path: root/sound/soc/codecs/wm8350.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * wm8350.c -- WM8350 ALSA SoC audio driver
 *
 * Copyright (C) 2007-12 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/mfd/wm8350/audio.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <trace/events/asoc.h>

#include "wm8350.h"

#define WM8350_OUTn_0dB 0x39

#define WM8350_RAMP_NONE	0
#define WM8350_RAMP_UP		1
#define WM8350_RAMP_DOWN	2

/* We only include the analogue supplies here; the digital supplies
 * need to be available well before this driver can be probed.
 */
static const char *supply_names[] = {
	"AVDD",
	"HPVDD",
};

struct wm8350_output {
	u16 active;
	u16 left_vol;
	u16 right_vol;
	u16 ramp;
	u16 mute;
};

struct wm8350_jack_data {
	struct snd_soc_jack *jack;
	struct delayed_work work;
	int report;
	int short_report;
};

struct wm8350_data {
	struct wm8350 *wm8350;
	struct wm8350_output out1;
	struct wm8350_output out2;
	struct wm8350_jack_data hpl;
	struct wm8350_jack_data hpr;
	struct wm8350_jack_data mic;
	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
	int fll_freq_out;
	int fll_freq_in;
	struct delayed_work pga_work;
};

/*
 * Ramp OUT1 PGA volume to minimise pops at stream startup and shutdown.
 */
static inline int wm8350_out1_ramp_step(struct wm8350_data *wm8350_data)
{
	struct wm8350_output *out1 = &wm8350_data->out1;
	struct wm8350 *wm8350 = wm8350_data->wm8350;
	int left_complete = 0, right_complete = 0;
	u16 reg, val;

	/* left channel */
	reg = wm8350_reg_read(wm8350, WM8350_LOUT1_VOLUME);
	val = (reg & WM8350_OUT1L_VOL_MASK) >> WM8350_OUT1L_VOL_SHIFT;

	if (out1->ramp == WM8350_RAMP_UP) {
		/* ramp step up */
		if (val < out1->left_vol) {
			val++;
			reg &= ~WM8350_OUT1L_VOL_MASK;
			wm8350_reg_write(wm8350, WM8350_LOUT1_VOLUME,
					 reg | (val << WM8350_OUT1L_VOL_SHIFT));
		} else
			left_complete = 1;
	} else if (out1->ramp == WM8350_RAMP_DOWN) {
		/* ramp step down */
		if (val > 0) {
			val--;
			reg &= ~WM8350_OUT1L_VOL_MASK;
			wm8350_reg_write(wm8350, WM8350_LOUT1_VOLUME,
					 reg | (val << WM8350_OUT1L_VOL_SHIFT));
		} else
			left_complete = 1;
	} else
		return 1;

	/* right channel */
	reg = wm8350_reg_read(wm8350, WM8350_ROUT1_VOLUME);
	val = (reg & WM8350_OUT1R_VOL_MASK) >> WM8350_OUT1R_VOL_SHIFT;
	if (out1->ramp == WM8350_RAMP_UP) {
		/* ramp step up */
		if (val < out1->right_vol) {
			val++;
			reg &= ~WM8350_OUT1R_VOL_MASK;
			wm8350_reg_write(wm8350, WM8350_ROUT1_VOLUME,
					 reg | (val << WM8350_OUT1R_VOL_SHIFT));
		} else
			right_complete = 1;
	} else if (out1->ramp == WM8350_RAMP_DOWN) {
		/* ramp step down */
		if (val > 0) {
			val--;
			reg &= ~WM8350_OUT1R_VOL_MASK;
			wm8350_reg_write(wm8350, WM8350_ROUT1_VOLUME,
					 reg | (val << WM8350_OUT1R_VOL_SHIFT));
		} else
			right_complete = 1;
	}

	/* only hit the update bit if either volume has changed this step */
	if (!left_complete || !right_complete)
		wm8350_set_bits(wm8350, WM8350_LOUT1_VOLUME, WM8350_OUT1_VU);

	return left_complete & right_complete;
}

/*
 * Ramp OUT2 PGA volume to minimise pops at stream startup and shutdown.
 */
static inline int wm8350_out2_ramp_step(struct wm8350_data *wm8350_data)
{
	struct wm8350_output *out2 = &wm8350_data->out2;
	struct wm8350 *wm8350 = wm8350_data->wm8350;
	int left_complete = 0, right_complete = 0;
	u16 reg, val;

	/* left channel */
	reg = wm8350_reg_read(wm8350, WM8350_LOUT2_VOLUME);
	val = (reg & WM8350_OUT2L_VOL_MASK) >> WM8350_OUT1L_VOL_SHIFT;
	if (out2->ramp == WM8350_RAMP_UP) {
		/* ramp step up */
		if (val < out2->left_vol) {
			val++;
			reg &= ~WM8350_OUT2L_VOL_MASK;
			wm8350_reg_write(wm8350, WM8350_LOUT2_VOLUME,
					 reg | (val &