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         printk(BIOS_INFO, "%s: bus: 0x%2x, devfn: 0x%2x, where: 0x%2x\n", __func__, bus, devfn, where);
  38         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  39         return inl(0xCFC);
  40 }
  41
  42 static void pci_conf1_write_config8(struct bus *pbus, int bus, int devfn,
  43                                     int where, uint8_t value)
  44 {
  45         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  46         outb(value, 0xCFC + (where & 3));
  47 }
  48
  49 static void pci_conf1_write_config16(struct bus *pbus, int bus, int devfn,
  50                                      int where, uint16_t value)
  51 {
  52         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  53         outw(value, 0xCFC + (where & 2));
  54 }
  55
  56 static void pci_conf1_write_config32(struct bus *pbus, int bus, int devfn,
  57                                      int where, uint32_t value)
  58 {
  59         outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
  60         outl(value, 0xCFC);
  61 }
  62
  63 #undef CONFIG_CMD
  64
  65 const struct pci_bus_operations pci_cf8_conf1 = {
  66         .read8 = pci_conf1_read_config8,
  67         .read16 = pci_conf1_read_config16,
  68         .read32 = pci_conf1_read_config32,
  69         .write8 = pci_conf1_write_config8,
  70         .write16 = pci_conf1_write_config16,
  71         .write32 = pci_conf1_write_config32,
  72 };