1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/mmc/slot-gpio.h>
22 #include "sdhci-pltfm.h"
87 /* sdhci-omap controller flags */
124 	return readl(host->base + offset);  in sdhci_omap_readl()
130 	writel(data, host->base + offset);  in sdhci_omap_writel()
137 	struct device *dev = omap_host->dev;  in sdhci_omap_set_pbias()
139 	if (IS_ERR(omap_host->pbias))  in sdhci_omap_set_pbias()
143 		ret = regulator_set_voltage(omap_host->pbias, iov, iov);  in sdhci_omap_set_pbias()
149 		if (omap_host->pbias_enabled)  in sdhci_omap_set_pbias()
152 		ret = regulator_enable(omap_host->pbias);  in sdhci_omap_set_pbias()
158 		omap_host->pbias_enabled = true;  in sdhci_omap_set_pbias()
160 		if (!omap_host->pbias_enabled)  in sdhci_omap_set_pbias()
163 		ret = regulator_disable(omap_host->pbias);  in sdhci_omap_set_pbias()
168 		omap_host->pbias_enabled = false;  in sdhci_omap_set_pbias()
178 	struct sdhci_host *host = omap_host->host;  in sdhci_omap_enable_iov()
179 	struct mmc_host *mmc = host->mmc;  in sdhci_omap_enable_iov()
185 	if (!IS_ERR(mmc->supply.vqmmc)) {  in sdhci_omap_enable_iov()
186 		ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov);  in sdhci_omap_enable_iov()
291 	struct device *dev = omap_host->dev;  in sdhci_omap_execute_tuning()
292 	struct mmc_ios *ios = &mmc->ios;  in sdhci_omap_execute_tuning()
305 	if (ios->clock <= 52000000)  in sdhci_omap_execute_tuning()
309 	if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50))  in sdhci_omap_execute_tuning()
332 	if (host->ier & SDHCI_INT_DATA_CRC) {  in sdhci_omap_execute_tuning()
333 		host->ier &= ~SDHCI_INT_DATA_CRC;  in sdhci_omap_execute_tuning()
337 	omap_host->is_tuning = true;  in sdhci_omap_execute_tuning()
373 		ret = -EIO;  in sdhci_omap_execute_tuning()
381 	if (temperature < -20000)  in sdhci_omap_execute_tuning()
382 		phase_delay = min(max_window + 4 * (max_len - 1) - 24,  in sdhci_omap_execute_tuning()
401 	 * +2 to -10 range. If found, move away from it in the appropriate  in sdhci_omap_execute_tuning()
411 				phase_delay += i - 12;  in sdhci_omap_execute_tuning()
413 				phase_delay += i - 8;  in sdhci_omap_execute_tuning()
415 				phase_delay += i - 6;  in sdhci_omap_execute_tuning()
421 	for (i = 2; i >= -10; i--) {  in sdhci_omap_execute_tuning()
443 		ret = -EIO;  in sdhci_omap_execute_tuning()
449 	omap_host->is_tuning = false;  in sdhci_omap_execute_tuning()
454 	omap_host->is_tuning = false;  in sdhci_omap_execute_tuning()
462 		host->ier |= SDHCI_INT_DATA_CRC;  in sdhci_omap_execute_tuning()
463 	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);  in sdhci_omap_execute_tuning()
464 	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);  in sdhci_omap_execute_tuning()
475 	u32 ier = host->ier;  in sdhci_omap_card_busy()
488 	disable_irq(host->irq);  in sdhci_omap_card_busy()
506 	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);  in sdhci_omap_card_busy()
507 	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);  in sdhci_omap_card_busy()
508 	enable_irq(host->irq);  in sdhci_omap_card_busy()
526 	dev = omap_host->dev;  in sdhci_omap_start_signal_voltage_switch()
528 	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {  in sdhci_omap_start_signal_voltage_switch()
531 			return -EOPNOTSUPP;  in sdhci_omap_start_signal_voltage_switch()
533 		sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage);  in sdhci_omap_start_signal_voltage_switch()
540 	} else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {  in sdhci_omap_start_signal_voltage_switch()
543 			return -EOPNOTSUPP;  in sdhci_omap_start_signal_voltage_switch()
545 		sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage);  in sdhci_omap_start_signal_voltage_switch()
