1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008-2014, The Linux foundation. All rights reserved. 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/delay.h> 8 #include <linux/err.h> 9 #include <linux/interrupt.h> 10 #include <linux/io.h> 11 #include <linux/list.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/of_device.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/spi/spi.h> 18 #include <linux/dmaengine.h> 19 #include <linux/dma-mapping.h> 20 21 #define QUP_CONFIG 0x0000 22 #define QUP_STATE 0x0004 23 #define QUP_IO_M_MODES 0x0008 24 #define QUP_SW_RESET 0x000c 25 #define QUP_OPERATIONAL 0x0018 26 #define QUP_ERROR_FLAGS 0x001c 27 #define QUP_ERROR_FLAGS_EN 0x0020 28 #define QUP_OPERATIONAL_MASK 0x0028 29 #define QUP_HW_VERSION 0x0030 30 #define QUP_MX_OUTPUT_CNT 0x0100 31 #define QUP_OUTPUT_FIFO 0x0110 32 #define QUP_MX_WRITE_CNT 0x0150 33 #define QUP_MX_INPUT_CNT 0x0200 34 #define QUP_MX_READ_CNT 0x0208 35 #define QUP_INPUT_FIFO 0x0218 36 37 #define SPI_CONFIG 0x0300 38 #define SPI_IO_CONTROL 0x0304 39 #define SPI_ERROR_FLAGS 0x0308 40 #define SPI_ERROR_FLAGS_EN 0x030c 41 42 /* QUP_CONFIG fields */ 43 #define QUP_CONFIG_SPI_MODE (1 << 8) 44 #define QUP_CONFIG_CLOCK_AUTO_GATE BIT(13) 45 #define QUP_CONFIG_NO_INPUT BIT(7) 46 #define QUP_CONFIG_NO_OUTPUT BIT(6) 47 #define QUP_CONFIG_N 0x001f 48 49 /* QUP_STATE fields */ 50 #define QUP_STATE_VALID BIT(2) 51 #define QUP_STATE_RESET 0 52 #define QUP_STATE_RUN 1 53 #define QUP_STATE_PAUSE 3 54 #define QUP_STATE_MASK 3 55 #define QUP_STATE_CLEAR 2 56 57 #define QUP_HW_VERSION_2_1_1 0x20010001 58 59 /* QUP_IO_M_MODES fields */ 60 #define QUP_IO_M_PACK_EN BIT(15) 61 #define QUP_IO_M_UNPACK_EN BIT(14) 62 #define QUP_IO_M_INPUT_MODE_MASK_SHIFT 12 63 #define QUP_IO_M_OUTPUT_MODE_MASK_SHIFT 10 64 #define QUP_IO_M_INPUT_MODE_MASK (3 << QUP_IO_M_INPUT_MODE_MASK_SHIFT) 65 #define QUP_IO_M_OUTPUT_MODE_MASK (3 << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT) 66 67 #define QUP_IO_M_OUTPUT_BLOCK_SIZE(x) (((x) & (0x03 << 0)) >> 0) 68 #define QUP_IO_M_OUTPUT_FIFO_SIZE(x) (((x) & (0x07 << 2)) >> 2) 69 #define QUP_IO_M_INPUT_BLOCK_SIZE(x) (((x) & (0x03 << 5)) >> 5) 70 #define QUP_IO_M_INPUT_FIFO_SIZE(x) (((x) & (0x07 << 7)) >> 7) 71 72 #define QUP_IO_M_MODE_FIFO 0 73 #define QUP_IO_M_MODE_BLOCK 1 74 #define QUP_IO_M_MODE_DMOV 2 75 #define QUP_IO_M_MODE_BAM 3 76 77 /* QUP_OPERATIONAL fields */ 78 #define QUP_OP_IN_BLOCK_READ_REQ BIT(13) 79 #define QUP_OP_OUT_BLOCK_WRITE_REQ BIT(12) 80 #define QUP_OP_MAX_INPUT_DONE_FLAG BIT(11) 81 #define QUP_OP_MAX_OUTPUT_DONE_FLAG BIT(10) 82 #define QUP_OP_IN_SERVICE_FLAG BIT(9) 83 #define QUP_OP_OUT_SERVICE_FLAG BIT(8) 84 #define QUP_OP_IN_FIFO_FULL BIT(7) 85 #define QUP_OP_OUT_FIFO_FULL BIT(6) 86 #define QUP_OP_IN_FIFO_NOT_EMPTY BIT(5) 87 #define QUP_OP_OUT_FIFO_NOT_EMPTY BIT(4) 88 89 /* QUP_ERROR_FLAGS and QUP_ERROR_FLAGS_EN fields */ 90 #define QUP_ERROR_OUTPUT_OVER_RUN BIT(5) 91 #define QUP_ERROR_INPUT_UNDER_RUN BIT(4) 92 #define QUP_ERROR_OUTPUT_UNDER_RUN BIT(3) 93 #define QUP_ERROR_INPUT_OVER_RUN BIT(2) 94 95 /* SPI_CONFIG fields */ 96 #define SPI_CONFIG_HS_MODE BIT(10) 97 #define SPI_CONFIG_INPUT_FIRST BIT(9) 98 #define SPI_CONFIG_LOOPBACK BIT(8) 99 100 /* SPI_IO_CONTROL fields */ 101 #define SPI_IO_C_FORCE_CS BIT(11) 102 #define SPI_IO_C_CLK_IDLE_HIGH BIT(10) 103 #define SPI_IO_C_MX_CS_MODE BIT(8) 104 #define SPI_IO_C_CS_N_POLARITY_0 BIT(4) 105 #define SPI_IO_C_CS_SELECT(x) (((x) & 3) << 2) 106 #define SPI_IO_C_CS_SELECT_MASK 0x000c 107 #define SPI_IO_C_TRISTATE_CS BIT(1) 108 #define SPI_IO_C_NO_TRI_STATE BIT(0) 109 110 /* SPI_ERROR_FLAGS and SPI_ERROR_FLAGS_EN fields */ 111 #define SPI_ERROR_CLK_OVER_RUN BIT(1) 112 #define SPI_ERROR_CLK_UNDER_RUN BIT(0) 113 114 #define SPI_NUM_CHIPSELECTS 4 115 116 #define SPI_MAX_XFER (SZ_64K - 64) 117 118 /* high speed mode is when bus rate is greater then 26MHz */ 119 #define SPI_HS_MIN_RATE 26000000 120 #define SPI_MAX_RATE 50000000 121 122 #define SPI_DELAY_THRESHOLD 1 123 #define SPI_DELAY_RETRY 10 124 125 struct spi_qup { 126 void __iomem *base; 127 struct device *dev; 128 struct clk *cclk; /* core clock */ 129 struct clk *iclk; /* interface clock */ 130 int irq; 131 spinlock_t lock; 132 133 int in_fifo_sz; 134 int out_fifo_sz; 135 int in_blk_sz; 136 int out_blk_sz; 137 138 struct spi_transfer *xfer; 139 struct completion done; 140 int error; 141 int w_size; /* bytes per SPI word */ 142 int n_words; 143 int tx_bytes; 144 int rx_bytes; 145 const u8 *tx_buf; 146 u8 *rx_buf; 147 int qup_v1; 148 149 int mode; 150 struct dma_slave_config rx_conf; 151 struct dma_slave_config tx_conf; 152 }; 153 154 static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer); 155 156 