From: Vidya Sagar Date: Tue, 13 Aug 2019 11:36:22 +0000 (+0530) Subject: PCI: dwc: Add support to enable CDM register check X-Git-Tag: v5.15~5438^2~2^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=07f123def73e07e398537be7a5b43a244cb0cbf3;p=platform%2Fkernel%2Flinux-starfive.git PCI: dwc: Add support to enable CDM register check Add support to enable CDM (Configuration Dependent Module) register check for any data corruption based on the DT property 'snps,enable-cdm-check'. Signed-off-by: Vidya Sagar Signed-off-by: Lorenzo Pieralisi Reviewed-by: Thierry Reding Acked-by: Gustavo Pimentel --- diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 1d87e823..59eaeeb 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -547,4 +547,11 @@ void dw_pcie_setup(struct dw_pcie *pci) break; } dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val); + + if (of_property_read_bool(np, "snps,enable-cdm-check")) { + val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS); + val |= PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS | + PCIE_PL_CHK_REG_CHK_REG_START; + dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val); + } } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 11c2234..5a18e94 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -86,6 +86,15 @@ #define PCIE_MISC_CONTROL_1_OFF 0x8BC #define PCIE_DBI_RO_WR_EN BIT(0) +#define PCIE_PL_CHK_REG_CONTROL_STATUS 0xB20 +#define PCIE_PL_CHK_REG_CHK_REG_START BIT(0) +#define PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS BIT(1) +#define PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR BIT(16) +#define PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR BIT(17) +#define PCIE_PL_CHK_REG_CHK_REG_COMPLETE BIT(18) + +#define PCIE_PL_CHK_REG_ERR_ADDR 0xB28 + /* * iATU Unroll-specific register definitions * From 4.80 core version the address translation will be made by unroll