mmc/host/sdhci-cadence.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
16 #include "sdhci-pltfm.h"
18 /* HRS - Host Register Set (specific to Cadence) */
19 #define SDHCI_CDNS_HRS04		0x10		/* PHY access port */
38 /* SRS - Slot Register Set (SDHCI-compatible) */
41 /* PHY */
56  * The tuned val register is 6 bit-wide, but not the whole of the range is
57  * available.  The range 0-42 seems to be available (then 43 wraps around to 0)
80 	{ "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, },
81 	{ "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, },
82 	{ "cdns,phy-input-delay-sd-uhs-sdr12", SDHCI_CDNS_PHY_DLY_UHS_SDR12, },
83 	{ "cdns,phy-input-delay-sd-uhs-sdr25", SDHCI_CDNS_PHY_DLY_UHS_SDR25, },
84 	{ "cdns,phy-input-delay-sd-uhs-sdr50", SDHCI_CDNS_PHY_DLY_UHS_SDR50, },
85 	{ "cdns,phy-input-delay-sd-uhs-ddr50", SDHCI_CDNS_PHY_DLY_UHS_DDR50, },
86 	{ "cdns,phy-input-delay-mmc-highspeed", SDHCI_CDNS_PHY_DLY_EMMC_SDR, },
87 	{ "cdns,phy-input-delay-mmc-ddr", SDHCI_CDNS_PHY_DLY_EMMC_DDR, },
88 	{ "cdns,phy-dll-delay-sdclk", SDHCI_CDNS_PHY_DLY_SDCLK, },
89 	{ "cdns,phy-dll-delay-sdclk-hsmmc", SDHCI_CDNS_PHY_DLY_HSMMC, },
90 	{ "cdns,phy-dll-delay-strobe", SDHCI_CDNS_PHY_DLY_STROBE, },
96 	void __iomem *reg = priv->hrs_addr + SDHCI_CDNS_HRS04;  in sdhci_cdns_write_phy_reg()
140 	struct sdhci_cdns_phy_param *p = priv->phy_params;  in sdhci_cdns_phy_param_parse()
150 		p->addr = sdhci_cdns_phy_cfgs[i].addr;  in sdhci_cdns_phy_param_parse()
151 		p->data = val;  in sdhci_cdns_phy_param_parse()
160 	for (i = 0; i < priv->nr_phy_params; i++) {  in sdhci_cdns_phy_init()
161 		ret = sdhci_cdns_write_phy_reg(priv, priv->phy_params[i].addr,  in sdhci_cdns_phy_init()
162 					       priv->phy_params[i].data);  in sdhci_cdns_phy_init()
183 	return host->max_clk;  in sdhci_cdns_get_timeout_clock()
191 	tmp = readl(priv->hrs_addr + SDHCI_CDNS_HRS06);  in sdhci_cdns_set_emmc_mode()
194 	writel(tmp, priv->hrs_addr + SDHCI_CDNS_HRS06);  in sdhci_cdns_set_emmc_mode()
201 	tmp = readl(priv->hrs_addr + SDHCI_CDNS_HRS06);  in sdhci_cdns_get_emmc_mode()
208 	void __iomem *reg = priv->hrs_addr + SDHCI_CDNS_HRS06;  in sdhci_cdns_set_tune_val()
213 		return -EINVAL;  in sdhci_cdns_set_tune_val()
221 	 * The IP6116 SD/eMMC PHY design has a timing issue on receive data  in sdhci_cdns_set_tune_val()
251 	 * The delay is set by probe, based on the DT properties.  in sdhci_cdns_execute_tuning()
253 	if (host->timing != MMC_TIMING_MMC_HS200 &&  in sdhci_cdns_execute_tuning()
254 	    host->timing != MMC_TIMING_UHS_SDR104)  in sdhci_cdns_execute_tuning()
259 		    mmc_send_tuning(host->mmc, opcode, NULL)) { /* bad */  in sdhci_cdns_execute_tuning()
271 		dev_err(mmc_dev(host->mmc), "no tuning point found\n");  in sdhci_cdns_execute_tuning()
272 		return -EIO;  in sdhci_cdns_execute_tuning()
275 	return sdhci_cdns_set_tune_val(host, end_of_streak - max_streak / 2);  in sdhci_cdns_execute_tuning()
295 		if (priv->enhanced_strobe)  in sdhci_cdns_set_uhs_signaling()
337 	priv->enhanced_strobe = ios->enhanced_strobe;  in sdhci_cdns_hs400_enhanced_strobe()
341 	if (mode == SDHCI_CDNS_HRS06_MODE_MMC_HS400 && ios->enhanced_strobe)  in sdhci_cdns_hs400_enhanced_strobe()
345 	if (mode == SDHCI_CDNS_HRS06_MODE_MMC_HS400ES && !ios->enhanced_strobe)  in sdhci_cdns_hs400_enhanced_strobe()
359 	struct device *dev = &pdev->dev;  in sdhci_cdns_probe()
374 	nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node);  in sdhci_cdns_probe()
383 	pltfm_host->clk = clk;  in sdhci_cdns_probe()
386 	priv->nr_phy_params = nr_phy_params;  in sdhci_cdns_probe()
387 	priv->hrs_addr = host->ioaddr;  in sdhci_cdns_probe()
388 	priv->enhanced_strobe = false;  in sdhci_cdns_probe()
389 	host->ioaddr += SDHCI_CDNS_SRS_BASE;  in sdhci_cdns_probe()
390 	host->mmc_host_ops.hs400_enhanced_strobe =  in sdhci_cdns_probe()
397 	ret = mmc_of_parse(host->mmc);  in sdhci_cdns_probe()
401 	sdhci_cdns_phy_param_parse(dev->of_node, priv);  in sdhci_cdns_probe()
428 	ret = clk_prepare_enable(pltfm_host->clk);  in sdhci_cdns_resume()
443 	clk_disable_unprepare(pltfm_host->clk);  in sdhci_cdns_resume()
455 		.compatible = "socionext,uniphier-sd4hc",
465 		.name = "sdhci-cdns",