diff options
Diffstat (limited to 'recipes-kernel/mocca-usb')
| -rw-r--r-- | recipes-kernel/mocca-usb/.mocca-usb.bb.swp | bin | 0 -> 12288 bytes | |||
| -rw-r--r-- | recipes-kernel/mocca-usb/_files/COPYING | 340 | ||||
| -rw-r--r-- | recipes-kernel/mocca-usb/_files/Makefile | 17 | ||||
| -rw-r--r-- | recipes-kernel/mocca-usb/_files/_Makefile | 42 | ||||
| -rw-r--r-- | recipes-kernel/mocca-usb/_files/mocca_usb.c | 391 | ||||
| -rw-r--r-- | recipes-kernel/mocca-usb/mocca-usb.bb | 14 |
6 files changed, 804 insertions, 0 deletions
diff --git a/recipes-kernel/mocca-usb/.mocca-usb.bb.swp b/recipes-kernel/mocca-usb/.mocca-usb.bb.swp Binary files differnew file mode 100644 index 000000000..8e89cc84b --- /dev/null +++ b/recipes-kernel/mocca-usb/.mocca-usb.bb.swp diff --git a/recipes-kernel/mocca-usb/_files/COPYING b/recipes-kernel/mocca-usb/_files/COPYING new file mode 100644 index 000000000..6d45519c8 --- /dev/null +++ b/recipes-kernel/mocca-usb/_files/COPYING @@ -0,0 +1,340 @@ + 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. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + 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. + + <signature of Ty Coon>, 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/mocca-usb/_files/Makefile b/recipes-kernel/mocca-usb/_files/Makefile new file mode 100644 index 000000000..fd82dbcd6 --- /dev/null +++ b/recipes-kernel/mocca-usb/_files/Makefile @@ -0,0 +1,17 @@ +# Makefile +# + +SRC := $(shell pwd) + +obj-m += mocca_usb.o +CFLAGS_hdm_usb.o := -I$(src)/../../aim-network/files/ -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/mocca-usb/_files/_Makefile b/recipes-kernel/mocca-usb/_files/_Makefile new file mode 100644 index 000000000..406b18717 --- /dev/null +++ b/recipes-kernel/mocca-usb/_files/_Makefile @@ -0,0 +1,42 @@ +# set your module name here +# provide the following files +# +# MODULENAME.c the driver +# MODULENAME.h the include file +# MODULENAME_test.c the driver test program +# MODULENAME_test.sh the driver test script +# +MODULENAME := mocca-usb +### should not need to change stuff below ###################### + + +# KDIR := /lib/modules/$(shell uname -r)/build +#KDIR := /home/me/arm/linux-2.6.35.9/ +PWD := $(shell pwd) +CC := ${CROSS_COMPILE}gcc -Wall + +ifeq ($(KERNELRELEASE),) +all: + $(MAKE) V=0 -C $(KDIR) SUBDIRS=$(PWD) modules +else + obj-m := $(MODULENAME).o +endif + + +load: all + ssh root@10.0.0.3 'echo 0x46 > /sys/bus/i2c/devices/i2c-0/delete_device; rmmod /home/matrix/$(MODULENAME).ko' + scp $(MODULENAME).ko root@10.0.0.3:/home/matrix + ssh root@10.0.0.3 'insmod /home/matrix/$(MODULENAME).ko; echo k2l-i2c-0 0x46 > /sys/bus/i2c/devices/i2c-0/new_device' + +unload: + ssh root@10.0.0.3 'echo 0x46 > /sys/bus/i2c/devices/i2c-0/delete_device; rmmod /home/matrix/$(MODULENAME).ko' + +test: all + +clean: + -rm -f *.o *.ko modules.order Module.symvers *.mod.c .*.cmd $(MODULENAME)_test + -rm -rf .tmp_versions + +copy: + scp $(MODULENAME).ko root@10.0.0.3:/home/matrix + diff --git a/recipes-kernel/mocca-usb/_files/mocca_usb.c b/recipes-kernel/mocca-usb/_files/mocca_usb.c new file mode 100644 index 000000000..1a6793c80 --- /dev/null +++ b/recipes-kernel/mocca-usb/_files/mocca_usb.c @@ -0,0 +1,391 @@ +/* + * USB Skeleton driver - 2.2 + * + * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) + * + * 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, version 2. + * + * This driver is based on the 2.6.3 version of drivers/usb/usb-skeleton.c + * but has been rewritten to be easier to read and use. + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kref.h> +#include <linux/uaccess.h> +#include <linux/usb.