From 1275d6f608abda23d101ada17dc39940192d4bc4 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Thu, 19 Feb 2009 08:44:12 +0100 Subject: sound: oxygen: automatically restore overwritten EEPROM If the EEPROM was partially overwritten (which seems to happen before the OS is booted), restore its entire contents by deducing it from the remaining information. This does not have any effect on the Linux driver, which works even with incomplete information in the EEPROM, but it makes other drivers work again. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai --- sound/pci/oxygen/oxygen_io.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'sound/pci/oxygen/oxygen_io.c') diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c index 05f48ef1a442..c1eb923f2ac9 100644 --- a/sound/pci/oxygen/oxygen_io.c +++ b/sound/pci/oxygen/oxygen_io.c @@ -269,3 +269,19 @@ u16 oxygen_read_eeprom(struct oxygen *chip, unsigned int index) } 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"); +} -- cgit v1.2.3