Message-Id: <1635838265-27346-10-git-send-email-srivasam@codeaurora.org>
Date:   Tue,  2 Nov 2021 13:01:04 +0530
From:   Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, rohitkr@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, judyhsiao@...omium.org
Cc:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: [PATCH v4 09/10] ASoC: qcom: lpass-sc7280: Add platform driver for lpass audio

Add platform driver for configuring sc7280 lpass core I2S and
DMA configuration to support playback & capture to external codecs
connected over secondary MI2S interface and soundwire interface.

Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Co-developed-by: Venkata Prasad Potturu <potturu@...eaurora.org>
Signed-off-by: Venkata Prasad Potturu <potturu@...eaurora.org>
---
 sound/soc/qcom/lpass-sc7280.c | 417 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 417 insertions(+)
 create mode 100644 sound/soc/qcom/lpass-sc7280.c

diff --git a/sound/soc/qcom/lpass-sc7280.c b/sound/soc/qcom/lpass-sc7280.c
new file mode 100644
index 0000000..3c6c5eb
--- /dev/null
+++ b/sound/soc/qcom/lpass-sc7280.c
@@ -0,0 +1,417 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
+ *
+ * lpass-sc7180.c -- ALSA SoC platform-machine driver for QTi LPASS
+ */
+
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+
+#include <dt-bindings/sound/sc7180-lpass.h>
+
+#include "lpass-lpaif-reg.h"
+#include "lpass.h"
+
+static struct snd_soc_dai_driver sc7280_lpass_cpu_dai_driver[] = {
+	{
+		.id = LPASS_CDC_DMA_RX0,
+		.name = "CDC DMA RX",
+		.playback = {
+			.stream_name = "WCD Playback",
+			.formats		= SNDRV_PCM_FMTBIT_S16,
+			.rates = SNDRV_PCM_RATE_48000,
+			.rate_min		= 48000,
+			.rate_max		= 48000,
+			.channels_min	= 2,
+			.channels_max	= 2,
+		},
+		.ops	= &asoc_qcom_lpass_wcd_dai_ops,
+	},
+	{
+		.id = LPASS_CDC_DMA_TX3,
+		.name = "CDC DMA TX",
+		.capture = {
+			.stream_name = "WCD Capture",
+			.formats = SNDRV_PCM_FMTBIT_S16,
+			.rates = SNDRV_PCM_RATE_48000,
+			.rate_min		= 48000,
+			.rate_max		= 48000,
+			.channels_min	= 1,
+			.channels_max	= 2,
+		},
+		.ops	= &asoc_qcom_lpass_wcd_dai_ops,
+	},
+
+	{
+		.id = MI2S_SECONDARY,
+		.name = "Secondary MI2S",
+		.playback = {
+			.stream_name = "Secondary MI2S 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,
+	},
+	{
+		.id = LPASS_DP_RX,
+		.name = "Hdmi",
+		.playback = {
+			.stream_name = "DP Playback",
+			.formats		= SNDRV_PCM_FMTBIT_S24,
+			.rates = SNDRV_PCM_RATE_48000,
+			.rate_min		= 48000,
+			.rate_max		= 48000,
+			.channels_min	= 2,
+			.channels_max	= 2,
+		},
+		.ops	= &asoc_qcom_lpass_hdmi_dai_ops,
+	},
+	{
+		.id = LPASS_CDC_DMA_VA_TX0,
