diff options
| author | Richard Zhu <hongxing.zhu@nxp.com> | 2023-04-20 19:51:03 +0800 |
|---|---|---|
| committer | Richard Zhu <hongxing.zhu@nxp.com> | 2024-10-08 11:23:40 +0800 |
| commit | 9615e92c7db8fe46a3bef6155f893f1e0b1707fa (patch) | |
| tree | cdf318a1a577604a34019666d6e26f44c5f4a8da | |
| parent | 55206c931a10f72a3f0369d23f96e3ab82d922cd (diff) | |
LF-8859 PCI: imx6: Add the compliance tests enable option for compliance tests
Add the i.MX PCIe compliance tests mode support. Add "pcie_cz_enabled=yes"
into kernel command line to enable the compliance tests mode for
compliance tests only.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
| -rw-r--r-- | drivers/pci/controller/dwc/pci-imx6.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index e3a642c131ad..90e6f14b1759 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -227,6 +227,7 @@ struct imx6_pcie { #define CTRL2_PM_XMT_TURNOFF BIT(9) #define STTS0_PM_LINKST_IN_L2 BIT(13) +static int imx6_pcie_cz_enabled; static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie) { WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ && @@ -1135,12 +1136,14 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) * started in Gen2 mode, there is a possibility the devices on the * bus will not be detected at all. This happens with PCIe switches. */ - dw_pcie_dbi_ro_wr_en(pci); - tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); - tmp &= ~PCI_EXP_LNKCAP_SLS; - tmp |= PCI_EXP_LNKCAP_SLS_2_5GB; - dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, tmp); - dw_pcie_dbi_ro_wr_dis(pci); + if (!imx6_pcie_cz_enabled) { + dw_pcie_dbi_ro_wr_en(pci); + tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); + tmp &= ~PCI_EXP_LNKCAP_SLS; + tmp |= PCI_EXP_LNKCAP_SLS_2_5GB; + dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, tmp); + dw_pcie_dbi_ro_wr_dis(pci); + } /* Start LTSSM. */ imx6_pcie_ltssm_enable(dev); @@ -1485,6 +1488,11 @@ static void imx6_pcie_host_exit(struct dw_pcie_rp *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); + if (imx6_pcie_cz_enabled) { + pr_info("PCIe compliance tests mode is enabled.\n"); + return; + } + if (imx6_pcie->phy) { if (phy_power_off(imx6_pcie->phy)) dev_err(pci->dev, "unable to power off PHY\n"); @@ -1838,6 +1846,17 @@ irqreturn_t host_wake_irq_handler(int irq, void *priv) return IRQ_HANDLED; } +static int __init imx6_pcie_compliance_test_enable(char *str) +{ + if (!strcmp(str, "yes")) { + pr_info("Enable the i.MX PCIe compliance tests mode.\n"); + imx6_pcie_cz_enabled = 1; + } + return 1; +} + +__setup("pcie_cz_enabled=", imx6_pcie_compliance_test_enable); + static int imx6_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; |