diff options
Diffstat (limited to 'recipes-kernel/aim-sound')
| -rw-r--r-- | recipes-kernel/aim-sound/aim-sound.bb | 17 | ||||
| -rw-r--r-- | recipes-kernel/aim-sound/files/COPYING | 340 | ||||
| -rw-r--r-- | recipes-kernel/aim-sound/files/Makefile | 18 | ||||
| -rw-r--r-- | recipes-kernel/aim-sound/files/sound.c | 768 |
4 files changed, 7 insertions, 1136 deletions
diff --git a/recipes-kernel/aim-sound/aim-sound.bb b/recipes-kernel/aim-sound/aim-sound.bb index 565b1a563..b51fe2362 100644 --- a/recipes-kernel/aim-sound/aim-sound.bb +++ b/recipes-kernel/aim-sound/aim-sound.bb @@ -1,21 +1,18 @@ DESCRIPTION = "Example of how to build an external Linux kernel module" LICENSE = "GPLv2" -LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e \ - file://sound.c;md5=5306a2a73f0855ecf71a8241796517a6 \ - " +LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6" +#LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e \ +# " inherit module -PR = "r0" PV = "0.1" -SRC_URI = "file://Makefile \ - file://../../mostcore/files/mostcore.h \ - file://sound.c \ - file://COPYING \ - " +SRC_URI = "git://gerrit.automotivelinux.org/gerrit/src/most;protocol=https" -S = "${WORKDIR}" +S = "${WORKDIR}/git/driver/${PN}" +SRCREV = "ad245bdd60434dd46d6461f585d49db1b3b0d75b" +#SRCREV = "${AUTOREV}" # The inherit of module.bbclass will automatically name module packages with # "kernel-module-" prefix as required by the oe-core build environment. diff --git a/recipes-kernel/aim-sound/files/COPYING b/recipes-kernel/aim-sound/files/COPYING deleted file mode 100644 index 6d45519c8..000000000 --- a/recipes-kernel/aim-sound/files/COPYING +++ /dev/null @@ -1,340 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 2, June 1991 - - Copyright (C) 1989, 1991 Free Software Foundation, Inc. - 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The licenses for most software are designed to take away your -freedom to share and change it. By contrast, the GNU General Public -License is intended to guarantee your freedom to share and change free -software--to make sure the software is free for all its users. This -General Public License applies to most of the Free Software -Foundation's software and to any other program whose authors commit to -using it. (Some other Free Software Foundation software is covered by -the GNU Library General Public License instead.) You can apply it to -your programs, too. - - When we speak of free software, we are referring to freedom, not -price. Our General Public Licenses are designed to make sure that you -have the freedom to distribute copies of free software (and charge for -this service if you wish), that you receive source code or can get it -if you want it, that you can change the software or use pieces of it -in new free programs; and that you know you can do these things. - - To protect your rights, we need to make restrictions that forbid -anyone to deny you these rights or to ask you to surrender the rights. -These restrictions translate to certain responsibilities for you if you -distribute copies of the software, or if you modify it. - - For example, if you distribute copies of such a program, whether -gratis or for a fee, you must give the recipients all the rights that -you have. You must make sure that they, too, receive or can get the -source code. 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KG - * - * 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. - * - * This file is licensed under GPLv2. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/printk.