ASoC: rt5640: Add RL6231 class device shared support for RT5640, RT5645 and RT5651

67 lines not on this page · raw message

new file mode 100644
index 0000000..00032db
@@ -0,0 +1,18 @@
+/*
+ * rl6231.h - RL6231 class device shared support
+ *
+ * Copyright 2014 Realtek Semiconductor Corp.
+ *
+ * Author: Oder Chiou <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __RL6231_H__
+#define __RL6231_H__
+
+int rl6231_calc_dmic_clk(int rate);
+
+#endif /* __RL6231_H__ */

index 9e0d48f..0cefc16 100644
@@ -31,6 +31,7 @@
 #include <sound/initval.h>
 #include <sound/tlv.h>
 
+#include "rl6231.h"
 #include "rt5640.h"
 
 #define RT5640_DEVICE_ID 0x6231

@@ -453,30 +454,16 @@ static const struct snd_kcontrol_new rt5640_specific_snd_controls[] = {
  * @kcontrol: The kcontrol of this widget.
  * @event: Event id.
  *
- * Choose dmic clock between 1MHz and 3MHz.
- * It is better for clock to approximate 3MHz.
  */
 static int set_dmic_clk(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_codec *codec = w->codec;
 	struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec);
-	int div[] = {2, 3, 4, 6, 8, 12};
-	int idx = -EINVAL, i;
-	int rate, red, bound, temp;
-
-	rate = rt5640->sysclk;
-	red = 3000000 * 12;
-	for (i = 0; i < ARRAY_SIZE(div); i++) {
-		bound = div[i] * 3000000;
-		if (rate > bound)
-			continue;
-		temp = bound - rate;
-		if (temp < red) {
-			red = temp;
-			idx = i;
-		}
-	}
+	int idx = -EINVAL;
+
+	idx = rl6231_calc_dmic_clk(rt5640->sysclk);
+
 	if (idx < 0)
 		dev_err(codec->dev, "Failed to set DMIC clock\n");
 	else

index ab97d72..caa5519 100644
@@ -26,6 +26,7 @@
 #include <sound/initval.h>
 #include <sound/tlv.h>
 
+#include "rl6231.h"
 #include "rt5645.h"
 
 #define RT5645_DEVICE_ID 0x6308

@@ -519,30 +520,15 @@ static const struct snd_kcontrol_new rt5645_snd_controls[] = {
  * @kcontrol: The kcontrol of this widget.
  * @event: Event id.
  *
- * Choose dmic clock between 1MHz and 3MHz.
- * It is better for clock to approximate 3MHz.
  */
 static int set_dmic_clk(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_codec *codec = w->codec;
 	struct rt5645_priv *rt5645 = snd_soc_codec_get_drvdata(codec);
-	int div[] = {2, 3, 4, 6, 8, 12};
-	int idx = -EINVAL, i;
-	int rate, red, bound, temp;
-
-	rate = rt5645->sysclk;
-	red = 3000000 * 12;
-	for (i = 0; i < ARRAY_SIZE(div); i++) {
-		bound = div[i] * 3000000;
-		if (rate > bound)
-			continue;
-		temp = bound - rate;
-		if (temp < red) {
-			red = temp;
-			idx = i;
-		}
-	}
+	int idx = -EINVAL;
+
+	idx = rl6231_calc_dmic_clk(rt5645->sysclk);
 
 	if (idx < 0)
 		dev_err(codec->dev, "Failed to set DMIC clock\n");

index 9c88d89..7a7bec6 100644
@@ -26,6 +26,7 @@
 #include <sound/initval.h>
 #include <sound/tlv.h>
 
+#include "rl6231.h"
 #include "rt5651.h"
 
 #define RT5651_DEVICE_ID_VALUE 0x6281

@@ -371,29 +372,16 @@ static const struct snd_kcontrol_new rt5651_snd_controls[] = {
  * @kcontrol: The kcontrol of this widget.
  * @event: Event id.
  *
- * Choose dmic clock between 1MHz and 3MHz.
- * It is better for clock to approximate 3MHz.
  */
 static int set_dmic_clk(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_codec *codec = w->codec;
 	struct rt5651_priv *rt5651 = snd_soc_codec_get_drvdata(codec);
-	int div[] = {2, 3, 4, 6, 8, 12}, idx = -EINVAL;
-	int i, rate, red, bound, temp;
-
-	rate = rt5651->sysclk;
-	red = 3000000 * 12;
-	for (i = 0; i < ARRAY_SIZE(div); i++) {
-		bound = div[i] * 3000000;
-		if (rate > bound)
-			continue;
-		temp = bound - rate;
-		if (temp < red) {
-			red = temp;
-			idx = i;
-		}
-	}
+	int idx = -EINVAL;
+
+	idx = rl6231_calc_dmic_clk(rt5651->sysclk);
+
 	if (idx < 0)
 		dev_err(codec->dev, "Failed to set DMIC clock\n");
 	else

index 13ac551..289024b 100644
@@ -62,6 +62,75 @@ int rl6231_calc_dmic_clk(int rate)
 }
 EXPORT_SYMBOL_GPL(rl6231_calc_dmic_clk);
 
+/**
+ * rl6231_pll_calc - Calcualte PLL M/N/K code.
+ * @freq_in: external clock provided to codec.
+ * @freq_out: target clock which codec works on.
+ * @pll_code: Pointer to structure with M, N, K and bypass flag.
+ *
+ * Calcualte M/N/K code to configure PLL for codec.
+ *
+ * Returns 0 for success or negative error code.
+ */
+int rl6231_pll_calc(const unsigned int freq_in,
+	const unsigned int freq_out, struct rl6231_pll_code *pll_code)
+{
+	int max_n = RL6231_PLL_N_MAX, max_m = RL6231_PLL_M_MAX;
+	int k, red, n_t, pll_out, in_t, out_t;
+	int n = 0, m = 0, m_t = 0;
+	int red_t = abs(freq_out - freq_in);
+	bool bypass = false;
+
+	if (RL6231_PLL_INP_MAX < freq_in || RL6231_PLL_INP_MIN > freq_in)
+		return -EINVAL;
+
+	k = 100000000 / freq_out - 2;
+	if (k > RL6231_PLL_K_MAX)
+		k = RL6231_PLL_K_MAX;
+	for (n_t = 0; n_t <= max_n; n_t++) {
+		in_t = freq_in / (k + 2);
+		pll_out = freq_out / (n_t + 2);
+		if (in_t < 0)
+			continue;
+		if (in_t == pll_out) {
+			bypass = true;
+			n = n_t;
+			goto code_find;
+		}
+		red = abs(in_t - pll_out);
+		if (red < red_t) {
+			bypass = true;
+			n = n_t;
+			m = m_t;
+			if (red == 0)
+				goto code_find;
+			red_t = red;
+		}
+		for (m_t = 0; m_t <= max_m; m_t++) {
+			out_t = in_t / (m_t + 2);
+			red = abs(out_t - pll_out);
+			if (red < red_t) {
+				bypass = false;
+				n = n_t;
+				m = m_t;
+				if (red == 0)
+					goto code_find;
+				red_t = red;
+			}
+		}
+	}
+	pr_debug("Only get approximation about PLL\n");
+
+code_find:
+
+	pll_code->m_bp = bypass;
+	pll_code->m_code = m;
+	pll_code->n_code = n;
+	pll_code->k_code = k;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rl6231_pll_calc);
+
 MODULE_DESCRIPTION("RL6231 class device shared support");
 MODULE_AUTHOR("Oder Chiou <[email protected]>");
 MODULE_LICENSE("GPL v2");

index 00032db..efdfc86 100644
@@ -13,6 +13,21 @@
 #ifndef __RL6231_H__
 #define __RL6231_H__
 
+#define RL6231_PLL_INP_MAX	40000000
+#define RL6231_PLL_INP_MIN	256000
+#define RL6231_PLL_N_MAX	0x1ff
+#define RL6231_PLL_K_MAX	0x1f
+#define RL6231_PLL_M_MAX	0xf
+
+struct rl6231_pll_code {
+	bool m_bp; /* Indicates bypass m code or not. */
+	int m_code;
+	int n_code;
+	int k_code;
+};
+
 int rl6231_calc_dmic_clk(int rate);
+int rl6231_pll_calc(const unsigned int freq_in,
+	const unsigned int freq_out, struct rl6231_pll_code *pll_code);
 
 #endif /* __RL6231_H__ */

93 lines not on this page · raw message

index 895ca14..58ebe96 100644
@@ -2079,13 +2079,6 @@ enum {
 	RT5640_DMIC2,
 };
 
-struct rt5640_pll_code {
-	bool m_bp; /* Indicates bypass m code or not. */
-	int m_code;
-	int n_code;
-	int k_code;
-};
-
 struct rt5640_priv {
 	struct snd_soc_codec *codec;
 	struct rt5640_platform_data pdata;

@@ -2097,7 +2090,6 @@ struct rt5640_priv {
 	int bclk[RT5640_AIFS];
 	int master[RT5640_AIFS];
 
-	struct rt5640_pll_code pll_code;
 	int pll_src;
 	int pll_in;
 	int pll_out;

89 lines not on this page · raw message

index 345aa3f..355b7e9 100644
@@ -2162,13 +2162,6 @@ enum {
 	RT5645_DMIC_DATA_GPIO11,
 };
 
-struct rt5645_pll_code {
-	bool m_bp; /* Indicates bypass m code or not. */
-	int m_code;
-	int n_code;
-	int k_code;
-};
-
 struct rt5645_priv {
 	struct snd_soc_codec *codec;
 	struct rt5645_platform_data pdata;

93 lines not on this page · raw message

index a28bd0c..1bd33cf 100644
@@ -2069,7 +2069,6 @@ struct rt5651_priv {
 	int bclk[RT5651_AIFS];
 	int master[RT5651_AIFS];
 
-	struct rt5651_pll_code pll_code;
 	int pll_src;
 	int pll_in;
 	int pll_out;

index 289024b..7b82fbe 100644
@@ -131,6 +131,22 @@ code_find:
 }
 EXPORT_SYMBOL_GPL(rl6231_pll_calc);
 
+int rl6231_get_clk_info(int sclk, int rate)
+{
+	int i, pd[] = {1, 2, 3, 4, 6, 8, 12, 16};
+
+	if (sclk <= 0 || rate <= 0)
+		return -EINVAL;
+
+	rate = rate << 8;
+	for (i = 0; i < ARRAY_SIZE(pd); i++)
+		if (sclk == rate * pd[i])
+			return i;
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(rl6231_get_clk_info);
+
 MODULE_DESCRIPTION("RL6231 class device shared support");
 MODULE_AUTHOR("Oder Chiou <[email protected]>");
 MODULE_LICENSE("GPL v2");

index efdfc86..0f7b057 100644
@@ -29,5 +29,6 @@ struct rl6231_pll_code {
 int rl6231_calc_dmic_clk(int rate);
 int rl6231_pll_calc(const unsigned int freq_in,
 	const unsigned int freq_out, struct rl6231_pll_code *pll_code);
+int rl6231_get_clk_info(int sclk, int rate);
 
 #endif /* __RL6231_H__ */

index bdc1a94..de80e89 100644
@@ -1626,21 +1626,6 @@ static int get_sdp_info(struct snd_soc_codec *codec, int dai_id)
 	return ret;
 }
 
-static int get_clk_info(int sclk, int rate)
-{
-	int i, pd[] = {1, 2, 3, 4, 6, 8, 12, 16};
-
-	if (sclk <= 0 || rate <= 0)
-		return -EINVAL;
-
-	rate = rate << 8;
-	for (i = 0; i < ARRAY_SIZE(pd); i++)
-		if (sclk == rate * pd[i])
-			return i;
-
-	return -EINVAL;
-}
-
 static int rt5640_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {

@@ -1650,7 +1635,7 @@ static int rt5640_hw_params(struct snd_pcm_substream *substream,
 	int dai_sel, pre_div, bclk_ms, frame_size;
 
 	rt5640->lrck[dai->id] = params_rate(params);
-	pre_div = get_clk_info(rt5640->sysclk, rt5640->lrck[dai->id]);
+	pre_div = rl6231_get_clk_info(rt5640->sysclk, rt5640->lrck[dai->id]);
 	if (pre_div < 0) {
 		dev_err(codec->dev, "Unsupported clock setting %d for DAI %d\n",
 			rt5640->lrck[dai->id], dai->id);

index ee6db7c..02147be 100644
@@ -1786,21 +1786,6 @@ static const struct snd_soc_dapm_route rt5645_dapm_routes[] = {
 	{ "SPOR", NULL, "SPK amp" },
 };
 
-static int get_clk_info(int sclk, int rate)
-{
-	int i, pd[] = {1, 2, 3, 4, 6, 8, 12, 16};
-
-	if (sclk <= 0 || rate <= 0)
-		return -EINVAL;
-
-	rate = rate << 8;
-	for (i = 0; i < ARRAY_SIZE(pd); i++)
-		if (sclk == rate * pd[i])
-			return i;
-
-	return -EINVAL;
-}
-
 static int rt5645_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {

@@ -1810,7 +1795,7 @@ static int rt5645_hw_params(struct snd_pcm_substream *substream,
 	int pre_div, bclk_ms, frame_size;
 
 	rt5645->lrck[dai->id] = params_rate(params);
-	pre_div = get_clk_info(rt5645->sysclk, rt5645->lrck[dai->id]);
+	pre_div = rl6231_get_clk_info(rt5645->sysclk, rt5645->lrck[dai->id]);
 	if (pre_div < 0) {
 		dev_err(codec->dev, "Unsupported clock setting\n");
 		return -EINVAL;

index a627a1f..ea4b1c6 100644
@@ -1338,21 +1338,6 @@ static const struct snd_soc_dapm_route rt5651_dapm_routes[] = {
 	{"PDMR", NULL, "PDM R Mux"},
 };
 
-static int get_clk_info(int sclk, int rate)
-{
-	int i, pd[] = {1, 2, 3, 4, 6, 8, 12, 16};
-
-	if (sclk <= 0 || rate <= 0)
-		return -EINVAL;
-
-	rate = rate << 8;
-	for (i = 0; i < ARRAY_SIZE(pd); i++)
-		if (sclk == rate * pd[i])
-			return i;
-
-	return -EINVAL;
-}
-
 static int rt5651_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {

@@ -1362,7 +1347,7 @@ static int rt5651_hw_params(struct snd_pcm_substream *substream,
 	int pre_div, bclk_ms, frame_size;
 
 	rt5651->lrck[dai->id] = params_rate(params);
-	pre_div = get_clk_info(rt5651->sysclk, rt5651->lrck[dai->id]);
+	pre_div = rl6231_get_clk_info(rt5651->sysclk, rt5651->lrck[dai->id]);
 
 	if (pre_div < 0) {
 		dev_err(codec->dev, "Unsupported clock setting\n");