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kernel/drivers/mfd/arizona-core.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Arizona core driver
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>
#include <linux/ktime.h>
#include <linux/platform_device.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/registers.h>
#include "arizona.h"
static const char * const wm5102_core_supplies[] = {
"AVDD",
"DBVDD1",
};
int arizona_clk32k_enable(struct arizona *arizona)
{
int ret = 0;
mutex_lock(&arizona->clk_lock);
arizona->clk32k_ref++;
if (arizona->clk32k_ref == 1) {
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
ret = pm_runtime_resume_and_get(arizona->dev);
if (ret != 0)
goto err_ref;
ret = clk_prepare_enable(arizona->mclk[ARIZONA_MCLK1]);
if (ret != 0) {
pm_runtime_put_sync(arizona->dev);
goto err_ref;
}
break;
case ARIZONA_32KZ_MCLK2:
ret = clk_prepare_enable(arizona->mclk[ARIZONA_MCLK2]);
if (ret != 0)
goto err_ref;
break;
}
ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA,
ARIZONA_CLK_32K_ENA);
}
err_ref:
if (ret != 0)
arizona->clk32k_ref--;
mutex_unlock(&arizona->clk_lock);
return ret;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_enable);
int arizona_clk32k_disable(struct arizona *arizona)
{
mutex_lock(&arizona->clk_lock);
WARN_ON(arizona->clk32k_ref <= 0);
arizona->clk32k_ref--;
if (arizona->clk32k_ref == 0) {
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA, 0);
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
pm_runtime_put_sync(arizona->dev);
clk_disable_unprepare(arizona->mclk[ARIZONA_MCLK1]);
break;
case ARIZONA_32KZ_MCLK2:
clk_disable_unprepare(arizona->mclk[ARIZONA_MCLK2]);
break;
}
}
mutex_unlock(&arizona->clk_lock);
return 0;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_disable);
static irqreturn_t arizona_clkgen_err(int irq, void *data)
{
struct arizona *arizona = data;
dev_err(arizona->dev, "CLKGEN error\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_underclocked(int irq, void *data)
{
struct arizona *arizona = data;
unsigned int val;
int ret;
ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
&val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read underclock status: %d\n",
ret);
return IRQ_NONE;
}
if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF3 underclocked\n");
if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF2 underclocked\n");
if (val & ARIZONA_AIF1_UNDERCLOCKED_STS)
dev_err(arizona->dev, "AIF1 underclocked\n");
if (val & ARIZONA_ISRC3_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ISRC3 underclocked\n");
if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ISRC2 underclocked\n");
if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ISRC1 underclocked\n");
if (val & ARIZONA_FX_UNDERCLOCKED_STS)
dev_err(arizona->dev, "FX underclocked\n");
if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ASRC underclocked\n");
if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "DAC underclocked\n");
if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
dev_err(arizona->dev, "ADC underclocked\n");
if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
dev_err(arizona->dev, "Mixer dropped sample\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_overclocked(int irq, void *data)
{
struct arizona *arizona = data;
unsigned int val[3];
int ret;
ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
&val[0], 3);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read overclock status: %d\n",
ret);
return IRQ_NONE;
}
switch (arizona->type) {
case WM8998:
case WM1814:
/* Some bits are shifted on WM8998,
* rearrange to match the standard bit layout
*/
val[0] = ((val[0] & 0x60e0) >> 1) |
((val[0] & 0x1e00) >> 2) |
(val[0] & 0x000f);
break;
default:
break;
}
if (val[0] & ARIZONA_PWM_OVERCLOCKED_STS)
