diff options
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi_bfin5xx.c | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index a85bcb306590..0e33b5aa35fb 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c | |||
@@ -186,7 +186,7 @@ static int flush(struct driver_data *drv_data) | |||
186 | 186 | ||
187 | /* wait for stop and clear stat */ | 187 | /* wait for stop and clear stat */ |
188 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF) && limit--) | 188 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF) && limit--) |
189 | continue; | 189 | cpu_relax(); |
190 | 190 | ||
191 | write_STAT(drv_data, BIT_STAT_CLR); | 191 | write_STAT(drv_data, BIT_STAT_CLR); |
192 | 192 | ||
@@ -262,7 +262,7 @@ static void null_writer(struct driver_data *drv_data) | |||
262 | while (drv_data->tx < drv_data->tx_end) { | 262 | while (drv_data->tx < drv_data->tx_end) { |
263 | write_TDBR(drv_data, 0); | 263 | write_TDBR(drv_data, 0); |
264 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) | 264 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) |
265 | continue; | 265 | cpu_relax(); |
266 | drv_data->tx += n_bytes; | 266 | drv_data->tx += n_bytes; |
267 | } | 267 | } |
268 | } | 268 | } |
@@ -274,7 +274,7 @@ static void null_reader(struct driver_data *drv_data) | |||
274 | 274 | ||
275 | while (drv_data->rx < drv_data->rx_end) { | 275 | while (drv_data->rx < drv_data->rx_end) { |
276 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 276 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
277 | continue; | 277 | cpu_relax(); |
278 | dummy_read(drv_data); | 278 | dummy_read(drv_data); |
279 | drv_data->rx += n_bytes; | 279 | drv_data->rx += n_bytes; |
280 | } | 280 | } |
@@ -287,12 +287,12 @@ static void u8_writer(struct driver_data *drv_data) | |||
287 | 287 | ||
288 | /* poll for SPI completion before start */ | 288 | /* poll for SPI completion before start */ |
289 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 289 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
290 | continue; | 290 | cpu_relax(); |
291 | 291 | ||
292 | while (drv_data->tx < drv_data->tx_end) { | 292 | while (drv_data->tx < drv_data->tx_end) { |
293 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); | 293 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); |
294 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 294 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
295 | continue; | 295 | cpu_relax(); |
296 | ++drv_data->tx; | 296 | ++drv_data->tx; |
297 | } | 297 | } |
298 | } | 298 | } |
@@ -303,14 +303,14 @@ static void u8_cs_chg_writer(struct driver_data *drv_data) | |||
303 | 303 | ||
304 | /* poll for SPI completion before start */ | 304 | /* poll for SPI completion before start */ |
305 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 305 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
306 | continue; | 306 | cpu_relax(); |
307 | 307 | ||
308 | while (drv_data->tx < drv_data->tx_end) { | 308 | while (drv_data->tx < drv_data->tx_end) { |
309 | cs_active(drv_data, chip); | 309 | cs_active(drv_data, chip); |
310 | 310 | ||
311 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); | 311 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); |
312 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 312 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
313 | continue; | 313 | cpu_relax(); |
314 | 314 | ||
315 | cs_deactive(drv_data, chip); | 315 | cs_deactive(drv_data, chip); |
316 | 316 | ||
@@ -325,7 +325,7 @@ static void u8_reader(struct driver_data *drv_data) | |||
325 | 325 | ||
326 | /* poll for SPI completion before start */ | 326 | /* poll for SPI completion before start */ |
327 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 327 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
328 | continue; | 328 | cpu_relax(); |
329 | 329 | ||
330 | /* clear TDBR buffer before read(else it will be shifted out) */ | 330 | /* clear TDBR buffer before read(else it will be shifted out) */ |
331 | write_TDBR(drv_data, 0xFFFF); | 331 | write_TDBR(drv_data, 0xFFFF); |
@@ -334,13 +334,13 @@ static void u8_reader(struct driver_data *drv_data) | |||
334 | 334 | ||
335 | while (drv_data->rx < drv_data->rx_end - 1) { | 335 | while (drv_data->rx < drv_data->rx_end - 1) { |
336 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 336 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
337 | continue; | 337 | cpu_relax(); |
338 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); | 338 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); |
