[PATCH v3 7/8] ASoC: qcom: lpass-sc7180: Add platform driver for lpass audio

Rohit kumar
2020-07-08T05:09:36Z

From: Ajit Pandey <ajitp@codeaurora.org>

Add platform driver for configuring sc7180 lpass core I2S and
DMA configuration to support playback & capture to external codecs
connected over primary & secondary MI2S interfaces.

Signed-off-by: Ajit Pandey <ajitp@codeaurora.org>
Signed-off-by: Rohit kumar <rohkumar@qti.qualcomm.com>
---
sound/soc/qcom/Kconfig | 5 +
sound/soc/qcom/Makefile | 2 +
sound/soc/qcom/lpass-sc7180.c | 216 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 223 insertions(+)
create mode 100644 sound/soc/qcom/lpass-sc7180.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 0ea4cde..87bec7f 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -24,6 +24,11 @@ config SND_SOC_LPASS_APQ8016
select SND_SOC_LPASS_CPU
select SND_SOC_LPASS_PLATFORM

+config SND_SOC_LPASS_SC7180
+ tristate
+ select SND_SOC_LPASS_CPU
+ select SND_SOC_LPASS_PLATFORM
+
config SND_SOC_STORM
tristate "ASoC I2S support for Storm boards"
depends on SND_SOC_QCOM
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 41b2c7a..7972c94 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -4,11 +4,13 @@ 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
+snd-soc-lpass-sc7180-objs := lpass-sc7180.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
+obj-$(CONFIG_SND_SOC_LPASS_SC7180) += snd-soc-lpass-sc7180.o

