *hw) 1800 { 1801 struct e1000_phy_info *phy = &hw->phy; 1802 s32 ret_val; 1803 u16 phy_data, index; 1804 1805 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data); 1806 if (ret_val) 1807 return ret_val; 1808 1809 index = (phy_data & M88E1000_PSSR_CABLE_LENGTH) >> 1810 M88E1000_PSSR_CABLE_LENGTH_SHIFT; 1811 1812 if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1) 1813 return -E1000_ERR_PHY; 1814 1815 phy->min_cable_length = e1000_m88_cable_length_table[index]; 1816 phy->max_cable_length = e1000_m88_cable_length_table[index + 1]; 1817 1818 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2; 1819 1820 return 0; 1821 } 1822 1823 /** 1824 * e1000e_get_cable_length_igp_2 - Determine cable length for igp2 PHY 1825 * @hw: pointer to the HW structure 1826 * 1827 * The automatic gain control (agc) normalizes the amplitude of the 1828 * received signal, adjusting for the attenuation produced by the 1829 * cable. By reading the AGC registers, which represent the 1830 * combination of coarse and fine gain value, the value can be put 1831 * into a lookup table to obtain the approximate cable length 1832 * for each channel. 1833 **/ 1834 s32 e1000e_get_cable_length_igp_2(struct e1000_hw *hw) 1835 { 1836 struct e1000_phy_info *phy = &hw->phy; 1837 s32 ret_val; 1838 u16 phy_data, i, agc_value = 0; 1839 u16 cur_agc_index, max_agc_index = 0; 1840 u16 min_agc_index = IGP02E1000_CABLE_LENGTH_TABLE_SIZE - 1; 1841 static const u16 agc_reg_array[IGP02E1000_PHY_CHANNEL_NUM] = { 1842 IGP02E1000_PHY_AGC_A, 1843 IGP02E1000_PHY_AGC_B, 1844 IGP02E1000_PHY_AGC_C, 1845 IGP02E1000_PHY_AGC_D 1846 }; 1847 1848 /* Read the AGC registers for all channels */ 1849 for (i = 0; i < IGP02E1000_PHY_CHANNEL_NUM; i++) { 1850 ret_val = e1e_rphy(hw, agc_reg_array[i], &phy_data); 1851 if (ret_val) 1852 return ret_val; 1853 1854 /* 1855 * Getting bits 15:9, which represent the combination of 1856 * coarse and fine gain values. The result is a number 1857 * that can be put into the lookup table to obtain the 1858 * approximate cable length. 1859 */ 1860 cur_agc_index = (phy_data >> IGP02E1000_AGC_LENGTH_SHIFT) & 1861 IGP02E1000_AGC_LENGTH_MASK; 1862 1863 /* Array index bound check. */ 1864 if ((cur_agc_index >= IGP02E1000_CABLE_LENGTH_TABLE_SIZE) || 1865 (cur_agc_index == 0)) 1866 return -E1000_ERR_PHY; 1867 1868 /* Remove min & max AGC values from calculation. */ 1869 if (e1000_igp_2_cable_length_table[min_agc_index] > 1870 e1000_igp_2_cable_length_table[cur_agc_index]) 1871 min_agc_index = cur_agc_index; 1872 if (e1000_igp_2_cable_length_table[max_agc_index] < 1873 e1000_igp_2_cable_length_table[cur_agc_index]) 1874 max_agc_index = cur_agc_index; 1875 1876 agc_value += e1000_igp_2_cable_length_table[cur_agc_index]; 1877 } 1878 1879 agc_value -= (e1000_igp_2_cable_length_table[min_agc_index] + 1880 e1000_igp_2_cable_length_table[max_agc_index]); 1881 agc_value /= (IGP02E1000_PHY_CHANNEL_NUM - 2); 1882 1883 /* Calculate cable length with the error range of +/- 10 meters. */ 1884 phy->min_cable_length = ((agc_value - IGP02E1000_AGC_RANGE) > 0) ? 1885 (agc_value - IGP02E1000_AGC_RANGE) : 0; 1886 phy->max_cable_length = agc_value + IGP02E1000_AGC_RANGE; 1887 1888 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2; 1889 1890 return 0; 1891 } 1892 1893 /** 1894 * e1000e_get_phy_info_m88 - Retrieve PHY information 1895 * @hw: pointer to the HW structure 1896 * 1897 * Valid for only copper links. Read the PHY status register (sticky read) 1898 * to verify that link is up. Read the PHY special control register to 1899 * determine the polarity and 10base-T extended distance. Read the PHY 1900 * special status register to determine MDI/MDIx and current speed. If 1901 * speed is 1000, then determine cable length, local and remote receiver. 1902 **/ 1903 s32 e1000e_get_phy_info_m88(struct e1000_hw *hw) 1904 { 1905 struct e1000_phy_info *phy = &hw->phy; 1906 s32 ret_val; 1907 u16 phy_data; 1908 bool link; 1909 1910 if (phy->media_type != e1000_media_type_copper) { 1911 e_dbg("Phy info is only valid for copper media\n"); 1912 return -E1000_ERR_CONFIG; 1913 } 1914 1915 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link); 1916 if (ret_val) 1917 return ret_val; 1918 1919 if (!link) { 1920 e_dbg("Phy info is only valid if link is up\n"); 1921 return -E1000_ERR_CONFIG; 1922 } 1923 1924 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1925 if (ret_val) 1926 return ret_val; 1927 1928 phy->polarity_correction = (phy_data & 1929 M88E1000_PSCR_POLARITY_REVERSAL); 1930 1931 ret_val = e1000_check_polarity_m88(hw); 1932 if (ret_val) 1933 return ret_val; 1934 1935 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data); 1936 if (ret_val) 1937 return ret_val; 1938 1939 phy->is_mdix = (phy_data & M88E1000_PSSR_MDIX); 1940 1941 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) { 1942 ret_val = e1000_get_cable_length(hw); 1943 if (ret_val) 1944 return ret_val; 1945 1946 ret_val = e1e_rphy(hw, PHY_1000T_STATUS, &phy_data); 1947 if (ret_val) 1948 return ret_val; 1949 1950 phy->local_rx = (phy_data & SR_1000T_LOCAL_RX_STATUS) 1951 ? e1000_1000t_rx_status_ok 1952 : e1000_1000t_rx_status_not_ok; 1953 1954 phy->remote_rx = (phy_data & SR_1000T_REMOTE_RX_STATUS) 1955 ? e1000_1000t_rx_status_ok 1956 : e1000_1000t_rx_status_not_ok; 1957 } else { 1958 /* Set values to "undefined" */ 1959 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED; 1960 phy->local_rx = e1000_1000t_rx_status_undefined; 1961 phy->remote_rx = e1000_1000t_rx_status_undefined; 1962 } 1963 1964 return ret_val; 1965 } 1966 1967 /** 1968 * e1000e_get_phy_info_igp - Retrieve igp PHY information 1969 * @hw: pointer to the HW structure 1970 * 1971 * Read PHY status to determine if link is up. If link is up, then 1972 * set/determine 10base-T extended distance and polarity correction. Read 1973 * PHY port status to determine MDI/MDIx and speed. Based on the speed, 1974 * determine on the cable length, local and remote receiver. 