+		.name = "CDC DMA VA",
+		.capture = {
+			.stream_name = "DMIC Capture",
+			.formats = SNDRV_PCM_FMTBIT_S16,
+			.rates = SNDRV_PCM_RATE_48000,
+			.rate_min	= 48000,
+			.rate_max	= 48000,
+			.channels_min	= 2,
+			.channels_max	= 4,
+		},
+		.ops	= &asoc_qcom_lpass_wcd_dai_ops,
+	},
+};
+
+static int sc7280_lpass_alloc_dma_channel(struct lpass_data *drvdata,
+				int direction, unsigned int dai_id)
+{
+	struct lpass_variant *v = drvdata->variant;
+	int chan = 0;
+
+	if (dai_id == LPASS_CDC_DMA_RX0 ||
+	dai_id == LPASS_CDC_DMA_TX3) {
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+			chan = find_first_zero_bit(&drvdata->rxtx_dma_ch_bit_map,
+									v->rxtx_rdma_channels);
+
+			if (chan >= v->rxtx_rdma_channels)
+				return -EBUSY;
+		} else {
+			chan = find_next_zero_bit(&drvdata->rxtx_dma_ch_bit_map,
+							v->rxtx_wrdma_channel_start +
+							v->rxtx_wrdma_channels,
+							v->rxtx_wrdma_channel_start);
+
+			if (chan >=	 v->rxtx_wrdma_channel_start + v->rxtx_wrdma_channels)
+				return -EBUSY;
+		}
+
+		set_bit(chan, &drvdata->rxtx_dma_ch_bit_map);
+	} else if (dai_id == LPASS_CDC_DMA_VA_TX0) {
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+			chan = find_first_zero_bit(&drvdata->va_dma_ch_bit_map,
+									v->va_rdma_channels);
+
+			if (chan >= v->va_rdma_channels)
+				return -EBUSY;
+		} else {
+			chan = find_next_zero_bit(&drvdata->va_dma_ch_bit_map,
+							v->va_wrdma_channel_start +
+							v->va_wrdma_channels,
+							v->va_wrdma_channel_start);
+
+			if (chan >=	 v->va_wrdma_channel_start + v->va_wrdma_channels)
+				return -EBUSY;
+		}
+
+		set_bit(chan, &drvdata->va_dma_ch_bit_map);
+	} else if (dai_id == LPASS_DP_RX) {
+		if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+			chan = find_first_zero_bit(&drvdata->hdmi_dma_ch_bit_map,
+									v->hdmi_rdma_channels);
+
+			if (chan >= v->hdmi_rdma_channels)
+				return -EBUSY;
+		}
+		set_bit(chan, &drvdata->hdmi_dma_ch_bit_map);
+	} else {
+		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 sc7280_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
+{
+	if (dai_id == LPASS_CDC_DMA_RX0 ||
+		dai_id == LPASS_CDC_DMA_TX3)
+		clear_bit(chan, &drvdata->rxtx_dma_ch_bit_map);
+	else if (dai_id == LPASS_CDC_DMA_VA_TX0)
+		clear_bit(chan, &drvdata->va_dma_ch_bit_map);
+	else if (dai_id == LPASS_DP_RX)
+		clear_bit(chan, &drvdata->hdmi_dma_ch_bit_map);
+	else
+		clear_bit(chan, &drvdata->dma_ch_bit_map);
+
+	return 0;
+}
+
+static int sc7280_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;
+
+	drvdata->clks = devm_kcalloc(dev, variant->num_clks,
+					sizeof(*drvdata->clks), GFP_KERNEL);
+	drvdata->num_clks = variant->num_clks;
