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 err("usb_submit_urb failed %d", status);
261 return -1;
262 }
263
264 wait_event_interruptible_timeout(iforce->wait,
265 iforce->ctrl->status != -EINPROGRESS, HZ);
266
267 if (iforce->ctrl->status) {
268 dbg("iforce->ctrl->status = %d", iforce->ctrl->status);
269 usb_unlink_urb(iforce->ctrl);
270 return -1;
271 }
272 #else
273 dbg("iforce_get_id_packet: iforce->bus = USB!");
274 #endif
275 }
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
304
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