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linux/drivers/media/pci/cx18/cx18-alsa-main.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

292 lines
6.9 KiB
C
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/*
* ALSA interface to cx18 PCM capture streams
*
* Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
*
* Portions of this work were sponsored by ONELAN Limited.
*
* 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.
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <media/v4l2-device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include "cx18-driver.h"
#include "cx18-version.h"
#include "cx18-alsa.h"
#include "cx18-alsa-mixer.h"
#include "cx18-alsa-pcm.h"
int cx18_alsa_debug;
#define CX18_DEBUG_ALSA_INFO(fmt, arg...) \
do { \
if (cx18_alsa_debug & 2) \
printk(KERN_INFO "%s: " fmt, "cx18-alsa", ## arg); \
} while (0);
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 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 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);
return 0;
}
static int snd_cx18_init(struct v4l2_device *v4l2_dev)
{
struct cx18 *cx = to_cx18(v4l2_dev);
struct snd_card *sc = NULL;
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_new(&cx->pci_dev->dev,
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_new() 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);
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:
if (sc != NULL)
snd_card_free(sc);
kfree(cxsc);
err_exit:
return ret;
}
static int cx18_alsa_load(struct cx18 *cx)
{
struct v4l2_device *v4l2_dev = &cx->v4l2_dev;
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);
if (cx == NULL) {
printk(KERN_ERR "cx18-alsa cx is NULL\n");
return 0;
}
s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
if (s->video_dev.v4l2_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\n",
__func__);
}
return 0;
}
static int __init cx18_alsa_init(void)
{
printk(KERN_INFO "cx18-alsa: module loading...\n");
cx18_ext_init = &cx18_alsa_load;
return 0;
}
static void __exit snd_cx18_exit(struct snd_cx18_card *cxsc)
{
struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
/* FIXME - pointer checks & shutdown cxsc */
snd_card_free(cxsc->sc);
cx->alsa = NULL;
}
static int __exit cx18_alsa_exit_callback(struct device *dev, void *data)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
struct snd_cx18_card *cxsc;
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 __exit 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);
(void)ret; /* suppress compiler warning */
cx18_ext_init = NULL;
printk(KERN_INFO "cx18-alsa: module unload complete\n");
}
module_init(cx18_alsa_init);
module_exit(cx18_alsa_exit);
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