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
|
From de5f4660856350ac43f642bb7c5adf063fc68287 Mon Sep 17 00:00:00 2001
From: Kurt Mahan <kmahan@freescale.com>
Date: Mon, 10 Dec 2007 13:15:33 -0700
Subject: [PATCH] Fix to allow playback at other than 44.1.
LTIBName: m5445x-audio-rates
Signed-off-by: Kurt Mahan <kmahan@freescale.com>
---
drivers/spi/ssi_audio.c | 34 ++++++++++++++++++++++++----------
1 files changed, 24 insertions(+), 10 deletions(-)
--- a/drivers/spi/ssi_audio.c
+++ b/drivers/spi/ssi_audio.c
@@ -34,7 +34,6 @@
#define SOUND_DEVICE_NAME "sound"
#define DRIVER_NAME "ssi_audio"
-
/* #define AUDIO_DEBUG */
#ifdef CONFIG_MMU
@@ -315,24 +314,36 @@ static inline void disable_ssi(void)
}
/* Audio CODEC initialization */
-/* TODO: also the SSI frequency/dividers must be adjusted */
static void adjust_codec_speed(void) {
#ifdef AUDIO_DEBUG
printk(DRIVER_NAME ":adjust_codec_speed: %d\n", audio_device->speed);
#endif
-
- if (audio_device->speed == 8000) {
+ disable_ssi();
+ switch (audio_device->speed) {
+ case 8000:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(255);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_8KHZ);
- } else if (audio_device->speed == 16000) {
+ break;
+ case 16000:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(129);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_16KHZ);
- } else if (audio_device->speed == 22000) {
+ break;
+ case 22000:
+ case 22050:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(94);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_22KHZ);
- } else if (audio_device->speed == 44000 || audio_device->speed == 44100) {
+ break;
+ case 44000:
+ case 44100:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(47);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
- } else if (audio_device->speed == 48000) {
+ break;
+ case 48000:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(42);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_48KHZ);
- } else {
- /* default 44KHz */
+ break;
+ default:
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(47);
codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
}
}
@@ -712,6 +723,9 @@ static int ssi_audio_ioctl(struct inode
case SNDCTL_DSP_SAMPLESIZE:
if (access_ok(VERIFY_READ, (void *) arg, sizeof(val))) {
get_user(val, (unsigned long *) arg);
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_ioctl: SNDCTL_DSP_SAMPLESIZE: %d\n", val);
+#endif
ssi_audio_txdrain();
ssi_audio_setsamplesize(val);
} else {
|