static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag) 157 { 158 u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL); 159 160 return (opflag & flag) != 0; 161 } 162 163 static inline bool spi_qup_is_dma_xfer(int mode) 164 { 165 if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM) 166 return true; 167 168 return false; 169 } 170 171 /* get's the transaction size length */ 172 static inline unsigned int spi_qup_len(struct spi_qup *controller) 173 { 174 return controller->n_words * controller->w_size; 175 } 176 177 static inline bool spi_qup_is_valid_state(struct spi_qup *controller) 178 { 179 u32 opstate = readl_relaxed(controller->base + QUP_STATE); 180 181 return opstate & QUP_STATE_VALID; 182 } 183 184 static int spi_qup_set_state(struct spi_qup *controller, u32 state) 185 { 186 unsigned long loop; 187 u32 cur_state; 188 189 loop = 0; 190 while (!spi_qup_is_valid_state(controller)) { 191 192 usleep_range(SPI_DELAY_THRESHOLD, SPI_DELAY_THRESHOLD * 2); 193 194 if (++loop > SPI_DELAY_RETRY) 195 return -EIO; 196 } 197 198 if (loop) 199 dev_dbg(controller->dev, "invalid state for %ld,us %d\n", 200 loop, state); 201 202 cur_state = readl_relaxed(controller->base + QUP_STATE); 203 /* 204 * Per spec: for PAUSE_STATE to RESET_STATE, two writes 205 * of (b10) are required 206 */ 207 if (((cur_state & QUP_STATE_MASK) == QUP_STATE_PAUSE) && 208 (state == QUP_STATE_RESET)) { 209 writel_relaxed(QUP_STATE_CLEAR, controller->base + QUP_STATE); 210 writel_relaxed(QUP_STATE_CLEAR, controller->base + QUP_STATE); 211 } else { 212 cur_state &= ~QUP_STATE_MASK; 213 cur_state |= state; 214 writel_relaxed(cur_state, controller->base + QUP_STATE); 215 } 216 217 loop = 0; 218 while (!spi_qup_is_valid_state(controller)) { 219 220 usleep_range(SPI_DELAY_THRESHOLD, SPI_DELAY_THRESHOLD * 2); 221 222 if (++loop > SPI_DELAY_RETRY) 223 return -EIO; 224 } 225 226 return 0; 227 } 228 229 static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words) 230 { 231 u8 *rx_buf = controller->rx_buf; 232 int i, shift, num_bytes; 233 u32 word; 234 235 for (; num_words; num_words--) { 236 237 word = readl_relaxed(controller->base + QUP_INPUT_FIFO); 238 239 num_bytes = min_t(int, spi_qup_len(controller) - 240 controller->rx_bytes, 241 controller->w_size); 242 243 if (!rx_buf) { 244 controller->rx_bytes += num_bytes; 245 continue; 246 } 247 248 for (i = 0; i < num_bytes; i++, controller->rx_bytes++) { 249 /* 250 * The data format depends on bytes per SPI word: 251 * 4 bytes: 0x12345678 252 * 2 bytes: 0x00001234 253 * 1 byte : 0x00000012 254 */ 255 shift = BITS_PER_BYTE; 256 shift *= (controller->w_size - i - 1); 257 rx_buf[controller->rx_bytes] = word >> shift; 258 } 259 } 260 } 261 262 static void spi_qup_read(struct spi_qup *controller, u32 *opflags) 263 { 264 u32 remainder, words_per_block, num_words; 265 bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK; 266 267 remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->rx_bytes, 268 controller->w_size); 269 words_per_block = controller->in_blk_sz >> 2; 270 271 do { 272 /* ACK by clearing service flag */ 273 writel_relaxed(QUP_OP_IN_SERVICE_FLAG, 274 controller->base + QUP_OPERATIONAL); 275 276 if (!remainder) 277 goto exit; 278 279 if (is_block_mode) { 280 num_words = (remainder > words_per_block) ? 281 words_per_block : remainder; 282 } else { 283 if (!spi_qup_is_flag_set(controller, 284 QUP_OP_IN_FIFO_NOT_EMPTY)) 285 break; 286 287 num_words = 1; 288 } 289 290 /* read up to the maximum transfer size available */ 291 spi_qup_read_from_fifo(controller, num_words); 292 293 remainder -= num_words; 294 295 /* if block mode, check to see if next block is available */ 296 if (is_block_mode && !spi_qup_is_flag_set(controller, 297 QUP_OP_IN_BLOCK_READ_REQ)) 298 break; 299 300 } while (remainder); 301 302 /* 303 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block 304 * reads, it has to be cleared again at the very end. However, be sure 305 * to refresh opflags value because MAX_INPUT_DONE_FLAG may now be 306 * present and this is used to determine if transaction is complete 307 */ 308 exit: 309 if (!remainder) { 310 *opflags = readl_relaxed(controller->base + QUP_OPERATIONAL); 311 if (is_block_mode && *opflags & QUP_OP_MAX_INPUT_DONE_FLAG) 312 writel_relaxed(QUP_OP_IN_SERVICE_FLAG, 313 controller->base + QUP_OPERATIONAL); 314 } 315 } 316 317 static void spi_qup_write_to_fifo(struct spi_qup *controller, u32 num_words) 318 { 319 const u8 *tx_buf = controller->tx_buf; 320 int i, num_bytes; 321 u32 word, data; 322 323 for (; num_words; num_words--) { 324 word = 0; 325 326 num_bytes = min_t(int, spi_qup_len(controller) - 327 controller->tx_bytes, 328 controller->w_size); 329 if (tx_buf) 330 for (i = 0; i < num_bytes; i++) { 331 data = tx_buf[controller->tx_bytes + i]; 332 word |= data << (BITS_PER_BYTE * (3 - i)); 333 } 334 335 controller->tx_bytes += num_bytes; 336 337 writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO); 338 } 339 } 340 341 static void spi_qup_dma_done(void *data) 342 { 343 struct spi_qup *qup = data; 344 345 complete(&qup->done); 346 } 347 348 static void spi_qup_write(struct spi_qup *controller) 349 { 350 bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK; 351 u32 remainder, words_per_block, num_words; 352 353 remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->tx_bytes, 354 controller->w_size); 355 words_per_block = controller->out_blk_sz >> 2; 356 357 do { 358 /* ACK by clearing service flag */ 359 writel_relaxed(QUP_OP_OUT_SERVICE_FLAG, 360 controller->base + QUP_OPERATIONAL); 361 362 /* make sure the interrupt is valid */ 363 if (!remainder) 364 return; 365 366 if (is_block_mode) { 367 num_words = (remainder > words_per_block) ? 368 words_per_block : remainder; 369 } else { 370 if (spi_qup_is_flag_set(controller, 371 QUP_OP_OUT_FIFO_FULL)) 372 break; 373 374 num_words = 1; 375 } 376 377 spi_qup_write_to_fifo(controller, num_words); 378 379 remainder -= num_words; 380 381 /* if block mode, check to see if next block is available */ 382 if (is_block_mode && !spi_qup_is_flag_set(controller, 383 QUP_OP_OUT_BLOCK_WRITE_REQ)) 384 break; 385 386 } while (remainder); 387 } 388 389 static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl, 390 unsigned int nents, enum dma_transfer_direction dir, 391 dma_async_tx_callback callback) 392 { 393 struct spi_qup *qup = spi_master_get_devdata(master); 394 unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE; 395 struct dma_async_tx_descriptor *desc; 396 struct dma_chan *chan; 397 dma_cookie_t cookie; 398 399 if (dir == DMA_MEM_TO_DEV) 400 chan = master->dma_tx; 401 else 402 chan = master->dma_rx; 403 404 desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags); 405 if (IS_ERR_OR_NULL(desc)) 406 return desc ? PTR_ERR(desc) : -EINVAL; 407 408 desc->callback = callback; 409 desc->callback_param = qup; 410 411 cookie = dmaengine_submit(desc); 412 413 return dma_submit_error(cookie); 414 } 415 416 static void spi_qup_dma_terminate(struct spi_master *master, 417 struct spi_transfer *xfer) 418 { 419 if (xfer->tx_buf) 420 dmaengine_terminate_all(master->dma_tx); 421 if (xfer->rx_buf) 422 dmaengine_terminate_all(master->dma_rx); 423 } 424 425 static u32 spi_qup_sgl_get_nents_len(struct scatterlist *sgl, u32 max, 426 u32 *nents) 427 { 428 struct scatterlist *sg; 429 u32 total = 0; 430 431 for (sg = sgl; sg; sg = sg_next(sg)) { 432 unsigned int len = sg_dma_len(sg); 433 434 /* check for overflow as well as limit */ 435 if (((total + len) < total) || ((total + len) > max)) 436 break; 437 438 total += len; 439 (*nents)++; 440 } 441 442 return total; 443 } 444 445 static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer, 446 unsigned long timeout) 447 { 448 dma_async_tx_callback rx_done = NULL, tx_done = NULL; 449 struct spi_master *master = spi->master; 450 struct spi_qup *qup = spi_master_get_devdata(master); 451 struct scatterlist *tx_sgl, *rx_sgl; 452 int ret; 453 454 if (xfer->rx_buf) 455 rx_done = spi_qup_dma_done; 456 else if (xfer->tx_buf) 457 tx_done = spi_qup_dma_done; 458 459 rx_sgl = xfer->rx_sg.sgl; 460 tx_sgl = xfer->tx_sg.sgl; 461 462 do { 463 u32 rx_nents = 0, tx_nents = 0; 464 465 if (rx_sgl) 466 qup->n_words = spi_qup_sgl_get_nents_len(rx_sgl, 467 SPI_MAX_XFER, &rx_nents) / qup->w_size; 468 if (tx_sgl) 469 qup->n_words = spi_qup_sgl_get_nents_len(tx_sgl, 470 SPI_MAX_XFER, &tx_nents) / qup->w_size; 471 if (!qup->n_words) 472 return -EIO; 473 474 ret = spi_qup_io_config(spi, xfer); 475 if (ret) 476 return ret; 477 478 /* before issuing the descriptors, set the QUP to run */ 479 ret = spi_qup_set_state(qup, QUP_STATE_RUN); 480 if (ret) { 481 dev_warn(qup->dev, "cannot set RUN state\n"); 482 return ret; 483 } 484 if (rx_sgl) { 485 ret = spi_qup_prep_sg(master, rx_sgl, rx_nents, 486 DMA_DEV_TO_MEM, rx_done); 487 if (ret) 488 return ret; 489 dma_async_issue_pending(master->dma_rx); 490 } 491 492 if (tx_sgl) { 493 ret = spi_qup_prep_sg(master, tx_sgl, tx_nents, 494 DMA_MEM_TO_DEV, tx_done); 495 if (ret) 496 return ret; 497 498 dma_async_issue_pending(master->dma_tx); 499 } 500 501 if (!wait_for_completion_timeout(&qup->done, timeout)) 502 return -ETIMEDOUT; 503 504 for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl)) 505 ; 506 for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl)) 507 ; 508 509 } while (rx_sgl || tx_sgl); 510 511 return 0; 512 } 513 514 static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer, 515 unsigned long timeout) 516 { 517 struct spi_master *master = spi->master; 518 struct spi_qup *qup = spi_master_get_devdata(master); 519 int ret, n_words, iterations, offset = 0; 520 521 n_words = qup->n_words; 522 iterations = n_words / SPI_MAX_XFER; /* round down */ 523 qup->rx_buf = xfer->rx_buf; 524 qup->tx_buf = xfer->tx_buf; 525 526 do { 527 if (iterations) 528 qup->n_words = SPI_MAX_XFER; 529 else 530 qup->n_words = n_words % SPI_MAX_XFER; 531 532 if (qup->tx_buf && offset) 533 qup->tx_buf = xfer->tx_buf + offset * SPI_MAX_XFER; 534 535 if (qup->rx_buf && offset) 536 qup->rx_buf = xfer->rx_buf + offset * SPI_MAX_XFER; 537 538 /* 539 * if the transaction is small enough, we need 540 * to fallback to FIFO mode 541 */ 542 if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32))) 543 qup->mode = QUP_IO_M_MODE_FIFO; 544 545 ret = spi_qup_io_config(spi, xfer); 546 if (ret) 547 return ret; 548 549 ret = spi_qup_set_state(qup, QUP_STATE_RUN); 550 if (ret) { 551 dev_warn(qup->dev, "cannot set RUN state\n"); 552 return ret; 553 } 554 555 ret = spi_qup_set_state(qup, QUP_STATE_PAUSE); 556 if (ret) { 557 dev_warn(qup->dev, "cannot set PAUSE state\n"); 558 return ret; 559 } 560 561 if (qup->mode == QUP_IO_M_MODE_FIFO) 562 spi_qup_write(qup); 563 564 ret = spi_qup_set_state(qup, QUP_STATE_RUN); 565 if (ret) { 566 dev_warn(qup->dev, "cannot set RUN state\n"); 567 return ret; 568 } 569 570 if (!wait_for_completion_timeout(&qup->done, timeout)) 571 return -ETIMEDOUT; 572 573 offset++; 574 } while (iterations--); 575 576 return 0; 577 } 578 579 static bool spi_qup_data_pending(struct spi_qup *controller) 580 { 581 unsigned int remainder_tx, remainder_rx; 582 583 remainder_tx = DIV_ROUND_UP(spi_qup_len(controller) - 584 controller->tx_bytes, controller->w_size); 585 586 remainder_rx = DIV_ROUND_UP(spi_qup_len(controller) - 587 controller->rx_bytes, controller->w_size); 588 589 return remainder_tx || remainder_rx; 590 } 591 592 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id) 593 { 594 struct spi_qup *controller = dev_id; 595 u32 opflags, qup_err, spi_err; 596 int error = 0; 597 598 qup_err = readl_relaxed(controller->base + QUP_ERROR_FLAGS); 599 spi_err = readl_relaxed(controller->base + SPI_ERROR_FLAGS); 600 opflags = readl_relaxed(controller->base + QUP_OPERATIONAL); 601 602 writel_relaxed(qup_err, controller->base + QUP_ERROR_FLAGS); 603 writel_relaxed(spi_err, controller->base + SPI_ERROR_FLAGS); 604 605 if (qup_err) { 606 if (qup_err & QUP_ERROR_OUTPUT_OVER_RUN) 607 dev_warn(controller->dev, "OUTPUT_OVER_RUN\n"); 608 if (qup_err & QUP_ERROR_INPUT_UNDER_RUN) 609 dev_warn(controller->dev, "INPUT_UNDER_RUN\n"); 610 if (qup_err & QUP_ERROR_OUTPUT_UNDER_RUN) 611 dev_warn(controller->dev, "OUTPUT_UNDER_RUN\n"); 612 if (qup_err & QUP_ERROR_INPUT_OVER_RUN) 613 dev_warn(controller->dev, "INPUT_OVER_RUN\n"); 614 615 error = -EIO; 616 } 617 618 if (spi_err) { 619 if (spi_err & SPI_ERROR_CLK_OVER_RUN) 620 dev_warn(controller->dev, "CLK_OVER_RUN\n"); 621 if (spi_err & SPI_ERROR_CLK_UNDER_RUN) 622 dev_warn(controller->dev, "CLK_UNDER_RUN\n"); 623 624 error = -EIO; 625 } 626 627 spin_lock(&controller->lock); 628 if (!controller->error) 629 controller->error = error; 630 spin_unlock(&controller->lock); 631 632 if (spi_qup_is_dma_xfer(controller->mode)) { 633 writel_relaxed(opflags, controller->base + QUP_OPERATIONAL); 634 } else { 635 if (opflags & QUP_OP_IN_SERVICE_FLAG) 636 spi_qup_read(controller, &opflags); 637 638 if (opflags & QUP_OP_OUT_SERVICE_FLAG) 639 spi_qup_write(controller); 640 641 if (!spi_qup_data_pending(controller)) 642 complete(&controller->done); 643 } 644 645 if (error) 646 complete(&controller->done); 647 648 if (opflags & QUP_OP_MAX_INPUT_DONE_FLAG) { 649 if (!spi_qup_is_dma_xfer(controller->mode)) { 650 if (spi_qup_data_pending(controller)) 651 return IRQ_HANDLED; 652 } 653 complete(&controller->done); 654 } 655 656 return IRQ_HANDLED; 657 } 658 659 /* set clock freq ... bits per word, determine mode */ 660 static int spi_qup_io_prep(struct spi_device *spi, struct spi_transfer *xfer) 661 { 662 struct spi_qup *controller = spi_master_get_devdata(spi->master); 663 int ret; 664 665 if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) { 666 dev_err(controller->dev, "too big size for loopback %d > %d\n", 667 xfer->len, controller->in_fifo_sz); 668 return -EIO; 669 } 670 671 ret = clk_set_rate(controller->cclk, xfer->speed_hz); 672 if (ret) { 673 dev_err(controller->dev, "fail to set frequency %d", 674 xfer->speed_hz); 675 return -EIO; 676 } 677 678 controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8); 679 controller->n_words = xfer->len / controller->w_size; 680 681 if (controller->n_words <= (controller->in_fifo_sz / sizeof(u32))) 682 controller->mode = QUP_IO_M_MODE_FIFO; 