To compile this driver as a module, choose M here: the
module will be called ivtv.
+config VIDEO_IVTV_ALSA
+ tristate "Conexant cx23415/cx23416 PCM audio capture support"
+ depends on VIDEO_IVTV && SND && EXPERIMENTAL
+ select SND_PCM
+ ---help---
+ This is an ALSA interface driver for direct PCM audio capture from
+ Conexant cx23415/cx23416 based PCI TV cards using the ivtv driver.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ivtv-alsa.
+
config VIDEO_FB_IVTV
tristate "Conexant cx23415 framebuffer support"
depends on VIDEO_IVTV && FB
ivtv-gpio.o ivtv-i2c.o ivtv-ioctl.o ivtv-irq.o \
ivtv-mailbox.o ivtv-queue.o ivtv-streams.o ivtv-udma.o \
ivtv-vbi.o ivtv-yuv.o
+ivtv-alsa-objs := ivtv-alsa-main.o ivtv-alsa-pcm.o
obj-$(CONFIG_VIDEO_IVTV) += ivtv.o
+obj-$(CONFIG_VIDEO_IVTV_ALSA) += ivtv-alsa.o
obj-$(CONFIG_VIDEO_FB_IVTV) += ivtvfb.o
ccflags-y += -I$(srctree)/drivers/media/i2c
--- /dev/null
+/*
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
+ * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
+ *
+ * Portions of this work were sponsored by ONELAN Limited for the cx18 driver
+ *
+ * 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/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+
+#include <media/v4l2-device.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+
+#include "ivtv-driver.h"
+#include "ivtv-version.h"
+#include "ivtv-alsa.h"
+#include "ivtv-alsa-mixer.h"
+#include "ivtv-alsa-pcm.h"
+
+int ivtv_alsa_debug;
+
+#define IVTV_DEBUG_ALSA_INFO(fmt, arg...) \
+ do { \
+ if (ivtv_alsa_debug & 2) \
+ pr_info("%s: " fmt, "ivtv-alsa", ## arg); \
+ } while (0)
+
+module_param_named(debug, ivtv_alsa_debug, int, 0644);
+MODULE_PARM_DESC(debug,
+ "Debug level (bitmask). Default: 0\n"
+ "\t\t\t 1/0x0001: warning\n"
+ "\t\t\t 2/0x0002: info\n");
+
+MODULE_AUTHOR("Andy Walls");
+MODULE_DESCRIPTION("CX23415/CX23416 ALSA Interface");
+MODULE_SUPPORTED_DEVICE("CX23415/CX23416 MPEG2 encoder");
+MODULE_LICENSE("GPL");
+
+MODULE_VERSION(IVTV_VERSION);
+
+static inline
+struct snd_ivtv_card *to_snd_ivtv_card(struct v4l2_device *v4l2_dev)
+{
+ return to_ivtv(v4l2_dev)->alsa;
+}
+
+static inline
+struct snd_ivtv_card *p_to_snd_ivtv_card(struct v4l2_device **v4l2_dev)
+{
+ return container_of(v4l2_dev, struct snd_ivtv_card, v4l2_dev);
+}
+
+static void snd_ivtv_card_free(struct snd_ivtv_card *itvsc)
+{
+ if (itvsc == NULL)
+ return;
+
+ if (itvsc->v4l2_dev != NULL)
+ to_ivtv(itvsc->v4l2_dev)->alsa = NULL;
+
+ /* FIXME - take any other stopping actions needed */
+
+ kfree(itvsc);
+}
+
+static void snd_ivtv_card_private_free(struct snd_card *sc)
+{
+ if (sc == NULL)
+ return;
+ snd_ivtv_card_free(sc->private_data);
+ sc->private_data = NULL;
+ sc->private_free = NULL;
+}
+
+static int snd_ivtv_card_create(struct v4l2_device *v4l2_dev,
+ struct snd_card *sc,
+ struct snd_ivtv_card **itvsc)
+{
+ *itvsc = kzalloc(sizeof(struct snd_ivtv_card), GFP_KERNEL);
+ if (*itvsc == NULL)
+ return -ENOMEM;
+
+ (*itvsc)->v4l2_dev = v4l2_dev;
+ (*itvsc)->sc = sc;
+
+ sc->private_data = *itvsc;
+ sc->private_free = snd_ivtv_card_private_free;
+
+ return 0;
+}
+
+static int snd_ivtv_card_set_names(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ struct snd_card *sc = itvsc->sc;
+
+ /* sc->driver is used by alsa-lib's configurator: simple, unique */
+ strlcpy(sc->driver, "CX2341[56]", sizeof(sc->driver));
