diff options
Diffstat (limited to 'recipes-kernel/hdm-usb/files')
| -rw-r--r-- | recipes-kernel/hdm-usb/files/COPYING | 340 | ||||
| -rw-r--r-- | recipes-kernel/hdm-usb/files/Makefile | 17 | ||||
| -rw-r--r-- | recipes-kernel/hdm-usb/files/hdm_usb.c | 1438 |
3 files changed, 0 insertions, 1795 deletions
diff --git a/recipes-kernel/hdm-usb/files/COPYING b/recipes-kernel/hdm-usb/files/COPYING deleted file mode 100644 index 6d45519c8..000000000 --- a/recipes-kernel/hdm-usb/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. - - <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/hdm-usb/files/Makefile b/recipes-kernel/hdm-usb/files/Makefile deleted file mode 100644 index 0714f6b73..000000000 --- a/recipes-kernel/hdm-usb/files/Makefile +++ /dev/null @@ -1,17 +0,0 @@ -# Makefile -# - -SRC := $(shell pwd) - -obj-m += hdm_usb.o -CFLAGS_hdm_usb.o := -I$(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/hdm-usb/files/hdm_usb.c b/recipes-kernel/hdm-usb/files/hdm_usb.c deleted file mode 100644 index 41690f801..000000000 --- a/recipes-kernel/hdm-usb/files/hdm_usb.c +++ /dev/null @@ -1,1438 +0,0 @@ -/* - * hdm_usb.c - Hardware dependent module for USB - * - * 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 <linux/module.h> -#include <linux/fs.h> -#include <linux/usb.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/cdev.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/completion.h> -#include <linux/mutex.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/sysfs.h> -#include <linux/dma-mapping.h> -#include <linux/etherdevice.h> -#include <linux/uaccess.h> -#include "mostcore.h" -#include "networking.h" - -#define USB_MTU 512 -#define NO_ISOCHRONOUS_URB 0 -#define AV_PACKETS_PER_XACT 2 -#define BUF_CHAIN_SIZE 0xFFFF -#define MAX_NUM_ENDPOINTS 30 -#define MAX_SUFFIX_LEN 10 -#define MAX_STRING_LEN 80 -#define MAX_BUF_SIZE 0xFFFF -#define CEILING(x, y) (((x) + (y) - 1) / (y)) - -#define USB_VENDOR_ID_SMSC 0x0424 /* VID: SMSC */ -#define USB_DEV_ID_BRDG 0xC001 /* PID: USB Bridge */ -#define USB_DEV_ID_INIC 0xCF18 /* PID: USB INIC */ -#define HW_RESYNC 0x0000 -/* DRCI Addresses */ -#define DRCI_REG_NI_STATE 0x0100 -#define DRCI_REG_PACKET_BW 0x0101 -#define DRCI_REG_NODE_ADDR 0x0102 -#define DRCI_REG_NODE_POS 0x0103 -#define DRCI_REG_MEP_FILTER 0x0140 -#define DRCI_REG_HASH_TBL0 0x0141 -#define DRCI_REG_HASH_TBL1 0x0142 -#define DRCI_REG_HASH_TBL2 0x0143 -#define DRCI_REG_HASH_TBL3 0x0144 -#define DRCI_REG_HW_ADDR_HI 0x0145 -#define DRCI_REG_HW_ADDR_MI 0x0146 -#define DRCI_REG_HW_ADDR_LO 0x0147 -#define DRCI_REG_BASE 0x1100 -#define DRCI_COMMAND 0x02 -#define DRCI_READ_REQ 0xA0 -#define DRCI_WRITE_REQ 0xA1 - -/** - * struct buf_anchor - used to create a list of pending URBs - * @urb: pointer to USB request block - * @clear_work_obj: - * @list: linked list - * @urb_completion: - */ -struct buf_anchor { - struct urb *urb; - struct work_struct clear_work_obj; - struct list_head list; - struct completion urb_compl; -}; - -#define to_buf_anchor(w) container_of(w, struct buf_anchor, clear_work_obj) - -/** - * struct most_dci_obj - Direct Communication Interface - * @kobj:position in sysfs - * @usb_device: pointer to the usb device - */ -struct most_dci_obj { - struct kobject kobj; - struct usb_device *usb_device; -}; - -#define to_dci_obj(p) container_of(p, struct most_dci_obj, kobj) - -/** - * struct most_dev - holds all usb interface specific stuff - * @parent: parent object in sysfs - * @usb_device: pointer to usb device - * @iface: hardware interface - * @cap: channel capabilities - * @conf: channel configuration - * @dci: direct communication interface of hardware - * @hw_addr: MAC address of hardware - * @ep_address: endpoint address table - * @link_stat: link status of hardware - * @description: device description - * @suffix: suffix for channel name - * @anchor_list_lock: locks list access - * @padding_active: indicates channel uses padding - * @is_channel_healthy: health status table of each channel - * @anchor_list: list of anchored items - * @io_mutex: synchronize I/O with disconnect - * @link_stat_timer: timer for link status reports - * @poll_work_obj: work for polling link status - */ -struct most_dev { - struct kobject *parent; - struct usb_device *usb_device; - struct most_interface iface; - struct most_channel_capability *cap; - struct most_channel_config *conf; - struct most_dci_obj *dci; - u8 hw_addr[6]; - u8 *ep_address; - u16 link_stat; - char description[MAX_STRING_LEN]; - char suffix[MAX_NUM_ENDPOINTS][MAX_SUFFIX_LEN]; - spinlock_t anchor_list_lock[MAX_NUM_ENDPOINTS]; - bool padding_active[MAX_NUM_ENDPOINTS]; - bool is_channel_healthy[MAX_NUM_ENDPOINTS]; - struct list_head *anchor_list; - struct mutex io_mutex; - struct timer_list link_stat_timer; - struct work_struct poll_work_obj; -}; - -#define to_mdev(d) container_of(d, struct most_dev, iface) -#define to_mdev_from_work(w) container_of(w, struct most_dev, poll_work_obj) - -static struct workqueue_struct *schedule_usb_work; -static void wq_clear_halt(struct work_struct *wq_obj); -static void wq_netinfo(struct work_struct *wq_obj); - -/** - * drci_rd_reg - read a DCI register - * @dev: usb device - * @reg: register address - * @buf: buffer to store data - * - * This is reads data from INIC's direct register communication interface - */ -static inline int drci_rd_reg(struct usb_device *dev, u16 reg, u16 *buf) -{ - int retval; - u16 *dma_buf = kzalloc(sizeof(u16), GFP_KERNEL); - u8 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE; - - if (!dma_buf) - return -ENOMEM; - - retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), - DRCI_READ_REQ, req_type, - 0x0000, - reg, dma_buf, sizeof(u16), 5 * HZ); - *buf = le16_to_cpu(*dma_buf); - kfree(dma_buf); - - return retval; -} - -/** - * drci_wr_reg - write a DCI register - * @dev: usb device - * @reg: register address - * @data: data to write - * - * This is writes data to INIC's direct register communication interface - */ -static inline int drci_wr_reg(struct usb_device *dev, u16 reg, u16 data) -{ - return usb_control_msg(dev, - usb_sndctrlpipe(dev, 0), - DRCI_WRITE_REQ, - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - data, - reg, - NULL, - 0, - 5 * HZ); -} - -/** - * free_anchored_buffers - free device's anchored items - * @mdev: the device - * @channel: channel ID - */ -static void free_anchored_buffers(struct most_dev *mdev, unsigned int channel) -{ - struct mbo *mbo; - struct buf_anchor *anchor, *tmp; - unsigned long flags; - - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_for_each_entry_safe(anchor, tmp, &mdev->anchor_list[channel], - list) { - struct urb *urb = anchor->urb; - - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - if (likely(urb)) { - mbo = urb->context; - if (!irqs_disabled()) { - usb_kill_urb(urb); - } else { - usb_unlink_urb(urb); - wait_for_completion(&anchor->urb_compl); - } - if ((mbo) && (mbo->complete)) { - mbo->status = MBO_E_CLOSE; - mbo->processed_length = 0; - mbo->complete(mbo); - } - usb_free_urb(urb); - } - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_del(&anchor->list); - kfree(anchor); - } - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); -} - -/** - * get_stream_frame_size - calculate frame size of current configuration - * @cfg: channel configuration - */ -static unsigned int get_stream_frame_size(struct most_channel_config *cfg) -{ - unsigned int frame_size = 0; - unsigned int sub_size = cfg->subbuffer_size; - - if (!sub_size) { - pr_warn("Misconfig: Subbuffer size zero.\n"); - return frame_size; - } - switch (cfg->data_type) { - case MOST_CH_ISOC_AVP: - frame_size = AV_PACKETS_PER_XACT * sub_size; - break; - case MOST_CH_SYNC: - if (cfg->packets_per_xact == 0) { - pr_warn("Misconfig: Packets per XACT zero\n"); - frame_size = 0; - } else if (cfg->packets_per_xact == 0xFF) { - frame_size = (USB_MTU / sub_size) * sub_size; - } else { - frame_size = cfg->packets_per_xact * sub_size; - } - break; - default: - pr_warn("Query frame size of non-streaming channel\n"); - break; - } - return frame_size; -} - -/** - * hdm_poison_channel - mark buffers of this channel as invalid - * @iface: pointer to the interface - * @channel: channel ID - * - * This unlinks all URBs submitted to the HCD, - * calls the associated completion function of the core and removes - * them from the list. - * - * Returns 0 on success or error code otherwise. - */ -static int hdm_poison_channel(struct most_interface *iface, int channel) -{ - struct most_dev *mdev; - - mdev = to_mdev(iface); - if (unlikely(!iface)) { - dev_warn(&mdev->usb_device->dev, "Poison: Bad interface.\n"); - return -EIO; - } - if (unlikely((channel < 0) || (channel >= iface->num_channels))) { - dev_warn(&mdev->usb_device->dev, "Channel ID out of range.\n"); - return -ECHRNG; - } - - mdev->is_channel_healthy[channel] = false; - - mutex_lock(&mdev->io_mutex); - free_anchored_buffers(mdev, channel); - if (mdev->padding_active[channel]) - mdev->padding_active[channel] = false; - - if (mdev->conf[channel].data_type == MOST_CH_ASYNC) { - del_timer_sync(&mdev->link_stat_timer); - cancel_work_sync(&mdev->poll_work_obj); - } - mutex_unlock(&mdev->io_mutex); - return 0; -} - -/** - * hdm_add_padding - add padding bytes - * @mdev: most device - * @channel: channel ID - * @mbo: buffer object - * - * This inserts the INIC hardware specific padding bytes into a streaming - * channel's buffer - */ -static int hdm_add_padding(struct most_dev *mdev, int channel, struct mbo *mbo) -{ - struct most_channel_config *conf = &mdev->conf[channel]; - unsigned int j, num_frames, frame_size; - u16 rd_addr, wr_addr; - - frame_size = get_stream_frame_size(conf); - if (!frame_size) - return -EIO; - num_frames = mbo->buffer_length / frame_size; - - if (num_frames < 1) { - dev_err(&mdev->usb_device->dev, - "Missed minimal transfer unit.