1 // SPDX-License-Identifier: GPL-2.0+
5  * Author: Shan-Chun Hung <shanchun1218@gmail.com>
13 #include <linux/delay.h>
16 #include <linux/dma-mapping.h>
32 #include "sdhci-pltfm.h"
69  * If DMA addr spans 128MB boundary, we split the DMA transfer into two
77 	if (likely(!len || (ALIGN(addr, SZ_128M) == ALIGN(addr + len - 1, SZ_128M)))) {  in ma35_adma_write_desc()
82 	offset = addr & (SZ_128M - 1);  in ma35_adma_write_desc()
83 	tmplen = SZ_128M - offset;  in ma35_adma_write_desc()
87 	len -= tmplen;  in ma35_adma_write_desc()
115 	switch (ios->signal_voltage) {  in ma35_start_signal_voltage_switch()
117 		if (!IS_ERR(priv->pinctrl) && !IS_ERR(priv->pins_uhs))  in ma35_start_signal_voltage_switch()
118 			pinctrl_select_state(priv->pinctrl, priv->pins_uhs);  in ma35_start_signal_voltage_switch()
121 		if (!IS_ERR(priv->pinctrl) && !IS_ERR(priv->pins_default))  in ma35_start_signal_voltage_switch()
122 			pinctrl_select_state(priv->pinctrl, priv->pins_default);  in ma35_start_signal_voltage_switch()
125 		dev_err(mmc_dev(host->mmc), "Unsupported signal voltage!\n");  in ma35_start_signal_voltage_switch()
126 		return -EINVAL;  in ma35_start_signal_voltage_switch()
160 	reset_control_assert(priv->rst);  in ma35_execute_tuning()
161 	reset_control_deassert(priv->rst);  in ma35_execute_tuning()
194 	struct device *dev = &pdev->dev;  in ma35_probe()
199 	u32 extra, ctl;  in ma35_probe()  local
205 	/* Extra adma table cnt for cross 128M boundary handling. */  in ma35_probe()
206 	extra = DIV_ROUND_UP_ULL(dma_get_required_mask(dev), SZ_128M);  in ma35_probe()
207 	extra = min(extra, SDHCI_MAX_SEGS);  in ma35_probe()
209 	host->adma_table_cnt += extra;  in ma35_probe()
213 	pltfm_host->clk = devm_clk_get_optional_enabled(dev, NULL);  in ma35_probe()
214 	if (IS_ERR(pltfm_host->clk)) {  in ma35_probe()
215 		err = dev_err_probe(dev, PTR_ERR(pltfm_host->clk), "failed to get clk\n");  in ma35_probe()
219 	err = mmc_of_parse(host->mmc);  in ma35_probe()
223 	priv->rst = devm_reset_control_get_exclusive(dev, NULL);  in ma35_probe()
224 	if (IS_ERR(priv->rst)) {  in ma35_probe()
225 		err = dev_err_probe(dev, PTR_ERR(priv->rst), "failed to get reset control\n");  in ma35_probe()
231 	priv->pinctrl = devm_pinctrl_get(dev);  in ma35_probe()
232 	if (!IS_ERR(priv->pinctrl)) {  in ma35_probe()
233 		priv->pins_default = pinctrl_lookup_state(priv->pinctrl, "default");  in ma35_probe()
234 		priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl, "state_uhs");  in ma35_probe()
235 		pinctrl_select_state(priv->pinctrl, priv->pins_default);  in ma35_probe()
238 	if (!(host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)) {  in ma35_probe()
250 		host->mmc_host_ops.start_signal_voltage_switch =  in ma35_probe()
254 	host->mmc_host_ops.execute_tuning = ma35_execute_tuning;  in ma35_probe()
298 	{ .compatible = "nuvoton,ma35d1-sdhci" },
304 		.name	= "sdhci-ma35",
313 MODULE_AUTHOR("Shan-Chun Hung <shanchun1218@gmail.com>");