aboutsummaryrefslogtreecommitdiff
path: root/sound/atmel
diff options
context:
space:
mode:
authorHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2009-04-02 08:21:15 +0200
committerTakashi Iwai <tiwai@suse.de>2009-04-06 03:55:42 +0200
commit81baf3a7f686c5d22359cb06fc11d20907ba12f8 (patch)
treeb4f13bce4e1af868ed7672646e56682d18d0a2b1 /sound/atmel
parentdf163587eab15a24cc34cf8434a5657416f8a203 (diff)
downloadlinux-81baf3a7f686c5d22359cb06fc11d20907ba12f8.tar.gz
ALSA: snd-atmel-ac97c: do a proper reset of the external codec
This patch will enable the AC97C before resetting the external codec, leaving the AC97C disabled will result in floating I/O lines that can affect the reset procedure. Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/atmel')
-rw-r--r--sound/atmel/ac97c.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index e8484cb9ac6..90527c14901 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -730,17 +730,17 @@ static bool filter(struct dma_chan *chan, void *slave)
static void atmel_ac97c_reset(struct atmel_ac97c *chip)
{
- ac97c_writel(chip, MR, AC97C_MR_WRST);
+ ac97c_writel(chip, MR, 0);
+ ac97c_writel(chip, MR, AC97C_MR_ENA);
+ ac97c_writel(chip, CAMR, 0);
+ ac97c_writel(chip, COMR, 0);
if (gpio_is_valid(chip->reset_pin)) {
gpio_set_value(chip->reset_pin, 0);
/* AC97 v2.2 specifications says minimum 1 us. */
- udelay(10);
+ udelay(2);
gpio_set_value(chip->reset_pin, 1);
}
-
- udelay(1);
- ac97c_writel(chip, MR, AC97C_MR_ENA);
}
static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
@@ -826,6 +826,8 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
snd_card_set_dev(card, &pdev->dev);
+ atmel_ac97c_reset(chip);
+
/* Enable overrun interrupt from codec channel */
ac97c_writel(chip, COMR, AC97C_CSR_OVRUN);
ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT);
@@ -836,8 +838,6 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
goto err_ac97_bus;
}
- atmel_ac97c_reset(chip);
-
retval = atmel_ac97c_mixer_new(chip);
if (retval) {
dev_dbg(&pdev->dev, "could not register ac97 mixer\n");