patch-2.4.0-test2 linux/drivers/char/joystick/grip.c

• Lines: 424
• Date: Wed Jun 21 08:22:21 2000
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/grip.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/grip.c linux/drivers/char/joystick/grip.c
@@ -0,0 +1,423 @@
+/*
+ * $Id: grip.c,v 1.14 2000/06/06 21:13:36 vojtech Exp $
+ *
+ *  Copyright (c) 1998-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * Gravis/Kensington GrIP protocol joystick and gamepad 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@suse.cz>, or by paper mail:
+ * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/malloc.h>
+#include <linux/gameport.h>
+#include <linux/input.h>
+
+#define GRIP_MODE_GPP		1
+#define GRIP_MODE_BD		2
+#define GRIP_MODE_XT		3
+#define GRIP_MODE_DC		4
+
+#define GRIP_LENGTH_GPP		24
+#define GRIP_STROBE_GPP		200	/* 200 us */
+#define GRIP_LENGTH_XT		4
+#define GRIP_STROBE_XT		64	/* 64 us */
+#define GRIP_MAX_CHUNKS_XT	10	
+#define GRIP_MAX_BITS_XT	30	
+
+#define GRIP_REFRESH_TIME	HZ/50	/* 20 ms */
+
+struct grip {
+	struct gameport *gameport;
+	struct timer_list timer;
+	struct input_dev dev[2];
+	unsigned char mode[2];
+	int used;
+	int reads;
+	int bads;
+};
+
+static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 };
+static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
+static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 };
+static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
+
+static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
+static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
+static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
+static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
+
+static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
+				"Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
+static int *grip_abs[] = { 0, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
+static int *grip_btn[] = { 0, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
+static char grip_anx[] = { 0, 0, 3, 5, 5 };
+static char grip_cen[] = { 0, 0, 2, 2, 4 };
+
+/*
+ * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
+ */
+
+static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
+{
+	unsigned long flags;
+	unsigned char u, v;
+	unsigned int t;
+	int i;
+
+	int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
+
+	data[0] = 0;
+	t = strobe;
+	i = 0;
+
+	__save_flags(flags);
+	__cli();
+
+	v = gameport_read(gameport) >> shift;
+
+	do {
+		t--;
+		u = v; v = (gameport_read(gameport) >> shift) & 3;
+		if (~v & u & 1) {
+			data[0] |= (v >> 1) << i++;
+			t = strobe;
+		}
+	} while (i < GRIP_LENGTH_GPP && t > 0);
+
+	__restore_flags(flags);
+
+	if (i < GRIP_LENGTH_GPP) return -1;
+
+	for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
+		data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
+
+	return -(i == GRIP_LENGTH_GPP);
+}
+
+/*
+ * grip_xt_read_packet() reads a Gravis Xterminator packet.
+ */
+
+static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
+{
+	unsigned int i, j, buf, crc;
+	unsigned char u, v, w;
+	unsigned long flags;
+	unsigned int t;
+	char status;
+
+	int strobe = gameport_time(gameport, GRIP_STROBE_XT);
+
+	data[0] = data[1] = data[2] = data[3] = 0;
+	status = buf = i = j = 0;
+	t = strobe;
+
+	__save_flags(flags);
+	__cli();
+
+	v = w = (gameport_read(gameport) >> shift) & 3;
+
+	do {
+		t--;
+		u = (gameport_read(gameport) >> shift) & 3;
+
+		if (u ^ v) {
+
+			if ((u ^ v) & 1) {
+				buf = (buf << 1) | (u >> 1);
+				t = strobe;
+				i++;
+			} else 
+
+			if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
+				if (i == 20) {
+					crc = buf ^ (buf >> 7) ^ (buf >> 14);
+					if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
+						data[buf >> 18] = buf >> 4;
+						status |= 1 << (buf >> 18);
+					}
+					j++;
+				}
+				t = strobe;
+				buf = 0;
+				i = 0;
+			}
+			w = v;
+			v = u;
+		}
+
+	} while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
+
+	__restore_flags(flags);
+
+	return -(status != 0xf);
+}
+
+/*
+ * grip_timer() repeatedly polls the joysticks and generates events.
