310 lines
7.3 KiB
C
310 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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#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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