[RFC PATCH 11/14] ASoC: qcom: Add apq8016 lpass driver support

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

This patch adds apq8016 lpass driver support. APQ8016 has 4 MI2S which
can be routed to one internal codec and 2 external codec interfaces.

Primary, Secondary, Quaternary I2S can do Rx(playback) and Tertiary and
Quaternary can do Tx(capture).

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/Kconfig         |   7 ++
 sound/soc/qcom/Makefile        |   2 +
 sound/soc/qcom/lpass-apq8016.c | 243 +++++++++++++++++++++++++++++++++++++++++
 sound/soc/qcom/lpass.h         |   4 +
 4 files changed, 256 insertions(+)
 create mode 100644 sound/soc/qcom/lpass-apq8016.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index ba87e9b..2a06d1e 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -20,6 +20,13 @@ config SND_SOC_LPASS_IPQ806X
 	select SND_SOC_LPASS_CPU
 	select SND_SOC_LPASS_PLATFORM
 
+config SND_SOC_LPASS_APQ8016
+	tristate
+	depends on SND_SOC_QCOM
+	select SND_SOC_LPASS_CPU
+	select SND_SOC_LPASS_PLATFORM
+
+
 config SND_SOC_STORM
 	tristate "ASoC I2S support for Storm boards"
 	depends on (ARCH_QCOM && SND_SOC_QCOM) || COMPILE_TEST
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index f8aab91..ac76308 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -2,10 +2,12 @@
 snd-soc-lpass-cpu-objs := lpass-cpu.o
 snd-soc-lpass-platform-objs := lpass-platform.o
 snd-soc-lpass-ipq806x-objs := lpass-ipq806x.o
+snd-soc-lpass-apq8016-objs := lpass-apq8016.o
 
 obj-$(CONFIG_SND_SOC_LPASS_CPU) += snd-soc-lpass-cpu.o
 obj-$(CONFIG_SND_SOC_LPASS_PLATFORM) += snd-soc-lpass-platform.o
 obj-$(CONFIG_SND_SOC_LPASS_IPQ806X) += snd-soc-lpass-ipq806x.o
+obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
 
