diff mbox series

[v8,12/16] PCI: imx6: Add iMX95 PCIe Root Complex support

Message ID 20240108232145.2116455-13-Frank.Li@nxp.com (mailing list archive)
State Superseded
Headers show
Series PCI: imx6: Clean up and add imx95 pci support | expand

Commit Message

Frank Li Jan. 8, 2024, 11:21 p.m. UTC 
Add iMX95 PCIe Root Complex support.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---

Notes:
    Change from v7 to v8
    - Update commit subject
    - add const from regmap
    - remove unnessary logic in imx6_pcie_deassert_core_reset()
    
    Change from v4 to v7
    - none
    Change from v1 to v3
    - none

 drivers/pci/controller/dwc/pci-imx6.c | 82 +++++++++++++++++++++++++--
 1 file changed, 77 insertions(+), 5 deletions(-)

Comments

Manivannan Sadhasivam Jan. 19, 2024, 8:27 a.m. UTC | #1 
On Mon, Jan 08, 2024 at 06:21:41PM -0500, Frank Li wrote:
> Add iMX95 PCIe Root Complex support.
> 
> Signed-off-by: Frank Li <Frank.Li@nxp.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

- Mani

> ---
> 
> Notes:
>     Change from v7 to v8
>     - Update commit subject
>     - add const from regmap
>     - remove unnessary logic in imx6_pcie_deassert_core_reset()
>     
>     Change from v4 to v7
>     - none
>     Change from v1 to v3
>     - none
> 
>  drivers/pci/controller/dwc/pci-imx6.c | 82 +++++++++++++++++++++++++--
>  1 file changed, 77 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index ac338a88fe21e..c0d08cd55d681 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -42,6 +42,25 @@
>  #define IMX8MQ_GPR_PCIE_VREG_BYPASS		BIT(12)
>  #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE	GENMASK(11, 8)
>  
> +#define IMX95_PCIE_PHY_GEN_CTRL			0x0
> +#define IMX95_PCIE_REF_USE_PAD			BIT(17)
> +
> +#define IMX95_PCIE_PHY_MPLLA_CTRL		0x10
> +#define IMX95_PCIE_PHY_MPLL_STATE		BIT(30)
> +
> +#define IMX95_PCIE_SS_RW_REG_0			0xf0
> +#define IMX95_PCIE_REF_CLKEN			BIT(23)
> +#define IMX95_PCIE_PHY_CR_PARA_SEL		BIT(9)
> +
> +#define IMX95_PE0_GEN_CTRL_1			0x1050
> +#define IMX95_PCIE_DEVICE_TYPE			GENMASK(3, 0)
> +
> +#define IMX95_PE0_GEN_CTRL_3			0x1058
> +#define IMX95_PCIE_LTSSM_EN			BIT(0)
> +
> +#define IMX95_PE0_PM_STS			0x1064
> +#define IMX95_PCIE_PM_LINKST_IN_L2		BIT(14)
> +
>  #define to_imx6_pcie(x)	dev_get_drvdata((x)->dev)
>  
>  enum imx6_pcie_variants {
> @@ -52,6 +71,7 @@ enum imx6_pcie_variants {
>  	IMX8MQ,
>  	IMX8MM,
>  	IMX8MP,
> +	IMX95,
>  	IMX8MQ_EP,
>  	IMX8MM_EP,
>  	IMX8MP_EP,
> @@ -63,6 +83,7 @@ enum imx6_pcie_variants {
>  #define IMX6_PCIE_FLAG_HAS_PHYDRV			BIT(3)
>  #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_check_flag(pci, val)     (pci->drvdata->flags & val)
>  
> @@ -179,6 +200,24 @@ static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
>  	return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
>  }
>  
> +static int imx95_pcie_init_phy(struct imx6_pcie *imx6_pcie)
> +{
> +	regmap_update_bits(imx6_pcie->iomuxc_gpr,
> +			IMX95_PCIE_SS_RW_REG_0,
> +			IMX95_PCIE_PHY_CR_PARA_SEL,
> +			IMX95_PCIE_PHY_CR_PARA_SEL);
> +
> +	regmap_update_bits(imx6_pcie->iomuxc_gpr,
> +			   IMX95_PCIE_PHY_GEN_CTRL,
> +			   IMX95_PCIE_REF_USE_PAD, 0);
> +	regmap_update_bits(imx6_pcie->iomuxc_gpr,
> +			   IMX95_PCIE_SS_RW_REG_0,
> +			   IMX95_PCIE_REF_CLKEN,
> +			   IMX95_PCIE_REF_CLKEN);
> +
> +	return 0;
> +}
> +
