gamecon.c

来自「linux2.6.16版本」· C语言 代码 · 共 798 行 · 第 1/2 页

	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);	/* Select pad */
	udelay(gc_psx_delay);
	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);			/* Deselect, begin command */
	udelay(gc_psx_delay);

	local_irq_save(flags);

	gc_psx_command(gc, 0x01, data2);						/* Access pad */
	gc_psx_command(gc, 0x42, id);							/* Get device ids */
	gc_psx_command(gc, 0, data2);							/* Dump status */

	for (i =0; i < GC_MAX_DEVICES; i++)								/* Find the longest pad */
		if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
			&& (GC_PSX_LEN(id[i]) > max_len)
			&& (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
			max_len = GC_PSX_LEN(id[i]);

	for (i = 0; i < max_len; i++) {						/* Read in all the data */
		gc_psx_command(gc, 0, data2);
		for (j = 0; j < GC_MAX_DEVICES; j++)
			data[j][i] = data2[j];
	}

	local_irq_restore(flags);

	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);

	for(i = 0; i < GC_MAX_DEVICES; i++)								/* Set id's to the real value */
		id[i] = GC_PSX_ID(id[i]);
}

static void gc_psx_process_packet(struct gc *gc)
{
	unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
	unsigned char id[GC_MAX_DEVICES];
	struct input_dev *dev;
	int i, j;

	gc_psx_read_packet(gc, data, id);

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

		dev = gc->dev[i];
		if (!dev)
			continue;

		switch (id[i]) {

			case GC_PSX_RUMBLE:

				input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
				input_report_key(dev, BTN_THUMBR, ~data[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, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
				} else {
					for (j = 0; j < 4; j++)
						input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);

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

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

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

				input_sync(dev);

				break;

			case GC_PSX_NORMAL:
				if (gc->pads[GC_DDR] & gc_status_bit[i]) {
					for(j = 0; j < 4; j++)
						input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
				} else {
					input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
					input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[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, 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, gc_psx_btn[j], ~data[i][1] & (1 << j));

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

				input_sync(dev);

				break;

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

/*
 * gc_timer() initiates reads of console pads data.
 */

static void gc_timer(unsigned long private)
{
	struct gc *gc = (void *) private;

/*
 * N64 pads - must be read first, any read confuses them for 200 us
 */

	if (gc->pads[GC_N64])
		gc_n64_process_packet(gc);

/*
 * NES and SNES pads
 */

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

/*
 * Multi and Multi2 joysticks
 */

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

/*
 * PSX controllers
 */

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

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

static int gc_open(struct input_dev *dev)
{
	struct gc *gc = dev->private;
	int err;

	err = down_interruptible(&gc->sem);
	if (err)
		return err;

	if (!gc->used++) {
		parport_claim(gc->pd);
		parport_write_control(gc->pd->port, 0x04);
		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
	}

	up(&gc->sem);
	return 0;
}

static void gc_close(struct input_dev *dev)
{
	struct gc *gc = dev->private;

	down(&gc->sem);
	if (!--gc->used) {
		del_timer_sync(&gc->timer);
		parport_write_control(gc->pd->port, 0x00);
		parport_release(gc->pd);
	}
	up(&gc->sem);
}

static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
{
	struct input_dev *input_dev;
	int i;

	if (!pad_type)
		return 0;

	if (pad_type < 1 || pad_type > GC_MAX) {
		printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
		return -EINVAL;
	}

	gc->dev[idx] = input_dev = input_allocate_device();
	if (!input_dev) {
		printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
		return -ENOMEM;
	}

	input_dev->name = gc_names[pad_type];
	input_dev->phys = gc->phys[idx];
	input_dev->id.bustype = BUS_PARPORT;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = pad_type;
	input_dev->id.version = 0x0100;
	input_dev->private = gc;

	input_dev->open = gc_open;
	input_dev->close = gc_close;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

	for (i = 0; i < 2; i++)
		input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);

	gc->pads[0] |= gc_status_bit[idx];
	gc->pads[pad_type] |= gc_status_bit[idx];

	switch (pad_type) {

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

			for (i = 0; i < 2; i++) {
				input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
				input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
			}

			break;

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

		case GC_MULTI2:
			set_bit(BTN_THUMB, input_dev->keybit);
		case GC_MULTI:
			set_bit(BTN_TRIGGER, input_dev->keybit);
			break;

		case GC_PSX:
			for (i = 0; i < 6; i++)
				input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
			for (i = 0; i < 12; i++)
				set_bit(gc_psx_btn[i], input_dev->keybit);

			break;

		case GC_DDR:
			for (i = 0; i < 4; i++)
				set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
			for (i = 0; i < 12; i++)
				set_bit(gc_psx_btn[i], input_dev->keybit);

			break;
	}

	return 0;
}

static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
{
	struct gc *gc;
	struct parport *pp;
	struct pardevice *pd;
	int i;
	int err;

	pp = parport_find_number(parport);
	if (!pp) {
		printk(KERN_ERR "gamecon.c: no such parport\n");
		err = -EINVAL;
		goto err_out;
	}

	pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	if (!pd) {
		printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
		err = -EBUSY;
		goto err_put_pp;
	}

	gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
	if (!gc) {
		printk(KERN_ERR "gamecon.c: Not enough memory\n");
		err = -ENOMEM;
		goto err_unreg_pardev;
	}

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

	for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
		if (!pads[i])
			continue;

		sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
		err = gc_setup_pad(gc, i, pads[i]);
		if (err)
			goto err_unreg_devs;

		err = input_register_device(gc->dev[i]);
		if (err)
			goto err_free_dev;
	}

	if (!gc->pads[0]) {
		printk(KERN_ERR "gamecon.c: No valid devices specified\n");
		err = -EINVAL;
		goto err_free_gc;
	}

	parport_put_port(pp);
	return gc;

 err_free_dev:
	input_free_device(gc->dev[i]);
 err_unreg_devs:
	while (--i >= 0)
		if (gc->dev[i])
			input_unregister_device(gc->dev[i]);
 err_free_gc:
	kfree(gc);
 err_unreg_pardev:
	parport_unregister_device(pd);
 err_put_pp:
	parport_put_port(pp);
 err_out:
	return ERR_PTR(err);
}

static void gc_remove(struct gc *gc)
{
	int i;

	for (i = 0; i < GC_MAX_DEVICES; i++)
		if (gc->dev[i])
			input_unregister_device(gc->dev[i]);
	parport_unregister_device(gc->pd);
	kfree(gc);
}

static int __init gc_init(void)
{
	int i;
	int have_dev = 0;
	int err = 0;

	for (i = 0; i < GC_MAX_PORTS; i++) {
		if (gc[i].nargs == 0 || gc[i].args[0] < 0)
			continue;

		if (gc[i].nargs < 2) {
			printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
			err = -EINVAL;
			break;
		}

		gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
		if (IS_ERR(gc_base[i])) {
			err = PTR_ERR(gc_base[i]);
			break;
		}

		have_dev = 1;
	}

	if (err) {
		while (--i >= 0)
			if (gc_base[i])
				gc_remove(gc_base[i]);
		return err;
	}

	return have_dev ? 0 : -ENODEV;
}

static void __exit gc_exit(void)
{
	int i;

	for (i = 0; i < GC_MAX_PORTS; i++)
		if (gc_base[i])
			gc_remove(gc_base[i]);
}

module_init(gc_init);
module_exit(gc_exit);