tree 4846845e402718e8015500f712ae91c2c9d17a2e
parent fb92e6f05e84f6c217d786208e2ed5acf633b6ce
author Takashi Iwai <[EMAIL PROTECTED]> Wed, 27 Jul 2005 17:26:59 +0200
committer Jaroslav Kysela <[EMAIL PROTECTED]> Thu, 28 Jul 2005 12:27:02 +0200
[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 <[EMAIL PROTECTED]>
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
--- 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
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 */
}
-
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