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 } *tgfx_base[3]; 88 89 /* 90 * tgfx_timer() reads and analyzes TurboGraFX joystick data. 91 */ 92 93 static void tgfx_timer(unsigned long private) 94 { 95 struct tgfx *tgfx = (void *) private; 96 struct input_dev *dev; 97 int data1, data2, i; 98 99 for (i = 0; i < 7; i++) 100 if (tgfx->sticks & (1 << i)) { 101 102 dev = tgfx->dev + i; 103 104 parport_write_data(tgfx->pd->port, ~(1 << i)); 105 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f; 106 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */ 107 108 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT)); 109 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP )); 110 111 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER)); 112 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB )); 113 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 )); 114 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP )); 115 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 )); 116 117 input_sync(dev); 118 } 119 120 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); 121 } 122 123 static int tgfx_open(struct input_dev *dev) 124 { 125 struct tgfx *tgfx = dev->private; 126 if (!tgfx->used++) { 127 parport_claim(tgfx->pd); 128 parport_write_control(tgfx->pd->port, 0x04); 129 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); 130 } 131 return 0; 132 } 133 134 static void tgfx_close(struct input_dev *dev) 135 { 136 struct tgfx *tgfx = dev->private; 137 if (!--tgfx->used) { 138 del_timer(&tgfx->timer); 139 parport_write_control(tgfx->pd->port, 0x00); 140 parport_release(tgfx->pd); 141 } 142 } 143 144 /* 145 * tgfx_probe() probes for tg gamepads. 146 */ 147 148 static struct tgfx __init *tgfx_probe(int *config, int nargs) 149 { 150 struct tgfx *tgfx; 151 struct parport *pp; 152 int i, j; 153 154 if (config[0] < 0) 155 return NULL; 156 157 if (nargs < 2) { 158 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n"); 159 return NULL; 160 } 161 162 pp = parport_find_number(config[0]); 163 164 if (!pp) { 165 printk(KERN_ERR "turbografx.c: no such parport\n"); 166 return NULL; 167 } 168 169 if (!(tgfx = kmalloc(sizeof(struct tgfx), GFP_KERNEL))) { 170 parport_put_port(pp); 171 return NULL; 172 } 173 memset(tgfx, 0, sizeof(struct tgfx)); 174 175 tgfx->pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL); 176 177 parport_put_port(pp); 178 179 if (!tgfx->pd) { 180 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n"); 181 kfree(tgfx); 182 return NULL; 183 } 184 185 init_timer(&tgfx->timer); 186 tgfx->timer.data = (long) tgfx; 187 tgfx->timer.function = tgfx_timer; 188 189 tgfx->sticks = 0; 190 191 for (i = 0; i < nargs - 1; i++) 192 if (config[i+1] > 0 && config[i+1] < 6) { 193 194 tgfx->sticks |= (1 << i); 195 196 tgfx->dev[i].private = tgfx; 197 tgfx->dev[i].open = tgfx_open; 198 tgfx->dev[i].close = tgfx_close; 199 200 sprintf(tgfx->phys[i], "%s/input0", tgfx->pd->port->name); 201 202 tgfx->dev[i].name = tgfx_name; 203 tgfx->dev[i].phys = tgfx->phys[i]; 204 tgfx->dev[i].id.bustype = BUS_PARPORT; 205 tgfx->dev[i].id.vendor = 0x0003; 206 tgfx->dev[i].id.product = config[i+1]; 207 tgfx->dev[i].id.version = 0x0100; 208 209 tgfx->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 210 tgfx->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 211 212 for (j = 0; j < config[i+1]; j++) 213 set_bit(tgfx_buttons[j], tgfx->dev[i].keybit); 214 215 tgfx->dev[i].absmin[ABS_X] = -1; tgfx->dev[i].absmax[ABS_X] = 1; 216 tgfx->dev[i].absmin[ABS_Y] = -1; tgfx->dev[i].absmax[ABS_Y] = 1; 217 218 input_register_device(tgfx->dev + i); 219 printk(KERN_INFO "input: %d-button Multisystem joystick on %s\n", 220 config[i+1], tgfx->pd->port->name); 221 } 222 223 if (!tgfx->sticks) { 224 parport_unregister_device(tgfx->pd); 225 kfree(tgfx); 226 return NULL; 227 } 228 229 return tgfx; 230 } 231 232 static int __init tgfx_init(void) 233 { 234 tgfx_base[0] = tgfx_probe(tgfx, tgfx_nargs); 235 tgfx_base[1] = tgfx_probe(tgfx_2, tgfx_nargs_2); 236 tgfx_base[2] = tgfx_probe(tgfx_3, tgfx_nargs_3); 237 238 if (tgfx_base[0] || tgfx_base[1] || tgfx_base[2]) 239 return 0; 240 241 return -ENODEV; 242 } 243 244 static void __exit tgfx_exit(void) 245 { 246 int i, j; 247 248 for (i = 0; i < 3; i++) 249 if (tgfx_base[i]) { 250 for (j = 0; j < 7; j++) 251 if (tgfx_base[i]->sticks & (1 << j)) 252 input_unregister_device(tgfx_base[i]->dev + j); 253 parport_unregister_device(tgfx_base[i]->pd); 254 } 255 } 256 257 module_init(tgfx_init); 258 module_exit(tgfx_exit); 259