linux/sound/pci/echoaudio/indigo_dsp.c
<<
>>
Prefs
   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 set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
  33                           int gain);
  34static int update_vmixer_level(struct echoaudio *chip);
  35
  36
  37static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
  38{
  39        int err;
  40
  41        DE_INIT(("init_hw() - Indigo\n"));
  42        if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO))
  43                return -ENODEV;
  44
  45        if ((err = init_dsp_comm_page(chip))) {
  46                DE_INIT(("init_hw - could not initialize DSP comm page\n"));
  47                return err;
  48        }
  49
  50        chip->device_id = device_id;
  51        chip->subdevice_id = subdevice_id;
  52        chip->bad_board = TRUE;
  53        chip->dsp_code_to_load = FW_INDIGO_DSP;
  54        /* Since this card has no ASIC, mark it as loaded so everything
  55           works OK */
  56        chip->asic_loaded = TRUE;
  57        chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  58
  59        if ((err = load_firmware(chip)) < 0)
  60                return err;
  61        chip->bad_board = FALSE;
  62
  63        DE_INIT(("init_hw done\n"));
  64        return err;
  65}
  66
  67
  68
  69static int set_mixer_defaults(struct echoaudio *chip)
  70{
  71        return init_line_levels(chip);
  72}
  73
  74
  75
  76static u32 detect_input_clocks(const struct echoaudio *chip)
  77{
  78        return ECHO_CLOCK_BIT_INTERNAL;
  79}
  80
  81
  82
  83/* The Indigo has no ASIC. Just do nothing */
  84static int load_asic(struct echoaudio *chip)
  85{
  86        return 0;
  87}
  88
  89
  90
  91static int set_sample_rate(struct echoaudio *chip, u32 rate)
  92{
  93        u32 control_reg;
  94
  95        switch (rate) {
  96        case 96000:
  97                control_reg = MIA_96000;
  98                break;
  99        case 88200:
 100                control_reg = MIA_88200;
 101                break;
 102        case 48000:
 103                control_reg = MIA_48000;
 104                break;
 105        case 44100:
 106                control_reg = MIA_44100;
 107                break;
 108        case 32000:
 109                control_reg = MIA_32000;
 110                break;
 111        default:
 112                DE_ACT(("set_sample_rate: %d invalid!\n", rate));
 113                return -EINVAL;
 114        }
 115
 116        /* Set the control register if it has changed */
 117        if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
 118                if (wait_handshake(chip))
 119                        return -EIO;
 120
 121                chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP */
 122                chip->comm_page->control_register = cpu_to_le32(control_reg);
 123                chip->sample_rate = rate;
 124
 125                clear_handshake(chip);
 126                return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
 127        }
 128        return 0;
 129}
 130
 131
 132
 133/* This function routes the sound from a virtual channel to a real output */
 134static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
 135                           int gain)
 136{
 137        int index;
 138
 139        if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
 140                       output >= num_busses_out(chip)))
 141                return -EINVAL;
 142
 143        if (wait_handshake(chip))
 144                return -EIO;
 145
 146        chip->vmixer_gain[output][pipe] = gain;
 147        index = output * num_pipes_out(chip) + pipe;
 148        chip->comm_page->vmixer[index] = gain;
 149
 150        DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
 151        return 0;
 152}
 153
 154
 155
 156/* Tell the DSP to read and update virtual mixer levels in comm page. */
 157static int update_vmixer_level(struct echoaudio *chip)
 158{
 159        if (wait_handshake(chip))
 160                return -EIO;
 161        clear_handshake(chip);
 162        return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 163}
 164
 165