summaryrefslogtreecommitdiff
path: root/sound/pci
diff options
context:
space:
mode:
authorAndy Shevchenko <andy.shevchenko@gmail.com>2014-04-29 11:56:04 +0400
committerTakashi Iwai <tiwai@suse.de>2014-04-29 18:30:15 +0400
commit02fd1a76bfeb8d6293608dc3a1b8667b1da5a923 (patch)
tree74b2c462500d6b6f13378101cc8054ceabff2833 /sound/pci
parent215dacc2811091a9248a3f62164e247aefa39de3 (diff)
downloadlinux-02fd1a76bfeb8d6293608dc3a1b8667b1da5a923.tar.xz
ALSA: fm801: introduce fm801_ac97_is_ready()/fm801_ac97_is_valid() helpers
The introduced functios check AC97 if it's ready for communication and read data is valid. Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/fm801.c79
1 files changed, 42 insertions, 37 deletions
diff --git a/sound/pci/fm801.c b/sound/pci/fm801.c
index 5be910ca35c5..e8910d02580b 100644
--- a/sound/pci/fm801.c
+++ b/sound/pci/fm801.c
@@ -224,6 +224,30 @@ MODULE_DEVICE_TABLE(pci, snd_fm801_ids);
* common I/O routines
*/
+static bool fm801_ac97_is_ready(struct fm801 *chip, unsigned int iterations)
+{
+ unsigned int idx;
+
+ for (idx = 0; idx < iterations; idx++) {
+ if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
+ return true;
+ udelay(10);
+ }
+ return false;
+}
+
+static bool fm801_ac97_is_valid(struct fm801 *chip, unsigned int iterations)
+{
+ unsigned int idx;
+
+ for (idx = 0; idx < iterations; idx++) {
+ if (fm801_readw(chip, AC97_CMD) & FM801_AC97_VALID)
+ return true;
+ udelay(10);
+ }
+ return false;
+}
+
static int snd_fm801_update_bits(struct fm801 *chip, unsigned short reg,
unsigned short mask, unsigned short value)
{
@@ -246,72 +270,53 @@ static void snd_fm801_codec_write(struct snd_ac97 *ac97,
unsigned short val)
{
struct fm801 *chip = ac97->private_data;
- int idx;
/*
* Wait until the codec interface is not ready..
*/
- for (idx = 0; idx < 100; idx++) {
- if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
- goto ok1;
- udelay(10);
+ if (!fm801_ac97_is_ready(chip, 100)) {
+ dev_err(chip->card->dev, "AC'97 interface is busy (1)\n");
+ return;
}
- dev_err(chip->card->dev, "AC'97 interface is busy (1)\n");
- return;
- ok1:
/* write data and address */
fm801_writew(chip, AC97_DATA, val);
fm801_writew(chip, AC97_CMD, reg | (ac97->addr << FM801_AC97_ADDR_SHIFT));
/*
* Wait until the write command is not completed..
- */
- for (idx = 0; idx < 1000; idx++) {
- if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
- return;
- udelay(10);
- }
- dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)\n", ac97->num);
+ */
+ if (!fm801_ac97_is_ready(chip, 1000))
+ dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)\n",
+ ac97->num);
}
static unsigned short snd_fm801_codec_read(struct snd_ac97 *ac97, unsigned short reg)
{
struct fm801 *chip = ac97->private_data;
- int idx;
/*
* Wait until the codec interface is not ready..
*/
- for (idx = 0; idx < 100; idx++) {
- if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
- goto ok1;
- udelay(10);
+ if (!fm801_ac97_is_ready(chip, 100)) {
+ dev_err(chip->card->dev, "AC'97 interface is busy (1)\n");
+ return 0;
}
- dev_err(chip->card->dev, "AC'97 interface is busy (1)\n");
- return 0;
- ok1:
/* read command */
fm801_writew(chip, AC97_CMD,
reg | (ac97->addr << FM801_AC97_ADDR_SHIFT) | FM801_AC97_READ);
- for (idx = 0; idx < 100; idx++) {
- if (!(fm801_readw(chip, AC97_CMD) & FM801_AC97_BUSY))
- goto ok2;
- udelay(10);
+ if (!fm801_ac97_is_ready(chip, 100)) {
+ dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)\n",
+ ac97->num);
+ return 0;
}
- dev_err(chip->card->dev, "AC'97 interface #%d is busy (2)\n", ac97->num);
- return 0;
- ok2:
- for (idx = 0; idx < 1000; idx++) {
- if (fm801_readw(chip, AC97_CMD) & FM801_AC97_VALID)
- goto ok3;
- udelay(10);
+ if (!fm801_ac97_is_valid(chip, 1000)) {
+ dev_err(chip->card->dev,
+ "AC'97 interface #%d is not valid (2)\n", ac97->num);
+ return 0;
}
- dev_err(chip->card->dev, "AC'97 interface #%d is not valid (2)\n", ac97->num);
- return 0;
- ok3:
return fm801_readw(chip, AC97_DATA);
}