mirror of
https://github.com/m42uko/linux-fsia6b.git
synced 2022-05-12 18:36:03 +02:00
Add proper support for switch layouts
Also, clean up the code somewhat.
This commit is contained in:
parent
3dd72431e3
commit
dcc9841d93
100
fsia6b.c
100
fsia6b.c
@ -1,7 +1,8 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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*
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* FS-iA6B iBus RC receiver kernel driver
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* Copyright (C) 2018 Markus Koch <markus@notsyncing.net>
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* Copyright (C) 2018 - 2019 Markus Koch <markus@notsyncing.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -18,11 +19,23 @@
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*
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*/
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/*
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* This driver will provide all 14 channels of the FlySky FS-ia6B RC receiver
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* as analog values.
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*
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* Additionally, the channels can be converted to discrete switch values.
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* By default, it is configured for the offical FS-i6 remote control.
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* If you use a different hardware configuration, you can configure it
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* using the `switch_config` parameter.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#define SERIO_FSIA6B 100 /* TODO: This should be moved to the serio header */
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@ -33,7 +46,11 @@ MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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#define IBUS_SERVO_COUNT 14
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#define IBUS_SWITCH_OFFSET 6
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static char *switch_config = "00000022320000";
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module_param(switch_config, charp, 0444);
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MODULE_PARM_DESC(switch_config,
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"Amount of switch positions per channel (14 characters, 0-3)");
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static int fsia6b_axes[IBUS_SERVO_COUNT] = {
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ABS_X, ABS_Y,
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@ -62,25 +79,20 @@ struct fsia6b {
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char phys[32];
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};
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static void fsia6b_serio_write_wakeup(struct serio *serio)
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{
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struct fsia6b *fsia6b = serio_get_drvdata(serio);
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printk(KERN_INFO "fsia6b: write wakeup.\n");
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}
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static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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unsigned char data, unsigned int flags)
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{
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struct fsia6b *fsia6b = serio_get_drvdata(serio);
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int i;
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int sw_state;
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int sw_id = BTN_0;
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fsia6b->packet.ibuf = (data << 8) | ((fsia6b->packet.ibuf >> 8) & 0xFF);
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switch (fsia6b->packet.state) {
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case SYNC:
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if (fsia6b->packet.ibuf == 0x4020) {
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if (fsia6b->packet.ibuf == 0x4020)
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fsia6b->packet.state = COLLECT;
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}
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break;
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case COLLECT:
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@ -88,7 +100,8 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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break;
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case PROCESS:
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fsia6b->packet.channel[fsia6b->packet.offset] = fsia6b->packet.ibuf;
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fsia6b->packet.channel[fsia6b->packet.offset] =
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fsia6b->packet.ibuf;
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fsia6b->packet.offset++;
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if (fsia6b->packet.offset == IBUS_SERVO_COUNT) {
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@ -97,9 +110,28 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) {
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input_report_abs(fsia6b->dev, fsia6b_axes[i],
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fsia6b->packet.channel[i]);
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if (i >= IBUS_SWITCH_OFFSET) {
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input_report_key(fsia6b->dev, BTN_1 + i*1,
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(fsia6b->packet.channel[i] > 1900));
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sw_state = 0;
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if (fsia6b->packet.channel[i] > 1900)
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sw_state = 1;
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else if (fsia6b->packet.channel[i] < 1100)
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sw_state = 2;
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switch (switch_config[i]) {
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case '3':
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input_report_key(fsia6b->dev,
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sw_id++,
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sw_state == 0);
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/* fall-through */
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case '2':
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input_report_key(fsia6b->dev,
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sw_id++,
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sw_state == 1);
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/* fall-through */
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case '1':
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input_report_key(fsia6b->dev,
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sw_id++,
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sw_state == 2);
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}
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}
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input_sync(fsia6b->dev);
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@ -112,20 +144,13 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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return IRQ_HANDLED;
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}
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int fsia6b_init_device(struct fsia6b *fsia6b)
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{
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printk(KERN_INFO "fsia6b: init.\n");
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return 0;
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}
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static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct fsia6b *fsia6b;
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struct input_dev *input_dev;
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int err;
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int i;
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printk(KERN_INFO "fsia6b: connect.\n");
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int i, j;
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int sw_id = BTN_0;
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fsia6b = kzalloc(sizeof(struct fsia6b), GFP_KERNEL);
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if (!fsia6b)
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@ -161,23 +186,33 @@ static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv)
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) {
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input_set_abs_params(input_dev, fsia6b_axes[i], 1000, 2000, 2, 2);
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if (i >= IBUS_SWITCH_OFFSET) {
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input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1 + i);
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input_set_abs_params(input_dev, fsia6b_axes[i],
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1000, 2000, 2, 2);
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}
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// Register switch configuration
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) {
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if (((switch_config[i] == '\0') && (i != IBUS_SERVO_COUNT)) ||
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(switch_config[i] < '0') ||
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(switch_config[i] > '3')) {
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dev_err(&fsia6b->dev->dev,
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"Invalid switch configuration supplied for fsia6b.\n");
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return -EINVAL;
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}
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for (j = '1'; j <= switch_config[i]; ++j) {
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input_dev->keybit[BIT_WORD(BTN_0)] |=
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BIT_MASK(sw_id++);
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}
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}
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err = input_register_device(fsia6b->dev);
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if (err)
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goto fail2;
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err = fsia6b_init_device(fsia6b);
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if (err)
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goto fail3;
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return 0;
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fail3: input_free_device(input_dev);
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fail2: serio_close(serio);
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fail1: serio_set_drvdata(serio, NULL);
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kfree(fsia6b);
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@ -188,8 +223,6 @@ static void fsia6b_serio_disconnect(struct serio *serio)
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{
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struct fsia6b *fsia6b = serio_get_drvdata(serio);
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printk(KERN_INFO "fsia6b: disconnect.\n");
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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input_unregister_device(fsia6b->dev);
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@ -214,7 +247,6 @@ struct serio_driver fsia6b_serio_drv = {
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},
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.description = DRIVER_DESC,
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.id_table = fsia6b_serio_ids,
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.write_wakeup = fsia6b_serio_write_wakeup,
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.interrupt = fsia6b_serio_irq,
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.connect = fsia6b_serio_connect,
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.disconnect = fsia6b_serio_disconnect
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