cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/gameport/fm801-gp.c

/*
 *  FM801 gameport driver for Linux
 *
 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>


#define PCI_VENDOR_ID_FORTEMEDIA	0x1319

#define PCI_DEVICE_ID_FM801_GP	0x0802


#define HAVE_COOKED


struct fm801_gp {
	
struct gameport *gameport;
	
struct resource *res_port;
};

#ifdef HAVE_COOKED

static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons) { unsigned short w; w = inw(gameport->io + 2); *buttons = (~w >> 14) & 0x03; axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); w = inw(gameport->io + 4); axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); w = inw(gameport->io + 6); *buttons |= ((~w >> 14) & 0x03) << 2; axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); w = inw(gameport->io + 8); axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5); outw(0xff, gameport->io); /* reset */ return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik204100.00%1100.00%
Total204100.00%1100.00%

#endif
static int fm801_gp_open(struct gameport *gameport, int mode) { switch (mode) { #ifdef HAVE_COOKED case GAMEPORT_MODE_COOKED: return 0; #endif case GAMEPORT_MODE_RAW: return 0; default: return -1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik45100.00%1100.00%
Total45100.00%1100.00%


static int fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id) { struct fm801_gp *gp; struct gameport *port; int error; gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL); port = gameport_allocate_port(); if (!gp || !port) { printk(KERN_ERR "fm801-gp: Memory allocation failed\n"); error = -ENOMEM; goto err_out_free; } error = pci_enable_device(pci); if (error) goto err_out_free; port->open = fm801_gp_open; #ifdef HAVE_COOKED port->cooked_read = fm801_gp_cooked_read; #endif gameport_set_name(port, "FM801"); gameport_set_phys(port, "pci%s/gameport0", pci_name(pci)); port->dev.parent = &pci->dev; port->io = pci_resource_start(pci, 0); gp->gameport = port; gp->res_port = request_region(port->io, 0x10, "FM801 GP"); if (!gp->res_port) { printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n", port->io, port->io + 0x0f); error = -EBUSY; goto err_out_disable_dev; } pci_set_drvdata(pci, gp); outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */ gameport_register_port(port); return 0; err_out_disable_dev: pci_disable_device(pci); err_out_free: gameport_free_port(port); kfree(gp); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik12450.20%125.00%
Dmitry Torokhov7630.77%125.00%
Jeff Garzik4618.62%125.00%
Pekka J Enberg10.40%125.00%
Total247100.00%4100.00%


static void fm801_gp_remove(struct pci_dev *pci) { struct fm801_gp *gp = pci_get_drvdata(pci); gameport_unregister_port(gp->gameport); release_resource(gp->res_port); kfree(gp); pci_disable_device(pci); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik4088.89%150.00%
Dmitry Torokhov511.11%150.00%
Total45100.00%2100.00%

static const struct pci_device_id fm801_gp_id_table[] = { { PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, { 0 } }; MODULE_DEVICE_TABLE(pci, fm801_gp_id_table); static struct pci_driver fm801_gp_driver = { .name = "FM801_gameport", .id_table = fm801_gp_id_table, .probe = fm801_gp_probe, .remove = fm801_gp_remove, }; module_pci_driver(fm801_gp_driver); MODULE_DESCRIPTION("FM801 gameport driver"); MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik53878.77%220.00%
Dmitry Torokhov8712.74%330.00%
Jeff Garzik466.73%110.00%
Axel Lin91.32%110.00%
Márton Németh10.15%110.00%
Pekka J Enberg10.15%110.00%
Deepak Saxena10.15%110.00%
Greg Kroah-Hartman0.00%00.00%
Total683100.00%10100.00%
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