\n"); - return -EIO; - } - - for (j = 1; j < num_frames; j++) { - wr_addr = (num_frames - j) * USB_MTU; - rd_addr = (num_frames - j) * frame_size; - memmove(mbo->virt_address + wr_addr, - mbo->virt_address + rd_addr, - frame_size); - } - mbo->buffer_length = num_frames * USB_MTU; - return 0; -} - -/** - * hdm_remove_padding - remove padding bytes - * @mdev: most device - * @channel: channel ID - * @mbo: buffer object - * - * This takes the INIC hardware specific padding bytes off a streaming - * channel's buffer. - */ -static int hdm_remove_padding(struct most_dev *mdev, int channel, - struct mbo *mbo) -{ - unsigned int j, num_frames, frame_size; - struct most_channel_config *const conf = &mdev->conf[channel]; - - frame_size = get_stream_frame_size(conf); - if (!frame_size) - return -EIO; - num_frames = mbo->processed_length / USB_MTU; - - for (j = 1; j < num_frames; j++) - memmove(mbo->virt_address + frame_size * j, - mbo->virt_address + USB_MTU * j, - frame_size); - - mbo->processed_length = frame_size * num_frames; - return 0; -} - -/** - * hdm_write_completion - completion function for submitted Tx URBs - * @urb: the URB that has been completed - * - * This checks the status of the completed URB. In case the URB has been - * unlinked before, it is immediately freed. On any other error the MBO - * transfer flag is set. On success it frees allocated resources and calls - * the completion function. - * - * Context: interrupt! - */ -static void hdm_write_completion(struct urb *urb) -{ - struct mbo *mbo; - struct buf_anchor *anchor; - struct most_dev *mdev; - struct device *dev; - unsigned int channel; - unsigned long flags; - - mbo = urb->context; - anchor = mbo->priv; - mdev = to_mdev(mbo->ifp); - channel = mbo->hdm_channel_id; - dev = &mdev->usb_device->dev; - - if ((urb->status == -ENOENT) || (urb->status == -ECONNRESET) || - (!mdev->is_channel_healthy[channel])) { - complete(&anchor->urb_compl); - return; - } - - if (unlikely(urb->status && !(urb->status == -ENOENT || - urb->status == -ECONNRESET || - urb->status == -ESHUTDOWN))) { - mbo->processed_length = 0; - switch (urb->status) { - case -EPIPE: - dev_warn(dev, "Broken OUT pipe detected\n"); - most_stop_enqueue(&mdev->iface, channel); - mbo->status = MBO_E_INVAL; - usb_unlink_urb(urb); - INIT_WORK(&anchor->clear_work_obj, wq_clear_halt); - queue_work(schedule_usb_work, &anchor->clear_work_obj); - return; - case -ENODEV: - case -EPROTO: - mbo->status = MBO_E_CLOSE; - break; - default: - mbo->status = MBO_E_INVAL; - break; - } - } else { - mbo->status = MBO_SUCCESS; - mbo->processed_length = urb->actual_length; - } - - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_del(&anchor->list); - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - kfree(anchor); - - if (likely(mbo->complete)) - mbo->complete(mbo); - usb_free_urb(urb); -} - -/** - * hdm_read_completion - completion function for submitted Rx URBs - * @urb: the URB that has been completed - * - * This checks the status of the completed URB. In case the URB has been - * unlinked before it is immediately freed. On any other error the MBO transfer - * flag is set. On success it frees allocated resources, removes - * padding bytes -if necessary- and calls the completion function. - * - * Context: interrupt! - * - * ************************************************************************** - * Error codes returned by in urb->status - * or in iso_frame_desc[n].status (for ISO) - * ************************************************************************* - * - * USB device drivers may only test urb status values in completion handlers. - * This is because otherwise there would be a race between HCDs updating - * these values on one CPU, and device drivers testing them on another CPU. - * - * A transfer's actual_length may be positive even when an error has been - * reported. That's because transfers often involve several packets, so that - * one or more packets could finish before an error stops further endpoint I/O. - * - * For isochronous URBs, the urb status value is non-zero only if the URB is - * unlinked, the device is removed, the host controller is disabled or the total - * transferred length is less than the requested length and the URB_SHORT_NOT_OK - * flag is set. Completion handlers for isochronous URBs should only see - * urb->status set to zero, -ENOENT, -ECONNRESET, -ESHUTDOWN, or -EREMOTEIO. - * Individual frame descriptor status fields may report more status codes. - * - * - * 0 Transfer completed successfully - * - * -ENOENT URB was synchronously unlinked by usb_unlink_urb - * - * -EINPROGRESS URB still pending, no results yet - * (That is, if drivers see this it's a bug.) - * - * -EPROTO (*, **) a) bitstuff error - * b) no response packet received within the - * prescribed bus turn-around time - * c) unknown USB error - * - * -EILSEQ (*, **) a) CRC mismatch - * b) no response packet received within the - * prescribed bus turn-around time - * c) unknown USB error - * - * Note that often the controller hardware does not - * distinguish among cases a), b), and c), so a - * driver cannot tell whether there was a protocol - * error, a failure to respond (often caused by - * device disconnect), or some other fault. - * - * -ETIME (**) No response packet received within the prescribed - * bus turn-around time. This error may instead be - * reported as -EPROTO or -EILSEQ. - * - * -ETIMEDOUT Synchronous USB message functions use this code - * to indicate timeout expired before the transfer - * completed, and no other error was reported by HC. - * - * -EPIPE (**) Endpoint stalled. For non-control endpoints, - * reset this status with usb_clear_halt(). - * - * -ECOMM During an IN transfer, the host controller - * received data