+
+ /* sc->shortname is a symlink in /proc/asound: IVTV-M -> cardN */
+ snprintf(sc->shortname, sizeof(sc->shortname), "IVTV-%d",
+ itv->instance);
+
+ /* sc->longname is read from /proc/asound/cards */
+ snprintf(sc->longname, sizeof(sc->longname),
+ "CX2341[56] #%d %s TV/FM Radio/Line-In Capture",
+ itv->instance, itv->card_name);
+
+ return 0;
+}
+
+static int snd_ivtv_init(struct v4l2_device *v4l2_dev)
+{
+ struct ivtv *itv = to_ivtv(v4l2_dev);
+ struct snd_card *sc = NULL;
+ struct snd_ivtv_card *itvsc;
+ int ret;
+
+ /* Numbrs steps from "Writing an ALSA Driver" by Takashi Iwai */
+
+ /* (1) Check and increment the device index */
+ /* This is a no-op for us. We'll use the itv->instance */
+
+ /* (2) Create a card instance */
+ ret = snd_card_create(SNDRV_DEFAULT_IDX1, /* use first available id */
+ SNDRV_DEFAULT_STR1, /* xid from end of shortname*/
+ THIS_MODULE, 0, &sc);
+ if (ret) {
+ IVTV_ALSA_ERR("%s: snd_card_create() failed with err %d\n",
+ __func__, ret);
+ goto err_exit;
+ }
+
+ /* (3) Create a main component */
+ ret = snd_ivtv_card_create(v4l2_dev, sc, &itvsc);
+ if (ret) {
+ IVTV_ALSA_ERR("%s: snd_ivtv_card_create() failed with err %d\n",
+ __func__, ret);
+ goto err_exit_free;
+ }
+
+ /* (4) Set the driver ID and name strings */
+ snd_ivtv_card_set_names(itvsc);
+
+ /* (5) Create other components: mixer, PCM, & proc files */
+#if 0
+ ret = snd_ivtv_mixer_create(itvsc);
+ if (ret) {
+ IVTV_ALSA_WARN("%s: snd_ivtv_mixer_create() failed with err %d:"
+ " proceeding anyway\n", __func__, ret);
+ }
+#endif
+
+ ret = snd_ivtv_pcm_create(itvsc);
+ if (ret) {
+ IVTV_ALSA_ERR("%s: snd_ivtv_pcm_create() failed with err %d\n",
+ __func__, ret);
+ goto err_exit_free;
+ }
+ /* FIXME - proc files */
+
+ /* (7) Set the driver data and return 0 */
+ /* We do this out of normal order for PCI drivers to avoid races */
+ itv->alsa = itvsc;
+
+ /* (6) Register the card instance */
+ ret = snd_card_register(sc);
+ if (ret) {
+ itv->alsa = NULL;
+ IVTV_ALSA_ERR("%s: snd_card_register() failed with err %d\n",
+ __func__, ret);
+ goto err_exit_free;
+ }
+
+ return 0;
+
+err_exit_free:
+ if (sc != NULL)
+ snd_card_free(sc);
+ kfree(itvsc);
+err_exit:
+ return ret;
+}
+
+int ivtv_alsa_load(struct ivtv *itv)
+{
+ struct v4l2_device *v4l2_dev = &itv->v4l2_dev;
+ struct ivtv_stream *s;
+
+ if (v4l2_dev == NULL) {
+ pr_err("ivtv-alsa: %s: struct v4l2_device * is NULL\n",
+ __func__);
+ return 0;
+ }
+
+ itv = to_ivtv(v4l2_dev);
+ if (itv == NULL) {
+ pr_err("ivtv-alsa itv is NULL\n");
+ return 0;
+ }
+
+ s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
+ if (s->vdev == NULL) {
+ IVTV_DEBUG_ALSA_INFO("%s: PCM stream for card is disabled - "
+ "skipping\n", __func__);
+ return 0;
+ }
+
+ if (itv->alsa != NULL) {
+ IVTV_ALSA_ERR("%s: struct snd_ivtv_card * already exists\n",
+ __func__);
+ return 0;
+ }
+
+ if (snd_ivtv_init(v4l2_dev)) {
+ IVTV_ALSA_ERR("%s: failed to create struct snd_ivtv_card\n",
+ __func__);
+ } else {
+ IVTV_DEBUG_ALSA_INFO("%s: created ivtv ALSA interface instance "
+ "\n", __func__);
+ }
+ return 0;
+}
+
+static int __init ivtv_alsa_init(void)
+{
+ pr_info("ivtv-alsa: module loading...\n");
+ ivtv_ext_init = &ivtv_alsa_load;
+ return 0;
+}
+
+static void __exit snd_ivtv_exit(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+
