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-cdev/files/COPYING | 340 -------------------- recipes-kernel/aim-cdev/files/Makefile | 18 -- recipes-kernel/aim-cdev/files/cdev.c | 550 --------------------------------- 3 files changed, 908 deletions(-) delete mode 100644 recipes-kernel/aim-cdev/files/COPYING delete mode 100644 recipes-kernel/aim-cdev/files/Makefile delete mode 100644 recipes-kernel/aim-cdev/files/cdev.c (limited to 'recipes-kernel/aim-cdev/files') diff --git a/recipes-kernel/aim-cdev/files/COPYING b/recipes-kernel/aim-cdev/files/COPYING deleted file mode 100644 index 6d45519c..00000000 --- a/recipes-kernel/aim-cdev/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-cdev/files/Makefile b/recipes-kernel/aim-cdev/files/Makefile deleted file mode 100644 index 05853c26..00000000 --- a/recipes-kernel/aim-cdev/files/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# Makefile -# - -SRC := $(shell pwd) - -obj-m += aim_cdev.o -aim_cdev-y := cdev.o -CFLAGS_cdev.o := -I$(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-cdev/files/cdev.c b/recipes-kernel/aim-cdev/files/cdev.c deleted file mode 100644 index 3a2dbf14..00000000 --- a/recipes-kernel/aim-cdev/files/cdev.c +++ /dev/null @@ -1,550 +0,0 @@ -/* - * cdev.c - Application interfacing module for character devices - * - * Copyright (C) 2013-2015 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 -#include "mostcore.h" - -static dev_t aim_devno; -static struct class *aim_class; -static struct ida minor_id; -static unsigned int major; -static struct most_aim cdev_aim; - -struct aim_channel { - wait_queue_head_t wq; - spinlock_t unlink; /* synchronization lock to unlink channels */ - struct cdev cdev; - struct device *dev; - struct mutex io_mutex; - struct most_interface *iface; - struct most_channel_config *cfg; - unsigned int channel_id; - dev_t devno; - size_t mbo_offs; - DECLARE_KFIFO_PTR(fifo, typeof(struct mbo *)); - int access_ref; - struct list_head list; -}; - -#define to_channel(d) container_of(d, struct aim_channel, cdev) -static struct list_head channel_list; -static spinlock_t ch_list_lock; - -static inline bool ch_has_mbo(struct aim_channel *c) -{ - return channel_has_mbo(c->iface, c->channel_id, &cdev_aim) > 0; -} - -static inline bool ch_get_mbo(struct aim_channel *c, struct mbo **mbo) -{ - *mbo = most_get_mbo(c->iface, c->channel_id, &cdev_aim); - return *mbo; -} - -static struct aim_channel *get_channel(struct most_interface *iface, int id) -{ - struct aim_channel *c, *tmp; - unsigned long flags; - int found_channel = 0; - - spin_lock_irqsave(&ch_list_lock, flags); - list_for_each_entry_safe(c, tmp, &channel_list, list) { - if ((c->iface == iface) && (c->channel_id == id)) { - found_channel = 1; - break; - } - } - spin_unlock_irqrestore(&ch_list_lock, flags); - if (!found_channel) - return NULL; - return c; -} - -static void stop_channel(struct aim_channel *c) -{ - struct mbo *mbo; - - while (kfifo_out((struct kfifo *)&c->fifo, &mbo, 1)) - most_put_mbo(mbo); - most_stop_channel(c->iface, c->channel_id, &cdev_aim); -} - -static void destroy_cdev(struct aim_channel *c) -{ - unsigned long flags; - - device_destroy(aim_class, c->devno); - cdev_del(&c->cdev); - kfifo_free(&c->fifo); - spin_lock_irqsave(&ch_list_lock, flags); - list_del(&c->list); - spin_unlock_irqrestore(&ch_list_lock, flags); - ida_simple_remove(&minor_id, MINOR(c->devno)); -} - -/** - * aim_open - implements the syscall to open the device - * @inode: inode pointer - * @filp: file pointer - * - * This stores the channel pointer in the private data field of - * the file structure and activates the channel within the core. - */ -static int aim_open(struct inode *inode, struct file *filp) -{ - struct aim_channel *c; - int ret; - - c = to_channel(inode->i_cdev); - filp->private_data = c; - - if (((c->cfg->direction == MOST_CH_RX) && - ((filp->f_flags & O_ACCMODE) != O_RDONLY)) || - ((c->cfg->direction == MOST_CH_TX) && - ((filp->f_flags & O_ACCMODE) != O_WRONLY))) { - pr_info("WARN: Access flags mismatch\n"); - return -EACCES; - } - - mutex_lock(&c->io_mutex); - if (!c->dev) { - pr_info("WARN: Device is destroyed\n"); - mutex_unlock(&c->io_mutex); - return -EBUSY; - } - - if (c->access_ref) { - pr_info("WARN: Device is busy\n"); - mutex_unlock(&c->io_mutex); - return -EBUSY; - } - - c->mbo_offs = 0; - ret = most_start_channel(c->iface, c->channel_id, &cdev_aim); - if (!ret) - c->access_ref = 1; - mutex_unlock(&c->io_mutex); - return ret; -} - -/** - * aim_close - implements the syscall to close the device - * @inode: inode pointer - * @filp: file pointer - * - * This stops the channel within the core. - */ -static int aim_close(struct inode *inode, struct file *filp) -{ - struct aim_channel *c = to_channel(inode->i_cdev); - - mutex_lock(&c->io_mutex); - spin_lock(&c->unlink); - c->access_ref = 0; - spin_unlock(&c->unlink); - if (c->dev) { - stop_channel(c); - mutex_unlock(&c->io_mutex); - } else { - destroy_cdev(c); - mutex_unlock(&c->io_mutex); - kfree(c); - } - return 0; -} - -/** - * aim_write - implements the syscall to write to the device - * @filp: file pointer - * @buf: pointer to user buffer - * @count: number of bytes to write - * @offset: offset from where to start writing - */ -static ssize_t aim_write(struct file *filp, const char __user *buf, - size_t count, loff_t *offset) -{ - int ret; - size_t actual_len; - size_t max_len; - struct mbo *mbo = NULL; - struct aim_channel *c = filp->private_data; - - mutex_lock(&c->io_mutex); - while (c->dev && !ch_get_mbo(c, &mbo)) { - mutex_unlock(&c->io_mutex); - - if ((filp->f_flags & O_NONBLOCK)) - return -EAGAIN; - if (wait_event_interruptible(c->wq, ch_has_mbo(c) || !c->dev)) - return -ERESTARTSYS; - mutex_lock(&c->io_mutex); - } - - if (unlikely(!c->dev)) { - ret = -EPIPE; - goto unlock; - } - - max_len = c->cfg->buffer_size; - actual_len = min(count, max_len); - mbo->buffer_length = actual_len; - - if (copy_from_user(mbo->virt_address, buf, mbo->buffer_length)) { - ret = -EFAULT; - goto put_mbo; - } - - ret = most_submit_mbo(mbo); - if (ret) - goto put_mbo; - - mutex_unlock(&c->io_mutex); - return actual_len; -put_mbo: - most_put_mbo(mbo); -unlock: - mutex_unlock(&c->io_mutex); - return ret; -} - -/** - * aim_read - implements the syscall to read from the device - * @filp: file pointer - * @buf: pointer to user buffer - * @count: number of bytes to read - * @offset: offset from where to start reading - */ -static ssize_t -aim_read(struct file *filp, char __user *buf, size_t count, loff_t *offset) -{ - size_t to_copy, not_copied, copied; - struct mbo *mbo; - struct aim_channel *c = filp->private_data; - - mutex_lock(&c->io_mutex); - while (c->dev && !kfifo_peek(&c->fifo, &mbo)) { - mutex_unlock(&c->io_mutex); - if (filp->f_flags & O_NONBLOCK) - return -EAGAIN; - if (wait_event_interruptible(c->wq, - (!kfifo_is_empty(&c->fifo) || - (!c->dev)))) - return -ERESTARTSYS; - mutex_lock(&c->io_mutex); - } - - /* make sure we don't submit to gone devices */ - if (unlikely(!c->dev)) { - mutex_unlock(&c->io_mutex); - return -EIO; - } - - to_copy = min_t(size_t, - count, - mbo->processed_length - c->mbo_offs); - - not_copied = copy_to_user(buf, - mbo->virt_address + c->mbo_offs, - to_copy); - - copied = to_copy - not_copied; - - c->mbo_offs += copied; - if (c->mbo_offs >= mbo->processed_length) { - kfifo_skip(&c->fifo); - most_put_mbo(mbo); - c->mbo_offs = 0; - } - mutex_unlock(&c->io_mutex); - return copied; -} - -static unsigned int aim_poll(struct file *filp, poll_table *wait) -{ - struct aim_channel *c = filp->private_data; - unsigned int mask = 0; - - poll_wait(filp, &c->wq, wait); - - if (c->cfg->direction == MOST_CH_RX) { - if (!kfifo_is_empty(&c->fifo)) - mask |= POLLIN | POLLRDNORM; - } else { - if (ch_has_mbo(c)) - mask |= POLLOUT | POLLWRNORM; - } - return mask; -} - -/** - * Initialization of struct file_operations - */ -static const struct file_operations channel_fops = { - .owner = THIS_MODULE, - .read = aim_read, - .write = aim_write, - .open = aim_open, - .release = aim_close, - .poll = aim_poll, -}; - -/** - * aim_disconnect_channel - disconnect a channel - * @iface: pointer to interface instance - * @channel_id: channel index - * - * This frees allocated memory and removes the cdev that represents this - * channel in user space. - */ -static int aim_disconnect_channel(struct most_interface *iface, int channel_id) -{ - struct aim_channel *c; - - if (!iface) { - pr_info("Bad interface pointer\n"); - return -EINVAL; - } - - c = get_channel(iface, channel_id); - if (!c) - return -ENXIO; - - mutex_lock(&c->io_mutex); - spin_lock(&c->unlink); - c->dev = NULL; - spin_unlock(&c->unlink); - if (c->access_ref) { - stop_channel(c); - wake_up_interruptible(&c->wq); - mutex_unlock(&c->io_mutex); - } else { - destroy_cdev(c); - mutex_unlock(&c->io_mutex); - kfree(c); - } - return 0; -} - -/** - * aim_rx_completion - completion handler for rx channels - * @mbo: pointer to buffer object that has completed - * - * This searches for the channel linked to this MBO and stores it in the local - * fifo buffer. - */ -static int aim_rx_completion(struct mbo *mbo) -{ - struct aim_channel *c; - - if (!mbo) - return -EINVAL; - - c = get_channel(mbo->ifp, mbo->hdm_channel_id); - if (!c) - return -ENXIO; - - spin_lock(&c->unlink); - if (!c->access_ref || !c->dev) { - spin_unlock(&c->unlink); - return -EFAULT; - } - kfifo_in(&c->fifo, &mbo, 1); - spin_unlock(&c->unlink); -#ifdef DEBUG_MESG - if (kfifo_is_full(&c->fifo)) - pr_info("WARN: Fifo is full\n"); -#endif - wake_up_interruptible(&c->wq); - return 0; -} - -/** - * aim_tx_completion - completion handler for tx channels - * @iface: pointer to interface instance - * @channel_id: channel index/ID - * - * This wakes sleeping processes in the wait-queue. - */ -static int aim_tx_completion(struct most_interface *iface, int channel_id) -{ - struct aim_channel *c; - - if (!iface) { - pr_info("Bad interface pointer\n"); - return -EINVAL; - } - if ((channel_id < 0) || (channel_id >= iface->num_channels)) { - pr_info("Channel ID out of range\n"); - return -EINVAL; - } - - c = get_channel(iface, channel_id); - if (!c) - return -ENXIO; - wake_up_interruptible(&c->wq); - return 0; -} - -/** - * aim_probe - 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) - * @name: name of the device to be created - * - * This allocates achannel object and creates the device node in /dev - * - * Returns 0 on success or error code otherwise. - */ -static int aim_probe(struct most_interface *iface, int channel_id, - struct most_channel_config *cfg, - struct kobject *parent, char *name) -{ - struct aim_channel *c; - unsigned long cl_flags; - int retval; - int current_minor; - - if ((!iface) || (!cfg) || (!parent) || (!name)) { - pr_info("Probing AIM with bad arguments"); - return -EINVAL; - } - c = get_channel(iface, channel_id); - if (c) - return -EEXIST; - - current_minor = ida_simple_get(&minor_id, 0, 0, GFP_KERNEL); - if (current_minor < 0) - return current_minor; - - c = kzalloc(sizeof(*c), GFP_KERNEL); - if (!c) { - retval = -ENOMEM; - goto error_alloc_channel; - } - - c->devno = MKDEV(major, current_minor); - cdev_init(&c->cdev, &channel_fops); - c->cdev.owner = THIS_MODULE; - cdev_add(&c->cdev, c->devno, 1); - c->iface = iface; - c->cfg = cfg; - c->channel_id = channel_id; - c->access_ref = 0; - spin_lock_init(&c->unlink); - INIT_KFIFO(c->fifo); - retval = kfifo_alloc(&c->fifo, cfg->num_buffers, GFP_KERNEL); - if (retval) { - pr_info("failed to alloc channel kfifo"); - goto error_alloc_kfifo; - } - init_waitqueue_head(&c->wq); - mutex_init(&c->io_mutex); - spin_lock_irqsave(&ch_list_lock, cl_flags); - list_add_tail(&c->list, &channel_list); - spin_unlock_irqrestore(&ch_list_lock, cl_flags); - c->dev = device_create(aim_class, - NULL, - c->devno, - NULL, - "%s", name); - - retval = IS_ERR(c->dev); - if (retval) { - pr_info("failed to create new device node %s\n", name); - goto error_create_device; - } - kobject_uevent(&c->dev->kobj, KOBJ_ADD); - return 0; - -error_create_device: - kfifo_free(&c->fifo); - list_del(&c->list); -error_alloc_kfifo: - cdev_del(&c->cdev); - kfree(c); -error_alloc_channel: - ida_simple_remove(&minor_id, current_minor); - return retval; -} - -static struct most_aim cdev_aim = { - .name = "cdev", - .probe_channel = aim_probe, - .disconnect_channel = aim_disconnect_channel, - .rx_completion = aim_rx_completion, - .tx_completion = aim_tx_completion, -}; - -static int __init mod_init(void) -{ - pr_info("init()\n"); - - INIT_LIST_HEAD(&channel_list); - spin_lock_init(&ch_list_lock); - ida_init(&minor_id); - - if (alloc_chrdev_region(&aim_devno, 0, 50, "cdev") < 0) - return -EIO; - major = MAJOR(aim_devno); - - aim_class = class_create(THIS_MODULE, "most_cdev_aim"); - if (IS_ERR(aim_class)) { - pr_err("no udev support\n"); - goto free_cdev; - } - - if (most_register_aim(&cdev_aim)) - goto dest_class; - return 0; - -dest_class: - class_destroy(aim_class); -free_cdev: - unregister_chrdev_region(aim_devno, 1); - return -EIO; -} - -static void __exit mod_exit(void) -{ - struct aim_channel *c, *tmp; - - pr_info("exit module\n"); - - most_deregister_aim(&cdev_aim); - - list_for_each_entry_safe(c, tmp, &channel_list, list) { - destroy_cdev(c); - kfree(c); - } - class_destroy(aim_class); - unregister_chrdev_region(aim_devno, 1); - ida_destroy(&minor_id); -} - -module_init(mod_init); -module_exit(mod_exit); -MODULE_AUTHOR("Christian Gromm "); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("character device AIM for mostcore"); -- cgit 1.2.3-korg