/************************************************************************
This file is part of Echo Digital Audio ' s generic driver library .
Copyright Echo Digital Audio Corporation ( c ) 1998 - 2005
All rights reserved
www . echoaudio . com
This library is free software ; you can redistribute it and / or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation ; either
version 2 . 1 of the License , or ( at your option ) any later version .
This library is distributed in the hope that it will be useful ,
but WITHOUT ANY WARRANTY ; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
Lesser General Public License for more details .
You should have received a copy of the GNU Lesser General Public
License along with this library ; 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 < pochini @ shiny . it >
*************************************************************************/
static int set_sample_rate(struct echoaudio *chip, u32 rate)
{
u32 clock, control_reg, old_control_reg;
if (wait_handshake(chip))
return -EIO;
old_control_reg = le32_to_cpu(chip->comm_page->control_register);
control_reg = old_control_reg & ~INDIGO_EXPRESS_CLOCK_MASK;
switch (rate) {
case 32000 :
clock = INDIGO_EXPRESS_32000;
break ;
case 44100 :
clock = INDIGO_EXPRESS_44100;
break ;
case 48000 :
clock = INDIGO_EXPRESS_48000;
break ;
case 64000 :
clock = INDIGO_EXPRESS_32000|INDIGO_EXPRESS_DOUBLE_SPEED;
break ;
case 88200 :
clock = INDIGO_EXPRESS_44100|INDIGO_EXPRESS_DOUBLE_SPEED;
break ;
case 96000 :
clock = INDIGO_EXPRESS_48000|INDIGO_EXPRESS_DOUBLE_SPEED;
break ;
default :
return -EINVAL;
}
control_reg |= clock;
if (control_reg != old_control_reg) {
dev_dbg(chip->card->dev,
"set_sample_rate: %d clock %d\n" , rate, clock);
chip->comm_page->control_register = cpu_to_le32(control_reg);
chip->sample_rate = rate;
clear_handshake(chip);
return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
}
return 0 ;
}
/* 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;
if (snd_BUG_ON(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;
dev_dbg(chip->card->dev,
"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;
clear_handshake(chip);
return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
}
static u32 detect_input_clocks(const struct echoaudio *chip)
{
return ECHO_CLOCK_BIT_INTERNAL;
}
/* The IndigoIO has no ASIC. Just do nothing */
static int load_asic(struct echoaudio *chip)
{
return 0 ;
}
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