/* * Copyright (c) 1998-2001 Vojtech Pavlik * * Based on the work of: * Steffen Schwenke */ /* * TurboGraFX parallel port interface 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@ucw.cz>, or by paper mail: * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic */ #include <linux/kernel.h> #include <linux/parport.h> #include <linux/input.h> #include <linux/module.h> #include <linux/init.h> #include <linux/mutex.h> #include <linux/slab.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); MODULE_DESCRIPTION("TurboGraFX parallel port interface driver"); MODULE_LICENSE("GPL"); #define TGFX_MAX_PORTS 3 #define TGFX_MAX_DEVICES 7 struct tgfx_config { int args[TGFX_MAX_DEVICES + 1]; unsigned int nargs; }; static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata; module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0); MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>"); module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0); MODULE_PARM_DESC(map2, "Describes second set of devices"); module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0); MODULE_PARM_DESC(map3, "Describes third set of devices"); #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */ #define TGFX_TRIGGER 0x08 #define TGFX_UP 0x10 #define TGFX_DOWN 0x20 #define TGFX_LEFT 0x40 #define TGFX_RIGHT 0x80 #define TGFX_THUMB 0x02 #define TGFX_THUMB2 0x04 #define TGFX_TOP 0x01 #define TGFX_TOP2 0x08 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 }; static struct tgfx { struct pardevice *pd; struct timer_list timer; struct input_dev *dev[TGFX_MAX_DEVICES]; char name[TGFX_MAX_DEVICES][64]; char phys[TGFX_MAX_DEVICES][32]; int sticks; int used; struct mutex sem; } *tgfx_base[TGFX_MAX_PORTS]; /* * tgfx_timer() reads and analyzes TurboGraFX joystick data. */ static void tgfx_timer(unsigned long private) { struct tgfx *tgfx = (void *) private; struct input_dev *dev; int data1, data2, i; for (i = 0; i < 7; i++) if (tgfx->sticks & (1 << i)) { dev = tgfx->dev[i]; parport_write_data(tgfx->pd->port, ~(1 << i)); data1 = parport_read_status(tgfx->pd->port) ^ 0x7f; data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */ input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT)); input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP )); input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER)); input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB )); input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 )); input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP )); input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 )); input_sync(dev); } mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); } static int tgfx_open(struct input_dev *dev) { struct tgfx *tgfx = input_get_drvdata(dev); int err; err = mutex_lock_interruptible(&tgfx->sem); if (err) return err; if (!tgfx->used++) { parport_claim(tgfx->pd); parport_write_control(tgfx->pd->port, 0x04); mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME); } mutex_unlock(&tgfx->sem); return 0; } static void tgfx_close(struct input_dev *dev) { struct tgfx *tgfx = input_get_drvdata(dev); mutex_lock(&tgfx->sem); if (!--tgfx->used) { del_timer_sync(&tgfx->timer); parport_write_control(tgfx->pd->port, 0x00); parport_release(tgfx->pd); } mutex_unlock(&tgfx->sem); } /* * tgfx_probe() probes for tg gamepads. */ static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs) { struct tgfx *tgfx; struct input_dev *input_dev; struct parport *pp; struct pardevice *pd; int i, j; int err; pp = parport_find_number(parport); if (!pp) { printk(KERN_ERR "turbografx.c: no such parport\n"); err = -EINVAL; goto err_out; } pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL); if (!pd) { printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n"); err = -EBUSY; goto err_put_pp; } tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL); if (!tgfx) { printk(KERN_ERR "turbografx.c: Not enough memory\n"); err = -ENOMEM; goto err_unreg_pardev; } mutex_init(&tgfx->sem); tgfx->pd = pd; init_timer(&tgfx->timer); tgfx->timer.data = (long) tgfx; tgfx->timer.function = tgfx_timer; for (i = 0; i < n_devs; i++) { if (n_buttons[i] < 1) continue; if (n_buttons[i] > 6) { printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]); err = -EINVAL; goto err_unreg_devs; } tgfx->dev[i] = input_dev = input_allocate_device(); if (!input_dev) { printk(KERN_ERR "turbografx.c: Not enough memory for input device\n"); err = -ENOMEM; goto err_unreg_devs; } tgfx->sticks |= (1 << i); snprintf(tgfx->name[i], sizeof(tgfx->name[i]), "TurboGraFX %d-button Multisystem joystick", n_buttons[i]); snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]), "%s/input%d", tgfx->pd->port->name, i); input_dev->name = tgfx->name[i]; input_dev->phys = tgfx->phys[i]; input_dev->id.bustype = BUS_PARPORT; input_dev->id.vendor = 0x0003; input_dev->id.product = n_buttons[i]; input_dev->id.version = 0x0100; input_set_drvdata(input_dev, tgfx); input_dev->open = tgfx_open; input_dev->close = tgfx_close; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0); input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0); for (j = 0; j < n_buttons[i]; j++) set_bit(tgfx_buttons[j], input_dev->keybit); err = input_register_device(tgfx->dev[i]); if (err) goto err_free_dev; } if (!tgfx->sticks) { printk(KERN_ERR "turbografx.c: No valid devices specified\n"); err = -EINVAL; goto err_free_tgfx; } return tgfx; err_free_dev: input_free_device(tgfx->dev[i]); err_unreg_devs: while (--i >= 0) if (tgfx->dev[i]) input_unregister_device(tgfx->dev[i]); err_free_tgfx: kfree(tgfx); err_unreg_pardev: parport_unregister_device(pd); err_put_pp: parport_put_port(pp); err_out: return ERR_PTR(err); } static void tgfx_remove(struct tgfx *tgfx) { int i; for (i = 0; i < TGFX_MAX_DEVICES; i++) if (tgfx->dev[i]) input_unregister_device(tgfx->dev[i]); parport_unregister_device(tgfx->pd); kfree(tgfx); } static int __init tgfx_init(void) { int i; int have_dev = 0; int err = 0; for (i = 0; i < TGFX_MAX_PORTS; i++) { if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0) continue; if (tgfx_cfg[i].nargs < 2) { printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n"); err = -EINVAL; break; } tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0], tgfx_cfg[i].args + 1, tgfx_cfg[i].nargs - 1); if (IS_ERR(tgfx_base[i])) { err = PTR_ERR(tgfx_base[i]); break; } have_dev = 1; } if (err) { while (--i >= 0) if (tgfx_base[i]) tgfx_remove(tgfx_base[i]); return err; } return have_dev ? 0 : -ENODEV; } static void __exit tgfx_exit(void) { int i; for (i = 0; i < TGFX_MAX_PORTS; i++) if (tgfx_base[i]) tgfx_remove(tgfx_base[i]); } module_init(tgfx_init); module_exit(tgfx_exit);