From patchwork Thu May 1 08:50:22 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yixun Lan X-Patchwork-Id: 886593 Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 52C2C20E01A; Thu, 1 May 2025 08:51:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=140.211.166.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746089463; cv=none; b=eNCNK+AHzEQqCYju0aFUqcRP+panX3lWRHGD9m8ICs/ryrJSmEdYfACC1C9TOrNf5D9DoiRdlpff24uUIfTToGry6+LPJNf4RtxPCgLI0yCu9qq8ZvjOsBfRwwWcfKRZ/GjAyOPounH1KYGlbAu7XgnWNL31GWw33GKopMgVikU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746089463; c=relaxed/simple; bh=MoUc69L93Wv++98FMAmd6DERA9IY0HWzb98yaw7znjs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=knjwy00zpF5pr/AfV3t2L0AWRbQZne1yE8oqh/aHioOcY/+4DzE0z9Bbqf8jCjUfie++SuuBf+75h3g+1BgDhnFtq/tPNTYwg5CoWklYx/gXABRy+Q2h1WKleNT7CAZyNUupGml2THIExYebgt8obsj6bGqEnXfC1Mu8vbki1Wg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gentoo.org; spf=pass smtp.mailfrom=gentoo.org; arc=none smtp.client-ip=140.211.166.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gentoo.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gentoo.org Received: from [127.0.0.1] (unknown [116.232.147.253]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dlan) by smtp.gentoo.org (Postfix) with ESMTPSA id 767AC342FEA; Thu, 01 May 2025 08:50:57 +0000 (UTC) From: Yixun Lan Date: Thu, 01 May 2025 16:50:22 +0800 Subject: [PATCH v2 2/2] mmc: sdhci-of-k1: add support for SpacemiT K1 SoC Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250501-20-k1-sdhci-v2-2-3e7005fae29b@gentoo.org> References: <20250501-20-k1-sdhci-v2-0-3e7005fae29b@gentoo.org> In-Reply-To: <20250501-20-k1-sdhci-v2-0-3e7005fae29b@gentoo.org> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter Cc: Alex Elder , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Yixun Lan X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=11306; i=dlan@gentoo.org; h=from:subject:message-id; bh=MoUc69L93Wv++98FMAmd6DERA9IY0HWzb98yaw7znjs=; b=owEBzQIy/ZANAwAKATGq6kdZTbvtAcsmYgBoEzXmtstJxdJPFB0o1AXSvcO2XdAP127cdx9bX +16HEAo8HyJApMEAAEKAH0WIQS1urjJwxtxFWcCI9wxqupHWU277QUCaBM15l8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0QjVCQUI4QzlDMzF CNzExNTY3MDIyM0RDMzFBQUVBNDc1OTREQkJFRAAKCRAxqupHWU277SxVD/9JomqyqwEBPMXIWg 931TRpSlvy7eEM97kO3m/HL8Zd4s2dHhqk/i3ymt2CgsrS94BUBcxn6JWLJKzs0RbDv9a946CYf sdBPcFEPIwu7Chey3JdSl3yd9qNlCQM3YY/JBQ6Y88KqqILRbvaznojCgovcNoVBJFwRezFBCU7 K/ZCW3fzQgtYGtF0qfp17vLgPFDQujxnH5OywIvQELI8bkPnDkvGisku2LMi/bkqh51D6YmIN2s BeXwva/lZ2EzgZEuu6awpkWSutt8LGuLZxWc4KuDjlGjrlcnlmcWBNaoBRlXystVdwWfLL47RCN 1jV8yot9yR3BKIzlBmhXfMGXq7av6A50A8C1gXLi9JCl9pJ0aY049Y5l1GOWaFGpftYQQVeUAip Peyo82RTlmXxZFPiEKTn6n2n+b+zHxMS70YBMdAvVlrXp/ywW2FKZZSjSZ/sjCedl9HeR7F7S1K tTBCCTVSf8WV1Wh4W1+ou3BMyCZh6skkxEZWU0wKWFVWt3f/JTF1zn3IPBOdRdf192yoTIqlUz1 9d0uqWH75std6COnRdjMMUmXjo/RvPWbWbh6wfVsqmvX3G5D0e70gB+tSe14rp0CQdcngLerVuq dc6SPV7Lt3y33hr+etVS1vKDwyjkF06ZZISy2psX4YHThffms9t5+2JzGvoIAMfyw4eA== X-Developer-Key: i=dlan@gentoo.org; a=openpgp; fpr=50B03A1A5CBCD33576EF8CD7920C0DBCAABEFD55 The SDHCI controller found in SpacemiT K1 SoC features SD, SDIO, eMMC support, such as: - Compatible for 4-bit SDIO 3.0 UHS-I protocol, up to SDR104 - Compatible for 4-bit SD 3.0 UHS-I protocol, up to SDR104 - Compatible for 8bit eMMC5.1, up to HS400 Signed-off-by: Yixun Lan --- drivers/mmc/host/Kconfig | 14 ++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-of-k1.c | 306 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 321 insertions(+) diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 6824131b69b188cae58c8f48076715ca647ca28c..0ce78f22c33cfff916a2d4d680c79e9d19637e0e 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -250,6 +250,20 @@ config MMC_SDHCI_OF_DWCMSHC If you have a controller with this interface, say Y or M here. If unsure, say N. +config MMC_SDHCI_OF_K1 + tristate "SDHCI OF support for the SpacemiT K1 SoC" + depends on ARCH_SPACEMIT || COMPILE_TEST + depends on MMC_SDHCI_PLTFM + depends on OF + depends on COMMON_CLK + help + This selects the Secure Digital Host Controller Interface (SDHCI) + found in the SpacemiT K1 SoC. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + config MMC_SDHCI_OF_SPARX5 tristate "SDHCI OF support for the MCHP Sparx5 SoC" depends on MMC_SDHCI_PLTFM diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 5147467ec825ffaef3a7bd812fad80545e52b180..75bafc7b162b9e1d4c6c050f5d28b9d7cb582447 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -88,6 +88,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_AT91) += sdhci-of-at91.o obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o +obj-$(CONFIG_MMC_SDHCI_OF_K1) += sdhci-of-k1.o obj-$(CONFIG_MMC_SDHCI_OF_SPARX5) += sdhci-of-sparx5.o obj-$(CONFIG_MMC_SDHCI_OF_MA35D1) += sdhci-of-ma35d1.o obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c new file mode 100644 index 0000000000000000000000000000000000000000..8988053eeb33a476fa484d145579db6214b2d0b7 --- /dev/null +++ b/drivers/mmc/host/sdhci-of-k1.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023-2025 SpacemiT (Hangzhou) Technology Co. Ltd + * Copyright (c) 2025 Yixun Lan + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sdhci.h" +#include "sdhci-pltfm.h" + +#define SDHC_MMC_CTRL_REG 0x114 +#define MISC_INT_EN BIT(1) +#define MISC_INT BIT(2) +#define ENHANCE_STROBE_EN BIT(8) +#define MMC_HS400 BIT(9) +#define MMC_HS200 BIT(10) +#define MMC_CARD_MODE BIT(12) + +#define SDHC_TX_CFG_REG 0x11C +#define TX_INT_CLK_SEL BIT(30) +#define TX_MUX_SEL BIT(31) + +#define SDHC_PHY_CTRL_REG 0x160 +#define PHY_FUNC_EN BIT(0) +#define PHY_PLL_LOCK BIT(1) +#define HOST_LEGACY_MODE BIT(31) + +#define SDHC_PHY_FUNC_REG 0x164 +#define PHY_TEST_EN BIT(7) +#define HS200_USE_RFIFO BIT(15) + +#define SDHC_PHY_DLLCFG 0x168 +#define DLL_PREDLY_NUM GENMASK(3, 2) +#define DLL_FULLDLY_RANGE GENMASK(5, 4) +#define DLL_VREG_CTRL GENMASK(7, 6) +#define DLL_ENABLE BIT(31) + +#define SDHC_PHY_DLLCFG1 0x16C +#define DLL_REG1_CTRL GENMASK(7, 0) +#define DLL_REG2_CTRL GENMASK(15, 8) +#define DLL_REG3_CTRL GENMASK(23, 16) +#define DLL_REG4_CTRL GENMASK(31, 24) + +#define SDHC_PHY_DLLSTS 0x170 +#define DLL_LOCK_STATE BIT(0) + +#define SDHC_PHY_PADCFG_REG 0x178 +#define PHY_DRIVE_SEL GENMASK(2, 0) +#define RX_BIAS_CTRL BIT(5) + +struct spacemit_sdhci_host { + struct clk *clk_core; + struct clk *clk_io; +}; + +static inline void spacemit_sdhci_setbits(struct sdhci_host *host, u32 val, int reg) +{ + sdhci_writel(host, sdhci_readl(host, reg) | val, reg); +} + +static inline void