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PCI: rcar: Add Gen2 PHY setup to pcie-rcar 

For PCIe compliance, the PHY registers need setting as per the manual.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Phil Edworthy 2016-01-05 13:00:31 +00:00 committed by Bjorn Helgaas
parent de1be9a889
commit 581d9434aa
1 changed files with 28 additions and 3 deletions
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31
drivers/pci/host/pcie-rcar.c
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@ -95,6 +95,11 @@
#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))
@ -568,6 +573,26 @@ static int rcar_pcie_hw_init_h1(struct rcar_pcie *pcie)
return -ETIMEDOUT;
}
static int rcar_pcie_hw_init_gen2(struct rcar_pcie *pcie)
{
/*
* These settings come from the R-Car Series, 2nd Generation User's
* Manual, section 50.3.1 (2) Initialization of the physical layer.
*/
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;
@ -907,9 +932,9 @@ 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 },
{},
};