/* * $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 , or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */ #include #include #include #include #include #include #include #include MODULE_AUTHOR("Vojtech Pavlik "); 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 kHz\n", 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? Weird\n"); return next; } if (dev->activate && dev->activate(dev) < 0) { printk(KERN_ERR "ns558: PnP resource allocation failed\n"); 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 kHz\n", 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);