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path: root/drivers/staging/media/solo6x10/solo6x10-g723.c
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Diffstat (limited to 'drivers/staging/media/solo6x10/solo6x10-g723.c')
-rw-r--r--drivers/staging/media/solo6x10/solo6x10-g723.c424
1 files changed, 424 insertions, 0 deletions
diff --git a/drivers/staging/media/solo6x10/solo6x10-g723.c b/drivers/staging/media/solo6x10/solo6x10-g723.c
new file mode 100644
index 00000000000..1db18c7972a
--- /dev/null
+++ b/drivers/staging/media/solo6x10/solo6x10-g723.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
+ *
+ * Original author:
+ * Ben Collins <bcollins@ubuntu.com>
+ *
+ * Additional work by:
+ * John Brooks <john.brooks@bluecherry.net>
+ *
+ * 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/mempool.h>
+#include <linux/poll.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/control.h>
+
+#include "solo6x10.h"
+#include "solo6x10-tw28.h"
+
+#define G723_FDMA_PAGES 32
+#define G723_PERIOD_BYTES 48
+#define G723_PERIOD_BLOCK 1024
+#define G723_FRAMES_PER_PAGE 48
+
+/* Sets up channels 16-19 for decoding and 0-15 for encoding */
+#define OUTMODE_MASK 0x300
+
+#define SAMPLERATE 8000
+#define BITRATE 25
+
+/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
+ * is broken down to 20 * 48 byte regions (one for each channel possible)
+ * with the rest of the page being dummy data. */
+#define G723_MAX_BUFFER (G723_PERIOD_BYTES * PERIODS_MAX)
+#define G723_INTR_ORDER 4 /* 0 - 4 */
+#define PERIODS_MIN (1 << G723_INTR_ORDER)
+#define PERIODS_MAX G723_FDMA_PAGES
+
+struct solo_snd_pcm {
+ int on;
+ spinlock_t lock;
+ struct solo_dev *solo_dev;
+ unsigned char *g723_buf;
+ dma_addr_t g723_dma;
+};
+
+static void solo_g723_config(struct solo_dev *solo_dev)
+{
+ int clk_div;
+
+ clk_div = (solo_dev->clock_mhz * 1000000)
+ / (SAMPLERATE * (BITRATE * 2) * 2);
+
+ solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
+ SOLO_AUDIO_BITRATE(BITRATE)
+ | SOLO_AUDIO_CLK_DIV(clk_div));
+
+ solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
+ SOLO_AUDIO_FDMA_INTERVAL(1)
+ | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
+ | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
+
+ solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
+ SOLO_AUDIO_ENABLE
+ | SOLO_AUDIO_I2S_MODE
+ | SOLO_AUDIO_I2S_MULTI(3)
+ | SOLO_AUDIO_MODE(OUTMODE_MASK));
+}
+
+void solo_g723_isr(struct solo_dev *solo_dev)
+{
+ struct snd_pcm_str *pstr =
+ &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
+ struct snd_pcm_substream *ss;
+ struct solo_snd_pcm *solo_pcm;
+
+ for (ss = pstr->substream; ss != NULL; ss = ss->next) {
+ if (snd_pcm_substream_chip(ss) == NULL)
+ continue;
+
+ /* This means open() hasn't been called on this one */
+ if (snd_pcm_substream_chip(ss) == solo_dev)
+ continue;
+
+ /* Haven't triggered a start yet */
+ solo_pcm = snd_pcm_substream_chip(ss);
+ if (!solo_pcm->on)
+ continue;
+
+ snd_pcm_period_elapsed(ss);
+ }
+}
+
+static int snd_solo_hw_params(struct snd_pcm_substream *ss,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
+}
+
+static int snd_solo_hw_free(struct snd_pcm_substream *ss)
+{
+ return snd_pcm_lib_free_pages(ss);
+}
+
+static const struct snd_pcm_hardware snd_solo_pcm_hw = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats = SNDRV_PCM_FMTBIT_U8,
+ .rates = SNDRV_PCM_RATE_8000,
+ .rate_min = SAMPLERATE,
+ .rate_max = SAMPLERATE,
+ .channels_min = 1,
+ .channels_max = 1,
+ .buffer_bytes_max = G723_MAX_BUFFER,
+ .period_bytes_min = G723_PERIOD_BYTES,
+ .period_bytes_max = G723_PERIOD_BYTES,
+ .periods_min = PERIODS_MIN,
+ .periods_max = PERIODS_MAX,
+};
+
+static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
+{
+ struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
+ struct solo_snd_pcm *solo_pcm;
+
+ solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
+ if (solo_pcm == NULL)
+ goto oom;
+
+ solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
+ G723_PERIOD_BYTES,
+ &solo_pcm->g723_dma);
+ if (solo_pcm->g723_buf == NULL)
+ goto oom;
+
+ spin_lock_init(&solo_pcm->lock);
+ solo_pcm->solo_dev = solo_dev;
+ ss->runtime->hw = snd_solo_pcm_hw;
+
+ snd_pcm_substream_chip(ss) = solo_pcm;
+
+ return 0;
+
+oom:
+ kfree(solo_pcm);
+ return -ENOMEM;
+}
+
+static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
+{
+ struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
+
+ snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
+ pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
+ solo_pcm->g723_buf, solo_pcm->g723_dma);
+ kfree(solo_pcm);
+
+ return 0;
+}
+
+static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
+{
+ struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
+ struct solo_dev *solo_dev = solo_pcm->solo_dev;
+ int ret = 0;
+
+ spin_lock(&solo_pcm->lock);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (solo_pcm->on == 0) {
+ /* If this is the first user, switch on interrupts */
+ if (atomic_inc_return(&solo_dev->snd_users) == 1)
+ solo_irq_on(solo_dev, SOLO_IRQ_G723);
+ solo_pcm->on = 1;
