| /* |
| * $Id: stinger.c,v 1.10 2002/01/22 20:29:31 vojtech Exp $ |
| * |
| * Copyright (c) 2000-2001 Vojtech Pavlik |
| * Copyright (c) 2000 Mark Fletcher |
| */ |
| |
| /* |
| * Gravis Stinger gamepad driver for Linux |
| */ |
| |
| /* |
| * This program is free warftware; 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 "Gravis Stinger gamepad driver" |
| |
| MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| /* |
| * Constants. |
| */ |
| |
| #define STINGER_MAX_LENGTH 8 |
| |
| /* |
| * Per-Stinger data. |
| */ |
| |
| struct stinger { |
| struct input_dev *dev; |
| int idx; |
| unsigned char data[STINGER_MAX_LENGTH]; |
| char phys[32]; |
| }; |
| |
| /* |
| * stinger_process_packet() decodes packets the driver receives from the |
| * Stinger. It updates the data accordingly. |
| */ |
| |
| static void stinger_process_packet(struct stinger *stinger) |
| { |
| struct input_dev *dev = stinger->dev; |
| unsigned char *data = stinger->data; |
| |
| if (!stinger->idx) return; |
| |
| input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5)); |
| input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4)); |
| input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3)); |
| input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2)); |
| input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5)); |
| input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4)); |
| input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3)); |
| input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2)); |
| input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1)); |
| input_report_key(dev, BTN_START, (data[3] & 0x01)); |
| |
| input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6)); |
| input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F)); |
| |
| input_sync(dev); |
| |
| return; |
| } |
| |
| /* |
| * stinger_interrupt() is called by the low level driver when characters |
| * are ready for us. We then buffer them for further processing, or call the |
| * packet processing routine. |
| */ |
| |
| static irqreturn_t stinger_interrupt(struct serio *serio, |
| unsigned char data, unsigned int flags) |
| { |
| struct stinger *stinger = serio_get_drvdata(serio); |
| |
| /* All Stinger packets are 4 bytes */ |
| |
| if (stinger->idx < STINGER_MAX_LENGTH) |
| stinger->data[stinger->idx++] = data; |
| |
| if (stinger->idx == 4) { |
| stinger_process_packet(stinger); |
| stinger->idx = 0; |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * stinger_disconnect() is the opposite of stinger_connect() |
| */ |
| |
| static void stinger_disconnect(struct serio *serio) |
| { |
| struct stinger *stinger = serio_get_drvdata(serio); |
| |
| serio_close(serio); |
| serio_set_drvdata(serio, NULL); |
| input_unregister_device(stinger->dev); |
| kfree(stinger); |
| } |
| |
| /* |
| * stinger_connect() is the routine that is called when someone adds a |
| * new serio device that supports Stinger protocol and registers it as |
| * an input device. |
| */ |
| |
| static int stinger_connect(struct serio *serio, struct serio_driver *drv) |
| { |
| struct stinger *stinger; |
| struct input_dev *input_dev; |
| int err = -ENOMEM; |
| |
| stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!stinger || !input_dev) |
| goto fail1; |
| |
| stinger->dev = input_dev; |
| snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys); |
| |
| input_dev->name = "Gravis Stinger"; |
| input_dev->phys = stinger->phys; |
| input_dev->id.bustype = BUS_RS232; |
| input_dev->id.vendor = SERIO_STINGER; |
| input_dev->id.product = 0x0001; |
| input_dev->id.version = 0x0100; |
| input_dev->cdev.dev = &serio->dev; |
| |
| input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
| input_dev->keybit[LONG(BTN_A)] = BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_X) | |
| BIT(BTN_Y) | BIT(BTN_Z) | BIT(BTN_TL) | BIT(BTN_TR) | |
| BIT(BTN_START) | BIT(BTN_SELECT); |
| input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4); |
| input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4); |
| |
| serio_set_drvdata(serio, stinger); |
| |
| err = serio_open(serio, drv); |
| if (err) |
| goto fail2; |
| |
| err = input_register_device(stinger->dev); |
| if (err) |
| goto fail3; |
| |
| return 0; |
| |
| fail3: serio_close(serio); |
| fail2: serio_set_drvdata(serio, NULL); |
| fail1: input_free_device(input_dev); |
| kfree(stinger); |
| return err; |
| } |
| |
| /* |
| * The serio driver structure. |
| */ |
| |
| static struct serio_device_id stinger_serio_ids[] = { |
| { |
| .type = SERIO_RS232, |
| .proto = SERIO_STINGER, |
| .id = SERIO_ANY, |
| .extra = SERIO_ANY, |
| }, |
| { 0 } |
| }; |
| |
| MODULE_DEVICE_TABLE(serio, stinger_serio_ids); |
| |
| static struct serio_driver stinger_drv = { |
| .driver = { |
| .name = "stinger", |
| }, |
| .description = DRIVER_DESC, |
| .id_table = stinger_serio_ids, |
| .interrupt = stinger_interrupt, |
| .connect = stinger_connect, |
| .disconnect = stinger_disconnect, |
| }; |
| |
| /* |
| * The functions for inserting/removing us as a module. |
| */ |
| |
| static int __init stinger_init(void) |
| { |
| return serio_register_driver(&stinger_drv); |
| } |
| |
| static void __exit stinger_exit(void) |
| { |
| serio_unregister_driver(&stinger_drv); |
| } |
| |
| module_init(stinger_init); |
| module_exit(stinger_exit); |