1 files changed, 370 insertions, 0 deletions

diff --git a/drivers/input/mouse/sermouse.c b/drivers/input/mouse/sermouse.c
new file mode 100644
index 000000000000..d12b93ae3900
--- /dev/null
+++ b/drivers/input/mouse/sermouse.c
@@ -0,0 +1,370 @@
+/*
+ * $Id: sermouse.c,v 1.17 2002/03/13 10:03:43 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ */
+
+/*
+ *  Serial mouse 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/delay.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/config.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+#define DRIVER_DESC     "Serial mouse driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+static char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",
+                                        "Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",
+                                        "Logitech MZ++ Mouse"};
+
+struct sermouse {
+        struct input_dev dev;
+        signed char buf[8];
+        unsigned char count;
+        unsigned char type;
+        unsigned long last;
+        char phys[32];
+};
+
+/*
+ * sermouse_process_msc() analyzes the incoming MSC/Sun bytestream and
+ * applies some prediction to the data, resulting in 96 updates per
+ * second, which is as good as a PS/2 or USB mouse.
+ */
+
+static void sermouse_process_msc(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
+{
+        struct input_dev *dev = &sermouse->dev;
+        signed char *buf = sermouse->buf;
+
+        input_regs(dev, regs);
+
+        switch (sermouse->count) {
+
+                case 0:
+                        if ((data & 0xf8) != 0x80) return;
+                        input_report_key(dev, BTN_LEFT,   !(data & 4));
+                        input_report_key(dev, BTN_RIGHT,  !(data & 1));
+                        input_report_key(dev, BTN_MIDDLE, !(data & 2));
+                        break;
+
+                case 1:
+                case 3:
+                        input_report_rel(dev, REL_X, data / 2);
+                        input_report_rel(dev, REL_Y, -buf[1]);
+                        buf[0] = data - data / 2;
+                        break;
+
+                case 2:
+                case 4:
+                        input_report_rel(dev, REL_X, buf[0]);
+                        input_report_rel(dev, REL_Y, buf[1] - data);
+                        buf[1] = data / 2;
+                        break;
+        }
+
+        input_sync(dev);
+
+        if (++sermouse->count == (5 - ((sermouse->type == SERIO_SUN) << 1)))
+                sermouse->count = 0;
+}
+
+/*
+ * sermouse_process_ms() anlyzes the incoming MS(Z/+/++) bytestream and
+ * generates events. With prediction it gets 80 updates/sec, assuming
+ * standard 3-byte packets and 1200 bps.
+ */
+
+static void sermouse_process_ms(struct sermouse *sermouse, signed char data, struct pt_regs *regs)
+{
+        struct input_dev *dev = &sermouse->dev;
+        signed char *buf = sermouse->buf;
+
+        if (data & 0x40) sermouse->count = 0;
+
+        input_regs(dev, regs);
+
+        switch (sermouse->count) {
+
+                case 0:
+                        buf[1] = data;
+                        input_report_key(dev, BTN_LEFT,   (data >> 5) & 1);
+                        input_report_key(dev, BTN_RIGHT,  (data >> 4) & 1);
+                        break;
+
+                case 1:
+                        buf[2] = data;
+                        data = (signed char) (((buf[1] << 6) & 0xc0) | (data & 0x3f));
+                        input_report_rel(dev, REL_X, data / 2);
+                        input_report_rel(dev, REL_Y, buf[4]);
+                        buf[3] = data - data / 2;
+                        break;
+
+                case 2:
+                        /* Guessing the state of the middle button on 3-button MS-protocol mice - ugly. */
+                        if ((sermouse->type == SERIO_MS) && !data && !buf[2] && !((buf[0] & 0xf0) ^ buf[1]))
+                                input_report_key(dev, BTN_MIDDLE, !test_bit(BTN_MIDDLE, dev->key));
+                        buf[0] = buf[1];
+
+                        data = (signed char) (((buf[1] << 4) & 0xc0) | (data & 0x3f));
+                        input_report_rel(dev, REL_X, buf[3]);
+                        input_report_rel(dev, REL_Y, data - buf[4]);
+                        buf[4] = data / 2;
+                        break;
+
+                case 3:
+
+                        switch (sermouse->type) {
+
+                                case SERIO_MS:
+                                         sermouse->type = SERIO_MP;
+
+                                case SERIO_MP:
+                                        if ((data >> 2) & 3) break;     /* M++ Wireless Extension packet. */
+                                        input_report_key(dev, BTN_MIDDLE, (data >> 5) & 1);
+                                        input_report_key(dev, BTN_SIDE,   (data >> 4) & 1);
+                                        break;
+
+                                case SERIO_MZP:
+                                case SERIO_MZPP:
+                                        input_report_key(dev, BTN_SIDE,   (data >> 5) & 1);
+
+                                case SERIO_MZ:
+                                        input_report_key(dev, BTN_MIDDLE, (data >> 4) & 1);
+                                        input_report_rel(dev, REL_WHEEL,  (data & 8) - (data & 7));
+                                        break;
+                        }
+
+                        break;
+
+                case 4:
+                case 6: /* MZ++ packet type. We can get these bytes for M++ too but we ignore them later. */
+                        buf[1] = (data >> 2) & 0x0f;
+                        break;
+
+                case 5:
+                case 7: /* Ignore anything besides MZ++ */
+                        if (sermouse->type != SERIO_MZPP) break;
+
+                        switch (buf[1]) {
+
+                                case 1: /* Extra mouse info */
+
+                                        input_report_key(dev, BTN_SIDE, (data >> 4) & 1);
+                                        input_report_key(dev, BTN_EXTRA, (data >> 5) & 1);
+                                        input_report_rel(dev, data & 0x80 ? REL_HWHEEL : REL_WHEEL, (data & 7) - (data & 8));
+
+                                        break;
+
+                                default: /* We don't decode anything else yet. */
+
+                                        printk(KERN_WARNING
+                                                "sermouse.c: Received MZ++ packet %x, don't know how to handle.\n", buf[1]);
+                                        break;
+                        }
+
+                        break;
+        }
+
+        input_sync(dev);
+
+        sermouse->count++;
+}
+
+/*
+ * sermouse_interrupt() handles incoming characters, either gathering them into
+ * packets or passing them to the command routine as command output.
