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Message-ID: <20231002194138.125349-3-tmaimon77@gmail.com> Date: Mon, 2 Oct 2023 22:41:38 +0300 From: Tomer Maimon <tmaimon77@...il.com> To: <ulf.hansson@...aro.org>, <avifishman70@...il.com>, <tali.perry1@...il.com>, <joel@....id.au>, <venture@...gle.com>, <yuenn@...gle.com>, <benjaminfair@...gle.com>, <adrian.hunter@...el.com>, <skhan@...uxfoundation.org>, <davidgow@...gle.com>, <pbrobinson@...il.com>, <gsomlo@...il.com>, <briannorris@...omium.org>, <arnd@...db.de>, <krakoczy@...micro.com>, <andy.shevchenko@...il.com> CC: <openbmc@...ts.ozlabs.org>, <linux-mmc@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Tomer Maimon <tmaimon77@...il.com> Subject: [PATCH v4 2/2] mmc: sdhci-npcm: Add NPCM SDHCI driver Add Nuvoton NPCM BMC sdhci-pltfm controller driver. Signed-off-by: Tomer Maimon <tmaimon77@...il.com> Acked-by: Adrian Hunter <adrian.hunter@...el.com> --- drivers/mmc/host/Kconfig | 8 +++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-npcm.c | 96 +++++++++++++++++++++++++++++++++++ 3 files changed, 105 insertions(+) create mode 100644 drivers/mmc/host/sdhci-npcm.c diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 554e67103c1a..3999d4fddc73 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -429,6 +429,14 @@ config MMC_SDHCI_IPROC If unsure, say N. +config MMC_SDHCI_NPCM + tristate "Secure Digital Host Controller Interface support for NPCM" + depends on ARCH_NPCM || COMPILE_TEST + depends on MMC_SDHCI_PLTFM + help + This provides support for the SD/eMMC controller found in + NPCM BMC family SoCs. + config MMC_MESON_GX tristate "Amlogic S905/GX*/AXG SD/MMC Host Controller support" depends on ARCH_MESON|| COMPILE_TEST diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index a693fa3d3f1c..d0be4465f3ec 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o obj-$(CONFIG_MMC_SDHCI_OF_SPARX5) += sdhci-of-sparx5.o obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o +obj-$(CONFIG_MMC_SDHCI_NPCM) += sdhci-npcm.o obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o diff --git a/drivers/mmc/host/sdhci-npcm.c b/drivers/mmc/host/sdhci-npcm.c new file mode 100644 index 000000000000..73bf6f3fbcc0 --- /dev/null +++ b/drivers/mmc/host/sdhci-npcm.c @@ -0,0 +1,96 @@ +// 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_clk; + + ret = sdhci_add_host(host); + if (ret) + goto err_sdhci_clk; + + return 0; + +err_sdhci_clk: + clk_disable_unprepare(pltfm_host->clk); +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@...oton.com>"); +MODULE_LICENSE("GPL"); -- 2.33.0
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