spacemit_sdhci_clrbits(struct sdhci_host *host, u32 val, int reg) +{ + sdhci_writel(host, sdhci_readl(host, reg) & ~val, reg); +} + +static inline void spacemit_sdhci_clrsetbits(struct sdhci_host *host, u32 clr, u32 set, int reg) +{ + u32 val = sdhci_readl(host, reg); + + val = (val & ~clr) | set; + sdhci_writel(host, val, reg); +} + +static void spacemit_sdhci_reset(struct sdhci_host *host, u8 mask) +{ + struct platform_device *pdev; + + pdev = to_platform_device(mmc_dev(host->mmc)); + sdhci_reset(host, mask); + + if (mask != SDHCI_RESET_ALL) + return; + + spacemit_sdhci_setbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG); + + spacemit_sdhci_clrsetbits(host, PHY_DRIVE_SEL, + RX_BIAS_CTRL | FIELD_PREP(PHY_DRIVE_SEL, 4), + SDHC_PHY_PADCFG_REG); + + if (!(host->mmc->caps2 & MMC_CAP2_NO_MMC)) + spacemit_sdhci_setbits(host, MMC_CARD_MODE, SDHC_MMC_CTRL_REG); +} + +static void spacemit_sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned int timing) +{ + if (timing == MMC_TIMING_MMC_HS200) + spacemit_sdhci_setbits(host, MMC_HS200, SDHC_MMC_CTRL_REG); + + if (timing == MMC_TIMING_MMC_HS400) + spacemit_sdhci_setbits(host, MMC_HS400, SDHC_MMC_CTRL_REG); + + sdhci_set_uhs_signaling(host, timing); + + if (!(host->mmc->caps2 & MMC_CAP2_NO_SDIO)) + spacemit_sdhci_setbits(host, SDHCI_CTRL_VDD_180, SDHCI_HOST_CONTROL2); +} + +static void spacemit_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct mmc_host *mmc = host->mmc; + + if (mmc->ios.timing <= MMC_TIMING_UHS_SDR50) + spacemit_sdhci_setbits(host, TX_INT_CLK_SEL, SDHC_TX_CFG_REG); + else + spacemit_sdhci_clrbits(host, TX_INT_CLK_SEL, SDHC_TX_CFG_REG); + + sdhci_set_clock(host, clock); +}; + +static void spacemit_sdhci_phy_dll_init(struct sdhci_host *host) +{ + u32 state; + int ret; + + spacemit_sdhci_clrsetbits(host, DLL_PREDLY_NUM | DLL_FULLDLY_RANGE | DLL_VREG_CTRL, + FIELD_PREP(DLL_PREDLY_NUM, 1) | + FIELD_PREP(DLL_FULLDLY_RANGE, 1) | + FIELD_PREP(DLL_VREG_CTRL, 1), + SDHC_PHY_DLLCFG); + + spacemit_sdhci_clrsetbits(host, DLL_REG1_CTRL, + FIELD_PREP(DLL_REG1_CTRL, 0x92), + SDHC_PHY_DLLCFG1); + + spacemit_sdhci_setbits(host, DLL_ENABLE, SDHC_PHY_DLLCFG); + + ret = readl_poll_timeout(host->ioaddr + SDHC_PHY_DLLSTS, state, + state & DLL_LOCK_STATE, 2, 100); + if (ret == -ETIMEDOUT) + dev_warn(mmc_dev(host->mmc), "fail to lock phy dll in 100us!\n"); +} + +static void spacemit_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + + if (!ios->enhanced_strobe) { + spacemit_sdhci_clrbits(host, ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG); + return; + } + + spacemit_sdhci_setbits(host, ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG); + spacemit_sdhci_phy_dll_init(host); +} + +static unsigned int spacemit_sdhci_clk_get_max_clock(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + + return clk_get_rate(pltfm_host->clk); +} + +static int spacemit_sdhci_pre_select_hs400(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + + spacemit_sdhci_setbits(host, MMC_HS400, SDHC_MMC_CTRL_REG); + host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; + + return 0; +} + +static void spacemit_sdhci_post_select_hs400(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + + spacemit_sdhci_phy_dll_init(host); + host->mmc->caps &= ~MMC_CAP_WAIT_WHILE_BUSY; +} + +static void spacemit_sdhci_pre_hs400_to_hs200(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + + spacemit_sdhci_clrbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG); + spacemit_sdhci_clrbits(host, MMC_HS400 | MMC_HS200 | ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG); + spacemit_sdhci_clrbits(host, HS200_USE_RFIFO, SDHC_PHY_FUNC_REG); + + udelay(5); + + spacemit_sdhci_setbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG); +} + +static inline int spacemit_sdhci_get_clocks(struct device *dev, + struct sdhci_pltfm_host *pltfm_host) +{ + struct spacemit_sdhci_host *sdhst = sdhci_pltfm_priv(pltfm_host); + + sdhst->clk_core = devm_clk_get_enabled(dev, "core"); + if (IS_ERR(sdhst->clk_core)) + return -EINVAL; + + sdhst->clk_io = devm_clk_get_enabled(dev, "io"); + if (IS_ERR(sdhst->clk_io)) + return -EINVAL; + + pltfm_host->clk = sdhst->clk_io; + + return 0; +} + +static const struct sdhci_ops spacemit_sdhci_ops = { + .get_max_clock = spacemit_sdhci_clk_get_max_clock, + .reset = spacemit_sdhci_reset, + .set_bus_width = sdhci_set_bus_width, + .set_clock = spacemit_sdhci_set_clock, + .set_uhs_signaling = spacemit_sdhci_set_uhs_signaling, +}; + +static const struct sdhci_pltfm_data spacemit_sdhci_k1_pdata = { + .ops = &spacemit_sdhci_ops, + .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | + SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | + SDHCI_QUIRK_32BIT_ADMA_SIZE | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | + SDHCI_QUIRK_BROKEN_CARD_DETECTION | + SDHCI_QUIRK_BROKEN_TIMEOUT_VAL, + .quirks2 = SDHCI_QUIRK2_BROKEN_64_BIT_DMA | + SDHCI_QUIRK2_PRESET_VALUE_BROKEN, +}; + +static const struct of_device_id spacemit_sdhci_of_match[] = { + { .compatible = "spacemit,k1-sdhci" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, spacemit_sdhci_of_match); + +static int spacemit_sdhci_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct spacemit_sdhci_host *sdhst; + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_host *host; + struct mmc_host_ops *mops; + int ret; + + host = sdhci_pltfm_init(pdev, &spacemit_sdhci_k1_pdata, sizeof(*sdhst)); + if (IS_ERR(host)) + return PTR_ERR(host); + + pltfm_host = sdhci_priv(host); + + ret = mmc_of_parse(host->mmc); + if (ret) + goto err_pltfm; + + sdhci_get_of_property(pdev); + + if (!(host->mmc->caps2 & MMC_CAP2_NO_MMC)) { + mops = &host->mmc_host_ops; + mops->hs400_prepare_ddr = spacemit_sdhci_pre_select_hs400; + mops->hs400_complete = spacemit_sdhci_post_select_hs400; + mops->hs400_downgrade = spacemit_sdhci_pre_hs400_to_hs200; + mops->hs400_enhanced_strobe = spacemit_sdhci_hs400_enhanced_strobe; + } + + host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY; + + if (spacemit_sdhci_get_clocks(dev, pltfm_host)) + goto err_pltfm; + + ret = sdhci_add_host(host); + if (ret) + goto err_pltfm; + + return 0; + +err_pltfm: + sdhci_pltfm_free(pdev); + return ret; +} + +static struct platform_driver spacemit_sdhci_driver = { + .driver = { + .name = "sdhci-spacemit", + .of_match_table = of_match_ptr(spacemit_sdhci_of_match), + }, + .probe = spacemit_sdhci_probe, + .remove = sdhci_pltfm_remove, +}; +module_platform_driver(spacemit_sdhci_driver); + +MODULE_DESCRIPTION("SpacemiT SDHCI platform driver"); +MODULE_LICENSE("GPL");