diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/fdtdec.h | 109 |
1 files changed, 98 insertions, 11 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h index 5effa24..75af750 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -15,6 +15,7 @@ */ #include <libfdt.h> +#include <pci.h> /* * A typedef for a physical address. Note that fdt data is always big @@ -50,6 +51,49 @@ struct fdt_resource { fdt_addr_t end; }; +enum fdt_pci_space { + FDT_PCI_SPACE_CONFIG = 0, + FDT_PCI_SPACE_IO = 0x01000000, + FDT_PCI_SPACE_MEM32 = 0x02000000, + FDT_PCI_SPACE_MEM64 = 0x03000000, + FDT_PCI_SPACE_MEM32_PREF = 0x42000000, + FDT_PCI_SPACE_MEM64_PREF = 0x43000000, +}; + +#define FDT_PCI_ADDR_CELLS 3 +#define FDT_PCI_SIZE_CELLS 2 +#define FDT_PCI_REG_SIZE \ + ((FDT_PCI_ADDR_CELLS + FDT_PCI_SIZE_CELLS) * sizeof(u32)) + +/* + * The Open Firmware spec defines PCI physical address as follows: + * + * bits# 31 .... 24 23 .... 16 15 .... 08 07 .... 00 + * + * phys.hi cell: npt000ss bbbbbbbb dddddfff rrrrrrrr + * phys.mid cell: hhhhhhhh hhhhhhhh hhhhhhhh hhhhhhhh + * phys.lo cell: llllllll llllllll llllllll llllllll + * + * where: + * + * n: is 0 if the address is relocatable, 1 otherwise + * p: is 1 if addressable region is prefetchable, 0 otherwise + * t: is 1 if the address is aliased (for non-relocatable I/O) below 1MB + * (for Memory), or below 64KB (for relocatable I/O) + * ss: is the space code, denoting the address space + * bbbbbbbb: is the 8-bit Bus Number + * ddddd: is the 5-bit Device Number + * fff: is the 3-bit Function Number + * rrrrrrrr: is the 8-bit Register Number + * hhhhhhhh: is a 32-bit unsigned number + * llllllll: is a 32-bit unsigned number + */ +struct fdt_pci_addr { + u32 phys_hi; + u32 phys_mid; + u32 phys_lo; +}; + /** * Compute the size of a resource. * @@ -258,6 +302,60 @@ fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, const char *prop_name, fdt_size_t *sizep); /** + * Look at an address property in a node and return the pci address which + * corresponds to the given type in the form of fdt_pci_addr. + * The property must hold one fdt_pci_addr with a lengh. + * + * @param blob FDT blob + * @param node node to examine + * @param type pci address type (FDT_PCI_SPACE_xxx) + * @param prop_name name of property to find + * @param addr returns pci address in the form of fdt_pci_addr + * @return 0 if ok, negative on error + */ +int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, + const char *prop_name, struct fdt_pci_addr *addr); + +/** + * Look at the compatible property of a device node that represents a PCI + * device and extract pci vendor id and device id from it. + * + * @param blob FDT blob + * @param node node to examine + * @param vendor vendor id of the pci device + * @param device device id of the pci device + * @return 0 if ok, negative on error + */ +int fdtdec_get_pci_vendev(const void *blob, int node, + u16 *vendor, u16 *device); + +/** + * Look at the pci address of a device node that represents a PCI device + * and parse the bus, device and function number from it. + * + * @param blob FDT blob + * @param node node to examine + * @param addr pci address in the form of fdt_pci_addr + * @param bdf returns bus, device, function triplet + * @return 0 if ok, negative on error + */ +int fdtdec_get_pci_bdf(const void *blob, int node, + struct fdt_pci_addr *addr, pci_dev_t *bdf); + +/** + * Look at the pci address of a device node that represents a PCI device + * and return base address of the pci device's registers. + * + * @param blob FDT blob + * @param node node to examine + * @param addr pci address in the form of fdt_pci_addr + * @param bar returns base address of the pci device's registers + * @return 0 if ok, negative on error + */ +int fdtdec_get_pci_bar32(const void *blob, int node, + struct fdt_pci_addr *addr, u32 *bar); + +/** * Look up a 32-bit integer property in a node and return it. The property * must have at least 4 bytes of data. The value of the first cell is * returned. @@ -683,17 +781,6 @@ int fdt_get_named_resource(const void *fdt, int node, const char *property, struct fdt_resource *res); /** - * Look at the reg property of a device node that represents a PCI device - * and parse the bus, device and function number from it. - * - * @param fdt FDT blob - * @param node node to examine - * @param bdf returns bus, device, function triplet - * @return 0 if ok, negative on error - */ -int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf); - -/** * Decode a named region within a memory bank of a given type. * * This function handles selection of a memory region. The region is |