1/* 2 * $Id: iforce-packets.c,v 1.1.1.1 2007/08/03 18:52:33 Exp $ 3 * 4 * Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz> 5 * Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.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 32static 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 38void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) 39{ 40 int i; 41 42 printk(KERN_DEBUG __FILE__ ": %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 */ 51int 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 69 if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) { 70 warn("not enough space in xmit buffer to send new packet"); 71 spin_unlock_irqrestore(&iforce->xmit_lock, flags); 72 return -1; 73 } 74 75 empty = head == tail; 76 XMIT_INC(iforce->xmit.head, n+2); 77 78/* 79 * Store packet in xmit buffer 80 */ 81 iforce->xmit.buf[head] = HI(cmd); 82 XMIT_INC(head, 1); 83 iforce->xmit.buf[head] = LO(cmd); 84 XMIT_INC(head, 1); 85 86 c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE); 87 if (n < c) c=n; 88 89 memcpy(&iforce->xmit.buf[head], 90 data, 91 c); 92 if (n != c) { 93 memcpy(&iforce->xmit.buf[0], 94 data + c, 95 n - c); 96 } 97 XMIT_INC(head, n); 98 99 spin_unlock_irqrestore(&iforce->xmit_lock, flags); 100/* 101 * If necessary, start the transmission 102 */ 103 switch (iforce->bus) { 104 105#ifdef CONFIG_JOYSTICK_IFORCE_232 106 case IFORCE_232: 107 if (empty) 108 iforce_serial_xmit(iforce); 109 break; 110#endif 111#ifdef CONFIG_JOYSTICK_IFORCE_USB 112 case IFORCE_USB: 113 114 if (iforce->usbdev && empty && 115 !test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) { 116 117 iforce_usb_xmit(iforce); 118 } 119 break; 120#endif 121 } 122 return 0; 123} 124 125/* Start or stop an effect */ 126int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value) 127{ 128 unsigned char data[3]; 129 130 data[0] = LO(id); 131 data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0; 132 data[2] = LO(value); 133 return iforce_send_packet(iforce, FF_CMD_PLAY, data); 134} 135 136/* Mark an effect that was being updated as ready. That means it can be updated 137 * again */ 138static int mark_core_as_ready(struct iforce *iforce, unsigned short addr) 139{ 140 int i; 141 142 if (!iforce->dev->ff) 143 return 0; 144 145 for (i = 0; i < iforce->dev->ff->max_effects; ++i) { 146 if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) && 147 (iforce->core_effects[i].mod1_chunk.start == addr || 148 iforce->core_effects[i].mod2_chunk.start == addr)) { 149 clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags); 150 return 0; 151 } 152 } 153 warn("unused effect %04x updated !!!", addr); 154 return -1; 155} 156 157void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data) 158{ 159 struct input_dev *dev = iforce->dev; 160 int i; 161 static int being_used = 0; 162 163 if (being_used) 164 warn("re-entrant call to iforce_process %d", being_used); 165 being_used++; 166 167#ifdef CONFIG_JOYSTICK_IFORCE_232 168 if (HI(iforce->expect_packet) == HI(cmd)) { 169 iforce->expect_packet = 0; 170 iforce->ecmd = cmd; 171 memcpy(iforce->edata, data, IFORCE_MAX_LENGTH); 172 } 173#endif 174 wake_up(&iforce->wait); 175 176 if (!iforce->type) { 177 being_used--; 178 return; 179 } 180 181 switch (HI(cmd)) { 182 183 case 0x01: /* joystick position data */ 184 case 0x03: /* wheel position data */ 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_report_key(dev, BTN_DEAD, data[0] & 0x02); 224 input_sync(dev); 225 226 /* Check if an effect was just started or stopped */ 227 i = data[1] & 0x7f; 228 if (data[1] & 0x80) { 229 if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) { 230 /* Report play event */ 231 input_report_ff_status(dev, i, FF_STATUS_PLAYING); 232 } 233 } else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) { 234 /* Report stop event */ 235 input_report_ff_status(dev, i, FF_STATUS_STOPPED); 236 } 237 if (LO(cmd) > 3) { 238 int j; 239 for (j = 3; j < LO(cmd); j += 2) 240 mark_core_as_ready(iforce, data[j] | (data[j+1]<<8)); 241 } 242 break; 243 } 244 being_used--; 245} 246 247int iforce_get_id_packet(struct iforce *iforce, char *packet) 248{ 249 int status; 250 251 switch (iforce->bus) { 252 253 case IFORCE_USB: 254 255#ifdef CONFIG_JOYSTICK_IFORCE_USB 256 iforce->cr.bRequest = packet[0]; 257 iforce->ctrl->dev = iforce->usbdev; 258 259 status = usb_submit_urb(iforce->ctrl, GFP_ATOMIC); 260 if (status) { 261 err("usb_submit_urb failed %d", status); 262 return -1; 263 } 264 265 wait_event_interruptible_timeout(iforce->wait, 266 iforce->ctrl->status != -EINPROGRESS, HZ); 267 268 if (iforce->ctrl->status) { 269 dbg("iforce->ctrl->status = %d", iforce->ctrl->status); 270 usb_unlink_urb(iforce->ctrl); 271 return -1; 272 } 273#else 274 dbg("iforce_get_id_packet: iforce->bus = USB!"); 275#endif 276 break; 277 278 case IFORCE_232: 279 280#ifdef CONFIG_JOYSTICK_IFORCE_232 281 iforce->expect_packet = FF_CMD_QUERY; 282 iforce_send_packet(iforce, FF_CMD_QUERY, packet); 283 284 wait_event_interruptible_timeout(iforce->wait, 285 !iforce->expect_packet, HZ); 286 287 if (iforce->expect_packet) { 288 iforce->expect_packet = 0; 289 return -1; 290 } 291#else 292 err("iforce_get_id_packet: iforce->bus = SERIO!"); 293#endif 294 break; 295 296 default: 297 err("iforce_get_id_packet: iforce->bus = %d", iforce->bus); 298 break; 299 } 300 301 return -(iforce->edata[0] != packet[0]); 302} 303