From 528ba522e18b95d25adc62367f04290776c390e5 Mon Sep 17 00:00:00 2001 From: Knut Petersen Date: Wed, 21 Aug 2013 09:18:54 +0200 Subject: [PATCH] ALSA: rme96: Add PM support v3 Without proper power management handling, the first use of a Digi96/8 anytime after a suspend / resume cycle will start playback with distortions. v3: Abort if vmalloc() of suspend buffers fail, but do not leak memory in that case. [fixed wrong memory leak fix again -- tiwai] Signed-off-by: Knut Petersen Signed-off-by: Takashi Iwai --- sound/pci/rme96.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c index 4e9a556..0506530 100644 --- a/sound/pci/rme96.c +++ b/sound/pci/rme96.c @@ -239,6 +239,13 @@ struct rme96 { u8 rev; /* card revision number */ +#ifdef CONFIG_PM + u32 playback_pointer; + u32 capture_pointer; + void *playback_suspend_buffer; + void *capture_suspend_buffer; +#endif + struct snd_pcm_substream *playback_substream; struct snd_pcm_substream *capture_substream; @@ -370,6 +377,7 @@ static struct snd_pcm_hardware snd_rme96_playback_spdif_info = .info = (SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE), .formats = (SNDRV_PCM_FMTBIT_S16_LE | @@ -400,6 +408,7 @@ static struct snd_pcm_hardware snd_rme96_capture_spdif_info = .info = (SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE), .formats = (SNDRV_PCM_FMTBIT_S16_LE | @@ -430,6 +439,7 @@ static struct snd_pcm_hardware snd_rme96_playback_adat_info = .info = (SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE), .formats = (SNDRV_PCM_FMTBIT_S16_LE | @@ -456,6 +466,7 @@ static struct snd_pcm_hardware snd_rme96_capture_adat_info = .info = (SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE), .formats = (SNDRV_PCM_FMTBIT_S16_LE | @@ -1386,6 +1397,7 @@ snd_rme96_playback_trigger(struct snd_pcm_substream *substream, } break; + case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: if (RME96_ISPLAYING(rme96)) { if (substream != rme96->playback_substream) @@ -1401,6 +1413,7 @@ snd_rme96_playback_trigger(struct snd_pcm_substream *substream, : RME96_STOP_PLAYBACK); break; + case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: if (!RME96_ISPLAYING(rme96)) snd_rme96_trigger(rme96, sync ? RME96_RESUME_BOTH @@ -1441,6 +1454,7 @@ snd_rme96_capture_trigger(struct snd_pcm_substream *substream, } break; + case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: if (RME96_ISRECORDING(rme96)) { if (substream != rme96->capture_substream) @@ -1456,6 +1470,7 @@ snd_rme96_capture_trigger(struct snd_pcm_substream *substream, : RME96_STOP_CAPTURE); break; + case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: if (!RME96_ISRECORDING(rme96)) snd_rme96_trigger(rme96, sync ? RME96_RESUME_BOTH @@ -1556,6 +1571,10 @@ snd_rme96_free(void *private_data) pci_release_regions(rme96->pci); rme96->port = 0; } +#ifdef CONFIG_PM + vfree(rme96->playback_suspend_buffer); + vfree(rme96->capture_suspend_buffer); +#endif pci_disable_device(rme96->pci); } @@ -2354,6 +2373,83 @@ snd_rme96_create_switches(struct snd_card *card, * Card initialisation */ +#ifdef CONFIG_PM + +static int +snd_rme96_suspend(struct pci_dev *pci, + pm_message_t state) +{ + struct snd_card *card = pci_get_drvdata(pci); + struct rme96 *rme96 = card->private_data; + + snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); + snd_pcm_suspend(rme96->playback_substream); + snd_pcm_suspend(rme96->capture_substream); + + /* save capture & playback pointers */ + rme96->playback_pointer = readl(rme96->iobase + RME96_IO_GET_PLAY_POS) + & RME96_RCR_AUDIO_ADDR_MASK; + rme96->capture_pointer = readl(rme96->iobase + RME96_IO_GET_REC_POS) + & RME96_RCR_AUDIO_ADDR_MASK; + + /* save playback and capture buffers */ + memcpy_fromio(rme96->playback_suspend_buffer, + rme96->iobase + RME96_IO_PLAY_BUFFER, RME96_BUFFER_SIZE); + memcpy_fromio(rme96->capture_suspend_buffer, + rme96->iobase + RME96_IO_REC_BUFFER, RME96_BUFFER_SIZE); + + /* disable the DAC */ + rme96->areg &= ~RME96_AR_DAC_EN; + writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG); + + pci_disable_device(pci); + pci_save_state(pci); + + return 0; +} + +static int +snd_rme96_resume(struct pci_dev *pci) +{ + struct snd_card *card = pci_get_drvdata(pci); + struct rme96 *rme96 = card->private_data; + + pci_restore_state(pci); + pci_enable_device(pci); + + /* reset playback and record buffer pointers */ + writel(0, rme96->iobase + RME96_IO_SET_PLAY_POS + + rme96->playback_pointer); + writel(0, rme96->iobase + RME96_IO_SET_REC_POS + + rme96->capture_pointer); + + /* restore playback and capture buffers */ + memcpy_toio(rme96->iobase + RME96_IO_PLAY_BUFFER, + rme96->playback_suspend_buffer, RME96_BUFFER_SIZE); + memcpy_toio(rme96->iobase + RME96_IO_REC_BUFFER, + rme96->capture_suspend_buffer, RME96_BUFFER_SIZE); + + /* reset the ADC */ + writel(rme96->areg | RME96_AR_PD2, + rme96->iobase + RME96_IO_ADDITIONAL_REG); + writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG); + + /* reset and enable DAC, restore analog volume */ + snd_rme96_reset_dac(rme96); + rme96->areg |= RME96_AR_DAC_EN; + writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG); + if (RME96_HAS_ANALOG_OUT(rme96)) { + usleep_range(3000, 10000); + snd_rme96_apply_dac_volume(rme96); + } + + snd_power_change_state(card, SNDRV_CTL_POWER_D0); + + return 0; +} + +#endif + static void snd_rme96_card_free(struct snd_card *card) { snd_rme96_free(card->private_data); @@ -2390,6 +2486,23 @@ snd_rme96_probe(struct pci_dev *pci, return err; } +#ifdef CONFIG_PM + rme96->playback_suspend_buffer = vmalloc(RME96_BUFFER_SIZE); + if (!rme96->playback_suspend_buffer) { + snd_printk(KERN_ERR + "Failed to allocate playback suspend buffer!\n"); + snd_card_free(card); + return -ENOMEM; + } + rme96->capture_suspend_buffer = vmalloc(RME96_BUFFER_SIZE); + if (!rme96->capture_suspend_buffer) { + snd_printk(KERN_ERR + "Failed to allocate capture suspend buffer!\n"); + snd_card_free(card); + return -ENOMEM; + } +#endif + strcpy(card->driver, "Digi96"); switch (rme96->pci->device) { case PCI_DEVICE_ID_RME_DIGI96: @@ -2432,6 +2545,10 @@ static struct pci_driver rme96_driver = { .id_table = snd_rme96_ids, .probe = snd_rme96_probe, .remove = snd_rme96_remove, +#ifdef CONFIG_PM + .suspend = snd_rme96_suspend, + .resume = snd_rme96_resume, +#endif }; module_pci_driver(rme96_driver); -- 2.7.4