424 строки
9.9 KiB
C
424 строки
9.9 KiB
C
/*
|
|
* Arizona interrupt support
|
|
*
|
|
* Copyright 2012 Wolfson Microelectronics plc
|
|
*
|
|
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mfd/arizona/core.h>
|
|
#include <linux/mfd/arizona/registers.h>
|
|
|
|
#include "arizona.h"
|
|
|
|
static int arizona_map_irq(struct arizona *arizona, int irq)
|
|
{
|
|
int ret;
|
|
|
|
if (arizona->aod_irq_chip) {
|
|
ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
|
|
if (ret >= 0)
|
|
return ret;
|
|
}
|
|
|
|
return regmap_irq_get_virq(arizona->irq_chip, irq);
|
|
}
|
|
|
|
int arizona_request_irq(struct arizona *arizona, int irq, char *name,
|
|
irq_handler_t handler, void *data)
|
|
{
|
|
irq = arizona_map_irq(arizona, irq);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
|
|
name, data);
|
|
}
|
|
EXPORT_SYMBOL_GPL(arizona_request_irq);
|
|
|
|
void arizona_free_irq(struct arizona *arizona, int irq, void *data)
|
|
{
|
|
irq = arizona_map_irq(arizona, irq);
|
|
if (irq < 0)
|
|
return;
|
|
|
|
free_irq(irq, data);
|
|
}
|
|
EXPORT_SYMBOL_GPL(arizona_free_irq);
|
|
|
|
int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
|
|
{
|
|
irq = arizona_map_irq(arizona, irq);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
return irq_set_irq_wake(irq, on);
|
|
}
|
|
EXPORT_SYMBOL_GPL(arizona_set_irq_wake);
|
|
|
|
static irqreturn_t arizona_boot_done(int irq, void *data)
|
|
{
|
|
struct arizona *arizona = data;
|
|
|
|
dev_dbg(arizona->dev, "Boot done\n");
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t arizona_ctrlif_err(int irq, void *data)
|
|
{
|
|
struct arizona *arizona = data;
|
|
|
|
/*
|
|
* For pretty much all potential sources a register cache sync
|
|
* won't help, we've just got a software bug somewhere.
|
|
*/
|
|
dev_err(arizona->dev, "Control interface error\n");
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t arizona_irq_thread(int irq, void *data)
|
|
{
|
|
struct arizona *arizona = data;
|
|
bool poll;
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = pm_runtime_get_sync(arizona->dev);
|
|
if (ret < 0) {
|
|
dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
do {
|
|
poll = false;
|
|
|
|
if (arizona->aod_irq_chip) {
|
|
/*
|
|
* Check the AOD status register to determine whether
|
|
* the nested IRQ handler should be called.
|
|
*/
|
|
ret = regmap_read(arizona->regmap,
|
|
ARIZONA_AOD_IRQ1, &val);
|
|
if (ret)
|
|
dev_warn(arizona->dev,
|
|
"Failed to read AOD IRQ1 %d\n", ret);
|
|
else if (val)
|
|
handle_nested_irq(
|
|
irq_find_mapping(arizona->virq, 0));
|
|
}
|
|
|
|
/*
|
|
* Check if one of the main interrupts is asserted and only
|
|
* check that domain if it is.
|
|
*/
|
|
ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,
|
|
&val);
|
|
if (ret == 0 && val & ARIZONA_IRQ1_STS) {
|
|
handle_nested_irq(irq_find_mapping(arizona->virq, 1));
|
|
} else if (ret != 0) {
|
|
dev_err(arizona->dev,
|
|
"Failed to read main IRQ status: %d\n", ret);
|
|
}
|
|
|
|
/*
|
|
* Poll the IRQ pin status to see if we're really done
|
|
* if the interrupt controller can't do it for us.