+
+	drvdata->aon_cc_audio_hm_h = devm_clk_get(dev, "lpass_aon_cc_audio_hm_h_clk");
+	if (IS_ERR(drvdata->aon_cc_audio_hm_h))
+		return PTR_ERR(drvdata->aon_cc_audio_hm_h);
+	drvdata->core_cc_sysnoc_mport_core = devm_clk_get(dev,
+					"lpass_core_cc_sysnoc_mport_core_clk");
+	if (IS_ERR(drvdata->core_cc_sysnoc_mport_core))
+		return PTR_ERR(drvdata->core_cc_sysnoc_mport_core);
+
+	clk_prepare_enable(drvdata->aon_cc_audio_hm_h);
+	clk_prepare_enable(drvdata->core_cc_sysnoc_mport_core);
+	return 0;
+}
+
+static int sc7280_lpass_exit(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(drvdata->core_cc_sysnoc_mport_core);
+	clk_disable_unprepare(drvdata->aon_cc_audio_hm_h);
+
+	return 0;
+}
+
+static struct lpass_variant sc7280_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,
+	.rxtx_rdma_reg_base		= 0xC000,
+	.rxtx_rdma_reg_stride		= 0x1000,
+	.rxtx_rdma_channels		= 8,
+	.hdmi_rdma_reg_base		= 0x64000,
+	.hdmi_rdma_reg_stride		= 0x1000,
+	.hdmi_rdma_channels		= 4,
+	.dmactl_audif_start		= 1,
+	.wrdma_reg_base			= 0x18000,
+	.wrdma_reg_stride		= 0x1000,
+	.wrdma_channel_start		= 5,
+	.wrdma_channels			= 4,
+	.rxtx_irq_reg_base		= 0x9000,
+	.rxtx_irq_reg_stride		= 0x1000,
+	.rxtx_irq_ports			= 3,
+	.rxtx_wrdma_reg_base		= 0x18000,
+	.rxtx_wrdma_reg_stride		= 0x1000,
+	.rxtx_wrdma_channel_start	= 5,
+	.rxtx_wrdma_channels		= 6,
+	.va_wrdma_reg_base		= 0x18000,
+	.va_wrdma_reg_stride		= 0x1000,
+	.va_wrdma_channel_start		= 5,
+	.va_wrdma_channels		= 3,
+	.va_irq_reg_base		= 0x9000,
+	.va_irq_reg_stride		= 0x1000,
+	.va_irq_ports			= 3,
+
+	.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, 1, 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),
+
+	.rxtx_rdma_enable		= REG_FIELD_ID(0xC000, 0, 0, 7, 0x1000),
+	.rxtx_rdma_fifowm		= REG_FIELD_ID(0xC000, 1, 11, 7, 0x1000),
+	.rxtx_rdma_intf			= REG_FIELD_ID(0xC000, 12, 15, 7, 0x1000),
+	.rxtx_rdma_wpscnt		= REG_FIELD_ID(0xC000, 16, 19, 7, 0x1000),
+	.rxtx_rdma_bursten		= REG_FIELD_ID(0xC000, 20, 20, 7, 0x1000),
+	.rxtx_rdma_dyncclk		= REG_FIELD_ID(0xC000, 21, 21, 7, 0x1000),
+
+	.rxtx_rdma_codec_ch		= REG_FIELD_ID(0xC050, 0, 7, 7, 0x1000),
+	.rxtx_rdma_codec_intf		= REG_FIELD_ID(0xC050, 16, 19, 7, 0x1000),
+	.rxtx_rdma_codec_fs_delay	= REG_FIELD_ID(0xC050, 21, 24, 7, 0x1000),
+	.rxtx_rdma_codec_fs_sel		= REG_FIELD_ID(0xC050, 25, 27, 7, 0x1000),
+	.rxtx_rdma_codec_pack		= REG_FIELD_ID(0xC050, 29, 29, 5, 0x1000),
+	.rxtx_rdma_codec_enable		= REG_FIELD_ID(0xC050, 30, 30, 7, 0x1000),
+
+	.rxtx_wrdma_enable		= REG_FIELD_ID(0x18000, 0, 0, 5, 0x1000),
+	.rxtx_wrdma_fifowm		= REG_FIELD_ID(0x18000, 1, 11, 5, 0x1000),
+	.rxtx_wrdma_intf		= REG_FIELD_ID(0x18000, 12, 16, 5, 0x1000),
