Lines Matching +full:strobe +full:- +full:pos
1 // SPDX-License-Identifier: GPL-2.0
3 * Renesas RPC-IF core driver
5 * Copyright (C) 2018-2019 Renesas Solutions Corp.
7 * Copyright (C) 2019-2020 Cogent Embedded, Inc.
19 #include <memory/renesas-rpc-if.h>
45 #define RPCIF_DRCR_RBURST(v) ((((v) - 1) & 0x1F) << 16)
113 #define RPCIF_DMDMCR_DMCYC(v) ((((v) - 1) & 0x1F) << 0)
122 #define RPCIF_SMDMCR_DMCYC(v) ((((v) - 1) & 0x1F) << 0)
176 switch (rpc->xfer_size) { in rpcif_reg_read()
178 *val = readb(rpc->base + reg); in rpcif_reg_read()
182 *val = readw(rpc->base + reg); in rpcif_reg_read()
187 *val = readl(rpc->base + reg); in rpcif_reg_read()
191 return -EILSEQ; in rpcif_reg_read()
196 if (rpc->xfer_size != 8) in rpcif_reg_read()
197 return -EILSEQ; in rpcif_reg_read()
201 *val = readl(rpc->base + reg); in rpcif_reg_read()
212 switch (rpc->xfer_size) { in rpcif_reg_write()
214 writeb(val, rpc->base + reg); in rpcif_reg_write()
218 writew(val, rpc->base + reg); in rpcif_reg_write()
223 writel(val, rpc->base + reg); in rpcif_reg_write()
227 return -EILSEQ; in rpcif_reg_write()
231 if (rpc->xfer_size != 8) in rpcif_reg_write()
232 return -EILSEQ; in rpcif_reg_write()
237 return -EPERM; in rpcif_reg_write()
240 writel(val, rpc->base + reg); in rpcif_reg_write()
260 rpc->dev = dev; in rpcif_sw_init()
263 rpc->base = devm_ioremap_resource(&pdev->dev, res); in rpcif_sw_init()
264 if (IS_ERR(rpc->base)) in rpcif_sw_init()
265 return PTR_ERR(rpc->base); in rpcif_sw_init()
267 rpc->regmap = devm_regmap_init(&pdev->dev, NULL, rpc, &rpcif_regmap_config); in rpcif_sw_init()
268 if (IS_ERR(rpc->regmap)) { in rpcif_sw_init()
269 dev_err(&pdev->dev, in rpcif_sw_init()
271 PTR_ERR(rpc->regmap)); in rpcif_sw_init()
272 return PTR_ERR(rpc->regmap); in rpcif_sw_init()
276 rpc->dirmap = devm_ioremap_resource(&pdev->dev, res); in rpcif_sw_init()
277 if (IS_ERR(rpc->dirmap)) in rpcif_sw_init()
278 return PTR_ERR(rpc->dirmap); in rpcif_sw_init()
279 rpc->size = resource_size(res); in rpcif_sw_init()
281 rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); in rpcif_sw_init()
283 return PTR_ERR_OR_ZERO(rpc->rstc); in rpcif_sw_init()
289 pm_runtime_enable(rpc->dev); in rpcif_enable_rpm()
295 pm_runtime_disable(rpc->dev); in rpcif_disable_rpm()
303 pm_runtime_get_sync(rpc->dev); in rpcif_hw_init()
307 * RPCIF_PHYCNT_STRTIM is strobe timing adjustment bits, in rpcif_hw_init()
313 regmap_write(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_STRTIM(7) | in rpcif_hw_init()
322 regmap_write(rpc->regmap, RPCIF_PHYOFFSET1, 0x1511144 | in rpcif_hw_init()
324 regmap_write(rpc->regmap, RPCIF_PHYOFFSET2, 0x31 | in rpcif_hw_init()
328 regmap_update_bits(rpc->regmap, RPCIF_PHYINT, in rpcif_hw_init()
331 regmap_write(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_SFDE | in rpcif_hw_init()
335 regmap_write(rpc->regmap, RPCIF_DRCR, RPCIF_DRCR_RCF); in rpcif_hw_init()
