From patchwork Tue Apr 30 12:01:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13648871 X-Patchwork-Delegate: manivannanece23@gmail.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 B688013D289; Tue, 30 Apr 2024 12:02:35 +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=1714478555; cv=none; b=cxLnnZYHsofDrIcLYzsmRPxmh8zzD/hF3Uv6v5qUG01f6f/tlbmXq/WFmTx2LJmVawSb7PTN1TxvIjauOVF6QbQDXa7haPIngbI0t2m+uw74JeIkNxfJqHPKnvC5lIBXvEOwBNNUZO9wW9d8TF3lekbO6lcODvpAMV85C2G3gWM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714478555; c=relaxed/simple; bh=T2rCqCvWqvq9XcLiSqbgVvv2b58vZBopULJOizrdRIQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ExANvJ4S4SgysR3inE91M+q1qhzAbz0BeeM1Al18tUURhnROyAHa8cwOmqeGMtkLK7I5+uPal6b4vG7xtHSc6JIlV+8uKfbH6vxOE9PT7hM1bkdlSG1ewqa8LBGoDG9QVYGZkOd82m/zN02HNbeAKJPgsq+UpOHYB4iZrk51M5M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nyemq8Xg; 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="nyemq8Xg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73288C2BBFC; Tue, 30 Apr 2024 12:02:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714478555; bh=T2rCqCvWqvq9XcLiSqbgVvv2b58vZBopULJOizrdRIQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=nyemq8Xg8LIN3Ba/QYifHGONhN4tpetFkTFyAEgIAVm9VDMuqGkB76eq0VNxYPIy7 KR3g+l+SSemiE+gw8tf0Zl1uC4t5bfIg/qdzlkS/2/0SLi/yMfRnvhsd4rC6eu3rK4 PRaqHI0TrBNgPRbYi5f0uaZwL6FKG/vGXhKRwcpGH90WT4adSL1eA1b8aeFDn6k0Hd yW/BRXiR1wRYQV5v/7G6clFzzGN+Hx82AUSxc5jbVuVUcDtO2bsiQbZCPhA6QAPs4w m8BJCQTdy4+pe+am1mGHL7lNIWQ4i6gbzqm6Ux3T98A1g/AHTFKZ44uOlL9iqymCwH Hnen86+2P9msA== From: Niklas Cassel Date: Tue, 30 Apr 2024 14:01:06 +0200 Subject: [PATCH v2 09/14] 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: <20240430-rockchip-pcie-ep-v1-v2-9-a0f5ee2a77b6@kernel.org> References: <20240430-rockchip-pcie-ep-v1-v2-0-a0f5ee2a77b6@kernel.org> In-Reply-To: <20240430-rockchip-pcie-ep-v1-v2-0-a0f5ee2a77b6@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=4417; i=cassel@kernel.org; h=from:subject:message-id; bh=T2rCqCvWqvq9XcLiSqbgVvv2b58vZBopULJOizrdRIQ=; b=owGbwMvMwCV2MsVw8cxjvkWMp9WSGNIM7m6wPnf3Tq/wPr/nMTLG/+oW6U3lYt9Y+2jZ9A0ah ryRj7c1dZSyMIhxMciKKbL4/nDZX9ztPuW44h0bmDmsTCBDGLg4BWAixVcYGe4Kqdx/8lzVqZBV 9PrSSQLLZG+I+jX9efai5miAD+Nk4ccM/2x+pv1I+FTNoXz43xb5lW32DFc59A7Mcm93cDlQ8nB HCg8A 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 patch in a much less intrusive way, which makes the follup-up patches much easier to review. No functional change intended. Signed-off-by: Niklas Cassel --- drivers/pci/controller/dwc/pcie-dw-rockchip.c | 72 +++++++++++++++++++++------ 1 file changed, 57 insertions(+), 15 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c index 4023fd86176f..f985539fb00a 100644 --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c @@ -58,6 +58,11 @@ struct rockchip_pcie { struct gpio_desc *rst_gpio; struct regulator *vpcie3v3; struct irq_domain *irq_domain; + enum dw_pcie_device_mode mode; +}; + +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 +286,41 @@ 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; + + if (!IS_ENABLED(CONFIG_PCIE_ROCKCHIP_DW_HOST)) + return -ENODEV; + + /* 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; + enum dw_pcie_device_mode mode; int ret; + data = of_device_get_match_data(dev); + if (!data) + return -EINVAL; + + mode = (enum dw_pcie_device_mode)data->mode; + rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL); if (!rockchip) return -ENOMEM; @@ -303,9 +329,7 @@ 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->mode = mode; ret = rockchip_pcie_resource_get(pdev, rockchip); if (ret) @@ -342,10 +366,21 @@ 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 (rockchip->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", rockchip->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 +391,15 @@ static int rockchip_pcie_probe(struct platform_device *pdev) return ret; } +static const struct rockchip_pcie_of_data rockchip_pcie_rc_of_data = { + .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, + }, {}, };