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
24 #include "iforce.h"
25
26 static struct {
27 __s32 x;
28 __s32 y;
29 } iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
30
31
iforce_dump_packet(struct iforce * iforce,char * msg,u16 cmd,unsigned char * data)32 void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data)
33 {
34 dev_dbg(iforce->dev->dev.parent, "%s %s cmd = %04x, data = %*ph\n",
35 __func__, msg, cmd, LO(cmd), data);
36 }
37
38 /*
39 * Send a packet of bytes to the device
40 */
iforce_send_packet(struct iforce * iforce,u16 cmd,unsigned char * data)41 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
42 {
43 /* Copy data to buffer */
44 int n = LO(cmd);
45 int c;
46 int empty;
47 int head, tail;
48 unsigned long flags;
49
50 /*
51 * Update head and tail of xmit buffer
52 */
53 spin_lock_irqsave(&iforce->xmit_lock, flags);
54
55 head = iforce->xmit.head;
56 tail = iforce->xmit.tail;
57
58
59 if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
60 dev_warn(&iforce->dev->dev,
61 "not enough space in xmit buffer to send new packet\n");
62 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
63 return -1;
64 }
65
66 empty = head == tail;
67 XMIT_INC(iforce->xmit.head, n+2);
68
69 /*
70 * Store packet in xmit buffer
71 */
72 iforce->xmit.buf[head] = HI(cmd);
73 XMIT_INC(head, 1);
74 iforce->xmit.buf[head] = LO(cmd);
75 XMIT_INC(head, 1);
76
77 c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
78 if (n < c) c=n;
79
80 memcpy(&iforce->xmit.buf[head],
81 data,
82 c);
83 if (n != c) {
84 memcpy(&iforce->xmit.buf[0],
85 data + c,
86 n - c);
87 }
88 XMIT_INC(head, n);
89
90 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
91 /*
92 * If necessary, start the transmission
93 */
94 switch (iforce->bus) {
95
96 #ifdef CONFIG_JOYSTICK_IFORCE_232
97 case IFORCE_232:
98 if (empty)
99 iforce_serial_xmit(iforce);
100 break;
101 #endif
102 #ifdef CONFIG_JOYSTICK_IFORCE_USB
103 case IFORCE_USB:
104
105 if (iforce->usbdev && empty &&
106 !test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
107
108 iforce_usb_xmit(iforce);
109 }
110 break;
111 #endif
112 }
113 return 0;
114 }
115
116 /* Start or stop an effect */
iforce_control_playback(struct iforce * iforce,u16 id,unsigned int value)117 int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
118 {
119 unsigned char data[3];
120
121 data[0] = LO(id);
122 data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
123 data[2] = LO(value);
124 return iforce_send_packet(iforce, FF_CMD_PLAY, data);
125 }
126
127 /* Mark an effect that was being updated as ready. That means it can be updated
128 * again */
mark_core_as_ready(struct iforce * iforce,unsigned short addr)129 static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
130 {
131 int i;
132
133 if (!iforce->dev->ff)
134 return 0;
135
136 for (i = 0; i < iforce->dev->ff->max_effects; ++i) {
137 if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
138 (iforce->core_effects[i].mod1_chunk.start == addr ||
139 iforce->core_effects[i].mod2_chunk.start == addr)) {
140 clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
141 return 0;
142 }
143 }
144 dev_warn(&iforce->dev->dev, "unused effect %04x updated !!!\n", addr);
145 return -1;
146 }
147
iforce_process_packet(struct iforce * iforce,u16 cmd,unsigned char * data)148 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data)
149 {
150 struct input_dev *dev = iforce->dev;
151 int i;
152 static int being_used = 0;
153
154 if (being_used)
155 dev_warn(&iforce->dev->dev,
156 "re-entrant call to iforce_process %d\n", being_used);
157 being_used++;
158
159 #ifdef CONFIG_JOYSTICK_IFORCE_232
160 if (HI(iforce->expect_packet) == HI(cmd)) {
161 iforce->expect_packet = 0;
162 iforce->ecmd = cmd;
163 memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
164 }
165 #endif