|
|
*/
|
|
if (!arizona->pdata.irq_gpio) {
|
|
break;
|
|
} else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&
|
|
gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
|
|
poll = true;
|
|
} else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&
|
|
!gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
|
|
poll = true;
|
|
}
|
|
} while (poll);
|
|
|
|
pm_runtime_mark_last_busy(arizona->dev);
|
|
pm_runtime_put_autosuspend(arizona->dev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void arizona_irq_enable(struct irq_data *data)
|
|
{
|
|
}
|
|
|
|
static void arizona_irq_disable(struct irq_data *data)
|
|
{
|
|
}
|
|
|
|
static int arizona_irq_set_wake(struct irq_data *data, unsigned int on)
|
|
{
|
|
struct arizona *arizona = irq_data_get_irq_chip_data(data);
|
|
|
|
return irq_set_irq_wake(arizona->irq, on);
|
|
}
|
|
|
|
static struct irq_chip arizona_irq_chip = {
|
|
.name = "arizona",
|
|
.irq_disable = arizona_irq_disable,
|
|
.irq_enable = arizona_irq_enable,
|
|
.irq_set_wake = arizona_irq_set_wake,
|
|
};
|
|
|
|
static struct lock_class_key arizona_irq_lock_class;
|
|
|
|
static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
|
|
irq_hw_number_t hw)
|
|
{
|
|
struct arizona *data = h->host_data;
|
|
|
|
irq_set_chip_data(virq, data);
|
|
irq_set_lockdep_class(virq, &arizona_irq_lock_class);
|
|
irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq);
|
|
irq_set_nested_thread(virq, 1);
|
|
irq_set_noprobe(virq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct irq_domain_ops arizona_domain_ops = {
|
|
.map = arizona_irq_map,
|
|
.xlate = irq_domain_xlate_twocell,
|
|
};
|
|
|
|
int arizona_irq_init(struct arizona *arizona)
|
|
{
|
|
int flags = IRQF_ONESHOT;
|
|
int ret, i;
|
|
const struct regmap_irq_chip *aod, *irq;
|
|
struct irq_data *irq_data;
|
|
|
|
arizona->ctrlif_error = true;
|
|
|
|
switch (arizona->type) {
|
|
#ifdef CONFIG_MFD_WM5102
|
|
case WM5102:
|
|
aod = &wm5102_aod;
|
|
irq = &wm5102_irq;
|
|
|
|
arizona->ctrlif_error = false;
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MFD_WM5110
|
|
case WM5110:
|
|
case WM8280:
|
|
aod = &wm5110_aod;
|
|
|
|
switch (arizona->rev) {
|
|
case 0 ... 2:
|
|
irq = &wm5110_irq;
|
|
break;
|
|
default:
|
|
irq = &wm5110_revd_irq;
|
|
break;
|
|
}
|
|
|
|
arizona->ctrlif_error = false;
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MFD_CS47L24
|
|
case WM1831:
|
|
case CS47L24:
|
|
aod = NULL;
|
|
irq = &cs47l24_irq;
|
|
|
|
arizona->ctrlif_error = false;
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MFD_WM8997
|
|
case WM8997:
|
|
aod = &wm8997_aod;
|
|
irq = &wm8997_irq;
|
|
|
|
arizona->ctrlif_error = false;
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_MFD_WM8998
|
|
case WM8998:
|
|
case WM1814:
|
|
aod = &wm8998_aod;
|
|
irq = &wm8998_irq;
|
|
|
|
arizona->ctrlif_error = false;
|
|
break;
|
|
#endif
|
|
default:
|
|
BUG_ON("Unknown Arizona class device" == NULL);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Disable all wake sources by default */
|
|
regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0);
|
|
|
|
/* Read the flags from the interrupt controller if not specified */
|
|
if (!arizona->pdata.irq_flags) {
|
|
irq_data = irq_get_irq_data(arizona->irq);
|
|
if (!irq_data) {
|
|
dev_err(arizona->dev, "Invalid IRQ: %d\n",
|
|
arizona->irq);
|
|
return -EINVAL;
|
|
}
|
|
|
|
arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data);
|
|
switch (arizona->pdata.irq_flags) {
|
|
case IRQF_TRIGGER_LOW:
|
|
case IRQF_TRIGGER_HIGH:
|
|
case IRQF_TRIGGER_RISING:
|
|
case IRQF_TRIGGER_FALLING:
|
|
break;
|
|
|
|
case IRQ_TYPE_NONE:
|
|
default:
