// SPDX-License-Identifier: LGPL-2.1-or-later
/************************************************************************

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

 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;
}