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authorBrian Bloniarz <brian.bloniarz@gmail.com>2011-01-17 23:20:03 -0800
committerTakashi Iwai <tiwai@suse.de>2011-01-18 15:25:16 +0100
commitb8b1a4cb6842fb33769be1ad636f062d31d588c3 (patch)
tree4da490ba5218e1a0e3b6fe9b200c9cbbb49bb247 /sound
parent27de094f54a4d96bae2cd3121eb157bb8a34f729 (diff)
downloadlinux-b8b1a4cb6842fb33769be1ad636f062d31d588c3.tar.bz2
ALSA: ice1712 delta - initialize SPI clock
The driver was using an initial value for the clock on the SPI bus which was read from ICE1712 EEPROM, ice->eeprom.data[ICE_EEP1_GPIO_STATE] & ICE1712_DELTA_AP_CCLK (0x02) It appears some cards have it default high, some cards have it default low. On my Delta 66 rev. E: $ cat /proc/asound/M66/ice1712 | grep 'GPIO state' GPIO state : 0x70 /* ICE1712_DELTA_AP_CCLK bit is zero */ On my Audiophile 2496: $ cat /proc/asound/M2496/ice1712 | grep 'GPIO state' GPIO state : 0xfe /* ICE1712_DELTA_AP_CCLK bit is one */ It must be raised before the first SPI write happens, or the write will fail, leading to: [ 23.248721] invalid CS8427 signature 0x0: let me try again... I theorize that 4eb4550ab37d351ab0973ccec921a5a2d8560ec7 is no longer needed, it was a different way to workaround the problem. [fixed variable decleration by tiwai] Signed-off-by: Brian Bloniarz <brian.bloniarz@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/ice1712/delta.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/pci/ice1712/delta.c b/sound/pci/ice1712/delta.c
index 7b62de089fee..20c6b079d0df 100644
--- a/sound/pci/ice1712/delta.c
+++ b/sound/pci/ice1712/delta.c
@@ -580,6 +580,7 @@ static int __devinit snd_ice1712_delta_init(struct snd_ice1712 *ice)
{
int err;
struct snd_akm4xxx *ak;
+ unsigned char tmp;
if (ice->eeprom.subvendor == ICE1712_SUBDEVICE_DELTA1010 &&
ice->eeprom.gpiodir == 0x7b)
@@ -622,6 +623,12 @@ static int __devinit snd_ice1712_delta_init(struct snd_ice1712 *ice)
break;
}
+ /* initialize the SPI clock to high */
+ tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
+ tmp |= ICE1712_DELTA_AP_CCLK;
+ snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
+ udelay(5);
+
/* initialize spdif */
switch (ice->eeprom.subvendor) {
case ICE1712_SUBDEVICE_AUDIOPHILE: