| /* |
| * $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->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); |
| |
| serio_close(serio); |
| serio_set_drvdata(serio, NULL); |
| input_unregister_device(sermouse->dev); |
| 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; |
| struct input_dev *input_dev; |
| unsigned char c = serio->id.extra; |
| int err = -ENOMEM; |
| |
| sermouse = kzalloc(sizeof(struct sermouse), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!sermouse || !input_dev) |
| goto fail; |
| |
| sermouse->dev = input_dev; |
| snprintf(sermouse->phys, sizeof(sermouse->phys), "%s/input0", serio->phys); |
| sermouse->type = serio->id.proto; |
| |
| input_dev->name = sermouse_protocols[sermouse->type]; |
| input_dev->phys = sermouse->phys; |
| input_dev->id.bustype = BUS_RS232; |
| input_dev->id.vendor = sermouse->type; |
| input_dev->id.product = c; |
| input_dev->id.version = 0x0100; |
| input_dev->cdev.dev = &serio->dev; |
| |
| input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); |
| input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT); |
| input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); |
| input_dev->private = sermouse; |
| |
| if (c & 0x01) set_bit(BTN_MIDDLE, input_dev->keybit); |
| if (c & 0x02) set_bit(BTN_SIDE, input_dev->keybit); |
| if (c & 0x04) set_bit(BTN_EXTRA, input_dev->keybit); |
| if (c & 0x10) set_bit(REL_WHEEL, input_dev->relbit); |
| if (c & 0x20) set_bit(REL_HWHEEL, input_dev->relbit); |
| |
| serio_set_drvdata(serio, sermouse); |
| |
| err = serio_open(serio, drv); |
| if (err) |
| goto fail; |
| |
| input_register_device(sermouse->dev); |
| |
| return 0; |
| |
| fail: serio_set_drvdata(serio, NULL); |
| input_free_device(input_dev); |
| kfree(sermouse); |
| return err; |
| } |
| |
| 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); |