mirror of https://gitee.com/openkylin/linux.git
145 lines
3.2 KiB
C
145 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* FM801 gameport driver for Linux
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*
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*/
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#include <asm/io.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/gameport.h>
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#define PCI_VENDOR_ID_FORTEMEDIA 0x1319
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#define PCI_DEVICE_ID_FM801_GP 0x0802
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#define HAVE_COOKED
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struct fm801_gp {
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struct gameport *gameport;
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struct resource *res_port;
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};
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#ifdef HAVE_COOKED
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static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
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{
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unsigned short w;
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w = inw(gameport->io + 2);
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*buttons = (~w >> 14) & 0x03;
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axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
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w = inw(gameport->io + 4);
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axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
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w = inw(gameport->io + 6);
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*buttons |= ((~w >> 14) & 0x03) << 2;
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axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
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w = inw(gameport->io + 8);
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axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
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outw(0xff, gameport->io); /* reset */
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return 0;
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}
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#endif
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static int fm801_gp_open(struct gameport *gameport, int mode)
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{
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switch (mode) {
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#ifdef HAVE_COOKED
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case GAMEPORT_MODE_COOKED:
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return 0;
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#endif
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case GAMEPORT_MODE_RAW:
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return 0;
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default:
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return -1;
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}
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return 0;
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}
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static int fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
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{
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struct fm801_gp *gp;
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struct gameport *port;
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int error;
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gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
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port = gameport_allocate_port();
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if (!gp || !port) {
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printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
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error = -ENOMEM;
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goto err_out_free;
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}
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error = pci_enable_device(pci);
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if (error)
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goto err_out_free;
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port->open = fm801_gp_open;
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#ifdef HAVE_COOKED
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port->cooked_read = fm801_gp_cooked_read;
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#endif
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gameport_set_name(port, "FM801");
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gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
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port->dev.parent = &pci->dev;
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port->io = pci_resource_start(pci, 0);
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gp->gameport = port;
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gp->res_port = request_region(port->io, 0x10, "FM801 GP");
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if (!gp->res_port) {
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printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
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port->io, port->io + 0x0f);
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error = -EBUSY;
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goto err_out_disable_dev;
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}
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pci_set_drvdata(pci, gp);
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outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
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gameport_register_port(port);
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return 0;
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err_out_disable_dev:
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pci_disable_device(pci);
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err_out_free:
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gameport_free_port(port);
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kfree(gp);
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return error;
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}
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static void fm801_gp_remove(struct pci_dev *pci)
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{
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struct fm801_gp *gp = pci_get_drvdata(pci);
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gameport_unregister_port(gp->gameport);
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release_resource(gp->res_port);
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kfree(gp);
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pci_disable_device(pci);
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}
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static const struct pci_device_id fm801_gp_id_table[] = {
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{ PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
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static struct pci_driver fm801_gp_driver = {
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.name = "FM801_gameport",
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.id_table = fm801_gp_id_table,
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.probe = fm801_gp_probe,
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.remove = fm801_gp_remove,
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};
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module_pci_driver(fm801_gp_driver);
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MODULE_DESCRIPTION("FM801 gameport driver");
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MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
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MODULE_LICENSE("GPL");
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