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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 1999-2001 Vojtech Pavlik
4 *
5 * Based on the work of:
6 * David Thompson
7 */
8
9/*
10 * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
11 */
12
13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/module.h>
16#include <linux/input.h>
17#include <linux/serio.h>
18
19#define DRIVER_DESC "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
20
21MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
22MODULE_DESCRIPTION(DRIVER_DESC);
23MODULE_LICENSE("GPL");
24
25/*
26 * Constants.
27 */
28
29#define SPACEORB_MAX_LENGTH 64
30
31static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
32static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
33
34/*
35 * Per-Orb data.
36 */
37
38struct spaceorb {
39 struct input_dev *dev;
40 int idx;
41 unsigned char data[SPACEORB_MAX_LENGTH];
42 char phys[32];
43};
44
45static unsigned char spaceorb_xor[] = "SpaceWare";
46
47static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
48 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
49
50/*
51 * spaceorb_process_packet() decodes packets the driver receives from the
52 * SpaceOrb.
53 */
54
55static void spaceorb_process_packet(struct spaceorb *spaceorb)
56{
57 struct input_dev *dev = spaceorb->dev;
58 unsigned char *data = spaceorb->data;
59 unsigned char c = 0;
60 int axes[6];
61 int i;
62
63 if (spaceorb->idx < 2) return;
64 for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
65 if (c) return;
66
67 switch (data[0]) {
68
69 case 'R': /* Reset packet */
70 spaceorb->data[spaceorb->idx - 1] = 0;
71 for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
72 printk(KERN_INFO "input: %s [%s] is %s\n",
73 dev->name, spaceorb->data + i, spaceorb->phys);
74 break;
75
76 case 'D': /* Ball + button data */
77 if (spaceorb->idx != 12) return;
78 for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
79 axes[0] = ( data[2] << 3) | (data[ 3] >> 4);
80 axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
81 axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
82 axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
83 axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
84 axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
85 for (i = 0; i < 6; i++)
86 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
87 for (i = 0; i < 6; i++)
88 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
89 break;
90
91 case 'K': /* Button data */
92 if (spaceorb->idx != 5) return;
93 for (i = 0; i < 6; i++)
94 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
95
96 break;
97
98 case 'E': /* Error packet */
99 if (spaceorb->idx != 4) return;
100 printk(KERN_ERR "spaceorb: Device error. [ ");
101 for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
102 printk("]\n");
103 break;
104 }
105
106 input_sync(dev);
107}
108
109static irqreturn_t spaceorb_interrupt(struct serio *serio,
110 unsigned char data, unsigned int flags)
111{
112 struct spaceorb* spaceorb = serio_get_drvdata(serio);
113
114 if (~data & 0x80) {
115 if (spaceorb->idx) spaceorb_process_packet(spaceorb);
116 spaceorb->idx = 0;
117 }
118 if (spaceorb->idx < SPACEORB_MAX_LENGTH)
119 spaceorb->data[spaceorb->idx++] = data & 0x7f;
120 return IRQ_HANDLED;
121}
122
123/*
124 * spaceorb_disconnect() is the opposite of spaceorb_connect()
125 */
126
127static void spaceorb_disconnect(struct serio *serio)
128{
129 struct spaceorb* spaceorb = serio_get_drvdata(serio);
130
131 serio_close(serio);
132 serio_set_drvdata(serio, NULL);
133 input_unregister_device(spaceorb->dev);
134 kfree(spaceorb);
135}
136
137/*
138 * spaceorb_connect() is the routine that is called when someone adds a
139 * new serio device that supports SpaceOrb/Avenger protocol and registers
140 * it as an input device.
141 */
142
143static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
144{
145 struct spaceorb *spaceorb;
146 struct input_dev *input_dev;
147 int err = -ENOMEM;
148 int i;
149
150 spaceorb = kzalloc_obj(*spaceorb);
151 input_dev = input_allocate_device();
152 if (!spaceorb || !input_dev)
153 goto fail1;
154
155 spaceorb->dev = input_dev;
156 snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
157
158 input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
159 input_dev->phys = spaceorb->phys;
160 input_dev->id.bustype = BUS_RS232;
161 input_dev->id.vendor = SERIO_SPACEORB;
162 input_dev->id.product = 0x0001;
163 input_dev->id.version = 0x0100;
164 input_dev->dev.parent = &serio->dev;
165
166 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
167
168 for (i = 0; i < 6; i++)
169 set_bit(spaceorb_buttons[i], input_dev->keybit);
170
171 for (i = 0; i < 6; i++)
172 input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
173
174 serio_set_drvdata(serio, spaceorb);
175
176 err = serio_open(serio, drv);
177 if (err)
178 goto fail2;
179
180 err = input_register_device(spaceorb->dev);
181 if (err)
182 goto fail3;
183
184 return 0;
185
186 fail3: serio_close(serio);
187 fail2: serio_set_drvdata(serio, NULL);
188 fail1: input_free_device(input_dev);
189 kfree(spaceorb);
190 return err;
191}
192
193/*
194 * The serio driver structure.
195 */
196
197static const struct serio_device_id spaceorb_serio_ids[] = {
198 {
199 .type = SERIO_RS232,
200 .proto = SERIO_SPACEORB,
201 .id = SERIO_ANY,
202 .extra = SERIO_ANY,
203 },
204 { 0 }
205};
206
207MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
208
209static struct serio_driver spaceorb_drv = {
210 .driver = {
211 .name = "spaceorb",
212 },
213 .description = DRIVER_DESC,
214 .id_table = spaceorb_serio_ids,
215 .interrupt = spaceorb_interrupt,
216 .connect = spaceorb_connect,
217 .disconnect = spaceorb_disconnect,
218};
219
220module_serio_driver(spaceorb_drv);