7 files changed, 289 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/sirf-audio-port.txt b/Documentation/devicetree/bindings/sound/sirf-audio-port.txt
new file mode 100644
index 000000000000..1f66de3c8f00
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sirf-audio-port.txt
@@ -0,0 +1,20 @@
+* SiRF SoC audio port
+
+Required properties:
+- compatible: "sirf,audio-port"
+- reg: Base address and size entries:
+- dmas: List of DMA controller phandle and DMA request line ordered pairs.
+- dma-names: Identifier string for each DMA request line in the dmas property.
+  These strings correspond 1:1 with the ordered pairs in dmas.
+
+  One of the DMA channels will be responsible for transmission (should be
+  named "tx") and one for reception (should be named "rx").
+
+Example:
+
+audioport: audioport@b0040000 {
+        compatible = "sirf,audio-port";
+        reg = <0xb0040000 0x10000>;
+        dmas = <&dmac1 3>, <&dmac1 8>;
+        dma-names = "rx", "tx";
+};
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index d62ce483a443..0060b31cc3f3 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -50,6 +50,7 @@ source "sound/soc/pxa/Kconfig"
 source "sound/soc/samsung/Kconfig"
 source "sound/soc/s6000/Kconfig"
 source "sound/soc/sh/Kconfig"
+source "sound/soc/sirf/Kconfig"
 source "sound/soc/spear/Kconfig"
 source "sound/soc/tegra/Kconfig"
+        tristate
diff --git a/sound/soc/sirf/Makefile b/sound/soc/sirf/Makefile
new file mode 100644
index 000000000000..fb012c852b28
--- /dev/null
+++ b/sound/soc/sirf/Makefile
@@ -0,0 +1,3 @@
+snd-soc-sirf-audio-port-objs := sirf-audio-port.o
+
+obj-$(CONFIG_SND_SOC_SIRF_AUDIO_PORT) += snd-soc-sirf-audio-port.o
diff --git a/sound/soc/sirf/sirf-audio-port.c b/sound/soc/sirf/sirf-audio-port.c
new file mode 100644
index 000000000000..b04a53f2b4f6
--- /dev/null
+++ b/sound/soc/sirf/sirf-audio-port.c
@@ -0,0 +1,194 @@
+/*
+ * SiRF Audio port driver
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "sirf-audio-port.h"
+
+struct sirf_audio_port {
+        struct regmap *regmap;
+        struct snd_dmaengine_dai_dma_data playback_dma_data;
+        struct snd_dmaengine_dai_dma_data capture_dma_data;
+};
+
+static void sirf_audio_port_tx_enable(struct sirf_audio_port *port)
+{
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_TXFIFO_OP,
+                AUDIO_FIFO_RESET, AUDIO_FIFO_RESET);
+        regmap_write(port->regmap, AUDIO_PORT_IC_TXFIFO_INT_MSK, 0);
+        regmap_write(port->regmap, AUDIO_PORT_IC_TXFIFO_OP, 0);
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_TXFIFO_OP,
+                AUDIO_FIFO_START, AUDIO_FIFO_START);
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_CODEC_TX_CTRL,
+                IC_TX_ENABLE, IC_TX_ENABLE);
+}
+
+static void sirf_audio_port_tx_disable(struct sirf_audio_port *port)
+{
+        regmap_write(port->regmap, AUDIO_PORT_IC_TXFIFO_OP, 0);
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_CODEC_TX_CTRL,
+                IC_TX_ENABLE, ~IC_TX_ENABLE);
+}
+
+static void sirf_audio_port_rx_enable(struct sirf_audio_port *port,
+        int channels)
+{
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_RXFIFO_OP,
+                AUDIO_FIFO_RESET, AUDIO_FIFO_RESET);
+        regmap_write(port->regmap, AUDIO_PORT_IC_RXFIFO_INT_MSK, 0);
+        regmap_write(port->regmap, AUDIO_PORT_IC_RXFIFO_OP, 0);
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_RXFIFO_OP,
+                AUDIO_FIFO_START, AUDIO_FIFO_START);
+        if (channels == 1)
+                regmap_update_bits(port->regmap, AUDIO_PORT_IC_CODEC_RX_CTRL,
+                        IC_RX_ENABLE_MONO, IC_RX_ENABLE_MONO);