 # Machine
 snd-soc-storm-objs := storm.o
diff --git a/sound/soc/qcom/lpass-apq8016.c b/sound/soc/qcom/lpass-apq8016.c
new file mode 100644
index 0000000..8e545e0
--- /dev/null
+++ b/sound/soc/qcom/lpass-apq8016.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * lpass-apq8016.c -- ALSA SoC CPU DAI driver for APQ8016 LPASS
+ *
+ */
+
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include <dt-bindings/sound/apq8016-lpass.h>
+#include "lpass-lpaif-reg.h"
+#include "lpass.h"
+
+static struct snd_soc_dai_driver apq8016_lpass_cpu_dai_driver[] = {
+	[MI2S_PRIMARY] =  {
+		.id = MI2S_PRIMARY,
+		.name = "Primary MI2S",
+		.playback = {
+			.stream_name	= "Primary Playback",
+			.formats	= SNDRV_PCM_FMTBIT_S16 |
+						SNDRV_PCM_FMTBIT_S24 |
+						SNDRV_PCM_FMTBIT_S32,
+			.rates		= SNDRV_PCM_RATE_8000 |
+						SNDRV_PCM_RATE_16000 |
+						SNDRV_PCM_RATE_32000 |
+						SNDRV_PCM_RATE_48000 |
+						SNDRV_PCM_RATE_96000,
+			.rate_min	= 8000,
+			.rate_max	= 96000,
+			.channels_min	= 1,
+			.channels_max	= 8,
+		},
+		.probe	= &lpass_cpu_dai_probe,
+		.ops    = &lpass_cpu_dai_ops,
+	},
+	[MI2S_SECONDARY] =  {
+		.id = MI2S_SECONDARY,
+		.name = "Secondary MI2S",
+		.playback = {
+			.stream_name	= "Secondary Playback",
+			.formats	= SNDRV_PCM_FMTBIT_S16 |
+						SNDRV_PCM_FMTBIT_S24 |
+						SNDRV_PCM_FMTBIT_S32,
+			.rates		= SNDRV_PCM_RATE_8000 |
+						SNDRV_PCM_RATE_16000 |
+						SNDRV_PCM_RATE_32000 |
+						SNDRV_PCM_RATE_48000 |
+						SNDRV_PCM_RATE_96000,
+			.rate_min	= 8000,
+			.rate_max	= 96000,
+			.channels_min	= 1,
+			.channels_max	= 8,
+		},
+		.probe	= &lpass_cpu_dai_probe,
+		.ops    = &lpass_cpu_dai_ops,
+	},
+	[MI2S_TERTIARY] =  {
+		.id = MI2S_TERTIARY,
+		.name = "Tertiary MI2S",
+		.capture = {
+			.stream_name	= "Tertiary Capture",
+			.formats	= SNDRV_PCM_FMTBIT_S16 |
+						SNDRV_PCM_FMTBIT_S24 |
+						SNDRV_PCM_FMTBIT_S32,
+			.rates		= SNDRV_PCM_RATE_8000 |
+						SNDRV_PCM_RATE_16000 |
+						SNDRV_PCM_RATE_32000 |
+						SNDRV_PCM_RATE_48000 |
+						SNDRV_PCM_RATE_96000,
+			.rate_min	= 8000,
+			.rate_max	= 96000,
+			.channels_min	= 1,
+			.channels_max	= 8,
+		},
+		.probe	= &lpass_cpu_dai_probe,
+		.ops    = &lpass_cpu_dai_ops,
+	},
+	[MI2S_QUATERNARY] =  {
+		.id = MI2S_QUATERNARY,
+		.name = "Quatenary MI2S",
+		.playback = {
+			.stream_name	= "Quatenary Playback",
+			.formats	= SNDRV_PCM_FMTBIT_S16 |
+						SNDRV_PCM_FMTBIT_S24 |
+						SNDRV_PCM_FMTBIT_S32,
+			.rates		= SNDRV_PCM_RATE_8000 |
+						SNDRV_PCM_RATE_16000 |
+						SNDRV_PCM_RATE_32000 |
+						SNDRV_PCM_RATE_48000 |
+						SNDRV_PCM_RATE_96000,
+			.rate_min	= 8000,
+			.rate_max	= 96000,
+			.channels_min	= 1,
+			.channels_max	= 8,
+		},
+		.capture = {
+			.stream_name	= "Quatenary Capture",
+			.formats	= SNDRV_PCM_FMTBIT_S16 |
+						SNDRV_PCM_FMTBIT_S24 |
+						SNDRV_PCM_FMTBIT_S32,
+			.rates		= SNDRV_PCM_RATE_8000 |
+						SNDRV_PCM_RATE_16000 |
+						SNDRV_PCM_RATE_32000 |
+						SNDRV_PCM_RATE_48000 |
+						SNDRV_PCM_RATE_96000,
+			.rate_min	= 8000,
+			.rate_max	= 96000,
+			.channels_min	= 1,
+			.channels_max	= 8,
+		},
+		.probe	= &lpass_cpu_dai_probe,
+		.ops    = &lpass_cpu_dai_ops,
+	},
+};
+
+static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata)
+{
+	struct lpass_variant *v = drvdata->variant;
+	int chan = find_first_zero_bit(&drvdata->rdma_ch_bit_map,
+					v->rdma_channels);
+
+	if (chan >= v->rdma_channels)
+		return -EBUSY;
+
+	set_bit(chan, &drvdata->rdma_ch_bit_map);
+
+	return chan;
+}
+
+static int apq8016_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
+{
+	clear_bit(chan, &drvdata->rdma_ch_bit_map);
+
+	return 0;
+}
+
+static int apq8016_lpass_init(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata = platform_get_drvdata(pdev);
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	drvdata->pcnoc_mport_clk = of_clk_get_by_name(np, "pcnoc-mport-clk");
+	if (IS_ERR(drvdata->pcnoc_mport_clk)) {
+		dev_err(&pdev->dev, "%s() error getting pcnoc-mport-clk: %ld\n",
+				__func__, PTR_ERR(drvdata->pcnoc_mport_clk));
+		return PTR_ERR(drvdata->pcnoc_mport_clk);
+	}
+
+	ret = clk_prepare_enable(drvdata->pcnoc_mport_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "%s() Error enabling ahbix_clk: %d\n",
+				__func__, ret);
+		return ret;
+	}
+
+	drvdata->pcnoc_sway_clk = of_clk_get_by_name(np, "pcnoc-sway-clk");
+	if (IS_ERR(drvdata->pcnoc_sway_clk)) {
+		dev_err(&pdev->dev, "%s() error getting pcnoc-sway-clk: %ld\n",
+				__func__, PTR_ERR(drvdata->pcnoc_sway_clk));
+		return PTR_ERR(drvdata->pcnoc_sway_clk);
+	}
+
+	ret = clk_prepare_enable(drvdata->pcnoc_sway_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "%s() Error enabling ahbix_clk: %d\n",
+				__func__, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int apq8016_lpass_exit(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(drvdata->pcnoc_mport_clk);
+	clk_disable_unprepare(drvdata->pcnoc_sway_clk);
+
+	return 0;
+}
+
+
+struct lpass_variant apq8016_data = {
+	.i2sctrl_reg_base	= 0x1000,
+	.i2sctrl_reg_stride	= 0x1000,
+	.i2s_ports		= 4,
+	.irq_reg_base		= 0x6000,
+	.irq_reg_stride		= 0x1000,
+	.irq_ports		= 3,
+	.rdma_reg_base		= 0x8400,
+	.rdma_reg_stride	= 0x1000,
+	.rdma_channels		= 2,
+	.rdmactl_audif_start	= 1,
+	.no_osr_clk		= true,
+	.dai_driver		= apq8016_lpass_cpu_dai_driver,
+	.num_dai		= ARRAY_SIZE(apq8016_lpass_cpu_dai_driver),
+	.init			= apq8016_lpass_init,
+	.exit			= apq8016_lpass_exit,
+	.alloc_dma_channel	= apq8016_lpass_alloc_dma_channel,
+	.free_dma_channel	= apq8016_lpass_free_dma_channel,
+};
+
+static const struct of_device_id apq8016_lpass_cpu_device_id[] = {
+	{ .compatible = "qcom,lpass-cpu-apq8016", .data = &apq8016_data },
+	{}
+};
+MODULE_DEVICE_TABLE(of, apq8016_lpass_cpu_device_id);
+
+static struct platform_driver lpass_cpu_platform_driver = {
+	.driver	= {
+		.name		= "apq8016-lpass-cpu",
+		.of_match_table	= of_match_ptr(apq8016_lpass_cpu_device_id),
+	},
+	.probe	= lpass_cpu_platform_probe,
+	.remove	= lpass_cpu_platform_remove,
+};
+module_platform_driver(lpass_cpu_platform_driver);
+
+MODULE_DESCRIPTION("APQ8016 LPASS CPU Driver");
+MODULE_LICENSE("GPL v2");
+
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index 82708d1..3346080 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -54,6 +54,10 @@ struct lpass_data {
 
 	/* used it for handling interrupt per dma channel */
 	struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
+
+	/* 8016 specific */
+	struct clk *pcnoc_mport_clk;
+	struct clk *pcnoc_sway_clk;
 };
 
 /* Vairant data per each SOC */
-- 
1.9.1