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Linux/drivers/input/joystick/spaceorb.c

  1 /*
  2  *  Copyright (c) 1999-2001 Vojtech Pavlik
  3  *
  4  *  Based on the work of:
  5  *      David Thompson
  6  */
  7 
  8 /*
  9  * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
 10  */
 11 
 12 /*
 13  * This program is free software; you can redistribute it and/or modify
 14  * it under the terms of the GNU General Public License as published by
 15  * the Free Software Foundation; either version 2 of the License, or
 16  * (at your option) any later version.
 17  *
 18  * This program is distributed in the hope that it will be useful,
 19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 21  * GNU General Public License for more details.
 22  *
 23  * You should have received a copy of the GNU General Public License
 24  * along with this program; if not, write to the Free Software
 25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 26  *
 27  *  Should you need to contact me, the author, you can do so either by
 28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 30  */
 31 
 32 #include <linux/kernel.h>
 33 #include <linux/slab.h>
 34 #include <linux/module.h>
 35 #include <linux/input.h>
 36 #include <linux/serio.h>
 37 
 38 #define DRIVER_DESC     "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
 39 
 40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 41 MODULE_DESCRIPTION(DRIVER_DESC);
 42 MODULE_LICENSE("GPL");
 43 
 44 /*
 45  * Constants.
 46  */
 47 
 48 #define SPACEORB_MAX_LENGTH     64
 49 
 50 static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
 51 static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
 52 
 53 /*
 54  * Per-Orb data.
 55  */
 56 
 57 struct spaceorb {
 58         struct input_dev *dev;
 59         int idx;
 60         unsigned char data[SPACEORB_MAX_LENGTH];
 61         char phys[32];
 62 };
 63 
 64 static unsigned char spaceorb_xor[] = "SpaceWare";
 65 
 66 static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
 67                 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
 68 
 69 /*
 70  * spaceorb_process_packet() decodes packets the driver receives from the
 71  * SpaceOrb.
 72  */
 73 
 74 static void spaceorb_process_packet(struct spaceorb *spaceorb)
 75 {
 76         struct input_dev *dev = spaceorb->dev;
 77         unsigned char *data = spaceorb->data;
 78         unsigned char c = 0;
 79         int axes[6];
 80         int i;
 81 
 82         if (spaceorb->idx < 2) return;
 83         for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
 84         if (c) return;
 85 
 86         switch (data[0]) {
 87 
 88                 case 'R':                               /* Reset packet */
 89                         spaceorb->data[spaceorb->idx - 1] = 0;
 90                         for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
 91                         printk(KERN_INFO "input: %s [%s] is %s\n",
 92                                  dev->name, spaceorb->data + i, spaceorb->phys);
 93                         break;
 94 
 95                 case 'D':                               /* Ball + button data */
 96                         if (spaceorb->idx != 12) return;
 97                         for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
 98                         axes[0] = ( data[2]      << 3) | (data[ 3] >> 4);
 99                         axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
100                         axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
101                         axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
102                         axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
103                         axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
104                         for (i = 0; i < 6; i++)
105                                 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
106                         for (i = 0; i < 6; i++)
107                                 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
108                         break;
109 
110                 case 'K':                               /* Button data */
111                         if (spaceorb->idx != 5) return;
112                         for (i = 0; i < 6; i++)
113                                 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
114 
115                         break;
116 
117                 case 'E':                               /* Error packet */
118                         if (spaceorb->idx != 4) return;
119                         printk(KERN_ERR "spaceorb: Device error. [ ");
120                         for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
121                         printk("]\n");
122                         break;
123         }
124 
125         input_sync(dev);
126 }
127 
128 static irqreturn_t spaceorb_interrupt(struct serio *serio,
129                 unsigned char data, unsigned int flags)
130 {
131         struct spaceorb* spaceorb = serio_get_drvdata(serio);
132 
133         if (~data & 0x80) {
134                 if (spaceorb->idx) spaceorb_process_packet(spaceorb);
135                 spaceorb->idx = 0;
136         }
137         if (spaceorb->idx < SPACEORB_MAX_LENGTH)
138                 spaceorb->data[spaceorb->idx++] = data & 0x7f;
139         return IRQ_HANDLED;
140 }
141 
142 /*
143  * spaceorb_disconnect() is the opposite of spaceorb_connect()
144  */
145 
146 static void spaceorb_disconnect(struct serio *serio)
147 {
148         struct spaceorb* spaceorb = serio_get_drvdata(serio);
149 
150         serio_close(serio);
151         serio_set_drvdata(serio, NULL);
152         input_unregister_device(spaceorb->dev);
153         kfree(spaceorb);
154 }
155 
156 /*
157  * spaceorb_connect() is the routine that is called when someone adds a
158  * new serio device that supports SpaceOrb/Avenger protocol and registers
159  * it as an input device.
160  */
161 
162 static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
163 {
164         struct spaceorb *spaceorb;
165         struct input_dev *input_dev;
166         int err = -ENOMEM;
167         int i;
168 
169         spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL);
170         input_dev = input_allocate_device();
171         if (!spaceorb || !input_dev)
172                 goto fail1;
173 
174         spaceorb->dev = input_dev;
175         snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
176 
177         input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
178         input_dev->phys = spaceorb->phys;
179         input_dev->id.bustype = BUS_RS232;
180         input_dev->id.vendor = SERIO_SPACEORB;
181         input_dev->id.product = 0x0001;
182         input_dev->id.version = 0x0100;
183         input_dev->dev.parent = &serio->dev;
184 
185         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
186 
187         for (i = 0; i < 6; i++)
188                 set_bit(spaceorb_buttons[i], input_dev->keybit);
189 
190         for (i = 0; i < 6; i++)
191                 input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
192 
193         serio_set_drvdata(serio, spaceorb);
194 
195         err = serio_open(serio, drv);
196         if (err)
197                 goto fail2;
198 
199         err = input_register_device(spaceorb->dev);
200         if (err)
201                 goto fail3;
202 
203         return 0;
204 
205  fail3: serio_close(serio);
206  fail2: serio_set_drvdata(serio, NULL);
207  fail1: input_free_device(input_dev);
208         kfree(spaceorb);
209         return err;
210 }
211 
212 /*
213  * The serio driver structure.
214  */
215 
216 static struct serio_device_id spaceorb_serio_ids[] = {
217         {
218                 .type   = SERIO_RS232,
219                 .proto  = SERIO_SPACEORB,
220                 .id     = SERIO_ANY,
221                 .extra  = SERIO_ANY,
222         },
223         { 0 }
224 };
225 
226 MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
227 
228 static struct serio_driver spaceorb_drv = {
229         .driver         = {
230                 .name   = "spaceorb",
231         },
232         .description    = DRIVER_DESC,
233         .id_table       = spaceorb_serio_ids,
234         .interrupt      = spaceorb_interrupt,
235         .connect        = spaceorb_connect,
236         .disconnect     = spaceorb_disconnect,
237 };
238 
239 module_serio_driver(spaceorb_drv);
240 

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