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122 lines
3.2 KiB
122 lines
3.2 KiB
/************************************************************************ |
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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 <[email protected]> |
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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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dev_dbg(chip->card->dev, |
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"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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dev_dbg(chip->card->dev, |
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"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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