kernel/sound/pci/oxygen/xonar_hdmi.c

   1 /*
   2  * helper functions for HDMI models (Xonar HDAV1.3/HDAV1.3 Slim)
   3  *
   4  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   5  *
   6  *
   7  *  This driver is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License, version 2.
   9  *
  10  *  This driver is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this driver; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/pci.h>
  20 #include <linux/delay.h>
  21 #include <sound/asoundef.h>
  22 #include <sound/control.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/tlv.h>
  27 #include "xonar.h"
  28
  29 static void hdmi_write_command(struct oxygen *chip, u8 command,
  30                                unsigned int count, const u8 *params)
  31 {
  32         unsigned int i;
  33         u8 checksum;
  34
  35         oxygen_write_uart(chip, 0xfb);
  36         oxygen_write_uart(chip, 0xef);
  37         oxygen_write_uart(chip, command);
  38         oxygen_write_uart(chip, count);
  39         for (i = 0; i < count; ++i)
  40                 oxygen_write_uart(chip, params[i]);
  41         checksum = 0xfb + 0xef + command + count;
  42         for (i = 0; i < count; ++i)
  43                 checksum += params[i];
  44         oxygen_write_uart(chip, checksum);
  45 }
  46
  47 static void xonar_hdmi_init_commands(struct oxygen *chip,
  48                                      struct xonar_hdmi *hdmi)
  49 {
  50         u8 param;
  51
  52         oxygen_reset_uart(chip);
  53         param = 0;
  54         hdmi_write_command(chip, 0x61, 1, &param);
  55         param = 1;
  56         hdmi_write_command(chip, 0x74, 1, &param);
  57         hdmi_write_command(chip, 0x54, 5, hdmi->params);
  58 }
  59
  60 void xonar_hdmi_init(struct oxygen *chip, struct xonar_hdmi *hdmi)
  61 {
  62         hdmi->params[1] = IEC958_AES3_CON_FS_48000;
  63         hdmi->params[4] = 1;
  64         xonar_hdmi_init_commands(chip, hdmi);
  65 }
  66
  67 void xonar_hdmi_cleanup(struct oxygen *chip)
  68 {
  69         u8 param = 0;
  70
  71         hdmi_write_command(chip, 0x74, 1, &param);
  72 }
  73
  74 void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
  75 {
  76         xonar_hdmi_init_commands(chip, hdmi);
  77 }
  78
  79 void xonar_hdmi_pcm_hardware_filter(unsigned int channel,
  80                                     struct snd_pcm_hardware *hardware)
  81 {
  82         if (channel == PCM_MULTICH) {
  83                 hardware->rates = SNDRV_PCM_RATE_44100 |
  84                                   SNDRV_PCM_RATE_48000 |
  85                                   SNDRV_PCM_RATE_96000 |
  86                                   SNDRV_PCM_RATE_192000;
  87                 hardware->rate_min = 44100;
  88         }
  89 }
  90
  91 void xonar_set_hdmi_params(struct oxygen *chip, struct xonar_hdmi *hdmi,
  92                            struct snd_pcm_hw_params *params)
  93 {
  94         hdmi->params[0] = 0; /* 1 = non-audio */
  95         switch (params_rate(params)) {
  96         case 44100:
  97                 hdmi->params[1] = IEC958_AES3_CON_FS_44100;
  98                 break;
  99         case 48000:
 100                 hdmi->params[1] = IEC958_AES3_CON_FS_48000;
 101                 break;
 102         default: /* 96000 */
 103                 hdmi->params[1] = IEC958_AES3_CON_FS_96000;
 104                 break;
 105         case 192000:
 106                 hdmi->params[1] = IEC958_AES3_CON_FS_192000;
 107                 break;
 108         }
 109         hdmi->params[2] = params_channels(params) / 2 - 1;
 110         if (params_format(params) == SNDRV_PCM_FORMAT_S16_LE)
 111                 hdmi->params[3] = 0;
 112         else
 113                 hdmi->params[3] = 0xc0;
 114         hdmi->params[4] = 1; /* ? */
 115         hdmi_write_command(chip, 0x54, 5, hdmi->params);
 116 }
 117
 118 void xonar_hdmi_uart_input(struct oxygen *chip)
 119 {
 120         if (chip->uart_input_count >= 2 &&
 121             chip->uart_input[chip->uart_input_count - 2] == 'O' &&
 122             chip->uart_input[chip->uart_input_count - 1] == 'K') {
 123                 dev_dbg(chip->card->dev, "message from HDMI chip received:\n");
 124                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 125                                      chip->uart_input, chip->uart_input_count);
 126                 chip->uart_input_count = 0;
 127         }
 128 }