From: Krzysztof Helt krzysztof.h1@wp.pl
This patch replaces a common delay loop by a function. It also uses ARRAY_SIZE macro for the rates table.
Signed-off-by: Krzysztof Helt krzysztof.h1@wp.pl ---
It has the waiting function renamed to snd_ad1848_wait().
diff -urp linux-2.6.23.orig/sound/isa/ad1848/ad1848_lib.c linux-2.6.23/sound/isa/ad1848/ad1848_lib.c --- linux-2.6.23.orig/sound/isa/ad1848/ad1848_lib.c 2007-09-02 12:49:15.281291412 +0200 +++ linux-2.6.23/sound/isa/ad1848/ad1848_lib.c 2007-09-05 18:49:58.510592223 +0200 @@ -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 * 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_a
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 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 { 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,