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <linux/sched.h> -#include <linux/kthread.h> -#include <mostcore.h> - -#define DRIVER_NAME "sound" - -static struct list_head dev_list; -static struct most_aim audio_aim; - -/** - * struct channel - private structure to keep channel specific data - * @substream: stores the substream structure - * @iface: interface for which the channel belongs to - * @cfg: channel configuration - * @card: registered sound card - * @list: list for private use - * @id: channel index - * @period_pos: current period position (ring buffer) - * @buffer_pos: current buffer position (ring buffer) - * @is_stream_running: identifies whether a stream is running or not - * @opened: set when the stream is opened - * @playback_task: playback thread - * @playback_waitq: waitq used by playback thread - */ -struct channel { - struct snd_pcm_substream *substream; - struct snd_pcm_hardware pcm_hardware; - struct most_interface *iface; - struct most_channel_config *cfg; - struct snd_card *card; - struct list_head list; - int id; - unsigned int period_pos; - unsigned int buffer_pos; - bool is_stream_running; - - struct task_struct *playback_task; - wait_queue_head_t playback_waitq; - - void (*copy_fn)(void *alsa, void *most, unsigned int bytes); -}; - -#define MOST_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ - SNDRV_PCM_INFO_MMAP_VALID | \ - SNDRV_PCM_INFO_BATCH | \ - SNDRV_PCM_INFO_INTERLEAVED | \ - SNDRV_PCM_INFO_BLOCK_TRANSFER) - -#define swap16(val) ( \ - (((u16)(val) << 8) & (u16)0xFF00) | \ - (((u16)(val) >> 8) & (u16)0x00FF)) - -#define swap32(val) ( \ - (((u32)(val) << 24) & (u32)0xFF000000) | \ - (((u32)(val) << 8) & (u32)0x00FF0000) | \ - (((u32)(val) >> 8) & (u32)0x0000FF00) | \ - (((u32)(val) >> 24) & (u32)0x000000FF)) - -static void swap_copy16(u16 *dest, const u16 *source, unsigned int bytes) -{ - unsigned int i = 0; - - while (i < (bytes / 2)) { - dest[i] = swap16(source[i]); - i++; - } -} - -static void swap_copy24(u8 *dest, const u8 *source, unsigned int bytes) -{ - unsigned int i = 0; - - while (i < bytes - 2) { - dest[i] = source[i + 2]; - dest[i + 1] = source[i + 1]; - dest[i + 2] = source[i]; - i += 3; - } -} - -static void swap_copy32(u32 *dest, const u32 *source, unsigned int bytes) -{ - unsigned int i = 0; - - while (i < bytes / 4) { - dest[i] = swap32(source[i]); - i++; - } -} - -static void alsa_to_most_memcpy(void *alsa, void *most, unsigned int bytes) -{ - memcpy(most, alsa, bytes); -} - -static void alsa_to_most_copy16(void *alsa, void *most, unsigned int bytes) -{ - swap_copy16(most, alsa, bytes); -} - -static void alsa_to_most_copy24(void *alsa, void *most, unsigned int bytes) -{ - swap_copy24(most, alsa, bytes); -} - -static void alsa_to_most_copy32(void *alsa, void *most, unsigned int bytes) -{ - swap_copy32(most, alsa, bytes); -} - -static void most_to_alsa_memcpy(void *alsa, void *most, unsigned int bytes) -{ - memcpy(alsa, most, bytes); -} - -static void most_to_alsa_copy16(void *alsa, void *most, unsigned int bytes) -{ - swap_copy16(alsa, most, bytes); -} - -static void most_to_alsa_copy24(void *alsa, void *most, unsigned int bytes) -{ - swap_copy24(alsa, most, bytes); -} - -static void most_to_alsa_copy32(void *alsa, void *most, unsigned int bytes) -{ - swap_copy32(alsa, most, bytes); -} - -/** - * get_channel - get pointer to channel - * @iface: interface structure - * @channel_id: channel ID - * - * This traverses the channel list and returns the channel matching the - * ID and interface. - * - * Returns pointer to channel on success or NULL otherwise. - */ -static struct channel *get_channel(struct most_interface *iface, - int channel_id) -{ - struct channel *channel, *tmp; - - list_for_each_entry_safe(channel, tmp, &dev_list, list) { - if ((channel->iface == iface) && (channel->id == channel_id)) - return channel; - } - - return NULL; -} - -/** - * copy_data - implements data copying function - * @channel: channel - * @mbo: MBO from core - * - * Copy data from/to ring buffer to/from MBO and update the buffer position - */ -static bool copy_data(struct channel *channel, struct mbo *mbo) -{ - struct snd_pcm_runtime *const runtime = channel->substream->runtime; - unsigned int const frame_bytes = channel->cfg->subbuffer_size; - unsigned int const buffer_size = runtime->buffer_size; - unsigned