166 wake_up(&iforce->wait);
167
168 if (!iforce->type) {
169 being_used--;
170 return;
171 }
172
173 switch (HI(cmd)) {
174
175 case 0x01: /* joystick position data */
176 case 0x03: /* wheel position data */
177 if (HI(cmd) == 1) {
178 input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
179 input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
180 input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
181 if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
182 input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
183 } else {
184 input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
185 input_report_abs(dev, ABS_GAS, 255 - data[2]);
186 input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
187 }
188
189 input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
190 input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
191
192 for (i = 0; iforce->type->btn[i] >= 0; i++)
193 input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
194
195 /* If there are untouched bits left, interpret them as the second hat */
196 if (i <= 8) {
197 int btns = data[6];
198 if (test_bit(ABS_HAT1X, dev->absbit)) {
199 if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
200 else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
201 else input_report_abs(dev, ABS_HAT1X, 0);
202 }
203 if (test_bit(ABS_HAT1Y, dev->absbit)) {
204 if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
205 else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
206 else input_report_abs(dev, ABS_HAT1Y, 0);
207 }
208 }
209
210 input_sync(dev);
211
212 break;
213
214 case 0x02: /* status report */
215 input_report_key(dev, BTN_DEAD, data[0] & 0x02);
216 input_sync(dev);
217
218 /* Check if an effect was just started or stopped */
219 i = data[1] & 0x7f;
220 if (data[1] & 0x80) {
221 if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
222 /* Report play event */
223 input_report_ff_status(dev, i, FF_STATUS_PLAYING);
224 }
225 } else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
226 /* Report stop event */
227 input_report_ff_status(dev, i, FF_STATUS_STOPPED);
228 }
229 if (LO(cmd) > 3) {
230 int j;
231 for (j = 3; j < LO(cmd); j += 2)
232 mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
233 }
234 break;
235 }
236 being_used--;
237 }
238
iforce_get_id_packet(struct iforce * iforce,char * packet)239 int iforce_get_id_packet(struct iforce *iforce, char *packet)
240 {
241 switch (iforce->bus) {
242
243 case IFORCE_USB: {
244 #ifdef CONFIG_JOYSTICK_IFORCE_USB
245 int status;
246
247 iforce->cr.bRequest = packet[0];
248 iforce->ctrl->dev = iforce->usbdev;
249
250 status = usb_submit_urb(iforce->ctrl, GFP_KERNEL);
251 if (status) {
252 dev_err(&iforce->intf->dev,
253 "usb_submit_urb failed %d\n", status);
254 return -1;
255 }
256
257 wait_event_interruptible_timeout(iforce->wait,
258 iforce->ctrl->status != -EINPROGRESS, HZ);
259
260 if (iforce->ctrl->status) {
261 dev_dbg(&iforce->intf->dev,
262 "iforce->ctrl->status = %d\n",
263 iforce->ctrl->status);
264 usb_unlink_urb(iforce->ctrl);
265 return -1;
266 }
267 #else
268 printk(KERN_DEBUG "iforce_get_id_packet: iforce->bus = USB!\n");
269 #endif
270 }
271 break;
272
273 case IFORCE_232:
274
275 #ifdef CONFIG_JOYSTICK_IFORCE_232
276 iforce->expect_packet = FF_CMD_QUERY;
277 iforce_send_packet(iforce, FF_CMD_QUERY, packet);
278
279 wait_event_interruptible_timeout(iforce->wait,
280 !iforce->expect_packet, HZ);
281
282 if (iforce->expect_packet) {
283 iforce->expect_packet = 0;
284 return -1;
285 }
286 #else
287 dev_err(&iforce->dev->dev,
288 "iforce_get_id_packet: iforce->bus = SERIO!\n");
289 #endif
290 break;
291
292 default:
293 dev_err(&iforce->dev->dev,
294 "iforce_get_id_packet: iforce->bus = %d\n",
295 iforce->bus);
296 break;
297 }
298
299 return -(iforce->edata[0] != packet[0]);
300 }
301
302