+ /* FIXME - pointer checks & shutdown itvsc */
+
+ snd_card_free(itvsc->sc);
+ itv->alsa = NULL;
+}
+
+static int __exit ivtv_alsa_exit_callback(struct device *dev, void *data)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
+ struct snd_ivtv_card *itvsc;
+
+ if (v4l2_dev == NULL) {
+ pr_err("ivtv-alsa: %s: struct v4l2_device * is NULL\n",
+ __func__);
+ return 0;
+ }
+
+ itvsc = to_snd_ivtv_card(v4l2_dev);
+ if (itvsc == NULL) {
+ IVTV_ALSA_WARN("%s: struct snd_ivtv_card * is NULL\n",
+ __func__);
+ return 0;
+ }
+
+ snd_ivtv_exit(itvsc);
+ return 0;
+}
+
+static void __exit ivtv_alsa_exit(void)
+{
+ struct device_driver *drv;
+ int ret;
+
+ pr_info("ivtv-alsa: module unloading...\n");
+
+ drv = driver_find("ivtv", &pci_bus_type);
+ ret = driver_for_each_device(drv, NULL, NULL, ivtv_alsa_exit_callback);
+ (void)ret; /* suppress compiler warning */
+
+ ivtv_ext_init = NULL;
+ pr_info("ivtv-alsa: module unload complete\n");
+}
+
+module_init(ivtv_alsa_init);
+module_exit(ivtv_alsa_exit);
--- /dev/null
+/*
+ * ALSA mixer controls for the
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.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/init.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-device.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/tlv.h>
+
+#include "ivtv-alsa.h"
+#include "ivtv-driver.h"
+
+/*
+ * Note the cx25840-core volume scale is funny, due to the alignment of the
+ * scale with another chip's range:
+ *
+ * v4l2_control value /512 indicated dB actual dB reg 0x8d4
+ * 0x0000 - 0x01ff 0 -119 -96 228
+ * 0x0200 - 0x02ff 1 -118 -96 228
+ * ...
+ * 0x2c00 - 0x2dff 22 -97 -96 228
+ * 0x2e00 - 0x2fff 23 -96 -96 228
+ * 0x3000 - 0x31ff 24 -95 -95 226
+ * ...
+ * 0xee00 - 0xefff 119 0 0 36
+ * ...
+ * 0xfe00 - 0xffff 127 +8 +8 20
+ */
+static inline int dB_to_cx25840_vol(int dB)
+{
+ if (dB < -96)
+ dB = -96;
+ else if (dB > 8)
+ dB = 8;
+ return (dB + 119) << 9;
+}
+
+static inline int cx25840_vol_to_dB(int v)
+{
+ if (v < (23 << 9))
+ v = (23 << 9);
+ else if (v > (127 << 9))
+ v = (127 << 9);
+ return (v >> 9) - 119;
+}
+
+static int snd_ivtv_mixer_tv_vol_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ /* We're already translating values, just keep this control in dB */
+ uinfo->value.integer.min = -96;
+ uinfo->value.integer.max = 8;
+ uinfo->value.integer.step = 1;
+ return 0;
+}
+
+static int snd_ivtv_mixer_tv_vol_get(struct snd_kcontrol *kctl,
+ struct snd_ctl_elem_value *uctl)
+{
+ struct snd_ivtv_card *itvsc = snd_kcontrol_chip(kctl);
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ struct v4l2_control vctrl;
+ int ret;
+
+ vctrl.id = V4L2_CID_AUDIO_VOLUME;
+ vctrl.value = dB_to_cx25840_vol(uctl->value.integer.value[0]);
+
+ snd_ivtv_lock(itvsc);
+ ret = v4l2_subdev_call(itv->sd_audio, core, g_ctrl, &vctrl);
+ snd_ivtv_unlock(itvsc);
+
+ if (!ret)
+ uctl->value.integer.value[0] = cx25840_vol_to_dB(vctrl.value);
+ return ret;
+}
+
+static int snd_ivtv_mixer_tv_vol_put(struct snd_kcontrol *kctl,
+ struct snd_ctl_elem_value *uctl)
+{
+ struct snd_ivtv_card *itvsc = snd_kcontrol_chip(kctl);
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ struct v4l2_control vctrl;
+ int ret;
+
+ vctrl.id = V4L2_CID_AUDIO_VOLUME;
+ vctrl.value = dB_to_cx25840_vol(uctl->value.integer.value[0]);
+
+ snd_ivtv_lock(itvsc);
+
