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linux/arch/arm/mach-lpc32xx/irq.c
Thomas Gleixner bd0b9ac405 genirq: Remove irq argument from irq flow handlers 
Most interrupt flow handlers do not use the irq argument. Those few
which use it can retrieve the irq number from the irq descriptor.

Remove the argument.

Search and replace was done with coccinelle and some extra helper
scripts around it. Thanks to Julia for her help!

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
2015-09-16 15:47:51 +02:00

478 lines
12 KiB
C
Raw Blame History

/*
* arch/arm/mach-lpc32xx/irq.c
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2010 NXP Semiconductors
*
* 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.
*
* 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/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include "common.h"
/*
* Default value representing the Activation polarity of all internal
* interrupt sources
*/
#define MIC_APR_DEFAULT 0x3FF0EFE0
#define SIC1_APR_DEFAULT 0xFBD27186
#define SIC2_APR_DEFAULT 0x801810C0
/*
* Default value representing the Activation Type of all internal
* interrupt sources. All are level sensitive.
*/
#define MIC_ATR_DEFAULT 0x00000000
#define SIC1_ATR_DEFAULT 0x00026000
#define SIC2_ATR_DEFAULT 0x00000000
static struct irq_domain *lpc32xx_mic_domain;
static struct device_node *lpc32xx_mic_np;
struct lpc32xx_event_group_regs {
void __iomem *enab_reg;
void __iomem *edge_reg;
void __iomem *maskstat_reg;
void __iomem *rawstat_reg;
};
static const struct lpc32xx_event_group_regs lpc32xx_event_int_regs = {
.enab_reg = LPC32XX_CLKPWR_INT_ER,
.edge_reg = LPC32XX_CLKPWR_INT_AP,
.maskstat_reg = LPC32XX_CLKPWR_INT_SR,
.rawstat_reg = LPC32XX_CLKPWR_INT_RS,
};
static const struct lpc32xx_event_group_regs lpc32xx_event_pin_regs = {
.enab_reg = LPC32XX_CLKPWR_PIN_ER,
.edge_reg = LPC32XX_CLKPWR_PIN_AP,
.maskstat_reg = LPC32XX_CLKPWR_PIN_SR,
.rawstat_reg = LPC32XX_CLKPWR_PIN_RS,
};
struct lpc32xx_event_info {
const struct lpc32xx_event_group_regs *event_group;
u32 mask;
};
/*
* Maps an IRQ number to and event mask and register
*/
static const struct lpc32xx_event_info lpc32xx_events[NR_IRQS] = {
[IRQ_LPC32XX_GPI_08] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_08_BIT,
},
[IRQ_LPC32XX_GPI_09] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_09_BIT,
},
[IRQ_LPC32XX_GPI_19] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_19_BIT,
},
[IRQ_LPC32XX_GPI_07] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_07_BIT,
},
[IRQ_LPC32XX_GPI_00] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_00_BIT,
},
[IRQ_LPC32XX_GPI_01] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_01_BIT,
},
[IRQ_LPC32XX_GPI_02] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_02_BIT,
},
[IRQ_LPC32XX_GPI_03] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_03_BIT,
},
[IRQ_LPC32XX_GPI_04] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_04_BIT,
},
[IRQ_LPC32XX_GPI_05] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_05_BIT,
},
[IRQ_LPC32XX_GPI_06] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_06_BIT,
},
[IRQ_LPC32XX_GPI_28] = {
.event_group = &lpc32xx_event_pin_regs,
.mask = LPC32XX_CLKPWR_EXTSRC_GPI_28_BIT,
},
[IRQ_LPC32XX_GPIO_00] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_00_BIT,
},
[IRQ_LPC32XX_GPIO_01] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_01_BIT,
},
[IRQ_LPC32XX_GPIO_02] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_02_BIT,
},
[IRQ_LPC32XX_GPIO_03] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_03_BIT,
},
[IRQ_LPC32XX_GPIO_04] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_04_BIT,
},
[IRQ_LPC32XX_GPIO_05] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_GPIO_05_BIT,
},
[IRQ_LPC32XX_KEY] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_KEY_BIT,
