---

yaml
---
r: 305550
b: refs/heads/master
c: 60aae8d
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f19493a3d25ddf3ac7f27d846d54e95fb91af119
+refs/heads/master: 60aae8da298e3ac0af07c8cdb6a98e47e8deab35

trunk/sound/soc/fsl/Kconfig

@@ -1,6 +1,9 @@
 config SND_SOC_FSL_SSI
 	tristate
 
+config SND_SOC_FSL_UTILS
+	tristate
+
 menuconfig SND_POWERPC_SOC
 	tristate "SoC Audio for Freescale PowerPC CPUs"
 	depends on FSL_SOC
@@ -26,6 +29,7 @@ config SND_SOC_MPC8610_HPCD
 	# I2C is necessary for the CS4270 driver
 	depends on MPC8610_HPCD && I2C
 	select SND_SOC_FSL_SSI
+	select SND_SOC_FSL_UTILS
 	select SND_SOC_POWERPC_DMA
 	select SND_SOC_CS4270
 	select SND_SOC_CS4270_VD33_ERRATA
@@ -38,6 +42,7 @@ config SND_SOC_P1022_DS
 	# I2C is necessary for the WM8776 driver
 	depends on P1022_DS && I2C
 	select SND_SOC_FSL_SSI
+	select SND_SOC_FSL_UTILS
 	select SND_SOC_POWERPC_DMA
 	select SND_SOC_WM8776
 	default y if P1022_DS

trunk/sound/soc/fsl/Makefile

@@ -8,8 +8,10 @@ obj-$(CONFIG_SND_SOC_P1022_DS) += snd-soc-p1022-ds.o
 
 # Freescale PowerPC SSI/DMA Platform Support
 snd-soc-fsl-ssi-objs := fsl_ssi.o
+snd-soc-fsl-utils-objs := fsl_utils.o
 snd-soc-fsl-dma-objs := fsl_dma.o
 obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o
+obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o
 obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o
 
 # MPC5200 Platform Support

trunk/sound/soc/fsl/fsl_utils.c

@@ -0,0 +1,135 @@
+/**
+ * Freescale ALSA SoC Machine driver utility
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_i2c.h>
+#include <sound/soc.h>
+
+#include "fsl_utils.h"
+
+/**
+ * fsl_asoc_get_codec_dev_name - determine the dev_name for a codec node
+ *
+ * @np: pointer to the I2C device tree node
+ * @buf: buffer to be filled with the dev_name of the I2C device
+ * @len: the length of the buffer
+ *
+ * This function determines the dev_name for an I2C node.  This is the name
+ * that would be returned by dev_name() if this device_node were part of a
+ * 'struct device'  It's ugly and hackish, but it works.
+ *
+ * The dev_name for such devices include the bus number and I2C address. For
+ * example, "cs4270.0-004f".
+ */
+int fsl_asoc_get_codec_dev_name(struct device_node *np, char *buf, size_t len)
+{
+	const u32 *iprop;
+	u32 addr;
+	char temp[DAI_NAME_SIZE];
+	struct i2c_client *i2c;
+
+	of_modalias_node(np, temp, DAI_NAME_SIZE);
+
+	iprop = of_get_property(np, "reg", NULL);
+	if (!iprop)
+		return -EINVAL;
+
+	addr = be32_to_cpup(iprop);
+
+	/* We need the adapter number */
+	i2c = of_find_i2c_device_by_node(np);
+	if (!i2c) {
+		put_device(&i2c->dev);
+		return -ENODEV;
+	}
+
+	snprintf(buf, len, "%s.%u-%04x", temp, i2c->adapter->nr, addr);
+	put_device(&i2c->dev);
+
+	return 0;
+}
+EXPORT_SYMBOL(fsl_asoc_get_codec_dev_name);
+
+/**
+ * fsl_asoc_get_dma_channel - determine the dma channel for a SSI node
+ *
+ * @ssi_np: pointer to the SSI device tree node
+ * @name: name of the phandle pointing to the dma channel
+ * @dai: ASoC DAI link pointer to be filled with platform_name
+ * @dma_channel_id: dma channel id to be returned
+ * @dma_id: dma id to be returned
+ *
+ * This function determines the dma and channel id for given SSI node.  It
+ * also discovers the platform_name for the ASoC DAI link.
+ */
+int fsl_asoc_get_dma_channel(struct device_node *ssi_np,
+			     const char *name,
+			     struct snd_soc_dai_link *dai,
+			     unsigned int *dma_channel_id,
+			     unsigned int *dma_id)
+{
+	struct resource res;
+	struct device_node *dma_channel_np, *dma_np;
+	const u32 *iprop;
+	int ret;
+
+	dma_channel_np = of_parse_phandle(ssi_np, name, 0);
+	if (!dma_channel_np)
+		return -EINVAL;
+
+	if (!of_device_is_compatible(dma_channel_np, "fsl,ssi-dma-channel")) {
+		of_node_put(dma_channel_np);
+		return -EINVAL;
+	}
+
+	/* Determine the dev_name for the device_node.  This code mimics the
+	 * behavior of of_device_make_bus_id(). We need this because ASoC uses
+	 * the dev_name() of the device to match the platform (DMA) device with
+	 * the CPU (SSI) device.  It's all ugly and hackish, but it works (for
+	 * now).
+	 *
+	 * dai->platform name should already point to an allocated buffer.
+	 */
+	ret = of_address_to_resource(dma_channel_np, 0, &res);
+	if (ret) {
+		of_node_put(dma_channel_np);
+		return ret;
+	}
+	snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
+		 (unsigned long long) res.start, dma_channel_np->name);
+
+	iprop = of_get_property(dma_channel_np, "cell-index", NULL);
+	if (!iprop) {
+		of_node_put(dma_channel_np);
+		return -EINVAL;
+	}
+	*dma_channel_id = be32_to_cpup(iprop);
+
+	dma_np = of_get_parent(dma_channel_np);
+	iprop = of_get_property(dma_np, "cell-index", NULL);
+	if (!iprop) {
+		of_node_put(dma_np);
+		return -EINVAL;
+	}
+	*dma_id = be32_to_cpup(iprop);
+
+	of_node_put(dma_np);
+	of_node_put(dma_channel_np);
+
+	return 0;
+}
+EXPORT_SYMBOL(fsl_asoc_get_dma_channel);
+
+MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
+MODULE_DESCRIPTION("Freescale ASoC utility code");
+MODULE_LICENSE("GPL v2");

trunk/sound/soc/fsl/fsl_utils.h

@@ -0,0 +1,27 @@
+/**
+ * Freescale ALSA SoC Machine driver utility
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef _FSL_UTILS_H
+#define _FSL_UTILS_H
+
+#define DAI_NAME_SIZE	32
+
+struct snd_soc_dai_link;
+struct device_node;
+
+int fsl_asoc_get_codec_dev_name(struct device_node *np, char *buf, size_t len);
+int fsl_asoc_get_dma_channel(struct device_node *ssi_np, const char *name,
+			     struct snd_soc_dai_link *dai,
+			     unsigned int *dma_channel_id,
+			     unsigned int *dma_id);
+
+#endif /* _FSL_UTILS_H */