+ /* Fetch current state */
+ ret = v4l2_subdev_call(itv->sd_audio, core, g_ctrl, &vctrl);
+
+ if (ret ||
+ (cx25840_vol_to_dB(vctrl.value) != uctl->value.integer.value[0])) {
+
+ /* Set, if needed */
+ vctrl.value = dB_to_cx25840_vol(uctl->value.integer.value[0]);
+ ret = v4l2_subdev_call(itv->sd_audio, core, s_ctrl, &vctrl);
+ if (!ret)
+ ret = 1; /* Indicate control was changed w/o error */
+ }
+ snd_ivtv_unlock(itvsc);
+
+ return ret;
+}
+
+
+/* This is a bit of overkill, the slider is already in dB internally */
+static DECLARE_TLV_DB_SCALE(snd_ivtv_mixer_tv_vol_db_scale, -9600, 100, 0);
+
+static struct snd_kcontrol_new snd_ivtv_mixer_tv_vol __initdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Analog TV Capture Volume",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+ .info = snd_ivtv_mixer_tv_volume_info,
+ .get = snd_ivtv_mixer_tv_volume_get,
+ .put = snd_ivtv_mixer_tv_volume_put,
+ .tlv.p = snd_ivtv_mixer_tv_vol_db_scale
+};
+
+/* FIXME - add mute switch and balance, bass, treble sliders:
+ V4L2_CID_AUDIO_MUTE
+
+ V4L2_CID_AUDIO_BALANCE
+
+ V4L2_CID_AUDIO_BASS
+ V4L2_CID_AUDIO_TREBLE
+*/
+
+/* FIXME - add stereo, lang1, lang2, mono menu */
+/* FIXME - add I2S volume */
+
+int __init snd_ivtv_mixer_create(struct snd_ivtv_card *itvsc)
+{
+ struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
+ struct snd_card *sc = itvsc->sc;
+ int ret;
+
+ strlcpy(sc->mixername, "CX2341[56] Mixer", sizeof(sc->mixername));
+
+ ret = snd_ctl_add(sc, snd_ctl_new1(snd_ivtv_mixer_tv_vol, itvsc));
+ if (ret) {
+ IVTV_ALSA_WARN("%s: failed to add %s control, err %d\n",
+ __func__, snd_ivtv_mixer_tv_vol.name, ret);
+ }
+ return ret;
+}
--- /dev/null
+/*
+ * ALSA mixer controls for the
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.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
+ */
+
+int __init snd_ivtv_mixer_create(struct snd_ivtv_card *itvsc);
--- /dev/null
+/*
+ * ALSA PCM device for the
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
+ * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
+ *
+ * Portions of this work were sponsored by ONELAN Limited for the cx18 driver
+ *
+ * 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/init.h>
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+#include <linux/printk.h>
+
+#include <media/v4l2-device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "ivtv-driver.h"
+#include "ivtv-queue.h"
+#include "ivtv-streams.h"
+#include "ivtv-fileops.h"
+#include "ivtv-alsa.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("ivtv-alsa-pcm %s: " fmt, __func__, ##arg); \
+ } while (0)
+
+static struct snd_pcm_hardware snd_ivtv_hw_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,
+
+ .rates = SNDRV_PCM_RATE_48000,
+
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
+ .period_bytes_min = 64, /* 12544/2, */
+ .period_bytes_max = 12544,
+ .periods_min = 2,
+ .periods_max = 98, /* 12544, */
+};
+
+void ivtv_alsa_announce_pcm_data(struct snd_ivtv_card *itvsc, u8 *pcm_data,
+ size_t num_bytes)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ unsigned int oldptr;
+ unsigned int stride;
+ int period_elapsed = 0;
+ int length;
+
+ dprintk("ivtv alsa announce ptr=%p data=%p num_bytes=%zd\n", itvsc,
+ pcm_data, num_bytes);
+
+ substream = itvsc->capture_pcm_substream;
+ if (substream == NULL) {
+ dprintk("substream was NULL\n");
