--- /dev/null
+/*
+ * ALSA PCM device for the
+ * ALSA interface to cobalt PCM capture streams
+ *
+ * Copyright 2014-2015 Cisco Systems, Inc. and/or its affiliates.
+ * All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+
+#include <media/v4l2-device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "cobalt-driver.h"
+#include "cobalt-alsa.h"
+#include "cobalt-alsa-pcm.h"
+
+static unsigned int pcm_debug;
+module_param(pcm_debug, int, 0644);
+MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm");
+
+#define dprintk(fmt, arg...) \
+ do { \
+ if (pcm_debug) \
+ pr_info("cobalt-alsa-pcm %s: " fmt, __func__, ##arg); \
+ } while (0)
+
+static struct snd_pcm_hardware snd_cobalt_hdmi_capture = {
+ .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID,
+
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+
+ .rates = SNDRV_PCM_RATE_48000,
+
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 4 * 240 * 8 * 4, /* 5 ms of data */
+ .period_bytes_min = 1920, /* 1 sample = 8 * 4 bytes */
+ .period_bytes_max = 240 * 8 * 4, /* 5 ms of 8 channel data */
+ .periods_min = 1,
+ .periods_max = 4,
+};
+
+static struct snd_pcm_hardware snd_cobalt_playback = {
+ .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID,
+
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+
+ .rates = SNDRV_PCM_RATE_48000,
+
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 4 * 240 * 8 * 4, /* 5 ms of data */
+ .period_bytes_min = 1920, /* 1 sample = 8 * 4 bytes */
+ .period_bytes_max = 240 * 8 * 4, /* 5 ms of 8 channel data */
+ .periods_min = 1,
+ .periods_max = 4,
+};
+
+static void sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
+{
+ static const unsigned map[8] = { 0, 1, 5, 4, 2, 3, 6, 7 };
+ unsigned idx = 0;
+
+ while (len >= (is_s32 ? 4 : 2)) {
+ unsigned offset = map[idx] * 4;
+ u32 val = src[offset + 1] + (src[offset + 2] << 8) +
+ (src[offset + 3] << 16);
+
+ if (is_s32) {
+ *dst++ = 0;
+ *dst++ = val & 0xff;
+ }
+ *dst++ = (val >> 8) & 0xff;
+ *dst++ = (val >> 16) & 0xff;
+ len -= is_s32 ? 4 : 2;
+ idx++;
+ }
+}
+
+static void cobalt_alsa_announce_pcm_data(struct snd_cobalt_card *cobsc,
+ u8 *pcm_data,
+ size_t skip,
+ size_t samples)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ unsigned long flags;
+ unsigned int oldptr;
+ unsigned int stride;
+ int length = samples;
+ int period_elapsed = 0;
+ bool is_s32;
+
+ dprintk("cobalt alsa announce ptr=%p data=%p num_bytes=%zd\n", cobsc,
+ pcm_data, samples);
+
+ substream = cobsc->capture_pcm_substream;
+ if (substream == NULL) {
+ dprintk("substream was NULL\n");
+ return;
+ }
+
+ runtime = substream->runtime;
+ if (runtime == NULL) {
+ dprintk("runtime was NULL\n");
+ return;
+ }
+ is_s32 = runtime->format == SNDRV_PCM_FORMAT_S32_LE;
+
+ stride = runtime->frame_bits >> 3;
+ if (stride == 0) {
+ dprintk("stride is zero\n");
+ return;
+ }
+
+ if (length == 0) {
+ dprintk("%s: length was zero\n", __func__);
+ return;
+ }
+
+ if (runtime->dma_area == NULL) {
+ dprintk("dma area was NULL - ignoring\n");
+ return;
+ }
+
+ oldptr = cobsc->hwptr_done_capture;
+ if (oldptr + length >= runtime->buffer_size) {
+ unsigned int cnt = runtime->buffer_size - oldptr;
+ unsigned i;
+
+ for (i = 0; i < cnt; i++)
+ sample_cpy(runtime->dma_area + (oldptr + i) * stride,
+ pcm_data + i * skip,
