From c681c93067b8484381653dee0fc79a6d81be7050 Mon Sep 17 00:00:00 2001 From: Honghui Zhang Date: Thu, 10 Aug 2017 14:34:56 +0800 Subject: [PATCH] PCI: mediatek: Add a structure to abstract the controller generations Introduce a structure "mtk_pcie_soc" to abstract the differences between controller generations, and the .startup() hook is used to encapsulate some SoC-dependent related setting. In doing so, the common code which will be reused by future chips. Signed-off-by: Ryder Lee Signed-off-by: Honghui Zhang Signed-off-by: Bjorn Helgaas --- drivers/pci/host/pcie-mediatek.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c index 7d1b7cdfb022..01caa98d4171 100644 --- a/drivers/pci/host/pcie-mediatek.c +++ b/drivers/pci/host/pcie-mediatek.c @@ -64,6 +64,18 @@ #define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16)) #define PCIE_FC_CREDIT_VAL(x) ((x) << 16) +struct mtk_pcie_port; + +/** + * struct mtk_pcie_soc - differentiate between host generations + * @ops: pointer to configuration access functions + * @startup: pointer to controller setting functions + */ +struct mtk_pcie_soc { + struct pci_ops *ops; + int (*startup)(struct mtk_pcie_port *port); +}; + /** * struct mtk_pcie_port - PCIe port information * @base: IO mapped register base @@ -97,6 +109,7 @@ struct mtk_pcie_port { * @busn: bus range * @offset: IO / Memory offset * @ports: pointer to PCIe port information + * @soc: pointer to SoC-dependent operations */ struct mtk_pcie { struct device *dev; @@ -112,6 +125,7 @@ struct mtk_pcie { resource_size_t io; } offset; struct list_head ports; + const struct mtk_pcie_soc *soc; }; static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie) @@ -229,7 +243,8 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port) static void mtk_pcie_enable_port(struct mtk_pcie_port *port) { - struct device *dev = port->pcie->dev; + struct mtk_pcie *pcie = port->pcie; + struct device *dev = pcie->dev; int err; err = clk_prepare_enable(port->sys_ck); @@ -247,7 +262,7 @@ static void mtk_pcie_enable_port(struct mtk_pcie_port *port) goto err_phy_on; } - if (!mtk_pcie_startup_port(port)) + if (!pcie->soc->startup(port)) return; dev_info(dev, "Port%d link down\n", port->slot); @@ -472,7 +487,7 @@ static int mtk_pcie_register_host(struct pci_host_bridge *host) host->busnr = pcie->busn.start; host->dev.parent = pcie->dev; - host->ops = &mtk_pcie_ops; + host->ops = pcie->soc->ops; host->map_irq = of_irq_parse_and_map_pci; host->swizzle_irq = pci_common_swizzle; @@ -505,6 +520,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) pcie = pci_host_bridge_priv(host); pcie->dev = dev; + pcie->soc = of_device_get_match_data(dev); platform_set_drvdata(pdev, pcie); INIT_LIST_HEAD(&pcie->ports); @@ -529,9 +545,14 @@ put_resources: return err; } +static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { + .ops = &mtk_pcie_ops, + .startup = mtk_pcie_startup_port, +}; + static const struct of_device_id mtk_pcie_ids[] = { - { .compatible = "mediatek,mt7623-pcie"}, - { .compatible = "mediatek,mt2701-pcie"}, + { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 }, + { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 }, {}, }; -- 2.20.1