337 regmap_read(rpc->regmap, RPCIF_DRCR, &dummy); in rpcif_hw_init()
338 regmap_write(rpc->regmap, RPCIF_SSLDR, RPCIF_SSLDR_SPNDL(7) | in rpcif_hw_init()
341 pm_runtime_put(rpc->dev); in rpcif_hw_init()
343 rpc->bus_size = hyperflash ? 2 : 1; in rpcif_hw_init()
351 return regmap_read_poll_timeout(rpc->regmap, RPCIF_CMNSR, sts, in wait_msg_xfer_end()
358 if (rpc->bus_size == 2) in rpcif_bits_set()
361 return GENMASK(3, 4 - nbytes); in rpcif_bits_set()
372 rpc->smcr = 0; in rpcif_prepare()
373 rpc->smadr = 0; in rpcif_prepare()
374 rpc->enable = 0; in rpcif_prepare()
375 rpc->command = 0; in rpcif_prepare()
376 rpc->option = 0; in rpcif_prepare()
377 rpc->dummy = 0; in rpcif_prepare()
378 rpc->ddr = 0; in rpcif_prepare()
379 rpc->xferlen = 0; in rpcif_prepare()
381 if (op->cmd.buswidth) { in rpcif_prepare()
382 rpc->enable = RPCIF_SMENR_CDE | in rpcif_prepare()
383 RPCIF_SMENR_CDB(rpcif_bit_size(op->cmd.buswidth)); in rpcif_prepare()
384 rpc->command = RPCIF_SMCMR_CMD(op->cmd.opcode); in rpcif_prepare()
385 if (op->cmd.ddr) in rpcif_prepare()
386 rpc->ddr = RPCIF_SMDRENR_HYPE(0x5); in rpcif_prepare()
388 if (op->ocmd.buswidth) { in rpcif_prepare()
389 rpc->enable |= RPCIF_SMENR_OCDE | in rpcif_prepare()
390 RPCIF_SMENR_OCDB(rpcif_bit_size(op->ocmd.buswidth)); in rpcif_prepare()
391 rpc->command |= RPCIF_SMCMR_OCMD(op->ocmd.opcode); in rpcif_prepare()
394 if (op->addr.buswidth) { in rpcif_prepare()
395 rpc->enable |= in rpcif_prepare()
396 RPCIF_SMENR_ADB(rpcif_bit_size(op->addr.buswidth)); in rpcif_prepare()
397 if (op->addr.nbytes == 4) in rpcif_prepare()
398 rpc->enable |= RPCIF_SMENR_ADE(0xF); in rpcif_prepare()
400 rpc->enable |= RPCIF_SMENR_ADE(GENMASK( in rpcif_prepare()
401 2, 3 - op->addr.nbytes)); in rpcif_prepare()
402 if (op->addr.ddr) in rpcif_prepare()
403 rpc->ddr |= RPCIF_SMDRENR_ADDRE; in rpcif_prepare()
406 rpc->smadr = *offs; in rpcif_prepare()
408 rpc->smadr = op->addr.val; in rpcif_prepare()
411 if (op->dummy.buswidth) { in rpcif_prepare()
412 rpc->enable |= RPCIF_SMENR_DME; in rpcif_prepare()
413 rpc->dummy = RPCIF_SMDMCR_DMCYC(op->dummy.ncycles / in rpcif_prepare()
414 op->dummy.buswidth); in rpcif_prepare()
417 if (op->option.buswidth) { in rpcif_prepare()
418 rpc->enable |= RPCIF_SMENR_OPDE( in rpcif_prepare()
419 rpcif_bits_set(rpc, op->option.nbytes)) | in rpcif_prepare()
420 RPCIF_SMENR_OPDB(rpcif_bit_size(op->option.buswidth)); in rpcif_prepare()
421 if (op->option.ddr) in rpcif_prepare()
422 rpc->ddr |= RPCIF_SMDRENR_OPDRE; in rpcif_prepare()
423 rpc->option = op->option.val; in rpcif_prepare()
426 rpc->dir = op->data.dir; in rpcif_prepare()
427 if (op->data.buswidth) { in rpcif_prepare()
430 rpc->buffer = op->data.buf.in; in rpcif_prepare()
431 switch (op->data.dir) { in rpcif_prepare()
433 rpc->smcr = RPCIF_SMCR_SPIRE; in rpcif_prepare()
436 rpc->smcr = RPCIF_SMCR_SPIWE; in rpcif_prepare()
441 if (op->data.ddr) in rpcif_prepare()
442 rpc->ddr |= RPCIF_SMDRENR_SPIDRE; in rpcif_prepare()
447 nbytes = op->data.nbytes; in rpcif_prepare()
448 rpc->xferlen = nbytes; in rpcif_prepare()
450 rpc->enable |= RPCIF_SMENR_SPIDB(rpcif_bit_size(op->data.buswidth)); in rpcif_prepare()
457 u32 smenr, smcr, pos = 0, max = rpc->bus_size == 2 ? 8 : 4; in rpcif_manual_xfer() local
460 pm_runtime_get_sync(rpc->dev); in rpcif_manual_xfer()
462 regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, in rpcif_manual_xfer()
464 regmap_update_bits(rpc->regmap, RPCIF_CMNCR, in rpcif_manual_xfer()
466 regmap_write(rpc->regmap, RPCIF_SMCMR, rpc->command); in rpcif_manual_xfer()
467 regmap_write(rpc->regmap, RPCIF_SMOPR, rpc->option); in rpcif_manual_xfer()
468 regmap_write(rpc->regmap, RPCIF_SMDMCR, rpc->dummy); in rpcif_manual_xfer()
469 regmap_write(rpc->regmap, RPCIF_SMDRENR, rpc->ddr); in rpcif_manual_xfer()
470 regmap_write(rpc->regmap, RPCIF_SMADR, rpc->smadr); in rpcif_manual_xfer()
471 smenr = rpc->enable; in rpcif_manual_xfer()
473 switch (rpc->dir) { in rpcif_manual_xfer()
475 while (pos < rpc->xferlen) { in rpcif_manual_xfer()
476 u32 bytes_left = rpc->xferlen - pos; in rpcif_manual_xfer()
479 smcr = rpc->smcr | RPCIF_SMCR_SPIE; in rpcif_manual_xfer()
487 regmap_write(rpc->regmap, RPCIF_SMENR, smenr); in rpcif_manual_xfer()
488 rpc->xfer_size = nbytes; in rpcif_manual_xfer()
490 memcpy(data, rpc->buffer + pos, nbytes); in rpcif_manual_xfer()
492 regmap_write(rpc->regmap, RPCIF_SMWDR1, in rpcif_manual_xfer()
494 regmap_write(rpc->regmap, RPCIF_SMWDR0, in rpcif_manual_xfer()
497 regmap_write(rpc->regmap, RPCIF_SMWDR0, in rpcif_manual_xfer()
501 regmap_write(rpc->regmap, RPCIF_SMCR, smcr); in rpcif_manual_xfer()
506 pos += nbytes; in rpcif_manual_xfer()
507 smenr = rpc->enable & in rpcif_manual_xfer()
513 * RPC-IF spoils the data for the commands without an address in rpcif_manual_xfer()
518 if (!(smenr & RPCIF_SMENR_ADE(0xF)) && rpc->dirmap) { in rpcif_manual_xfer()
521 regmap_update_bits(rpc->regmap, RPCIF_CMNCR, in rpcif_manual_xfer()
523 regmap_write(rpc->regmap, RPCIF_DRCR, in rpcif_manual_xfer()
525 regmap_write(rpc->regmap, RPCIF_DRCMR, rpc->command); in rpcif_manual_xfer()
526 regmap_write(rpc->regmap, RPCIF_DREAR, in rpcif_manual_xfer()
528 regmap_write(rpc->regmap, RPCIF_DROPR, rpc->option); in rpcif_manual_xfer()
529 regmap_write(rpc->regmap, RPCIF_DRENR, in rpcif_manual_xfer()
531 regmap_write(rpc->regmap, RPCIF_DRDMCR, rpc->dummy); in rpcif_manual_xfer()
532 regmap_write(rpc->regmap, RPCIF_DRDRENR, rpc->ddr); in rpcif_manual_xfer()
533 memcpy_fromio(rpc->buffer, rpc->dirmap, rpc->xferlen); in rpcif_manual_xfer()
534 regmap_write(rpc->regmap, RPCIF_DRCR, RPCIF_DRCR_RCF); in rpcif_manual_xfer()
536 regmap_read(rpc->regmap, RPCIF_DRCR, &dummy); in rpcif_manual_xfer()
539 while (pos < rpc->xferlen) { in rpcif_manual_xfer()
540 u32 bytes_left = rpc->xferlen - pos; in rpcif_manual_xfer()
546 regmap_write(rpc->regmap, RPCIF_SMADR, in rpcif_manual_xfer()