683 else if (spi->master->can_dma && 684 spi->master->can_dma(spi->master, spi, xfer) && 685 spi->master->cur_msg_mapped) 686 controller->mode = QUP_IO_M_MODE_BAM; 687 else 688 controller->mode = QUP_IO_M_MODE_BLOCK; 689 690 return 0; 691 } 692 693 /* prep qup for another spi transaction of specific type */ 694 static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) 695 { 696 struct spi_qup *controller = spi_master_get_devdata(spi->master); 697 u32 config, iomode, control; 698 unsigned long flags; 699 700 spin_lock_irqsave(&controller->lock, flags); 701 controller->xfer = xfer; 702 controller->error = 0; 703 controller->rx_bytes = 0; 704 controller->tx_bytes = 0; 705 spin_unlock_irqrestore(&controller->lock, flags); 706 707 708 if (spi_qup_set_state(controller, QUP_STATE_RESET)) { 709 dev_err(controller->dev, "cannot set RESET state\n"); 710 return -EIO; 711 } 712 713 switch (controller->mode) { 714 case QUP_IO_M_MODE_FIFO: 715 writel_relaxed(controller->n_words, 716 controller->base + QUP_MX_READ_CNT); 717 writel_relaxed(controller->n_words, 718 controller->base + QUP_MX_WRITE_CNT); 719 /* must be zero for FIFO */ 720 writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT); 721 writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT); 722 break; 723 case QUP_IO_M_MODE_BAM: 724 writel_relaxed(controller->n_words, 725 controller->base + QUP_MX_INPUT_CNT); 726 writel_relaxed(controller->n_words, 727 controller->base + QUP_MX_OUTPUT_CNT); 728 /* must be zero for BLOCK and BAM */ 729 writel_relaxed(0, controller->base + QUP_MX_READ_CNT); 730 writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT); 731 732 if (!controller->qup_v1) { 733 void __iomem *input_cnt; 734 735 input_cnt = controller->base + QUP_MX_INPUT_CNT; 736 /* 737 * for DMA transfers, both QUP_MX_INPUT_CNT and 738 * QUP_MX_OUTPUT_CNT must be zero to all cases but one. 739 * That case is a non-balanced transfer when there is 740 * only a rx_buf. 741 */ 742 if (xfer->tx_buf) 743 writel_relaxed(0, input_cnt); 744 else 745 writel_relaxed(controller->n_words, input_cnt); 746 747 writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT); 748 } 749 break; 750 case QUP_IO_M_MODE_BLOCK: 751 reinit_completion(&controller->done); 752 writel_relaxed(controller->n_words, 753 controller->base + QUP_MX_INPUT_CNT); 754 writel_relaxed(controller->n_words, 755 controller->base + QUP_MX_OUTPUT_CNT); 756 /* must be zero for BLOCK and BAM */ 757 writel_relaxed(0, controller->base + QUP_MX_READ_CNT); 758 writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT); 759 break; 760 default: 761 dev_err(controller->dev, "unknown mode = %d\n", 762 controller->mode); 763 return -EIO; 764 } 765 766 iomode = readl_relaxed(controller->base + QUP_IO_M_MODES); 767 /* Set input and output transfer mode */ 768 iomode &= ~(QUP_IO_M_INPUT_MODE_MASK | QUP_IO_M_OUTPUT_MODE_MASK); 769 770 if (!spi_qup_is_dma_xfer(controller->mode)) 771 iomode &= ~(QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN); 772 else 773 iomode |= QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN; 774 775 iomode |= (controller->mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT); 776 iomode |= (controller->mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT); 777 778 writel_relaxed(iomode, controller->base + QUP_IO_M_MODES); 779 780 control = readl_relaxed(controller->base + SPI_IO_CONTROL); 781 782 if (spi->mode & SPI_CPOL) 783 control |= SPI_IO_C_CLK_IDLE_HIGH; 784 else 785 control &= ~SPI_IO_C_CLK_IDLE_HIGH; 786 787 writel_relaxed(control, controller->base + SPI_IO_CONTROL); 788 789 config = readl_relaxed(controller->base + SPI_CONFIG); 790 791 if (spi->mode & SPI_LOOP) 792 config |= SPI_CONFIG_LOOPBACK; 793 else 794 config &= ~SPI_CONFIG_LOOPBACK; 795 796 if (spi->mode & SPI_CPHA) 797 config &= ~SPI_CONFIG_INPUT_FIRST; 798 else 799 config |= SPI_CONFIG_INPUT_FIRST; 800 801 /* 802 * HS_MODE improves signal stability for spi-clk high rates, 803 * but is invalid in loop back mode. 804 */ 805 if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(spi->mode & SPI_LOOP)) 806 config |= SPI_CONFIG_HS_MODE; 807 else 808 config &= ~SPI_CONFIG_HS_MODE; 809 810 writel_relaxed(config, controller->base + SPI_CONFIG); 811 812 config = readl_relaxed(controller->base + QUP_CONFIG); 813 config &= ~(QUP_CONFIG_NO_INPUT | QUP_CONFIG_NO_OUTPUT | QUP_CONFIG_N); 814 config |= xfer->bits_per_word - 1; 815 config |= QUP_CONFIG_SPI_MODE; 816 817 if (spi_qup_is_dma_xfer(controller->mode)) { 818 if (!xfer->tx_buf) 819 config |= QUP_CONFIG_NO_OUTPUT; 820 if (!xfer->rx_buf) 821 config |= QUP_CONFIG_NO_INPUT; 822 } 823 824 writel_relaxed(config, controller->base + QUP_CONFIG); 825 826 /* only write to OPERATIONAL_MASK when