int frames; - unsigned int fr0; - - if (channel->cfg->direction & MOST_CH_RX) - frames = mbo->processed_length / frame_bytes; - else - frames = mbo->buffer_length / frame_bytes; - fr0 = min(buffer_size - channel->buffer_pos, frames); - - channel->copy_fn(runtime->dma_area + channel->buffer_pos * frame_bytes, - mbo->virt_address, - fr0 * frame_bytes); - - if (frames > fr0) { - /* wrap around at end of ring buffer */ - channel->copy_fn(runtime->dma_area, - mbo->virt_address + fr0 * frame_bytes, - (frames - fr0) * frame_bytes); - } - - channel->buffer_pos += frames; - if (channel->buffer_pos >= buffer_size) - channel->buffer_pos -= buffer_size; - channel->period_pos += frames; - if (channel->period_pos >= runtime->period_size) { - channel->period_pos -= runtime->period_size; - return true; - } - - return false; -} - -/** - * playback_thread - function implements the playback thread - * @data: private data - * - * Thread which does the playback functionality in a loop. It waits for a free - * MBO from mostcore for a particular channel and copy the data from ring buffer - * to MBO. Submit the MBO back to mostcore, after copying the data. - * - * Returns 0 on success or error code otherwise. - */ -static int playback_thread(void *data) -{ - struct channel *const channel = data; - - while (!kthread_should_stop()) { - struct mbo *mbo = NULL; - bool period_elapsed = false; - int ret; - - wait_event_interruptible( - channel->playback_waitq, - kthread_should_stop() || - (channel->is_stream_running && - (mbo = most_get_mbo(channel->iface, channel->id, - &audio_aim)))); - if (!mbo) - continue; - - if (channel->is_stream_running) - period_elapsed = copy_data(channel, mbo); - else - memset(mbo->virt_address, 0, mbo->buffer_length); - - ret = most_submit_mbo(mbo); - if (ret) - channel->is_stream_running = false; - - if (period_elapsed) - snd_pcm_period_elapsed(channel->substream); - } - - return 0; -} - -/** - * pcm_open - implements open callback function for PCM middle layer - * @substream: pointer to ALSA PCM substream - * - * This is called when a PCM substream is opened. At least, the function should - * initialize the runtime->hw record. - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_open(struct snd_pcm_substream *substream) -{ - struct channel *channel = substream->private_data; - struct snd_pcm_runtime *runtime = substream->runtime; - struct most_channel_config *cfg = channel->cfg; - - channel->substream = substream; - - if (cfg->direction == MOST_CH_TX) { - channel->playback_task = kthread_run(playback_thread, channel, - "most_audio_playback"); - if (IS_ERR(channel->playback_task)) { - pr_err("Couldn't start thread\n"); - return PTR_ERR(channel->playback_task); - } - } - - if (most_start_channel(channel->iface, channel->id, &audio_aim)) { - pr_err("most_start_channel() failed!\n"); - if (cfg->direction == MOST_CH_TX) - kthread_stop(channel->playback_task); - return -EBUSY; - } - - runtime->hw = channel->pcm_hardware; - return 0; -} - -/** - * pcm_close - implements close callback function for PCM middle layer - * @substream: sub-stream pointer - * - * Obviously, this is called when a PCM substream is closed. Any private - * instance for a PCM substream allocated in the open callback will be - * released here. - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_close(struct snd_pcm_substream *substream) -{ - struct channel *channel = substream->private_data; - - if (channel->cfg->direction == MOST_CH_TX) - kthread_stop(channel->playback_task); - most_stop_channel(channel->iface, channel->id, &audio_aim); - - return 0; -} - -/** - * pcm_hw_params - implements hw_params callback function for PCM middle layer - * @substream: sub-stream pointer - * @hw_params: contains the hardware parameters set by the application - * - * This is called when the hardware parameters is set by the application, that - * is, once when the buffer size, the period size, the format, etc. are defined - * for the PCM substream. Many hardware setups should be done is this callback, - * including the allocation of buffers. - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct channel *channel = substream->private_data; - - if ((params_channels(hw_params) > channel->pcm_hardware.channels_max) || - (params_channels(hw_params) < channel->pcm_hardware.channels_min)) { - pr_err("Requested number of channels not supported.