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 <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/input.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/spinlock.h>
34 #include <linux/usb.h>
35 #include <linux/serio.h>
36 #include <linux/circ_buf.h>
37 #include <linux/mutex.h>
38
39 /* This module provides arbitrary resource management routines.
40 * I use it to manage the device's memory.
41 * Despite the name of this module, I am *not* going to access the ioports.
42 */
43 #include <linux/ioport.h>
44
45
46 #define IFORCE_MAX_LENGTH 16
47
48 /* iforce::bus */
49 #define IFORCE_232 1
50 #define IFORCE_USB 2
51
52 #define IFORCE_EFFECTS_MAX 32
53
54 /* Each force feedback effect is made of one core effect, which can be
55 * associated to at most to effect modifiers
56 */
57 #define FF_MOD1_IS_USED 0
58 #define FF_MOD2_IS_USED 1
59 #define FF_CORE_IS_USED 2
60 #define FF_CORE_IS_PLAYED 3 /* Effect is currently being played */
61 #define FF_CORE_SHOULD_PLAY 4 /* User wants the effect to be played */
62 #define FF_CORE_UPDATE 5 /* Effect is being updated */
63 #define FF_MODCORE_CNT 6
64
65 struct iforce_core_effect {
66 /* Information about where modifiers are stored in the device's memory */
67 struct resource mod1_chunk;
68 struct resource mod2_chunk;
69 unsigned long flags[BITS_TO_LONGS(FF_MODCORE_CNT)];
70 };
71
72 #define FF_CMD_EFFECT 0x010e
73 #define FF_CMD_ENVELOPE 0x0208
74 #define FF_CMD_MAGNITUDE 0x0303
75 #define FF_CMD_PERIOD 0x0407
76 #define FF_CMD_CONDITION 0x050a
77
78 #define FF_CMD_AUTOCENTER 0x4002
79 #define FF_CMD_PLAY 0x4103
80 #define FF_CMD_ENABLE 0x4201
81 #define FF_CMD_GAIN 0x4301
82
83 #define FF_CMD_QUERY 0xff01
84
85 /* Buffer for async write */
86 #define XMIT_SIZE 256
87 #define XMIT_INC(var, n) (var)+=n; (var)&= XMIT_SIZE -1
88 /* iforce::xmit_flags */
89 #define IFORCE_XMIT_RUNNING 0
90 #define IFORCE_XMIT_AGAIN 1
91
92 struct iforce_device {
93 u16 idvendor;
94 u16 idproduct;
95 char *name;
96 signed short *btn;
97 signed short *abs;
98 signed short *ff;
99 };
100
101 struct iforce {
102 struct input_dev *dev; /* Input device interface */
103 struct iforce_device *type;
104 int bus;
105
106 unsigned char data[IFORCE_MAX_LENGTH];
107 unsigned char edata[IFORCE_MAX_LENGTH];
108 u16 ecmd;
109 u16 expect_packet;
110
111 #ifdef CONFIG_JOYSTICK_IFORCE_232
112 struct serio *serio; /* RS232 transfer */
113 int idx, pkt, len, id;
114 unsigned char csum;
115 #endif
116 #ifdef CONFIG_JOYSTICK_IFORCE_USB
117 struct usb_device *usbdev; /* USB transfer */
118 struct urb *irq, *out, *ctrl;
119 struct usb_ctrlrequest cr;
120 #endif
121 spinlock_t xmit_lock;
122 /* Buffer used for asynchronous sending of bytes to the device */
123 struct circ_buf xmit;
124 unsigned char xmit_data[XMIT_SIZE];
125 unsigned long xmit_flags[1];
126
127 /* Force Feedback */
128 wait_queue_head_t wait;
129 struct resource device_memory;
130 struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX];
131 struct mutex mem_mutex;
132 };
133
134 /* Get hi and low bytes of a 16-bits int */
135 #define HI(a) ((unsigned char)((a) >> 8))
136 #define LO(a) ((unsigned char)((a) & 0xff))
137
138 /* For many parameters, it seems that 0x80 is a special value that should
139 * be avoided. Instead, we replace this value by 0x7f
140 */
141 #define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8))
142
143 /* Encode a time value */
144 #define TIME_SCALE(a) (a)
145
146
147 /* Public functions */
148 /* iforce-serio.c */
149 void iforce_serial_xmit(struct iforce *iforce);
150
151 /* iforce-usb.c */
152 void iforce_usb_xmit(struct iforce *iforce);
153 void iforce_usb_delete(struct iforce *iforce);
154
155 /* iforce-main.c */
156 int iforce_init_device(struct iforce *iforce);
157 void iforce_delete_device(struct iforce *iforce);
158
159 /* iforce-packets.c */
160 int iforce_control_playback(struct iforce*, u16 id, unsigned int);
161 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data);
162 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
163 void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ;
164 int iforce_get_id_packet(struct iforce *iforce, char *packet);
165
166 /* iforce-ff.c */
167 int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *);
168 int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *);
169 int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *);
170
171 /* Public variables */
172 extern struct serio_driver iforce_serio_drv;
173 extern struct usb_driver iforce_usb_driver;
174
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