1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 1999-2001 Vojtech Pavlik |
4 | */ |
5 | |
6 | /* |
7 | * Logitech WingMan Warrior joystick driver for Linux |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/module.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/input.h> |
14 | #include <linux/serio.h> |
15 | |
16 | #define DRIVER_DESC "Logitech WingMan Warrior joystick driver" |
17 | |
18 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
19 | MODULE_DESCRIPTION(DRIVER_DESC); |
20 | MODULE_LICENSE("GPL" ); |
21 | |
22 | /* |
23 | * Constants. |
24 | */ |
25 | |
26 | #define WARRIOR_MAX_LENGTH 16 |
27 | static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 }; |
28 | |
29 | /* |
30 | * Per-Warrior data. |
31 | */ |
32 | |
33 | struct warrior { |
34 | struct input_dev *dev; |
35 | int idx, len; |
36 | unsigned char data[WARRIOR_MAX_LENGTH]; |
37 | char phys[32]; |
38 | }; |
39 | |
40 | /* |
41 | * warrior_process_packet() decodes packets the driver receives from the |
42 | * Warrior. It updates the data accordingly. |
43 | */ |
44 | |
45 | static void warrior_process_packet(struct warrior *warrior) |
46 | { |
47 | struct input_dev *dev = warrior->dev; |
48 | unsigned char *data = warrior->data; |
49 | |
50 | if (!warrior->idx) return; |
51 | |
52 | switch ((data[0] >> 4) & 7) { |
53 | case 1: /* Button data */ |
54 | input_report_key(dev, BTN_TRIGGER, value: data[3] & 1); |
55 | input_report_key(dev, BTN_THUMB, value: (data[3] >> 1) & 1); |
56 | input_report_key(dev, BTN_TOP, value: (data[3] >> 2) & 1); |
57 | input_report_key(dev, BTN_TOP2, value: (data[3] >> 3) & 1); |
58 | break; |
59 | case 3: /* XY-axis info->data */ |
60 | input_report_abs(dev, ABS_X, value: ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5))); |
61 | input_report_abs(dev, ABS_Y, value: (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); |
62 | break; |
63 | case 5: /* Throttle, spinner, hat info->data */ |
64 | input_report_abs(dev, ABS_THROTTLE, value: (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); |
65 | input_report_abs(dev, ABS_HAT0X, value: (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0)); |
66 | input_report_abs(dev, ABS_HAT0Y, value: (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0)); |
67 | input_report_rel(dev, REL_DIAL, value: (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5)); |
68 | break; |
69 | } |
70 | input_sync(dev); |
71 | } |
72 | |
73 | /* |
74 | * warrior_interrupt() is called by the low level driver when characters |
75 | * are ready for us. We then buffer them for further processing, or call the |
76 | * packet processing routine. |
77 | */ |
78 | |
79 | static irqreturn_t warrior_interrupt(struct serio *serio, |
80 | unsigned char data, unsigned int flags) |
81 | { |
82 | struct warrior *warrior = serio_get_drvdata(serio); |
83 | |
84 | if (data & 0x80) { |
85 | if (warrior->idx) warrior_process_packet(warrior); |
86 | warrior->idx = 0; |
87 | warrior->len = warrior_lengths[(data >> 4) & 7]; |
88 | } |
89 | |
90 | if (warrior->idx < warrior->len) |
91 | warrior->data[warrior->idx++] = data; |
92 | |
93 | if (warrior->idx == warrior->len) { |
94 | if (warrior->idx) warrior_process_packet(warrior); |
95 | warrior->idx = 0; |
96 | warrior->len = 0; |
97 | } |
98 | return IRQ_HANDLED; |
99 | } |
100 | |
101 | /* |
