sound/soc/qcom/lpass.h

   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.h - Definitions for the QTi LPASS
   6  */
   7
   8 #ifndef __LPASS_H__
   9 #define __LPASS_H__
  10
  11 #include <linux/clk.h>
  12 #include <linux/compiler.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/regmap.h>
  15
  16 #define LPASS_AHBIX_CLOCK_FREQUENCY             131072000
  17 #define LPASS_MAX_MI2S_PORTS                    (8)
  18 #define LPASS_MAX_DMA_CHANNELS                  (8)
  19
  20 /* Both the CPU DAI and platform drivers will access this data */
  21 struct lpass_data {
  22
  23         /* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
  24         struct clk *ahbix_clk;
  25
  26         /* MI2S system clock */
  27         struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
  28
  29         /* MI2S bit clock (derived from system clock by a divider */
  30         struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
  31
  32         /* low-power audio interface (LPAIF) registers */
  33         void __iomem *lpaif;
  34
  35         /* regmap backed by the low-power audio interface (LPAIF) registers */
  36         struct regmap *lpaif_map;
  37
  38         /* interrupts from the low-power audio interface (LPAIF) */
  39         int lpaif_irq;
  40
  41         /* SOC specific variations in the LPASS IP integration */
  42         struct lpass_variant *variant;
  43
  44         /* bit map to keep track of static channel allocations */
  45         unsigned long dma_ch_bit_map;
  46
  47         /* used it for handling interrupt per dma channel */
  48         struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
  49
  50         /* 8016 specific */
  51         struct clk *pcnoc_mport_clk;
  52         struct clk *pcnoc_sway_clk;
  53
  54 };
  55
  56 /* Vairant data per each SOC */
  57 struct lpass_variant {
  58         u32     i2sctrl_reg_base;
  59         u32     i2sctrl_reg_stride;
  60         u32     i2s_ports;
  61         u32     irq_reg_base;
  62         u32     irq_reg_stride;
  63         u32     irq_ports;
  64         u32     rdma_reg_base;
  65         u32     rdma_reg_stride;
  66         u32     rdma_channels;
  67         u32     wrdma_reg_base;
  68         u32     wrdma_reg_stride;
  69         u32     wrdma_channels;
  70
  71         /**
  72          * on SOCs like APQ8016 the channel control bits start
  73          * at different offset to ipq806x
  74          **/
  75         u32     dmactl_audif_start;
  76         u32     wrdma_channel_start;
  77         /* SOC specific initialization like clocks */
  78         int (*init)(struct platform_device *pdev);
  79         int (*exit)(struct platform_device *pdev);
  80         int (*alloc_dma_channel)(struct lpass_data *data, int direction);
  81         int (*free_dma_channel)(struct lpass_data *data, int ch);
  82
  83         /* SOC specific dais */
  84         struct snd_soc_dai_driver *dai_driver;
  85         int num_dai;
  86         const char * const *dai_osr_clk_names;
  87         const char * const *dai_bit_clk_names;
  88 };
  89
  90 /* register the platform driver from the CPU DAI driver */
  91 int asoc_qcom_lpass_platform_register(struct platform_device *);
  92 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
  93 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
  94 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
  95 extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
  96
  97 #endif /* __LPASS_H__ */