From 642409779c4d4d18f87694d4b7c8ba403cb13ddb Mon Sep 17 00:00:00 2001 From: Markus Koch Date: Thu, 1 Nov 2018 22:39:54 +0100 Subject: [PATCH] Initial commit --- .gitignore | 8 + .gitmodules | 3 + LICENSE.txt | 339 ++++++++++++++++++ Makefile | 11 + README.MD | 15 + fsia6b.c | 223 ++++++++++++ fsia6b.pro | 9 + linuxconsole | 1 + ...Add-support-for-the-FS-iA6B-receiver.patch | 34 ++ 9 files changed, 643 insertions(+) create mode 100644 .gitignore create mode 100644 .gitmodules create mode 100644 LICENSE.txt create mode 100644 Makefile create mode 100644 README.MD create mode 100644 fsia6b.c create mode 100644 fsia6b.pro create mode 160000 linuxconsole create mode 100644 patches/linuxconsole-0001-Add-support-for-the-FS-iA6B-receiver.patch diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..bdf26a5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,8 @@ +*.o +*.ko +*.mod.c +*.cmd +.tmp_versions +*.pro.user +modules.order +Module.symvers diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..5704036 --- /dev/null +++ b/.gitmodules @@ -0,0 +1,3 @@ +[submodule "linuxconsole"] + path = linuxconsole + url = https://git.code.sf.net/p/linuxconsole/code diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100644 index 0000000..d159169 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, 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. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..0c9e39a --- /dev/null +++ b/Makefile @@ -0,0 +1,11 @@ +obj-m := fsia6b.o +KDIR := /lib/modules/$(shell uname -r)/build +PWD := $(shell pwd) +default: fsia6b.ko +fsia6b.ko: fsia6b.c + $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules + +clean: + rm -f ./*.o ./*.ko ./*.mod.c modules.order Module.symvers + +.phony: deploy clean diff --git a/README.MD b/README.MD new file mode 100644 index 0000000..6d38c94 --- /dev/null +++ b/README.MD @@ -0,0 +1,15 @@ +# FS-iA6B iBus RC receiver +Kernel driver and support software to use a FlySky FS-iA6B 14-channel RC receiver as a general purpose game controller in Linux. + +## Build instructions +* Use `make` to compile the kernel module +* Make sure to clone all submodules: `git submodule init && git submodule update` +* Apply the patches from the `patches` directory +* Compile the linuxconsole utils `cd linuxconsole; make` + +## Usage instructions +* Modprobe `serio` and `fsia6b` +* Run 'linuxconsole/utils/inputattach --fsia6b /dev/ttyUSB1' + +# Known issues +* Very hacky code. The controller type ID is hardcoded to 100; should be moved to serio header. diff --git a/fsia6b.c b/fsia6b.c new file mode 100644 index 0000000..09dbc60 --- /dev/null +++ b/fsia6b.c @@ -0,0 +1,223 @@ +/* + * + * FS-iA6B iBus RC receiver kernel driver + * Copyright (C) 2018 Markus Koch + * + * 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. + * + */ + +#include +#include +#include +#include +#include + +#define SERIO_FSIA6B 100 /* TODO: This should be moved to the serio header */ + +#define DRIVER_DESC "FS-iA6B iBus RC receiver" + +MODULE_AUTHOR("Markus Koch "); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +#define IBUS_SERVO_COUNT 14 +#define IBUS_SWITCH_OFFSET 6 + +static int fsia6b_axes[IBUS_SERVO_COUNT] = { + ABS_X, ABS_Y, + ABS_Z, ABS_RX, + ABS_RY, ABS_RZ, + ABS_HAT0X, ABS_HAT0Y, + ABS_HAT1X, ABS_HAT1Y, + ABS_HAT2X, ABS_HAT2Y, + ABS_HAT3X, ABS_HAT3Y +}; + +enum ibus_state {SYNC, COLLECT, PROCESS}; + +struct ibus_packet { + enum ibus_state state; + + int offset; + uint16_t ibuf; + uint16_t channel[IBUS_SERVO_COUNT]; +}; + +struct fsia6b { + struct input_dev *dev; + struct ibus_packet packet; + + char phys[32]; +}; + +static void fsia6b_serio_write_wakeup(struct serio *serio) +{ + struct fsia6b *fsia6b = serio_get_drvdata(serio); + printk(KERN_INFO "fsia6b: write wakeup.\n"); +} + +static irqreturn_t fsia6b_serio_irq(struct serio *serio, + unsigned char data, unsigned int flags) +{ + struct fsia6b *fsia6b = serio_get_drvdata(serio); + int i; + + fsia6b->packet.ibuf = (data << 8) | ((fsia6b->packet.ibuf >> 8) & 0xFF); + + switch (fsia6b->packet.state) { + case SYNC: + if (fsia6b->packet.ibuf == 0x4020) { + fsia6b->packet.state = COLLECT; + } + break; + + case COLLECT: + fsia6b->packet.state = PROCESS; + break; + + case PROCESS: + fsia6b->packet.channel[fsia6b->packet.offset] = fsia6b->packet.ibuf; + fsia6b->packet.offset++; + + if (fsia6b->packet.offset == IBUS_SERVO_COUNT) { + fsia6b->packet.offset = 0; + fsia6b->packet.state = SYNC; + for (i = 0; i < IBUS_SERVO_COUNT; ++i) { + input_report_abs(fsia6b->dev, fsia6b_axes[i], + fsia6b->packet.channel[i]); + if (i >= IBUS_SWITCH_OFFSET) { + input_report_key(fsia6b->dev, BTN_1 + i*1, + (fsia6b->packet.channel[i] > 1900)); + } + } + input_sync(fsia6b->dev); + } else { + fsia6b->packet.state = COLLECT; + } + break; + } + + return IRQ_HANDLED; +} + +int fsia6b_init_device(struct fsia6b *fsia6b) +{ + printk(KERN_INFO "fsia6b: init.