summaryrefslogtreecommitdiff
path: root/sound/pci/oxygen/oxygen_lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/pci/oxygen/oxygen_lib.c')
-rw-r--r--sound/pci/oxygen/oxygen_lib.c104
1 files changed, 89 insertions, 15 deletions
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 84f481d41efa..312251d39696 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -34,6 +34,7 @@ MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_DESCRIPTION("C-Media CMI8788 helper library");
MODULE_LICENSE("GPL v2");
+#define DRIVER "oxygen"
static inline int oxygen_uart_input_ready(struct oxygen *chip)
{
@@ -243,6 +244,62 @@ static void oxygen_proc_init(struct oxygen *chip)
#define oxygen_proc_init(chip)
#endif
+static const struct pci_device_id *
+oxygen_search_pci_id(struct oxygen *chip, const struct pci_device_id ids[])
+{
+ u16 subdevice;
+
+ /*
+ * Make sure the EEPROM pins are available, i.e., not used for SPI.
+ * (This function is called before we initialize or use SPI.)
+ */
+ oxygen_clear_bits8(chip, OXYGEN_FUNCTION,
+ OXYGEN_FUNCTION_ENABLE_SPI_4_5);
+ /*
+ * Read the subsystem device ID directly from the EEPROM, because the
+ * chip didn't if the first EEPROM word was overwritten.
+ */
+ subdevice = oxygen_read_eeprom(chip, 2);
+ /*
+ * We use only the subsystem device ID for searching because it is
+ * unique even without the subsystem vendor ID, which may have been
+ * overwritten in the EEPROM.
+ */
+ for (; ids->vendor; ++ids)
+ if (ids->subdevice == subdevice &&
+ ids->driver_data != BROKEN_EEPROM_DRIVER_DATA)
+ return 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;
@@ -446,30 +503,33 @@ static void oxygen_card_free(struct snd_card *card)
free_irq(chip->irq, chip);
flush_scheduled_work();
chip->model.cleanup(chip);
+ kfree(chip->model_data);
mutex_destroy(&chip->mutex);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
}
int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
- const struct oxygen_model *model,
- unsigned long driver_data)
+ struct module *owner,
+ const struct pci_device_id *ids,
+ int (*get_model)(struct oxygen *chip,
+ const struct pci_device_id *id
+ )
+ )
{
struct snd_card *card;
struct oxygen *chip;
+ const struct pci_device_id *pci_id;
int err;
- card = snd_card_new(index, id, model->owner,
- sizeof *chip + model->model_data_size);
- if (!card)
- return -ENOMEM;
+ err = snd_card_create(index, id, owner, sizeof(*chip), &card);
+ if (err < 0)
+ return err;
chip = card->private_data;
chip->card = card;
chip->pci = pci;
chip->irq = -1;
- chip->model = *model;
- chip->model_data = chip + 1;
spin_lock_init(&chip->reg_lock);
mutex_init(&chip->mutex);
INIT_WORK(&chip->spdif_input_bits_work,
@@ -481,7 +541,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
if (err < 0)
goto err_card;
- err = pci_request_regions(pci, model->chip);
+ err = pci_request_regions(pci, DRIVER);
if (err < 0) {
snd_printk(KERN_ERR "cannot reserve PCI resources\n");
goto err_pci_enable;
@@ -495,20 +555,34 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
}
chip->addr = pci_resource_start(pci, 0);
+ pci_id = oxygen_search_pci_id(chip, ids);
+ if (!pci_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;
+
+ if (chip->model.model_data_size) {
+ chip->model_data = kzalloc(chip->model.model_data_size,
+ GFP_KERNEL);
+ if (!chip->model_data) {
+ err = -ENOMEM;
+ goto err_pci_regions;
+ }
+ }
+
pci_set_master(pci);
snd_card_set_dev(card, &pci->dev);
card->private_free = oxygen_card_free;
- if (chip->model.probe) {
- err = chip->model.probe(chip, driver_data);
- if (err < 0)
- goto err_card;
- }
oxygen_init(chip);
chip->model.init(chip);
err = request_irq(pci->irq, oxygen_interrupt, IRQF_SHARED,
- chip->model.chip, chip);
+ DRIVER, chip);
if (err < 0) {
snd_printk(KERN_ERR "cannot grab interrupt %d\n", pci->irq);
goto err_card;