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It is preferred to use sizeof(*pointer) instead of sizeof(type) due to the type of the variable can change and one needs not change the former (unlike the latter). This patch has no effect on runtime behavior. Signed-off-by: Erick Archer <erick.archer@outlook.com> Link: https://lore.kernel.org/r/PAXPR02MB72483F512F863C74A4AECA2B8BFB2@PAXPR02MB7248.eurprd02.prod.outlook.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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(*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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