register is present */ 827 if (!controller->qup_v1) { 828 u32 mask = 0; 829 830 /* 831 * mask INPUT and OUTPUT service flags to prevent IRQs on FIFO 832 * status change in BAM mode 833 */ 834 835 if (spi_qup_is_dma_xfer(controller->mode)) 836 mask = QUP_OP_IN_SERVICE_FLAG | QUP_OP_OUT_SERVICE_FLAG; 837 838 writel_relaxed(mask, controller->base + QUP_OPERATIONAL_MASK); 839 } 840 841 return 0; 842 } 843 844 static int spi_qup_transfer_one(struct spi_master *master, 845 struct spi_device *spi, 846 struct spi_transfer *xfer) 847 { 848 struct spi_qup *controller = spi_master_get_devdata(master); 849 unsigned long timeout, flags; 850 int ret; 851 852 ret = spi_qup_io_prep(spi, xfer); 853 if (ret) 854 return ret; 855 856 timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC); 857 timeout = DIV_ROUND_UP(min_t(unsigned long, SPI_MAX_XFER, 858 xfer->len) * 8, timeout); 859 timeout = 100 * msecs_to_jiffies(timeout); 860 861 reinit_completion(&controller->done); 862 863 spin_lock_irqsave(&controller->lock, flags); 864 controller->xfer = xfer; 865 controller->error = 0; 866 controller->rx_bytes = 0; 867 controller->tx_bytes = 0; 868 spin_unlock_irqrestore(&controller->lock, flags); 869 870 if (spi_qup_is_dma_xfer(controller->mode)) 871 ret = spi_qup_do_dma(spi, xfer, timeout); 872 else 873 ret = spi_qup_do_pio(spi, xfer, timeout); 874 875 spi_qup_set_state(controller, QUP_STATE_RESET); 876 spin_lock_irqsave(&controller->lock, flags); 877 if (!ret) 878 ret = controller->error; 879 spin_unlock_irqrestore(&controller->lock, flags); 880 881 if (ret && spi_qup_is_dma_xfer(controller->mode)) 882 spi_qup_dma_terminate(master, xfer); 883 884 return ret; 885 } 886 887 static bool spi_qup_can_dma(struct spi_master *master, struct spi_device *spi, 888 struct spi_transfer *xfer) 889 { 890 struct spi_qup *qup = spi_master_get_devdata(master); 891 size_t dma_align = dma_get_cache_alignment(); 892 int n_words; 893 894 if (xfer->rx_buf) { 895 if (!IS_ALIGNED((size_t)xfer->rx_buf, dma_align) || 896 IS_ERR_OR_NULL(master->dma_rx)) 897 return false; 898 if (qup->qup_v1 && (xfer->len % qup->in_blk_sz)) 899 return false; 900 } 901 902 if (xfer->tx_buf) { 903 if (!IS_ALIGNED((size_t)xfer->tx_buf, dma_align) || 904 IS_ERR_OR_NULL(master->dma_tx)) 905 return false; 906 if (qup->qup_v1 && (xfer->len % qup->out_blk_sz)) 907 return false; 908 } 909 910 n_words = xfer->len / DIV_ROUND_UP(xfer->bits_per_word, 8); 911 if (n_words <= (qup->in_fifo_sz / sizeof(u32))) 912 return false; 913 914 return true; 915 } 916 917 static void spi_qup_release_dma(struct spi_master *master) 918 { 919 if (!IS_ERR_OR_NULL(master->dma_rx)) 920 dma_release_channel(master->dma_rx); 921 if (!IS_ERR_OR_NULL(master->dma_tx)) 922 dma_release_channel(master->dma_tx); 923 } 924 925 static int spi_qup_init_dma(struct spi_master *master, resource_size_t base) 926 { 927 struct spi_qup *spi = spi_master_get_devdata(master); 928 struct dma_slave_config *rx_conf = &spi->rx_conf, 929 *tx_conf = &spi->tx_conf; 930 struct device *dev = spi->dev; 931 int ret; 932 933 /* allocate dma resources, if available */ 934 master->dma_rx = dma_request_chan(dev, "rx"); 935 if (IS_ERR(master->dma_rx)) 936 return PTR_ERR(master->dma_rx); 937 938 master->dma_tx = dma_request_chan(dev, "tx"); 939 if (IS_ERR(master->dma_tx)) { 940 ret = PTR_ERR(master->dma_tx); 941 goto err_tx; 942 } 943 944 /* set DMA parameters */ 945 rx_conf->direction = DMA_DEV_TO_MEM; 946 rx_conf->device_fc = 1; 947 rx_conf->src_addr = base + QUP_INPUT_FIFO; 948 rx_conf->src_maxburst = spi->in_blk_sz; 949 950 tx_conf->direction = DMA_MEM_TO_DEV; 951 tx_conf->device_fc = 1; 952 tx_conf->dst_addr = base + QUP_OUTPUT_FIFO; 953 tx_conf->dst_maxburst = spi->out_blk_sz; 954 955 ret = dmaengine_slave_config(master->dma_rx, rx_conf); 956 if (ret) { 957 dev_err(dev, "failed to configure RX channel\n"); 958 goto err; 959 } 960 961 ret = dmaengine_slave_config(master->dma_tx, tx_conf); 962 if (ret) { 963 dev_err(dev, "failed to configure TX channel\n"); 964 goto err; 965 } 966 967 return 0; 968 969 err: 970 dma_release_channel(master->dma_tx); 971 err_tx: 972 dma_release_channel(master->dma_rx); 973 return ret; 974 } 975 976 static void spi_qup_set_cs(struct spi_device *spi, bool val) 977 { 978 struct spi_qup *controller; 979 u32 spi_ioc; 980 u32 spi_ioc_orig; 981 982 controller = spi_master_get_devdata(spi->master); 983 spi_ioc = readl_relaxed(controller->base + SPI_IO_CONTROL); 984 spi_ioc_orig = spi_ioc; 985 if (!val) 986 spi_ioc |= SPI_IO_C_FORCE_CS; 987 else 988 spi_ioc &= ~SPI_IO_C_FORCE_CS; 989 990 if (spi_ioc != spi_ioc_orig) 991 writel_relaxed(spi_ioc, controller->base + SPI_IO_CONTROL); 992 } 993 994 static int spi_qup_probe(struct platform_device *pdev) 