Commit 9722c8f9 authored by Andy Walls's avatar Andy Walls Committed by Mauro Carvalho Chehab

V4L/DVB: cx18-alsa: Initial non-working cx18-alsa files

Initial cx18-alsa module files check-in to avoid losing work.
Signed-off-by: default avatarAndy Walls <awalls@radix.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5eb3291f
/*
* ALSA mixer controls for the
* 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
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include "cx18-alsa.h"
#include "cx18-driver.h"
/*
* Mixer manipulations are like v4l2 ioctl() calls to manipulate controls,
* just use the same lock we use for ioctl()s for now
*/
static inline void snd_cx18_mixer_lock(struct snd_cx18_card *cxsc)
{
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
mutex_lock(&cx->serialize_lock);
}
static inline void snd_cx18_mixer_unlock(struct snd_cx18_card *cxsc)
{
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
mutex_unlock(&cx->serialize_lock);
}
/*
* Note the cx18-av-core volume scale is funny, due to the alignment of the
* scale with another chip's range:
*
* v4l2_control value /512 indicated dB actual dB reg 0x8d4
* 0x0000 - 0x01ff 0 -119 -96 228
* 0x0200 - 0x02ff 1 -118 -96 228
* ...
* 0x2c00 - 0x2dff 22 -97 -96 228
* 0x2e00 - 0x2fff 23 -96 -96 228
* 0x3000 - 0x31ff 24 -95 -95 226
* ...
* 0xee00 - 0xefff 119 0 0 36
* ...
* 0xfe00 - 0xffff 127 +8 +8 20
*/
static inline int dB_to_cx18_av_vol(int dB)
{
if (dB < -96)
dB = -96;
else if (dB > 8)
dB = 8;
return (dB + 119) << 9;
}
static inline int cx18_av_vol_to_dB(int v)
{
if (v < (23 << 9))
v = (23 << 9);
else if (v > (127 << 9))
v = (127 << 9);
return (v >> 9) - 119;
}
static int snd_cx18_mixer_tv_vol_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
/* We're already translating values, just keep this control in dB */
uinfo->value.integer.min = -96;
uinfo->value.integer.max = +8;
uinfo->value.integer.step = 1;
return 0;
}
static int snd_cx18_mixer_tv_vol_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl);
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
struct v4l2_control vctrl;
int ret;
vctrl.id = V4L2_CID_AUDIO_VOLUME;
vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
snd_cx18_mixer_lock(cxsc);
ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
snd_cx18_mixer_unlock(cxsc);
if (!ret)
uctl->value.integer.value[0] = cx18_av_vol_to_dB(vctrl.value);
return ret;
}
static int snd_cx18_mixer_tv_vol_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_cx18_card *cxsc = snd_kcontrol_chip(kctl);
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
struct v4l2_control vctrl;
int ret;
vctrl.id = V4L2_CID_AUDIO_VOLUME;
vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
snd_cx18_mixer_lock(cxsc);
/* Fetch current state */
ret = v4l2_subdev_call(cx->sd_av, core, g_ctrl, &vctrl);
if (ret ||
(cx18_av_vol_to_dB(vctrl.value) != uctl->value.integer.value[0])) {
/* Set, if needed */
vctrl.value = dB_to_cx18_av_vol(uctl->value.integer.value[0]);
ret = v4l2_subdev_call(cx->sd_av, core, s_ctrl, &vctrl);
if (!ret)
ret = 1; /* Indicate control was changed w/o error */
}
snd_cx18_mixer_unlock(cxsc);
return ret;
}
/* This is a bit of overkill, the slider is already in dB internally */
static DECLARE_TLV_DB_SCALE(snd_cx18_mixer_tv_vol_db_scale, -9600, 100, 0);
static struct snd_kcontrol_new snd_cx18_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_cx18_mixer_tv_volume_info,
.get = snd_cx18_mixer_tv_volume_get,
.put = snd_cx18_mixer_tv_volume_put,
.tlv.p = snd_cx18_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 CS5345 I2S volume for HVR-1600 */
int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc)
{
struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
struct snd_card *sc = cxsc->sc;
int ret;
strlcpy(sc->mixername, "CX23418 Mixer", sizeof(sc->mixername));
ret = snd_ctl_add(sc, snd_ctl_new1(snd_cx18_mixer_tv_vol, cxsc));
if (ret) {
CX18_ALSA_WARN("%s: failed to add %s control, err %d\n",
__func__, snd_cx18_mixer_tv_vol.name, ret);
}
return ret;
}
/*
* ALSA mixer controls for the
* 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
*/
int __init snd_cx18_mixer_create(struct snd_cx18_card *cxsc);
/*
* 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
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <media/v4l2-device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include "cx18-driver.h"
#include "cx18-alsa-mixer.h"
#include "cx18-alsa-pcm.h"
int cx18_alsa_debug;
module_param_named(debug, cx18_alsa_debug, int, 0644);
MODULE_PARM_DESC(debug,
