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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-28 17:41:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-28 17:41:58 +0200 |
| commit | 7b70888a192eff457c2ca0a4ffa04815f5e19734 (patch) | |
| tree | 8c75d6908b1e83b750b50e7a26da867926e0f5cd /sound/drivers/vx/vx_uer.c | |
| parent | [PATCH] speed up on find_first_bit for i386 (let compiler do the work) (diff) | |
| parent | [ALSA] version 1.0.9b (diff) | |
| download | linux-7b70888a192eff457c2ca0a4ffa04815f5e19734.tar.xz linux-7b70888a192eff457c2ca0a4ffa04815f5e19734.zip | |
Merge master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa
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 18114713c3b3..4fc38bde34f4 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 */ } |