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PCI: xgene: Convert to use generic config accessors 

Convert the xgene host PCI driver to use the generic config access
functions.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Tanmay Inamdar <tinamdar@apm.com>
CC: linux-arm-kernel@lists.infradead.org
This commit is contained in:
Rob Herring 2015-01-09 20:34:49 -06:00 committed by Bjorn Helgaas
parent 0e7ac8de01
commit 350f8be5bb
1 changed files with 9 additions and 141 deletions
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150
drivers/pci/host/pci-xgene.c
View File

@ -74,92 +74,6 @@ static inline u32 pcie_bar_low_val(u32 addr, u32 flags)
return (addr & PCI_BASE_ADDRESS_MEM_MASK) | flags; return (addr & PCI_BASE_ADDRESS_MEM_MASK) | flags;
} }
/* PCIe Configuration Out/In */
static inline void xgene_pcie_cfg_out32(void __iomem *addr, int offset, u32 val)
{
writel(val, addr + offset);
}
static inline void xgene_pcie_cfg_out16(void __iomem *addr, int offset, u16 val)
{
u32 val32 = readl(addr + (offset & ~0x3));
switch (offset & 0x3) {
case 2:
val32 &= ~0xFFFF0000;
val32 |= (u32)val << 16;
break;
case 0:
default:
val32 &= ~0xFFFF;
val32 |= val;
break;
}
writel(val32, addr + (offset & ~0x3));
}
static inline void xgene_pcie_cfg_out8(void __iomem *addr, int offset, u8 val)
{
u32 val32 = readl(addr + (offset & ~0x3));
switch (offset & 0x3) {
case 0:
val32 &= ~0xFF;
val32 |= val;
break;
case 1:
val32 &= ~0xFF00;
val32 |= (u32)val << 8;
break;
case 2:
val32 &= ~0xFF0000;
val32 |= (u32)val << 16;
break;
case 3:
default:
val32 &= ~0xFF000000;
val32 |= (u32)val << 24;
break;
}
writel(val32, addr + (offset & ~0x3));
}
static inline void xgene_pcie_cfg_in32(void __iomem *addr, int offset, u32 *val)
{
*val = readl(addr + offset);
}
static inline void xgene_pcie_cfg_in16(void __iomem *addr, int offset, u32 *val)
{
*val = readl(addr + (offset & ~0x3));
switch (offset & 0x3) {
case 2:
*val >>= 16;
break;
}
*val &= 0xFFFF;
}
static inline void xgene_pcie_cfg_in8(void __iomem *addr, int offset, u32 *val)
{
*val = readl(addr + (offset & ~0x3));
switch (offset & 0x3) {
case 3:
*val = *val >> 24;
break;
case 2:
*val = *val >> 16;
break;
case 1:
*val = *val >> 8;
break;
}
*val &= 0xFF;
}
/* /*
* When the address bit [17:16] is 2'b01, the Configuration access will be * When the address bit [17:16] is 2'b01, the Configuration access will be
* treated as Type 1 and it will be forwarded to external PCIe device. * treated as Type 1 and it will be forwarded to external PCIe device.
@ -213,69 +127,23 @@ static bool xgene_pcie_hide_rc_bars(struct pci_bus *bus, int offset)
return false; return false;
} }
static int xgene_pcie_read_config(struct pci_bus *bus, unsigned int devfn, static int xgene_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val) int offset)
{ {
struct xgene_pcie_port *port = bus->sysdata; struct xgene_pcie_port *port = bus->sysdata;
void __iomem *addr;
if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up) if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up ||
return PCIBIOS_DEVICE_NOT_FOUND; xgene_pcie_hide_rc_bars(bus, offset))
return NULL;
if (xgene_pcie_hide_rc_bars(bus, offset)) {
*val = 0;
return PCIBIOS_SUCCESSFUL;
}
xgene_pcie_set_rtdid_reg(bus, devfn); xgene_pcie_set_rtdid_reg(bus, devfn);
addr = xgene_pcie_get_cfg_base(bus); return xgene_pcie_get_cfg_base(bus);
switch (len) {
case 1:
xgene_pcie_cfg_in8(addr, offset, val);
break;
case 2:
xgene_pcie_cfg_in16(addr, offset, val);
break;
default:
xgene_pcie_cfg_in32(addr, offset, val);
break;
}
return PCIBIOS_SUCCESSFUL;
}
static int xgene_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val)
{
struct xgene_pcie_port *port = bus->sysdata;
void __iomem *addr;
if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up)
return PCIBIOS_DEVICE_NOT_FOUND;
if (xgene_pcie_hide_rc_bars(bus, offset))
return PCIBIOS_SUCCESSFUL;
xgene_pcie_set_rtdid_reg(bus, devfn);
addr = xgene_pcie_get_cfg_base(bus);
switch (len) {
case 1:
xgene_pcie_cfg_out8(addr, offset, (u8)val);
break;
case 2:
xgene_pcie_cfg_out16(addr, offset, (u16)val);
break;
default:
xgene_pcie_cfg_out32(addr, offset, val);
break;
}
return PCIBIOS_SUCCESSFUL;
} }
static struct pci_ops xgene_pcie_ops = { static struct pci_ops xgene_pcie_ops = {
.read = xgene_pcie_read_config, .map_bus = xgene_pcie_map_bus,
.write = xgene_pcie_write_config .read = pci_generic_config_read32,
.write = pci_generic_config_write32,
}; };
static u64 xgene_pcie_set_ib_mask(void __iomem *csr_base, u32 addr, static u64 xgene_pcie_set_ib_mask(void __iomem *csr_base, u32 addr,