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android_kernel_samsung_msm8976/sound/soc/codecs/wcd9xxx-common-v2.c
Banajit Goswami 8e73e3a4e8 ASoC: wcd9335: add support for ADSP sub-system restart 
Enable support for ADSP sub-system restart feature on
WCD9335 codec.

Change-Id: I113ba4d7c07562c8327df05603e7370b3247f3fb
Signed-off-by: Fred Oh <fred@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
2015-08-03 19:12:43 +05:30

796 lines
23 KiB
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/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/mfd/wcd9xxx/core.h>
#include <linux/mfd/wcd9xxx/wcd9xxx_registers.h>
#include "wcd9xxx-common-v2.h"
#define WCD_USLEEP_RANGE 50
static void (*clsh_state_fp[NUM_CLSH_STATES_V2])(struct snd_soc_codec *,
struct wcd_clsh_cdc_data *,
u8 req_state, bool en, int mode);
static const char *mode_to_str(int mode)
{
switch (mode) {
case CLS_H_NORMAL:
return "CLS_H_NORMAL";
case CLS_H_HIFI:
return "CLS_H_HIFI";
case CLS_H_LP:
return "CLS_H_LP";
case CLS_AB:
return "CLS_AB";
default:
return "CLS_H_INVALID";
};
}
static const char *state_to_str(u8 state, char *buf, size_t buflen)
{
int i;
int cnt = 0;
/*
* This array of strings should match with enum wcd_clsh_state_bit.
*/
const char *states[] = {
"STATE_EAR",
"STATE_HPH_L",
"STATE_HPH_R",
"STATE_LO",
};
if (state == WCD_CLSH_STATE_IDLE) {
snprintf(buf, buflen, "[STATE_IDLE]");
goto done;
}
buf[0] = '\0';
for (i = 0; i < ARRAY_SIZE(states); i++) {
if (!(state & (1 << i)))
continue;
cnt = snprintf(buf, buflen - cnt - 1, "%s%s%s", buf,
buf[0] == '\0' ? "[" : "|",
states[i]);
}
if (cnt > 0)
strlcat(buf + cnt, "]", buflen);
done:
if (buf[0] == '\0')
snprintf(buf, buflen, "[STATE_UNKNOWN]");
return buf;
}
static inline void
wcd_enable_clsh_block(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d, bool enable)
{
if ((enable && ++clsh_d->clsh_users == 1) ||
(!enable && --clsh_d->clsh_users == 0))
snd_soc_update_bits(codec, WCD9XXX_A_CDC_CLSH_CRC, 0x01,
(u8) enable);
dev_dbg(codec->dev, "%s: clsh_users %d, enable %d", __func__,
clsh_d->clsh_users, enable);
}
static inline bool wcd_clsh_enable_status(struct snd_soc_codec *codec)
{
return snd_soc_read(codec, WCD9XXX_A_CDC_CLSH_CRC) & 0x01;
}
static inline int wcd_clsh_get_int_mode(struct wcd_clsh_cdc_data *clsh_d,
int clsh_state)
{
int mode;
if ((clsh_state != WCD_CLSH_STATE_EAR) &&
(clsh_state != WCD_CLSH_STATE_HPHL) &&
(clsh_state != WCD_CLSH_STATE_HPHR) &&
(clsh_state != WCD_CLSH_STATE_LO))
mode = CLS_NONE;
else
mode = clsh_d->interpolator_modes[ffs(clsh_state)];
return mode;
}
static inline void wcd_clsh_set_int_mode(struct wcd_clsh_cdc_data *clsh_d,
int clsh_state, int mode)
{
if ((clsh_state != WCD_CLSH_STATE_EAR) &&
(clsh_state != WCD_CLSH_STATE_HPHL) &&
(clsh_state != WCD_CLSH_STATE_HPHR) &&
(clsh_state != WCD_CLSH_STATE_LO))
return;
clsh_d->interpolator_modes[ffs(clsh_state)] = mode;
}
static inline void wcd_clsh_set_buck_mode(struct snd_soc_codec *codec,
int mode)
{
if (mode == CLS_H_HIFI)
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x08, 0x08); /* set to HIFI */
else
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x08, 0x00); /* set to default */
}
static inline void wcd_clsh_set_flyback_mode(struct snd_soc_codec *codec,
int mode)
{
if (mode == CLS_H_HIFI)
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x04, 0x04); /* set to HIFI */
else
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x04, 0x00); /* set to Default */
}
static void wcd_clsh_buck_ctrl(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
