146  * struct stm32_fmc2_prop - STM32 FMC2 EBI property
169 	int (*check)(struct stm32_fmc2_ebi *ebi,
171 	u32 (*calculate)(struct stm32_fmc2_ebi *ebi, int cs, u32 setup);
172 	int (*set)(struct stm32_fmc2_ebi *ebi,
177 static int stm32_fmc2_ebi_check_mux(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_mux()  argument
183 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_mux()
191 static int stm32_fmc2_ebi_check_waitcfg(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_waitcfg()  argument
197 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_waitcfg()
205 static int stm32_fmc2_ebi_check_sync_trans(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_sync_trans()  argument
211 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_sync_trans()
219 static int stm32_fmc2_ebi_check_async_trans(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_async_trans()  argument
225 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_async_trans()
233 static int stm32_fmc2_ebi_check_cpsize(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_cpsize()  argument
239 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_cpsize()
247 static int stm32_fmc2_ebi_check_address_hold(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_address_hold()  argument
253 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_address_hold()
255 		regmap_read(ebi->regmap, FMC2_BWTR(cs), &bxtr);  in stm32_fmc2_ebi_check_address_hold()
257 		regmap_read(ebi->regmap, FMC2_BTR(cs), &bxtr);  in stm32_fmc2_ebi_check_address_hold()
266 static int stm32_fmc2_ebi_check_clk_period(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_clk_period()  argument
272 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_check_clk_period()
274 		regmap_read(ebi->regmap, FMC2_BCR1, &bcr1);  in stm32_fmc2_ebi_check_clk_period()
284 static int stm32_fmc2_ebi_check_cclk(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_check_cclk()  argument
291 	return stm32_fmc2_ebi_check_sync_trans(ebi, prop, cs);  in stm32_fmc2_ebi_check_cclk()
294 static u32 stm32_fmc2_ebi_ns_to_clock_cycles(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_ns_to_clock_cycles()  argument
297 	unsigned long hclk = clk_get_rate(ebi->clk);  in stm32_fmc2_ebi_ns_to_clock_cycles()
303 static u32 stm32_fmc2_ebi_ns_to_clk_period(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_ns_to_clk_period()  argument
306 	u32 nb_clk_cycles = stm32_fmc2_ebi_ns_to_clock_cycles(ebi, cs, setup);  in stm32_fmc2_ebi_ns_to_clk_period()
309 	regmap_read(ebi->regmap, FMC2_BCR1, &bcr);  in stm32_fmc2_ebi_ns_to_clk_period()
311 		regmap_read(ebi->regmap, FMC2_BTR1, &btr);  in stm32_fmc2_ebi_ns_to_clk_period()
313 		regmap_read(ebi->regmap, FMC2_BTR(cs), &btr);  in stm32_fmc2_ebi_ns_to_clk_period()
342 static int stm32_fmc2_ebi_set_bit_field(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_bit_field()  argument
353 	regmap_update_bits(ebi->regmap, reg, prop->reg_mask,  in stm32_fmc2_ebi_set_bit_field()
359 static int stm32_fmc2_ebi_set_trans_type(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_trans_type()  argument
484 		regmap_update_bits(ebi->regmap, FMC2_BWTR(cs),  in stm32_fmc2_ebi_set_trans_type()
486 	regmap_update_bits(ebi->regmap, FMC2_BTR(cs), btr_mask, btr);  in stm32_fmc2_ebi_set_trans_type()
487 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs), bcr_mask, bcr);  in stm32_fmc2_ebi_set_trans_type()
