At Wed, 19 Sep 2007 23:37:42 +0200, Krzysztof Helt wrote:
From: Krzysztof Helt krzysztof.h1@wp.pl
This simplifies and fixes waiting loops of the mce_down() function after Trent Piepho's patch for AD1848. It also makes busy_wait() function call not atomic.
Signed-off-by: Krzysztof Helt krzysztof.h1@wp.pl
I can't apply it cleanly on HG tree. Which patch is missing?
thanks,
Takashi
diff -urp linux-ref/sound/sparc/cs4231.c linux-2.6.23/sound/sparc/cs4231.c --- linux-ref/sound/sparc/cs4231.c 2007-09-19 23:31:30.603838619 +0200 +++ linux-2.6.23/sound/sparc/cs4231.c 2007-09-19 23:23:24.552140109 +0200 @@ -392,62 +392,45 @@ static void snd_cs4231_mce_up(struct snd
static void snd_cs4231_mce_down(struct snd_cs4231 *chip) {
- unsigned long flags;
- int timeout;
- unsigned long flags, timeout;
- int reg;
- spin_lock_irqsave(&chip->lock, flags); snd_cs4231_busy_wait(chip);
- spin_lock_irqsave(&chip->lock, flags);
#ifdef CONFIG_SND_DEBUG if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT) snd_printdd("mce_down [%p] - auto calibration time out (0)\n", CS4231U(chip, REGSEL)); #endif chip->mce_bit &= ~CS4231_MCE;
- timeout = __cs4231_readb(chip, CS4231U(chip, REGSEL));
- __cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f),
- reg = __cs4231_readb(chip, CS4231U(chip, REGSEL));
- __cs4231_writeb(chip, chip->mce_bit | (reg & 0x1f), CS4231U(chip, REGSEL));
- if (timeout == 0x80)
snd_printdd("mce_down [%p]: serious init problem - codec still busy\n", chip->port);- if ((timeout & CS4231_MCE) == 0) {
- if (reg == 0x80)
snd_printdd("mce_down [%p]: serious init problem ""- codec still busy\n", chip->port);- if ((reg & CS4231_MCE) == 0) { spin_unlock_irqrestore(&chip->lock, flags); return; }
snd_cs4231_busy_wait(chip);
/* calibration process */
- /*
* Wait for auto-calibration (AC) process to finish, i.e. ACI to go low.*/
- snd_cs4231_ready(chip);
- snd_cs4231_ready(chip);
- if ((snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0) {
snd_printd("cs4231_mce_down - auto calibration time out (1)\n");
- timeout = jiffies + msecs_to_jiffies(250);
- do { spin_unlock_irqrestore(&chip->lock, flags);
return;- }
- /* in 10ms increments, check condition, up to 250ms */
- timeout = 25;
- while (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) {
spin_unlock_irqrestore(&chip->lock, flags);if (--timeout < 0) {snd_printk("mce_down - auto calibration time out (2)\n");return;}msleep(10);spin_lock_irqsave(&chip->lock, flags);- }
- /* in 10ms increments, check condition, up to 100ms */
- timeout = 10;
- while (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT) {
spin_unlock_irqrestore(&chip->lock, flags);if (--timeout < 0) {snd_printk("mce_down - auto calibration time out (3)\n");return;}msleep(10);
msleep(1);
- }
reg = snd_cs4231_in(chip, CS4231_TEST_INIT);reg &= CS4231_CALIB_IN_PROGRESS;- } while (reg && time_before(jiffies, timeout)); spin_unlock_irqrestore(&chip->lock, flags);
- if (reg)
snd_printk(KERN_ERR"mce_down - auto calibration time out (2)\n");}
static void snd_cs4231_advance_dma(struct cs4231_dma_control *dma_cont,
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