diff options
Diffstat (limited to 'drivers/input/mouse/sermouse.c')
| -rw-r--r-- | drivers/input/mouse/sermouse.c | 370 |
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 00000000000..d12b93ae390 --- /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); |