+ return;
+ }
+
+ runtime = substream->runtime;
+ if (runtime == NULL) {
+ dprintk("runtime was NULL\n");
+ return;
+ }
+
+ stride = runtime->frame_bits >> 3;
+ if (stride == 0) {
+ dprintk("stride is zero\n");
+ return;
+ }
+
+ length = num_bytes / stride;
+ 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 = itvsc->hwptr_done_capture;
+ if (oldptr + length >= runtime->buffer_size) {
+ unsigned int cnt =
+ runtime->buffer_size - oldptr;
+ memcpy(runtime->dma_area + oldptr * stride, pcm_data,
+ cnt * stride);
+ memcpy(runtime->dma_area, pcm_data + cnt * stride,
+ length * stride - cnt * stride);
+ } else {
+ memcpy(runtime->dma_area + oldptr * stride, pcm_data,
+ length * stride);
+ }
+ snd_pcm_stream_lock(substream);
+
+ itvsc->hwptr_done_capture += length;
+ if (itvsc->hwptr_done_capture >=
+ runtime->buffer_size)
+ itvsc->hwptr_done_capture -=
+ runtime->buffer_size;
+
+ itvsc->capture_transfer_done += length;
+ if (itvsc->capture_transfer_done >=
+ runtime->period_size) {
+ itvsc->capture_transfer_done -=
+ runtime->period_size;
+ period_elapsed = 1;
+ }
+
+ snd_pcm_stream_unlock(substream);
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(substream);
+}
+
+static int snd_ivtv_pcm_capture_open(struct snd_pcm_substream *substream)
+{
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
+ struct ivtv *itv = to_ivtv(v4l2_dev);
+ struct ivtv_stream *s;
+ struct ivtv_open_id item;
+ int ret;
+
+ /* Instruct the CX2341[56] to start sending packets */
+ snd_ivtv_lock(itvsc);
+ s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
+
+ v4l2_fh_init(&item.fh, s->vdev);
+ item.itv = itv;
+ item.type = s->type;
+
+ /* See if the stream is available */
+ if (ivtv_claim_stream(&item, item.type)) {
+ /* No, it's already in use */
+ snd_ivtv_unlock(itvsc);
+ return -EBUSY;
+ }
+
+ if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) ||
+ test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
+ /* We're already streaming. No additional action required */
+ snd_ivtv_unlock(itvsc);
+ return 0;
+ }
+
+
+ runtime->hw = snd_ivtv_hw_capture;
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ itvsc->capture_pcm_substream = substream;
+ runtime->private_data = itv;
+
+ itv->pcm_announce_callback = ivtv_alsa_announce_pcm_data;
+
+ /* Not currently streaming, so start it up */
+ set_bit(IVTV_F_S_STREAMING, &s->s_flags);
+ ret = ivtv_start_v4l2_encode_stream(s);
+ snd_ivtv_unlock(itvsc);
+
+ return ret;
+}
+
+static int snd_ivtv_pcm_capture_close(struct snd_pcm_substream *substream)
+{
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+ struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
+ struct ivtv *itv = to_ivtv(v4l2_dev);
+ struct ivtv_stream *s;
+
+ /* Instruct the ivtv to stop sending packets */
+ snd_ivtv_lock(itvsc);
+ s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
+ ivtv_stop_v4l2_encode_stream(s, 0);
+ clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
+
+ ivtv_release_stream(s);
+
+ itv->pcm_announce_callback = NULL;
+ snd_ivtv_unlock(itvsc);
+
+ return 0;
+}
+
+static int snd_ivtv_pcm_ioctl(struct snd_pcm_substream *substream,
+ unsigned int cmd, void *arg)
+{
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+ int ret;
+
+ snd_ivtv_lock(itvsc);
+ ret = snd_pcm_lib_ioctl(substream, cmd, arg);
+ snd_ivtv_unlock(itvsc);
