2 * $Id: iforce-serio.c,v 1.4 2002/01/28 22:45:00 jdeneux Exp $
4 * Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz>
5 * Copyright (c) 2001, 2007 Johann Deneux <johann.deneux@gmail.com>
7 * USB/RS232 I-Force joysticks and wheels.
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.
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.
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
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
32 void iforce_serial_xmit(struct iforce *iforce)
38 if (test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
39 set_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags);
43 spin_lock_irqsave(&iforce->xmit_lock, flags);
46 if (iforce->xmit.head == iforce->xmit.tail) {
47 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
48 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
54 serio_write(iforce->serio, 0x2b);
56 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
57 cs ^= iforce->xmit.buf[iforce->xmit.tail];
58 XMIT_INC(iforce->xmit.tail, 1);
60 for (i=iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
61 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
62 cs ^= iforce->xmit.buf[iforce->xmit.tail];
63 XMIT_INC(iforce->xmit.tail, 1);
66 serio_write(iforce->serio, cs);
68 if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
71 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
73 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
76 static void iforce_serio_write_wakeup(struct serio *serio)
78 struct iforce *iforce = serio_get_drvdata(serio);
80 iforce_serial_xmit(iforce);
83 static irqreturn_t iforce_serio_irq(struct serio *serio,
84 unsigned char data, unsigned int flags)
86 struct iforce *iforce = serio_get_drvdata(serio);
95 if (data > 3 && data != 0xff)
103 if (data > IFORCE_MAX_LENGTH) {
112 if (iforce->idx < iforce->len) {
113 iforce->csum += iforce->data[iforce->idx++] = data;
117 if (iforce->idx == iforce->len) {
118 iforce_process_packet(iforce, (iforce->id << 8) | iforce->idx, iforce->data);
129 static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
131 struct iforce *iforce;
134 iforce = kzalloc(sizeof(struct iforce), GFP_KERNEL);
138 iforce->bus = IFORCE_232;
139 iforce->serio = serio;
141 serio_set_drvdata(serio, iforce);
143 err = serio_open(serio, drv);
147 err = iforce_init_device(iforce);
153 fail2: serio_close(serio);
154 fail1: serio_set_drvdata(serio, NULL);
159 static void iforce_serio_disconnect(struct serio *serio)
161 struct iforce *iforce = serio_get_drvdata(serio);
163 input_unregister_device(iforce->dev);
165 serio_set_drvdata(serio, NULL);
169 static struct serio_device_id iforce_serio_ids[] = {
172 .proto = SERIO_IFORCE,
179 MODULE_DEVICE_TABLE(serio, iforce_serio_ids);
181 struct serio_driver iforce_serio_drv = {
185 .description = "RS232 I-Force joysticks and wheels driver",
186 .id_table = iforce_serio_ids,
187 .write_wakeup = iforce_serio_write_wakeup,
188 .interrupt = iforce_serio_irq,
189 .connect = iforce_serio_connect,
190 .disconnect = iforce_serio_disconnect,