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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [input/] [joystick/] [stinger.c] - Blame information for rev 62

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1 62 marcus.erl
/*
2
 * $Id: stinger.c,v 1.10 2002/01/22 20:29:31 vojtech Exp $
3
 *
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 *  Copyright (c) 2000-2001 Vojtech Pavlik
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 *  Copyright (c) 2000 Mark Fletcher
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 */
7
 
8
/*
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 * Gravis Stinger gamepad driver for Linux
10
 */
11
 
12
/*
13
 * This program is free warftware; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
23
 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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 *
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 *  Should you need to contact me, the author, you can do so either by
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 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
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 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
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 */
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/init.h>
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#define DRIVER_DESC     "Gravis Stinger gamepad driver"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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/*
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 * Constants.
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 */
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#define STINGER_MAX_LENGTH 8
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/*
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 * Per-Stinger data.
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 */
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struct stinger {
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        struct input_dev *dev;
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        int idx;
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        unsigned char data[STINGER_MAX_LENGTH];
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        char phys[32];
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};
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/*
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 * stinger_process_packet() decodes packets the driver receives from the
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 * Stinger. It updates the data accordingly.
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 */
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static void stinger_process_packet(struct stinger *stinger)
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{
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        struct input_dev *dev = stinger->dev;
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        unsigned char *data = stinger->data;
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        if (!stinger->idx) return;
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        input_report_key(dev, BTN_A,      ((data[0] & 0x20) >> 5));
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        input_report_key(dev, BTN_B,      ((data[0] & 0x10) >> 4));
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        input_report_key(dev, BTN_C,      ((data[0] & 0x08) >> 3));
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        input_report_key(dev, BTN_X,      ((data[0] & 0x04) >> 2));
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        input_report_key(dev, BTN_Y,      ((data[3] & 0x20) >> 5));
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        input_report_key(dev, BTN_Z,      ((data[3] & 0x10) >> 4));
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        input_report_key(dev, BTN_TL,     ((data[3] & 0x08) >> 3));
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        input_report_key(dev, BTN_TR,     ((data[3] & 0x04) >> 2));
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        input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1));
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        input_report_key(dev, BTN_START,   (data[3] & 0x01));
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        input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
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        input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
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        input_sync(dev);
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90
        return;
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}
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/*
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 * stinger_interrupt() is called by the low level driver when characters
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 * are ready for us. We then buffer them for further processing, or call the
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 * packet processing routine.
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 */
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static irqreturn_t stinger_interrupt(struct serio *serio,
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        unsigned char data, unsigned int flags)
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{
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        struct stinger *stinger = serio_get_drvdata(serio);
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        /* All Stinger packets are 4 bytes */
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        if (stinger->idx < STINGER_MAX_LENGTH)
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                stinger->data[stinger->idx++] = data;
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        if (stinger->idx == 4) {
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                stinger_process_packet(stinger);
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                stinger->idx = 0;
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        }
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        return IRQ_HANDLED;
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}
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/*
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 * stinger_disconnect() is the opposite of stinger_connect()
119
 */
120
 
121
static void stinger_disconnect(struct serio *serio)
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{
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        struct stinger *stinger = serio_get_drvdata(serio);
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125
        serio_close(serio);
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        serio_set_drvdata(serio, NULL);
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        input_unregister_device(stinger->dev);
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        kfree(stinger);
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}
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/*
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 * stinger_connect() is the routine that is called when someone adds a
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 * new serio device that supports Stinger protocol and registers it as
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 * an input device.
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 */
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static int stinger_connect(struct serio *serio, struct serio_driver *drv)
138
{
139
        struct stinger *stinger;
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        struct input_dev *input_dev;
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        int err = -ENOMEM;
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143
        stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL);
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        input_dev = input_allocate_device();
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        if (!stinger || !input_dev)
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                goto fail1;
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148
        stinger->dev = input_dev;
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        snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys);
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151
        input_dev->name = "Gravis Stinger";
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        input_dev->phys = stinger->phys;
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        input_dev->id.bustype = BUS_RS232;
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        input_dev->id.vendor = SERIO_STINGER;
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        input_dev->id.product = 0x0001;
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        input_dev->id.version = 0x0100;
157
        input_dev->dev.parent = &serio->dev;
158
 
159
        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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        input_dev->keybit[BIT_WORD(BTN_A)] = BIT_MASK(BTN_A) | BIT_MASK(BTN_B) |
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                BIT_MASK(BTN_C) | BIT_MASK(BTN_X) | BIT_MASK(BTN_Y) |
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                BIT_MASK(BTN_Z) | BIT_MASK(BTN_TL) | BIT_MASK(BTN_TR) |
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                BIT_MASK(BTN_START) | BIT_MASK(BTN_SELECT);
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        input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4);
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        input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4);
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167
        serio_set_drvdata(serio, stinger);
168
 
169
        err = serio_open(serio, drv);
170
        if (err)
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                goto fail2;
172
 
173
        err = input_register_device(stinger->dev);
174
        if (err)
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                goto fail3;
176
 
177
        return 0;
178
 
179
 fail3: serio_close(serio);
180
 fail2: serio_set_drvdata(serio, NULL);
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 fail1: input_free_device(input_dev);
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        kfree(stinger);
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        return err;
184
}
185
 
186
/*
187
 * The serio driver structure.
188
 */
189
 
190
static struct serio_device_id stinger_serio_ids[] = {
191
        {
192
                .type   = SERIO_RS232,
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                .proto  = SERIO_STINGER,
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                .id     = SERIO_ANY,
195
                .extra  = SERIO_ANY,
196
        },
197
        { 0 }
198
};
199
 
200
MODULE_DEVICE_TABLE(serio, stinger_serio_ids);
201
 
202
static struct serio_driver stinger_drv = {
203
        .driver         = {
204
                .name   = "stinger",
205
        },
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        .description    = DRIVER_DESC,
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        .id_table       = stinger_serio_ids,
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        .interrupt      = stinger_interrupt,
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        .connect        = stinger_connect,
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        .disconnect     = stinger_disconnect,
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};
212
 
213
/*
214
 * The functions for inserting/removing us as a module.
215
 */
216
 
217
static int __init stinger_init(void)
218
{
219
        return serio_register_driver(&stinger_drv);
220
}
221
 
222
static void __exit stinger_exit(void)
223
{
224
        serio_unregister_driver(&stinger_drv);
225
}
226
 
227
module_init(stinger_init);
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module_exit(stinger_exit);

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