1 files changed, 178 insertions, 6 deletions

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index b793263291dc..745532ccbdba 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -517,7 +517,8 @@ static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair, bool use_ideal_rate)
 	regmap_update_bits(asrc->regmap, REG_ASRCTR,
 			   ASRCTR_ATSi_MASK(index), ASRCTR_ATS(index));
 	regmap_update_bits(asrc->regmap, REG_ASRCTR,
-			   ASRCTR_USRi_MASK(index), 0);
+			   ASRCTR_IDRi_MASK(index) | ASRCTR_USRi_MASK(index),
+			   ASRCTR_USR(index));
 
 	/* Set the input and output clock sources */
 	regmap_update_bits(asrc->regmap, REG_ASRCSR,
@@ -1063,6 +1064,139 @@ static int fsl_asrc_get_fifo_addr(u8 dir, enum asrc_pair_index index)
 	return REG_ASRDx(dir, index);
 }
 
+/* Get sample numbers in FIFO */
+static unsigned int fsl_asrc_get_output_fifo_size(struct fsl_asrc_pair *pair)
+{
+	struct fsl_asrc *asrc = pair->asrc;
+	enum asrc_pair_index index = pair->index;
+	u32 val;
+
+	regmap_read(asrc->regmap, REG_ASRFST(index), &val);
+
+	val &= ASRFSTi_OUTPUT_FIFO_MASK;
+
+	return val >> ASRFSTi_OUTPUT_FIFO_SHIFT;
+}
+
+static int fsl_asrc_m2m_prepare(struct fsl_asrc_pair *pair)
+{
+	struct fsl_asrc_pair_priv *pair_priv = pair->private;
+	struct fsl_asrc *asrc = pair->asrc;
+	struct device *dev = &asrc->pdev->dev;
+	struct asrc_config config;
+	int ret;
+
+	/* fill config */
+	config.pair = pair->index;
+	config.channel_num = pair->channels;
+	config.input_sample_rate = pair->rate[IN];
+	config.output_sample_rate = pair->rate[OUT];
+	config.input_format = pair->sample_format[IN];
+	config.output_format = pair->sample_format[OUT];
+	config.inclk = INCLK_NONE;
+	config.outclk = OUTCLK_ASRCK1_CLK;
+
+	pair_priv->config = &config;
+	ret = fsl_asrc_config_pair(pair, true);
+	if (ret) {
+		dev_err(dev, "failed to config pair: %d\n", ret);
+		return ret;
+	}
+
+	pair->first_convert = 1;
+
+	return 0;
+}
+
+static int fsl_asrc_m2m_start(struct fsl_asrc_pair *pair)
+{
+	if (pair->first_convert) {
+		fsl_asrc_start_pair(pair);
+		pair->first_convert = 0;
+	}
+	/*
+	 * Clear DMA request during the stall state of ASRC:
+	 * During STALL state, the remaining in input fifo would never be
+	 * smaller than the input threshold while the output fifo would not
+	 * be bigger than output one. Thus the DMA request would be cleared.
+	 */
+	fsl_asrc_set_watermarks(pair, ASRC_FIFO_THRESHOLD_MIN,
+				ASRC_FIFO_THRESHOLD_MAX);
+
+	/* Update the real input threshold to raise DMA request */
+	fsl_asrc_set_watermarks(pair, ASRC_M2M_INPUTFIFO_WML,
+				ASRC_M2M_OUTPUTFIFO_WML);
+
+	return 0;
+}
+
+static int fsl_asrc_m2m_stop(struct fsl_asrc_pair *pair)
+{
+	if (!pair->first_convert) {
+		fsl_asrc_stop_pair(pair);
+		pair->first_convert = 1;
+	}
+
+	return 0;
+}
+
+/* calculate capture data length according to output data length and sample rate */
+static int fsl_asrc_m2m_calc_out_len(struct fsl_asrc_pair *pair, int input_buffer_length)
+{
+	unsigned int in_width, out_width;
+	unsigned int channels = pair->channels;
+	unsigned int in_samples, out_samples;
+	unsigned int out_length;
+
+	in_width = snd_pcm_format_physical_width(pair->sample_format[IN]) / 8;
+	out_width = snd_pcm_format_physical_width(pair->sample_format[OUT]) / 8;
+
+	in_samples = input_buffer_length / in_width / channels;
+	out_samples = pair->rate[OUT] * in_samples / pair->rate[IN];
+	out_length = (out_samples - ASRC_OUTPUT_LAST_SAMPLE) * out_width * channels;
+
+	return out_length;
+}
+
+static int fsl_asrc_m2m_get_maxburst(u8 dir, struct fsl_asrc_pair *pair)
+{
+	struct fsl_asrc *asrc = pair->asrc;
+	struct fsl_asrc_priv *asrc_priv = asrc->private;
+	int wml = (dir == IN) ? ASRC_M2M_INPUTFIFO_WML : ASRC_M2M_OUTPUTFIFO_WML;
+
+	if (!asrc_priv->soc->use_edma)
+		return wml * pair->channels;
+	else
+		return 1;
+}
+
+static int fsl_asrc_m2m_get_cap(struct fsl_asrc_m2m_cap *cap)
+{
+	cap->fmt_in = FSL_ASRC_FORMATS;
+	cap->fmt_out = FSL_ASRC_FORMATS | SNDRV_PCM_FMTBIT_S8;
+
+	cap->rate_in = supported_asrc_rate;
+	cap->rate_in_count = ARRAY_SIZE(supported_asrc_rate);
+	cap->rate_out = supported_asrc_rate;
+	cap->rate_out_count = ARRAY_SIZE(supported_asrc_rate);
+	cap->chan_min = 1;
+	cap->chan_max = 10;
+
+	return 0;
+}
+
+static int fsl_asrc_m2m_pair_resume(struct fsl_asrc_pair *pair)
+{
+	struct fsl_asrc *asrc = pair->asrc;
+	int i;
+
+	for (i = 0; i < pair->channels * 4; i++)
+		regmap_write(asrc->regmap, REG_ASRDI(pair->index), 0);
+
+	pair->first_convert = 1;
+	return 0;
+}
+
 static int fsl_asrc_runtime_resume(struct device *dev);
 static int fsl_asrc_runtime_suspend(struct device *dev);
 
