2 * sdhci-pltfm.c Support for SDHCI platform devices
3 * Copyright (c) 2009 Intel Corporation
5 * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
6 * Copyright (c) 2009 MontaVista Software, Inc.
8 * Authors: Xiaobo Xie <X.Xie@freescale.com>
9 * Anton Vorontsov <avorontsov@ru.mvista.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * SDHCI platform devices
28 * Inspired by sdhci-pci.c, by Pierre Ossman
31 #include <linux/err.h>
32 #include <linux/module.h>
35 #include <asm/machdep.h>
37 #include "sdhci-pltfm.h"
39 static struct sdhci_ops sdhci_pltfm_ops = {
43 static bool sdhci_of_wp_inverted(struct device_node *np)
45 if (of_get_property(np, "sdhci,wp-inverted", NULL) ||
46 of_get_property(np, "wp-inverted", NULL))
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 */
57 void sdhci_get_of_property(struct platform_device *pdev)
59 struct device_node *np = pdev->dev.of_node;
60 struct sdhci_host *host = platform_get_drvdata(pdev);
61 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
66 if (of_device_is_available(np)) {
67 if (of_get_property(np, "sdhci,auto-cmd12", NULL))
68 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
70 if (of_get_property(np, "sdhci,1-bit-only", NULL) ||
71 (of_property_read_u32(np, "bus-width", &bus_width) == 0 &&
73 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
75 if (sdhci_of_wp_inverted(np))
76 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
78 if (of_get_property(np, "broken-cd", NULL))
79 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
81 if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
82 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
84 if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
85 of_device_is_compatible(np, "fsl,p1010-esdhc") ||
86 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
87 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
89 clk = of_get_property(np, "clock-frequency", &size);
90 if (clk && size == sizeof(*clk) && *clk)
91 pltfm_host->clock = be32_to_cpup(clk);
93 if (of_find_property(np, "keep-power-in-suspend", NULL))
94 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
96 if (of_find_property(np, "enable-sdio-wakeup", NULL))
97 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
101 void sdhci_get_of_property(struct platform_device *pdev) {}
102 #endif /* CONFIG_OF */
103 EXPORT_SYMBOL_GPL(sdhci_get_of_property);
105 struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
106 struct sdhci_pltfm_data *pdata)
108 struct sdhci_host *host;
109 struct sdhci_pltfm_host *pltfm_host;
110 struct device_node *np = pdev->dev.of_node;
111 struct resource *iomem;
114 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
120 if (resource_size(iomem) < 0x100)
121 dev_err(&pdev->dev, "Invalid iomem size!\n");
123 /* Some PCI-based MFD need the parent here */
124 if (pdev->dev.parent != &platform_bus && !np)
125 host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
127 host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
134 pltfm_host = sdhci_priv(host);
136 host->hw_name = dev_name(&pdev->dev);
137 if (pdata && pdata->ops)
138 host->ops = pdata->ops;
140 host->ops = &sdhci_pltfm_ops;
142 host->quirks = pdata->quirks;
143 host->irq = platform_get_irq(pdev, 0);
145 if (!request_mem_region(iomem->start, resource_size(iomem),
146 mmc_hostname(host->mmc))) {
147 dev_err(&pdev->dev, "cannot request region\n");
152 host->ioaddr = ioremap(iomem->start, resource_size(iomem));
154 dev_err(&pdev->dev, "failed to remap registers\n");
160 * Some platforms need to probe the controller to be able to
161 * determine which caps should be used.
163 if (host->ops && host->ops->platform_init)
164 host->ops->platform_init(host);
166 platform_set_drvdata(pdev, host);
171 release_mem_region(iomem->start, resource_size(iomem));
173 sdhci_free_host(host);
175 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
178 EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
180 void sdhci_pltfm_free(struct platform_device *pdev)
182 struct sdhci_host *host = platform_get_drvdata(pdev);
183 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
185 iounmap(host->ioaddr);
186 release_mem_region(iomem->start, resource_size(iomem));
187 sdhci_free_host(host);
188 platform_set_drvdata(pdev, NULL);
190 EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
192 int sdhci_pltfm_register(struct platform_device *pdev,
193 struct sdhci_pltfm_data *pdata)
195 struct sdhci_host *host;
198 host = sdhci_pltfm_init(pdev, pdata);
200 return PTR_ERR(host);
202 sdhci_get_of_property(pdev);
204 ret = sdhci_add_host(host);
206 sdhci_pltfm_free(pdev);
210 EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
212 int sdhci_pltfm_unregister(struct platform_device *pdev)
214 struct sdhci_host *host = platform_get_drvdata(pdev);
215 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
217 sdhci_remove_host(host, dead);
218 sdhci_pltfm_free(pdev);
222 EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
225 static int sdhci_pltfm_suspend(struct device *dev)
227 struct sdhci_host *host = dev_get_drvdata(dev);
229 return sdhci_suspend_host(host);
232 static int sdhci_pltfm_resume(struct device *dev)
234 struct sdhci_host *host = dev_get_drvdata(dev);
236 return sdhci_resume_host(host);
239 const struct dev_pm_ops sdhci_pltfm_pmops = {
240 .suspend = sdhci_pltfm_suspend,
241 .resume = sdhci_pltfm_resume,
243 EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
244 #endif /* CONFIG_PM */
246 static int __init sdhci_pltfm_drv_init(void)
248 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
252 module_init(sdhci_pltfm_drv_init);
254 static void __exit sdhci_pltfm_drv_exit(void)
257 module_exit(sdhci_pltfm_drv_exit);
259 MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
260 MODULE_AUTHOR("Intel Corporation");
261 MODULE_LICENSE("GPL v2");