From patchwork Fri Jan 7 00:13:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705950 X-Patchwork-Delegate: johannes@sipsolutions.net 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 1D33EC433EF for ; Fri, 7 Jan 2022 00:14:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343800AbiAGAOF (ORCPT ); Thu, 6 Jan 2022 19:14:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343798AbiAGAOD (ORCPT ); Thu, 6 Jan 2022 19:14:03 -0500 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93F52C061245; Thu, 6 Jan 2022 16:14:03 -0800 (PST) Received: by mail-pg1-x534.google.com with SMTP id f5so3968511pgk.12; Thu, 06 Jan 2022 16:14:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HAeEFO2qvIKP8NId8vfdtckbt5Y7Yjs9xWcmvkhoZSI=; b=mdWAqTR9fyhSi8Df7gWYtdt7BHU2fsxRj+WXjvkMximiEO56VSnNXZa7g8cw7sTj8v 6cArDCX5bwiLMqs9LzNjVITJyqHY+8LYvBdtnKQ5bSzHS9hI0/Gw9Tvga5smTjlJi8Ed f7r8lfJgtqBrr90aEeH7F3vhT/iFihgzY2X/0zzfWwexuKJwGCnbtKR1LnLuwP/gfw0g ZTyOvLaEXJxZPFgAh2b/iX0v769jenBmV+cpIjmDo1zWX31/E8CNoZMizEbghMXH5cp3 L8mH7aiPI5Wc1qLDVqiYgaMLHo91C862JzSO3d3dy5IuYGc/YHbPpaEdLaeF96aEdYpG 8CRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HAeEFO2qvIKP8NId8vfdtckbt5Y7Yjs9xWcmvkhoZSI=; b=GyxDo2UmhIi761unqONkC5bpHPZSXJ+wKi5YRUpb7zF7SyWHIQcC8nyDTEhY+NPxqI i/46VX6OQFXo+9IU7CXQwXSqeAuHyJABKbBUGw4G8DgzbDlmxumdbni5W859c7JJkIiQ hCGD9MDFb8FQRKFnxrPNh7Hkoo11e7Fra75LR+Ii//Av+pVW8w7QoQJRRfTYqeLmKzIu orxDGi/VQRxRhxGA+W2ySbOGtGzz5RvVqXvLz2gHVLBX+Hjkv08X1p2quIaT3Z1/HTAl kRuNAIG2XA7h6RTVVvAIZhJxVXQwq25Zuk/jlEAzLqNzf7aEObbySm7AAk4ETHK6owow R4rQ== X-Gm-Message-State: AOAM532+RQIv57fSLpnI6RlByNju7Vqv31GJbdpBDHdlmtnzXaP3cPJx gCKfVWBjhEwIeIkBOEpZqSo= X-Google-Smtp-Source: ABdhPJy5ireaJcIcq1W271fVNEhILDI0b0GWowJLlF8ZFeWfAlMMJ10PGn35Xapr3uV6erfEEaIAvA== X-Received: by 2002:a05:6a00:130a:b0:4bd:118:8071 with SMTP id j10-20020a056a00130a00b004bd01188071mr1376710pfu.28.1641514443085; Thu, 06 Jan 2022 16:14:03 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id y3sm3301906pju.37.2022.01.06.16.14.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jan 2022 16:14:02 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 1/9] mtd: rawnand: brcmnand: Assign soc as early as possible Date: Thu, 6 Jan 2022 16:13:20 -0800 Message-Id: <20220107001328.2233896-2-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org In order to key off the brcmnand_probe() code in subsequent changes depending upon ctlr->soc, assign that variable as early as possible, instead of much later when we have checked that it is non-NULL. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index f75929783b94..63080ae3aef1 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2998,6 +2998,7 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) dev_set_drvdata(dev, ctrl); ctrl->dev = dev; + ctrl->soc = soc; init_completion(&ctrl->done); init_completion(&ctrl->dma_done); @@ -3138,8 +3139,6 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) * interesting ways */ if (soc) { - ctrl->soc = soc; - ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0, DRV_NAME, ctrl); From patchwork Fri Jan 7 00:13:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705952 X-Patchwork-Delegate: johannes@sipsolutions.net 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 95980C433EF for ; Fri, 7 Jan 2022 00:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344000AbiAGAOL (ORCPT ); Thu, 6 Jan 2022 19:14:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343810AbiAGAOF (ORCPT ); Thu, 6 Jan 2022 19:14:05 -0500 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4440EC061201; Thu, 6 Jan 2022 16:14:05 -0800 (PST) Received: by mail-pf1-x434.google.com with SMTP id b22so3811338pfb.5; Thu, 06 Jan 2022 16:14:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rCIfzKgE4qJZwLWVi+wYkpGX0QTT3iPMxkFstpoGxDk=; b=TKzbHnJb6DTEAJ8lLBsC9+fFDeouNU26qG1XtCueUBDAeLtl0gdremzCEdkDCQS4Jk Tt8kcmGlqujPTWNTxF5nvn6uyqmP6YkYWhJgTGjPTAqHIG3nMGwpXpNQDM50AK7QBzYd ISCAGGCD3xfnrC9ax+fgL8YoLOK78pqK5b1Il27Sa4wAq+zf1Pc6uY6ZytR25cpXgNU3 89TMciv0FBV3PaY15T2TlSy386fuesF2PABEiO7MWijg37KvxFWm0DZ88elWPu0dBUFx +brrD47D+b7VVj4nYIpUB6rfHi8wNE3CEOLLFD8tVxniqNYYs+IW3mmQxANmZwpvoACp qIBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rCIfzKgE4qJZwLWVi+wYkpGX0QTT3iPMxkFstpoGxDk=; b=x8QVf5ktlZRkWCIUlj3ghn5IkdVCmgSpWM4n3n+ARBKNJg4EgWGkqcZmeSsh3bDfat Xtum65ngEwJ8HREP7PgMAHsAls6s0RjjPyJh6B5tdx5mFqCSYZmovzFdAwvJD3l+TsJ/ k7ctoJj7yNXuH6GQuSHnC30DFTDfQyztsNlB1DyNVSEtaj0wMFt3mH+e0c68ypl1W3Yk dQool0h68UmT4EwM2VJoA6NzEPmp6DARhkSQRaSAa6JcPqdI1k1lafhxdBuyzzHGG5Gt BMr4Pw6RJ0GNRSaJt6PxYCR2D8WnfmdwQ5IDnnhBG8mykbyMnYkiDgE2U7+sD3HWBkt0 K8cw== X-Gm-Message-State: AOAM531ITPKpmlGsRFiiPWuXouRqvnYnDiFkwcFThl5wTYPNzEZFjjMU FvfbqoAmoisw1tit8Qm06vg= X-Google-Smtp-Source: ABdhPJzYlUyiAsqMiAv9ClrDXHMNZueh7frDd9keoH8jwHgYCstpkMinx9N91VuQMKvxMOUdjKnmVw== X-Received: by 2002:a65:6aa7:: with SMTP id x7mr16752617pgu.273.1641514444759; Thu, 06 Jan 2022 16:14:04 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id y3sm3301906pju.37.2022.01.06.16.14.