v3.65 version of the designware h/w, requires application space
registers to be configured to access the remote EP config space.
To support this, add rd[wr]_other_conf API in the pcie_host_opts
Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
CC: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
CC: Russell King <linux@xxxxxxxxxxxxxxxx>
CC: Grant Likely <grant.likely@xxxxxxxxxx>
CC: Rob Herring <robh+dt@xxxxxxxxxx>
CC: Mohit Kumar <mohit.kumar@xxxxxx>
CC: Jingoo Han <jg1.han@xxxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Pratyush Anand <pratyush.anand@xxxxxx>
CC: Richard Zhu <r65037@xxxxxxxxxxxxx>
CC: Kishon Vijay Abraham I <kishon@xxxxxx>
CC: Marek Vasut <marex@xxxxxxx>
CC: Arnd Bergmann <arnd@xxxxxxxx>
CC: Pawel Moll <pawel.moll@xxxxxxx>
CC: Mark Rutland <mark.rutland@xxxxxxx>
CC: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
CC: Kumar Gala <galak@xxxxxxxxxxxxxx>
CC: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
CC: Grant Likely <grant.likely@xxxxxxxxxx>
---
drivers/pci/host/pcie-designware.c | 12 ++++++++++--
drivers/pci/host/pcie-designware.h | 4 ++++
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index c4e3732..e8f5d8d 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -654,7 +654,11 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
spin_lock_irqsave(&pp->conf_lock, flags);
if (bus->number != pp->root_bus_nr)
- ret = dw_pcie_rd_other_conf(pp, bus, devfn,
+ 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);
@@ -680,7 +684,11 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
spin_lock_irqsave(&pp->conf_lock, flags);
if (bus->number != pp->root_bus_nr)
- ret = dw_pcie_wr_other_conf(pp, bus, devfn,
+ 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);
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index 3063b35..2d6dd66 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -62,6 +62,10 @@ struct pcie_host_ops {
u32 val, void __iomem *dbi_base);
int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
+ int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+ unsigned int devfn, int where, int size, u32 *val);
+ int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+ unsigned int devfn, int where, int size, u32 val);
int (*link_up)(struct pcie_port *pp);
void (*host_init)(struct pcie_port *pp);
};
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-doc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
