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Diffstat (limited to 'sound/soc/codecs/cs4270.c')
-rw-r--r--sound/soc/codecs/cs4270.c49
1 files changed, 8 insertions, 41 deletions
diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c
index 8beae65d083c..43d50a4d8089 100644
--- a/sound/soc/codecs/cs4270.c
+++ b/sound/soc/codecs/cs4270.c
@@ -56,35 +56,6 @@ static unsigned int mclk_ratios[NUM_MCLK_RATIOS] =
56 {64, 96, 128, 192, 256, 384, 512, 768, 1024}; 56 {64, 96, 128, 192, 256, 384, 512, 768, 1024};
57 57
58/* 58/*
59 * Sampling rate <-> bit patter mapping
60 *
61 * This array maps sampling rates to their SNDRV_PCM_RATE_x equivalent.
62 *
63 * This is really something that ALSA should provide.
64 *
65 * This table is used by cs4270_set_dai_sysclk() to tell ALSA which sampling
66 * rates the CS4270 currently supports.
67 */
68static struct {
69 unsigned int rate;
70 unsigned int bit;
71} rate_map[] = {
72 {5512, SNDRV_PCM_RATE_5512},
73 {8000, SNDRV_PCM_RATE_8000},
74 {11025, SNDRV_PCM_RATE_11025},
75 {16000, SNDRV_PCM_RATE_16000},
76 {22050, SNDRV_PCM_RATE_22050},
77 {32000, SNDRV_PCM_RATE_32000},
78 {44100, SNDRV_PCM_RATE_44100},
79 {48000, SNDRV_PCM_RATE_48000},
80 {64000, SNDRV_PCM_RATE_64000},
81 {88200, SNDRV_PCM_RATE_88200},
82 {96000, SNDRV_PCM_RATE_96000},
83 {176400, SNDRV_PCM_RATE_176400},
84 {192000, SNDRV_PCM_RATE_192000}
85};
86
87/*
88 * Determine the CS4270 samples rates. 59 * Determine the CS4270 samples rates.
89 * 60 *
90 * 'freq' is the input frequency to MCLK. The other parameters are ignored. 61 * 'freq' is the input frequency to MCLK. The other parameters are ignored.
@@ -126,19 +97,15 @@ static int cs4270_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai,
126 cs4270->mclk = freq; 97 cs4270->mclk = freq;
127 98
128 for (i = 0; i < NUM_MCLK_RATIOS; i++) { 99 for (i = 0; i < NUM_MCLK_RATIOS; i++) {
129 unsigned int rate; 100 unsigned int rate = freq / mclk_ratios[i];
130 unsigned int j; 101 rates |= snd_pcm_rate_to_rate_bit(rate);
131 rate = freq / mclk_ratios[i]; 102 if (rate < rate_min)
132 for (j = 0; j < ARRAY_SIZE(rate_map); j++) { 103 rate_min = rate;
133 if (rate == rate_map[j].rate) { 104 if (rate > rate_max)
134 rates |= rate_map[j].bit; 105 rate_max = rate;
135 if (rate < rate_min)
136 rate_min = rate;
137 if (rate > rate_max)
138 rate_max = rate;
139 }
140 }
141 } 106 }
107 /* FIXME: soc should support a rate list */
108 rates &= ~SNDRV_PCM_RATE_KNOT;
142 109
143 if (!rates) { 110 if (!rates) {
144 printk(KERN_ERR "cs4270: could not find a valid sample rate\n"); 111 printk(KERN_ERR "cs4270: could not find a valid sample rate\n");