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 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 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 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 } 115 116 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