132 строки
3.4 KiB
C
132 строки
3.4 KiB
C
/****************************************************************************
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Copyright Echo Digital Audio Corporation (c) 1998 - 2004
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All rights reserved
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www.echoaudio.com
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This file is part of Echo Digital Audio's generic driver library.
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Echo Digital Audio's generic driver library is free software;
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you can redistribute it and/or modify it under the terms of
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the GNU General Public License as published by the Free Software
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Foundation.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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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_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
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int gain);
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static int update_vmixer_level(struct echoaudio *chip);
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static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
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{
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int err;
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DE_INIT(("init_hw() - Indigo IO\n"));
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if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_IO))
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return -ENODEV;
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if ((err = init_dsp_comm_page(chip))) {
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DE_INIT(("init_hw - could not initialize DSP comm page\n"));
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return err;
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}
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chip->device_id = device_id;
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chip->subdevice_id = subdevice_id;
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chip->bad_board = TRUE;
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chip->dsp_code_to_load = &card_fw[FW_INDIGO_IO_DSP];
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/* Since this card has no ASIC, mark it as loaded so everything
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works OK */
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chip->asic_loaded = TRUE;
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chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
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if ((err = load_firmware(chip)) < 0)
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return err;
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chip->bad_board = FALSE;
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if ((err = init_line_levels(chip)) < 0)
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return err;
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DE_INIT(("init_hw done\n"));
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return err;
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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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static int set_sample_rate(struct echoaudio *chip, u32 rate)
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{
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if (wait_handshake(chip))
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return -EIO;
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chip->sample_rate = rate;
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chip->comm_page->sample_rate = cpu_to_le32(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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/* 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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