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> + + +/* Define these values to match your devices */ +#define USB_MOCCA_VENDOR_ID 0x184f +#define USB_MOCCA_PRODUCT_ID_1 0x0007 +#define USB_MOCCA_PRODUCT_ID_2 0x0008 +#define USB_MOCCA_PRODUCT_ID_3 0x0009 +#define USB_MOCCA_PRODUCT_ID_4 0x0010 +#define USB_MOCCA_PRODUCT_ID_5 0x0011 +#define USB_MOCCA_PRODUCT_ID_6 0x0012 + +/* table of devices that work with this driver */ +static const struct usb_device_id mocca_table[] = { + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_1) }, + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_2) }, + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_3) }, + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_4) }, + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_5) }, + { USB_DEVICE(USB_MOCCA_VENDOR_ID, USB_MOCCA_PRODUCT_ID_6) }, + { } /* Terminating entry */ +}; +MODULE_DEVICE_TABLE (usb, mocca_table); + + +/* Get a minor range for your devices from the usb maintainer */ +#define USB_MOCCA_MINOR_BASE 221 /*TODO: change this minor number */ + +/* our private defines. if this grows any larger, use your own .h file */ +#define MAX_TRANSFER ( PAGE_SIZE - 512 ) +#define WRITES_IN_FLIGHT 8 + +/* Structure to hold all of our device specific stuff */ +struct mocca_skel { + struct usb_device * udev; /* the usb device for this device */ + struct usb_interface * interface; /* the interface for this device */ + struct semaphore limit_sem; /* limiting the number of writes in progress */ + unsigned char * bulk_in_buffer; /* the buffer to receive data */ + size_t bulk_in_size; /* the size of the receive buffer */ + __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */ + __u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */ + struct kref kref; +}; +#define to_mocca_dev(d) container_of(d, struct mocca_skel, kref) + +static struct usb_driver mocca_driver; +static spinlock_t spinLock; + +static void mocca_delete(struct kref *kref) +{ + struct mocca_skel *dev = to_mocca_dev(kref); + + usb_put_dev(dev->udev); + kfree (dev->bulk_in_buffer); + kfree (dev); +} + +static int mocca_open(struct inode *inode, struct file *file) +{ + struct mocca_skel *dev; + struct usb_interface *interface; + int subminor; + int retval = 0; + + subminor = iminor(inode); + + interface = usb_find_interface(&mocca_driver, subminor); + if (!interface) { + printk(KERN_ERR "%s - error, can't find device for minor %d", + __FUNCTION__, subminor); + retval = -ENODEV; + goto exit; + } + + dev = usb_get_intfdata(interface); + if (!dev) { + retval = -ENODEV; + goto exit; + } + + /* increment our usage count for the device */ + kref_get(&dev->kref); + + /* save our object in the file's private structure */ + file->private_data = dev; + +exit: + return retval; +} + +static int mocca_release(struct inode *inode, struct file *file) +{ + struct mocca_skel *dev; + + dev = (struct mocca_skel *)file->private_data; + if (dev == NULL) + return -ENODEV; + + /* decrement the count on our device */ + kref_put(&dev->kref, mocca_delete); + return 0; +} + +static ssize_t mocca_read(struct file *file, char *buffer, size_t count, loff_t *ppos) +{ + struct mocca_skel *dev; + int retval = 0; + int bytes_read; + + dev = (struct mocca_skel *)file->private_data; + + /* do a blocking bulk read to get data from the device */ + retval = usb_bulk_msg(dev->udev, + usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr), + dev->bulk_in_buffer, + min(dev->bulk_in_size, count), + &bytes_read, 10000); + + /* if the read was successful, copy the data to userspace */ + if (!retval) { + if (copy_to_user(buffer, dev->bulk_in_buffer, bytes_read)) + retval = -EFAULT; + else + retval = bytes_read; + } + + return retval; +} + +static void mocca_write_bulk_callback(struct urb *urb) +{ + struct mocca_skel *dev; + + dev = (struct mocca_skel *)urb->context; + + /* sync/async unlink faults aren't errors */ + if (urb->status && + !(urb->status == -ENOENT || + urb->status == -ECONNRESET || + urb->status == -ESHUTDOWN)) { + printk(KERN_ERR "%s - nonzero write bulk status received: %d", + __FUNCTION__, urb->status); + } + + /* free up our allocated buffer */ + usb_free_coherent(urb->dev, urb->transfer_buffer_length, + urb->transfer_buffer, urb->transfer_dma); + up(&dev->limit_sem); +} + +static ssize_t mocca_write(struct file *file, const char *user_buffer, size_t count, loff_t *ppos) +{ + struct mocca_skel *dev; + int retval = 0; + struct urb *urb = NULL; + char *buf = NULL; + size_t writesize = min(count, (size_t)MAX_TRANSFER); + + dev = (struct mocca_skel *)file->private_data; + + /* verify that we actually have some data to write */ + if (count == 0) + goto exit; + + /* limit the number of URBs in flight to stop a user from using up all RAM */ + if (down_interruptible(&dev->limit_sem)) { + retval = -ERESTARTSYS; + goto exit; + } + + /* create a urb, and a buffer for it, and copy the data to the urb */ + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) { + retval = -ENOMEM; + goto error; + } + + buf = usb_alloc_coherent(dev->udev, writesize, GFP_KERNEL, &urb->transfer_dma); + if (!buf) { + retval = -ENOMEM; + goto error; + } + + if (copy_from_user(buf, user_buffer, writesize)) { + retval = -EFAULT; + goto error; + } + + /* initialize the urb properly */ + usb_fill_bulk_urb(urb, dev->udev, + usb_sndbulkpipe(dev->udev, dev->bulk_out_endpointAddr), + buf, writesize, mocca_write_bulk_callback, dev); + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + /* send the data out the bulk port */ + retval = usb_submit_urb(urb, GFP_KERNEL); + if (retval) { + printk(KERN_ERR "%s - failed submitting write urb, error %d", __FUNCTION__, retval); + goto error; + } + + /* release our reference to this urb, the USB core will eventually free it entirely */ + usb_free_urb(urb); + +exit: + return writesize; + +error: + usb_free_coherent(dev->udev, writesize, buf, urb->transfer_dma); + usb_free_urb(urb); + up(&dev->limit_sem); + return retval; +} + +static struct file_operations mocca_fops = { + .owner = THIS_MODULE, + .read = mocca_read, + .write = mocca_write, + .open = mocca_open, + .release = mocca_release, +}; + +/* + * usb class driver info in order to get a minor number from the usb core, + * and to have the device registered with the driver core + */ +static struct usb_class_driver mocca_class = { + .name = "mocca%d", + .fops = &mocca_fops, + .minor_base = USB_MOCCA_MINOR_BASE, +}; + +static int mocca_probe(struct usb_interface *interface, const struct usb_device_id *id) +{ + struct mocca_skel *dev = NULL; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + size_t buffer_size; + int i; + int retval = -ENOMEM; + + spin_lock_init(&spinLock); + + /* allocate memory for our device state and initialize it */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) { + printk(KERN_ERR "Out of memory"); + goto error; + } + kref_init(&dev->kref); + sema_init(&dev->limit_sem, WRITES_IN_FLIGHT); + + dev->udev = usb_get_dev(interface_to_usbdev(interface)); + dev->interface = interface; + + /* set up the endpoint information */ + /* use only the first bulk-in and bulk-out endpoints */ + iface_desc = interface->cur_altsetting; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if (!dev->bulk_in_endpointAddr && + ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) + == USB_DIR_IN) && + ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) + == USB_ENDPOINT_XFER_BULK)) { + /* we