#define CM_MMODE_MASK 0x00000E00 /* model DAA interface mode */
#define CM_SPDIF_SELECT2 0x00000100 /* for model > 039 ? */
#define CM_ENCENTER 0x00000080
-#define CM_FLINKON 0x00000080 /* force modem link detection on, model 037 */
+#define CM_FLINKON 0x00000040 /* force modem link detection on, model 037 */
#define CM_MUTECH1 0x00000040 /* mute PCI ch1 to DAC */
-#define CM_FLINKOFF 0x00000040 /* force modem link detection off, model 037 */
-#define CM_UNKNOWN_18_5 0x00000020 /* ? */
+#define CM_FLINKOFF 0x00000020 /* force modem link detection off, model 037 */
#define CM_MIDSMP 0x00000010 /* 1/2 interpolation at front end DAC */
#define CM_UPDDMA_MASK 0x0000000C /* TDMA position update notification */
#define CM_UPDDMA_2048 0x00000000
struct cmipci_pcm {
struct snd_pcm_substream *substream;
- int running; /* dac/adc running? */
+ u8 running; /* dac/adc running? */
+ u8 fmt; /* format bits */
+ u8 is_dac;
+ u8 needs_silencing;
unsigned int dma_size; /* in frames */
- unsigned int period_size; /* in frames */
+ unsigned int shift;
+ unsigned int ch; /* channel (0/1) */
unsigned int offset; /* physical address of the buffer */
- unsigned int fmt; /* format bits */
- int ch; /* channel (0/1) */
- unsigned int is_dac; /* is dac? */
- int bytes_per_frame;
- int shift;
};
/* mixer elements toggled/resumed during ac3 playback */
static unsigned int snd_cmipci_rate_freq(unsigned int rate)
{
unsigned int i;
+
+ if (rate > 48000)
+ rate /= 2;
for (i = 0; i < ARRAY_SIZE(rates); i++) {
if (rates[i] == rate)
return i;
/*
*/
-static unsigned int hw_channels[] = {1, 2, 4, 5, 6, 8};
+static unsigned int hw_channels[] = {1, 2, 4, 6, 8};
static struct snd_pcm_hw_constraint_list hw_constraints_channels_4 = {
.count = 3,
.list = hw_channels,
.mask = 0,
};
static struct snd_pcm_hw_constraint_list hw_constraints_channels_6 = {
- .count = 5,
+ .count = 4,
.list = hw_channels,
.mask = 0,
};
static struct snd_pcm_hw_constraint_list hw_constraints_channels_8 = {
- .count = 6,
+ .count = 5,
.list = hw_channels,
.mask = 0,
};
static int set_dac_channels(struct cmipci *cm, struct cmipci_pcm *rec, int channels)
{
if (channels > 2) {
- if (! cm->can_multi_ch)
+ if (!cm->can_multi_ch || !rec->ch)
return -EINVAL;
if (rec->fmt != 0x03) /* stereo 16bit only */
return -EINVAL;
+ }
+ if (cm->can_multi_ch) {
spin_lock_irq(&cm->reg_lock);
- snd_cmipci_set_bit(cm, CM_REG_LEGACY_CTRL, CM_NXCHG);
- snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_XCHGDAC);
- if (channels > 4) {
- snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_CHB3D);
- snd_cmipci_set_bit(cm, CM_REG_CHFORMAT, CM_CHB3D5C);
+ if (channels > 2) {
+ snd_cmipci_set_bit(cm, CM_REG_LEGACY_CTRL, CM_NXCHG);
+ snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_XCHGDAC);
} else {
- snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_CHB3D5C);
- snd_cmipci_set_bit(cm, CM_REG_CHFORMAT, CM_CHB3D);
+ snd_cmipci_clear_bit(cm, CM_REG_LEGACY_CTRL, CM_NXCHG);
+ snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_XCHGDAC);
}
- if (channels >= 6) {
+ if (channels == 8)
+ snd_cmipci_set_bit(cm, CM_REG_EXT_MISC, CM_CHB3D8C);
+ else
+ snd_cmipci_clear_bit(cm, CM_REG_EXT_MISC, CM_CHB3D8C);
+ if (channels == 6) {
+ snd_cmipci_set_bit(cm, CM_REG_CHFORMAT, CM_CHB3D5C);
snd_cmipci_set_bit(cm, CM_REG_LEGACY_CTRL, CM_CHB3D6C);
- snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_ENCENTER);
} else {
