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
  31 enum 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
  39 enum lpaif_dma_channels {
  40         IPQ806X_LPAIF_RDMA_CHAN_MI2S,
  41         IPQ806X_LPAIF_RDMA_CHAN_PCM0,
  42         IPQ806X_LPAIF_RDMA_CHAN_PCM1,
  43 };
  44
  45 static 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
  66 static 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
  74 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
  75 {
  76         return 0;
  77 }
  78
  79 static 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         .dai_osr_clk_names      = (const char *[]) {
  96                                 "mi2s-osr-clk",
  97                                 },
  98         .dai_bit_clk_names      = (const char *[]) {
  99                                 "mi2s-bit-clk",
 100                                 },
 101         .alloc_dma_channel      = ipq806x_lpass_alloc_dma_channel,
 102         .free_dma_channel       = ipq806x_lpass_free_dma_channel,
 103 };
 104
 105 static const struct of_device_id ipq806x_lpass_cpu_device_id[] = {
 106         { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
 107         {}
 108 };
 109 MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
 110
 111 static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
 112         .driver = {
 113                 .name           = "lpass-cpu",
 114                 .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
 115         },
 116         .probe  = asoc_qcom_lpass_cpu_platform_probe,
 117         .remove = asoc_qcom_lpass_cpu_platform_remove,
 118 };
 119 module_platform_driver(ipq806x_lpass_cpu_platform_driver);
 120
 121 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
 122 MODULE_LICENSE("GPL v2");