>  static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie)
>  {
>  	const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
> @@ -575,6 +614,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
>  				   IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
>  		break;
>  	case IMX7D:
> +	case IMX95:
>  		break;
>  	case IMX8MM:
>  	case IMX8MM_EP:
> @@ -1280,12 +1320,32 @@ static int imx6_pcie_probe(struct platform_device *pdev)
>  		return PTR_ERR(imx6_pcie->turnoff_reset);
>  	}
>  
> +	if (imx6_pcie->drvdata->gpr) {
>  	/* Grab GPR config register range */
> -	imx6_pcie->iomuxc_gpr =
> -		 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
> -	if (IS_ERR(imx6_pcie->iomuxc_gpr)) {
> -		dev_err(dev, "unable to find iomuxc registers\n");
> -		return PTR_ERR(imx6_pcie->iomuxc_gpr);
> +		imx6_pcie->iomuxc_gpr =
> +			 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
> +		if (IS_ERR(imx6_pcie->iomuxc_gpr))
> +			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
> +					     "unable to find iomuxc registers\n");
> +	}
> +
> +	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_SERDES)) {
> +		void __iomem *off = devm_platform_ioremap_resource_byname(pdev, "app");
> +
> +		if (IS_ERR(off))
> +			return dev_err_probe(dev, PTR_ERR(off),
> +					     "unable to find serdes registers\n");
> +
> +		static const struct regmap_config regmap_config = {
> +			.reg_bits = 32,
> +			.val_bits = 32,
> +			.reg_stride = 4,
> +		};
> +
> +		imx6_pcie->iomuxc_gpr = devm_regmap_init_mmio(dev, off, &regmap_config);
> +		if (IS_ERR(imx6_pcie->iomuxc_gpr))
> +			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
> +					     "unable to find iomuxc registers\n");
>  	}
>  
>  	/* Grab PCIe PHY Tx Settings */
> @@ -1462,6 +1522,17 @@ static const struct imx6_pcie_drvdata drvdata[] = {
>  		.mode_off[0] = IOMUXC_GPR12,
>  		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
>  	},
> +	[IMX95] = {
> +		.variant = IMX95,
> +		.flags = IMX6_PCIE_FLAG_HAS_SERDES,
> +		.clk_names = imx6_4clks_bus_pcie_phy_aux,
> +		.clks_cnt = ARRAY_SIZE(imx6_4clks_bus_pcie_phy_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,
> +	},
>  	[IMX8MQ_EP] = {
>  		.variant = IMX8MQ_EP,
>  		.flags = IMX6_PCIE_FLAG_HAS_APP_RESET |
> @@ -1506,6 +1577,7 @@ 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,imx95-pcie", .data = &drvdata[IMX95], },
>  	{ .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], },
> -- 
> 2.34.1
>
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index ac338a88fe21e..c0d08cd55d681 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -42,6 +42,25 @@ 
 #define IMX8MQ_GPR_PCIE_VREG_BYPASS		BIT(12)
 #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE	GENMASK(11, 8)
 
+#define IMX95_PCIE_PHY_GEN_CTRL			0x0
+#define IMX95_PCIE_REF_USE_PAD			BIT(17)
+
+#define IMX95_PCIE_PHY_MPLLA_CTRL		0x10
+#define IMX95_PCIE_PHY_MPLL_STATE		BIT(30)
+
+#define IMX95_PCIE_SS_RW_REG_0			0xf0
+#define IMX95_PCIE_REF_CLKEN			BIT(23)
+#define IMX95_PCIE_PHY_CR_PARA_SEL		BIT(9)
+
+#define IMX95_PE0_GEN_CTRL_1			0x1050
+#define IMX95_PCIE_DEVICE_TYPE			GENMASK(3, 0)
+
+#define IMX95_PE0_GEN_CTRL_3			0x1058
+#define IMX95_PCIE_LTSSM_EN			BIT(0)
+
+#define IMX95_PE0_PM_STS			0x1064
+#define IMX95_PCIE_PM_LINKST_IN_L2		BIT(14)
+
 #define to_imx6_pcie(x)	dev_get_drvdata((x)->dev)
 
 enum imx6_pcie_variants {
@@ -52,6 +71,7 @@  enum imx6_pcie_variants {
 	IMX8MQ,
 	IMX8MM,
 	IMX8MP,
+	IMX95,
 	IMX8MQ_EP,
 	IMX8MM_EP,
 	IMX8MP_EP,
@@ -63,6 +83,7 @@  enum imx6_pcie_variants {
 #define IMX6_PCIE_FLAG_HAS_PHYDRV			BIT(3)
 #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_check_flag(pci, val)     (pci->drvdata->flags & val)
 
@@ -179,6 +200,24 @@  static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
 	return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
 }
 
+static int imx95_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			IMX95_PCIE_SS_RW_REG_0,
+			IMX95_PCIE_PHY_CR_PARA_SEL,
+			IMX95_PCIE_PHY_CR_PARA_SEL);
+
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			   IMX95_PCIE_PHY_GEN_CTRL,
+			   IMX95_PCIE_REF_USE_PAD, 0);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			   IMX95_PCIE_SS_RW_REG_0,
+			   IMX95_PCIE_REF_CLKEN,
+			   IMX95_PCIE_REF_CLKEN);
+
+	return 0;
+}
+
 static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie)
 {
 	const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
@@ -575,6 +614,7 @@  static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 				   IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
 		break;
 	case IMX7D:
+	case IMX95:
 		break;
 	case IMX8MM:
 	case IMX8MM_EP:
@@ -1280,12 +1320,32 @@  static int imx6_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(imx6_pcie->turnoff_reset);
 	}
 
+	if (imx6_pcie->drvdata->gpr) {
 	/* Grab GPR config register range */
-	imx6_pcie->iomuxc_gpr =
-		 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
-	if (IS_ERR(imx6_pcie->iomuxc_gpr)) {
-		dev_err(dev, "unable to find iomuxc registers\n");
-		return PTR_ERR(imx6_pcie->iomuxc_gpr);
+		imx6_pcie->iomuxc_gpr =
+			 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
+		if (IS_ERR(imx6_pcie->iomuxc_gpr))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
+					     "unable to find iomuxc registers\n");
+	}
+
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_SERDES)) {
+		void __iomem *off = devm_platform_ioremap_resource_byname(pdev, "app");
+
+		if (IS_ERR(off))
+			return dev_err_probe(dev, PTR_ERR(off),
+					     "unable to find serdes registers\n");
+
+		static const struct regmap_config regmap_config = {
+			.reg_bits = 32,
+			.val_bits = 32,
+			.reg_stride = 4,
+		};
+
+		imx6_pcie->iomuxc_gpr = devm_regmap_init_mmio(dev, off, &regmap_config);
+		if (IS_ERR(imx6_pcie->iomuxc_gpr))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
+					     "unable to find iomuxc registers\n");
 	}
 
 	/* Grab PCIe PHY Tx Settings */
@@ -1462,6 +1522,17 @@  static const struct imx6_pcie_drvdata drvdata[] = {
 		.mode_off[0] = IOMUXC_GPR12,
 		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
 	},
+	[IMX95] = {
+		.variant = IMX95,
+		.flags = IMX6_PCIE_FLAG_HAS_SERDES,
+		.clk_names = imx6_4clks_bus_pcie_phy_aux,
+		.clks_cnt = ARRAY_SIZE(imx6_4clks_bus_pcie_phy_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,
+	},
 	[IMX8MQ_EP] = {
 		.variant = IMX8MQ_EP,
 		.flags = IMX6_PCIE_FLAG_HAS_APP_RESET |
@@ -1506,6 +1577,7 @@  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,imx95-pcie", .data = &drvdata[IMX95], },
 	{ .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], },