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Linux/drivers/input/joystick/warrior.c

  1 /*
  2  *  Copyright (c) 1999-2001 Vojtech Pavlik
  3  */
  4 
  5 /*
  6  * Logitech WingMan Warrior joystick driver for Linux
  7  */
  8 
  9 /*
 10  * This program is free warftware; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License as published by
 12  * the Free Software Foundation; either version 2 of the License, or
 13  * (at your option) any later version.
 14  *
 15  * This program is distributed in the hope that it will be useful,
 16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  * GNU General Public License for more details.
 19  *
 20  * You should have received a copy of the GNU General Public License
 21  * along with this program; if not, write to the Free Software
 22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 23  *
 24  *  Should you need to contact me, the author, you can do so either by
 25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 27  */
 28 
 29 #include <linux/kernel.h>
 30 #include <linux/module.h>
 31 #include <linux/slab.h>
 32 #include <linux/input.h>
 33 #include <linux/serio.h>
 34 
 35 #define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
 36 
 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 38 MODULE_DESCRIPTION(DRIVER_DESC);
 39 MODULE_LICENSE("GPL");
 40 
 41 /*
 42  * Constants.
 43  */
 44 
 45 #define WARRIOR_MAX_LENGTH      16
 46 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
 47 
 48 /*
 49  * Per-Warrior data.
 50  */
 51 
 52 struct warrior {
 53         struct input_dev *dev;
 54         int idx, len;
 55         unsigned char data[WARRIOR_MAX_LENGTH];
 56         char phys[32];
 57 };
 58 
 59 /*
 60  * warrior_process_packet() decodes packets the driver receives from the
 61  * Warrior. It updates the data accordingly.
 62  */
 63 
 64 static void warrior_process_packet(struct warrior *warrior)
 65 {
 66         struct input_dev *dev = warrior->dev;
 67         unsigned char *data = warrior->data;
 68 
 69         if (!warrior->idx) return;
 70 
 71         switch ((data[0] >> 4) & 7) {
 72                 case 1:                                 /* Button data */
 73                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
 74                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
 75                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
 76                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
 77                         break;
 78                 case 3:                                 /* XY-axis info->data */
 79                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
 80                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
 81                         break;
 82                 case 5:                                 /* Throttle, spinner, hat info->data */
 83                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
 84                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
 85                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
 86                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
 87                         break;
 88         }
 89         input_sync(dev);
 90 }
 91 
 92 /*
 93  * warrior_interrupt() is called by the low level driver when characters
 94  * are ready for us. We then buffer them for further processing, or call the
 95  * packet processing routine.
 96  */
 97 
 98 static irqreturn_t warrior_interrupt(struct serio *serio,
 99                 unsigned char data, unsigned int flags)
100 {
101         struct warrior *warrior = serio_get_drvdata(serio);
102 
103         if (data & 0x80) {
104                 if (warrior->idx) warrior_process_packet(warrior);
105                 warrior->idx = 0;
106                 warrior->len = warrior_lengths[(data >> 4) & 7];
107         }
108 
109         if (warrior->idx < warrior->len)
110                 warrior->data[warrior->idx++] = data;
111 
112         if (warrior->idx == warrior->len) {
113                 if (warrior->idx) warrior_process_packet(warrior);
114                 warrior->idx = 0;
115                 warrior->len = 0;
116         }
117         return IRQ_HANDLED;
118 }
119 
120 /*
121  * warrior_disconnect() is the opposite of warrior_connect()
122  */
123 
124 static void warrior_disconnect(struct serio *serio)
125 {
126         struct warrior *warrior = serio_get_drvdata(serio);
127 
128         serio_close(serio);
129         serio_set_drvdata(serio, NULL);
130         input_unregister_device(warrior->dev);
131         kfree(warrior);
132 }
133 
134 /*
135  * warrior_connect() is the routine that is called when someone adds a
136  * new serio device. It looks for the Warrior, and if found, registers
137  * it as an input device.
138  */
139 
140 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
141 {
142         struct warrior *warrior;
143         struct input_dev *input_dev;
144         int err = -ENOMEM;
145 
146         warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
147         input_dev = input_allocate_device();
148         if (!warrior || !input_dev)
149                 goto fail1;
150 
151         warrior->dev = input_dev;
152         snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
153 
154         input_dev->name = "Logitech WingMan Warrior";
155         input_dev->phys = warrior->phys;
156         input_dev->id.bustype = BUS_RS232;
157         input_dev->id.vendor = SERIO_WARRIOR;
158         input_dev->id.product = 0x0001;
159         input_dev->id.version = 0x0100;
160         input_dev->dev.parent = &serio->dev;
161 
162         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
163                 BIT_MASK(EV_ABS);
164         input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) |
165                 BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2);
166         input_dev->relbit[0] = BIT_MASK(REL_DIAL);
167         input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
168         input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
169         input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
170         input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
171         input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
172 
173         serio_set_drvdata(serio, warrior);
174 
175         err = serio_open(serio, drv);
176         if (err)
177                 goto fail2;
178 
179         err = input_register_device(warrior->dev);
180         if (err)
181                 goto fail3;
182 
183         return 0;
184 
185  fail3: serio_close(serio);
186  fail2: serio_set_drvdata(serio, NULL);
187  fail1: input_free_device(input_dev);
188         kfree(warrior);
189         return err;
190 }
191 
192 /*
193  * The serio driver structure.
194  */
195 
196 static struct serio_device_id warrior_serio_ids[] = {
197         {
198                 .type   = SERIO_RS232,
199                 .proto  = SERIO_WARRIOR,
200                 .id     = SERIO_ANY,
201                 .extra  = SERIO_ANY,
202         },
203         { 0 }
204 };
205 
206 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
207 
208 static struct serio_driver warrior_drv = {
209         .driver         = {
210                 .name   = "warrior",
211         },
212         .description    = DRIVER_DESC,
213         .id_table       = warrior_serio_ids,
214         .interrupt      = warrior_interrupt,
215         .connect        = warrior_connect,
216         .disconnect     = warrior_disconnect,
217 };
218 
219 module_serio_driver(warrior_drv);
220 

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