From patchwork Wed May 8 13:13:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13658727 X-Patchwork-Delegate: kw@linux.com 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 452BD59158; Wed, 8 May 2024 13:14:18 +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=1715174058; cv=none; b=hiDvUU8u5lL+ncs3OfaoAtdXcsu3bySEsOV1UQt4AOZogBH3hSogW7fZRtX7g87pl4w8jNw6qWOG+WiDedCfqVnr9CmnMFPziMHnzkCvMIpjCgmUTH86q+SsYqK+/9qzdpgk4s8OQ12N0TilLc6FGsmkL5iy5scRq0JspiEUO+Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715174058; c=relaxed/simple; bh=59kFpa6ALdPCnEsQbbSRjoY4cwSouyaqunrcUlCZnSs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sD6dEtK88mtSM9K6/4y9VmF7iel0ntLNXC55mqIGM8vOsH/X0BVZ+FL2Sra7GLCtENyvaRqIdzv3pytPd9pE03jkuPnZUztJReJTG53V0l7z0PBqz64A0CqREKiYQ8eN2TbErfALJEgrO47bJvluj1mWTvrfs064sMxW5yRbLmg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LJNvrddb; 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="LJNvrddb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61C96C113CC; Wed, 8 May 2024 13:14:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715174058; bh=59kFpa6ALdPCnEsQbbSRjoY4cwSouyaqunrcUlCZnSs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LJNvrddbW3WjR20oW37Vi2I9PS/0PPHvqa3ludqYvGCvJj9QSdSehfXcKcQrb37my BFICMtH8A9SwCbJbXyVYGHB7ejDXCCydvqhSI1gA81YHt37CeUvUqUmlf7dn5d0jUS wtZNUgv7U1WeLQy48EZqSoxiHGYEGWCI1tm1LPO3UqwsCPGYZ2R4Vla0Itu2Jp7OEf GJUybLzOiaeLYdmtbuxf/tTButy9lfhyOJl0O5vGbf+1NYDx/Dhrp7YW9GqzIERBAq Q2EoZxDVYXfDGJ7EF9AGysQdtRV499MsRMcvgrvr/lP/JFVUvZ48mhAIIpv0VU081k g2sPF45FbJ4bA== From: Niklas Cassel Date: Wed, 08 May 2024 15:13:40 +0200 Subject: [PATCH v3 09/13] PCI: dw-rockchip: Refactor the driver to prepare for EP mode Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240508-rockchip-pcie-ep-v1-v3-9-1748e202b084@kernel.org> References: <20240508-rockchip-pcie-ep-v1-v3-0-1748e202b084@kernel.org> In-Reply-To: <20240508-rockchip-pcie-ep-v1-v3-0-1748e202b084@kernel.org> To: Jingoo Han , Manivannan Sadhasivam , Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Niklas Cassel , Kishon Vijay Abraham I , Arnd Bergmann , Damien Le Moal , Jon Lin , Shawn Lin , Simon Xue Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4770; i=cassel@kernel.org; h=from:subject:message-id; bh=59kFpa6ALdPCnEsQbbSRjoY4cwSouyaqunrcUlCZnSs=; b=kA0DAAoWyWQxo5nGTXIByyZiAGY7en+h5bfUWCxs6quy4NoAF8nr8mDGpzKJVKFiuiMqzeYKi Yh1BAAWCgAdFiEETfhEv3OLR5THIdw8yWQxo5nGTXIFAmY7en8ACgkQyWQxo5nGTXLE4AD+KKy9 bsBL4dMFp1VbGzwBKAeqcY5dYaWBSVM91slqJC8BAIz6tZANn/Vjwd1IvbTtcYVn1socgobMoEd xwTTdqt4N X-Developer-Key: i=cassel@kernel.org; a=openpgp; fpr=5ADE635C0E631CBBD5BE065A352FE6582ED9B5DA This refactors the driver to prepare for EP mode. Add of-match data to the existing compatible, and explicitly define it as DW_PCIE_RC_TYPE. This way, we will be able to add EP mode in a follow-up commit in a much less intrusive way, which makes the follup-up commit much easier to review. No functional change intended. Signed-off-by: Niklas Cassel --- drivers/pci/controller/dwc/pcie-dw-rockchip.c | 84 +++++++++++++++++++-------- 1 file changed, 60 insertions(+), 24 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c index 2a70326cc0bc..3c2e012e3e91 100644 --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c @@ -49,15 +49,20 @@ #define PCIE_LTSSM_STATUS_MASK GENMASK(5, 0) struct rockchip_pcie { - struct dw_pcie pci; - void __iomem *apb_base; - struct phy *phy; - struct clk_bulk_data *clks; - unsigned