// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for Digigram Lola PCI-e boards
*
* Copyright (c) 2011 Takashi Iwai <[email protected]>
*/
#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 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;
u8 num_streams = min_t(u8, pcm->num_streams, ARRAY_SIZE(pcm->streams));
for (i = 0; bits && i < 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++) {
chip->pcm[i].bdl =
snd_devm_alloc_pages(&chip->pci->dev, SNDRV_DMA_TYPE_DEV,
PAGE_SIZE);
if (!chip->pcm[i].bdl)
return -ENOMEM;
}
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;
strscpy(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;
}
/*
*/
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;
}
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