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jan 2022 16:14:04 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 2/9] mtd: rawnand: brcmnand: Allow SoC to provide I/O operations Date: Thu, 6 Jan 2022 16:13:21 -0800 Message-Id: <20220107001328.2233896-3-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Allow a brcmnand_soc instance to provide a custom set of I/O operations which we will require when using this driver on a BCMA bus which is not directly memory mapped I/O. Update the nand_{read,write}_reg accordingly to use the SoC operations if provided. To minimize the penalty on other SoCs which do support standard MMIO accesses, we use a static key which is disabled by default and gets enabled if a soc implementation does provide I/O operations. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 30 ++++++++++++++++++++++-- drivers/mtd/nand/raw/brcmnand/brcmnand.h | 29 +++++++++++++++++++++++ 2 files changed, 57 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 63080ae3aef1..9c3909c34dc2 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -207,6 +208,8 @@ enum { struct brcmnand_host; +static DEFINE_STATIC_KEY_FALSE(brcmnand_soc_has_ops_key); + struct brcmnand_controller { struct device *dev; struct nand_controller controller; @@ -592,15 +595,25 @@ enum { INTFC_CTLR_READY = BIT(31), }; +static inline bool brcmnand_non_mmio_ops(struct brcmnand_controller *ctrl) +{ + return static_branch_unlikely(&brcmnand_soc_has_ops_key); +} + static inline u32 nand_readreg(struct brcmnand_controller *ctrl, u32 offs) { + if (brcmnand_non_mmio_ops(ctrl)) + return brcmnand_soc_read(ctrl->soc, offs); return brcmnand_readl(ctrl->nand_base + offs); } static inline void nand_writereg(struct brcmnand_controller *ctrl, u32 offs, u32 val) { - brcmnand_writel(val, ctrl->nand_base + offs); + if (brcmnand_non_mmio_ops(ctrl)) + brcmnand_soc_write(ctrl->soc, val, offs); + else + brcmnand_writel(val, ctrl->nand_base + offs); } static int brcmnand_revision_init(struct brcmnand_controller *ctrl) @@ -766,13 +779,18 @@ static inline void brcmnand_rmw_reg(struct brcmnand_controller *ctrl, static inline u32 brcmnand_read_fc(struct brcmnand_controller *ctrl, int word) { + if (brcmnand_non_mmio_ops(ctrl)) + return brcmnand_soc_read(ctrl->soc, BRCMNAND_NON_MMIO_FC_ADDR); return __raw_readl(ctrl->nand_fc + word * 4); } static inline void brcmnand_write_fc(struct brcmnand_controller *ctrl, int word, u32 val) { - __raw_writel(val, ctrl->nand_fc + word * 4); + if (brcmnand_non_mmio_ops(ctrl)) + brcmnand_soc_write(ctrl->soc, val, BRCMNAND_NON_MMIO_FC_ADDR); + else + __raw_writel(val, ctrl->nand_fc + word * 4); } static inline void edu_writel(struct brcmnand_controller *ctrl, @@ -3000,6 +3018,12 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) ctrl->dev = dev; ctrl->soc = soc; + /* Enable the static key if the soc provides I/O operations indicating + * that a non-memory mapped IO access path must be used + */ + if (brcmnand_soc_has_ops(ctrl->soc)) + static_branch_enable(&brcmnand_soc_has_ops_key); + init_completion(&ctrl->done); init_completion(&ctrl->dma_done); init_completion(&ctrl->edu_done); @@ -3145,6 +3169,8 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) /* Enable interrupt */ ctrl->soc->ctlrdy_ack(ctrl->soc); ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true); + if (brcmnand_soc_has_ops(soc)) + static_branch_enable(&brcmnand_soc_has_ops_key); } else { /* Use standard interrupt infrastructure */ ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0, diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.h b/drivers/mtd/nand/raw/brcmnand/brcmnand.h index eb498fbe505e..f1f93d85f50d 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.h +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.h @@ -11,12 +11,25 @@ struct platform_device; struct dev_pm_ops; +struct brcmnand_io_ops; + +/* Special register offset constant to intercept a non-MMIO access + * to the flash cache register space. This is intentionally large + * not to overlap with an existing offset. + */ +#define BRCMNAND_NON_MMIO_FC_ADDR 0xffffffff struct brcmnand_soc { bool (*ctlrdy_ack)(struct brcmnand_soc *soc); void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en); void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare, bool