LXR linux/sound/pci/echoaudio/darla20

   1/***************************************************************************
   2
   3   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
   4   All rights reserved
   5   www.echoaudio.com
   6
   7   This file is part of Echo Digital Audio's generic driver library.
   8
   9   Echo Digital Audio's generic driver library is free software;
  10   you can redistribute it and/or modify it under the terms of
  11   the GNU General Public License as published by the Free Software
  12   Foundation.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  22   MA  02111-1307, USA.
  23
  24   *************************************************************************
  25
  26 Translation from C++ and adaptation for use in ALSA-Driver
  27 were made by Giuliano Pochini <pochini@shiny.it>
  28
  29****************************************************************************/
  30
  31
  32static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
  33{
  34        int err;
  35
  36        if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20))
  37                return -ENODEV;
  38
  39        if ((err = init_dsp_comm_page(chip))) {
  40                dev_err(chip->card->dev,
  41                        "init_hw: could not initialize DSP comm page\n");
  42                return err;
  43        }
  44
  45        chip->device_id = device_id;
  46        chip->subdevice_id = subdevice_id;
  47        chip->bad_board = true;
  48        chip->dsp_code_to_load = FW_DARLA20_DSP;
  49        chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
  50        chip->clock_state = GD_CLOCK_UNDEF;
  51        /* Since this card has no ASIC, mark it as loaded so everything
  52           works OK */
  53        chip->asic_loaded = true;
  54        chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  55
  56        if ((err = load_firmware(chip)) < 0)
  57                return err;
  58        chip->bad_board = false;
  59
  60        return err;
  61}
  62
  63
  64
  65static int set_mixer_defaults(struct echoaudio *chip)
  66{
  67        return init_line_levels(chip);
  68}
  69
  70
  71
  72/* The Darla20 has no external clock sources */
  73static u32 detect_input_clocks(const struct echoaudio *chip)
  74{
  75        return ECHO_CLOCK_BIT_INTERNAL;
  76}
  77
  78
  79
  80/* The Darla20 has no ASIC. Just do nothing */
  81static int load_asic(struct echoaudio *chip)
  82{
  83        return 0;
  84}
  85
  86
  87
  88static int set_sample_rate(struct echoaudio *chip, u32 rate)
  89{
  90        u8 clock_state, spdif_status;
  91
  92        if (wait_handshake(chip))
  93                return -EIO;
  94
  95        switch (rate) {
  96        case 44100:
  97                clock_state = GD_CLOCK_44;
  98                spdif_status = GD_SPDIF_STATUS_44;
  99                break;
 100        case 48000:
 101                clock_state = GD_CLOCK_48;
 102                spdif_status = GD_SPDIF_STATUS_48;
 103                break;
 104        default:
 105                clock_state = GD_CLOCK_NOCHANGE;
 106                spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 107                break;
 108        }
 109
 110        if (chip->clock_state == clock_state)
 111                clock_state = GD_CLOCK_NOCHANGE;
 112        if (spdif_status == chip->spdif_status)
 113                spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 114
 115        chip->comm_page->sample_rate = cpu_to_le32(rate);
 116        chip->comm_page->gd_clock_state = clock_state;
 117        chip->comm_page->gd_spdif_status = spdif_status;
 118        chip->comm_page->gd_resampler_state = 3;        /* magic number - should always be 3 */
 119
 120        /* Save the new audio state if it changed */
 121        if (clock_state != GD_CLOCK_NOCHANGE)
 122                chip->clock_state = clock_state;
 123        if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
 124                chip->spdif_status = spdif_status;
 125        chip->sample_rate = rate;
 126
 127        clear_handshake(chip);
 128        return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
 129}
 130