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
|
/*
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
* Routines for the GF1 MIDI interface - like UART 6850
*
*
* 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 <sound/driver.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/gus.h>
static void snd_gf1_interrupt_midi_in(struct snd_gus_card * gus)
{
int count;
unsigned char stat, data, byte;
unsigned long flags;
count = 10;
while (count) {
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
stat = snd_gf1_uart_stat(gus);
if (!(stat & 0x01)) { /* data in Rx FIFO? */
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
count--;
continue;
}
count = 100; /* arm counter to new value */
data = snd_gf1_uart_get(gus);
if (!(gus->gf1.uart_cmd & 0x80)) {
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
continue;
}
if (stat & 0x10) { /* framing error */
gus->gf1.uart_framing++;
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
continue;
}
byte = snd_gf1_uart_get(gus);
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
snd_rawmidi_receive(gus->midi_substream_input, &byte, 1);
if (stat & 0x20) {
gus->gf1.uart_overrun++;
}
}
}
static void snd_gf1_interrupt_midi_out(struct snd_gus_card * gus)
{
char byte;
unsigned long flags;
/* try unlock output */
if (snd_gf1_uart_stat(gus) & 0x01)
snd_gf1_interrupt_midi_in(gus);
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (snd_gf1_uart_stat(gus) & 0x02) { /* Tx FIFO free? */
if (snd_rawmidi_transmit(gus->midi_substream_output, &byte, 1) != 1) { /* no other bytes or error */
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20); /* disable Tx interrupt */
} else {
snd_gf1_uart_put(gus, byte);
}
}
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
}
static void snd_gf1_uart_reset(struct snd_gus_card * gus, int close)
{
snd_gf1_uart_cmd(gus, 0x03); /* reset */
if (!close && gus->uart_enable) {
udelay(160);
snd_gf1_uart_cmd(gus, 0x00); /* normal operations */
}
}
static int snd_gf1_uart_output_open(struct snd_rawmidi_substream *substream)
{
unsigned long flags;
struct snd_gus_card *gus;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (!(gus->gf1.uart_cmd & 0x80)) { /* input active? */
snd_gf1_uart_reset(gus, 0);
}
gus->gf1.interrupt_handler_midi_out = snd_gf1_interrupt_midi_out;
gus->midi_substream_output = substream;
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
#if 0
snd_printk(KERN_DEBUG "write init - cmd = 0x%x, stat = 0x%x\n", gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
#endif
return 0;
}
static int snd_gf1_uart_input_open(struct snd_rawmidi_substream *substream)
{
unsigned long flags;
struct snd_gus_card *gus;
int i;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out) {
snd_gf1_uart_reset(gus, 0);
}
gus->gf1.interrupt_handler_midi_in = snd_gf1_interrupt_midi_in;
gus->midi_substream_input = substream;
if (gus->uart_enable) {
for (i = 0; i < 1000 && (snd_gf1_uart_stat(gus) & 0x01); i++)
snd_gf1_uart_get(gus); /* clean Rx */
if (i >= 1000)
snd_printk(KERN_ERR "gus midi uart init read - cleanup error\n");
}
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
#if 0
snd_printk("read init - enable = %i, cmd = 0x%x, stat = 0x%x\n", gus->uart_enable, gus->gf1.uart_cmd, snd_gf1_uart_stat(gus));
snd_printk("[0x%x] reg (ctrl/status) = 0x%x, reg (data) = 0x%x (page = 0x%x)\n", gus->gf1.port + 0x100, inb(gus->gf1.port + 0x100), inb(gus->gf1.port + 0x101), inb(gus->gf1.port + 0x102));
#endif
return 0;
}
static int snd_gf1_uart_output_close(struct snd_rawmidi_substream *substream)
{
unsigned long flags;
struct snd_gus_card *gus;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (gus->gf1.interrupt_handler_midi_in != snd_gf1_interrupt_midi_in)
snd_gf1_uart_reset(gus, 1);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_OUT);
gus->midi_substream_output = NULL;
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
return 0;
}
static int snd_gf1_uart_input_close(struct snd_rawmidi_substream *substream)
{
unsigned long flags;
struct snd_gus_card *gus;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (gus->gf1.interrupt_handler_midi_out != snd_gf1_interrupt_midi_out)
snd_gf1_uart_reset(gus, 1);
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_MIDI_IN);
gus->midi_substream_input = NULL;
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
return 0;
}
static void snd_gf1_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct snd_gus_card *gus;
unsigned long flags;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (up) {
if ((gus->gf1.uart_cmd & 0x80) == 0)
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x80); /* enable Rx interrupts */
} else {
if (gus->gf1.uart_cmd & 0x80)
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x80); /* disable Rx interrupts */
}
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
}
static void snd_gf1_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
unsigned long flags;
struct snd_gus_card *gus;
char byte;
int timeout;
gus = substream->rmidi->private_data;
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (up) {
if ((gus->gf1.uart_cmd & 0x20) == 0) {
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
/* wait for empty Rx - Tx is probably unlocked */
timeout = 10000;
while (timeout-- > 0 && snd_gf1_uart_stat(gus) & 0x01);
/* Tx FIFO free? */
spin_lock_irqsave(&gus->uart_cmd_lock, flags);
if (gus->gf1.uart_cmd & 0x20) {
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
return;
}
if (snd_gf1_uart_stat(gus) & 0x02) {
if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
return;
}
snd_gf1_uart_put(gus, byte);
}
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd | 0x20); /* enable Tx interrupt */
}
} else {
if (gus->gf1.uart_cmd & 0x20)
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd & ~0x20);
}
spin_unlock_irqrestore(&gus->uart_cmd_lock, flags);
}
static struct snd_rawmidi_ops snd_gf1_uart_output =
{
.open = snd_gf1_uart_output_open,
.close = snd_gf1_uart_output_close,
.trigger = snd_gf1_uart_output_trigger,
};
static struct snd_rawmidi_ops snd_gf1_uart_input =
{
.open = snd_gf1_uart_input_open,
.close = snd_gf1_uart_input_close,
.trigger = snd_gf1_uart_input_trigger,
};
int snd_gf1_rawmidi_new(struct snd_gus_card * gus, int device, struct snd_rawmidi ** rrawmidi)
{
struct snd_rawmidi *rmidi;
int err;
if (rrawmidi)
*rrawmidi = NULL;
if ((err = snd_rawmidi_new(gus->card, "GF1", device, 1, 1, &rmidi)) < 0)
return err;
strcpy(rmidi->name, gus->interwave ? "AMD InterWave" : "GF1");
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_gf1_uart_output);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_gf1_uart_input);
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
rmidi->private_data = gus;
gus->midi_uart = rmidi;
if (rrawmidi)
*rrawmidi = rmidi;
return err;
}
|