int mode,
bool enable)
{
/* enable/disable buck */
if ((enable && (++clsh_d->buck_users == 1)) ||
(!enable && (--clsh_d->buck_users == 0)))
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
(1 << 7), (enable << 7));
dev_dbg(codec->dev, "%s: buck_users %d, enable %d, mode: %s",
__func__, clsh_d->buck_users, enable, mode_to_str(mode));
/*
* 500us sleep is required after buck enable/disable
* as per HW requirement
*/
usleep_range(500, 500 + WCD_USLEEP_RANGE);
}
static void wcd_clsh_flyback_ctrl(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
int mode,
bool enable)
{
struct wcd9xxx *wcd9xxx = dev_get_drvdata(codec->dev->parent);
struct wcd9xxx_reg_val bulk_reg[2];
u8 vneg[] = {0x00, 0x40};
/* enable/disable flyback */
if ((enable && (++clsh_d->flyback_users == 1)) ||
(!enable && (--clsh_d->flyback_users == 0))) {
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
(1 << 6), (enable << 6));
/* 100usec delay is needed as per HW requirement */
usleep_range(100, 110);
if (enable && (TASHA_IS_1_1(wcd9xxx->version))) {
wcd_clsh_set_flyback_mode(codec, CLS_H_HIFI);
snd_soc_update_bits(codec, WCD9XXX_FLYBACK_EN,
0x60, 0x40);
snd_soc_update_bits(codec, WCD9XXX_FLYBACK_EN,
0x10, 0x10);
vneg[0] = snd_soc_read(codec,
WCD9XXX_A_ANA_RX_SUPPLIES);
vneg[0] &= ~(0x40);
vneg[1] = vneg[0] | 0x40;
bulk_reg[0].reg = WCD9XXX_A_ANA_RX_SUPPLIES;
bulk_reg[0].buf = &vneg[0];
bulk_reg[0].bytes = 1;
bulk_reg[1].reg = WCD9XXX_A_ANA_RX_SUPPLIES;
bulk_reg[1].buf = &vneg[1];
bulk_reg[1].bytes = 1;
/* 500usec delay is needed as per HW requirement */
usleep_range(500, 510);
wcd9xxx_slim_bulk_write(wcd9xxx, bulk_reg, 2,
false);
snd_soc_update_bits(codec, WCD9XXX_FLYBACK_EN,
0x10, 0x00);
wcd_clsh_set_flyback_mode(codec, mode);
}
}
dev_dbg(codec->dev, "%s: flyback_users %d, enable %d, mode: %s",
__func__, clsh_d->flyback_users, enable, mode_to_str(mode));
/*
* 500us sleep is required after flyback enable/disable
* as per HW requirement
*/
usleep_range(500, 500 + WCD_USLEEP_RANGE);
}
static void wcd_clsh_set_hph_mode(struct snd_soc_codec *codec,
int mode)
{
u8 val;
switch (mode) {
case CLS_H_NORMAL:
case CLS_AB:
val = 0x00;
break;
case CLS_H_HIFI:
val = 0x08;
break;
case CLS_H_LP:
val = 0x04;
break;
};
snd_soc_update_bits(codec, WCD9XXX_A_ANA_HPH, 0x0C, val);
}
static void wcd_clsh_set_buck_regulator_mode(struct snd_soc_codec *codec,
int mode)
{
if (mode == CLS_AB)
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x02, 0x02);
else
snd_soc_update_bits(codec, WCD9XXX_A_ANA_RX_SUPPLIES,
0x02, 0x00);
}
static void wcd_clsh_state_lo(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (mode != CLS_AB) {
dev_err(codec->dev, "%s: LO cannot be in this mode: %d\n",
__func__, mode);
return;
}
if (is_enable) {
wcd_clsh_set_buck_regulator_mode(codec, mode);
wcd_clsh_set_buck_mode(codec, mode);
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, true);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, true);
} else {
wcd_clsh_buck_ctrl(codec, clsh_d, mode, false);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, false);
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_regulator_mode(codec, CLS_H_NORMAL);
}
}
static void wcd_clsh_state_hph_ear(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
int hph_mode;
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (is_enable) {
if (req_state == WCD_CLSH_STATE_EAR) {
/* If HPH is running in CLS-AB when
* EAR comes, let it continue to run
* in Class-AB, no need to enable Class-H
* for EAR.