547 rpc->smadr + pos); in rpcif_manual_xfer()
550 regmap_write(rpc->regmap, RPCIF_SMENR, smenr); in rpcif_manual_xfer()
551 regmap_write(rpc->regmap, RPCIF_SMCR, in rpcif_manual_xfer()
552 rpc->smcr | RPCIF_SMCR_SPIE); in rpcif_manual_xfer()
553 rpc->xfer_size = nbytes; in rpcif_manual_xfer()
559 regmap_read(rpc->regmap, RPCIF_SMRDR1, in rpcif_manual_xfer()
561 regmap_read(rpc->regmap, RPCIF_SMRDR0, in rpcif_manual_xfer()
564 regmap_read(rpc->regmap, RPCIF_SMRDR0, in rpcif_manual_xfer()
567 memcpy(rpc->buffer + pos, data, nbytes); in rpcif_manual_xfer()
569 pos += nbytes; in rpcif_manual_xfer()
573 regmap_write(rpc->regmap, RPCIF_SMENR, rpc->enable); in rpcif_manual_xfer()
574 regmap_write(rpc->regmap, RPCIF_SMCR, in rpcif_manual_xfer()
575 rpc->smcr | RPCIF_SMCR_SPIE); in rpcif_manual_xfer()
582 pm_runtime_put(rpc->dev); in rpcif_manual_xfer()
586 if (reset_control_reset(rpc->rstc)) in rpcif_manual_xfer()
587 dev_err(rpc->dev, "Failed to reset HW\n"); in rpcif_manual_xfer()
588 rpcif_hw_init(rpc, rpc->bus_size == 2); in rpcif_manual_xfer()
595 loff_t from = offs & (RPCIF_DIRMAP_SIZE - 1); in rpcif_dirmap_read()
596 size_t size = RPCIF_DIRMAP_SIZE - from; in rpcif_dirmap_read()
601 pm_runtime_get_sync(rpc->dev); in rpcif_dirmap_read()
603 regmap_update_bits(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_MD, 0); in rpcif_dirmap_read()
604 regmap_write(rpc->regmap, RPCIF_DRCR, 0); in rpcif_dirmap_read()
605 regmap_write(rpc->regmap, RPCIF_DRCMR, rpc->command); in rpcif_dirmap_read()
606 regmap_write(rpc->regmap, RPCIF_DREAR, in rpcif_dirmap_read()
608 regmap_write(rpc->regmap, RPCIF_DROPR, rpc->option); in rpcif_dirmap_read()
609 regmap_write(rpc->regmap, RPCIF_DRENR, in rpcif_dirmap_read()
610 rpc->enable & ~RPCIF_SMENR_SPIDE(0xF)); in rpcif_dirmap_read()
611 regmap_write(rpc->regmap, RPCIF_DRDMCR, rpc->dummy); in rpcif_dirmap_read()
612 regmap_write(rpc->regmap, RPCIF_DRDRENR, rpc->ddr); in rpcif_dirmap_read()
614 memcpy_fromio(buf, rpc->dirmap + from, len); in rpcif_dirmap_read()
616 pm_runtime_put(rpc->dev); in rpcif_dirmap_read()
629 flash = of_get_next_child(pdev->dev.of_node, NULL); in rpcif_probe()
631 dev_warn(&pdev->dev, "no flash node found\n"); in rpcif_probe()
632 return -ENODEV; in rpcif_probe()
635 if (of_device_is_compatible(flash, "jedec,spi-nor")) { in rpcif_probe()
636 name = "rpc-if-spi"; in rpcif_probe()
637 } else if (of_device_is_compatible(flash, "cfi-flash")) { in rpcif_probe()
638 name = "rpc-if-hyperflash"; in rpcif_probe()
641 dev_warn(&pdev->dev, "unknown flash type\n"); in rpcif_probe()
642 return -ENODEV; in rpcif_probe()
646 vdev = platform_device_alloc(name, pdev->id); in rpcif_probe()
648 return -ENOMEM; in rpcif_probe()
649 vdev->dev.parent = &pdev->dev; in rpcif_probe()
671 { .compatible = "renesas,rcar-gen3-rpc-if", },
680 .name = "rpc-if",
686 MODULE_DESCRIPTION("Renesas RPC-IF core driver");