LXR linux/sound/pci/oxygen/xonar

   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
  29static 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
  47static 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
  60void 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
  67void xonar_hdmi_cleanup(struct oxygen *chip)
  68{
  69        u8 param = 0;
  70
  71        hdmi_write_command(chip, 0x74, 1, &param);
  72}
  73
  74void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
  75{
  76        xonar_hdmi_init_commands(chip, hdmi);
  77}
  78
  79void 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
  91void 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
 118void 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                printk(KERN_DEBUG "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}
 129