+ */
+
+static irqreturn_t sermouse_interrupt(struct serio *serio,
+                unsigned char data, unsigned int flags, struct pt_regs *regs)
+{
+        struct sermouse *sermouse = serio_get_drvdata(serio);
+
+        if (time_after(jiffies, sermouse->last + HZ/10)) sermouse->count = 0;
+        sermouse->last = jiffies;
+
+        if (sermouse->type > SERIO_SUN)
+                sermouse_process_ms(sermouse, data, regs);
+        else
+                sermouse_process_msc(sermouse, data, regs);
+        return IRQ_HANDLED;
+}
+
+/*
+ * sermouse_disconnect() cleans up after we don't want talk
+ * to the mouse anymore.
+ */
+
+static void sermouse_disconnect(struct serio *serio)
+{
+        struct sermouse *sermouse = serio_get_drvdata(serio);
+
+        input_unregister_device(&sermouse->dev);
+        serio_close(serio);
+        serio_set_drvdata(serio, NULL);
+        kfree(sermouse);
+}
+
+/*
+ * sermouse_connect() is a callback form the serio module when
+ * an unhandled serio port is found.
+ */
+
+static int sermouse_connect(struct serio *serio, struct serio_driver *drv)
+{
+        struct sermouse *sermouse;
+        unsigned char c;
+        int err;
+
+        if (!serio->id.proto || serio->id.proto > SERIO_MZPP)
+                return -ENODEV;
+
+        if (!(sermouse = kmalloc(sizeof(struct sermouse), GFP_KERNEL)))
+                return -ENOMEM;
+
+        memset(sermouse, 0, sizeof(struct sermouse));
+
+        init_input_dev(&sermouse->dev);
+        sermouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
+        sermouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);
+        sermouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
+        sermouse->dev.private = sermouse;
+
+        sermouse->type = serio->id.proto;
+        c = serio->id.extra;
+
+        if (c & 0x01) set_bit(BTN_MIDDLE, sermouse->dev.keybit);
+        if (c & 0x02) set_bit(BTN_SIDE, sermouse->dev.keybit);
+        if (c & 0x04) set_bit(BTN_EXTRA, sermouse->dev.keybit);
+        if (c & 0x10) set_bit(REL_WHEEL, sermouse->dev.relbit);
+        if (c & 0x20) set_bit(REL_HWHEEL, sermouse->dev.relbit);
+
+        sprintf(sermouse->phys, "%s/input0", serio->phys);
+
+        sermouse->dev.name = sermouse_protocols[sermouse->type];
+        sermouse->dev.phys = sermouse->phys;
+        sermouse->dev.id.bustype = BUS_RS232;
+        sermouse->dev.id.vendor = sermouse->type;
+        sermouse->dev.id.product = c;
+        sermouse->dev.id.version = 0x0100;
+        sermouse->dev.dev = &serio->dev;
+
+        serio_set_drvdata(serio, sermouse);
+
+        err = serio_open(serio, drv);
+        if (err) {
+                serio_set_drvdata(serio, NULL);
+                kfree(sermouse);
+                return err;
+        }
+
+        input_register_device(&sermouse->dev);
+
+        printk(KERN_INFO "input: %s on %s\n", sermouse_protocols[sermouse->type], serio->phys);
+
+        return 0;
+}
+
+static struct serio_device_id sermouse_serio_ids[] = {
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MSC,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_SUN,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MS,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MP,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MZ,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MZP,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_MZPP,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, sermouse_serio_ids);
+
+static struct serio_driver sermouse_drv = {
+        .driver         = {
+                .name   = "sermouse",
+        },
+        .description    = DRIVER_DESC,
+        .id_table       = sermouse_serio_ids,
+        .interrupt      = sermouse_interrupt,
+        .connect        = sermouse_connect,
+        .disconnect     = sermouse_disconnect,
+};
+
+static int __init sermouse_init(void)
+{
+        serio_register_driver(&sermouse_drv);
+        return 0;
+}
+
+static void __exit sermouse_exit(void)
+{
+        serio_unregister_driver(&sermouse_drv);
+}
+
+module_init(sermouse_init);
+module_exit(sermouse_exit);