"Debug level (bitmask). Default: 0\n"
"\t\t\t 1/0x0001: warning\n"
"\t\t\t 2/0x0002: info\n");
MODULE_AUTHOR("Andy Walls");
MODULE_DESCRIPTION("CX23418 ALSA Interface");
MODULE_SUPPORTED_DEVICE("CX23418 MPEG2 encoder");
MODULE_LICENSE("GPL");
MODULE_VERSION(CX18_VERSION);
static inline
struct snd_cx18_card *to_snd_cx18_card(struct v4l2_device *v4l2_dev)
{
return to_cx18(v4l2_dev)->alsa;
}
static inline
struct snd_cx18_card *p_to_snd_cx18_card(struct v4l2_device **v4l2_dev)
{
return container_of(v4l2_dev, struct snd_cx18_card, v4l2_dev);
}
static void snd_cx18_card_free(struct snd_cx18_card *cxsc)
{
if (cxsc == NULL)
return;
if (cxsc->v4l2_dev != NULL)
to_cx18(cxsc->v4l2_dev)->alsa = NULL;
/* FIXME - take any other stopping actions needed */
kfree(cxsc);
}
static void snd_cx18_card_private_free(struct snd_card *sc)
{
if (sc == NULL)
return;
snd_cx18_card_free(sc->private_data);
sc->private_data = NULL;
sc->private_free = NULL;
}
static int __init snd_cx18_card_create(struct v4l2_device *v4l2_dev,
struct snd_card *sc,
struct snd_cx18_card **cxsc)
{
*cxsc = kzalloc(sizeof(struct snd_cx18_card), GFP_KERNEL);
if (*cxsc == NULL)
return -ENOMEM;
(*cxsc)->v4l2_dev = v4l2_dev;
(*cxsc)->sc = sc;
sc->private_data = *cxsc;
sc->private_free = snd_cx18_card_private_free;
return 0;
}
static int __init snd_cx18_card_set_names(struct snd_cx18_card *cxsc)
{
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
struct snd_card *sc = cxsc->sc;
/* sc->driver is used by alsa-lib's configurator: simple, unique */
strlcpy(sc->driver, "CX23418", sizeof(sc->driver));
/* sc->shortname is a symlink in /proc/asound: CX18-M -> cardN */
snprintf(sc->shortname, sizeof(sc->shortname), "CX18-%d",
cx->instance);
/* sc->longname is read from /proc/asound/cards */
snprintf(sc->longname, sizeof(sc->longname),
"CX23418 #%d %s TV/FM Radio/Line-In Capture",
cx->instance, cx->card_name);
}
static int __init snd_cx18_init(struct v4l2_device *v4l2_dev)
{
struct cx18 *cx = to_cx18(v4l2_dev);
struct snd_card *sc;
struct snd_cx18_card *cxsc;
int ret;
/* Numbrs steps from "Writing an ALSA Driver" by Takashi Iwai */
/* (1) Check and increment the device index */
/* This is a no-op for us. We'll use the cx->instance */
/* (2) Create a card instance */
ret = snd_card_create(SNDRV_DEFAULT_IDX1, /* use first available id */
SNDRV_DEFAULT_STR1, /* xid from end of shortname*/
THIS_MODULE, 0, &sc);
if (ret) {
CX18_ALSA_ERR("%s: snd_card_create() failed with err %d\n",
__func__, ret);
goto err_exit;
}
/* (3) Create a main component */
ret = snd_cx18_card_create(v4l2_dev, sc, &cxsc);
if (ret) {
CX18_ALSA_ERR("%s: snd_cx18_card_create() failed with err %d\n",
__func__, ret);
goto err_exit_free;
}
/* (4) Set the driver ID and name strings */
snd_cx18_card_set_names(cxsc);
/* (5) Create other components: mixer, PCM, & proc files */
ret = snd_cx18_mixer_create(cxsc);
if (ret) {
CX18_ALSA_WARN("%s: snd_cx18_mixer_create() failed with err %d:"
"proceeding anyway\n", __func__, ret);
}
ret = snd_cx18_pcm_create(cxsc);
if (ret) {
CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n",
__func__, ret);
goto err_exit_free;
}
/* FIXME - proc files */
/* (7) Set the driver data and return 0 */
/* We do this out of normal order for PCI drivers to avoid races */
cx->alsa = cxsc;
/* (6) Register the card instance */
ret = snd_card_register(sc);
if (ret) {
cx->alsa = NULL;
CX18_ALSA_ERR("%s: snd_card_register() failed with err %d\n",
__func__, ret);
goto err_exit_free;
}
return 0;
err_exit_free:
snd_card_free(sc);
err_exit:
return ret;
}
static int __init cx18_alsa_init_callback(struct device *dev, void *data)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
int *count = data;
struct cx18 *cx;
struct cx18_stream *s;
if (v4l2_dev == NULL) {
printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n",
__func__);
return 0;
}
cx = to_cx18(v4l2_dev);
s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
if (s->video_dev == NULL) {
CX18_DEBUG_ALSA_INFO("%s: PCM stream for card is disabled - "
"skipping\n", __func__);
return 0;
}
if (cx->alsa != NULL) {
CX18_ALSA_ERR("%s: struct snd_cx18_card * already exists\n",
__func__);
return 0;
}
if (snd_cx18_init(v4l2_dev)) {
CX18_ALSA_ERR("%s: failed to create struct snd_cx18_card\n",
__func__);
} else {
CX18_DEBUG_ALSA_INFO("%s: created cx18 ALSA interface instance "
"%d\n", __func__, *count);
(*count)++;
}
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);
/*
* 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 */
......
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