Quelle  lpass-ipq806x.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
 *
 * lpass-ipq806x.c -- ALSA SoC CPU DAI driver for QTi LPASS
 * Splited out the IPQ8064 soc specific from lpass-cpu.c
 */

#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/soc.h>
#include <sound/soc-dai.h>

#include "lpass-lpaif-reg.h"
#include "lpass.h"

enum lpaif_i2s_ports {
 IPQ806X_LPAIF_I2S_PORT_CODEC_SPK,
 IPQ806X_LPAIF_I2S_PORT_CODEC_MIC,
 IPQ806X_LPAIF_I2S_PORT_SEC_SPK,
 IPQ806X_LPAIF_I2S_PORT_SEC_MIC,
 IPQ806X_LPAIF_I2S_PORT_MI2S,
};

enum lpaif_dma_channels {
 IPQ806X_LPAIF_RDMA_CHAN_MI2S,
 IPQ806X_LPAIF_RDMA_CHAN_PCM0,
 IPQ806X_LPAIF_RDMA_CHAN_PCM1,
};

static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
 .id = IPQ806X_LPAIF_I2S_PORT_MI2S,
 .playback = {
  .stream_name = "lpass-cpu-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,
 },
 .ops    = &asoc_qcom_lpass_cpu_dai_ops,
};

static int ipq806x_lpass_init(struct platform_device *pdev)
{
 struct lpass_data *drvdata = platform_get_drvdata(pdev);
 struct device *dev = &pdev->dev;
 int ret;

 drvdata->ahbix_clk = devm_clk_get(dev, "ahbix-clk");
 if (IS_ERR(drvdata->ahbix_clk)) {
  dev_err(dev, "error getting ahbix-clk: %ld\n",
    PTR_ERR(drvdata->ahbix_clk));
  ret = PTR_ERR(drvdata->ahbix_clk);
  goto err_ahbix_clk;
 }

 ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
 if (ret) {
  dev_err(dev, "error setting rate on ahbix_clk: %d\n", ret);
  goto err_ahbix_clk;
 }
 dev_dbg(dev, "set ahbix_clk rate to %lu\n",
   clk_get_rate(drvdata->ahbix_clk));

 ret = clk_prepare_enable(drvdata->ahbix_clk);
 if (ret) {
  dev_err(dev, "error enabling ahbix_clk: %d\n", ret);
  goto err_ahbix_clk;
 }

err_ahbix_clk:
 return ret;
}

static int ipq806x_lpass_exit(struct platform_device *pdev)
{
 struct lpass_data *drvdata = platform_get_drvdata(pdev);

 clk_disable_unprepare(drvdata->ahbix_clk);

 return 0;
}

static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir, unsigned int dai_id)
{
 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
  return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
 else /* Capture currently not implemented */
  return -EINVAL;
}

static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
{
 return 0;
}

static const struct lpass_variant ipq806x_data = {
 .i2sctrl_reg_base = 0x0010,
 .i2sctrl_reg_stride = 0x04,
 .i2s_ports  = 5,
 .irq_reg_base  = 0x3000,
 .irq_reg_stride  = 0x1000,
 .irq_ports  = 3,
 .rdma_reg_base  = 0x6000,
 .rdma_reg_stride = 0x1000,
 .rdma_channels  = 4,
 .wrdma_reg_base  = 0xB000,
 .wrdma_reg_stride = 0x1000,
 .wrdma_channel_start = 5,
 .wrdma_channels  = 4,
 .loopback  = REG_FIELD_ID(0x0010, 15, 15, 5, 0x4),
 .spken   = REG_FIELD_ID(0x0010, 14, 14, 5, 0x4),
 .spkmode  = REG_FIELD_ID(0x0010, 10, 13, 5, 0x4),
 .spkmono  = REG_FIELD_ID(0x0010, 9, 9, 5, 0x4),
 .micen   = REG_FIELD_ID(0x0010, 8, 8, 5, 0x4),
 .micmode  = REG_FIELD_ID(0x0010, 4, 7, 5, 0x4),
 .micmono  = REG_FIELD_ID(0x0010, 3, 3, 5, 0x4),
 .wssrc   = REG_FIELD_ID(0x0010, 2, 2, 5, 0x4),
 .bitwidth  = REG_FIELD_ID(0x0010, 0, 1, 5, 0x4),

 .rdma_dyncclk  = REG_FIELD_ID(0x6000, 12, 12, 4, 0x1000),
 .rdma_bursten  = REG_FIELD_ID(0x6000, 11, 11, 4, 0x1000),
 .rdma_wpscnt  = REG_FIELD_ID(0x6000, 8, 10, 4, 0x1000),
 .rdma_intf  = REG_FIELD_ID(0x6000, 4, 7, 4, 0x1000),
 .rdma_fifowm  = REG_FIELD_ID(0x6000, 1, 3, 4, 0x1000),
 .rdma_enable  = REG_FIELD_ID(0x6000, 0, 0, 4, 0x1000),

 .wrdma_dyncclk  = REG_FIELD_ID(0xB000, 12, 12, 4, 0x1000),
 .wrdma_bursten  = REG_FIELD_ID(0xB000, 11, 11, 4, 0x1000),
 .wrdma_wpscnt  = REG_FIELD_ID(0xB000, 8, 10, 4, 0x1000),
 .wrdma_intf  = REG_FIELD_ID(0xB000, 4, 7, 4, 0x1000),
 .wrdma_fifowm  = REG_FIELD_ID(0xB000, 1, 3, 4, 0x1000),
 .wrdma_enable  = REG_FIELD_ID(0xB000, 0, 0, 4, 0x1000),

 .dai_driver  = &ipq806x_lpass_cpu_dai_driver,
 .num_dai  = 1,
 .dai_osr_clk_names = (const char *[]) {
    "mi2s-osr-clk",
    },
 .dai_bit_clk_names = (const char *[]) {
    "mi2s-bit-clk",
    },
 .init   = ipq806x_lpass_init,
 .exit   = ipq806x_lpass_exit,
 .alloc_dma_channel = ipq806x_lpass_alloc_dma_channel,
 .free_dma_channel = ipq806x_lpass_free_dma_channel,
};

static const struct of_device_id ipq806x_lpass_cpu_device_id[] __maybe_unused = {
 { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
 {}
};
MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);

static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
 .driver = {
  .name  = "lpass-cpu",
  .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
 },
 .probe = asoc_qcom_lpass_cpu_platform_probe,
 .remove = asoc_qcom_lpass_cpu_platform_remove,
};
module_platform_driver(ipq806x_lpass_cpu_platform_driver);

MODULE_DESCRIPTION("QTi LPASS CPU Driver");
MODULE_LICENSE("GPL");