Quelle  lpass-sc7180.c   Sprache: C

// 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 <linux/pm.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[] = {
 {
  .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 |
    SNDRV_PCM_FMTBIT_S32,
   .rates = SNDRV_PCM_RATE_48000,
   .rate_min = 48000,
   .rate_max = 48000,
   .channels_min = 2,
   .channels_max = 2,
  },
  .ops    = &asoc_qcom_lpass_cpu_dai_ops,
 }, {
  .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,
  },
  .ops    = &asoc_qcom_lpass_cpu_dai_ops2,
 }, {
  .id = LPASS_DP_RX,
  .name = "Hdmi",
  .playback = {
   .stream_name = "Hdmi 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,
 },
};

static int sc7180_lpass_alloc_dma_channel(struct lpass_data *drvdata,
        int direction, unsigned int dai_id)
{
 const struct lpass_variant *v = drvdata->variant;
 int chan = 0;

 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 sc7180_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
{
 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 sc7180_lpass_init(struct platform_device *pdev)
{
 struct lpass_data *drvdata = platform_get_drvdata(pdev);
 const 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);
 if (!drvdata->clks)
  return -ENOMEM;

 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 int sc7180_lpass_dev_resume(struct device *dev)
{
 struct lpass_data *drvdata = dev_get_drvdata(dev);

 return clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks);
}

static int sc7180_lpass_dev_suspend(struct device *dev)
{
 struct lpass_data *drvdata = dev_get_drvdata(dev);

 clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
 return 0;
}

static const struct dev_pm_ops sc7180_lpass_pm_ops = {
 SYSTEM_SLEEP_PM_OPS(sc7180_lpass_dev_suspend, sc7180_lpass_dev_resume)
};

static const 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,
 .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,

 .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),

 .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),

 .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*[]) {
       "pcnoc-sway-clk",
       "audio-core",
       "pcnoc-mport-clk",
    },
 .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 *[]) {
       "mi2s-bit-clk0",
       "mi2s-bit-clk1",
    },
 .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[] __maybe_unused = {
 {.compatible = "qcom,sc7180-lpass-cpu", .data = &sc7180_data},
 {}
};
MODULE_DEVICE_TABLE(of, sc7180_lpass_cpu_device_id);

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),
  .pm = pm_ptr(&sc7180_lpass_pm_ops),
 },
 .probe = asoc_qcom_lpass_cpu_platform_probe,
 .remove = asoc_qcom_lpass_cpu_platform_remove,
 .shutdown = asoc_qcom_lpass_cpu_platform_shutdown,
};

module_platform_driver(sc7180_lpass_cpu_platform_driver);

MODULE_DESCRIPTION("SC7180 LPASS CPU DRIVER");
MODULE_LICENSE("GPL");