*/
-#include <sound/driver.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/init.h>
44100
};
+
+/*
+ * we will allocate a single 'emergency' dbdma cmd block to use if the
+ * tx status comes up "DEAD". This happens on some PowerComputing Pmac
+ * clones, either owing to a bug in dbdma or some interaction between
+ * IDE and sound. However, this measure would deal with DEAD status if
+ * it appeared elsewhere.
+ */
+static struct pmac_dbdma emergency_dbdma;
+static int emergency_in_use;
+
+
/*
* allocate DBDMA command arrays
*/
}
+/*
+ * Handle DEAD DMA transfers:
+ * if the TX status comes up "DEAD" - reported on some Power Computing machines
+ * we need to re-start the dbdma - but from a different physical start address
+ * and with a different transfer length. It would get very messy to do this
+ * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
+ * addresses each time. So, we will keep a single dbdma_cmd block which can be
+ * fiddled with.
+ * When DEAD status is first reported the content of the faulted dbdma block is
+ * copied into the emergency buffer and we note that the buffer is in use.
+ * we then bump the start physical address by the amount that was successfully
+ * output before it died.
+ * On any subsequent DEAD result we just do the bump-ups (we know that we are
+ * already using the emergency dbdma_cmd).
+ * CHECK: this just tries to "do it". It is possible that we should abandon
+ * xfers when the number of residual bytes gets below a certain value - I can
+ * see that this might cause a loop-forever if a too small transfer causes
+ * DEAD status. However this is a TODO for now - we'll see what gets reported.
+ * When we get a successful transfer result with the emergency buffer we just
+ * pretend that it completed using the original dmdma_cmd and carry on. The
+ * 'next_cmd' field will already point back to the original loop of blocks.
+ */
+static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
+ volatile struct dbdma_cmd __iomem *cp)
+{
+ unsigned short req, res ;
+ unsigned int phy ;
+
+ /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
+
+ /* to clear DEAD status we must first clear RUN
+ set it to quiescent to be on the safe side */
+ (void)in_le32(&rec->dma->status);
+ out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
+
+ if (!emergency_in_use) { /* new problem */
+ memcpy((void *)emergency_dbdma.cmds, (void *)cp,
+ sizeof(struct dbdma_cmd));
+ emergency_in_use = 1;
+ st_le16(&cp->xfer_status, 0);
+ st_le16(&cp->req_count, rec->period_size);
+ cp = emergency_dbdma.cmds;
+ }
+
+ /* now bump the values to reflect the amount
+ we haven't yet shifted */
+ req = ld_le16(&cp->req_count);
+ res = ld_le16(&cp->res_count);
+ phy = ld_le32(&cp->phy_addr);
+ phy += (req - res);
+ st_le16(&cp->req_count, res);
+ st_le16(&cp->res_count, 0);
+ st_le16(&cp->xfer_status, 0);
+ st_le32(&cp->phy_addr, phy);
+
+ st_le32(&cp->cmd_dep, rec->cmd.addr
+ + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
+
+ st_le16(&cp->command, OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
+
+ /* point at our patched up command block */
+ out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
+
+ /* we must re-start the controller */
+ (void)in_le32(&rec->dma->status);
+ /* should complete clearing the DEAD status */
+ out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
+}
+
/*
* update playback/capture pointer from interrupts
*/
spin_lock(&chip->reg_lock);
if (rec->running) {
- cp = &rec->cmd.cmds[rec->cur_period];
for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
+
+ if (emergency_in_use) /* already using DEAD xfer? */
+ cp = emergency_dbdma.cmds;
+ else
+ cp = &rec->cmd.cmds[rec->cur_period];
+
stat = ld_le16(&cp->xfer_status);
+
+ if (stat & DEAD) {
+ snd_pmac_pcm_dead_xfer(rec, cp);
+ break; /* this block is still going */
+ }
+
+ if (emergency_in_use)
+ emergency_in_use = 0 ; /* done that */
+
if (! (stat & ACTIVE))
break;
+
/*printk("update frag %d\n", rec->cur_period);*/
st_le16(&cp->xfer_status, 0);
st_le16(&cp->req_count, rec->period_size);
rec->cur_period++;
if (rec->cur_period >= rec->nperiods) {
rec->cur_period = 0;
- cp = rec->cmd.cmds;
- } else
- cp++;
+ }
+
spin_unlock(&chip->reg_lock);
snd_pcm_period_elapsed(rec->substream);
spin_lock(&chip->reg_lock);
struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
- int i, j, fflags;
- static int typical_freqs[] = {
- 44100,
- 22050,
- 11025,
- 0,
- };
- static int typical_freq_flags[] = {
- SNDRV_PCM_RATE_44100,
- SNDRV_PCM_RATE_22050,
- SNDRV_PCM_RATE_11025,
- 0,
- };
+ int i;
/* look up frequency table and fill bit mask */
runtime->hw.rates = 0;
- fflags = chip->freqs_ok;
- for (i = 0; typical_freqs[i]; i++) {
- for (j = 0; j < chip->num_freqs; j++) {
- if ((chip->freqs_ok & (1 << j)) &&
- chip->freq_table[j] == typical_freqs[i]) {
- runtime->hw.rates |= typical_freq_flags[i];
- fflags &= ~(1 << j);
- break;
- }
- }
- }
- if (fflags) /* rest */
- runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
+ for (i = 0; i < chip->num_freqs; i++)
+ if (chip->freqs_ok & (1 << i))
+ runtime->hw.rates |=
+ snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
/* check for minimum and maximum rates */
for (i = 0; i < chip->num_freqs; i++) {
runtime->hw.periods_max = rec->cmd.size - 1;
- if (chip->can_duplex)
- snd_pcm_set_sync(subs);
-
/* constraints to fix choppy sound */
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
return 0;
snd_pmac_dbdma_free(chip, &chip->playback.cmd);
snd_pmac_dbdma_free(chip, &chip->capture.cmd);
snd_pmac_dbdma_free(chip, &chip->extra_dma);
+ snd_pmac_dbdma_free(chip, &emergency_dbdma);
if (chip->macio_base)
iounmap(chip->macio_base);
if (chip->latch_base)
return 0;
}
-/*
- * exported - boolean info callbacks for ease of programming
- */
-int snd_pmac_boolean_stereo_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
-{
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
- uinfo->count = 2;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 1;
- return 0;
-}
-
-int snd_pmac_boolean_mono_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
-{
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
- uinfo->count = 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 1;
- return 0;
-}
-
#ifdef PMAC_SUPPORT_AUTOMUTE
/*
* auto-mute
{
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.integer.value[0] != chip->auto_mute) {
- chip->auto_mute = ucontrol->value.integer.value[0];
+ chip->auto_mute = !!ucontrol->value.integer.value[0];
if (chip->update_automute)
chip->update_automute(chip, 1);
return 1;
if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
- snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0) {
+ snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
+ snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
err = -ENOMEM;
goto __error;
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff