1 /* 2 * Copyright 2018 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #include <linux/delay.h> 27 28 #include "resource.h" 29 #include "dce_i2c.h" 30 #include "dce_i2c_hw.h" 31 #include "reg_helper.h" 32 #include "include/gpio_service_interface.h" 33 34 #define CTX \ 35 dce_i2c_hw->ctx 36 #define REG(reg)\ 37 dce_i2c_hw->regs->reg 38 39 #undef FN 40 #define FN(reg_name, field_name) \ 41 dce_i2c_hw->shifts->field_name, dce_i2c_hw->masks->field_name 42 43 static void execute_transaction( 44 struct dce_i2c_hw *dce_i2c_hw) 45 { 46 REG_UPDATE_N(SETUP, 5, 47 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_DATA_DRIVE_EN), 0, 48 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_CLK_DRIVE_EN), 0, 49 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_DATA_DRIVE_SEL), 0, 50 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_TRANSACTION_DELAY), 0, 51 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_INTRA_BYTE_DELAY), 0); 52 53 54 REG_UPDATE_5(DC_I2C_CONTROL, 55 DC_I2C_SOFT_RESET, 0, 56 DC_I2C_SW_STATUS_RESET, 0, 57 DC_I2C_SEND_RESET, 0, 58 DC_I2C_GO, 0, 59 DC_I2C_TRANSACTION_COUNT, dce_i2c_hw->transaction_count - 1); 60 61 /* start I2C transfer */ 62 REG_UPDATE(DC_I2C_CONTROL, DC_I2C_GO, 1); 63 64 /* all transactions were executed and HW buffer became empty 65 * (even though it actually happens when status becomes DONE) 66 */ 67 dce_i2c_hw->transaction_count = 0; 68 dce_i2c_hw->buffer_used_bytes = 0; 69 } 70 71 static enum i2c_channel_operation_result get_channel_status( 72 struct dce_i2c_hw *dce_i2c_hw, 73 uint8_t *returned_bytes) 74 { 75 uint32_t i2c_sw_status = 0; 76 uint32_t value = 77 REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status); 78 if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW) 79 return I2C_CHANNEL_OPERATION_ENGINE_BUSY; 80 else if (value & dce_i2c_hw->masks->DC_I2C_SW_STOPPED_ON_NACK) 81 return I2C_CHANNEL_OPERATION_NO_RESPONSE; 82 else if (value & dce_i2c_hw->masks->DC_I2C_SW_TIMEOUT) 83 return I2C_CHANNEL_OPERATION_TIMEOUT; 84 else if (value & dce_i2c_hw->masks->DC_I2C_SW_ABORTED) 85 return I2C_CHANNEL_OPERATION_FAILED; 86 else if (value & dce_i2c_hw->masks->DC_I2C_SW_DONE) 87 return I2C_CHANNEL_OPERATION_SUCCEEDED; 88 89 /* 90 * this is the case when HW used for communication, I2C_SW_STATUS 91 * could be zero 92 */ 93 return I2C_CHANNEL_OPERATION_SUCCEEDED; 94 } 95 96 static uint32_t get_hw_buffer_available_size( 97 const struct dce_i2c_hw *dce_i2c_hw) 98 { 99 return dce_i2c_hw->buffer_size - 100 dce_i2c_hw->buffer_used_bytes; 101 } 102 103 static void process_channel_reply( 104 struct dce_i2c_hw *dce_i2c_hw, 105 struct i2c_payload *reply) 106 { 107 uint32_t length = reply->length; 108 uint8_t *buffer = reply->data; 109 110 REG_SET_3(DC_I2C_DATA, 0, 111 DC_I2C_INDEX, dce_i2c_hw->buffer_used_write, 112 DC_I2C_DATA_RW, 1, 113 DC_I2C_INDEX_WRITE, 1); 114 115 while (length) { 116 /* after reading the status, 117 * if the I2C operation executed successfully 118 * (i.e. DC_I2C_STATUS_DONE = 1) then the I2C controller 119 * should read data bytes from I2C circular data buffer 120 */ 121 122 