From 1ea0cef6934ccadc36395b60d8b8d58d69016e28 Mon Sep 17 00:00:00 2001 From: Christian Gromm Date: Tue, 2 Aug 2016 11:48:39 +0200 Subject: recipes-kernel: update driver recipes This patch changes the recipes to fetch the driver sources from AGL's src directory. It therefore removes the redundant source files from the recipe directory. Change-Id: Ib3c48a0c7e79144713ccd8e10a89185cd929b41c Signed-off-by: Christian Gromm --- recipes-kernel/aim-sound/files/COPYING | 340 -------------- recipes-kernel/aim-sound/files/Makefile | 18 - recipes-kernel/aim-sound/files/sound.c | 768 -------------------------------- 3 files changed, 1126 deletions(-) delete mode 100644 recipes-kernel/aim-sound/files/COPYING delete mode 100644 recipes-kernel/aim-sound/files/Makefile delete mode 100644 recipes-kernel/aim-sound/files/sound.c (limited to 'recipes-kernel/aim-sound/files') 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. And you must show them these terms so they know their -rights. - - We protect your rights with two steps: (1) copyright the software, and -(2) offer you this license which gives you legal permission to copy, -distribute and/or modify the software. - - Also, for each author's protection and ours, we want to make certain -that everyone understands that there is no warranty for this free -software. If the software is modified by someone else and passed on, we -want its recipients to know that what they have is not the original, so -that any problems introduced by others will not reflect on the original -authors' reputations. - - Finally, any free program is threatened constantly by software -patents. We wish to avoid the danger that redistributors of a free -program will individually obtain patent licenses, in effect making the -program proprietary. To prevent this, we have made it clear that any -patent must be licensed for everyone's free use or not licensed at all. - - The precise terms and conditions for copying, distribution and -modification follow. - - GNU GENERAL PUBLIC LICENSE - TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION - - 0. This License applies to any program or other work which contains -a notice placed by the copyright holder saying it may be distributed -under the terms of this General Public License. The "Program", below, -refers to any such program or work, and a "work based on the Program" -means either the Program or any derivative work under copyright law: -that is to say, a work containing the Program or a portion of it, -either verbatim or with modifications and/or translated into another -language. (Hereinafter, translation is included without limitation in -the term "modification".) Each licensee is addressed as "you". - -Activities other than copying, distribution and modification are not -covered by this License; they are outside its scope. The act of -running the Program is not restricted, and the output from the Program -is covered only if its contents constitute a work based on the -Program (independent of having been made by running the Program). -Whether that is true depends on what the Program does. - - 1. You may copy and distribute verbatim copies of the Program's -source code as you receive it, in any medium, provided that you -conspicuously and appropriately publish on each copy an appropriate -copyright notice and disclaimer of warranty; keep intact all the -notices that refer to this License and to the absence of any warranty; -and give any other recipients of the Program a copy of this License -along with the Program. - -You may charge a fee for the physical act of transferring a copy, and -you may at your option offer warranty protection in exchange for a fee. - - 2. You may modify your copy or copies of the Program or any portion -of it, thus forming a work based on the Program, and copy and -distribute such modifications or work under the terms of Section 1 -above, provided that you also meet all of these conditions: - - a) You must cause the modified files to carry prominent notices - stating that you changed the files and the date of any change. - - b) You must cause any work that you distribute or publish, that in - whole or in part contains or is derived from the Program or any - part thereof, to be licensed as a whole at no charge to all third - parties under the terms of this License. - - c) If the modified program normally reads commands interactively - when run, you must cause it, when started running for such - interactive use in the most ordinary way, to print or display an - announcement including an appropriate copyright notice and a - notice that there is no warranty (or else, saying that you provide - a warranty) and that users may redistribute the program under - these conditions, and telling the user how to view a copy of this - License. (Exception: if the Program itself is interactive but - does not normally print such an announcement, your work based on - the Program is not required to print an announcement.) - -These requirements apply to the modified work as a whole. If -identifiable sections of that work are not derived from the Program, -and can be reasonably considered independent and separate works in -themselves, then this License, and its terms, do not apply to those -sections when you distribute them as separate works. But when you -distribute the same sections as part of a whole which is a work based -on the Program, the distribution of the whole must be on the terms of -this License, whose permissions for other licensees extend to the -entire whole, and thus to each and every part regardless of who wrote