},
[IRQ_LPC32XX_ETHERNET] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_MAC_BIT,
},
[IRQ_LPC32XX_USB_OTG_ATX] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_USBATXINT_BIT,
},
[IRQ_LPC32XX_USB_HOST] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_USB_BIT,
},
[IRQ_LPC32XX_RTC] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_RTC_BIT,
},
[IRQ_LPC32XX_MSTIMER] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT,
},
[IRQ_LPC32XX_TS_AUX] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_TS_AUX_BIT,
},
[IRQ_LPC32XX_TS_P] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_TS_P_BIT,
},
[IRQ_LPC32XX_TS_IRQ] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_ADC_BIT,
},
};
static void get_controller(unsigned int irq, unsigned int *base,
unsigned int *irqbit)
{
if (irq < 32) {
*base = LPC32XX_MIC_BASE;
*irqbit = 1 << irq;
} else if (irq < 64) {
*base = LPC32XX_SIC1_BASE;
*irqbit = 1 << (irq - 32);
} else {
*base = LPC32XX_SIC2_BASE;
*irqbit = 1 << (irq - 64);
}
}
static void lpc32xx_mask_irq(struct irq_data *d)
{
unsigned int reg, ctrl, mask;
get_controller(d->hwirq, &ctrl, &mask);
reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) & ~mask;
__raw_writel(reg, LPC32XX_INTC_MASK(ctrl));
}
static void lpc32xx_unmask_irq(struct irq_data *d)
{
unsigned int reg, ctrl, mask;
get_controller(d->hwirq, &ctrl, &mask);
reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) | mask;
__raw_writel(reg, LPC32XX_INTC_MASK(ctrl));
}
static void lpc32xx_ack_irq(struct irq_data *d)
{
unsigned int ctrl, mask;
get_controller(d->hwirq, &ctrl, &mask);
__raw_writel(mask, LPC32XX_INTC_RAW_STAT(ctrl));
/* Also need to clear pending wake event */
if (lpc32xx_events[d->hwirq].mask != 0)
__raw_writel(lpc32xx_events[d->hwirq].mask,
lpc32xx_events[d->hwirq].event_group->rawstat_reg);
}
static void __lpc32xx_set_irq_type(unsigned int irq, int use_high_level,
int use_edge)
{
unsigned int reg, ctrl, mask;
get_controller(irq, &ctrl, &mask);
/* Activation level, high or low */
reg = __raw_readl(LPC32XX_INTC_POLAR(ctrl));
if (use_high_level)
reg |= mask;
else
reg &= ~mask;
__raw_writel(reg, LPC32XX_INTC_POLAR(ctrl));
/* Activation type, edge or level */
reg = __raw_readl(LPC32XX_INTC_ACT_TYPE(ctrl));
if (use_edge)
reg |= mask;
else
reg &= ~mask;
__raw_writel(reg, LPC32XX_INTC_ACT_TYPE(ctrl));
/* Use same polarity for the wake events */
if (lpc32xx_events[irq].mask != 0) {
reg = __raw_readl(lpc32xx_events[irq].event_group->edge_reg);
if (use_high_level)
reg |= lpc32xx_events[irq].mask;
else
reg &= ~lpc32xx_events[irq].mask;
__raw_writel(reg, lpc32xx_events[irq].event_group->edge_reg);
}
}
static int lpc32xx_set_irq_type(struct irq_data *d, unsigned int type)
{
switch (type) {
case IRQ_TYPE_EDGE_RISING:
/* Rising edge sensitive */
__lpc32xx_set_irq_type(d->hwirq, 1, 1);
irq_set_handler_locked(d, handle_edge_irq);
break;
case IRQ_TYPE_EDGE_FALLING:
/* Falling edge sensitive */
__lpc32xx_set_irq_type(d->hwirq, 0, 1);
irq_set_handler_locked(d, handle_edge_irq);
break;
case IRQ_TYPE_LEVEL_LOW:
/* Low level sensitive */
__lpc32xx_set_irq_type(d->hwirq, 0, 0);
irq_set_handler_locked(d, handle_level_irq);
break;
case IRQ_TYPE_LEVEL_HIGH:
/* High level sensitive */
__lpc32xx_set_irq_type(d->hwirq, 1, 0);
irq_set_handler_locked(d, handle_level_irq);
break;
/* Other modes are not supported */
default:
return -EINVAL;
}
return 0;
}
static int lpc32xx_irq_wake(struct irq_data *d, unsigned int state)
{
unsigned long eventreg;
if (lpc32xx_events[d->hwirq].mask != 0) {
eventreg = __raw_readl(lpc32xx_events[d->hwirq].
event_group->enab_reg);
if (state)
eventreg |= lpc32xx_events[d->hwirq].mask;
else {
eventreg &= ~lpc32xx_events[d->hwirq].mask;
/*
* When disabling the wakeup, clear the latched
* event
*/
__raw_writel(lpc32xx_events[d->hwirq].mask,
lpc32xx_events[d->hwirq].
event_group->rawstat_reg);
}
__raw_writel(eventreg,
lpc32xx_events[d->hwirq].event_group->enab_reg);
return 0;
}
/* Clear event */
__raw_writel(lpc32xx_events[d->hwirq].mask,
lpc32xx_events[d->hwirq].event_group->rawstat_reg);
return -ENODEV;
}
static void __init lpc32xx_set_default_mappings(unsigned int apr,
unsigned int atr, unsigned int offset)
{
unsigned int i;
/* Set activation levels for each interrupt */
i = 0;
while (i < 32) {
__lpc32xx_set_irq_type(offset + i, ((apr >> i) & 0x1),
((atr >> i) & 0x1));
i++;
}
}
static struct irq_chip lpc32xx_irq_chip = {
.name = "MIC",
.irq_ack = lpc32xx_ack_irq,
.irq_mask = lpc32xx_mask_irq,
.irq_unmask = lpc32xx_unmask_irq,
.irq_set_type = lpc32xx_set_irq_type,
.irq_set_wake = lpc32xx_irq_wake
};
static void lpc32xx_sic1_handler(struct irq_desc *desc)
{
unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC1_BASE));
while (ints != 0) {
int irqno = fls(ints) - 1;
ints &= ~(1 << irqno);
generic_handle_irq(LPC32XX_SIC1_IRQ(irqno));
}
}
static void lpc32xx_sic2_handler(struct irq_desc *desc)
{
unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC2_BASE));
while (ints != 0) {
int irqno = fls(ints) - 1;
ints &= ~(1 << irqno);
generic_handle_irq(LPC32XX_SIC2_IRQ(irqno));
}
}
static int __init __lpc32xx_mic_of_init(struct device_node *node,
struct device_node *parent)
{
lpc32xx_mic_np = node;
return 0;
}
static const struct of_device_id mic_of_match[] __initconst = {
{ .compatible = "nxp,lpc3220-mic", .data = __lpc32xx_mic_of_init },
{ }
};
void __init lpc32xx_init_irq(void)
{
unsigned int i;
/* Setup MIC */
__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_MIC_BASE));
__raw_writel(MIC_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_MIC_BASE));
__raw_writel(MIC_ATR_DEFAULT, LPC32XX_INTC_ACT_TYPE(LPC32XX_MIC_BASE));
/* Setup SIC1 */
__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC1_BASE));
__raw_writel(SIC1_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC1_BASE));
__raw_writel(SIC1_ATR_DEFAULT,
LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC1_BASE));
/* Setup SIC2 */
__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC2_BASE));
__raw_writel(SIC2_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC2_BASE));
__raw_writel(SIC2_ATR_DEFAULT,
LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC2_BASE));
/* Configure supported IRQ's */
for (i = 0; i < NR_IRQS; i++) {
irq_set_chip_and_handler(i, &lpc32xx_irq_chip,
handle_level_irq);
irq_clear_status_flags(i, IRQ_NOREQUEST);
}
/* Set default mappings */
lpc32xx_set_default_mappings(MIC_APR_DEFAULT, MIC_ATR_DEFAULT, 0);
lpc32xx_set_default_mappings(SIC1_APR_DEFAULT, SIC1_ATR_DEFAULT, 32);
lpc32xx_set_default_mappings(SIC2_APR_DEFAULT, SIC2_ATR_DEFAULT, 64);
/* Initially disable all wake events */
__raw_writel(0, LPC32XX_CLKPWR_P01_ER);
__raw_writel(0, LPC32XX_CLKPWR_INT_ER);
__raw_writel(0, LPC32XX_CLKPWR_PIN_ER);
/*
* Default wake activation polarities, all pin sources are low edge
* triggered
*/
__raw_writel(LPC32XX_CLKPWR_INTSRC_TS_P_BIT |
LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT |
LPC32XX_CLKPWR_INTSRC_RTC_BIT,
LPC32XX_CLKPWR_INT_AP);
__raw_writel(0, LPC32XX_CLKPWR_PIN_AP);
/* Clear latched wake event states */
__raw_writel(__raw_readl(LPC32XX_CLKPWR_PIN_RS),
LPC32XX_CLKPWR_PIN_RS);
__raw_writel(__raw_readl(LPC32XX_CLKPWR_INT_RS),
LPC32XX_CLKPWR_INT_RS);
of_irq_init(mic_of_match);
lpc32xx_mic_domain = irq_domain_add_legacy(lpc32xx_mic_np, NR_IRQS,
0, 0, &irq_domain_simple_ops,
NULL);
if (!lpc32xx_mic_domain)
panic("Unable to add MIC irq domain\n");
/* MIC SUBIRQx interrupts will route handling to the chain handlers */
irq_set_chained_handler(IRQ_LPC32XX_SUB1IRQ, lpc32xx_sic1_handler);
irq_set_chained_handler(IRQ_LPC32XX_SUB2IRQ, lpc32xx_sic2_handler);
}
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