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While the controller resembles that of iMX8MP, the PHY differs significantly. Notably, there's a distinction between PCI bus addresses and CPU addresses. Introduce IMX_PCIE_FLAG_CPU_ADDR_FIXUP in drvdata::flags to indicate driver need the cpu_addr_fixup() callback to facilitate CPU address to PCI bus address conversion according to "range" property. Signed-off-by: Richard Zhu Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 18c133f5a56fc..d2533d889d120 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -66,6 +66,7 @@ enum imx_pcie_variants { IMX8MQ, IMX8MM, IMX8MP, + IMX8Q, IMX95, IMX8MQ_EP, IMX8MM_EP, @@ -81,6 +82,7 @@ enum imx_pcie_variants { #define IMX_PCIE_FLAG_HAS_PHY_RESET BIT(5) #define IMX_PCIE_FLAG_HAS_SERDES BIT(6) #define IMX_PCIE_FLAG_SUPPORT_64BIT BIT(7) +#define IMX_PCIE_FLAG_CPU_ADDR_FIXUP BIT(8) #define imx_check_flag(pci, val) (pci->drvdata->flags & val) @@ -1012,6 +1014,22 @@ static void imx_pcie_host_exit(struct dw_pcie_rp *pp) regulator_disable(imx_pcie->vpcie); } +static u64 imx_pcie_cpu_addr_fixup(struct dw_pcie *pcie, u64 cpu_addr) +{ + struct imx_pcie *imx_pcie = to_imx_pcie(pcie); + struct dw_pcie_rp *pp = &pcie->pp; + struct resource_entry *entry; + unsigned int offset; + + if (!(imx_pcie->drvdata->flags & IMX_PCIE_FLAG_CPU_ADDR_FIXUP)) + return cpu_addr; + + entry = resource_list_first_type(&pp->bridge->windows, IORESOURCE_MEM); + offset = entry->offset; + + return (cpu_addr - offset); +} + static const struct dw_pcie_host_ops imx_pcie_host_ops = { .init = imx_pcie_host_init, .deinit = imx_pcie_host_exit, @@ -1020,6 +1038,7 @@ static const struct dw_pcie_host_ops imx_pcie_host_ops = { static const struct dw_pcie_ops dw_pcie_ops = { .start_link = imx_pcie_start_link, .stop_link = imx_pcie_stop_link, + .cpu_addr_fixup = imx_pcie_cpu_addr_fixup, }; static void imx_pcie_ep_init(struct dw_pcie_ep *ep) @@ -1449,6 +1468,13 @@ static int imx_pcie_probe(struct platform_device *pdev) if (ret < 0) return ret; + if (imx_check_flag(imx_pcie, IMX_PCIE_FLAG_CPU_ADDR_FIXUP)) { + if (!resource_list_first_type(&pci->pp.bridge->windows, IORESOURCE_MEM)) { + dw_pcie_host_deinit(&pci->pp); + return dev_err_probe(dev, -EINVAL, "DTS Miss PCI memory range"); + } + } + if (pci_msi_enabled()) { u8 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI); @@ -1473,6 +1499,7 @@ static const char * const imx6q_clks[] = {"pcie_bus", "pcie", "pcie_phy"}; static const char * const imx8mm_clks[] = {"pcie_bus", "pcie", "pcie_aux"}; static const char * const imx8mq_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"}; static const char * const imx6sx_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_inbound_axi"}; +static const char * const imx8q_clks[] = {"mstr", "slv", "dbi"}; static const struct imx_pcie_drvdata drvdata[] = { [IMX6Q] = { @@ -1576,6 +1603,13 @@ static const struct imx_pcie_drvdata drvdata[] = { .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE, .set_ref_clk = imx8mm_pcie_set_ref_clk, }, + [IMX8Q] = { + .variant = IMX8Q, + .flags = IMX_PCIE_FLAG_HAS_PHYDRV | + IMX_PCIE_FLAG_CPU_ADDR_FIXUP, + .clk_names = imx8q_clks, + .clks_cnt = ARRAY_SIZE(imx8q_clks), + }, [IMX95] = { .variant = IMX95, .flags = IMX_PCIE_FLAG_HAS_SERDES, @@ -1653,6 +1687,7 @@ static const struct of_device_id imx_pcie_of_match[] = { { .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], }, { .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], }, { .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], }, + { .compatible = "fsl,imx8q-pcie", .data = &drvdata[IMX8Q], }, { .compatible = "fsl,imx95-pcie", .data = &drvdata[IMX95], }, { .compatible = "fsl,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], }, { .compatible = "fsl,imx8mm-pcie-ep", .data = &drvdata[IMX8MM_EP], },