is_param); + const struct brcmnand_io_ops *ops; +}; + +struct brcmnand_io_ops { + u32 (*read_reg)(struct brcmnand_soc *soc, u32 offset); + void (*write_reg)(struct brcmnand_soc *soc, u32 val, u32 offset); }; static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc, @@ -58,6 +71,22 @@ static inline void brcmnand_writel(u32 val, void __iomem *addr) writel_relaxed(val, addr); } +static inline bool brcmnand_soc_has_ops(struct brcmnand_soc *soc) +{ + return soc && soc->ops && soc->ops->read_reg && soc->ops->write_reg; +} + +static inline u32 brcmnand_soc_read(struct brcmnand_soc *soc, u32 offset) +{ + return soc->ops->read_reg(soc, offset); +} + +static inline void brcmnand_soc_write(struct brcmnand_soc *soc, u32 val, + u32 offset) +{ + soc->ops->write_reg(soc, val, offset); +} + int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc); int brcmnand_remove(struct platform_device *pdev); From patchwork Fri Jan 7 00:13:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705951 X-Patchwork-Delegate: johannes@sipsolutions.net 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 ACF8EC4332F for ; Fri, 7 Jan 2022 00:14:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343914AbiAGAOJ (ORCPT ); Thu, 6 Jan 2022 19:14:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343860AbiAGAOH (ORCPT ); Thu, 6 Jan 2022 19:14:07 -0500 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E71F4C061212; 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Thu, 06 Jan 2022 16:14:06 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id y3sm3301906pju.37.2022.01.06.16.14.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jan 2022 16:14:06 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 3/9] mtd: rawnand: brcmnand: Avoid pdev in brcmnand_init_cs() Date: Thu, 6 Jan 2022 16:13:22 -0800 Message-Id: <20220107001328.2233896-4-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org In preparation for encapsulation more of what the loop calling brcmnand_init_cs() does, avoid using platform_device when it is the device behind platform_device that we are using for printing errors. No functional change. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 9c3909c34dc2..fc14765f7d23 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2771,7 +2771,7 @@ static const struct nand_controller_ops brcmnand_controller_ops = { static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) { struct brcmnand_controller *ctrl = host->ctrl; - struct platform_device *pdev = host->pdev; + struct device *dev = ctrl->dev; struct mtd_info *mtd; struct nand_chip *chip; int ret; @@ -2779,7 +2779,7 @@ static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) ret = of_property_read_u32(dn, "reg", &host->cs); if (ret) { - dev_err(&pdev->dev, "can't get chip-select\n"); + dev_err(dev, "can't get chip-select\n"); return -ENXIO; } @@ -2788,13 +2788,13 @@ static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) nand_set_flash_node(chip, dn); nand_set_controller_data(chip, host); - mtd->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "brcmnand.%d", + mtd->name = devm_kasprintf(dev, GFP_KERNEL, "brcmnand.%d", host->cs); if (!mtd->name) return -ENOMEM; mtd->owner = THIS_MODULE; - mtd->dev.parent = &pdev->dev; + mtd->dev.parent = dev; chip->legacy.cmd_ctrl = brcmnand_cmd_ctrl; chip->legacy.cmdfunc = brcmnand_cmdfunc; From patchwork Fri Jan 7 00:13:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705953 X-Patchwork-Delegate: johannes@sipsolutions.net 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 2AA17C4332F for ; Fri, 7 Jan 2022 00:14:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344065AbiAGAON (ORCPT ); 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Thu, 06 Jan 2022 16:14:07 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 4/9] mtd: rawnand: brcmnand: Move OF operations out of brcmnand_init_cs() Date: Thu, 6 Jan 2022 16:13:23 -0800 Message-Id: <20220107001328.2233896-5-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org In order to initialize a given chip select object for use by the brcmnand driver, move all of the Device Tree specific routines outside of brcmnand_init_cs() in order to make it usable in a platform data configuration which will be necessary for supporting BCMA chips. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index fc14765f7d23..eb3f96489f83 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2768,7 +2768,7 @@ static const struct nand_controller_ops brcmnand_controller_ops = { .attach_chip = brcmnand_attach_chip, }; -static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) +static int brcmnand_init_cs(struct brcmnand_host *host) { struct brcmnand_controller *ctrl = host->ctrl; struct device *dev = ctrl->dev; @@ -2777,16 +2777,9 @@ static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) int ret; u16 cfg_offs; - ret = of_property_read_u32(dn, "reg", &host->cs); - if (ret) { - dev_err(dev, "can't get chip-select\n"); - return -ENXIO; - } - mtd = nand_to_mtd(&host->chip); chip = &host->chip; - nand_set_flash_node(chip, dn); nand_set_controller_data(chip, host); mtd->name = devm_kasprintf(dev, GFP_KERNEL, "brcmnand.%d", host->cs); @@ -3195,7 +3188,16 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) host->pdev = pdev; host->ctrl = ctrl; - ret = brcmnand_init_cs(host, child); + ret = of_property_read_u32(child, "reg", &host->cs); + if (ret) { + dev_err(dev, "can't get chip-select\n"); + devm_kfree(dev, host); + continue; + } + + nand_set_flash_node(&host->chip, child); + + ret = brcmnand_init_cs(host); if (ret) { devm_kfree(dev, host); continue; /* Try all chip-selects */ From patchwork Fri Jan 7 00:13:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705954 X-Patchwork-Delegate: johannes@sipsolutions.net 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 B0FFDC433FE for ; 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Thu, 06 Jan 2022 16:14:09 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 5/9] mtd: rawnand: brcmnand: Allow working without interrupts Date: Thu, 6 Jan 2022 16:13:24 -0800 Message-Id: <20220107001328.2233896-6-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org The BCMA devices include the brcmnand controller but they do not wire up any interrupt line, allow the main interrupt to be optional and update the completion path to also check for the lack of an interrupt line. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 54 +++++++++++------------- 1 file changed, 24 insertions(+), 30 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index eb3f96489f83..08e2acde5133 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -216,7 +216,7 @@ struct brcmnand_controller { void __iomem *nand_base; void __iomem *nand_fc; /* flash cache */ void __iomem *flash_dma_base; - unsigned int irq; + int irq; unsigned int dma_irq; int nand_version; @@ -1610,7 +1610,7 @@ static bool brcmstb_nand_wait_for_completion(struct nand_chip *chip) bool err = false; int sts; - if (mtd->oops_panic_write) { + if (mtd->oops_panic_write || ctrl->irq < 0) { /* switch to interrupt polling and PIO mode */ disable_ctrl_irqs(ctrl); sts = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, @@ -3144,35 +3144,29 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) } /* IRQ */ - ctrl->irq = platform_get_irq(pdev, 0); - if ((int)ctrl->irq < 0) { - dev_err(dev, "no IRQ defined\n"); - ret = -ENODEV; - goto err; - } - - /* - * Some SoCs integrate this controller (e.g., its interrupt bits) in - * interesting ways - */ - if (soc) { - ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0, - DRV_NAME, ctrl); + ctrl->irq = platform_get_irq_optional(pdev, 0); + if (ctrl->irq > 0) { + /* + * Some SoCs integrate this controller (e.g., its interrupt bits) in + * interesting ways + */ + if (soc) { + ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0, + DRV_NAME, ctrl); - /* Enable interrupt */ - ctrl->soc->ctlrdy_ack(ctrl->soc); - ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true); - if (brcmnand_soc_has_ops(soc)) - static_branch_enable(&brcmnand_soc_has_ops_key); - } else { - /* Use standard interrupt infrastructure */ - ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0, - DRV_NAME, ctrl); - } - if (ret < 0) { - dev_err(dev, "can't allocate IRQ %d: error %d\n", - ctrl->irq, ret); - goto err; + /* Enable interrupt */ + ctrl->soc->ctlrdy_ack(ctrl->soc); + ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true); + } else { + /* Use standard interrupt infrastructure */ + ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0, + DRV_NAME, ctrl); + } + if (ret < 0) { + dev_err(dev, "can't allocate IRQ %d: error %d\n", + ctrl->irq, ret); + goto err; + } } for_each_available_child_of_node(dn, child) { From patchwork Fri Jan 7 00:13:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705955 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 31C8FC4332F for ; Fri, 7 Jan 2022 00:14:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344090AbiAGAOT (ORCPT ); Thu, 6 Jan 2022 19:14:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344032AbiAGAON (ORCPT ); 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Thu, 06 Jan 2022 16:14:11 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 6/9] mtd: rawnand: brcmnand: Add platform data structure for BCMA