gf2k.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:9k
- /*
- * $Id: gf2k.c,v 1.12 2000/06/04 14:53:44 vojtech Exp $
- *
- * Copyright (c) 1998-2000 Vojtech Pavlik
- *
- * Sponsored by SuSE
- */
- /*
- * Genius Flight 2000 joystick 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@suse.cz>, or by paper mail:
- * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
- */
- #include <linux/delay.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/input.h>
- #include <linux/gameport.h>
- #define GF2K_START 400 /* The time we wait for the first bit [400 us] */
- #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
- #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
- #define GF2K_LENGTH 80 /* Max number of triplets in a packet */
- #define GF2K_REFRESH HZ/50 /* Time between joystick polls [20 ms] */
- /*
- * Genius joystick ids ...
- */
- #define GF2K_ID_G09 1
- #define GF2K_ID_F30D 2
- #define GF2K_ID_F30 3
- #define GF2K_ID_F31D 4
- #define GF2K_ID_F305 5
- #define GF2K_ID_F23P 6
- #define GF2K_ID_F31 7
- #define GF2K_ID_MAX 7
- static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
- static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
- static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
- "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
- static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
- static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
- static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
- static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
- static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
- static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
- static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
- static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
- static short gf2k_seq_reset[] = { 240, 340, 0 };
- static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
- struct gf2k {
- struct gameport *gameport;
- struct timer_list timer;
- struct input_dev dev;
- int reads;
- int bads;
- int used;
- unsigned char id;
- unsigned char length;
- };
- /*
- * gf2k_read_packet() reads a Genius Flight2000 packet.
- */
- static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
- {
- unsigned char u, v;
- int i;
- unsigned int t, p;
- unsigned long flags;
- t = gameport_time(gameport, GF2K_START);
- p = gameport_time(gameport, GF2K_STROBE);
- i = 0;
- __save_flags(flags);
- __cli();
- gameport_trigger(gameport);
- v = gameport_read(gameport);;
- while (t > 0 && i < length) {
- t--; u = v;
- v = gameport_read(gameport);
- if (v & ~u & 0x10) {
- data[i++] = v >> 5;
- t = p;
- }
- }
- __restore_flags(flags);
- return i;
- }
- /*
- * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
- * into digital mode.
- */
- static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
- {
- unsigned long flags;
- int i, t;
- __save_flags(flags);
- __cli();
- i = 0;
- do {
- gameport_trigger(gameport);
- t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
- while ((gameport_read(gameport) & 1) && t) t--;
- udelay(seq[i]);
- } while (seq[++i]);
- gameport_trigger(gameport);
- __restore_flags(flags);
- }
- /*
- * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
- * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
- * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
- * is number of bits per triplet.
- */
- #define GB(p,n,s) gf2k_get_bits(data, p, n, s)
- static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
- {
- __u64 data = 0;
- int i;
- for (i = 0; i < num / 3 + 2; i++)
- data |= buf[pos / 3 + i] << (i * 3);
- data >>= pos % 3;
- data &= (1 << num) - 1;
- data <<= shift;
- return data;
- }
- static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
- {
- struct input_dev *dev = &gf2k->dev;
- int i, t;
- for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
- input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
- for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
- input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
- t = GB(40,4,0);
- for (i = 0; i < gf2k_hats[gf2k->id]; i++)
- input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
- t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
- for (i = 0; i < gf2k_joys[gf2k->id]; i++)
- input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
- for (i = 0; i < gf2k_pads[gf2k->id]; i++)
- input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
- }
- /*
- * gf2k_timer() reads and analyzes Genius joystick data.
- */
- static void gf2k_timer(unsigned long private)
- {
- struct gf2k *gf2k = (void *) private;
- unsigned char data[GF2K_LENGTH];
- gf2k->reads++;
- if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) {
- gf2k->bads++;
- } else gf2k_read(gf2k, data);
- mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
- }
- static int gf2k_open(struct input_dev *dev)
- {
- struct gf2k *gf2k = dev->private;
- if (!gf2k->used++)
- mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
- return 0;
- }
- static void gf2k_close(struct input_dev *dev)
- {
- struct gf2k *gf2k = dev->private;
- if (!--gf2k->used)
- del_timer(&gf2k->timer);
- }
- /*
- * gf2k_connect() probes for Genius id joysticks.
