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