// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************

   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
   All rights reserved
   www.echoaudio.com

   This file is part of Echo Digital Audio's generic driver library.
   *************************************************************************

 Translation from C++ and adaptation for use in ALSA-Driver
 were made by Giuliano Pochini <pochini@shiny.it>

****************************************************************************/


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;

        if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_IO))
                return -ENODEV;

        err = init_dsp_comm_page(chip);
        if (err) {
                dev_err(chip->card->dev,
                        "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 = 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;

        err = load_firmware(chip);
        if (err < 0)
                return err;
        chip->bad_board = false;

        return err;
}



static int set_mixer_defaults(struct echoaudio *chip)
{
        return init_line_levels(chip);
}



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;
}



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);
        clear_handshake(chip);
        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;

        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);
}