3  * Renesas RPC-IF core driver
19 #include <memory/renesas-rpc-if.h>
21 #include "renesas-rpc-if-regs.h"
47 	int (*hw_init)(struct rpcif_priv *rpc, bool hyperflash);
48 	void (*prepare)(struct rpcif_priv *rpc, const struct rpcif_op *op,
50 	int (*manual_xfer)(struct rpcif_priv *rpc);
51 	size_t (*dirmap_read)(struct rpcif_priv *rpc, u64 offs, size_t len,
97 	struct rpcif_priv *rpc = context;  in rpcif_reg_read()  local
102 		switch (rpc->xfer_size) {  in rpcif_reg_read()
104 			*val = readb(rpc->base + reg);  in rpcif_reg_read()
108 			*val = readw(rpc->base + reg);  in rpcif_reg_read()
113 			*val = readl(rpc->base + reg);  in rpcif_reg_read()
122 		if (rpc->xfer_size != 8)  in rpcif_reg_read()
127 	*val = readl(rpc->base + reg);  in rpcif_reg_read()
133 	struct rpcif_priv *rpc = context;  in rpcif_reg_write()  local
137 		switch (rpc->xfer_size) {  in rpcif_reg_write()
139 			writeb(val, rpc->base + reg);  in rpcif_reg_write()
143 			writew(val, rpc->base + reg);  in rpcif_reg_write()
148 			writel(val, rpc->base + reg);  in rpcif_reg_write()
156 		if (rpc->xfer_size != 8)  in rpcif_reg_write()
165 	writel(val, rpc->base + reg);  in rpcif_reg_write()
209 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_sw_init()  local
212 	rpcif->dirmap = rpc->dirmap;  in rpcif_sw_init()
213 	rpcif->size = rpc->size;  in rpcif_sw_init()
214 	rpcif->xspi = rpc->info->type == XSPI_RZ_G3E;  in rpcif_sw_init()
219 static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif_priv *rpc)  in rpcif_rzg2l_timing_adjust_sdr()  argument
221 	regmap_write(rpc->regmap, RPCIF_PHYWR, 0xa5390000);  in rpcif_rzg2l_timing_adjust_sdr()
222 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000000);  in rpcif_rzg2l_timing_adjust_sdr()
223 	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00008080);  in rpcif_rzg2l_timing_adjust_sdr()
224 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000022);  in rpcif_rzg2l_timing_adjust_sdr()
225 	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00008080);  in rpcif_rzg2l_timing_adjust_sdr()
226 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000024);  in rpcif_rzg2l_timing_adjust_sdr()
227 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_CKSEL(3),  in rpcif_rzg2l_timing_adjust_sdr()
229 	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00000030);  in rpcif_rzg2l_timing_adjust_sdr()
230 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000032);  in rpcif_rzg2l_timing_adjust_sdr()
233 static int rpcif_hw_init_impl(struct rpcif_priv *rpc, bool hyperflash)  in rpcif_hw_init_impl()  argument
238 	if (rpc->info->type == RPCIF_RZ_G2L) {  in rpcif_hw_init_impl()
239 		ret = reset_control_reset(rpc->rstc);  in rpcif_hw_init_impl()
243 		rpcif_rzg2l_timing_adjust_sdr(rpc);  in rpcif_hw_init_impl()
246 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_PHYMEM_MASK,  in rpcif_hw_init_impl()
250 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_HS, 0);  in rpcif_hw_init_impl()
252 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,  in rpcif_hw_init_impl()
254 			   RPCIF_PHYCNT_STRTIM(BIT(fls(rpc->info->strtim)) - 1),  in rpcif_hw_init_impl()
255 			   RPCIF_PHYCNT_STRTIM(rpc->info->strtim));  in rpcif_hw_init_impl()
257 	regmap_update_bits(rpc->regmap, RPCIF_PHYOFFSET1, RPCIF_PHYOFFSET1_DDRTMG(3),  in rpcif_hw_init_impl()
259 	regmap_update_bits(rpc->regmap, RPCIF_PHYOFFSET2, RPCIF_PHYOFFSET2_OCTTMG(7),  in rpcif_hw_init_impl()
263 		regmap_update_bits(rpc->regmap, RPCIF_PHYINT,  in rpcif_hw_init_impl()
266 	if (rpc->info->type == RPCIF_RZ_G2L)  in rpcif_hw_init_impl()
267 		regmap_update_bits(rpc->regmap, RPCIF_CMNCR,  in rpcif_hw_init_impl()
273 		regmap_update_bits(rpc->regmap, RPCIF_CMNCR,  in rpcif_hw_init_impl()
279 	regmap_write(rpc->regmap, RPCIF_DRCR, RPCIF_DRCR_RCF);  in rpcif_hw_init_impl()
281 	regmap_read(rpc->regmap, RPCIF_DRCR, &dummy);  in rpcif_hw_init_impl()
282 	regmap_write(rpc->regmap, RPCIF_SSLDR, RPCIF_SSLDR_SPNDL(7) |  in rpcif_hw_init_impl()
285 	rpc->bus_size = hyperflash ? 2 : 1;  in rpcif_hw_init_impl()
319 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_hw_init()  local
326 	ret = rpc->info->impl->hw_init(rpc, hyperflash);  in rpcif_hw_init()
334 static int wait_msg_xfer_end(struct rpcif_priv *rpc)  in wait_msg_xfer_end()  argument
338 	return regmap_read_poll_timeout(rpc->regmap, rpc->info->impl->status_reg,  in wait_msg_xfer_end()
339 					sts, sts & rpc->info->impl->status_mask,  in wait_msg_xfer_end()
343 static u8 rpcif_bits_set(struct rpcif_priv *rpc, u32 nbytes)  in rpcif_bits_set()  argument
345 	if (rpc->bus_size == 2)  in rpcif_bits_set()
356 static void rpcif_prepare_impl(struct rpcif_priv *rpc, const struct rpcif_op *op,  in rpcif_prepare_impl()  argument
359 	rpc->smcr = 0;  in rpcif_prepare_impl()
360 	rpc->smadr = 0;  in rpcif_prepare_impl()
361 	rpc->enable = 0;  in rpcif_prepare_impl()
362 	rpc->command = 0;  in rpcif_prepare_impl()
363 	rpc->option = 0;  in rpcif_prepare_impl()
364 	rpc->dummy = 0;  in rpcif_prepare_impl()
365 	rpc->ddr = 0;  in rpcif_prepare_impl()
366 	rpc->xferlen = 0;  in rpcif_prepare_impl()
369 		rpc->enable  = RPCIF_SMENR_CDE |  in rpcif_prepare_impl()
371 		rpc->command = RPCIF_SMCMR_CMD(op->cmd.opcode);  in rpcif_prepare_impl()
373 			rpc->ddr = RPCIF_SMDRENR_HYPE(0x5);  in rpcif_prepare_impl()
376 		rpc->enable  |= RPCIF_SMENR_OCDE |  in rpcif_prepare_impl()
378 		rpc->command |= RPCIF_SMCMR_OCMD(op->ocmd.opcode);  in rpcif_prepare_impl()
382 		rpc->enable |=  in rpcif_prepare_impl()
385 			rpc->enable |= RPCIF_SMENR_ADE(0xF);  in rpcif_prepare_impl()
387 			rpc->enable |= RPCIF_SMENR_ADE(GENMASK(  in rpcif_prepare_impl()
390 			rpc->ddr |= RPCIF_SMDRENR_ADDRE;  in rpcif_prepare_impl()
393 			rpc->smadr = *offs;  in rpcif_prepare_impl()
395 			rpc->smadr = op->addr.val;  in rpcif_prepare_impl()
399 		rpc->enable |= RPCIF_SMENR_DME;  in rpcif_prepare_impl()
400 		rpc->dummy = RPCIF_SMDMCR_DMCYC(op->dummy.ncycles);  in rpcif_prepare_impl()
404 		rpc->enable |= RPCIF_SMENR_OPDE(  in rpcif_prepare_impl()
405 			rpcif_bits_set(rpc, op->option.nbytes)) |  in rpcif_prepare_impl()
408 			rpc->ddr |= RPCIF_SMDRENR_OPDRE;  in rpcif_prepare_impl()
409 		rpc->option = op->option.val;  in rpcif_prepare_impl()