+ return ret;
+}
+
+
+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_ivtv_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_ivtv_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+ unsigned long flags;
+
+ spin_lock_irqsave(&itvsc->slock, flags);
+ if (substream->runtime->dma_area) {
+ dprintk("freeing pcm capture region\n");
+ vfree(substream->runtime->dma_area);
+ substream->runtime->dma_area = NULL;
+ }
+ spin_unlock_irqrestore(&itvsc->slock, flags);
+
+ return 0;
+}
+
+static int snd_ivtv_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+
+ itvsc->hwptr_done_capture = 0;
+ itvsc->capture_transfer_done = 0;
+
+ return 0;
+}
+
+static int snd_ivtv_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ return 0;
+}
+
+static
+snd_pcm_uframes_t snd_ivtv_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ unsigned long flags;
+ snd_pcm_uframes_t hwptr_done;
+ struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
+
+ spin_lock_irqsave(&itvsc->slock, flags);
+ hwptr_done = itvsc->hwptr_done_capture;
+ spin_unlock_irqrestore(&itvsc->slock, flags);
+
+ return hwptr_done;
+}
+
+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_ivtv_pcm_capture_ops = {
+ .open = snd_ivtv_pcm_capture_open,
+ .close = snd_ivtv_pcm_capture_close,
+ .ioctl = snd_ivtv_pcm_ioctl,
+ .hw_params = snd_ivtv_pcm_hw_params,
+ .hw_free = snd_ivtv_pcm_hw_free,
+ .prepare = snd_ivtv_pcm_prepare,
+ .trigger = snd_ivtv_pcm_trigger,
+ .pointer = snd_ivtv_pcm_pointer,
+ .page = snd_pcm_get_vmalloc_page,
+};
+
+int snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc)
+{
+ struct snd_pcm *sp;
+ struct snd_card *sc = itvsc->sc;
+ struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
+ struct ivtv *itv = to_ivtv(v4l2_dev);
+ int ret;
+
+ ret = snd_pcm_new(sc, "CX2341[56] PCM",
+ 0, /* PCM device 0, the only one for this card */
+ 0, /* 0 playback substreams */
+ 1, /* 1 capture substream */
+ &sp);
+ if (ret) {
+ IVTV_ALSA_ERR("%s: snd_ivtv_pcm_create() failed with err %d\n",
+ __func__, ret);
+ goto err_exit;
+ }
+
+ spin_lock_init(&itvsc->slock);
+
+ snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_ivtv_pcm_capture_ops);
+ sp->info_flags = 0;
+ sp->private_data = itvsc;
+ strlcpy(sp->name, itv->card_name, sizeof(sp->name));
+
+ return 0;
+
+err_exit:
+ return ret;
+}
--- /dev/null
+/*
+ * ALSA PCM device for the
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.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
+ */
+
+int __init snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc);
+
+/* Used by ivtv driver to announce the PCM data to the module */
+void ivtv_alsa_announce_pcm_data(struct snd_ivtv_card *card, u8 *pcm_data,
+ size_t num_bytes);
--- /dev/null
+/*
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
+ * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
+ *
+ * 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
+ */
+
+struct snd_card;
+
+struct snd_ivtv_card {
+ struct v4l2_device *v4l2_dev;
+ struct snd_card *sc;
+ unsigned int capture_transfer_done;
+ unsigned int hwptr_done_capture;
+ struct snd_pcm_substream *capture_pcm_substream;
+ spinlock_t slock;
+};
+
+extern int ivtv_alsa_debug;
+
+/*
+ * File operations that manipulate the encoder or video or audio subdevices
+ * need to be serialized. Use the same lock we use for v4l2 file ops.
