--- /dev/null
+/*
+ * Copyright (c) 1999-2001 Vojtech Pavlik
+ * Copyright (c) 1999 Brian Gerst
+ */
+
+/*
+ * 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, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <asm/io.h>
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/gameport.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
+MODULE_LICENSE("GPL");
+
+static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
+ 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
+
+struct ns558 {
+ int type;
+ int io;
+ int size;
+ struct pnp_dev *dev;
+ struct gameport *gameport;
+ struct list_head node;
+};
+
+static LIST_HEAD(ns558_list);
+
+/*
+ * 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 int ns558_isa_probe(int io)
+{
+ int i, j, b;
+ unsigned char c, u, v;
+ struct ns558 *ns558;
+ struct gameport *port;
+
+/*
+ * No one should be using this address.
+ */
+
+ if (!request_region(io, 1, "ns558-isa"))
+ return -EBUSY;
+
+/*
+ * 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);
+ release_region(io, 1);
+ return -ENODEV;
+ }
+/*
+ * 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);
+ release_region(io, 1);
+ return -ENODEV;
+ }
+ msleep(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);
+ release_region(io, 1);
+ return -ENODEV;
+ }
+/*
+ * And now find the number of mirrors of the port.
+ */
+
+ for (i = 1; i < 5; i++) {
+
+ release_region(io & (-1 << (i - 1)), (1 << (i - 1)));
+
+ if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
+ break; /* Don't disturb anyone */
+
+ 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++;
+ msleep(3);
+
+ if (b > 300) { /* We allow 30% difference */
+ release_region(io & (-1 << i), (1 << i));
+ break;
+ }
+ }
+
+ i--;
+
+ if (i != 4) {
+ if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
+ return -EBUSY;
+ }
+
+ ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
+ port = gameport_allocate_port();
+ if (!ns558 || !port) {
+ printk(KERN_ERR "ns558: Memory allocation failed.\n");
+ release_region(io & (-1 << i), (1 << i));
+ kfree(ns558);
+ gameport_free_port(port);
+ return -ENOMEM;
+ }
+
+ ns558->io = io;
+ ns558->size = 1 << i;
+ ns558->gameport = port;
+
+ port->io = io;
+ gameport_set_name(port, "NS558 ISA Gameport");
+ gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i));
+
+ gameport_register_port(port);
+
+ list_add(&ns558->node, &ns558_list);
+
+ return 0;
+}
+
+#ifdef CONFIG_PNP
+
+static const struct pnp_device_id pnp_devids[] = {
+ { .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
+ { .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
+ { .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
+ { .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
+ { .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
+ { .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
+ { .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
+ { .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
+ { .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
+ { .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
+ { .id = "CTL7001", .driver_data = 0 }, /* SB16 */
+ { .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
+ { .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
+ { .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
+ { .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
+ { .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
+ { .id = "ESS6880", .driver_data = 0 }, /* ES688 */
+ { .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
+ { .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
+ { .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
+ { .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
+ { .id = "PNPb02f", .driver_data = 0 }, /* Generic */
+ { .id = "", },
+};
+
+MODULE_DEVICE_TABLE(pnp, pnp_devids);
+
+static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
+{
+ int ioport, iolen;
+ struct ns558 *ns558;
+ struct gameport *port;
+
+ if (!pnp_port_valid(dev, 0)) {
+ printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
+ return -ENODEV;
+ }
+
+ ioport = pnp_port_start(dev, 0);
+ iolen = pnp_port_len(dev, 0);
+
+ if (!request_region(ioport, iolen, "ns558-pnp"))
+ return -EBUSY;
+
+ ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
+ port = gameport_allocate_port();
+ if (!ns558 || !port) {
+ printk(KERN_ERR "ns558: Memory allocation failed\n");
+ kfree(ns558);
+ gameport_free_port(port);
+ return -ENOMEM;
+ }
+
+ ns558->io = ioport;
+ ns558->size = iolen;
+ ns558->dev = dev;
+ ns558->gameport = port;
+
+ gameport_set_name(port, "NS558 PnP Gameport");
+ gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev));
+ port->dev.parent = &dev->dev;
+ port->io = ioport;
+
+ gameport_register_port(port);
+
+ list_add_tail(&ns558->node, &ns558_list);
+ return 0;
+}
+
+static struct pnp_driver ns558_pnp_driver = {
+ .name = "ns558",
+ .id_table = pnp_devids,
+ .probe = ns558_pnp_probe,
+};
+
+#else
+
+static struct pnp_driver ns558_pnp_driver;
+
+#endif
+
+static int __init ns558_init(void)
+{
+ int i = 0;
+ int error;
+
+ error = pnp_register_driver(&ns558_pnp_driver);
+ if (error && error != -ENODEV) /* should be ENOSYS really */
+ return error;
+
+/*
+ * Probe ISA ports after PnP, so that PnP ports that are already
+ * enabled get detected as PnP. This may be suboptimal in multi-device
+ * configurations, but saves hassle with simple setups.
+ */
+
+ while (ns558_isa_portlist[i])
+ ns558_isa_probe(ns558_isa_portlist[i++]);
+
+ return list_empty(&ns558_list) && error ? -ENODEV : 0;
+}
+
+static void __exit ns558_exit(void)
+{
+ struct ns558 *ns558, *safe;
+
+ list_for_each_entry_safe(ns558, safe, &ns558_list, node) {
+ gameport_unregister_port(ns558->gameport);
+ release_region(ns558->io & ~(ns558->size - 1), ns558->size);
+ kfree(ns558);
+ }
+
+ pnp_unregister_driver(&ns558_pnp_driver);
+}
+
+module_init(ns558_init);
+module_exit(ns558_exit);
Code Review / kvmfornfv.git / blobdiff