// 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_professional_spdif(struct echoaudio *chip, char prof);
static int update_flags(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) != GINA20))
                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_GINA20_DSP;
        chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
        chip->clock_state = GD_CLOCK_UNDEF;
        /* 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 |
                ECHO_CLOCK_BIT_SPDIF;

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

        return err;
}



static int set_mixer_defaults(struct echoaudio *chip)
{
        chip->professional_spdif = false;
        return init_line_levels(chip);
}



static u32 detect_input_clocks(const struct echoaudio *chip)
{
        u32 clocks_from_dsp, clock_bits;

        /* Map the DSP clock detect bits to the generic driver clock
           detect bits */
        clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);

        clock_bits = ECHO_CLOCK_BIT_INTERNAL;

        if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SPDIF)
                clock_bits |= ECHO_CLOCK_BIT_SPDIF;

        return clock_bits;
}



/* The Gina20 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)
{
        u8 clock_state, spdif_status;

        if (wait_handshake(chip))
                return -EIO;

        switch (rate) {
        case 44100:
                clock_state = GD_CLOCK_44;
                spdif_status = GD_SPDIF_STATUS_44;
                break;
        case 48000:
                clock_state = GD_CLOCK_48;
                spdif_status = GD_SPDIF_STATUS_48;
                break;
        default:
                clock_state = GD_CLOCK_NOCHANGE;
                spdif_status = GD_SPDIF_STATUS_NOCHANGE;
                break;
        }

        if (chip->clock_state == clock_state)
                clock_state = GD_CLOCK_NOCHANGE;
        if (spdif_status == chip->spdif_status)
                spdif_status = GD_SPDIF_STATUS_NOCHANGE;

        chip->comm_page->sample_rate = cpu_to_le32(rate);
        chip->comm_page->gd_clock_state = clock_state;
        chip->comm_page->gd_spdif_status = spdif_status;
        chip->comm_page->gd_resampler_state = 3;        /* magic number - should always be 3 */

        /* Save the new audio state if it changed */
        if (clock_state != GD_CLOCK_NOCHANGE)
                chip->clock_state = clock_state;
        if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
                chip->spdif_status = spdif_status;
        chip->sample_rate = rate;

        clear_handshake(chip);
        return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
}



static int set_input_clock(struct echoaudio *chip, u16 clock)
{

        switch (clock) {
        case ECHO_CLOCK_INTERNAL:
                /* Reset the audio state to unknown (just in case) */
                chip->clock_state = GD_CLOCK_UNDEF;
                chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
                set_sample_rate(chip, chip->sample_rate);
                chip->input_clock = clock;
                break;
        case ECHO_CLOCK_SPDIF:
                chip->comm_page->gd_clock_state = GD_CLOCK_SPDIFIN;
                chip->comm_page->gd_spdif_status = GD_SPDIF_STATUS_NOCHANGE;
                clear_handshake(chip);
                send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
                chip->clock_state = GD_CLOCK_SPDIFIN;
                chip->input_clock = clock;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}



/* Set input bus gain (one unit is 0.5dB !) */
static int set_input_gain(struct echoaudio *chip, u16 input, int gain)
{
        if (snd_BUG_ON(input >= num_busses_in(chip)))
                return -EINVAL;

        if (wait_handshake(chip))
                return -EIO;

        chip->input_gain[input] = gain;
        gain += GL20_INPUT_GAIN_MAGIC_NUMBER;
        chip->comm_page->line_in_level[input] = gain;
        return 0;
}



/* Tell the DSP to reread the flags from the comm page */
static int update_flags(struct echoaudio *chip)
{
        if (wait_handshake(chip))
                return -EIO;
        clear_handshake(chip);
        return send_vector(chip, DSP_VC_UPDATE_FLAGS);
}



static int set_professional_spdif(struct echoaudio *chip, char prof)
{
        if (prof)
                chip->comm_page->flags |=
                        cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
        else
                chip->comm_page->flags &=
                        ~cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
        chip->professional_spdif = prof;
        return update_flags(chip);
}