1975 **/ 1976 s32 e1000e_get_phy_info_igp(struct e1000_hw *hw) 1977 { 1978 struct e1000_phy_info *phy = &hw->phy; 1979 s32 ret_val; 1980 u16 data; 1981 bool link; 1982 1983 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link); 1984 if (ret_val) 1985 return ret_val; 1986 1987 if (!link) { 1988 e_dbg("Phy info is only valid if link is up\n"); 1989 return -E1000_ERR_CONFIG; 1990 } 1991 1992 phy->polarity_correction = true; 1993 1994 ret_val = e1000_check_polarity_igp(hw); 1995 if (ret_val) 1996 return ret_val; 1997 1998 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data); 1999 if (ret_val) 2000 return ret_val; 2001 2002 phy->is_mdix = (data & IGP01E1000_PSSR_MDIX); 2003 2004 if ((data & IGP01E1000_PSSR_SPEED_MASK) == 2005 IGP01E1000_PSSR_SPEED_1000MBPS) { 2006 ret_val = e1000_get_cable_length(hw); 2007 if (ret_val) 2008 return ret_val; 2009 2010 ret_val = e1e_rphy(hw, PHY_1000T_STATUS, &data); 2011 if (ret_val) 2012 return ret_val; 2013 2014 phy->local_rx = (data & SR_1000T_LOCAL_RX_STATUS) 2015 ? e1000_1000t_rx_status_ok 2016 : e1000_1000t_rx_status_not_ok; 2017 2018 phy->remote_rx = (data & SR_1000T_REMOTE_RX_STATUS) 2019 ? e1000_1000t_rx_status_ok 2020 : e1000_1000t_rx_status_not_ok; 2021 } else { 2022 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED; 2023 phy->local_rx = e1000_1000t_rx_status_undefined; 2024 phy->remote_rx = e1000_1000t_rx_status_undefined; 2025 } 2026 2027 return ret_val; 2028 } 2029 2030 /** 2031 * e1000_get_phy_info_ife - Retrieves various IFE PHY states 2032 * @hw: pointer to the HW structure 2033 * 2034 * Populates "phy" structure with various feature states. 2035 **/ 2036 s32 e1000_get_phy_info_ife(struct e1000_hw *hw) 2037 { 2038 struct e1000_phy_info *phy = &hw->phy; 2039 s32 ret_val; 2040 u16 data; 2041 bool link; 2042 2043 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link); 2044 if (ret_val) 2045 return ret_val; 2046 2047 if (!link) { 2048 e_dbg("Phy info is only valid if link is up\n"); 2049 return -E1000_ERR_CONFIG; 2050 } 2051 2052 ret_val = e1e_rphy(hw, IFE_PHY_SPECIAL_CONTROL, &data); 2053 if (ret_val) 2054 return ret_val; 2055 phy->polarity_correction = (data & IFE_PSC_AUTO_POLARITY_DISABLE) 2056 ? false : true; 2057 2058 if (phy->polarity_correction) { 2059 ret_val = e1000_check_polarity_ife(hw); 2060 if (ret_val) 2061 return ret_val; 2062 } else { 2063 /* Polarity is forced */ 2064 phy->cable_polarity = (data & IFE_PSC_FORCE_POLARITY) 2065 ? e1000_rev_polarity_reversed 2066 : e1000_rev_polarity_normal; 2067 } 2068 2069 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data); 2070 if (ret_val) 2071 return ret_val; 2072 2073 phy->is_mdix = (data & IFE_PMC_MDIX_STATUS) ? true : false; 2074 2075 /* The following parameters are undefined for 10/100 operation. */ 2076 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED; 2077 phy->local_rx = e1000_1000t_rx_status_undefined; 2078 phy->remote_rx = e1000_1000t_rx_status_undefined; 2079 2080 return 0; 2081 } 2082 2083 /** 2084 * e1000e_phy_sw_reset - PHY software reset 2085 * @hw: pointer to the HW structure 2086 * 2087 * Does a software reset of the PHY by reading the PHY control register and 2088 * setting/write the control register reset bit to the PHY. 2089 **/ 2090 s32 e1000e_phy_sw_reset(struct e1000_hw *hw) 2091 { 2092 s32 ret_val; 2093 u16 phy_ctrl; 2094 2095 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_ctrl); 2096 if (ret_val) 2097 return ret_val; 2098 2099 phy_ctrl |= MII_CR_RESET; 2100 ret_val = e1e_wphy(hw, PHY_CONTROL, phy_ctrl); 2101 if (ret_val) 2102 return ret_val; 2103 2104 udelay(1); 2105 2106 return ret_val; 2107 } 2108 2109 /** 2110 * e1000e_phy_hw_reset_generic - PHY hardware reset 2111 * @hw: pointer to the HW structure 2112 * 2113 * Verify the reset block is not blocking us from resetting. Acquire 2114 * semaphore (if necessary) and read/set/write the device control reset 2115 * bit in the PHY. Wait the appropriate delay time for the device to 2116 * reset and release the semaphore (if necessary). 2117 **/ 2118 s32 e1000e_phy_hw_reset_generic(struct e1000_hw *hw) 2119 { 2120 struct e1000_phy_info *phy = &hw->phy; 2121 s32 ret_val; 2122 u32 ctrl; 2123 2124 ret_val = phy->ops.check_reset_block(hw); 2125 if (ret_val) 2126 return 0; 2127 2128 ret_val = phy->ops.acquire(hw); 2129 if (ret_val) 2130 return ret_val; 2131 2132 ctrl = er32(CTRL); 2133 ew32(CTRL, ctrl | E1000_CTRL_PHY_RST); 2134 e1e_flush(); 2135 2136 udelay(phy->reset_delay_us); 2137 2138 ew32(CTRL, ctrl); 2139 e1e_flush(); 2140 2141 udelay(150); 2142 2143 phy->ops.release(hw); 2144 2145 return e1000_get_phy_cfg_done(hw); 2146 } 2147 2148 /** 2149 * e1000e_get_cfg_done - Generic configuration done 2150 * @hw: pointer to the HW structure 2151 * 2152 * Generic function to wait 10 milli-seconds for configuration to complete 2153 * and return success. 2154 **/ 2155 s32 e1000e_get_cfg_done(struct e1000_hw *hw) 2156 { 2157 mdelay(10); 2158 2159 return 0; 2160 } 2161 2162 /** 2163 * e1000e_phy_init_script_igp3 - Inits the IGP3 PHY 2164 * @hw: pointer to the HW structure 2165 * 2166 * Initializes a Intel Gigabit PHY3 when an EEPROM is not present. 