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authorKrzysztof Helt <krzysztof.h1@wp.pl>2007-09-06 17:03:22 +0400
committerJaroslav Kysela <perex@perex.cz>2007-10-16 18:49:09 +0400
commit8e6a2c2ec9e7c99128425e6b73bea8437efd3a93 (patch)
tree8baf0a743f66f83a9b03436f172d5cf89bce01d0 /sound/isa/ad1848
parentef285fe6ef3620fbac5d7fc4c0560e276adb0fc2 (diff)
downloadlinux-8e6a2c2ec9e7c99128425e6b73bea8437efd3a93.tar.xz
[ALSA] ad1848_lib: replace common delay loop by function
This patch replaces a common delay loop by a function. It also uses ARRAY_SIZE macro for the rates table. Acked-by: Rene Herman <rene.herman@gmail.com> Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/isa/ad1848')
-rw-r--r--sound/isa/ad1848/ad1848_lib.c46
1 files changed, 24 insertions, 22 deletions
diff --git a/sound/isa/ad1848/ad1848_lib.c b/sound/isa/ad1848/ad1848_lib.c
index 1bc2e3fd5721..f01e564b1238 100644
--- a/sound/isa/ad1848/ad1848_lib.c
+++ b/sound/isa/ad1848/ad1848_lib.c
@@ -70,7 +70,7 @@ static unsigned int rates[14] = {
};
static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
- .count = 14,
+ .count = ARRAY_SIZE(rates),
.list = rates,
.mask = 0,
};
@@ -99,24 +99,32 @@ static unsigned char snd_ad1848_original_image[16] =
* Basic I/O functions
*/
-void snd_ad1848_out(struct snd_ad1848 *chip,
- unsigned char reg,
- unsigned char value)
+static void snd_ad1848_wait(struct snd_ad1848 *chip)
{
int timeout;
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
+ for (timeout = 250; timeout > 0; timeout--) {
+ if ((inb(AD1848P(chip, REGSEL)) & AD1848_INIT) == 0)
+ break;
udelay(100);
+ }
+}
+
+void snd_ad1848_out(struct snd_ad1848 *chip,
+ unsigned char reg,
+ unsigned char value)
+{
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
- snd_printk(KERN_WARNING "auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
+ snd_printk(KERN_WARNING "auto calibration time out - "
+ "reg = 0x%x, value = 0x%x\n", reg, value);
#endif
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
outb(chip->image[reg] = value, AD1848P(chip, REG));
mb();
-#if 0
- printk("codec out - reg 0x%x = 0x%x\n", chip->mce_bit | reg, value);
-#endif
+ snd_printdd("codec out - reg 0x%x = 0x%x\n",
+ chip->mce_bit | reg, value);
}
EXPORT_SYMBOL(snd_ad1848_out);
@@ -124,10 +132,7 @@ EXPORT_SYMBOL(snd_ad1848_out);
static void snd_ad1848_dout(struct snd_ad1848 *chip,
unsigned char reg, unsigned char value)
{
- int timeout;
-
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
outb(value, AD1848P(chip, REG));
mb();
@@ -135,13 +140,11 @@ static void snd_ad1848_dout(struct snd_ad1848 *chip,
static unsigned char snd_ad1848_in(struct snd_ad1848 *chip, unsigned char reg)
{
- int timeout;
-
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
- snd_printk(KERN_WARNING "auto calibration time out - reg = 0x%x\n", reg);
+ snd_printk(KERN_WARNING "auto calibration time out - "
+ "reg = 0x%x\n", reg);
#endif
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
mb();
@@ -183,8 +186,7 @@ static void snd_ad1848_mce_up(struct snd_ad1848 *chip)
unsigned long flags;
int timeout;
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
snd_printk(KERN_WARNING "mce_up - auto calibration time out (0)\n");
@@ -319,11 +321,11 @@ static unsigned char snd_ad1848_get_rate(unsigned int rate)
{
int i;
- for (i = 0; i < 14; i++)
+ for (i = 0; i < ARRAY_SIZE(rates); i++)
if (rate == rates[i])
return freq_bits[i];
snd_BUG();
- return freq_bits[13];
+ return freq_bits[ARRAY_SIZE(rates) - 1];
}
static int snd_ad1848_ioctl(struct snd_pcm_substream *substream,