found a bulk in endpoint */ + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + dev->bulk_in_size = buffer_size; + dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; + dev->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!dev->bulk_in_buffer) { + printk(KERN_ERR "Could not allocate bulk_in_buffer"); + goto error; + } + printk(KERN_INFO "Found bulk-in pipe, adress: %x, max packet size: %d", endpoint->bEndpointAddress, endpoint->wMaxPacketSize); + } + + if (!dev->bulk_out_endpointAddr && + ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) + == USB_DIR_OUT) && + ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) + == USB_ENDPOINT_XFER_BULK)) { + /* we found a bulk out endpoint */ + dev->bulk_out_endpointAddr = endpoint->bEndpointAddress; + printk(KERN_INFO "Found bulk-out pipe, adress: %x, max packet size: %d", endpoint->bEndpointAddress, endpoint->wMaxPacketSize); + } + } + if (!(dev->bulk_in_endpointAddr && dev->bulk_out_endpointAddr)) { + printk(KERN_ERR "Could not find both bulk-in and bulk-out endpoints"); + goto error; + } + + /* save our data pointer in this interface device */ + usb_set_intfdata(interface, dev); + + /* we can register the device now, as it is ready */ + retval = usb_register_dev(interface, &mocca_class); + if (retval) { + /* something prevented us from registering this driver */ + printk(KERN_ERR "Not able to get a minor for this device."); + usb_set_intfdata(interface, NULL); + goto error; + } + + /* let the user know what node this device is now attached to */ + dev_info(&interface->dev, + "K2L MOCCA device now attached to mocca%d", + interface->minor); + return 0; + +error: + if (dev) + kref_put(&dev->kref, mocca_delete); + return retval; +} + +static void mocca_disconnect(struct usb_interface *interface) +{ + struct mocca_skel *dev; + int minor = interface->minor; + + /* prevent mocca_open() from racing mocca_disconnect() */ + spin_lock(&spinLock); + + dev = usb_get_intfdata(interface); + usb_set_intfdata(interface, NULL); + + /* give back our minor */ + usb_deregister_dev(interface, &mocca_class); + + spin_unlock(&spinLock); + + /* decrement our usage count */ + kref_put(&dev->kref, mocca_delete); + + dev_info(&interface->dev, "K2L MOCCA device #%d now disconnected", minor); +} + +static struct usb_driver mocca_driver = { + .name = "k2l-mocca", + .probe = mocca_probe, + .disconnect = mocca_disconnect, + .id_table = mocca_table, +}; + +static int __init usb_mocca_init(void) +{ + int result; + + /* register this driver with the USB subsystem */ + result = usb_register(&mocca_driver); + if (result) + printk(KERN_ERR "usb_register failed. Error number %d", result); + + return result; +} + +static void __exit usb_mocca_exit(void) +{ + /* deregister this driver with the USB subsystem */ + usb_deregister(&mocca_driver); +} + +module_init (usb_mocca_init); +module_exit (usb_mocca_exit); + +MODULE_LICENSE("GPL"); diff --git a/recipes-kernel/mocca-usb/mocca-usb.bb b/recipes-kernel/mocca-usb/mocca-usb.bb new file mode 100644 index 000000000..6f4e5861c --- /dev/null +++ b/recipes-kernel/mocca-usb/mocca-usb.bb @@ -0,0 +1,14 @@ +DESCRIPTION = "Example of how to build an external Linux kernel module" +LICENSE = "GPLv2" +LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6" + +inherit module + +PV = "0.1" + +SRC_URI = "git://gerrit.automotivelinux.org/gerrit/src/can-lin/;protocol=https" +S = "${WORKDIR}/git/Usb-Driver" +SRCREV = "02ba272c0eb51b06160307b6cb71f91684772c8c" + +# The inherit of module.bbclass will automatically name module packages with +# "kernel-module-" prefix as required by the oe-core build environment. |