From patchwork Mon Jan 23 19:27:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Piyush Malgujar X-Patchwork-Id: 645873 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B089C54EAA for ; Mon, 23 Jan 2023 19:28:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232546AbjAWT2q (ORCPT ); Mon, 23 Jan 2023 14:28:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232398AbjAWT2p (ORCPT ); Mon, 23 Jan 2023 14:28:45 -0500 Received: from mx0b-0016f401.pphosted.com (mx0b-0016f401.pphosted.com [67.231.156.173]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27004A24F; Mon, 23 Jan 2023 11:28:43 -0800 (PST) Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30NG9C8K006267; Mon, 23 Jan 2023 11:28:33 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=pfpt0220; bh=QYqBEalRnj5G8hO6nXMYQ36s9REDirGzeChEReC5r44=; b=hjLtJYJ2ZMnjVvOAUVaG6Dy0bT++EXAnVL5HLUs0C1SPMZC7V9KQFxJ2aPWbYr4ake4K irm3LmiAG0tElbWFyeMGbkJsmra66qXlAhvag4aGN0ZAd433y8AuVcWWBOYKtT7xPAqj A8di1zu05DIzhF0RuZxl+gi+YexBZMxXm00IhJVDn9btHxdofZ0LZEKIQiZesypfYgN5 WowkHexzafx2oAgXk2cz4oiqRfS9JEtt2/JjLhGpRYhTMRFdfePlEM2wgG1xfzQRytW/ nM3xKsvKrqOL1fNqNWOCIx44xGMHJb9z0yzDz3fCrw870atBBMBKM3n22LVxy4fJ86A3 9g== Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0b-0016f401.pphosted.com (PPS) with ESMTPS id 3n8gerbenw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Mon, 23 Jan 2023 11:28:32 -0800 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 23 Jan 2023 11:28:30 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.42 via Frontend Transport; Mon, 23 Jan 2023 11:28:30 -0800 Received: from localhost.localdomain (unknown [10.110.150.250]) by maili.marvell.com (Postfix) with ESMTP id 0FAB03F7054; Mon, 23 Jan 2023 11:28:30 -0800 (PST) From: Piyush Malgujar To: , , , , , , , CC: , , Dhananjay Kangude , Piyush Malgujar Subject: [PATCH v2 1/5] drivers: mmc: sdhci-cadence: Reformat the code Date: Mon, 23 Jan 2023 11:27:31 -0800 Message-ID: <20230123192735.21136-2-pmalgujar@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230123192735.21136-1-pmalgujar@marvell.com> References: <20230123192735.21136-1-pmalgujar@marvell.com> MIME-Version: 1.0 X-Proofpoint-GUID: B__CLzQ7P6OslIHGUcfyql8Oex35AKcJ X-Proofpoint-ORIG-GUID: B__CLzQ7P6OslIHGUcfyql8Oex35AKcJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-23_12,2023-01-23_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Dhananjay Kangude Reformat the code so that further SD6 changes could be added and it could be isolated from SD4 related code. Also renamed functions accordingly. Signed-off-by: Dhananjay Kangude Co-developed-by: Jayanthi Annadurai Signed-off-by: Jayanthi Annadurai Signed-off-by: Piyush Malgujar --- drivers/mmc/host/sdhci-cadence.c | 165 ++++++++++++++++++++----------- 1 file changed, 110 insertions(+), 55 deletions(-) diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index 6f2de54a598773879bf339aae8450f63e1251509..cb108ff9abda32767b356bb572abdf8626746cd6 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -15,14 +15,14 @@ #include "sdhci-pltfm.h" -/* HRS - Host Register Set (specific to Cadence) */ +/* SD 4.0 Controller HRS - Host Register Set (specific to Cadence) */ #define SDHCI_CDNS_HRS04 0x10 /* PHY access port */ -#define SDHCI_CDNS_HRS04_ACK BIT(26) -#define SDHCI_CDNS_HRS04_RD BIT(25) -#define SDHCI_CDNS_HRS04_WR BIT(24) -#define SDHCI_CDNS_HRS04_RDATA