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        DE_INIT(("init_hw() - Darla20\n"));
  37        snd_assert((subdevice_id & 0xfff0) == DARLA20, return -ENODEV);
  38
  39        if ((err = init_dsp_comm_page(chip))) {
  40                DE_INIT(("init_hw - could not initialize DSP comm page\n"));
  41                return err;
  42        }
  43
  44        chip->device_id = device_id;
  45        chip->subdevice_id = subdevice_id;
  46        chip->bad_board = TRUE;
  47        chip->dsp_code_to_load = &card_fw[FW_DARLA20_DSP];
  48        chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
  49        chip->clock_state = GD_CLOCK_UNDEF;
  50        /* Since this card has no ASIC, mark it as loaded so everything
  51           works OK */
  52        chip->asic_loaded = TRUE;
  53        chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  54
  55        if ((err = load_firmware(chip)) < 0)
  56                return err;
  57        chip->bad_board = FALSE;
  58
  59        if ((err = init_line_levels(chip)) < 0)
  60                return err;
  61
  62        DE_INIT(("init_hw done\n"));
  63        return err;
  64}
  65
  66
  67
  68/* The Darla20 has no external clock sources */
  69static u32 detect_input_clocks(const struct echoaudio *chip)
  70{
  71        return ECHO_CLOCK_BIT_INTERNAL;
  72}
  73
  74
  75
  76/* The Darla20 has no ASIC. Just do nothing */
  77static int load_asic(struct echoaudio *chip)
  78{
  79        return 0;
  80}
  81
  82
  83
  84static int set_sample_rate(struct echoaudio *chip, u32 rate)
  85{
  86        u8 clock_state, spdif_status;
  87
  88        if (wait_handshake(chip))
  89                return -EIO;
  90
  91        switch (rate) {
  92        case 44100:
  93                clock_state = GD_CLOCK_44;
  94                spdif_status = GD_SPDIF_STATUS_44;
  95                break;
  96        case 48000:
  97                clock_state = GD_CLOCK_48;
  98                spdif_status = GD_SPDIF_STATUS_48;
  99                break;
 100        default:
 101                clock_state = GD_CLOCK_NOCHANGE;
 102                spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 103                break;
 104        }
 105
 106        if (chip->clock_state == clock_state)
 107                clock_state = GD_CLOCK_NOCHANGE;
 108        if (spdif_status == chip->spdif_status)
 109                spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 110
 111        chip->comm_page->sample_rate = cpu_to_le32(rate);
 112        chip->comm_page->gd_clock_state = clock_state;
 113        chip->comm_page->gd_spdif_status = spdif_status;
 114        chip->comm_page->gd_resampler_state = 3;        /* magic number - should always be 3 */
 115
 116        /* Save the new audio state if it changed */
 117        if (clock_state != GD_CLOCK_NOCHANGE)
 118                chip->clock_state = clock_state;
 119        if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
 120                chip->spdif_status = spdif_status;
 121        chip->sample_rate = rate;
 122
 123        clear_handshake(chip);
 124        return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
 125}
 126