2167 **/ 2168 s32 e1000e_phy_init_script_igp3(struct e1000_hw *hw) 2169 { 2170 e_dbg("Running IGP 3 PHY init script\n"); 2171 2172 /* PHY init IGP 3 */ 2173 /* Enable rise/fall, 10-mode work in class-A */ 2174 e1e_wphy(hw, 0x2F5B, 0x9018); 2175 /* Remove all caps from Replica path filter */ 2176 e1e_wphy(hw, 0x2F52, 0x0000); 2177 /* Bias trimming for ADC, AFE and Driver (Default) */ 2178 e1e_wphy(hw, 0x2FB1, 0x8B24); 2179 /* Increase Hybrid poly bias */ 2180 e1e_wphy(hw, 0x2FB2, 0xF8F0); 2181 /* Add 4% to Tx amplitude in Gig mode */ 2182 e1e_wphy(hw, 0x2010, 0x10B0); 2183 /* Disable trimming (TTT) */ 2184 e1e_wphy(hw, 0x2011, 0x0000); 2185 /* Poly DC correction to 94.6% + 2% for all channels */ 2186 e1e_wphy(hw, 0x20DD, 0x249A); 2187 /* ABS DC correction to 95.9% */ 2188 e1e_wphy(hw, 0x20DE, 0x00D3); 2189 /* BG temp curve trim */ 2190 e1e_wphy(hw, 0x28B4, 0x04CE); 2191 /* Increasing ADC OPAMP stage 1 currents to max */ 2192 e1e_wphy(hw, 0x2F70, 0x29E4); 2193 /* Force 1000 ( required for enabling PHY regs configuration) */ 2194 e1e_wphy(hw, 0x0000, 0x0140); 2195 /* Set upd_freq to 6 */ 2196 e1e_wphy(hw, 0x1F30, 0x1606); 2197 /* Disable NPDFE */ 2198 e1e_wphy(hw, 0x1F31, 0xB814); 2199 /* Disable adaptive fixed FFE (Default) */ 2200 e1e_wphy(hw, 0x1F35, 0x002A); 2201 /* Enable FFE hysteresis */ 2202 e1e_wphy(hw, 0x1F3E, 0x0067); 2203 /* Fixed FFE for short cable lengths */ 2204 e1e_wphy(hw, 0x1F54, 0x0065); 2205 /* Fixed FFE for medium cable lengths */ 2206 e1e_wphy(hw, 0x1F55, 0x002A); 2207 /* Fixed FFE for long cable lengths */ 2208 e1e_wphy(hw, 0x1F56, 0x002A); 2209 /* Enable Adaptive Clip Threshold */ 2210 e1e_wphy(hw, 0x1F72, 0x3FB0); 2211 /* AHT reset limit to 1 */ 2212 e1e_wphy(hw, 0x1F76, 0xC0FF); 2213 /* Set AHT master delay to 127 msec */ 2214 e1e_wphy(hw, 0x1F77, 0x1DEC); 2215 /* Set scan bits for AHT */ 2216 e1e_wphy(hw, 0x1F78, 0xF9EF); 2217 /* Set AHT Preset bits */ 2218 e1e_wphy(hw, 0x1F79, 0x0210); 2219 /* Change integ_factor of channel A to 3 */ 2220 e1e_wphy(hw, 0x1895, 0x0003); 2221 /* Change prop_factor of channels BCD to 8 */ 2222 e1e_wphy(hw, 0x1796, 0x0008); 2223 /* Change cg_icount + enable integbp for channels BCD */ 2224 e1e_wphy(hw, 0x1798, 0xD008); 2225 /* 2226 * Change cg_icount + enable integbp + change prop_factor_master 2227 * to 8 for channel A 2228 */ 2229 e1e_wphy(hw, 0x1898, 0xD918); 2230 /* Disable AHT in Slave mode on channel A */ 2231 e1e_wphy(hw, 0x187A, 0x0800); 2232 /* 2233 * Enable LPLU and disable AN to 1000 in non-D0a states, 2234 * Enable SPD+B2B 2235 */ 2236 e1e_wphy(hw, 0x0019, 0x008D); 2237 /* Enable restart AN on an1000_dis change */ 2238 e1e_wphy(hw, 0x001B, 0x2080); 2239 /* Enable wh_fifo read clock in 10/100 modes */ 2240 e1e_wphy(hw, 0x0014, 0x0045); 2241 /* Restart AN, Speed selection is 1000 */ 2242 e1e_wphy(hw, 0x0000, 0x1340); 2243 2244 return 0; 2245 } 2246 2247 /* Internal function pointers */ 2248 2249 /** 2250 * e1000_get_phy_cfg_done - Generic PHY configuration done 2251 * @hw: pointer to the HW structure 2252 * 2253 * Return success if silicon family did not implement a family specific 2254 * get_cfg_done function. 2255 **/ 2256 static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw) 2257 { 2258 if (hw->phy.ops.get_cfg_done) 2259 return hw->phy.ops.get_cfg_done(hw); 2260 2261 return 0; 2262 } 2263 2264 /** 2265 * e1000_phy_force_speed_duplex - Generic force PHY speed/duplex 2266 * @hw: pointer to the HW structure 2267 * 2268 * When the silicon family has not implemented a forced speed/duplex 2269 * function for the PHY, simply return 0. 2270 **/ 2271 static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw) 2272 { 2273 if (hw->phy.ops.force_speed_duplex) 2274 return hw->phy.ops.force_speed_duplex(hw); 2275 2276 return 0; 2277 } 2278 2279 /** 2280 * e1000e_get_phy_type_from_id - Get PHY type from id 2281 * @phy_id: phy_id read from the phy 2282 * 2283 * Returns the phy type from the id. 2284 **/ 2285 enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id) 2286 { 2287 enum e1000_phy_type phy_type = e1000_phy_unknown; 2288 2289 switch (phy_id) { 2290 case M88E1000_I_PHY_ID: 2291 case M88E1000_E_PHY_ID: 2292 case M88E1111_I_PHY_ID: 2293 case M88E1011_I_PHY_ID: 2294 phy_type = e1000_phy_m88; 2295 break; 2296 case IGP01E1000_I_PHY_ID: /* IGP 1 & 2 share this */ 2297 phy_type = e1000_phy_igp_2; 2298 break; 2299 case GG82563_E_PHY_ID: 2300 phy_type = e1000_phy_gg82563; 2301 break; 2302 case IGP03E1000_E_PHY_ID: 2303 phy_type = e1000_phy_igp_3; 2304 break; 2305 case IFE_E_PHY_ID: 2306 case IFE_PLUS_E_PHY_ID: 2307 case IFE_C_E_PHY_ID: 2308 phy_type = e1000_phy_ife; 2309 break; 2310 case BME1000_E_PHY_ID: 2311 case BME1000_E_PHY_ID_R2: 2312 phy_type = e1000_phy_bm; 2313 break; 2314 case I82578_E_PHY_ID: 2315 phy_type = e1000_phy_82578; 2316 break; 2317 case I82577_E_PHY_ID: 2318 phy_type = e1000_phy_82577; 2319 break; 2320 case I82579_E_PHY_ID: 2321 phy_type = e1000_phy_82579; 2322 break; 2323 default: 2324 phy_type = e1000_phy_unknown; 2325 break; 2326 } 2327 return phy_type; 2328 } 2329 2330 /** 2331 * e1000e_determine_phy_address - Determines PHY address. 2332 * @hw: pointer to the HW structure 2333 * 2334 * This uses a trial and error method to loop through possible PHY 2335 * addresses. It tests each by reading the PHY ID registers and 2336 * checking for a match. 2337 **/ 2338 s32 e1000e_determine_phy_address(struct e1000_hw *hw) 2339 { 2340 u32 phy_addr = 0; 2341 u32 i; 2342 enum e1000_phy_type phy_type = e1000_phy_unknown; 2343 2344 hw->phy.id = phy_type; 2345 2346 for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) { 2347 hw->phy.addr = phy_addr; 2348 i = 0; 2349 2350 do { 2351 e1000e_get_phy_id(hw); 2352 phy_type = e1000e_get_phy_type_from_id(hw->phy.id); 2353 2354 /* 2355 * If phy_type is valid, break - we found our 2356 * PHY address 2357 */ 2358 if (phy_type != e1000_phy_unknown) 2359 return 0; 2360 2361 usleep_range(1000, 2000); 2362 i++; 2363 } while (i < 10); 2364 } 2365 2366 return -E1000_ERR_PHY_TYPE; 2367 } 2368 2369 /** 2370 * e1000_get_phy_addr_for_bm_page - Retrieve PHY page address 2371 * @page: page to access 2372 * 2373 * Returns the phy address for the page requested. 2374 **/ 2375 static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg) 2376 { 2377 u32 phy_addr = 2; 2378 2379 if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31)) 2380 phy_addr = 1; 2381 2382 return phy_addr; 2383 } 2384 2385 /** 2386 * e1000e_write_phy_reg_bm - Write BM PHY register 2387 * @hw: pointer to the HW structure 2388 * @offset: register offset to write to 2389 * @data: data to write at register offset 2390 * 2391 * Acquires semaphore, if necessary, then writes the data to PHY register 2392 * at the offset. Release any acquired semaphores before exiting. 2393 **/ 2394 s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data) 2395 { 2396 s32 ret_val; 2397 u32 page = offset >> IGP_PAGE_SHIFT; 2398 2399 ret_val = hw->phy.ops.acquire(hw); 2400 if (ret_val) 2401 return ret_val; 2402 2403 /* Page 800 works differently than the rest so it has its own func */ 2404 if (page == BM_WUC_PAGE) { 2405 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, 2406 false, false); 2407 goto release; 2408 } 2409 2410 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset); 2411 2412 if (offset > MAX_PHY_MULTI_PAGE_REG) { 2413 u32 page_shift, page_select; 2414 2415 /* 2416 * Page select is register 31 for phy address 1 and 22 for 2417 * phy address 2 and 3. Page select is shifted only for 2418 * phy address 1. 2419 */ 2420 if (hw->phy.addr == 1) { 2421 page_shift = IGP_PAGE_SHIFT; 2422 page_select = IGP01E1000_PHY_PAGE_SELECT; 2423 } else { 2424 page_shift = 0; 2425 page_select = BM_PHY_PAGE_SELECT; 2426 } 2427 2428 /* Page is shifted left, PHY expects (page x 32) */ 2429 ret_val = e1000e_write_phy_reg_mdic(hw, page_select, 2430 (page << page_shift)); 2431 if (ret_val) 2432 goto release; 2433 } 2434 2435 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 2436 data); 2437 2438 release: 2439 hw->phy.ops.release(hw); 2440 return ret_val; 2441 } 2442 2443 /** 2444 * e1000e_read_phy_reg_bm - Read BM PHY register 2445 * @hw: pointer to the HW structure 2446 * @offset: register offset to be read 2447 * @data: pointer to the read data 2448 * 2449 * Acquires semaphore, if necessary, then reads the PHY register at offset 2450 * and storing the retrieved information in data. Release any acquired 2451 * semaphores before exiting. 2452 **/ 2453 s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data) 2454 { 2455 s32 ret_val; 2456 u32 page = offset >> IGP_PAGE_SHIFT; 2457 2458 ret_val = hw->phy.ops.acquire(hw); 2459 if (ret_val) 2460 return ret_val; 2461 2462 /* Page 800 works differently than the rest so it has its own func */ 2463 if (page == BM_WUC_PAGE) { 2464 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, 2465 true, false); 2466 goto release; 2467 } 2468 2469 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset); 2470 2471 if (offset > MAX_PHY_MULTI_PAGE_REG) { 2472 u32 page_shift, page_select; 2473 2474 /* 2475 * Page select is register 31 for phy address 1 and 22 for 2476 * phy address 2 and 3. Page select is shifted only for 2477 * phy address 1. 2478 */ 2479 if (hw->phy.addr == 1) { 2480 page_shift = IGP_PAGE_SHIFT; 2481 page_select = IGP01E1000_PHY_PAGE_SELECT; 2482 } else { 2483 page_shift = 0; 2484 page_select = BM_PHY_PAGE_SELECT; 2485 } 2486 2487 /* Page is shifted left, PHY expects (page x 32) */ 2488 ret_val = e1000e_write_phy_reg_mdic(hw, page_select, 2489 (page << page_shift)); 2490 if (ret_val) 2491 goto release; 2492 } 2493 2494 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 2495 data); 2496 release: 2497 hw->phy.ops.release(hw); 2498 return ret_val; 2499 } 2500 2501 /** 2502 * e1000e_read_phy_reg_bm2 - Read BM PHY register 2503 * @hw: pointer to the HW structure 2504 * @offset: register offset to be read 2505 * @data: pointer to the read data 2506 * 2507 * Acquires semaphore, if necessary, then reads the PHY register at offset 2508 * and storing the retrieved information in data. Release any acquired 2509 * semaphores before exiting. 2510 **/ 2511 s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data) 2512 { 2513 s32 ret_val; 2514 u16 page = (u16)(offset >> IGP_PAGE_SHIFT); 2515 2516 ret_val = hw->phy.ops.acquire(hw); 2517 if (ret_val) 2518 return ret_val; 2519 2520 /* Page 800 works differently than the rest so it has its own func */ 2521 if (page == BM_WUC_PAGE) { 2522 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, 2523 true, false); 2524 goto release; 2525 } 2526 2527 hw->phy.addr = 1; 2528 2529 if (offset > MAX_PHY_MULTI_PAGE_REG) { 2530 2531 /* Page is shifted left, PHY expects (page x 32) */ 2532 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT, 2533 page); 2534 2535 if (ret_val) 2536 goto release; 2537 } 2538 2539 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 2540 data); 2541 release: 2542 hw->phy.ops.release(hw); 2543 return ret_val; 2544 } 2545 2546 /** 2547 * e1000e_write_phy_reg_bm2 - Write BM PHY register 2548 * @hw: pointer to the HW structure 2549 * @offset: register offset to write to 2550 * @data: data to write at register offset 2551 * 2552 * Acquires semaphore, if necessary, then writes the data to PHY register 2553 * at the offset. Release any acquired semaphores before exiting. 2554 **/ 2555 s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data) 2556 { 2557 s32 ret_val; 2558 u16 page = (u16)(offset >> IGP_PAGE_SHIFT); 2559 2560 ret_val = hw->phy.ops.acquire(hw); 2561 if (ret_val) 2562 return ret_val; 2563 2564 /* Page 800 works differently than the rest so it has its own func */ 2565 if (page == BM_WUC_PAGE) { 2566 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, 2567 false, false); 2568 goto release; 2569 } 2570 2571 hw->phy.addr = 1; 2572 2573 if (offset > MAX_PHY_MULTI_PAGE_REG) { 2574 /* Page is shifted left, PHY expects (page x 32) */ 2575 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT, 2576 page); 2577 2578 if (ret_val) 2579 goto release; 2580 } 2581 2582 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset, 2583 data); 2584 2585 release: 2586 hw->phy.ops.release(hw); 2587 return ret_val; 2588 } 2589 2590 /** 2591 * e1000_enable_phy_wakeup_reg_access_bm - enable access to BM wakeup registers 2592 * @hw: pointer to the HW structure 2593 * @phy_reg: pointer to store original contents of BM_WUC_ENABLE_REG 2594 * 2595 * Assumes semaphore already acquired and phy_reg points to a valid memory 2596 * address to store contents of the BM_WUC_ENABLE_REG register. 