diff options
Diffstat (limited to 'sound/pci/lola/lola_pcm.c')
| -rw-r--r-- | sound/pci/lola/lola_pcm.c | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/sound/pci/lola/lola_pcm.c b/sound/pci/lola/lola_pcm.c new file mode 100644 index 000000000..e70276c3e --- /dev/null +++ b/sound/pci/lola/lola_pcm.c @@ -0,0 +1,710 @@ +/* + * Support for Digigram Lola PCI-e boards + * + * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <sound/core.h> +#include <sound/pcm.h> +#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 snd_pcm_lib_malloc_pages(substream, + params_buffer_bytes(hw_params)); +} + +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 snd_pcm_lib_free_pages(substream); +} + +/* + * 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, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = lola_pcm_hw_params, + .hw_free = lola_pcm_hw_free, + .prepare = lola_pcm_prepare, + .trigger = lola_pcm_trigger, + .pointer = lola_pcm_pointer, + .page = snd_pcm_sgbuf_ops_page, +}; + +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, + snd_dma_pci_data(chip->pci), + 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_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, + snd_dma_pci_data(chip->pci), + 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; +} |