root/sound/soc/qcom/lpass-ipq806x.c

DEFINITIONS

1. ipq806x_lpass_alloc_dma_channel
2. ipq806x_lpass_free_dma_channel

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
   4  *
   5  * lpass-ipq806x.c -- ALSA SoC CPU DAI driver for QTi LPASS
   6  * Splited out the IPQ8064 soc specific from lpass-cpu.c
   7  */
   8 
   9 #include <linux/clk.h>
  10 #include <linux/device.h>
  11 #include <linux/err.h>
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/of.h>
  15 #include <linux/platform_device.h>
  16 #include <sound/pcm.h>
  17 #include <sound/soc.h>
  18 #include <sound/soc-dai.h>
  19 
  20 #include "lpass-lpaif-reg.h"
  21 #include "lpass.h"
  22 
  23 enum lpaif_i2s_ports {
  24         IPQ806X_LPAIF_I2S_PORT_CODEC_SPK,
  25         IPQ806X_LPAIF_I2S_PORT_CODEC_MIC,
  26         IPQ806X_LPAIF_I2S_PORT_SEC_SPK,
  27         IPQ806X_LPAIF_I2S_PORT_SEC_MIC,
  28         IPQ806X_LPAIF_I2S_PORT_MI2S,
  29 };
  30 
  31 enum lpaif_dma_channels {
  32         IPQ806X_LPAIF_RDMA_CHAN_MI2S,
  33         IPQ806X_LPAIF_RDMA_CHAN_PCM0,
  34         IPQ806X_LPAIF_RDMA_CHAN_PCM1,
  35 };
  36 
  37 static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
  38         .id     = IPQ806X_LPAIF_I2S_PORT_MI2S,
  39         .playback = {
  40                 .stream_name    = "lpass-cpu-playback",
  41                 .formats        = SNDRV_PCM_FMTBIT_S16 |
  42                                         SNDRV_PCM_FMTBIT_S24 |
  43                                         SNDRV_PCM_FMTBIT_S32,
  44                 .rates          = SNDRV_PCM_RATE_8000 |
  45                                         SNDRV_PCM_RATE_16000 |
  46                                         SNDRV_PCM_RATE_32000 |
  47                                         SNDRV_PCM_RATE_48000 |
  48                                         SNDRV_PCM_RATE_96000,
  49                 .rate_min       = 8000,
  50                 .rate_max       = 96000,
  51                 .channels_min   = 1,
  52                 .channels_max   = 8,
  53         },
  54         .probe  = &asoc_qcom_lpass_cpu_dai_probe,
  55         .ops    = &asoc_qcom_lpass_cpu_dai_ops,
  56 };
  57 
  58 static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir)
  59 {
  60         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
  61                 return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
  62         else    /* Capture currently not implemented */
  63                 return -EINVAL;
  64 }
  65 
  66 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
  67 {
  68         return 0;
  69 }
  70 
  71 static struct lpass_variant ipq806x_data = {
  72         .i2sctrl_reg_base       = 0x0010,
  73         .i2sctrl_reg_stride     = 0x04,
  74         .i2s_ports              = 5,
  75         .irq_reg_base           = 0x3000,
  76         .irq_reg_stride         = 0x1000,
  77         .irq_ports              = 3,
  78         .rdma_reg_base          = 0x6000,
  79         .rdma_reg_stride        = 0x1000,
  80         .rdma_channels          = 4,
  81         .wrdma_reg_base         = 0xB000,
  82         .wrdma_reg_stride       = 0x1000,
  83         .wrdma_channel_start    = 5,
  84         .wrdma_channels         = 4,
  85         .dai_driver             = &ipq806x_lpass_cpu_dai_driver,
  86         .num_dai                = 1,
  87         .dai_osr_clk_names      = (const char *[]) {
  88                                 "mi2s-osr-clk",
  89                                 },
  90         .dai_bit_clk_names      = (const char *[]) {
  91                                 "mi2s-bit-clk",
  92                                 },
  93         .alloc_dma_channel      = ipq806x_lpass_alloc_dma_channel,
  94         .free_dma_channel       = ipq806x_lpass_free_dma_channel,
  95 };
  96 
  97 static const struct of_device_id ipq806x_lpass_cpu_device_id[] = {
  98         { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
  99         {}
 100 };
 101 MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
 102 
 103 static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
 104         .driver = {
 105                 .name           = "lpass-cpu",
 106                 .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
 107         },
 108         .probe  = asoc_qcom_lpass_cpu_platform_probe,
 109         .remove = asoc_qcom_lpass_cpu_platform_remove,
 110 };
 111 module_platform_driver(ipq806x_lpass_cpu_platform_driver);
 112 
 113 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
 114 MODULE_LICENSE("GPL v2");