+ stride, is_s32);
+ for (i = cnt; i < length; i++)
+ sample_cpy(runtime->dma_area + (i - cnt) * stride,
+ pcm_data + i * skip, stride, is_s32);
+ } else {
+ unsigned i;
+
+ for (i = 0; i < length; i++)
+ sample_cpy(runtime->dma_area + (oldptr + i) * stride,
+ pcm_data + i * skip,
+ stride, is_s32);
+ }
+ snd_pcm_stream_lock_irqsave(substream, flags);
+
+ cobsc->hwptr_done_capture += length;
+ if (cobsc->hwptr_done_capture >=
+ runtime->buffer_size)
+ cobsc->hwptr_done_capture -=
+ runtime->buffer_size;
+
+ cobsc->capture_transfer_done += length;
+ if (cobsc->capture_transfer_done >=
+ runtime->period_size) {
+ cobsc->capture_transfer_done -=
+ runtime->period_size;
+ period_elapsed = 1;
+ }
+
+ snd_pcm_stream_unlock_irqrestore(substream, flags);
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(substream);
+}
+
+static int alsa_fnc(struct vb2_buffer *vb, void *priv)
+{
+ struct cobalt_stream *s = priv;
+ unsigned char *p = vb2_plane_vaddr(vb, 0);
+ int i;
+
+ if (pcm_debug) {
+ pr_info("alsa: ");
+ for (i = 0; i < 8 * 4; i++) {
+ if (!(i & 3))
+ pr_cont(" ");
+ pr_cont("%02x", p[i]);
+ }
+ pr_cont("\n");
+ }
+ cobalt_alsa_announce_pcm_data(s->alsa,
+ vb2_plane_vaddr(vb, 0),
+ 8 * 4,
+ vb2_get_plane_payload(vb, 0) / (8 * 4));
+ return 0;
+}
+
+static int snd_cobalt_pcm_capture_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+ struct cobalt_stream *s = cobsc->s;
+
+ runtime->hw = snd_cobalt_hdmi_capture;
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ cobsc->capture_pcm_substream = substream;
+ runtime->private_data = s;
+ cobsc->alsa_record_cnt++;
+ if (cobsc->alsa_record_cnt == 1) {
+ int rc;
+
+ rc = vb2_thread_start(&s->q, alsa_fnc, s, s->vdev.name);
+ if (rc) {
+ cobsc->alsa_record_cnt--;
+ return rc;
+ }
+ }
+ return 0;
+}
+
+static int snd_cobalt_pcm_capture_close(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+ struct cobalt_stream *s = cobsc->s;
+
+ cobsc->alsa_record_cnt--;
+ if (cobsc->alsa_record_cnt == 0)
+ vb2_thread_stop(&s->q);
+ return 0;
+}
+
+static int snd_cobalt_pcm_ioctl(struct snd_pcm_substream *substream,
+ unsigned int cmd, void *arg)
+{
+ return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
+
+static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
+ size_t size)
+{
+ struct snd_pcm_runtime *runtime = subs->runtime;
+
+ dprintk("Allocating vbuffer\n");
+ if (runtime->dma_area) {
+ if (runtime->dma_bytes > size)
+ return 0;
+
+ vfree(runtime->dma_area);
+ }
+ runtime->dma_area = vmalloc(size);
+ if (!runtime->dma_area)
+ return -ENOMEM;
+
+ runtime->dma_bytes = size;
+
+ return 0;
+}
+
+static int snd_cobalt_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ dprintk("%s called\n", __func__);
+
+ return snd_pcm_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(params));
+}
+
+static int snd_cobalt_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ if (substream->runtime->dma_area) {
+ dprintk("freeing pcm capture region\n");
+ vfree(substream->runtime->dma_area);
+ substream->runtime->dma_area = NULL;
+ }
+
+ return 0;
+}
+
+static int snd_cobalt_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+
+ cobsc->hwptr_done_capture = 0;
+ cobsc->capture_transfer_done = 0;
+
+ return 0;
+}
+
+static int snd_cobalt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_STOP:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+snd_pcm_uframes_t snd_cobalt_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ snd_pcm_uframes_t hwptr_done;
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+
+ hwptr_done = cobsc->hwptr_done_capture;
+
+ return hwptr_done;
+}
+
+static void pb_sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
+{
+ static const unsigned map[8] = { 0, 1, 5, 4, 2, 3, 6, 7 };
+ unsigned idx = 0;
+
+ while (len >= (is_s32 ? 4 : 2)) {
+ unsigned offset = map[idx] * 4;
+ u8 *out = dst + offset;
+
+ *out++ = 0;
+ if (is_s32) {
+ src++;
+ *out++ = *src++;
+ } else {
+ *out++ = 0;
+ }
+ *out++ = *src++;
+ *out = *src++;
+ len -= is_s32 ? 4 : 2;
+ idx++;
+ }
+}
+
+static void cobalt_alsa_pb_pcm_data(struct snd_cobalt_card *cobsc,
+ u8 *pcm_data,
+ size_t skip,
+ size_t samples)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ unsigned long flags;
+ unsigned int pos;
+ unsigned int stride;
+ bool is_s32;
+ unsigned i;
+
+ dprintk("cobalt alsa pb ptr=%p data=%p samples=%zd\n", cobsc,
+ pcm_data, samples);
+
+ substream = cobsc->playback_pcm_substream;
+ if (substream == NULL) {
+ dprintk("substream was NULL\n");
+ return;
+ }
+
+ runtime = substream->runtime;
+ if (runtime == NULL) {
+ dprintk("runtime was NULL\n");
+ return;
+ }
+
+ is_s32 = runtime->format == SNDRV_PCM_FORMAT_S32_LE;
+ stride = runtime->frame_bits >> 3;
+ if (stride == 0) {
+ dprintk("stride is zero\n");
+ return;
+ }
+
+ if (samples == 0) {
+ dprintk("%s: samples was zero\n", __func__);
+ return;
+ }
+
+ if (runtime->dma_area == NULL) {
+ dprintk("dma area was NULL - ignoring\n");
+ return;
+ }
+
+ pos = cobsc->pb_pos % cobsc->pb_size;
+ for (i = 0; i < cobsc->pb_count / (8 * 4); i++)
+ pb_sample_cpy(pcm_data + i * skip,
+ runtime->dma_area + pos + i * stride,
+ stride, is_s32);
+ snd_pcm_stream_lock_irqsave(substream, flags);
+
+ cobsc->pb_pos += i * stride;
+
+ snd_pcm_stream_unlock_irqrestore(substream, flags);
+ if (cobsc->pb_pos % cobsc->pb_count == 0)
+ snd_pcm_period_elapsed(substream);
+}
+
+static int alsa_pb_fnc(struct vb2_buffer *vb, void *priv)
+{
+ struct cobalt_stream *s = priv;
+
+ if (s->alsa->alsa_pb_channel)
+ cobalt_alsa_pb_pcm_data(s->alsa,
+ vb2_plane_vaddr(vb, 0),
+ 8 * 4,
+ vb2_get_plane_payload(vb, 0) / (8 * 4));
+ return 0;
+}
+
+static int snd_cobalt_pcm_playback_open(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct cobalt_stream *s = cobsc->s;
+
+ runtime->hw = snd_cobalt_playback;
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ cobsc->playback_pcm_substream = substream;
+ runtime->private_data = s;
+ cobsc->alsa_playback_cnt++;
+ if (cobsc->alsa_playback_cnt == 1) {
+ int rc;
+
+ rc = vb2_thread_start(&s->q, alsa_pb_fnc, s, s->vdev.name);
+ if (rc) {
+ cobsc->alsa_playback_cnt--;
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static int snd_cobalt_pcm_playback_close(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+ struct cobalt_stream *s = cobsc->s;
+
+ cobsc->alsa_playback_cnt--;
+ if (cobsc->alsa_playback_cnt == 0)
+ vb2_thread_stop(&s->q);
+ return 0;
+}
+
+static int snd_cobalt_pcm_pb_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+
+ cobsc->pb_size = snd_pcm_lib_buffer_bytes(substream);
+ cobsc->pb_count = snd_pcm_lib_period_bytes(substream);
