From patchwork Fri Jun 5 21:26:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Quinlan X-Patchwork-Id: 11590531 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0B303159A for ; Fri, 5 Jun 2020 21:28:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DC3D02065C for ; Fri, 5 Jun 2020 21:28:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lNQgQ5RC"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="v0+4fki/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC3D02065C Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=+dmjRmMp0KUeF2rjeBUabfcvhHr/tjg9rOfGYdN2aG0=; b=lNQgQ5RCEE53Crh+Mt5uF7bz4s 0OQLNTiD2RxAid3ky09IFltVsjJ7bSYQQeAAYrg6d+lZSRPWj9iYkBJ5irM0hhwLvOI7Bci98sbZH M4TisymB2rHUSfaoXThI+1IGx45S0qlTra02qWtoYE5Dh34gLm40LtV1q4H3DDwZIbMv7q3OKUOOV WwDrFe7QhXtHH00+H4tuxN+XxNjcCcNmCh2FQESazHPBQoUOYy4jnMOCXzT8PiD1kykyWtgW7PYLy CPHk86PweOeluLlv0F6GcUezXtXvqdys+gE2KJzpOoup1trh75Hv6tpFBCfkkwJlayaRHLj5V3bfB szhhYbmw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jhJss-0003OR-W7; Fri, 05 Jun 2020 21:28:15 +0000 Received: from rnd-relay.smtp.broadcom.com ([192.19.229.170]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jhJs5-0002jy-HR; Fri, 05 Jun 2020 21:27:28 +0000 Received: from mail-irv-17.broadcom.com (mail-irv-17.lvn.broadcom.net [10.75.242.48]) by rnd-relay.smtp.broadcom.com (Postfix) with ESMTP id 9370F30D7E5; Fri, 5 Jun 2020 14:27:24 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com 9370F30D7E5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1591392444; bh=msforknhSPdfZTMqq1P4dps5nzFDkH/vRnYPWKP4EY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v0+4fki/VJMYJkIY5iL1DSdhNaXe2SQkr2DBuybpkGPvkv/STHmnNy1XImxeX5N/D ikHiwlEyELqT3lmvMQWANr4xZQ0bdwUyWBOJae+OzoL8/6geI+jzr88SToNXalRifg WSUvBkpVtjA5421K4Mo9s2/BDSqlOzD4FMJbUph8= Received: from stbsrv-and-01.and.broadcom.net (stbsrv-and-01.and.broadcom.net [10.28.16.211]) by mail-irv-17.broadcom.com (Postfix) with ESMTP id 0F43014008B; Fri, 5 Jun 2020 14:27:22 -0700 (PDT) From: Jim Quinlan To: linux-pci@vger.kernel.org, Christoph Hellwig , Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Subject: [PATCH v4 06/12] PCI: brcmstb: Add bcm7278 PERST support Date: Fri, 5 Jun 2020 17:26:46 -0400 Message-Id: <20200605212706.7361-7-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200605212706.7361-1-james.quinlan@broadcom.com> References: <20200605212706.7361-1-james.quinlan@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200605_142725_601650_40B9E714 X-CRM114-Status: UNSURE ( 9.30 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [192.19.229.170 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Lorenzo Pieralisi , open list , Florian Fainelli , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , Jim Quinlan , Bjorn Helgaas , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Jim Quinlan The PERST bit was moved to a different register in 7278-type STB chips. In addition, the polarity of the bit was also changed; for other chips writing a 1 specified assert; for 7278-type chips, writing a 0 specifies assert. Signal-wise, PERST is an asserted-low signal. Signed-off-by: Jim Quinlan Acked-by: Florian Fainelli --- drivers/pci/controller/pcie-brcmstb.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 69d49d675b4a..532ea9c9cf89 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -81,6 +81,7 @@ #define PCIE_MISC_PCIE_CTRL 0x4064 #define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1 +#define PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_MASK 0x4 #define PCIE_MISC_PCIE_STATUS 0x4068 #define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK 0x80 @@ -686,9 +687,17 @@ static inline void brcm_pcie_perst_set(struct brcm_pcie *pcie, u32 val) { u32 tmp; - tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie)); - u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_PERST_MASK); - writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie)); + if (pcie->type == BCM7278) { + /* Perst bit has moved and assert value is 0 */ + tmp = readl(pcie->base + PCIE_MISC_PCIE_CTRL); + u32p_replace_bits(&tmp, + !val, PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_MASK); + writel(tmp, pcie->base + PCIE_MISC_PCIE_CTRL); + } else { + tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie)); + u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_PERST_MASK); + writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie)); + } } static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,