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Diffstat (limited to 'sound/pci/oxygen/oxygen_lib.c')
-rw-r--r--sound/pci/oxygen/oxygen_lib.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 9a8936e20744..9c5e6450eebb 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -278,7 +278,11 @@ oxygen_search_pci_id(struct oxygen *chip, const struct pci_device_id ids[])
static void oxygen_restore_eeprom(struct oxygen *chip,
const struct pci_device_id *id)
{
- if (oxygen_read_eeprom(chip, 0) != OXYGEN_EEPROM_ID) {
+ u16 eeprom_id;
+
+ eeprom_id = oxygen_read_eeprom(chip, 0);
+ if (eeprom_id != OXYGEN_EEPROM_ID &&
+ (eeprom_id != 0xffff || id->subdevice != 0x8788)) {
/*
* This function gets called only when a known card model has
* been detected, i.e., we know there is a valid subsystem
@@ -303,6 +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;
@@ -581,6 +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);