diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/isa/gus/gus_pcm.c | 97 |
1 files changed, 59 insertions, 38 deletions
diff --git a/sound/isa/gus/gus_pcm.c b/sound/isa/gus/gus_pcm.c index 0cc3f272edf1..b9f6dcbef889 100644 --- a/sound/isa/gus/gus_pcm.c +++ b/sound/isa/gus/gus_pcm.c @@ -353,26 +353,25 @@ static int snd_gf1_pcm_poke_block(struct snd_gus_card *gus, unsigned char *buf, return 0; } -static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream, - int voice, - snd_pcm_uframes_t pos, - void __user *src, - snd_pcm_uframes_t count) +static int get_bpos(struct gus_pcm_private *pcmp, int voice, unsigned int pos, + unsigned int len) { - struct snd_pcm_runtime *runtime = substream->runtime; - struct gus_pcm_private *pcmp = runtime->private_data; - struct snd_gus_card *gus = pcmp->gus; - unsigned int bpos, len; - int w16, invert; - - bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2)); - len = samples_to_bytes(runtime, count); + unsigned int bpos = pos + (voice * (pcmp->dma_size / 2)); if (snd_BUG_ON(bpos > pcmp->dma_size)) return -EIO; if (snd_BUG_ON(bpos + len > pcmp->dma_size)) return -EIO; - if (copy_from_user(runtime->dma_area + bpos, src, len)) - return -EFAULT; + return bpos; +} + +static int playback_copy_ack(struct snd_pcm_substream *substream, + unsigned int bpos, unsigned int len) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct gus_pcm_private *pcmp = runtime->private_data; + struct snd_gus_card *gus = pcmp->gus; + int w16, invert; + if (len > 32) return snd_gf1_pcm_block_change(substream, bpos, pcmp->memory + bpos, len); @@ -383,33 +382,54 @@ static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream, pcmp->memory + bpos, len, w16, invert); } +static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream, + int voice, unsigned long pos, + void __user *src, unsigned long count) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct gus_pcm_private *pcmp = runtime->private_data; + unsigned int len = count; + int bpos; + + bpos = get_bpos(pcmp, voice, pos, len); + if (bpos < 0) + return pos; + if (copy_from_user(runtime->dma_area + bpos, src, len)) + return -EFAULT; + return playback_copy_ack(substream, bpos, len); +} + +static int snd_gf1_pcm_playback_copy_kernel(struct snd_pcm_substream *substream, + int voice, unsigned long pos, + void *src, unsigned long count) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct gus_pcm_private *pcmp = runtime->private_data; + unsigned int len = count; + int bpos; + + bpos = get_bpos(pcmp, voice, pos, len); + if (bpos < 0) + return pos; + memcpy(runtime->dma_area + bpos, src, len); + return playback_copy_ack(substream, bpos, len); +} + static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream, - int voice, - snd_pcm_uframes_t pos, - snd_pcm_uframes_t count) + int voice, unsigned long pos, + unsigned long count) { struct snd_pcm_runtime *runtime = substream->runtime; struct gus_pcm_private *pcmp = runtime->private_data; - struct snd_gus_card *gus = pcmp->gus; - unsigned int bpos, len; - int w16, invert; + unsigned int len = count; + int bpos; - bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2)); - len = samples_to_bytes(runtime, count); - if (snd_BUG_ON(bpos > pcmp->dma_size)) - return -EIO; - if (snd_BUG_ON(bpos + len > pcmp->dma_size)) - return -EIO; + bpos = get_bpos(pcmp, voice, pos, len); + if (bpos < 0) + return pos; snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos, - count); - if (len > 32) - return snd_gf1_pcm_block_change(substream, bpos, - pcmp->memory + bpos, len); - - w16 = (snd_pcm_format_width(runtime->format) == 16); - invert = snd_pcm_format_unsigned(runtime->format); - return snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos, - pcmp->memory + bpos, len, w16, invert); + bytes_to_samples(runtime, count)); + return playback_copy_ack(substream, bpos, len); } static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream, @@ -831,8 +851,9 @@ static struct snd_pcm_ops snd_gf1_pcm_playback_ops = { .prepare = snd_gf1_pcm_playback_prepare, .trigger = snd_gf1_pcm_playback_trigger, .pointer = snd_gf1_pcm_playback_pointer, - .copy = snd_gf1_pcm_playback_copy, - .silence = snd_gf1_pcm_playback_silence, + .copy_user = snd_gf1_pcm_playback_copy, + .copy_kernel = snd_gf1_pcm_playback_copy_kernel, + .fill_silence = snd_gf1_pcm_playback_silence, }; static struct snd_pcm_ops snd_gf1_pcm_capture_ops = { |
