diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-31 23:16:28 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-31 23:16:28 (GMT) |
commit | e1a9c9872dd004617555dff079b357a6ffd945e9 (patch) | |
tree | c34779e59712ff345f8e4ee97e74086a85b34974 /sound/ppc/pmac.c | |
parent | fcc3ff4f9d695a80dc6e6058e0d631a3026ed4c3 (diff) | |
parent | 2ecba4ffbbc6c85fce8c3878514be415edace413 (diff) | |
download | linux-fsl-qoriq-e1a9c9872dd004617555dff079b357a6ffd945e9.tar.xz |
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa: (299 commits)
[ALSA] version 1.0.16rc2
[ALSA] hda: fix Mic in as output
[ALSA] emu10k1 - Another EMU0404 Board ID
[ALSA] emu10k1 - Fix kthread handling at resume
[ALSA] emu10k1: General cleanup, add new locks, fix alsa bug#3501, kernel bug#9304.
[ALSA] emu10k1 - Use enum for emu_model types
[ALSA] emu10k1 - Don't create emu1010 controls for non-emu boards
[ALSA] emu10k1 - 1616(M) cardbus improvements
[ALSA] snd:emu10k1: E-Mu updates. Fixes to firmware loading and support for 0404.
[ALSA] emu10k1: Add comments regarding E-Mu ins and outs.
[ALSA] oxygen: revert SPI clock frequency change for AK4396/WM8785
[ALSA] es1938 - improve capture hw pointer reads
[ALSA] HDA-Intel - Add support for Intel SCH
[ALSA] hda: Add GPIO mute support to STAC9205
[ALSA] hda-codec - Add Dell T3400 support
[ALSA] hda-codec - Add model for HP DV9553EG laptop
[ALSA] hda-codec - Control SPDIF as slave
[ALSA] hda_intel: ALSA HD Audio patch for Intel ICH10 DeviceID's
[ALSA] Fix Oops with PCM OSS sync
[ALSA] hda-codec - Add speaker automute to ALC262 HP models
...
Diffstat (limited to 'sound/ppc/pmac.c')
-rw-r--r-- | sound/ppc/pmac.c | 110 |
1 files changed, 103 insertions, 7 deletions
diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c index 4f9b19c..613a565 100644 --- a/sound/ppc/pmac.c +++ b/sound/ppc/pmac.c @@ -20,7 +20,6 @@ */ -#include <sound/driver.h> #include <asm/io.h> #include <asm/irq.h> #include <linux/init.h> @@ -45,6 +44,18 @@ static int tumbler_freqs[1] = { 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 */ @@ -376,6 +387,75 @@ static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs /* + * 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 */ static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec) @@ -386,11 +466,26 @@ static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec) 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); @@ -398,9 +493,8 @@ static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec) 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); @@ -770,6 +864,7 @@ static int snd_pmac_free(struct snd_pmac *chip) 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) @@ -1028,7 +1123,7 @@ static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol, { 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; @@ -1108,7 +1203,8 @@ int __init snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return) 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; } |