gamecon.c

h内核

				axes[0] = axes[1] = 0;

				for (j = 0; j < 8; j++) {
					if (data[23 - j] & s) axes[0] |= 1 << j;
					if (data[31 - j] & s) axes[1] |= 1 << j;
				}

				input_report_abs(dev + i, ABS_X,  axes[0]);
				input_report_abs(dev + i, ABS_Y, -axes[1]);

				input_report_abs(dev + i, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
				input_report_abs(dev + i, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));

				for (j = 0; j < 10; j++)
					input_report_key(dev + i, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);

				input_sync(dev + i);
			}
		}
	}

/*
 * NES and SNES pads
 */

	if (gc->pads[GC_NES] || gc->pads[GC_SNES]) {

		gc_nes_read_packet(gc, gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH, data);

		for (i = 0; i < 5; i++) {

			s = gc_status_bit[i];

			if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
				input_report_abs(dev + i, ABS_X, !(s & data[6]) - !(s & data[7]));
				input_report_abs(dev + i, ABS_Y, !(s & data[4]) - !(s & data[5]));
			}

			if (s & gc->pads[GC_NES])
				for (j = 0; j < 4; j++)
					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);

			if (s & gc->pads[GC_SNES])
				for (j = 0; j < 8; j++)
					input_report_key(dev + i, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);

			input_sync(dev + i);
		}
	}

/*
 * Multi and Multi2 joysticks
 */

	if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2]) {

		gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);

		for (i = 0; i < 5; i++) {

			s = gc_status_bit[i];

			if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
				input_report_abs(dev + i, ABS_X,  !(s & data[2]) - !(s & data[3]));
				input_report_abs(dev + i, ABS_Y,  !(s & data[0]) - !(s & data[1]));
				input_report_key(dev + i, BTN_TRIGGER, s & data[4]);
			}

			if (s & gc->pads[GC_MULTI2])
				input_report_key(dev + i, BTN_THUMB, s & data[5]);

			input_sync(dev + i);
		}
	}

/*
 * PSX controllers
 */

	if (gc->pads[GC_PSX] || gc->pads[GC_DDR]) {

		gc_psx_read_packet(gc, data_psx, data);

		for (i = 0; i < 5; i++) {
	 		switch (data[i]) {

				case GC_PSX_RUMBLE:

					input_report_key(dev + i, BTN_THUMBL, ~data_psx[i][0] & 0x04);
					input_report_key(dev + i, BTN_THUMBR, ~data_psx[i][0] & 0x02);

				case GC_PSX_NEGCON:
				case GC_PSX_ANALOG:

					if(gc->pads[GC_DDR] & gc_status_bit[i]) {
						for(j = 0; j < 4; j++)
							input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
					} else {
						for (j = 0; j < 4; j++)
							input_report_abs(dev + i, gc_psx_abs[j+2], data_psx[i][j + 2]);

						input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
						input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);
					}

					for (j = 0; j < 8; j++)
						input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));

					input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
					input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);

					input_sync(dev + i);

					break;

				case GC_PSX_NORMAL:
					if(gc->pads[GC_DDR] & gc_status_bit[i]) {
						for(j = 0; j < 4; j++)
							input_report_key(dev + i, gc_psx_ddr_btn[j], ~data_psx[i][0] & (0x10 << j));
					} else {
						input_report_abs(dev + i, ABS_X, 128 + !(data_psx[i][0] & 0x20) * 127 - !(data_psx[i][0] & 0x80) * 128);
						input_report_abs(dev + i, ABS_Y, 128 + !(data_psx[i][0] & 0x40) * 127 - !(data_psx[i][0] & 0x10) * 128);

						/* for some reason if the extra axes are left unset they drift */
						/* for (j = 0; j < 4; j++)
							input_report_abs(dev + i, gc_psx_abs[j+2], 128);
						 * This needs to be debugged properly,
						 * maybe fuzz processing needs to be done in input_sync()
						 *				 --vojtech
						 */
					}

					for (j = 0; j < 8; j++)
						input_report_key(dev + i, gc_psx_btn[j], ~data_psx[i][1] & (1 << j));

					input_report_key(dev + i, BTN_START,  ~data_psx[i][0] & 0x08);
					input_report_key(dev + i, BTN_SELECT, ~data_psx[i][0] & 0x01);

					input_sync(dev + i);

					break;

				case 0: /* not a pad, ignore */
					break;
			}
		}
	}

	mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
}

static int gc_open(struct input_dev *dev)
{
	struct gc *gc = dev->private;
	if (!gc->used++) {
		parport_claim(gc->pd);
		parport_write_control(gc->pd->port, 0x04);
		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
	}
	return 0;
}

static void gc_close(struct input_dev *dev)
{
	struct gc *gc = dev->private;
	if (!--gc->used) {
		del_timer(&gc->timer);
		parport_write_control(gc->pd->port, 0x00);
		parport_release(gc->pd);
	}
}

static struct gc __init *gc_probe(int *config, int nargs)
{
	struct gc *gc;
	struct parport *pp;
	int i, j;