dev_err(arizona->dev, "PWM overclocked\n");
if (val[0] & ARIZONA_FX_CORE_OVERCLOCKED_STS)
dev_err(arizona->dev, "FX core overclocked\n");
if (val[0] & ARIZONA_DAC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "DAC SYS overclocked\n");
if (val[0] & ARIZONA_DAC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "DAC WARP overclocked\n");
if (val[0] & ARIZONA_ADC_OVERCLOCKED_STS)
dev_err(arizona->dev, "ADC overclocked\n");
if (val[0] & ARIZONA_MIXER_OVERCLOCKED_STS)
dev_err(arizona->dev, "Mixer overclocked\n");
if (val[0] & ARIZONA_AIF3_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF3 overclocked\n");
if (val[0] & ARIZONA_AIF2_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF2 overclocked\n");
if (val[0] & ARIZONA_AIF1_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "AIF1 overclocked\n");
if (val[0] & ARIZONA_PAD_CTRL_OVERCLOCKED_STS)
dev_err(arizona->dev, "Pad control overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_SUBSYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus subsystem overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_ASYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus async overclocked\n");
if (val[1] & ARIZONA_SLIMBUS_SYNC_OVERCLOCKED_STS)
dev_err(arizona->dev, "Slimbus sync overclocked\n");
if (val[1] & ARIZONA_ASRC_ASYNC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC async system overclocked\n");
if (val[1] & ARIZONA_ASRC_ASYNC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC async WARP overclocked\n");
if (val[1] & ARIZONA_ASRC_SYNC_SYS_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC sync system overclocked\n");
if (val[1] & ARIZONA_ASRC_SYNC_WARP_OVERCLOCKED_STS)
dev_err(arizona->dev, "ASRC sync WARP overclocked\n");
if (val[1] & ARIZONA_ADSP2_1_OVERCLOCKED_STS)
dev_err(arizona->dev, "DSP1 overclocked\n");
if (val[1] & ARIZONA_ISRC3_OVERCLOCKED_STS)
dev_err(arizona->dev, "ISRC3 overclocked\n");
if (val[1] & ARIZONA_ISRC2_OVERCLOCKED_STS)
dev_err(arizona->dev, "ISRC2 overclocked\n");
if (val[1] & ARIZONA_ISRC1_OVERCLOCKED_STS)
dev_err(arizona->dev, "ISRC1 overclocked\n");
if (val[2] & ARIZONA_SPDIF_OVERCLOCKED_STS)
dev_err(arizona->dev, "SPDIF overclocked\n");
return IRQ_HANDLED;
}
#define ARIZONA_REG_POLL_DELAY_US 7500
static inline bool arizona_poll_reg_delay(ktime_t timeout)
{
if (ktime_compare(ktime_get(), timeout) > 0)
return false;
usleep_range(ARIZONA_REG_POLL_DELAY_US / 2, ARIZONA_REG_POLL_DELAY_US);
return true;
}
static int arizona_poll_reg(struct arizona *arizona,
int timeout_ms, unsigned int reg,
unsigned int mask, unsigned int target)
{
ktime_t timeout = ktime_add_us(ktime_get(), timeout_ms * USEC_PER_MSEC);
unsigned int val = 0;
int ret;
do {
ret = regmap_read(arizona->regmap, reg, &val);
if ((val & mask) == target)
return 0;
} while (arizona_poll_reg_delay(timeout));
if (ret) {
dev_err(arizona->dev, "Failed polling reg 0x%x: %d\n",
reg, ret);
return ret;
}
dev_err(arizona->dev, "Polling reg 0x%x timed out: %x\n", reg, val);
return -ETIMEDOUT;
}
static int arizona_wait_for_boot(struct arizona *arizona)
{
int ret;
/*
* We can't use an interrupt as we need to runtime resume to do so,
* we won't race with the interrupt handler as it'll be blocked on
* runtime resume.
*/
ret = arizona_poll_reg(arizona, 30, ARIZONA_INTERRUPT_RAW_STATUS_5,
ARIZONA_BOOT_DONE_STS, ARIZONA_BOOT_DONE_STS);
if (!ret)
regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
ARIZONA_BOOT_DONE_STS);
pm_runtime_mark_last_busy(arizona->dev);
return ret;
}
static inline void arizona_enable_reset(struct arizona *arizona)
{
if (arizona->pdata.reset)
gpiod_set_raw_value_cansleep(arizona->pdata.reset, 0);
}
static void arizona_disable_reset(struct arizona *arizona)
{
if (arizona->pdata.reset) {
