From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5FF2AD49771 for ; Sun, 1 Dec 2024 15:07:41 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 2AC2589432; Sun, 1 Dec 2024 16:07:34 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="EDEfFOD5"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id D10B1893EC; Sun, 1 Dec 2024 16:07:32 +0100 (CET) Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 859E089137 for ; Sun, 1 Dec 2024 16:07:26 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=bigunclemax@gmail.com Received: by mail-lf1-x134.google.com with SMTP id 2adb3069b0e04-53df1d1b6f8so3724647e87.3 for ; Sun, 01 Dec 2024 07:07:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1733065645; x=1733670445; darn=lists.denx.de; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=399w4EBBYK5N3PvlKRK6p2qz6pT2ZFzPen73Jb+0NbQ=; b=EDEfFOD5JkS6xkhnD2ebf0Vd7EaGMsk7Pjy0wPC7tlq4+reotSRbtwlum38QjArnKb QzjRMWvOh356DPHI01lbbe3GA2Ng7L896Lsdw2Ndv9h8OzumpBUhprLYBpdo/U7uClQE 6ScgTyoKzZp5u4qd5V3hZZvYASVbY1rVQ0sXXI3b1UlsmUHi0Mf4m7yHUuQ0Y5oGocKl WngKVZFy1Q/uMbsl6zDC+m4V/7opm6Nb1LB3n+6LekUfUk7nkZsLPGiKuJtPU5UBCQ9i e39lB9RTedHjzucAuu/FONrMl3jyAxWRyvyzAL8N7ox8P8OO4dQMVVLnBYVpKGXvb3jH xn3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733065645; x=1733670445; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=399w4EBBYK5N3PvlKRK6p2qz6pT2ZFzPen73Jb+0NbQ=; b=mMQL0cbnfKPLNRvIq/w8Wp76O0DMidmogzjAiX6RzwUc8upyjm6LvL023S3KrELoJZ 9z5eOshD93do4bIq34AtUR1/nd9tRhiHWTYKNJjQggEz11+86regr42+GfuTadkQinaj EhxKC0X5V/oqaWwd92B1fa3KNHL+0ojPwI4FzoBqqLyMelWvxQ686r8aMD7U5Q66DhlR 6FCqH5AB223goYnGPtMCEj4FA/qDzM+eutNVF97Kb8/hP+TwfKecrzAEEGmtDo3yTbEt jrGi9mO6WJU7qLi+q7nmz5aYOwYCS3cdcX4PFft0ADF8FtFp5GQ1Xg3/H0PUtsxgNLVL ryhg== X-Forwarded-Encrypted: i=1; AJvYcCWi2Z4uCr17yaiB5kxurDnz6rFNr1ekDYLfGAIBCuzpmKwaIdXgfrBF+y377SIcq1XECkpUkkQ=@lists.denx.de X-Gm-Message-State: AOJu0YyPvRPHu+idXPUX6Yciyy1NAAzKIZxFHlrU0xV3ZbUJWnkarERi aCFTQVy3J7qInRpC0opYl1ldZjZs04zPsCJFdv01ojnZSvJR3S/i X-Gm-Gg: ASbGncszylFBpSZ4hY0XBwukSAGFlDYzTzXLCFTaqo1Bx2KpyKa9lGBNRU02dYqKqtt Rl0su//arQcKd7VL1hBHZFTsgLtE8J8RiNSPep95aWqnZxgIPkLPoeptFF9WuhtKU8iOWz56VUR bFv9xOGkThnjWf/TvGUI1LuK75PXDFBBtdcN38/Y+s8E5Et9BMzgwv9hkrSyf+/jt3pFHMd0ybV 8wh/5N7CguoaPrf3PsV0r4xKYY8i770YqxB9sn4Gd4WLc80pEjKd54o243mz/f6ZfPefk+4 X-Google-Smtp-Source: AGHT+IHBgjvFFfQ55Y+8H2c91RycXvj9m73JHq9T9KpL630bod8qqCKsx/48Q1Ff09AWOV+IIBI2cw== X-Received: by 2002:a05:6512:2391:b0:53d:cefe:ffbd with SMTP id 2adb3069b0e04-53df01125b0mr10547989e87.55.1733065644466; Sun, 01 Dec 2024 07:07:24 -0800 (PST) Received: from wpc.. (host-93-124-60-94.dsl.sura.ru. [93.124.60.94]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-53df646f1a7sm1101120e87.165.2024.12.01.07.07.