2 * Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz>
3 * Copyright (c) 2001, 2007 Johann Deneux <johann.deneux@gmail.com>
5 * USB/RS232 I-Force joysticks and wheels.
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.
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.
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
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
30 void iforce_serial_xmit(struct iforce *iforce)
36 if (test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
37 set_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags);
41 spin_lock_irqsave(&iforce->xmit_lock, flags);
44 if (iforce->xmit.head == iforce->xmit.tail) {
45 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
46 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
52 serio_write(iforce->serio, 0x2b);
54 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
55 cs ^= iforce->xmit.buf[iforce->xmit.tail];
56 XMIT_INC(iforce->xmit.tail, 1);
58 for (i=iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
59 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
60 cs ^= iforce->xmit.buf[iforce->xmit.tail];
61 XMIT_INC(iforce->xmit.tail, 1);
64 serio_write(iforce->serio, cs);
66 if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
69 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
71 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
74 static void iforce_serio_write_wakeup(struct serio *serio)
76 struct iforce *iforce = serio_get_drvdata(serio);
78 iforce_serial_xmit(iforce);
81 static irqreturn_t iforce_serio_irq(struct serio *serio,
82 unsigned char data, unsigned int flags)
84 struct iforce *iforce = serio_get_drvdata(serio);
93 if (data > 3 && data != 0xff)
101 if (data > IFORCE_MAX_LENGTH) {
110 if (iforce->idx < iforce->len) {
111 iforce->csum += iforce->data[iforce->idx++] = data;
115 if (iforce->idx == iforce->len) {
116 iforce_process_packet(iforce, (iforce->id << 8) | iforce->idx, iforce->data);
127 static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
129 struct iforce *iforce;
132 iforce = kzalloc(sizeof(struct iforce), GFP_KERNEL);
136 iforce->bus = IFORCE_232;
137 iforce->serio = serio;
139 serio_set_drvdata(serio, iforce);
141 err = serio_open(serio, drv);
145 err = iforce_init_device(iforce);
151 fail2: serio_close(serio);
152 fail1: serio_set_drvdata(serio, NULL);
157 static void iforce_serio_disconnect(struct serio *serio)
159 struct iforce *iforce = serio_get_drvdata(serio);
161 input_unregister_device(iforce->dev);
163 serio_set_drvdata(serio, NULL);
167 static struct serio_device_id iforce_serio_ids[] = {
170 .proto = SERIO_IFORCE,
177 MODULE_DEVICE_TABLE(serio, iforce_serio_ids);
179 struct serio_driver iforce_serio_drv = {
183 .description = "RS232 I-Force joysticks and wheels driver",
184 .id_table = iforce_serio_ids,
185 .write_wakeup = iforce_serio_write_wakeup,
186 .interrupt = iforce_serio_irq,
187 .connect = iforce_serio_connect,
188 .disconnect = iforce_serio_disconnect,