553 		return -EOPNOTSUPP;  in sdhci_omap_start_signal_voltage_switch()
570 	struct device *dev = omap_host->dev;  in sdhci_omap_set_timing()
572 	if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY))  in sdhci_omap_set_timing()
575 	if (omap_host->timing == timing)  in sdhci_omap_set_timing()
580 	pinctrl_state = omap_host->pinctrl_state[timing];  in sdhci_omap_set_timing()
581 	ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state);  in sdhci_omap_set_timing()
588 	omap_host->timing = timing;  in sdhci_omap_set_timing()
594 	if (omap_host->bus_mode == MMC_POWER_OFF)  in sdhci_omap_set_power_mode()
596 	omap_host->power_mode = power_mode;  in sdhci_omap_set_power_mode()
604 	if (omap_host->bus_mode == mode)  in sdhci_omap_set_bus_mode()
614 	omap_host->bus_mode = mode;  in sdhci_omap_set_bus_mode()
626 	sdhci_omap_set_bus_mode(omap_host, ios->bus_mode);  in sdhci_omap_set_ios()
627 	sdhci_omap_set_timing(omap_host, ios->timing);  in sdhci_omap_set_ios()
629 	sdhci_omap_set_power_mode(omap_host, ios->power_mode);  in sdhci_omap_set_ios()
637 	dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock);  in sdhci_omap_calc_divisor()
683 	struct mmc_host *mmc = host->mmc;  in sdhci_omap_set_power()
685 	mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);  in sdhci_omap_set_power()
697 	if (!host->use_external_dma)  in sdhci_omap_enable_dma()
709 	return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX;  in sdhci_omap_get_min_clock()
735 	if (omap_host->power_mode == power_mode)  in sdhci_omap_init_74_clocks()
741 	disable_irq(host->irq);  in sdhci_omap_init_74_clocks()
765 	enable_irq(host->irq);  in sdhci_omap_init_74_clocks()
797 	if (omap_host->is_tuning)  in sdhci_omap_reset()
800 	if (omap_host->flags & SDHCI_OMAP_SPECIAL_RESET) {  in sdhci_omap_reset()
811 			dev_err(mmc_dev(host->mmc),  in sdhci_omap_reset()
829 	if (omap_host->is_tuning && host->cmd && !host->data_early &&  in sdhci_omap_irq()
839 			host->cmd->error = -ETIMEDOUT;  in sdhci_omap_irq()
841 			host->cmd->error = -EILSEQ;  in sdhci_omap_irq()
843 		host->cmd = NULL;  in sdhci_omap_irq()
860 	if (cmd->opcode == MMC_ERASE)  in sdhci_omap_set_timeout()
884 	struct device *dev = omap_host->dev;  in sdhci_omap_set_capabilities()
943 	{ .compatible = "ti,dra7-sdhci", .data = &dra7_data },
944 	{ .compatible = "ti,k2g-sdhci", .data = &k2g_data },
945 	{ .compatible = "ti,am335-sdhci", .data = &am335_data },
946 	{ .compatible = "ti,am437-sdhci", .data = &am437_data },
955 	struct device *dev = omap_host->dev;  in sdhci_omap_iodelay_pinctrl_state()
956 	char *version = omap_host->version;  in sdhci_omap_iodelay_pinctrl_state()
957 	struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV);  in sdhci_omap_iodelay_pinctrl_state()
964 		snprintf(str, 20, "%s-%s", mode, version);  in sdhci_omap_iodelay_pinctrl_state()
965 		pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str);  in sdhci_omap_iodelay_pinctrl_state()
969 		pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode);  in sdhci_omap_iodelay_pinctrl_state()
983 	struct device *dev = omap_host->dev;  in sdhci_omap_config_iodelay_pinctrl_state()
984 	struct sdhci_host *host = omap_host->host;  in sdhci_omap_config_iodelay_pinctrl_state()
985 	struct mmc_host *mmc = host->mmc;  in sdhci_omap_config_iodelay_pinctrl_state()
986 	u32 *caps = &mmc->caps;  in sdhci_omap_config_iodelay_pinctrl_state()
987 	u32 *caps2 = &mmc->caps2;  in sdhci_omap_config_iodelay_pinctrl_state()
991 	if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY))  in sdhci_omap_config_iodelay_pinctrl_state()
999 		return -ENOMEM;  in sdhci_omap_config_iodelay_pinctrl_state()