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Dec 2024 07:07:23 -0800 (PST) From: bigunclemax@gmail.com To: Cc: bigunclemax@gmail.com, Heinrich Schuchardt , Rick Chen , Leo , Tom Rini , Wei Fu , Yixun Lan , Peng Fan , Jaehoon Chung , Ilias Apalodimas , Simon Glass , Sughosh Ganu , Jerome Forissier , Neil Armstrong , Greg Malysa , Raymond Mao , Heinrich Schuchardt , Linus Walleij , Kongyang Liu , Jonas Karlman , Marek Vasut , Wei Liang Lim , Kever Yang , Kuan Lim Lee , u-boot@lists.denx.de Subject: [PATCH v1 1/3] mmc: snps_sdhci: Add sdhci driver support for TH1520 SoC Date: Sun, 1 Dec 2024 18:06:54 +0300 Message-ID: <20241201150704.44462-2-bigunclemax@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241201150704.44462-1-bigunclemax@gmail.com> References: <20241201150704.44462-1-bigunclemax@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean From: Maksim Kiselev Add support for DesignWare SDHCI host controller on Alibaba TH1520 SoC Signed-off-by: Maksim Kiselev Tested-by: Heinrich Schuchardt --- Changes since RFC: - fixed HS400ES mode - added ADMA support drivers/mmc/Kconfig | 12 + drivers/mmc/Makefile | 1 + drivers/mmc/snps_sdhci.c | 494 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 507 insertions(+) create mode 100644 drivers/mmc/snps_sdhci.c diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 38817622fc..f4fdf15242 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -732,6 +732,18 @@ config MMC_SDHCI_S5P If unsure, say N. +config MMC_SDHCI_SNPS + bool "Synopsys DesignWare SDHCI controller" + depends on MMC_SDHCI + depends on DM_MMC + help + Support for DesignWare SDHCI host controller on Alibaba TH1520 SoC. + This is a highly configurable and programmable, high performance + Mobile Storage Host Controller (MSHC) with AXI as the bus interface + for data transfer. + + If unsure, say N. + config MMC_SDHCI_STI bool "SDHCI support for STMicroelectronics SoC" depends on MMC_SDHCI && OF_CONTROL diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 868f3090ff..90e76f9076 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -71,6 +71,7 @@ obj-$(CONFIG_MMC_SDHCI_NPCM) += npcm_sdhci.o obj-$(CONFIG_MMC_SDHCI_PIC32) += pic32_sdhci.o obj-$(CONFIG_MMC_SDHCI_ROCKCHIP) += rockchip_sdhci.o obj-$(CONFIG_MMC_SDHCI_S5P) += s5p_sdhci.o +obj-$(CONFIG_MMC_SDHCI_SNPS) += snps_sdhci.o obj-$(CONFIG_MMC_SDHCI_STI) += sti_sdhci.o obj-$(CONFIG_MMC_SDHCI_TANGIER) += tangier_sdhci.o obj-$(CONFIG_MMC_SDHCI_TEGRA) += tegra_mmc.o diff --git a/drivers/mmc/snps_sdhci.c b/drivers/mmc/snps_sdhci.c new file mode 100644 index 0000000000..d4ac2b7faf --- /dev/null +++ b/drivers/mmc/snps_sdhci.c @@ -0,0 +1,494 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2024 Maksim Kiselev + */ + +#include +#include +#include +#include + +/* DWCMSHC specific Mode Select value */ +#define DWCMSHC_CTRL_HS400 0x7 +/* 400KHz is max freq for card ID etc. Use that as min */ +#define EMMC_MIN_FREQ 400000 +#define SDHCI_TUNING_LOOP_COUNT 128 + +/* PHY register area pointer */ +#define DWC_MSHC_PTR_PHY_R 0x300 + +/* PHY general configuration */ +#define PHY_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x00) +#define PHY_CNFG_RSTN_DEASSERT 0x1 /* Deassert PHY reset */ +#define PHY_CNFG_PAD_SP_MASK GENMASK(19, 16) /* bits [19:16] */ +#define PHY_CNFG_PAD_SP 0x0c /* PMOS TX drive strength */ +#define PHY_CNFG_PAD_SN_MASK