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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * FM801 gameport driver for Linux4 *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 0x131919#define PCI_DEVICE_ID_FM801_GP 0x080220 21#define HAVE_COOKED22 23struct fm801_gp {24 struct gameport *gameport;25 struct resource *res_port;26};27 28#ifdef HAVE_COOKED29static 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#endif48 49static int fm801_gp_open(struct gameport *gameport, int mode)50{51 switch (mode) {52#ifdef HAVE_COOKED53 case GAMEPORT_MODE_COOKED:54 return 0;55#endif56 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(*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_COOKED85 port->cooked_read = fm801_gp_cooked_read;86#endif87 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