diff options
| -rw-r--r-- | AUTHORS | 2 | ||||
| -rw-r--r-- | COPYING | 340 | ||||
| -rw-r--r-- | ChangeLog | 1 | ||||
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | NEWS | 0 | ||||
| -rw-r--r-- | README | 9 | ||||
| -rw-r--r-- | configure.ac | 13 | ||||
| -rw-r--r-- | mtac.c | 460 | ||||
| -rw-r--r-- | mtac.h | 95 |
9 files changed, 925 insertions, 0 deletions
@@ -0,0 +1,2 @@ +James Maki <jmaki@multitech.com> +John Klug <john.klug@multitech.com> @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. 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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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/ChangeLog b/ChangeLog new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/ChangeLog @@ -0,0 +1 @@ + diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..1472a75 --- /dev/null +++ b/Makefile @@ -0,0 +1,5 @@ +obj-m := mtac.o + +clean: + rm -f *.ko *.o + @@ -0,0 +1,9 @@ +This is the kernel module that is used to +keep track of mtac cards installed on the +system, and a set of functions for building +MTAC modules. + +An init script can look in: +/lib/modules/$(uname -r)/extra/mtac_*.ko + +to decide what to load. diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..4396685 --- /dev/null +++ b/configure.ac @@ -0,0 +1,13 @@ +AC_INIT([mts-io], [1.0.0]) +AM_INIT_AUTOMAKE +AM_CONFIG_HEADER([config.h]) + +AC_PROG_CC +AC_PROG_CXX +AC_PROG_INSTALL +AC_PROG_MAKE_SET + +AC_HEADER_STDC + +AC_DEFINE([DEBUG], 0, [set to 1 to enable debug]) + @@ -0,0 +1,460 @@ +#define DRIVER_VERSION "v1.0.0" +#define DRIVER_AUTHOR "John Klug <john.klug@multitech.com>" +#define DRIVER_DESC "MTS driver to supervise MTAC slots" +#define DRIVER_NAME "mtac-slots" +/* #define DEBUG 1 */ + +#include <linux/types.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/kmod.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/mts_io.h> + +#include "mtac.h" + +/* accessory card EEPROMs, read outside of driver */ +extern uint8_t mts_ap_eeprom[NUM_AP][512]; + +/* info for accessory port (contains function pointers for setup and teardown, + * gpio pin list for the device inserted into the port. */ +struct ap_info* mtac_port_info[NUM_AP]; +EXPORT_SYMBOL(mtac_port_info); /* Formerly port_info */ + +/* Protect the mtac port info structure */ +DEFINE_MUTEX(mtac_mutex); +EXPORT_SYMBOL(mtac_mutex); + +void mtac_clear_port_pins(int port_index) +{ + char buf[32]; + struct gpio_pin *pin; + struct gpio_pin *pins; + + snprintf(buf,sizeof buf,"AP%d_",port_index+1); + + /* Find all the GPIO pins for this port and + * free them all. + */ + log_debug("mtac_clear_port_pins: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + pins = mtac_port_info[port_index]->gpio_pins; + for (pin = pins; *pin->name; pin++) { + if (!memcmp(pin->name,buf,strlen(buf))) { + gpio_free(pin->pin.gpio); + } + } + mtac_port_info[port_index]->gpio_pins = NULL; + log_debug("Unlock mtac_mutex"); + mutex_unlock(&mtac_mutex); +} +EXPORT_SYMBOL(mtac_clear_port_pins); + +void mtac_set_port_pins(int port_index, struct gpio_pin *pins, struct kobject *subdir) +{ + log_debug("mtac_set_port_pins: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mtac_port_info[port_index]->gpio_pins = pins; + mtac_port_info[port_index]->subdirs = subdir; +} +EXPORT_SYMBOL(mtac_set_port_pins); + +struct kobj_attribute* mtac_create_attribute(const char* _name, umode_t _mode) { + char* attr_name; + struct kobj_attribute* _attr; + + _attr = kzalloc(sizeof(struct kobj_attribute), GFP_KERNEL); + if (! _attr) { + log_error("kzalloc of attribute [%s] failed", _name); + return NULL; + } + sysfs_attr_init(_attr); + attr_name = kstrdup(_name, GFP_KERNEL); + if (! attr_name) { + log_error("GFP_KERNEL dup failed for attribute [%s]", _name); + return NULL; + } + _attr->attr.name = attr_name; + _attr->attr.mode = _mode; + + return _attr; +} +EXPORT_SYMBOL(mtac_create_attribute); + +int mtac_port_from_kobject(struct kobject *kobj) { + int port; + const char *name; + + name = kobj->name; + if (! name) { + log_error("kobject->name is NULL"); + return -1; + } + + if (sscanf(name, "ap%d", &port) < 1) { + log_error("failed to scan port from kobject->name [%s]", name); + return -1; + } + + if (port < 1 || port > NUM_AP) { + log_error("port number %d is invalid", port); + return -1; + } + + return port; +} +EXPORT_SYMBOL(mtac_port_from_kobject); + + +/* +* This function is not normally used directly by mtac modules. +*/ +ssize_t mtac_show_product_info(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { + ssize_t value; + int port; + int port_index; + struct mts_ap_eeprom_layout *app; + + port = mtac_port_from_kobject(kobj); + if (port < 1) { + log_error("mtac_port_from_kobject returned %d", port); + return -1; + } + port_index = port - 1; + + app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index]; + if (! strcmp(attr->attr.name, "vendor-id")) { + value = snprintf(buf, 32, "%s\n", app->vendor_id); + } else if (! strcmp(attr->attr.name, "product-id")) { + value = snprintf(buf, 32, "%s\n", app->product_id); + } else if (! strcmp(attr->attr.name, "device-id")) { + value = snprintf(buf, 32, "%s\n", app->device_id); + } else if (! strcmp(attr->attr.name, "hw-version")) { + value = snprintf(buf, 32, "%s\n", app->hw_version); + } else { + log_error("attribute [%s] not found", attr->attr.name); + value = -1; + } + return value; +} +EXPORT_SYMBOL(mtac_show_product_info); + +bool mtac_add_product_info_attributes(int port, struct attribute** attrs, int* index) { + char buf[32]; + struct kobj_attribute* kobj_attr; + + sprintf(buf, "vendor-id"); + kobj_attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! kobj_attr) { + log_error("failed to create attribute [%s] in port %d", buf, port); + return false; + } + kobj_attr->show = mtac_show_product_info; + attrs[(*index)++] = &kobj_attr->attr; + + sprintf(buf, "product-id"); + kobj_attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! kobj_attr) { + log_error("failed to create attribute [%s] in port %d", buf, port); + return false; + } + kobj_attr->show = mtac_show_product_info; + attrs[(*index)++] = &kobj_attr->attr; + + sprintf(buf, "device-id"); + kobj_attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! kobj_attr) { + log_error("failed to create attribute [%s] in port %d", buf, port); + return false; + } + kobj_attr->show = mtac_show_product_info; + attrs[(*index)++] = &kobj_attr->attr; + + sprintf(buf, "hw-version"); + kobj_attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! kobj_attr) { + log_error("failed to create attribute [%s] in port %d", buf, port); + return false; + } + kobj_attr->show = mtac_show_product_info; + attrs[(*index)++] = &kobj_attr->attr; + + return true; +} +EXPORT_SYMBOL(mtac_add_product_info_attributes); + + +/* +* This function is not normally used directly by mtac modules. +*/ +struct gpio_pin *mtac_gpio_pin_by_attr_name(const char *name, int port) { + struct