# Machine
snd-soc-storm-objs := storm.o
diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
new file mode 100644
index 00000000..dd85a97
--- /dev/null
+++ b/sound/soc/qcom/lpass-sc7180.c
@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ * lpass-sc7180.c -- ALSA SoC platform-machine driver for QTi 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 <dt-bindings/sound/sc7180-lpass.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+#include "lpass-lpaif-reg.h"
+#include "lpass.h"
+
+static struct snd_soc_dai_driver sc7180_lpass_cpu_dai_driver[] = {
+ [MI2S_PRIMARY] = {
+ .id = MI2S_PRIMARY,
+ .name = "Primary MI2S",
+ .playback = {
+ .stream_name = "Primary Playback",
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ },
+ .capture = {
+ .stream_name = "Primary Capture",
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ },
+ .probe = &asoc_qcom_lpass_cpu_dai_probe,
+ .ops = &asoc_qcom_lpass_cpu_dai_ops,
+ },
+
+ [MI2S_SECONDARY] = {
+ .id = MI2S_SECONDARY,
+ .name = "Secondary MI2S",
+ .playback = {
+ .stream_name = "Secondary Playback",
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ },
+ .probe = &asoc_qcom_lpass_cpu_dai_probe,
+ .ops = &asoc_qcom_lpass_cpu_dai_ops,
+ },
+};
+
+static int sc7180_lpass_alloc_dma_channel(struct lpass_data *drvdata,
+ int direction)
+{
+ struct lpass_variant *v = drvdata->variant;
+ int chan = 0;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
+ v->rdma_channels);
+
+ if (chan >= v->rdma_channels)
+ return -EBUSY;
+ } else {
+ chan = find_next_zero_bit(&drvdata->dma_ch_bit_map,
+ v->wrdma_channel_start +
+ v->wrdma_channels,
+ v->wrdma_channel_start);
+
+ if (chan >= v->wrdma_channel_start + v->wrdma_channels)
+ return -EBUSY;
+ }
+
+ set_bit(chan, &drvdata->dma_ch_bit_map);
+
+ return chan;
+}
+
+static int sc7180_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
+{
+ clear_bit(chan, &drvdata->dma_ch_bit_map);
+
+ return 0;
+}
+
+static int sc7180_lpass_init(struct platform_device *pdev)
+{
+ struct lpass_data *drvdata = platform_get_drvdata(pdev);
+ struct lpass_variant *variant = drvdata->variant;
+ struct device *dev = &pdev->dev;
+ int ret, i;
+
+ drvdata->clks = devm_kcalloc(dev, variant->num_clks,
+ sizeof(*drvdata->clks), GFP_KERNEL);
+ drvdata->num_clks = variant->num_clks;
+
+ for (i = 0; i < drvdata->num_clks; i++)
+ drvdata->clks[i].id = variant->clk_name[i];
+
+ ret = devm_clk_bulk_get(dev, drvdata->num_clks, drvdata->clks);
+ if (ret) {
+ dev_err(dev, "Failed to get clocks %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks);
+ if (ret) {
+ dev_err(dev, "sc7180 clk_enable failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sc7180_lpass_exit(struct platform_device *pdev)
+{
+ struct lpass_data *drvdata = platform_get_drvdata(pdev);
+
+ clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
+
+ return 0;
+}
+
+static struct lpass_variant sc7180_data = {
+ .i2sctrl_reg_base = 0x1000,
+ .i2sctrl_reg_stride = 0x1000,
+ .i2s_ports = 3,
+ .irq_reg_base = 0x9000,
+ .irq_reg_stride = 0x1000,
+ .irq_ports = 3,
+ .rdma_reg_base = 0xC000,
+ .rdma_reg_stride = 0x1000,
+ .rdma_channels = 5,
+ .dmactl_audif_start = 1,
+ .wrdma_reg_base = 0x18000,
+ .wrdma_reg_stride = 0x1000,
+ .wrdma_channel_start = 5,
+ .wrdma_channels = 4,
+
+ .loopback = REG_FIELD_ID(0x1000, 17, 17, 3, 0x1000),
+ .spken = REG_FIELD_ID(0x1000, 16, 16, 3, 0x1000),
+ .spkmode = REG_FIELD_ID(0x1000, 11, 15, 3, 0x1000),
+ .spkmono = REG_FIELD_ID(0x1000, 10, 10, 3, 0x1000),
+ .micen = REG_FIELD_ID(0x1000, 9, 9, 3, 0x1000),
+ .micmode = REG_FIELD_ID(0x1000, 4, 8, 3, 0x1000),
+ .micmono = REG_FIELD_ID(0x1000, 3, 3, 3, 0x1000),
+ .wssrc = REG_FIELD_ID(0x1000, 2, 2, 3, 0x1000),
+ .bitwidth = REG_FIELD_ID(0x1000, 0, 0, 3, 0x1000),
+
+ .rdma_dyncclk = REG_FIELD_ID(0xC000, 21, 21, 5, 0x1000),
+ .rdma_bursten = REG_FIELD_ID(0xC000, 20, 20, 5, 0x1000),
+ .rdma_wpscnt = REG_FIELD_ID(0xC000, 16, 19, 5, 0x1000),
+ .rdma_intf = REG_FIELD_ID(0xC000, 12, 15, 5, 0x1000),
+ .rdma_fifowm = REG_FIELD_ID(0xC000, 1, 5, 5, 0x1000),
+ .rdma_enable = REG_FIELD_ID(0xC000, 0, 0, 5, 0x1000),
+
+ .wrdma_dyncclk = REG_FIELD_ID(0x18000, 22, 22, 4, 0x1000),
+ .wrdma_bursten = REG_FIELD_ID(0x18000, 21, 21, 4, 0x1000),
+ .wrdma_wpscnt = REG_FIELD_ID(0x18000, 17, 20, 4, 0x1000),
+ .wrdma_intf = REG_FIELD_ID(0x18000, 12, 16, 4, 0x1000),
+ .wrdma_fifowm = REG_FIELD_ID(0x18000, 1, 5, 4, 0x1000),
+ .wrdma_enable = REG_FIELD_ID(0x18000, 0, 0, 4, 0x1000),
+
+ .clk_name = (const char*[]) {
+ "noc",
+ "audio-core",
+ "sysnoc_mport",
+ },
+ .num_clks = 3,
+ .dai_driver = sc7180_lpass_cpu_dai_driver,
+ .num_dai = ARRAY_SIZE(sc7180_lpass_cpu_dai_driver),
+ .dai_osr_clk_names = (const char *[]) {
+ "mclk0",
+ "null",
+ },
+ .dai_bit_clk_names = (const char *[]) {
+ "pri_ibit",
+ "sec_ibit",
+ },
+ .init = sc7180_lpass_init,
+ .exit = sc7180_lpass_exit,
+ .alloc_dma_channel = sc7180_lpass_alloc_dma_channel,
+ .free_dma_channel = sc7180_lpass_free_dma_channel,
+};
+
+static const struct of_device_id sc7180_lpass_cpu_device_id[] = {
+ {.compatible = "qcom,lpass-cpu-sc7180", .data = &sc7180_data},
+ {}
+};
+
+static struct platform_driver sc7180_lpass_cpu_platform_driver = {
+ .driver = {
+ .name = "sc7180-lpass-cpu",
+ .of_match_table = of_match_ptr(sc7180_lpass_cpu_device_id),
+ },
+ .probe = asoc_qcom_lpass_cpu_platform_probe,
+ .remove = asoc_qcom_lpass_cpu_platform_probe,
+};
+
+module_platform_driver(sc7180_lpass_cpu_platform_driver);
+
+MODULE_DESCRIPTION("SC7180 LPASS CPU DRIVER");
+MODULE_LICENSE("GPL v2");
--
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