mirror of https://gitee.com/openkylin/linux.git
[media] ivtv, ivtv-alsa: Add initial ivtv-alsa interface driver for ivtv
This is a cut-and-paste port of the cx18-alsa driver to create an ivtv-alsa interface module for the ivtv driver. It is not actually hooked-up to the PCM stream DMA buffers from the ivtv driver yet. That will be done in a coming change, since that portion is so very different from the cx18 driver. This code has all or more of the bugs and shortcomings of the cx18-alsa interface driver: inconsistent use of itvsc->slock, ivtv-alsa-mixer.c is dead code, assumes 48 ksps regardless of the actual setting of the audio capture, problems with proper struct ivtv and struct ivtv_stream housekeeping, struct ivtv_open_id.v4l2_fh abuse, and $DIETY knows what else. Signed-off-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls
Mauro Carvalho Chehab
parent
6d60805fd2
commit
269c11fbac
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@ -28,6 +28,17 @@ config VIDEO_IVTV
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To compile this driver as a module, choose M here: the
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module will be called ivtv.
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config VIDEO_IVTV_ALSA
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tristate "Conexant cx23415/cx23416 PCM audio capture support"
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depends on VIDEO_IVTV && SND && EXPERIMENTAL
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select SND_PCM
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---help---
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This is an ALSA interface driver for direct PCM audio capture from
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Conexant cx23415/cx23416 based PCI TV cards using the ivtv driver.
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To compile this driver as a module, choose M here: the
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module will be called ivtv-alsa.
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config VIDEO_FB_IVTV
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tristate "Conexant cx23415 framebuffer support"
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depends on VIDEO_IVTV && FB
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@ -3,8 +3,10 @@ ivtv-objs := ivtv-routing.o ivtv-cards.o ivtv-controls.o \
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ivtv-gpio.o ivtv-i2c.o ivtv-ioctl.o ivtv-irq.o \
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ivtv-mailbox.o ivtv-queue.o ivtv-streams.o ivtv-udma.o \
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ivtv-vbi.o ivtv-yuv.o
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ivtv-alsa-objs := ivtv-alsa-main.o ivtv-alsa-pcm.o
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obj-$(CONFIG_VIDEO_IVTV) += ivtv.o
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obj-$(CONFIG_VIDEO_IVTV_ALSA) += ivtv-alsa.o
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obj-$(CONFIG_VIDEO_FB_IVTV) += ivtvfb.o
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ccflags-y += -I$(srctree)/drivers/media/i2c
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@ -0,0 +1,303 @@
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/*
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* ALSA interface to ivtv PCM capture streams
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*
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* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
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* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
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*
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* Portions of this work were sponsored by ONELAN Limited for the cx18 driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <media/v4l2-device.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include "ivtv-driver.h"
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#include "ivtv-version.h"
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#include "ivtv-alsa.h"
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#include "ivtv-alsa-mixer.h"
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#include "ivtv-alsa-pcm.h"
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int ivtv_alsa_debug;
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#define IVTV_DEBUG_ALSA_INFO(fmt, arg...) \
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do { \
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if (ivtv_alsa_debug & 2) \
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pr_info("%s: " fmt, "ivtv-alsa", ## arg); \
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} while (0)
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module_param_named(debug, ivtv_alsa_debug, int, 0644);
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MODULE_PARM_DESC(debug,
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"Debug level (bitmask). Default: 0\n"
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"\t\t\t 1/0x0001: warning\n"
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"\t\t\t 2/0x0002: info\n");
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MODULE_AUTHOR("Andy Walls");
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MODULE_DESCRIPTION("CX23415/CX23416 ALSA Interface");
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MODULE_SUPPORTED_DEVICE("CX23415/CX23416 MPEG2 encoder");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(IVTV_VERSION);
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static inline
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struct snd_ivtv_card *to_snd_ivtv_card(struct v4l2_device *v4l2_dev)
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{
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return to_ivtv(v4l2_dev)->alsa;
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}
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static inline
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struct snd_ivtv_card *p_to_snd_ivtv_card(struct v4l2_device **v4l2_dev)
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{
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return container_of(v4l2_dev, struct snd_ivtv_card, v4l2_dev);
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}
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static void snd_ivtv_card_free(struct snd_ivtv_card *itvsc)
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{
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if (itvsc == NULL)
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return;
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if (itvsc->v4l2_dev != NULL)
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to_ivtv(itvsc->v4l2_dev)->alsa = NULL;
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/* FIXME - take any other stopping actions needed */
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kfree(itvsc);
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}
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static void snd_ivtv_card_private_free(struct snd_card *sc)
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{
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if (sc == NULL)
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return;
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snd_ivtv_card_free(sc->private_data);
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sc->private_data = NULL;
