ns558.c
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上传日期:2013-04-10
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- /*
- * $Id: ns558.c,v 1.29 2001/04/24 07:48:56 vojtech Exp $
- *
- * Copyright (c) 1999-2001 Vojtech Pavlik
- * Copyright (c) 1999 Brian Gerst
- *
- * Sponsored by SuSE
- */
- /*
- * NS558 based standard IBM game port driver for Linux
- */
- /*
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Should you need to contact me, the author, you can do so either by
- * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
- * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
- */
- #include <asm/io.h>
- #include <linux/module.h>
- #include <linux/ioport.h>
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/gameport.h>
- #include <linux/slab.h>
- #include <linux/isapnp.h>
- MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
- MODULE_LICENSE("GPL");
- #define NS558_ISA 1
- #define NS558_PNP 2
- static int ns558_isa_portlist[] = { 0x200, 0x201, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
- 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
- struct ns558 {
- int type;
- int size;
- struct pci_dev *dev;
- struct ns558 *next;
- struct gameport gameport;
- };
-
- static struct ns558 *ns558;
- /*
- * ns558_isa_probe() tries to find an isa gameport at the
- * specified address, and also checks for mirrors.
- * A joystick must be attached for this to work.
- */
- static struct ns558* ns558_isa_probe(int io, struct ns558 *next)
- {
- int i, j, b;
- unsigned char c, u, v;
- struct ns558 *port;
- /*
- * No one should be using this address.
- */
- if (check_region(io, 1))
- return next;
- /*
- * We must not be able to write arbitrary values to the port.
- * The lower two axis bits must be 1 after a write.
- */
- c = inb(io);
- outb(~c & ~3, io);
- if (~(u = v = inb(io)) & 3) {
- outb(c, io);
- return next;
- }
- /*
- * After a trigger, there must be at least some bits changing.
- */
- for (i = 0; i < 1000; i++) v &= inb(io);
- if (u == v) {
- outb(c, io);
- return next;
- }
- wait_ms(3);
- /*
- * After some time (4ms) the axes shouldn't change anymore.
- */
- u = inb(io);
- for (i = 0; i < 1000; i++)
- if ((u ^ inb(io)) & 0xf) {
- outb(c, io);
- return next;
- }
- /*
- * And now find the number of mirrors of the port.
- */
- for (i = 1; i < 5; i++) {
- if (check_region(io & (-1 << i), (1 << i))) /* Don't disturb anyone */
- break;
- outb(0xff, io & (-1 << i));
- for (j = b = 0; j < 1000; j++)
- if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
- wait_ms(3);
- if (b > 300) /* We allow 30% difference */
- break;
- }
- i--;
- if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
- printk(KERN_ERR "ns558: Memory allocation failed.n");
- return next;
- }
- memset(port, 0, sizeof(struct ns558));
-
- port->next = next;
- port->type = NS558_ISA;
- port->size = (1 << i);
- port->gameport.io = io & (-1 << i);
- request_region(port->gameport.io, (1 << i), "ns558-isa");
- gameport_register_port(&port->gameport);
- printk(KERN_INFO "gameport%d: NS558 ISA at %#x", port->gameport.number, port->gameport.io);
- if (port->size > 1) printk(" size %d", port->size);
- printk(" speed %d kHzn", port->gameport.speed);
- return port;
- }
- #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
- #define NSS558_ISAPNP
- #endif
- #ifdef NSS558_ISAPNP
- static struct isapnp_device_id pnp_devids[] = {
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x0001), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x2001), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7001), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7002), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0b35), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P','N','P'), ISAPNP_DEVICE(0xb02f), 0 },
- { 0, },
- };
- MODULE_DEVICE_TABLE(isapnp, pnp_devids);
- static struct ns558* ns558_pnp_probe(struct pci_dev *dev, struct ns558 *next)
- {
- int ioport, iolen;
- struct ns558 *port;
- if (dev->prepare && dev->prepare(dev) < 0)
- return next;
- if (!(dev->resource[0].flags & IORESOURCE_IO)) {
- printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weirdn");
- return next;
- }
- if (dev->activate && dev->activate(dev) < 0) {
- printk(KERN_ERR "ns558: PnP resource allocation failedn");
- return next;
- }
-
- ioport = pci_resource_start(dev, 0);
- iolen = pci_resource_len(dev, 0);
- if (!request_region(ioport, iolen, "ns558-pnp"))
- goto deactivate;
- if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
- printk(KERN_ERR "ns558: Memory allocation failed.n");
- goto deactivate;
- }
- memset(port, 0, sizeof(struct ns558));
- port->next = next;
- port->type = NS558_PNP;
- port->gameport.io = ioport;
- port->size = iolen;
- port->dev = dev;
- gameport_register_port(&port->gameport);
- printk(KERN_INFO "gameport%d: NS558 PnP at %#x", port->gameport.number, port->gameport.io);
- if (iolen > 1) printk(" size %d", iolen);
- printk(" speed %d kHzn", port->gameport.speed);
- return port;
- deactivate:
- if (dev->deactivate)
- dev->deactivate(dev);
- return next;
- }
- #endif
- int __init ns558_init(void)
- {
- int i = 0;
- #ifdef NSS558_ISAPNP
- struct isapnp_device_id *devid;
- struct pci_dev *dev = NULL;
- #endif
- /*
- * Probe for ISA ports.
- */
- while (ns558_isa_portlist[i])
- ns558 = ns558_isa_probe(ns558_isa_portlist[i++], ns558);
- /*
- * Probe for PnP ports.
- */
- #ifdef NSS558_ISAPNP
- for (devid = pnp_devids; devid->vendor; devid++) {
- while ((dev = isapnp_find_dev(NULL, devid->vendor, devid->function, dev))) {
- ns558 = ns558_pnp_probe(dev, ns558);
- }
- }
- #endif
- return ns558 ? 0 : -ENODEV;
- }
- void __exit ns558_exit(void)
- {
- struct ns558 *next, *port = ns558;
- while (port) {
- gameport_unregister_port(&port->gameport);
- switch (port->type) {
- #ifdef NSS558_ISAPNP
- case NS558_PNP:
- if (port->dev->deactivate)
- port->dev->deactivate(port->dev);
- /* fall through */
- #endif
- case NS558_ISA:
- release_region(port->gameport.io, port->size);
- break;
-
- default:
- break;
- }
-
- next = port->next;
- kfree(port);
- port = next;
- }
- }
- module_init(ns558_init);
- module_exit(ns558_exit);