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

• Lines: 555
• Date: Thu Jun 22 06:59:58 2000
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/adi.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/adi.c linux/drivers/char/joystick/adi.c
@@ -0,0 +1,554 @@
+/*
+ * $Id: adi.c,v 1.12 2000/06/03 20:18:52 vojtech Exp $
+ *
+ *  Copyright (c) 1998-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * Logitech ADI joystick family 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/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/input.h>
+#include <linux/gameport.h>
+#include <linux/init.h>
+
+/*
+ * Times, array sizes, flags, ids.
+ */
+
+#define ADI_MAX_START		200	/* Trigger to packet timeout [200us] */
+#define ADI_MAX_STROBE		40	/* Single bit timeout [40us] */
+#define ADI_REFRESH_TIME	HZ/50	/* How often to poll the joystick [20 ms] */
+#define ADI_INIT_DELAY		10	/* Delay after init packet [10ms] */
+#define ADI_DATA_DELAY		4	/* Delay after data packet [4ms] */
+
+#define ADI_MAX_LENGTH		256
+#define ADI_MIN_LENGTH		8
+#define ADI_MIN_LEN_LENGTH	10
+#define ADI_MIN_ID_LENGTH	66
+#define ADI_MAX_NAME_LENGTH	48
+#define ADI_MAX_CNAME_LENGTH	16
+
+#define ADI_FLAG_HAT		0x04
+#define ADI_FLAG_10BIT		0x08
+
+#define ADI_ID_TPD		0x01
+#define ADI_ID_WGP		0x06
+#define ADI_ID_WGPE		0x08
+#define ADI_ID_MAX		0x0a
+
+/*
+ * Names, buttons, axes ...
+ */
+
+static char *adi_names[] = {	"WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
+				"WingMan Interceptor", "WingMan Formula", "WingMan GamePad", 
+				"WingMan Extreme Digital 3D", "WingMan GamePad Extreme", 
+				"WingMan GamePad USB", "Unknown Device %#x" };
+
+static char adi_wmgpe_abs[] =	{ ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
+static char adi_wmi_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
+static char adi_wmed3d_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
+static char adi_cm2_abs[] =	{ ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
+static char adi_wmf_abs[] =	{ ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
+
+static short adi_wmgpe_key[] =	{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,  BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
+static short adi_wmi_key[] = 	{ BTN_TRIGGER,  BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
+static short adi_wmed3d_key[] =	{ BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
+static short adi_cm2_key[] =	{ BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
+
+static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
+			   adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
+
+static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
+			    adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
+
+/*
+ * Hat to axis conversion arrays.
+ */
+
+static struct {
+	int x;
+	int y;
+} adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
+
+/*
+ * Per-port information.
+ */
+
+struct adi {
+	struct input_dev dev;
+	int length;
+	int ret;
+	int idx;
+	unsigned char id;
+	char buttons;
+	char axes10;
+	char axes8;
+	signed char pad;
+	char hats;
+	char *abs;
+	short *key;
+	char name[ADI_MAX_NAME_LENGTH];
+	char cname[ADI_MAX_CNAME_LENGTH];
+	unsigned char data[ADI_MAX_LENGTH];
+};
+
+struct adi_port {
+	struct gameport *gameport;
+	struct timer_list timer;
+	struct adi adi[2];
+	int bad;
+	int reads;
+	int used;
+};
+
+/*
+ * adi_read_packet() reads a Logitech ADI packet.
+ */
+
+static void adi_read_packet(struct adi_port *port)
+{
+	struct adi *adi = port->adi;
+	struct gameport *gameport = port->gameport;
+	unsigned char u, v, w, x, z;
+	int t[2], s[2], i;
+	unsigned long flags;
+
+	for (i = 0; i < 2; i++) {
+		adi[i].ret = -1;
+		t[i] = gameport_time(gameport, ADI_MAX_START);
+		s[i] = 0;
+	}
+
+	__save_flags(flags);
+	__cli();
+
+	gameport_trigger(gameport);
+	v = z = gameport_read(gameport);
+
+	do {
+		u = v;
+		w = u ^ (v = x = gameport_read(gameport));
+		for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
+			t[i]--;
+			if ((w & 0x30) && s[i]) {
+				if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
+					adi[i].data[++adi[i].ret] = w;
+					t[i] = gameport_time(gameport, ADI_MAX_STROBE);
+				} else t[i] = 0;
+			} else if (!(x & 0x30)) s[i] = 1;
+		}
+	} while (t[0] > 0 || t[1] > 0);
+
+	__restore_flags(flags);
+
+	return;
+}
+
+/*
+ * adi_move_bits() detects a possible 2-stream mode, and moves
+ * the bits accordingly. 
