From patchwork Thu Aug 29 10:15:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 823782 Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) (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 B97E91922FB; Thu, 29 Aug 2024 10:16:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724926613; cv=none; b=usHnLu8lfmAmJA939MGYZzQS3Rr0Nl1ux7X1S0gz1MZxE1s9s8MH6pZdP36ZrxcCuFJL+XgN+IJKF/iG3LCHzizVbw4g+jEkRnMn7BHD/bjJuUOJYtsm/RZgSI/7gex9VBGNN6+ge+2qTcBrBgpaasW+7xof/dGzl0jDGsvSNmo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724926613; c=relaxed/simple; bh=EoiBO2Y/2uryO1RTXHHyms01n/cD8GJb60Dza3/G490=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MFSJ2Ie7xdN2yoUOBNuNaaO4d2YkbJIjr0wAWZzos6CupNNx0lQQLBpyEi/s5H55bENVyCVTyZob2BSfovvz7bKVJ22BhFWsh11bQ0EKMG9ij8AQdcG4bBeDtezTjV2rsddnskE7/ErdPJDmGqTufpAFPT2nrcm9m9AktJgQ4w4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CFrMzEtm; arc=none smtp.client-ip=209.85.210.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CFrMzEtm" Received: by mail-pf1-f172.google.com with SMTP id d2e1a72fcca58-7141b04e7a3so422551b3a.3; Thu, 29 Aug 2024 03:16:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1724926611; x=1725531411; darn=vger.kernel.org; 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=pa7M4azoFxc2RkbWlkHHJ+nRAWJGJL0xbebLOGI6zdQ=; b=CFrMzEtmBx3al8AFP76USpLEb7lEPw9UtJpSY/waZ2p793xoEqzZC9CdFLqV/uTso6 ZO9IA19u2/dRwOOnXACeVxCgw7M1qX5HcqZkCJTnAHieToVlbDxn5pGvA/KEO2tpDrVD YHo8s1aBsi/YfuB9tzEDe4fFZhY36dKxbHlVp0FBBOUxSX2WNlTh5I9ybrCIs01Zj79o dIctZP0tytjLygok0+a7jxmOc5IIzU5hNeDS9Ljoc1wPxZDXWrz473GY782sM+4tTU3A 90j/l97oq1JzVTO1j0lB41oCK+ex8aQI4tTjrsn9H3t8I3pHR5VXKUCPJHSdu+T8OVdR HBzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724926611; x=1725531411; 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=pa7M4azoFxc2RkbWlkHHJ+nRAWJGJL0xbebLOGI6zdQ=; b=frty2KetUhyUhwOnyKeEDUCs+T50IGu6etTTgJ/sFRdpbD/LveRkhJXshtJtRpybi3 HWkWsr13995KEvPQArGDBa7D+ENNB7PI0N6ADasRzxZ4fWxVnz7NZuGtouODkqB7TcZo WcJL0lr316W4ynHQfprbMYOfaahsi3cqqbDPoAtFyDiJfYpO3Ccfr8XrjY/BX7nP8hJB a+LvAeCSszEq/OL8h5OipNV0BvGWz1xDvLJD3e6H0TZZT5PbpaDG77TYsTuAh4G05e/E +kLbxEMgnnRdLMz2rflP07DQdUvGZuNNjlB14Fbuumxt9BsmiEnjZwY/kkl1stHkhKxs hs+Q== X-Forwarded-Encrypted: i=1; AJvYcCUhBWStFFUhp+APYfPLL0gS7n1SN17ZFwXOBkUXJYaB9niibfVtpCFd6Z/6QiFjJbXgcYfLpaYr1HM1+L8=@vger.kernel.org X-Gm-Message-State: AOJu0Yw9pHyQK181/B/2kl3Sf57sPUB7frqqyZXRd1Ok6YXKUXuW0bzL VRCTv1cYUuarK5jgFktIDTfoeG4xkkPAUVgynk9+5PrCEM89X2ht X-Google-Smtp-Source: AGHT+IHlQ3q2K+KQ9aPoUjSQIuIZMZm6phJg4UWoI4J5RHcmgCb+4CdFCOrqruib1ISBeyEfY5FmZQ== X-Received: by 2002:a05:6a21:9103:b0:1c4:a7a0:a7d4 with SMTP id adf61e73a8af0-1cce100384emr1911711637.7.1724926610771; Thu, 29 Aug 2024 03:16:50 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:479:a52:632f:b914:4ddf:273]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-715e56d77eesm816577b3a.153.2024.08.29.03.16.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2024 03:16:50 -0700 (PDT) From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, Lucas.Lai@genesyslogic.com.tw, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, dlunev@chromium.org, Victor Shih , Ben Chuang , AKASHI Takahiro , Victor Shih Subject: [PATCH V19 15/22] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface Date: Thu, 29 Aug 2024 18:15:32 +0800 Message-Id: <20240829101539.5058-16-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240829101539.5058-1-victorshihgli@gmail.com> References: <20240829101539.5058-1-victorshihgli@gmail.com> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Victor Shih UHS-II interface (related registers) will be initialized here. The operations include mmc's uhs2_set_reg operations, mmc's uhs2_detect_init operations, uhs2_[enable|disable]_clk operations, uhs2_set_ios operations. After detected the UHS-II interface, the host's UHS-II capabilities will be set up here and interrupts will also be enabled. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- Updates in V15: - Resolve merge conflicts and reduce unnecessary line breaks. Updates in V13: - Merge Patch#15, Patch#16 and Patch#17 of v12 version into Patch#15 in v13 version. - Use definitions to simplify code. - Modify comment message. --- drivers/mmc/host/sdhci-uhs2.c | 228 ++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index abb56ab8f916..a521e3dbfca7 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -25,6 +25,9 @@ pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x) #define UHS2_RESET_TIMEOUT_100MS 100000 +#define UHS2_CHECK_DORMANT_TIMEOUT_100MS 100000 +#define UHS2_INTERFACE_DETECT_TIMEOUT_100MS 100000 +#define UHS2_LANE_SYNC_TIMEOUT_150MS 150000 void sdhci_uhs2_dump_regs(struct sdhci_host *host) { @@ -302,6 +305,229 @@ static int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) return 0; } +static int sdhci_uhs2_interface_detect(struct sdhci_host *host) +{ + u32 val; + + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IF_DETECT), + 100, UHS2_INTERFACE_DETECT_TIMEOUT_100MS, true, + host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: not detect UHS2 interface in 100ms.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + + /* Enable UHS2 error interrupts */ + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_ALL_MASK, SDHCI_UHS2_INT_ERROR_MASK); + + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_LANE_SYNC), + 100, UHS2_LANE_SYNC_TIMEOUT_150MS, true, host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: UHS2 Lane sync fail in 150ms.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + + DBG("%s: UHS2 Lane synchronized in UHS2 mode, PHY is initialized.\n", + mmc_hostname(host->mmc)); + return 0; +} + +static int sdhci_uhs2_init(struct sdhci_host *host) +{ + u16 caps_ptr = 0; + u32 caps_gen = 0; + u32 caps_phy = 0; + u32 caps_tran[2] = {0, 0}; + struct mmc_host *mmc = host->mmc; + + caps_ptr = sdhci_readw(host, SDHCI_UHS2_CAPS_PTR); + if (caps_ptr < 0x100 || caps_ptr > 0x1FF) { + pr_err("%s: SDHCI_UHS2_CAPS_PTR(%d) is wrong.\n", + mmc_hostname(mmc), caps_ptr); + return -ENODEV; + } + caps_gen = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_OFFSET); + caps_phy = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_PHY_OFFSET); + caps_tran[0] = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_TRAN_OFFSET); + caps_tran[1] = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_TRAN_1_OFFSET); + + /* General Caps */ + mmc->uhs2_caps.dap = caps_gen & SDHCI_UHS2_CAPS_DAP_MASK; + mmc->uhs2_caps.gap = FIELD_GET(SDHCI_UHS2_CAPS_GAP_MASK, caps_gen); + mmc->uhs2_caps.n_lanes = FIELD_GET(SDHCI_UHS2_CAPS_LANE_MASK, caps_gen); + mmc->uhs2_caps.addr64 = (caps_gen & SDHCI_UHS2_CAPS_ADDR_64) ? 1 : 0; + mmc->uhs2_caps.card_type = FIELD_GET(SDHCI_UHS2_CAPS_DEV_TYPE_MASK, caps_gen); + + /* PHY Caps */ + mmc->uhs2_caps.phy_rev = caps_phy & SDHCI_UHS2_CAPS_PHY_REV_MASK; + mmc->uhs2_caps.speed_range = FIELD_GET(SDHCI_UHS2_CAPS_PHY_RANGE_MASK, caps_phy); + mmc->uhs2_caps.n_lss_sync = FIELD_GET(SDHCI_UHS2_CAPS_PHY_N_LSS_SYN_MASK, caps_phy); + mmc->uhs2_caps.n_lss_dir = FIELD_GET(SDHCI_UHS2_CAPS_PHY_N_LSS_DIR_MASK, caps_phy); + if (mmc->uhs2_caps.n_lss_sync == 0) + mmc->uhs2_caps.n_lss_sync = 16 << 2; + else + mmc->uhs2_caps.n_lss_sync <<= 2; + if (mmc->uhs2_caps.n_lss_dir == 0) + mmc->uhs2_caps.n_lss_dir = 16 << 3; + else + mmc->uhs2_caps.n_lss_dir <<= 3; + + /* LINK/TRAN Caps */ + mmc->uhs2_caps.link_rev = caps_tran[0] & SDHCI_UHS2_CAPS_TRAN_LINK_REV_MASK; + mmc->uhs2_caps.n_fcu = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_N_FCU_MASK, caps_tran[0]); + if (mmc->uhs2_caps.n_fcu == 0) + mmc->uhs2_caps.n_fcu = 256; + mmc->uhs2_caps.host_type = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_HOST_TYPE_MASK, caps_tran[0]); + mmc->uhs2_caps.maxblk_len = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_BLK_LEN_MASK, caps_tran[0]); + mmc->uhs2_caps.n_data_gap = caps_tran[1] & SDHCI_UHS2_CAPS_TRAN_1_N_DATA_GAP_MASK; + + return 0; +} + +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + + DBG("Begin do uhs2 detect init.\n"); + + if (sdhci_uhs2_interface_detect(host)) { + pr_warn("%s: cannot detect UHS2 interface.\n", mmc_hostname(host->mmc)); + return -EIO; + } + + if (sdhci_uhs2_init(host)) { + pr_warn("%s: UHS2 init fail.