V4L/DVB: cx18-alsa: Initial non-working cx18-alsa files
Initial cx18-alsa module files check-in to avoid losing work. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls
Mauro Carvalho Chehab
parent
5eb3291fe8
commit
9722c8f95a
191
drivers/media/video/cx18/cx18-alsa-mixer.c
Normal file
191
drivers/media/video/cx18/cx18-alsa-mixer.c
Normal file
@ -0,0 +1,191 @@
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/*
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* ALSA mixer controls for the
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* ALSA interface to cx18 PCM capture streams
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*
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* Copyright (C) 2009 Andy Walls <awalls@radix.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 "cx18-alsa.h"
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#include "cx18-driver.h"
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/*
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* Mixer manipulations are like v4l2 ioctl() calls to manipulate controls,
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* just use the same lock we use for ioctl()s for now
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*/
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static inline void snd_cx18_mixer_lock(struct snd_cx18_card *cxsc)
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{
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struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
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mutex_lock(&cx->serialize_lock);
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}
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static inline void snd_cx18_mixer_unlock(struct snd_cx18_card *cxsc)
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{
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struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
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mutex_unlock(&cx->serialize_lock);
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}
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/*
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* Note the cx18-av-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_cx18_av_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 cx18_av_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_cx18_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_cx18_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_cx18_card *cxsc = snd_kcontrol_chip(kctl);
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struct cx18 *cx = to_cx18(cxsc->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_cx18_av_vol(uctl->value.integer.value[0]);
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snd_cx18_mixer_lock(cxsc);
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ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
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snd_cx18_mixer_unlock(cxsc);
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if (!ret)
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uctl->value.integer.value[0] = cx18_av_vol_to_dB(vctrl.value);
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return ret;
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}
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static int snd_cx18_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_cx18_card *cxsc = snd_kcontrol_chip(kctl);
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struct cx18 *cx = to_cx18(cxsc->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_cx18_av_vol(uctl->value.integer.value[0]);
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snd_cx18_mixer_lock(cxsc);
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/* Fetch current state */
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ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
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if (ret ||
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(cx18_av_vol_to_dB(vctrl.value) != uctl->value.integer.value[0])) {
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/* Set, if needed */
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vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
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ret = v4l2_subdev_call(cx->sd_av, core, s_ctrl, &vctrl);
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if (!ret)
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ret = 1; /* Indicate control was changed w/o error */
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}
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snd_cx18_mixer_unlock(cxsc);
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return ret;
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}
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/* This is a bit of overkill, the slider is already in dB internally */
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static DECLARE_TLV_DB_SCALE(snd_cx18_mixer_tv_vol_db_scale, -9600, 100, 0);
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static struct snd_kcontrol_new snd_cx18_mixer_tv_vol __initdata = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Analog TV Capture Volume",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
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SNDRV_CTL_ELEM_ACCESS_TLV_READ,
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.info = snd_cx18_mixer_tv_volume_info,
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.get = snd_cx18_mixer_tv_volume_get,
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.put = snd_cx18_mixer_tv_volume_put,
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.tlv.p = snd_cx18_mixer_tv_vol_db_scale
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};
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/* FIXME - add mute switch and balance, bass, treble sliders:
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V4L2_CID_AUDIO_MUTE
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V4L2_CID_AUDIO_BALANCE
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V4L2_CID_AUDIO_BASS
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V4L2_CID_AUDIO_TREBLE
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*/
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/* FIXME - add stereo, lang1, lang2, mono menu */
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/* FIXME - add CS5345 I2S volume for HVR-1600 */
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int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc)
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{
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struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
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struct snd_card *sc = cxsc->sc;
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int ret;
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strlcpy(sc->mixername, "CX23418 Mixer", sizeof(sc->mixername));
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ret = snd_ctl_add(sc, snd_ctl_new1(snd_cx18_mixer_tv_vol, cxsc));
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if (ret) {
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CX18_ALSA_WARN("%s: failed to add %s control, err %d\n",
