redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

ARM: cns3xxx: Convert PCI to use generic config accessors 

Convert the cns3xxx PCI driver to use the generic config access functions.

This changes accesses from __raw_readl/__raw_writel to readl/writel.

[arnd: remove extra open parenthesis]
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
CC: Russell King <linux@arm.linux.org.uk>
CC: linux-arm-kernel@lists.infradead.org
hifive-unleashed-5.1
Rob Herring 2015-01-09 20:34:40 -06:00 committed by Bjorn Helgaas
parent 1f94a94f67
commit 802b7c06ad
1 changed files with 10 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
arch/arm/mach-cns3xxx/pcie.c
View File

@ -54,8 +54,8 @@ static struct cns3xxx_pcie *pbus_to_cnspci(struct pci_bus *bus)
return sysdata_to_cnspci(bus->sysdata);
}
static void __iomem *cns3xxx_pci_cfg_base(struct pci_bus *bus,
unsigned int devfn, int where)
static void __iomem *cns3xxx_pci_map_bus(struct pci_bus *bus,
unsigned int devfn, int where)
{
struct cns3xxx_pcie *cnspci = pbus_to_cnspci(bus);
int busno = bus->number;
@ -91,55 +91,22 @@ static void __iomem *cns3xxx_pci_cfg_base(struct pci_bus *bus,
static int cns3xxx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
u32 v;
void __iomem *base;
int ret;
u32 mask = (0x1ull << (size * 8)) - 1;
int shift = (where % 4) * 8;
base = cns3xxx_pci_cfg_base(bus, devfn, where);
if (!base) {
*val = 0xffffffff;
return PCIBIOS_SUCCESSFUL;
}
ret = pci_generic_config_read32(bus, devfn, where, size, val);
v = __raw_readl(base);
if (bus->number == 0 && devfn == 0 &&
(where & 0xffc) == PCI_CLASS_REVISION) {
if (ret == PCIBIOS_SUCCESSFUL && !bus->number && !devfn &&
(where & 0xffc) == PCI_CLASS_REVISION)
/*
* RC's class is 0xb, but Linux PCI driver needs 0x604
* for a PCIe bridge. So we must fixup the class code
* to 0x604 here.
*/
v &= 0xff;
v |= 0x604 << 16;
}
*val = ((((*val << shift) & 0xff) | (0x604 << 16)) >> shift) & mask;
*val = (v >> shift) & mask;
return PCIBIOS_SUCCESSFUL;
}
static int cns3xxx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
u32 v;
void __iomem *base;
u32 mask = (0x1ull << (size * 8)) - 1;
int shift = (where % 4) * 8;
base = cns3xxx_pci_cfg_base(bus, devfn, where);
if (!base)
return PCIBIOS_SUCCESSFUL;
v = __raw_readl(base);
v &= ~(mask << shift);
v |= (val & mask) << shift;
__raw_writel(v, base);
return PCIBIOS_SUCCESSFUL;
return ret;
}
static int cns3xxx_pci_setup(int nr, struct pci_sys_data *sys)
@ -158,8 +125,9 @@ static int cns3xxx_pci_setup(int nr, struct pci_sys_data *sys)
}
static struct pci_ops cns3xxx_pcie_ops = {
.map_bus = cns3xxx_pci_map_bus,
.read = cns3xxx_pci_read_config,
.write = cns3xxx_pci_write_config,
.write = pci_generic_config_write,
};
static int cns3xxx_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)