*/
if (clsh_d->state & WCD_CLSH_STATE_HPHL)
hph_mode = wcd_clsh_get_int_mode(clsh_d,
WCD_CLSH_STATE_HPHL);
else if (clsh_d->state & WCD_CLSH_STATE_HPHR)
hph_mode = wcd_clsh_get_int_mode(clsh_d,
WCD_CLSH_STATE_HPHR);
if (hph_mode != CLS_AB)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x40);
}
if (req_state == WCD_CLSH_STATE_HPHL)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x40);
if (req_state == WCD_CLSH_STATE_HPHR)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x40);
if ((req_state == WCD_CLSH_STATE_HPHL) ||
(req_state == WCD_CLSH_STATE_HPHR)) {
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_set_buck_mode(codec, mode);
}
} else {
if (req_state == WCD_CLSH_STATE_EAR) {
/*
* If EAR goes away, disable EAR Channel Enable
* if HPH running in Class-H otherwise
* and if HPH requested mode is CLS_AB then
* no need to disable EAR channel enable bit.
*/
if (wcd_clsh_enable_status(codec))
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x00);
}
if (req_state == WCD_CLSH_STATE_HPHL)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x00);
if (req_state == WCD_CLSH_STATE_HPHR)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x00);
if ((req_state & WCD_CLSH_STATE_HPH_ST) &&
!wcd_clsh_enable_status(codec)) {
/* If Class-H is not enabled when HPH is turned
* off, enable it as EAR is in progress
*/
wcd_enable_clsh_block(codec, clsh_d, true);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x40);
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
}
}
}
static void wcd_clsh_state_ear_lo(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (is_enable && (req_state == WCD_CLSH_STATE_LO)) {
wcd_clsh_set_buck_regulator_mode(codec, CLS_AB);
} else {
if (req_state == WCD_CLSH_STATE_EAR)
goto end;
/* LO powerdown.
* If EAR Class-H is already enabled, just
* turn on regulator other enable Class-H
* configuration
*/
if (wcd_clsh_enable_status(codec)) {
wcd_clsh_set_buck_regulator_mode(codec,
CLS_H_NORMAL);
goto end;
}
wcd_enable_clsh_block(codec, clsh_d, true);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x40);
wcd_clsh_set_buck_regulator_mode(codec,
CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, mode);
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, true);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, true);
}
end:
return;
}
static void wcd_clsh_state_hph_lo(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
int hph_mode;
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (is_enable) {
/*
* If requested state is LO, put regulator
* in class-AB or if requested state is HPH,
* which means LO is already enabled, keep
* the regulator config the same at class-AB
* and just set the power modes for flyback
* and buck.
*/
if (req_state == WCD_CLSH_STATE_LO)
wcd_clsh_set_buck_regulator_mode(codec, CLS_AB);
else {
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_set_buck_mode(codec, mode);
}
} else {
if ((req_state == WCD_CLSH_STATE_HPHL) ||
(req_state == WCD_CLSH_STATE_HPHR)) {
/*
* If HPH is powering down first, then set the
* buck/flyback mode to default and keep the
* regulator at Class-AB
*/
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
} else {
/* LO powerdown.
* If HPH mode also is CLS-AB, no need
* to turn-on class-H, otherwise enable
* Class-H configuration.
*/
if (clsh_d->state & WCD_CLSH_STATE_HPHL)
hph_mode = wcd_clsh_get_int_mode(clsh_d,
WCD_CLSH_STATE_HPHL);
else if (clsh_d->state & WCD_CLSH_STATE_HPHR)
hph_mode = wcd_clsh_get_int_mode(clsh_d,
WCD_CLSH_STATE_HPHR);
if ((hph_mode == CLS_AB) ||
(hph_mode == CLS_NONE))
goto end;
/*
* If Class-H is already enabled (HPH ON and then
* LO ON), no need to turn on again, just set the
* regulator mode.
*/
if (wcd_clsh_enable_status(codec)) {
wcd_clsh_set_buck_regulator_mode(codec,
hph_mode);
goto end;
}
wcd_enable_clsh_block(codec, clsh_d, true);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_CLSH_K1_MSB,
0x0F, 0x00);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_CLSH_K1_LSB,
0xFF, 0xC0);
wcd_clsh_set_buck_regulator_mode(codec,
hph_mode);
if (clsh_d->state & WCD_CLSH_STATE_HPHL)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x40);
if (clsh_d->state & WCD_CLSH_STATE_HPHR)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x40);
wcd_clsh_set_hph_mode(codec, hph_mode);
}
}
end:
return;
}
static void wcd_clsh_state_hph_st(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (mode == CLS_AB)
return;
if (is_enable) {
if (req_state == WCD_CLSH_STATE_HPHL)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x40);
if (req_state == WCD_CLSH_STATE_HPHR)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x40);
} else {
if (req_state == WCD_CLSH_STATE_HPHL)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x00);
if (req_state == WCD_CLSH_STATE_HPHR)
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x00);
}
}
static void wcd_clsh_state_hph_r(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (mode == CLS_H_NORMAL) {
dev_err(codec->dev, "%s: Normal mode not applicable for hph_r\n",
__func__);
return;
}
if (is_enable) {
if (mode != CLS_AB) {
wcd_enable_clsh_block(codec, clsh_d, true);
/*
* These K1 values depend on the Headphone Impedance
* For now it is assumed to be 16 ohm
*/
snd_soc_update_bits(codec, WCD9XXX_A_CDC_CLSH_K1_MSB,
0x0F, 0x00);
snd_soc_update_bits(codec, WCD9XXX_A_CDC_CLSH_K1_LSB,
0xFF, 0xC0);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x40);
}
wcd_clsh_set_buck_regulator_mode(codec, mode);
wcd_clsh_set_buck_mode(codec, mode);
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, true);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, true);
wcd_clsh_set_hph_mode(codec, mode);
} else {
wcd_clsh_set_hph_mode(codec, CLS_H_NORMAL);
if (mode != CLS_AB) {
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
0x40, 0x00);
wcd_enable_clsh_block(codec, clsh_d, false);
}
/* buck and flyback set to default mode and disable */
wcd_clsh_buck_ctrl(codec, clsh_d, CLS_H_NORMAL, false);
wcd_clsh_flyback_ctrl(codec, clsh_d, CLS_H_NORMAL, false);
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_regulator_mode(codec, CLS_H_NORMAL);
}
}
static void wcd_clsh_state_hph_l(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (mode == CLS_H_NORMAL) {
dev_err(codec->dev, "%s: Normal mode not applicable for hph_l\n",
__func__);
return;
}
if (is_enable) {
if (mode != CLS_AB) {
wcd_enable_clsh_block(codec, clsh_d, true);
/*
* These K1 values depend on the Headphone Impedance
* For now it is assumed to be 16 ohm
*/
snd_soc_update_bits(codec, WCD9XXX_A_CDC_CLSH_K1_MSB,
0x0F, 0x00);
snd_soc_update_bits(codec, WCD9XXX_A_CDC_CLSH_K1_LSB,
0xFF, 0xC0);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x40);
}
wcd_clsh_set_buck_regulator_mode(codec, mode);
wcd_clsh_set_buck_mode(codec, mode);
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, true);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, true);
wcd_clsh_set_hph_mode(codec, mode);
} else {
wcd_clsh_set_hph_mode(codec, CLS_H_NORMAL);
if (mode != CLS_AB) {
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
0x40, 0x00);
wcd_enable_clsh_block(codec, clsh_d, false);
}
/* set buck and flyback to Default Mode */
wcd_clsh_buck_ctrl(codec, clsh_d, CLS_H_NORMAL, false);
wcd_clsh_flyback_ctrl(codec, clsh_d, CLS_H_NORMAL, false);
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_regulator_mode(codec, CLS_H_NORMAL);
}
}
static void wcd_clsh_state_ear(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
dev_dbg(codec->dev, "%s: mode: %s, %s\n", __func__, mode_to_str(mode),
is_enable ? "enable" : "disable");
if (mode != CLS_H_NORMAL) {
dev_err(codec->dev, "%s: mode: %s cannot be used for EAR\n",
__func__, mode_to_str(mode));
return;
}
if (is_enable) {
wcd_enable_clsh_block(codec, clsh_d, true);
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x40);
wcd_clsh_set_buck_mode(codec, mode);
wcd_clsh_set_flyback_mode(codec, mode);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, true);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, true);
} else {
snd_soc_update_bits(codec,
WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
0x40, 0x00);
wcd_enable_clsh_block(codec, clsh_d, false);
wcd_clsh_buck_ctrl(codec, clsh_d, mode, false);
wcd_clsh_flyback_ctrl(codec, clsh_d, mode, false);
wcd_clsh_set_flyback_mode(codec, CLS_H_NORMAL);
wcd_clsh_set_buck_mode(codec, CLS_H_NORMAL);
}
}
static void wcd_clsh_state_err(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *clsh_d,
u8 req_state, bool is_enable, int mode)
{
char msg[128];
dev_err(codec->dev,
"%s Wrong request for class H state machine requested to %s %s",
__func__, is_enable ? "enable" : "disable",
state_to_str(req_state, msg, sizeof(msg)));
WARN_ON(1);
}
/*
* Function: wcd_clsh_is_state_valid
* Params: state
* Description:
* Provides information on valid states of Class H configuration
*/
static bool wcd_clsh_is_state_valid(u8 state)
{
switch (state) {
case WCD_CLSH_STATE_IDLE:
case WCD_CLSH_STATE_EAR:
case WCD_CLSH_STATE_HPHL:
case WCD_CLSH_STATE_HPHR:
case WCD_CLSH_STATE_HPH_ST:
case WCD_CLSH_STATE_LO:
return true;
default:
return false;
};
}
/*
* Function: wcd_clsh_fsm
* Params: codec, cdc_clsh_d, req_state, req_type, clsh_event
* Description:
* This function handles PRE DAC and POST DAC conditions of different devices
* and updates class H configuration of different combination of devices
* based on validity of their states. cdc_clsh_d will contain current
* class h state information
*/
void wcd_clsh_fsm(struct snd_soc_codec *codec,
