| Message ID | 1450358557-28376-5-git-send-email-phil.edworthy@renesas.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
> + rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); > + rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); > + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > + > + rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); > + /* The following value is for DC connection, no termination resistor */ > + rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); > + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); I'd vote for a comment saying where these magic values come from, i.e. which manual, which chapter, etc...
Hi Wolfram, On 17 December 2015 13:33, Wolfram Sang wrote: > > + rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); > > + rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); > > + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > > + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > > + > > + rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); > > + /* The following value is for DC connection, no termination resistor */ > > + rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); > > + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > > + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > > I'd vote for a comment saying where these magic values come from, i.e. > which manual, which chapter, etc... Ok, will do. Thanks Phil -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 02a5993..61e112e 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -103,6 +103,11 @@ #define H1_PCIEPHYDOUTR 0x040014 #define H1_PCIEPHYSR 0x040018 +/* R-Car Gen2 PHY */ +#define GEN2_PCIEPHYADDR 0x780 +#define GEN2_PCIEPHYDATA 0x784 +#define GEN2_PCIEPHYCTRL 0x78c + #define INT_PCI_MSI_NR 32 #define RCONF(x) (PCICONF(0)+(x)) @@ -593,6 +598,22 @@ static int rcar_pcie_hw_init_h1(struct rcar_pcie *pcie) return -ETIMEDOUT; } +static int rcar_pcie_hw_init_gen2(struct rcar_pcie *pcie) +{ + rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); + rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); + + rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); + /* The following value is for DC connection, no termination resistor */ + rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); + + return rcar_pcie_hw_init(pcie); +} + static int rcar_msi_alloc(struct rcar_msi *chip) { int msi; @@ -932,9 +953,9 @@ static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, static const struct of_device_id rcar_pcie_of_match[] = { { .compatible = "renesas,pcie-r8a7779", .data = rcar_pcie_hw_init_h1 }, - { .compatible = "renesas,pcie-rcar-gen2", .data = rcar_pcie_hw_init }, - { .compatible = "renesas,pcie-r8a7790", .data = rcar_pcie_hw_init }, - { .compatible = "renesas,pcie-r8a7791", .data = rcar_pcie_hw_init }, + { .compatible = "renesas,pcie-rcar-gen2", .data = rcar_pcie_hw_init_gen2 }, + { .compatible = "renesas,pcie-r8a7790", .data = rcar_pcie_hw_init_gen2 }, + { .compatible = "renesas,pcie-r8a7791", .data = rcar_pcie_hw_init_gen2 }, { .compatible = "renesas,pcie-r8a7795", .data = rcar_pcie_hw_init }, {}, };
For PCIe compliance, the PHY registers need setting as per the manual. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> --- drivers/pci/host/pcie-rcar.c | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-)