switch (arizona->type) {
case WM5110:
case WM8280:
/* Meet requirements for minimum reset duration */
usleep_range(5000, 10000);
break;
default:
break;
}
gpiod_set_raw_value_cansleep(arizona->pdata.reset, 1);
usleep_range(1000, 5000);
}
}
struct arizona_sysclk_state {
unsigned int fll;
unsigned int sysclk;
};
static int arizona_enable_freerun_sysclk(struct arizona *arizona,
struct arizona_sysclk_state *state)
{
int ret, err;
/* Cache existing FLL and SYSCLK settings */
ret = regmap_read(arizona->regmap, ARIZONA_FLL1_CONTROL_1, &state->fll);
if (ret) {
dev_err(arizona->dev, "Failed to cache FLL settings: %d\n",
ret);
return ret;
}
ret = regmap_read(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1,
&state->sysclk);
if (ret) {
dev_err(arizona->dev, "Failed to cache SYSCLK settings: %d\n",
ret);
return ret;
}
/* Start up SYSCLK using the FLL in free running mode */
ret = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1,
ARIZONA_FLL1_ENA | ARIZONA_FLL1_FREERUN);
if (ret) {
dev_err(arizona->dev,
"Failed to start FLL in freerunning mode: %d\n",
ret);
return ret;
}
ret = arizona_poll_reg(arizona, 180, ARIZONA_INTERRUPT_RAW_STATUS_5,
ARIZONA_FLL1_CLOCK_OK_STS,
ARIZONA_FLL1_CLOCK_OK_STS);
if (ret)
goto err_fll;
ret = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, 0x0144);
if (ret) {
dev_err(arizona->dev, "Failed to start SYSCLK: %d\n", ret);
goto err_fll;
}
return 0;
err_fll:
err = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1, state->fll);
if (err)
dev_err(arizona->dev,
"Failed to re-apply old FLL settings: %d\n", err);
return ret;
}
static int arizona_disable_freerun_sysclk(struct arizona *arizona,
struct arizona_sysclk_state *state)
{
int ret;
ret = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1,
state->sysclk);
if (ret) {
dev_err(arizona->dev,
"Failed to re-apply old SYSCLK settings: %d\n", ret);
return ret;
}
ret = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1, state->fll);
if (ret) {
dev_err(arizona->dev,
"Failed to re-apply old FLL settings: %d\n", ret);
return ret;
}
return 0;
}
static int wm5102_apply_hardware_patch(struct arizona *arizona)
{
struct arizona_sysclk_state state;
int err, ret;
ret = arizona_enable_freerun_sysclk(arizona, &state);
if (ret)
return ret;
/* Start the write sequencer and wait for it to finish */
ret = regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ENA | ARIZONA_WSEQ_START | 160);
if (ret) {
dev_err(arizona->dev, "Failed to start write sequencer: %d\n",
ret);
goto err;
}
ret = arizona_poll_reg(arizona, 30, ARIZONA_WRITE_SEQUENCER_CTRL_1,
ARIZONA_WSEQ_BUSY, 0);
if (ret)
regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ABORT);
err:
err = arizona_disable_freerun_sysclk(arizona, &state);
return ret ?: err;
}
/*
* Register patch to some of the CODECs internal write sequences
* to ensure a clean exit from the low power sleep state.
*/
static const struct reg_sequence wm5110_sleep_patch[] = {
{ 0x337A, 0xC100 },
{ 0x337B, 0x0041 },
{ 0x3300, 0xA210 },
{ 0x3301, 0x050C },
};
static int wm5110_apply_sleep_patch(struct arizona *arizona)
{
struct arizona_sysclk_state state;
int err, ret;
ret = arizona_enable_freerun_sysclk(arizona, &state);
if (ret)
return ret;
ret = regmap_multi_reg_write_bypassed(arizona->regmap,
wm5110_sleep_patch,
ARRAY_SIZE(wm5110_sleep_patch));
err = arizona_disable_freerun_sysclk(arizona, &state);
return ret ?: err;
}
static int wm5102_clear_write_sequencer(struct arizona *arizona)
{
int ret;
ret = regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_3,
0x0);
if (ret) {
dev_err(arizona->dev,
"Failed to clear write sequencer state: %d\n", ret);
return ret;
}
arizona_enable_reset(arizona);
regulator_disable(arizona->dcvdd);
msleep(20);
ret = regulator_enable(arizona->dcvdd);
if (ret) {
