diff options
Diffstat (limited to 'target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch')
| -rw-r--r-- | target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch b/target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch new file mode 100644 index 0000000000..393fd4d5dd --- /dev/null +++ b/target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch @@ -0,0 +1,131 @@ +From 3faf4e1c537de86058fc22a851cd979489b9185e Mon Sep 17 00:00:00 2001 +From: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Date: Wed, 18 Mar 2020 10:44:45 +0100 +Subject: [PATCH] staging: mt7621-pci: fix io space and properly set resource + limits + +Function 'mt7621_pci_parse_request_of_pci_ranges' is using +'of_pci_range_to_resource' to get both mem and io resources. +Internally this function calls to 'pci_address_to_pio' which +returns -1 if io space address is an address > IO_SPACE_LIMIT +which is 0xFFFF for mips. This mt7621 soc has io space in physical +address 0x1e160000. In order to fix this, overwrite invalid io +0xffffffff with properly values from the device tree and set +mapped address of this resource as io port base memory address +calling 'set_io_port_base' function. There is also need to properly +setup resource limits and io and memory windows with properly +parsed values instead of set them as 'no limit' which it is wrong. +For any reason I don't really know legacy driver sets up mem window +as 0xFFFFFFFF and any other value seems to does not work as expected, +so set up also here with same values. + +Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Link: https://lore.kernel.org/r/20200318094445.19669-1-sergio.paracuellos@gmail.com +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/staging/mt7621-pci/pci-mt7621.c | 43 +++++++++++++++++++-------------- + 1 file changed, 25 insertions(+), 18 deletions(-) + +--- a/drivers/staging/mt7621-pci/pci-mt7621.c ++++ b/drivers/staging/mt7621-pci/pci-mt7621.c +@@ -118,6 +118,7 @@ struct mt7621_pcie_port { + * @busn: bus range + * @offset: IO / Memory offset + * @dev: Pointer to PCIe device ++ * @io_map_base: virtual memory base address for io + * @ports: pointer to PCIe port information + * @resets_inverted: depends on chip revision + * reset lines are inverted. +@@ -132,6 +133,7 @@ struct mt7621_pcie { + resource_size_t mem; + resource_size_t io; + } offset; ++ unsigned long io_map_base; + struct list_head ports; + bool resets_inverted; + }; +@@ -291,22 +293,21 @@ static int mt7621_pci_parse_request_of_p + } + + for_each_of_pci_range(&parser, &range) { +- struct resource *res = NULL; +- + switch (range.flags & IORESOURCE_TYPE_BITS) { + case IORESOURCE_IO: +- ioremap(range.cpu_addr, range.size); +- res = &pcie->io; ++ pcie->io_map_base = ++ (unsigned long)ioremap(range.cpu_addr, ++ range.size); ++ of_pci_range_to_resource(&range, node, &pcie->io); ++ pcie->io.start = range.cpu_addr; ++ pcie->io.end = range.cpu_addr + range.size - 1; + pcie->offset.io = 0x00000000UL; + break; + case IORESOURCE_MEM: +- res = &pcie->mem; ++ of_pci_range_to_resource(&range, node, &pcie->mem); + pcie->offset.mem = 0x00000000UL; + break; + } +- +- if (res) +- of_pci_range_to_resource(&range, node, res); + } + + err = of_pci_parse_bus_range(node, &pcie->busn); +@@ -318,6 +319,8 @@ static int mt7621_pci_parse_request_of_p + pcie->busn.flags = IORESOURCE_BUS; + } + ++ set_io_port_base(pcie->io_map_base); ++ + return 0; + } + +@@ -548,6 +551,10 @@ static void mt7621_pcie_enable_ports(str + u32 slot; + u32 val; + ++ /* Setup MEMWIN and IOWIN */ ++ pcie_write(pcie, 0xffffffff, RALINK_PCI_MEMBASE); ++ pcie_write(pcie, pcie->io.start, RALINK_PCI_IOBASE); ++ + list_for_each_entry(port, &pcie->ports, list) { + if (port->enabled) { + mt7621_pcie_port_clk_enable(port); +@@ -668,11 +675,17 @@ static int mt7621_pci_probe(struct platf + return err; + } + ++ err = mt7621_pci_parse_request_of_pci_ranges(pcie); ++ if (err) { ++ dev_err(dev, "Error requesting pci resources from ranges"); ++ goto out_release_gpios; ++ } ++ + /* set resources limits */ +- iomem_resource.start = 0; +- iomem_resource.end = ~0UL; /* no limit */ +- ioport_resource.start = 0; +- ioport_resource.end = ~0UL; /* no limit */ ++ iomem_resource.start = pcie->mem.start; ++ iomem_resource.end = pcie->mem.end; ++ ioport_resource.start = pcie->io.start; ++ ioport_resource.end = pcie->io.end; + + mt7621_pcie_init_ports(pcie); + +@@ -685,12 +698,6 @@ static int mt7621_pci_probe(struct platf + + mt7621_pcie_enable_ports(pcie); + +- err = mt7621_pci_parse_request_of_pci_ranges(pcie); +- if (err) { +- dev_err(dev, "Error requesting pci resources from ranges"); +- goto out_release_gpios; +- } +- + setup_cm_memory_region(pcie); + + err = mt7621_pcie_request_resources(pcie, &res); |