GENMASK(23, 20) /* bits [23:20] */ +#define PHY_CNFG_PAD_SN 0x0c /* NMOS TX drive strength */ + +/* PHY command/response pad settings */ +#define PHY_CMDPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x04) + +/* PHY data pad settings */ +#define PHY_DATAPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x06) + +/* PHY clock pad settings */ +#define PHY_CLKPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x08) + +/* PHY strobe pad settings */ +#define PHY_STBPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x0a) + +/* PHY reset pad settings */ +#define PHY_RSTNPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x0c) + +/* Bitfields are common for all pad settings */ +#define PHY_PAD_RXSEL_1V8 0x1 /* Receiver type select for 1.8V */ +#define PHY_PAD_RXSEL_3V3 0x2 /* Receiver type select for 3.3V */ + +#define PHY_PAD_WEAKPULL_MASK GENMASK(4, 3) /* bits [4:3] */ +#define PHY_PAD_WEAKPULL_PULLUP 0x1 /* Weak pull up enabled */ +#define PHY_PAD_WEAKPULL_PULLDOWN 0x2 /* Weak pull down enabled */ + +#define PHY_PAD_TXSLEW_CTRL_P_MASK GENMASK(8, 5) /* bits [8:5] */ +#define PHY_PAD_TXSLEW_CTRL_P 0x3 /* Slew control for P-Type pad TX */ +#define PHY_PAD_TXSLEW_CTRL_N_MASK GENMASK(12, 9) /* bits [12:9] */ +#define PHY_PAD_TXSLEW_CTRL_N 0x3 /* Slew control for N-Type pad TX */ + +/* PHY CLK delay line settings */ +#define PHY_SDCLKDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x1d) +#define PHY_SDCLKDL_CNFG_UPDATE BIT(4) /* set before writing to SDCLKDL_DC */ + +/* PHY CLK delay line delay code */ +#define PHY_SDCLKDL_DC_R (DWC_MSHC_PTR_PHY_R + 0x1e) +#define PHY_SDCLKDL_DC_INITIAL 0x40 /* initial delay code */ +#define PHY_SDCLKDL_DC_DEFAULT 0x32 /* default delay code */ +#define PHY_SDCLKDL_DC_HS400 0x18 /* delay code for HS400 mode */ + +/* PHY drift_cclk_rx delay line configuration setting */ +#define PHY_ATDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x21) +#define PHY_ATDL_CNFG_INPSEL_MASK GENMASK(3, 2) /* bits [3:2] */ +#define PHY_ATDL_CNFG_INPSEL 0x3 /* delay line input source */ + +/* PHY DLL control settings */ +#define PHY_DLL_CTRL_R (DWC_MSHC_PTR_PHY_R + 0x24) +#define PHY_DLL_CTRL_DISABLE 0x0 /* PHY DLL is enabled */ +#define PHY_DLL_CTRL_ENABLE 0x1 /* PHY DLL is disabled */ + +/* PHY DLL configuration register 1 */ +#define PHY_DLL_CNFG1_R (DWC_MSHC_PTR_PHY_R + 0x25) +#define PHY_DLL_CNFG1_SLVDLY_MASK GENMASK(5, 4) /* bits [5:4] */ +#define PHY_DLL_CNFG1_SLVDLY 0x2 /* DLL slave update delay input */ +#define PHY_DLL_CNFG1_WAITCYCLE 0x5 /* DLL wait cycle input */ + +/* PHY DLL configuration register 2 */ +#define PHY_DLL_CNFG2_R (DWC_MSHC_PTR_PHY_R + 0x26) +#define PHY_DLL_CNFG2_JUMPSTEP 0xa /* DLL jump step input */ + +/* PHY DLL master and slave delay line configuration settings */ +#define PHY_DLLDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x28) +#define PHY_DLLDL_CNFG_SLV_INPSEL_MASK GENMASK(6, 5) /* bits [6:5] */ +#define PHY_DLLDL_CNFG_SLV_INPSEL 0x3 /* clock source select for slave DL */ + +/* Vendor specific Registers */ +#define