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267 lines
6.4 KiB
267 lines
6.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* sdhci-pltfm.c Support for SDHCI platform devices |
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* Copyright (c) 2009 Intel Corporation |
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* |
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* Copyright (c) 2007, 2011 Freescale Semiconductor, Inc. |
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* Copyright (c) 2009 MontaVista Software, Inc. |
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* |
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* Authors: Xiaobo Xie <[email protected]> |
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* Anton Vorontsov <[email protected]> |
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*/ |
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/* Supports: |
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* SDHCI platform devices |
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* |
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* Inspired by sdhci-pci.c, by Pierre Ossman |
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*/ |
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#include <linux/err.h> |
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#include <linux/module.h> |
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#include <linux/property.h> |
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#include <linux/of.h> |
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#ifdef CONFIG_PPC |
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#include <asm/machdep.h> |
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#endif |
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#include "sdhci-pltfm.h" |
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unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host) |
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{ |
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
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return clk_get_rate(pltfm_host->clk); |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock); |
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static const struct sdhci_ops sdhci_pltfm_ops = { |
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.set_clock = sdhci_set_clock, |
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.set_bus_width = sdhci_set_bus_width, |
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.reset = sdhci_reset, |
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.set_uhs_signaling = sdhci_set_uhs_signaling, |
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}; |
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static bool sdhci_wp_inverted(struct device *dev) |
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{ |
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if (device_property_present(dev, "sdhci,wp-inverted") || |
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device_property_present(dev, "wp-inverted")) |
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return true; |
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/* Old device trees don't have the wp-inverted property. */ |
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#ifdef CONFIG_PPC |
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return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds); |
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#else |
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return false; |
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#endif /* CONFIG_PPC */ |
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} |
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#ifdef CONFIG_OF |
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static void sdhci_get_compatibility(struct platform_device *pdev) |
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{ |
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struct sdhci_host *host = platform_get_drvdata(pdev); |
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struct device_node *np = pdev->dev.of_node; |
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if (!np) |
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return; |
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if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc")) |
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host->quirks |= SDHCI_QUIRK_BROKEN_DMA; |
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if (of_device_is_compatible(np, "fsl,p2020-esdhc") || |
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of_device_is_compatible(np, "fsl,p1010-esdhc") || |
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of_device_is_compatible(np, "fsl,t4240-esdhc") || |
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of_device_is_compatible(np, "fsl,mpc8536-esdhc")) |
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host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; |
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} |
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#else |
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void sdhci_get_compatibility(struct platform_device *pdev) {} |
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#endif /* CONFIG_OF */ |
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void sdhci_get_property(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct sdhci_host *host = platform_get_drvdata(pdev); |
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
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u32 bus_width; |
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if (device_property_present(dev, "sdhci,auto-cmd12")) |
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host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; |
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if (device_property_present(dev, "sdhci,1-bit-only") || |
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(device_property_read_u32(dev, "bus-width", &bus_width) == 0 && |
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bus_width == 1)) |
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host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; |
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if (sdhci_wp_inverted(dev)) |
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host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT; |
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if (device_property_present(dev, "broken-cd")) |
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host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
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if (device_property_present(dev, "no-1-8-v")) |
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host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; |
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sdhci_get_compatibility(pdev); |
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device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock); |
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if (device_property_present(dev, "keep-power-in-suspend")) |
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host->mmc->pm_caps |= MMC_PM_KEEP_POWER; |
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if (device_property_read_bool(dev, "wakeup-source") || |
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device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */ |
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host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; |
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} |
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EXPORT_SYMBOL_GPL(sdhci_get_property); |
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struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev, |
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const struct sdhci_pltfm_data *pdata, |
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size_t priv_size) |
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{ |
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struct sdhci_host *host; |
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void __iomem *ioaddr; |
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int irq, ret; |
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ioaddr = devm_platform_ioremap_resource(pdev, 0); |
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if (IS_ERR(ioaddr)) { |
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ret = PTR_ERR(ioaddr); |
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goto err; |
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} |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) { |
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ret = irq; |
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goto err; |
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} |
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host = sdhci_alloc_host(&pdev->dev, |
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sizeof(struct sdhci_pltfm_host) + priv_size); |
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if (IS_ERR(host)) { |
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ret = PTR_ERR(host); |
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goto err; |
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} |
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host->ioaddr = ioaddr; |
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host->irq = irq; |
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host->hw_name = dev_name(&pdev->dev); |
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if (pdata && pdata->ops) |
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host->ops = pdata->ops; |
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else |
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host->ops = &sdhci_pltfm_ops; |
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if (pdata) { |
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host->quirks = pdata->quirks; |
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host->quirks2 = pdata->quirks2; |
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} |
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platform_set_drvdata(pdev, host); |
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return host; |
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err: |
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dev_err(&pdev->dev, "%s failed %d\n", __func__, ret); |
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return ERR_PTR(ret); |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_init); |
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void sdhci_pltfm_free(struct platform_device *pdev) |
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{ |
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struct sdhci_host *host = platform_get_drvdata(pdev); |
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sdhci_free_host(host); |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_free); |
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int sdhci_pltfm_register(struct platform_device *pdev, |
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const struct sdhci_pltfm_data *pdata, |
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size_t priv_size) |
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{ |
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struct sdhci_host *host; |
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int ret = 0; |
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host = sdhci_pltfm_init(pdev, pdata, priv_size); |
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if (IS_ERR(host)) |
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return PTR_ERR(host); |
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sdhci_get_property(pdev); |
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ret = sdhci_add_host(host); |
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if (ret) |
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sdhci_pltfm_free(pdev); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_register); |
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int sdhci_pltfm_unregister(struct platform_device *pdev) |
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{ |
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struct sdhci_host *host = platform_get_drvdata(pdev); |
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
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int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); |
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sdhci_remove_host(host, dead); |
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clk_disable_unprepare(pltfm_host->clk); |
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sdhci_pltfm_free(pdev); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister); |
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#ifdef CONFIG_PM_SLEEP |
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int sdhci_pltfm_suspend(struct device *dev) |
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{ |
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struct sdhci_host *host = dev_get_drvdata(dev); |
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
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int ret; |
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if (host->tuning_mode != SDHCI_TUNING_MODE_3) |
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mmc_retune_needed(host->mmc); |
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ret = sdhci_suspend_host(host); |
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if (ret) |
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return ret; |
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clk_disable_unprepare(pltfm_host->clk); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend); |
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int sdhci_pltfm_resume(struct device *dev) |
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{ |
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struct sdhci_host *host = dev_get_drvdata(dev); |
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
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int ret; |
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ret = clk_prepare_enable(pltfm_host->clk); |
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if (ret) |
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return ret; |
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ret = sdhci_resume_host(host); |
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if (ret) |
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clk_disable_unprepare(pltfm_host->clk); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_resume); |
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#endif |
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const struct dev_pm_ops sdhci_pltfm_pmops = { |
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SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume) |
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}; |
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EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops); |
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static int __init sdhci_pltfm_drv_init(void) |
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{ |
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pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n"); |
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return 0; |
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} |
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module_init(sdhci_pltfm_drv_init); |
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static void __exit sdhci_pltfm_drv_exit(void) |
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{ |
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} |
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module_exit(sdhci_pltfm_drv_exit); |
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MODULE_DESCRIPTION("SDHCI platform and OF driver helper"); |
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MODULE_AUTHOR("Intel Corporation"); |
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MODULE_LICENSE("GPL v2");
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