dev_err(arizona->dev, "Failed to re-enable DCVDD: %d\n", ret);
return ret;
}
arizona_disable_reset(arizona);
return 0;
}
static int arizona_isolate_dcvdd(struct arizona *arizona)
{
int ret;
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ISOLATION_CONTROL,
ARIZONA_ISOLATE_DCVDD1,
ARIZONA_ISOLATE_DCVDD1);
if (ret != 0)
dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n", ret);
return ret;
}
static int arizona_connect_dcvdd(struct arizona *arizona)
{
int ret;
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ISOLATION_CONTROL,
ARIZONA_ISOLATE_DCVDD1, 0);
if (ret != 0)
dev_err(arizona->dev, "Failed to connect DCVDD: %d\n", ret);
return ret;
}
static int arizona_is_jack_det_active(struct arizona *arizona)
{
unsigned int val;
int ret;
ret = regmap_read(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE, &val);
if (ret) {
dev_err(arizona->dev,
"Failed to check jack det status: %d\n", ret);
return ret;
} else if (val & ARIZONA_JD1_ENA) {
return 1;
} else {
return 0;
}
}
static int arizona_runtime_resume(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
int ret;
dev_dbg(arizona->dev, "Leaving AoD mode\n");
if (arizona->has_fully_powered_off) {
dev_dbg(arizona->dev, "Re-enabling core supplies\n");
ret = regulator_bulk_enable(arizona->num_core_supplies,
arizona->core_supplies);
if (ret) {
dev_err(dev, "Failed to enable core supplies: %d\n",
ret);
return ret;
}
}
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret);
if (arizona->has_fully_powered_off)
regulator_bulk_disable(arizona->num_core_supplies,
arizona->core_supplies);
return ret;
}
if (arizona->has_fully_powered_off) {
arizona_disable_reset(arizona);
enable_irq(arizona->irq);
arizona->has_fully_powered_off = false;
}
regcache_cache_only(arizona->regmap, false);
switch (arizona->type) {
case WM5102:
if (arizona->external_dcvdd) {
ret = arizona_connect_dcvdd(arizona);
if (ret != 0)
goto err;
}
ret = wm5102_patch(arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to apply patch: %d\n",
ret);
goto err;
}
ret = wm5102_apply_hardware_patch(arizona);
if (ret) {
dev_err(arizona->dev,
"Failed to apply hardware patch: %d\n",
ret);
goto err;
}
break;
case WM5110:
case WM8280:
ret = arizona_wait_for_boot(arizona);
if (ret)
goto err;
if (arizona->external_dcvdd) {
ret = arizona_connect_dcvdd(arizona);
if (ret != 0)
goto err;
} else {
/*
* As this is only called for the internal regulator
* (where we know voltage ranges available) it is ok
* to request an exact range.
*/
ret = regulator_set_voltage(arizona->dcvdd,
1200000, 1200000);
if (ret < 0) {
dev_err(arizona->dev,
"Failed to set resume voltage: %d\n",
ret);
goto err;
}
}
ret = wm5110_apply_sleep_patch(arizona);
if (ret) {
dev_err(arizona->dev,
"Failed to re-apply sleep patch: %d\n",
ret);
goto err;
}
break;
case WM1831:
case CS47L24:
ret = arizona_wait_for_boot(arizona);
if (ret != 0)
goto err;
break;
default:
ret = arizona_wait_for_boot(arizona);
if (ret != 0)
goto err;
if (arizona->external_dcvdd) {
ret = arizona_connect_dcvdd(arizona);
if (ret != 0)
goto err;
}
break;
}
ret = regcache_sync(arizona->regmap);
if (ret != 0) {
dev_err(arizona->dev, "Failed to restore register cache\n");
goto err;
}
return 0;
err:
regcache_cache_only(arizona->regmap, true);
regulator_disable(arizona->dcvdd);
return ret;
}
static int arizona_runtime_suspend(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
int jd_active = 0;
int ret;
dev_dbg(arizona->dev, "Entering AoD mode\n");
switch (arizona->type) {
case WM5110:
case WM8280:
jd_active = arizona_is_jack_det_active(arizona);
if (jd_active < 0)
return jd_active;
if (arizona->external_dcvdd) {
ret = arizona_isolate_dcvdd(arizona);
if (ret != 0)
return ret;
} else {
/*
* As this is only called for the internal regulator
