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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/pci/host/pcie-designware.c
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/pci/host/pcie-designware.c')
-rw-r--r--drivers/pci/host/pcie-designware.c62
1 files changed, 26 insertions, 36 deletions
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 02a7452bd..217168278 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -128,32 +128,26 @@ static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg)
static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
- int ret;
-
if (pp->ops->rd_own_conf)
- ret = pp->ops->rd_own_conf(pp, where, size, val);
- else
- ret = dw_pcie_cfg_read(pp->dbi_base + where, size, val);
+ return pp->ops->rd_own_conf(pp, where, size, val);
- return ret;
+ return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
}
static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
u32 val)
{
- int ret;
-
if (pp->ops->wr_own_conf)
- ret = pp->ops->wr_own_conf(pp, where, size, val);
- else
- ret = dw_pcie_cfg_write(pp->dbi_base + where, size, val);
+ return pp->ops->wr_own_conf(pp, where, size, val);
- return ret;
+ return dw_pcie_cfg_write(pp->dbi_base + where, size, val);
}
static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
int type, u64 cpu_addr, u64 pci_addr, u32 size)
{
+ u32 val;
+
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr), PCIE_ATU_LOWER_BASE);
@@ -164,6 +158,12 @@ static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
dw_pcie_writel_rc(pp, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+
+ /*
+ * Make sure ATU enable takes effect before any subsequent config
+ * and I/O accesses.
+ */
+ dw_pcie_readl_rc(pp, PCIE_ATU_CR2, &val);
}
static struct irq_chip dw_msi_irq_chip = {
@@ -384,8 +384,8 @@ int dw_pcie_link_up(struct pcie_port *pp)
{
if (pp->ops->link_up)
return pp->ops->link_up(pp);
- else
- return 0;
+
+ return 0;
}
static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
@@ -571,6 +571,9 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u64 cpu_addr;
void __iomem *va_cfg_base;
+ if (pp->ops->rd_other_conf)
+ return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
+
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
@@ -605,6 +608,9 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u64 cpu_addr;
void __iomem *va_cfg_base;
+ if (pp->ops->wr_other_conf)
+ return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
+
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
@@ -658,46 +664,30 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
struct pcie_port *pp = bus->sysdata;
- int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
- if (bus->number != pp->root_bus_nr)
- if (pp->ops->rd_other_conf)
- ret = pp->ops->rd_other_conf(pp, bus, devfn,
- where, size, val);
- else
- ret = dw_pcie_rd_other_conf(pp, bus, devfn,
- where, size, val);
- else
- ret = dw_pcie_rd_own_conf(pp, where, size, val);
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_rd_own_conf(pp, where, size, val);
- return ret;
+ return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
}
static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
struct pcie_port *pp = bus->sysdata;
- int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
- if (bus->number != pp->root_bus_nr)
- if (pp->ops->wr_other_conf)
- ret = pp->ops->wr_other_conf(pp, bus, devfn,
- where, size, val);
- else
- ret = dw_pcie_wr_other_conf(pp, bus, devfn,
- where, size, val);
- else
- ret = dw_pcie_wr_own_conf(pp, where, size, val);
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_wr_own_conf(pp, where, size, val);
- return ret;
+ return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
}
static struct pci_ops dw_pcie_ops = {