diff options
| author | Takashi Iwai <tiwai@suse.de> | 2005-07-27 17:26:59 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2005-07-28 12:27:02 +0200 |
| commit | 7b566054b33474cdd674289a8c7dd282c02e536e (patch) | |
| tree | 4846845e402718e8015500f712ae91c2c9d17a2e /sound/drivers/vx/vx_uer.c | |
| parent | fb92e6f05e84f6c217d786208e2ed5acf633b6ce (diff) | |
[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>
Diffstat (limited to 'sound/drivers/vx/vx_uer.c')
| -rw-r--r-- | sound/drivers/vx/vx_uer.c | 46 |
1 files changed, 18 insertions, 28 deletions
diff --git a/sound/drivers/vx/vx_uer.c b/sound/drivers/vx/vx_uer.c index 18114713c3b..4fc38bde34f 100644 --- a/sound/drivers/vx/vx_uer.c +++ b/sound/drivers/vx/vx_uer.c @@ -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 - - 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 */ - } + int hexfreq; + + 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 */ } |