1 /* 2 * $Id: turbografx.c,v 1.14 2002/01/22 20:30:39 vojtech Exp $ 3 * 4 * Copyright (c) 1998-2001 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * Steffen Schwenke 8 */ 9 10 /* 11 * TurboGraFX parallel port interface driver for Linux. 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 * 29 * Should you need to contact me, the author, you can do so either by 30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 32 */ 33 34 #include <linux/kernel.h> 35 #include <linux/parport.h> 36 #include <linux/input.h> 37 #include <linux/module.h> 38 #include <linux/moduleparam.h> 39 #include <linux/init.h> 40 41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 42 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver"); 43 MODULE_LICENSE("GPL"); 44 45 static int tgfx[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 }; 46 static int tgfx_nargs __initdata = 0; 47 module_param_array_named(map, tgfx, int, &tgfx_nargs, 0); 48 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>"); 49 50 static int tgfx_2[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 }; 51 static int tgfx_nargs_2 __initdata = 0; 52 module_param_array_named(map2, tgfx_2, int, &tgfx_nargs_2, 0); 53 MODULE_PARM_DESC(map2, "Describes second set of devices"); 54 55 static int tgfx_3[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 }; 56 static int tgfx_nargs_3 __initdata = 0; 57 module_param_array_named(map3, tgfx_3, int, &tgfx_nargs_3, 0); 58 MODULE_PARM_DESC(map3, "Describes third set of devices"); 59 60 __obsolete_setup("tgfx="); 61 __obsolete_setup("tgfx_2="); 62 __obsolete_setup("tgfx_3="); 63 64 #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */ 65 66 #define TGFX_TRIGGER 0x08 67 #define TGFX_UP 0x10 68 #define TGFX_DOWN 0x20 69 #define TGFX_LEFT 0x40 70 #define TGFX_RIGHT 0x80 71 72 #define TGFX_THUMB 0x02 73 #define TGFX_THUMB2 0x04 74 #define TGFX_TOP 0x01 75 #define TGFX_TOP2 0x08 76 77 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 }; 78 static char *tgfx_name = "TurboGraFX Multisystem joystick"; 79 80 static struct tgfx { 81 struct pardevice *pd; 82 struct timer_list timer; 83 struct input_dev dev[7]; 84 char phys[7][32]; 85 int sticks; 86 int used; 87 struct semaphore sem; 88 } *tgfx_base[3]; 89 90 /* 91 * tgfx_timer() reads and analyzes TurboGraFX joystick data. 92 */ 93 94 static void tgfx_timer(unsigned long private) 95 { 96 struct tgfx *tgfx = (void *) private; 97 struct input_dev *dev; 98 int data1, data2, i; 99 100 for (i = 0; i < 7; i++) 101 if (tgfx->sticks & (1 << i)) { 102 103 dev = tgfx->dev + i; 104 105 parport_write_data(tgfx->pd->port, ~(1 << i)); 106 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f; 107 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */ 108 109 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT)); 110 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP )); 111 112 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER)); 113 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB )); 114 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 )); 115 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP )); 116 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 )); 117 118 input_sync(dev); 119 } 120 121 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); 122 } 123 124 static int tgfx_open(struct input_dev *dev) 125 { 126 struct tgfx *tgfx = dev->private; 127 int err; 128 129 err = down_interruptible(&tgfx->sem); 130 if (err) 131 return err; 132 133 if (!tgfx->used++) { 134 parport_claim(tgfx->pd); 135 parport_write_control(tgfx->pd->port, 0x04); 136 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); 137 } 138 139 up(&tgfx->sem); 140 return 0; 141 } 142 143 static void tgfx_close(struct input_dev *dev) 144 { 145 struct tgfx *tgfx = dev->private; 146 147 down(&tgfx->sem); 148 if (!