995 { 996 struct spi_master *master; 997 struct clk *iclk, *cclk; 998 struct spi_qup *controller; 999 struct resource *res; 1000 struct device *dev; 1001 void __iomem *base; 1002 u32 max_freq, iomode, num_cs; 1003 int ret, irq, size; 1004 1005 dev = &pdev->dev; 1006 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1007 base = devm_ioremap_resource(dev, res); 1008 if (IS_ERR(base)) 1009 return PTR_ERR(base); 1010 1011 irq = platform_get_irq(pdev, 0); 1012 if (irq < 0) 1013 return irq; 1014 1015 cclk = devm_clk_get(dev, "core"); 1016 if (IS_ERR(cclk)) 1017 return PTR_ERR(cclk); 1018 1019 iclk = devm_clk_get(dev, "iface"); 1020 if (IS_ERR(iclk)) 1021 return PTR_ERR(iclk); 1022 1023 /* This is optional parameter */ 1024 if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq)) 1025 max_freq = SPI_MAX_RATE; 1026 1027 if (!max_freq || max_freq > SPI_MAX_RATE) { 1028 dev_err(dev, "invalid clock frequency %d\n", max_freq); 1029 return -ENXIO; 1030 } 1031 1032 ret = clk_prepare_enable(cclk); 1033 if (ret) { 1034 dev_err(dev, "cannot enable core clock\n"); 1035 return ret; 1036 } 1037 1038 ret = clk_prepare_enable(iclk); 1039 if (ret) { 1040 clk_disable_unprepare(cclk); 1041 dev_err(dev, "cannot enable iface clock\n"); 1042 return ret; 1043 } 1044 1045 master = spi_alloc_master(dev, sizeof(struct spi_qup)); 1046 if (!master) { 1047 clk_disable_unprepare(cclk); 1048 clk_disable_unprepare(iclk); 1049 dev_err(dev, "cannot allocate master\n"); 1050 return -ENOMEM; 1051 } 1052 1053 /* use num-cs unless not present or out of range */ 1054 if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) || 1055 num_cs > SPI_NUM_CHIPSELECTS) 1056 master->num_chipselect = SPI_NUM_CHIPSELECTS; 1057 else 1058 master->num_chipselect = num_cs; 1059 1060 master->bus_num = pdev->id; 1061 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; 1062 master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); 1063 master->max_speed_hz = max_freq; 1064 master->transfer_one = spi_qup_transfer_one; 1065 master->dev.of_node = pdev->dev.of_node; 1066 master->auto_runtime_pm = true; 1067 master->dma_alignment = dma_get_cache_alignment(); 1068 master->max_dma_len = SPI_MAX_XFER; 1069 1070 platform_set_drvdata(pdev, master); 1071 1072 controller = spi_master_get_devdata(master); 1073 1074 controller->dev = dev; 1075 controller->base = base; 1076 controller->iclk = iclk; 1077 controller->cclk = cclk; 1078 controller->irq = irq; 1079 1080 ret = spi_qup_init_dma(master, res->start); 1081 if (ret == -EPROBE_DEFER) 1082 goto error; 1083 else if (!ret) 1084 master->can_dma = spi_qup_can_dma; 1085 1086 controller->qup_v1 = (uintptr_t)of_device_get_match_data(dev); 1087 1088 if (!controller->qup_v1) 1089 master->set_cs = spi_qup_set_cs; 1090 1091 spin_lock_init(&controller->lock); 1092 init_completion(&controller->done); 1093 1094 iomode = readl_relaxed(base + QUP_IO_M_MODES); 1095 1096 size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode); 1097 if (size) 1098 controller->out_blk_sz = size * 16; 1099 else 1100 controller->out_blk_sz = 4; 1101 1102 size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode); 1103 if (size) 1104 controller->in_blk_sz = size * 16; 1105 else 1106 controller->in_blk_sz = 4; 1107 1108 size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode); 1109 controller->out_fifo_sz = controller->out_blk_sz * (2 << size); 1110 1111 size = QUP_IO_M_INPUT_FIFO_SIZE(iomode); 1112 controller->in_fifo_sz = controller->in_blk_sz * (2 << size); 1113 1114 dev_info(dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n", 1115 controller->in_blk_sz, controller->in_fifo_sz, 1116 controller->out_blk_sz, controller->out_fifo_sz); 1117 1118 writel_relaxed(1, base + QUP_SW_RESET); 1119 1120 ret = spi_qup_set_state(controller, QUP_STATE_RESET); 1121 if (ret) { 1122 dev_err(dev, "cannot set RESET state\n"); 1123 goto error_dma; 1124 } 1125 1126 writel_relaxed(0, base + QUP_OPERATIONAL); 1127 writel_relaxed(0, base + QUP_IO_M_MODES); 1128 1129 if (!controller->qup_v1) 1130 writel_relaxed(0, base + QUP_OPERATIONAL_MASK); 1131 1132 writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN, 1133 base + SPI_ERROR_FLAGS_EN); 1134 1135 /* if earlier version of the QUP, disable INPUT_OVERRUN */ 1136 if (controller->qup_v1) 1137 writel_relaxed(QUP_ERROR_OUTPUT_OVER_RUN | 1138 QUP_ERROR_INPUT_UNDER_RUN | QUP_ERROR_OUTPUT_UNDER_RUN, 1139 base + QUP_ERROR_FLAGS_EN); 1140 1141 writel_relaxed(0, base + SPI_CONFIG); 1142 writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL); 1143 1144 ret = devm_request_irq(dev, irq, spi_qup_qup_irq, 1145 IRQF_TRIGGER_HIGH, pdev->name, controller); 1146 if (ret) 1147 goto error_dma; 1148 1149 pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC); 