\n"); - return -EINVAL; - } - return snd_pcm_lib_alloc_vmalloc_buffer(substream, - params_buffer_bytes(hw_params)); -} - -/** - * pcm_hw_free - implements hw_free callback function for PCM middle layer - * @substream: substream pointer - * - * This is called to release the resources allocated via hw_params. - * This function will be always called before the close callback is called. - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_hw_free(struct snd_pcm_substream *substream) -{ - return snd_pcm_lib_free_vmalloc_buffer(substream); -} - -/** - * pcm_prepare - implements prepare callback function for PCM middle layer - * @substream: substream pointer - * - * This callback is called when the PCM is "prepared". Format rate, sample rate, - * etc., can be set here. This callback can be called many times at each setup. - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_prepare(struct snd_pcm_substream *substream) -{ - struct channel *channel = substream->private_data; - struct snd_pcm_runtime *runtime = substream->runtime; - struct most_channel_config *cfg = channel->cfg; - int width = snd_pcm_format_physical_width(runtime->format); - - channel->copy_fn = NULL; - - if (cfg->direction == MOST_CH_TX) { - if (snd_pcm_format_big_endian(runtime->format) || width == 8) - channel->copy_fn = alsa_to_most_memcpy; - else if (width == 16) - channel->copy_fn = alsa_to_most_copy16; - else if (width == 24) - channel->copy_fn = alsa_to_most_copy24; - else if (width == 32) - channel->copy_fn = alsa_to_most_copy32; - } else { - if (snd_pcm_format_big_endian(runtime->format) || width == 8) - channel->copy_fn = most_to_alsa_memcpy; - else if (width == 16) - channel->copy_fn = most_to_alsa_copy16; - else if (width == 24) - channel->copy_fn = most_to_alsa_copy24; - else if (width == 32) - channel->copy_fn = most_to_alsa_copy32; - } - - if (!channel->copy_fn) { - pr_err("unsupported format\n"); - return -EINVAL; - } - - channel->period_pos = 0; - channel->buffer_pos = 0; - - return 0; -} - -/** - * pcm_trigger - implements trigger callback function for PCM middle layer - * @substream: substream pointer - * @cmd: action to perform - * - * This is called when the PCM is started, stopped or paused. The action will be - * specified in the second argument, SNDRV_PCM_TRIGGER_XXX - * - * Returns 0 on success or error code otherwise. - */ -static int pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct channel *channel = substream->private_data; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - channel->is_stream_running = true; - wake_up_interruptible(&channel->playback_waitq); - return 0; - - case SNDRV_PCM_TRIGGER_STOP: - channel->is_stream_running = false; - return 0; - - default: - pr_info("pcm_trigger(), invalid\n"); - return -EINVAL; - } - return 0; -} - -/** - * pcm_pointer - implements pointer callback function for PCM middle layer - * @substream: substream pointer - * - * This callback is called when the PCM middle layer inquires the current - * hardware position on the buffer. The position must be returned in frames, - * ranging from 0 to buffer_size-1. - */ -static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream) -{ - struct channel *channel = substream->private_data; - - return channel->buffer_pos; -} - -/** - * Initialization of struct snd_pcm_ops - */ -static struct snd_pcm_ops pcm_ops = { - .open = pcm_open, - .close = pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = pcm_hw_params, - .hw_free = pcm_hw_free, - .prepare = pcm_prepare, - .trigger = pcm_trigger, - .pointer = pcm_pointer, - .page = snd_pcm_lib_get_vmalloc_page, - .mmap = snd_pcm_lib_mmap_vmalloc, -}; - -static int split_arg_list(char *buf, char **card_name, char **pcm_format) -{ - *card_name = strsep(&buf, "."); - if (!