it. - -Thus, it is not the intent of this section to claim rights or contest -your rights to work written entirely by you; rather, the intent is to -exercise the right to control the distribution of derivative or -collective works based on the Program. - -In addition, mere aggregation of another work not based on the Program -with the Program (or with a work based on the Program) on a volume of -a storage or distribution medium does not bring the other work under -the scope of this License. - - 3. You may copy and distribute the Program (or a work based on it, -under Section 2) in object code or executable form under the terms of -Sections 1 and 2 above provided that you also do one of the following: - - a) Accompany it with the complete corresponding machine-readable - source code, which must be distributed under the terms of Sections - 1 and 2 above on a medium customarily used for software interchange; or, - - b) Accompany it with a written offer, valid for at least three - years, to give any third party, for a charge no more than your - cost of physically performing source distribution, a complete - machine-readable copy of the corresponding source code, to be - distributed under the terms of Sections 1 and 2 above on a medium - customarily used for software interchange; or, - - c) Accompany it with the information you received as to the offer - to distribute corresponding source code. (This alternative is - allowed only for noncommercial distribution and only if you - received the program in object code or executable form with such - an offer, in accord with Subsection b above.) - -The source code for a work means the preferred form of the work for -making modifications to it. For an executable work, complete source -code means all the source code for all modules it contains, plus any -associated interface definition files, plus the scripts used to -control compilation and installation of the executable. However, as a -special exception, the source code distributed need not include -anything that is normally distributed (in either source or binary -form) with the major components (compiler, kernel, and so on) of the -operating system on which the executable runs, unless that component -itself accompanies the executable. - -If distribution of executable or object code is made by offering -access to copy from a designated place, then offering equivalent -access to copy the source code from the same place counts as -distribution of the source code, even though third parties are not -compelled to copy the source along with the object code. - - 4. You may not copy, modify, sublicense, or distribute the Program -except as expressly provided under this License. Any attempt -otherwise to copy, modify, sublicense or distribute the Program is -void, and will automatically terminate your rights under this License. -However, parties who have received copies, or rights, from you under -this License will not have their licenses terminated so long as such -parties remain in full compliance. - - 5. You are not required to accept this License, since you have not -signed it. However, nothing else grants you permission to modify or -distribute the Program or its derivative works. These actions are -prohibited by law if you do not accept this License. Therefore, by -modifying or distributing the Program (or any work based on the -Program), you indicate your acceptance of this License to do so, and -all its terms and conditions for copying, distributing or modifying -the Program or works based on it. - - 6. Each time you redistribute the Program (or any work based on the -Program), the recipient automatically receives a license from the -original licensor to copy, distribute or modify the Program subject to -these terms and conditions. You may not impose any further -restrictions on the recipients' exercise of the rights granted herein. -You are not responsible for enforcing compliance by third parties to -this License. - - 7. If, as a consequence of a court judgment or allegation of patent -infringement or for any other reason (not limited to patent issues), -conditions are imposed on you (whether by court order, agreement or -otherwise) that contradict the conditions of this License, they do not -excuse you from the conditions of this License. If you cannot -distribute so as to satisfy simultaneously your obligations under this -License and any other pertinent obligations, then as a consequence you -may not distribute the Program at all. For example, if a patent -license would not permit royalty-free redistribution of the Program by -all those who receive copies directly or indirectly through you, then -the only way you could satisfy both it and this License would be to -refrain entirely from distribution of the Program. - -If any portion of this section is held invalid or unenforceable under -any particular circumstance, the balance of the section is intended to -apply and the section as a whole is intended to apply in other -circumstances. - -It is not the purpose of this section to induce you to infringe any -patents or other property right claims or to contest validity of any -such claims; this section has the sole purpose of protecting the -integrity of the free software distribution system, which is -implemented by public license practices. Many people have made -generous contributions to the wide range of software distributed -through that system in reliance on consistent application of that -system; it is up to the author/donor to decide if he or she is willing -to distribute software through