from an endpoint faster than it - * could be written to system memory - * - * -ENOSR During an OUT transfer, the host controller - * could not retrieve data from system memory fast - * enough to keep up with the USB data rate - * - * -EOVERFLOW (*) The amount of data returned by the endpoint was - * greater than either the max packet size of the - * endpoint or the remaining buffer size. "Babble". - * - * -EREMOTEIO The data read from the endpoint did not fill the - * specified buffer, and URB_SHORT_NOT_OK was set in - * urb->transfer_flags. - * - * -ENODEV Device was removed. Often preceded by a burst of - * other errors, since the hub driver doesn't detect - * device removal events immediately. - * - * -EXDEV ISO transfer only partially completed - * (only set in iso_frame_desc[n].status, not urb->status) - * - * -EINVAL ISO madness, if this happens: Log off and go home - * - * -ECONNRESET URB was asynchronously unlinked by usb_unlink_urb - * - * -ESHUTDOWN The device or host controller has been disabled due - * to some problem that could not be worked around, - * such as a physical disconnect. - * - * - * (*) Error codes like -EPROTO, -EILSEQ and -EOVERFLOW normally indicate - * hardware problems such as bad devices (including firmware) or cables. - * - * (**) This is also one of several codes that different kinds of host - * controller use to indicate a transfer has failed because of device - * disconnect. In the interval before the hub driver starts disconnect - * processing, devices may receive such fault reports for every request. - * - * See <https://www.kernel.org/doc/Documentation/usb/error-codes.txt> - */ -static void hdm_read_completion(struct urb *urb) -{ - struct mbo *mbo; - struct buf_anchor *anchor; - struct most_dev *mdev; - struct device *dev; - unsigned long flags; - unsigned int channel; - - mbo = urb->context; - anchor = mbo->priv; - mdev = to_mdev(mbo->ifp); - channel = mbo->hdm_channel_id; - dev = &mdev->usb_device->dev; - - if ((urb->status == -ENOENT) || (urb->status == -ECONNRESET) || - (!mdev->is_channel_healthy[channel])) { - complete(&anchor->urb_compl); - return; - } - - if (unlikely(urb->status && !(urb->status == -ENOENT || - urb->status == -ECONNRESET || - urb->status == -ESHUTDOWN))) { - mbo->processed_length = 0; - switch (urb->status) { - case -EPIPE: - dev_warn(dev, "Broken IN pipe detected\n"); - mbo->status = MBO_E_INVAL; - usb_unlink_urb(urb); - INIT_WORK(&anchor->clear_work_obj, wq_clear_halt); - queue_work(schedule_usb_work, &anchor->clear_work_obj); - return; - case -ENODEV: - case -EPROTO: - mbo->status = MBO_E_CLOSE; - break; - case -EOVERFLOW: - dev_warn(dev, "Babble on IN pipe detected\n"); - default: - mbo->status = MBO_E_INVAL; - break; - } - } else { - mbo->processed_length = urb->actual_length; - if (!mdev->padding_active[channel]) { - mbo->status = MBO_SUCCESS; - } else { - if (hdm_remove_padding(mdev, channel, mbo)) { - mbo->processed_length = 0; - mbo->status = MBO_E_INVAL; - } else { - mbo->status = MBO_SUCCESS; - } - } - } - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_del(&anchor->list); - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - kfree(anchor); - - if (likely(mbo->complete)) - mbo->complete(mbo); - usb_free_urb(urb); -} - -/** - * hdm_enqueue - receive a buffer to be used for data transfer - * @iface: interface to enqueue to - * @channel: ID of the channel - * @mbo: pointer to the buffer object - * - * This allocates a new URB and fills it according to the channel - * that is being used for transmission of data. Before the URB is - * submitted it is stored in the private anchor list. - * - * Returns 0 on success. On any error the URB is freed and a error code - * is returned. - * - * Context: Could in _some_ cases be interrupt! - */ -static int hdm_enqueue(struct most_interface *iface, int channel, - struct mbo *mbo) -{ - struct most_dev *mdev; - struct buf_anchor *anchor; - struct most_channel_config *conf; - struct device *dev; - int retval = 0; - struct urb *urb; - unsigned long flags; - unsigned long length; - void *virt_address; - - if (unlikely(!iface || !mbo)) - return -EIO; - if (unlikely(iface->num_channels <= channel) || (channel < 0)) - return -ECHRNG; - - mdev = to_mdev(iface); - conf = &mdev->conf[channel]; - dev = &mdev->usb_device->dev; - - if (!mdev->usb_device) - return -ENODEV; - - urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_ATOMIC); - if (!urb) { - dev_err(dev, "Failed to allocate URB\n"); - return -ENOMEM; - } - - anchor = kzalloc(sizeof(*anchor), GFP_ATOMIC); - if (!anchor) { - retval = -ENOMEM; - goto _error; - } - - anchor->urb = urb; - init_completion(&anchor->urb_compl); - mbo->priv = anchor; - - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_add_tail(&anchor->list, &mdev->anchor_list[channel]); - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - - if ((mdev->padding_active[channel]) && - (conf->direction & MOST_CH_TX)) - if (hdm_add_padding(mdev, channel, mbo)) { - retval = -EIO; - goto _error_1; - } - - urb->transfer_dma = mbo->bus_address; - virt_address = mbo->virt_address; - length = mbo->buffer_length; - - if (conf->direction & MOST_CH_TX) { - usb_fill_bulk_urb(urb, mdev->usb_device, - usb_sndbulkpipe(mdev->usb_device, - mdev->ep_address[channel]), - virt_address, - length, - hdm_write_completion, - mbo); - if (conf->data_type != MOST_CH_ISOC_AVP) - urb->transfer_flags |= URB_ZERO_PACKET; - } else { - usb_fill_bulk_urb(urb, mdev->usb_device, - usb_rcvbulkpipe(mdev->usb_device, - mdev->ep_address[channel]), - virt_address, - length + conf->extra_len, - hdm_read_completion, - mbo); - } - urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - - retval = usb_submit_urb(urb, GFP_KERNEL); - if (retval) { - dev_err(dev, "URB submit failed with error %d.