1/* 2 * $Id: turbografx.c,v 1.1.1.1 2007/08/03 18:52:33 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#include <linux/mutex.h> 41 42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 43MODULE_DESCRIPTION("TurboGraFX parallel port interface driver"); 44MODULE_LICENSE("GPL"); 45 46#define TGFX_MAX_PORTS 3 47#define TGFX_MAX_DEVICES 7 48 49struct tgfx_config { 50 int args[TGFX_MAX_DEVICES + 1]; 51 unsigned int nargs; 52}; 53 54static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata; 55 56module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0); 57MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>"); 58module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0); 59MODULE_PARM_DESC(map2, "Describes second set of devices"); 60module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0); 61MODULE_PARM_DESC(map3, "Describes third set of devices"); 62 63#define TGFX_REFRESH_TIME HZ/100 /* 10 ms */ 64 65#define TGFX_TRIGGER 0x08 66#define TGFX_UP 0x10 67#define TGFX_DOWN 0x20 68#define TGFX_LEFT 0x40 69#define TGFX_RIGHT 0x80 70 71#define TGFX_THUMB 0x02 72#define TGFX_THUMB2 0x04 73#define TGFX_TOP 0x01 74#define TGFX_TOP2 0x08 75 76static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 }; 77 78static struct tgfx { 79 struct pardevice *pd; 80 struct timer_list timer; 81 struct input_dev *dev[TGFX_MAX_DEVICES]; 82 char name[TGFX_MAX_DEVICES][64]; 83 char phys[TGFX_MAX_DEVICES][32]; 84 int sticks; 85 int used; 86 struct mutex sem; 87} *tgfx_base[TGFX_MAX_PORTS]; 88 89/* 90 * tgfx_timer() reads and analyzes TurboGraFX joystick data. 91 */ 92 93static 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 123static int tgfx_open(struct input_dev *dev) 124{ 125 struct tgfx *tgfx = input_get_drvdata(dev); 126 int err; 127 128 err = mutex_lock_interruptible(&tgfx->sem); 129 if (err) 130 return err; 131 132 if (!tgfx->used++) { 133 parport_claim(tgfx->pd); 134 parport_write_control(tgfx->pd->port, 0x04); 135 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); 136 } 137 138 mutex_unlock(&tgfx->sem); 139 return 0; 140} 141 142static void tgfx_close(struct input_dev *dev) 143{ 144 struct tgfx *tgfx = input_get_drvdata(dev); 145 146 mutex_lock(&tgfx->sem); 147 if (!--tgfx->used) { 148 del_timer_sync(&tgfx->timer); 149 parport_write_control(tgfx->pd->port, 0x00); 150 parport_release(tgfx->pd); 151 } 152 mutex_unlock(&tgfx->sem); 153} 154 155 156 157/* 158 * tgfx_probe() probes for tg gamepads. 159 */ 160 161static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs) 162{ 163 struct tgfx *tgfx; 164 struct input_dev *input_dev; 165 struct parport *pp; 166 struct pardevice *pd; 167 int i, j; 168 int err; 169 170 pp = parport_find_number(parport); 171 if (!pp) { 172 printk(KERN_ERR "turbografx.c: no such parport\n"); 173 err = -EINVAL; 174 goto err_out; 175 } 176 177 pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL); 178 if (!pd) { 179 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n"); 180 err = -EBUSY; 181 goto err_put_pp; 182 } 183 184 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL); 185 if (!tgfx) { 186 printk(KERN_ERR "turbografx.c: Not enough memory\n"); 187 err = -ENOMEM; 188 goto err_unreg_pardev; 189 } 190 191 mutex_init(&tgfx->sem); 192 tgfx->pd = pd; 193 init_timer(&tgfx->timer); 194 tgfx->timer.data = (long) tgfx; 195 tgfx->timer.function = tgfx_timer; 196 197 for (i = 0; i < n_devs; i++) { 198 if (n_buttons[i] < 1) 199 continue; 200 201 if (n_buttons[i] > 6) { 202 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]); 203 err = -EINVAL; 204 goto err_unreg_devs; 205 } 206 207 tgfx->dev[i] = input_dev = input_allocate_device(); 208 if (!input_dev) { 209 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n"); 210 err = -ENOMEM; 211 goto err_unreg_devs; 212 } 213 214 tgfx->sticks |= (1 << i); 215 snprintf(tgfx->name[i], sizeof(tgfx->name[i]), 216 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]); 217 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]), 218 "%s/input%d", tgfx->pd->port->name, i); 219 220 input_dev->name = tgfx->name[i]; 221 input_dev->phys = tgfx->phys[i]; 222 input_dev->id.bustype = BUS_PARPORT; 223 input_dev->id.vendor = 0x0003; 224 input_dev->id.product = n_buttons[i]; 225 input_dev->id.version = 0x0100; 226 227 input_set_drvdata(input_dev, tgfx); 228 229 input_dev->open = tgfx_open; 230 input_dev->close = tgfx_close; 231 232 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 233 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0); 234 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0); 235 236 for (j = 0; j < n_buttons[i]; j++) 237 set_bit(tgfx_buttons[j], input_dev->keybit); 238 239 err = input_register_device(tgfx->dev[i]); 240 if (err) 241 goto err_free_dev; 242 } 243 244 if (!tgfx->sticks) { 245 printk(KERN_ERR "turbografx.c: No valid devices specified\n"); 246 err = -EINVAL; 247 goto err_free_tgfx; 248 } 249 250 return tgfx; 251 252 err_free_dev: 253 input_free_device(tgfx->dev[i]); 254 err_unreg_devs: 255 while (--i >= 0) 256 if (tgfx->dev[i]) 257 input_unregister_device(tgfx->dev[i]); 258 err_free_tgfx: 259 kfree(tgfx); 260 err_unreg_pardev: 261 parport_unregister_device(pd); 262 err_put_pp: 263 parport_put_port(pp); 264 err_out: 265 return ERR_PTR(err); 266} 267 268static void tgfx_remove(struct tgfx *tgfx) 269{ 270 int i; 271 272 for (i = 0; i < TGFX_MAX_DEVICES; i++) 273 if (tgfx->dev[i]) 274 input_unregister_device(tgfx->dev[i]); 275 parport_unregister_device(tgfx->pd); 276 kfree(tgfx); 277} 278 279static int __init tgfx_init(void) 280{ 281 int i; 282 int have_dev = 0; 283 int err = 0; 284 285 for (i = 0; i < TGFX_MAX_PORTS; i++) { 286 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0) 287 continue; 288 289 if (tgfx_cfg[i].nargs < 2) { 290 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n"); 291 err = -EINVAL; 292 break; 293 } 294 295 tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0], 296 tgfx_cfg[i].args + 1, 297 tgfx_cfg[i].nargs - 1); 298 if (IS_ERR(tgfx_base[i])) { 299 err = PTR_ERR(tgfx_base[i]); 300 break; 301 } 302 303 have_dev = 1; 304 } 305 306 if (err) { 307 while (--i >= 0) 308 if (tgfx_base[i]) 309 tgfx_remove(tgfx_base[i]); 310 return err; 311 } 312 313 return have_dev ? 0 : -ENODEV; 314} 315 316static void __exit tgfx_exit(void) 317{ 318 int i; 319 320 for (i = 0; i < TGFX_MAX_PORTS; i++) 321 if (tgfx_base[i]) 322 tgfx_remove(tgfx_base[i]); 323} 324 325module_init(tgfx_init); 326module_exit(tgfx_exit); 327