struct wcd_clsh_cdc_data *cdc_clsh_d,
u8 clsh_event, u8 req_state,
int int_mode)
{
u8 old_state, new_state;
char msg0[128], msg1[128];
switch (clsh_event) {
case WCD_CLSH_EVENT_PRE_DAC:
old_state = cdc_clsh_d->state;
new_state = old_state | req_state;
if (!wcd_clsh_is_state_valid(new_state)) {
dev_err(codec->dev,
"%s: Class-H not a valid new state: %s\n",
__func__,
state_to_str(new_state, msg0, sizeof(msg0)));
return;
}
if (new_state == old_state) {
dev_err(codec->dev,
"%s: Class-H already in requested state: %s\n",
__func__,
state_to_str(new_state, msg0, sizeof(msg0)));
return;
}
cdc_clsh_d->state = new_state;
wcd_clsh_set_int_mode(cdc_clsh_d, req_state, int_mode);
(*clsh_state_fp[new_state]) (codec, cdc_clsh_d, req_state,
CLSH_REQ_ENABLE, int_mode);
dev_dbg(codec->dev,
"%s: ClassH state transition from %s to %s\n",
__func__, state_to_str(old_state, msg0, sizeof(msg0)),
state_to_str(cdc_clsh_d->state, msg1, sizeof(msg1)));
break;
case WCD_CLSH_EVENT_POST_PA:
old_state = cdc_clsh_d->state;
new_state = old_state & (~req_state);
if (new_state < NUM_CLSH_STATES_V2) {
if (!wcd_clsh_is_state_valid(old_state)) {
dev_err(codec->dev,
"%s:Invalid old state:%s\n",
__func__,
state_to_str(old_state, msg0,
sizeof(msg0)));
return;
}
if (new_state == old_state) {
dev_err(codec->dev,
"%s: Class-H already in requested state: %s\n",
__func__,
state_to_str(new_state, msg0,
sizeof(msg0)));
return;
}
(*clsh_state_fp[old_state]) (codec, cdc_clsh_d,
req_state, CLSH_REQ_DISABLE,
int_mode);
cdc_clsh_d->state = new_state;
wcd_clsh_set_int_mode(cdc_clsh_d, req_state, CLS_NONE);
dev_dbg(codec->dev, "%s: ClassH state transition from %s to %s\n",
__func__, state_to_str(old_state, msg0,
sizeof(msg0)),
state_to_str(cdc_clsh_d->state, msg1,
sizeof(msg1)));
}
break;
};
}
void wcd_clsh_init(struct wcd_clsh_cdc_data *clsh)
{
int i;
clsh->state = WCD_CLSH_STATE_IDLE;
for (i = 0; i < NUM_CLSH_STATES_V2; i++)
clsh_state_fp[i] = wcd_clsh_state_err;
clsh_state_fp[WCD_CLSH_STATE_EAR] = wcd_clsh_state_ear;
clsh_state_fp[WCD_CLSH_STATE_HPHL] =
wcd_clsh_state_hph_l;
clsh_state_fp[WCD_CLSH_STATE_HPHR] =
wcd_clsh_state_hph_r;
clsh_state_fp[WCD_CLSH_STATE_HPH_ST] =
wcd_clsh_state_hph_st;
clsh_state_fp[WCD_CLSH_STATE_LO] = wcd_clsh_state_lo;
clsh_state_fp[WCD_CLSH_STATE_HPHL_EAR] =
wcd_clsh_state_hph_ear;
clsh_state_fp[WCD_CLSH_STATE_HPHR_EAR] =
wcd_clsh_state_hph_ear;
clsh_state_fp[WCD_CLSH_STATE_HPH_ST_EAR] =
wcd_clsh_state_hph_ear;
clsh_state_fp[WCD_CLSH_STATE_HPHL_LO] = wcd_clsh_state_hph_lo;
clsh_state_fp[WCD_CLSH_STATE_HPHR_LO] = wcd_clsh_state_hph_lo;
clsh_state_fp[WCD_CLSH_STATE_HPH_ST_LO] =
wcd_clsh_state_hph_lo;
clsh_state_fp[WCD_CLSH_STATE_EAR_LO] = wcd_clsh_state_ear_lo;
/* Set interpolaotr modes to NONE */
wcd_clsh_set_int_mode(clsh, WCD_CLSH_STATE_EAR, CLS_NONE);
wcd_clsh_set_int_mode(clsh, WCD_CLSH_STATE_HPHL, CLS_NONE);
wcd_clsh_set_int_mode(clsh, WCD_CLSH_STATE_HPHR, CLS_NONE);
wcd_clsh_set_int_mode(clsh, WCD_CLSH_STATE_LO, CLS_NONE);
}
EXPORT_SYMBOL(wcd_clsh_init);
MODULE_DESCRIPTION("WCD9XXX Common Driver");
MODULE_LICENSE("GPL v2");
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