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 wake_up(&iforce->wait); 171 } 172 #endif 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 != -EINPROGRESS) { 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 } 302 303