492 static int stm32_fmc2_ebi_set_buswidth(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_buswidth()  argument
510 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs), FMC2_BCR_MWID, val);  in stm32_fmc2_ebi_set_buswidth()
515 static int stm32_fmc2_ebi_set_cpsize(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_cpsize()  argument
542 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs), FMC2_BCR_CPSIZE, val);  in stm32_fmc2_ebi_set_cpsize()
547 static int stm32_fmc2_ebi_set_bl_setup(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_bl_setup()  argument
555 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs), FMC2_BCR_NBLSET, val);  in stm32_fmc2_ebi_set_bl_setup()
560 static int stm32_fmc2_ebi_set_address_setup(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_address_setup()  argument
572 	regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_set_address_setup()
574 		regmap_read(ebi->regmap, FMC2_BWTR(cs), &bxtr);  in stm32_fmc2_ebi_set_address_setup()
576 		regmap_read(ebi->regmap, FMC2_BTR(cs), &bxtr);  in stm32_fmc2_ebi_set_address_setup()
583 	regmap_update_bits(ebi->regmap, reg, FMC2_BXTR_ADDSET, val);  in stm32_fmc2_ebi_set_address_setup()
588 static int stm32_fmc2_ebi_set_address_hold(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_address_hold()  argument
601 	regmap_update_bits(ebi->regmap, reg, FMC2_BXTR_ADDHLD, val);  in stm32_fmc2_ebi_set_address_hold()
606 static int stm32_fmc2_ebi_set_data_setup(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_data_setup()  argument
619 	regmap_update_bits(ebi->regmap, reg, FMC2_BXTR_DATAST, val);  in stm32_fmc2_ebi_set_data_setup()
624 static int stm32_fmc2_ebi_set_bus_turnaround(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_bus_turnaround()  argument
637 	regmap_update_bits(ebi->regmap, reg, FMC2_BXTR_BUSTURN, val);  in stm32_fmc2_ebi_set_bus_turnaround()
642 static int stm32_fmc2_ebi_set_data_hold(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_data_hold()  argument
658 	regmap_update_bits(ebi->regmap, reg, FMC2_BXTR_DATAHLD, val);  in stm32_fmc2_ebi_set_data_hold()
663 static int stm32_fmc2_ebi_set_clk_period(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_clk_period()  argument
671 	regmap_update_bits(ebi->regmap, FMC2_BTR(cs), FMC2_BTR_CLKDIV, val);  in stm32_fmc2_ebi_set_clk_period()
676 static int stm32_fmc2_ebi_set_data_latency(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_data_latency()  argument
684 	regmap_update_bits(ebi->regmap, FMC2_BTR(cs), FMC2_BTR_DATLAT, val);  in stm32_fmc2_ebi_set_data_latency()
689 static int stm32_fmc2_ebi_set_max_low_pulse(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_set_max_low_pulse()  argument
698 	regmap_read(ebi->regmap, FMC2_PCSCNTR, &pcscntr);  in stm32_fmc2_ebi_set_max_low_pulse()
701 	regmap_update_bits(ebi->regmap, FMC2_PCSCNTR,  in stm32_fmc2_ebi_set_max_low_pulse()
712 	regmap_update_bits(ebi->regmap, FMC2_PCSCNTR,  in stm32_fmc2_ebi_set_max_low_pulse()
719 	/* st,fmc2-ebi-cs-trans-type must be the first property */
721 		.name = "st,fmc2-ebi-cs-transaction-type",
726 		.name = "st,fmc2-ebi-cs-cclk-enable",
734 		.name = "st,fmc2-ebi-cs-mux-enable",
742 		.name = "st,fmc2-ebi-cs-buswidth",
747 		.name = "st,fmc2-ebi-cs-waitpol-high",
754 		.name = "st,fmc2-ebi-cs-waitcfg-enable",
762 		.name = "st,fmc2-ebi-cs-wait-enable",
770 		.name = "st,fmc2-ebi-cs-asyncwait-enable",
778 		.name = "st,fmc2-ebi-cs-cpsize",