2597 **/ 2598 s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg) 2599 { 2600 s32 ret_val; 2601 u16 temp; 2602 2603 /* All page select, port ctrl and wakeup registers use phy address 1 */ 2604 hw->phy.addr = 1; 2605 2606 /* Select Port Control Registers page */ 2607 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT)); 2608 if (ret_val) { 2609 e_dbg("Could not set Port Control page\n"); 2610 return ret_val; 2611 } 2612 2613 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg); 2614 if (ret_val) { 2615 e_dbg("Could not read PHY register %d.%d\n", 2616 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); 2617 return ret_val; 2618 } 2619 2620 /* 2621 * Enable both PHY wakeup mode and Wakeup register page writes. 2622 * Prevent a power state change by disabling ME and Host PHY wakeup. 2623 */ 2624 temp = *phy_reg; 2625 temp |= BM_WUC_ENABLE_BIT; 2626 temp &= ~(BM_WUC_ME_WU_BIT | BM_WUC_HOST_WU_BIT); 2627 2628 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, temp); 2629 if (ret_val) { 2630 e_dbg("Could not write PHY register %d.%d\n", 2631 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); 2632 return ret_val; 2633 } 2634 2635 /* 2636 * Select Host Wakeup Registers page - caller now able to write 2637 * registers on the Wakeup registers page 2638 */ 2639 return e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT)); 2640 } 2641 2642 /** 2643 * e1000_disable_phy_wakeup_reg_access_bm - disable access to BM wakeup regs 2644 * @hw: pointer to the HW structure 2645 * @phy_reg: pointer to original contents of BM_WUC_ENABLE_REG 2646 * 2647 * Restore BM_WUC_ENABLE_REG to its original value. 2648 * 2649 * Assumes semaphore already acquired and *phy_reg is the contents of the 2650 * BM_WUC_ENABLE_REG before register(s) on BM_WUC_PAGE were accessed by 2651 * caller. 2652 **/ 2653 s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg) 2654 { 2655 s32 ret_val = 0; 2656 2657 /* Select Port Control Registers page */ 2658 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT)); 2659 if (ret_val) { 2660 e_dbg("Could not set Port Control page\n"); 2661 return ret_val; 2662 } 2663 2664 /* Restore 769.17 to its original value */ 2665 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, *phy_reg); 2666 if (ret_val) 2667 e_dbg("Could not restore PHY register %d.%d\n", 2668 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); 2669 2670 return ret_val; 2671 } 2672 2673 /** 2674 * e1000_access_phy_wakeup_reg_bm - Read/write BM PHY wakeup register 2675 * @hw: pointer to the HW structure 2676 * @offset: register offset to be read or written 2677 * @data: pointer to the data to read or write 2678 * @read: determines if operation is read or write 2679 * @page_set: BM_WUC_PAGE already set and access enabled 2680 * 2681 * Read the PHY register at offset and store the retrieved information in 2682 * data, or write data to PHY register at offset. Note the procedure to 2683 * access the PHY wakeup registers is different than reading the other PHY 2684 * registers. It works as such: 2685 * 1) Set 769.17.2 (page 769, register 17, bit 2) = 1 2686 * 2) Set page to 800 for host (801 if we were manageability) 2687 * 3) Write the address using the address opcode (0x11) 2688 * 4) Read or write the data using the data opcode (0x12) 2689 * 5) Restore 769.17.2 to its original value 2690 * 2691 * Steps 1 and 2 are done by e1000_enable_phy_wakeup_reg_access_bm() and 2692 * step 5 is done by e1000_disable_phy_wakeup_reg_access_bm(). 2693 * 2694 * Assumes semaphore is already acquired. When page_set==true, assumes 2695 * the PHY page is set to BM_WUC_PAGE (i.e. a function in the call stack 2696 * is responsible for calls to e1000_[enable|disable]_phy_wakeup_reg_bm()). 2697 **/ 2698 static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset, 2699 u16 *data, bool read, bool page_set) 2700 { 2701 s32 ret_val; 2702 u16 reg = BM_PHY_REG_NUM(offset); 2703 u16 page = BM_PHY_REG_PAGE(offset); 2704 u16 phy_reg = 0; 2705 2706 /* Gig must be disabled for MDIO accesses to Host Wakeup reg page */ 2707 if ((hw->mac.type == e1000_pchlan) && 2708 (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE))) 2709 e_dbg("Attempting to access page %d while gig enabled.\n", 2710 page); 2711 2712 if (!page_set) { 2713 /* Enable access to PHY wakeup registers */ 2714 ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg); 2715 if (ret_val) { 2716 e_dbg("Could not enable PHY wakeup reg access\n"); 2717 return ret_val; 2718 } 2719 } 2720 2721 e_dbg("Accessing PHY page %d reg 0x%x\n", page, reg); 2722 2723 /* Write the Wakeup register page offset value using opcode 0x11 */ 2724 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg); 2725 if (ret_val) { 2726 e_dbg("Could not write address opcode to page %d\n", page); 2727 return ret_val; 2728 } 2729 2730 if (read) { 2731 /* Read the Wakeup register page value using opcode 0x12 */ 2732 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE, 2733 data); 2734 } else { 2735 /* Write the Wakeup register page value using opcode 0x12 */ 2736 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE, 2737 *data); 2738 } 2739 2740 if (ret_val) { 2741 e_dbg("Could not access PHY reg %d.%d\n", page, reg); 2742 return ret_val; 2743 } 2744 2745 if (!page_set) 2746 ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg); 2747 2748 return ret_val; 2749 } 2750 2751 /** 2752 * e1000_power_up_phy_copper - Restore copper link in case of PHY power down 2753 * @hw: pointer to the HW structure 2754 * 2755 * In the case of a PHY power down to save power, or to turn off link during a 2756 * driver unload, or wake on lan is not enabled, restore the link to previous 2757 * settings. 