// SPDX-License-Identifier: GPL-2.0-or-later /* * Support for Digigram Lola PCI-e boards * * Copyright (c) 2011 Takashi Iwai */ #include #include #include #include #include #include #include #include "lola.h" #define LOLA_MAX_BDL_ENTRIES 8 #define LOLA_MAX_BUF_SIZE (1024*1024*1024) #define LOLA_BDL_ENTRY_SIZE (16 * 16) static struct lola_pcm *lola_get_pcm(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); return &chip->pcm[substream->stream]; } static struct lola_stream *lola_get_stream(struct snd_pcm_substream *substream) { struct lola_pcm *pcm = lola_get_pcm(substream); unsigned int idx = substream->number; return &pcm->streams[idx]; } static unsigned int lola_get_lrc(struct lola *chip) { return lola_readl(chip, BAR1, LRC); } static unsigned int lola_get_tstamp(struct lola *chip, bool quick_no_sync) { unsigned int tstamp = lola_get_lrc(chip) >> 8; if (chip->granularity) { unsigned int wait_banks = quick_no_sync ? 0 : 8; tstamp += (wait_banks + 1) * chip->granularity - 1; tstamp -= tstamp % chip->granularity; } return tstamp << 8; } /* clear any pending interrupt status */ static void lola_stream_clear_pending_irq(struct lola *chip, struct lola_stream *str) { unsigned int val = lola_dsd_read(chip, str->dsd, STS); val &= LOLA_DSD_STS_DESE | LOLA_DSD_STS_BCIS; if (val) lola_dsd_write(chip, str->dsd, STS, val); } static void lola_stream_start(struct lola *chip, struct lola_stream *str, unsigned int tstamp) { lola_stream_clear_pending_irq(chip, str); lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRUN | LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_VLRCV | tstamp); } static void lola_stream_stop(struct lola *chip, struct lola_stream *str, unsigned int tstamp) { lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_VLRCV | tstamp); lola_stream_clear_pending_irq(chip, str); } static void wait_for_srst_clear(struct lola *chip, struct lola_stream *str) { unsigned long end_time = jiffies + msecs_to_jiffies(200); while (time_before(jiffies, end_time)) { unsigned int val; val = lola_dsd_read(chip, str->dsd, CTL); if (!(val & LOLA_DSD_CTL_SRST)) return; msleep(1); } dev_warn(chip->card->dev, "SRST not clear (stream %d)\n", str->dsd); } static int lola_stream_wait_for_fifo(struct lola *chip, struct lola_stream *str, bool ready) { unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0; unsigned long end_time = jiffies + msecs_to_jiffies(200); while (time_before(jiffies, end_time)) { unsigned int reg = lola_dsd_read(chip, str->dsd, STS); if ((reg & LOLA_DSD_STS_FIFORDY) == val) return 0; msleep(1); } dev_warn(chip->card->dev, "FIFO not ready (stream %d)\n", str->dsd); return -EIO; } /* sync for FIFO ready/empty for all linked streams; * clear paused flag when FIFO gets ready again */ static int lola_sync_wait_for_fifo(struct lola *chip, struct snd_pcm_substream *substream, bool ready) { unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0; unsigned long end_time = jiffies + msecs_to_jiffies(200); struct snd_pcm_substream *s; int pending = 0; while (time_before(jiffies, end_time)) { pending = 0; snd_pcm_group_for_each_entry(s, substream) { struct lola_stream *str; if (s->pcm->card != substream->pcm->card) continue; str = lola_get_stream(s); if (str->prepared && str->paused) { unsigned int reg; reg = lola_dsd_read(chip, str->dsd, STS); if ((reg & LOLA_DSD_STS_FIFORDY) != val) { pending = str->dsd + 1; break; } if (ready) str->paused = 0; } } if (!pending) return 0; msleep(1); } dev_warn(chip->card->dev, "FIFO not ready (pending %d)\n", pending - 1); return -EIO; } /* finish pause - prepare for a new resume */ static void lola_sync_pause(struct lola *chip, struct snd_pcm_substream *substream) { struct snd_pcm_substream *s; lola_sync_wait_for_fifo(chip, substream, false); snd_pcm_group_for_each_entry(s, substream) { struct lola_stream *str; if (s->pcm->card != substream->pcm->card) continue; str = lola_get_stream(s); if (str->paused && str->prepared) lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRUN | LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE); } lola_sync_wait_for_fifo(chip, substream, true); } static void lola_stream_reset(struct lola *chip, struct lola_stream *str) { if (str->prepared) { if (str->paused) lola_sync_pause(chip, str->substream); str->prepared = 0; lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE); lola_stream_wait_for_fifo(chip, str, false); lola_stream_clear_pending_irq(chip, str); lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRST); lola_dsd_write(chip, str->dsd, LVI, 0); lola_dsd_write(chip, str->dsd, BDPU, 0); lola_dsd_write(chip, str->dsd, BDPL, 0); wait_for_srst_clear(chip, str); } } static const struct snd_pcm_hardware lola_pcm_hw = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE), .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_FLOAT_LE), .rates = SNDRV_PCM_RATE_8000_192000, .rate_min = 8000, .rate_max = 192000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = LOLA_MAX_BUF_SIZE, .period_bytes_min = 128, .period_bytes_max = LOLA_MAX_BUF_SIZE / 2, .periods_min = 2, .periods_max = LOLA_MAX_BDL_ENTRIES, .fifo_size = 0, }; static int lola_pcm_open(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_pcm *pcm = lola_get_pcm(substream); struct lola_stream *str = lola_get_stream(substream); struct snd_pcm_runtime *runtime = substream->runtime; mutex_lock(&chip->open_mutex); if (str->opened) { mutex_unlock(&chip->open_mutex); return -EBUSY; } str->substream = substream; str->master = NULL; str->opened = 1; runtime->hw = lola_pcm_hw; runtime->hw.channels_max = pcm->num_streams - str->index; if (chip->sample_rate) { /* sample rate is locked */ runtime->hw.rate_min = chip->sample_rate; runtime->hw.rate_max = chip->sample_rate; } else { runtime->hw.rate_min = chip->sample_rate_min; runtime->hw.rate_max = chip->sample_rate_max; } chip->ref_count_rate++; snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); /* period size = multiple of chip->granularity (8, 16 or 32 frames)*/ snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, chip->granularity); snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, chip->granularity); mutex_unlock(&chip->open_mutex); return 0; } static void lola_cleanup_slave_streams(struct lola_pcm *pcm, struct lola_stream *str) { int i; for (i = str->index + 1; i < pcm->num_streams; i++) { struct lola_stream *s = &pcm->streams[i]; if (s->master != str) break; s->master = NULL; s->opened = 0; } } static int lola_pcm_close(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_stream *str = lola_get_stream(substream); mutex_lock(&chip->open_mutex); if (str->substream == substream) { str->substream = NULL; str->opened = 0; } if (--chip->ref_count_rate == 0) { /* release sample rate */ chip->sample_rate = 0; } mutex_unlock(&chip->open_mutex); return 0; } static int lola_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct lola_stream *str = lola_get_stream(substream); str->bufsize = 0; str->period_bytes = 0; str->format_verb = 0; return 0; } static int lola_pcm_hw_free(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_pcm *pcm = lola_get_pcm(substream); struct lola_stream *str = lola_get_stream(substream); mutex_lock(&chip->open_mutex); lola_stream_reset(chip, str); lola_cleanup_slave_streams(pcm, str); mutex_unlock(&chip->open_mutex); return 0; } /* * set up a BDL entry */ static int setup_bdle(struct snd_pcm_substream *substream, struct lola_stream *str, __le32 **bdlp, int ofs, int size) { __le32 *bdl = *bdlp; while (size > 0) { dma_addr_t addr; int chunk; if (str->frags >= LOLA_MAX_BDL_ENTRIES) return -EINVAL; addr = snd_pcm_sgbuf_get_addr(substream, ofs); /* program the address field of the BDL entry */ bdl[0] = cpu_to_le32((u32)addr); bdl[1] = cpu_to_le32(upper_32_bits(addr)); /* program the size field of the BDL entry */ chunk = snd_pcm_sgbuf_get_chunk_size(substream, ofs, size); bdl[2] = cpu_to_le32(chunk); /* program the IOC to enable interrupt * only when the whole fragment is processed */ size -= chunk; bdl[3] = size ? 