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Markus Koch 2018-11-01 22:39:54 +01:00
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*.o
*.ko
*.mod.c
*.cmd
.tmp_versions
*.pro.user
modules.order
Module.symvers

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[submodule "linuxconsole"]
path = linuxconsole
url = https://git.code.sf.net/p/linuxconsole/code

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11
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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

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# 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.

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/*
*
* FS-iA6B iBus RC receiver kernel driver
* Copyright (C) 2018 Markus Koch <markus@notsyncing.net>
*
* 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 <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/slab.h>
#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 <markus@notsyncing.net>");
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)

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fsia6b.pro Normal file
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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

1
linuxconsole Submodule

@ -0,0 +1 @@
Subproject commit 4b9bec3dfce6d89be6aa95cb70bd0d330e7263a7

34
patches/linuxconsole-0001-Add-support-for-the-FS-iA6B-receiver.patch Normal file
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From 30f59fe395be659fc1b1af774e8e7dd69cd55b69 Mon Sep 17 00:00:00 2001
From: Markus Koch <markus@notsyncing.net>
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