* (where we know voltage ranges available) it is ok
* to request an exact range.
*/
ret = regulator_set_voltage(arizona->dcvdd,
1175000, 1175000);
if (ret < 0) {
dev_err(arizona->dev,
"Failed to set suspend voltage: %d\n",
ret);
return ret;
}
}
break;
case WM5102:
jd_active = arizona_is_jack_det_active(arizona);
if (jd_active < 0)
return jd_active;
if (arizona->external_dcvdd) {
ret = arizona_isolate_dcvdd(arizona);
if (ret != 0)
return ret;
}
if (!jd_active) {
ret = regmap_write(arizona->regmap,
ARIZONA_WRITE_SEQUENCER_CTRL_3, 0x0);
if (ret) {
dev_err(arizona->dev,
"Failed to clear write sequencer: %d\n",
ret);
return ret;
}
}
break;
case WM1831:
case CS47L24:
break;
default:
jd_active = arizona_is_jack_det_active(arizona);
if (jd_active < 0)
return jd_active;
if (arizona->external_dcvdd) {
ret = arizona_isolate_dcvdd(arizona);
if (ret != 0)
return ret;
}
break;
}
regcache_cache_only(arizona->regmap, true);
regcache_mark_dirty(arizona->regmap);
regulator_disable(arizona->dcvdd);
/* Allow us to completely power down if no jack detection */
if (!jd_active) {
dev_dbg(arizona->dev, "Fully powering off\n");
arizona->has_fully_powered_off = true;
disable_irq_nosync(arizona->irq);
arizona_enable_reset(arizona);
regulator_bulk_disable(arizona->num_core_supplies,
arizona->core_supplies);
}
return 0;
}
static int arizona_suspend(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
dev_dbg(arizona->dev, "Suspend, disabling IRQ\n");
disable_irq(arizona->irq);
return 0;
}
static int arizona_suspend_noirq(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
dev_dbg(arizona->dev, "Late suspend, reenabling IRQ\n");
enable_irq(arizona->irq);
return 0;
}
static int arizona_resume_noirq(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
dev_dbg(arizona->dev, "Early resume, disabling IRQ\n");
disable_irq(arizona->irq);
return 0;
}
static int arizona_resume(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
dev_dbg(arizona->dev, "Resume, reenabling IRQ\n");
enable_irq(arizona->irq);
return 0;
}
EXPORT_GPL_DEV_PM_OPS(arizona_pm_ops) = {
RUNTIME_PM_OPS(arizona_runtime_suspend,
arizona_runtime_resume,
NULL)
SYSTEM_SLEEP_PM_OPS(arizona_suspend, arizona_resume)
NOIRQ_SYSTEM_SLEEP_PM_OPS(arizona_suspend_noirq,
arizona_resume_noirq)
};
#ifdef CONFIG_OF
static int arizona_of_get_core_pdata(struct arizona *arizona)
{
struct arizona_pdata *pdata = &arizona->pdata;
int ret, i;
/* Handle old non-standard DT binding */
pdata->reset = devm_gpiod_get(arizona->dev, "wlf,reset", GPIOD_OUT_LOW);
if (IS_ERR(pdata->reset)) {
ret = PTR_ERR(pdata->reset);
/*
* Reset missing will be caught when other binding is read
* but all other errors imply this binding is in use but has
* encountered a problem so should be handled.
*/
if (ret == -EPROBE_DEFER)
return ret;
else if (ret != -ENOENT && ret != -ENOSYS)
dev_err(arizona->dev, "Reset GPIO malformed: %d\n",
ret);
pdata->reset = NULL;
}
ret = of_property_read_u32_array(arizona->dev->of_node,
"wlf,gpio-defaults",
pdata->gpio_defaults,
ARRAY_SIZE(pdata->gpio_defaults));
if (ret >= 0) {
/*
* All values are literal except out of range values
* which are chip default, translate into platform
* data which uses 0 as chip default and out of range
* as zero.
*/
for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
if (pdata->gpio_defaults[i] > 0xffff)
pdata->gpio_defaults[i] = 0;
else if (pdata->gpio_defaults[i] == 0)
pdata->gpio_defaults[i] = 0x10000;
}
} else {
dev_err(arizona->dev, "Failed to parse GPIO defaults: %d\n",
ret);
}
return 0;
}
#else
static inline int arizona_of_get_core_pdata(struct arizona *arizona)
{
return 0;
}
#endif
static const struct mfd_cell early_devs[] = {
{ .name = "arizona-ldo1" },
};
static const char * const wm5102_supplies[] = {
"MICVDD",
"DBVDD2",
"DBVDD3",
"CPVDD",
