1 // SPDX-License-Identifier: GPL-2.0-only
3 * sdhci-pltfm.c Support for SDHCI platform devices
4 * Copyright (c) 2009 Intel Corporation
6 * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
7 * Copyright (c) 2009 MontaVista Software, Inc.
9 * Authors: Xiaobo Xie <X.Xie@freescale.com>
10 * Anton Vorontsov <avorontsov@ru.mvista.com>
14 * SDHCI platform devices
16 * Inspired by sdhci-pci.c, by Pierre Ossman
19 #include <linux/err.h>
20 #include <linux/module.h>
21 #include <linux/property.h>
24 #include <asm/machdep.h>
26 #include "sdhci-pltfm.h"
28 unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
30 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
32 return clk_get_rate(pltfm_host->clk);
34 EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
36 static const struct sdhci_ops sdhci_pltfm_ops = {
37 .set_clock = sdhci_set_clock,
38 .set_bus_width = sdhci_set_bus_width,
40 .set_uhs_signaling = sdhci_set_uhs_signaling,
43 static bool sdhci_wp_inverted(struct device *dev)
45 if (device_property_present(dev, "sdhci,wp-inverted") ||
46 device_property_present(dev, "wp-inverted"))
49 /* Old device trees don't have the wp-inverted property. */
51 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
54 #endif /* CONFIG_PPC */
58 static void sdhci_get_compatibility(struct platform_device *pdev)
60 struct sdhci_host *host = platform_get_drvdata(pdev);
61 struct device_node *np = pdev->dev.of_node;
66 if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
67 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
69 if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
70 of_device_is_compatible(np, "fsl,p1010-esdhc") ||
71 of_device_is_compatible(np, "fsl,t4240-esdhc") ||
72 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
73 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
76 void sdhci_get_compatibility(struct platform_device *pdev) {}
77 #endif /* CONFIG_OF */
79 void sdhci_get_property(struct platform_device *pdev)
81 struct device *dev = &pdev->dev;
82 struct sdhci_host *host = platform_get_drvdata(pdev);
83 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
86 if (device_property_present(dev, "sdhci,auto-cmd12"))
87 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
89 if (device_property_present(dev, "sdhci,1-bit-only") ||
90 (device_property_read_u32(dev, "bus-width", &bus_width) == 0 &&
92 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
94 if (sdhci_wp_inverted(dev))
95 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
97 if (device_property_present(dev, "broken-cd"))
98 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
100 if (device_property_present(dev, "no-1-8-v"))
101 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
103 sdhci_get_compatibility(pdev);
105 device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock);
107 if (device_property_present(dev, "keep-power-in-suspend"))
108 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
110 if (device_property_read_bool(dev, "wakeup-source") ||
111 device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
112 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
114 EXPORT_SYMBOL_GPL(sdhci_get_property);
116 struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
117 const struct sdhci_pltfm_data *pdata,
120 struct sdhci_host *host;
121 struct resource *iomem;
122 void __iomem *ioaddr;
125 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
126 ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
127 if (IS_ERR(ioaddr)) {
128 ret = PTR_ERR(ioaddr);
132 irq = platform_get_irq(pdev, 0);
134 dev_err(&pdev->dev, "failed to get IRQ number\n");
139 host = sdhci_alloc_host(&pdev->dev,
140 sizeof(struct sdhci_pltfm_host) + priv_size);
147 host->ioaddr = ioaddr;
149 host->hw_name = dev_name(&pdev->dev);
150 if (pdata && pdata->ops)
151 host->ops = pdata->ops;
153 host->ops = &sdhci_pltfm_ops;
155 host->quirks = pdata->quirks;
156 host->quirks2 = pdata->quirks2;
159 platform_set_drvdata(pdev, host);
163 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
166 EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
168 void sdhci_pltfm_free(struct platform_device *pdev)
170 struct sdhci_host *host = platform_get_drvdata(pdev);
172 sdhci_free_host(host);
174 EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
176 int sdhci_pltfm_register(struct platform_device *pdev,
177 const struct sdhci_pltfm_data *pdata,
180 struct sdhci_host *host;
183 host = sdhci_pltfm_init(pdev, pdata, priv_size);
185 return PTR_ERR(host);
187 sdhci_get_property(pdev);
189 ret = sdhci_add_host(host);
191 sdhci_pltfm_free(pdev);
195 EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
197 int sdhci_pltfm_unregister(struct platform_device *pdev)
199 struct sdhci_host *host = platform_get_drvdata(pdev);
200 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
201 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
203 sdhci_remove_host(host, dead);
204 clk_disable_unprepare(pltfm_host->clk);
205 sdhci_pltfm_free(pdev);
209 EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
211 #ifdef CONFIG_PM_SLEEP
212 int sdhci_pltfm_suspend(struct device *dev)
214 struct sdhci_host *host = dev_get_drvdata(dev);
215 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
218 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
219 mmc_retune_needed(host->mmc);
221 ret = sdhci_suspend_host(host);
225 clk_disable_unprepare(pltfm_host->clk);
229 EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
231 int sdhci_pltfm_resume(struct device *dev)
233 struct sdhci_host *host = dev_get_drvdata(dev);
234 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
237 ret = clk_prepare_enable(pltfm_host->clk);
241 ret = sdhci_resume_host(host);
243 clk_disable_unprepare(pltfm_host->clk);
247 EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
250 const struct dev_pm_ops sdhci_pltfm_pmops = {
251 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
253 EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
255 static int __init sdhci_pltfm_drv_init(void)
257 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
261 module_init(sdhci_pltfm_drv_init);
263 static void __exit sdhci_pltfm_drv_exit(void)
266 module_exit(sdhci_pltfm_drv_exit);
268 MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
269 MODULE_AUTHOR("Intel Corporation");
270 MODULE_LICENSE("GPL v2");