diff options
Diffstat (limited to 'sound/pci/oxygen/oxygen_lib.c')
| -rw-r--r-- | sound/pci/oxygen/oxygen_lib.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c index d83c3a9..6e1cdd2 100644 --- a/sound/pci/oxygen/oxygen_lib.c +++ b/sound/pci/oxygen/oxygen_lib.c @@ -272,6 +272,34 @@ oxygen_search_pci_id(struct oxygen *chip, const struct pci_device_id ids[]) return NULL; } +static void oxygen_restore_eeprom(struct oxygen *chip, + const struct pci_device_id *id) +{ + if (oxygen_read_eeprom(chip, 0) != OXYGEN_EEPROM_ID) { + /* + * This function gets called only when a known card model has + * been detected, i.e., we know there is a valid subsystem + * product ID at index 2 in the EEPROM. Therefore, we have + * been able to deduce the correct subsystem vendor ID, and + * this is enough information to restore the original EEPROM + * contents. + */ + oxygen_write_eeprom(chip, 1, id->subvendor); + oxygen_write_eeprom(chip, 0, OXYGEN_EEPROM_ID); + + oxygen_set_bits8(chip, OXYGEN_MISC, + OXYGEN_MISC_WRITE_PCI_SUBID); + pci_write_config_word(chip->pci, PCI_SUBSYSTEM_VENDOR_ID, + id->subvendor); + pci_write_config_word(chip->pci, PCI_SUBSYSTEM_ID, + id->subdevice); + oxygen_clear_bits8(chip, OXYGEN_MISC, + OXYGEN_MISC_WRITE_PCI_SUBID); + + snd_printk(KERN_INFO "EEPROM ID restored\n"); + } +} + static void oxygen_init(struct oxygen *chip) { unsigned int i; @@ -532,6 +560,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id, err = -ENODEV; goto err_pci_regions; } + oxygen_restore_eeprom(chip, pci_id); err = get_model(chip, pci_id); if (err < 0) goto err_pci_regions; |