1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *	SEGA Dreamcast controller driver
4 *	Based on drivers/usb/iforce.c
5 *
6 *	Copyright Yaegashi Takeshi, 2001
7 *	Adrian McMenamin, 2008 - 2009
8 */
9
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/input.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/timer.h>
16#include <linux/maple.h>
17
18MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
19MODULE_DESCRIPTION("SEGA Dreamcast controller driver");
20MODULE_LICENSE("GPL");
21
22struct dc_pad {
23	struct input_dev *dev;
24	struct maple_device *mdev;
25};
26
27static void dc_pad_callback(struct mapleq *mq)
28{
29	unsigned short buttons;
30	struct maple_device *mapledev = mq->dev;
31	struct dc_pad *pad = maple_get_drvdata(mapledev);
32	struct input_dev *dev = pad->dev;
33	unsigned char *res = mq->recvbuf->buf;
34
35	buttons = ~le16_to_cpup((__le16 *)(res + 8));
36
37	input_report_abs(dev, ABS_HAT0Y,
38		(buttons & 0x0010 ? -1 : 0) + (buttons & 0x0020 ? 1 : 0));
39	input_report_abs(dev, ABS_HAT0X,
40		(buttons & 0x0040 ? -1 : 0) + (buttons & 0x0080 ? 1 : 0));
41	input_report_abs(dev, ABS_HAT1Y,
42		(buttons & 0x1000 ? -1 : 0) + (buttons & 0x2000 ? 1 : 0));
43	input_report_abs(dev, ABS_HAT1X,
44		(buttons & 0x4000 ? -1 : 0) + (buttons & 0x8000 ? 1 : 0));
45
46	input_report_key(dev, BTN_C,      buttons & 0x0001);
47	input_report_key(dev, BTN_B,      buttons & 0x0002);
48	input_report_key(dev, BTN_A,      buttons & 0x0004);
49	input_report_key(dev, BTN_START,  buttons & 0x0008);
50	input_report_key(dev, BTN_Z,      buttons & 0x0100);
51	input_report_key(dev, BTN_Y,      buttons & 0x0200);
52	input_report_key(dev, BTN_X,      buttons & 0x0400);
53	input_report_key(dev, BTN_SELECT, buttons & 0x0800);
54
55	input_report_abs(dev, ABS_GAS,    res[10]);
56	input_report_abs(dev, ABS_BRAKE,  res[11]);
57	input_report_abs(dev, ABS_X,      res[12]);
58	input_report_abs(dev, ABS_Y,      res[13]);
59	input_report_abs(dev, ABS_RX,     res[14]);
60	input_report_abs(dev, ABS_RY,     res[15]);
61}
62
63static int dc_pad_open(struct input_dev *dev)
64{
65	struct dc_pad *pad = dev_get_platdata(&dev->dev);
66
67	maple_getcond_callback(pad->mdev, dc_pad_callback, HZ/20,
68		MAPLE_FUNC_CONTROLLER);
69
70	return 0;
71}
72
73static void dc_pad_close(struct input_dev *dev)
74{
75	struct dc_pad *pad = dev_get_platdata(&dev->dev);
76
77	maple_getcond_callback(pad->mdev, dc_pad_callback, 0,
78		MAPLE_FUNC_CONTROLLER);
79}
80
81/* allow the controller to be used */
82static int probe_maple_controller(struct device *dev)
83{
84	static const short btn_bit[32] = {
85		BTN_C, BTN_B, BTN_A, BTN_START, -1, -1, -1, -1,
86		BTN_Z, BTN_Y, BTN_X, BTN_SELECT, -1, -1, -1, -1,
87		-1, -1, -1, -1, -1, -1, -1, -1,
88		-1, -1, -1, -1, -1, -1, -1, -1,
89	};
90
91	static const short abs_bit[32] = {
92		-1, -1, -1, -1, ABS_HAT0Y, ABS_HAT0Y, ABS_HAT0X, ABS_HAT0X,
93		-1, -1, -1, -1, ABS_HAT1Y, ABS_HAT1Y, ABS_HAT1X, ABS_HAT1X,
94		ABS_GAS, ABS_BRAKE, ABS_X, ABS_Y, ABS_RX, ABS_RY, -1, -1,
95		-1, -1, -1, -1, -1, -1, -1, -1,
96	};
97
98	struct maple_device *mdev = to_maple_dev(dev);
99	struct maple_driver *mdrv = to_maple_driver(dev->driver);
100	int i, error;
101	struct dc_pad *pad;
102	struct input_dev *idev;
103	unsigned long data = be32_to_cpu(mdev->devinfo.function_data[0]);
104
105	pad = kzalloc(sizeof(struct dc_pad), GFP_KERNEL);
106	idev = input_allocate_device();
107	if (!pad || !idev) {
108		error = -ENOMEM;
109		goto fail;
110	}
111
112	pad->dev = idev;
113	pad->mdev = mdev;
114
115	idev->open = dc_pad_open;
116	idev->close = dc_pad_close;
117
118	for (i = 0; i < 32; i++) {
119		if (data & (1 << i)) {
120			if (btn_bit[i] >= 0)
121				__set_bit(btn_bit[i], idev->keybit);
122			else if (abs_bit[i] >= 0)
123				__set_bit(abs_bit[i], idev->absbit);
124		}
125	}
126
127	if (idev->keybit[BIT_WORD(BTN_JOYSTICK)])
128		idev->evbit[0] |= BIT_MASK(EV_KEY);
129
130	if (idev->absbit[0])
131		idev->evbit[0] |= BIT_MASK(EV_ABS);
132
133	for (i = ABS_X; i <= ABS_BRAKE; i++)
134		input_set_abs_params(idev, i, 0, 255, 0, 0);
135
136	for (i = ABS_HAT0X; i <= ABS_HAT3Y; i++)
137		input_set_abs_params(idev, i, 1, -1, 0, 0);
138
139	idev->dev.platform_data = pad;
140	idev->dev.parent = &mdev->dev;
141	idev->name = mdev->product_name;
142	idev->id.bustype = BUS_HOST;
143
144	error = input_register_device(idev);
145	if (error)
146		goto fail;
147
148	mdev->driver = mdrv;
149	maple_set_drvdata(mdev, pad);
150
151	return 0;
152
153fail:
154	input_free_device(idev);
155	kfree(pad);
156	maple_set_drvdata(mdev, NULL);
157	return error;
158}
159
160static int remove_maple_controller(struct device *dev)
161{
162	struct maple_device *mdev = to_maple_dev(dev);
163	struct dc_pad *pad = maple_get_drvdata(mdev);
164
165	mdev->callback = NULL;
166	input_unregister_device(pad->dev);
167	maple_set_drvdata(mdev, NULL);
168	kfree(pad);
169
170	return 0;
171}
172
173static struct maple_driver dc_pad_driver = {
174	.function =	MAPLE_FUNC_CONTROLLER,
175	.drv = {
176		.name	= "Dreamcast_controller",
177		.probe	= probe_maple_controller,
178		.remove	= remove_maple_controller,
179	},
180};
181
182static int __init dc_pad_init(void)
183{
184	return maple_driver_register(&dc_pad_driver);
185}
186
187static void __exit dc_pad_exit(void)
188{
189	maple_driver_unregister(&dc_pad_driver);
190}
191
192module_init(dc_pad_init);
193module_exit(dc_pad_exit);
194