"SPKVDDL",
"SPKVDDR",
};
static const struct mfd_cell wm5102_devs[] = {
{ .name = "arizona-micsupp" },
{ .name = "arizona-gpio" },
{ .name = "arizona-haptics" },
{ .name = "arizona-pwm" },
{
.name = "wm5102-codec",
.parent_supplies = wm5102_supplies,
.num_parent_supplies = ARRAY_SIZE(wm5102_supplies),
},
};
static const struct mfd_cell wm5110_devs[] = {
{ .name = "arizona-micsupp" },
{ .name = "arizona-gpio" },
{ .name = "arizona-haptics" },
{ .name = "arizona-pwm" },
{
.name = "wm5110-codec",
.parent_supplies = wm5102_supplies,
.num_parent_supplies = ARRAY_SIZE(wm5102_supplies),
},
};
static const char * const cs47l24_supplies[] = {
"MICVDD",
"CPVDD",
"SPKVDD",
};
static const struct mfd_cell cs47l24_devs[] = {
{ .name = "arizona-gpio" },
{ .name = "arizona-haptics" },
{ .name = "arizona-pwm" },
{
.name = "cs47l24-codec",
.parent_supplies = cs47l24_supplies,
.num_parent_supplies = ARRAY_SIZE(cs47l24_supplies),
},
};
static const char * const wm8997_supplies[] = {
"MICVDD",
"DBVDD2",
"CPVDD",
"SPKVDD",
};
static const struct mfd_cell wm8997_devs[] = {
{ .name = "arizona-micsupp" },
{ .name = "arizona-gpio" },
{ .name = "arizona-haptics" },
{ .name = "arizona-pwm" },
{
.name = "wm8997-codec",
.parent_supplies = wm8997_supplies,
.num_parent_supplies = ARRAY_SIZE(wm8997_supplies),
},
};
static const struct mfd_cell wm8998_devs[] = {
{ .name = "arizona-micsupp" },
{ .name = "arizona-gpio" },
{ .name = "arizona-haptics" },
{ .name = "arizona-pwm" },
{
.name = "wm8998-codec",
.parent_supplies = wm5102_supplies,
.num_parent_supplies = ARRAY_SIZE(wm5102_supplies),
},
};
int arizona_dev_init(struct arizona *arizona)
{
static const char * const mclk_name[] = { "mclk1", "mclk2" };
struct device *dev = arizona->dev;
const char *type_name = NULL;
unsigned int reg, val;
int (*apply_patch)(struct arizona *) = NULL;
const struct mfd_cell *subdevs = NULL;
int n_subdevs = 0, ret, i;
dev_set_drvdata(arizona->dev, arizona);
mutex_init(&arizona->clk_lock);
if (dev_get_platdata(arizona->dev)) {
memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
sizeof(arizona->pdata));
} else {
ret = arizona_of_get_core_pdata(arizona);
if (ret < 0)
return ret;
}
BUILD_BUG_ON(ARRAY_SIZE(arizona->mclk) != ARRAY_SIZE(mclk_name));
for (i = 0; i < ARRAY_SIZE(arizona->mclk); i++) {
arizona->mclk[i] = devm_clk_get(arizona->dev, mclk_name[i]);
if (IS_ERR(arizona->mclk[i])) {
dev_info(arizona->dev, "Failed to get %s: %ld\n",
mclk_name[i], PTR_ERR(arizona->mclk[i]));
arizona->mclk[i] = NULL;
}
}
regcache_cache_only(arizona->regmap, true);
switch (arizona->type) {
case WM5102:
case WM5110:
case WM8280:
case WM8997:
case WM8998:
case WM1814:
case WM1831:
case CS47L24:
for (i = 0; i < ARRAY_SIZE(wm5102_core_supplies); i++)
arizona->core_supplies[i].supply
= wm5102_core_supplies[i];
arizona->num_core_supplies = ARRAY_SIZE(wm5102_core_supplies);
break;
default:
dev_err(arizona->dev, "Unknown device type %d\n",
arizona->type);
return -ENODEV;
}
/* Mark DCVDD as external, LDO1 driver will clear if internal */
arizona->external_dcvdd = true;
switch (arizona->type) {
case WM1831:
case CS47L24:
break; /* No LDO1 regulator */
default:
ret = mfd_add_devices(arizona->dev, -1, early_devs,
ARRAY_SIZE(early_devs), NULL, 0, NULL);
if (ret != 0) {
dev_err(dev, "Failed to add early children: %d\n", ret);
return ret;
}
break;
}
ret = devm_regulator_bulk_get(dev, arizona->num_core_supplies,
arizona->core_supplies);
if (ret != 0) {
dev_err(dev, "Failed to request core supplies: %d\n",
ret);
goto err_early;
}
/**
* Don't use devres here because the only device we have to get
* against is the MFD device and DCVDD will likely be supplied by
* one of its children. Meaning that the regulator will be
* destroyed by the time devres calls regulator put.
