1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  FM801 gameport driver for Linux
4 *
5 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
6 */
7
8#include <asm/io.h>
9#include <linux/delay.h>
10#include <linux/errno.h>
11#include <linux/ioport.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/pci.h>
15#include <linux/slab.h>
16#include <linux/gameport.h>
17
18#define PCI_VENDOR_ID_FORTEMEDIA	0x1319
19#define PCI_DEVICE_ID_FM801_GP	0x0802
20
21#define HAVE_COOKED
22
23struct fm801_gp {
24	struct gameport *gameport;
25	struct resource *res_port;
26};
27
28#ifdef HAVE_COOKED
29static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
30{
31	unsigned short w;
32
33	w = inw(gameport->io + 2);
34	*buttons = (~w >> 14) & 0x03;
35	axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
36	w = inw(gameport->io + 4);
37	axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
38	w = inw(gameport->io + 6);
39	*buttons |= ((~w >> 14) & 0x03) << 2;
40	axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
41	w = inw(gameport->io + 8);
42	axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
43	outw(0xff, gameport->io); /* reset */
44
45        return 0;
46}
47#endif
48
49static int fm801_gp_open(struct gameport *gameport, int mode)
50{
51	switch (mode) {
52#ifdef HAVE_COOKED
53	case GAMEPORT_MODE_COOKED:
54		return 0;
55#endif
56	case GAMEPORT_MODE_RAW:
57		return 0;
58	default:
59		return -1;
60	}
61
62	return 0;
63}
64
65static int fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
66{
67	struct fm801_gp *gp;
68	struct gameport *port;
69	int error;
70
71	gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
72	port = gameport_allocate_port();
73	if (!gp || !port) {
74		printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
75		error = -ENOMEM;
76		goto err_out_free;
77	}
78
79	error = pci_enable_device(pci);
80	if (error)
81		goto err_out_free;
82
83	port->open = fm801_gp_open;
84#ifdef HAVE_COOKED
85	port->cooked_read = fm801_gp_cooked_read;
86#endif
87	gameport_set_name(port, "FM801");
88	gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
89	port->dev.parent = &pci->dev;
90	port->io = pci_resource_start(pci, 0);
91
92	gp->gameport = port;
93	gp->res_port = request_region(port->io, 0x10, "FM801 GP");
94	if (!gp->res_port) {
95		printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
96			port->io, port->io + 0x0f);
97		error = -EBUSY;
98		goto err_out_disable_dev;
99	}
100
101	pci_set_drvdata(pci, gp);
102
103	outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
104	gameport_register_port(port);
105
106	return 0;
107
108 err_out_disable_dev:
109	pci_disable_device(pci);
110 err_out_free:
111	gameport_free_port(port);
112	kfree(gp);
113	return error;
114}
115
116static void fm801_gp_remove(struct pci_dev *pci)
117{
118	struct fm801_gp *gp = pci_get_drvdata(pci);
119
120	gameport_unregister_port(gp->gameport);
121	release_resource(gp->res_port);
122	kfree(gp);
123
124	pci_disable_device(pci);
125}
126
127static const struct pci_device_id fm801_gp_id_table[] = {
128	{ PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
129	{ 0 }
130};
131MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
132
133static struct pci_driver fm801_gp_driver = {
134	.name =		"FM801_gameport",
135	.id_table =	fm801_gp_id_table,
136	.probe =	fm801_gp_probe,
137	.remove =	fm801_gp_remove,
138};
139
140module_pci_driver(fm801_gp_driver);
141
142MODULE_DESCRIPTION("FM801 gameport driver");
143MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
144MODULE_LICENSE("GPL");
145