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ALSA: hdsp - poll for iobox

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sleeping for 2 seconds before checking for the iobox is not enough
on some systems.
this patch increases the timeout, but polls the card during that
time. it thus speeds up the module loading when the card has already
been initialized, while being more robust on systems, which require
a higher timeout than the predefined 2 seconds.

Signed-off-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Tim Blechmann 2009-02-20 19:30:35 +01:00 committed by Takashi Iwai
parent 66a101dda6
commit e588ed8304
1 changed files with 25 additions and 4 deletions
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29
sound/pci/rme9652/hdsp.c
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@ -653,7 +653,6 @@ static unsigned int hdsp_read(struct hdsp *hdsp, int reg)
static int hdsp_check_for_iobox (struct hdsp *hdsp)
{
if (hdsp->io_type == H9652 || hdsp->io_type == H9632) return 0;
if (hdsp_read (hdsp, HDSP_statusRegister) & HDSP_ConfigError) {
snd_printk ("Hammerfall-DSP: no Digiface or Multiface connected!\n");
@ -661,7 +660,29 @@ static int hdsp_check_for_iobox (struct hdsp *hdsp)
return -EIO;
}
return 0;
}
static int hdsp_wait_for_iobox(struct hdsp *hdsp, unsigned int loops,
unsigned int delay)
{
unsigned int i;
if (hdsp->io_type == H9652 || hdsp->io_type == H9632)
return 0;
for (i = 0; i != loops; ++i) {
if (hdsp_read(hdsp, HDSP_statusRegister) & HDSP_ConfigError)
msleep(delay);
else {
snd_printd("Hammerfall-DSP: iobox found after %ums!\n",
i * delay);
return 0;
}
}
snd_printk("Hammerfall-DSP: no Digiface or Multiface connected!\n");
hdsp->state &= ~HDSP_FirmwareLoaded;
return -EIO;
}
static int snd_hdsp_load_firmware_from_cache(struct hdsp *hdsp) {
@ -5046,10 +5067,10 @@ static int __devinit snd_hdsp_create(struct snd_card *card,
return err;
if (!is_9652 && !is_9632) {
/* we wait 2 seconds to let freshly inserted cardbus cards do their hardware init */
ssleep(2);
/* we wait a maximum of 10 seconds to let freshly
* inserted cardbus cards do their hardware init */
err = hdsp_wait_for_iobox(hdsp, 1000, 10);
err = hdsp_check_for_iobox(hdsp);
if (err < 0)
return err;