diff options
Diffstat (limited to 'target/linux/ramips/patches-4.3/0061-mt7621-set-up-pci-memory-region.patch')
| -rw-r--r-- | target/linux/ramips/patches-4.3/0061-mt7621-set-up-pci-memory-region.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.3/0061-mt7621-set-up-pci-memory-region.patch b/target/linux/ramips/patches-4.3/0061-mt7621-set-up-pci-memory-region.patch new file mode 100644 index 0000000000..e6338a9478 --- /dev/null +++ b/target/linux/ramips/patches-4.3/0061-mt7621-set-up-pci-memory-region.patch @@ -0,0 +1,42 @@ +--- a/arch/mips/pci/pci-mt7621.c ++++ b/arch/mips/pci/pci-mt7621.c +@@ -46,6 +46,7 @@ + #include <linux/version.h> + #include <asm/pci.h> + #include <asm/io.h> ++#include <asm/mips-cm.h> + #include <linux/init.h> + #include <linux/module.h> + #include <linux/delay.h> +@@ -553,6 +554,23 @@ set_phy_for_ssc(void) + #endif + } + ++void setup_cm_memory_region(struct resource *mem_resource) ++{ ++ resource_size_t mask; ++ if (mips_cm_numiocu()) { ++ /* FIXME: hardware doesn't accept mask values with 1s after ++ 0s (e.g. 0xffef), so it would be great to warn if that's ++ about to happen */ ++ mask = ~(mem_resource->end - mem_resource->start); ++ ++ write_gcr_reg1_base(mem_resource->start); ++ write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); ++ printk("PCI coherence region base: 0x%08lx, mask/settings: 0x%08lx\n", ++ read_gcr_reg1_base(), ++ read_gcr_reg1_mask()); ++ } ++} ++ + static int mt7621_pci_probe(struct platform_device *pdev) + { + unsigned long val = 0; +@@ -780,6 +798,7 @@ pcie(2/1/0) link status pcie2_num pcie1_ + } + + pci_load_of_ranges(&mt7621_controller, pdev->dev.of_node); ++ setup_cm_memory_region(mt7621_controller.mem_resource); + register_pci_controller(&mt7621_controller); + return 0; + |