sound/soc/qcom/lpass-ipq806x.c

   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         .ops    = &asoc_qcom_lpass_cpu_dai_ops,
  55 };
  56
  57 static int ipq806x_lpass_init(struct platform_device *pdev)
  58 {
  59         struct lpass_data *drvdata = platform_get_drvdata(pdev);
  60         struct device *dev = &pdev->dev;
  61         int ret;
  62
  63         drvdata->ahbix_clk = devm_clk_get(dev, "ahbix-clk");
  64         if (IS_ERR(drvdata->ahbix_clk)) {
  65                 dev_err(dev, "error getting ahbix-clk: %ld\n",
  66                                 PTR_ERR(drvdata->ahbix_clk));
  67                 ret = PTR_ERR(drvdata->ahbix_clk);
  68                 goto err_ahbix_clk;
  69         }
  70
  71         ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
  72         if (ret) {
  73                 dev_err(dev, "error setting rate on ahbix_clk: %d\n", ret);
  74                 goto err_ahbix_clk;
  75         }
  76         dev_dbg(dev, "set ahbix_clk rate to %lu\n",
  77                         clk_get_rate(drvdata->ahbix_clk));
  78
  79         ret = clk_prepare_enable(drvdata->ahbix_clk);
  80         if (ret) {
  81                 dev_err(dev, "error enabling ahbix_clk: %d\n", ret);
  82                 goto err_ahbix_clk;
  83         }
  84
  85 err_ahbix_clk:
  86         return ret;
  87 }
  88
  89 static int ipq806x_lpass_exit(struct platform_device *pdev)
  90 {
  91         struct lpass_data *drvdata = platform_get_drvdata(pdev);
  92
  93         clk_disable_unprepare(drvdata->ahbix_clk);
  94
  95         return 0;
  96 }
  97
  98 static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir, unsigned int dai_id)
  99 {
 100         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 101                 return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
 102         else    /* Capture currently not implemented */
 103                 return -EINVAL;
 104 }
 105
 106 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
 107 {
 108         return 0;
 109 }
 110
 111 static const struct lpass_variant ipq806x_data = {
 112         .i2sctrl_reg_base       = 0x0010,
 113         .i2sctrl_reg_stride     = 0x04,
 114         .i2s_ports              = 5,
 115         .irq_reg_base           = 0x3000,
 116         .irq_reg_stride         = 0x1000,
 117         .irq_ports              = 3,
 118         .rdma_reg_base          = 0x6000,
 119         .rdma_reg_stride        = 0x1000,
 120         .rdma_channels          = 4,
 121         .wrdma_reg_base         = 0xB000,
 122         .wrdma_reg_stride       = 0x1000,
 123         .wrdma_channel_start    = 5,
 124         .wrdma_channels         = 4,
 125         .loopback               = REG_FIELD_ID(0x0010, 15, 15, 5, 0x4),
 126         .spken                  = REG_FIELD_ID(0x0010, 14, 14, 5, 0x4),
 127         .spkmode                = REG_FIELD_ID(0x0010, 10, 13, 5, 0x4),
 128         .spkmono                = REG_FIELD_ID(0x0010, 9, 9, 5, 0x4),
 129         .micen                  = REG_FIELD_ID(0x0010, 8, 8, 5, 0x4),
 130         .micmode                = REG_FIELD_ID(0x0010, 4, 7, 5, 0x4),
 131         .micmono                = REG_FIELD_ID(0x0010, 3, 3, 5, 0x4),
 132         .wssrc                  = REG_FIELD_ID(0x0010, 2, 2, 5, 0x4),
 133         .bitwidth               = REG_FIELD_ID(0x0010, 0, 1, 5, 0x4),
 134
 135         .rdma_dyncclk           = REG_FIELD_ID(0x6000, 12, 12, 4, 0x1000),
 136         .rdma_bursten           = REG_FIELD_ID(0x6000, 11, 11, 4, 0x1000),
 137         .rdma_wpscnt            = REG_FIELD_ID(0x6000, 8, 10, 4, 0x1000),
 138         .rdma_intf              = REG_FIELD_ID(0x6000, 4, 7, 4, 0x1000),
 139         .rdma_fifowm            = REG_FIELD_ID(0x6000, 1, 3, 4, 0x1000),
 140         .rdma_enable            = REG_FIELD_ID(0x6000, 0, 0, 4, 0x1000),
 141
 142         .wrdma_dyncclk          = REG_FIELD_ID(0xB000, 12, 12, 4, 0x1000),
 143         .wrdma_bursten          = REG_FIELD_ID(0xB000, 11, 11, 4, 0x1000),
 144         .wrdma_wpscnt           = REG_FIELD_ID(0xB000, 8, 10, 4, 0x1000),
 145         .wrdma_intf             = REG_FIELD_ID(0xB000, 4, 7, 4, 0x1000),
 146         .wrdma_fifowm           = REG_FIELD_ID(0xB000, 1, 3, 4, 0x1000),
 147         .wrdma_enable           = REG_FIELD_ID(0xB000, 0, 0, 4, 0x1000),
 148
 149         .dai_driver             = &ipq806x_lpass_cpu_dai_driver,
 150         .num_dai                = 1,
 151         .dai_osr_clk_names      = (const char *[]) {
 152                                 "mi2s-osr-clk",
 153                                 },
 154         .dai_bit_clk_names      = (const char *[]) {
 155                                 "mi2s-bit-clk",
 156                                 },
 157         .init                   = ipq806x_lpass_init,
 158         .exit                   = ipq806x_lpass_exit,
 159         .alloc_dma_channel      = ipq806x_lpass_alloc_dma_channel,
 160         .free_dma_channel       = ipq806x_lpass_free_dma_channel,
 161 };
 162
 163 static const struct of_device_id ipq806x_lpass_cpu_device_id[] __maybe_unused = {
 164         { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
 165         {}
 166 };
 167 MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
 168
 169 static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
 170         .driver = {
 171                 .name           = "lpass-cpu",
 172                 .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
 173         },
 174         .probe  = asoc_qcom_lpass_cpu_platform_probe,
 175         .remove = asoc_qcom_lpass_cpu_platform_remove,
 176 };
 177 module_platform_driver(ipq806x_lpass_cpu_platform_driver);
 178
 179 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
 180 MODULE_LICENSE("GPL");