Date: Thu, 6 Jan 2022 16:13:25 -0800 Message-Id: <20220107001328.2233896-7-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Update the BCMA's chipcommon nand flash driver to detect which chip-select is used and pass that information via platform data to the brcmnand driver. Make sure that the brcmnand platform data structure is always at the beginning of the platform data of the "nflash" device created by BCMA to allow brcmnand to safely de-reference it. Signed-off-by: Florian Fainelli --- MAINTAINERS | 1 + drivers/bcma/driver_chipcommon_nflash.c | 20 +++++++++++++++++++- include/linux/bcma/bcma_driver_chipcommon.h | 5 +++++ include/linux/platform_data/brcmnand.h | 12 ++++++++++++ 4 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 include/linux/platform_data/brcmnand.h diff --git a/MAINTAINERS b/MAINTAINERS index dd36acc87ce6..404f3eb8ff18 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3966,6 +3966,7 @@ L: linux-mtd@lists.infradead.org L: bcm-kernel-feedback-list@broadcom.com S: Maintained F: drivers/mtd/nand/raw/brcmnand/ +F: include/linux/platform_data/brcmnand.h BROADCOM STB PCIE DRIVER M: Jim Quinlan diff --git a/drivers/bcma/driver_chipcommon_nflash.c b/drivers/bcma/driver_chipcommon_nflash.c index d4f699aef8c4..a1a814750b4a 100644 --- a/drivers/bcma/driver_chipcommon_nflash.c +++ b/drivers/bcma/driver_chipcommon_nflash.c @@ -7,18 +7,28 @@ #include "bcma_private.h" +#include #include +#include #include +/* Alternate NAND controller driver name in order to allow both bcm47xxnflash + * and bcma_brcmnand to be built into the same kernel image. + */ +static const char *bcma_nflash_alt_name = "bcma_brcmnand"; + struct platform_device bcma_nflash_dev = { .name = "bcma_nflash", .num_resources = 0, }; +static const char *probes[] = { "bcm47xxpart", NULL }; + /* Initialize NAND flash access */ int bcma_nflash_init(struct bcma_drv_cc *cc) { struct bcma_bus *bus = cc->core->bus; + u32 reg; if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 && cc->core->id.rev != 38) { @@ -33,8 +43,16 @@ int bcma_nflash_init(struct bcma_drv_cc *cc) cc->nflash.present = true; if (cc->core->id.rev == 38 && - (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) + (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) { cc->nflash.boot = true; + /* Determine the chip select that is being used */ + reg = bcma_cc_read32(cc, BCMA_CC_NAND_CS_NAND_SELECT) & 0xff; + cc->nflash.brcmnand_info.chip_select = ffs(reg) - 1; + cc->nflash.brcmnand_info.part_probe_types = probes; + cc->nflash.brcmnand_info.ecc_stepsize = 512; + cc->nflash.brcmnand_info.ecc_strength = 1; + bcma_nflash_dev.name = bcma_nflash_alt_name; + } /* Prepare platform device, but don't register it yet. It's too early, * malloc (required by device_private_init) is not available yet. */ diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h index d35b9206096d..e3314f746bfa 100644 --- a/include/linux/bcma/bcma_driver_chipcommon.h +++ b/include/linux/bcma/bcma_driver_chipcommon.h @@ -3,6 +3,7 @@ #define LINUX_BCMA_DRIVER_CC_H_ #include +#include #include /** ChipCommon core registers. **/ @@ -599,6 +600,10 @@ struct bcma_sflash { #ifdef CONFIG_BCMA_NFLASH struct bcma_nflash { + /* Must be the fist member for the brcmnand driver to + * de-reference that structure. + */ + struct brcmnand_platform_data brcmnand_info; bool present; bool boot; /* This is the flash the SoC boots from */ }; diff --git a/include/linux/platform_data/brcmnand.h b/include/linux/platform_data/brcmnand.h new file mode 100644 index 000000000000..8b8777985dce --- /dev/null +++ b/include/linux/platform_data/brcmnand.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef BRCMNAND_PLAT_DATA_H +#define BRCMNAND_PLAT_DATA_H + +struct brcmnand_platform_data { + int chip_select; + const char * const *part_probe_types; + unsigned int ecc_stepsize; + unsigned int ecc_strength; +}; + +#endif /* BRCMNAND_PLAT_DATA_H */ From patchwork Fri Jan 7 00:13:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705958 X-Patchwork-Delegate: johannes@sipsolutions.net 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 4B87FC433F5 for ; Fri, 7 Jan 2022 00:14:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344570AbiAGAO3 (ORCPT ); Thu, 6 Jan 2022 19:14:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344155AbiAGAOR (ORCPT ); Thu, 6 Jan 2022 19:14:17 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C249C0611FF; 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Thu, 06 Jan 2022 16:14:13 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id y3sm3301906pju.37.2022.01.06.16.14.