339 | ++drv_data->rx; | 339 | ++drv_data->rx; |
340 | } | 340 | } |
341 | 341 | ||
342 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 342 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
343 | continue; | 343 | cpu_relax(); |
344 | *(u8 *) (drv_data->rx) = read_SHAW(drv_data); | 344 | *(u8 *) (drv_data->rx) = read_SHAW(drv_data); |
345 | ++drv_data->rx; | 345 | ++drv_data->rx; |
346 | } | 346 | } |
@@ -351,7 +351,7 @@ static void u8_cs_chg_reader(struct driver_data *drv_data) | |||
351 | 351 | ||
352 | /* poll for SPI completion before start */ | 352 | /* poll for SPI completion before start */ |
353 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 353 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
354 | continue; | 354 | cpu_relax(); |
355 | 355 | ||
356 | /* clear TDBR buffer before read(else it will be shifted out) */ | 356 | /* clear TDBR buffer before read(else it will be shifted out) */ |
357 | write_TDBR(drv_data, 0xFFFF); | 357 | write_TDBR(drv_data, 0xFFFF); |
@@ -363,7 +363,7 @@ static void u8_cs_chg_reader(struct driver_data *drv_data) | |||
363 | cs_deactive(drv_data, chip); | 363 | cs_deactive(drv_data, chip); |
364 | 364 | ||
365 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 365 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
366 | continue; | 366 | cpu_relax(); |
367 | cs_active(drv_data, chip); | 367 | cs_active(drv_data, chip); |
368 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); | 368 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); |
369 | ++drv_data->rx; | 369 | ++drv_data->rx; |
@@ -371,7 +371,7 @@ static void u8_cs_chg_reader(struct driver_data *drv_data) | |||
371 | cs_deactive(drv_data, chip); | 371 | cs_deactive(drv_data, chip); |
372 | 372 | ||
373 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 373 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
374 | continue; | 374 | cpu_relax(); |
375 | *(u8 *) (drv_data->rx) = read_SHAW(drv_data); | 375 | *(u8 *) (drv_data->rx) = read_SHAW(drv_data); |
376 | ++drv_data->rx; | 376 | ++drv_data->rx; |
377 | } | 377 | } |
@@ -380,15 +380,15 @@ static void u8_duplex(struct driver_data *drv_data) | |||
380 | { | 380 | { |
381 | /* poll for SPI completion before start */ | 381 | /* poll for SPI completion before start */ |
382 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 382 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
383 | continue; | 383 | cpu_relax(); |
384 | 384 | ||
385 | /* in duplex mode, clk is triggered by writing of TDBR */ | 385 | /* in duplex mode, clk is triggered by writing of TDBR */ |
386 | while (drv_data->rx < drv_data->rx_end) { | 386 | while (drv_data->rx < drv_data->rx_end) { |
387 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); | 387 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); |
388 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 388 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
389 | continue; | 389 | cpu_relax(); |
390 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 390 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
391 | continue; | 391 | cpu_relax(); |
392 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); | 392 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); |
393 | ++drv_data->rx; | 393 | ++drv_data->rx; |
394 | ++drv_data->tx; | 394 | ++drv_data->tx; |
@@ -401,16 +401,16 @@ static void u8_cs_chg_duplex(struct driver_data *drv_data) | |||
401 | 401 | ||
402 | /* poll for SPI completion before start */ | 402 | /* poll for SPI completion before start */ |
403 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 403 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
404 | continue; | 404 | cpu_relax(); |
405 | 405 | ||
406 | while (drv_data->rx < drv_data->rx_end) { | 406 | while (drv_data->rx < drv_data->rx_end) { |
407 | cs_active(drv_data, chip); | 407 | cs_active(drv_data, chip); |
408 | 408 | ||
409 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); | 409 | write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); |
410 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 410 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
411 | continue; | 411 | cpu_relax(); |
412 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 412 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
413 | continue; | 413 | cpu_relax(); |
414 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); | 414 | *(u8 *) (drv_data->rx) = read_RDBR(drv_data); |
415 | 415 | ||
416 | cs_deactive(drv_data, chip); | 416 | cs_deactive(drv_data, chip); |
