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 } 301 302