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path: root/sound/pci/oxygen/oxygen_io.c
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Diffstat (limited to 'sound/pci/oxygen/oxygen_io.c')
-rw-r--r--sound/pci/oxygen/oxygen_io.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c
index 3126c4b403d..c1eb923f2ac 100644
--- a/sound/pci/oxygen/oxygen_io.c
+++ b/sound/pci/oxygen/oxygen_io.c
@@ -254,3 +254,34 @@ void oxygen_write_uart(struct oxygen *chip, u8 data)
_write_uart(chip, 0, data);
}
EXPORT_SYMBOL(oxygen_write_uart);
+
+u16 oxygen_read_eeprom(struct oxygen *chip, unsigned int index)
+{
+ unsigned int timeout;
+
+ oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,
+ index | OXYGEN_EEPROM_DIR_READ);
+ for (timeout = 0; timeout < 100; ++timeout) {
+ udelay(1);
+ if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)
+ & OXYGEN_EEPROM_BUSY))
+ break;
+ }
+ return oxygen_read16(chip, OXYGEN_EEPROM_DATA);
+}
+
+void oxygen_write_eeprom(struct oxygen *chip, unsigned int index, u16 value)
+{
+ unsigned int timeout;
+
+ oxygen_write16(chip, OXYGEN_EEPROM_DATA, value);
+ oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,
+ index | OXYGEN_EEPROM_DIR_WRITE);
+ for (timeout = 0; timeout < 10; ++timeout) {
+ msleep(1);
+ if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)
+ & OXYGEN_EEPROM_BUSY))
+ return;
+ }
+ snd_printk(KERN_ERR "EEPROM write timeout\n");
+}