--- /dev/null
+/*
+ * 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);
+++ /dev/null
-/*
- * 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);
projects / mirror_ubuntu-disco-kernel.git / commitdiff