1 files changed, 247 insertions, 0 deletions

diff --git a/drivers/input/joystick/magellan.c b/drivers/input/joystick/magellan.c
new file mode 100644
index 000000000000..1ba503627242
--- /dev/null
+++ b/drivers/input/joystick/magellan.c
@@ -0,0 +1,247 @@
+/*
+ * $Id: magellan.c,v 1.16 2002/01/22 20:28:39 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ */
+
+/*
+ * Magellan and Space Mouse 6dof controller 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@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+#define DRIVER_DESC     "Magellan and SpaceMouse 6dof controller driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+/*
+ * Definitions & global arrays.
+ */
+
+#define MAGELLAN_MAX_LENGTH     32
+
+static int magellan_buttons[] = { BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
+static int magellan_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
+static char *magellan_name = "LogiCad3D Magellan / SpaceMouse";
+
+/*
+ * Per-Magellan data.
+ */
+
+struct magellan {
+        struct input_dev dev;
+        int idx;
+        unsigned char data[MAGELLAN_MAX_LENGTH];
+        char phys[32];
+};
+
+/*
+ * magellan_crunch_nibbles() verifies that the bytes sent from the Magellan
+ * have correct upper nibbles for the lower ones, if not, the packet will
+ * be thrown away. It also strips these upper halves to simplify further
+ * processing.
+ */
+
+static int magellan_crunch_nibbles(unsigned char *data, int count)
+{
+        static unsigned char nibbles[16] = "0AB3D56GH9:K<MN?";
+
+        do {
+                if (data[count] == nibbles[data[count] & 0xf])
+                        data[count] = data[count] & 0xf;
+                else
+                        return -1;
+        } while (--count);
+
+        return 0;
+}
+
+static void magellan_process_packet(struct magellan* magellan, struct pt_regs *regs)
+{
+        struct input_dev *dev = &magellan->dev;
+        unsigned char *data = magellan->data;
+        int i, t;
+
+        if (!magellan->idx) return;
+
+        input_regs(dev, regs);
+
+        switch (magellan->data[0]) {
+
+                case 'd':                               /* Axis data */
+                        if (magellan->idx != 25) return;
+                        if (magellan_crunch_nibbles(data, 24)) return;
+                        for (i = 0; i < 6; i++)
+                                input_report_abs(dev, magellan_axes[i],
+                                        (data[(i << 2) + 1] << 12 | data[(i << 2) + 2] << 8 |
+                                         data[(i << 2) + 3] <<  4 | data[(i << 2) + 4]) - 32768);
+                        break;
+
+                case 'k':                               /* Button data */
+                        if (magellan->idx != 4) return;
+                        if (magellan_crunch_nibbles(data, 3)) return;
+                        t = (data[1] << 1) | (data[2] << 5) | data[3];
+                        for (i = 0; i < 9; i++) input_report_key(dev, magellan_buttons[i], (t >> i) & 1);
+                        break;
+        }
+
+        input_sync(dev);
+}
+
+static irqreturn_t magellan_interrupt(struct serio *serio,
+                unsigned char data, unsigned int flags, struct pt_regs *regs)
+{
+        struct magellan* magellan = serio_get_drvdata(serio);
+
+        if (data == '\r') {
+                magellan_process_packet(magellan, regs);
+                magellan->idx = 0;
+        } else {
+                if (magellan->idx < MAGELLAN_MAX_LENGTH)
+                        magellan->data[magellan->idx++] = data;
+        }
+        return IRQ_HANDLED;
+}
+
+/*
+ * magellan_disconnect() is the opposite of magellan_connect()
+ */
+
+static void magellan_disconnect(struct serio *serio)
+{
+        struct magellan* magellan = serio_get_drvdata(serio);
+
+        input_unregister_device(&magellan->dev);
+        serio_close(serio);
+        serio_set_drvdata(serio, NULL);
+        kfree(magellan);
+}
+
+/*
+ * magellan_connect() is the routine that is called when someone adds a
+ * new serio device that supports Magellan protocol and registers it as
+ * an input device.
+ */
+
+static int magellan_connect(struct serio *serio, struct serio_driver *drv)
+{
+        struct magellan *magellan;
+        int i, t;
+        int err;
+
+        if (!(magellan = kmalloc(sizeof(struct magellan), GFP_KERNEL)))
+                return -ENOMEM;
+
+        memset(magellan, 0, sizeof(struct magellan));
+
+        magellan->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+
+        for (i = 0; i < 9; i++)
+                set_bit(magellan_buttons[i], magellan->dev.keybit);
+
+        for (i = 0; i < 6; i++) {
+                t = magellan_axes[i];
+                set_bit(t, magellan->dev.absbit);
+                magellan->dev.absmin[t] = -360;
+                magellan->dev.absmax[t] =  360;
+        }
+
+        sprintf(magellan->phys, "%s/input0", serio->phys);
+
+        init_input_dev(&magellan->dev);
+        magellan->dev.private = magellan;
+        magellan->dev.name = magellan_name;
+        magellan->dev.phys = magellan->phys;
+        magellan->dev.id.bustype = BUS_RS232;
+        magellan->dev.id.vendor = SERIO_MAGELLAN;
+        magellan->dev.id.product = 0x0001;
+        magellan->dev.id.version = 0x0100;
+        magellan->dev.dev = &serio->dev;
+
+        serio_set_drvdata(serio, magellan);
+
+        err = serio_open(serio, drv);
+        if (err) {
+                serio_set_drvdata(serio, NULL);
+                kfree(magellan);
+                return err;
+        }
+
+        input_register_device(&magellan->dev);
+
+        printk(KERN_INFO "input: %s on %s\n", magellan_name, serio->phys);
+
+        return 0;
+}
+
+/*
+ * The serio driver structure.
+ */
+
+static struct serio_device_id magellan_serio_ids[] = {
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MAGELLAN,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, magellan_serio_ids);
+
+static struct serio_driver magellan_drv = {
+        .driver         = {
+                .name   = "magellan",
+        },
+        .description    = DRIVER_DESC,
+        .id_table       = magellan_serio_ids,
+        .interrupt      = magellan_interrupt,
+        .connect        = magellan_connect,
+        .disconnect     = magellan_disconnect,
+};
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+static int __init magellan_init(void)
+{
+        serio_register_driver(&magellan_drv);
+        return 0;
+}
+
+static void __exit magellan_exit(void)
+{
+        serio_unregister_driver(&magellan_drv);
+}
+
+module_init(magellan_init);
+module_exit(magellan_exit);