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Linux/drivers/input/joystick/spaceball.c

  1 /*
  2  *  Copyright (c) 1999-2001 Vojtech Pavlik
  3  *
  4  *  Based on the work of:
  5  *      David Thompson
  6  *      Joseph Krahn
  7  */
  8 
  9 /*
 10  * SpaceTec SpaceBall 2003/3003/4000 FLX driver for Linux
 11  */
 12 
 13 /*
 14  * This program is free software; you can redistribute it and/or modify
 15  * it under the terms of the GNU General Public License as published by
 16  * the Free Software Foundation; either version 2 of the License, or
 17  * (at your option) any later version.
 18  *
 19  * This program is distributed in the hope that it will be useful,
 20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 22  * GNU General Public License for more details.
 23  *
 24  * You should have received a copy of the GNU General Public License
 25  * along with this program; if not, write to the Free Software
 26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 27  *
 28  *  Should you need to contact me, the author, you can do so either by
 29  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 30  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 31  */
 32 
 33 #include <linux/kernel.h>
 34 #include <linux/slab.h>
 35 #include <linux/module.h>
 36 #include <linux/input.h>
 37 #include <linux/serio.h>
 38 
 39 #define DRIVER_DESC     "SpaceTec SpaceBall 2003/3003/4000 FLX driver"
 40 
 41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 42 MODULE_DESCRIPTION(DRIVER_DESC);
 43 MODULE_LICENSE("GPL");
 44 
 45 /*
 46  * Constants.
 47  */
 48 
 49 #define SPACEBALL_MAX_LENGTH    128
 50 #define SPACEBALL_MAX_ID        9
 51 
 52 #define SPACEBALL_1003      1
 53 #define SPACEBALL_2003B     3
 54 #define SPACEBALL_2003C     4
 55 #define SPACEBALL_3003C     7
 56 #define SPACEBALL_4000FLX   8
 57 #define SPACEBALL_4000FLX_L 9
 58 
 59 static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY };
 60 static char *spaceball_names[] = {
 61         "?", "SpaceTec SpaceBall 1003", "SpaceTec SpaceBall 2003", "SpaceTec SpaceBall 2003B",
 62         "SpaceTec SpaceBall 2003C", "SpaceTec SpaceBall 3003", "SpaceTec SpaceBall SpaceController",
 63         "SpaceTec SpaceBall 3003C", "SpaceTec SpaceBall 4000FLX", "SpaceTec SpaceBall 4000FLX Lefty" };
 64 
 65 /*
 66  * Per-Ball data.
 67  */
 68 
 69 struct spaceball {
 70         struct input_dev *dev;
 71         int idx;
 72         int escape;
 73         unsigned char data[SPACEBALL_MAX_LENGTH];
 74         char phys[32];
 75 };
 76 
 77 /*
 78  * spaceball_process_packet() decodes packets the driver receives from the
 79  * SpaceBall.
 80  */
 81 
 82 static void spaceball_process_packet(struct spaceball* spaceball)
 83 {
 84         struct input_dev *dev = spaceball->dev;
 85         unsigned char *data = spaceball->data;
 86         int i;
 87 
 88         if (spaceball->idx < 2) return;
 89 
 90         switch (spaceball->data[0]) {
 91 
 92                 case 'D':                                       /* Ball data */
 93                         if (spaceball->idx != 15) return;
 94                         for (i = 0; i < 6; i++)
 95                                 input_report_abs(dev, spaceball_axes[i],
 96                                         (__s16)((data[2 * i + 3] << 8) | data[2 * i + 2]));
 97                         break;
 98 
 99                 case 'K':                                       /* Button data */
100                         if (spaceball->idx != 3) return;
101                         input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20));
102                         input_report_key(dev, BTN_2, data[2] & 0x02);
103                         input_report_key(dev, BTN_3, data[2] & 0x04);
104                         input_report_key(dev, BTN_4, data[2] & 0x08);
105                         input_report_key(dev, BTN_5, data[1] & 0x01);
106                         input_report_key(dev, BTN_6, data[1] & 0x02);
107                         input_report_key(dev, BTN_7, data[1] & 0x04);
108                         input_report_key(dev, BTN_8, data[1] & 0x10);
109                         break;
110 
111                 case '.':                                       /* Advanced button data */
112                         if (spaceball->idx != 3) return;
113                         input_report_key(dev, BTN_1, data[2] & 0x01);
114                         input_report_key(dev, BTN_2, data[2] & 0x02);
115                         input_report_key(dev, BTN_3, data[2] & 0x04);
116                         input_report_key(dev, BTN_4, data[2] & 0x08);
117                         input_report_key(dev, BTN_5, data[2] & 0x10);
118                         input_report_key(dev, BTN_6, data[2] & 0x20);
119                         input_report_key(dev, BTN_7, data[2] & 0x80);
120                         input_report_key(dev, BTN_8, data[1] & 0x01);
121                         input_report_key(dev, BTN_9, data[1] & 0x02);
122                         input_report_key(dev, BTN_A, data[1] & 0x04);
123                         input_report_key(dev, BTN_B, data[1] & 0x08);
124                         input_report_key(dev, BTN_C, data[1] & 0x10);
125                         input_report_key(dev, BTN_MODE, data[1] & 0x20);
126                         break;
127 
128                 case 'E':                                       /* Device error */
129                         spaceball->data[spaceball->idx - 1] = 0;
130                         printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1);
131                         break;
132 
133                 case '?':                                       /* Bad command packet */
134                         spaceball->data[spaceball->idx - 1] = 0;
135                         printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1);
136                         break;
137         }
138 
139         input_sync(dev);
140 }
141 
142 /*
143  * Spaceball 4000 FLX packets all start with a one letter packet-type decriptor,
144  * and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which
145  * can occur in the axis values.
