It appears that alsa allows a sound buffer with size not
evenly devided by the period size. This triggers a warning in
snd-pcsp and floods the log. As a quick fix, the warning should
be disabled.
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The attached patch adds back the compatibility code, allowing the
driver to work with older alsa-libs.
The removal was premature, it breaks the real-life configs.
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

pcsp: remove S16->U8 downsampling as dmix now supports U8 natively.
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

pcsp: locking fix.
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

- make pcsp_start_timer_tasklet static
- remove redundant includes. <asm/i8253.h> is not available on all platforms.
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added PC-speaker sound driver (snd-pcsp).
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>