GENMASK(23, 16) -#define SDHCI_CDNS_HRS04_WDATA GENMASK(15, 8) -#define SDHCI_CDNS_HRS04_ADDR GENMASK(5, 0) +#define SDHCI_CDNS_SD4_HRS04_ACK BIT(26) +#define SDHCI_CDNS_SD4_HRS04_RD BIT(25) +#define SDHCI_CDNS_SD4_HRS04_WR BIT(24) +#define SDHCI_CDNS_SD4_HRS04_RDATA GENMASK(23, 16) +#define SDHCI_CDNS_SD4_HRS04_WDATA GENMASK(15, 8) +#define SDHCI_CDNS_SD4_HRS04_ADDR GENMASK(5, 0) #define SDHCI_CDNS_HRS06 0x18 /* eMMC control */ #define SDHCI_CDNS_HRS06_TUNE_UP BIT(15) @@ -38,7 +38,7 @@ /* SRS - Slot Register Set (SDHCI-compatible) */ #define SDHCI_CDNS_SRS_BASE 0x200 -/* PHY */ +/* PHY registers for SD4 controller */ #define SDHCI_CDNS_PHY_DLY_SD_HS 0x00 #define SDHCI_CDNS_PHY_DLY_SD_DEFAULT 0x01 #define SDHCI_CDNS_PHY_DLY_UHS_SDR12 0x02 @@ -59,24 +59,43 @@ */ #define SDHCI_CDNS_MAX_TUNING_LOOP 40 -struct sdhci_cdns_phy_param { +struct sdhci_cdns_priv; + +struct sdhci_cdns_sd4_phy_param { u8 addr; u8 data; }; +struct sdhci_cdns_data { + int (*phy_init)(struct sdhci_cdns_priv *priv); + int (*set_tune_val)(struct sdhci_host *host, unsigned int val); +}; + +struct sdhci_cdns_sd4_phy { + unsigned int nr_phy_params; + struct sdhci_cdns_sd4_phy_param phy_params[]; +}; + struct sdhci_cdns_priv { void __iomem *hrs_addr; bool enhanced_strobe; - unsigned int nr_phy_params; - struct sdhci_cdns_phy_param phy_params[]; + const struct sdhci_cdns_data *cdns_data; + void *phy; }; -struct sdhci_cdns_phy_cfg { +struct sdhci_cdns_sd4_phy_cfg { const char *property; u8 addr; }; -static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = { +struct sdhci_cdns_of_data { + const struct sdhci_pltfm_data *pltfm_data; + const struct sdhci_cdns_data *cdns_data; + int (*phy_probe)(struct platform_device *pdev, + struct sdhci_cdns_priv *priv); +}; + +static const struct sdhci_cdns_sd4_phy_cfg sdhci_cdns_sd4_phy_cfgs[] = { { "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, }, { "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, }, { "cdns,phy-input-delay-sd-uhs-sdr12", SDHCI_CDNS_PHY_DLY_UHS_SDR12, }, @@ -90,80 +109,80 @@ static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = { { "cdns,phy-dll-delay-strobe", SDHCI_CDNS_PHY_DLY_STROBE, }, }; -static int sdhci_cdns_write_phy_reg(struct sdhci_cdns_priv *priv, - u8 addr, u8 data) +static int sdhci_cdns_sd4_write_phy_reg(struct sdhci_cdns_priv *priv, + u8 addr, u8 data) { void __iomem *reg = priv->hrs_addr + SDHCI_CDNS_HRS04; u32 tmp; int ret; - ret = readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_HRS04_ACK), + ret = readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_SD4_HRS04_ACK), 0, 10); if (ret) return ret; - tmp = FIELD_PREP(SDHCI_CDNS_HRS04_WDATA, data) | - FIELD_PREP(SDHCI_CDNS_HRS04_ADDR, addr); + tmp = FIELD_PREP(SDHCI_CDNS_SD4_HRS04_WDATA, data) | + FIELD_PREP(SDHCI_CDNS_SD4_HRS04_ADDR, addr); writel(tmp, reg); - tmp |= SDHCI_CDNS_HRS04_WR; + tmp |= SDHCI_CDNS_SD4_HRS04_WR; writel(tmp, reg); - ret = readl_poll_timeout(reg, tmp, tmp & SDHCI_CDNS_HRS04_ACK, 0, 10); + ret = readl_poll_timeout(reg, tmp, tmp & SDHCI_CDNS_SD4_HRS04_ACK, 0, 10); if (ret) return ret; - tmp &= ~SDHCI_CDNS_HRS04_WR; + tmp &= ~SDHCI_CDNS_SD4_HRS04_WR; writel(tmp, reg); - ret = readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_HRS04_ACK), + ret = readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_SD4_HRS04_ACK), 0, 10); return ret; } -static unsigned int sdhci_cdns_phy_param_count(struct device_node *np) +static unsigned int sdhci_cdns_sd4_phy_param_count(struct device_node *np) { unsigned int count = 0; int i; - for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) - if (of_property_read_bool(np, sdhci_cdns_phy_cfgs[i].property)) + for (i = 0; i < ARRAY_SIZE(sdhci_cdns_sd4_phy_cfgs); i++) + if (of_property_read_bool(np, sdhci_cdns_sd4_phy_cfgs[i].property)) count++; return count; } -static void sdhci_cdns_phy_param_parse(struct device_node *np, - struct sdhci_cdns_priv *priv) +static void sdhci_cdns_sd4_phy_param_parse(struct device_node *np, + struct sdhci_cdns_sd4_phy *phy) { - struct sdhci_cdns_phy_param *p = priv->phy_params; + struct sdhci_cdns_sd4_phy_param *p = phy->phy_params; u32 val; int ret, i; - for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) { - ret = of_property_read_u32(np, sdhci_cdns_phy_cfgs[i].property, + for (i = 0; i < ARRAY_SIZE(sdhci_cdns_sd4_phy_cfgs); i++) { + ret = of_property_read_u32(np, sdhci_cdns_sd4_phy_cfgs[i].property, &val); if (ret) continue; - p->addr = sdhci_cdns_phy_cfgs[i].addr; + p->addr = sdhci_cdns_sd4_phy_cfgs[i].addr; p->data = val; p++; } } -static int sdhci_cdns_phy_init(struct sdhci_cdns_priv *priv) +static int sdhci_cdns_sd4_phy_init(struct sdhci_cdns_priv *priv) { int ret, i; + struct sdhci_cdns_sd4_phy *phy = priv->phy; - for (i = 0; i < priv->nr_phy_params; i++) { - ret = sdhci_cdns_write_phy_reg(priv, priv->phy_params[i].addr, - priv->phy_params[i].data); + for (i = 0; i < phy->nr_phy_params; i++) { + ret = sdhci_cdns_sd4_write_phy_reg(priv, phy->phy_params[i].addr, + phy->phy_params[i].data); if (ret) return ret; } - return 0; } @@ -202,7 +221,28 @@ static u32 sdhci_cdns_get_emmc_mode(struct sdhci_cdns_priv *priv) return FIELD_GET(SDHCI_CDNS_HRS06_MODE, tmp); } -static int sdhci_cdns_set_tune_val(struct sdhci_host *host, unsigned int val) +static int sdhci_cdns_sd4_phy_probe(struct platform_device *pdev, + struct sdhci_cdns_priv *priv) +{ + unsigned int nr_phy_params; + struct sdhci_cdns_sd4_phy *phy; + struct device *dev = &pdev->dev; + + nr_phy_params = sdhci_cdns_sd4_phy_param_count(dev->of_node); + phy = devm_kzalloc(dev, struct_size(phy, phy_params, nr_phy_params), + GFP_KERNEL); + if (!phy) + return -ENOMEM; + + phy->nr_phy_params = nr_phy_params; + + sdhci_cdns_sd4_phy_param_parse(dev->of_node, phy); + priv->phy = phy; + + return 0; +} + +static int sdhci_cdns_sd4_set_tune_val(struct sdhci_host *host, unsigned int val) { struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); void __iomem *reg = priv->hrs_addr + SDHCI_CDNS_HRS06; @@ -255,7 +295,7 @@ static int sdhci_cdns_execute_tuning(struct sdhci_host *host, u32 opcode) return 0; for (i = 0; i < SDHCI_CDNS_MAX_TUNING_LOOP; i++) { - if (sdhci_cdns_set_tune_val(host, i) || + if (sdhci_cdns_sd4_set_tune_val(host, i) || mmc_send_tuning(host->mmc, opcode, NULL)) { /* bad */ cur_streak = 0; } else { /* good */ @@ -272,7 +312,7 @@ static int sdhci_cdns_execute_tuning(struct sdhci_host *host, u32 opcode) return -EIO; } - return sdhci_cdns_set_tune_val(host, end_of_streak - max_streak / 2); + return sdhci_cdns_sd4_set_tune_val(host, end_of_streak - max_streak / 2); } static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, @@ -309,7 +349,7 @@ static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, sdhci_set_uhs_signaling(host, timing); } -static const struct sdhci_ops sdhci_cdns_ops = { +static const struct sdhci_ops sdhci_cdns_sd4_ops = { .set_clock = sdhci_set_clock, .get_timeout_clock = sdhci_cdns_get_timeout_clock, .set_bus_width = sdhci_set_bus_width, @@ -319,12 +359,23 @@ static const struct sdhci_ops sdhci_cdns_ops = { }; static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = { - .ops = &sdhci_cdns_ops, + .ops = &sdhci_cdns_sd4_ops, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, }; -static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = { - .ops = &sdhci_cdns_ops, +static const struct sdhci_pltfm_data sdhci_cdns_sd4_pltfm_data = { + .ops = &sdhci_cdns_sd4_ops, +}; + +static const struct sdhci_cdns_data sdhci_cdns_sd4_data = { + .phy_init = sdhci_cdns_sd4_phy_init, + .set_tune_val = sdhci_cdns_sd4_set_tune_val, +}; + +static const struct sdhci_cdns_of_data sdhci_cdns_sd4_of_data = { + .pltfm_data = &sdhci_cdns_sd4_pltfm_data, + .cdns_data = &sdhci_cdns_sd4_data, + .phy_probe = sdhci_cdns_sd4_phy_probe, }; static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, @@ -350,11 +401,10 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, static int sdhci_cdns_probe(struct platform_device *pdev) { struct sdhci_host *host; - const struct sdhci_pltfm_data *data; + const struct sdhci_cdns_of_data *data; struct sdhci_pltfm_host *pltfm_host; struct sdhci_cdns_priv *priv; struct clk *clk; - unsigned int nr_phy_params; int ret; struct device *dev = &pdev->dev; static const u16 version = SDHCI_SPEC_400 << SDHCI_SPEC_VER_SHIFT; @@ -368,12 +418,12 @@ static int sdhci_cdns_probe(struct platform_device *pdev) return ret; data = of_device_get_match_data(dev); - if (!data) - data = &sdhci_cdns_pltfm_data; + if (!data) { + return PTR_ERR(clk); + goto disable_clk; + } - nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node); - host = sdhci_pltfm_init(pdev, data, - struct_size(priv, phy_params, nr_phy_params)); + host = sdhci_pltfm_init(pdev, data->pltfm_data, sizeof(*priv)); if (IS_ERR(host)) { ret = PTR_ERR(host); goto disable_clk; @@ -383,9 +433,9 @@ static int sdhci_cdns_probe(struct platform_device *pdev) pltfm_host->clk = clk; priv = sdhci_pltfm_priv(pltfm_host); - priv->nr_phy_params = nr_phy_params; priv->hrs_addr = host->ioaddr; priv->enhanced_strobe = false; + priv->cdns_data = data->cdns_data; host->ioaddr += SDHCI_CDNS_SRS_BASE; host->mmc_host_ops.hs400_enhanced_strobe = sdhci_cdns_hs400_enhanced_strobe; @@ -398,9 +448,11 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (ret) goto free; - sdhci_cdns_phy_param_parse(dev->of_node, priv); + ret = data->phy_probe(pdev, priv); + if (ret) + goto free; - ret = sdhci_cdns_phy_init(priv); + ret = priv->cdns_data->phy_init(priv); if (ret) goto free; @@ -429,7 +481,7 @@ static int sdhci_cdns_resume(struct device *dev) if (ret) return ret; - ret = sdhci_cdns_phy_init(priv); + ret = priv->cdns_data->phy_init(priv); if (ret) goto disable_clk; @@ -455,7 +507,10 @@ static const struct of_device_id sdhci_cdns_match[] = { .compatible = "socionext,uniphier-sd4hc", .data = &sdhci_cdns_uniphier_pltfm_data, }, - { .compatible = "cdns,sd4hc" }, + { + .compatible = "cdns,sd4hc", + .data = &sdhci_cdns_sd4_of_data, + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sdhci_cdns_match);