From 530ba41250b69db4b5beb9fc03bd7183881c5e7f Mon Sep 17 00:00:00 2001 From: Richard Zhu Date: Mon, 16 Jan 2023 13:41:22 +0800 Subject: [PATCH] PCI: imx6: Add i.MX8MQ PCIe EP support Add i.MX8MQ PCIe EP support. Link: https://lore.kernel.org/r/1673847684-31893-13-git-send-email-hongxing.zhu@nxp.com Signed-off-by: Richard Zhu Signed-off-by: Lorenzo Pieralisi --- drivers/pci/controller/dwc/pci-imx6.c | 38 ++++++++++++++++++++++++++++++----- 1 file changed, 33 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 572faa9..8190b1d 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -52,6 +52,7 @@ enum imx6_pcie_variants { IMX8MQ, IMX8MM, IMX8MP, + IMX8MQ_EP, }; #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0) @@ -153,6 +154,7 @@ struct imx6_pcie { static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie) { WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ && + imx6_pcie->drvdata->variant != IMX8MQ_EP && imx6_pcie->drvdata->variant != IMX8MM && imx6_pcie->drvdata->variant != IMX8MP); return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14; @@ -167,13 +169,22 @@ static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) else mode = PCI_EXP_TYPE_ROOT_PORT; - if (imx6_pcie->drvdata->variant == IMX8MQ && - imx6_pcie->controller_id == 1) { - mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE; - val = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, mode); - } else { + switch (imx6_pcie->drvdata->variant) { + case IMX8MQ: + case IMX8MQ_EP: + if (imx6_pcie->controller_id == 1) { + mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE; + val = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, + mode); + } else { + mask = IMX6Q_GPR12_DEVICE_TYPE; + val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode); + } + break; + default: mask = IMX6Q_GPR12_DEVICE_TYPE; val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode); + break; } regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val); @@ -315,6 +326,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) */ break; case IMX8MQ: + case IMX8MQ_EP: /* * TODO: Currently this code assumes external * oscillator is being used @@ -566,6 +578,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) break; case IMX8MM: case IMX8MQ: + case IMX8MQ_EP: case IMX8MP: ret = clk_prepare_enable(imx6_pcie->pcie_aux); if (ret) { @@ -611,6 +624,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie) break; case IMX8MM: case IMX8MQ: + case IMX8MQ_EP: case IMX8MP: clk_disable_unprepare(imx6_pcie->pcie_aux); break; @@ -676,6 +690,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) switch (imx6_pcie->drvdata->variant) { case IMX7D: case IMX8MQ: + case IMX8MQ_EP: reset_control_assert(imx6_pcie->pciephy_reset); fallthrough; case IMX8MM: @@ -717,6 +732,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) switch (imx6_pcie->drvdata->variant) { case IMX8MQ: + case IMX8MQ_EP: reset_control_deassert(imx6_pcie->pciephy_reset); break; case IMX7D: @@ -804,6 +820,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev) break; case IMX7D: case IMX8MQ: + case IMX8MQ_EP: case IMX8MM: case IMX8MP: reset_control_deassert(imx6_pcie->apps_reset); @@ -824,6 +841,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev) break; case IMX7D: case IMX8MQ: + case IMX8MQ_EP: case IMX8MM: case IMX8MP: reset_control_assert(imx6_pcie->apps_reset); @@ -1076,6 +1094,9 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie, ep->ops = &pcie_ep_ops; switch (imx6_pcie->drvdata->variant) { + case IMX8MQ_EP: + pcie_dbi2_offset = SZ_1M; + break; default: pcie_dbi2_offset = SZ_4K; break; @@ -1261,6 +1282,7 @@ static int imx6_pcie_probe(struct platform_device *pdev) "pcie_inbound_axi clock missing or invalid\n"); break; case IMX8MQ: + case IMX8MQ_EP: imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux"); if (IS_ERR(imx6_pcie->pcie_aux)) return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), @@ -1445,6 +1467,11 @@ static const struct imx6_pcie_drvdata drvdata[] = { .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr = "fsl,imx8mp-iomuxc-gpr", }, + [IMX8MQ_EP] = { + .variant = IMX8MQ_EP, + .mode = DW_PCIE_EP_TYPE, + .gpr = "fsl,imx8mq-iomuxc-gpr", + }, }; static const struct of_device_id imx6_pcie_of_match[] = { @@ -1455,6 +1482,7 @@ static const struct of_device_id imx6_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,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], }, {}, }; -- 2.7.4