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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add iMX95 EP support and add 64bit address support. Internal bus bridge for PCI support 64bit dma address in iMX95. Hence, call dma_set_mask_and_coherent() to set 64 bit DMA mask. Reviewed-by: Manivannan Sadhasivam Signed-off-by: Frank Li --- Notes: Change from v8 to v9 - update fixme comments - update BAR1 comments - Add mani's review tag Change from v7 to v8 - Update commit message - Using Fixme - Update clks_cnts by ARRAY_SIZE Change from v4 to v7 - none Change from v3 to v4 - change align to 4k for imx95 Change from v1 to v3 - new patches at v3 drivers/pci/controller/dwc/pci-imx6.c | 47 +++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index bbaa45c08323b..7889318f6555a 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -75,6 +75,7 @@ enum imx6_pcie_variants { IMX8MQ_EP, IMX8MM_EP, IMX8MP_EP, + IMX95_EP, }; #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0) @@ -84,6 +85,7 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_HAS_APP_RESET BIT(4) #define IMX6_PCIE_FLAG_HAS_PHY_RESET BIT(5) #define IMX6_PCIE_FLAG_HAS_SERDES BIT(6) +#define IMX6_PCIE_FLAG_SUPPORT_64BIT BIT(7) #define imx6_check_flag(pci, val) (pci->drvdata->flags & val) @@ -616,6 +618,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) break; case IMX7D: case IMX95: + case IMX95_EP: break; case IMX8MM: case IMX8MM_EP: @@ -1050,6 +1053,23 @@ static const struct pci_epc_features imx8m_pcie_epc_features = { .align = SZ_64K, }; +/* + * BAR# | Default BAR enable | Default BAR Type | Default BAR Size | BAR Sizing Scheme + * ================================================================================================ + * BAR0 | Enable | 64-bit | 1 MB | Programmable Size + * BAR1 | Disable | 32-bit | 64 KB | Fixed Size + * BAR1 should be disabled if BAR0 is 64bit. + * BAR2 | Enable | 32-bit | 1 MB | Programmable Size + * BAR3 | Enable | 32-bit | 64 KB | Programmable Size + * BAR4 | Enable | 32-bit | 1M | Programmable Size + * BAR5 | Enable | 32-bit | 64 KB | Programmable Size + */ +static const struct pci_epc_features imx95_pcie_epc_features = { + .msi_capable = true, + .bar_fixed_size[1] = SZ_64K, + .align = SZ_4K, +}; + static const struct pci_epc_features* imx6_pcie_ep_get_features(struct dw_pcie_ep *ep) { @@ -1092,6 +1112,15 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie, pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset; + /* + * FIXME: Ideally, dbi2 base address should come from DT. But since only IMX95 is defining + * "dbi2" in DT, "dbi_base2" is set to NULL here for that platform alone so that the DWC + * core code can fetch that from DT. But once all platform DTs were fixed, this and the + * above "dbi_base2" setting should be removed. + */ + if (imx6_pcie->drvdata->variant == IMX95_EP) + pci->dbi_base2 = NULL; + ret = dw_pcie_ep_init(ep); if (ret) { dev_err(dev, "failed to initialize endpoint\n"); @@ -1345,6 +1374,9 @@ static int imx6_pcie_probe(struct platform_device *pdev) "unable to find iomuxc registers\n"); } + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_SUPPORT_64BIT)) + dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + /* Grab PCIe PHY Tx Settings */ if (of_property_read_u32(node, "fsl,tx-deemph-gen1", &imx6_pcie->tx_deemph_gen1)) @@ -1563,6 +1595,20 @@ static const struct imx6_pcie_drvdata drvdata[] = { .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE, .epc_features = &imx8m_pcie_epc_features, }, + [IMX95_EP] = { + .variant = IMX95_EP, + .flags = IMX6_PCIE_FLAG_HAS_SERDES | + IMX6_PCIE_FLAG_SUPPORT_64BIT, + .clk_names = imx8mq_clks, + .clks_cnt = ARRAY_SIZE(imx8mq_clks), + .ltssm_off = IMX95_PE0_GEN_CTRL_3, + .ltssm_mask = IMX95_PCIE_LTSSM_EN, + .mode_off[0] = IMX95_PE0_GEN_CTRL_1, + .mode_mask[0] = IMX95_PCIE_DEVICE_TYPE, + .init_phy = imx95_pcie_init_phy, + .epc_features = &imx95_pcie_epc_features, + .mode = DW_PCIE_EP_TYPE, + }, }; static const struct of_device_id imx6_pcie_of_match[] = { @@ -1577,6 +1623,7 @@ static const struct of_device_id imx6_pcie_of_match[] = { { .compatible = "fsl,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], }, { .compatible = "fsl,imx8mm-pcie-ep", .data = &drvdata[IMX8MM_EP], }, { .compatible = "fsl,imx8mp-pcie-ep", .data = &drvdata[IMX8MP_EP], }, + { .compatible = "fsl,imx95-pcie-ep", .data = &drvdata[IMX95_EP], }, {}, }; -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel