1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/mmc/slot-gpio.h>
16 #include "sdhci-pltfm.h"
43 	struct mutex	write_lock; /* protect back to back writes */
63 			return -EFAULT;  in sdhci_bcm_kona_sd_reset()
72 	 * Back-to-Back register write needs a delay of 1ms at bootup (min 10uS)  in sdhci_bcm_kona_sd_reset()
73 	 * Back-to-Back writes to same register needs delay when SD bus clock  in sdhci_bcm_kona_sd_reset()
74 	 * is very low w.r.t AHB clock, mainly during boot-time and during card  in sdhci_bcm_kona_sd_reset()
75 	 * insert-removal.  in sdhci_bcm_kona_sd_reset()
97 	 * Back-to-Back register write needs a delay of 1ms at bootup (min 10uS)  in sdhci_bcm_kona_sd_init()
98 	 * Back-to-Back writes to same register needs delay when SD bus clock  in sdhci_bcm_kona_sd_init()
99 	 * is very low w.r.t AHB clock, mainly during boot-time and during card  in sdhci_bcm_kona_sd_init()
100 	 * insert-removal.  in sdhci_bcm_kona_sd_init()
119 	 * Back-to-Back register write needs a delay of min 10uS.  in sdhci_bcm_kona_sd_card_emulate()
120 	 * Back-to-Back writes to same register needs delay when SD bus clock  in sdhci_bcm_kona_sd_card_emulate()
121 	 * is very low w.r.t AHB clock, mainly during boot-time and during card  in sdhci_bcm_kona_sd_card_emulate()
122 	 * insert-removal.  in sdhci_bcm_kona_sd_card_emulate()
125 	mutex_lock(&kona_dev->write_lock);  in sdhci_bcm_kona_sd_card_emulate()
132 		ret = mmc_gpio_get_ro(host->mmc);  in sdhci_bcm_kona_sd_card_emulate()
143 	mutex_unlock(&kona_dev->write_lock);  in sdhci_bcm_kona_sd_card_emulate()
153 	if (mmc_gpio_get_cd(host->mmc) > 0) {  in sdhci_bcm_kona_card_event()
154 		dev_dbg(mmc_dev(host->mmc),  in sdhci_bcm_kona_card_event()
158 		dev_dbg(mmc_dev(host->mmc),  in sdhci_bcm_kona_card_event()
197 	{ .compatible = "brcm,kona-sdhci"},
198 	{ .compatible = "bcm,kona-sdhci"}, /* deprecated name */
207 	struct device *dev = &pdev->dev;  in sdhci_bcm_kona_probe()
218 	dev_dbg(dev, "%s: inited. IOADDR=%p\n", __func__, host->ioaddr);  in sdhci_bcm_kona_probe()
223 	mutex_init(&kona_dev->write_lock);  in sdhci_bcm_kona_probe()
225 	ret = mmc_of_parse(host->mmc);  in sdhci_bcm_kona_probe()
229 	if (!host->mmc->f_max) {  in sdhci_bcm_kona_probe()
230 		dev_err(&pdev->dev, "Missing max-freq for SDHCI cfg\n");  in sdhci_bcm_kona_probe()
231 		ret = -ENXIO;  in sdhci_bcm_kona_probe()
236 	pltfm_priv->clk = devm_clk_get(dev, NULL);  in sdhci_bcm_kona_probe()
237 	if (IS_ERR(pltfm_priv->clk)) {  in sdhci_bcm_kona_probe()
239 		ret = PTR_ERR(pltfm_priv->clk);  in sdhci_bcm_kona_probe()
243 	ret = clk_set_rate(pltfm_priv->clk, host->mmc->f_max);  in sdhci_bcm_kona_probe()
249 	ret = clk_prepare_enable(pltfm_priv->clk);  in sdhci_bcm_kona_probe()
255 	dev_dbg(dev, "non-removable=%c\n",  in sdhci_bcm_kona_probe()
256 		mmc_card_is_removable(host->mmc) ? 'N' : 'Y');  in sdhci_bcm_kona_probe()
258 		(mmc_gpio_get_cd(host->mmc) != -ENOSYS) ? 'Y' : 'N',  in sdhci_bcm_kona_probe()
259 		(mmc_gpio_get_ro(host->mmc) != -ENOSYS) ? 'Y' : 'N');  in sdhci_bcm_kona_probe()
261 	if (!mmc_card_is_removable(host->mmc))  in sdhci_bcm_kona_probe()
262 		host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;  in sdhci_bcm_kona_probe()
265 		(host->mmc->caps & MMC_CAP_8_BIT_DATA) ? 'Y' : 'N');  in sdhci_bcm_kona_probe()
278 	if (!mmc_card_is_removable(host->mmc)) {  in sdhci_bcm_kona_probe()
291 	if (mmc_gpio_get_cd(host->mmc) > 0)  in sdhci_bcm_kona_probe()
304 	clk_disable_unprepare(pltfm_priv->clk);  in sdhci_bcm_kona_probe()
309 	dev_err(dev, "Probing of sdhci-pltfm failed: %d\n", ret);  in sdhci_bcm_kona_probe()
317 	struct clk *clk = pltfm_host->clk;  in sdhci_bcm_kona_remove()
325 		.name	= "sdhci-kona",