+ */
+
+static void adi_move_bits(struct adi_port *port, int length)
+{
+	int i;
+	struct adi *adi = port->adi;
+
+ 	adi[0].idx = adi[1].idx = 0;
+
+	if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
+	if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
+
+	for (i = 1; i <= adi[1].ret; i++)
+		adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
+
+	adi[0].ret += adi[1].ret;
+	adi[1].ret = -1;
+}
+
+/*
+ * adi_get_bits() gathers bits from the data packet.
+ */
+
+static inline int adi_get_bits(struct adi *adi, int count)
+{
+	int bits = 0;
+	int i;
+	if ((adi->idx += count) > adi->ret) return 0;
+	for (i = 0; i < count; i++)
+		bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i; 
+	return bits;
+}
+
+/*
+ * adi_decode() decodes Logitech joystick data into input events.
+ */
+
+static int adi_decode(struct adi *adi)
+{
+	struct input_dev *dev = &adi->dev;
+	char *abs = adi->abs;
+	short *key = adi->key;
+	int i, t;
+
+	if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
+		return -1;	
+
+	for (i = 0; i < adi->axes10; i++) 
+		input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
+
+	for (i = 0; i < adi->axes8; i++) 
+		input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
+
+	for (i = 0; i < adi->buttons && i < 63; i++) {
+		if (i == adi->pad) {
+			t = adi_get_bits(adi, 4);
+			input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t       & 1));
+			input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
+		}
+		input_report_key(dev, *key++, adi_get_bits(adi, 1));
+	}
+
+	for (i = 0; i < adi->hats; i++) {
+		if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
+		input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
+		input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
+	}
+
+	for (i = 63; i < adi->buttons; i++)
+		input_report_key(dev, *key++, adi_get_bits(adi, 1));
+
+	return 0;
+}
+
+/*
+ * adi_read() reads the data packet and decodes it.
+ */
+
+static int adi_read(struct adi_port *port)
+{
+	int i;
+	int result = 0;
+
+	adi_read_packet(port);
+	adi_move_bits(port, port->adi[0].length);
+
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length)
+			 result |= adi_decode(port->adi + i);
+
+	return result;
+}
+
+/*
+ * adi_timer() repeatedly polls the Logitech joysticks.
+ */
+
+static void adi_timer(unsigned long data)
+{
+	struct adi_port *port = (void *) data;
+	port->bad -= adi_read(port);
+	port->reads++;
+	mod_timer(&port->timer, jiffies + ADI_REFRESH_TIME);
+}
+
+/*
+ * adi_open() is a callback from the input open routine.
+ */
+
+static int adi_open(struct input_dev *dev)
+{
+	struct adi_port *port = dev->private;
+	if (!port->used++)
+		mod_timer(&port->timer, jiffies + ADI_REFRESH_TIME);	
+	return 0;
+}
+
+/*
+ * adi_close() is a callback from the input close routine.
+ */
+
+static void adi_close(struct input_dev *dev)
+{
+	struct adi_port *port = dev->private;
+	if (!--port->used)
+		del_timer(&port->timer);
+}
+
+/*
+ * adi_init_digital() sends a trigger & delay sequence
+ * to reset and initialize a Logitech joystick into digital mode.
+ */
+
+static void adi_init_digital(struct gameport *gameport)
+{
+	int seq[] = { 3, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
+	int i;
+
+	for (i = 0; seq[i]; i++) {
+		gameport_trigger(gameport);
+		if (seq[i] > 0) wait_ms(seq[i]);
+		if (seq[i] < 0) mdelay(-seq[i]);
+	}
+}
+
+static void adi_id_decode(struct adi *adi, struct adi_port *port)
+{
+	int i, t;
+
+	if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
+		return;
+
+	if (adi->ret < (t = adi_get_bits(adi, 10))) {
+		printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret); 
+		return;
+	}
+
+	adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
+
+	if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
+
+	adi->length = adi_get_bits(adi, 10);
+
+	if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
+		printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
+		adi->length = 0;
+		return;
+	}
+
+	adi->axes8 = adi_get_bits(adi, 4);
+	adi->buttons = adi_get_bits(adi, 6);
+
+	if (adi_get_bits(adi, 6) != 8 && adi->hats) {
+		printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
+		adi->length = 0;
+		return;
+	}
+
+	adi->buttons += adi_get_bits(adi, 6);
+	adi->hats += adi_get_bits(adi, 4);
