drivers/input/joystick/iforce/iforce-packets.c

   1 /*
   2  * $Id: iforce-packets.c,v 1.16 2002/07/07 10:22:50 jdeneux Exp $
   3  *
   4  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   5  *  Copyright (c) 2001-2002 Johann Deneux <deneux@ifrance.com>
   6  *
   7  *  USB/RS232 I-Force joysticks and wheels.
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  *
  25  * Should you need to contact me, the author, you can do so either by
  26  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  27  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  28  */
  29
  30 #include "iforce.h"
  31
  32 static struct {
  33         __s32 x;
  34         __s32 y;
  35 } iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  36
  37
  38 void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data)
  39 {
  40         int i;
  41
  42         printk(KERN_DEBUG "iforce.c: %s ( cmd = %04x, data = ", msg, cmd);
  43         for (i = 0; i < LO(cmd); i++)
  44                 printk("%02x ", data[i]);
  45         printk(")\n");
  46 }
  47
  48 /*
  49  * Send a packet of bytes to the device
  50  */
  51 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
  52 {
  53         /* Copy data to buffer */
  54         int n = LO(cmd);
  55         int c;
  56         int empty;
  57         int head, tail;
  58         unsigned long flags;
  59
  60 /*
  61  * Update head and tail of xmit buffer
  62  */
  63         spin_lock_irqsave(&iforce->xmit_lock, flags);
  64
  65         head = iforce->xmit.head;
  66         tail = iforce->xmit.tail;
  67
  68         if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
  69                 printk(KERN_WARNING "iforce.c: not enough space in xmit buffer to send new packet\n");
  70                 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  71                 return -1;
  72         }
  73
  74         empty = head == tail;
  75         XMIT_INC(iforce->xmit.head, n+2);
  76
  77 /*
  78  * Store packet in xmit buffer
  79  */
  80         iforce->xmit.buf[head] = HI(cmd);
  81         XMIT_INC(head, 1);
  82         iforce->xmit.buf[head] = LO(cmd);
  83         XMIT_INC(head, 1);
  84
  85         c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
  86         if (n < c) c=n;
  87
  88         memcpy(&iforce->xmit.buf[head],
  89                data,
  90                c);
  91         if (n != c) {
  92                 memcpy(&iforce->xmit.buf[0],
  93                        data + c,
  94                        n - c);
  95         }
  96         XMIT_INC(head, n);
  97
  98         spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  99 /*
 100  * If necessary, start the transmission
 101  */
 102         switch (iforce->bus) {
 103
 104 #ifdef CONFIG_JOYSTICK_IFORCE_232
 105                 case IFORCE_232:
 106                 if (empty)
 107                         iforce_serial_xmit(iforce);
 108                 break;
 109 #endif
 110 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 111                 case IFORCE_USB:
 112
 113                 if (iforce->usbdev && empty &&
 114                         !test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
 115
 116                         iforce_usb_xmit(iforce);
 117                 }
 118                 break;
 119 #endif
 120         }
 121         return 0;
 122 }
 123
 124 /* Start or stop an effect */
 125 int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
 126 {
 127         unsigned char data[3];
 128
 129 printk(KERN_DEBUG "iforce-packets.c: control_playback %d %d\n", id, value);
 130
 131         data[0] = LO(id);
 132         data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
 133         data[2] = LO(value);
 134         return iforce_send_packet(iforce, FF_CMD_PLAY, data);
 135 }
 136
 137 /* Mark an effect that was being updated as ready. That means it can be updated
 138  * again */
 139 static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
 140 {
 141         int i;
 142         for (i=0; i<iforce->dev.ff_effects_max; ++i) {
 143                 if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
 144                     (iforce->core_effects[i].mod1_chunk.start == addr ||
 145                      iforce->core_effects[i].mod2_chunk.start == addr)) {
 146                         clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
 147                         return 0;
 148                 }
 149         }
 150         printk(KERN_WARNING "iforce-packets.c: unused effect %04x updated !!!\n", addr);
 151         return -1;
 152 }
 153
 154 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data, struct pt_regs *regs)
 155 {
 156         struct input_dev *dev = &iforce->dev;
 157         int i;
 158         static int being_used = 0;
 159
 160         if (being_used)
 161                 printk(KERN_WARNING "iforce-packets.c: re-entrant call to iforce_process %d\n", being_used);
 162         being_used++;
 163
 164 #ifdef CONFIG_JOYSTICK_IFORCE_232
 165         if (HI(iforce->expect_packet) == HI(cmd)) {
 166                 iforce->expect_packet = 0;
 167                 iforce->ecmd = cmd;
 168                 memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
 169                 wake_up(&iforce->wait);
 170         }
 171 #endif
 172
 173         if (!iforce->type) {
 174                 being_used--;
 175                 return;
 176         }
 177
 178         switch (HI(cmd)) {
 179
 180                 case 0x01:      /* joystick position data */
 181                 case 0x03:      /* wheel position data */
 182
 183                         input_regs(dev, regs);
 184
 185                         if (HI(cmd) == 1) {
 186                                 input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
 187                                 input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
 188                                 input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