2758 **/ 2759 void e1000_power_up_phy_copper(struct e1000_hw *hw) 2760 { 2761 u16 mii_reg = 0; 2762 2763 /* The PHY will retain its settings across a power down/up cycle */ 2764 e1e_rphy(hw, PHY_CONTROL, &mii_reg); 2765 mii_reg &= ~MII_CR_POWER_DOWN; 2766 e1e_wphy(hw, PHY_CONTROL, mii_reg); 2767 } 2768 2769 /** 2770 * e1000_power_down_phy_copper - Restore copper link in case of PHY power down 2771 * @hw: pointer to the HW structure 2772 * 2773 * In the case of a PHY power down to save power, or to turn off link during a 2774 * driver unload, or wake on lan is not enabled, restore the link to previous 2775 * settings. 2776 **/ 2777 void e1000_power_down_phy_copper(struct e1000_hw *hw) 2778 { 2779 u16 mii_reg = 0; 2780 2781 /* The PHY will retain its settings across a power down/up cycle */ 2782 e1e_rphy(hw, PHY_CONTROL, &mii_reg); 2783 mii_reg |= MII_CR_POWER_DOWN; 2784 e1e_wphy(hw, PHY_CONTROL, mii_reg); 2785 usleep_range(1000, 2000); 2786 } 2787 2788 /** 2789 * e1000e_commit_phy - Soft PHY reset 2790 * @hw: pointer to the HW structure 2791 * 2792 * Performs a soft PHY reset on those that apply. This is a function pointer 2793 * entry point called by drivers. 2794 **/ 2795 s32 e1000e_commit_phy(struct e1000_hw *hw) 2796 { 2797 if (hw->phy.ops.commit) 2798 return hw->phy.ops.commit(hw); 2799 2800 return 0; 2801 } 2802 2803 /** 2804 * e1000_set_d0_lplu_state - Sets low power link up state for D0 2805 * @hw: pointer to the HW structure 2806 * @active: boolean used to enable/disable lplu 2807 * 2808 * Success returns 0, Failure returns 1 2809 * 2810 * The low power link up (lplu) state is set to the power management level D0 2811 * and SmartSpeed is disabled when active is true, else clear lplu for D0 2812 * and enable Smartspeed. LPLU and Smartspeed are mutually exclusive. LPLU 2813 * is used during Dx states where the power conservation is most important. 2814 * During driver activity, SmartSpeed should be enabled so performance is 2815 * maintained. This is a function pointer entry point called by drivers. 2816 **/ 2817 static s32 e1000_set_d0_lplu_state(struct e1000_hw *hw, bool active) 2818 { 2819 if (hw->phy.ops.set_d0_lplu_state) 2820 return hw->phy.ops.set_d0_lplu_state(hw, active); 2821 2822 return 0; 2823 } 2824 2825 /** 2826 * __e1000_read_phy_reg_hv - Read HV PHY register 2827 * @hw: pointer to the HW structure 2828 * @offset: register offset to be read 2829 * @data: pointer to the read data 2830 * @locked: semaphore has already been acquired or not 2831 * 2832 * Acquires semaphore, if necessary, then reads the PHY register at offset 2833 * and stores the retrieved information in data. Release any acquired 2834 * semaphore before exiting. 2835 **/ 2836 static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, 2837 bool locked, bool page_set) 2838 { 2839 s32 ret_val; 2840 u16 page = BM_PHY_REG_PAGE(offset); 2841 u16 reg = BM_PHY_REG_NUM(offset); 2842 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); 2843 2844 if (!locked) { 2845 ret_val = hw->phy.ops.acquire(hw); 2846 if (ret_val) 2847 return ret_val; 2848 } 2849 2850 /* Page 800 works differently than the rest so it has its own func */ 2851 if (page == BM_WUC_PAGE) { 2852 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, 2853 true, page_set); 2854 goto out; 2855 } 2856 2857 if (page > 0 && page < HV_INTC_FC_PAGE_START) { 2858 ret_val = e1000_access_phy_debug_regs_hv(hw, offset, 2859 data, true); 2860 goto out; 2861 } 2862 2863 if (!page_set) { 2864 if (page == HV_INTC_FC_PAGE_START) 2865 page = 0; 2866 2867 if (reg > MAX_PHY_MULTI_PAGE_REG) { 2868 /* Page is shifted left, PHY expects (page x 32) */ 2869 ret_val = e1000_set_page_igp(hw, 2870 (page << IGP_PAGE_SHIFT)); 2871 2872 hw->phy.addr = phy_addr; 2873 2874 if (ret_val) 2875 goto out; 2876 } 2877 } 2878 2879 e_dbg("reading PHY page %d (or 0x%x shifted) reg 0x%x\n", page, 2880 page << IGP_PAGE_SHIFT, reg); 2881 2882 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, 2883 data); 2884 out: 2885 if (!locked) 2886 hw->phy.ops.release(hw); 2887 2888 return ret_val; 2889 } 2890 2891 /** 2892 * e1000_read_phy_reg_hv - Read HV PHY register 2893 * @hw: pointer to the HW structure 2894 * @offset: register offset to be read 2895 * @data: pointer to the read data 2896 * 2897 * Acquires semaphore then reads the PHY register at offset and stores 2898 * the retrieved information in data. Release the acquired semaphore 2899 * before exiting. 2900 **/ 2901 s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data) 2902 { 2903 return __e1000_read_phy_reg_hv(hw, offset, data, false, false); 2904 } 2905 2906 /** 2907 * e1000_read_phy_reg_hv_locked - Read HV PHY register 2908 * @hw: pointer to the HW structure 2909 * @offset: register offset to be read 2910 * @data: pointer to the read data 2911 * 2912 * Reads the PHY register at offset and stores the retrieved information 2913 * in data. Assumes semaphore already acquired. 2914 **/ 2915 s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data) 2916 { 2917 return __e1000_read_phy_reg_hv(hw, offset, data, true, false); 2918 } 2919 2920 /** 2921 * e1000_read_phy_reg_page_hv - Read HV PHY register 2922 * @hw: pointer to the HW structure 2923 * @offset: register offset to write to 2924 * @data: data to write at register offset 2925 * 2926 * Reads the PHY register at offset and stores the retrieved information 2927 * in data. Assumes semaphore already acquired and page already set. 2928 **/ 2929 s32 e1000_read_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 *data) 2930 { 2931 return __e1000_read_phy_reg_hv(hw, offset, data, true, true); 2932 } 2933 2934 /** 2935 * __e1000_write_phy_reg_hv - Write HV PHY register 2936 * @hw: pointer to the HW structure 2937 * @offset: register offset to write to 2938 * @data: data to write at register offset 2939 * @locked: semaphore has already been acquired or not 2940 * 2941 * Acquires semaphore, if necessary, then writes the data to PHY register 2942 * at the offset. Release any acquired semaphores before exiting. 