@@ -427,12 +427,12 @@ static void u16_writer(struct driver_data *drv_data) | |||
427 | 427 | ||
428 | /* poll for SPI completion before start */ | 428 | /* poll for SPI completion before start */ |
429 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 429 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
430 | continue; | 430 | cpu_relax(); |
431 | 431 | ||
432 | while (drv_data->tx < drv_data->tx_end) { | 432 | while (drv_data->tx < drv_data->tx_end) { |
433 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); | 433 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); |
434 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) | 434 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) |
435 | continue; | 435 | cpu_relax(); |
436 | drv_data->tx += 2; | 436 | drv_data->tx += 2; |
437 | } | 437 | } |
438 | } | 438 | } |
@@ -443,14 +443,14 @@ static void u16_cs_chg_writer(struct driver_data *drv_data) | |||
443 | 443 | ||
444 | /* poll for SPI completion before start */ | 444 | /* poll for SPI completion before start */ |
445 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 445 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
446 | continue; | 446 | cpu_relax(); |
447 | 447 | ||
448 | while (drv_data->tx < drv_data->tx_end) { | 448 | while (drv_data->tx < drv_data->tx_end) { |
449 | cs_active(drv_data, chip); | 449 | cs_active(drv_data, chip); |
450 | 450 | ||
451 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); | 451 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); |
452 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) | 452 | while ((read_STAT(drv_data) & BIT_STAT_TXS)) |
453 | continue; | 453 | cpu_relax(); |
454 | 454 | ||
455 | cs_deactive(drv_data, chip); | 455 | cs_deactive(drv_data, chip); |
456 | 456 | ||
@@ -465,7 +465,7 @@ static void u16_reader(struct driver_data *drv_data) | |||
465 | 465 | ||
466 | /* poll for SPI completion before start */ | 466 | /* poll for SPI completion before start */ |
467 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 467 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
468 | continue; | 468 | cpu_relax(); |
469 | 469 | ||
470 | /* clear TDBR buffer before read(else it will be shifted out) */ | 470 | /* clear TDBR buffer before read(else it will be shifted out) */ |
471 | write_TDBR(drv_data, 0xFFFF); | 471 | write_TDBR(drv_data, 0xFFFF); |
@@ -474,13 +474,13 @@ static void u16_reader(struct driver_data *drv_data) | |||
474 | 474 | ||
475 | while (drv_data->rx < (drv_data->rx_end - 2)) { | 475 | while (drv_data->rx < (drv_data->rx_end - 2)) { |
476 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 476 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
477 | continue; | 477 | cpu_relax(); |
478 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); | 478 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); |
479 | drv_data->rx += 2; | 479 | drv_data->rx += 2; |
480 | } | 480 | } |
481 | 481 | ||
482 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 482 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
483 | continue; | 483 | cpu_relax(); |
484 | *(u16 *) (drv_data->rx) = read_SHAW(drv_data); | 484 | *(u16 *) (drv_data->rx) = read_SHAW(drv_data); |
485 | drv_data->rx += 2; | 485 | drv_data->rx += 2; |
486 | } | 486 | } |
@@ -491,7 +491,7 @@ static void u16_cs_chg_reader(struct driver_data *drv_data) | |||
491 | 491 | ||
492 | /* poll for SPI completion before start */ | 492 | /* poll for SPI completion before start */ |
493 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 493 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
494 | continue; | 494 | cpu_relax(); |
495 | 495 | ||
496 | /* clear TDBR buffer before read(else it will be shifted out) */ | 496 | /* clear TDBR buffer before read(else it will be shifted out) */ |
497 | write_TDBR(drv_data, 0xFFFF); | 497 | write_TDBR(drv_data, 0xFFFF); |
@@ -503,7 +503,7 @@ static void u16_cs_chg_reader(struct driver_data *drv_data) | |||
503 | cs_deactive(drv_data, chip); | 503 | cs_deactive(drv_data, chip); |
504 | 504 | ||
505 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 505 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
506 | continue; | 506 | cpu_relax(); |
507 | cs_active(drv_data, chip); | 507 | cs_active(drv_data, chip); |
508 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); | 508 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); |
509 | drv_data->rx += 2; | 509 | drv_data->rx += 2; |
@@ -511,7 +511,7 @@ static void u16_cs_chg_reader(struct driver_data *drv_data) | |||
511 | cs_deactive(drv_data, chip); | 511 | cs_deactive(drv_data, chip); |
