1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
/*
* Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
* Creative Audio MIDI, for the CA0106 Driver
* Version: 0.0.1
*
* Changelog:
* Implementation is based on mpu401 and emu10k1x and
* tested with ca0106.
* mpu401: Copyright (c) by Jaroslav Kysela <perex@suse.cz>
* emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
*/
#include <linux/spinlock.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/rawmidi.h>
#include "ca_midi.h"
#define ca_midi_write_data(midi, data) midi->write(midi, data, 0)
#define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1)
#define ca_midi_read_data(midi) midi->read(midi, 0)
#define ca_midi_read_stat(midi) midi->read(midi, 1)
#define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail))
#define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready))
static void ca_midi_clear_rx(ca_midi_t *midi)
{
int timeout = 100000;
for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
ca_midi_read_data(midi);
#ifdef CONFIG_SND_DEBUG
if (timeout <= 0)
snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n", ca_midi_read_stat(midi));
#endif
}
static void ca_midi_interrupt(ca_midi_t *midi, unsigned int status) {
unsigned char byte;
if (midi->rmidi == NULL) {
midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
return;
}
spin_lock(&midi->input_lock);
if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
ca_midi_clear_rx(midi);
} else {
byte = ca_midi_read_data(midi);
if(midi->substream_input)
snd_rawmidi_receive(midi->substream_input, &byte, 1);
}
}
spin_unlock(&midi->input_lock);
spin_lock(&midi->output_lock);
if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
if (midi->substream_output &&
snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
ca_midi_write_data(midi, byte);
} else {
midi->interrupt_disable(midi,midi->tx_enable);
}
}
spin_unlock(&midi->output_lock);
}
static void ca_midi_cmd(ca_midi_t *midi, unsigned char cmd, int ack)
{
unsigned long flags;
int timeout, ok;
spin_lock_irqsave(&midi->input_lock, flags);
ca_midi_write_data(midi, 0x00);
/* ca_midi_clear_rx(midi); */
ca_midi_write_cmd(midi, cmd);
if (ack) {
ok = 0;
timeout = 10000;
while (!ok && timeout-- > 0) {
if (ca_midi_input_avail(midi)) {
if (ca_midi_read_data(midi) == midi->ack)
ok = 1;
}
}
if (!ok && ca_midi_read_data(midi) == midi->ack)
ok = 1;
} else {
ok = 1;
}
spin_unlock_irqrestore(&midi->input_lock, flags);
if (!ok)
snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
cmd,
midi->get_dev_id_port(midi->dev_id),
ca_midi_read_stat(midi),
ca_midi_read_data(midi));
}
static int ca_midi_input_open(snd_rawmidi_substream_t * substream)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
unsigned long flags;
snd_assert(midi->dev_id, return -ENXIO);
spin_lock_irqsave(&midi->open_lock, flags);
midi->midi_mode |= CA_MIDI_MODE_INPUT;
midi->substream_input = substream;
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 1);
ca_midi_cmd(midi, midi->enter_uart, 1);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_output_open(snd_rawmidi_substream_t * substream)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
unsigned long flags;
snd_assert(midi->dev_id, return -ENXIO);
spin_lock_irqsave(&midi->open_lock, flags);
midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
midi->substream_output = substream;
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 1);
ca_midi_cmd(midi, midi->enter_uart, 1);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_input_close(snd_rawmidi_substream_t * substream)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
unsigned long flags;
snd_assert(midi->dev_id, return -ENXIO);
spin_lock_irqsave(&midi->open_lock, flags);
midi->interrupt_disable(midi,midi->rx_enable);
midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
midi->substream_input = NULL;
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 0);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static int ca_midi_output_close(snd_rawmidi_substream_t * substream)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
unsigned long flags;
snd_assert(midi->dev_id, return -ENXIO);
spin_lock_irqsave(&midi->open_lock, flags);
midi->interrupt_disable(midi,midi->tx_enable);
midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
midi->substream_output = NULL;
if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
spin_unlock_irqrestore(&midi->open_lock, flags);
ca_midi_cmd(midi, midi->reset, 0);
} else {
spin_unlock_irqrestore(&midi->open_lock, flags);
}
return 0;
}
static void ca_midi_input_trigger(snd_rawmidi_substream_t * substream, int up)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
snd_assert(midi->dev_id, return);
if (up) {
midi->interrupt_enable(midi,midi->rx_enable);
} else {
midi->interrupt_disable(midi, midi->rx_enable);
}
}
static void ca_midi_output_trigger(snd_rawmidi_substream_t * substream, int up)
{
ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data;
unsigned long flags;
snd_assert(midi->dev_id, return);
if (up) {
int max = 4;
unsigned char byte;
spin_lock_irqsave(&midi->output_lock, flags);
/* try to send some amount of bytes here before interrupts */
while (max > 0) {
if (ca_midi_output_ready(midi)) {
if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
snd_rawmidi_transmit(substream, &byte, 1) != 1) {
/* no more data */
spin_unlock_irqrestore(&midi->output_lock, flags);
return;
}
ca_midi_write_data(midi, byte);
max--;
} else {
break;
}
}
spin_unlock_irqrestore(&midi->output_lock, flags);
midi->interrupt_enable(midi,midi->tx_enable);
} else {
midi->interrupt_disable(midi,midi->tx_enable);
}
}
static snd_rawmidi_ops_t ca_midi_output =
{
.open = ca_midi_output_open,
.close = ca_midi_output_close,
.trigger = ca_midi_output_trigger,
};
static snd_rawmidi_ops_t ca_midi_input =
{
.open = ca_midi_input_open,
.close = ca_midi_input_close,
.trigger = ca_midi_input_trigger,
};
static void ca_midi_free(ca_midi_t *midi) {
midi->interrupt = NULL;
midi->interrupt_enable = NULL;
midi->interrupt_disable = NULL;
midi->read = NULL;
midi->write = NULL;
midi->get_dev_id_card = NULL;
midi->get_dev_id_port = NULL;
midi->rmidi = NULL;
}
static void ca_rmidi_free(snd_rawmidi_t *rmidi)
{
ca_midi_free((ca_midi_t *)rmidi->private_data);
}
int __devinit ca_midi_init(void *dev_id, ca_midi_t *midi, int device, char *name)
{
snd_rawmidi_t *rmidi;
int err;
if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
return err;
midi->dev_id = dev_id;
midi->interrupt = ca_midi_interrupt;
spin_lock_init(&midi->open_lock);
spin_lock_init(&midi->input_lock);
spin_lock_init(&midi->output_lock);
strcpy(rmidi->name, name);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
rmidi->private_data = midi;
rmidi->private_free = ca_rmidi_free;
midi->rmidi = rmidi;
return 0;
}
|
