diff options
Diffstat (limited to 'drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c')
| -rw-r--r-- | drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c index f35464653f34..43dede26cc7c 100644 --- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c +++ b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c @@ -22,8 +22,13 @@ #include "pcie-mobiveil.h" +#define REV_1_0 (0x10) + /* LUT and PF control registers */ #define PCIE_LUT_OFF 0x80000 +#define PCIE_LUT_GCR 0x28 +#define PCIE_LUT_GCR_RRE 0 + #define PCIE_PF_OFF 0xc0000 #define PCIE_PF_INT_STAT 0x18 #define PF_INT_STAT_PABRST BIT(31) @@ -40,6 +45,7 @@ struct ls_g4_pcie { struct mobiveil_pcie pci; struct delayed_work dwork; int irq; + u8 rev; }; static inline u32 ls_g4_pcie_lut_readl(struct ls_g4_pcie *pcie, u32 off) @@ -75,6 +81,15 @@ static bool ls_g4_pcie_is_bridge(struct ls_g4_pcie *pcie) return header_type == PCI_HEADER_TYPE_BRIDGE; } +static int ls_g4_pcie_host_init(struct mobiveil_pcie *pci) +{ + struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci); + + pcie->rev = mobiveil_csr_readb(pci, PCI_REVISION_ID); + + return 0; +} + static int ls_g4_pcie_link_up(struct mobiveil_pcie *pci) { struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci); @@ -212,12 +227,34 @@ static void ls_g4_pcie_reset(struct work_struct *work) ls_g4_pcie_enable_interrupt(pcie); } +static int ls_g4_pcie_read_other_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + struct mobiveil_pcie *pci = bus->sysdata; + struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci); + int ret; + + if (pcie->rev == REV_1_0 && where == PCI_VENDOR_ID) + ls_g4_pcie_lut_writel(pcie, PCIE_LUT_GCR, + 0 << PCIE_LUT_GCR_RRE); + + ret = pci_generic_config_read(bus, devfn, where, size, val); + + if (pcie->rev == REV_1_0 && where == PCI_VENDOR_ID) + ls_g4_pcie_lut_writel(pcie, PCIE_LUT_GCR, + 1 << PCIE_LUT_GCR_RRE); + + return ret; +} + static struct mobiveil_rp_ops ls_g4_pcie_rp_ops = { .interrupt_init = ls_g4_pcie_interrupt_init, + .read_other_conf = ls_g4_pcie_read_other_conf, }; static const struct mobiveil_pab_ops ls_g4_pcie_pab_ops = { .link_up = ls_g4_pcie_link_up, + .host_init = ls_g4_pcie_host_init, }; static int __init ls_g4_pcie_probe(struct platform_device *pdev) |