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__func__, snd_cx18_mixer_tv_vol.name, ret);
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}
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return ret;
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}
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23
drivers/media/video/cx18/cx18-alsa-mixer.h
Normal file
23
drivers/media/video/cx18/cx18-alsa-mixer.h
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@ -0,0 +1,23 @@
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/*
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* ALSA mixer controls for the
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* ALSA interface to cx18 PCM capture streams
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*
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* Copyright (C) 2009 Andy Walls <awalls@radix.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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int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc);
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303
drivers/media/video/cx18/cx18-alsa.c
Normal file
303
drivers/media/video/cx18/cx18-alsa.c
Normal file
@ -0,0 +1,303 @@
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/*
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* ALSA interface to cx18 PCM capture streams
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*
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* Copyright (C) 2009 Andy Walls <awalls@radix.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/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 "cx18-driver.h"
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#include "cx18-alsa-mixer.h"
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#include "cx18-alsa-pcm.h"
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int cx18_alsa_debug;
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module_param_named(debug, cx18_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("CX23418 ALSA Interface");
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MODULE_SUPPORTED_DEVICE("CX23418 MPEG2 encoder");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(CX18_VERSION);
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static inline
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struct snd_cx18_card *to_snd_cx18_card(struct v4l2_device *v4l2_dev)
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{
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return to_cx18(v4l2_dev)->alsa;
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}
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static inline
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struct snd_cx18_card *p_to_snd_cx18_card(struct v4l2_device **v4l2_dev)
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{
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return container_of(v4l2_dev, struct snd_cx18_card, v4l2_dev);
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}
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static void snd_cx18_card_free(struct snd_cx18_card *cxsc)
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{
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if (cxsc == NULL)
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return;
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if (cxsc->v4l2_dev != NULL)
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to_cx18(cxsc->v4l2_dev)->alsa = NULL;
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/* FIXME - take any other stopping actions needed */
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kfree(cxsc);
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}
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static void snd_cx18_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_cx18_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 __init snd_cx18_card_create(struct v4l2_device *v4l2_dev,
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struct snd_card *sc,
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struct snd_cx18_card **cxsc)
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{
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*cxsc = kzalloc(sizeof(struct snd_cx18_card), GFP_KERNEL);
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if (*cxsc == NULL)
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return -ENOMEM;
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(*cxsc)->v4l2_dev = v4l2_dev;
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(*cxsc)->sc = sc;
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sc->private_data = *cxsc;
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sc->private_free = snd_cx18_card_private_free;
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return 0;
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}
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static int __init snd_cx18_card_set_names(struct snd_cx18_card *cxsc)
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{
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struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
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struct snd_card *sc = cxsc->sc;
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/* sc->driver is used by alsa-lib's configurator: simple, unique */
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strlcpy(sc->driver, "CX23418", sizeof(sc->driver));
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/* sc->shortname is a symlink in /proc/asound: CX18-M -> cardN */
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snprintf(sc->shortname, sizeof(sc->shortname), "CX18-%d",
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cx->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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"CX23418 #%d %s TV/FM Radio/Line-In Capture",
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cx->instance, cx->card_name);
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}
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static int __init snd_cx18_init(struct v4l2_device *v4l2_dev)
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{
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struct cx18 *cx = to_cx18(v4l2_dev);
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struct snd_card *sc;
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struct snd_cx18_card *cxsc;
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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 cx->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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CX18_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_cx18_card_create(v4l2_dev, sc, &cxsc);
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if (ret) {
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CX18_ALSA_ERR("%s: snd_cx18_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_cx18_card_set_names(cxsc);
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/* (5) Create other components: mixer, PCM, & proc files */
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ret = snd_cx18_mixer_create(cxsc);
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if (ret) {