412 	rpc->dir = op->data.dir;  in rpcif_prepare_impl()
416 		rpc->buffer = op->data.buf.in;  in rpcif_prepare_impl()
419 			rpc->smcr = RPCIF_SMCR_SPIRE;  in rpcif_prepare_impl()
422 			rpc->smcr = RPCIF_SMCR_SPIWE;  in rpcif_prepare_impl()
428 			rpc->ddr |= RPCIF_SMDRENR_SPIDRE;  in rpcif_prepare_impl()
434 		rpc->xferlen = nbytes;  in rpcif_prepare_impl()
436 		rpc->enable |= RPCIF_SMENR_SPIDB(rpcif_bit_size(op->data.buswidth));  in rpcif_prepare_impl()
498 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_prepare()  local
500 	rpc->info->impl->prepare(rpc, op, offs, len);  in rpcif_prepare()
504 static int rpcif_manual_xfer_impl(struct rpcif_priv *rpc)  in rpcif_manual_xfer_impl()  argument
506 	u32 smenr, smcr, pos = 0, max = rpc->bus_size == 2 ? 8 : 4;  in rpcif_manual_xfer_impl()
509 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,  in rpcif_manual_xfer_impl()
511 	regmap_update_bits(rpc->regmap, RPCIF_CMNCR,  in rpcif_manual_xfer_impl()
513 	regmap_write(rpc->regmap, RPCIF_SMCMR, rpc->command);  in rpcif_manual_xfer_impl()
514 	regmap_write(rpc->regmap, RPCIF_SMOPR, rpc->option);  in rpcif_manual_xfer_impl()
515 	regmap_write(rpc->regmap, RPCIF_SMDMCR, rpc->dummy);  in rpcif_manual_xfer_impl()
516 	regmap_write(rpc->regmap, RPCIF_SMDRENR, rpc->ddr);  in rpcif_manual_xfer_impl()
517 	regmap_write(rpc->regmap, RPCIF_SMADR, rpc->smadr);  in rpcif_manual_xfer_impl()
518 	smenr = rpc->enable;  in rpcif_manual_xfer_impl()
520 	switch (rpc->dir) {  in rpcif_manual_xfer_impl()
522 		while (pos < rpc->xferlen) {  in rpcif_manual_xfer_impl()
523 			u32 bytes_left = rpc->xferlen - pos;  in rpcif_manual_xfer_impl()
526 			smcr = rpc->smcr | RPCIF_SMCR_SPIE;  in rpcif_manual_xfer_impl()
533 			smenr |= RPCIF_SMENR_SPIDE(rpcif_bits_set(rpc, nbytes));  in rpcif_manual_xfer_impl()
534 			regmap_write(rpc->regmap, RPCIF_SMENR, smenr);  in rpcif_manual_xfer_impl()
535 			rpc->xfer_size = nbytes;  in rpcif_manual_xfer_impl()
537 			memcpy(data, rpc->buffer + pos, nbytes);  in rpcif_manual_xfer_impl()
539 				regmap_write(rpc->regmap, RPCIF_SMWDR1, *p++);  in rpcif_manual_xfer_impl()
540 			regmap_write(rpc->regmap, RPCIF_SMWDR0, *p);  in rpcif_manual_xfer_impl()
542 			regmap_write(rpc->regmap, RPCIF_SMCR, smcr);  in rpcif_manual_xfer_impl()
543 			ret = wait_msg_xfer_end(rpc);  in rpcif_manual_xfer_impl()
548 			smenr = rpc->enable &  in rpcif_manual_xfer_impl()
554 		 * RPC-IF spoils the data for the commands without an address  in rpcif_manual_xfer_impl()
559 		if (!(smenr & RPCIF_SMENR_ADE(0xF)) && rpc->dirmap) {  in rpcif_manual_xfer_impl()
562 			regmap_update_bits(rpc->regmap, RPCIF_CMNCR,  in rpcif_manual_xfer_impl()
564 			regmap_write(rpc->regmap, RPCIF_DRCR,  in rpcif_manual_xfer_impl()
566 			regmap_write(rpc->regmap, RPCIF_DRCMR, rpc->command);  in rpcif_manual_xfer_impl()
567 			regmap_write(rpc->regmap, RPCIF_DREAR,  in rpcif_manual_xfer_impl()
569 			regmap_write(rpc->regmap, RPCIF_DROPR, rpc->option);  in rpcif_manual_xfer_impl()
570 			regmap_write(rpc->regmap, RPCIF_DRENR,  in rpcif_manual_xfer_impl()
