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 dev_warn(&iforce->dev->dev, 69 "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 data[0] = LO(id); 130 data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0; 131 data[2] = LO(value); 132 return iforce_send_packet(iforce, FF_CMD_PLAY, data); 133 } 134 135 /* Mark an effect that was being updated as ready. That means it can be updated 136 * again */ 137 static int mark_core_as_ready(struct iforce *iforce, unsigned short addr) 138 { 139 int i; 140 141 if (!iforce->dev->ff) 142 return 0; 143 144 for (i = 0; i < iforce->dev->ff->max_effects; ++i) { 145 if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) && 146 (iforce->core_effects[i].mod1_chunk.start == addr || 147 iforce->core_effects[i].mod2_chunk.start == addr)) { 148 clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags); 149 return 0; 150 } 151 } 152 dev_warn(&iforce->dev->dev, "unused effect %04x updated !!!\n", addr); 153 return -1; 154 } 155 156 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data) 157 { 158 struct input_dev *dev = iforce->dev; 159 int i; 160 static int being_used = 0; 161 162 if (being_used) 163 dev_warn(&iforce->dev->dev, 164 "re-entrant call to iforce_process %d\n", 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 } 246 247 int iforce_get_id_packet(struct iforce *iforce, char *packet) 248 { 249 switch (iforce->bus) { 250 251 case IFORCE_USB: { 252 #ifdef CONFIG_JOYSTICK_IFORCE_USB 253 int status; 254 255 iforce->cr.bRequest = packet[0]; 256 iforce->ctrl->dev = iforce->usbdev; 257 258 status = usb_submit_urb(iforce->ctrl, GFP_ATOMIC); 259 if (status) { 260 dev_err(&iforce->intf->dev, 261 "usb_submit_urb failed %d\n", 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 dev_dbg(&iforce->intf->dev, 270 "iforce->ctrl->status = %d\n", 271 iforce->ctrl->status); 272 usb_unlink_urb(iforce->ctrl); 273 return -1; 274 } 275 #else 276 printk(KERN_DEBUG "iforce_get_id_packet: iforce->bus = USB!\n"); 277 #endif 278 } 279 break; 280 281 case IFORCE_232: 282 283 #ifdef CONFIG_JOYSTICK_IFORCE_232 284 iforce->expect_packet = FF_CMD_QUERY; 285 iforce_send_packet(iforce, FF_CMD_QUERY, packet); 286 287 wait_event_interruptible_timeout(iforce->wait, 288 !iforce->expect_packet, HZ); 289 290 if (iforce->expect_packet) { 291 iforce->expect_packet = 0; 292 return -1; 293 } 294 #else 295 dev_err(&iforce->dev->dev, 296 "iforce_get_id_packet: iforce->bus = SERIO!\n"); 297 #endif 298 break; 299 300 default: 301 dev_err(&iforce->dev->dev, 302 "iforce_get_id_packet: iforce->bus = %d\n", 303 iforce->bus); 304 break; 305 } 306 307 return -(iforce->edata[0] != packet[0]); 308 } 309 310