ALSA: Add the driver for Digigram Lola PCI-e boards
Added a new driver for supporting Digigram Lola PCI-e boards.
Lola has a similar h/w design like HD-audio but with extended verbs.
Thus the driver is written similarly like HD-audio driver in the bus
part. The codec part is rather written in a fixed way specific to the
Lola board because of the verb incompatibility.
The driver provides basic PCM, supporting multi-streams and mixing.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/lola/lola_pcm.c b/sound/pci/lola/lola_pcm.c
new file mode 100644
index 0000000..bf17f92
--- /dev/null
+++ b/sound/pci/lola/lola_pcm.c
@@ -0,0 +1,607 @@
+/*
+ * 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 <sound/core.h>
+#include <sound/pcm.h>
+#include "lola.h"
+
+#define BDL_SIZE 4096
+#define LOLA_MAX_BDL_ENTRIES (BDL_SIZE / 16)
+#define LOLA_MAX_FRAG 32
+#define LOLA_MAX_BUF_SIZE (1024*1024*1024)
+
+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 lola_stream_clear(struct lola *chip, struct lola_stream *str)
+{
+ lola_dsd_write(chip, str->dsd, CTL, 0);
+ 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(50);
+ 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);
+ }
+ printk(KERN_WARNING SFX "SRST not clear (stream %d)\n", str->dsd);
+}
+
+static void lola_stream_reset(struct lola *chip, struct lola_stream *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 int lola_stream_wait_for_fifo_ready(struct lola *chip,
+ struct lola_stream *str)
+{
+ unsigned long end_time = jiffies + msecs_to_jiffies(50);
+ while (time_before(jiffies, end_time)) {
+ unsigned int val = lola_dsd_read(chip, str->dsd, STS);
+ if (val & LOLA_DSD_STS_FIFORDY)
+ return 0;
+ msleep(1);
+ }
+ printk(KERN_WARNING SFX "FIFO not ready (stream %d)\n", str->dsd);
+ return -EIO;
+}
+
+static 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_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .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_FRAG,
+ .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;
+ int err;
+
+ mutex_lock(&chip->open_mutex);
+ if (str->opened) {
+ mutex_unlock(&chip->open_mutex);
+ return -EBUSY;
+ }
+ err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(chip->pci),
+ PAGE_SIZE, &str->bdl);
+ if (err < 0) {
+ mutex_unlock(&chip->open_mutex);
+ printk(KERN_ERR SFX "Can't allocate BDL\n");
+ return err;
+ }
+ str->substream = substream;
+ str->master = NULL;
+ str->opened = 1;
+ runtime->hw = lola_pcm_hw;
+ runtime->hw.channels_max = pcm->num_streams - str->index;
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+ 128);
+ snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+ 128);
+ 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;
+ }
+ snd_dma_free_pages(&str->bdl);
+ 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, u32 **bdlp,
+ int ofs, int size)
+{
+ u32 *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 snd_pcm_substream *substream,
+ struct lola_stream *str)
+{
+ u32 *bdl;
+ int i, ofs, periods, period_bytes;
+
+ period_bytes = str->period_bytes;
+ periods = str->bufsize / period_bytes;
+
+ /* program the initial BDL entries */
+ bdl = (u32 *)str->bdl.area;
+ 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:
+ snd_printk(KERN_ERR SFX "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) {
+ printk(KERN_ERR SFX "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) {
+ printk(KERN_ERR SFX "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_stream *str)
+{
+ /* make sure the run bit is zero for SD */
+ lola_stream_clear(chip, str);
+ /* set up BDL */
+ lola_dsd_write(chip, str->dsd, BDPL, (u32)str->bdl.addr);
+ lola_dsd_write(chip, str->dsd, BDPU, upper_32_bits(str->bdl.addr));
+ /* program the stream LVI (last valid index) of the BDL */
+ lola_dsd_write(chip, str->dsd, LVI, str->frags - 1);
+ lola_stream_stop(chip, str, lola_get_tstamp(chip, false));
+ lola_stream_wait_for_fifo_ready(chip, str);
+
+ return 0;
+}
+
+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);
+
+ if (bufsize != str->bufsize ||
+ period_bytes != str->period_bytes ||
+ format_verb != str->format_verb) {
+ str->bufsize = bufsize;
+ str->period_bytes = period_bytes;
+ str->format_verb = format_verb;
+ err = lola_setup_periods(chip, substream, str);
+ if (err < 0)
+ return err;
+ }
+
+ err = lola_set_stream_config(chip, str, runtime->channels);
+ if (err < 0)
+ return err;
+
+ return lola_setup_controller(chip, str);
+}
+
+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;
+
+ 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;
+ }
+
+ tstamp = lola_get_tstamp(chip, false);
+ 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;
+ 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 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 __devinit lola_create_pcm(struct lola *chip)
+{
+ struct snd_pcm *pcm;
+ int i, 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)
+{
+ /* nothing to do */
+}
+
+/*
+ */
+
+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) {
+ printk(KERN_ERR SFX "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) {
+ printk(KERN_ERR SFX "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) {
+ printk(KERN_ERR SFX "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) {
+ printk(KERN_ERR SFX "Can't read FORMATS 0x%x\n", nid);
+ return err;
+ }
+ val &= 3;
+ if (val == 3)
+ str->can_float = true;
+ if (!(val & 1)) {
+ printk(KERN_ERR SFX "Invalid formats 0x%x for 0x%x", val, nid);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int __devinit 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;
+}