572 			regmap_write(rpc->regmap, RPCIF_DRDMCR,  rpc->dummy);  in rpcif_manual_xfer_impl()
573 			regmap_write(rpc->regmap, RPCIF_DRDRENR, rpc->ddr);  in rpcif_manual_xfer_impl()
574 			memcpy_fromio(rpc->buffer, rpc->dirmap, rpc->xferlen);  in rpcif_manual_xfer_impl()
575 			regmap_write(rpc->regmap, RPCIF_DRCR, RPCIF_DRCR_RCF);  in rpcif_manual_xfer_impl()
577 			regmap_read(rpc->regmap, RPCIF_DRCR, &dummy);  in rpcif_manual_xfer_impl()
580 		while (pos < rpc->xferlen) {  in rpcif_manual_xfer_impl()
581 			u32 bytes_left = rpc->xferlen - pos;  in rpcif_manual_xfer_impl()
587 			regmap_write(rpc->regmap, RPCIF_SMADR,  in rpcif_manual_xfer_impl()
588 				     rpc->smadr + pos);  in rpcif_manual_xfer_impl()
590 			smenr |= RPCIF_SMENR_SPIDE(rpcif_bits_set(rpc, nbytes));  in rpcif_manual_xfer_impl()
591 			regmap_write(rpc->regmap, RPCIF_SMENR, smenr);  in rpcif_manual_xfer_impl()
592 			regmap_write(rpc->regmap, RPCIF_SMCR,  in rpcif_manual_xfer_impl()
593 				     rpc->smcr | RPCIF_SMCR_SPIE);  in rpcif_manual_xfer_impl()
594 			rpc->xfer_size = nbytes;  in rpcif_manual_xfer_impl()
595 			ret = wait_msg_xfer_end(rpc);  in rpcif_manual_xfer_impl()
600 				regmap_read(rpc->regmap, RPCIF_SMRDR1, p++);  in rpcif_manual_xfer_impl()
601 			regmap_read(rpc->regmap, RPCIF_SMRDR0, p);  in rpcif_manual_xfer_impl()
602 			memcpy(rpc->buffer + pos, data, nbytes);  in rpcif_manual_xfer_impl()
608 		regmap_write(rpc->regmap, RPCIF_SMENR, rpc->enable);  in rpcif_manual_xfer_impl()
609 		regmap_write(rpc->regmap, RPCIF_SMCR,  in rpcif_manual_xfer_impl()
610 			     rpc->smcr | RPCIF_SMCR_SPIE);  in rpcif_manual_xfer_impl()
611 		ret = wait_msg_xfer_end(rpc);  in rpcif_manual_xfer_impl()
619 	if (reset_control_reset(rpc->rstc))  in rpcif_manual_xfer_impl()
620 		dev_err(rpc->dev, "Failed to reset HW\n");  in rpcif_manual_xfer_impl()
621 	rpcif_hw_init_impl(rpc, rpc->bus_size == 2);  in rpcif_manual_xfer_impl()
767 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_manual_xfer()  local
774 	ret = rpc->info->impl->manual_xfer(rpc);  in rpcif_manual_xfer()
824 static size_t rpcif_dirmap_read_impl(struct rpcif_priv *rpc, u64 offs,  in rpcif_dirmap_read_impl()  argument
827 	loff_t from = offs & (rpc->size - 1);  in rpcif_dirmap_read_impl()
828 	size_t size = rpc->size - from;  in rpcif_dirmap_read_impl()
833 	regmap_update_bits(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_MD, 0);  in rpcif_dirmap_read_impl()
834 	regmap_write(rpc->regmap, RPCIF_DRCR, 0);  in rpcif_dirmap_read_impl()
835 	regmap_write(rpc->regmap, RPCIF_DRCMR, rpc->command);  in rpcif_dirmap_read_impl()
836 	regmap_write(rpc->regmap, RPCIF_DREAR,  in rpcif_dirmap_read_impl()
838 	regmap_write(rpc->regmap, RPCIF_DROPR, rpc->option);  in rpcif_dirmap_read_impl()
839 	regmap_write(rpc->regmap, RPCIF_DRENR,  in rpcif_dirmap_read_impl()
840 		     rpc->enable & ~RPCIF_SMENR_SPIDE(0xF));  in rpcif_dirmap_read_impl()
841 	regmap_write(rpc->regmap, RPCIF_DRDMCR, rpc->dummy);  in rpcif_dirmap_read_impl()
842 	regmap_write(rpc->regmap, RPCIF_DRDRENR, rpc->ddr);  in rpcif_dirmap_read_impl()
844 	if (rpc->bus_size == 2)  in rpcif_dirmap_read_impl()
