LXR linux/sound/soc/sof/intel/hda-bus.c

   1// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2//
   3// This file is provided under a dual BSD/GPLv2 license.  When using or
   4// redistributing this file, you may do so under either license.
   5//
   6// Copyright(c) 2018 Intel Corporation. All rights reserved.
   7//
   8// Authors: Keyon Jie <yang.jie@linux.intel.com>
   9
  10#include <linux/io.h>
  11#include <sound/hdaudio.h>
  12#include "../sof-priv.h"
  13#include "hda.h"
  14
  15#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
  16
  17static const struct hdac_bus_ops bus_ops = {
  18        .command = snd_hdac_bus_send_cmd,
  19        .get_response = snd_hdac_bus_get_response,
  20};
  21
  22#endif
  23
  24static void sof_hda_writel(u32 value, u32 __iomem *addr)
  25{
  26        writel(value, addr);
  27}
  28
  29static u32 sof_hda_readl(u32 __iomem *addr)
  30{
  31        return readl(addr);
  32}
  33
  34static void sof_hda_writew(u16 value, u16 __iomem *addr)
  35{
  36        writew(value, addr);
  37}
  38
  39static u16 sof_hda_readw(u16 __iomem *addr)
  40{
  41        return readw(addr);
  42}
  43
  44static void sof_hda_writeb(u8 value, u8 __iomem *addr)
  45{
  46        writeb(value, addr);
  47}
  48
  49static u8 sof_hda_readb(u8 __iomem *addr)
  50{
  51        return readb(addr);
  52}
  53
  54static int sof_hda_dma_alloc_pages(struct hdac_bus *bus, int type,
  55                                   size_t size, struct snd_dma_buffer *buf)
  56{
  57        return snd_dma_alloc_pages(type, bus->dev, size, buf);
  58}
  59
  60static void sof_hda_dma_free_pages(struct hdac_bus *bus,
  61                                   struct snd_dma_buffer *buf)
  62{
  63        snd_dma_free_pages(buf);
  64}
  65
  66static const struct hdac_io_ops io_ops = {
  67        .reg_writel = sof_hda_writel,
  68        .reg_readl = sof_hda_readl,
  69        .reg_writew = sof_hda_writew,
  70        .reg_readw = sof_hda_readw,
  71        .reg_writeb = sof_hda_writeb,
  72        .reg_readb = sof_hda_readb,
  73        .dma_alloc_pages = sof_hda_dma_alloc_pages,
  74        .dma_free_pages = sof_hda_dma_free_pages,
  75};
  76
  77/*
  78 * This can be used for both with/without hda link support.
  79 */
  80void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev,
  81                      const struct hdac_ext_bus_ops *ext_ops)
  82{
  83        memset(bus, 0, sizeof(*bus));
  84        bus->dev = dev;
  85
  86        bus->io_ops = &io_ops;
  87        INIT_LIST_HEAD(&bus->stream_list);
  88
  89        bus->irq = -1;
  90        bus->ext_ops = ext_ops;
  91
  92        /*
  93         * There is only one HDA bus atm. keep the index as 0.
  94         * Need to fix when there are more than one HDA bus.
  95         */
  96        bus->idx = 0;
  97
  98        spin_lock_init(&bus->reg_lock);
  99
 100#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
 101        INIT_LIST_HEAD(&bus->codec_list);
 102        INIT_LIST_HEAD(&bus->hlink_list);
 103
 104        mutex_init(&bus->cmd_mutex);
 105        mutex_init(&bus->lock);
 106        bus->ops = &bus_ops;
 107        INIT_WORK(&bus->unsol_work, snd_hdac_bus_process_unsol_events);
 108        bus->cmd_dma_state = true;
 109#endif
 110
 111}
 112