146  */
147 
148 static irqreturn_t spaceball_interrupt(struct serio *serio,
149                 unsigned char data, unsigned int flags)
150 {
151         struct spaceball *spaceball = serio_get_drvdata(serio);
152 
153         switch (data) {
154                 case 0xd:
155                         spaceball_process_packet(spaceball);
156                         spaceball->idx = 0;
157                         spaceball->escape = 0;
158                         break;
159                 case '^':
160                         if (!spaceball->escape) {
161                                 spaceball->escape = 1;
162                                 break;
163                         }
164                         spaceball->escape = 0;
165                 case 'M':
166                 case 'Q':
167                 case 'S':
168                         if (spaceball->escape) {
169                                 spaceball->escape = 0;
170                                 data &= 0x1f;
171                         }
172                 default:
173                         if (spaceball->escape)
174                                 spaceball->escape = 0;
175                         if (spaceball->idx < SPACEBALL_MAX_LENGTH)
176                                 spaceball->data[spaceball->idx++] = data;
177                         break;
178         }
179         return IRQ_HANDLED;
180 }
181 
182 /*
183  * spaceball_disconnect() is the opposite of spaceball_connect()
184  */
185 
186 static void spaceball_disconnect(struct serio *serio)
187 {
188         struct spaceball* spaceball = serio_get_drvdata(serio);
189 
190         serio_close(serio);
191         serio_set_drvdata(serio, NULL);
192         input_unregister_device(spaceball->dev);
193         kfree(spaceball);
194 }
195 
196 /*
197  * spaceball_connect() is the routine that is called when someone adds a
198  * new serio device that supports Spaceball protocol and registers it as
199  * an input device.
200  */
201 
202 static int spaceball_connect(struct serio *serio, struct serio_driver *drv)
203 {
204         struct spaceball *spaceball;
205         struct input_dev *input_dev;
206         int err = -ENOMEM;
207         int i, id;
208 
209         if ((id = serio->id.id) > SPACEBALL_MAX_ID)
210                 return -ENODEV;
211 
212         spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL);
213         input_dev = input_allocate_device();
214         if (!spaceball || !input_dev)
215                 goto fail1;
216 
217         spaceball->dev = input_dev;
218         snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys);
219 
220         input_dev->name = spaceball_names[id];
221         input_dev->phys = spaceball->phys;
222         input_dev->id.bustype = BUS_RS232;
223         input_dev->id.vendor = SERIO_SPACEBALL;
224         input_dev->id.product = id;
225         input_dev->id.version = 0x0100;
226         input_dev->dev.parent = &serio->dev;
227 
228         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
229 
230         switch (id) {
231                 case SPACEBALL_4000FLX:
232                 case SPACEBALL_4000FLX_L:
233                         input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_9);
234                         input_dev->keybit[BIT_WORD(BTN_A)] |= BIT_MASK(BTN_A) |
235                                 BIT_MASK(BTN_B) | BIT_MASK(BTN_C) |
236                                 BIT_MASK(BTN_MODE);
237                 default:
238                         input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_2) |
239                                 BIT_MASK(BTN_3) | BIT_MASK(BTN_4) |
240                                 BIT_MASK(BTN_5) | BIT_MASK(BTN_6) |
241                                 BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
242                 case SPACEBALL_3003C:
243                         input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1) |
244                                 BIT_MASK(BTN_8);
245         }
246 
247         for (i = 0; i < 3; i++) {
248                 input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40);
249                 input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8);
250         }
251 
252         serio_set_drvdata(serio, spaceball);
253 
254         err = serio_open(serio, drv);
255         if (err)
256                 goto fail2;
257 
258         err = input_register_device(spaceball->dev);
259         if (err)
260                 goto fail3;
261 
262         return 0;
263 
264  fail3: serio_close(serio);
265  fail2: serio_set_drvdata(serio, NULL);
266  fail1: input_free_device(input_dev);
267         kfree(spaceball);
268         return err;
269 }
270 
271 /*
272  * The serio driver structure.
273  */
274 
275 static struct serio_device_id spaceball_serio_ids[] = {
276         {
277                 .type   = SERIO_RS232,
278                 .proto  = SERIO_SPACEBALL,
279                 .id     = SERIO_ANY,
280                 .extra  = SERIO_ANY,
281         },
282         { 0 }
283 };
284 
285 MODULE_DEVICE_TABLE(serio, spaceball_serio_ids);
286 
287 static struct serio_driver spaceball_drv = {
288         .driver         = {
289                 .name   = "spaceball",
290         },
291         .description    = DRIVER_DESC,
292         .id_table       = spaceball_serio_ids,
293         .interrupt      = spaceball_interrupt,
294         .connect        = spaceball_connect,
295         .disconnect     = spaceball_disconnect,
296 };
297 
298 module_serio_driver(spaceball_drv);
299 

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