+	.rxtx_wrdma_wpscnt		= REG_FIELD_ID(0x18000, 17, 20, 5, 0x1000),
+	.rxtx_wrdma_bursten		= REG_FIELD_ID(0x18000, 21, 21, 5, 0x1000),
+	.rxtx_wrdma_dyncclk		= REG_FIELD_ID(0x18000, 22, 22, 5, 0x1000),
+
+	.rxtx_wrdma_codec_ch		= REG_FIELD_ID(0x18050, 0, 7, 5, 0x1000),
+	.rxtx_wrdma_codec_intf		= REG_FIELD_ID(0x18050, 16, 19, 5, 0x1000),
+	.rxtx_wrdma_codec_fs_delay	= REG_FIELD_ID(0x18050, 21, 24, 5, 0x1000),
+	.rxtx_wrdma_codec_fs_sel	= REG_FIELD_ID(0x18050, 25, 27, 5, 0x1000),
+	.rxtx_wrdma_codec_pack		= REG_FIELD_ID(0x18050, 29, 29, 5, 0x1000),
+	.rxtx_wrdma_codec_enable	= REG_FIELD_ID(0x18050, 30, 30, 5, 0x1000),
+
+	.va_wrdma_enable		= REG_FIELD_ID(0x18000, 0, 0, 5, 0x1000),
+	.va_wrdma_fifowm		= REG_FIELD_ID(0x18000, 1, 11, 5, 0x1000),
+	.va_wrdma_intf			= REG_FIELD_ID(0x18000, 12, 16, 5, 0x1000),
+	.va_wrdma_wpscnt		= REG_FIELD_ID(0x18000, 17, 20, 5, 0x1000),
+	.va_wrdma_bursten		= REG_FIELD_ID(0x18000, 21, 21, 5, 0x1000),
+	.va_wrdma_dyncclk		= REG_FIELD_ID(0x18000, 22, 22, 5, 0x1000),
+
+	.va_wrdma_codec_ch		= REG_FIELD_ID(0x18050, 0, 7, 5, 0x1000),
+	.va_wrdma_codec_intf		= REG_FIELD_ID(0x18050, 16, 19, 5, 0x1000),
+	.va_wrdma_codec_fs_delay	= REG_FIELD_ID(0x18050, 21, 24, 5, 0x1000),
+	.va_wrdma_codec_fs_sel		= REG_FIELD_ID(0x18050, 25, 27, 5, 0x1000),
+	.va_wrdma_codec_pack		= REG_FIELD_ID(0x18050, 29, 29, 5, 0x1000),
+	.va_wrdma_codec_enable		= REG_FIELD_ID(0x18050, 30, 30, 5, 0x1000),
+
+	.hdmi_tx_ctl_addr		= 0x1000,
+	.hdmi_legacy_addr		= 0x1008,
+	.hdmi_vbit_addr			= 0x610c0,
+	.hdmi_ch_lsb_addr		= 0x61048,
+	.hdmi_ch_msb_addr		= 0x6104c,
+	.ch_stride			= 0x8,
+	.hdmi_parity_addr		= 0x61034,
+	.hdmi_dmactl_addr		= 0x61038,
+	.hdmi_dma_stride		= 0x4,
+	.hdmi_DP_addr			= 0x610c8,
+	.hdmi_sstream_addr		= 0x6101c,
+	.hdmi_irq_reg_base		= 0x63000,
+	.hdmi_irq_ports			= 1,
+
+	.hdmi_rdma_dyncclk		= REG_FIELD_ID(0x64000, 14, 14, 4, 0x1000),
+	.hdmi_rdma_bursten		= REG_FIELD_ID(0x64000, 13, 13, 4, 0x1000),
+	.hdmi_rdma_burst8		= REG_FIELD_ID(0x64000, 15, 15, 4, 0x1000),
+	.hdmi_rdma_burst16		= REG_FIELD_ID(0x64000, 16, 16, 4, 0x1000),
+	.hdmi_rdma_dynburst		= REG_FIELD_ID(0x64000, 18, 18, 4, 0x1000),
+	.hdmi_rdma_wpscnt		= REG_FIELD_ID(0x64000, 10, 12, 4, 0x1000),
+	.hdmi_rdma_fifowm		= REG_FIELD_ID(0x64000, 1, 5, 4, 0x1000),
+	.hdmi_rdma_enable		= REG_FIELD_ID(0x64000, 0, 0, 4, 0x1000),
+
+	.sstream_en			= REG_FIELD(0x6101c, 0, 0),
+	.dma_sel			= REG_FIELD(0x6101c, 1, 2),
+	.auto_bbit_en			= REG_FIELD(0x6101c, 3, 3),
+	.layout				= REG_FIELD(0x6101c, 4, 4),
+	.layout_sp			= REG_FIELD(0x6101c, 5, 8),
+	.set_sp_on_en			= REG_FIELD(0x6101c, 10, 10),
+	.dp_audio			= REG_FIELD(0x6101c, 11, 11),
+	.dp_staffing_en			= REG_FIELD(0x6101c, 12, 12),
+	.dp_sp_b_hw_en			= REG_FIELD(0x6101c, 13, 13),
+
+	.mute				= REG_FIELD(0x610c8, 0, 0),
+	.as_sdp_cc			= REG_FIELD(0x610c8, 1, 3),
+	.as_sdp_ct			= REG_FIELD(0x610c8, 4, 7),
+	.aif_db4			= REG_FIELD(0x610c8, 8, 15),
+	.frequency			= REG_FIELD(0x610c8, 16, 21),
+	.mst_index			= REG_FIELD(0x610c8, 28, 29),
+	.dptx_index			= REG_FIELD(0x610c8, 30, 31),
+
+	.soft_reset			= REG_FIELD(0x1000, 31, 31),
+	.force_reset			= REG_FIELD(0x1000, 30, 30),
+
+	.use_hw_chs			= REG_FIELD(0x61038, 0, 0),
+	.use_hw_usr			= REG_FIELD(0x61038, 1, 1),
+	.hw_chs_sel			= REG_FIELD(0x61038, 2, 4),
+	.hw_usr_sel			= REG_FIELD(0x61038, 5, 6),
+
+	.replace_vbit			= REG_FIELD(0x610c0, 0, 0),
+	.vbit_stream			= REG_FIELD(0x610c0, 1, 1),
+
+	.legacy_en			=  REG_FIELD(0x1008, 0, 0),
+	.calc_en			=  REG_FIELD(0x61034, 0, 0),
+	.lsb_bits			=  REG_FIELD(0x61048, 0, 31),
+	.msb_bits			=  REG_FIELD(0x6104c, 0, 31),
+
+
+	.clk_name			= (const char*[]) {
+							"lpass_aon_cc_audio_hm_h_clk",
+							"lpass_core_cc_sysnoc_mport_core_clk"
+						},
+	.num_clks				= 2,
+	.cdc_dma_clk_names		= (const char*[]) {
+								"lpass_audio_cc_codec_mem0_clk",
+								"lpass_audio_cc_codec_mem1_clk",
+								"lpass_audio_cc_codec_mem2_clk",
+								"lpass_aon_cc_va_mem0_clk"
+							},
+	.cdc_dma_num_clks				= 4,
+	.dai_driver				= sc7280_lpass_cpu_dai_driver,
+	.num_dai				= ARRAY_SIZE(sc7280_lpass_cpu_dai_driver),
+	.dai_osr_clk_names		= (const char *[]) {
+							   "null",
+							   "null"
+							},
+	.dai_bit_clk_names		= (const char *[]) {
+								"null",
+								"lpass_core_cc_ext_if0_ibit_clk",
+								"lpass_core_cc_ext_if1_ibit_clk"
+							},
+	.init					= sc7280_lpass_init,
+	.exit					= sc7280_lpass_exit,
+	.alloc_dma_channel		= sc7280_lpass_alloc_dma_channel,
+	.free_dma_channel		= sc7280_lpass_free_dma_channel,
+};
+
+static const struct of_device_id sc7280_lpass_cpu_device_id[] = {
+	{.compatible = "qcom,sc7280-lpass-cpu", .data = &sc7280_data},
+	{}
+};
+MODULE_DEVICE_TABLE(of, sc7280_lpass_cpu_device_id);
+
+static struct platform_driver sc7280_lpass_cpu_platform_driver = {
+	.driver = {
+		.name = "sc7280-lpass-cpu",
+		.of_match_table = of_match_ptr(sc7280_lpass_cpu_device_id),
+	},
+	.probe = asoc_qcom_lpass_cpu_platform_probe,
+	.remove = asoc_qcom_lpass_cpu_platform_remove,
+	.shutdown = asoc_qcom_lpass_cpu_platform_shutdown,
+};
+
+module_platform_driver(sc7280_lpass_cpu_platform_driver);
+
+MODULE_DESCRIPTION("SC7280 LPASS CPU DRIVER");
+MODULE_LICENSE("GPL v2");
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

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