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ if (solo_pcm->on) {
+ /* If this was our last user, switch them off */
+ if (atomic_dec_return(&solo_dev->snd_users) == 0)
+ solo_irq_off(solo_dev, SOLO_IRQ_G723);
+ solo_pcm->on = 0;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ spin_unlock(&solo_pcm->lock);
+
+ return ret;
+}
+
+static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
+{
+ return 0;
+}
+
+static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
+{
+ struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
+ struct solo_dev *solo_dev = solo_pcm->solo_dev;
+ snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
+
+ return idx * G723_FRAMES_PER_PAGE;
+}
+
+static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,
+ snd_pcm_uframes_t pos, void __user *dst,
+ snd_pcm_uframes_t count)
+{
+ struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
+ struct solo_dev *solo_dev = solo_pcm->solo_dev;
+ int err, i;
+
+ for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
+ int page = (pos / G723_FRAMES_PER_PAGE) + i;
+
+ err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
+ SOLO_G723_EXT_ADDR(solo_dev) +
+ (page * G723_PERIOD_BLOCK) +
+ (ss->number * G723_PERIOD_BYTES),
+ G723_PERIOD_BYTES, 0, 0);
+ if (err)
+ return err;
+
+ err = copy_to_user(dst + (i * G723_PERIOD_BYTES),
+ solo_pcm->g723_buf, G723_PERIOD_BYTES);
+
+ if (err)
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static struct snd_pcm_ops snd_solo_pcm_ops = {
+ .open = snd_solo_pcm_open,
+ .close = snd_solo_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_solo_hw_params,
+ .hw_free = snd_solo_hw_free,
+ .prepare = snd_solo_pcm_prepare,
+ .trigger = snd_solo_pcm_trigger,
+ .pointer = snd_solo_pcm_pointer,
+ .copy = snd_solo_pcm_copy,
+};
+
+static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *info)
+{
+ info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ info->count = 1;
+ info->value.integer.min = 0;
+ info->value.integer.max = 15;
+ info->value.integer.step = 1;
+
+ return 0;
+}
+
+static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
+ u8 ch = value->id.numid - 1;
+
+ value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
+
+ return 0;
+}
+
+static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
+ u8 ch = value->id.numid - 1;
+ u8 old_val;
+
+ old_val = tw28_get_audio_gain(solo_dev, ch);
+ if (old_val == value->value.integer.value[0])
+ return 0;
+
+ tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
+
+ return 1;
+}
+
+static struct snd_kcontrol_new snd_solo_capture_volume = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Capture Volume",
+ .info = snd_solo_capture_volume_info,
+ .get = snd_solo_capture_volume_get,
+ .put = snd_solo_capture_volume_put,
+};
+
+static int solo_snd_pcm_init(struct solo_dev *solo_dev)
+{
+ struct snd_card *card = solo_dev->snd_card;
+ struct snd_pcm *pcm;
+ struct snd_pcm_substream *ss;
+ int ret;
+ int i;
+
+ ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
+ &pcm);
+ if (ret < 0)
+ return ret;
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_solo_pcm_ops);
+
+ snd_pcm_chip(pcm) = solo_dev;
+ pcm->info_flags = 0;
+ strcpy(pcm->name, card->shortname);
+
+ for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+ ss; ss = ss->next, i++)
+ sprintf(ss->name, "Camera #%d Audio", i);
+
+ ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ G723_MAX_BUFFER, G723_MAX_BUFFER);
+ if (ret < 0)
+ return ret;
+
+ solo_dev->snd_pcm = pcm;
+
+ return 0;
+}
+
+int solo_g723_init(struct solo_dev *solo_dev)
+{
+ static struct snd_device_ops ops = { NULL };
+ struct snd_card *card;
+ struct snd_kcontrol_new kctl;
+ char name[32];
+ int ret;
+
+ atomic_set(&solo_dev->snd_users, 0);
+
+ /* Allows for easier mapping between video and audio */
+ sprintf(name, "Softlogic%d", solo_dev->vfd->num);
+
+ ret = snd_card_create(SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
+ &solo_dev->snd_card);
+ if (ret < 0)
+ return ret;
+
+ card = solo_dev->snd_card;
+
+ strcpy(card->driver, SOLO6X10_NAME);
+ strcpy(card->shortname, "SOLO-6x10 Audio");
+ sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
+ pci_name(solo_dev->pdev), solo_dev->pdev->irq);
+ snd_card_set_dev(card, &solo_dev->pdev->dev);
+
+ ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
+ if (ret < 0)
+ goto snd_error;
+
+ /* Mixer controls */
+ strcpy(card->mixername, "SOLO-6x10");
+ kctl = snd_solo_capture_volume;
+ kctl.count = solo_dev->nr_chans;
+
+ ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
+ if (ret < 0)
+ return ret;
+
+ ret = solo_snd_pcm_init(solo_dev);
+ if (ret < 0)
+ goto snd_error;
+
+ ret = snd_card_register(card);
+ if (ret < 0)
+ goto snd_error;
+
+ solo_g723_config(solo_dev);
+
+ dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
+
+ return 0;
+
+snd_error:
+ snd_card_free(card);
+ return ret;
+}
+
+void solo_g723_exit(struct solo_dev *solo_dev)
+{
+ if (!solo_dev->snd_card)
+ return;
+
+ solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
+ solo_irq_off(solo_dev, SOLO_IRQ_G723);
+
+ snd_card_free(solo_dev->snd_card);
+ solo_dev->snd_card = NULL;
+}