[PATCH v3 7/9] PCI: imx6: Add i.MX6Q and i.MX6QP PCIe EP supports
From: Richard Zhu
Date: Tue Aug 08 2023 - 12:01:03 EST
Add i.MX6Q and i.MX6QP PCIe EP supports.
Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
---
drivers/pci/controller/dwc/pci-imx6.c | 59 +++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 27aaa2a6bf39..9a6531ddfef2 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -46,8 +46,10 @@
enum imx6_pcie_variants {
IMX6Q,
+ IMX6Q_EP,
IMX6SX,
IMX6QP,
+ IMX6QP_EP,
IMX7D,
IMX8MQ,
IMX8MM,
@@ -67,6 +69,7 @@ struct imx6_pcie_drvdata {
u32 flags;
int dbi_length;
const char *gpr;
+ const struct pci_epc_features *epc_features;
};
struct imx6_pcie {
@@ -567,7 +570,9 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
IMX6SX_GPR12_PCIE_TEST_POWERDOWN, 0);
break;
case IMX6QP:
+ case IMX6QP_EP:
case IMX6Q:
+ case IMX6Q_EP:
/* power up core phy and enable ref clock */
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18);
@@ -619,7 +624,9 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
break;
case IMX6QP:
+ case IMX6QP_EP:
case IMX6Q:
+ case IMX6Q_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_REF_CLK_EN, 0);
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
@@ -720,11 +727,13 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
IMX6SX_GPR5_PCIE_BTNRST_RESET);
break;
case IMX6QP:
+ case IMX6QP_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_SW_RST,
IMX6Q_GPR1_PCIE_SW_RST);
break;
case IMX6Q:
+ case IMX6Q_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18);
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
@@ -777,12 +786,14 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
IMX6SX_GPR5_PCIE_BTNRST_RESET, 0);
break;
case IMX6QP:
+ case IMX6QP_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_SW_RST, 0);
usleep_range(200, 500);
break;
case IMX6Q: /* Nothing to do */
+ case IMX6Q_EP:
case IMX8MM:
case IMX8MM_EP:
case IMX8MP:
@@ -827,8 +838,10 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
switch (imx6_pcie->drvdata->variant) {
case IMX6Q:
+ case IMX6Q_EP:
case IMX6SX:
case IMX6QP:
+ case IMX6QP_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6Q_GPR12_PCIE_CTL_2,
IMX6Q_GPR12_PCIE_CTL_2);
@@ -851,8 +864,10 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
switch (imx6_pcie->drvdata->variant) {
case IMX6Q:
+ case IMX6Q_EP:
case IMX6SX:
case IMX6QP:
+ case IMX6QP_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6Q_GPR12_PCIE_CTL_2, 0);
break;
@@ -1077,6 +1092,27 @@ static int imx6_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
return 0;
}
+/*
+ * i.MX6Q and i.MX6QP PCIe EP BAR definitions.
+ * +-----------------------------------------------------------------+
+ * | BAR0 | BAR1 | BAR2 | BAR3 | BAR4 | BAR5 |
+ * +----------|----------|----------|----------|----------|----------+
+ * | 64-bit | Disabled | 32-bit | 32-bit | Disabled | Disabled |
+ * | | | | Fixed | | |
+ * | | | | 256Bytes | | |
+ * | Prefetch | | Prefetch | None- | | |
+ * | Memory | | Memory | Prefetch | | |
+ * | | | | IO | | |
+ * +-----------------------------------------------------------------+
+ */
+static const struct pci_epc_features imx6q_pcie_epc_features = {
+ .linkup_notifier = false,
+ .msi_capable = true,
+ .msix_capable = false,
+ .reserved_bar = 1 << BAR_4 | 1 << BAR_5,
+ .align = SZ_64K,
+};
+
static const struct pci_epc_features imx8m_pcie_epc_features = {
.linkup_notifier = false,
.msi_capable = true,
@@ -1088,6 +1124,12 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
static const struct pci_epc_features*
imx6_pcie_ep_get_features(struct dw_pcie_ep *ep)
{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci);
+
+ if (imx6_pcie->drvdata->epc_features)
+ return imx6_pcie->drvdata->epc_features;
+
return &imx8m_pcie_epc_features;
}
@@ -1157,6 +1199,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
case IMX6QP:
+ case IMX6QP_EP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6SX_GPR12_PCIE_PM_TURN_OFF,
IMX6SX_GPR12_PCIE_PM_TURN_OFF);
@@ -1478,6 +1521,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.dbi_length = 0x200,
.gpr = "fsl,imx6q-iomuxc-gpr",
},
+ [IMX6Q_EP] = {
+ .variant = IMX6Q_EP,
+ .mode = DW_PCIE_EP_TYPE,
+ .flags = IMX6_PCIE_FLAG_IMX6_PHY,
+ .gpr = "fsl,imx6q-iomuxc-gpr",
+ .epc_features = &imx6q_pcie_epc_features,
+ },
[IMX6SX] = {
.variant = IMX6SX,
.flags = IMX6_PCIE_FLAG_IMX6_PHY |
@@ -1493,6 +1543,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.dbi_length = 0x200,
.gpr = "fsl,imx6q-iomuxc-gpr",
},
+ [IMX6QP_EP] = {
+ .variant = IMX6QP_EP,
+ .mode = DW_PCIE_EP_TYPE,
+ .flags = IMX6_PCIE_FLAG_IMX6_PHY,
+ .gpr = "fsl,imx6q-iomuxc-gpr",
+ .epc_features = &imx6q_pcie_epc_features,
+ },
[IMX7D] = {
.variant = IMX7D,
.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
@@ -1531,8 +1588,10 @@ static const struct imx6_pcie_drvdata drvdata[] = {
static const struct of_device_id imx6_pcie_of_match[] = {
{ .compatible = "fsl,imx6q-pcie", .data = &drvdata[IMX6Q], },
+ { .compatible = "fsl,imx6q-pcie-ep", .data = &drvdata[IMX6Q_EP], },
{ .compatible = "fsl,imx6sx-pcie", .data = &drvdata[IMX6SX], },
{ .compatible = "fsl,imx6qp-pcie", .data = &drvdata[IMX6QP], },
+ { .compatible = "fsl,imx6qp-pcie-ep", .data = &drvdata[IMX6QP_EP], },
{ .compatible = "fsl,imx7d-pcie", .data = &drvdata[IMX7D], },
{ .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], },
{ .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
--
2.34.1