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From: Pratyush Anand <pratyush.anand@st.com>
pp->io_base which is the input of the outbound IO address translation
unit should be the cpu address, it was programmed wrongly to realio
address.
We should pass global_io_offset rather than sys->io_offset to
pci_ioremap_io, so we map the new window into the first available spot
in the Linux view of the I/O space.
We must also pass cpu address instead of realio address to
pci_ioremap_io.
This patch fixes above issue. It has been tested with Lecroy PTC in AIC
mode and Pericom PI7C9X2G303EL PCIe switch, which does not work
otherwise.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Tested-by: Mohit Kumar <mohit.kumar@st.com>
Tested-by: Tim Harvey <tharvey@gateworks.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Richard Zhu <Hong-Xing.Zhu@freescale.com>
Cc: linux-pci@vger.kernel.org
Cc: spear-devel@list.st.com
---
drivers/pci/host/pcie-designware.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
http://thread.gmane.org/gmane.linux.kernel.pci/27204
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -177,6 +177,7 @@ int __init dw_pcie_host_init(struct pcie
+ global_io_offset);
pp->config.io_size = resource_size(&pp->io);
pp->config.io_bus_addr = range.pci_addr;
+ pp->io_base = range.cpu_addr;
}
if (restype == IORESOURCE_MEM) {
of_pci_range_to_resource(&range, np, &pp->mem);
@@ -202,7 +203,6 @@ int __init dw_pcie_host_init(struct pcie
pp->cfg0_base = pp->cfg.start;
pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
- pp->io_base = pp->io.start;
pp->mem_base = pp->mem.start;
pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
@@ -449,7 +449,7 @@ int dw_pcie_setup(int nr, struct pci_sys
if (global_io_offset < SZ_1M && pp->config.io_size > 0) {
sys->io_offset = global_io_offset - pp->config.io_bus_addr;
- pci_ioremap_io(sys->io_offset, pp->io.start);
+ pci_ioremap_io(global_io_offset, pp->io_base);
global_io_offset += SZ_64K;
pci_add_resource_offset(&sys->resources, &pp->io,
sys->io_offset);
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