+
+	i = adi_get_bits(adi, 4);
+
+	if (t & ADI_FLAG_10BIT) {
+		adi->axes10 = adi->axes8 - i;
+		adi->axes8 = i;
+	}
+
+	t = adi_get_bits(adi, 4);
+
+	for (i = 0; i < t; i++)
+		adi->cname[i] = adi_get_bits(adi, 8);
+	adi->cname[i] = 0;
+
+	if (adi->length != (t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4)) {
+		printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
+		adi->length = 0;
+		return;
+	}
+
+	switch (adi->id) {
+		case ADI_ID_TPD:
+			adi->pad = 4;
+			adi->buttons -= 4;
+			break;
+		case ADI_ID_WGP:
+			adi->pad = 0;
+			adi->buttons -= 4;
+			break;
+		default:
+			adi->pad = -1;
+			break;
+	}
+}
+
+static void adi_init_input(struct adi *adi, struct adi_port *port)
+{
+	int i, t;
+	char buf[ADI_MAX_NAME_LENGTH];
+
+	if (!adi->length) return;
+
+	t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
+
+	sprintf(buf, adi_names[t], adi->id);
+	sprintf(adi->name, "Logitech %s", buf);
+
+	adi->abs = adi_abs[t];
+	adi->key = adi_key[t];
+
+	adi->dev.open = adi_open;
+	adi->dev.close = adi_close;
+
+	adi->dev.name = adi->name;
+	adi->dev.idbus = BUS_GAMEPORT;
+	adi->dev.idvendor = GAMEPORT_ID_VENDOR_LOGITECH;
+	adi->dev.idproduct = adi->id;
+	adi->dev.idversion = 0x0100;
+
+	adi->dev.private = port;
+	adi->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+
+	for (i = 0; i < adi->axes10 + adi->axes8 + adi->hats * 2; i++)
+		set_bit(adi->abs[i], &adi->dev.absbit);
+
+	for (i = 0; i < adi->buttons; i++)
+		set_bit(adi->key[i], &adi->dev.keybit);
+}
+
+static void adi_init_center(struct adi *adi)
+{
+	int i, t, x;
+
+	if (!adi->length) return;
+
+	for (i = 0; i < adi->axes10 + adi->axes8 + adi->hats * 2; i++) {
+
+		t = adi->abs[i];
+		x = adi->dev.abs[t];
+
+		if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE) {
+			if (i < adi->axes10) x = 512; else x = 128;
+		}
+
+		if (i < adi->axes10) {
+			adi->dev.absmax[t] = x * 2 - 64;
+			adi->dev.absmin[t] = 64;
+			adi->dev.absfuzz[t] = 2;
+			adi->dev.absflat[t] = 16;
+			continue;
+		}
+
+		if (i < adi->axes10 + adi->axes8) {
+			adi->dev.absmax[t] = x * 2 - 48;
+			adi->dev.absmin[t] = 48;
+			adi->dev.absfuzz[t] = 1;
+			adi->dev.absflat[t] = 16;
+			continue;
+		}
+
+		adi->dev.absmax[t] = 1;
+		adi->dev.absmin[t] = -1;
+	}
+}
+
+/*
+ * adi_connect() probes for Logitech ADI joysticks.
+ */
+
+static void adi_connect(struct gameport *gameport, struct gameport_dev *dev)
+{
+	struct adi_port *port;
+	int i;
+
+	if (!(port = kmalloc(sizeof(struct adi_port), GFP_KERNEL)))
+		return;
+	memset(port, 0, sizeof(struct adi_port));
+
+	gameport->private = port;
+
+	port->gameport = gameport;
+	init_timer(&port->timer);
+	port->timer.data = (long) port;
+	port->timer.function = adi_timer;
+
+	if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW)) {
+		kfree(port);
+		return;
+	}
+
+	adi_init_digital(gameport);
+	adi_read_packet(port);
+	
+	if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
+		adi_move_bits(port, adi_get_bits(port->adi, 10));
+
+	for (i = 0; i < 2; i++) {
+		adi_id_decode(port->adi + i, port);
+		adi_init_input(port->adi + i, port);
+	}
+
+	if (!port->adi[0].length && !port->adi[1].length) {
+		gameport_close(gameport);
+		kfree(port);
+		return;
+	}
+
+	wait_ms(ADI_INIT_DELAY);
+	if (adi_read(port)) {
+		wait_ms(ADI_DATA_DELAY);
+		adi_read(port);
+	}
+
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length > 0) {
+			adi_init_center(port->adi + i);
+			input_register_device(&port->adi[i].dev);
+			printk(KERN_INFO "input%d: %s [%s] on gameport%d.%d\n",
+				port->adi[i].dev.number, port->adi[i].name, port->adi[i].cname, gameport->number, i);
+		}
+}
+
+static void adi_disconnect(struct gameport *gameport)
+{
+	int i;
+
+	struct adi_port *port = gameport->private;
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length > 0)
+			input_unregister_device(&port->adi[i].dev);
+	gameport_close(gameport);
+	kfree(port);
+}
+
+/*
+ * The gameport device structure.
+ */
+
+static struct gameport_dev adi_dev = {
+	connect:	adi_connect,
+	disconnect:	adi_disconnect,
+};
+
+int __init adi_init(void)
+{
+	gameport_register_device(&adi_dev);
+	return 0;
+}
+
+void __exit adi_exit(void)
+{
+	gameport_unregister_device(&adi_dev);
+}
+
+module_init(adi_init);
+module_exit(adi_exit);