+ cobsc->pb_pos = 0;
+
+ return 0;
+}
+
+static int snd_cobalt_pcm_pb_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (cobsc->alsa_pb_channel)
+ return -EBUSY;
+ cobsc->alsa_pb_channel = true;
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ cobsc->alsa_pb_channel = false;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static
+snd_pcm_uframes_t snd_cobalt_pcm_pb_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
+ size_t ptr;
+
+ ptr = cobsc->pb_pos;
+
+ return bytes_to_frames(substream->runtime, ptr) %
+ substream->runtime->buffer_size;
+}
+
+static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
+ unsigned long offset)
+{
+ void *pageptr = subs->runtime->dma_area + offset;
+
+ return vmalloc_to_page(pageptr);
+}
+
+static struct snd_pcm_ops snd_cobalt_pcm_capture_ops = {
+ .open = snd_cobalt_pcm_capture_open,
+ .close = snd_cobalt_pcm_capture_close,
+ .ioctl = snd_cobalt_pcm_ioctl,
+ .hw_params = snd_cobalt_pcm_hw_params,
+ .hw_free = snd_cobalt_pcm_hw_free,
+ .prepare = snd_cobalt_pcm_prepare,
+ .trigger = snd_cobalt_pcm_trigger,
+ .pointer = snd_cobalt_pcm_pointer,
+ .page = snd_pcm_get_vmalloc_page,
+};
+
+static struct snd_pcm_ops snd_cobalt_pcm_playback_ops = {
+ .open = snd_cobalt_pcm_playback_open,
+ .close = snd_cobalt_pcm_playback_close,
+ .ioctl = snd_cobalt_pcm_ioctl,
+ .hw_params = snd_cobalt_pcm_hw_params,
+ .hw_free = snd_cobalt_pcm_hw_free,
+ .prepare = snd_cobalt_pcm_pb_prepare,
+ .trigger = snd_cobalt_pcm_pb_trigger,
+ .pointer = snd_cobalt_pcm_pb_pointer,
+ .page = snd_pcm_get_vmalloc_page,
+};
+
+int snd_cobalt_pcm_create(struct snd_cobalt_card *cobsc)
+{
+ struct snd_pcm *sp;
+ struct snd_card *sc = cobsc->sc;
+ struct cobalt_stream *s = cobsc->s;
+ struct cobalt *cobalt = s->cobalt;
+ int ret;
+
+ s->q.gfp_flags |= __GFP_ZERO;
+
+ if (!s->is_output) {
+ cobalt_s_bit_sysctrl(cobalt,
+ COBALT_SYS_CTRL_AUDIO_IPP_RESETN_BIT(s->video_channel),
+ 0);
+ mdelay(2);
+ cobalt_s_bit_sysctrl(cobalt,
+ COBALT_SYS_CTRL_AUDIO_IPP_RESETN_BIT(s->video_channel),
+ 1);
+ mdelay(1);
+
+ ret = snd_pcm_new(sc, "Cobalt PCM-In HDMI",
+ 0, /* PCM device 0, the only one for this card */
+ 0, /* 0 playback substreams */
+ 1, /* 1 capture substream */
+ &sp);
+ if (ret) {
+ cobalt_err("snd_cobalt_pcm_create() failed for input with err %d\n",
+ ret);
+ goto err_exit;
+ }
+
+ snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_cobalt_pcm_capture_ops);
+ sp->info_flags = 0;
+ sp->private_data = cobsc;
+ strlcpy(sp->name, "cobalt", sizeof(sp->name));
+ } else {
+ cobalt_s_bit_sysctrl(cobalt,
+ COBALT_SYS_CTRL_AUDIO_OPP_RESETN_BIT, 0);
+ mdelay(2);
+ cobalt_s_bit_sysctrl(cobalt,
+ COBALT_SYS_CTRL_AUDIO_OPP_RESETN_BIT, 1);
+ mdelay(1);
+
+ ret = snd_pcm_new(sc, "Cobalt PCM-Out HDMI",
+ 0, /* PCM device 0, the only one for this card */
+ 1, /* 0 playback substreams */
+ 0, /* 1 capture substream */
+ &sp);
+ if (ret) {
+ cobalt_err("snd_cobalt_pcm_create() failed for output with err %d\n",
+ ret);
+ goto err_exit;
+ }
+
+ snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_cobalt_pcm_playback_ops);
+ sp->info_flags = 0;
+ sp->private_data = cobsc;
+ strlcpy(sp->name, "cobalt", sizeof(sp->name));
+ }
+
+ return 0;
+
+err_exit:
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff