Contributors: 7
Author Tokens Token Proportion Commits Commit Proportion
Giuliano Pochini 659 86.03% 2 20.00%
Takashi Iwai 82 10.70% 3 30.00%
Sudip Mukherjee 11 1.44% 1 10.00%
Jaroslav Kysela 6 0.78% 1 10.00%
Mark Brown 4 0.52% 1 10.00%
Bird, Timothy 2 0.26% 1 10.00%
Harvey Harrison 2 0.26% 1 10.00%
Total 766 10 


// 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_input_clock(struct echoaudio *chip, u16 clock);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int update_flags(struct echoaudio *chip);
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) != MIA))
		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_MIA_DSP;
	/* Since this card has no ASIC, mark it as loaded so everything
	   works OK */
	chip->asic_loaded = true;
	if ((subdevice_id & 0x0000f) == MIA_MIDI_REV)
		chip->has_midi = 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)
{
	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 Mia 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)
{
	u32 control_reg;

	switch (rate) {
	case 96000:
		control_reg = MIA_96000;
		break;
	case 88200:
		control_reg = MIA_88200;
		break;
	case 48000:
		control_reg = MIA_48000;
		break;
	case 44100:
		control_reg = MIA_44100;
		break;
	case 32000:
		control_reg = MIA_32000;
		break;
	default:
		dev_err(chip->card->dev,
			"set_sample_rate: %d invalid!\n", rate);
		return -EINVAL;
	}

	/* Override the clock setting if this Mia is set to S/PDIF clock */
	if (chip->input_clock == ECHO_CLOCK_SPDIF)
		control_reg |= MIA_SPDIF;

	/* Set the control register if it has changed */
	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
		if (wait_handshake(chip))
			return -EIO;

		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
		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;
}



static int set_input_clock(struct echoaudio *chip, u16 clock)
{
	dev_dbg(chip->card->dev, "set_input_clock(%d)\n", clock);
	if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
		       clock != ECHO_CLOCK_SPDIF))
		return -EINVAL;

	chip->input_clock = clock;
	return set_sample_rate(chip, chip->sample_rate);
}



/* 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);
}



/* 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)
{
	dev_dbg(chip->card->dev, "set_professional_spdif %d\n", 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);
}