783 		.name = "st,fmc2-ebi-cs-byte-lane-setup-ns",
788 		.name = "st,fmc2-ebi-cs-address-setup-ns",
796 		.name = "st,fmc2-ebi-cs-address-hold-ns",
804 		.name = "st,fmc2-ebi-cs-data-setup-ns",
812 		.name = "st,fmc2-ebi-cs-bus-turnaround-ns",
819 		.name = "st,fmc2-ebi-cs-data-hold-ns",
826 		.name = "st,fmc2-ebi-cs-clk-period-ns",
833 		.name = "st,fmc2-ebi-cs-data-latency-ns",
839 		.name = "st,fmc2-ebi-cs-write-address-setup-ns",
847 		.name = "st,fmc2-ebi-cs-write-address-hold-ns",
855 		.name = "st,fmc2-ebi-cs-write-data-setup-ns",
863 		.name = "st,fmc2-ebi-cs-write-bus-turnaround-ns",
870 		.name = "st,fmc2-ebi-cs-write-data-hold-ns",
877 		.name = "st,fmc2-ebi-cs-max-low-pulse-ns",
883 static int stm32_fmc2_ebi_parse_prop(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_parse_prop()  argument
888 	struct device *dev = ebi->dev;  in stm32_fmc2_ebi_parse_prop()
896 	if (prop->check && prop->check(ebi, prop, cs))  in stm32_fmc2_ebi_parse_prop()
926 			setup = prop->calculate(ebi, cs, val);  in stm32_fmc2_ebi_parse_prop()
931 	return prop->set(ebi, prop, cs, setup);  in stm32_fmc2_ebi_parse_prop()
934 static void stm32_fmc2_ebi_enable_bank(struct stm32_fmc2_ebi *ebi, int cs)  in stm32_fmc2_ebi_enable_bank()  argument
936 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs),  in stm32_fmc2_ebi_enable_bank()
940 static void stm32_fmc2_ebi_disable_bank(struct stm32_fmc2_ebi *ebi, int cs)  in stm32_fmc2_ebi_disable_bank()  argument
942 	regmap_update_bits(ebi->regmap, FMC2_BCR(cs), FMC2_BCR_MBKEN, 0);  in stm32_fmc2_ebi_disable_bank()
945 static void stm32_fmc2_ebi_save_setup(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_save_setup()  argument
950 		regmap_read(ebi->regmap, FMC2_BCR(cs), &ebi->bcr[cs]);  in stm32_fmc2_ebi_save_setup()
951 		regmap_read(ebi->regmap, FMC2_BTR(cs), &ebi->btr[cs]);  in stm32_fmc2_ebi_save_setup()
952 		regmap_read(ebi->regmap, FMC2_BWTR(cs), &ebi->bwtr[cs]);  in stm32_fmc2_ebi_save_setup()
955 	regmap_read(ebi->regmap, FMC2_PCSCNTR, &ebi->pcscntr);  in stm32_fmc2_ebi_save_setup()
958 static void stm32_fmc2_ebi_set_setup(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_set_setup()  argument
963 		regmap_write(ebi->regmap, FMC2_BCR(cs), ebi->bcr[cs]);  in stm32_fmc2_ebi_set_setup()
964 		regmap_write(ebi->regmap, FMC2_BTR(cs), ebi->btr[cs]);  in stm32_fmc2_ebi_set_setup()
965 		regmap_write(ebi->regmap, FMC2_BWTR(cs), ebi->bwtr[cs]);  in stm32_fmc2_ebi_set_setup()
968 	regmap_write(ebi->regmap, FMC2_PCSCNTR, ebi->pcscntr);  in stm32_fmc2_ebi_set_setup()
971 static void stm32_fmc2_ebi_disable_banks(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_disable_banks()  argument
976 		if (!(ebi->bank_assigned & BIT(cs)))  in stm32_fmc2_ebi_disable_banks()
979 		stm32_fmc2_ebi_disable_bank(ebi, cs);  in stm32_fmc2_ebi_disable_banks()
983 /* NWAIT signal can not be connected to EBI controller and NAND controller */
984 static bool stm32_fmc2_ebi_nwait_used_by_ctrls(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_nwait_used_by_ctrls()  argument
990 		if (!(ebi->bank_assigned & BIT(cs)))  in stm32_fmc2_ebi_nwait_used_by_ctrls()
993 		regmap_read(ebi->regmap, FMC2_BCR(cs), &bcr);  in stm32_fmc2_ebi_nwait_used_by_ctrls()
995 		    ebi->bank_assigned & BIT(FMC2_NAND))  in stm32_fmc2_ebi_nwait_used_by_ctrls()
1002 static void stm32_fmc2_ebi_enable(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_enable()  argument
