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
 143         for (i = 0; i < iforce->dev->ff_effects_max; ++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         printk(KERN_WARNING "iforce-packets.c: unused effect %04x updated !!!\n", addr);
 152         return -1;
 153 }
 154
 155 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data, struct pt_regs *regs)
 156 {
 157         struct input_dev *dev = iforce->dev;
 158         int i;
 159         static int being_used = 0;
 160
 161         if (being_used)
 162                 printk(KERN_WARNING "iforce-packets.c: re-entrant call to iforce_process %d\n", 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
 184                         input_regs(dev, regs);
 185
 186                         if (HI(cmd) == 1) {
 187                                 input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
 188                                 input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
 189                                 input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
 190                                 if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
 191                                         input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
 192                         } else {
 193                                 input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
 194                                 input_report_abs(dev, ABS_GAS,   255 - data[2]);
 195                                 input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
 196                         }
 197
 198                         input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
 199                         input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
 200
 201                         for (i = 0; iforce->type->btn[i] >= 0; i++)
 202                                 input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
 203
 204                         /* If there are untouched bits left, interpret them as the second hat */
 205                         if (i <= 8) {
 206                                 int btns = data[6];
 207                                 if (test_bit(ABS_HAT1X, dev->absbit)) {
 208                                         if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
 209                                         else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
 210                                         else input_report_abs(dev, ABS_HAT1X, 0);
 211                                 }
 212                                 if (test_bit(ABS_HAT1Y, dev->absbit)) {
 213                                         if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
 214                                         else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
 215                                         else input_report_abs(dev, ABS_HAT1Y, 0);
 216                                 }
 217                         }
 218
 219                         input_sync(dev);
 220
 221                         break;
 222
 223                 case 0x02:      /* status report */
 224                         input_regs(dev, regs);
 225                         input_report_key(dev, BTN_DEAD, data[0] & 0x02);
 226                         input_sync(dev);
 227
 228                         /* Check if an effect was just started or stopped */
 229                         i = data[1] & 0x7f;
 230                         if (data[1] & 0x80) {
 231                                 if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 232                                 /* Report play event */
 233                                 input_report_ff_status(dev, i, FF_STATUS_PLAYING);
 234                                 }
 235                         }
 236                         else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 237                                 /* Report stop event */
 238                                 input_report_ff_status(dev, i, FF_STATUS_STOPPED);
 239                         }
 240                         if (LO(cmd) > 3) {
 241                                 int j;
 242                                 for (j=3; j<LO(cmd); j+=2) {
 243                                         mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
 244                                 }
 245                         }
 246                         break;
 247         }
 248         being_used--;
 249 }
 250
 251 int iforce_get_id_packet(struct iforce *iforce, char *packet)
 252 {
 253         switch (iforce->bus) {
 254
 255         case IFORCE_USB:
 256
 257 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 258                 iforce->cr.bRequest = packet[0];
 259                 iforce->ctrl->dev = iforce->usbdev;
 260
 261                 if (usb_submit_urb(iforce->ctrl, GFP_ATOMIC))
 262                         return -1;
 263
 264                 wait_event_interruptible_timeout(iforce->wait,
 265                         iforce->ctrl->status != -EINPROGRESS, HZ);
 266
 267                 if (iforce->ctrl->status) {
 268                         usb_unlink_urb(iforce->ctrl);
 269                         return -1;
 270                 }
 271 #else
 272                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = USB!\n");
 273 #endif
 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                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = SERIO!\n");
 291 #endif
 292                 break;
 293
 294         default:
 295                 printk(KERN_ERR "iforce_get_id_packet: iforce->bus = %d\n",
 296                        iforce->bus);
 297                 break;
 298         }
 299
 300         return -(iforce->edata[0] != packet[0]);
 301 }
 302