[ALSA] cs4231-lib: replace common delay loop by function
Krzysztof Helt [Thu, 6 Sep 2007 13:03:59 +0000 (15:03 +0200)]
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>

sound/isa/cs423x/cs4231_lib.c

index 642bdaa..db9bba1 100644 (file)
@@ -74,7 +74,7 @@ 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,
 };
@@ -134,29 +134,31 @@ static inline u8 cs4231_inb(struct snd_cs4231 *chip, u8 offset)
        return inb(chip->port + offset);
 }
 
-static void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
-                           unsigned char mask, unsigned char value)
+static void snd_cs4231_wait(struct snd_cs4231 *chip)
 {
        int timeout;
-       unsigned char tmp;
 
        for (timeout = 250;
             timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
             timeout--)
                udelay(100);
+}
+
+static void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
+                           unsigned char mask, unsigned char value)
+{
+       unsigned char tmp = (chip->image[reg] & mask) | value;
+
+       snd_cs4231_wait(chip);
 #ifdef CONFIG_SND_DEBUG
        if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
                snd_printk("outm: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
 #endif
-       if (chip->calibrate_mute) {
-               chip->image[reg] &= mask;
-               chip->image[reg] |= value;
-       } else {
+       chip->image[reg] = tmp;
+       if (!chip->calibrate_mute) {
                cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
-               mb();
-               tmp = (chip->image[reg] & mask) | value;
+               wmb();
                cs4231_outb(chip, CS4231P(REG), tmp);
-               chip->image[reg] = tmp;
                mb();
        }
 }
@@ -176,12 +178,7 @@ static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg, unsigned
 
 void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
 {
-       int timeout;
-
-       for (timeout = 250;
-            timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
-            timeout--)
-               udelay(100);
+       snd_cs4231_wait(chip);
 #ifdef CONFIG_SND_DEBUG
        if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
                snd_printk("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
@@ -190,19 +187,13 @@ void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg, unsigned char va
        cs4231_outb(chip, CS4231P(REG), value);
        chip->image[reg] = value;
        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);
 }
 
 unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
 {
-       int timeout;
-
-       for (timeout = 250;
-            timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
-            timeout--)
-               udelay(100);
+       snd_cs4231_wait(chip);
 #ifdef CONFIG_SND_DEBUG
        if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
                snd_printk("in: auto calibration time out - reg = 0x%x\n", reg);
@@ -304,8 +295,7 @@ void snd_cs4231_mce_up(struct snd_cs4231 *chip)
        unsigned long flags;
        int timeout;
 
-       for (timeout = 250; timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT); timeout--)
-               udelay(100);
+       snd_cs4231_wait(chip);
 #ifdef CONFIG_SND_DEBUG
        if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
                snd_printk("mce_up - auto calibration time out (0)\n");
@@ -459,11 +449,11 @@ static unsigned char snd_cs4231_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 unsigned char snd_cs4231_get_format(struct snd_cs4231 *chip,