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
|
/*
**********************************************************************
* passthrough.c -- Emu10k1 digital passthrough
* Copyright (C) 2001 Juha Yrjölä <jyrjola@cc.hut.fi>
*
**********************************************************************
*
* Date Author Summary of changes
* ---- ------ ------------------
* May 15, 2001 Juha Yrjölä base code release
*
**********************************************************************
*
* 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., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
**********************************************************************
*/
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include "hwaccess.h"
#include "cardwo.h"
#include "cardwi.h"
#include "recmgr.h"
#include "irqmgr.h"
#include "audio.h"
#include "8010.h"
static void pt_putsamples(struct pt_data *pt, u16 *ptr, u16 left, u16 right)
{
unsigned int idx;
ptr[pt->copyptr] = left;
idx = pt->copyptr + PT_SAMPLES/2;
idx %= PT_SAMPLES;
ptr[idx] = right;
}
static inline int pt_can_write(struct pt_data *pt)
{
return pt->blocks_copied < pt->blocks_played + 8;
}
static int pt_wait_for_write(struct emu10k1_wavedevice *wavedev, int nonblock)
{
struct emu10k1_card *card = wavedev->card;
struct pt_data *pt = &card->pt;
if (nonblock && !pt_can_write(pt))
return -EAGAIN;
while (!pt_can_write(pt) && pt->state != PT_STATE_INACTIVE) {
interruptible_sleep_on(&pt->wait);
if (signal_pending(current))
return -ERESTARTSYS;
}
if (pt->state == PT_STATE_INACTIVE)
return -EAGAIN;
return 0;
}
static int pt_putblock(struct emu10k1_wavedevice *wave_dev, u16 *block, int nonblock)
{
struct woinst *woinst = wave_dev->woinst;
struct emu10k1_card *card = wave_dev->card;
struct pt_data *pt = &card->pt;
u16 *ptr = (u16 *) card->tankmem.addr;
int i = 0, r;
unsigned long flags;
r = pt_wait_for_write(wave_dev, nonblock);
if (r < 0)
return r;
spin_lock_irqsave(&card->pt.lock, flags);
while (i < PT_BLOCKSAMPLES) {
pt_putsamples(pt, ptr, block[2*i], block[2*i+1]);
if (pt->copyptr == 0)
pt->copyptr = PT_SAMPLES;
pt->copyptr--;
i++;
}
woinst->total_copied += PT_BLOCKSIZE;
pt->blocks_copied++;
if (pt->blocks_copied >= 4 && pt->state != PT_STATE_PLAYING) {
DPF(2, "activating digital pass-through playback\n");
sblive_writeptr(card, GPR_BASE + pt->enable_gpr, 0, 1);
pt->state = PT_STATE_PLAYING;
}
spin_unlock_irqrestore(&card->pt.lock, flags);
return 0;
}
int emu10k1_pt_setup(struct emu10k1_wavedevice *wave_dev)
{
u32 bits;
struct emu10k1_card *card = wave_dev->card;
struct pt_data *pt = &card->pt;
int i;
for (i = 0; i < 3; i++) {
pt->old_spcs[i] = sblive_readptr(card, SPCS0 + i, 0);
if (pt->spcs_to_use & (1 << i)) {
DPD(2, "using S/PDIF port %d\n", i);
bits = SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC | SPCS_GENERATIONSTATUS |
0x00001200 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT;
if (pt->ac3data)
bits |= SPCS_NOTAUDIODATA;
sblive_writeptr(card, SPCS0 + i, 0, bits);
}
}
return 0;
}
ssize_t emu10k1_pt_write(struct file *file, const char __user *buffer, size_t count)
{
struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
struct emu10k1_card *card = wave_dev->card;
struct pt_data *pt = &card->pt;
int nonblock, i, r, blocks, blocks_copied, bytes_copied = 0;
DPD(3, "emu10k1_pt_write(): %d bytes\n", count);
nonblock = file->f_flags & O_NONBLOCK;
if (card->tankmem.size < PT_SAMPLES*2)
return -EFAULT;
if (pt->state == PT_STATE_INACTIVE) {
DPF(2, "bufptr init\n");
pt->playptr = PT_SAMPLES-1;
pt->copyptr = PT_INITPTR;
pt->blocks_played = pt->blocks_copied = 0;
memset(card->tankmem.addr, 0, card->tankmem.size);
pt->state = PT_STATE_ACTIVATED;
pt->buf = kmalloc(PT_BLOCKSIZE, GFP_KERNEL);
pt->prepend_size = 0;
if (pt->buf == NULL)
return -ENOMEM;
emu10k1_pt_setup(wave_dev);
}
if (pt->prepend_size) {
int needed = PT_BLOCKSIZE - pt->prepend_size;
DPD(3, "prepend size %d, prepending %d bytes\n", pt->prepend_size, needed);
if (count < needed) {
if (copy_from_user(pt->buf + pt->prepend_size,
buffer, count))
return -EFAULT;
pt->prepend_size += count;
DPD(3, "prepend size now %d\n", pt->prepend_size);
return count;
}
if (copy_from_user(pt->buf + pt->prepend_size, buffer, needed))
return -EFAULT;
r = pt_putblock(wave_dev, (u16 *) pt->buf, nonblock);
if (r)
return r;
bytes_copied += needed;
pt->prepend_size = 0;
}
blocks = (count-bytes_copied)/PT_BLOCKSIZE;
blocks_copied = 0;
while (blocks > 0) {
u16 __user *bufptr = (u16 __user *) buffer + (bytes_copied/2);
if (copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE))
return -EFAULT;
r = pt_putblock(wave_dev, (u16 *)pt->buf, nonblock);
if (r) {
if (bytes_copied)
return bytes_copied;
else
return r;
}
bytes_copied += PT_BLOCKSIZE;
blocks--;
blocks_copied++;
}
i = count - bytes_copied;
if (i) {
pt->prepend_size = i;
if (copy_from_user(pt->buf, buffer + bytes_copied, i))
return -EFAULT;
bytes_copied += i;
DPD(3, "filling prepend buffer with %d bytes", i);
}
return bytes_copied;
}
void emu10k1_pt_stop(struct emu10k1_card *card)
{
struct pt_data *pt = &card->pt;
int i;
if (pt->state != PT_STATE_INACTIVE) {
DPF(2, "digital pass-through stopped\n");
sblive_writeptr(card, (card->is_audigy ? A_GPR_BASE : GPR_BASE) + pt->enable_gpr, 0, 0);
for (i = 0; i < 3; i++) {
if (pt->spcs_to_use & (1 << i))
sblive_writeptr(card, SPCS0 + i, 0, pt->old_spcs[i]);
}
pt->state = PT_STATE_INACTIVE;
kfree(pt->buf);
}
}
void emu10k1_pt_waveout_update(struct emu10k1_wavedevice *wave_dev)
{
struct woinst *woinst = wave_dev->woinst;
struct pt_data *pt = &wave_dev->card->pt;
u32 pos;
if (pt->state == PT_STATE_PLAYING && pt->pos_gpr >= 0) {
pos = sblive_readptr(wave_dev->card, GPR_BASE + pt->pos_gpr, 0);
if (pos > PT_BLOCKSAMPLES)
pos = PT_BLOCKSAMPLES;
pos = 4 * (PT_BLOCKSAMPLES - pos);
} else
pos = 0;
woinst->total_played = pt->blocks_played * woinst->buffer.fragment_size + pos;
woinst->buffer.hw_pos = pos;
}
|