\n", mmc_hostname(host->mmc)); + return -EIO; + } + + /* Init complete, do soft reset and enable UHS2 error irqs. */ + sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_SD); + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_ALL_MASK, SDHCI_UHS2_INT_ERROR_MASK); + /* + * N.B SDHCI_INT_ENABLE and SDHCI_SIGNAL_ENABLE was cleared + * by SDHCI_UHS2_SW_RESET_SD + */ + sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); + sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); + + return 0; +} + +static int sdhci_uhs2_disable_clk(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + u16 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + + clk &= ~SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); + + return 0; +} + +static int sdhci_uhs2_enable_clk(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + u16 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + int timeout_us = 20000; /* 20ms */ + u32 val; + + clk |= SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); + + if (read_poll_timeout(sdhci_readw, val, (val & SDHCI_CLOCK_INT_STABLE), + 10, timeout_us, true, host, SDHCI_CLOCK_CONTROL)) { + pr_err("%s: Internal clock never stabilised.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + return 0; +} + +static void sdhci_uhs2_set_config(struct sdhci_host *host) +{ + u32 value; + u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR); + u16 sdhci_uhs2_gen_set_reg = sdhci_uhs2_set_ptr; + u16 sdhci_uhs2_phy_set_reg = sdhci_uhs2_set_ptr + 4; + u16 sdhci_uhs2_tran_set_reg = sdhci_uhs2_set_ptr + 8; + u16 sdhci_uhs2_tran_set_1_reg = sdhci_uhs2_set_ptr + 12; + + /* Set Gen Settings */ + value = FIELD_PREP(SDHCI_UHS2_GEN_SETTINGS_N_LANES_MASK, host->mmc->uhs2_caps.n_lanes_set); + sdhci_writel(host, value, sdhci_uhs2_gen_set_reg); + + /* Set PHY Settings */ + value = FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_DIR_MASK, host->mmc->uhs2_caps.n_lss_dir_set) | + FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_SYN_MASK, host->mmc->uhs2_caps.n_lss_sync_set); + if (host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B || + host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD) + value |= SDHCI_UHS2_PHY_SET_SPEED_B; + sdhci_writel(host, value, sdhci_uhs2_phy_set_reg); + + /* Set LINK-TRAN Settings */ + value = FIELD_PREP(SDHCI_UHS2_TRAN_RETRY_CNT_MASK, host->mmc->uhs2_caps.max_retry_set) | + FIELD_PREP(SDHCI_UHS2_TRAN_N_FCU_MASK, host->mmc->uhs2_caps.n_fcu_set); + sdhci_writel(host, value, sdhci_uhs2_tran_set_reg); + sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set, sdhci_uhs2_tran_set_1_reg); +} + +static int sdhci_uhs2_check_dormant(struct sdhci_host *host) +{ + u32 val; + + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE), + 100, UHS2_CHECK_DORMANT_TIMEOUT_100MS, true, host, + SDHCI_PRESENT_STATE)) { + pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + return 0; +} + +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct mmc_ios *ios = &mmc->ios; + int err = 0; + + DBG("Begin uhs2 control, act %d.\n", op); + + switch (op) { + case UHS2_PHY_INIT: + err = sdhci_uhs2_do_detect_init(mmc); + break; + case UHS2_SET_CONFIG: + sdhci_uhs2_set_config(host); + break; + case UHS2_ENABLE_INT: + sdhci_uhs2_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT); + break; + case UHS2_DISABLE_INT: + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0); + break; + case UHS2_CHECK_DORMANT: + err = sdhci_uhs2_check_dormant(host); + break; + case UHS2_DISABLE_CLK: + err = sdhci_uhs2_disable_clk(mmc); + break; + case UHS2_ENABLE_CLK: + err = sdhci_uhs2_enable_clk(mmc); + break; + case UHS2_SET_IOS: + err = sdhci_uhs2_set_ios(mmc, ios); + break; + default: + pr_err("%s: input sd uhs2 operation %d is wrong!\n", + mmc_hostname(host->mmc), op); + err = -EIO; + break; + } + + return err; +} + /*****************************************************************************\ * * * Driver init/exit * @@ -310,6 +536,8 @@ static int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) static int sdhci_uhs2_host_ops_init(struct sdhci_host *host) { + host->mmc_host_ops.uhs2_control = sdhci_uhs2_control; + return 0; }