 189                                 if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
 190                                         input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
 191                         } else {
 192                                 input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
 193                                 input_report_abs(dev, ABS_GAS,   255 - data[2]);
 194                                 input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
 195                         }
 196
 197                         input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
 198                         input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
 199
 200                         for (i = 0; iforce->type->btn[i] >= 0; i++)
 201                                 input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
 202
 203                         /* If there are untouched bits left, interpret them as the second hat */
 204                         if (i <= 8) {
 205                                 int btns = data[6];
 206                                 if (test_bit(ABS_HAT1X, dev->absbit)) {
 207                                         if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
 208                                         else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
 209                                         else input_report_abs(dev, ABS_HAT1X, 0);
 210                                 }
 211                                 if (test_bit(ABS_HAT1Y, dev->absbit)) {
 212                                         if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
 213                                         else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
 214                                         else input_report_abs(dev, ABS_HAT1Y, 0);
 215                                 }
 216                         }
 217
 218                         input_sync(dev);
 219
 220                         break;
 221
 222                 case 0x02:      /* status report */
 223                         input_regs(dev, regs);
 224                         input_report_key(dev, BTN_DEAD, data[0] & 0x02);
 225                         input_sync(dev);
 226
 227                         /* Check if an effect was just started or stopped */
 228                         i = data[1] & 0x7f;
 229                         if (data[1] & 0x80) {
 230                                 if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 231                                 /* Report play event */
 232                                 input_report_ff_status(dev, i, FF_STATUS_PLAYING);
 233                                 }
 234                         }
 235                         else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 236                                 /* Report stop event */
 237                                 input_report_ff_status(dev, i, FF_STATUS_STOPPED);
 238                         }
 239                         if (LO(cmd) > 3) {
 240                                 int j;
 241                                 for (j=3; j<LO(cmd); j+=2) {
 242                                         mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
 243                                 }
 244                         }
 245                         break;
 246         }
 247         being_used--;
 248 }
 249
 250 int iforce_get_id_packet(struct iforce *iforce, char *packet)
 251 {
 252         DECLARE_WAITQUEUE(wait, current);
 253         int timeout = HZ; /* 1 second */
 254
 255         switch (iforce->bus) {
 256
 257         case IFORCE_USB:
 258
 259 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 260                 iforce->cr.bRequest = packet[0];
 261                 iforce->ctrl->dev = iforce->usbdev;
 262
 263                 set_current_state(TASK_INTERRUPTIBLE);
 264                 add_wait_queue(&iforce->wait, &wait);
 265
 266                 if (usb_submit_urb(iforce->ctrl, GFP_ATOMIC)) {
 267                         set_current_state(TASK_RUNNING);
 268                         remove_wait_queue(&iforce->wait, &wait);
 269                         return -1;
 270                 }
 271
 272                 while (timeout && iforce->ctrl->status == -EINPROGRESS)
 273                         timeout = schedule_timeout(timeout);
 274
 275                 set_current_state(TASK_RUNNING);
 276                 remove_wait_queue(&iforce->wait, &wait);
 277
 278                 if (!timeout) {
 279                         usb_unlink_urb(iforce->ctrl);
 280                         return -1;
 281                 }
 282 #else
 283                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = USB!\n");
 284 #endif
 285                 break;
 286
 287         case IFORCE_232:
 288
 289 #ifdef CONFIG_JOYSTICK_IFORCE_232
 290                 iforce->expect_packet = FF_CMD_QUERY;
 291                 iforce_send_packet(iforce, FF_CMD_QUERY, packet);
 292
 293                 set_current_state(TASK_INTERRUPTIBLE);
 294                 add_wait_queue(&iforce->wait, &wait);
 295
 296                 while (timeout && iforce->expect_packet)
 297                         timeout = schedule_timeout(timeout);
 298
 299                 set_current_state(TASK_RUNNING);
 300                 remove_wait_queue(&iforce->wait, &wait);
 301
 302                 if (!timeout) {
 303                         iforce->expect_packet = 0;
 304                         return -1;
 305                 }
 306 #else
 307                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = SERIO!\n");
 308 #endif
 309                 break;
 310
 311         default:
 312                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = %d\n",
 313                        iforce->bus);
 314                 break;
 315         }
 316
 317         return -(iforce->edata[0] != packet[0]);
 318 }
 319