Commit 664ab2c992d1e06c4381f66c93d2e155fc7722e1
Committed by
Jagan Teki
Jagan Teki
1 parent
146bad9619
Exists in
v2017.01-smarct4x
and in
30 other branches
dma: ti-edma3: Add helper function to support edma3 transfer
Signed-off-by: Vignesh R <vigneshr@ti.com> Reviewed-by: Jagan Teki <jteki@openedev.com>
Showing 2 changed files with 80 additions and 0 deletions Side-by-side Diff
arch/arm/include/asm/ti-common/ti-edma3.h
| ... | ... | @@ -117,6 +117,8 @@ |
| 117 | 117 | void edma3_set_transfer_params(u32 base, int slot, int acnt, |
| 118 | 118 | int bcnt, int ccnt, u16 bcnt_rld, |
| 119 | 119 | enum edma3_sync_dimension sync_mode); |
| 120 | +void edma3_transfer(unsigned long edma3_base_addr, unsigned int | |
| 121 | + edma_slot_num, void *dst, void *src, size_t len); | |
| 120 | 122 | |
| 121 | 123 | #endif |
drivers/dma/ti-edma3.c
| ... | ... | @@ -382,4 +382,82 @@ |
| 382 | 382 | /* Clear the channel map */ |
| 383 | 383 | __raw_writel(0, base + EDMA3_QCHMAP(cfg->chnum)); |
| 384 | 384 | } |
| 385 | + | |
| 386 | +void edma3_transfer(unsigned long edma3_base_addr, unsigned int | |
| 387 | + edma_slot_num, void *dst, void *src, size_t len) | |
| 388 | +{ | |
| 389 | + struct edma3_slot_config slot; | |
| 390 | + struct edma3_channel_config edma_channel; | |
| 391 | + int b_cnt_value = 1; | |
| 392 | + int rem_bytes = 0; | |
| 393 | + int a_cnt_value = len; | |
| 394 | + unsigned int addr = (unsigned int) (dst); | |
| 395 | + unsigned int max_acnt = 0x7FFFU; | |
| 396 | + | |
| 397 | + if (len > max_acnt) { | |
| 398 | + b_cnt_value = (len / max_acnt); | |
| 399 | + rem_bytes = (len % max_acnt); | |
| 400 | + a_cnt_value = max_acnt; | |
| 401 | + } | |
| 402 | + | |
| 403 | + slot.opt = 0; | |
| 404 | + slot.src = ((unsigned int) src); | |
| 405 | + slot.acnt = a_cnt_value; | |
| 406 | + slot.bcnt = b_cnt_value; | |
| 407 | + slot.ccnt = 1; | |
| 408 | + slot.src_bidx = a_cnt_value; | |
| 409 | + slot.dst_bidx = a_cnt_value; | |
| 410 | + slot.src_cidx = 0; | |
| 411 | + slot.dst_cidx = 0; | |
| 412 | + slot.link = EDMA3_PARSET_NULL_LINK; | |
| 413 | + slot.bcntrld = 0; | |
| 414 | + slot.opt = EDMA3_SLOPT_TRANS_COMP_INT_ENB | | |
| 415 | + EDMA3_SLOPT_COMP_CODE(0) | | |
| 416 | + EDMA3_SLOPT_STATIC | EDMA3_SLOPT_AB_SYNC; | |
| 417 | + | |
| 418 | + edma3_slot_configure(edma3_base_addr, edma_slot_num, &slot); | |
| 419 | + edma_channel.slot = edma_slot_num; | |
| 420 | + edma_channel.chnum = 0; | |
| 421 | + edma_channel.complete_code = 0; | |
| 422 | + /* set event trigger to dst update */ | |
| 423 | + edma_channel.trigger_slot_word = EDMA3_TWORD(dst); | |
| 424 | + | |
| 425 | + qedma3_start(edma3_base_addr, &edma_channel); | |
| 426 | + edma3_set_dest_addr(edma3_base_addr, edma_channel.slot, addr); | |
| 427 | + | |
| 428 | + while (edma3_check_for_transfer(edma3_base_addr, &edma_channel)) | |
| 429 | + ; | |
| 430 | + qedma3_stop(edma3_base_addr, &edma_channel); | |
| 431 | + | |
| 432 | + if (rem_bytes != 0) { | |
| 433 | + slot.opt = 0; | |
| 434 | + slot.src = | |
| 435 | + (b_cnt_value * max_acnt) + ((unsigned int) src); | |
| 436 | + slot.acnt = rem_bytes; | |
| 437 | + slot.bcnt = 1; | |
| 438 | + slot.ccnt = 1; | |
| 439 | + slot.src_bidx = rem_bytes; | |
| 440 | + slot.dst_bidx = rem_bytes; | |
| 441 | + slot.src_cidx = 0; | |
| 442 | + slot.dst_cidx = 0; | |
| 443 | + slot.link = EDMA3_PARSET_NULL_LINK; | |
| 444 | + slot.bcntrld = 0; | |
| 445 | + slot.opt = EDMA3_SLOPT_TRANS_COMP_INT_ENB | | |
| 446 | + EDMA3_SLOPT_COMP_CODE(0) | | |
| 447 | + EDMA3_SLOPT_STATIC | EDMA3_SLOPT_AB_SYNC; | |
| 448 | + edma3_slot_configure(edma3_base_addr, edma_slot_num, &slot); | |
| 449 | + edma_channel.slot = edma_slot_num; | |
| 450 | + edma_channel.chnum = 0; | |
| 451 | + edma_channel.complete_code = 0; | |
| 452 | + /* set event trigger to dst update */ | |
| 453 | + edma_channel.trigger_slot_word = EDMA3_TWORD(dst); | |
| 454 | + | |
| 455 | + qedma3_start(edma3_base_addr, &edma_channel); | |
| 456 | + edma3_set_dest_addr(edma3_base_addr, edma_channel.slot, addr + | |
| 457 | + (max_acnt * b_cnt_value)); | |
| 458 | + while (edma3_check_for_transfer(edma3_base_addr, &edma_channel)) | |
| 459 | + ; | |
| 460 | + qedma3_stop(edma3_base_addr, &edma_channel); | |
| 461 | + } | |
| 462 | +} |