src/arch/x86/lib/pci_ops_conf1.c

   1 #include <console/console.h>
   2 #include <arch/io.h>
   3 #include <arch/pciconf.h>
   4 #include <device/pci.h>
   5 #include <device/pci_ids.h>
   6 #include <device/pci_ops.h>
   7 /*
   8  * Functions for accessing PCI configuration space with type 1 accesses
   9  */
  10
  11 #if CONFIG_PCI_IO_CFG_EXT == 0
  12 #define CONFIG_CMD(bus,devfn, where)    (0x80000000 | (bus << 16) | \
  13                                                                                 (devfn << 8) | (where & ~3))
  14 #else
  15 #define CONFIG_CMD(bus,devfn, where)    (0x80000000 | (bus << 16) | \
  16                                                                                 (devfn << 8) | ((where & 0xff) & ~3) |\
  17                                                                                 ((where & 0xf00)<<16))
  18 #endif
  19
  20 static uint8_t pci_conf1_read_config8(struct bus *pbus, int bus, int devfn,
  21                                       int where)
  22 {
  23         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  24         return inb(0xCFC + (where & 3));
  25 }
  26
  27 static uint16_t pci_conf1_read_config16(struct bus *pbus, int bus, int devfn,
  28                                         int where)
  29 {
  30         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  31         return inw(0xCFC + (where & 2));
  32 }
  33
  34 static uint32_t pci_conf1_read_config32(struct bus *pbus, int bus, int devfn,
  35                                         int where)
  36 {
  37         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  38         return inl(0xCFC);
  39 }
  40
  41 static void pci_conf1_write_config8(struct bus *pbus, int bus, int devfn,
  42                                     int where, uint8_t value)
  43 {
  44         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  45         outb(value, 0xCFC + (where & 3));
  46 }
  47
  48 static void pci_conf1_write_config16(struct bus *pbus, int bus, int devfn,
  49                                      int where, uint16_t value)
  50 {
  51         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  52         outw(value, 0xCFC + (where & 2));
  53 }
  54
  55 static void pci_conf1_write_config32(struct bus *pbus, int bus, int devfn,
  56                                      int where, uint32_t value)
  57 {
  58         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  59         outl(value, 0xCFC);
  60 }
  61
  62 #undef CONFIG_CMD
  63
  64 const struct pci_bus_operations pci_cf8_conf1 = {
  65         .read8 = pci_conf1_read_config8,
  66         .read16 = pci_conf1_read_config16,
  67         .read32 = pci_conf1_read_config32,
  68         .write8 = pci_conf1_write_config8,
  69         .write16 = pci_conf1_write_config16,
  70         .write32 = pci_conf1_write_config32,
  71 };