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

   1 /*
   2  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   3  *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
   4  *
   5  *  USB/RS232 I-Force joysticks and wheels.
   6  */
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  * Should you need to contact me, the author, you can do so either by
  24  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  25  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  26  */
  27
  28 #include "iforce.h"
  29
  30 static struct {
  31         __s32 x;
  32         __s32 y;
  33 } iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  34
  35
  36 void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data)
  37 {
  38         int i;
  39
  40         printk(KERN_DEBUG __FILE__ ": %s cmd = %04x, data = ", msg, cmd);
  41         for (i = 0; i < LO(cmd); i++)
  42                 printk("%02x ", data[i]);
  43         printk("\n");
  44 }
  45
  46 /*
  47  * Send a packet of bytes to the device
  48  */
  49 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
  50 {
  51         /* Copy data to buffer */
  52         int n = LO(cmd);
  53         int c;
  54         int empty;
  55         int head, tail;
  56         unsigned long flags;
  57
  58 /*
  59  * Update head and tail of xmit buffer
  60  */
  61         spin_lock_irqsave(&iforce->xmit_lock, flags);
  62
  63         head = iforce->xmit.head;
  64         tail = iforce->xmit.tail;
  65
  66
  67         if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
  68                 warn("not enough space in xmit buffer to send new packet");
  69                 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  70                 return -1;
  71         }
  72
  73         empty = head == tail;
  74         XMIT_INC(iforce->xmit.head, n+2);
  75
  76 /*
  77  * Store packet in xmit buffer
  78  */
  79         iforce->xmit.buf[head] = HI(cmd);
  80         XMIT_INC(head, 1);
  81         iforce->xmit.buf[head] = LO(cmd);
  82         XMIT_INC(head, 1);
  83
  84         c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
  85         if (n < c) c=n;
  86
  87         memcpy(&iforce->xmit.buf[head],
  88                data,
  89                c);
  90         if (n != c) {
  91                 memcpy(&iforce->xmit.buf[0],
  92                        data + c,
  93                        n - c);
  94         }
  95         XMIT_INC(head, n);
  96
  97         spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  98 /*
  99  * If necessary, start the transmission
 100  */
 101         switch (iforce->bus) {
 102
 103 #ifdef CONFIG_JOYSTICK_IFORCE_232
 104                 case IFORCE_232:
 105                 if (empty)
 106                         iforce_serial_xmit(iforce);
 107                 break;
 108 #endif
 109 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 110                 case IFORCE_USB:
 111
 112                 if (iforce->usbdev && empty &&
 113                         !test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
 114
 115                         iforce_usb_xmit(iforce);
 116                 }
 117                 break;
 118 #endif
 119         }
 120         return 0;
 121 }
 122
 123 /* Start or stop an effect */
 124 int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
 125 {
 126         unsigned char data[3];
 127
 128         data[0] = LO(id);
 129         data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
 130         data[2] = LO(value);
 131         return iforce_send_packet(iforce, FF_CMD_PLAY, data);
 132 }
 133
 134 /* Mark an effect that was being updated as ready. That means it can be updated
 135  * again */
 136 static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
 137 {
 138         int i;
 139
 140         if (!iforce->dev->ff)
 141                 return 0;
 142
 143         for (i = 0; i < iforce->dev->ff->max_effects; ++i) {
 144                 if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
 145                     (iforce->core_effects[i].mod1_chunk.start == addr ||
 146                      iforce->core_effects[i].mod2_chunk.start == addr)) {
 147                         clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
 148                         return 0;
 149                 }
 150         }
 151         warn("unused effect %04x updated !!!", addr);
 152         return -1;
 153 }
 154
 155 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data)
 156 {
 157         struct input_dev *dev = iforce->dev;
 158         int i;
 159         static int being_used = 0;
 160
 161         if (being_used)
 162                 warn("re-entrant call to iforce_process %d", being_used);
 163         being_used++;
 164
 165 #ifdef CONFIG_JOYSTICK_IFORCE_232
 166         if (HI(iforce->expect_packet) == HI(cmd)) {
 167                 iforce->expect_packet = 0;
 168                 iforce->ecmd = cmd;
 169                 memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
 170         }
 171 #endif
 172         wake_up(&iforce->wait);
 173
 174         if (!iforce->type) {
 175                 being_used--;
 176                 return;
 177         }
 178
 179         switch (HI(cmd)) {
 180
 181                 case 0x01:      /* joystick position data */
 182                 case 0x03:      /* wheel position data */
 183                         if (HI(cmd) == 1) {
 184                                 input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
 185                                 input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
 186                                 input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
 187                                 if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
 188                                         input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
 189                         } else {
 190                                 input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
 191                                 input_report_abs(dev, ABS_GAS,   255 - data[2]);
 192                                 input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
 193                         }
 194
 195                         input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
 196                         input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
 197
 198                         for (i = 0; iforce->type->btn[i] >= 0; i++)
 199                                 input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
 200
 201                         /* If there are untouched bits left, interpret them as the second hat */
 202                         if (i <= 8) {
 203                                 int btns = data[6];
 204                                 if (test_bit(ABS_HAT1X, dev->absbit)) {
 205                                         if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
 206                                         else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
 207                                         else input_report_abs(dev, ABS_HAT1X, 0);
 208                                 }
 209                                 if (test_bit(ABS_HAT1Y, dev->absbit)) {
 210                                         if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
 211                                         else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
 212                                         else input_report_abs(dev, ABS_HAT1Y, 0);
 213                                 }
 214                         }
 215
 216                         input_sync(dev);
 217
 218                         break;
 219
 220                 case 0x02:      /* status report */
 221                         input_report_key(dev, BTN_DEAD, data[0] & 0x02);
 222                         input_sync(dev);
 223
 224                         /* Check if an effect was just started or stopped */
 225                         i = data[1] & 0x7f;
 226                         if (data[1] & 0x80) {
 227                                 if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 228                                         /* Report play event */
 229                                         input_report_ff_status(dev, i, FF_STATUS_PLAYING);
 230                                 }
 231                         } else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 232                                 /* Report stop event */
 233                                 input_report_ff_status(dev, i, FF_STATUS_STOPPED);
 234                         }
 235                         if (LO(cmd) > 3) {
 236                                 int j;
 237                                 for (j = 3; j < LO(cmd); j += 2)
 238                                         mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
 239                         }
 240                         break;
 241         }
 242         being_used--;
 243 }
 244
 245 int iforce_get_id_packet(struct iforce *iforce, char *packet)
 246 {
 247         switch (iforce->bus) {
 248
 249         case IFORCE_USB: {
 250 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 251                 int status;
 252
 253                 iforce->cr.bRequest = packet[0];
 254                 iforce->ctrl->dev = iforce->usbdev;
 255
 256                 status = usb_submit_urb(iforce->ctrl, GFP_ATOMIC);
 257                 if (status) {
 258                         err("usb_submit_urb failed %d", status);
 259                         return -1;
 260                 }
 261
 262                 wait_event_interruptible_timeout(iforce->wait,
 263                         iforce->ctrl->status != -EINPROGRESS, HZ);
 264
 265                 if (iforce->ctrl->status) {
 266                         dbg("iforce->ctrl->status = %d", iforce->ctrl->status);
 267                         usb_unlink_urb(iforce->ctrl);
 268                         return -1;
 269                 }
 270 #else
 271                 dbg("iforce_get_id_packet: iforce->bus = USB!");
 272 #endif
 273                 }
 274                 break;
 275
 276         case IFORCE_232:
 277
 278 #ifdef CONFIG_JOYSTICK_IFORCE_232
 279                 iforce->expect_packet = FF_CMD_QUERY;
 280                 iforce_send_packet(iforce, FF_CMD_QUERY, packet);
 281
 282                 wait_event_interruptible_timeout(iforce->wait,
 283                         !iforce->expect_packet, HZ);
 284
 285                 if (iforce->expect_packet) {
 286                         iforce->expect_packet = 0;
 287                         return -1;
 288                 }
 289 #else
 290                 err("iforce_get_id_packet: iforce->bus = SERIO!");
 291 #endif
 292                 break;
 293
 294         default:
 295                 err("iforce_get_id_packet: iforce->bus = %d", iforce->bus);
 296                 break;
 297         }
 298
 299         return -(iforce->edata[0] != packet[0]);
 300 }
 301