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| author | Clemens Ladisch <clemens@ladisch.de> | 2009-09-28 11:05:58 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-09-28 11:53:30 +0200 |
| commit | 362bc24d6746bcd49bb4853fc5aa7d4c728b3f9e (patch) | |
| tree | b9687fdf6129d3e6896ccc693c8065f31e032245 /sound/pci/oxygen | |
| parent | 87b61902ce3dec23a2d8256b9cfcf4e28786a320 (diff) | |
| download | blackbird-op-linux-362bc24d6746bcd49bb4853fc5aa7d4c728b3f9e.tar.gz blackbird-op-linux-362bc24d6746bcd49bb4853fc5aa7d4c728b3f9e.zip | |
sound: oxygen: fix for PI7C9X110 compatibility
If the card is used with a Pericom PI7C9X110 PCI-E/PCI bridge,
reconfigure the latter's PCI buffering to fix an unknown problem.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/oxygen')
| -rw-r--r-- | sound/pci/oxygen/oxygen_lib.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c index c9f271419eb8..9c5e6450eebb 100644 --- a/sound/pci/oxygen/oxygen_lib.c +++ b/sound/pci/oxygen/oxygen_lib.c @@ -307,6 +307,28 @@ static void oxygen_restore_eeprom(struct oxygen *chip, } } +static void pci_bridge_magic(void) +{ + struct pci_dev *pci = NULL; + u32 tmp; + + for (;;) { + /* If there is any Pericom PI7C9X110 PCI-E/PCI bridge ... */ + pci = pci_get_device(0x12d8, 0xe110, pci); + if (!pci) + break; + /* + * ... configure its secondary internal arbiter to park to + * the secondary port, instead of to the last master. + */ + if (!pci_read_config_dword(pci, 0x40, &tmp)) { + tmp |= 1; + pci_write_config_dword(pci, 0x40, tmp); + } + /* Why? Try asking C-Media. */ + } +} + static void oxygen_init(struct oxygen *chip) { unsigned int i; @@ -585,6 +607,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id, snd_card_set_dev(card, &pci->dev); card->private_free = oxygen_card_free; + pci_bridge_magic(); oxygen_init(chip); chip->model.init(chip); |