*/
arizona->dcvdd = regulator_get(arizona->dev, "DCVDD");
if (IS_ERR(arizona->dcvdd)) {
ret = PTR_ERR(arizona->dcvdd);
dev_err(dev, "Failed to request DCVDD: %d\n", ret);
goto err_early;
}
if (!arizona->pdata.reset) {
/* Start out with /RESET low to put the chip into reset */
arizona->pdata.reset = devm_gpiod_get(arizona->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(arizona->pdata.reset)) {
ret = PTR_ERR(arizona->pdata.reset);
if (ret == -EPROBE_DEFER)
goto err_dcvdd;
dev_err(arizona->dev,
"Reset GPIO missing/malformed: %d\n", ret);
arizona->pdata.reset = NULL;
}
}
ret = regulator_bulk_enable(arizona->num_core_supplies,
arizona->core_supplies);
if (ret != 0) {
dev_err(dev, "Failed to enable core supplies: %d\n",
ret);
goto err_dcvdd;
}
ret = regulator_enable(arizona->dcvdd);
if (ret != 0) {
dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
goto err_enable;
}
arizona_disable_reset(arizona);
regcache_cache_only(arizona->regmap, false);
/* Verify that this is a chip we know about */
ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
if (ret != 0) {
dev_err(dev, "Failed to read ID register: %d\n", ret);
goto err_reset;
}
switch (reg) {
case 0x5102:
case 0x5110:
case 0x6349:
case 0x6363:
case 0x8997:
break;
default:
dev_err(arizona->dev, "Unknown device ID: %x\n", reg);
ret = -ENODEV;
goto err_reset;
}
/* If we have a /RESET GPIO we'll already be reset */
if (!arizona->pdata.reset) {
ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
if (ret != 0) {
dev_err(dev, "Failed to reset device: %d\n", ret);
goto err_reset;
}
usleep_range(1000, 5000);
}
/* Ensure device startup is complete */
switch (arizona->type) {
case WM5102:
ret = regmap_read(arizona->regmap,
ARIZONA_WRITE_SEQUENCER_CTRL_3, &val);
if (ret) {
dev_err(dev,
"Failed to check write sequencer state: %d\n",
ret);
} else if (val & 0x01) {
ret = wm5102_clear_write_sequencer(arizona);
if (ret)
return ret;
}
break;
default:
break;
}
ret = arizona_wait_for_boot(arizona);
if (ret) {
dev_err(arizona->dev, "Device failed initial boot: %d\n", ret);
goto err_reset;
}
/* Read the device ID information & do device specific stuff */
ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
if (ret != 0) {
dev_err(dev, "Failed to read ID register: %d\n", ret);
goto err_reset;
}
ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
&arizona->rev);
if (ret != 0) {
dev_err(dev, "Failed to read revision register: %d\n", ret);
goto err_reset;
}
arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
switch (reg) {
case 0x5102:
if (IS_ENABLED(CONFIG_MFD_WM5102)) {
type_name = "WM5102";
if (arizona->type != WM5102) {
dev_warn(arizona->dev,
"WM5102 registered as %d\n",
arizona->type);
arizona->type = WM5102;
}
apply_patch = wm5102_patch;
arizona->rev &= 0x7;
subdevs = wm5102_devs;
n_subdevs = ARRAY_SIZE(wm5102_devs);
}
break;
case 0x5110:
if (IS_ENABLED(CONFIG_MFD_WM5110)) {
switch (arizona->type) {
case WM5110:
type_name = "WM5110";
break;
case WM8280:
type_name = "WM8280";
break;
default:
type_name = "WM5110";
dev_warn(arizona->dev,
"WM5110 registered as %d\n",
arizona->type);
arizona->type = WM5110;
break;
}
apply_patch = wm5110_patch;
subdevs = wm5110_devs;
n_subdevs = ARRAY_SIZE(wm5110_devs);
}
break;
case 0x6363:
if (IS_ENABLED(CONFIG_MFD_CS47L24)) {
switch (arizona->type) {
case CS47L24:
type_name = "CS47L24";
break;
case WM1831:
type_name = "WM1831";
break;
default:
dev_warn(arizona->dev,
"CS47L24 registered as %d\n",
arizona->type);
arizona->type = CS47L24;
break;
}
apply_patch = cs47l24_patch;
subdevs = cs47l24_devs;
n_subdevs = ARRAY_SIZE(cs47l24_devs);
}
break;
case 0x8997:
if (IS_ENABLED(CONFIG_MFD_WM8997)) {
type_name = "WM8997";
if (arizona->type != WM8997) {
dev_warn(arizona->dev,
"WM8997 registered as %d\n",
arizona->type);
arizona->type = WM8997;
}
apply_patch = wm8997_patch;
subdevs = wm8997_devs;
n_subdevs = ARRAY_SIZE(wm8997_devs);
}
break;
case 0x6349:
if (IS_ENABLED(CONFIG_MFD_WM8998)) {
switch (arizona->type) {
case WM8998:
type_name = "WM8998";
break;
case WM1814:
type_name = "WM1814";
break;
default:
type_name = "WM8998";
dev_warn(arizona->dev,
"WM8998 registered as %d\n",
arizona->type);
arizona->type = WM8998;
}
apply_patch = wm8998_patch;
subdevs = wm8998_devs;
n_subdevs = ARRAY_SIZE(wm8998_devs);
}
break;
default:
dev_err(arizona->dev, "Unknown device ID %x\n", reg);
ret = -ENODEV;
goto err_reset;
}
if (!subdevs) {
dev_err(arizona->dev,
"No kernel support for device ID %x\n", reg);
ret = -ENODEV;
goto err_reset;
}
dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
if (apply_patch) {
ret = apply_patch(arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to apply patch: %d\n",
ret);
goto err_reset;
}
switch (arizona->type) {
case WM5102:
ret = wm5102_apply_hardware_patch(arizona);
if (ret) {
dev_err(arizona->dev,
"Failed to apply hardware patch: %d\n",
ret);
goto err_reset;
}
break;
case WM5110:
case WM8280:
ret = wm5110_apply_sleep_patch(arizona);
if (ret) {
dev_err(arizona->dev,
"Failed to apply sleep patch: %d\n",
ret);
goto err_reset;
}
break;
default:
break;
}
}
for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
if (!arizona->pdata.gpio_defaults[i])
continue;
regmap_write(arizona->regmap, ARIZONA_GPIO1_CTRL + i,
arizona->pdata.gpio_defaults[i]);
}
/* Chip default */
if (!arizona->pdata.clk32k_src)
arizona->pdata.clk32k_src = ARIZONA_32KZ_MCLK2;
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
case ARIZONA_32KZ_MCLK2:
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_SRC_MASK,
arizona->pdata.clk32k_src - 1);
arizona_clk32k_enable(arizona);
break;
case ARIZONA_32KZ_NONE:
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_SRC_MASK, 2);
break;
default:
dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
arizona->pdata.clk32k_src);
ret = -EINVAL;
goto err_reset;
}
for (i = 0; i < ARIZONA_MAX_MICBIAS; i++) {
if (!arizona->pdata.micbias[i].mV &&
!arizona->pdata.micbias[i].bypass)
continue;
/* Apply default for bypass mode */
if (!arizona->pdata.micbias[i].mV)
arizona->pdata.micbias[i].mV = 2800;
val = (arizona->pdata.micbias[i].mV - 1500) / 100;
val <<= ARIZONA_MICB1_LVL_SHIFT;
if (arizona->pdata.micbias[i].ext_cap)
val |= ARIZONA_MICB1_EXT_CAP;
if (arizona->pdata.micbias[i].discharge)
val |= ARIZONA_MICB1_DISCH;
if (arizona->pdata.micbias[i].soft_start)
val |= ARIZONA_MICB1_RATE;
if (arizona->pdata.micbias[i].bypass)
val |= ARIZONA_MICB1_BYPASS;
regmap_update_bits(arizona->regmap,
ARIZONA_MIC_BIAS_CTRL_1 + i,
ARIZONA_MICB1_LVL_MASK |
ARIZONA_MICB1_EXT_CAP |
ARIZONA_MICB1_DISCH |
ARIZONA_MICB1_BYPASS |
ARIZONA_MICB1_RATE, val);
}
pm_runtime_set_active(arizona->dev);
pm_runtime_enable(arizona->dev);
/* Set up for interrupts */
ret = arizona_irq_init(arizona);
if (ret != 0)
goto err_pm;
pm_runtime_set_autosuspend_delay(arizona->dev, 100);
pm_runtime_use_autosuspend(arizona->dev);
arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
arizona_clkgen_err, arizona);
arizona_request_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, "Overclocked",
arizona_overclocked, arizona);
arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
arizona_underclocked, arizona);
ret = mfd_add_devices(arizona->dev, PLATFORM_DEVID_NONE,
subdevs, n_subdevs, NULL, 0, NULL);
if (ret) {
dev_err(arizona->dev, "Failed to add subdevices: %d\n", ret);
goto err_irq;
}
return 0;
err_irq:
arizona_irq_exit(arizona);
err_pm:
pm_runtime_disable(arizona->dev);
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
case ARIZONA_32KZ_MCLK2:
arizona_clk32k_disable(arizona);
break;
default:
break;
}
err_reset:
arizona_enable_reset(arizona);
regulator_disable(arizona->dcvdd);
err_enable:
regulator_bulk_disable(arizona->num_core_supplies,
arizona->core_supplies);
err_dcvdd:
regulator_put(arizona->dcvdd);
err_early:
mfd_remove_devices(dev);
return ret;
}
EXPORT_SYMBOL_GPL(arizona_dev_init);
int arizona_dev_exit(struct arizona *arizona)
{
disable_irq(arizona->irq);
pm_runtime_disable(arizona->dev);
regulator_disable(arizona->dcvdd);
regulator_put(arizona->dcvdd);
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
case ARIZONA_32KZ_MCLK2:
arizona_clk32k_disable(arizona);
break;
default:
break;
}
mfd_remove_devices(arizona->dev);
arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);
arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
arizona_irq_exit(arizona);
arizona_enable_reset(arizona);
regulator_bulk_disable(arizona->num_core_supplies,
arizona->core_supplies);
return 0;
}
EXPORT_SYMBOL_GPL(arizona_dev_exit);
MODULE_DESCRIPTION("Wolfson Arizona core driver");
MODULE_LICENSE("GPL v2");
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