1001 	omap_host->pinctrl = devm_pinctrl_get(omap_host->dev);  in sdhci_omap_config_iodelay_pinctrl_state()
1002 	if (IS_ERR(omap_host->pinctrl)) {  in sdhci_omap_config_iodelay_pinctrl_state()
1004 		return PTR_ERR(omap_host->pinctrl);  in sdhci_omap_config_iodelay_pinctrl_state()
1007 	state = pinctrl_lookup_state(omap_host->pinctrl, "default");  in sdhci_omap_config_iodelay_pinctrl_state()
1066 	omap_host->pinctrl_state = pinctrl_state;  in sdhci_omap_config_iodelay_pinctrl_state()
1085 	struct device *dev = &pdev->dev;  in sdhci_omap_probe()
1097 		return -EINVAL;  in sdhci_omap_probe()
1099 	data = (struct sdhci_omap_data *)match->data;  in sdhci_omap_probe()
1102 		return -EINVAL;  in sdhci_omap_probe()
1104 	offset = data->offset;  in sdhci_omap_probe()
1108 		return -ENXIO;  in sdhci_omap_probe()
1119 	omap_host->host = host;  in sdhci_omap_probe()
1120 	omap_host->base = host->ioaddr;  in sdhci_omap_probe()
1121 	omap_host->dev = dev;  in sdhci_omap_probe()
1122 	omap_host->power_mode = MMC_POWER_UNDEFINED;  in sdhci_omap_probe()
1123 	omap_host->timing = MMC_TIMING_LEGACY;  in sdhci_omap_probe()
1124 	omap_host->flags = data->flags;  in sdhci_omap_probe()
1125 	host->ioaddr += offset;  in sdhci_omap_probe()
1126 	host->mapbase = regs->start + offset;  in sdhci_omap_probe()
1128 	mmc = host->mmc;  in sdhci_omap_probe()
1136 		omap_host->version = "rev11";  in sdhci_omap_probe()
1138 			mmc->f_max = 96000000;  in sdhci_omap_probe()
1140 			mmc->f_max = 48000000;  in sdhci_omap_probe()
1142 			mmc->f_max = 48000000;  in sdhci_omap_probe()
1146 		mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;  in sdhci_omap_probe()
1148 	pltfm_host->clk = devm_clk_get(dev, "fck");  in sdhci_omap_probe()
1149 	if (IS_ERR(pltfm_host->clk)) {  in sdhci_omap_probe()
1150 		ret = PTR_ERR(pltfm_host->clk);  in sdhci_omap_probe()
1154 	ret = clk_set_rate(pltfm_host->clk, mmc->f_max);  in sdhci_omap_probe()
1156 		dev_err(dev, "failed to set clock to %d\n", mmc->f_max);  in sdhci_omap_probe()
1160 	omap_host->pbias = devm_regulator_get_optional(dev, "pbias");  in sdhci_omap_probe()
1161 	if (IS_ERR(omap_host->pbias)) {  in sdhci_omap_probe()
1162 		ret = PTR_ERR(omap_host->pbias);  in sdhci_omap_probe()
1163 		if (ret != -ENODEV)  in sdhci_omap_probe()
1167 	omap_host->pbias_enabled = false;  in sdhci_omap_probe()
1188 	host->mmc_host_ops.start_signal_voltage_switch =  in sdhci_omap_probe()
1190 	host->mmc_host_ops.set_ios = sdhci_omap_set_ios;  in sdhci_omap_probe()
1191 	host->mmc_host_ops.card_busy = sdhci_omap_card_busy;  in sdhci_omap_probe()
1192 	host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning;  in sdhci_omap_probe()
1193 	host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq;  in sdhci_omap_probe()
1196 	if (of_find_property(dev->of_node, "dmas", NULL))  in sdhci_omap_probe()
1200 	mmc->caps |= MMC_CAP_NEED_RSP_BUSY;  in sdhci_omap_probe()
1232 	struct device *dev = &pdev->dev;  in sdhci_omap_remove()
1245 	omap_host->con = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON);  in sdhci_omap_context_save()
1246 	omap_host->hctl = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL);  in sdhci_omap_context_save()
1247 	omap_host->capa = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA);  in sdhci_omap_context_save()
1252 	sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, omap_host->con);  in sdhci_omap_context_restore()
1253 	sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, omap_host->hctl);  in sdhci_omap_context_restore()
1254 	sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, omap_host->capa);  in sdhci_omap_context_restore()
1298 		   .name = "sdhci-omap",