2943 **/ 2944 static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, 2945 bool locked, bool page_set) 2946 { 2947 s32 ret_val; 2948 u16 page = BM_PHY_REG_PAGE(offset); 2949 u16 reg = BM_PHY_REG_NUM(offset); 2950 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); 2951 2952 if (!locked) { 2953 ret_val = hw->phy.ops.acquire(hw); 2954 if (ret_val) 2955 return ret_val; 2956 } 2957 2958 /* Page 800 works differently than the rest so it has its own func */ 2959 if (page == BM_WUC_PAGE) { 2960 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, 2961 false, page_set); 2962 goto out; 2963 } 2964 2965 if (page > 0 && page < HV_INTC_FC_PAGE_START) { 2966 ret_val = e1000_access_phy_debug_regs_hv(hw, offset, 2967 &data, false); 2968 goto out; 2969 } 2970 2971 if (!page_set) { 2972 if (page == HV_INTC_FC_PAGE_START) 2973 page = 0; 2974 2975 /* 2976 * Workaround MDIO accesses being disabled after entering IEEE 2977 * Power Down (when bit 11 of the PHY Control register is set) 2978 */ 2979 if ((hw->phy.type == e1000_phy_82578) && 2980 (hw->phy.revision >= 1) && 2981 (hw->phy.addr == 2) && 2982 ((MAX_PHY_REG_ADDRESS & reg) == 0) && (data & (1 << 11))) { 2983 u16 data2 = 0x7EFF; 2984 ret_val = e1000_access_phy_debug_regs_hv(hw, 2985 (1 << 6) | 0x3, 2986 &data2, false); 2987 if (ret_val) 2988 goto out; 2989 } 2990 2991 if (reg > MAX_PHY_MULTI_PAGE_REG) { 2992 /* Page is shifted left, PHY expects (page x 32) */ 2993 ret_val = e1000_set_page_igp(hw, 2994 (page << IGP_PAGE_SHIFT)); 2995 2996 hw->phy.addr = phy_addr; 2997 2998 if (ret_val) 2999 goto out; 3000 } 3001 } 3002 3003 e_dbg("writing PHY page %d (or 0x%x shifted) reg 0x%x\n", page, 3004 page << IGP_PAGE_SHIFT, reg); 3005 3006 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, 3007 data); 3008 3009 out: 3010 if (!locked) 3011 hw->phy.ops.release(hw); 3012 3013 return ret_val; 3014 } 3015 3016 /** 3017 * e1000_write_phy_reg_hv - Write HV PHY register 3018 * @hw: pointer to the HW structure 3019 * @offset: register offset to write to 3020 * @data: data to write at register offset 3021 * 3022 * Acquires semaphore then writes the data to PHY register at the offset. 3023 * Release the acquired semaphores before exiting. 3024 **/ 3025 s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data) 3026 { 3027 return __e1000_write_phy_reg_hv(hw, offset, data, false, false); 3028 } 3029 3030 /** 3031 * e1000_write_phy_reg_hv_locked - Write HV PHY register 3032 * @hw: pointer to the HW structure 3033 * @offset: register offset to write to 3034 * @data: data to write at register offset 3035 * 3036 * Writes the data to PHY register at the offset. Assumes semaphore 3037 * already acquired. 3038 **/ 3039 s32 e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data) 3040 { 3041 return __e1000_write_phy_reg_hv(hw, offset, data, true, false); 3042 } 3043 3044 /** 3045 * e1000_write_phy_reg_page_hv - Write HV PHY register 3046 * @hw: pointer to the HW structure 3047 * @offset: register offset to write to 3048 * @data: data to write at register offset 3049 * 3050 * Writes the data to PHY register at the offset. Assumes semaphore 3051 * already acquired and page already set. 3052 **/ 3053 s32 e1000_write_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 data) 3054 { 3055 return __e1000_write_phy_reg_hv(hw, offset, data, true, true); 3056 } 3057 3058 /** 3059 * e1000_get_phy_addr_for_hv_page - Get PHY address based on page 3060 * @page: page to be accessed 3061 **/ 3062 static u32 e1000_get_phy_addr_for_hv_page(u32 page) 3063 { 3064 u32 phy_addr = 2; 3065 3066 if (page >= HV_INTC_FC_PAGE_START) 3067 phy_addr = 1; 3068 3069 return phy_addr; 3070 } 3071 3072 /** 3073 * e1000_access_phy_debug_regs_hv - Read HV PHY vendor specific high registers 3074 * @hw: pointer to the HW structure 3075 * @offset: register offset to be read or written 3076 * @data: pointer to the data to be read or written 3077 * @read: determines if operation is read or write 3078 * 3079 * Reads the PHY register at offset and stores the retreived information 3080 * in data. Assumes semaphore already acquired. Note that the procedure 3081 * to access these regs uses the address port and data port to read/write. 3082 * These accesses done with PHY address 2 and without using pages. 3083 **/ 3084 static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, 3085 u16 *data, bool read) 3086 { 3087 s32 ret_val; 3088 u32 addr_reg = 0; 3089 u32 data_reg = 0; 3090 3091 /* This takes care of the difference with desktop vs mobile phy */ 3092 addr_reg = (hw->phy.type == e1000_phy_82578) ? 3093 I82578_ADDR_REG : I82577_ADDR_REG; 3094 data_reg = addr_reg + 1; 3095 3096 /* All operations in this function are phy address 2 */ 3097 hw->phy.addr = 2; 3098 3099 /* masking with 0x3F to remove the page from offset */ 3100 ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F); 3101 if (ret_val) { 3102 e_dbg("Could not write the Address Offset port register\n"); 3103 return ret_val; 3104 } 3105 3106 /* Read or write the data value next */ 3107 if (read) 3108 ret_val = e1000e_read_phy_reg_mdic(hw, data_reg, data); 3109 else 3110 ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data); 3111 3112 if (ret_val) 3113 e_dbg("Could not access the Data port register\n"); 3114 3115 return ret_val; 3116 } 3117 3118 /** 3119 * e1000_link_stall_workaround_hv - Si workaround 3120 * @hw: pointer to the HW structure 3121 * 3122 * This function works around a Si bug where the link partner can get 3123 * a link up indication before the PHY does. If small packets are sent 3124 * by the link partner they can be placed in the packet buffer without 3125 * being properly accounted for by the PHY and will stall preventing 3126 * further packets from being received. The workaround is to clear the 3127 * packet buffer after the PHY detects link up. 3128 **/ 3129 s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw) 3130 { 3131 s32 ret_val = 0; 3132 u16 data; 3133 3134 if (hw->phy.type != e1000_phy_82578) 3135 return 0; 3136 3137 /* Do not apply workaround if in PHY loopback bit 14 set */ 3138 e1e_rphy(hw, PHY_CONTROL, &data); 3139 if (data & PHY_CONTROL_LB) 3140 return 0; 3141 3142 /* check if link is up and at 1Gbps */ 3143 ret_val = e1e_rphy(hw, BM_CS_STATUS, &data); 3144 if (ret_val) 3145 return ret_val; 3146 3147 data &= BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED | 3148 BM_CS_STATUS_SPEED_MASK; 3149 3150 if (data != (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED | 3151 BM_CS_STATUS_SPEED_1000)) 3152 return 0; 3153 3154 msleep(200); 3155 3156 /* flush the packets in the fifo buffer */ 3157 ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC | 3158 HV_MUX_DATA_CTRL_FORCE_SPEED); 3159 if (ret_val) 3160 return ret_val; 3161 3162 return e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC); 3163 } 3164 3165 /** 3166 * e1000_check_polarity_82577 - Checks the polarity. 3167 * @hw: pointer to the HW structure 3168 * 3169 * Success returns 0, Failure returns -E1000_ERR_PHY (-2) 3170 * 3171 * Polarity is determined based on the PHY specific status register. 3172 **/ 3173 s32 e1000_check_polarity_82577(struct e1000_hw *hw) 3174 { 3175 struct e1000_phy_info *phy = &hw->phy; 3176 s32 ret_val; 3177 u16 data; 3178 3179 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data); 3180 3181 if (!ret_val) 3182 phy->cable_polarity = (data & I82577_PHY_STATUS2_REV_POLARITY) 3183 ? e1000_rev_polarity_reversed 3184 : e1000_rev_polarity_normal; 3185 3186 return ret_val; 3187 } 3188 3189 /** 3190 * e1000_phy_force_speed_duplex_82577 - Force speed/duplex for I82577 PHY 3191 * @hw: pointer to the HW structure 3192 * 3193 * Calls the PHY setup function to force speed and duplex. 3194 **/ 3195 s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw) 3196 { 3197 struct e1000_phy_info *phy = &hw->phy; 3198 s32 ret_val; 3199 u16 phy_data; 3200 bool link; 3201 3202 ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_data); 3203 if (ret_val) 3204 return ret_val; 3205 3206 e1000e_phy_force_speed_duplex_setup(hw, &phy_data); 3207 3208 ret_val = e1e_wphy(hw, PHY_CONTROL, phy_data); 3209 if (ret_val) 3210 return ret_val; 3211 3212 udelay(1); 3213 3214 if (phy->autoneg_wait_to_complete) { 3215 e_dbg("Waiting for forced speed/duplex link on 82577 phy\n"); 3216 3217 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 3218 100000, &link); 3219 if (ret_val) 3220 return ret_val; 3221 3222 if (!link) 3223 e_dbg("Link taking longer than expected.\n"); 3224 3225 /* Try once more */ 3226 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT, 3227 100000, &link); 3228 } 3229 3230 return ret_val; 3231 } 3232 3233 /** 3234 * e1000_get_phy_info_82577 - Retrieve I82577 PHY information 3235 * @hw: pointer to the HW structure 3236 * 3237 * Read PHY status to determine if link is up. If link is up, then 3238 * set/determine 10base-T extended distance and polarity correction. Read 3239 * PHY port status to determine MDI/MDIx and speed. Based on the speed, 3240 * determine on the cable length, local and remote receiver. 3241 **/ 3242 s32 e1000_get_phy_info_82577(struct e1000_hw *hw) 3243 { 3244 struct e1000_phy_info *phy = &hw->phy; 3245 s32 ret_val; 3246 u16 data; 3247 bool link; 3248 3249 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link); 3250 if (ret_val) 3251 return ret_val; 3252 3253 if (!link) { 3254 e_dbg("Phy info is only valid if link is up\n"); 3255 return -E1000_ERR_CONFIG; 3256 } 3257 3258 phy->polarity_correction = true; 3259 3260 ret_val = e1000_check_polarity_82577(hw); 3261 if (ret_val) 3262 return ret_val; 3263 3264 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data); 3265 if (ret_val) 3266 return ret_val; 3267 3268 phy->is_mdix = (data & I82577_PHY_STATUS2_MDIX) ? true : false; 3269 3270 if ((data & I82577_PHY_STATUS2_SPEED_MASK) == 3271 I82577_PHY_STATUS2_SPEED_1000MBPS) { 3272 ret_val = hw->phy.ops.get_cable_length(hw); 3273 if (ret_val) 3274 return ret_val; 3275 3276 ret_val = e1e_rphy(hw, PHY_1000T_STATUS, &data); 3277 if (ret_val) 3278 return ret_val; 3279 3280 phy->local_rx = (data & SR_1000T_LOCAL_RX_STATUS) 3281 ? e1000_1000t_rx_status_ok 3282 : e1000_1000t_rx_status_not_ok; 3283 3284 phy->remote_rx = (data & SR_1000T_REMOTE_RX_STATUS) 3285 ? e1000_1000t_rx_status_ok 3286 : e1000_1000t_rx_status_not_ok; 3287 } else { 3288 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED; 3289 phy->local_rx = e1000_1000t_rx_status_undefined; 3290 phy->remote_rx = e1000_1000t_rx_status_undefined; 3291 } 3292 3293 return 0; 3294 } 3295 3296 /** 3297 * e1000_get_cable_length_82577 - Determine cable length for 82577 PHY 3298 * @hw: pointer to the HW structure 3299 * 3300 * Reads the diagnostic status register and verifies result is valid before 3301 * placing it in the phy_cable_length field. 3302 **/ 3303 s32 e1000_get_cable_length_82577(struct e1000_hw *hw) 3304 { 3305 struct e1000_phy_info *phy = &hw->phy; 3306 s32 ret_val; 3307 u16 phy_data, length; 3308 3309 ret_val = e1e_rphy(hw, I82577_PHY_DIAG_STATUS, &phy_data); 3310 if (ret_val) 3311 return ret_val; 3312 3313 length = (phy_data & I82577_DSTATUS_CABLE_LENGTH) >> 3314 I82577_DSTATUS_CABLE_LENGTH_SHIFT; 3315 3316 if (length == E1000_CABLE_LENGTH_UNDEFINED) 3317 ret_val = -E1000_ERR_PHY; 3318 3319 phy->cable_length = length; 3320 3321 return 0; 3322 } 3323