mirror of https://gitee.com/openkylin/linux.git
271 lines
6.3 KiB
C
271 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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* Copyright (c) 1999 Brian Gerst
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*/
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/*
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* NS558 based standard IBM game port driver for Linux
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*/
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/*
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*/
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#include <asm/io.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/gameport.h>
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#include <linux/slab.h>
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#include <linux/pnp.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
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MODULE_LICENSE("GPL");
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static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
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0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
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struct ns558 {
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int type;
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int io;
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int size;
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struct pnp_dev *dev;
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struct gameport *gameport;
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struct list_head node;
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};
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static LIST_HEAD(ns558_list);
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/*
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* ns558_isa_probe() tries to find an isa gameport at the
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* specified address, and also checks for mirrors.
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* A joystick must be attached for this to work.
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*/
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static int ns558_isa_probe(int io)
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{
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int i, j, b;
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unsigned char c, u, v;
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struct ns558 *ns558;
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struct gameport *port;
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/*
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* No one should be using this address.
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*/
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if (!request_region(io, 1, "ns558-isa"))
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return -EBUSY;
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/*
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* We must not be able to write arbitrary values to the port.
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* The lower two axis bits must be 1 after a write.
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*/
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c = inb(io);
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outb(~c & ~3, io);
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if (~(u = v = inb(io)) & 3) {
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outb(c, io);
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release_region(io, 1);
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return -ENODEV;
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}
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/*
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* After a trigger, there must be at least some bits changing.
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*/
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for (i = 0; i < 1000; i++) v &= inb(io);
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if (u == v) {
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outb(c, io);
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release_region(io, 1);
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return -ENODEV;
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}
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msleep(3);
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/*
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* After some time (4ms) the axes shouldn't change anymore.
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*/
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u = inb(io);
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for (i = 0; i < 1000; i++)
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if ((u ^ inb(io)) & 0xf) {
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outb(c, io);
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release_region(io, 1);
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return -ENODEV;
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}
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/*
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* And now find the number of mirrors of the port.
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*/
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for (i = 1; i < 5; i++) {
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release_region(io & (-1 << (i - 1)), (1 << (i - 1)));
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if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
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break; /* Don't disturb anyone */
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outb(0xff, io & (-1 << i));
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for (j = b = 0; j < 1000; j++)
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if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
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msleep(3);
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if (b > 300) { /* We allow 30% difference */
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release_region(io & (-1 << i), (1 << i));
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break;
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}
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}
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i--;
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if (i != 4) {
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if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
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return -EBUSY;
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}
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ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
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port = gameport_allocate_port();
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if (!ns558 || !port) {
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printk(KERN_ERR "ns558: Memory allocation failed.\n");
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release_region(io & (-1 << i), (1 << i));
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kfree(ns558);
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gameport_free_port(port);
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return -ENOMEM;
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}
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ns558->io = io;
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ns558->size = 1 << i;
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ns558->gameport = port;
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port->io = io;
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gameport_set_name(port, "NS558 ISA Gameport");
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gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i));
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gameport_register_port(port);
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list_add(&ns558->node, &ns558_list);
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return 0;
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}
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#ifdef CONFIG_PNP
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static const struct pnp_device_id pnp_devids[] = {
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{ .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
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{ .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
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{ .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
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{ .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
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{ .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
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{ .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
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{ .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
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{ .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
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{ .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
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{ .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
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{ .id = "CTL7001", .driver_data = 0 }, /* SB16 */
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{ .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
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{ .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
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{ .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
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{ .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
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{ .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
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{ .id = "ESS6880", .driver_data = 0 }, /* ES688 */
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{ .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
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{ .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
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{ .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
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{ .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
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{ .id = "PNPb02f", .driver_data = 0 }, /* Generic */
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{ .id = "", },
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};
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MODULE_DEVICE_TABLE(pnp, pnp_devids);
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static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
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{
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int ioport, iolen;
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struct ns558 *ns558;
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struct gameport *port;
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if (!pnp_port_valid(dev, 0)) {
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printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
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return -ENODEV;
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}
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ioport = pnp_port_start(dev, 0);
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iolen = pnp_port_len(dev, 0);
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if (!request_region(ioport, iolen, "ns558-pnp"))
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return -EBUSY;
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ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
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port = gameport_allocate_port();
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if (!ns558 || !port) {
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printk(KERN_ERR "ns558: Memory allocation failed\n");
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kfree(ns558);
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gameport_free_port(port);
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return -ENOMEM;
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}
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ns558->io = ioport;
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ns558->size = iolen;
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ns558->dev = dev;
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ns558->gameport = port;
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gameport_set_name(port, "NS558 PnP Gameport");
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gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev));
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port->dev.parent = &dev->dev;
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port->io = ioport;
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gameport_register_port(port);
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list_add_tail(&ns558->node, &ns558_list);
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return 0;
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}
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static struct pnp_driver ns558_pnp_driver = {
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.name = "ns558",
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.id_table = pnp_devids,
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.probe = ns558_pnp_probe,
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};
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#else
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static struct pnp_driver ns558_pnp_driver;
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#endif
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static int __init ns558_init(void)
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{
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int i = 0;
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int error;
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error = pnp_register_driver(&ns558_pnp_driver);
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if (error && error != -ENODEV) /* should be ENOSYS really */
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return error;
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/*
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* Probe ISA ports after PnP, so that PnP ports that are already
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* enabled get detected as PnP. This may be suboptimal in multi-device
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* configurations, but saves hassle with simple setups.
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*/
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while (ns558_isa_portlist[i])
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ns558_isa_probe(ns558_isa_portlist[i++]);
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return list_empty(&ns558_list) && error ? -ENODEV : 0;
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}
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static void __exit ns558_exit(void)
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{
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struct ns558 *ns558, *safe;
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list_for_each_entry_safe(ns558, safe, &ns558_list, node) {
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gameport_unregister_port(ns558->gameport);
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release_region(ns558->io & ~(ns558->size - 1), ns558->size);
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kfree(ns558);
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}
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pnp_unregister_driver(&ns558_pnp_driver);
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}
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module_init(ns558_init);
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module_exit(ns558_exit);
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