| /* |
| * $Id: lightning.c,v 1.20 2002/01/22 20:41:31 vojtech Exp $ |
| * |
| * Copyright (c) 1998-2001 Vojtech Pavlik |
| */ |
| |
| /* |
| * PDPI Lightning 4 gamecard 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/delay.h> |
| #include <linux/errno.h> |
| #include <linux/ioport.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/gameport.h> |
| #include <linux/slab.h> |
| |
| #define L4_PORT 0x201 |
| #define L4_SELECT_ANALOG 0xa4 |
| #define L4_SELECT_DIGITAL 0xa5 |
| #define L4_SELECT_SECONDARY 0xa6 |
| #define L4_CMD_ID 0x80 |
| #define L4_CMD_GETCAL 0x92 |
| #define L4_CMD_SETCAL 0x93 |
| #define L4_ID 0x04 |
| #define L4_BUSY 0x01 |
| #define L4_TIMEOUT 80 /* 80 us */ |
| |
| MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver"); |
| MODULE_LICENSE("GPL"); |
| |
| struct l4 { |
| struct gameport gameport; |
| unsigned char port; |
| char phys[32]; |
| } *l4_port[8]; |
| |
| char l4_name[] = "PDPI Lightning 4"; |
| |
| /* |
| * l4_wait_ready() waits for the L4 to become ready. |
| */ |
| |
| static int l4_wait_ready(void) |
| { |
| unsigned int t; |
| t = L4_TIMEOUT; |
| while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--; |
| return -(t<=0); |
| } |
| |
| /* |
| * l4_cooked_read() reads data from the Lightning 4. |
| */ |
| |
| static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons) |
| { |
| struct l4 *l4 = gameport->driver; |
| unsigned char status; |
| int i, result = -1; |
| |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT); |
| |
| if (inb(L4_PORT) & L4_BUSY) goto fail; |
| outb(l4->port & 3, L4_PORT); |
| |
| if (l4_wait_ready()) goto fail; |
| status = inb(L4_PORT); |
| |
| for (i = 0; i < 4; i++) |
| if (status & (1 << i)) { |
| if (l4_wait_ready()) goto fail; |
| axes[i] = inb(L4_PORT); |
| if (axes[i] > 252) axes[i] = -1; |
| } |
| |
| if (status & 0x10) { |
| if (l4_wait_ready()) goto fail; |
| *buttons = inb(L4_PORT) & 0x0f; |
| } |
| |
| result = 0; |
| |
| fail: outb(L4_SELECT_ANALOG, L4_PORT); |
| return result; |
| } |
| |
| static int l4_open(struct gameport *gameport, int mode) |
| { |
| struct l4 *l4 = gameport->driver; |
| if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED) |
| return -1; |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| return 0; |
| } |
| |
| /* |
| * l4_getcal() reads the L4 with calibration values. |
| */ |
| |
| static int l4_getcal(int port, int *cal) |
| { |
| int i, result = -1; |
| |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT); |
| |
| if (inb(L4_PORT) & L4_BUSY) goto fail; |
| outb(L4_CMD_GETCAL, L4_PORT); |
| |
| if (l4_wait_ready()) goto fail; |
| if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail; |
| |
| if (l4_wait_ready()) goto fail; |
| outb(port & 3, L4_PORT); |
| |
| for (i = 0; i < 4; i++) { |
| if (l4_wait_ready()) goto fail; |
| cal[i] = inb(L4_PORT); |
| } |
| |
| result = 0; |
| |
| fail: outb(L4_SELECT_ANALOG, L4_PORT); |
| return result; |
| } |
| |
| /* |
| * l4_setcal() programs the L4 with calibration values. |
| */ |
| |
| static int l4_setcal(int port, int *cal) |
| { |
| int i, result = -1; |
| |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT); |
| |
| if (inb(L4_PORT) & L4_BUSY) goto fail; |
| outb(L4_CMD_SETCAL, L4_PORT); |
| |
| if (l4_wait_ready()) goto fail; |
| if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail; |
| |
| if (l4_wait_ready()) goto fail; |
| outb(port & 3, L4_PORT); |
| |
| for (i = 0; i < 4; i++) { |
| if (l4_wait_ready()) goto fail; |
| outb(cal[i], L4_PORT); |
| } |
| |
| result = 0; |
| |
| fail: outb(L4_SELECT_ANALOG, L4_PORT); |
| return result; |
| } |
| |
| /* |
| * l4_calibrate() calibrates the L4 for the attached device, so |
| * that the device's resistance fits into the L4's 8-bit range. |
| */ |
| |
| static int l4_calibrate(struct gameport *gameport, int *axes, int *max) |
| { |
| int i, t; |
| int cal[4]; |
| struct l4 *l4 = gameport->driver; |
| |
| if (l4_getcal(l4->port, cal)) |
| return -1; |
| |
| for (i = 0; i < 4; i++) { |
| t = (max[i] * cal[i]) / 200; |
| t = (t < 1) ? 1 : ((t > 255) ? 255 : t); |
| axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t; |
| axes[i] = (axes[i] > 252) ? 252 : axes[i]; |
| cal[i] = t; |
| } |
| |
| if (l4_setcal(l4->port, cal)) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int __init l4_init(void) |
| { |
| int cal[4] = {255,255,255,255}; |
| int i, j, rev, cards = 0; |
| struct gameport *gameport; |
| struct l4 *l4; |
| |
| if (!request_region(L4_PORT, 1, "lightning")) |
| return -1; |
| |
| for (i = 0; i < 2; i++) { |
| |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| outb(L4_SELECT_DIGITAL + i, L4_PORT); |
| |
| if (inb(L4_PORT) & L4_BUSY) continue; |
| outb(L4_CMD_ID, L4_PORT); |
| |
| if (l4_wait_ready()) continue; |
| if (inb(L4_PORT) != L4_SELECT_DIGITAL + i) continue; |
| |
| if (l4_wait_ready()) continue; |
| if (inb(L4_PORT) != L4_ID) continue; |
| |
| if (l4_wait_ready()) continue; |
| rev = inb(L4_PORT); |
| |
| if (!rev) continue; |
| |
| if (!(l4_port[i * 4] = kmalloc(sizeof(struct l4) * 4, GFP_KERNEL))) { |
| printk(KERN_ERR "lightning: Out of memory allocating ports.\n"); |
| continue; |
| } |
| memset(l4_port[i * 4], 0, sizeof(struct l4) * 4); |
| |
| for (j = 0; j < 4; j++) { |
| |
| l4 = l4_port[i * 4 + j] = l4_port[i * 4] + j; |
| l4->port = i * 4 + j; |
| |
| sprintf(l4->phys, "isa%04x/gameport%d", L4_PORT, 4 * i + j); |
| |
| gameport = &l4->gameport; |
| gameport->driver = l4; |
| gameport->open = l4_open; |
| gameport->cooked_read = l4_cooked_read; |
| gameport->calibrate = l4_calibrate; |
| |
| gameport->name = l4_name; |
| gameport->phys = l4->phys; |
| gameport->id.bustype = BUS_ISA; |
| |
| if (!i && !j) |
| gameport->io = L4_PORT; |
| |
| if (rev > 0x28) /* on 2.9+ the setcal command works correctly */ |
| l4_setcal(l4->port, cal); |
| |
| gameport_register_port(gameport); |
| } |
| |
| printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n", |
| i ? "secondary" : "primary", rev >> 4, rev, L4_PORT); |
| |
| cards++; |
| } |
| |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| |
| if (!cards) { |
| release_region(L4_PORT, 1); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit l4_exit(void) |
| { |
| int i; |
| int cal[4] = {59, 59, 59, 59}; |
| |
| for (i = 0; i < 8; i++) |
| if (l4_port[i]) { |
| l4_setcal(l4_port[i]->port, cal); |
| gameport_unregister_port(&l4_port[i]->gameport); |
| } |
| outb(L4_SELECT_ANALOG, L4_PORT); |
| release_region(L4_PORT, 1); |
| } |
| |
| module_init(l4_init); |
| module_exit(l4_exit); |