From patchwork Thu Feb 10 08:09:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kunihiko Hayashi X-Patchwork-Id: 12741526 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E0115C433F5 for ; Thu, 10 Feb 2022 08:12:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=PKIGKOG0W7M2awOfDUwn0g3rGL+FKFNOln2Uiv4k1fY=; b=GajnA2QtsLils3 KpyI4Qsy7dtjCq8m6lA4dwdBsZ7EjU5ZVGTZNfyjsIGoz+zUAf9NsqiZzB+MvKr7MslFwHLiA7yJ1 d1XKm04GJaBdvdd9ciolDK72Y2OBpQ5ByEvRDXGKE/3w/Vqf1et3pJ/X7SE3FDHCuBWBbTPDD+ZzA EF/OggggADCNF5Pf86h0nW/ZTCBq+NkElW9VbFYhSoO7DK0ZnkRUH742r8LLxhXRyt6ESuTtGNtrK gZoay311rYA/Tt8qRV/9/4tSFQr924C0bPlIBbt0ugMxKoNSIZ1NVhiB9wNv3VyZ18WTLKR0qzvW9 OBK9XGdKlJKr8ubtnTYw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nI4Xa-0030wF-Uc; Thu, 10 Feb 2022 08:10:59 +0000 Received: from mx.socionext.com ([202.248.49.38]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nI4Wk-0030d5-7I for linux-arm-kernel@lists.infradead.org; Thu, 10 Feb 2022 08:10:09 +0000 Received: from unknown (HELO iyokan2-ex.css.socionext.com) ([172.31.9.54]) by mx.socionext.com with ESMTP; 10 Feb 2022 17:10:05 +0900 Received: from mail.mfilter.local (m-filter-1 [10.213.24.61]) by iyokan2-ex.css.socionext.com (Postfix) with ESMTP id 5FAC3205D901; Thu, 10 Feb 2022 17:10:05 +0900 (JST) Received: from 172.31.9.51 (172.31.9.51) by m-FILTER with ESMTP; Thu, 10 Feb 2022 17:10:05 +0900 Received: from plum.e01.socionext.com (unknown [10.212.243.119]) by kinkan2.css.socionext.com (Postfix) with ESMTP id E9B9EC1E22; Thu, 10 Feb 2022 17:10:03 +0900 (JST) From: Kunihiko Hayashi To: Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Masami Hiramatsu Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Kunihiko Hayashi Subject: [PATCH v3 3/3] PCI: uniphier-ep: Add NX1 support Date: Thu, 10 Feb 2022 17:09:56 +0900 Message-Id: <1644480596-20037-4-git-send-email-hayashi.kunihiko@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1644480596-20037-1-git-send-email-hayashi.kunihiko@socionext.com> References: <1644480596-20037-1-git-send-email-hayashi.kunihiko@socionext.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220210_001006_450352_E9B067EB X-CRM114-Status: GOOD ( 17.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add basic support for UniPhier NX1 SoC as non-legacy SoC. This includes a compatible string, SoC-dependent data containing init() and wait() functions for the controller. Reviewed-by: Rob Herring Signed-off-by: Kunihiko Hayashi --- drivers/pci/controller/dwc/pcie-uniphier-ep.c | 81 +++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-uniphier-ep.c b/drivers/pci/controller/dwc/pcie-uniphier-ep.c index 6c035fc45aaa..4d0a587c0ba5 100644 --- a/drivers/pci/controller/dwc/pcie-uniphier-ep.c +++ b/drivers/pci/controller/dwc/pcie-uniphier-ep.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -31,6 +32,17 @@ #define PCL_RSTCTRL2 0x0024 #define PCL_RSTCTRL_PHY_RESET BIT(0) +#define PCL_PINCTRL0 0x002c +#define PCL_PERST_PLDN_REGEN BIT(12) +#define PCL_PERST_NOE_REGEN BIT(11) +#define PCL_PERST_OUT_REGEN BIT(8) +#define PCL_PERST_PLDN_REGVAL BIT(4) +#define PCL_PERST_NOE_REGVAL BIT(3) +#define PCL_PERST_OUT_REGVAL BIT(0) + +#define PCL_PIPEMON 0x0044 +#define PCL_PCLK_ALIVE BIT(15) + #define PCL_MODE 0x8000 #define PCL_MODE_REGEN BIT(8) #define PCL_MODE_REGVAL BIT(0) @@ -51,6 +63,9 @@ #define PCL_APP_INTX 0x8074 #define PCL_APP_INTX_SYS_INT BIT(0) +#define PCL_APP_PM0 0x8078 +#define PCL_SYS_AUX_PWR_DET BIT(8) + /* assertion time of INTx in usec */ #define PCL_INTX_WIDTH_USEC 30 @@ -123,6 +138,55 @@ static void uniphier_pcie_pro5_init_ep(struct uniphier_pcie_ep_priv *priv) msleep(100); } +static void uniphier_pcie_nx1_init_ep(struct uniphier_pcie_ep_priv *priv) +{ + u32 val; + + /* set EP mode */ + val = readl(priv->base + PCL_MODE); + val |= PCL_MODE_REGEN | PCL_MODE_REGVAL; + writel(val, priv->base + PCL_MODE); + + /* use auxiliary power detection */ + val = readl(priv->base + PCL_APP_PM0); + val |= PCL_SYS_AUX_PWR_DET; + writel(val, priv->base + PCL_APP_PM0); + + /* assert PERST# */ + val = readl(priv->base + PCL_PINCTRL0); + val &= ~(PCL_PERST_NOE_REGVAL | PCL_PERST_OUT_REGVAL + | PCL_PERST_PLDN_REGVAL); + val |= PCL_PERST_NOE_REGEN | PCL_PERST_OUT_REGEN + | PCL_PERST_PLDN_REGEN; + writel(val, priv->base + PCL_PINCTRL0); + + uniphier_pcie_ltssm_enable(priv, false); + + usleep_range(100000, 200000); + + /* deassert PERST# */ + val = readl(priv->base + PCL_PINCTRL0); + val |= PCL_PERST_OUT_REGVAL | PCL_PERST_OUT_REGEN; + writel(val, priv->base + PCL_PINCTRL0); +} + +static int uniphier_pcie_nx1_wait_ep(struct uniphier_pcie_ep_priv *priv) +{ + u32 status; + int ret; + + /* wait PIPE clock */ + ret = readl_poll_timeout(priv->base + PCL_PIPEMON, status, + status & PCL_PCLK_ALIVE, 100000, 1000000); + if (ret) { + dev_err(priv->pci.dev, + "Failed to initialize controller in EP mode\n"); + return ret; + } + + return 0; +} + static int uniphier_pcie_start_link(struct dw_pcie *pci) { struct uniphier_pcie_ep_priv *priv = to_uniphier_pcie(pci); @@ -353,11 +417,28 @@ static const struct uniphier_pcie_ep_soc_data uniphier_pro5_data = { }, }; +static const struct uniphier_pcie_ep_soc_data uniphier_nx1_data = { + .has_gio = false, + .init = uniphier_pcie_nx1_init_ep, + .wait = uniphier_pcie_nx1_wait_ep, + .features = { + .linkup_notifier = false, + .msi_capable = true, + .msix_capable = false, + .align = 1 << 12, + .bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4), + }, +}; + static const struct of_device_id uniphier_pcie_ep_match[] = { { .compatible = "socionext,uniphier-pro5-pcie-ep", .data = &uniphier_pro5_data, }, + { + .compatible = "socionext,uniphier-nx1-pcie-ep", + .data = &uniphier_nx1_data, + }, { /* sentinel */ }, };