diff options
Diffstat (limited to 'target/linux/imx6/patches-3.12/0030-pcie-designware-fix-io-transfers.patch')
| -rw-r--r-- | target/linux/imx6/patches-3.12/0030-pcie-designware-fix-io-transfers.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-3.12/0030-pcie-designware-fix-io-transfers.patch b/target/linux/imx6/patches-3.12/0030-pcie-designware-fix-io-transfers.patch new file mode 100644 index 0000000000..2445bc7a5d --- /dev/null +++ b/target/linux/imx6/patches-3.12/0030-pcie-designware-fix-io-transfers.patch @@ -0,0 +1,59 @@ +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 + +diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c +--- 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); |