102 | * warrior_disconnect() is the opposite of warrior_connect() |
103 | */ |
104 | |
105 | static void warrior_disconnect(struct serio *serio) |
106 | { |
107 | struct warrior *warrior = serio_get_drvdata(serio); |
108 | |
109 | serio_close(serio); |
110 | serio_set_drvdata(serio, NULL); |
111 | input_unregister_device(warrior->dev); |
112 | kfree(objp: warrior); |
113 | } |
114 | |
115 | /* |
116 | * warrior_connect() is the routine that is called when someone adds a |
117 | * new serio device. It looks for the Warrior, and if found, registers |
118 | * it as an input device. |
119 | */ |
120 | |
121 | static int warrior_connect(struct serio *serio, struct serio_driver *drv) |
122 | { |
123 | struct warrior *warrior; |
124 | struct input_dev *input_dev; |
125 | int err = -ENOMEM; |
126 | |
127 | warrior = kzalloc(size: sizeof(struct warrior), GFP_KERNEL); |
128 | input_dev = input_allocate_device(); |
129 | if (!warrior || !input_dev) |
130 | goto fail1; |
131 | |
132 | warrior->dev = input_dev; |
133 | snprintf(buf: warrior->phys, size: sizeof(warrior->phys), fmt: "%s/input0" , serio->phys); |
134 | |
135 | input_dev->name = "Logitech WingMan Warrior" ; |
136 | input_dev->phys = warrior->phys; |
137 | input_dev->id.bustype = BUS_RS232; |
138 | input_dev->id.vendor = SERIO_WARRIOR; |
139 | input_dev->id.product = 0x0001; |
140 | input_dev->id.version = 0x0100; |
141 | input_dev->dev.parent = &serio->dev; |
142 | |
143 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) | |
144 | BIT_MASK(EV_ABS); |
145 | input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) | |
146 | BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2); |
147 | input_dev->relbit[0] = BIT_MASK(REL_DIAL); |
148 | input_set_abs_params(dev: input_dev, ABS_X, min: -64, max: 64, fuzz: 0, flat: 8); |
149 | input_set_abs_params(dev: input_dev, ABS_Y, min: -64, max: 64, fuzz: 0, flat: 8); |
150 | input_set_abs_params(dev: input_dev, ABS_THROTTLE, min: -112, max: 112, fuzz: 0, flat: 0); |
151 | input_set_abs_params(dev: input_dev, ABS_HAT0X, min: -1, max: 1, fuzz: 0, flat: 0); |
152 | input_set_abs_params(dev: input_dev, ABS_HAT0Y, min: -1, max: 1, fuzz: 0, flat: 0); |
153 | |
154 | serio_set_drvdata(serio, data: warrior); |
155 | |
156 | err = serio_open(serio, drv); |
157 | if (err) |
158 | goto fail2; |
159 | |
160 | err = input_register_device(warrior->dev); |
161 | if (err) |
162 | goto fail3; |
163 | |
164 | return 0; |
165 | |
166 | fail3: serio_close(serio); |
167 | fail2: serio_set_drvdata(serio, NULL); |
168 | fail1: input_free_device(dev: input_dev); |
169 | kfree(objp: warrior); |
170 | return err; |
171 | } |
172 | |
173 | /* |
174 | * The serio driver structure. |
175 | */ |
176 | |
177 | static const struct serio_device_id warrior_serio_ids[] = { |
178 | { |
179 | .type = SERIO_RS232, |
180 | .proto = SERIO_WARRIOR, |
181 | .id = SERIO_ANY, |
182 | .extra = SERIO_ANY, |
183 | }, |
184 | { 0 } |
185 | }; |
186 | |
187 | MODULE_DEVICE_TABLE(serio, warrior_serio_ids); |
188 | |
189 | static struct serio_driver warrior_drv = { |
190 | .driver = { |
191 | .name = "warrior" , |
192 | }, |
193 | .description = DRIVER_DESC, |
194 | .id_table = warrior_serio_ids, |
195 | .interrupt = warrior_interrupt, |
196 | .connect = warrior_connect, |
197 | .disconnect = warrior_disconnect, |
198 | }; |
199 | |
200 | module_serio_driver(warrior_drv); |
201 | |