diff options
Diffstat (limited to 'core.c')
| -rw-r--r-- | core.c | 354 |
1 files changed, 150 insertions, 204 deletions
@@ -8,14 +8,12 @@ */ #include <linux/module.h> -#include <linux/platform_device.h> #include <linux/string.h> #include <sound/core.h> #include <sound/initval.h> +#include <avirt/core.h> -#include "avirt/core.h" -#include "alsa-pcm.h" -#include "utils.h" +#include "core_internal.h" MODULE_AUTHOR("JOSHANNE <james.oshannessy@fiberdyne.com.au>"); MODULE_AUTHOR("MFARRUGI <mark.farrugia@fiberdyne.com.au>"); @@ -29,162 +27,19 @@ MODULE_LICENSE("GPL v2"); #define D_ERRORK(fmt, args...) DERROR(AP_LOGNAME, fmt, ##args) #define SND_AVIRTUAL_DRIVER "snd_avirt" -#define MAX_PCM_DEVS 8 -#define MAX_AUDIOPATHS 4 -#define DEFAULT_FILE_PERMS 0644 - -/* Number of playback devices to create (max = MAX_PCM_DEVS) */ -static unsigned int playback_num; -/* Number of capture devices to create (max = MAX_PCM_DEVS) */ -static unsigned int capture_num; -/* Names per playback device */ -static char *playback_names[MAX_PCM_DEVS]; -/* Names per capture device */ -static char *capture_names[MAX_PCM_DEVS]; -/* Channels per playback device */ -static unsigned int playback_chans[MAX_PCM_DEVS]; -/* Channels per capture device */ -static unsigned int capture_chans[MAX_PCM_DEVS]; - -module_param(playback_num, int, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(playback_num, - "Number of playback devices to create (max = MAX_PCM_DEVS)"); -module_param(capture_num, int, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(capture_num, - "Number of capture devices to create (max = MAX_PCM_DEVS)"); -module_param_array(playback_names, charp, NULL, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(playback_names, "Names per playback device"); -module_param_array(capture_names, charp, NULL, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(capture_names, "Names per capture device"); -module_param_array(playback_chans, int, NULL, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(playback_chans, "Channels per playback device"); -module_param_array(capture_chans, int, NULL, DEFAULT_FILE_PERMS); -MODULE_PARM_DESC(capture_chans, "Channels per capture device"); - -static struct avirt_core { - struct snd_card *card; - struct device *dev; - struct class *avirt_class; - struct platform_device *platform_dev; -} core; + +extern struct snd_pcm_ops pcm_ops; + +static struct avirt_core core = { + .stream_count = 0, +}; struct avirt_coreinfo coreinfo = { - .version = { 0, 0, 1 }, - .pcm_buff_complete = pcm_buff_complete_cb, + .version = {0, 0, 1}, }; static LIST_HEAD(audiopath_list); -/** - * avirt_probe - Register ALSA soundcard - * @devptr: Platform driver device - * @return: 0 on success or error code otherwise - */ -static int avirt_probe(struct platform_device *devptr) -{ - static struct snd_device_ops device_ops; - struct snd_pcm **pcm; - int err = 0, i = 0; - - if (playback_num == 0 && capture_num == 0) { - pr_err("playback_num or capture_num must be greater than 0!\n"); - return -EINVAL; - } - - // Create the card instance - CHK_ERR_V(snd_card_new(&devptr->dev, SNDRV_DEFAULT_IDX1, "avirt", - THIS_MODULE, 0, &core.card), - "Failed to create sound card"); - - strcpy(core.card->driver, "avirt-alsa-device"); - strcpy(core.card->shortname, "avirt"); - strcpy(core.card->longname, "A virtual sound card driver for ALSA"); - - // Create new sound device - CHK_ERR_V((snd_device_new(core.card, SNDRV_DEV_LOWLEVEL, &coreinfo, - &device_ops)), - "Failed to create sound device"); - - // TEMP - if (playback_num > 0) { - coreinfo.playback.devices = playback_num; - coreinfo.playback.streams = kzalloc( - sizeof(*coreinfo.playback.streams) * playback_num, - GFP_KERNEL); - for (i = 0; i < playback_num; i++) { - pcm = &coreinfo.playback.streams[i].pcm; - CHK_ERR(snd_pcm_new(core.card, playback_names[i], i, 1, - 0, pcm)); - - /** Register driver callbacks */ - snd_pcm_set_ops(*pcm, SNDRV_PCM_STREAM_PLAYBACK, - &pcm_ops); - - (*pcm)->info_flags = 0; - strcpy((*pcm)->name, playback_names[i]); - coreinfo.playback.streams[i].channels = - playback_chans[i]; - pr_info("snd_pcm_new: name: %s, chans: %d\n", - (*pcm)->name, - coreinfo.playback.streams[i].channels); - } - } - - if (capture_num > 0) { - coreinfo.capture.devices = capture_num; - coreinfo.capture.streams = - kzalloc(sizeof(*coreinfo.capture.streams) * capture_num, - GFP_KERNEL); - for (i = 0; i < capture_num; i++) { - pcm = &coreinfo.capture.streams[i].pcm; - CHK_ERR(snd_pcm_new(core.card, capture_names[i], - i + playback_num, 0, 1, pcm)); - - /** Register driver callbacks */ - snd_pcm_set_ops(*pcm, SNDRV_PCM_STREAM_CAPTURE, - &pcm_ops); - - (*pcm)->info_flags = 0; - strcpy((*pcm)->name, capture_names[i]); - coreinfo.capture.streams[i].channels = capture_chans[i]; - pr_info("snd_pcm_new: name: %s, chans: %d\n", - (*pcm)->name, - coreinfo.capture.streams[i].channels); - } - } - // TEMP - - /** Register with the ALSA framework */ - CHK_ERR_V(snd_card_register(core.card), "Device registration failed"); - - return err; -} - -/** - * avirt_remove - Deregister ALSA soundcard - * @devptr: Platform driver device - * @return: 0 on success or error code otherwise - */ -static int avirt_remove(struct platform_device *devptr) -{ - snd_card_free(core.card); - if (coreinfo.playback.streams) - kfree(coreinfo.playback.streams); - if (coreinfo.capture.streams) - kfree(coreinfo.capture.streams); - - return 0; -} - -static struct platform_driver avirt_driver = { - .probe = avirt_probe, - .remove = avirt_remove, - .driver = - { - .name = SND_AVIRTUAL_DRIVER, - }, -}; - struct avirt_audiopath_obj { struct kobject kobj; struct list_head list; @@ -195,7 +50,7 @@ static struct kset *avirt_audiopath_kset; static struct kobject *kobj; #define to_audiopath_obj(d) container_of(d, struct avirt_audiopath_obj, kobj) -#define to_audiopath_attr(a) \ +#define to_audiopath_attr(a) \ container_of(a, struct avirt_audiopath_attribute, attr) /** @@ -350,8 +205,10 @@ static void destroy_avirt_audiopath_obj(struct avirt_audiopath_obj *p) struct avirt_audiopath *avirt_audiopath_get(const char *uid) { struct avirt_audiopath_obj *ap_obj; - list_for_each_entry (ap_obj, &audiopath_list, list) { - pr_info("get_ap %s\n", ap_obj->path->uid); + + list_for_each_entry(ap_obj, &audiopath_list, list) + { + // pr_info("get_ap %s\n", ap_obj->path->uid); if (!strcmp(ap_obj->path->uid, uid)) return ap_obj->path; } @@ -424,12 +281,121 @@ int avirt_audiopath_deregister(struct avirt_audiopath *audiopath) EXPORT_SYMBOL_GPL(avirt_audiopath_deregister); /** - * avirt_unregister_all - Unregister the platform device driver + * avirt_stream_count - get the stream count for the given direction + * @direction: The direction to get the stream count for + * @return: The stream count */ -static void avirt_unregister_all(void) +int avirt_stream_count(unsigned int direction) { - platform_device_unregister(core.platform_dev); - platform_driver_unregister(&avirt_driver); + struct list_head *entry; + struct config_item *item; + struct avirt_stream *stream; + unsigned int count = 0; + + if (direction > 1) + return -ERANGE; + + list_for_each(entry, &core.stream_group->cg_children) + { + item = container_of(entry, struct config_item, ci_entry); + stream = avirt_stream_from_config_item(item); + if (!stream) + return -EFAULT; + if (stream->direction == direction) + count++; + } + + return count; +} +EXPORT_SYMBOL_GPL(avirt_stream_count); + +/** + * __avirt_stream_create - Create audio stream, including it's ALSA PCM device + * @name: The name designated to the audio stream + * @direction: The PCM direction (SNDRV_PCM_STREAM_PLAYBACK or + * SNDRV_PCM_STREAM_CAPTURE) + * @return: The newly created audio stream if successful, or an error pointer + */ +struct avirt_stream *__avirt_stream_create(const char *name, int direction) +{ + struct snd_pcm *pcm; + struct avirt_stream *stream; + int err; + + stream = kzalloc(sizeof(*stream), GFP_KERNEL); + if (!stream) + return ERR_PTR(-ENOMEM); + + strcpy(stream->name, name); + strcpy(stream->map, "ap_fddsp"); + stream->channels = 0; + stream->direction = direction; + stream->device = core.stream_count++; + + err = snd_pcm_new(core.card, name, stream->device, !direction, + direction, &pcm); + if (err < 0) + return ERR_PTR(err); + + // TD MF: IMPORTANT: NEED TO TEST >8 PCM DEVICES ON A + // CARD! + /** Register driver callbacks */ + snd_pcm_set_ops(pcm, direction, &pcm_ops); + + pcm->info_flags = 0; + strcpy(pcm->name, name); + + pr_info("%s [ARGS] name: %s device:%d\n", __func__, name, + stream->device); + + // coreinfo.streams[stream_idx] = stream; + + return stream; +} + +int __avirt_card_register(void) +{ + int err = 0; + + struct avirt_audiopath_obj *ap_obj; + list_for_each_entry(ap_obj, &audiopath_list, list) + { + pr_info("Calling configure for AP uid: %s\n", + ap_obj->path->uid); + ap_obj->path->configure(core.stream_group, core.stream_count); + } + + err = snd_card_register(core.card); + if (err < 0) { + pr_err("Sound card registration failed!"); + snd_card_free(core.card); + } + + return err; +} + +struct avirt_stream *__avirt_stream_find_by_device(unsigned int device) +{ + struct avirt_stream *stream; + struct config_item *item; + struct list_head *entry; + + if (device >= core.stream_count) { + pr_err("Stream device number is greater than number streams available\n"); + return ERR_PTR(-EINVAL); + } + + list_for_each(entry, &core.stream_group->cg_children) + { + item = container_of(entry, struct config_item, ci_entry); + stream = avirt_stream_from_config_item(item); + if (!stream) + return ERR_PTR(-EFAULT); + if (stream->device == device) + return stream; + } + + return NULL; } /** @@ -442,23 +408,10 @@ static int __init core_init(void) D_INFOK("Alsa Virtual Sound Driver avirt-%d.%d.%d", coreinfo.version[0], coreinfo.version[1], coreinfo.version[2]); - err = platform_driver_register(&avirt_driver); - if (err < 0) - return err; - - core.platform_dev = platform_device_register_simple(SND_AVIRTUAL_DRIVER, - 0, NULL, 0); - if (IS_ERR(core.platform_dev)) { - err = PTR_ERR(core.platform_dev); - pr_err("platform_dev error [%d]!\n", err); - goto exit_platform_device; - } - core.avirt_class = class_create(THIS_MODULE, SND_AVIRTUAL_DRIVER); if (IS_ERR(core.avirt_class)) { pr_err("No udev support\n"); - err = PTR_ERR(core.avirt_class); - goto exit_bus; + return PTR_ERR(core.avirt_class); } core.dev = device_create(core.avirt_class, NULL, 0, NULL, "avirtcore"); @@ -467,22 +420,38 @@ static int __init core_init(void) goto exit_class; } + // Create the card instance + err = snd_card_new(core.dev, SNDRV_DEFAULT_IDX1, "avirt", THIS_MODULE, + 0, &core.card); + if (err < 0) { + pr_err("Failed to create sound card"); + goto exit_class_container; + } + + strcpy(core.card->driver, "avirt-alsa-device"); + strcpy(core.card->shortname, "avirt"); + strcpy(core.card->longname, "A virtual sound card driver for ALSA"); + avirt_audiopath_kset = kset_create_and_add("audiopaths", NULL, &core.dev->kobj); if (!avirt_audiopath_kset) { err = -ENOMEM; - goto exit_class_container; + goto exit_snd_card; } + err = __avirt_configfs_init(&core); + if (err < 0) + goto exit_snd_card; + return 0; +exit_snd_card: + snd_card_free(core.card); exit_class_container: device_destroy(core.avirt_class, 0); exit_class: class_destroy(core.avirt_class); -exit_bus: -exit_platform_device: - avirt_unregister_all(); + return err; } @@ -491,34 +460,11 @@ exit_platform_device: */ static void __exit core_exit(void) { + __avirt_configfs_exit(&core); + kset_unregister(avirt_audiopath_kset); device_destroy(core.avirt_class, 0); class_destroy(core.avirt_class); - - avirt_unregister_all(); - D_INFOK("Exit begin!"); - pr_info("playback_num: %d, capture_num: %d\n", playback_num, - capture_num); - - pr_info("playback_chans: %d %d %d %d %d %d %d %d\n", playback_chans[0], - playback_chans[1], playback_chans[2], playback_chans[3], - playback_chans[4], playback_chans[5], playback_chans[6], - playback_chans[7]); - - pr_info("capture_chans: %d %d %d %d %d %d %d %d\n", capture_chans[0], - capture_chans[1], capture_chans[2], capture_chans[3], - capture_chans[4], capture_chans[5], capture_chans[6], - capture_chans[7]); - - pr_info("playback_names: %s %s %s %s %s %s %s %s\n", playback_names[0], - playback_names[1], playback_names[2], playback_names[3], - playback_names[4], playback_names[5], playback_names[6], - playback_names[7]); - - pr_info("capture_names: %s %s %s %s %s %s %s %s\n", capture_names[0], - capture_names[1], capture_names[2], capture_names[3], - capture_names[4], capture_names[5], capture_names[6], - capture_names[7]); } module_init(core_init); |