\n"); + return 0; +} + +static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv) +{ + struct fsia6b *fsia6b; + struct input_dev *input_dev; + int err; + int i; + + printk(KERN_INFO "fsia6b: connect.\n"); + + fsia6b = kzalloc(sizeof(struct fsia6b), GFP_KERNEL); + if (!fsia6b) + return -ENOMEM; + + fsia6b->packet.ibuf = 0; + fsia6b->packet.offset = 0; + fsia6b->packet.state = SYNC; + + serio_set_drvdata(serio, fsia6b); + + err = serio_open(serio, drv); + if (err) + goto fail1; + + + input_dev = input_allocate_device(); + err = -ENODEV; + if (!input_dev) + goto fail2; + fsia6b->dev = input_dev; + + snprintf(fsia6b->phys, sizeof(fsia6b->phys), "%s/input0", serio->phys); + + input_dev->name = DRIVER_DESC; + input_dev->phys = fsia6b->phys; + input_dev->id.bustype = BUS_RS232; + input_dev->id.vendor = SERIO_FSIA6B; + input_dev->id.product = serio->id.id; + input_dev->id.version = 0x0100; + input_dev->dev.parent = &serio->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + + for (i = 0; i < IBUS_SERVO_COUNT; ++i) { + input_set_abs_params(input_dev, fsia6b_axes[i], 1000, 2000, 2, 2); + if (i >= IBUS_SWITCH_OFFSET) { + input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1 + i); + } + } + + err = input_register_device(fsia6b->dev); + if (err) + goto fail2; + + err = fsia6b_init_device(fsia6b); + if (err) + goto fail3; + + return 0; + + fail3: input_free_device(input_dev); + fail2: serio_close(serio); + fail1: serio_set_drvdata(serio, NULL); + kfree(fsia6b); + return err; +} + +static void fsia6b_serio_disconnect(struct serio *serio) +{ + struct fsia6b *fsia6b = serio_get_drvdata(serio); + + printk(KERN_INFO "fsia6b: disconnect.\n"); + + serio_close(serio); + serio_set_drvdata(serio, NULL); + input_unregister_device(fsia6b->dev); + kfree(fsia6b); +} + +static const struct serio_device_id fsia6b_serio_ids[] = { + { + .type = SERIO_RS232, + .proto = SERIO_FSIA6B, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(serio, fsia6b_serio_ids); + +struct serio_driver fsia6b_serio_drv = { + .driver = { + .name = "fsia6b" + }, + .description = DRIVER_DESC, + .id_table = fsia6b_serio_ids, + .write_wakeup = fsia6b_serio_write_wakeup, + .interrupt = fsia6b_serio_irq, + .connect = fsia6b_serio_connect, + .disconnect = fsia6b_serio_disconnect +}; + +module_serio_driver(fsia6b_serio_drv) diff --git a/fsia6b.pro b/fsia6b.pro new file mode 100644 index 0000000..d344be6 --- /dev/null +++ b/fsia6b.pro @@ -0,0 +1,9 @@ +TEMPLATE = app +CONFIG += console +CONFIG -= app_bundle +CONFIG -= qt + +INCLUDEPATH += /lib/modules/4.18.16-arch1-1-ARCH/build /lib/modules/4.18.16-arch1-1-ARCH/build/include /usr/include + +SOURCES += \ + fsia6b.c diff --git a/linuxconsole b/linuxconsole new file mode 160000 index 0000000..4b9bec3 --- /dev/null +++ b/linuxconsole @@ -0,0 +1 @@ +Subproject commit 4b9bec3dfce6d89be6aa95cb70bd0d330e7263a7 diff --git a/patches/linuxconsole-0001-Add-support-for-the-FS-iA6B-receiver.patch b/patches/linuxconsole-0001-Add-support-for-the-FS-iA6B-receiver.patch new file mode 100644 index 0000000..d75c4f7 --- /dev/null +++ b/patches/linuxconsole-0001-Add-support-for-the-FS-iA6B-receiver.patch @@ -0,0 +1,34 @@ +From 30f59fe395be659fc1b1af774e8e7dd69cd55b69 Mon Sep 17 00:00:00 2001 +From: Markus Koch +Date: Thu, 1 Nov 2018 22:23:40 +0100 +Subject: [PATCH] Add support for the FS-iA6B receiver + +--- + utils/inputattach.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/utils/inputattach.c b/utils/inputattach.c +index bdaafa33..3e266cf5 100644 +--- a/utils/inputattach.c ++++ b/utils/inputattach.c +@@ -774,6 +774,9 @@ static struct input_types input_types[] = { + { "--wacom_iv", "-wacom_iv", "Wacom protocol 4 tablet", + B9600, CS8 | CRTSCTS, + SERIO_WACOM_IV, 0x00, 0x00, 0, wacom_iv_init }, ++{ "--fsia6b", "-fsia6b", "FS-iA6B RC Receiver", ++ B115200, CS8, ++ 100, 0x00, 0x00, 0, NULL }, + { NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, NULL } + }; + +@@ -882,6 +885,7 @@ int main(int argc, char **argv) + case 9600: type->speed = B9600; break; + case 19200: type->speed = B19200; break; + case 38400: type->speed = B38400; break; ++ case 115200: type->speed = B115200; break; + default: + fprintf(stderr, "inputattach: invalid baud rate '%d'\n", + baud); +-- +2.19.1 +