sound/soc/pxa/spitz.c

Source file repositories/reference/linux-study-clean/sound/soc/pxa/spitz.c

File Facts

System
Linux kernel
Corpus path
sound/soc/pxa/spitz.c
Extension
.c
Size
9256 bytes
Lines
326
Domain
Driver Families
Bucket
sound/soc
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-or-later
/*
 * spitz.c  --  SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
 *          Richard Purdie <richard@openedhand.com>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include "../codecs/wm8750.h"
#include "pxa2xx-i2s.h"

#define SPITZ_HP        0
#define SPITZ_MIC       1
#define SPITZ_LINE      2
#define SPITZ_HEADSET   3
#define SPITZ_HP_OFF    4
#define SPITZ_SPK_ON    0
#define SPITZ_SPK_OFF   1

 /* audio clock in Hz - rounded from 12.235MHz */
#define SPITZ_AUDIO_CLOCK 12288000

static int spitz_jack_func;
static int spitz_spk_func;
static struct gpio_desc *gpiod_mic, *gpiod_mute_l, *gpiod_mute_r;

static void spitz_ext_control(struct snd_soc_dapm_context *dapm)
{
	snd_soc_dapm_mutex_lock(dapm);

	if (spitz_spk_func == SPITZ_SPK_ON)
		snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
	else
		snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");

	/* set up jack connection */
	switch (spitz_jack_func) {
	case SPITZ_HP:
		/* enable and unmute hp jack, disable mic bias */
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
		snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
		gpiod_set_value(gpiod_mute_l, 1);
		gpiod_set_value(gpiod_mute_r, 1);
		break;
	case SPITZ_MIC:
		/* enable mic jack and bias, mute hp */
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
		gpiod_set_value(gpiod_mute_l, 0);
		gpiod_set_value(gpiod_mute_r, 0);
		break;
	case SPITZ_LINE:
		/* enable line jack, disable mic bias and mute hp */
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
		snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
		gpiod_set_value(gpiod_mute_l, 0);
		gpiod_set_value(gpiod_mute_r, 0);
		break;
	case SPITZ_HEADSET:
		/* enable and unmute headset jack enable mic bias, mute L hp */
		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
		snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
		gpiod_set_value(gpiod_mute_l, 0);
		gpiod_set_value(gpiod_mute_r, 1);
		break;
	case SPITZ_HP_OFF:

		/* jack removed, everything off */

Annotation

Implementation Notes