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jan 2022 16:14:12 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 7/9] mtd: rawnand: brcmnand: Allow platform data instantation Date: Thu, 6 Jan 2022 16:13:26 -0800 Message-Id: <20220107001328.2233896-8-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Make use of the recently refactored code in brcmnand_init_cs() and derive the chip-select from the platform data that is supplied. Update the various code paths to avoid relying on possibly non-existent resources, too. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 45 ++++++++++++++++++------ 1 file changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 08e2acde5133..eab19df152f3 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -2768,7 +2769,8 @@ static const struct nand_controller_ops brcmnand_controller_ops = { .attach_chip = brcmnand_attach_chip, }; -static int brcmnand_init_cs(struct brcmnand_host *host) +static int brcmnand_init_cs(struct brcmnand_host *host, + const char * const *part_probe_types) { struct brcmnand_controller *ctrl = host->ctrl; struct device *dev = ctrl->dev; @@ -2821,7 +2823,7 @@ static int brcmnand_init_cs(struct brcmnand_host *host) if (ret) return ret; - ret = mtd_device_register(mtd, NULL, 0); + ret = mtd_device_parse_register(mtd, part_probe_types, NULL, NULL, 0); if (ret) nand_cleanup(chip); @@ -2990,17 +2992,15 @@ static int brcmnand_edu_setup(struct platform_device *pdev) int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) { + struct brcmnand_platform_data *pd = dev_get_platdata(&pdev->dev); struct device *dev = &pdev->dev; struct device_node *dn = dev->of_node, *child; struct brcmnand_controller *ctrl; + struct brcmnand_host *host; struct resource *res; int ret; - /* We only support device-tree instantiation */ - if (!dn) - return -ENODEV; - - if (!of_match_node(brcmnand_of_match, dn)) + if (dn && !of_match_node(brcmnand_of_match, dn)) return -ENODEV; ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); @@ -3027,7 +3027,7 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) /* NAND register range */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ctrl->nand_base = devm_ioremap_resource(dev, res); - if (IS_ERR(ctrl->nand_base)) + if (IS_ERR(ctrl->nand_base) && !brcmnand_soc_has_ops(soc)) return PTR_ERR(ctrl->nand_base); /* Enable clock before using NAND registers */ @@ -3171,7 +3171,6 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) for_each_available_child_of_node(dn, child) { if (of_device_is_compatible(child, "brcm,nandcs")) { - struct brcmnand_host *host; host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); if (!host) { @@ -3191,7 +3190,7 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) nand_set_flash_node(&host->chip, child); - ret = brcmnand_init_cs(host); + ret = brcmnand_init_cs(host, NULL); if (ret) { devm_kfree(dev, host); continue; /* Try all chip-selects */ @@ -3201,6 +3200,32 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) } } + if (!list_empty(&ctrl->host_list)) + return 0; + + if (!pd) { + ret = -ENODEV; + goto err; + } + + /* If we got there we must have been probing via platform data */ + host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); + if (!host) { + ret = -ENOMEM; + goto err; + } + host->pdev = pdev; + host->ctrl = ctrl; + host->cs = pd->chip_select; + host->chip.ecc.size = pd->ecc_stepsize; + host->chip.ecc.strength = pd->ecc_strength; + + ret = brcmnand_init_cs(host, pd->part_probe_types); + if (ret) + goto err; + + list_add_tail(&host->node, &ctrl->host_list); + /* No chip-selects could initialize properly */ if (list_empty(&ctrl->host_list)) { ret = -ENODEV; From patchwork Fri Jan 7 00:13:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705957 X-Patchwork-Delegate: johannes@sipsolutions.net 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 94654C433EF for ; Fri, 7 Jan 2022 00:14:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344106AbiAGAO1 (ORCPT ); Thu, 6 Jan 2022 19:14:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344026AbiAGAOR (ORCPT ); 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Thu, 06 Jan 2022 16:14:14 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 8/9] mtd: rawnand: brcmnand: BCMA controller uses command shift of 0 Date: Thu, 6 Jan 2022 16:13:27 -0800 Message-Id: <20220107001328.2233896-9-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org For some odd and unexplained reason the BCMA NAND controller, albeit revision 3.4 uses a command shift of 0 instead of 24 as it should be, quirk that. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index eab19df152f3..4759303ece7c 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -916,6 +916,12 @@ static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val) static inline int brcmnand_cmd_shift(struct brcmnand_controller *ctrl) { + /* Kludge for the BCMA-based NAND controller which does not actually + * shift the command + */ + if (ctrl->nand_version == 0x0304 && brcmnand_non_mmio_ops(ctrl)) + return 0; + if (ctrl->nand_version < 0x0602) return 24; return 0; From patchwork Fri Jan 7 00:13:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12705956 X-Patchwork-Delegate: johannes@sipsolutions.net 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 EB6C7C433FE for ; Fri, 7 Jan 2022 00:14:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344209AbiAGAOW (ORCPT ); Thu, 6 Jan 2022 19:14:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344181AbiAGAOR (ORCPT ); Thu, 6 Jan 2022 19:14:17 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0735DC061212; Thu, 6 Jan 2022 16:14:17 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id c14-20020a17090a674e00b001b31e16749cso8810704pjm.4; Thu, 06 Jan 2022 16:14:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0JfEaUNg0Xt4oVlLObtxcOjbJGRKPvqxT7EiLG9OykY=; b=lR6tnw5zs/2ApxbtnTHbaOWvWG0yuYFbiR0iC6+8xo/HeIXnEROqYLmIxxBOXLlvG6 WGuEF6QRb6GJVjUnyIdXVYgfbX5x5rrUB2qZje+jzY1/modKLbYwHLKdYN0H7ZI85zJ/ NNhVVu7PAWbhdPQAwhw1V0VIYMGurfQ3aeYurYZZkcwjMKVpu2yFMyCmjTUy8smHyryO KdREHzxgtYmGxSazCZ0z1gPkKIoEcZO464X9wvF6Hb06az25d+uI7nZ9+AN1khL+tiDH lyZZKbrTpTw2zXrkXXOHV2INMJYQm4Ct0U4TuJycDYaIFw56dtoN3I8ve8X8iXiPjorD TdbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0JfEaUNg0Xt4oVlLObtxcOjbJGRKPvqxT7EiLG9OykY=; b=EuW8LK1TijFpl9kMFbD0PukdcNUsJHRRvDbt1DdczW9rA16Ue7zElcadZ+GRJCC0IP DWcj7h0cTg+zZpmtqJk2nHBEgoBP8UW7fNuYcgotNnvpf8xNzXYzJcSpv7BhQ9jZJ/IE nZYH8rF2V4qPmGvje4BmVpOGG6Hq2osfgoFBmSk7WhRkefRT0X3ZNsuSUF720W68nBA4 oBix/LFlF8xV27rSt7DbL3dgzq5BZexykbYlxIvzbGD495e/dxm1EiEKrszmVSYYOIpp 6aJU/Jzw6XlfS87c/pywg1oExyQkF64pW5472UrRlshc2rt3ujVNY1KOBSy9FJ9fPiU2 2tlA== X-Gm-Message-State: AOAM531lE58fGn4w+iWwAtfcQhOjSP8VJQbO73NSOMg1JGqFs793Yfhh +GRGbOiZaP55XZ8pJmjKPTY= X-Google-Smtp-Source: ABdhPJxOhtba/MGe2W2rsdY2/aX2nqLFrXr9vWtfLZ8RKbOT8mCYdcfA9WnOng3cBfE+73KZBdv9vA== X-Received: by 2002:a17:902:8693:b0:148:a2e7:fb5a with SMTP id g19-20020a170902869300b00148a2e7fb5amr61224878plo.155.1641514456544; Thu, 06 Jan 2022 16:14:16 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id y3sm3301906pju.37.2022.01.06.16.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jan 2022 16:14:16 -0800 (PST) From: Florian Fainelli To: linux-mtd@lists.infradead.org Cc: Florian Fainelli , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Brian Norris , Kamal Dasu , Arnd Bergmann , Cai Huoqing , Colin Ian King , linux-kernel@vger.kernel.org (open list), linux-wireless@vger.kernel.org (open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)), bcm-kernel-feedback-list@broadcom.com (open list:BROADCOM STB NAND FLASH DRIVER) Subject: [PATCH v2 9/9] mtd: rawnand: brcmnand: Add BCMA shim Date: Thu, 6 Jan 2022 16:13:28 -0800 Message-Id: <20220107001328.2233896-10-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220107001328.2233896-1-f.fainelli@gmail.com> References: <20220107001328.2233896-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Add a BCMA shim to allow us to register the brcmnand driver using the BCMA bus which provides indirect memory mapped access to SoC registers. There are a number of registers that need to be byte swapped because they are natively big endian, coming directly from the NAND chip, and there is no bus interface unlike the iProc or STB platforms that performs the byte swapping for us. Signed-off-by: Florian Fainelli --- drivers/mtd/nand/raw/Kconfig | 13 +++ drivers/mtd/nand/raw/brcmnand/Makefile | 2 + drivers/mtd/nand/raw/brcmnand/bcma_nand.c | 132 ++++++++++++++++++++++ drivers/mtd/nand/raw/brcmnand/brcmnand.c | 4 + 4 files changed, 151 insertions(+) create mode 100644 drivers/mtd/nand/raw/brcmnand/bcma_nand.c diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 0a45d3c6c15b..7f385ac6e443 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -208,6 +208,19 @@ config MTD_NAND_BRCMNAND originally designed for Set-Top Box but is used on various BCM7xxx, BCM3xxx, BCM63xxx, iProc/Cygnus and more. +if MTD_NAND_BRCMNAND + +config MTD_NAND_BRCMNAND_BCMA + tristate "Broadcom BCMA NAND controller" + depends on BCMA_NFLASH + depends on BCMA + help + Enables the BRCMNAND controller over BCMA on BCM47186/BCM5358 SoCs. + The glue driver will take care of performing the low-level I/O + operations to interface the BRCMNAND controller over the BCMA bus. + +endif # MTD_NAND_BRCMNAND + config