--tgfx->used) { 149 del_timer_sync(&tgfx->timer); 150 parport_write_control(tgfx->pd->port, 0x00); 151 parport_release(tgfx->pd); 152 } 153 up(&tgfx->sem); 154 } 155 156 /* 157 * tgfx_probe() probes for tg gamepads. 158 */ 159 160 static struct tgfx __init *tgfx_probe(int *config, int nargs) 161 { 162 struct tgfx *tgfx; 163 struct parport *pp; 164 int i, j; 165 166 if (config[0] < 0) 167 return NULL; 168 169 if (nargs < 2) { 170 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n"); 171 return NULL; 172 } 173 174 pp = parport_find_number(config[0]); 175 176 if (!pp) { 177 printk(KERN_ERR "turbografx.c: no such parport\n"); 178 return NULL; 179 } 180 181 if (!(tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL))) { 182 parport_put_port(pp); 183 return NULL; 184 } 185 186 init_MUTEX(&tgfx->sem); 187 188 tgfx->pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL); 189 190 parport_put_port(pp); 191 192 if (!tgfx->pd) { 193 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n"); 194 kfree(tgfx); 195 return NULL; 196 } 197 198 init_timer(&tgfx->timer); 199 tgfx->timer.data = (long) tgfx; 200 tgfx->timer.function = tgfx_timer; 201 202 tgfx->sticks = 0; 203 204 for (i = 0; i < nargs - 1; i++) 205 if (config[i+1] > 0 && config[i+1] < 6) { 206 207 tgfx->sticks |= (1 << i); 208 209 tgfx->dev[i].private = tgfx; 210 tgfx->dev[i].open = tgfx_open; 211 tgfx->dev[i].close = tgfx_close; 212 213 sprintf(tgfx->phys[i], "%s/input0", tgfx->pd->port->name); 214 215 tgfx->dev[i].name = tgfx_name; 216 tgfx->dev[i].phys = tgfx->phys[i]; 217 tgfx->dev[i].id.bustype = BUS_PARPORT; 218 tgfx->dev[i].id.vendor = 0x0003; 219 tgfx->dev[i].id.product = config[i+1]; 220 tgfx->dev[i].id.version = 0x0100; 221 222 tgfx->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 223 tgfx->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 224 225 for (j = 0; j < config[i+1]; j++) 226 set_bit(tgfx_buttons[j], tgfx->dev[i].keybit); 227 228 tgfx->dev[i].absmin[ABS_X] = -1; tgfx->dev[i].absmax[ABS_X] = 1; 229 tgfx->dev[i].absmin[ABS_Y] = -1; tgfx->dev[i].absmax[ABS_Y] = 1; 230 231 input_register_device(tgfx->dev + i); 232 printk(KERN_INFO "input: %d-button Multisystem joystick on %s\n", 233 config[i+1], tgfx->pd->port->name); 234 } 235 236 if (!tgfx->sticks) { 237 parport_unregister_device(tgfx->pd); 238 kfree(tgfx); 239 return NULL; 240 } 241 242 return tgfx; 243 } 244 245 static int __init tgfx_init(void) 246 { 247 tgfx_base[0] = tgfx_probe(tgfx, tgfx_nargs); 248 tgfx_base[1] = tgfx_probe(tgfx_2, tgfx_nargs_2); 249 tgfx_base[2] = tgfx_probe(tgfx_3, tgfx_nargs_3); 250 251 if (tgfx_base[0] || tgfx_base[1] || tgfx_base[2]) 252 return 0; 253 254 return -ENODEV; 255 } 256 257 static void __exit tgfx_exit(void) 258 { 259 int i, j; 260 261 for (i = 0; i < 3; i++) 262 if (tgfx_base[i]) { 263 for (j = 0; j < 7; j++) 264 if (tgfx_base[i]->sticks & (1 << j)) 265 input_unregister_device(tgfx_base[i]->dev + j); 266 parport_unregister_device(tgfx_base[i]->pd); 267 } 268 } 269 270 module_init(tgfx_init); 271 module_exit(tgfx_exit); 272