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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
312 lines
7.3 KiB
C
312 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1998-2001 Vojtech Pavlik
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*
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* Based on the work of:
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* Steffen Schwenke
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*/
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/*
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* TurboGraFX parallel port interface driver for Linux.
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*/
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/*
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*/
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#include <linux/kernel.h>
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#include <linux/parport.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
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MODULE_LICENSE("GPL");
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#define TGFX_MAX_PORTS 3
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#define TGFX_MAX_DEVICES 7
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struct tgfx_config {
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int args[TGFX_MAX_DEVICES + 1];
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unsigned int nargs;
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};
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static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS];
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module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
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MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
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module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
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MODULE_PARM_DESC(map2, "Describes second set of devices");
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module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
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MODULE_PARM_DESC(map3, "Describes third set of devices");
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#define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
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#define TGFX_TRIGGER 0x08
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#define TGFX_UP 0x10
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#define TGFX_DOWN 0x20
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#define TGFX_LEFT 0x40
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#define TGFX_RIGHT 0x80
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#define TGFX_THUMB 0x02
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#define TGFX_THUMB2 0x04
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#define TGFX_TOP 0x01
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#define TGFX_TOP2 0x08
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static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
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static struct tgfx {
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struct pardevice *pd;
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struct timer_list timer;
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struct input_dev *dev[TGFX_MAX_DEVICES];
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char name[TGFX_MAX_DEVICES][64];
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char phys[TGFX_MAX_DEVICES][32];
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int sticks;
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int used;
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int parportno;
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struct mutex sem;
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} *tgfx_base[TGFX_MAX_PORTS];
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/*
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* tgfx_timer() reads and analyzes TurboGraFX joystick data.
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*/
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static void tgfx_timer(struct timer_list *t)
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{
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struct tgfx *tgfx = from_timer(tgfx, t, timer);
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struct input_dev *dev;
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int data1, data2, i;
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for (i = 0; i < 7; i++)
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if (tgfx->sticks & (1 << i)) {
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dev = tgfx->dev[i];
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parport_write_data(tgfx->pd->port, ~(1 << i));
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data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
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data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
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input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
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input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
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input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
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input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
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input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
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input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
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input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
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input_sync(dev);
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}
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mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
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}
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static int tgfx_open(struct input_dev *dev)
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{
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struct tgfx *tgfx = input_get_drvdata(dev);
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int err;
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err = mutex_lock_interruptible(&tgfx->sem);
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if (err)
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return err;
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if (!tgfx->used++) {
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parport_claim(tgfx->pd);
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parport_write_control(tgfx->pd->port, 0x04);
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mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
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}
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mutex_unlock(&tgfx->sem);
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return 0;
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}
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static void tgfx_close(struct input_dev *dev)
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{
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struct tgfx *tgfx = input_get_drvdata(dev);
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mutex_lock(&tgfx->sem);
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if (!--tgfx->used) {
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del_timer_sync(&tgfx->timer);
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parport_write_control(tgfx->pd->port, 0x00);
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parport_release(tgfx->pd);
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}
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mutex_unlock(&tgfx->sem);
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}
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/*
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* tgfx_probe() probes for tg gamepads.
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*/
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static void tgfx_attach(struct parport *pp)
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{
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struct tgfx *tgfx;
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struct input_dev *input_dev;
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struct pardevice *pd;
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int i, j, port_idx;
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int *n_buttons, n_devs;
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struct pardev_cb tgfx_parport_cb;
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for (port_idx = 0; port_idx < TGFX_MAX_PORTS; port_idx++) {
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if (tgfx_cfg[port_idx].nargs == 0 ||
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tgfx_cfg[port_idx].args[0] < 0)
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continue;
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if (tgfx_cfg[port_idx].args[0] == pp->number)
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break;
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}
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if (port_idx == TGFX_MAX_PORTS) {
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pr_debug("Not using parport%d.\n", pp->number);
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return;
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}
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n_buttons = tgfx_cfg[port_idx].args + 1;
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n_devs = tgfx_cfg[port_idx].nargs - 1;
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memset(&tgfx_parport_cb, 0, sizeof(tgfx_parport_cb));
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tgfx_parport_cb.flags = PARPORT_FLAG_EXCL;
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pd = parport_register_dev_model(pp, "turbografx", &tgfx_parport_cb,
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port_idx);
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if (!pd) {
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pr_err("parport busy already - lp.o loaded?\n");
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return;
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}
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tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
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if (!tgfx) {
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printk(KERN_ERR "turbografx.c: Not enough memory\n");
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goto err_unreg_pardev;
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}
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mutex_init(&tgfx->sem);
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tgfx->pd = pd;
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tgfx->parportno = pp->number;
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timer_setup(&tgfx->timer, tgfx_timer, 0);
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for (i = 0; i < n_devs; i++) {
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if (n_buttons[i] < 1)
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continue;
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if (n_buttons[i] > ARRAY_SIZE(tgfx_buttons)) {
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printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
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goto err_unreg_devs;
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}
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tgfx->dev[i] = input_dev = input_allocate_device();
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if (!input_dev) {
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printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
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goto err_unreg_devs;
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}
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tgfx->sticks |= (1 << i);
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snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
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"TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
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snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
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"%s/input%d", tgfx->pd->port->name, i);
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input_dev->name = tgfx->name[i];
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input_dev->phys = tgfx->phys[i];
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input_dev->id.bustype = BUS_PARPORT;
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input_dev->id.vendor = 0x0003;
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input_dev->id.product = n_buttons[i];
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input_dev->id.version = 0x0100;
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input_set_drvdata(input_dev, tgfx);
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input_dev->open = tgfx_open;
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input_dev->close = tgfx_close;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
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input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
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for (j = 0; j < n_buttons[i]; j++)
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set_bit(tgfx_buttons[j], input_dev->keybit);
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if (input_register_device(tgfx->dev[i]))
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goto err_free_dev;
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}
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if (!tgfx->sticks) {
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printk(KERN_ERR "turbografx.c: No valid devices specified\n");
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goto err_free_tgfx;
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}
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tgfx_base[port_idx] = tgfx;
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return;
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err_free_dev:
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input_free_device(tgfx->dev[i]);
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err_unreg_devs:
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while (--i >= 0)
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if (tgfx->dev[i])
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input_unregister_device(tgfx->dev[i]);
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err_free_tgfx:
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kfree(tgfx);
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err_unreg_pardev:
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parport_unregister_device(pd);
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}
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static void tgfx_detach(struct parport *port)
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{
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int i;
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struct tgfx *tgfx;
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for (i = 0; i < TGFX_MAX_PORTS; i++) {
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if (tgfx_base[i] && tgfx_base[i]->parportno == port->number)
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break;
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}
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if (i == TGFX_MAX_PORTS)
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return;
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tgfx = tgfx_base[i];
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tgfx_base[i] = NULL;
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for (i = 0; i < TGFX_MAX_DEVICES; i++)
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if (tgfx->dev[i])
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input_unregister_device(tgfx->dev[i]);
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parport_unregister_device(tgfx->pd);
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kfree(tgfx);
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}
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static struct parport_driver tgfx_parport_driver = {
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.name = "turbografx",
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.match_port = tgfx_attach,
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.detach = tgfx_detach,
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.devmodel = true,
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};
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static int __init tgfx_init(void)
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{
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int i;
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int have_dev = 0;
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for (i = 0; i < TGFX_MAX_PORTS; i++) {
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if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
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continue;
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if (tgfx_cfg[i].nargs < 2) {
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printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
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return -EINVAL;
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}
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have_dev = 1;
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}
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if (!have_dev)
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return -ENODEV;
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return parport_register_driver(&tgfx_parport_driver);
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}
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static void __exit tgfx_exit(void)
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{
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parport_unregister_driver(&tgfx_parport_driver);
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}
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module_init(tgfx_init);
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module_exit(tgfx_exit);
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