	if (config[0] < 0)
		return NULL;

	if (nargs < 2) {
		printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
		return NULL;
	}

	pp = parport_find_number(config[0]);

	if (!pp) {
		printk(KERN_ERR "gamecon.c: no such parport\n");
		return NULL;
	}

	if (!(gc = kmalloc(sizeof(struct gc), GFP_KERNEL))) {
		parport_put_port(pp);
		return NULL;
	}
	memset(gc, 0, sizeof(struct gc));

	gc->pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);

	parport_put_port(pp);

	if (!gc->pd) {
		printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
		kfree(gc);
		return NULL;
	}

	parport_claim(gc->pd);

	init_timer(&gc->timer);
	gc->timer.data = (long) gc;
	gc->timer.function = gc_timer;

	for (i = 0; i < nargs - 1; i++) {

		if (!config[i + 1])
			continue;

		if (config[i + 1] < 1 || config[i + 1] > GC_MAX) {
			printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", config[i + 1]);
			continue;
		}

                gc->dev[i].private = gc;
                gc->dev[i].open = gc_open;
                gc->dev[i].close = gc_close;

                gc->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

		for (j = 0; j < 2; j++) {
			set_bit(ABS_X + j, gc->dev[i].absbit);
			gc->dev[i].absmin[ABS_X + j] = -1;
			gc->dev[i].absmax[ABS_X + j] =  1;
		}

		gc->pads[0] |= gc_status_bit[i];
		gc->pads[config[i + 1]] |= gc_status_bit[i];

		switch(config[i + 1]) {

			case GC_N64:
				for (j = 0; j < 10; j++)
					set_bit(gc_n64_btn[j], gc->dev[i].keybit);

				for (j = 0; j < 2; j++) {
					set_bit(ABS_X + j, gc->dev[i].absbit);
					gc->dev[i].absmin[ABS_X + j] = -127;
					gc->dev[i].absmax[ABS_X + j] =  126;
					gc->dev[i].absflat[ABS_X + j] = 2;
					set_bit(ABS_HAT0X + j, gc->dev[i].absbit);
					gc->dev[i].absmin[ABS_HAT0X + j] = -1;
					gc->dev[i].absmax[ABS_HAT0X + j] =  1;
				}

				break;

			case GC_SNES:
				for (j = 4; j < 8; j++)
					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
			case GC_NES:
				for (j = 0; j < 4; j++)
					set_bit(gc_snes_btn[j], gc->dev[i].keybit);
				break;

			case GC_MULTI2:
				set_bit(BTN_THUMB, gc->dev[i].keybit);
			case GC_MULTI:
				set_bit(BTN_TRIGGER, gc->dev[i].keybit);
				break;

			case GC_PSX:
			case GC_DDR:
				if(config[i + 1] == GC_DDR) {
					for (j = 0; j < 4; j++)
						set_bit(gc_psx_ddr_btn[j], gc->dev[i].keybit);
				} else {
					for (j = 0; j < 6; j++) {
						set_bit(gc_psx_abs[j], gc->dev[i].absbit);
						gc->dev[i].absmin[gc_psx_abs[j]] = 4;
						gc->dev[i].absmax[gc_psx_abs[j]] = 252;
						gc->dev[i].absflat[gc_psx_abs[j]] = 2;
					}
				}

				for (j = 0; j < 12; j++)
					set_bit(gc_psx_btn[j], gc->dev[i].keybit);

				break;
		}

		sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);

                gc->dev[i].name = gc_names[config[i + 1]];
		gc->dev[i].phys = gc->phys[i];
                gc->dev[i].id.bustype = BUS_PARPORT;
                gc->dev[i].id.vendor = 0x0001;
                gc->dev[i].id.product = config[i + 1];
                gc->dev[i].id.version = 0x0100;
	}

	parport_release(gc->pd);

	if (!gc->pads[0]) {
		parport_unregister_device(gc->pd);
		kfree(gc);
		return NULL;
	}

	for (i = 0; i < 5; i++)
		if (gc->pads[0] & gc_status_bit[i]) {
			input_register_device(gc->dev + i);
			printk(KERN_INFO "input: %s on %s\n", gc->dev[i].name, gc->pd->port->name);
		}

	return gc;
}

int __init gc_init(void)
{
	gc_base[0] = gc_probe(gc, gc_nargs);
	gc_base[1] = gc_probe(gc_2, gc_nargs_2);
	gc_base[2] = gc_probe(gc_3, gc_nargs_3);

	if (gc_base[0] || gc_base[1] || gc_base[2])
		return 0;

	return -ENODEV;
}

void __exit gc_exit(void)
{
	int i, j;

	for (i = 0; i < 3; i++)
		if (gc_base[i]) {
			for (j = 0; j < 5; j++)
				if (gc_base[i]->pads[0] & gc_status_bit[j])
					input_unregister_device(gc_base[i]->dev + j);
			parport_unregister_device(gc_base[i]->pd);
		}
}

module_init(gc_init);
module_exit(gc_exit);