int clk_cnt; - struct reset_control *rst; - struct gpio_desc *rst_gpio; - struct regulator *vpcie3v3; - struct irq_domain *irq_domain; + struct dw_pcie pci; + void __iomem *apb_base; + struct phy *phy; + struct clk_bulk_data *clks; + unsigned int clk_cnt; + struct reset_control *rst; + struct gpio_desc *rst_gpio; + struct regulator *vpcie3v3; + struct irq_domain *irq_domain; + const struct rockchip_pcie_of_data *data; +}; + +struct rockchip_pcie_of_data { + enum dw_pcie_device_mode mode; }; static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip, u32 reg) @@ -195,7 +200,6 @@ static int rockchip_pcie_host_init(struct dw_pcie_rp *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct rockchip_pcie *rockchip = to_rockchip_pcie(pci); struct device *dev = rockchip->pci.dev; - u32 val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE); int irq, ret; irq = of_irq_get_byname(dev->of_node, "legacy"); @@ -209,12 +213,6 @@ static int rockchip_pcie_host_init(struct dw_pcie_rp *pp) irq_set_chained_handler_and_data(irq, rockchip_pcie_intx_handler, rockchip); - /* LTSSM enable control mode */ - rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL); - - rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_RC_MODE, - PCIE_CLIENT_GENERAL_CONTROL); - return 0; } @@ -288,13 +286,35 @@ static const struct dw_pcie_ops dw_pcie_ops = { .start_link = rockchip_pcie_start_link, }; +static int rockchip_pcie_configure_rc(struct rockchip_pcie *rockchip) +{ + struct dw_pcie_rp *pp; + u32 val; + + /* LTSSM enable control mode */ + val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE); + rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL); + + rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_RC_MODE, + PCIE_CLIENT_GENERAL_CONTROL); + + pp = &rockchip->pci.pp; + pp->ops = &rockchip_pcie_host_ops; + + return dw_pcie_host_init(pp); +} + static int rockchip_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct rockchip_pcie *rockchip; - struct dw_pcie_rp *pp; + const struct rockchip_pcie_of_data *data; int ret; + data = of_device_get_match_data(dev); + if (!data) + return -EINVAL; + rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL); if (!rockchip) return -ENOMEM; @@ -303,9 +323,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev) rockchip->pci.dev = dev; rockchip->pci.ops = &dw_pcie_ops; - - pp = &rockchip->pci.pp; - pp->ops = &rockchip_pcie_host_ops; + rockchip->data = data; ret = rockchip_pcie_resource_get(pdev, rockchip); if (ret) @@ -342,10 +360,21 @@ static int rockchip_pcie_probe(struct platform_device *pdev) if (ret) goto deinit_phy; - ret = dw_pcie_host_init(pp); - if (!ret) - return 0; + switch (data->mode) { + case DW_PCIE_RC_TYPE: + ret = rockchip_pcie_configure_rc(rockchip); + if (ret) + goto deinit_clk; + break; + default: + dev_err(dev, "INVALID device type %d\n", data->mode); + ret = -EINVAL; + goto deinit_clk; + } + + return 0; +deinit_clk: clk_bulk_disable_unprepare(rockchip->clk_cnt, rockchip->clks); deinit_phy: rockchip_pcie_phy_deinit(rockchip); @@ -356,8 +385,15 @@ static int rockchip_pcie_probe(struct platform_device *pdev) return ret; } +static const struct rockchip_pcie_of_data rockchip_pcie_rc_of_data_rk3568 = { + .mode = DW_PCIE_RC_TYPE, +}; + static const struct of_device_id rockchip_pcie_of_match[] = { - { .compatible = "rockchip,rk3568-pcie", }, + { + .compatible = "rockchip,rk3568-pcie", + .data = &rockchip_pcie_rc_of_data_rk3568, + }, {}, };