0 : cpu_to_le32(0x01); bdl += 4; str->frags++; ofs += chunk; } *bdlp = bdl; return ofs; } /* * set up BDL entries */ static int lola_setup_periods(struct lola *chip, struct lola_pcm *pcm, struct snd_pcm_substream *substream, struct lola_stream *str) { __le32 *bdl; int i, ofs, periods, period_bytes; period_bytes = str->period_bytes; periods = str->bufsize / period_bytes; /* program the initial BDL entries */ bdl = (__le32 *)(pcm->bdl.area + LOLA_BDL_ENTRY_SIZE * str->index); ofs = 0; str->frags = 0; for (i = 0; i < periods; i++) { ofs = setup_bdle(substream, str, &bdl, ofs, period_bytes); if (ofs < 0) goto error; } return 0; error: dev_err(chip->card->dev, "Too many BDL entries: buffer=%d, period=%d\n", str->bufsize, period_bytes); return -EINVAL; } static unsigned int lola_get_format_verb(struct snd_pcm_substream *substream) { unsigned int verb; switch (substream->runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: verb = 0x00000000; break; case SNDRV_PCM_FORMAT_S24_LE: verb = 0x00000200; break; case SNDRV_PCM_FORMAT_S32_LE: verb = 0x00000300; break; case SNDRV_PCM_FORMAT_FLOAT_LE: verb = 0x00001300; break; default: return 0; } verb |= substream->runtime->channels; return verb; } static int lola_set_stream_config(struct lola *chip, struct lola_stream *str, int channels) { int i, err; unsigned int verb, val; /* set format info for all channels * (with only one command for the first channel) */ err = lola_codec_read(chip, str->nid, LOLA_VERB_SET_STREAM_FORMAT, str->format_verb, 0, &val, NULL); if (err < 0) { dev_err(chip->card->dev, "Cannot set stream format 0x%x\n", str->format_verb); return err; } /* update stream - channel config */ for (i = 0; i < channels; i++) { verb = (str->index << 6) | i; err = lola_codec_read(chip, str[i].nid, LOLA_VERB_SET_CHANNEL_STREAMID, 0, verb, &val, NULL); if (err < 0) { dev_err(chip->card->dev, "Cannot set stream channel %d\n", i); return err; } } return 0; } /* * set up the SD for streaming */ static int lola_setup_controller(struct lola *chip, struct lola_pcm *pcm, struct lola_stream *str) { dma_addr_t bdl; if (str->prepared) return -EINVAL; /* set up BDL */ bdl = pcm->bdl.addr + LOLA_BDL_ENTRY_SIZE * str->index; lola_dsd_write(chip, str->dsd, BDPL, (u32)bdl); lola_dsd_write(chip, str->dsd, BDPU, upper_32_bits(bdl)); /* program the stream LVI (last valid index) of the BDL */ lola_dsd_write(chip, str->dsd, LVI, str->frags - 1); lola_stream_clear_pending_irq(chip, str); lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_SRUN); str->prepared = 1; return lola_stream_wait_for_fifo(chip, str, true); } static int lola_pcm_prepare(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_pcm *pcm = lola_get_pcm(substream); struct lola_stream *str = lola_get_stream(substream); struct snd_pcm_runtime *runtime = substream->runtime; unsigned int bufsize, period_bytes, format_verb; int i, err; mutex_lock(&chip->open_mutex); lola_stream_reset(chip, str); lola_cleanup_slave_streams(pcm, str); if (str->index + runtime->channels > pcm->num_streams) { mutex_unlock(&chip->open_mutex); return -EINVAL; } for (i = 1; i < runtime->channels; i++) { str[i].master = str; str[i].opened = 1; } mutex_unlock(&chip->open_mutex); bufsize = snd_pcm_lib_buffer_bytes(substream); period_bytes = snd_pcm_lib_period_bytes(substream); format_verb = lola_get_format_verb(substream); str->bufsize = bufsize; str->period_bytes = period_bytes; str->format_verb = format_verb; err = lola_setup_periods(chip, pcm, substream, str); if (err < 0) return err; err = lola_set_sample_rate(chip, runtime->rate); if (err < 0) return err; chip->sample_rate = runtime->rate; /* sample rate gets locked */ err = lola_set_stream_config(chip, str, runtime->channels); if (err < 0) return err; err = lola_setup_controller(chip, pcm, str); if (err < 0) { lola_stream_reset(chip, str); return err; } return 0; } static int lola_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_stream *str; struct snd_pcm_substream *s; unsigned int start; unsigned int tstamp; bool sync_streams; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: case SNDRV_PCM_TRIGGER_RESUME: start = 1; break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: start = 0; break; default: return -EINVAL; } /* * sample correct synchronization is only needed starting several * streams. On stop or if only one stream do as quick as possible */ sync_streams = (start && snd_pcm_stream_linked(substream)); tstamp = lola_get_tstamp(chip, !sync_streams); spin_lock(&chip->reg_lock); snd_pcm_group_for_each_entry(s, substream) { if (s->pcm->card != substream->pcm->card) continue; str = lola_get_stream(s); if (start) lola_stream_start(chip, str, tstamp); else lola_stream_stop(chip, str, tstamp); str->running = start; str->paused = !start; snd_pcm_trigger_done(s, substream); } spin_unlock(&chip->reg_lock); return 0; } static snd_pcm_uframes_t lola_pcm_pointer(struct snd_pcm_substream *substream) { struct lola *chip = snd_pcm_substream_chip(substream); struct lola_stream *str = lola_get_stream(substream); unsigned int pos = lola_dsd_read(chip, str->dsd, LPIB); if (pos >= str->bufsize) pos = 0; return bytes_to_frames(substream->runtime, pos); } void lola_pcm_update(struct lola *chip, struct lola_pcm *pcm, unsigned int bits) { int i; for (i = 0; bits && i < pcm->num_streams; i++) { if (bits & (1 << i)) { struct lola_stream *str = &pcm->streams[i]; if (str->substream && str->running) snd_pcm_period_elapsed(str->substream); bits &= ~(1 << i); } } } static const struct snd_pcm_ops lola_pcm_ops = { .open = lola_pcm_open, .close = lola_pcm_close, .hw_params = lola_pcm_hw_params, .hw_free = lola_pcm_hw_free, .prepare = lola_pcm_prepare, .trigger = lola_pcm_trigger, .pointer = lola_pcm_pointer, }; int lola_create_pcm(struct lola *chip) { struct snd_pcm *pcm; int i, err; for (i = 0; i < 2; i++) { err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev, PAGE_SIZE, &chip->pcm[i].bdl); if (err < 0) return err; } err = snd_pcm_new(chip->card, "Digigram Lola", 0, chip->pcm[SNDRV_PCM_STREAM_PLAYBACK].num_streams, chip->pcm[SNDRV_PCM_STREAM_CAPTURE].num_streams, &pcm); if (err < 0) return err; strlcpy(pcm->name, "Digigram Lola", sizeof(pcm->name)); pcm->private_data = chip; for (i = 0; i < 2; i++) { if (chip->pcm[i].num_streams) snd_pcm_set_ops(pcm, i, &lola_pcm_ops); } /* buffer pre-allocation */ snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, &chip->pci->dev, 1024 * 64, 32 * 1024 * 1024); return 0; } void lola_free_pcm(struct lola *chip) { snd_dma_free_pages(&chip->pcm[0].bdl); snd_dma_free_pages(&chip->pcm[1].bdl); } /* */ static int lola_init_stream(struct lola *chip, struct lola_stream *str, int idx, int nid, int dir) { unsigned int val; int err; str->nid = nid; str->index = idx; str->dsd = idx; if (dir == PLAY) str->dsd += MAX_STREAM_IN_COUNT; err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val); if (err < 0) { dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid); return err; } if (dir == PLAY) { /* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1) */ if ((val & 0x00f00dff) != 0x00000010) { dev_err(chip->card->dev, "Invalid wcaps 0x%x for 0x%x\n", val, nid); return -EINVAL; } } else { /* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1) * (bug : ignore bit8: Conn list = 0/1) */ if ((val & 0x00f00cff) != 0x00100010) { dev_err(chip->card->dev, "Invalid wcaps 0x%x for 0x%x\n", val, nid); return -EINVAL; } /* test bit9:DIGITAL and bit12:SRC_PRESENT*/ if ((val & 0x00001200) == 0x00001200) chip->input_src_caps_mask |= (1 << idx); } err = lola_read_param(chip, nid, LOLA_PAR_STREAM_FORMATS, &val); if (err < 0) { dev_err(chip->card->dev, "Can't read FORMATS 0x%x\n", nid); return err; } val &= 3; if (val == 3) str->can_float = true; if (!(val & 1)) { dev_err(chip->card->dev, "Invalid formats 0x%x for 0x%x", val, nid); return -EINVAL; } return 0; } int lola_init_pcm(struct lola *chip, int dir, int *nidp) { struct lola_pcm *pcm = &chip->pcm[dir]; int i, nid, err; nid = *nidp; for (i = 0; i < pcm->num_streams; i++, nid++) { err = lola_init_stream(chip, &pcm->streams[i], i, nid, dir); if (err < 0) return err; } *nidp = nid; return 0; }