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-rw-r--r--firmware/target/coldfire/pcm-coldfire.c4
-rw-r--r--firmware/target/coldfire/pcm-mixer-coldfire.c134
2 files changed, 138 insertions, 0 deletions
diff --git a/firmware/target/coldfire/pcm-coldfire.c b/firmware/target/coldfire/pcm-coldfire.c
index a06542c31f..85eeaec815 100644
--- a/firmware/target/coldfire/pcm-coldfire.c
+++ b/firmware/target/coldfire/pcm-coldfire.c
@@ -28,6 +28,7 @@
28#if defined(HAVE_SPDIF_REC) || defined(HAVE_SPDIF_OUT) 28#if defined(HAVE_SPDIF_REC) || defined(HAVE_SPDIF_OUT)
29#include "spdif.h" 29#include "spdif.h"
30#endif 30#endif
31#include "pcm-internal.h"
31 32
32#define IIS_PLAY_DEFPARM ( (freq_ent[FPARM_CLOCKSEL] << 12) | \ 33#define IIS_PLAY_DEFPARM ( (freq_ent[FPARM_CLOCKSEL] << 12) | \
33 (IIS_PLAY & (7 << 8)) | \ 34 (IIS_PLAY & (7 << 8)) | \
@@ -318,6 +319,9 @@ void DMA0(void)
318 SAR0 = (unsigned long)start; /* Source address */ 319 SAR0 = (unsigned long)start; /* Source address */
319 BCR0 = size; /* Bytes to transfer */ 320 BCR0 = size; /* Bytes to transfer */
320 or_l(DMA_EEXT | DMA_INT, &DCR0); /* per request and int ON */ 321 or_l(DMA_EEXT | DMA_INT, &DCR0); /* per request and int ON */
322
323 /* Call buffer callback */
324 pcm_play_dma_started_callback();
321 } 325 }
322 /* else inished playing */ 326 /* else inished playing */
323} /* DMA0 */ 327} /* DMA0 */
diff --git a/firmware/target/coldfire/pcm-mixer-coldfire.c b/firmware/target/coldfire/pcm-mixer-coldfire.c
new file mode 100644
index 0000000000..d8318fffaf
--- /dev/null
+++ b/firmware/target/coldfire/pcm-mixer-coldfire.c
@@ -0,0 +1,134 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2011 by Michael Sevakis
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21
22#define MIXER_OPTIMIZED_MIX_SAMPLES
23#define MIXER_OPTIMIZED_WRITE_SAMPLES
24static struct emac_context
25{
26 unsigned long r[4];
27} emac_context IBSS_ATTR;
28
29/* Save emac context affected in ISR */
30static FORCE_INLINE void save_emac_context(void)
31{
32 asm volatile (
33 "move.l %%macsr, %%d0 \n"
34 "move.l %%accext01, %%d1 \n"
35 "movclr.l %%acc0, %%a0 \n"
36 "movclr.l %%acc1, %%a1 \n"
37 "movem.l %%d0-%%d1/%%a0-%%a1, (%0) \n"
38 :
39 : "a"(&emac_context)
40 : "d0", "d1", "a0", "a1");
41}
42
43/* Restore emac context affected in ISR */
44static FORCE_INLINE void restore_emac_context(void)
45{
46 asm volatile (
47 "movem.l (%0), %%d0-%%d1/%%a0-%%a1 \n"
48 "move.l %%a1, %%acc1 \n"
49 "move.l %%a0, %%acc0 \n"
50 "move.l %%d1, %%accext01 \n"
51 "move.l %%d0, %%macsr \n"
52 :
53 : "a"(&emac_context)
54 : "d0", "d1", "a0", "a1");
55}
56
57/* Mix channels' samples and apply gain factors */
58static FORCE_INLINE void mix_samples(void *out,
59 void *src0,
60 int32_t src0_amp,
61 void *src1,
62 int32_t src1_amp,
63 size_t size)
64{
65 uint32_t s0, s1, s2, s3;
66 save_emac_context();
67 coldfire_set_macsr(EMAC_ROUND | EMAC_SATURATE);
68
69 asm volatile (
70 "move.l (%1)+, %5 \n"
71 "1: \n"
72 "movea.w %5, %4 \n"
73 "asr.l %10, %5 \n"
74 "mac.l %4, %8, %%acc0 \n"
75 "mac.l %5, %8, (%2)+, %5, %%acc1 \n"
76 "movea.w %5, %4 \n"
77 "asr.l %10, %5 \n"
78 "mac.l %4, %9, %%acc0 \n"
79 "mac.l %5, %9, (%1)+, %5, %%acc1 \n"
80 "movclr.l %%acc0, %6 \n"
81 "movclr.l %%acc1, %7 \n"
82 "swap.w %6 \n"
83 "move.w %6, %7 \n"
84 "move.l %7, (%0)+ \n"
85 "subq.l #4, %3 \n"
86 "bhi.b 1b \n"
87 : "+a"(out), "+a"(src0), "+a"(src1), "+d"(size),
88 "=&a"(s0), "=&d"(s1), "=&d"(s2), "=&d"(s3)
89 : "r"(src0_amp), "r"(src1_amp), "d"(16)
90 );
91
92 restore_emac_context();
93}
94
95/* Write channel's samples and apply gain factor */
96static FORCE_INLINE void write_samples(void *out,
97 void *src,
98 int32_t amp,
99 size_t size)
100{
101 if (LIKELY(amp == MIX_AMP_UNITY))
102 {
103 /* Channel is unity amplitude */
104 memcpy(out, src, size);
105 }
106 else
107 {
108 /* Channel needs amplitude cut */
109 uint32_t s0, s1, s2, s3;
110 save_emac_context();
111 coldfire_set_macsr(EMAC_ROUND | EMAC_SATURATE);
112
113 asm volatile (
114 "move.l (%1)+, %4 \n"
115 "1: \n"
116 "movea.w %4, %3 \n"
117 "asr.l %8, %4 \n"
118 "mac.l %3, %7, %%acc0 \n"
119 "mac.l %4, %7, (%1)+, %4, %%acc1 \n"
120 "movclr.l %%acc0, %5 \n"
121 "movclr.l %%acc1, %6 \n"
122 "swap.w %5 \n"
123 "move.w %5, %6 \n"
124 "move.l %6, (%0)+ \n"
125 "subq.l #4, %2 \n"
126 "bhi.b 1b \n"
127 : "+a"(out), "+a"(src), "+d"(size),
128 "=&a"(s0), "=&d"(s1), "=&d"(s2), "=&d"(s3)
129 : "r"(amp), "d"(16)
130 );
131
132 restore_emac_context();
133 }
134}
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