@@ -1147,6 +1281,15 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 	asrc->get_fifo_addr = fsl_asrc_get_fifo_addr;
 	asrc->pair_priv_size = sizeof(struct fsl_asrc_pair_priv);
 
+	asrc->m2m_prepare = fsl_asrc_m2m_prepare;
+	asrc->m2m_start = fsl_asrc_m2m_start;
+	asrc->m2m_stop = fsl_asrc_m2m_stop;
+	asrc->get_output_fifo_size = fsl_asrc_get_output_fifo_size;
+	asrc->m2m_calc_out_len = fsl_asrc_m2m_calc_out_len;
+	asrc->m2m_get_maxburst = fsl_asrc_m2m_get_maxburst;
+	asrc->m2m_pair_resume = fsl_asrc_m2m_pair_resume;
+	asrc->m2m_get_cap = fsl_asrc_m2m_get_cap;
+
 	if (of_device_is_compatible(np, "fsl,imx35-asrc")) {
 		asrc_priv->clk_map[IN] = input_clk_map_imx35;
 		asrc_priv->clk_map[OUT] = output_clk_map_imx35;
@@ -1242,6 +1385,12 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 		goto err_pm_get_sync;
 	}
 
+	ret = fsl_asrc_m2m_init(asrc);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to init m2m device %d\n", ret);
+		return ret;
+	}
+
 	return 0;
 
 err_pm_get_sync:
@@ -1254,6 +1403,10 @@ err_pm_disable:
 
 static void fsl_asrc_remove(struct platform_device *pdev)
 {
+	struct fsl_asrc *asrc = dev_get_drvdata(&pdev->dev);
+
+	fsl_asrc_m2m_exit(asrc);
+
 	pm_runtime_disable(&pdev->dev);
 	if (!pm_runtime_status_suspended(&pdev->dev))
 		fsl_asrc_runtime_suspend(&pdev->dev);
@@ -1355,10 +1508,29 @@ static int fsl_asrc_runtime_suspend(struct device *dev)
 	return 0;
 }
 
+static int fsl_asrc_suspend(struct device *dev)
+{
+	struct fsl_asrc *asrc = dev_get_drvdata(dev);
+	int ret;
+
+	fsl_asrc_m2m_suspend(asrc);
+	ret = pm_runtime_force_suspend(dev);
+	return ret;
+}
+
+static int fsl_asrc_resume(struct device *dev)
+{
+	struct fsl_asrc *asrc = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pm_runtime_force_resume(dev);
+	fsl_asrc_m2m_resume(asrc);
+	return ret;
+}
+
 static const struct dev_pm_ops fsl_asrc_pm = {
-	SET_RUNTIME_PM_OPS(fsl_asrc_runtime_suspend, fsl_asrc_runtime_resume, NULL)
-	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-				pm_runtime_force_resume)
+	RUNTIME_PM_OPS(fsl_asrc_runtime_suspend, fsl_asrc_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(fsl_asrc_suspend, fsl_asrc_resume)
 };
 
 static const struct fsl_asrc_soc_data fsl_asrc_imx35_data = {
@@ -1392,11 +1564,11 @@ MODULE_DEVICE_TABLE(of, fsl_asrc_ids);
 
 static struct platform_driver fsl_asrc_driver = {
 	.probe = fsl_asrc_probe,
-	.remove_new = fsl_asrc_remove,
+	.remove = fsl_asrc_remove,
 	.driver = {
 		.name = "fsl-asrc",
 		.of_match_table = fsl_asrc_ids,
-		.pm = &fsl_asrc_pm,
+		.pm = pm_ptr(&fsl_asrc_pm),
 	},
 };
 module_platform_driver(fsl_asrc_driver);