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