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sc->private_free = NULL;
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}
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static int snd_ivtv_card_create(struct v4l2_device *v4l2_dev,
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struct snd_card *sc,
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struct snd_ivtv_card **itvsc)
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{
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*itvsc = kzalloc(sizeof(struct snd_ivtv_card), GFP_KERNEL);
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if (*itvsc == NULL)
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return -ENOMEM;
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(*itvsc)->v4l2_dev = v4l2_dev;
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(*itvsc)->sc = sc;
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sc->private_data = *itvsc;
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sc->private_free = snd_ivtv_card_private_free;
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return 0;
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}
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static int snd_ivtv_card_set_names(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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struct snd_card *sc = itvsc->sc;
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/* sc->driver is used by alsa-lib's configurator: simple, unique */
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strlcpy(sc->driver, "CX2341[56]", sizeof(sc->driver));
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/* sc->shortname is a symlink in /proc/asound: IVTV-M -> cardN */
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snprintf(sc->shortname, sizeof(sc->shortname), "IVTV-%d",
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itv->instance);
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/* sc->longname is read from /proc/asound/cards */
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snprintf(sc->longname, sizeof(sc->longname),
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"CX2341[56] #%d %s TV/FM Radio/Line-In Capture",
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itv->instance, itv->card_name);
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return 0;
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}
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static int snd_ivtv_init(struct v4l2_device *v4l2_dev)
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{
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struct ivtv *itv = to_ivtv(v4l2_dev);
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struct snd_card *sc = NULL;
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struct snd_ivtv_card *itvsc;
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int ret;
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/* Numbrs steps from "Writing an ALSA Driver" by Takashi Iwai */
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/* (1) Check and increment the device index */
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/* This is a no-op for us. We'll use the itv->instance */
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/* (2) Create a card instance */
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ret = snd_card_create(SNDRV_DEFAULT_IDX1, /* use first available id */
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SNDRV_DEFAULT_STR1, /* xid from end of shortname*/
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THIS_MODULE, 0, &sc);
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if (ret) {
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IVTV_ALSA_ERR("%s: snd_card_create() failed with err %d\n",
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__func__, ret);
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goto err_exit;
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}
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/* (3) Create a main component */
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ret = snd_ivtv_card_create(v4l2_dev, sc, &itvsc);
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if (ret) {
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IVTV_ALSA_ERR("%s: snd_ivtv_card_create() failed with err %d\n",
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__func__, ret);
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goto err_exit_free;
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}
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/* (4) Set the driver ID and name strings */
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snd_ivtv_card_set_names(itvsc);
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/* (5) Create other components: mixer, PCM, & proc files */
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#if 0
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ret = snd_ivtv_mixer_create(itvsc);
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if (ret) {
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IVTV_ALSA_WARN("%s: snd_ivtv_mixer_create() failed with err %d:"
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" proceeding anyway\n", __func__, ret);
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}
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#endif
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ret = snd_ivtv_pcm_create(itvsc);
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if (ret) {
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IVTV_ALSA_ERR("%s: snd_ivtv_pcm_create() failed with err %d\n",
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__func__, ret);
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goto err_exit_free;
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}
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/* FIXME - proc files */
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/* (7) Set the driver data and return 0 */
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/* We do this out of normal order for PCI drivers to avoid races */
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itv->alsa = itvsc;
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/* (6) Register the card instance */
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ret = snd_card_register(sc);
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if (ret) {
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itv->alsa = NULL;
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IVTV_ALSA_ERR("%s: snd_card_register() failed with err %d\n",
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__func__, ret);
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goto err_exit_free;
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}
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return 0;
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err_exit_free:
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if (sc != NULL)
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snd_card_free(sc);
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kfree(itvsc);
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err_exit:
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return ret;
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}
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int ivtv_alsa_load(struct ivtv *itv)
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{
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struct v4l2_device *v4l2_dev = &itv->v4l2_dev;