+        else
+                regmap_update_bits(port->regmap, AUDIO_PORT_IC_CODEC_RX_CTRL,
+                        IC_RX_ENABLE_STEREO, IC_RX_ENABLE_STEREO);
+}
+
+static void sirf_audio_port_rx_disable(struct sirf_audio_port *port)
+{
+        regmap_update_bits(port->regmap, AUDIO_PORT_IC_CODEC_RX_CTRL,
+                        IC_RX_ENABLE_STEREO, ~IC_RX_ENABLE_STEREO);
+}
+
+static int sirf_audio_port_dai_probe(struct snd_soc_dai *dai)
+{
+        struct sirf_audio_port *port = snd_soc_dai_get_drvdata(dai);
+        snd_soc_dai_init_dma_data(dai, &port->playback_dma_data,
+                        &port->capture_dma_data);
+        return 0;
+}
+
+static int sirf_audio_port_trigger(struct snd_pcm_substream *substream, int cmd,
+        struct snd_soc_dai *dai)
+{
+        struct sirf_audio_port *port = snd_soc_dai_get_drvdata(dai);
+        int playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
+        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+                if (playback)
+                        sirf_audio_port_tx_disable(port);
+                else
+                        sirf_audio_port_rx_disable(port);
+                break;
+        case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
+        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+                if (playback)
+                        sirf_audio_port_tx_enable(port);
+                else
+                        sirf_audio_port_rx_enable(port,
+                                substream->runtime->channels);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static const struct snd_soc_dai_ops sirf_audio_port_dai_ops = {
+        .trigger = sirf_audio_port_trigger,
+};
+
+static struct snd_soc_dai_driver sirf_audio_port_dai = {
+        .probe = sirf_audio_port_dai_probe,
+        .name = "sirf-audio-port",
+        .id = 0,
+        .playback = {
+                .channels_min = 2,
+                .channels_max = 2,
+                .rates = SNDRV_PCM_RATE_48000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,
+        },
+        .capture = {
+                .channels_min = 1,
+                .channels_max = 2,
+                .rates = SNDRV_PCM_RATE_48000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,
+        },
+        .ops = &sirf_audio_port_dai_ops,
+};
+
+static const struct snd_soc_component_driver sirf_audio_port_component = {
+        .name       = "sirf-audio-port",
+};
+
+static const struct regmap_config sirf_audio_port_regmap_config = {
+        .reg_bits = 32,
+        .reg_stride = 4,
+        .val_bits = 32,
+        .max_register = AUDIO_PORT_IC_RXFIFO_INT_MSK,
+        .cache_type = REGCACHE_NONE,
+};
+
+static int sirf_audio_port_probe(struct platform_device *pdev)
+{
+        int ret;
+        struct sirf_audio_port *port;
+        void __iomem *base;
+        struct resource *mem_res;
+
+        port = devm_kzalloc(&pdev->dev,
+                        sizeof(struct sirf_audio_port), GFP_KERNEL);
+        if (!port)
+                return -ENOMEM;
+
+        mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!mem_res) {
+                dev_err(&pdev->dev, "no mem resource?\n");
+                return -ENODEV;
+        }
+
+        base = devm_ioremap(&pdev->dev, mem_res->start,
+                        resource_size(mem_res));
+        if (base == NULL)
+                return -ENOMEM;
+
+        port->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+                                            &sirf_audio_port_regmap_config);
+        if (IS_ERR(port->regmap))
