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Copyright Echo Digital Audio Corporation (c) 1998 - 2004
All rights reserved
This file is part of Echo Digital Audio's generic driver library.
Echo Digital Audio's generic driver library is free software;
you can redistribute it and/or modify it under the terms of
the GNU General Public License as published by the Free Software
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA.
Translation from C++ and adaptation for use in ALSA-Driver
were made by Giuliano Pochini <>
static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
int gain);
static int update_vmixer_level(struct echoaudio *chip);
static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
int err;
DE_INIT(("init_hw() - Indigo IO\n"));
snd_assert((subdevice_id & 0xfff0) == INDIGO_IO, return -ENODEV);
if ((err = init_dsp_comm_page(chip))) {
DE_INIT(("init_hw - could not initialize DSP comm page\n"));
return err;
chip->device_id = device_id;
chip->subdevice_id = subdevice_id;
chip->bad_board = TRUE;
chip->dsp_code_to_load = &card_fw[FW_INDIGO_IO_DSP];
/* Since this card has no ASIC, mark it as loaded so everything
works OK */
chip->asic_loaded = TRUE;
chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
if ((err = load_firmware(chip)) < 0)
return err;
chip->bad_board = FALSE;
if ((err = init_line_levels(chip)) < 0)
return err;
/* Default routing of the virtual channels: all vchannels are routed
to the stereo output */
set_vmixer_gain(chip, 0, 0, 0);
set_vmixer_gain(chip, 1, 1, 0);
set_vmixer_gain(chip, 0, 2, 0);
set_vmixer_gain(chip, 1, 3, 0);
set_vmixer_gain(chip, 0, 4, 0);
set_vmixer_gain(chip, 1, 5, 0);
set_vmixer_gain(chip, 0, 6, 0);
set_vmixer_gain(chip, 1, 7, 0);
err = update_vmixer_level(chip);
DE_INIT(("init_hw done\n"));
return err;
static u32 detect_input_clocks(const struct echoaudio *chip)
/* The IndigoIO has no ASIC. Just do nothing */
static int load_asic(struct echoaudio *chip)
return 0;
static int set_sample_rate(struct echoaudio *chip, u32 rate)
if (wait_handshake(chip))
return -EIO;
chip->sample_rate = rate;
chip->comm_page->sample_rate = cpu_to_le32(rate);
return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
/* This function routes the sound from a virtual channel to a real output */
static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
int gain)
int index;
snd_assert(pipe < num_pipes_out(chip) &&
output < num_busses_out(chip), return -EINVAL);
if (wait_handshake(chip))
return -EIO;
chip->vmixer_gain[output][pipe] = gain;
index = output * num_pipes_out(chip) + pipe;
chip->comm_page->vmixer[index] = gain;
DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
return 0;
/* Tell the DSP to read and update virtual mixer levels in comm page. */
static int update_vmixer_level(struct echoaudio *chip)
if (wait_handshake(chip))
return -EIO;
return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);