diff options
| author | Daniel Hellstrom <daniel@gaisler.com> | 2013-07-01 15:00:21 +0200 |
|---|---|---|
| committer | Daniel Hellstrom <daniel@gaisler.com> | 2015-04-17 01:10:20 +0200 |
| commit | 51347053b8fa490f2e5a20ce0693ef32dc6a3018 (patch) | |
| tree | 6cf4488afc5343efac529f61483c86352ac1a4a9 /c/src/lib/libbsp/sparc/shared/pci/grpci2.c | |
| parent | APBUART: debug bit was cleared incorrectly (diff) | |
| download | rtems-51347053b8fa490f2e5a20ce0693ef32dc6a3018.tar.bz2 | |
LEON PCI: host bridge driver support for probing dev0=AD16
Before the LIBPCI didn't probe device0 (AD16), the host bridge
drivers used bus=dev=func=0 to internally probe the host bridge's
target interface. Now that LIBPCI uses bus=dev=func=0 to access
device0, bus=0xff is introduced internally to identify the
host bridge target configuration space.
Diffstat (limited to 'c/src/lib/libbsp/sparc/shared/pci/grpci2.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/shared/pci/grpci2.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/c/src/lib/libbsp/sparc/shared/pci/grpci2.c b/c/src/lib/libbsp/sparc/shared/pci/grpci2.c index 5886336982..29af4ab756 100644 --- a/c/src/lib/libbsp/sparc/shared/pci/grpci2.c +++ b/c/src/lib/libbsp/sparc/shared/pci/grpci2.c @@ -196,6 +196,9 @@ struct grpci2_cap_first { #define CAP9_BARSIZE_OFS 0x24 #define CAP9_AHBPREF_OFS 0x3C +/* Used internally for accessing the PCI bridge's configuration space itself */ +#define HOST_TGT PCI_DEV(0xff, 0, 0) + struct grpci2_priv *grpci2priv = NULL; /* PCI Interrupt assignment. Connects an PCI interrupt pin (INTA#..INTD#) @@ -310,7 +313,9 @@ int grpci2_cfg_r32(pci_dev_t dev, int ofs, uint32_t *val) /* GRPCI2 can access "non-standard" devices on bus0 (on AD11.AD16), * we skip them. */ - if (bus == 0 && PCI_DEV_SLOT(dev) != 0) + if (dev == HOST_TGT) + bus = devfn = 0; + else if (bus == 0) devfn = PCI_DEV_DEVFUNC(dev) + PCI_DEV(0, 6, 0); else devfn = PCI_DEV_DEVFUNC(dev); @@ -398,7 +403,9 @@ int grpci2_cfg_w32(pci_dev_t dev, int ofs, uint32_t val) /* GRPCI2 can access "non-standard" devices on bus0 (on AD11.AD16), * we skip them. */ - if (bus == 0 && PCI_DEV_SLOT(dev) != 0) + if (dev == HOST_TGT) + bus = devfn = 0; + if (bus == 0) devfn = PCI_DEV_DEVFUNC(dev) + PCI_DEV(0, 6, 0); else devfn = PCI_DEV_DEVFUNC(dev); @@ -627,7 +634,7 @@ int grpci2_hw_init(struct grpci2_priv *priv) int i; uint8_t capptr; uint32_t data, io_map, ahbadr, pciadr, size; - pci_dev_t host = PCI_DEV(0, 0, 0); + pci_dev_t host = HOST_TGT; struct grpci2_pcibar_cfg *barcfg = priv->barcfg; /* Reset any earlier setup */ |