From 24bfedbd0be4dcaa94861407820d6a70fea7e03b Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 22 Apr 2008 12:20:32 +0200 Subject: ppc4xx: Pass PCIe root-complex/endpoint configuration to Linux via the fdt The PCIe root-complex/endpoint setup as configured via the "pcie_mode" environment variable will now get passed to the Linux kernel by setting the device_type property of the PCIe device tree node. For normal root- complex configuration it will keep its defaults value of "pci" and for endpoint configuration it will get changed to "pci-endpoint". Signed-off-by: Stefan Roese --- cpu/ppc4xx/fdt.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'cpu') diff --git a/cpu/ppc4xx/fdt.c b/cpu/ppc4xx/fdt.c index afcb974..1f4d6f2 100644 --- a/cpu/ppc4xx/fdt.c +++ b/cpu/ppc4xx/fdt.c @@ -31,9 +31,46 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; +/* + * Fixup all PCIe nodes by setting the device_type property + * to "pci-endpoint" instead is "pci" for endpoint ports. + * This property will get checked later by the Linux driver + * to properly configure the PCIe port in Linux (again). + */ +void fdt_pcie_setup(void *blob) +{ + const char *compat = "ibm,plb-pciex"; + const char *prop = "device_type"; + const char *prop_val = "pci-endpoint"; + const u32 *port; + int no; + int rc; + + /* Search first PCIe node */ + no = fdt_node_offset_by_compatible(blob, -1, compat); + while (no != -FDT_ERR_NOTFOUND) { + port = fdt_getprop(blob, no, "port", NULL); + if (port == NULL) { + printf("WARNING: could not find port property\n"); + } else { + if (is_end_point(*port)) { + rc = fdt_setprop(blob, no, prop, prop_val, + strlen(prop_val) + 1); + if (rc < 0) + printf("WARNING: could not set %s for %s: %s.\n", + prop, compat, fdt_strerror(rc)); + } + } + + /* Jump to next PCIe node */ + no = fdt_node_offset_by_compatible(blob, no, compat); + } +} + void ft_cpu_setup(void *blob, bd_t *bd) { sys_info_t sys_info; @@ -60,5 +97,10 @@ void ft_cpu_setup(void *blob, bd_t *bd) * Note: aliases in the dts are required for this */ fdt_fixup_ethernet(blob, bd); + + /* + * Fixup all available PCIe nodes by setting the device_type property + */ + fdt_pcie_setup(blob); } #endif /* CONFIG_OF_LIBFDT */ -- cgit v1.1