\n", retval); - goto _error_1; - } - return 0; - -_error_1: - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_del(&anchor->list); - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - kfree(anchor); -_error: - usb_free_urb(urb); - return retval; -} - -/** - * hdm_configure_channel - receive channel configuration from core - * @iface: interface - * @channel: channel ID - * @conf: structure that holds the configuration information - */ -static int hdm_configure_channel(struct most_interface *iface, int channel, - struct most_channel_config *conf) -{ - unsigned int num_frames; - unsigned int frame_size; - unsigned int temp_size; - unsigned int tail_space; - struct most_dev *mdev; - struct device *dev; - - mdev = to_mdev(iface); - mdev->is_channel_healthy[channel] = true; - dev = &mdev->usb_device->dev; - - if (unlikely(!iface || !conf)) { - dev_err(dev, "Bad interface or config pointer.\n"); - return -EINVAL; - } - if (unlikely((channel < 0) || (channel >= iface->num_channels))) { - dev_err(dev, "Channel ID out of range.\n"); - return -EINVAL; - } - if ((!conf->num_buffers) || (!conf->buffer_size)) { - dev_err(dev, "Misconfig: buffer size or #buffers zero.\n"); - return -EINVAL; - } - - if (!(conf->data_type == MOST_CH_SYNC) && - !((conf->data_type == MOST_CH_ISOC_AVP) && - (conf->packets_per_xact != 0xFF))) { - mdev->padding_active[channel] = false; - goto exit; - } - - mdev->padding_active[channel] = true; - temp_size = conf->buffer_size; - - frame_size = get_stream_frame_size(conf); - if ((frame_size == 0) || (frame_size > USB_MTU)) { - dev_warn(dev, "Misconfig: frame size wrong\n"); - return -EINVAL; - } - - if (conf->buffer_size % frame_size) { - u16 tmp_val; - - tmp_val = conf->buffer_size / frame_size; - conf->buffer_size = tmp_val * frame_size; - dev_notice(dev, - "Channel %d - rounding buffer size to %d bytes, channel config says %d bytes\n", - channel, - conf->buffer_size, - temp_size); - } - - num_frames = conf->buffer_size / frame_size; - tail_space = num_frames * (USB_MTU - frame_size); - temp_size += tail_space; - - /* calculate extra length to comply w/ HW padding */ - conf->extra_len = (CEILING(temp_size, USB_MTU) * USB_MTU) - - conf->buffer_size; -exit: - mdev->conf[channel] = *conf; - return 0; -} - -/** - * hdm_update_netinfo - retrieve latest networking information - * @mdev: device interface - * - * This triggers the USB vendor requests to read the hardware address and - * the current link status of the attached device. - */ -static int hdm_update_netinfo(struct most_dev *mdev) -{ - struct usb_device *usb_device = mdev->usb_device; - struct device *dev = &usb_device->dev; - u16 hi, mi, lo, link; - - if (!is_valid_ether_addr(mdev->hw_addr)) { - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_HI, &hi) < 0) { - dev_err(dev, "Vendor request \"hw_addr_hi\" failed\n"); - return -1; - } - - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_MI, &mi) < 0) { - dev_err(dev, "Vendor request \"hw_addr_mid\" failed\n"); - return -1; - } - - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_LO, &lo) < 0) { - dev_err(dev, "Vendor request \"hw_addr_low\" failed\n"); - return -1; - } - - mutex_lock(&mdev->io_mutex); - mdev->hw_addr[0] = hi >> 8; - mdev->hw_addr[1] = hi; - mdev->hw_addr[2] = mi >> 8; - mdev->hw_addr[3] = mi; - mdev->hw_addr[4] = lo >> 8; - mdev->hw_addr[5] = lo; - mutex_unlock(&mdev->io_mutex); - } - - if (drci_rd_reg(usb_device, DRCI_REG_NI_STATE, &link) < 0) { - dev_err(dev, "Vendor request \"link status\" failed\n"); - return -1; - } - - mutex_lock(&mdev->io_mutex); - mdev->link_stat = link; - mutex_unlock(&mdev->io_mutex); - return 0; -} - -/** - * hdm_request_netinfo - request network information - * @iface: pointer to interface - * @channel: channel ID - * - * This is used as trigger to set up the link status timer that - * polls for the NI state of the INIC every 2 seconds. - * - */ -static void hdm_request_netinfo(struct most_interface *iface, int channel) -{ - struct most_dev *mdev; - - BUG_ON(!iface); - mdev = to_mdev(iface); - mdev->link_stat_timer.expires = jiffies + HZ; - mod_timer(&mdev->link_stat_timer, mdev->link_stat_timer.expires); -} - -/** - * link_stat_timer_handler - add work to link_stat work queue - * @data: pointer to USB device instance - * - * The handler runs in interrupt context. That's why we need to defer the - * tasks to a work queue. - */ -static void link_stat_timer_handler(unsigned long data) -{ - struct most_dev *mdev = (struct most_dev *)data; - - queue_work(schedule_usb_work, &mdev->poll_work_obj); - mdev->link_stat_timer.expires = jiffies + (2 * HZ); - add_timer(&mdev->link_stat_timer); -} - -/** - * wq_netinfo - work queue function - * @wq_obj: object that holds data for our deferred work to do - * - * This retrieves the network interface status of the USB INIC - * and compares it with the current status. If the status has - * changed, it updates the status of the core. - */ -static void wq_netinfo(struct work_struct *wq_obj) -{ - struct most_dev *mdev; - int i, prev_link_stat; - u8 prev_hw_addr[6]; - - mdev = to_mdev_from_work(wq_obj); - prev_link_stat = mdev->link_stat; - - for (i = 0; i < 6; i++) - prev_hw_addr[i] = mdev->hw_addr[i]; - - if (hdm_update_netinfo(mdev) < 0) - return; - if ((prev_link_stat != mdev->link_stat) || - (prev_hw_addr[0] != mdev->hw_addr[0]) || - (prev_hw_addr[1] != mdev->hw_addr[1]) || - (prev_hw_addr[2] != mdev->hw_addr[2]) || - (prev_hw_addr[3] != mdev->hw_addr[3]) || - (prev_hw_addr[4] != mdev->hw_addr[4]) || - (prev_hw_addr[5] != mdev->hw_addr[5])) - most_deliver_netinfo(&mdev->iface, mdev->link_stat, - &mdev->hw_addr[0]); -} - -/** - * wq_clear_halt - work queue function - * @wq_obj: work_struct object to execute - * - * This sends a clear_halt to the given USB pipe. - */ -static void wq_clear_halt(struct work_struct *wq_obj) -{ - struct buf_anchor *anchor; - struct most_dev *mdev; - struct mbo *mbo; - struct urb *urb; - unsigned int channel; - unsigned long flags; - - anchor = to_buf_anchor(wq_obj); - urb = anchor->urb; - mbo = urb->context; - mdev = to_mdev(mbo->ifp); - channel = mbo->hdm_channel_id; - - if (usb_clear_halt(urb->dev, urb->pipe)) - dev_warn(&mdev->usb_device->dev, "Failed to reset endpoint.\n"); - - usb_free_urb(urb); - spin_lock_irqsave(&mdev->anchor_list_lock[channel], flags); - list_del(&anchor->list); - spin_unlock_irqrestore(&mdev->anchor_list_lock[channel], flags); - - if (likely(mbo->complete)) - mbo->complete(mbo); - if (mdev->conf[channel].direction & MOST_CH_TX) - most_resume_enqueue(&mdev->iface, channel); - - kfree(anchor); -} - -/** - * hdm_usb_fops - file operation table for USB driver - */ -static const struct file_operations hdm_usb_fops = { - .owner = THIS_MODULE, -}; - -/** - * usb_device_id - ID table for HCD device probing - */ -static struct usb_device_id usbid[] = { - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_BRDG), }, - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_INIC), }, - { } /* Terminating entry */ -}; - -#define MOST_DCI_RO_ATTR(_name) \ - struct most_dci_attribute most_dci_attr_##_name = \ - __ATTR(_name, S_IRUGO, show_value, NULL) - -#define MOST_DCI_ATTR(_name) \ - struct most_dci_attribute most_dci_attr_##_name = \ - __ATTR(_name, S_IRUGO | S_IWUSR, show_value, store_value) - -/** - * struct most_dci_attribute - to access the attributes of a dci object - * @attr: attributes of a dci object - * @show: pointer to the show function - * @store: pointer to the store function - */ -struct most_dci_attribute { - struct attribute attr; - ssize_t (*show)(struct most_dci_obj *d, - struct most_dci_attribute *attr, - char *buf); - ssize_t (*store)(struct most_dci_obj *d, - struct most_dci_attribute *attr, - const char *buf, - size_t count); -}; - -#define to_dci_attr(a) container_of(a, struct most_dci_attribute, attr) - -/** - * dci_attr_show - show function for dci object - * @kobj: pointer to kobject - * @attr: pointer to attribute struct - * @buf: buffer - */ -static ssize_t dci_attr_show(struct kobject *kobj, struct attribute *attr, - char *buf) -{ - struct most_dci_attribute *dci_attr = to_dci_attr(attr); - struct most_dci_obj *dci_obj = to_dci_obj(kobj); - - if (!dci_attr->show) - return -EIO; - - return dci_attr->show(dci_obj, dci_attr, buf); -} - -/** - * dci_attr_store - store function for dci object - * @kobj: pointer to kobject - * @attr: pointer to attribute struct - * @buf: buffer - * @len: length of buffer - */ -static ssize_t dci_attr_store(struct kobject *kobj, - struct attribute *attr, - const char *buf, - size_t len) -{ - struct most_dci_attribute *dci_attr = to_dci_attr(attr); - struct most_dci_obj *dci_obj = to_dci_obj(kobj); - - if (!dci_attr->store) - return -EIO; - - return dci_attr->store(dci_obj, dci_attr, buf, len); -} - -static const struct sysfs_ops most_dci_sysfs_ops = { - .show = dci_attr_show, - .store = dci_attr_store, -}; - -/** - * most_dci_release - release function for dci object - * @kobj: pointer to kobject - * - * This frees the memory allocated for the dci object - */ -static void most_dci_release(struct kobject *kobj) -{ - struct most_dci_obj *dci_obj = to_dci_obj(kobj); - - kfree(dci_obj); -} - -static ssize_t show_value(struct most_dci_obj *dci_obj, - struct most_dci_attribute *attr, char *buf) -{ - u16 tmp_val; - u16 reg_addr; - int err; - - if (!strcmp(attr->attr.name, "ni_state")) - reg_addr = DRCI_REG_NI_STATE; - else if (!strcmp(attr->attr.name, "packet_bandwidth")) - reg_addr = DRCI_REG_PACKET_BW; - else if (!strcmp(attr->attr.name, "node_address")) - reg_addr = DRCI_REG_NODE_ADDR; - else if (!strcmp(attr->attr.name, "node_position")) - reg_addr = DRCI_REG_NODE_POS; - else if (!strcmp(attr->attr.name, "mep_filter")) - reg_addr = DRCI_REG_MEP_FILTER; - else if (!strcmp(attr->attr.name, "mep_hash0")) - reg_addr = DRCI_REG_HASH_TBL0; - else if (!strcmp(attr->attr.name, "mep_hash1")) - reg_addr = DRCI_REG_HASH_TBL1; - else if (!strcmp(attr->attr.name, "mep_hash2")) - reg_addr = DRCI_REG_HASH_TBL2; - else if (!strcmp(attr->attr.name, "mep_hash3")) - reg_addr = DRCI_REG_HASH_TBL3; - else if (!strcmp(attr->attr.name, "mep_eui48_hi")) - reg_addr = DRCI_REG_HW_ADDR_HI; - else if (!strcmp(attr->attr.name, "mep_eui48_mi")) - reg_addr = DRCI_REG_HW_ADDR_MI; - else if (!strcmp(attr->attr.name, "mep_eui48_lo")) - reg_addr = DRCI_REG_HW_ADDR_LO; - else - return -EIO; - - err = drci_rd_reg(dci_obj->usb_device, reg_addr, &tmp_val); - if (err < 0) - return err; - - return snprintf(buf, PAGE_SIZE, "%04x\n", tmp_val); -} - -static ssize_t store_value(struct most_dci_obj *dci_obj, - struct most_dci_attribute *attr, - const char *buf, size_t count) -{ - u16 val; - u16 reg_addr; - int err; - - if (!strcmp(attr->attr.name, "mep_filter")) - reg_addr = DRCI_REG_MEP_FILTER; - else if (!strcmp(attr->attr.name, "mep_hash0")) - reg_addr = DRCI_REG_HASH_TBL0; - else if (!strcmp(attr->attr.name, "mep_hash1")) - reg_addr = DRCI_REG_HASH_TBL1; - else if (!strcmp(attr->attr.name, "mep_hash2")) - reg_addr = DRCI_REG_HASH_TBL2; - else if (!strcmp(attr->attr.name, "mep_hash3")) - reg_addr = DRCI_REG_HASH_TBL3; - else if (!strcmp(attr->attr.name, "mep_eui48_hi")) - reg_addr = DRCI_REG_HW_ADDR_HI; - else if (!strcmp(attr->attr.name, "mep_eui48_mi")) - reg_addr = DRCI_REG_HW_ADDR_MI; - else if (!strcmp(attr->attr.name, "mep_eui48_lo")) - reg_addr = DRCI_REG_HW_ADDR_LO; - else - return -EIO; - - err = kstrtou16(buf, 16, &val); - if (err) - return err; - - err = drci_wr_reg(dci_obj->usb_device, reg_addr, val); - if (err < 0) - return err; - - return count; -} - -static MOST_DCI_RO_ATTR(ni_state); -static MOST_DCI_RO_ATTR(packet_bandwidth); -static MOST_DCI_RO_ATTR(node_address); -static MOST_DCI_RO_ATTR(node_position); -static MOST_DCI_ATTR(mep_filter); -static MOST_DCI_ATTR(mep_hash0); -static MOST_DCI_ATTR(mep_hash1); -static MOST_DCI_ATTR(mep_hash2); -static MOST_DCI_ATTR(mep_hash3); -static MOST_DCI_ATTR(mep_eui48_hi); -static MOST_DCI_ATTR(mep_eui48_mi); -static MOST_DCI_ATTR(mep_eui48_lo); - -/** - * most_dci_def_attrs - array of default attribute files of the dci object - */ -static struct attribute *most_dci_def_attrs[] = { - &most_dci_attr_ni_state.attr, - &most_dci_attr_packet_bandwidth.attr, - &most_dci_attr_node_address.attr, - &most_dci_attr_node_position.attr, - &most_dci_attr_mep_filter.attr, - &most_dci_attr_mep_hash0.attr, - &most_dci_attr_mep_hash1.attr, - &most_dci_attr_mep_hash2.attr, - &most_dci_attr_mep_hash3.attr, - &most_dci_attr_mep_eui48_hi.attr, - &most_dci_attr_mep_eui48_mi.attr, - &most_dci_attr_mep_eui48_lo.attr, - NULL, -}; - -/** - * DCI ktype - */ -static struct kobj_type most_dci_ktype = { - .sysfs_ops = &most_dci_sysfs_ops, - .release = most_dci_release, - .default_attrs = most_dci_def_attrs, -}; - -/** - * create_most_dci_obj - allocates a dci object - * @parent: parent kobject - * - * This creates a dci object and registers it with sysfs. - * Returns a pointer to the object or NULL when something went wrong. - */ -static struct -most_dci_obj *create_most_dci_obj(struct kobject *parent) -{ - struct most_dci_obj *most_dci; - int retval; - - most_dci = kzalloc(sizeof(*most_dci), GFP_KERNEL); - if (!most_dci) - return NULL; - - retval = kobject_init_and_add(&most_dci->kobj, &most_dci_ktype, parent, - "dci"); - if (retval) { - kobject_put(&most_dci->kobj); - return NULL; - } - return most_dci; -} - -/** - * destroy_most_dci_obj - DCI object release function - * @p: pointer to dci object - */ -static void destroy_most_dci_obj(struct most_dci_obj *p) -{ - kobject_put(&p->kobj); -} - -/** - * hdm_probe - probe function of USB device driver - * @interface: Interface of the attached USB device - * @id: Pointer to the USB ID table. - * - * This allocates and initializes the device instance, adds the new - * entry to the internal list, scans the USB descriptors and registers - * the interface with the core. - * Additionally, the DCI objects are created and the hardware is sync'd. - * - * Return 0 on success. In case of an error a negative number is returned. - */ -static int -hdm_probe(struct usb_interface *interface, const struct usb_device_id *id) -{ - unsigned int i; - unsigned int num_endpoints; - struct most_channel_capability *tmp_cap; - struct most_dev *mdev; - struct usb_device *usb_dev; - struct device *dev; - struct usb_host_interface *usb_iface_desc; - struct usb_endpoint_descriptor *ep_desc; - int ret = 0; - int err; - - usb_iface_desc = interface->cur_altsetting; - usb_dev = interface_to_usbdev(interface); - dev = &usb_dev->dev; - mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); - if (!mdev) - goto exit_ENOMEM; - - usb_set_intfdata(interface, mdev); - num_endpoints = usb_iface_desc->desc.bNumEndpoints; - mutex_init(&mdev->io_mutex); - INIT_WORK(&mdev->poll_work_obj, wq_netinfo); - setup_timer(&mdev->link_stat_timer, link_stat_timer_handler, - (unsigned long)mdev); - - mdev->usb_device = usb_dev; - mdev->link_stat_timer.expires = jiffies + (2 * HZ); - - mdev->iface.mod = hdm_usb_fops.owner; - mdev->iface.interface = ITYPE_USB; - mdev->iface.configure = hdm_configure_channel; - mdev->iface.request_netinfo = hdm_request_netinfo; - mdev->iface.enqueue = hdm_enqueue; - mdev->iface.poison_channel = hdm_poison_channel; - mdev->iface.description = mdev->description; - mdev->iface.num_channels = num_endpoints; - - snprintf(mdev->description, sizeof(mdev->description), - "usb_device %d-%s:%d.%d", - usb_dev->bus->busnum, - usb_dev->devpath, - usb_dev->config->desc.bConfigurationValue, - usb_iface_desc->desc.bInterfaceNumber); - - mdev->conf = kcalloc(num_endpoints, sizeof(*mdev->conf), GFP_KERNEL); - if (!mdev->conf) - goto exit_free; - - mdev->cap = kcalloc(num_endpoints, sizeof(*mdev->cap), GFP_KERNEL); - if (!mdev->cap) - goto exit_free1; - - mdev->iface.channel_vector = mdev->cap; - mdev->iface.priv = NULL; - - mdev->ep_address = - kcalloc(num_endpoints, sizeof(*mdev->ep_address), GFP_KERNEL); - if (!mdev->ep_address) - goto exit_free2; - - mdev->anchor_list = - kcalloc(num_endpoints, sizeof(*mdev->anchor_list), GFP_KERNEL); - if (!mdev->anchor_list) - goto exit_free3; - - tmp_cap = mdev->cap; - for (i = 0; i < num_endpoints; i++) { - ep_desc = &usb_iface_desc->endpoint[i].desc; - mdev->ep_address[i] = ep_desc->bEndpointAddress; - mdev->padding_active[i] = false; - mdev->is_channel_healthy[i] = true; - - snprintf(&mdev->suffix[i][0], MAX_SUFFIX_LEN, "ep%02x", - mdev->ep_address[i]); - - tmp_cap->name_suffix = &mdev->suffix[i][0]; - tmp_cap->buffer_size_packet = MAX_BUF_SIZE; - tmp_cap->buffer_size_streaming = MAX_BUF_SIZE; - tmp_cap->num_buffers_packet = BUF_CHAIN_SIZE; - tmp_cap->num_buffers_streaming = BUF_CHAIN_SIZE; - tmp_cap->data_type = MOST_CH_CONTROL | MOST_CH_ASYNC | - MOST_CH_ISOC_AVP | MOST_CH_SYNC; - if (ep_desc->bEndpointAddress & USB_DIR_IN) - tmp_cap->direction = MOST_CH_RX; - else - tmp_cap->direction = MOST_CH_TX; - tmp_cap++; - INIT_LIST_HEAD(&mdev->anchor_list[i]); - spin_lock_init(&mdev->anchor_list_lock[i]); - err = drci_wr_reg(usb_dev, - DRCI_REG_BASE + DRCI_COMMAND + - ep_desc->bEndpointAddress * 16, - 1); - if (err < 0) - pr_warn("DCI Sync for EP %02x failed", - ep_desc->bEndpointAddress); - } - dev_notice(dev, "claimed gadget: Vendor=%4.4x ProdID=%4.4x Bus=%02x Device=%02x\n", - le16_to_cpu(usb_dev->descriptor.idVendor), - le16_to_cpu(usb_dev->descriptor.idProduct), - usb_dev->bus->busnum, - usb_dev->devnum); - - dev_notice(dev, "device path: /sys/bus/usb/devices/%d-%s:%d.%d\n", - usb_dev->bus->busnum, - usb_dev->devpath, - usb_dev->config->desc.bConfigurationValue, - usb_iface_desc->desc.bInterfaceNumber); - - mdev->parent = most_register_interface(&mdev->iface); - if (IS_ERR(mdev->parent)) { - ret = PTR_ERR(mdev->parent); - goto exit_free4; - } - - mutex_lock(&mdev->io_mutex); - if (le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_INIC) { - /* this increments the reference count of the instance - * object of the core - */ - mdev->dci = create_most_dci_obj(mdev->parent); - if (!mdev->dci) { - mutex_unlock(&mdev->io_mutex); - most_deregister_interface(&mdev->iface); - ret = -ENOMEM; - goto exit_free4; - } - - kobject_uevent(&mdev->dci->kobj, KOBJ_ADD); - mdev->dci->usb_device = mdev->usb_device; - } - mutex_unlock(&mdev->io_mutex); - return 0; - -exit_free4: - kfree(mdev->anchor_list); -exit_free3: - kfree(mdev->ep_address); -exit_free2: - kfree(mdev->cap); -exit_free1: - kfree(mdev->conf); -exit_free: - kfree(mdev); -exit_ENOMEM: - if (ret == 0 || ret == -ENOMEM) { - ret = -ENOMEM; - dev_err(dev, "out of memory\n"); - } - return ret; -} - -/** - * hdm_disconnect - disconnect function of USB device driver - * @interface: Interface of the attached USB device - * - * This deregisters the interface with the core, removes the kernel timer - * and frees resources. - * - * Context: hub kernel thread - */ -static void hdm_disconnect(struct usb_interface *interface) -{ - struct most_dev *mdev; - - mdev = usb_get_intfdata(interface); - mutex_lock(&mdev->io_mutex); - usb_set_intfdata(interface, NULL); - mdev->usb_device = NULL; - mutex_unlock(&mdev->io_mutex); - - del_timer_sync(&mdev->link_stat_timer); - cancel_work_sync(&mdev->poll_work_obj); - - destroy_most_dci_obj(mdev->dci); - most_deregister_interface(&mdev->iface); - - kfree(mdev->anchor_list); - kfree(mdev->cap); - kfree(mdev->conf); - kfree(mdev->ep_address); - kfree(mdev); -} - -static struct usb_driver hdm_usb = { - .name = "hdm_usb", - .id_table = usbid, - .probe = hdm_probe, - .disconnect = hdm_disconnect, -}; - -static int __init hdm_usb_init(void) -{ - pr_info("hdm_usb_init()\n"); - if (usb_register(&hdm_usb)) { - pr_err("could not register hdm_usb driver\n"); - return -EIO; - } - schedule_usb_work = create_workqueue("hdmu_work"); - if (!schedule_usb_work) { - pr_err("could not create workqueue\n"); - usb_deregister(&hdm_usb); - return -ENOMEM; - } - return 0; -} - -static void __exit hdm_usb_exit(void) -{ - pr_info("hdm_usb_exit()\n"); - destroy_workqueue(schedule_usb_work); - usb_deregister(&hdm_usb); -} - -module_init(hdm_usb_init); -module_exit(hdm_usb_exit); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Christian Gromm <christian.gromm@microchip.com>"); -MODULE_DESCRIPTION("HDM_4_USB"); |