1150 pm_runtime_use_autosuspend(dev); 1151 pm_runtime_set_active(dev); 1152 pm_runtime_enable(dev); 1153 1154 ret = devm_spi_register_master(dev, master); 1155 if (ret) 1156 goto disable_pm; 1157 1158 return 0; 1159 1160 disable_pm: 1161 pm_runtime_disable(&pdev->dev); 1162 error_dma: 1163 spi_qup_release_dma(master); 1164 error: 1165 clk_disable_unprepare(cclk); 1166 clk_disable_unprepare(iclk); 1167 spi_master_put(master); 1168 return ret; 1169 } 1170 1171 #ifdef CONFIG_PM 1172 static int spi_qup_pm_suspend_runtime(struct device *device) 1173 { 1174 struct spi_master *master = dev_get_drvdata(device); 1175 struct spi_qup *controller = spi_master_get_devdata(master); 1176 u32 config; 1177 1178 /* Enable clocks auto gaiting */ 1179 config = readl(controller->base + QUP_CONFIG); 1180 config |= QUP_CONFIG_CLOCK_AUTO_GATE; 1181 writel_relaxed(config, controller->base + QUP_CONFIG); 1182 1183 clk_disable_unprepare(controller->cclk); 1184 clk_disable_unprepare(controller->iclk); 1185 1186 return 0; 1187 } 1188 1189 static int spi_qup_pm_resume_runtime(struct device *device) 1190 { 1191 struct spi_master *master = dev_get_drvdata(device); 1192 struct spi_qup *controller = spi_master_get_devdata(master); 1193 u32 config; 1194 int ret; 1195 1196 ret = clk_prepare_enable(controller->iclk); 1197 if (ret) 1198 return ret; 1199 1200 ret = clk_prepare_enable(controller->cclk); 1201 if (ret) { 1202 clk_disable_unprepare(controller->iclk); 1203 return ret; 1204 } 1205 1206 /* Disable clocks auto gaiting */ 1207 config = readl_relaxed(controller->base + QUP_CONFIG); 1208 config &= ~QUP_CONFIG_CLOCK_AUTO_GATE; 1209 writel_relaxed(config, controller->base + QUP_CONFIG); 1210 return 0; 1211 } 1212 #endif /* CONFIG_PM */ 1213 1214 #ifdef CONFIG_PM_SLEEP 1215 static int spi_qup_suspend(struct device *device) 1216 { 1217 struct spi_master *master = dev_get_drvdata(device); 1218 struct spi_qup *controller = spi_master_get_devdata(master); 1219 int ret; 1220 1221 if (pm_runtime_suspended(device)) { 1222 ret = spi_qup_pm_resume_runtime(device); 1223 if (ret) 1224 return ret; 1225 } 1226 ret = spi_master_suspend(master); 1227 if (ret) 1228 return ret; 1229 1230 ret = spi_qup_set_state(controller, QUP_STATE_RESET); 1231 if (ret) 1232 return ret; 1233 1234 clk_disable_unprepare(controller->cclk); 1235 clk_disable_unprepare(controller->iclk); 1236 return 0; 1237 } 1238 1239 static int spi_qup_resume(struct device *device) 1240 { 1241 struct spi_master *master = dev_get_drvdata(device); 1242 struct spi_qup *controller = spi_master_get_devdata(master); 1243 int ret; 1244 1245 ret = clk_prepare_enable(controller->iclk); 1246 if (ret) 1247 return ret; 1248 1249 ret = clk_prepare_enable(controller->cclk); 1250 if (ret) { 1251 clk_disable_unprepare(controller->iclk); 1252 return ret; 1253 } 1254 1255 ret = spi_qup_set_state(controller, QUP_STATE_RESET); 1256 if (ret) 1257 goto disable_clk; 1258 1259 ret = spi_master_resume(master); 1260 if (ret) 1261 goto disable_clk; 1262 1263 return 0; 1264 1265 disable_clk: 1266 clk_disable_unprepare(controller->cclk); 1267 clk_disable_unprepare(controller->iclk); 1268 return ret; 1269 } 1270 #endif /* CONFIG_PM_SLEEP */ 1271 1272 static int spi_qup_remove(struct platform_device *pdev) 1273 { 1274 struct spi_master *master = dev_get_drvdata(&pdev->dev); 1275 struct spi_qup *controller = spi_master_get_devdata(master); 1276 int ret; 1277 1278 ret = pm_runtime_resume_and_get(&pdev->dev); 1279 if (ret < 0) 1280 return ret; 1281 1282 ret = spi_qup_set_state(controller, QUP_STATE_RESET); 1283 if (ret) 1284 return ret; 1285 1286 spi_qup_release_dma(master); 1287 1288 clk_disable_unprepare(controller->cclk); 1289 clk_disable_unprepare(controller->iclk); 1290 1291 pm_runtime_put_noidle(&pdev->dev); 1292 pm_runtime_disable(&pdev->dev); 1293 1294 return 0; 1295 } 1296 1297 static const struct of_device_id spi_qup_dt_match[] = { 1298 { .compatible = "qcom,spi-qup-v1.1.1", .data = (void *)1, }, 1299 { .compatible = "qcom,spi-qup-v2.1.1", }, 1300 { .compatible = "qcom,spi-qup-v2.2.1", }, 1301 { } 1302 }; 1303 MODULE_DEVICE_TABLE(of, spi_qup_dt_match); 1304 1305 static const struct dev_pm_ops spi_qup_dev_pm_ops = { 1306 SET_SYSTEM_SLEEP_PM_OPS(spi_qup_suspend, spi_qup_resume) 1307 SET_RUNTIME_PM_OPS(spi_qup_pm_suspend_runtime, 1308 spi_qup_pm_resume_runtime, 1309 NULL) 1310 }; 1311 1312 static struct platform_driver spi_qup_driver = { 1313 .driver = { 1314 .name = "spi_qup", 1315 .pm = &spi_qup_dev_pm_ops, 1316 .of_match_table = spi_qup_dt_match, 1317 }, 1318 .probe = spi_qup_probe, 1319 .remove = spi_qup_remove, 1320 }; 1321 module_platform_driver(spi_qup_driver); 1322 1323 MODULE_LICENSE("GPL v2"); 1324 MODULE_ALIAS("platform:spi_qup"); 1325