new file mode 100644
@@ -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";
+};
@@ -54,6 +54,7 @@ source "sound/soc/spear/Kconfig"
source "sound/soc/tegra/Kconfig"
source "sound/soc/txx9/Kconfig"
source "sound/soc/ux500/Kconfig"
+source "sound/soc/sirf/Kconfig"
# Supported codecs
source "sound/soc/codecs/Kconfig"
@@ -31,3 +31,4 @@ obj-$(CONFIG_SND_SOC) += spear/
obj-$(CONFIG_SND_SOC) += tegra/
obj-$(CONFIG_SND_SOC) += txx9/
obj-$(CONFIG_SND_SOC) += ux500/
+obj-$(CONFIG_SND_SOC) += sirf/
new file mode 100644
@@ -0,0 +1,9 @@
+config SND_SOC_SIRF
+ tristate "SoC Audio for the SiRF SoC chips"
+ depends on ARCH_SIRF || COMPILE_TEST
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+
+config SND_SOC_SIRF_AUDIO_PORT
+ select REGMAP_MMIO
+ tristate
+
new file mode 100644
@@ -0,0 +1,3 @@
+snd-soc-sirf-audio-port-objs := sirf-audio-port.o
+
+obj-$(CONFIG_SND_SOC_SIRF_AUDIO_PORT) += snd-soc-sirf-audio-port.o
new file mode 100644
@@ -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 inline 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 inline 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 inline 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 inline 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");
new file mode 100644
@@ -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*/