+                return PTR_ERR(port->regmap);
+
+        ret = devm_snd_soc_register_component(&pdev->dev,
+                        &sirf_audio_port_component, &sirf_audio_port_dai, 1);
+        if (ret)
+                return ret;
+
+        platform_set_drvdata(pdev, port);
+        return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+}
+
+static const struct of_device_id sirf_audio_port_of_match[] = {
+        { .compatible = "sirf,audio-port", },
+        {}
+};
+MODULE_DEVICE_TABLE(of, sirf_audio_port_of_match);
+
+static struct platform_driver sirf_audio_port_driver = {
+        .driver = {
+                .name = "sirf-audio-port",
+                .owner = THIS_MODULE,
+                .of_match_table = sirf_audio_port_of_match,
+        },
+        .probe = sirf_audio_port_probe,
+};
+
+module_platform_driver(sirf_audio_port_driver);
+
+MODULE_DESCRIPTION("SiRF Audio Port driver");
+MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/sirf/sirf-audio-port.h b/sound/soc/sirf/sirf-audio-port.h
new file mode 100644
index 000000000000..f32dc54f4499
--- /dev/null
+++ b/sound/soc/sirf/sirf-audio-port.h
@@ -0,0 +1,62 @@
+/*
+ * SiRF Audio port controllers define
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#ifndef _SIRF_AUDIO_PORT_H
+#define _SIRF_AUDIO_PORT_H
+
+#define AUDIO_PORT_TX_FIFO_LEVEL_CHECK_MASK     0x3F
+#define AUDIO_PORT_TX_FIFO_SC_OFFSET    0
+#define AUDIO_PORT_TX_FIFO_LC_OFFSET    10
+#define AUDIO_PORT_TX_FIFO_HC_OFFSET    20
+
+#define TX_FIFO_SC(x)           (((x) & AUDIO_PORT_TX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_TX_FIFO_SC_OFFSET)
+#define TX_FIFO_LC(x)           (((x) & AUDIO_PORT_TX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_TX_FIFO_LC_OFFSET)
+#define TX_FIFO_HC(x)           (((x) & AUDIO_PORT_TX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_TX_FIFO_HC_OFFSET)
+
+#define AUDIO_PORT_RX_FIFO_LEVEL_CHECK_MASK     0x0F
+#define AUDIO_PORT_RX_FIFO_SC_OFFSET    0
+#define AUDIO_PORT_RX_FIFO_LC_OFFSET    10
+#define AUDIO_PORT_RX_FIFO_HC_OFFSET    20
+
+#define RX_FIFO_SC(x)           (((x) & AUDIO_PORT_RX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_RX_FIFO_SC_OFFSET)
+#define RX_FIFO_LC(x)           (((x) & AUDIO_PORT_RX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_RX_FIFO_LC_OFFSET)
+#define RX_FIFO_HC(x)           (((x) & AUDIO_PORT_RX_FIFO_LEVEL_CHECK_MASK) \
+                                << AUDIO_PORT_RX_FIFO_HC_OFFSET)
+#define AUDIO_PORT_IC_CODEC_TX_CTRL             (0x00F4)
+#define AUDIO_PORT_IC_CODEC_RX_CTRL             (0x00F8)
+
+#define AUDIO_PORT_IC_TXFIFO_OP                 (0x00FC)
+#define AUDIO_PORT_IC_TXFIFO_LEV_CHK            (0x0100)
+#define AUDIO_PORT_IC_TXFIFO_STS                (0x0104)
+#define AUDIO_PORT_IC_TXFIFO_INT                (0x0108)
+#define AUDIO_PORT_IC_TXFIFO_INT_MSK            (0x010C)
+
+#define AUDIO_PORT_IC_RXFIFO_OP                 (0x0110)
+#define AUDIO_PORT_IC_RXFIFO_LEV_CHK            (0x0114)
+#define AUDIO_PORT_IC_RXFIFO_STS                (0x0118)
+#define AUDIO_PORT_IC_RXFIFO_INT                (0x011C)
+#define AUDIO_PORT_IC_RXFIFO_INT_MSK            (0x0120)
+
+#define AUDIO_FIFO_START                (1 << 0)
+#define AUDIO_FIFO_RESET                (1 << 1)
+
+#define AUDIO_FIFO_FULL                 (1 << 0)
+#define AUDIO_FIFO_EMPTY                (1 << 1)
+#define AUDIO_FIFO_OFLOW                (1 << 2)
+#define AUDIO_FIFO_UFLOW                (1 << 3)
+
+#define IC_TX_ENABLE            (0x03)
+#define IC_RX_ENABLE_MONO       (0x01)
+#define IC_RX_ENABLE_STEREO     (0x03)
+
+#endif /*__SIRF_AUDIO_PORT_H*/