|
|
/* Device default */
|
|
arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH |
|
|
IRQF_TRIGGER_RISING)) {
|
|
ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
|
|
ARIZONA_IRQ_POL, 0);
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
|
|
ret);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
flags |= arizona->pdata.irq_flags;
|
|
|
|
/* Allocate a virtual IRQ domain to distribute to the regmap domains */
|
|
arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
|
|
arizona);
|
|
if (!arizona->virq) {
|
|
dev_err(arizona->dev, "Failed to add core IRQ domain\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
if (aod) {
|
|
ret = regmap_add_irq_chip(arizona->regmap,
|
|
irq_create_mapping(arizona->virq, 0),
|
|
IRQF_ONESHOT, 0, aod,
|
|
&arizona->aod_irq_chip);
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev,
|
|
"Failed to add AOD IRQs: %d\n", ret);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ret = regmap_add_irq_chip(arizona->regmap,
|
|
irq_create_mapping(arizona->virq, 1),
|
|
IRQF_ONESHOT, 0, irq,
|
|
&arizona->irq_chip);
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret);
|
|
goto err_aod;
|
|
}
|
|
|
|
/* Used to emulate edge trigger and to work around broken pinmux */
|
|
if (arizona->pdata.irq_gpio) {
|
|
if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {
|
|
dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",
|
|
arizona->irq, arizona->pdata.irq_gpio,
|
|
gpio_to_irq(arizona->pdata.irq_gpio));
|
|
arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);
|
|
}
|
|
|
|
ret = devm_gpio_request_one(arizona->dev,
|
|
arizona->pdata.irq_gpio,
|
|
GPIOF_IN, "arizona IRQ");
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev,
|
|
"Failed to request IRQ GPIO %d:: %d\n",
|
|
arizona->pdata.irq_gpio, ret);
|
|
arizona->pdata.irq_gpio = 0;
|
|
}
|
|
}
|
|
|
|
ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
|
|
flags, "arizona", arizona);
|
|
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n",
|
|
arizona->irq, ret);
|
|
goto err_main_irq;
|
|
}
|
|
|
|
/* Make sure the boot done IRQ is unmasked for resumes */
|
|
i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
|
|
ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
|
|
"Boot done", arizona);
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
|
|
arizona->irq, ret);
|
|
goto err_boot_done;
|
|
}
|
|
|
|
/* Handle control interface errors in the core */
|
|
if (arizona->ctrlif_error) {
|
|
i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
|
|
ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
|
|
IRQF_ONESHOT,
|
|
"Control interface error", arizona);
|
|
if (ret != 0) {
|
|
dev_err(arizona->dev,
|
|
"Failed to request CTRLIF_ERR %d: %d\n",
|
|
arizona->irq, ret);
|
|
goto err_ctrlif;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_ctrlif:
|
|
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
|
|
err_boot_done:
|
|
free_irq(arizona->irq, arizona);
|
|
err_main_irq:
|
|
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
|
|
arizona->irq_chip);
|
|
err_aod:
|
|
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
|
|
arizona->aod_irq_chip);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
int arizona_irq_exit(struct arizona *arizona)
|
|
{
|
|
if (arizona->ctrlif_error)
|
|
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR),
|
|
arizona);
|
|
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
|
|
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
|
|
arizona->irq_chip);
|
|
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
|
|
arizona->aod_irq_chip);
|
|
free_irq(arizona->irq, arizona);
|
|
|
|
return 0;
|
|
}
|