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

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  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");
123 

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