sound/pci/echoaudio/mona_dsp.c

Source file repositories/reference/linux-study-clean/sound/pci/echoaudio/mona_dsp.c

File Facts

System
Linux kernel
Corpus path
sound/pci/echoaudio/mona_dsp.c
Extension
.c
Size
10150 bytes
Lines
408
Domain
Driver Families
Bucket
sound/pci
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 write_control_reg(struct echoaudio *chip, u32 value, char force);
static int set_input_clock(struct echoaudio *chip, u16 clock);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_digital_mode(struct echoaudio *chip, u8 mode);
static int load_asic_generic(struct echoaudio *chip, u32 cmd, short asic);
static int check_asic_status(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) != MONA))
		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->input_clock_types =
		ECHO_CLOCK_BIT_INTERNAL | ECHO_CLOCK_BIT_SPDIF |
		ECHO_CLOCK_BIT_WORD | ECHO_CLOCK_BIT_ADAT;
	chip->digital_modes =
		ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_RCA |
		ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_OPTICAL |
		ECHOCAPS_HAS_DIGITAL_MODE_ADAT;

	/* Mona comes in both '301 and '361 flavors */
	if (chip->device_id == DEVICE_ID_56361)
		chip->dsp_code_to_load = FW_MONA_361_DSP;
	else
		chip->dsp_code_to_load = FW_MONA_301_DSP;

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

	return err;
}



static int set_mixer_defaults(struct echoaudio *chip)
{
	chip->digital_mode = DIGITAL_MODE_SPDIF_RCA;
	chip->professional_spdif = false;
	chip->digital_in_automute = true;
	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 & GML_CLOCK_DETECT_BIT_SPDIF)
		clock_bits |= ECHO_CLOCK_BIT_SPDIF;

	if (clocks_from_dsp & GML_CLOCK_DETECT_BIT_ADAT)
		clock_bits |= ECHO_CLOCK_BIT_ADAT;

Annotation

Implementation Notes