LXR linux/sound/soc/qcom/lpass-ipq806x.c

   1/*
   2 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 and
   6 * only version 2 as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 *
  13 * lpass-ipq806x.c -- ALSA SoC CPU DAI driver for QTi LPASS
  14 * Splited out the IPQ8064 soc specific from lpass-cpu.c
  15 */
  16
  17#include <linux/clk.h>
  18#include <linux/device.h>
  19#include <linux/err.h>
  20#include <linux/kernel.h>
  21#include <linux/module.h>
  22#include <linux/of.h>
  23#include <linux/platform_device.h>
  24#include <sound/pcm.h>
  25#include <sound/soc.h>
  26#include <sound/soc-dai.h>
  27
  28#include "lpass-lpaif-reg.h"
  29#include "lpass.h"
  30
  31enum lpaif_i2s_ports {
  32        IPQ806X_LPAIF_I2S_PORT_CODEC_SPK,
  33        IPQ806X_LPAIF_I2S_PORT_CODEC_MIC,
  34        IPQ806X_LPAIF_I2S_PORT_SEC_SPK,
  35        IPQ806X_LPAIF_I2S_PORT_SEC_MIC,
  36        IPQ806X_LPAIF_I2S_PORT_MI2S,
  37};
  38
  39enum lpaif_dma_channels {
  40        IPQ806X_LPAIF_RDMA_CHAN_MI2S,
  41        IPQ806X_LPAIF_RDMA_CHAN_PCM0,
  42        IPQ806X_LPAIF_RDMA_CHAN_PCM1,
  43};
  44
  45static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
  46        .id     = IPQ806X_LPAIF_I2S_PORT_MI2S,
  47        .playback = {
  48                .stream_name    = "lpass-cpu-playback",
  49                .formats        = SNDRV_PCM_FMTBIT_S16 |
  50                                        SNDRV_PCM_FMTBIT_S24 |
  51                                        SNDRV_PCM_FMTBIT_S32,
  52                .rates          = SNDRV_PCM_RATE_8000 |
  53                                        SNDRV_PCM_RATE_16000 |
  54                                        SNDRV_PCM_RATE_32000 |
  55                                        SNDRV_PCM_RATE_48000 |
  56                                        SNDRV_PCM_RATE_96000,
  57                .rate_min       = 8000,
  58                .rate_max       = 96000,
  59                .channels_min   = 1,
  60                .channels_max   = 8,
  61        },
  62        .probe  = &asoc_qcom_lpass_cpu_dai_probe,
  63        .ops    = &asoc_qcom_lpass_cpu_dai_ops,
  64};
  65
  66static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir)
  67{
  68        if (dir == SNDRV_PCM_STREAM_PLAYBACK)
  69                return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
  70        else    /* Capture currently not implemented */
  71                return -EINVAL;
  72}
  73
  74static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
  75{
  76        return 0;
  77}
  78
  79static struct lpass_variant ipq806x_data = {
  80        .i2sctrl_reg_base       = 0x0010,
  81        .i2sctrl_reg_stride     = 0x04,
  82        .i2s_ports              = 5,
  83        .irq_reg_base           = 0x3000,
  84        .irq_reg_stride         = 0x1000,
  85        .irq_ports              = 3,
  86        .rdma_reg_base          = 0x6000,
  87        .rdma_reg_stride        = 0x1000,
  88        .rdma_channels          = 4,
  89        .wrdma_reg_base         = 0xB000,
  90        .wrdma_reg_stride       = 0x1000,
  91        .wrdma_channel_start    = 5,
  92        .wrdma_channels         = 4,
  93        .dai_driver             = &ipq806x_lpass_cpu_dai_driver,
  94        .num_dai                = 1,
  95        .alloc_dma_channel      = ipq806x_lpass_alloc_dma_channel,
  96        .free_dma_channel       = ipq806x_lpass_free_dma_channel,
  97};
  98
  99static const struct of_device_id ipq806x_lpass_cpu_device_id[] = {
 100        { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
 101        {}
 102};
 103MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
 104
 105static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
 106        .driver = {
 107                .name           = "lpass-cpu",
 108                .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
 109        },
 110        .probe  = asoc_qcom_lpass_cpu_platform_probe,
 111        .remove = asoc_qcom_lpass_cpu_platform_remove,
 112};
 113module_platform_driver(ipq806x_lpass_cpu_platform_driver);
 114
 115MODULE_DESCRIPTION("QTi LPASS CPU Driver");
 116MODULE_LICENSE("GPL v2");
 117