From patchwork Tue Feb 16 18:19:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winkler, Tomas" X-Patchwork-Id: 1441053 X-Patchwork-Delegate: tudor.ambarus@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2001:8b0:10b:1231::1; helo=merlin.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=merlin.20170209 header.b=pbW65qp1; dkim-atps=neutral Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4Dg8SK41dVz9rx8 for ; Wed, 17 Feb 2021 05:21:37 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gAHhWrEb0qrZlC+I3D+Tx/+EmBy8cbloLALVJkbHKnU=; b=pbW65qp1ACGPN7I9G5U9b5Cix D52xoGxtCnRJw1238nPwsdYjfYlETODv2BeBW4rOMEX+n0rINIzti6RW7UmnTtYKYcpbSa5Jdip+i umupk0ZirPRAwpZ4nAUTS3u1deEi7EU1P6pcFhn42OkhvqwcKv5WzrRcQKserGFnk52BqtnmzCL+p 5mDluwlzAdDtylbO91FuVC5e4XmMAHpmVZJ0UODLb2PSSR5LxLCKZm0zEf/MIFmFCmYosTJNxIF6Q waaKpSzG21oHWEOl/3BJPteXx3tCX5TUaxeWR0Xbirf9vJ0RVIaNPxb4qq9OIJDVjTuM5YNPFSztI 7RRgCG3DQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lC4xf-00067B-Ma; Tue, 16 Feb 2021 18:20:35 +0000 Received: from mga01.intel.com ([192.55.52.88]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lC4xH-0005xx-H6 for linux-mtd@lists.infradead.org; Tue, 16 Feb 2021 18:20:15 +0000 IronPort-SDR: VwxfE+i0t6Jxjo6oA6Rr0yZpkrCONKiy3sfE3Sy4WcNoGO+8VCsSU5xdkSd747pMuKS0FNrl9C FEBMjpHXkkVg== X-IronPort-AV: E=McAfee;i="6000,8403,9897"; a="202169469" X-IronPort-AV: E=Sophos;i="5.81,184,1610438400"; d="scan'208";a="202169469" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2021 10:20:10 -0800 IronPort-SDR: jlWW7UNI/mwQEjhAhXCFqxGnlg37B6ErK7DFwQE6i3ppIvHbXcboRHv/XDwKoTpLIHYu1WZMJj YlUee6fuCsrQ== X-IronPort-AV: E=Sophos;i="5.81,184,1610438400"; d="scan'208";a="399609237" Received: from twinkler-lnx.jer.intel.com ([10.12.91.138]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2021 10:20:06 -0800 From: Tomas Winkler To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi Subject: [RFC PATCH 6/9] drm/i915/spi: spi register with mtd Date: Tue, 16 Feb 2021 20:19:22 +0200 Message-Id: <20210216181925.650082-7-tomas.winkler@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210216181925.650082-1-tomas.winkler@intel.com> References: <20210216181925.650082-1-tomas.winkler@intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210216_132011_890164_17F96092 X-CRM114-Status: GOOD ( 17.45 ) X-Spam-Score: -5.0 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [192.55.52.88 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [192.55.52.88 listed in wl.mailspike.net] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexander Usyskin , intel-gfx@lists.freedesktop.org, Lucas De Marchi , linux-mtd@lists.infradead.org, Tomas Winkler , Vitaly Lubart Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Register the on-die spi device with the mtd subsystem. Add mtd access stub functions. Cc: Rodrigo Vivi Cc: Lucas De Marchi Signed-off-by: Tomas Winkler --- drivers/gpu/drm/i915/spi/intel_spi_drv.c | 86 +++++++++++++++++++++++- 1 file changed, 85 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/spi/intel_spi_drv.c b/drivers/gpu/drm/i915/spi/intel_spi_drv.c index df6a461d520d..bdf58e14fd6b 100644 --- a/drivers/gpu/drm/i915/spi/intel_spi_drv.c +++ b/drivers/gpu/drm/i915/spi/intel_spi_drv.c @@ -15,7 +15,11 @@ #include #include +#include +#include + struct i915_spi { + struct mtd_info mtd; void __iomem *base; size_t size; unsigned int nregions; @@ -344,6 +348,73 @@ static int i915_spi_init(struct i915_spi *spi, struct device *device) return n; } +static int i915_spi_erase(struct mtd_info *mtd, struct erase_info *info) +{ + dev_err(&mtd->dev, "erasing %lld %lld\n", info->addr, info->len); + + return 0; +} + +static int i915_spi_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, u_char *buf) +{ + dev_err(&mtd->dev, "read %lld %zd\n", from, len); + + return 0; +} + +static int i915_spi_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + dev_err(&mtd->dev, "writing %lld %zd\n", to, len); + + return 0; +} + +static int i915_spi_init_mtd(struct i915_spi *spi, struct device *device, + unsigned int nparts) +{ + unsigned int i; + unsigned int n; + struct mtd_partition *parts = NULL; + int ret; + + dev_dbg(device, "registering with mtd\n"); + + spi->mtd.owner = THIS_MODULE; + spi->mtd.dev.parent = device; + spi->mtd.flags = MTD_CAP_NORFLASH | MTD_WRITEABLE; + spi->mtd.type = MTD_DATAFLASH; + spi->mtd.priv = spi; + spi->mtd._write = i915_spi_write; + spi->mtd._read = i915_spi_read; + spi->mtd._erase = i915_spi_erase; + spi->mtd.writesize = SZ_4; /* 4 bytes granularity */ + spi->mtd.erasesize = SZ_4K; /* 4K bytes granularity */ + spi->mtd.size = spi->size; + + parts = kcalloc(spi->nregions, sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + for (i = 0, n = 0; i < spi->nregions && n < nparts; i++) { + if (!spi->regions[i].is_readable) + continue; + parts[n].name = spi->regions[i].name; + parts[n].offset = spi->regions[i].offset; + parts[n].size = spi->regions[i].size; + if (!spi->regions[i].is_writable) + parts[n].mask_flags = MTD_WRITEABLE; + n++; + } + + ret = mtd_device_register(&spi->mtd, parts, n); + + kfree(parts); + + return ret; +} + static int i915_spi_probe(struct platform_device *platdev) { struct resource *bar; @@ -413,15 +484,28 @@ static int i915_spi_probe(struct platform_device *platdev) return -ENODEV; } + ret = i915_spi_init_mtd(spi, device, ret); + if (ret) { + dev_err(device, "i915-spi failed init mtd %d\n", ret); + return ret; + } + platform_set_drvdata(platdev, spi); dev_dbg(device, "i915-spi is bound\n"); - return 0; + return ret; } static int i915_spi_remove(struct platform_device *platdev) { + struct i915_spi *spi = platform_get_drvdata(platdev); + + if (!spi) + return 0; + + mtd_device_unregister(&spi->mtd); + platform_set_drvdata(platdev, NULL); return 0;