1 files changed, 399 insertions, 0 deletions

diff --git a/drivers/staging/solo6x10/g723.c b/drivers/staging/solo6x10/g723.c
new file mode 100644
index 00000000000..59274bfca95
--- /dev/null
+++ b/drivers/staging/solo6x10/g723.c
@@ -0,0 +1,399 @@
+/*
+ * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
+ * Copyright (C) 2010 Ben Collins <bcollins@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/slab.h>
+#include <linux/freezer.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/control.h>
+#include "solo6x10.h"
+#include "tw28.h"
+
+#define G723_INTR_ORDER         0
+#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 MAX_BUFFER              (G723_PERIOD_BYTES * PERIODS_MAX)
+#define IRQ_PAGES               4 /* 0 - 4 */
+#define PERIODS_MIN             (1 << IRQ_PAGES)
+#define PERIODS_MAX             G723_FDMA_PAGES
+
+struct solo_snd_pcm {
+        int             on;
+        spinlock_t      lock;
+        struct solo_dev *solo_dev;
+        unsigned char   g723_buf[G723_PERIOD_BYTES];
+};
+
+static void solo_g723_config(struct solo_dev *solo_dev)
+{
+        int clk_div;
+
+        clk_div = SOLO_CLOCK_MHZ / (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(IRQ_PAGES) |
+                      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;
+
+        solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_G723);
+
+        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 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               = 8000,
+        .rate_max               = 8000,
+        .channels_min           = 1,
+        .channels_max           = 1,
+        .buffer_bytes_max       = 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)
+                return -ENOMEM;
+
+        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;
+}
+
+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;
+        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(solo_dev, SOLO_P2M_DMA_ID_G723E, 0,
+                                   solo_pcm->g723_buf,
+                                   SOLO_G723_EXT_ADDR(solo_dev) +
+                                   (page * G723_PERIOD_BLOCK) +
+                                   (ss->number * G723_PERIOD_BYTES),
+                                   G723_PERIOD_BYTES);
+                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),
+                                        MAX_BUFFER, 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)
+{
+        solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
+        solo_irq_off(solo_dev, SOLO_IRQ_G723);
+
+        snd_card_free(solo_dev->snd_card);
+}