P_VENDOR_SPECIFIC_AREA 0x500 + +#define DWCMSHC_EMMC_CONTROL 0x2c +#define DWCMSHC_CARD_IS_EMMC BIT(0) +#define DWCMSHC_ENHANCED_STROBE BIT(8) +#define DWCMSHC_EMMC_ATCTRL 0x40 +/* Tuning and auto-tuning fields in AT_CTRL_R control register */ +#define AT_CTRL_AT_EN BIT(0) /* autotuning is enabled */ +#define AT_CTRL_CI_SEL BIT(1) /* interval to drive center phase select */ +#define AT_CTRL_SWIN_TH_EN BIT(2) /* sampling window threshold enable */ +#define AT_CTRL_RPT_TUNE_ERR BIT(3) /* enable reporting framing errors */ +#define AT_CTRL_SW_TUNE_EN BIT(4) /* enable software managed tuning */ +#define AT_CTRL_WIN_EDGE_SEL_MASK GENMASK(11, 8) /* bits [11:8] */ +#define AT_CTRL_WIN_EDGE_SEL 0xf /* sampling window edge select */ +#define AT_CTRL_TUNE_CLK_STOP_EN BIT(16) /* clocks stopped during phase code change */ +#define AT_CTRL_PRE_CHANGE_DLY_MASK GENMASK(18, 17) /* bits [18:17] */ +#define AT_CTRL_PRE_CHANGE_DLY 0x1 /* 2-cycle latency */ +#define AT_CTRL_POST_CHANGE_DLY_MASK GENMASK(20, 19) /* bits [20:19] */ +#define AT_CTRL_POST_CHANGE_DLY 0x3 /* 4-cycle latency */ +#define AT_CTRL_SWIN_TH_VAL_MASK GENMASK(31, 24) /* bits [31:24] */ +#define AT_CTRL_SWIN_TH_VAL 0x9 /* sampling window threshold */ + +#define FLAG_IO_FIXED_1V8 BIT(0) + +#define BOUNDARY_OK(addr, len) \ + ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) + +struct snps_sdhci_plat { + struct mmc_config cfg; + struct mmc mmc; + u16 delay_line; + u16 flags; +}; + +/* + * If DMA addr spans 128MB boundary, we split the DMA transfer into two + * so that each DMA transfer doesn't exceed the boundary. + */ +void snps_sdhci_adma_write_desc(struct sdhci_host *host, void **desc, + dma_addr_t addr, int len, bool end) +{ + int tmplen, offset; + + if (likely(!len || BOUNDARY_OK(addr, len))) { + sdhci_adma_write_desc(host, desc, addr, len, end); + return; + } + + offset = addr & (SZ_128M - 1); + tmplen = SZ_128M - offset; + sdhci_adma_write_desc(host, desc, addr, tmplen, false); + + addr += tmplen; + len -= tmplen; + sdhci_adma_write_desc(host, desc, addr, len, end); +} + +static void sdhci_phy_1_8v_init(struct sdhci_host *host) +{ + struct snps_sdhci_plat *plat = dev_get_plat(host->mmc->dev); + u32 val; + + /* deassert phy reset & set tx drive strength */ + val = PHY_CNFG_RSTN_DEASSERT; + val |= FIELD_PREP(PHY_CNFG_PAD_SP_MASK, PHY_CNFG_PAD_SP); + val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN); + sdhci_writel(host, val, PHY_CNFG_R); + + /* disable delay line */ + sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R); + + /* set delay line */ + sdhci_writeb(host, plat->delay_line, PHY_SDCLKDL_DC_R); + sdhci_writeb(host, PHY_DLL_CNFG2_JUMPSTEP, PHY_DLL_CNFG2_R); + + /* enable delay lane */ + val = sdhci_readb(host, PHY_SDCLKDL_CNFG_R); + val &= ~(PHY_SDCLKDL_CNFG_UPDATE); + sdhci_writeb(host, val, PHY_SDCLKDL_CNFG_R); + + /* configure phy pads */ + val = PHY_PAD_RXSEL_1V8; + val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLUP); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_CMDPAD_CNFG_R); + sdhci_writew(host, val, PHY_DATAPAD_CNFG_R); + sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R); + + val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_CLKPAD_CNFG_R); + + val = PHY_PAD_RXSEL_1V8; + val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLDOWN); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_STBPAD_CNFG_R); + + /* enable data strobe mode */ + sdhci_writeb(host, FIELD_PREP(PHY_DLLDL_CNFG_SLV_INPSEL_MASK, PHY_DLLDL_CNFG_SLV_INPSEL), + PHY_DLLDL_CNFG_R); + + /* enable phy dll */ + sdhci_writeb(host, PHY_DLL_CTRL_ENABLE, PHY_DLL_CTRL_R); +} + +static void sdhci_phy_3_3v_init(struct sdhci_host *host) +{ + struct snps_sdhci_plat *plat = dev_get_plat(host->mmc->dev); + u32 val; + + /* deassert phy reset & set tx drive strength */ + val = PHY_CNFG_RSTN_DEASSERT; + val |= FIELD_PREP(PHY_CNFG_PAD_SP_MASK, PHY_CNFG_PAD_SP); + val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN); + sdhci_writel(host, val, PHY_CNFG_R); + + /* disable delay line */ + sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R); + + /* set delay line */ + sdhci_writeb(host, plat->delay_line, PHY_SDCLKDL_DC_R); + sdhci_writeb(host, PHY_DLL_CNFG2_JUMPSTEP, PHY_DLL_CNFG2_R); + + /* enable delay lane */ + val = sdhci_readb(host, PHY_SDCLKDL_CNFG_R); + val &= ~(PHY_SDCLKDL_CNFG_UPDATE); + sdhci_writeb(host, val, PHY_SDCLKDL_CNFG_R); + + /* configure phy pads */ + val = PHY_PAD_RXSEL_3V3; + val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLUP); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_CMDPAD_CNFG_R); + sdhci_writew(host, val, PHY_DATAPAD_CNFG_R); + sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R); + + val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_CLKPAD_CNFG_R); + + val = PHY_PAD_RXSEL_3V3; + val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLDOWN); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P); + val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N); + sdhci_writew(host, val, PHY_STBPAD_CNFG_R); + + /* enable phy dll */ + sdhci_writeb(host, PHY_DLL_CTRL_ENABLE, PHY_DLL_CTRL_R); +} + +static void snps_sdhci_set_phy(struct sdhci_host *host) +{ + struct snps_sdhci_plat *plat = dev_get_plat(host->mmc->dev); + struct mmc *mmc = host->mmc; + + /* Before power on, set PHY configs */ + if ((plat->flags & FLAG_IO_FIXED_1V8) || + mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) + sdhci_phy_1_8v_init(host); + else + sdhci_phy_3_3v_init(host); + + sdhci_writeb(host, FIELD_PREP(PHY_DLL_CNFG1_SLVDLY_MASK, PHY_DLL_CNFG1_SLVDLY) | + PHY_DLL_CNFG1_WAITCYCLE, PHY_DLL_CNFG1_R); +} + +static int snps_sdhci_set_ios_post(struct sdhci_host *host) +{ + struct snps_sdhci_plat *plat = dev_get_plat(host->mmc->dev); + struct mmc *mmc = host->mmc; + u32 reg; + + reg = sdhci_readw(host, SDHCI_HOST_CONTROL2); + reg &= ~SDHCI_CTRL_UHS_MASK; + + switch (mmc->selected_mode) { + case UHS_SDR50: + case MMC_HS_52: + reg |= SDHCI_CTRL_UHS_SDR50; + break; + case UHS_DDR50: + case MMC_DDR_52: + reg |= SDHCI_CTRL_UHS_DDR50; + break; + case UHS_SDR104: + case