gpio_pin *pin; + char *pin_attr_name; + int port_index = port - 1; + struct gpio_pin *port_gpio_pins; + + log_debug("mtac_gpio_pin_by_attr_name: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + pin_attr_name = mtac_port_info[port_index]->gpio_pin_name_by_attr_name(name, port); + port_gpio_pins = mtac_port_info[port_index]->gpio_pins; + + for (pin = port_gpio_pins; *pin->name; pin++) { + if (!strcmp(pin->pin.label, pin_attr_name)) { + mutex_unlock(&mtac_mutex); + return pin; + } + } + mutex_unlock(&mtac_mutex); + + log_error("pin with attr name [%s] not found", name); + return NULL; +} +EXPORT_SYMBOL(mtac_gpio_pin_by_attr_name); + +ssize_t mtac_attr_show_ap_gpio_pin(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + int value; + int port; + struct gpio_pin *pin; + + port = mtac_port_from_kobject(kobj); + if (port < 1) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + + pin = mtac_gpio_pin_by_attr_name(attr->attr.name, port); + if (!pin) { + return -ENODEV; + } + + log_debug("mtac_attr_show_ap_gpio_pin: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + + value = gpio_get_value(pin->pin.gpio); + + mutex_unlock(&mtac_mutex); + + if (value < 0) { + return value; + } + + if (pin->active_low) { + value = !value; + } + + return sprintf(buf, "%d\n", value); +} +EXPORT_SYMBOL(mtac_attr_show_ap_gpio_pin); + + +ssize_t mtac_attr_store_ap_gpio_pin(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + int value; + int port; + struct gpio_pin *pin; + + port = mtac_port_from_kobject(kobj); + if (port < 1) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + + pin = mtac_gpio_pin_by_attr_name(attr->attr.name, port); + if (!pin) { + return -ENODEV; + } + + if (sscanf(buf, "%i", &value) != 1) { + return -EINVAL; + } + + if (pin->active_low) { + value = !value; + } + + log_debug("mtac_attr_store_ap_gpio_pin: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + + gpio_set_value(pin->pin.gpio, value); + + mutex_unlock(&mtac_mutex); + + return count; +} +EXPORT_SYMBOL(mtac_attr_store_ap_gpio_pin); + +static void display_port(int port_index) { + int port = port_index + 1; + struct mts_ap_eeprom_layout *app; + + + /* Our caller has locked the mtac_mutex */ + if((*(int *)(&mtac_mutex.count)) != 0) { + log_error("Must always hold the mtac_mutex here, count is %d not 0",(*(int *)(&mtac_mutex.count))); + } + + app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index]; + + log_info("accessory card %d vendor-id: %.32s", port, app->vendor_id); + log_info("accessory card %d product-id: %.32s", port, app->product_id); + log_info("accessory card %d device-id: %.32s", port, app->device_id); + log_info("accessory card %d hw-version: %.32s", port, app->hw_version); +} + +static void acquire_gpio(struct gpio_pin *pins, int port_index) +{ + char buf[32]; + struct gpio_pin *pin; + int ret; + + snprintf(buf,sizeof buf,"AP%d_",port_index+1); + for (pin = pins; *pin->name; pin++) { + if (!memcmp(pin->name,buf,strlen(buf))) { + log_debug("Request name:%s label: %s pin: %d", pin->name, pin->pin.label, pin->pin.gpio); + ret = gpio_request_one(pin->pin.gpio, pin->pin.flags, pin->pin.label); + if (ret) + log_debug("could not request pin %s (%d) but it could have already been requested under a different pin name", pin->name, ret); + } + } +} + +#include <linux/delay.h> + +struct gpio_pin *mtac_gpio_pin_by_name(const char *name, int port_index) { + struct gpio_pin *pin; + + log_debug("mtac_gpio_pin_by_name: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + for (pin = mtac_port_info[port_index]->gpio_pins; *pin->name; pin++) { + if (!strcmp(pin->name, name)) { + mutex_unlock(&mtac_mutex); + return pin; + } + } + mutex_unlock(&mtac_mutex); + + log_error("pin named %s not found", name); + + return NULL; +} +EXPORT_SYMBOL(mtac_gpio_pin_by_name); + + +/* static gpio_pins */ +// A GPIO pin number must only occur once. +struct gpio_pin *mtac_gpio_pin_by_num(unsigned num, int port_index) { + int ipin = 0; + struct gpio_pin *port_gpio_pins; + + log_debug("mtac_gpio_pin_by_num: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + port_gpio_pins = mtac_port_info[port_index]->gpio_pins; + while(*(port_gpio_pins[ipin].name)) { + if (port_gpio_pins[ipin].pin.gpio == num) { + mutex_unlock(&mtac_mutex); + return &(port_gpio_pins[ipin]); + } + ipin++; + } + mutex_unlock(&mtac_mutex); + log_error("pin numbered %u not found", num); + + return NULL; +} +EXPORT_SYMBOL(mtac_gpio_pin_by_num); + +/* +* Depends on static gpio_pins +*/ +int mtac_find(void(*set_info)(struct ap_info* info), const char *target_product_id) +{ + int port_index; + struct mts_ap_eeprom_layout *app; + int slot_count = 0; + + for (port_index = 0; port_index < NUM_AP; port_index++) { + log_debug("mtac_find: State of mtac mutex is %d",(*(int *)(&mtac_mutex.count))); + mutex_lock(&mtac_mutex); + if (mtac_port_info[port_index] != NULL) { + log_debug("Accessory Port %d of %d is in use",port_index+1,NUM_AP); + mutex_unlock(&mtac_mutex); + continue; + } + app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index]; + log_debug("target_product_id=%s, eeprom=%s",target_product_id,app->product_id); + if (mts_ap_eeprom[port_index][0] == 0xFF) { + log_info("uninitialized eeprom on accessory card %d", port_index); + mutex_unlock(&mtac_mutex); + continue; + } else if (mts_ap_eeprom[port_index][0] == 0x0) { + log_debug("no accessory card inserted in port %d", port_index); + mutex_unlock(&mtac_mutex); + continue; + } else if (strstr(app->product_id, target_product_id)) { + log_debug("strstr matches"); + mtac_port_info[port_index] = kzalloc(sizeof(struct ap_info), GFP_KERNEL); + if (! mtac_port_info[port_index]) { + log_error("alloc of port info failed"); + mutex_unlock(&mtac_mutex); + return -ENOSPC; + } + set_info(mtac_port_info[port_index]); + if (! mtac_port_info[port_index]->setup(port_index+1)) { + log_error("accessory port %d setup failed", port_index+1); + mtac_port_info[port_index]->teardown(port_index+1); + kfree(mtac_port_info[port_index]); + mtac_port_info[port_index] = NULL; + mutex_unlock(&mtac_mutex); + return -ENOSPC; + } else { + acquire_gpio(mtac_port_info[port_index]->gpio_pins,port_index); + slot_count++; + log_debug("slot_count=%d",slot_count); + } + } else + log_debug("len prod_id: %d eeprom pr id: %d",strlen(target_product_id),strlen(app->product_id)); + mutex_unlock(&mtac_mutex); + } + return slot_count; +} +EXPORT_SYMBOL(mtac_find); + +/* +* Display the EEPROM for all the slots. +*/ +static int __init mtac_init(void) +{ + int port_index; + + log_debug("init: " DRIVER_VERSION); + mutex_lock(&mtac_mutex); + for (port_index = 0; port_index < NUM_AP; port_index++) { + if (mts_ap_eeprom[port_index][0] == 0xFF) + log_alert("uninitialized eeprom on accessory card %d", port_index); + else if (mts_ap_eeprom[port_index][0] == 0x0) + log_info("no accessory card inserted in port %d", port_index+1); + else + display_port(port_index); + } + mutex_unlock(&mtac_mutex); + + return 0; +} + +/* We can only tear down our own device */ +static void __exit mtac_exit(void) +{ + log_info("exiting"); +} +module_init(mtac_init); +module_exit(mtac_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL"); @@ -0,0 +1,95 @@ +#ifndef IO_MODULE_MTAC_H_ +#define IO_MODULE_MTAC_H_ + +// NUM_AP should be defined from the board code +// it should be set to the value of CONFIG_MTS_NUM_ACCESSORY_PORTS +// arch/arm/mach-at91/board-dt-sam9.c +// if it is 0 or undefined, there is no accessory card support on this HW +#ifdef CONFIG_MTS_NUM_ACCESSORY_PORTS + +#ifndef NUM_AP +#define NUM_AP CONFIG_MTS_NUM_ACCESSORY_PORTS +#endif + +#else +#define NUM_AP 0 +#endif + + +#define PRODUCT_ID_MTAC_GPIOB "MTAC-GPIOB" +#define PRODUCT_ID_MTAC_MFSER "MTAC-MFSER" +#define PRODUCT_ID_MTAC_ETH "MTAC-ETH" +#define PRODUCT_ID_MTAC_LORA "MTAC-LORA" +#define PRODUCT_ID_MTAC_PULSE "MTAC-PULSE" +#define PRODUCT_ID_MTAC_XDOT "MTAC-XDOT" + + +#define DEBUG 1 + +/* Hardware version must be fewer characters than hw_version + in struct mts_ap_eeprom_layout */ +/* MTAC-LORA with native SPI or FTDI FT4222 */ +#define HW_VERSION_MTAC_LORA_0_0 "MTAC-LORA-0.0" +/* MTAC-LORA2 with FTDI FT232H */ +#define HW_VERSION_MTAC_LORA_1_0 "MTAC-LORA-1.0" +#define HW_VERSION_MTAC_LORA_1_1 "MTAC-LORA-1.1" +#define HW_VERSION_MTAC_LORA_1_5 "MTAC-LORA-1.5" +/* Code assumes CRESET/CDONE (SPI programming) cases will not + * exactly match MTAC-LORA-0.0, 1.0, or 1.1. Also levels before + * 1.5 must be the same length. + */ + +enum { + MTAC_NONE, + MTAC_GPIOB_0_0, + MTAC_MFSER_0_0, + MTAC_ETH_0_0, + MTAC_LORA_0_0, + MTAC_LORA_1_0, + MTAC_LORA_1_1, + MTAC_LORA_1_5, + MTAC_PULSE_1_0, + MTAC_XDOT_0_0, +}; + +enum ap { + port_1 = 1, + port_2, +}; + +// info for accessory port +// contains function pointers for setup and teardown and useful info +// each type of accessory card should have one of these +struct ap_info { + char product_id[32]; + bool (*setup)(enum ap port); + bool (*teardown)(enum ap port); + char* (*gpio_pin_name_by_attr_name)(const char* name, int port); + struct gpio_pin *gpio_pins; + struct kobject *subdirs; + struct attribute_group attr_group; +}; + +extern struct platform_device *mts_io_platform_device; + +extern uint8_t mts_ap_eeprom[NUM_AP][512]; +extern struct mutex mtac_mutex; + +extern void mtac_clear_port_pins(int port_index); +extern void mtac_set_port_pins(int port_index, struct gpio_pin *pins, struct kobject *subdir); +extern struct kobj_attribute* mtac_create_attribute(const char* _name, umode_t _mode); +extern int mtac_port_from_kobject(struct kobject *kobj); +extern ssize_t mtac_show_product_info(struct kobject *kobj, struct kobj_attribute *attr, char *buf); +extern bool mtac_add_product_info_attributes(int port, struct attribute** attrs, int* index); +extern struct gpio_pin *mtac_gpio_pin_by_attr_name(const char *name, int port); +extern ssize_t mtac_attr_show_ap_gpio_pin(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf); +extern ssize_t mtac_attr_store_ap_gpio_pin(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count); +extern struct gpio_pin *mtac_gpio_pin_by_num(unsigned num, int port_index); +extern struct gpio_pin *mtac_gpio_pin_by_name(const char *name, int port_index); +extern void mtac_clear_port_pins(int port_index); +extern int mtac_find(void(*set_info)(struct ap_info* info), const char *target_product_id); +extern struct ap_info *mtac_port_info[]; +#endif /* IO_MODULE_MTAC_H_ */ |