+ */
+
+static void grip_timer(unsigned long private)
+{
+	struct grip *grip = (void*) private;
+	unsigned int data[GRIP_LENGTH_XT];
+	struct input_dev *dev;
+	int i, j;
+
+	for (i = 0; i < 2; i++) {
+
+		dev = grip->dev + i;
+		grip->reads++;
+
+		switch (grip->mode[i]) {
+
+			case GRIP_MODE_GPP:
+
+				if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
+					grip->bads++;
+					break;
+				}
+
+				input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
+				input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
+
+				for (j = 0; j < 12; j++)
+					if (grip_btn_gpp[j])
+						input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
+
+				break;
+
+			case GRIP_MODE_BD:
+
+				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
+					grip->bads++;
+					break;
+				}
+
+				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
+				input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
+				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
+
+				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
+				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
+
+				for (j = 0; j < 5; j++)
+					input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
+
+				break;
+
+			case GRIP_MODE_XT:
+
+				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
+					grip->bads++;
+					break;
+				}
+
+				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
+				input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
+				input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
+				input_report_abs(dev, ABS_GAS,	    (data[1] >> 8) & 0x3f);
+				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
+
+				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
+				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
+				input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
+				input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
+
+				for (j = 0; j < 11; j++)
+					input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
+				break;
+
+			case GRIP_MODE_DC:
+
+				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
+					grip->bads++;
+					break;
+				}
+
+				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
+				input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
+				input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
+				input_report_abs(dev, ABS_RY,	    (data[1] >> 8) & 0x3f);
+				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
+
+				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
+				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
+
+				for (j = 0; j < 9; j++)
+					input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
+				break;
+
+
+		}
+	}
+
+	mod_timer(&grip->timer, jiffies + GRIP_REFRESH_TIME);
+}
+
+static int grip_open(struct input_dev *dev)
+{
+	struct grip *grip = dev->private;
+	if (!grip->used++)
+		mod_timer(&grip->timer, jiffies + GRIP_REFRESH_TIME);
+	return 0;
+}
+
+static void grip_close(struct input_dev *dev)
+{
+	struct grip *grip = dev->private;
+	if (!--grip->used)
+		del_timer(&grip->timer);
+}
+
+static void grip_connect(struct gameport *gameport, struct gameport_dev *dev)
+{
+	struct grip *grip;
+	unsigned int data[GRIP_LENGTH_XT];
+	int i, j, t;
+
+	if (!(grip = kmalloc(sizeof(struct grip), GFP_KERNEL)))
+		return;
+	memset(grip, 0, sizeof(struct grip));
+
+	gameport->private = grip;
+
+	grip->gameport = gameport;
+	init_timer(&grip->timer);
+	grip->timer.data = (long) grip;
+	grip->timer.function = grip_timer;
+
+	 if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
+		goto fail1;
+
+	for (i = 0; i < 2; i++) {
+		if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
+			grip->mode[i] = GRIP_MODE_GPP;
+			continue;
+		}
+		if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
+			if (!(data[3] & 7)) {
+				grip->mode[i] = GRIP_MODE_BD;
+				continue;
+			}
+			if (!(data[2] & 0xf0)) {
+				grip->mode[i] = GRIP_MODE_XT;
+				continue;
+			}
+			grip->mode[i] = GRIP_MODE_DC;
+			continue;
+		}
+	}
+
+	if (!grip->mode[0] && !grip->mode[1])
+		goto fail2;
+
+	for (i = 0; i < 2; i++)
+		if (grip->mode[i]) {
+
+			grip->dev[i].private = grip;
+
+			grip->dev[i].open = grip_open;
+			grip->dev[i].close = grip_close;
+
+			grip->dev[i].name = grip_name[grip->mode[i]];
+			grip->dev[i].idbus = BUS_GAMEPORT;
+			grip->dev[i].idvendor = GAMEPORT_ID_VENDOR_GRAVIS;
+			grip->dev[i].idproduct = grip->mode[i];
+			grip->dev[i].idversion = 0x0100;
+
+			grip->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+
+			for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
+
+				set_bit(t, grip->dev[i].absbit);
+
+				if (j < grip_cen[grip->mode[i]]) {
+					grip->dev[i].absmin[t] = 14;
+					grip->dev[i].absmax[t] = 52;
+					grip->dev[i].absfuzz[t] = 1;
+					grip->dev[i].absflat[t] = 2;
+					continue;
+				}
+
+				if (j < grip_anx[grip->mode[i]]) {
+					grip->dev[i].absmin[t] = 3;
+					grip->dev[i].absmax[t] = 57;
+					grip->dev[i].absfuzz[t] = 1;
+					continue;
+				}
+
+				grip->dev[i].absmin[t] = -1;
+				grip->dev[i].absmax[t] = 1;
+			}
+
+			for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
+				if (t > 0)
+					set_bit(t, grip->dev[i].keybit);
+
+			input_register_device(grip->dev + i);
+
+			printk(KERN_INFO "input%d: %s on gameport%d.%d\n",
+				grip->dev[i].number, grip_name[grip->mode[i]], gameport->number, i);
+		}
+
+	return;
+fail2:	gameport_close(gameport);
+fail1:	kfree(grip);
+}
+
+static void grip_disconnect(struct gameport *gameport)
+{
+	int i;
+
+	struct grip *grip = gameport->private;
+	for (i = 0; i < 2; i++)
+		if (grip->mode[i])
+			input_unregister_device(grip->dev + i);
+	gameport_close(gameport);
+	kfree(grip);
+}
+
+static struct gameport_dev grip_dev = {
+	connect:	grip_connect,
+	disconnect:	grip_disconnect,
+};
+
+int __init grip_init(void)
+{
+	gameport_register_device(&grip_dev);
+	return 0;
+}
+
+void __exit grip_exit(void)
+{
+	gameport_unregister_device(&grip_dev);
+}
+
+module_init(grip_init);
+module_exit(grip_exit);