mmc/host/sdhci-bcm-kona.c

9 #include <linux/mmc/host.h>
47 static int sdhci_bcm_kona_sd_reset(struct sdhci_host *host)
55 	/* reset the host using the top level reset */
56 	val = sdhci_readl(host, KONA_SDHOST_CORECTRL);
58 	sdhci_writel(host, val, KONA_SDHOST_CORECTRL);
60 	while (!(sdhci_readl(host, KONA_SDHOST_CORECTRL) & KONA_SDHOST_RESET)) {
62 			pr_err("Error: sd host is stuck in reset!!!\n");
67 	/* bring the host out of reset */
68 	val = sdhci_readl(host, KONA_SDHOST_CORECTRL);
78 	sdhci_writel(host, val, KONA_SDHOST_CORECTRL);
83 static void sdhci_bcm_kona_sd_init(struct sdhci_host *host)
88 	val = sdhci_readl(host, KONA_SDHOST_COREIMR);
90 	sdhci_writel(host, val, KONA_SDHOST_COREIMR);
92 	/* Enable the AHB clock gating module to the host */
93 	val = sdhci_readl(host, KONA_SDHOST_CORECTRL);
103 	sdhci_writel(host, val, KONA_SDHOST_CORECTRL);
112 static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert)
114 	struct sdhci_pltfm_host *pltfm_priv = sdhci_priv(host);
127 	val = sdhci_readl(host, KONA_SDHOST_CORESTAT);
132 		ret = mmc_gpio_get_ro(host->mmc);
138 		sdhci_writel(host, val, KONA_SDHOST_CORESTAT);
141 		sdhci_writel(host, val, KONA_SDHOST_CORESTAT);
151 static void sdhci_bcm_kona_card_event(struct sdhci_host *host)
153 	if (mmc_gpio_get_cd(host->mmc) > 0) {
154 		dev_dbg(mmc_dev(host->mmc),
156 		sdhci_bcm_kona_sd_card_emulate(host, 1);
158 		dev_dbg(mmc_dev(host->mmc),
160 		sdhci_bcm_kona_sd_card_emulate(host, 0);
164 static void sdhci_bcm_kona_init_74_clocks(struct sdhci_host *host,
208 	struct sdhci_host *host;
213 	host = sdhci_pltfm_init(pdev, &sdhci_pltfm_data_kona,
215 	if (IS_ERR(host))
216 		return PTR_ERR(host);
218 	dev_dbg(dev, "%s: inited. IOADDR=%p\n", __func__, host->ioaddr);
220 	pltfm_priv = sdhci_priv(host);
225 	ret = mmc_of_parse(host->mmc);
229 	if (!host->mmc->f_max) {
243 	ret = clk_set_rate(pltfm_priv->clk, host->mmc->f_max);
256 		mmc_card_is_removable(host->mmc) ? 'N' : 'Y');
258 		(mmc_gpio_get_cd(host->mmc) != -ENOSYS) ? 'Y' : 'N',
259 		(mmc_gpio_get_ro(host->mmc) != -ENOSYS) ? 'Y' : 'N');
261 	if (!mmc_card_is_removable(host->mmc))
262 		host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
265 		(host->mmc->caps & MMC_CAP_8_BIT_DATA) ? 'Y' : 'N');
267 	ret = sdhci_bcm_kona_sd_reset(host);
271 	sdhci_bcm_kona_sd_init(host);
273 	ret = sdhci_add_host(host);
278 	if (!mmc_card_is_removable(host->mmc)) {
279 		ret = sdhci_bcm_kona_sd_card_emulate(host, 1);
291 	if (mmc_gpio_get_cd(host->mmc) > 0)
292 		sdhci_bcm_kona_sd_card_emulate(host, 1);
298 	sdhci_remove_host(host, 0);
301 	sdhci_bcm_kona_sd_reset(host);
315 	struct sdhci_host *host = platform_get_drvdata(pdev);
316 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);