- snd_cmipci_clear_bit(cm, CM_REG_LEGACY_CTRL, CM_CHB3D6C);
- snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_ENCENTER);
- }
- if (cm->chip_version == 68) {
- if (channels == 8) {
- snd_cmipci_set_bit(cm, CM_REG_EXT_MISC, CM_CHB3D8C);
- } else {
- snd_cmipci_clear_bit(cm, CM_REG_EXT_MISC, CM_CHB3D8C);
- }
- }
- spin_unlock_irq(&cm->reg_lock);
-
- } else {
- if (cm->can_multi_ch) {
- spin_lock_irq(&cm->reg_lock);
- snd_cmipci_clear_bit(cm, CM_REG_LEGACY_CTRL, CM_NXCHG);
- snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_CHB3D);
snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_CHB3D5C);
snd_cmipci_clear_bit(cm, CM_REG_LEGACY_CTRL, CM_CHB3D6C);
- snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_ENCENTER);
- snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_XCHGDAC);
- spin_unlock_irq(&cm->reg_lock);
}
+ if (channels == 4)
+ snd_cmipci_set_bit(cm, CM_REG_CHFORMAT, CM_CHB3D);
+ else
+ snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_CHB3D);
+ spin_unlock_irq(&cm->reg_lock);
}
return 0;
}
struct snd_pcm_substream *substream)
{
unsigned int reg, freq, val;
+ unsigned int period_size;
struct snd_pcm_runtime *runtime = substream->runtime;
rec->fmt = 0;
rec->offset = runtime->dma_addr;
/* buffer and period sizes in frame */
rec->dma_size = runtime->buffer_size << rec->shift;
- rec->period_size = runtime->period_size << rec->shift;
+ period_size = runtime->period_size << rec->shift;
if (runtime->channels > 2) {
/* multi-channels */
rec->dma_size = (rec->dma_size * runtime->channels) / 2;
- rec->period_size = (rec->period_size * runtime->channels) / 2;
+ period_size = (period_size * runtime->channels) / 2;
}
spin_lock_irq(&cm->reg_lock);
/* program sample counts */
reg = rec->ch ? CM_REG_CH1_FRAME2 : CM_REG_CH0_FRAME2;
snd_cmipci_write_w(cm, reg, rec->dma_size - 1);
- snd_cmipci_write_w(cm, reg + 2, rec->period_size - 1);
+ snd_cmipci_write_w(cm, reg + 2, period_size - 1);
/* set adc/dac flag */
val = rec->ch ? CM_CHADC1 : CM_CHADC0;
* PCM trigger/stop
*/
static int snd_cmipci_pcm_trigger(struct cmipci *cm, struct cmipci_pcm *rec,
- struct snd_pcm_substream *substream, int cmd)
+ int cmd)
{
unsigned int inthld, chen, reset, pause;
int result = 0;
cm->ctrl &= ~chen;
snd_cmipci_write(cm, CM_REG_FUNCTRL0, cm->ctrl | reset);
snd_cmipci_write(cm, CM_REG_FUNCTRL0, cm->ctrl & ~reset);
+ rec->needs_silencing = rec->is_dac;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
int cmd)
{
struct cmipci *cm = snd_pcm_substream_chip(substream);
- return snd_cmipci_pcm_trigger(cm, &cm->channel[CM_CH_PLAY], substream, cmd);
+ return snd_cmipci_pcm_trigger(cm, &cm->channel[CM_CH_PLAY], cmd);
}
static snd_pcm_uframes_t snd_cmipci_playback_pointer(struct snd_pcm_substream *substream)
int cmd)
{
struct cmipci *cm = snd_pcm_substream_chip(substream);
- return snd_cmipci_pcm_trigger(cm, &cm->channel[CM_CH_CAPT], substream, cmd);
+ return snd_cmipci_pcm_trigger(cm, &cm->channel[CM_CH_CAPT], cmd);
}
static snd_pcm_uframes_t snd_cmipci_capture_pointer(struct snd_pcm_substream *substream)
return snd_cmipci_pcm_prepare(cm, &cm->channel[CM_CH_PLAY], substream);
}
+/*
+ * Apparently, the samples last played on channel A stay in some buffer, even
+ * after the channel is reset, and get added to the data for the rear DACs when
+ * playing a multichannel stream on channel B. This is likely to generate
+ * wraparounds and thus distortions.
