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Sun, 24 Dec 2023 18:34:27 +0000 From: Frank Li To: krzysztof.kozlowski@linaro.org Cc: Frank.Li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v6 16/16] PCI: imx6: Add iMX95 Endpoint (EP) function support Date: Sun, 24 Dec 2023 13:32:42 -0500 Message-Id: <20231224183242.1675372-17-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231224183242.1675372-1-Frank.Li@nxp.com> References: <20231224183242.1675372-1-Frank.Li@nxp.com> X-ClientProxiedBy: SJ0PR03CA0169.namprd03.prod.outlook.com (2603:10b6:a03:338::24) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|AS5PR04MB10020:EE_ X-MS-Office365-Filtering-Correlation-Id: 8c4eeb5f-4453-4424-c400-08dc04aef5be X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Internal bus bridge for PCI support 64bit dma address in iMX95. So set call dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)). Signed-off-by: Frank Li --- Notes: 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 | 45 +++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 6a58fd63a9dd2..00ec59867c17b 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) @@ -620,6 +622,7 @@ 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: @@ -1063,6 +1066,23 @@ 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 + * | (BAR0 is 64-bit) | if BAR0 is 32-bit | | As 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) { @@ -1105,6 +1125,14 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie, pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset; + /* + * db2 information should fetch from dtb file. dw_pcie_ep_init() can get dbi_base2 from + * "dbi2" if pci->dbi_base2 is NULL. All code related pcie_dbi2_offset should be removed + * after all dts added "dbi2" reg. + */ + 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"); @@ -1355,6 +1383,9 @@ 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)) @@ -1557,6 +1588,19 @@ 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 = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"}, + .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[] = { @@ -1571,6 +1615,7 @@ 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], }, {}, };