![Thomas Gleixner](/assets/img/avatar_default.png)
Converted with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
315 lines
7.1 KiB
C
315 lines
7.1 KiB
C
/*
|
|
* wm8994-irq.c -- Interrupt controller support for Wolfson WM8994
|
|
*
|
|
* Copyright 2010 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 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/i2c.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/mfd/wm8994/core.h>
|
|
#include <linux/mfd/wm8994/registers.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
struct wm8994_irq_data {
|
|
int reg;
|
|
int mask;
|
|
};
|
|
|
|
static struct wm8994_irq_data wm8994_irqs[] = {
|
|
[WM8994_IRQ_TEMP_SHUT] = {
|
|
.reg = 2,
|
|
.mask = WM8994_TEMP_SHUT_EINT,
|
|
},
|
|
[WM8994_IRQ_MIC1_DET] = {
|
|
.reg = 2,
|
|
.mask = WM8994_MIC1_DET_EINT,
|
|
},
|
|
[WM8994_IRQ_MIC1_SHRT] = {
|
|
.reg = 2,
|
|
.mask = WM8994_MIC1_SHRT_EINT,
|
|
},
|
|
[WM8994_IRQ_MIC2_DET] = {
|
|
.reg = 2,
|
|
.mask = WM8994_MIC2_DET_EINT,
|
|
},
|
|
[WM8994_IRQ_MIC2_SHRT] = {
|
|
.reg = 2,
|
|
.mask = WM8994_MIC2_SHRT_EINT,
|
|
},
|
|
[WM8994_IRQ_FLL1_LOCK] = {
|
|
.reg = 2,
|
|
.mask = WM8994_FLL1_LOCK_EINT,
|
|
},
|
|
[WM8994_IRQ_FLL2_LOCK] = {
|
|
.reg = 2,
|
|
.mask = WM8994_FLL2_LOCK_EINT,
|
|
},
|
|
[WM8994_IRQ_SRC1_LOCK] = {
|
|
.reg = 2,
|
|
.mask = WM8994_SRC1_LOCK_EINT,
|
|
},
|
|
[WM8994_IRQ_SRC2_LOCK] = {
|
|
.reg = 2,
|
|
.mask = WM8994_SRC2_LOCK_EINT,
|
|
},
|
|
[WM8994_IRQ_AIF1DRC1_SIG_DET] = {
|
|
.reg = 2,
|
|
.mask = WM8994_AIF1DRC1_SIG_DET,
|
|
},
|
|
[WM8994_IRQ_AIF1DRC2_SIG_DET] = {
|
|
.reg = 2,
|
|
.mask = WM8994_AIF1DRC2_SIG_DET_EINT,
|
|
},
|
|
[WM8994_IRQ_AIF2DRC_SIG_DET] = {
|
|
.reg = 2,
|
|
.mask = WM8994_AIF2DRC_SIG_DET_EINT,
|
|
},
|
|
[WM8994_IRQ_FIFOS_ERR] = {
|
|
.reg = 2,
|
|
.mask = WM8994_FIFOS_ERR_EINT,
|
|
},
|
|
[WM8994_IRQ_WSEQ_DONE] = {
|
|
.reg = 2,
|
|
.mask = WM8994_WSEQ_DONE_EINT,
|
|
},
|
|
[WM8994_IRQ_DCS_DONE] = {
|
|
.reg = 2,
|
|
.mask = WM8994_DCS_DONE_EINT,
|
|
},
|
|
[WM8994_IRQ_TEMP_WARN] = {
|
|
.reg = 2,
|
|
.mask = WM8994_TEMP_WARN_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(1)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP1_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(2)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP2_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(3)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP3_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(4)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP4_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(5)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP5_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(6)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP6_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(7)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP7_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(8)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP8_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(9)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP8_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(10)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP10_EINT,
|
|
},
|
|
[WM8994_IRQ_GPIO(11)] = {
|
|
.reg = 1,
|
|
.mask = WM8994_GP11_EINT,
|
|
},
|
|
};
|
|
|
|
static inline int irq_data_to_status_reg(struct wm8994_irq_data *irq_data)
|
|
{
|
|
return WM8994_INTERRUPT_STATUS_1 - 1 + irq_data->reg;
|
|
}
|
|
|
|
static inline int irq_data_to_mask_reg(struct wm8994_irq_data *irq_data)
|
|
{
|
|
return WM8994_INTERRUPT_STATUS_1_MASK - 1 + irq_data->reg;
|
|
}
|
|
|
|
static inline struct wm8994_irq_data *irq_to_wm8994_irq(struct wm8994 *wm8994,
|
|
int irq)
|
|
{
|
|
return &wm8994_irqs[irq - wm8994->irq_base];
|
|
}
|
|
|
|
static void wm8994_irq_lock(struct irq_data *data)
|
|
{
|
|
struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
|
|
|
|
mutex_lock(&wm8994->irq_lock);
|
|
}
|
|
|
|
static void wm8994_irq_sync_unlock(struct irq_data *data)
|
|
{
|
|
struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
|
|
