121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/************************************************************************
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This file is part of Echo Digital Audio's generic driver library.
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Copyright Echo Digital Audio Corporation (c) 1998 - 2005
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All rights reserved
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www.echoaudio.com
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*************************************************************************
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Translation from C++ and adaptation for use in ALSA-Driver
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were made by Giuliano Pochini <pochini@shiny.it>
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*************************************************************************/
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static int set_sample_rate(struct echoaudio *chip, u32 rate)
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{
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u32 clock, control_reg, old_control_reg;
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if (wait_handshake(chip))
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return -EIO;
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old_control_reg = le32_to_cpu(chip->comm_page->control_register);
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control_reg = old_control_reg & ~INDIGO_EXPRESS_CLOCK_MASK;
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switch (rate) {
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case 32000:
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clock = INDIGO_EXPRESS_32000;
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break;
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case 44100:
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clock = INDIGO_EXPRESS_44100;
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break;
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case 48000:
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clock = INDIGO_EXPRESS_48000;
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break;
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case 64000:
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clock = INDIGO_EXPRESS_32000|INDIGO_EXPRESS_DOUBLE_SPEED;
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break;
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case 88200:
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clock = INDIGO_EXPRESS_44100|INDIGO_EXPRESS_DOUBLE_SPEED;
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break;
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case 96000:
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clock = INDIGO_EXPRESS_48000|INDIGO_EXPRESS_DOUBLE_SPEED;
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break;
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default:
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return -EINVAL;
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}
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control_reg |= clock;
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if (control_reg != old_control_reg) {
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DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
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chip->comm_page->control_register = cpu_to_le32(control_reg);
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chip->sample_rate = rate;
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clear_handshake(chip);
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return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
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}
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return 0;
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}
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/* This function routes the sound from a virtual channel to a real output */
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static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
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int gain)
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{
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int index;
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if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
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output >= num_busses_out(chip)))
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return -EINVAL;
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if (wait_handshake(chip))
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return -EIO;
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chip->vmixer_gain[output][pipe] = gain;
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index = output * num_pipes_out(chip) + pipe;
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chip->comm_page->vmixer[index] = gain;
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DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
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return 0;
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}
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/* Tell the DSP to read and update virtual mixer levels in comm page. */
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static int update_vmixer_level(struct echoaudio *chip)
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{
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if (wait_handshake(chip))
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return -EIO;
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clear_handshake(chip);
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return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
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}
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static u32 detect_input_clocks(const struct echoaudio *chip)
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{
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return ECHO_CLOCK_BIT_INTERNAL;
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}
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/* The IndigoIO has no ASIC. Just do nothing */
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static int load_asic(struct echoaudio *chip)
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{
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return 0;
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}
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