*card_name) - return -EIO; - *pcm_format = strsep(&buf, ".\n"); - if (!*pcm_format) - return -EIO; - return 0; -} - -static int audio_set_hw_params(struct snd_pcm_hardware *pcm_hw, - char *pcm_format, - struct most_channel_config *cfg) -{ - pcm_hw->info = MOST_PCM_INFO; - pcm_hw->rates = SNDRV_PCM_RATE_48000; - pcm_hw->rate_min = 48000; - pcm_hw->rate_max = 48000; - pcm_hw->buffer_bytes_max = cfg->num_buffers * cfg->buffer_size; - pcm_hw->period_bytes_min = cfg->buffer_size; - pcm_hw->period_bytes_max = cfg->buffer_size; - pcm_hw->periods_min = 1; - pcm_hw->periods_max = cfg->num_buffers; - - if (!strcmp(pcm_format, "1x8")) { - if (cfg->subbuffer_size != 1) - goto error; - pr_info("PCM format is 8-bit mono\n"); - pcm_hw->channels_min = 1; - pcm_hw->channels_max = 1; - pcm_hw->formats = SNDRV_PCM_FMTBIT_S8; - } else if (!strcmp(pcm_format, "2x16")) { - if (cfg->subbuffer_size != 4) - goto error; - pr_info("PCM format is 16-bit stereo\n"); - pcm_hw->channels_min = 2; - pcm_hw->channels_max = 2; - pcm_hw->formats = SNDRV_PCM_FMTBIT_S16_LE | - SNDRV_PCM_FMTBIT_S16_BE; - } else if (!strcmp(pcm_format, "2x24")) { - if (cfg->subbuffer_size != 6) - goto error; - pr_info("PCM format is 24-bit stereo\n"); - pcm_hw->channels_min = 2; - pcm_hw->channels_max = 2; - pcm_hw->formats = SNDRV_PCM_FMTBIT_S24_3LE | - SNDRV_PCM_FMTBIT_S24_3BE; - } else if (!strcmp(pcm_format, "2x32")) { - if (cfg->subbuffer_size != 8) - goto error; - pr_info("PCM format is 32-bit stereo\n"); - pcm_hw->channels_min = 2; - pcm_hw->channels_max = 2; - pcm_hw->formats = SNDRV_PCM_FMTBIT_S32_LE | - SNDRV_PCM_FMTBIT_S32_BE; - } else if (!strcmp(pcm_format, "6x16")) { - if (cfg->subbuffer_size != 12) - goto error; - pr_info("PCM format is 16-bit 5.1 multi channel\n"); - pcm_hw->channels_min = 6; - pcm_hw->channels_max = 6; - pcm_hw->formats = SNDRV_PCM_FMTBIT_S16_LE | - SNDRV_PCM_FMTBIT_S16_BE; - } else { - pr_err("PCM format %s not supported\n", pcm_format); - return -EIO; - } - return 0; -error: - pr_err("Audio resolution doesn't fit subbuffer size\n"); - return -EINVAL; -} - -/** - * audio_probe_channel - probe function of the driver module - * @iface: pointer to interface instance - * @channel_id: channel index/ID - * @cfg: pointer to actual channel configuration - * @parent: pointer to kobject (needed for sysfs hook-up) - * @arg_list: string that provides the name of the device to be created in /dev - * plus the desired audio resolution - * - * Creates sound card, pcm device, sets pcm ops and registers sound card. - * - * Returns 0 on success or error code otherwise. - */ -static int audio_probe_channel(struct most_interface *iface, int channel_id, - struct most_channel_config *cfg, - struct kobject *parent, char *arg_list) -{ - struct channel *channel; - struct snd_card *card; - struct snd_pcm *pcm; - int playback_count = 0; - int capture_count = 0; - int ret; - int direction; - char *card_name; - char *pcm_format; - - if (!iface) - return -EINVAL; - - if (cfg->data_type != MOST_CH_SYNC) { - pr_err("Incompatible channel type\n"); - return -EINVAL; - } - - if (get_channel(iface, channel_id)) { - pr_err("channel (%s:%d) is already linked\n", - iface->description, channel_id); - return -EINVAL; - } - - if (cfg->direction == MOST_CH_TX) { - playback_count = 1; - direction = SNDRV_PCM_STREAM_PLAYBACK; - } else { - capture_count = 1; - direction = SNDRV_PCM_STREAM_CAPTURE; - } - - ret = split_arg_list(arg_list, &card_name, &pcm_format); - if (ret < 0) { - pr_info("PCM format missing\n"); - return ret; - } - - ret = snd_card_create(-1, card_name, THIS_MODULE, -- sizeof(*channel), &card); - if (ret < 0) - return ret; - - channel = card->private_data; - channel->card = card; - channel->cfg = cfg; - channel->iface = iface; - channel->id = channel_id; - init_waitqueue_head(&channel->playback_waitq); - - if (audio_set_hw_params(&channel->pcm_hardware, pcm_format, cfg)) - goto err_free_card; - - snprintf(card->driver, sizeof(card->driver), "%s", DRIVER_NAME); - snprintf(card->shortname, sizeof(card->shortname), "Microchip MOST:%d", - card->number); - snprintf(card->longname, sizeof(card->longname), "%s at %s, ch %d", - card->shortname, iface->description, channel_id); - - ret = snd_pcm_new(card, card_name, 0, playback_count, - capture_count, &pcm); - if (ret < 0) - goto err_free_card; - - pcm->private_data = channel; - - snd_pcm_set_ops(pcm, direction, &pcm_ops); - - ret = snd_card_register(card); - if (ret < 0) - goto err_free_card; - - list_add_tail(&channel->list, &dev_list); - - return 0; - -err_free_card: - snd_card_free(card); - return ret; -} - -/** - * audio_disconnect_channel - function to disconnect a channel - * @iface: pointer to interface instance - * @channel_id: channel index - * - * This frees allocated memory and removes the sound card from ALSA - * - * Returns 0 on success or error code otherwise. - */ -static int audio_disconnect_channel(struct most_interface *iface, - int channel_id) -{ - struct channel *channel; - - channel = get_channel(iface, channel_id); - if (!channel) { - pr_err("sound_disconnect_channel(), invalid channel %d\n", - channel_id); - return -EINVAL; - } - - list_del(&channel->list); - snd_card_free(channel->card); - - return 0; -} - -/** - * audio_rx_completion - completion handler for rx channels - * @mbo: pointer to buffer object that has completed - * - * This searches for the channel this MBO belongs to and copy the data from MBO - * to ring buffer - * - * Returns 0 on success or error code otherwise. - */ -static int audio_rx_completion(struct mbo *mbo) -{ - struct channel *channel = get_channel(mbo->ifp, mbo->hdm_channel_id); - bool period_elapsed = false; - - if (!channel) { - pr_err("sound_rx_completion(), invalid channel %d\n", - mbo->hdm_channel_id); - return -EINVAL; - } - - if (channel->is_stream_running) - period_elapsed = copy_data(channel, mbo); - - most_put_mbo(mbo); - - if (period_elapsed) - snd_pcm_period_elapsed(channel->substream); - - return 0; -} - -/** - * audio_tx_completion - completion handler for tx channels - * @iface: pointer to interface instance - * @channel_id: channel index/ID - * - * This searches the channel that belongs to this combination of interface - * pointer and channel ID and wakes a process sitting in the wait queue of - * this channel. - * - * Returns 0 on success or error code otherwise. - */ -static int audio_tx_completion(struct most_interface *iface, int channel_id) -{ - struct channel *channel = get_channel(iface, channel_id); - - if (!channel) { - pr_err("sound_tx_completion(), invalid channel %d\n", - channel_id); - return -EINVAL; - } - - wake_up_interruptible(&channel->playback_waitq); - - return 0; -} - -/** - * Initialization of the struct most_aim - */ -static struct most_aim audio_aim = { - .name = DRIVER_NAME, - .probe_channel = audio_probe_channel, - .disconnect_channel = audio_disconnect_channel, - .rx_completion = audio_rx_completion, - .tx_completion = audio_tx_completion, -}; - -static int __init audio_init(void) -{ - pr_info("init()\n"); - - INIT_LIST_HEAD(&dev_list); - - return most_register_aim(&audio_aim); -} - -static void __exit audio_exit(void) -{ - struct channel *channel, *tmp; - - pr_info("exit()\n"); - - list_for_each_entry_safe(channel, tmp, &dev_list, list) { - list_del(&channel->list); - snd_card_free(channel->card); - } - - most_deregister_aim(&audio_aim); -} - -module_init(audio_init); -module_exit(audio_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Christian Gromm <christian.gromm@microchip.com>"); -MODULE_DESCRIPTION("Audio Application Interface Module for MostCore"); |