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// SPDX-License-Identifier: GPL-2.0+
/*
* NPCM SDHC MMC host controller driver.
*
* Copyright (c) 2023 Nuvoton Technology corporation.
*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include "sdhci-pltfm.h"
static const struct sdhci_pltfm_data npcm7xx_sdhci_pdata = {
.quirks = SDHCI_QUIRK_DELAY_AFTER_POWER,
.quirks2 = SDHCI_QUIRK2_STOP_WITH_TC |
SDHCI_QUIRK2_NO_1_8_V,
};
static const struct sdhci_pltfm_data npcm8xx_sdhci_pdata = {
.quirks = SDHCI_QUIRK_DELAY_AFTER_POWER,
.quirks2 = SDHCI_QUIRK2_STOP_WITH_TC,
};
static int npcm_sdhci_probe(struct platform_device *pdev)
{
const struct sdhci_pltfm_data *data;
struct sdhci_pltfm_host *pltfm_host;
struct device *dev = &pdev->dev;
struct sdhci_host *host;
u32 caps;
int ret;
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
host = sdhci_pltfm_init(pdev, data, 0);
if (IS_ERR(host))
return PTR_ERR(host);
pltfm_host = sdhci_priv(host);
pltfm_host->clk = devm_clk_get_optional_enabled(dev, NULL);
if (IS_ERR(pltfm_host->clk)) {
ret = PTR_ERR(pltfm_host->clk);
goto err_sdhci;
}
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
if (caps & SDHCI_CAN_DO_8BIT)
host->mmc->caps |= MMC_CAP_8_BIT_DATA;
ret = mmc_of_parse(host->mmc);
if (ret)
goto err_sdhci;
ret = sdhci_add_host(host);
if (ret)
goto err_sdhci;
return 0;
err_sdhci:
sdhci_pltfm_free(pdev);
return ret;
}
static const struct of_device_id npcm_sdhci_of_match[] = {
{ .compatible = "nuvoton,npcm750-sdhci", .data = &npcm7xx_sdhci_pdata },
{ .compatible = "nuvoton,npcm845-sdhci", .data = &npcm8xx_sdhci_pdata },
{ }
};
MODULE_DEVICE_TABLE(of, npcm_sdhci_of_match);
static struct platform_driver npcm_sdhci_driver = {
.driver = {
.name = "npcm-sdhci",
.of_match_table = npcm_sdhci_of_match,
.pm = &sdhci_pltfm_pmops,
},
.probe = npcm_sdhci_probe,
.remove_new = sdhci_pltfm_remove,
};
module_platform_driver(npcm_sdhci_driver);
MODULE_DESCRIPTION("NPCM Secure Digital Host Controller Interface driver");
MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");
MODULE_LICENSE("GPL");
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