1 /* 2 * FM801 gameport driver for Linux 3 * 4 * Copyright (c) by Takashi Iwai <tiwai@suse.de> 5 * 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * 21 */ 22 23 #include <asm/io.h> 24 #include <linux/delay.h> 25 #include <linux/errno.h> 26 #include <linux/ioport.h> 27 #include <linux/kernel.h> 28 #include <linux/module.h> 29 #include <linux/pci.h> 30 #include <linux/init.h> 31 #include <linux/slab.h> 32 #include <linux/gameport.h> 33 34 #define PCI_VENDOR_ID_FORTEMEDIA 0x1319 35 #define PCI_DEVICE_ID_FM801_GP 0x0802 36 37 #define HAVE_COOKED 38 39 struct fm801_gp { 40 struct gameport *gameport; 41 struct resource *res_port; 42 }; 43 44 #ifdef HAVE_COOKED 45 static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons) 46 { 47 unsigned short w; 48 49 w = inw(gameport->io + 2); 50 *buttons = (~w >> 14) & 0x03; 51 axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); 52 w = inw(gameport->io + 4); 53 axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); 54 w = inw(gameport->io + 6); 55 *buttons |= ((~w >> 14) & 0x03) << 2; 56 axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); 57 w = inw(gameport->io + 8); 58 axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); 59 outw(0xff, gameport->io); /* reset */ 60 61 return 0; 62 } 63 #endif 64 65 static int fm801_gp_open(struct gameport *gameport, int mode) 66 { 67 switch (mode) { 68 #ifdef HAVE_COOKED 69 case GAMEPORT_MODE_COOKED: 70 return 0; 71 #endif 72 case GAMEPORT_MODE_RAW: 73 return 0; 74 default: 75 return -1; 76 } 77 78 return 0; 79 } 80 81 static int __devinit fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id) 82 { 83 struct fm801_gp *gp; 84 struct gameport *port; 85 86 gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL); 87 port = gameport_allocate_port(); 88 if (!gp || !port) { 89 printk(KERN_ERR "fm801-gp: Memory allocation failed\n"); 90 kfree(gp); 91 gameport_free_port(port); 92 return -ENOMEM; 93 } 94 95 pci_enable_device(pci); 96 97 port->open = fm801_gp_open; 98 #ifdef HAVE_COOKED 99 port->cooked_read = fm801_gp_cooked_read; 100 #endif 101 gameport_set_name(port, "FM801"); 102 gameport_set_phys(port, "pci%s/gameport0", pci_name(pci)); 103 port->dev.parent = &pci->dev; 104 port->io = pci_resource_start(pci, 0); 105 106 gp->gameport = port; 107 gp->res_port = request_region(port->io, 0x10, "FM801 GP"); 108 if (!gp->res_port) { 109 kfree(gp); 110 gameport_free_port(port); 111 printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n", 112 port->io, port->io + 0x0f); 113 return -EBUSY; 114 } 115 116 pci_set_drvdata(pci, gp); 117 118 outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */ 119 gameport_register_port(port); 120 121 return 0; 122 } 123 124 static void __devexit fm801_gp_remove(struct pci_dev *pci) 125 { 126 struct fm801_gp *gp = pci_get_drvdata(pci); 127 128 if (gp) { 129 gameport_unregister_port(gp->gameport); 130 release_resource(gp->res_port); 131 kfree(gp); 132 } 133 } 134 135 static struct pci_device_id fm801_gp_id_table[] = { 136 { PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 137 { 0 } 138 }; 139 140 static struct pci_driver fm801_gp_driver = { 141 .name = "FM801_gameport", 142 .id_table = fm801_gp_id_table, 143 .probe = fm801_gp_probe, 144 .remove = __devexit_p(fm801_gp_remove), 145 }; 146 147 static int __init fm801_gp_init(void) 148 { 149 return pci_register_driver(&fm801_gp_driver); 150 } 151 152 static void __exit fm801_gp_exit(void) 153 { 154 pci_unregister_driver(&fm801_gp_driver); 155 } 156 157 module_init(fm801_gp_init); 158 module_exit(fm801_gp_exit); 159 160 MODULE_DEVICE_TABLE(pci, fm801_gp_id_table); 161 162 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); 163 MODULE_LICENSE("GPL"); 164