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struct ivtv_stream *s;
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if (v4l2_dev == NULL) {
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pr_err("ivtv-alsa: %s: struct v4l2_device * is NULL\n",
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__func__);
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return 0;
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}
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itv = to_ivtv(v4l2_dev);
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if (itv == NULL) {
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pr_err("ivtv-alsa itv is NULL\n");
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return 0;
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}
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s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
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if (s->vdev == NULL) {
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IVTV_DEBUG_ALSA_INFO("%s: PCM stream for card is disabled - "
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"skipping\n", __func__);
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return 0;
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}
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if (itv->alsa != NULL) {
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IVTV_ALSA_ERR("%s: struct snd_ivtv_card * already exists\n",
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__func__);
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return 0;
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}
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if (snd_ivtv_init(v4l2_dev)) {
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IVTV_ALSA_ERR("%s: failed to create struct snd_ivtv_card\n",
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__func__);
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} else {
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IVTV_DEBUG_ALSA_INFO("%s: created ivtv ALSA interface instance "
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"\n", __func__);
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}
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return 0;
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}
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static int __init ivtv_alsa_init(void)
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{
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pr_info("ivtv-alsa: module loading...\n");
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ivtv_ext_init = &ivtv_alsa_load;
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return 0;
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}
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static void __exit snd_ivtv_exit(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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/* FIXME - pointer checks & shutdown itvsc */
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snd_card_free(itvsc->sc);
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itv->alsa = NULL;
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}
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static int __exit ivtv_alsa_exit_callback(struct device *dev, void *data)
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{
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struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
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struct snd_ivtv_card *itvsc;
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if (v4l2_dev == NULL) {
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pr_err("ivtv-alsa: %s: struct v4l2_device * is NULL\n",
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__func__);
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return 0;
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}
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itvsc = to_snd_ivtv_card(v4l2_dev);
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if (itvsc == NULL) {
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IVTV_ALSA_WARN("%s: struct snd_ivtv_card * is NULL\n",
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__func__);
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return 0;
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}
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snd_ivtv_exit(itvsc);
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return 0;
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}
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static void __exit ivtv_alsa_exit(void)
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{
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struct device_driver *drv;
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int ret;
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pr_info("ivtv-alsa: module unloading...\n");
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drv = driver_find("ivtv", &pci_bus_type);
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ret = driver_for_each_device(drv, NULL, NULL, ivtv_alsa_exit_callback);
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(void)ret; /* suppress compiler warning */
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ivtv_ext_init = NULL;
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pr_info("ivtv-alsa: module unload complete\n");
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}
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module_init(ivtv_alsa_init);
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module_exit(ivtv_alsa_exit);
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@ -0,0 +1,175 @@
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/*
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* ALSA mixer controls for the
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* ALSA interface to ivtv PCM capture streams
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*
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* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, write to the Free Software
|
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/tlv.h>
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#include "ivtv-alsa.h"
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#include "ivtv-driver.h"
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/*
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* Note the cx25840-core volume scale is funny, due to the alignment of the
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* scale with another chip's range:
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*
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* v4l2_control value /512 indicated dB actual dB reg 0x8d4
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* 0x0000 - 0x01ff 0 -119 -96 228
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* 0x0200 - 0x02ff 1 -118 -96 228
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* ...
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* 0x2c00 - 0x2dff 22 -97 -96 228
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* 0x2e00 - 0x2fff 23 -96 -96 228
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* 0x3000 - 0x31ff 24 -95 -95 226
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* ...
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* 0xee00 - 0xefff 119 0 0 36
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* ...
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* 0xfe00 - 0xffff 127 +8 +8 20
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*/
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static inline int dB_to_cx25840_vol(int dB)
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{
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if (dB < -96)
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dB = -96;
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else if (dB > 8)
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dB = 8;
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return (dB + 119) << 9;
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}
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static inline int cx25840_vol_to_dB(int v)
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{
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if (v < (23 << 9))
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v = (23 << 9);
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else if (v > (127 << 9))
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v = (127 << 9);
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return (v >> 9) - 119;
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}
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static int snd_ivtv_mixer_tv_vol_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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/* We're already translating values, just keep this control in dB */
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uinfo->value.integer.min = -96;
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uinfo->value.integer.max = 8;
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uinfo->value.integer.step = 1;
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return 0;
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}
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static int snd_ivtv_mixer_tv_vol_get(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *uctl)
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{
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struct snd_ivtv_card *itvsc = snd_kcontrol_chip(kctl);
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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struct v4l2_control vctrl;
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int ret;
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vctrl.id = V4L2_CID_AUDIO_VOLUME;
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vctrl.value = dB_to_cx25840_vol(uctl->value.integer.value[0]);
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snd_ivtv_lock(itvsc);
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ret = v4l2_subdev_call(itv->sd_audio, core, g_ctrl, &vctrl);
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snd_ivtv_unlock(itvsc);
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if (!ret)
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uctl->value.integer.value[0] = cx25840_vol_to_dB(vctrl.value);
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return ret;
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}
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static int snd_ivtv_mixer_tv_vol_put(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *uctl)
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{
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struct snd_ivtv_card *itvsc = snd_kcontrol_chip(kctl);
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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;
|
||||
}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
/*
|
||||
* 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);
|
||||
|
|
@ -0,0 +1,357 @@
|
|||
/*
|
||||
* 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;
|
||||
}
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
/*
|
||||
* 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);
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
/*
|
||||
* 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)
|
||||
|
|
@ -68,6 +68,10 @@
|
|||
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,
|
||||
|
|
@ -279,6 +283,34 @@ MODULE_LICENSE("GPL");
|
|||
|
||||
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;
|
||||
|
|
@ -1253,6 +1285,9 @@ static int __devinit ivtv_probe(struct pci_dev *pdev,
|
|||
goto free_streams;
|
||||
}
|
||||
IVTV_INFO("Initialized card: %s\n", itv->card_name);
|
||||
|
||||
/* Load ivtv submodules (ivtv-alsa) */
|
||||
request_modules(itv);
|
||||
return 0;
|
||||
|
||||
free_streams:
|
||||
|
|
@ -1380,6 +1415,8 @@ static void ivtv_remove(struct pci_dev *pdev)
|
|||
|
||||
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");
|
||||
|
|
|
|||
|
|
@ -669,6 +669,13 @@ struct ivtv {
|
|||
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 */
|
||||
|
|
@ -752,6 +759,9 @@ static inline struct ivtv *to_ivtv(struct v4l2_device *v4l2_dev)
|
|||
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;
|
||||
|
||||
|
|
|
|||
|
|
@ -41,7 +41,7 @@
|
|||
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];
|
||||
|
|
@ -96,6 +96,7 @@ static int ivtv_claim_stream(struct ivtv_open_id *id, int 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. */
|
||||
|
|
@ -146,6 +147,7 @@ void ivtv_release_stream(struct ivtv_stream *s)
|
|||
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)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -37,8 +37,8 @@ void ivtv_mute(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
|
||||
|
|
|
|||
|
|
@ -629,6 +629,7 @@ int ivtv_start_v4l2_encode_stream(struct ivtv_stream *s)
|
|||
atomic_inc(&itv->capturing);
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(ivtv_start_v4l2_encode_stream);
|
||||
|
||||
static int ivtv_setup_v4l2_decode_stream(struct ivtv_stream *s)
|
||||
{
|
||||
|
|
@ -885,6 +886,7 @@ int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end)
|
|||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(ivtv_stop_v4l2_encode_stream);
|
||||
|
||||
int ivtv_stop_v4l2_decode_stream(struct ivtv_stream *s, int flags, u64 pts)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue