diff options
Diffstat (limited to 'drivers/char/joystick/joy-analog.c')
| -rw-r--r-- | drivers/char/joystick/joy-analog.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/drivers/char/joystick/joy-analog.c b/drivers/char/joystick/joy-analog.c deleted file mode 100644 index f73ee8ded..000000000 --- a/drivers/char/joystick/joy-analog.c +++ /dev/null @@ -1,295 +0,0 @@ -/* - * joy-analog.c Version 1.2 - * - * Copyright (c) 1996-1999 Vojtech Pavlik - * - * Sponsored by SuSE - */ - -/* - * This is a module for the Linux joystick driver, supporting - * up to two analog (or CHF/FCS) joysticks on a single joystick port. - */ - -/* - * 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@suse.cz>, or by paper mail: - * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic - */ - -#include <asm/io.h> -#include <asm/param.h> -#include <asm/system.h> -#include <linux/config.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/joystick.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/init.h> - -#define JS_AN_MAX_TIME 3000 /* 3 ms */ -#define JS_AN_LOOP_TIME 2000 /* 2 t */ - -static int js_an_port_list[] __initdata = {0x201, 0}; -static struct js_port* js_an_port __initdata = NULL; - -MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); -MODULE_PARM(js_an, "2-24i"); - -static int __initdata js_an[] = { -1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0,-1,0,0 }; - -#include "joy-analog.h" - -struct js_ax_info { - int io; - int speed; - int loop; - int timeout; - struct js_an_info an; -}; - -/* - * Time macros. - */ - -#ifdef __i386__ -#ifdef CONFIG_X86_TSC -#define GET_TIME(x) __asm__ __volatile__ ( "rdtsc" : "=a" (x) : : "dx" ) -#define DELTA(x,y) ((x)-(y)) -#define TIME_NAME "TSC" -#else -#define GET_TIME(x) do { outb(0, 0x43); x = inb(0x40); x |= inb(0x40) << 8; } while (0) -#define DELTA(x,y) ((y)-(x)+((y)<(x)?1193180L/HZ:0)) -#define TIME_NAME "PIT" -#endif -#elif __alpha__ -#define GET_TIME(x) __asm__ __volatile__ ( "rpcc %0" : "=r" (x) ) -#define DELTA(x,y) ((x)-(y)) -#define TIME_NAME "PCC" -#endif - -#ifndef GET_TIME -#define FAKE_TIME -static unsigned long js_an_faketime = 0; -#define GET_TIME(x) do { x = js_an_faketime++; } while(0) -#define DELTA(x,y) ((x)-(y)) -#define TIME_NAME "Unreliable" -#endif - -/* - * js_an_read() reads analog joystick data. - */ - -static int js_an_read(void *xinfo, int **axes, int **buttons) -{ - struct js_ax_info *info = xinfo; - struct js_an_info *an = &info->an; - int io = info->io; - unsigned long flags; - unsigned char buf[4]; - unsigned int time[4]; - unsigned char u, v, w; - unsigned int p, q, r, s, t; - int i, j; - - an->buttons = ~inb(io) >> 4; - - i = 0; - w = ((an->mask[0] | an->mask[1]) & JS_AN_AXES_STD) | (an->extensions & JS_AN_HAT_FCS) - | ((an->extensions & JS_AN_BUTTONS_PXY_XY) >> 2) | ((an->extensions & JS_AN_BUTTONS_PXY_UV) >> 4); - p = info->loop; - q = info->timeout; - - __save_flags(flags); - __cli(); - outb(0xff,io); - GET_TIME(r); - __restore_flags(flags); - t = r; - v = w; - do { - s = t; - u = v; - __cli(); - v = inb(io) & w; - GET_TIME(t); - __restore_flags(flags); - if ((u ^ v) && (DELTA(t,s) < p)) { - time[i] = t; - buf[i] = u ^ v; - i++; - } - } while (v && (i < 4) && (DELTA(t,r) < q)); - - v <<= 4; - - for (--i; i >= 0; i--) { - v |= buf[i]; - for (j = 0; j < 4; j++) - if (buf[i] & (1 << j)) an->axes[j] = (DELTA(time[i],r) << 10) / info->speed; - } - - js_an_decode(an, axes, buttons); - - return -(v != w); -} - -/* - * js_an_calibrate_timer() calibrates the timer and computes loop - * and timeout values for a joystick port. - */ - -static void __init js_an_calibrate_timer(struct js_ax_info *info) -{ - unsigned int i, t, tx, t1, t2, t3; - unsigned long flags; - int io = info->io; - - save_flags(flags); - cli(); - GET_TIME(t1); -#ifdef FAKE_TIME - js_an_faketime += 830; -#endif - udelay(1000); - GET_TIME(t2); - GET_TIME(t3); - restore_flags(flags); - - info->speed = DELTA(t2, t1) - DELTA(t3, t2); - - tx = 1 << 30; - - for(i = 0; i < 50; i++) { - save_flags(flags); - cli(); - GET_TIME(t1); - for(t = 0; t < 50; t++) { inb(io); GET_TIME(t2); } - GET_TIME(t3); - restore_flags(flags); - udelay(i); - if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t; - } - - info->loop = (JS_AN_LOOP_TIME * t) / 50000; - info->timeout = (JS_AN_MAX_TIME * info->speed) / 1000; -} - -/* - * js_an_probe() probes for analog joysticks. - */ - -static struct js_port __init *js_an_probe(int io, int mask0, int mask1, struct js_port *port) -{ - struct js_ax_info info, *ax; - int i, numdev; - unsigned char u; - - if (io < 0) return port; - - if (check_region(io, 1)) return port; - - outb(0xff,io); - u = inb(io); - udelay(JS_AN_MAX_TIME); - u = (inb(io) ^ u) & u; - - if (!u) return port; - if (u & 0xf0) return port; - - if ((numdev = js_an_probe_devs(&info.an, u, mask0, mask1, port)) <= 0) - return port; - - info.io = io; - js_an_calibrate_timer(&info); - - request_region(info.io, 1, "joystick (analog)"); - port = js_register_port(port, &info, numdev, sizeof(struct js_ax_info), js_an_read); - ax = port->info; - - for (i = 0; i < numdev; i++) - printk(KERN_INFO "js%d: %s at %#x ["TIME_NAME" timer, %d %sHz clock, %d ns res]\n", - js_register_device(port, i, js_an_axes(i, &ax->an), js_an_buttons(i, &ax->an), - js_an_name(i, &ax->an), THIS_MODULE, NULL, NULL), - js_an_name(i, &ax->an), - ax->io, - ax->speed > 10000 ? (ax->speed + 800) / 1000 : ax->speed, - ax->speed > 10000 ? "M" : "k", - ax->loop * 1000000000 / JS_AN_LOOP_TIME / ax->speed); - - js_an_read(ax, port->axes, port->buttons); - js_an_init_corr(&ax->an, port->axes, port->corr, 8); - - return port; -} - -#ifndef MODULE -int __init js_an_setup(SETUP_PARAM) -{ - int i; - SETUP_PARSE(24); - for (i = 0; i <= ints[0] && i < 24; i++) js_an[i] = ints[i+1]; - return 1; -} -__setup("js_an=", js_an_setup); -#endif - -#ifdef MODULE -int init_module(void) -#else -int __init js_an_init(void) -#endif -{ - int i; - - if (js_an[0] >= 0) { - for (i = 0; (js_an[i*3] >= 0) && i < 8; i++) - js_an_port = js_an_probe(js_an[i*3], js_an[i*3+1], js_an[i*3+2], js_an_port); - } else { - for (i = 0; js_an_port_list[i]; i++) - js_an_port = js_an_probe(js_an_port_list[i], 0, 0, js_an_port); - } - if (js_an_port) return 0; - -#ifdef MODULE - printk(KERN_WARNING "joy-analog: no joysticks found\n"); -#endif - - return -ENODEV; -} - -#ifdef MODULE -void cleanup_module(void) -{ - int i; - struct js_ax_info *info; - - while (js_an_port) { - for (i = 0; i < js_an_port->ndevs; i++) - if (js_an_port->devs[i]) - js_unregister_device(js_an_port->devs[i]); - info = js_an_port->info; - release_region(info->io, 1); - js_an_port = js_unregister_port(js_an_port); - } - -} -#endif |