1004 	regmap_update_bits(ebi->regmap, FMC2_BCR1,  in stm32_fmc2_ebi_enable()
1008 static void stm32_fmc2_ebi_disable(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_disable()  argument
1010 	regmap_update_bits(ebi->regmap, FMC2_BCR1, FMC2_BCR1_FMC2EN, 0);  in stm32_fmc2_ebi_disable()
1013 static int stm32_fmc2_ebi_setup_cs(struct stm32_fmc2_ebi *ebi,  in stm32_fmc2_ebi_setup_cs()  argument
1020 	stm32_fmc2_ebi_disable_bank(ebi, cs);  in stm32_fmc2_ebi_setup_cs()
1025 		ret = stm32_fmc2_ebi_parse_prop(ebi, dev_node, p, cs);  in stm32_fmc2_ebi_setup_cs()
1027 			dev_err(ebi->dev, "property %s could not be set: %d\n",  in stm32_fmc2_ebi_setup_cs()
1033 	stm32_fmc2_ebi_enable_bank(ebi, cs);  in stm32_fmc2_ebi_setup_cs()
1038 static int stm32_fmc2_ebi_parse_dt(struct stm32_fmc2_ebi *ebi)  in stm32_fmc2_ebi_parse_dt()  argument
1040 	struct device *dev = ebi->dev;  in stm32_fmc2_ebi_parse_dt()
1061 		if (ebi->bank_assigned & BIT(bank)) {  in stm32_fmc2_ebi_parse_dt()
1068 			ret = stm32_fmc2_ebi_setup_cs(ebi, child, bank);  in stm32_fmc2_ebi_parse_dt()
1077 		ebi->bank_assigned |= BIT(bank);  in stm32_fmc2_ebi_parse_dt()
1086 	if (stm32_fmc2_ebi_nwait_used_by_ctrls(ebi)) {  in stm32_fmc2_ebi_parse_dt()
1087 		dev_err(dev, "NWAIT signal connected to EBI and NAND controllers\n");  in stm32_fmc2_ebi_parse_dt()
1091 	stm32_fmc2_ebi_enable(ebi);  in stm32_fmc2_ebi_parse_dt()
1099 	struct stm32_fmc2_ebi *ebi;  in stm32_fmc2_ebi_probe()  local
1103 	ebi = devm_kzalloc(&pdev->dev, sizeof(*ebi), GFP_KERNEL);  in stm32_fmc2_ebi_probe()
1104 	if (!ebi)  in stm32_fmc2_ebi_probe()
1107 	ebi->dev = dev;  in stm32_fmc2_ebi_probe()
1109 	ebi->regmap = device_node_to_regmap(dev->of_node);  in stm32_fmc2_ebi_probe()
1110 	if (IS_ERR(ebi->regmap))  in stm32_fmc2_ebi_probe()
1111 		return PTR_ERR(ebi->regmap);  in stm32_fmc2_ebi_probe()
1113 	ebi->clk = devm_clk_get(dev, NULL);  in stm32_fmc2_ebi_probe()
1114 	if (IS_ERR(ebi->clk))  in stm32_fmc2_ebi_probe()
1115 		return PTR_ERR(ebi->clk);  in stm32_fmc2_ebi_probe()
1121 	ret = clk_prepare_enable(ebi->clk);  in stm32_fmc2_ebi_probe()
1130 	ret = stm32_fmc2_ebi_parse_dt(ebi);  in stm32_fmc2_ebi_probe()
1134 	stm32_fmc2_ebi_save_setup(ebi);  in stm32_fmc2_ebi_probe()
1135 	platform_set_drvdata(pdev, ebi);  in stm32_fmc2_ebi_probe()
1140 	stm32_fmc2_ebi_disable_banks(ebi);  in stm32_fmc2_ebi_probe()
1141 	stm32_fmc2_ebi_disable(ebi);  in stm32_fmc2_ebi_probe()
1142 	clk_disable_unprepare(ebi->clk);  in stm32_fmc2_ebi_probe()
1149 	struct stm32_fmc2_ebi *ebi = platform_get_drvdata(pdev);  in stm32_fmc2_ebi_remove()  local
1152 	stm32_fmc2_ebi_disable_banks(ebi);  in stm32_fmc2_ebi_remove()
1153 	stm32_fmc2_ebi_disable(ebi);  in stm32_fmc2_ebi_remove()
1154 	clk_disable_unprepare(ebi->clk);  in stm32_fmc2_ebi_remove()
1161 	struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev);  in stm32_fmc2_ebi_suspend()  local
1163 	stm32_fmc2_ebi_disable(ebi);  in stm32_fmc2_ebi_suspend()
1164 	clk_disable_unprepare(ebi->clk);  in stm32_fmc2_ebi_suspend()
1172 	struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev);  in stm32_fmc2_ebi_resume()  local
1177 	ret = clk_prepare_enable(ebi->clk);  in stm32_fmc2_ebi_resume()
1181 	stm32_fmc2_ebi_set_setup(ebi);  in stm32_fmc2_ebi_resume()
1182 	stm32_fmc2_ebi_enable(ebi);  in stm32_fmc2_ebi_resume()
1191 	{.compatible = "st,stm32mp1-fmc2-ebi"},
1209 MODULE_DESCRIPTION("STMicroelectronics STM32 FMC2 ebi driver");