MTD_NAND_BCM47XXNFLASH tristate "BCM4706 BCMA NAND controller" depends on BCMA_NFLASH diff --git a/drivers/mtd/nand/raw/brcmnand/Makefile b/drivers/mtd/nand/raw/brcmnand/Makefile index 195b845e48b8..16dc7254200e 100644 --- a/drivers/mtd/nand/raw/brcmnand/Makefile +++ b/drivers/mtd/nand/raw/brcmnand/Makefile @@ -6,3 +6,5 @@ obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm63138_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm6368_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmstb_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand.o + +obj-$(CONFIG_MTD_NAND_BRCMNAND_BCMA) += bcma_nand.o diff --git a/drivers/mtd/nand/raw/brcmnand/bcma_nand.c b/drivers/mtd/nand/raw/brcmnand/bcma_nand.c new file mode 100644 index 000000000000..d7c62988c452 --- /dev/null +++ b/drivers/mtd/nand/raw/brcmnand/bcma_nand.c @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright © 2021 Broadcom + */ +#include +#include +#include +#include +#include + +#include "brcmnand.h" + +struct brcmnand_bcma_soc { + struct brcmnand_soc soc; + struct bcma_drv_cc *cc; +}; + +static inline bool brcmnand_bcma_needs_swapping(u32 offset) +{ + switch (offset) { + case BCMA_CC_NAND_SPARE_RD0: + case BCMA_CC_NAND_SPARE_RD4: + case BCMA_CC_NAND_SPARE_RD8: + case BCMA_CC_NAND_SPARE_RD12: + case BCMA_CC_NAND_SPARE_WR0: + case BCMA_CC_NAND_SPARE_WR4: + case BCMA_CC_NAND_SPARE_WR8: + case BCMA_CC_NAND_SPARE_WR12: + case BCMA_CC_NAND_DEVID: + case BCMA_CC_NAND_DEVID_X: + case BCMA_CC_NAND_SPARE_RD16: + case BCMA_CC_NAND_SPARE_RD20: + case BCMA_CC_NAND_SPARE_RD24: + case BCMA_CC_NAND_SPARE_RD28: + return true; + } + + return false; +} + +static inline struct brcmnand_bcma_soc *to_bcma_soc(struct brcmnand_soc *soc) +{ + return container_of(soc, struct brcmnand_bcma_soc, soc); +} + +static u32 brcmnand_bcma_read_reg(struct brcmnand_soc *soc, u32 offset) +{ + struct brcmnand_bcma_soc *sc = to_bcma_soc(soc); + u32 val; + + /* Offset into the NAND block and deal with the flash cache separately */ + if (offset == BRCMNAND_NON_MMIO_FC_ADDR) + offset = BCMA_CC_NAND_CACHE_DATA; + else + offset += BCMA_CC_NAND_REVISION; + + val = bcma_cc_read32(sc->cc, offset); + + /* Swap if necessary */ + if (brcmnand_bcma_needs_swapping(offset)) + val = be32_to_cpu(val); + return val; +} + +static void brcmnand_bcma_write_reg(struct brcmnand_soc *soc, u32 val, + u32 offset) +{ + struct brcmnand_bcma_soc *sc = to_bcma_soc(soc); + + /* Offset into the NAND block */ + if (offset == BRCMNAND_NON_MMIO_FC_ADDR) + offset = BCMA_CC_NAND_CACHE_DATA; + else + offset += BCMA_CC_NAND_REVISION; + + /* Swap if necessary */ + if (brcmnand_bcma_needs_swapping(offset)) + val = cpu_to_be32(val); + + bcma_cc_write32(sc->cc, offset, val); +} + +static struct brcmnand_io_ops brcmnand_bcma_io_ops = { + .read_reg = brcmnand_bcma_read_reg, + .write_reg = brcmnand_bcma_write_reg, +}; + +static void brcmnand_bcma_prepare_data_bus(struct brcmnand_soc *soc, bool prepare, + bool is_param) +{ + struct brcmnand_bcma_soc *sc = to_bcma_soc(soc); + + /* Reset the cache address to ensure we are already accessing the + * beginning of a sub-page. + */ + bcma_cc_write32(sc->cc, BCMA_CC_NAND_CACHE_ADDR, 0); +} + +static int brcmnand_bcma_nand_probe(struct platform_device *pdev) +{ + struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev); + struct brcmnand_bcma_soc *soc; + + soc = devm_kzalloc(&pdev->dev, sizeof(*soc), GFP_KERNEL); + if (!soc) + return -ENOMEM; + + soc->cc = container_of(nflash, struct bcma_drv_cc, nflash); + soc->soc.prepare_data_bus = brcmnand_bcma_prepare_data_bus; + soc->soc.ops = &brcmnand_bcma_io_ops; + + if (soc->cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) { + dev_err(&pdev->dev, "Use bcm47xxnflash for 4706!\n"); + return -ENODEV; + } + + return brcmnand_probe(pdev, &soc->soc); +} + +static struct platform_driver brcmnand_bcma_nand_driver = { + .probe = brcmnand_bcma_nand_probe, + .remove = brcmnand_remove, + .driver = { + .name = "bcma_brcmnand", + .pm = &brcmnand_pm_ops, + } +}; +module_platform_driver(brcmnand_bcma_nand_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Broadcom"); +MODULE_DESCRIPTION("NAND controller driver glue for BCMA chips"); diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 4759303ece7c..c412f79b81db 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -598,7 +598,11 @@ enum { static inline bool brcmnand_non_mmio_ops(struct brcmnand_controller *ctrl) { +#if IS_ENABLED(CONFIG_MTD_NAND_BRCMNAND_BCMA) return static_branch_unlikely(&brcmnand_soc_has_ops_key); +#else + return false; +#endif } static inline u32 nand_readreg(struct brcmnand_controller *ctrl, u32 offs)