845 		memcpy_fromio_readw(buf, rpc->dirmap + from, len);  in rpcif_dirmap_read_impl()
847 		memcpy_fromio(buf, rpc->dirmap + from, len);  in rpcif_dirmap_read_impl()
890 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_dirmap_read()  local
898 	read = rpc->info->impl->dirmap_read(rpc, offs, len, buf);  in rpcif_dirmap_read()
977 	struct rpcif_priv *rpc;  in rpcif_probe()  local
989 		name = "rpc-if-spi";  in rpcif_probe()
991 		name = "rpc-if-hyperflash";  in rpcif_probe()
999 	rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);  in rpcif_probe()
1000 	if (!rpc)  in rpcif_probe()
1003 	rpc->base = devm_platform_ioremap_resource_byname(pdev, "regs");  in rpcif_probe()
1004 	if (IS_ERR(rpc->base))  in rpcif_probe()
1005 		return PTR_ERR(rpc->base);  in rpcif_probe()
1006 	rpc->info = of_device_get_match_data(dev);  in rpcif_probe()
1007 	rpc->regmap = devm_regmap_init(dev, NULL, rpc, rpc->info->regmap_config);  in rpcif_probe()
1008 	if (IS_ERR(rpc->regmap)) {  in rpcif_probe()
1010 			PTR_ERR(rpc->regmap));  in rpcif_probe()
1011 		return	PTR_ERR(rpc->regmap);  in rpcif_probe()
1015 	rpc->dirmap = devm_ioremap_resource(dev, res);  in rpcif_probe()
1016 	if (IS_ERR(rpc->dirmap))  in rpcif_probe()
1017 		return PTR_ERR(rpc->dirmap);  in rpcif_probe()
1019 	rpc->size = resource_size(res);  in rpcif_probe()
1020 	rpc->rstc = devm_reset_control_array_get_exclusive(dev);  in rpcif_probe()
1021 	if (IS_ERR(rpc->rstc))  in rpcif_probe()
1022 		return PTR_ERR(rpc->rstc);  in rpcif_probe()
1029 	rpc->spix2_clk = devm_clk_get_optional_enabled(dev, "spix2");  in rpcif_probe()
1030 	if (IS_ERR(rpc->spix2_clk))  in rpcif_probe()
1031 		return dev_err_probe(dev, PTR_ERR(rpc->spix2_clk),  in rpcif_probe()
1034 	rpc->spi_clk = devm_clk_get_optional_enabled(dev, "spi");  in rpcif_probe()
1035 	if (IS_ERR(rpc->spi_clk))  in rpcif_probe()
1036 		return dev_err_probe(dev, PTR_ERR(rpc->spi_clk),  in rpcif_probe()
1044 	rpc->dev = dev;  in rpcif_probe()
1045 	rpc->vdev = vdev;  in rpcif_probe()
1046 	platform_set_drvdata(pdev, rpc);  in rpcif_probe()
1059 	struct rpcif_priv *rpc = platform_get_drvdata(pdev);  in rpcif_remove()  local
1061 	platform_device_unregister(rpc->vdev);  in rpcif_remove()
1066 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_suspend()  local
1068 	clk_disable_unprepare(rpc->spi_clk);  in rpcif_suspend()
1069 	clk_disable_unprepare(rpc->spix2_clk);  in rpcif_suspend()
1076 	struct rpcif_priv *rpc = dev_get_drvdata(dev);  in rpcif_resume()  local
1079 	ret = clk_prepare_enable(rpc->spix2_clk);  in rpcif_resume()
1085 	ret = clk_prepare_enable(rpc->spi_clk);  in rpcif_resume()
1087 		clk_disable_unprepare(rpc->spix2_clk);  in rpcif_resume()
1148 	{ .compatible = "renesas,r8a7796-rpc-if", .data = &rpcif_info_r8a7796 },
1150 	{ .compatible = "renesas,rcar-gen3-rpc-if", .data = &rpcif_info_gen3 },
1151 	{ .compatible = "renesas,rcar-gen4-rpc-if", .data = &rpcif_info_gen4 },
1152 	{ .compatible = "renesas,rzg2l-rpc-if", .data = &rpcif_info_rz_g2l },
1163 		.name =	"rpc-if",
1170 MODULE_DESCRIPTION("Renesas RPC-IF core driver");