sound/ac97/snd_ac97_compat.c

   1 /*
   2  *  Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr>
   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 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/list.h>
  10 #include <linux/slab.h>
  11 #include <sound/ac97/codec.h>
  12 #include <sound/ac97/compat.h>
  13 #include <sound/ac97/controller.h>
  14 #include <sound/soc.h>
  15
  16 #include "ac97_core.h"
  17
  18 static void compat_ac97_reset(struct snd_ac97 *ac97)
  19 {
  20         struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
  21         struct ac97_controller *actrl = adev->ac97_ctrl;
  22
  23         if (actrl->ops->reset)
  24                 actrl->ops->reset(actrl);
  25 }
  26
  27 static void compat_ac97_warm_reset(struct snd_ac97 *ac97)
  28 {
  29         struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
  30         struct ac97_controller *actrl = adev->ac97_ctrl;
  31
  32         if (actrl->ops->warm_reset)
  33                 actrl->ops->warm_reset(actrl);
  34 }
  35
  36 static void compat_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
  37                               unsigned short val)
  38 {
  39         struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
  40         struct ac97_controller *actrl = adev->ac97_ctrl;
  41
  42         actrl->ops->write(actrl, ac97->num, reg, val);
  43 }
  44
  45 static unsigned short compat_ac97_read(struct snd_ac97 *ac97,
  46                                        unsigned short reg)
  47 {
  48         struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
  49         struct ac97_controller *actrl = adev->ac97_ctrl;
  50
  51         return actrl->ops->read(actrl, ac97->num, reg);
  52 }
  53
  54 static struct snd_ac97_bus_ops compat_snd_ac97_bus_ops = {
  55         .reset = compat_ac97_reset,
  56         .warm_reset = compat_ac97_warm_reset,
  57         .write = compat_ac97_write,
  58         .read = compat_ac97_read,
  59 };
  60
  61 static struct snd_ac97_bus compat_soc_ac97_bus = {
  62         .ops = &compat_snd_ac97_bus_ops,
  63 };
  64
  65 struct snd_ac97 *snd_ac97_compat_alloc(struct ac97_codec_device *adev)
  66 {
  67         struct snd_ac97 *ac97;
  68
  69         ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
  70         if (ac97 == NULL)
  71                 return ERR_PTR(-ENOMEM);
  72
  73         ac97->dev = adev->dev;
  74         ac97->private_data = adev;
  75         ac97->bus = &compat_soc_ac97_bus;
  76         return ac97;
  77 }
  78 EXPORT_SYMBOL_GPL(snd_ac97_compat_alloc);
  79
  80 void snd_ac97_compat_release(struct snd_ac97 *ac97)
  81 {
  82         kfree(ac97);
  83 }
  84 EXPORT_SYMBOL_GPL(snd_ac97_compat_release);
  85
  86 int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id,
  87         unsigned int id_mask)
  88 {
  89         struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
  90         struct ac97_controller *actrl = adev->ac97_ctrl;
  91         unsigned int scanned;
  92
  93         if (try_warm) {
  94                 compat_ac97_warm_reset(ac97);
  95                 scanned = snd_ac97_bus_scan_one(actrl, adev->num);
  96                 if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
  97                         return 1;
  98         }
  99
 100         compat_ac97_reset(ac97);
 101         compat_ac97_warm_reset(ac97);
 102         scanned = snd_ac97_bus_scan_one(actrl, adev->num);
 103         if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
 104                 return 0;
 105
 106         return -ENODEV;
 107 }
 108 EXPORT_SYMBOL_GPL(snd_ac97_reset);