1 // SPDX-License-Identifier: GPL-2.0-only
3  * sdhci-pltfm.c Support for SDHCI platform devices
16  * Inspired by sdhci-pci.c, by Pierre Ossman
26 #include "sdhci-pltfm.h"
28 unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)  in sdhci_pltfm_clk_get_max_clock()  argument
30 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in sdhci_pltfm_clk_get_max_clock()
32 	return clk_get_rate(pltfm_host->clk);  in sdhci_pltfm_clk_get_max_clock()
45 	if (device_property_present(dev, "sdhci,wp-inverted") ||  in sdhci_wp_inverted()
46 	    device_property_present(dev, "wp-inverted"))  in sdhci_wp_inverted()
49 	/* Old device trees don't have the wp-inverted property. */  in sdhci_wp_inverted()
60 	struct sdhci_host *host = platform_get_drvdata(pdev);  in sdhci_get_compatibility()  local
61 	struct device_node *np = pdev->dev.of_node;  in sdhci_get_compatibility()
66 	if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))  in sdhci_get_compatibility()
67 		host->quirks |= SDHCI_QUIRK_BROKEN_DMA;  in sdhci_get_compatibility()
69 	if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||  in sdhci_get_compatibility()
70 	    of_device_is_compatible(np, "fsl,p1010-esdhc") ||  in sdhci_get_compatibility()
71 	    of_device_is_compatible(np, "fsl,t4240-esdhc") ||  in sdhci_get_compatibility()
72 	    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))  in sdhci_get_compatibility()
73 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;  in sdhci_get_compatibility()
81 	struct device *dev = &pdev->dev;  in sdhci_get_property()
82 	struct sdhci_host *host = platform_get_drvdata(pdev);  in sdhci_get_property()  local
83 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in sdhci_get_property()
86 	if (device_property_present(dev, "sdhci,auto-cmd12"))  in sdhci_get_property()
87 		host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;  in sdhci_get_property()
89 	if (device_property_present(dev, "sdhci,1-bit-only") ||  in sdhci_get_property()
90 	    (device_property_read_u32(dev, "bus-width", &bus_width) == 0 &&  in sdhci_get_property()
92 		host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;  in sdhci_get_property()
95 		host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;  in sdhci_get_property()
97 	if (device_property_present(dev, "broken-cd"))  in sdhci_get_property()
98 		host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;  in sdhci_get_property()
100 	if (device_property_present(dev, "no-1-8-v"))  in sdhci_get_property()
101 		host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;  in sdhci_get_property()
105 	device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock);  in sdhci_get_property()
107 	if (device_property_present(dev, "keep-power-in-suspend"))  in sdhci_get_property()
108 		host->mmc->pm_caps |= MMC_PM_KEEP_POWER;  in sdhci_get_property()
110 	if (device_property_read_bool(dev, "wakeup-source") ||  in sdhci_get_property()
111 	    device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */  in sdhci_get_property()
112 		host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;  in sdhci_get_property()
120 	struct sdhci_host *host;  in sdhci_pltfm_init()  local
136 	host = sdhci_alloc_host(&pdev->dev,  in sdhci_pltfm_init()
139 	if (IS_ERR(host)) {  in sdhci_pltfm_init()
140 		ret = PTR_ERR(host);  in sdhci_pltfm_init()
144 	host->ioaddr = ioaddr;  in sdhci_pltfm_init()
145 	host->irq = irq;  in sdhci_pltfm_init()
146 	host->hw_name = dev_name(&pdev->dev);  in sdhci_pltfm_init()
147 	if (pdata && pdata->ops)  in sdhci_pltfm_init()
148 		host->ops = pdata->ops;  in sdhci_pltfm_init()
150 		host->ops = &sdhci_pltfm_ops;  in sdhci_pltfm_init()
152 		host->quirks = pdata->quirks;  in sdhci_pltfm_init()
153 		host->quirks2 = pdata->quirks2;  in sdhci_pltfm_init()
156 	platform_set_drvdata(pdev, host);  in sdhci_pltfm_init()
158 	return host;  in sdhci_pltfm_init()
160 	dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);  in sdhci_pltfm_init()
167 	struct sdhci_host *host = platform_get_drvdata(pdev);  in sdhci_pltfm_free()  local
169 	sdhci_free_host(host);  in sdhci_pltfm_free()
177 	struct sdhci_host *host;  in sdhci_pltfm_register()  local
180 	host = sdhci_pltfm_init(pdev, pdata, priv_size);  in sdhci_pltfm_register()
181 	if (IS_ERR(host))  in sdhci_pltfm_register()
182 		return PTR_ERR(host);  in sdhci_pltfm_register()
186 	ret = sdhci_add_host(host);  in sdhci_pltfm_register()
196 	struct sdhci_host *host = platform_get_drvdata(pdev);  in sdhci_pltfm_unregister()  local
197 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in sdhci_pltfm_unregister()
198 	int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);  in sdhci_pltfm_unregister()
200 	sdhci_remove_host(host, dead);  in sdhci_pltfm_unregister()
201 	clk_disable_unprepare(pltfm_host->clk);  in sdhci_pltfm_unregister()
211 	struct sdhci_host *host = dev_get_drvdata(dev);  in sdhci_pltfm_suspend()  local
212 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in sdhci_pltfm_suspend()
215 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)  in sdhci_pltfm_suspend()
216 		mmc_retune_needed(host->mmc);  in sdhci_pltfm_suspend()
218 	ret = sdhci_suspend_host(host);  in sdhci_pltfm_suspend()
222 	clk_disable_unprepare(pltfm_host->clk);  in sdhci_pltfm_suspend()
230 	struct sdhci_host *host = dev_get_drvdata(dev);  in sdhci_pltfm_resume()  local
231 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in sdhci_pltfm_resume()
234 	ret = clk_prepare_enable(pltfm_host->clk);  in sdhci_pltfm_resume()
238 	ret = sdhci_resume_host(host);  in sdhci_pltfm_resume()
240 		clk_disable_unprepare(pltfm_host->clk);  in sdhci_pltfm_resume()
254 	pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");  in sdhci_pltfm_drv_init()