forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/sound/soc/adi/axi-i2s.c
....@@ -1,8 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (C) 2012-2013, Analog Devices Inc.
34  * Author: Lars-Peter Clausen <lars@metafoo.de>
4
- *
5
- * Licensed under the GPL-2.
65  */
76 
87 #include <linux/clk.h>
....@@ -42,6 +41,9 @@
4241 	struct regmap *regmap;
4342 	struct clk *clk;
4443 	struct clk *clk_ref;
44
+
45
+	bool   has_capture;
46
+	bool   has_playback;
4547 
4648 	struct snd_soc_dai_driver dai_driver;
4749 
....@@ -136,8 +138,10 @@
136138 {
137139 	struct axi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
138140 
139
-	snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
140
-		&i2s->capture_dma_data);
141
+	snd_soc_dai_init_dma_data(
142
+		dai,
143
+		i2s->has_playback ? &i2s->playback_dma_data : NULL,
144
+		i2s->has_capture  ? &i2s->capture_dma_data  : NULL);
141145 
142146 	return 0;
143147 }
....@@ -151,18 +155,6 @@
151155 
152156 static struct snd_soc_dai_driver axi_i2s_dai = {
153157 	.probe = axi_i2s_dai_probe,
154
-	.playback = {
155
-		.channels_min = 2,
156
-		.channels_max = 2,
157
-		.rates = SNDRV_PCM_RATE_KNOT,
158
-		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE,
159
-	},
160
-	.capture = {
161
-		.channels_min = 2,
162
-		.channels_max = 2,
163
-		.rates = SNDRV_PCM_RATE_KNOT,
164
-		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE,
165
-	},
166158 	.ops = &axi_i2s_dai_ops,
167159 	.symmetric_rates = 1,
168160 };
....@@ -178,6 +170,19 @@
178170 	.max_register = AXI_I2S_REG_STATUS,
179171 };
180172 
173
+static void axi_i2s_parse_of(struct axi_i2s *i2s, const struct device_node *np)
174
+{
175
+	struct property *dma_names;
176
+	const char *dma_name;
177
+
178
+	of_property_for_each_string(np, "dma-names", dma_names, dma_name) {
179
+		if (strcmp(dma_name, "rx") == 0)
180
+			i2s->has_capture = true;
181
+		if (strcmp(dma_name, "tx") == 0)
182
+			i2s->has_playback = true;
183
+	}
184
+}
185
+
181186 static int axi_i2s_probe(struct platform_device *pdev)
182187 {
183188 	struct resource *res;
....@@ -190,6 +195,8 @@
190195 		return -ENOMEM;
191196 
192197 	platform_set_drvdata(pdev, i2s);
198
+
199
+	axi_i2s_parse_of(i2s, pdev->dev.of_node);
193200 
194201 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
195202 	base = devm_ioremap_resource(&pdev->dev, res);
....@@ -213,13 +220,29 @@
213220 	if (ret)
214221 		return ret;
215222 
216
-	i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO;
217
-	i2s->playback_dma_data.addr_width = 4;
218
-	i2s->playback_dma_data.maxburst = 1;
223
+	if (i2s->has_playback) {
224
+		axi_i2s_dai.playback.channels_min = 2;
225
+		axi_i2s_dai.playback.channels_max = 2;
226
+		axi_i2s_dai.playback.rates = SNDRV_PCM_RATE_KNOT;
227
+		axi_i2s_dai.playback.formats =
228
+			SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
219229 
220
-	i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO;
221
-	i2s->capture_dma_data.addr_width = 4;
222
-	i2s->capture_dma_data.maxburst = 1;
230
+		i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO;
231
+		i2s->playback_dma_data.addr_width = 4;
232
+		i2s->playback_dma_data.maxburst = 1;
233
+	}
234
+
235
+	if (i2s->has_capture) {
236
+		axi_i2s_dai.capture.channels_min = 2;
237
+		axi_i2s_dai.capture.channels_max = 2;
238
+		axi_i2s_dai.capture.rates = SNDRV_PCM_RATE_KNOT;
239
+		axi_i2s_dai.capture.formats =
240
+			SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
241
+
242
+		i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO;
243
+		i2s->capture_dma_data.addr_width = 4;
244
+		i2s->capture_dma_data.maxburst = 1;
245
+	}
223246 
224247 	i2s->ratnum.num = clk_get_rate(i2s->clk_ref) / 2 / AXI_I2S_BITS_PER_FRAME;
225248 	i2s->ratnum.den_step = 1;
....@@ -240,6 +263,10 @@
240263 	if (ret)
241264 		goto err_clk_disable;
242265 
266
+	dev_info(&pdev->dev, "probed, capture %s, playback %s\n",
267
+		 i2s->has_capture ? "enabled" : "disabled",
268
+		 i2s->has_playback ? "enabled" : "disabled");
269
+
243270 	return 0;
244271 
245272 err_clk_disable: