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linux/drivers/mfd/wm8350-irq.c
Mark Brown 5a65edbc12 mfd: Convert wm8350 IRQ handlers to irq_handler_t 
This is done as simple code transformation, the semantics of the
IRQ API provided by the core are are still very different to those
of genirq (mainly with regard to masking).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-12-13 19:21:39 +01:00

526 lines
13 KiB
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/*
* wm8350-irq.c -- IRQ support for Wolfson WM8350
*
* Copyright 2007, 2008, 2009 Wolfson Microelectronics PLC.
*
* Author: Liam Girdwood, Mark Brown
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bug.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/audio.h>
#include <linux/mfd/wm8350/comparator.h>
#include <linux/mfd/wm8350/gpio.h>
#include <linux/mfd/wm8350/pmic.h>
#include <linux/mfd/wm8350/rtc.h>
#include <linux/mfd/wm8350/supply.h>
#include <linux/mfd/wm8350/wdt.h>
#define WM8350_NUM_IRQ_REGS 7
#define WM8350_INT_OFFSET_1 0
#define WM8350_INT_OFFSET_2 1
#define WM8350_POWER_UP_INT_OFFSET 2
#define WM8350_UNDER_VOLTAGE_INT_OFFSET 3
#define WM8350_OVER_CURRENT_INT_OFFSET 4
#define WM8350_GPIO_INT_OFFSET 5
#define WM8350_COMPARATOR_INT_OFFSET 6
struct wm8350_irq_data {
int primary;
int reg;
int mask;
int primary_only;
};
static struct wm8350_irq_data wm8350_irqs[] = {
[WM8350_IRQ_OC_LS] = {
.primary = WM8350_OC_INT,
.reg = WM8350_OVER_CURRENT_INT_OFFSET,
.mask = WM8350_OC_LS_EINT,
.primary_only = 1,
},
[WM8350_IRQ_UV_DC1] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC1_EINT,
},
[WM8350_IRQ_UV_DC2] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC2_EINT,
},
[WM8350_IRQ_UV_DC3] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC3_EINT,
},
[WM8350_IRQ_UV_DC4] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC4_EINT,
},
[WM8350_IRQ_UV_DC5] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC5_EINT,
},
[WM8350_IRQ_UV_DC6] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_DC6_EINT,
},
[WM8350_IRQ_UV_LDO1] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_LDO1_EINT,
},
[WM8350_IRQ_UV_LDO2] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_LDO2_EINT,
},
[WM8350_IRQ_UV_LDO3] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_LDO3_EINT,
},
[WM8350_IRQ_UV_LDO4] = {
.primary = WM8350_UV_INT,
.reg = WM8350_UNDER_VOLTAGE_INT_OFFSET,
.mask = WM8350_UV_LDO4_EINT,
},
[WM8350_IRQ_CHG_BAT_HOT] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_BAT_HOT_EINT,
},
[WM8350_IRQ_CHG_BAT_COLD] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_BAT_COLD_EINT,
},
[WM8350_IRQ_CHG_BAT_FAIL] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_BAT_FAIL_EINT,
},
[WM8350_IRQ_CHG_TO] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_TO_EINT,
},
[WM8350_IRQ_CHG_END] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_END_EINT,
},
[WM8350_IRQ_CHG_START] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_START_EINT,
},
[WM8350_IRQ_CHG_FAST_RDY] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_FAST_RDY_EINT,
},
[WM8350_IRQ_CHG_VBATT_LT_3P9] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_VBATT_LT_3P9_EINT,
},
[WM8350_IRQ_CHG_VBATT_LT_3P1] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_VBATT_LT_3P1_EINT,
},
[WM8350_IRQ_CHG_VBATT_LT_2P85] = {
.primary = WM8350_CHG_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_CHG_VBATT_LT_2P85_EINT,
},
[WM8350_IRQ_RTC_ALM] = {
.primary = WM8350_RTC_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_RTC_ALM_EINT,
},
[WM8350_IRQ_RTC_SEC] = {
.primary = WM8350_RTC_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_RTC_SEC_EINT,
},
[WM8350_IRQ_RTC_PER] = {
.primary = WM8350_RTC_INT,
.reg = WM8350_INT_OFFSET_1,
.mask = WM8350_RTC_PER_EINT,
},
[WM8350_IRQ_CS1] = {
.primary = WM8350_CS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_CS1_EINT,
},
[WM8350_IRQ_CS2] = {
.primary = WM8350_CS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_CS2_EINT,
},
[WM8350_IRQ_SYS_HYST_COMP_FAIL] = {
.primary = WM8350_SYS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_SYS_HYST_COMP_FAIL_EINT,
},
[WM8350_IRQ_SYS_CHIP_GT115] = {
.primary = WM8350_SYS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_SYS_CHIP_GT115_EINT,
},
[WM8350_IRQ_SYS_CHIP_GT140] = {
.primary = WM8350_SYS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_SYS_CHIP_GT140_EINT,
},
[WM8350_IRQ_SYS_WDOG_TO] = {
.primary = WM8350_SYS_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_SYS_WDOG_TO_EINT,
},
[WM8350_IRQ_AUXADC_DATARDY] = {
.primary = WM8350_AUXADC_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_AUXADC_DATARDY_EINT,
},
[WM8350_IRQ_AUXADC_DCOMP4] = {
.primary = WM8350_AUXADC_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_AUXADC_DCOMP4_EINT,
},
[WM8350_IRQ_AUXADC_DCOMP3] = {
.primary = WM8350_AUXADC_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_AUXADC_DCOMP3_EINT,
},
[WM8350_IRQ_AUXADC_DCOMP2] = {
.primary = WM8350_AUXADC_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_AUXADC_DCOMP2_EINT,
},
[WM8350_IRQ_AUXADC_DCOMP1] = {
.primary = WM8350_AUXADC_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_AUXADC_DCOMP1_EINT,
},
[WM8350_IRQ_USB_LIMIT] = {
.primary = WM8350_USB_INT,
.reg = WM8350_INT_OFFSET_2,
.mask = WM8350_USB_LIMIT_EINT,
.primary_only = 1,
},
[WM8350_IRQ_WKUP_OFF_STATE] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_OFF_STATE_EINT,
},
[WM8350_IRQ_WKUP_HIB_STATE] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_HIB_STATE_EINT,
},
[WM8350_IRQ_WKUP_CONV_FAULT] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_CONV_FAULT_EINT,
},
[WM8350_IRQ_WKUP_WDOG_RST] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_WDOG_RST_EINT,
},
[WM8350_IRQ_WKUP_GP_PWR_ON] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_GP_PWR_ON_EINT,
},
[WM8350_IRQ_WKUP_ONKEY] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_ONKEY_EINT,
},
[WM8350_IRQ_WKUP_GP_WAKEUP] = {
.primary = WM8350_WKUP_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_WKUP_GP_WAKEUP_EINT,
},
[WM8350_IRQ_CODEC_JCK_DET_L] = {
.primary = WM8350_CODEC_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_CODEC_JCK_DET_L_EINT,
},
[WM8350_IRQ_CODEC_JCK_DET_R] = {
.primary = WM8350_CODEC_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_CODEC_JCK_DET_R_EINT,
},
[WM8350_IRQ_CODEC_MICSCD] = {
.primary = WM8350_CODEC_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_CODEC_MICSCD_EINT,
},
[WM8350_IRQ_CODEC_MICD] = {
.primary = WM8350_CODEC_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_CODEC_MICD_EINT,
},
[WM8350_IRQ_EXT_USB_FB] = {
.primary = WM8350_EXT_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_EXT_USB_FB_EINT,
},
[WM8350_IRQ_EXT_WALL_FB] = {
.primary = WM8350_EXT_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_EXT_WALL_FB_EINT,
},
[WM8350_IRQ_EXT_BAT_FB] = {
.primary = WM8350_EXT_INT,
.reg = WM8350_COMPARATOR_INT_OFFSET,
.mask = WM8350_EXT_BAT_FB_EINT,
},
[WM8350_IRQ_GPIO(0)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP0_EINT,
},
[WM8350_IRQ_GPIO(1)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP1_EINT,
},
[WM8350_IRQ_GPIO(2)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP2_EINT,
},
[WM8350_IRQ_GPIO(3)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP3_EINT,
},
[WM8350_IRQ_GPIO(4)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP4_EINT,
},
[WM8350_IRQ_GPIO(5)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP5_EINT,
},
[WM8350_IRQ_GPIO(6)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP6_EINT,
},
[WM8350_IRQ_GPIO(7)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP7_EINT,
},
[WM8350_IRQ_GPIO(8)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP8_EINT,
},
[WM8350_IRQ_GPIO(9)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP9_EINT,
},
[WM8350_IRQ_GPIO(10)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP10_EINT,
},
[WM8350_IRQ_GPIO(11)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP11_EINT,
},
[WM8350_IRQ_GPIO(12)] = {
.primary = WM8350_GP_INT,
.reg = WM8350_GPIO_INT_OFFSET,
.mask = WM8350_GP12_EINT,
},
};
static void wm8350_irq_call_handler(struct wm8350 *wm8350, int irq)
{
mutex_lock(&wm8350->irq_mutex);
if (wm8350->irq[irq].handler)
wm8350->irq[irq].handler(irq, wm8350->irq[irq].data);
else {
dev_err(wm8350->dev, "irq %d nobody cared. now masked.\n",
irq);
wm8350_mask_irq(wm8350, irq);
}
mutex_unlock(&wm8350->irq_mutex);
}
/*
* This is a threaded IRQ handler so can access I2C/SPI. Since all
* interrupts are clear on read the IRQ line will be reasserted and
* the physical IRQ will be handled again if another interrupt is
* asserted while we run - in the normal course of events this is a
* rare occurrence so we save I2C/SPI reads.
*/
static irqreturn_t wm8350_irq(int irq, void *irq_data)
{
struct wm8350 *wm8350 = irq_data;
u16 level_one;
u16 sub_reg[WM8350_NUM_IRQ_REGS];
int read_done[WM8350_NUM_IRQ_REGS];
struct wm8350_irq_data *data;
int i;
/* TODO: Use block reads to improve performance? */
level_one = wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS)
& ~wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK);
if (!level_one)
return IRQ_NONE;
memset(&read_done, 0, sizeof(read_done));
for (i = 0; i < ARRAY_SIZE(wm8350_irqs); i++) {
data = &wm8350_irqs[i];
if (!(level_one & data->primary))
continue;
if (!read_done[data->reg]) {
sub_reg[data->reg] =
wm8350_reg_read(wm8350, WM8350_INT_STATUS_1 +
data->reg);
sub_reg[data->reg] &=
~wm8350_reg_read(wm8350,
WM8350_INT_STATUS_1_MASK +
data->reg);
read_done[data->reg] = 1;
}
if (sub_reg[data->reg] & data->mask)
wm8350_irq_call_handler(wm8350, i);
}
return IRQ_HANDLED;
}
int wm8350_register_irq(struct wm8350 *wm8350, int irq,
irq_handler_t handler, unsigned long flags,
const char *name, void *data)
{
if (irq < 0 || irq > WM8350_NUM_IRQ || !handler)
return -EINVAL;
if (wm8350->irq[irq].handler)
return -EBUSY;
mutex_lock(&wm8350->irq_mutex);
wm8350->irq[irq].handler = handler;
wm8350->irq[irq].data = data;
mutex_unlock(&wm8350->irq_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_register_irq);
int wm8350_free_irq(struct wm8350 *wm8350, int irq)
{
if (irq < 0 || irq > WM8350_NUM_IRQ)
return -EINVAL;
mutex_lock(&wm8350->irq_mutex);
wm8350->irq[irq].handler = NULL;
mutex_unlock(&wm8350->irq_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_free_irq);
int wm8350_mask_irq(struct wm8350 *wm8350, int irq)
{
return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK +
wm8350_irqs[irq].reg,
wm8350_irqs[irq].mask);
}
EXPORT_SYMBOL_GPL(wm8350_mask_irq);
int wm8350_unmask_irq(struct wm8350 *wm8350, int irq)
{
return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK +
wm8350_irqs[irq].reg,
wm8350_irqs[irq].mask);
}
EXPORT_SYMBOL_GPL(wm8350_unmask_irq);
int wm8350_irq_init(struct wm8350 *wm8350, int irq,
struct wm8350_platform_data *pdata)
{
int ret;
int flags = IRQF_ONESHOT;
if (!irq) {
dev_err(wm8350->dev, "No IRQ configured\n");
return -EINVAL;
}
wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0xFFFF);
wm8350_reg_write(wm8350, WM8350_INT_STATUS_1_MASK, 0xFFFF);
wm8350_reg_write(wm8350, WM8350_INT_STATUS_2_MASK, 0xFFFF);
wm8350_reg_write(wm8350, WM8350_UNDER_VOLTAGE_INT_STATUS_MASK, 0xFFFF);
wm8350_reg_write(wm8350, WM8350_GPIO_INT_STATUS_MASK, 0xFFFF);
wm8350_reg_write(wm8350, WM8350_COMPARATOR_INT_STATUS_MASK, 0xFFFF);
mutex_init(&wm8350->irq_mutex);
wm8350->chip_irq = irq;
if (pdata && pdata->irq_high) {
flags |= IRQF_TRIGGER_HIGH;
wm8350_set_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
WM8350_IRQ_POL);
} else {
flags |= IRQF_TRIGGER_LOW;
wm8350_clear_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
WM8350_IRQ_POL);
}
ret = request_threaded_irq(irq, NULL, wm8350_irq, flags,
"wm8350", wm8350);
if (ret != 0)
dev_err(wm8350->dev, "Failed to request IRQ: %d\n", ret);
return ret;
}
int wm8350_irq_exit(struct wm8350 *wm8350)
{
free_irq(wm8350->chip_irq, wm8350);
return 0;
}
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