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
23 struct fm801_gp {
24 struct gameport *gameport;
25 struct resource *res_port;
26 };
27
28 #ifdef HAVE_COOKED
fm801_gp_cooked_read(struct gameport * gameport,int * axes,int * buttons)29 static 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
fm801_gp_open(struct gameport * gameport,int mode)49 static 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
fm801_gp_probe(struct pci_dev * pci,const struct pci_device_id * id)65 static 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
fm801_gp_remove(struct pci_dev * pci)116 static 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
127 static 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 };
131 MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
132
133 static 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
140 module_pci_driver(fm801_gp_driver);
141
142 MODULE_DESCRIPTION("FM801 gameport driver");
143 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
144 MODULE_LICENSE("GPL");
145