--- /dev/null
+/*
+ * 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;
+ }
+
+ parport_put_port(pp);
+ 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);
Code Review / kvmfornfv.git / blobdiff