MMC_HS_200: + reg |= SDHCI_CTRL_UHS_SDR104; + break; + case MMC_HS_400: + case MMC_HS_400_ES: + reg |= DWCMSHC_CTRL_HS400; + break; + default: + reg |= SDHCI_CTRL_UHS_SDR12; + } + + if ((plat->flags & FLAG_IO_FIXED_1V8) || + mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) + reg |= SDHCI_CTRL_VDD_180; + else + reg &= ~SDHCI_CTRL_VDD_180; + + sdhci_writew(host, reg, SDHCI_HOST_CONTROL2); + + reg = sdhci_readw(host, P_VENDOR_SPECIFIC_AREA + DWCMSHC_EMMC_CONTROL); + + if (IS_MMC(mmc)) + reg |= DWCMSHC_CARD_IS_EMMC; + else + reg &= ~DWCMSHC_CARD_IS_EMMC; + + if (mmc->selected_mode == MMC_HS_400_ES) + reg |= DWCMSHC_ENHANCED_STROBE; + else + reg &= ~DWCMSHC_ENHANCED_STROBE; + + sdhci_writeb(host, reg, P_VENDOR_SPECIFIC_AREA + DWCMSHC_EMMC_CONTROL); + + if (mmc->selected_mode == MMC_HS_400 || + mmc->selected_mode == MMC_HS_400_ES) + plat->delay_line = PHY_SDCLKDL_DC_HS400; + else + sdhci_writeb(host, 0, PHY_DLLDL_CNFG_R); + + snps_sdhci_set_phy(host); + + return 0; +} + +static int snps_sdhci_execute_tuning(struct mmc *mmc, u8 opcode) +{ + struct sdhci_host *host = dev_get_priv(mmc->dev); + char tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT; + struct mmc_cmd cmd; + u32 ctrl, blk_size, val; + int ret; + + sdhci_writeb(host, FIELD_PREP(PHY_ATDL_CNFG_INPSEL_MASK, PHY_ATDL_CNFG_INPSEL), + PHY_ATDL_CNFG_R); + val = sdhci_readl(host, P_VENDOR_SPECIFIC_AREA + DWCMSHC_EMMC_ATCTRL); + + /* + * configure tuning settings: + * - center phase select code driven in block gap interval + * - disable reporting of framing errors + * - disable software managed tuning + * - disable user selection of sampling window edges, + * instead tuning calculated edges are used + */ + val &= ~(AT_CTRL_CI_SEL | AT_CTRL_RPT_TUNE_ERR | AT_CTRL_SW_TUNE_EN | + FIELD_PREP(AT_CTRL_WIN_EDGE_SEL_MASK, AT_CTRL_WIN_EDGE_SEL)); + + /* + * configure tuning settings: + * - enable auto-tuning + * - enable sampling window threshold + * - stop clocks during phase code change + * - set max latency in cycles between tx and rx clocks + * - set max latency in cycles to switch output phase + * - set max sampling window threshold value + */ + val |= AT_CTRL_AT_EN | AT_CTRL_SWIN_TH_EN | AT_CTRL_TUNE_CLK_STOP_EN; + val |= FIELD_PREP(AT_CTRL_PRE_CHANGE_DLY_MASK, AT_CTRL_PRE_CHANGE_DLY); + val |= FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, AT_CTRL_POST_CHANGE_DLY); + val |= FIELD_PREP(AT_CTRL_SWIN_TH_VAL_MASK, AT_CTRL_SWIN_TH_VAL); + + sdhci_writel(host, val, P_VENDOR_SPECIFIC_AREA + DWCMSHC_EMMC_ATCTRL); + val = sdhci_readl(host, P_VENDOR_SPECIFIC_AREA + DWCMSHC_EMMC_ATCTRL); + + /* perform tuning */ + ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); + ctrl |= SDHCI_CTRL_EXEC_TUNING; + sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); + + blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 64); + if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && mmc->bus_width == 8) + blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 128); + sdhci_writew(host, blk_size, SDHCI_BLOCK_SIZE); + sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); + + cmd.cmdidx = opcode; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + + do { + ret = mmc_send_cmd(mmc, &cmd, NULL); + ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); + if (ret || tuning_loop_counter-- == 0) + break; + + } while (ctrl & SDHCI_CTRL_EXEC_TUNING); + + if (ret || tuning_loop_counter < 0 || !(ctrl & SDHCI_CTRL_TUNED_CLK)) { + if (!ret) + ret = -EIO; + printf("%s: Tuning failed: %d\n", __func__, ret); + + ctrl &= ~SDHCI_CTRL_TUNED_CLK; + ctrl &= ~SDHCI_CTRL_EXEC_TUNING; + sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); + } + + return ret; +} + +static int snps_sdhci_set_enhanced_strobe(struct sdhci_host *host) +{ + return 0; +} + +static const struct sdhci_ops snps_sdhci_ops = { + .set_ios_post = snps_sdhci_set_ios_post, + .platform_execute_tuning = snps_sdhci_execute_tuning, + .set_enhanced_strobe = snps_sdhci_set_enhanced_strobe, +#if CONFIG_IS_ENABLED(CONFIG_MMC_SDHCI_ADMA_HELPERS) + .adma_write_desc = snps_sdhci_adma_write_desc, +#endif +}; + +static int snps_sdhci_probe(struct udevice *dev) +{ + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct snps_sdhci_plat *plat = dev_get_plat(dev); + struct mmc_config *cfg = &plat->cfg; + struct sdhci_host *host = dev_get_priv(dev); + struct clk clk; + int ret; + + plat->delay_line = PHY_SDCLKDL_DC_DEFAULT; + + host->max_clk = cfg->f_max; + ret = clk_get_by_index(dev, 0, &clk); + if (!ret) { + ret = clk_set_rate(&clk, host->max_clk); + if (IS_ERR_VALUE(ret)) + printf("%s clk set rate fail!\n", __func__); + } else { + printf("%s fail to get clk\n", __func__); + } + + host->ops = &snps_sdhci_ops; + + host->mmc = &plat->mmc; + host->mmc->priv = host; + host->mmc->dev = dev; + upriv->mmc = host->mmc; + + ret = sdhci_setup_cfg(cfg, host, cfg->f_max, EMMC_MIN_FREQ); + if (ret) + return ret; + + if ((dev_read_bool(dev, "mmc-ddr-1_8v")) || + (dev_read_bool(dev, "mmc-hs200-1_8v")) || + (dev_read_bool(dev, "mmc-hs400-1_8v"))) + plat->flags |= FLAG_IO_FIXED_1V8; + else + plat->flags &= ~FLAG_IO_FIXED_1V8; + + return sdhci_probe(dev); +} + +static int snps_sdhci_of_to_plat(struct udevice *dev) +{ + struct snps_sdhci_plat *plat = dev_get_plat(dev); + struct mmc_config *cfg = &plat->cfg; + struct sdhci_host *host = dev_get_priv(dev); + int ret; + + host->name = dev->name; + host->ioaddr = dev_read_addr_ptr(dev); + + ret = mmc_of_parse(dev, cfg); + if (ret) + return ret; + + return 0; +} + +static int snps_sdhci_bind(struct udevice *dev) +{ + struct snps_sdhci_plat *plat = dev_get_plat(dev); + + return sdhci_bind(dev, &plat->mmc, &plat->cfg); +} + +static const struct udevice_id snps_sdhci_ids[] = { + { .compatible = "thead,th1520-dwcmshc" } +}; + +U_BOOT_DRIVER(snps_sdhci_drv) = { + .name = "snps_sdhci", + .id = UCLASS_MMC, + .of_match = snps_sdhci_ids, + .of_to_plat = snps_sdhci_of_to_plat, + .ops = &sdhci_ops, + .bind = snps_sdhci_bind, + .probe = snps_sdhci_probe, + .priv_auto = sizeof(struct sdhci_host), + .plat_auto = sizeof(struct snps_sdhci_plat), +}; -- 2.45.2