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
26 static void iforce_serio_xmit(struct iforce *iforce)
32 if (test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
33 set_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags);
37 spin_lock_irqsave(&iforce->xmit_lock, flags);
40 if (iforce->xmit.head == iforce->xmit.tail) {
41 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
42 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
48 serio_write(iforce->serio, 0x2b);
50 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
51 cs ^= iforce->xmit.buf[iforce->xmit.tail];
52 XMIT_INC(iforce->xmit.tail, 1);
54 for (i=iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
55 serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
56 cs ^= iforce->xmit.buf[iforce->xmit.tail];
57 XMIT_INC(iforce->xmit.tail, 1);
60 serio_write(iforce->serio, cs);
62 if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
65 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
67 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
70 static int iforce_serio_get_id(struct iforce *iforce, u8 *packet)
72 iforce->expect_packet = FF_CMD_QUERY;
73 iforce_send_packet(iforce, FF_CMD_QUERY, packet);
75 wait_event_interruptible_timeout(iforce->wait,
76 !iforce->expect_packet, HZ);
78 if (iforce->expect_packet) {
79 iforce->expect_packet = 0;
83 return -(iforce->edata[0] != packet[0]);
86 static int iforce_serio_start_io(struct iforce *iforce)
88 /* No special handling required */
92 static void iforce_serio_stop_io(struct iforce *iforce)
94 //TODO: Wait for the last packets to be sent
97 static const struct iforce_xport_ops iforce_serio_xport_ops = {
98 .xmit = iforce_serio_xmit,
99 .get_id = iforce_serio_get_id,
100 .start_io = iforce_serio_start_io,
101 .stop_io = iforce_serio_stop_io,
104 static void iforce_serio_write_wakeup(struct serio *serio)
106 struct iforce *iforce = serio_get_drvdata(serio);
108 iforce_serio_xmit(iforce);
111 static irqreturn_t iforce_serio_irq(struct serio *serio,
112 unsigned char data, unsigned int flags)
114 struct iforce *iforce = serio_get_drvdata(serio);
123 if (data > 3 && data != 0xff)
131 if (data > IFORCE_MAX_LENGTH) {
140 if (iforce->idx < iforce->len) {
141 iforce->csum += iforce->data[iforce->idx++] = data;
145 if (iforce->idx == iforce->len) {
146 u16 cmd = (iforce->id << 8) | iforce->idx;
148 /* Handle command completion */
149 if (HI(iforce->expect_packet) == HI(cmd)) {
150 iforce->expect_packet = 0;
152 memcpy(iforce->edata, iforce->data, IFORCE_MAX_LENGTH);
155 iforce_process_packet(iforce, cmd, iforce->data);
167 static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
169 struct iforce *iforce;
172 iforce = kzalloc(sizeof(struct iforce), GFP_KERNEL);
176 iforce->xport_ops = &iforce_serio_xport_ops;
177 iforce->bus = IFORCE_232;
178 iforce->serio = serio;
180 serio_set_drvdata(serio, iforce);
182 err = serio_open(serio, drv);
186 err = iforce_init_device(&serio->dev, BUS_RS232, iforce);
192 fail2: serio_close(serio);
193 fail1: serio_set_drvdata(serio, NULL);
198 static void iforce_serio_disconnect(struct serio *serio)
200 struct iforce *iforce = serio_get_drvdata(serio);
202 input_unregister_device(iforce->dev);
204 serio_set_drvdata(serio, NULL);
208 static const struct serio_device_id iforce_serio_ids[] = {
211 .proto = SERIO_IFORCE,
218 MODULE_DEVICE_TABLE(serio, iforce_serio_ids);
220 struct serio_driver iforce_serio_drv = {
224 .description = "RS232 I-Force joysticks and wheels driver",
225 .id_table = iforce_serio_ids,
226 .write_wakeup = iforce_serio_write_wakeup,
227 .interrupt = iforce_serio_irq,
228 .connect = iforce_serio_connect,
229 .disconnect = iforce_serio_disconnect,