/* If there's been a change in the mask write it back
|
|
* to the hardware. */
|
|
if (wm8994->irq_masks_cur[i] != wm8994->irq_masks_cache[i]) {
|
|
wm8994->irq_masks_cache[i] = wm8994->irq_masks_cur[i];
|
|
wm8994_reg_write(wm8994,
|
|
WM8994_INTERRUPT_STATUS_1_MASK + i,
|
|
wm8994->irq_masks_cur[i]);
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&wm8994->irq_lock);
|
|
}
|
|
|
|
static void wm8994_irq_enable(struct irq_data *data)
|
|
{
|
|
struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
|
|
struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994,
|
|
data->irq);
|
|
|
|
wm8994->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
|
|
}
|
|
|
|
static void wm8994_irq_disable(struct irq_data *data)
|
|
{
|
|
struct wm8994 *wm8994 = irq_data_get_irq_chip_data(data);
|
|
struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994,
|
|
data->irq);
|
|
|
|
wm8994->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
|
|
}
|
|
|
|
static struct irq_chip wm8994_irq_chip = {
|
|
.name = "wm8994",
|
|
.irq_bus_lock = wm8994_irq_lock,
|
|
.irq_bus_sync_unlock = wm8994_irq_sync_unlock,
|
|
.irq_disable = wm8994_irq_disable,
|
|
.irq_enable = wm8994_irq_enable,
|
|
};
|
|
|
|
/* The processing of the primary interrupt occurs in a thread so that
|
|
* we can interact with the device over I2C or SPI. */
|
|
static irqreturn_t wm8994_irq_thread(int irq, void *data)
|
|
{
|
|
struct wm8994 *wm8994 = data;
|
|
unsigned int i;
|
|
u16 status[WM8994_NUM_IRQ_REGS];
|
|
int ret;
|
|
|
|
ret = wm8994_bulk_read(wm8994, WM8994_INTERRUPT_STATUS_1,
|
|
WM8994_NUM_IRQ_REGS, status);
|
|
if (ret < 0) {
|
|
dev_err(wm8994->dev, "Failed to read interrupt status: %d\n",
|
|
ret);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/* Bit swap and apply masking */
|
|
for (i = 0; i < WM8994_NUM_IRQ_REGS; i++) {
|
|
status[i] = be16_to_cpu(status[i]);
|
|
status[i] &= ~wm8994->irq_masks_cur[i];
|
|
}
|
|
|
|
/* Report */
|
|
for (i = 0; i < ARRAY_SIZE(wm8994_irqs); i++) {
|
|
if (status[wm8994_irqs[i].reg - 1] & wm8994_irqs[i].mask)
|
|
handle_nested_irq(wm8994->irq_base + i);
|
|
}
|
|
|
|
/* Ack any unmasked IRQs */
|
|
for (i = 0; i < ARRAY_SIZE(status); i++) {
|
|
if (status[i])
|
|
wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1 + i,
|
|
status[i]);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
int wm8994_irq_init(struct wm8994 *wm8994)
|
|
{
|
|
int i, cur_irq, ret;
|
|
|
|
mutex_init(&wm8994->irq_lock);
|
|
|
|
/* Mask the individual interrupt sources */
|
|
for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
|
|
wm8994->irq_masks_cur[i] = 0xffff;
|
|
wm8994->irq_masks_cache[i] = 0xffff;
|
|
wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK + i,
|
|
0xffff);
|
|
}
|
|
|
|
if (!wm8994->irq) {
|
|
dev_warn(wm8994->dev,
|
|
"No interrupt specified, no interrupts\n");
|
|
wm8994->irq_base = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (!wm8994->irq_base) {
|
|
dev_err(wm8994->dev,
|
|
"No interrupt base specified, no interrupts\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Register them with genirq */
|
|
for (cur_irq = wm8994->irq_base;
|
|
cur_irq < ARRAY_SIZE(wm8994_irqs) + wm8994->irq_base;
|
|
cur_irq++) {
|
|
irq_set_chip_data(cur_irq, wm8994);
|
|
irq_set_chip_and_handler(cur_irq, &wm8994_irq_chip,
|
|
handle_edge_irq);
|
|
irq_set_nested_thread(cur_irq, 1);
|
|
|
|
/* ARM needs us to explicitly flag the IRQ as valid
|
|
* and will set them noprobe when we do so. */
|
|
#ifdef CONFIG_ARM
|
|
set_irq_flags(cur_irq, IRQF_VALID);
|
|
#else
|
|
irq_set_noprobe(cur_irq);
|
|
#endif
|
|
}
|
|
|
|
ret = request_threaded_irq(wm8994->irq, NULL, wm8994_irq_thread,
|
|
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
|
|
"wm8994", wm8994);
|
|
if (ret != 0) {
|
|
dev_err(wm8994->dev, "Failed to request IRQ %d: %d\n",
|
|
wm8994->irq, ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Enable top level interrupt if it was masked */
|
|
wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void wm8994_irq_exit(struct wm8994 *wm8994)
|
|
{
|
|
if (wm8994->irq)
|
|
free_irq(wm8994->irq, wm8994);
|
|
}
|