sound/soc/qcom/lpass.h

   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.h - Definitions for the QTi LPASS
  14  */
  15
  16 #ifndef __LPASS_H__
  17 #define __LPASS_H__
  18
  19 #include <linux/clk.h>
  20 #include <linux/compiler.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23
  24 #define LPASS_AHBIX_CLOCK_FREQUENCY             131072000
  25 #define LPASS_MAX_MI2S_PORTS                    (8)
  26 #define LPASS_MAX_DMA_CHANNELS                  (8)
  27
  28 /* Both the CPU DAI and platform drivers will access this data */
  29 struct lpass_data {
  30
  31         /* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
  32         struct clk *ahbix_clk;
  33
  34         /* MI2S system clock */
  35         struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
  36
  37         /* MI2S bit clock (derived from system clock by a divider */
  38         struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
  39
  40         /* low-power audio interface (LPAIF) registers */
  41         void __iomem *lpaif;
  42
  43         /* regmap backed by the low-power audio interface (LPAIF) registers */
  44         struct regmap *lpaif_map;
  45
  46         /* interrupts from the low-power audio interface (LPAIF) */
  47         int lpaif_irq;
  48
  49         /* SOC specific variations in the LPASS IP integration */
  50         struct lpass_variant *variant;
  51
  52         /* bit map to keep track of static channel allocations */
  53         unsigned long dma_ch_bit_map;
  54
  55         /* used it for handling interrupt per dma channel */
  56         struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
  57
  58         /* 8016 specific */
  59         struct clk *pcnoc_mport_clk;
  60         struct clk *pcnoc_sway_clk;
  61
  62         void *private_data;
  63 };
  64
  65 /* Vairant data per each SOC */
  66 struct lpass_variant {
  67         u32     i2sctrl_reg_base;
  68         u32     i2sctrl_reg_stride;
  69         u32     i2s_ports;
  70         u32     irq_reg_base;
  71         u32     irq_reg_stride;
  72         u32     irq_ports;
  73         u32     rdma_reg_base;
  74         u32     rdma_reg_stride;
  75         u32     rdma_channels;
  76         u32     wrdma_reg_base;
  77         u32     wrdma_reg_stride;
  78         u32     wrdma_channels;
  79
  80         /**
  81          * on SOCs like APQ8016 the channel control bits start
  82          * at different offset to ipq806x
  83          **/
  84         u32     dmactl_audif_start;
  85         u32     wrdma_channel_start;
  86         /* SOC specific intialization like clocks */
  87         int (*init)(struct platform_device *pdev);
  88         int (*exit)(struct platform_device *pdev);
  89         int (*alloc_dma_channel)(struct lpass_data *data, int direction);
  90         int (*free_dma_channel)(struct lpass_data *data, int ch);
  91
  92         /* SOC specific dais */
  93         struct snd_soc_dai_driver *dai_driver;
  94         int num_dai;
  95 };
  96
  97 /* register the platform driver from the CPU DAI driver */
  98 int asoc_qcom_lpass_platform_register(struct platform_device *);
  99 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
 100 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
 101 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
 102 extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
 103
 104 #endif /* __LPASS_H__ */