hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[ALSA] vx-driver - Fix the calculation of frequency parameter 

Digigram VX core
Fixed the calculation of frequency parameter of vx boards.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-07-27 17:26:59 +02:00 committed by Jaroslav Kysela
parent fb92e6f05e
commit 7b566054b3
1 changed files with 17 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
sound/drivers/vx/vx_uer.c
View File

@ -162,34 +162,24 @@ static int vx_read_uer_status(vx_core_t *chip, int *mode)
static int vx_calc_clock_from_freq(vx_core_t *chip, int freq)
{
#define XX_FECH48000 0x0000004B
#define XX_FECH32000 0x00000171
#define XX_FECH24000 0x0000024B
#define XX_FECH16000 0x00000371
#define XX_FECH12000 0x0000044B
#define XX_FECH8000 0x00000571
#define XX_FECH44100 0x0000007F
#define XX_FECH29400 0x0000016F
#define XX_FECH22050 0x0000027F
#define XX_FECH14000 0x000003EF
#define XX_FECH11025 0x0000047F
#define XX_FECH7350 0x000005BF
int hexfreq;
switch (freq) {
case 48000: return XX_FECH48000;
case 44100: return XX_FECH44100;
case 32000: return XX_FECH32000;
case 29400: return XX_FECH29400;
case 24000: return XX_FECH24000;
case 22050: return XX_FECH22050;
case 16000: return XX_FECH16000;
case 14000: return XX_FECH14000;
case 12000: return XX_FECH12000;
case 11025: return XX_FECH11025;
case 8000: return XX_FECH8000;
case 7350: return XX_FECH7350;
default: return freq; /* The value is already correct */
}
snd_assert(freq > 0, return 0);
hexfreq = (28224000 * 10) / freq;
hexfreq = (hexfreq + 5) / 10;
/* max freq = 55125 Hz */
snd_assert(hexfreq > 0x00000200, return 0);
if (hexfreq <= 0x03ff)
return hexfreq - 0x00000201;
if (hexfreq <= 0x07ff)
return (hexfreq / 2) - 1;
if (hexfreq <= 0x0fff)
return (hexfreq / 4) + 0x000001ff;
return 0x5fe; /* min freq = 6893 Hz */
}