- */
- static void gf2k_connect(struct gameport *gameport, struct gameport_dev *dev)
- {
- struct gf2k *gf2k;
- unsigned char data[GF2K_LENGTH];
- int i;
- if (!(gf2k = kmalloc(sizeof(struct gf2k), GFP_KERNEL)))
- return;
- memset(gf2k, 0, sizeof(struct gf2k));
- gameport->private = gf2k;
- gf2k->gameport = gameport;
- init_timer(&gf2k->timer);
- gf2k->timer.data = (long) gf2k;
- gf2k->timer.function = gf2k_timer;
- if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
- goto fail1;
- gf2k_trigger_seq(gameport, gf2k_seq_reset);
- wait_ms(GF2K_TIMEOUT);
- gf2k_trigger_seq(gameport, gf2k_seq_digital);
- wait_ms(GF2K_TIMEOUT);
- if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12)
- goto fail2;
- if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5)))
- goto fail2;
- #ifdef RESET_WORKS
- if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||
- (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5))))
- goto fail2;
- #else
- gf2k->id = 6;
- #endif
- if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
- printk(KERN_WARNING "gf2k.c: Not yet supported joystick on gameport%d. [id: %d type:%s]n",
- gameport->number, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
- goto fail2;
- }
- gf2k->length = gf2k_lens[gf2k->id];
- gf2k->dev.private = gf2k;
- gf2k->dev.open = gf2k_open;
- gf2k->dev.close = gf2k_close;
- gf2k->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- gf2k->dev.name = gf2k_names[gf2k->id];
- gf2k->dev.idbus = BUS_GAMEPORT;
- gf2k->dev.idvendor = GAMEPORT_ID_VENDOR_GENIUS;
- gf2k->dev.idproduct = gf2k->id;
- gf2k->dev.idversion = 0x0100;
- for (i = 0; i < gf2k_axes[gf2k->id]; i++)
- set_bit(gf2k_abs[i], gf2k->dev.absbit);
- for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
- set_bit(ABS_HAT0X + i, gf2k->dev.absbit);
- gf2k->dev.absmin[ABS_HAT0X + i] = -1;
- gf2k->dev.absmax[ABS_HAT0X + i] = 1;
- }
- for (i = 0; i < gf2k_joys[gf2k->id]; i++)
- set_bit(gf2k_btn_joy[i], gf2k->dev.keybit);
- for (i = 0; i < gf2k_pads[gf2k->id]; i++)
- set_bit(gf2k_btn_pad[i], gf2k->dev.keybit);
- gf2k_read_packet(gameport, gf2k->length, data);
- gf2k_read(gf2k, data);
- for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
- gf2k->dev.absmax[gf2k_abs[i]] = (i < 2) ? gf2k->dev.abs[gf2k_abs[i]] * 2 - 32 :
- gf2k->dev.abs[gf2k_abs[0]] + gf2k->dev.abs[gf2k_abs[1]] - 32;
- gf2k->dev.absmin[gf2k_abs[i]] = 32;
- gf2k->dev.absfuzz[gf2k_abs[i]] = 8;
- gf2k->dev.absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
- }
- input_register_device(&gf2k->dev);
- printk(KERN_INFO "input%d: %s on gameport%d.0n",
- gf2k->dev.number, gf2k_names[gf2k->id], gameport->number);
- return;
- fail2: gameport_close(gameport);
- fail1: kfree(gf2k);
- }
- static void gf2k_disconnect(struct gameport *gameport)
- {
- struct gf2k *gf2k = gameport->private;
- input_unregister_device(&gf2k->dev);
- gameport_close(gameport);
- kfree(gf2k);
- }
- static struct gameport_dev gf2k_dev = {
- connect: gf2k_connect,
- disconnect: gf2k_disconnect,
- };
- int __init gf2k_init(void)
- {
- gameport_register_device(&gf2k_dev);
- return 0;
- }
- void __exit gf2k_exit(void)
- {
- gameport_unregister_device(&gf2k_dev);
- }
- module_init(gf2k_init);
- module_exit(gf2k_exit);
- MODULE_LICENSE("GPL");