+ * To avoid this, we play at least one zero sample after the actual stream has
+ * stopped.
+ */
+static void snd_cmipci_silence_hack(struct cmipci *cm, struct cmipci_pcm *rec)
+{
+ struct snd_pcm_runtime *runtime = rec->substream->runtime;
+ unsigned int reg, val;
+
+ if (rec->needs_silencing && runtime && runtime->dma_area) {
+ /* set up a small silence buffer */
+ memset(runtime->dma_area, 0, PAGE_SIZE);
+ reg = rec->ch ? CM_REG_CH1_FRAME2 : CM_REG_CH0_FRAME2;
+ val = ((PAGE_SIZE / 4) - 1) | (((PAGE_SIZE / 4) / 2 - 1) << 16);
+ snd_cmipci_write(cm, reg, val);
+
+ /* configure for 16 bits, 2 channels, 8 kHz */
+ if (runtime->channels > 2)
+ set_dac_channels(cm, rec, 2);
+ spin_lock_irq(&cm->reg_lock);
+ val = snd_cmipci_read(cm, CM_REG_FUNCTRL1);
+ val &= ~(CM_ASFC_MASK << (rec->ch * 3));
+ val |= (4 << CM_ASFC_SHIFT) << (rec->ch * 3);
+ snd_cmipci_write(cm, CM_REG_FUNCTRL1, val);
+ val = snd_cmipci_read(cm, CM_REG_CHFORMAT);
+ val &= ~(CM_CH0FMT_MASK << (rec->ch * 2));
+ val |= (3 << CM_CH0FMT_SHIFT) << (rec->ch * 2);
+ if (cm->chip_version == 68) {
+ val &= ~(CM_CH0_SRATE_88K << (rec->ch * 2));
+ val &= ~(CM_CH0_SRATE_96K << (rec->ch * 2));
+ }
+ snd_cmipci_write(cm, CM_REG_CHFORMAT, val);
+
+ /* start stream (we don't need interrupts) */
+ cm->ctrl |= CM_CHEN0 << rec->ch;
+ snd_cmipci_write(cm, CM_REG_FUNCTRL0, cm->ctrl);
+ spin_unlock_irq(&cm->reg_lock);
+
+ msleep(1);
+
+ /* stop and reset stream */
+ spin_lock_irq(&cm->reg_lock);
+ cm->ctrl &= ~(CM_CHEN0 << rec->ch);
+ val = CM_RST_CH0 << rec->ch;
+ snd_cmipci_write(cm, CM_REG_FUNCTRL0, cm->ctrl | val);
+ snd_cmipci_write(cm, CM_REG_FUNCTRL0, cm->ctrl & ~val);
+ spin_unlock_irq(&cm->reg_lock);
+
+ rec->needs_silencing = 0;
+ }
+}
+
static int snd_cmipci_playback_hw_free(struct snd_pcm_substream *substream)
{
struct cmipci *cm = snd_pcm_substream_chip(substream);
setup_spdif_playback(cm, substream, 0, 0);
restore_mixer_state(cm);
+ snd_cmipci_silence_hack(cm, &cm->channel[0]);
+ return snd_cmipci_hw_free(substream);
+}
+
+static int snd_cmipci_playback2_hw_free(struct snd_pcm_substream *substream)
+{
+ struct cmipci *cm = snd_pcm_substream_chip(substream);
+ snd_cmipci_silence_hack(cm, &cm->channel[1]);
return snd_cmipci_hw_free(substream);
}
.close = snd_cmipci_playback2_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_cmipci_playback2_hw_params,
- .hw_free = snd_cmipci_hw_free,
+ .hw_free = snd_cmipci_playback2_hw_free,
.prepare = snd_cmipci_capture_prepare, /* channel B */
.trigger = snd_cmipci_capture_trigger, /* channel B */
.pointer = snd_cmipci_capture_pointer, /* channel B */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff