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1// SPDX-License-Identifier: GPL-2.0+2/*3 * NPCM SDHC MMC host controller driver.4 *5 * Copyright (c) 2023 Nuvoton Technology corporation.6 */7 8#include <linux/clk.h>9#include <linux/err.h>10#include <linux/io.h>11#include <linux/mmc/host.h>12#include <linux/mmc/mmc.h>13#include <linux/mod_devicetable.h>14#include <linux/module.h>15#include <linux/of.h>16 17#include "sdhci-pltfm.h"18 19static const struct sdhci_pltfm_data npcm7xx_sdhci_pdata = {20 .quirks = SDHCI_QUIRK_DELAY_AFTER_POWER,21 .quirks2 = SDHCI_QUIRK2_STOP_WITH_TC |22 SDHCI_QUIRK2_NO_1_8_V,23};24 25static const struct sdhci_pltfm_data npcm8xx_sdhci_pdata = {26 .quirks = SDHCI_QUIRK_DELAY_AFTER_POWER,27 .quirks2 = SDHCI_QUIRK2_STOP_WITH_TC,28};29 30static int npcm_sdhci_probe(struct platform_device *pdev)31{32 const struct sdhci_pltfm_data *data;33 struct sdhci_pltfm_host *pltfm_host;34 struct device *dev = &pdev->dev;35 struct sdhci_host *host;36 u32 caps;37 int ret;38 39 data = of_device_get_match_data(dev);40 if (!data)41 return -EINVAL;42 43 host = sdhci_pltfm_init(pdev, data, 0);44 if (IS_ERR(host))45 return PTR_ERR(host);46 47 pltfm_host = sdhci_priv(host);48 49 pltfm_host->clk = devm_clk_get_optional_enabled(dev, NULL);50 if (IS_ERR(pltfm_host->clk)) {51 ret = PTR_ERR(pltfm_host->clk);52 goto err_sdhci;53 }54 55 caps = sdhci_readl(host, SDHCI_CAPABILITIES);56 if (caps & SDHCI_CAN_DO_8BIT)57 host->mmc->caps |= MMC_CAP_8_BIT_DATA;58 59 ret = mmc_of_parse(host->mmc);60 if (ret)61 goto err_sdhci;62 63 ret = sdhci_add_host(host);64 if (ret)65 goto err_sdhci;66 67 return 0;68 69err_sdhci:70 sdhci_pltfm_free(pdev);71 return ret;72}73 74static const struct of_device_id npcm_sdhci_of_match[] = {75 { .compatible = "nuvoton,npcm750-sdhci", .data = &npcm7xx_sdhci_pdata },76 { .compatible = "nuvoton,npcm845-sdhci", .data = &npcm8xx_sdhci_pdata },77 { }78};79MODULE_DEVICE_TABLE(of, npcm_sdhci_of_match);80 81static struct platform_driver npcm_sdhci_driver = {82 .driver = {83 .name = "npcm-sdhci",84 .of_match_table = npcm_sdhci_of_match,85 .pm = &sdhci_pltfm_pmops,86 },87 .probe = npcm_sdhci_probe,88 .remove_new = sdhci_pltfm_remove,89};90module_platform_driver(npcm_sdhci_driver);91 92MODULE_DESCRIPTION("NPCM Secure Digital Host Controller Interface driver");93MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");94MODULE_LICENSE("GPL");95