From patchwork Fri Mar 29 09:09:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13610405 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6F98B2C6AA for ; Fri, 29 Mar 2024 09:10:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711703412; cv=none; b=Ps7ja0V8wQng1XC+eiKc34I3+LLXhuXf9n0f8sLc7eIXHHyYgccaJNmpYu6TCwe9k1OI+edJ0IkvR4D7ysRO5BN6CmbeX0Wpgj6CiX8sRQijACuhXMtIh5fbw23gqRBwo/yH65iK35a2c8bx8CABSA93cGhWEsr6qy9Hn+84fLk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711703412; c=relaxed/simple; bh=RXLldZKLpPMu+MutiLKOGWj1dxASTXunfudattYEHEs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=q4Dn1Bl9lGNN6nfQE2RAI7/pS+kNhF8MtPdHUdjf7dhvEO0Ov0nbjR4Xo8yS1E5kPGC/TT3AVlEljd4TRSeRAv67+wDK15g1/bQSkXjeinFfWNWca4MO1jxM4ojPK/Z1XJSXboEhnq2o48N7ElVPRqSs5/nmqSqFEmPEIQwXZyo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lKI6quCu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lKI6quCu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27FD2C43390; Fri, 29 Mar 2024 09:10:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711703412; bh=RXLldZKLpPMu+MutiLKOGWj1dxASTXunfudattYEHEs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lKI6quCuJe1QmenF8fJF1NLI7QagbAaAlQPF1h3JDyt2nFUJByBEdlZa+/AhsnzFL b1Tk9TZzWeO5D9jAHDJT9wlo9YD5vtGGCsrTUUjz0wSZV09oCQLO7VyWvrepubRvcK mqk14eWHVHDiN6JrUQPI7n5wbFFCX2b/fkuWisgh/9yvATffAD78sHcj3pBjTZuOnU YlcIB3XRPKGcAbhaVY40YcYQwlioOAyb985mf74Oz4gDL+LY1k1AxxQOsGktm0DfN4 gaa+mQguBnU/jyoM3s2QCr8GMyq/dESFUw9GdH84ob9QWWfSdktvDNutG1y5WVsq7o y8vgMF8uJi7dA== From: Damien Le Moal To: Manivannan Sadhasivam , Kishon Vijay Abraham I , Shawn Lin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Subject: [PATCH 16/19] PCI: rockship-ep: Introduce rockchip_pcie_ep_stop() Date: Fri, 29 Mar 2024 18:09:42 +0900 Message-ID: <20240329090945.1097609-17-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240329090945.1097609-1-dlemoal@kernel.org> References: <20240329090945.1097609-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Define the EPC operation ->stop for the rockchip endpoint driver with the function rockchip_pcie_ep_stop(). This function disables link training and the controller configuration, as the reverse to what the start operation defined with rockchip_pcie_ep_start() does. Signed-off-by: Damien Le Moal --- drivers/pci/controller/pcie-rockchip-ep.c | 13 +++++++++++++ drivers/pci/controller/pcie-rockchip.h | 1 + 2 files changed, 14 insertions(+) diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 7df036098ecd..c126da07bf0c 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -470,6 +470,18 @@ static int rockchip_pcie_ep_start(struct pci_epc *epc) return 0; } +static void rockchip_pcie_ep_stop(struct pci_epc *epc) +{ + struct rockchip_pcie_ep *ep = epc_get_drvdata(epc); + struct rockchip_pcie *rockchip = &ep->rockchip; + + /* Stop link training and disable configuration */ + rockchip_pcie_write(rockchip, + PCIE_CLIENT_CONF_DISABLE | + PCIE_CLIENT_LINK_TRAIN_DISABLE, + PCIE_CLIENT_CONFIG); +} + static const struct pci_epc_features rockchip_pcie_epc_features = { .linkup_notifier = false, .msi_capable = true, @@ -494,6 +506,7 @@ static const struct pci_epc_ops rockchip_pcie_epc_ops = { .get_msi = rockchip_pcie_ep_get_msi, .raise_irq = rockchip_pcie_ep_raise_irq, .start = rockchip_pcie_ep_start, + .stop = rockchip_pcie_ep_stop, .get_features = rockchip_pcie_ep_get_features, }; diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h index 30398156095f..0263f158ee8d 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -32,6 +32,7 @@ #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001) #define PCIE_CLIENT_CONF_DISABLE HIWORD_UPDATE(0x0001, 0) #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002) +#define PCIE_CLIENT_LINK_TRAIN_DISABLE HIWORD_UPDATE(0x0002, 0) #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008) #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x)) #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)