1 files changed, 393 insertions, 0 deletions

diff --git a/drivers/media/pci/solo6x10/solo6x10-g723.c b/drivers/media/pci/solo6x10/solo6x10-g723.c
new file mode 100644
index 0000000000..1db9f40ee0
--- /dev/null
+++ b/drivers/media/pci/solo6x10/solo6x10-g723.c
@@ -0,0 +1,393 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com>
+ *
+ * Original author:
+ * Ben Collins <bcollins@ubuntu.com>
+ *
+ * Additional work by:
+ * John Brooks <john.brooks@bluecherry.net>
+ */
+
+#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 PERIODS			G723_FDMA_PAGES
+#define G723_INTR_ORDER		4 /* 0 - 4 */
+
+struct solo_snd_pcm {
+	int				on;
+	spinlock_t			lock;
+	struct solo_dev			*solo_dev;
+	u8				*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 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_PERIOD_BYTES * PERIODS,
+	.period_bytes_min	= G723_PERIOD_BYTES,
+	.period_bytes_max	= G723_PERIOD_BYTES,
+	.periods_min		= PERIODS,
+	.periods_max		= PERIODS,
+};
+
+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 = dma_alloc_coherent(&solo_dev->pdev->dev,
+						G723_PERIOD_BYTES,
+						&solo_pcm->g723_dma,
+						GFP_KERNEL);
+	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;
+	dma_free_coherent(&solo_pcm->solo_dev->pdev->dev, 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,
+			     unsigned long pos, struct iov_iter *dst,
+			     unsigned long 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;
+
+		if (copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst) !=
+		    G723_PERIOD_BYTES)
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static const struct snd_pcm_ops snd_solo_pcm_ops = {
+	.open = snd_solo_pcm_open,
+	.close = snd_solo_pcm_close,
+	.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 const 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;
+	strscpy(pcm->name, card->shortname, sizeof(pcm->name));
+
+	for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+	     ss; ss = ss->next, i++)
+		sprintf(ss->name, "Camera #%d Audio", i);
+
+	snd_pcm_set_managed_buffer_all(pcm,
+				       SNDRV_DMA_TYPE_CONTINUOUS,
+				       NULL,
+				       G723_PERIOD_BYTES * PERIODS,
+				       G723_PERIOD_BYTES * PERIODS);
+
+	solo_dev->snd_pcm = pcm;
+
+	return 0;
+}
+
+int solo_g723_init(struct solo_dev *solo_dev)
+{
+	static struct snd_device_ops ops = { };
+	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_new(&solo_dev->pdev->dev,
+			   SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
+			   &solo_dev->snd_card);
+	if (ret < 0)
+		return ret;
+
+	card = solo_dev->snd_card;
+
+	strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver));
+	strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname));
+	sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
+		pci_name(solo_dev->pdev), solo_dev->pdev->irq);
+
+	ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
+	if (ret < 0)
+		goto snd_error;
+
+	/* Mixer controls */
+	strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername));
+	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)
+		goto snd_error;
+
+	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;
+}