uint32_t i2c_data; 123 124 REG_GET(DC_I2C_DATA, DC_I2C_DATA, &i2c_data); 125 *buffer++ = i2c_data; 126 127 --length; 128 } 129 } 130 131 static bool is_engine_available(struct dce_i2c_hw *dce_i2c_hw) 132 { 133 unsigned int arbitrate; 134 unsigned int i2c_hw_status; 135 136 REG_GET(HW_STATUS, DC_I2C_DDC1_HW_STATUS, &i2c_hw_status); 137 if (i2c_hw_status == DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_HW) 138 return false; 139 140 REG_GET(DC_I2C_ARBITRATION, DC_I2C_REG_RW_CNTL_STATUS, &arbitrate); 141 if (arbitrate == DC_I2C_REG_RW_CNTL_STATUS_DMCU_ONLY) 142 return false; 143 144 return true; 145 } 146 147 static bool is_hw_busy(struct dce_i2c_hw *dce_i2c_hw) 148 { 149 uint32_t i2c_sw_status = 0; 150 151 REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status); 152 if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_IDLE) 153 return false; 154 155 if (is_engine_available(dce_i2c_hw)) 156 return false; 157 158 return true; 159 } 160 161 static bool process_transaction( 162 struct dce_i2c_hw *dce_i2c_hw, 163 struct i2c_request_transaction_data *request) 164 { 165 uint32_t length = request->length; 166 uint8_t *buffer = request->data; 167 168 bool last_transaction = false; 169 uint32_t value = 0; 170 171 if (is_hw_busy(dce_i2c_hw)) { 172 request->status = I2C_CHANNEL_OPERATION_ENGINE_BUSY; 173 return false; 174 } 175 176 last_transaction = ((dce_i2c_hw->transaction_count == 3) || 177 (request->action == DCE_I2C_TRANSACTION_ACTION_I2C_WRITE) || 178 (request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ)); 179 180 181 switch (dce_i2c_hw->transaction_count) { 182 case 0: 183 REG_UPDATE_5(DC_I2C_TRANSACTION0, 184 DC_I2C_STOP_ON_NACK0, 1, 185 DC_I2C_START0, 1, 186 DC_I2C_RW0, 0 != (request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ), 187 DC_I2C_COUNT0, length, 188 DC_I2C_STOP0, last_transaction ? 1 : 0); 189 break; 190 case 1: 191 REG_UPDATE_5(DC_I2C_TRANSACTION1, 192 DC_I2C_STOP_ON_NACK0, 1, 193 DC_I2C_START0, 1, 194 DC_I2C_RW0, 0 != (request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ), 195 DC_I2C_COUNT0, length, 196 DC_I2C_STOP0, last_transaction ? 1 : 0); 197 break; 198 case 2: 199 REG_UPDATE_5(DC_I2C_TRANSACTION2, 200 DC_I2C_STOP_ON_NACK0, 1, 201 DC_I2C_START0, 1, 202 DC_I2C_RW0, 0 != (request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ), 203 DC_I2C_COUNT0, length, 204 DC_I2C_STOP0, last_transaction ? 1 : 0); 205 break; 206 case 3: 207 REG_UPDATE_5(DC_I2C_TRANSACTION3, 208 DC_I2C_STOP_ON_NACK0, 1, 209 DC_I2C_START0, 1, 210 DC_I2C_RW0, 0 != (request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ), 211 DC_I2C_COUNT0, length, 212 DC_I2C_STOP0, last_transaction ? 1 : 0); 213 break; 214 default: 215 /* TODO Warning ? */ 216 break; 217 } 218 219 /* Write the I2C address and I2C data 220 * into the hardware circular buffer, one byte per entry. 221 * As an example, the 7-bit I2C slave address for CRT monitor 222 * for reading DDC/EDID information is 0b1010001. 223 * For an I2C send operation, the LSB must be programmed to 0; 224 * for I2C receive operation, the LSB must be programmed to 1. 225 */ 226 if (dce_i2c_hw->transaction_count == 0) { 227 value = REG_SET_4(DC_I2C_DATA, 0, 228 DC_I2C_DATA_RW, false, 229 DC_I2C_DATA, request->address, 230 DC_I2C_INDEX, 0, 231 DC_I2C_INDEX_WRITE, 1); 232 dce_i2c_hw->buffer_used_write = 0; 233 } else 234 value = REG_SET_2(DC_I2C_DATA, 0, 235 DC_I2C_DATA_RW, false, 236 DC_I2C_DATA, request->address); 237 238 dce_i2c_hw->buffer_used_write++; 239 240 if (!(request->action & DCE_I2C_TRANSACTION_ACTION_I2C_READ)) { 241 while (length) { 242 REG_SET_2(DC_I2C_DATA, value, 243 DC_I2C_INDEX_WRITE, 0, 244 DC_I2C_DATA, *buffer++); 245 dce_i2c_hw->buffer_used_write++; 246 --length; 247 } 248 } 249 250 ++dce_i2c_hw->transaction_count; 251 dce_i2c_hw->buffer_used_bytes += length + 1; 252 253 return last_transaction; 254 } 255 256 static inline void reset_hw_engine(struct dce_i2c_hw *dce_i2c_hw) 257 { 258 REG_UPDATE_2(DC_I2C_CONTROL, 259 DC_I2C_SW_STATUS_RESET, 1, 260 DC_I2C_SW_STATUS_RESET, 1); 261 } 262 263 static void set_speed( 264 struct dce_i2c_hw *dce_i2c_hw, 265 uint32_t speed) 266 { 267 uint32_t xtal_ref_div = 0; 268 uint32_t prescale = 0; 269 270 if (speed == 0) 271 return; 272 273 REG_GET(MICROSECOND_TIME_BASE_DIV, XTAL_REF_DIV, &xtal_ref_div); 274 275 if (xtal_ref_div == 0) 276 xtal_ref_div = 2; 277 278 prescale = ((dce_i2c_hw->reference_frequency * 2) / xtal_ref_div) / speed; 279 280 if (dce_i2c_hw->masks->DC_I2C_DDC1_START_STOP_TIMING_CNTL) 281 REG_UPDATE_N(SPEED, 3, 282 FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), prescale, 283 FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2, 284 FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_START_STOP_TIMING_CNTL), speed > 50 ? 2:1); 285 else 286 REG_UPDATE_N(SPEED, 2, 287 FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_PRESCALE), prescale, 288 FN(DC_I2C_DDC1_SPEED, DC_I2C_DDC1_THRESHOLD), 2); 289 } 290 291 static bool setup_engine( 292 struct dce_i2c_hw *dce_i2c_hw) 293 { 294 uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE; 295 uint32_t reset_length = 0; 296 /* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/ 297 REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1); 298 299 /* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/ 300 REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1); 301 302 if (dce_i2c_hw->setup_limit != 0) 303 i2c_setup_limit = dce_i2c_hw->setup_limit; 304 /* Program pin select */ 305 REG_UPDATE_6(DC_I2C_CONTROL, 306 DC_I2C_GO, 0, 307 DC_I2C_SOFT_RESET, 0, 308 DC_I2C_SEND_RESET, 0, 309 DC_I2C_SW_STATUS_RESET, 1, 310 DC_I2C_TRANSACTION_COUNT, 0, 311 DC_I2C_DDC_SELECT, dce_i2c_hw->engine_id); 312 313 /* Program time limit */ 314 if (dce_i2c_hw->send_reset_length == 0) { 315 /*pre-dcn*/ 316 REG_UPDATE_N(SETUP, 2, 317 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit, 318 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1); 319 } else { 320 reset_length = dce_i2c_hw->send_reset_length; 321 REG_UPDATE_N(SETUP, 3, 322 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit, 323 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_SEND_RESET_LENGTH), reset_length, 324 FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1); 325 } 326 /* Program HW priority 327 * set to High - interrupt software I2C at any time 328 * Enable restart of SW I2C that was interrupted by HW 329 * disable queuing of software while I2C is in use by HW 330 */ 331 REG_UPDATE(DC_I2C_ARBITRATION, 332 DC_I2C_NO_QUEUED_SW_GO, 0); 333 334 return true; 335 } 336 337 static void release_engine( 338 struct dce_i2c_hw *dce_i2c_hw) 339 { 340 bool safe_to_reset; 341 342 /* Restore original HW engine speed */ 343 set_speed(dce_i2c_hw, dce_i2c_hw->default_speed); 344 345 /* Reset HW engine */ 346 { 347 uint32_t i2c_sw_status = 0; 348 349 REG_GET(DC_I2C_SW_STATUS, DC_I2C_SW_STATUS, &i2c_sw_status); 350 /* if used by SW, safe to reset */ 351 safe_to_reset = (i2c_sw_status == 1); 352 } 353 354 if (safe_to_reset) 355 REG_UPDATE_2(DC_I2C_CONTROL, 356 DC_I2C_SOFT_RESET, 1, 357 DC_I2C_SW_STATUS_RESET, 1); 358 else 359 REG_UPDATE(DC_I2C_CONTROL, DC_I2C_SW_STATUS_RESET, 1); 360 /* HW I2c engine - clock gating feature */ 361 if (!dce_i2c_hw->engine_keep_power_up_count) 362 REG_UPDATE_N(SETUP, 1, FN(SETUP, DC_I2C_DDC1_ENABLE), 0); 363 /* Release I2C after reset, so HW or DMCU could use it */ 364 REG_UPDATE_2(DC_I2C_ARBITRATION, DC_I2C_SW_DONE_USING_I2C_REG, 1, 365 DC_I2C_SW_USE_I2C_REG_REQ, 0); 366 367 } 368 369 struct dce_i2c_hw *acquire_i2c_hw_engine( 370 struct resource_pool *pool, 371 struct ddc *ddc) 372 { 373 uint32_t counter = 0; 374 enum gpio_result result; 375 struct dce_i2c_hw *dce_i2c_hw = NULL; 376 377 if (!ddc) 378 return NULL; 379 380 if (ddc->hw_info.hw_supported) { 381 enum gpio_ddc_line line = dal_ddc_get_line(ddc); 382 383 if (line < pool->res_cap->num_ddc) 384 dce_i2c_hw = pool->hw_i2cs[line]; 385 } 386 387 if (!dce_i2c_hw) 388 return NULL; 389 390 if (pool->i2c_hw_buffer_in_use || !is_engine_available(dce_i2c_hw)) 391 return NULL; 392 393 do { 394 result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE, 395 GPIO_DDC_CONFIG_TYPE_MODE_I2C); 396 397 if (result == GPIO_RESULT_OK) 398 break; 399 400 /* i2c_engine is busy by VBios, lets wait and retry */ 401 402 udelay(10); 403 404 ++counter; 405 } while (counter < 2); 406 407 if (result != GPIO_RESULT_OK) 408 return NULL; 409 410 dce_i2c_hw->ddc = ddc; 411 412 if (!setup_engine(dce_i2c_hw)) { 413 release_engine(dce_i2c_hw); 414 return NULL; 415 } 416 417 pool->i2c_hw_buffer_in_use = true; 418 return dce_i2c_hw; 419 } 420 421 enum i2c_channel_operation_result dce_i2c_hw_engine_wait_on_operation_result( 422 struct dce_i2c_hw *dce_i2c_hw, 423 uint32_t timeout, 424 enum i2c_channel_operation_result expected_result) 425 { 426 enum i2c_channel_operation_result result; 427 uint32_t i = 0; 428 429 if (!timeout) 430 return I2C_CHANNEL_OPERATION_SUCCEEDED; 431 432 do { 433 434 result = get_channel_status( 435 dce_i2c_hw, NULL); 436 437 if (result != expected_result) 438 break; 439 440 udelay(1); 441 442 ++i; 443 } while (i < timeout); 444 return result; 445 } 446 447 static void submit_channel_request_hw( 448 struct dce_i2c_hw *dce_i2c_hw, 449 struct i2c_request_transaction_data *request) 450 { 451 request->status = I2C_CHANNEL_OPERATION_SUCCEEDED; 452 453 if (!process_transaction(dce_i2c_hw, request)) 454 return; 455 456 if (is_hw_busy(dce_i2c_hw)) { 457 request->status = I2C_CHANNEL_OPERATION_ENGINE_BUSY; 458 return; 459 } 460 reset_hw_engine(dce_i2c_hw); 461 462 execute_transaction(dce_i2c_hw); 463 464 465 } 466 467 static uint32_t get_transaction_timeout_hw( 468 const struct dce_i2c_hw *dce_i2c_hw, 469 uint32_t length, 470 uint32_t speed) 471 { 472 uint32_t period_timeout; 473 uint32_t num_of_clock_stretches; 474 475 if (!speed) 476 return 0; 477 478 period_timeout = (1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed; 479 480 num_of_clock_stretches = 1 + (length << 3) + 1; 481 num_of_clock_stretches += 482 (dce_i2c_hw->buffer_used_bytes << 3) + 483 (dce_i2c_hw->transaction_count << 1); 484 485 return period_timeout * num_of_clock_stretches; 486 } 487 488 bool dce_i2c_hw_engine_submit_payload( 489 struct dce_i2c_hw *dce_i2c_hw, 490 struct i2c_payload *payload, 491 bool middle_of_transaction, 492 uint32_t speed) 493 { 494 495 struct i2c_request_transaction_data request; 496 497 uint32_t transaction_timeout; 498 499 enum i2c_channel_operation_result operation_result; 500 501 bool result = false; 502 503 /* We need following: 504 * transaction length will not exceed 505 * the number of free bytes in HW buffer (minus one for address) 506 */ 507 508 if (payload->length >= 509 get_hw_buffer_available_size(dce_i2c_hw)) { 510 return false; 511 } 512 513 if (!payload->write) 514 request.action = middle_of_transaction ? 515 DCE_I2C_TRANSACTION_ACTION_I2C_READ_MOT : 516 DCE_I2C_TRANSACTION_ACTION_I2C_READ; 517 else 518 request.action = middle_of_transaction ? 519 DCE_I2C_TRANSACTION_ACTION_I2C_WRITE_MOT : 520 DCE_I2C_TRANSACTION_ACTION_I2C_WRITE; 521 522 523 request.address = (uint8_t) ((payload->address << 1) | !payload->write); 524 request.length = payload->length; 525 request.data = payload->data; 526 527 /* obtain timeout value before submitting request */ 528 529 transaction_timeout = get_transaction_timeout_hw( 530 dce_i2c_hw, payload->length + 1, speed); 531 532 submit_channel_request_hw( 533 dce_i2c_hw, &request); 534 535 if ((request.status == I2C_CHANNEL_OPERATION_FAILED) || 536 (request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY)) 537 return false; 538 539 /* wait until transaction proceed */ 540 541 operation_result = dce_i2c_hw_engine_wait_on_operation_result( 542 dce_i2c_hw, 543 transaction_timeout, 544 I2C_CHANNEL_OPERATION_ENGINE_BUSY); 545 546 /* update transaction status */ 547 548 if (operation_result == I2C_CHANNEL_OPERATION_SUCCEEDED) 549 result = true; 550 551 if (result && (!payload->write)) 552 process_channel_reply(dce_i2c_hw, payload); 553 554 return result; 555 } 556 557 bool dce_i2c_submit_command_hw( 558 struct resource_pool *pool, 559 struct ddc *ddc, 560 struct i2c_command *cmd, 561 struct dce_i2c_hw *dce_i2c_hw) 562 { 563 uint8_t index_of_payload = 0; 564 bool result; 565 566 set_speed(dce_i2c_hw, cmd->speed); 567 568 result = true; 569 570 while (index_of_payload < cmd->number_of_payloads) { 571 bool mot = (index_of_payload != cmd->number_of_payloads - 1); 572 573 struct i2c_payload *payload = cmd->payloads + index_of_payload; 574 575 if (!dce_i2c_hw_engine_submit_payload( 576 dce_i2c_hw, payload, mot, cmd->speed)) { 577 result = false; 578 break; 579 } 580 581 ++index_of_payload; 582 } 583 584 pool->i2c_hw_buffer_in_use = false; 585 586 release_engine(dce_i2c_hw); 587 dal_ddc_close(dce_i2c_hw->ddc); 588 589 dce_i2c_hw->ddc = NULL; 590 591 return result; 592 } 593 594 void dce_i2c_hw_construct( 595 struct dce_i2c_hw *dce_i2c_hw, 596 struct dc_context *ctx, 597 uint32_t engine_id, 598 const struct dce_i2c_registers *regs, 599 const struct dce_i2c_shift *shifts, 600 const struct dce_i2c_mask *masks) 601 { 602 dce_i2c_hw->ctx = ctx; 603 dce_i2c_hw->engine_id = engine_id; 604 dce_i2c_hw->reference_frequency = (ctx->dc_bios->fw_info.pll_info.crystal_frequency) >> 1; 605 dce_i2c_hw->regs = regs; 606 dce_i2c_hw->shifts = shifts; 607 dce_i2c_hw->masks = masks; 608 dce_i2c_hw->buffer_used_bytes = 0; 609 dce_i2c_hw->transaction_count = 0; 610 dce_i2c_hw->engine_keep_power_up_count = 1; 611 dce_i2c_hw->default_speed = DEFAULT_I2C_HW_SPEED; 612 dce_i2c_hw->send_reset_length = 0; 613 dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCE; 614 dce_i2c_hw->buffer_size = I2C_HW_BUFFER_SIZE_DCE; 615 } 616 617 void dce100_i2c_hw_construct( 618 struct dce_i2c_hw *dce_i2c_hw, 619 struct dc_context *ctx, 620 uint32_t engine_id, 621 const struct dce_i2c_registers *regs, 622 const struct dce_i2c_shift *shifts, 623 const struct dce_i2c_mask *masks) 624 { 625 dce_i2c_hw_construct(dce_i2c_hw, 626 ctx, 627 engine_id, 628 regs, 629 shifts, 630 masks); 631 dce_i2c_hw->buffer_size = I2C_HW_BUFFER_SIZE_DCE100; 632 } 633 634 void dce112_i2c_hw_construct( 635 struct dce_i2c_hw *dce_i2c_hw, 636 struct dc_context *ctx, 637 uint32_t engine_id, 638 const struct dce_i2c_registers *regs, 639 const struct dce_i2c_shift *shifts, 640 const struct dce_i2c_mask *masks) 641 { 642 dce100_i2c_hw_construct(dce_i2c_hw, 643 ctx, 644 engine_id, 645 regs, 646 shifts, 647 masks); 648 dce_i2c_hw->default_speed = DEFAULT_I2C_HW_SPEED_100KHZ; 649 } 650 651 void dcn1_i2c_hw_construct( 652 struct dce_i2c_hw *dce_i2c_hw, 653 struct dc_context *ctx, 654 uint32_t engine_id, 655 const struct dce_i2c_registers *regs, 656 const struct dce_i2c_shift *shifts, 657 const struct dce_i2c_mask *masks) 658 { 659 dce112_i2c_hw_construct(dce_i2c_hw, 660 ctx, 661 engine_id, 662 regs, 663 shifts, 664 masks); 665 dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCN; 666 } 667 668 void dcn2_i2c_hw_construct( 669 struct dce_i2c_hw *dce_i2c_hw, 670 struct dc_context *ctx, 671 uint32_t engine_id, 672 const struct dce_i2c_registers *regs, 673 const struct dce_i2c_shift *shifts, 674 const struct dce_i2c_mask *masks) 675 { 676 dcn1_i2c_hw_construct(dce_i2c_hw, 677 ctx, 678 engine_id, 679 regs, 680 shifts, 681 masks); 682 dce_i2c_hw->send_reset_length = I2C_SEND_RESET_LENGTH_9; 683 if (ctx->dc->debug.scl_reset_length10) 684 dce_i2c_hw->send_reset_length = I2C_SEND_RESET_LENGTH_10; 685 } 686