any other system and a licensee cannot -impose that choice. - -This section is intended to make thoroughly clear what is believed to -be a consequence of the rest of this License. - - 8. If the distribution and/or use of the Program is restricted in -certain countries either by patents or by copyrighted interfaces, the -original copyright holder who places the Program under this License -may add an explicit geographical distribution limitation excluding -those countries, so that distribution is permitted only in or among -countries not thus excluded. In such case, this License incorporates -the limitation as if written in the body of this License. - - 9. The Free Software Foundation may publish revised and/or new versions -of the General Public License from time to time. Such new versions will -be similar in spirit to the present version, but may differ in detail to -address new problems or concerns. - -Each version is given a distinguishing version number. If the Program -specifies a version number of this License which applies to it and "any -later version", you have the option of following the terms and conditions -either of that version or of any later version published by the Free -Software Foundation. If the Program does not specify a version number of -this License, you may choose any version ever published by the Free Software -Foundation. - - 10. If you wish to incorporate parts of the Program into other free -programs whose distribution conditions are different, write to the author -to ask for permission. For software which is copyrighted by the Free -Software Foundation, write to the Free Software Foundation; we sometimes -make exceptions for this. Our decision will be guided by the two goals -of preserving the free status of all derivatives of our free software and -of promoting the sharing and reuse of software generally. - - NO WARRANTY - - 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY -FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN -OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES -PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED -OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS -TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE -PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, -REPAIR OR CORRECTION. - - 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING -WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR -REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, -INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING -OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED -TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY -YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER -PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE -POSSIBILITY OF SUCH DAMAGES. - - END OF TERMS AND CONDITIONS - - How to Apply These Terms to Your New Programs - - If you develop a new program, and you want it to be of the greatest -possible use to the public, the best way to achieve this is to make it -free software which everyone can redistribute and change under these terms. - - To do so, attach the following notices to the program. It is safest -to attach them to the start of each source file to most effectively -convey the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - - Copyright (C) - - 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - -Also add information on how to contact you by electronic and paper mail. - -If the program is interactive, make it output a short notice like this -when it starts in an interactive mode: - - Gnomovision version 69, Copyright (C) year name of author - Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, the commands you use may -be called something other than `show w' and `show c'; they could even be -mouse-clicks or menu items--whatever suits your program. - -You should also get your employer (if you work as a programmer) or your -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the program - `Gnomovision' (which makes passes at compilers) written by James Hacker. - - , 1 April 1989 - Ty Coon, President of Vice - -This General Public License does not permit incorporating your program into -proprietary programs. If your program is a subroutine library, you may -consider it more useful to permit linking proprietary applications with the -library. If this is what you want to do, use the GNU Library General -Public License instead of this License. diff --git a/recipes-kernel/aim-sound/files/Makefile b/recipes-kernel/aim-sound/files/Makefile deleted file mode 100644 index 9defcc5e2..000000000 --- a/recipes-kernel/aim-sound/files/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# Makefile -# - -SRC := $(shell pwd) - -obj-m += aim_sound.o -aim_sound-y := sound.o -CFLAGS_sound.o := -I$(src)/../../mostcore/files/ - -all: - $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules - -modules_install: - $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install - -clean: - $(MAKE) -C $(KERNEL_SRC) M=$(SRC) clean - diff --git a/recipes-kernel/aim-sound/files/sound.c b/recipes-kernel/aim-sound/files/sound.c deleted file mode 100644 index 63b866b3c..000000000 --- a/recipes-kernel/aim-sound/files/sound.c +++ /dev/null @@ -1,768 +0,0 @@ -/* - * sound.c - Audio Application Interface Module for Mostcore - * - * Copyright (C) 2015 Microchip Technology Germany II GmbH & Co. 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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 "); -MODULE_DESCRIPTION("Audio Application Interface Module for MostCore"); -- cgit 1.2.3-korg