512 | 512 | ||
513 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 513 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
514 | continue; | 514 | cpu_relax(); |
515 | *(u16 *) (drv_data->rx) = read_SHAW(drv_data); | 515 | *(u16 *) (drv_data->rx) = read_SHAW(drv_data); |
516 | drv_data->rx += 2; | 516 | drv_data->rx += 2; |
517 | } | 517 | } |
@@ -520,15 +520,15 @@ static void u16_duplex(struct driver_data *drv_data) | |||
520 | { | 520 | { |
521 | /* poll for SPI completion before start */ | 521 | /* poll for SPI completion before start */ |
522 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 522 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
523 | continue; | 523 | cpu_relax(); |
524 | 524 | ||
525 | /* in duplex mode, clk is triggered by writing of TDBR */ | 525 | /* in duplex mode, clk is triggered by writing of TDBR */ |
526 | while (drv_data->tx < drv_data->tx_end) { | 526 | while (drv_data->tx < drv_data->tx_end) { |
527 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); | 527 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); |
528 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 528 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
529 | continue; | 529 | cpu_relax(); |
530 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 530 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
531 | continue; | 531 | cpu_relax(); |
532 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); | 532 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); |
533 | drv_data->rx += 2; | 533 | drv_data->rx += 2; |
534 | drv_data->tx += 2; | 534 | drv_data->tx += 2; |
@@ -541,16 +541,16 @@ static void u16_cs_chg_duplex(struct driver_data *drv_data) | |||
541 | 541 | ||
542 | /* poll for SPI completion before start */ | 542 | /* poll for SPI completion before start */ |
543 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 543 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
544 | continue; | 544 | cpu_relax(); |
545 | 545 | ||
546 | while (drv_data->tx < drv_data->tx_end) { | 546 | while (drv_data->tx < drv_data->tx_end) { |
547 | cs_active(drv_data, chip); | 547 | cs_active(drv_data, chip); |
548 | 548 | ||
549 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); | 549 | write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); |
550 | while (read_STAT(drv_data) & BIT_STAT_TXS) | 550 | while (read_STAT(drv_data) & BIT_STAT_TXS) |
551 | continue; | 551 | cpu_relax(); |
552 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) | 552 | while (!(read_STAT(drv_data) & BIT_STAT_RXS)) |
553 | continue; | 553 | cpu_relax(); |
554 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); | 554 | *(u16 *) (drv_data->rx) = read_RDBR(drv_data); |
555 | 555 | ||
556 | cs_deactive(drv_data, chip); | 556 | cs_deactive(drv_data, chip); |
@@ -624,7 +624,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) | |||
624 | 624 | ||
625 | /* Wait for DMA to complete */ | 625 | /* Wait for DMA to complete */ |
626 | while (get_dma_curr_irqstat(drv_data->dma_channel) & DMA_RUN) | 626 | while (get_dma_curr_irqstat(drv_data->dma_channel) & DMA_RUN) |
627 | continue; | 627 | cpu_relax(); |
628 | 628 | ||
629 | /* | 629 | /* |
630 | * wait for the last transaction shifted out. HRM states: | 630 | * wait for the last transaction shifted out. HRM states: |
@@ -635,11 +635,11 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) | |||
635 | if (drv_data->tx != NULL) { | 635 | if (drv_data->tx != NULL) { |
636 | while ((read_STAT(drv_data) & TXS) || | 636 | while ((read_STAT(drv_data) & TXS) || |
637 | (read_STAT(drv_data) & TXS)) | 637 | (read_STAT(drv_data) & TXS)) |
638 | continue; | 638 | cpu_relax(); |
639 | } | 639 | } |
640 | 640 | ||
641 | while (!(read_STAT(drv_data) & SPIF)) | 641 | while (!(read_STAT(drv_data) & SPIF)) |
642 | continue; | 642 | cpu_relax(); |
643 | 643 | ||
644 | msg->actual_length += drv_data->len_in_bytes; | 644 | msg->actual_length += drv_data->len_in_bytes; |
645 | 645 | ||
@@ -783,7 +783,7 @@ static void pump_transfers(unsigned long data) | |||
783 | 783 | ||
784 | /* poll for SPI completion before start */ | 784 | /* poll for SPI completion before start */ |
785 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) | 785 | while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) |
786 | continue; | 786 | cpu_relax(); |
787 | 787 | ||
788 | /* dirty hack for autobuffer DMA mode */ | 788 | /* dirty hack for autobuffer DMA mode */ |
789 | if (drv_data->tx_dma == 0xFFFF) { | 789 | if (drv_data->tx_dma == 0xFFFF) { |