+ */
+static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ mutex_lock(&itv->serialize_lock);
+}
+
+static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ mutex_unlock(&itv->serialize_lock);
+}
+
+#define IVTV_ALSA_DBGFLG_WARN (1 << 0)
+#define IVTV_ALSA_DBGFLG_INFO (1 << 1)
+
+#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
+ do { \
+ if ((x) & ivtv_alsa_debug) \
+ pr_info("%s-alsa: " type ": " fmt, \
+ v4l2_dev->name , ## args); \
+ } while (0)
+
+#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
+ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
+
+#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
+ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
+
+#define IVTV_ALSA_ERR(fmt, args...) \
+ pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define IVTV_ALSA_WARN(fmt, args...) \
+ pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define IVTV_ALSA_INFO(fmt, args...) \
+ pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
setting this to 1 you ensure that radio0 is now also radio1. */
int ivtv_first_minor;
+/* Callback for registering extensions */
+int (*ivtv_ext_init)(struct ivtv *);
+EXPORT_SYMBOL(ivtv_ext_init);
+
/* add your revision and whatnot here */
static struct pci_device_id ivtv_pci_tbl[] __devinitdata = {
{PCI_VENDOR_ID_ICOMP, PCI_DEVICE_ID_IVTV15,
MODULE_VERSION(IVTV_VERSION);
+#if defined(CONFIG_MODULES) && defined(MODULE)
+static void request_module_async(struct work_struct *work)
+{
+ struct ivtv *dev = container_of(work, struct ivtv, request_module_wk);
+
+ /* Make sure ivtv-alsa module is loaded */
+ request_module("ivtv-alsa");
+
+ /* Initialize ivtv-alsa for this instance of the cx18 device */
+ if (ivtv_ext_init != NULL)
+ ivtv_ext_init(dev);
+}
+
+static void request_modules(struct ivtv *dev)
+{
+ INIT_WORK(&dev->request_module_wk, request_module_async);
+ schedule_work(&dev->request_module_wk);
+}
+
+static void flush_request_modules(struct ivtv *dev)
+{
+ flush_work_sync(&dev->request_module_wk);
+}
+#else
+#define request_modules(dev)
+#define flush_request_modules(dev)
+#endif /* CONFIG_MODULES */
+
void ivtv_clear_irq_mask(struct ivtv *itv, u32 mask)
{
itv->irqmask &= ~mask;
goto free_streams;
}
IVTV_INFO("Initialized card: %s\n", itv->card_name);
+
+ /* Load ivtv submodules (ivtv-alsa) */
+ request_modules(itv);
return 0;
free_streams:
IVTV_DEBUG_INFO("Removing card\n");
+ flush_request_modules(itv);
+
if (test_bit(IVTV_F_I_INITED, &itv->i_flags)) {
/* Stop all captures */
IVTV_DEBUG_INFO("Stopping all streams\n");
atomic_t capturing; /* count number of active capture streams */
atomic_t decoding; /* count number of active decoding streams */
+ /* ALSA interface for PCM capture stream */
+ struct snd_ivtv_card *alsa;
+ void (*pcm_announce_callback)(struct snd_ivtv_card *card, u8 *pcm_data,
+ size_t num_bytes);
+
+ /* Used for ivtv-alsa module loading */
+ struct work_struct request_module_wk;
/* Interrupts & DMA */
u32 irqmask; /* active interrupts */
return container_of(v4l2_dev, struct ivtv, v4l2_dev);
}
+/* ivtv extensions to be loaded */
+extern int (*ivtv_ext_init)(struct ivtv *);
+
/* Globals */
extern int ivtv_first_minor;
associated VBI streams are also automatically claimed.
Possible error returns: -EBUSY if someone else has claimed
the stream or 0 on success. */
-static int ivtv_claim_stream(struct ivtv_open_id *id, int type)
+int ivtv_claim_stream(struct ivtv_open_id *id, int type)
{
struct ivtv *itv = id->itv;
struct ivtv_stream *s = &itv->streams[type];
set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags);
return 0;
}
+EXPORT_SYMBOL(ivtv_claim_stream);
/* This function releases a previously claimed stream. It will take into
account associated VBI streams. */
clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags);
ivtv_flush_queues(s_vbi);
}
+EXPORT_SYMBOL(ivtv_release_stream);
static void ivtv_dualwatch(struct ivtv *itv)
{
void ivtv_unmute(struct ivtv *itv);
/* Utilities */
-
-/* Release a previously claimed stream. */
+/* Shared with ivtv-alsa module */
+int ivtv_claim_stream(struct ivtv_open_id *id, int type);
void ivtv_release_stream(struct ivtv_stream *s);
#endif
atomic_inc(&itv->capturing);
return 0;
}
+EXPORT_SYMBOL(ivtv_start_v4l2_encode_stream);
static int ivtv_setup_v4l2_decode_stream(struct ivtv_stream *s)
{
return 0;
}
+EXPORT_SYMBOL(ivtv_stop_v4l2_encode_stream);
int ivtv_stop_v4l2_decode_stream(struct ivtv_stream *s, int flags, u64 pts)
{
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff