root/sound/pci/oxygen/xonar_hdmi.c

DEFINITIONS

1. hdmi_write_command
2. xonar_hdmi_init_commands
3. xonar_hdmi_init
4. xonar_hdmi_cleanup
5. xonar_hdmi_resume
6. xonar_hdmi_pcm_hardware_filter
7. xonar_set_hdmi_params
8. xonar_hdmi_uart_input

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * helper functions for HDMI models (Xonar HDAV1.3/HDAV1.3 Slim)
   4  *
   5  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   6  */
   7 
   8 #include <linux/pci.h>
   9 #include <linux/delay.h>
  10 #include <sound/asoundef.h>
  11 #include <sound/control.h>
  12 #include <sound/core.h>
  13 #include <sound/pcm.h>
  14 #include <sound/pcm_params.h>
  15 #include <sound/tlv.h>
  16 #include "xonar.h"
  17 
  18 static void hdmi_write_command(struct oxygen *chip, u8 command,
  19                                unsigned int count, const u8 *params)
  20 {
  21         unsigned int i;
  22         u8 checksum;
  23 
  24         oxygen_write_uart(chip, 0xfb);
  25         oxygen_write_uart(chip, 0xef);
  26         oxygen_write_uart(chip, command);
  27         oxygen_write_uart(chip, count);
  28         for (i = 0; i < count; ++i)
  29                 oxygen_write_uart(chip, params[i]);
  30         checksum = 0xfb + 0xef + command + count;
  31         for (i = 0; i < count; ++i)
  32                 checksum += params[i];
  33         oxygen_write_uart(chip, checksum);
  34 }
  35 
  36 static void xonar_hdmi_init_commands(struct oxygen *chip,
  37                                      struct xonar_hdmi *hdmi)
  38 {
  39         u8 param;
  40 
  41         oxygen_reset_uart(chip);
  42         param = 0;
  43         hdmi_write_command(chip, 0x61, 1, &param);
  44         param = 1;
  45         hdmi_write_command(chip, 0x74, 1, &param);
  46         hdmi_write_command(chip, 0x54, 5, hdmi->params);
  47 }
  48 
  49 void xonar_hdmi_init(struct oxygen *chip, struct xonar_hdmi *hdmi)
  50 {
  51         hdmi->params[1] = IEC958_AES3_CON_FS_48000;
  52         hdmi->params[4] = 1;
  53         xonar_hdmi_init_commands(chip, hdmi);
  54 }
  55 
  56 void xonar_hdmi_cleanup(struct oxygen *chip)
  57 {
  58         u8 param = 0;
  59 
  60         hdmi_write_command(chip, 0x74, 1, &param);
  61 }
  62 
  63 void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
  64 {
  65         xonar_hdmi_init_commands(chip, hdmi);
  66 }
  67 
  68 void xonar_hdmi_pcm_hardware_filter(unsigned int channel,
  69                                     struct snd_pcm_hardware *hardware)
  70 {
  71         if (channel == PCM_MULTICH) {
  72                 hardware->rates = SNDRV_PCM_RATE_44100 |
  73                                   SNDRV_PCM_RATE_48000 |
  74                                   SNDRV_PCM_RATE_96000 |
  75                                   SNDRV_PCM_RATE_192000;
  76                 hardware->rate_min = 44100;
  77         }
  78 }
  79 
  80 void xonar_set_hdmi_params(struct oxygen *chip, struct xonar_hdmi *hdmi,
  81                            struct snd_pcm_hw_params *params)
  82 {
  83         hdmi->params[0] = 0; /* 1 = non-audio */
  84         switch (params_rate(params)) {
  85         case 44100:
  86                 hdmi->params[1] = IEC958_AES3_CON_FS_44100;
  87                 break;
  88         case 48000:
  89                 hdmi->params[1] = IEC958_AES3_CON_FS_48000;
  90                 break;
  91         default: /* 96000 */
  92                 hdmi->params[1] = IEC958_AES3_CON_FS_96000;
  93                 break;
  94         case 192000:
  95                 hdmi->params[1] = IEC958_AES3_CON_FS_192000;
  96                 break;
  97         }
  98         hdmi->params[2] = params_channels(params) / 2 - 1;
  99         if (params_format(params) == SNDRV_PCM_FORMAT_S16_LE)
 100                 hdmi->params[3] = 0;
 101         else
 102                 hdmi->params[3] = 0xc0;
 103         hdmi->params[4] = 1; /* ? */
 104         hdmi_write_command(chip, 0x54, 5, hdmi->params);
 105 }
 106 
 107 void xonar_hdmi_uart_input(struct oxygen *chip)
 108 {
 109         if (chip->uart_input_count >= 2 &&
 110             chip->uart_input[chip->uart_input_count - 2] == 'O' &&
 111             chip->uart_input[chip->uart_input_count - 1] == 'K') {
 112                 dev_dbg(chip->card->dev, "message from HDMI chip received:\n");
 113                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 114                                      chip->uart_input, chip->uart_input_count);
 115                 chip->uart_input_count = 0;
 116         }
 117 }