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CX18_ALSA_WARN("%s: snd_cx18_mixer_create() failed with err %d:"
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"proceeding anyway\n", __func__, ret);
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}
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ret = snd_cx18_pcm_create(cxsc);
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if (ret) {
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CX18_ALSA_ERR("%s: snd_cx18_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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cx->alsa = cxsc;
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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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cx->alsa = NULL;
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CX18_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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snd_card_free(sc);
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err_exit:
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return ret;
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}
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static int __init cx18_alsa_init_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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int *count = data;
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struct cx18 *cx;
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struct cx18_stream *s;
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if (v4l2_dev == NULL) {
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printk(KERN_ERR "cx18-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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cx = to_cx18(v4l2_dev);
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s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
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if (s->video_dev == NULL) {
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CX18_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 (cx->alsa != NULL) {
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CX18_ALSA_ERR("%s: struct snd_cx18_card * already exists\n",
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__func__);
|
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return 0;
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}
|
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|
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if (snd_cx18_init(v4l2_dev)) {
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CX18_ALSA_ERR("%s: failed to create struct snd_cx18_card\n",
|
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__func__);
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} else {
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CX18_DEBUG_ALSA_INFO("%s: created cx18 ALSA interface instance "
|
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"%d\n", __func__, *count);
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(*count)++;
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}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init cx18_alsa_init(void)
|
||||
{
|
||||
struct device_driver *drv;
|
||||
int count = 0;
|
||||
int ret;
|
||||
|
||||
printk(KERN_INFO "cx18-alsa: module loading...\n");
|
||||
|
||||
drv = driver_find("cx18", &pci_bus_type);
|
||||
ret = driver_for_each_device(drv, NULL, &count,
|
||||
cx18_alsa_init_callback);
|
||||
put_driver(drv);
|
||||
|
||||
if (count == 0) {
|
||||
printk(KERN_ERR "cx18-alsa: no cx18 cards found with a PCM "
|
||||
"capture stream allocated\n");
|
||||
ret = -ENODEV;
|
||||
} else {
|
||||
printk(KERN_INFO "cx18-alsa: ALSA interface(s) created for %d "
|
||||
"cx18 card(s)\n", count);
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
printk(KERN_INFO "cx18-alsa: module load complete\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void snd_cx18_exit(struct snd_cx18_card *cxsc)
|
||||
{
|
||||
struct cx18 *cx = to_cx18(cxsc->4l2_dev);
|
||||
|
||||
/* FIXME - pointer checks & shutdown cxsc */
|
||||
|
||||
snd_card_free(cxsc->sc);
|
||||
cx->alsa = NULL;
|
||||
}
|
||||
|
||||
static int cx18_alsa_exit_callback(struct device *dev, void *data)
|
||||
{
|
||||
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
|
||||
struct snd_cx18_card *cxsc;
|
||||
struct cx18 *cx;
|
||||
|
||||
if (v4l2_dev == NULL) {
|
||||
printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n",
|
||||
__func__);
|
||||
return 0;
|
||||
}
|
||||
|
||||
cxsc = to_snd_cx18_card(v4l2_dev);
|
||||
if (cxsc == NULL) {
|
||||
CX18_ALSA_WARN("%s: struct snd_cx18_card * is NULL\n",
|
||||
__func__);
|
||||
return 0;
|
||||
}
|
||||
|
||||
snd_cx18_exit(cxsc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cx18_alsa_exit(void)
|
||||
{
|
||||
struct device_driver *drv;
|
||||
int ret;
|
||||
|
||||
printk(KERN_INFO "cx18-alsa: module unloading...\n");
|
||||
|
||||
drv = driver_find("cx18", &pci_bus_type);
|
||||
ret = driver_for_each_device(drv, NULL, NULL, cx18_alsa_exit_callback);
|
||||
put_driver(drv);
|
||||
|
||||
printk(KERN_INFO "cx18-alsa: module unload complete\n");
|
||||
}
|
||||
|
||||
module_init(cx18_alsa_init);
|
||||
module_exit(cx18_alsa_exit);
|
||||
55
drivers/media/video/cx18/cx18-alsa.h
Normal file
55
drivers/media/video/cx18/cx18-alsa.h
Normal file
@ -0,0 +1,55 @@
|
||||
/*
|
||||
* ALSA interface to cx18 PCM capture streams
|
||||
*
|
||||
* Copyright (C) 2009 Andy Walls <awalls@radix.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
|
||||
*/
|
||||
|
||||
struct snd_card;
|
||||
|
||||
struct snd_cx18_card {
|
||||
struct v4l2_device *v4l2_dev;
|
||||
struct snd_card *sc;
|
||||
};
|
||||
|
||||
extern int cx18_alsa_debug;
|
||||
|
||||
#define CX18_ALSA_DBGFLG_WARN (1 << 0)
|
||||
#define CX18_ALSA_DBGFLG_WARN (1 << 0)
|
||||
#define CX18_ALSA_DBGFLG_INFO (1 << 1)
|
||||
|
||||
#define CX18_ALSA_DEBUG(x, type, fmt, args...) \
|
||||
do { \
|
||||
if ((x) & cx18_alsa_debug) \
|
||||
printk(KERN_INFO "%s-alsa: " type ": " fmt, \
|
||||
v4l2_dev->name , ## args); \
|
||||
} while (0)
|
||||
|
||||
#define CX18_ALSA_DEBUG_WARN(fmt, args...) \
|
||||
CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
|
||||
|
||||
#define CX18_ALSA_DEBUG_INFO(fmt, args...) \
|
||||
CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
|
||||
|
||||
#define CX18_ALSA_ERR(fmt, args...) \
|
||||
printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
|
||||
|
||||
#define CX18_ALSA_WARN(fmt, args...) \
|
||||
printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
|
||||
|
||||
#define CX18_ALSA_INFO(fmt, args...) \
|
||||
printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
|
||||
@ -574,6 +574,7 @@ struct cx18 {
|
||||
int stream_buffers[CX18_MAX_STREAMS]; /* # of buffers for each stream */
|
||||
int stream_buf_size[CX18_MAX_STREAMS]; /* Stream buffer size */
|
||||
struct cx18_stream streams[CX18_MAX_STREAMS]; /* Stream data */
|
||||
struct snd_cx18_card *alsa; /* ALSA interface for PCM capture stream */
|
||||
unsigned long i_flags; /* global cx18 flags */
|
||||
atomic_t ana_capturing; /* count number of active analog capture streams */
|
||||
atomic_t tot_capturing; /* total count number of active capture streams */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user