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linux-stable/arch/mips/vr41xx/common/icu.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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 you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

716 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* icu.c, Interrupt Control Unit routines for the NEC VR4100 series.
*
* Copyright (C) 2001-2002 MontaVista Software Inc.
* Author: Yoichi Yuasa <source@mvista.com>
* Copyright (C) 2003-2006 Yoichi Yuasa <yuasa@linux-mips.org>
*/
/*
* Changes:
* MontaVista Software Inc. <source@mvista.com>
* - New creation, NEC VR4122 and VR4131 are supported.
* - Added support for NEC VR4111 and VR4121.
*
* Yoichi Yuasa <yuasa@linux-mips.org>
* - Coped with INTASSIGN of NEC VR4133.
*/
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/smp.h>
#include <linux/types.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/vr41xx/irq.h>
#include <asm/vr41xx/vr41xx.h>
static void __iomem *icu1_base;
static void __iomem *icu2_base;
static unsigned char sysint1_assign[16] = {
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static unsigned char sysint2_assign[16] = {
2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
#define ICU1_TYPE1_BASE 0x0b000080UL
#define ICU2_TYPE1_BASE 0x0b000200UL
#define ICU1_TYPE2_BASE 0x0f000080UL
#define ICU2_TYPE2_BASE 0x0f0000a0UL
#define ICU1_SIZE 0x20
#define ICU2_SIZE 0x1c
#define SYSINT1REG 0x00
#define PIUINTREG 0x02
#define INTASSIGN0 0x04
#define INTASSIGN1 0x06
#define GIUINTLREG 0x08
#define DSIUINTREG 0x0a
#define MSYSINT1REG 0x0c
#define MPIUINTREG 0x0e
#define MAIUINTREG 0x10
#define MKIUINTREG 0x12
#define MMACINTREG 0x12
#define MGIUINTLREG 0x14
#define MDSIUINTREG 0x16
#define NMIREG 0x18
#define SOFTREG 0x1a
#define INTASSIGN2 0x1c
#define INTASSIGN3 0x1e
#define SYSINT2REG 0x00
#define GIUINTHREG 0x02
#define FIRINTREG 0x04
#define MSYSINT2REG 0x06
#define MGIUINTHREG 0x08
#define MFIRINTREG 0x0a
#define PCIINTREG 0x0c
#define PCIINT0 0x0001
#define SCUINTREG 0x0e
#define SCUINT0 0x0001
#define CSIINTREG 0x10
#define MPCIINTREG 0x12
#define MSCUINTREG 0x14
#define MCSIINTREG 0x16
#define BCUINTREG 0x18
#define BCUINTR 0x0001
#define MBCUINTREG 0x1a
#define SYSINT1_IRQ_TO_PIN(x) ((x) - SYSINT1_IRQ_BASE) /* Pin 0-15 */
#define SYSINT2_IRQ_TO_PIN(x) ((x) - SYSINT2_IRQ_BASE) /* Pin 0-15 */
#define INT_TO_IRQ(x) ((x) + 2) /* Int0-4 -> IRQ2-6 */
#define icu1_read(offset) readw(icu1_base + (offset))
#define icu1_write(offset, value) writew((value), icu1_base + (offset))
#define icu2_read(offset) readw(icu2_base + (offset))
#define icu2_write(offset, value) writew((value), icu2_base + (offset))
#define INTASSIGN_MAX 4
#define INTASSIGN_MASK 0x0007
static inline uint16_t icu1_set(uint8_t offset, uint16_t set)
{
uint16_t data;
data = icu1_read(offset);
data |= set;
icu1_write(offset, data);
return data;
}
static inline uint16_t icu1_clear(uint8_t offset, uint16_t clear)
{
uint16_t data;
data = icu1_read(offset);
data &= ~clear;
icu1_write(offset, data);
return data;
}
static inline uint16_t icu2_set(uint8_t offset, uint16_t set)
{
uint16_t data;
data = icu2_read(offset);
data |= set;
icu2_write(offset, data);
return data;
}
static inline uint16_t icu2_clear(uint8_t offset, uint16_t clear)
{
uint16_t data;
data = icu2_read(offset);
data &= ~clear;
icu2_write(offset, data);
return data;
}
void vr41xx_enable_piuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(PIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_set(MPIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_piuint);
void vr41xx_disable_piuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(PIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_clear(MPIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_piuint);
void vr41xx_enable_aiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(AIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_set(MAIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_aiuint);
void vr41xx_disable_aiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(AIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_clear(MAIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_aiuint);
void vr41xx_enable_kiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(KIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_set(MKIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_kiuint);
void vr41xx_disable_kiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(KIU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4111 ||
current_cpu_type() == CPU_VR4121) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_clear(MKIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_kiuint);
void vr41xx_enable_macint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(ETHERNET_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_set(MMACINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_enable_macint);
void vr41xx_disable_macint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(ETHERNET_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_clear(MMACINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_disable_macint);
void vr41xx_enable_dsiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(DSIU_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_set(MDSIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_enable_dsiuint);
void vr41xx_disable_dsiuint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(DSIU_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu1_clear(MDSIUINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_disable_dsiuint);
void vr41xx_enable_firint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(FIR_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_set(MFIRINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_enable_firint);
void vr41xx_disable_firint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(FIR_IRQ);
unsigned long flags;
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_clear(MFIRINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(vr41xx_disable_firint);
void vr41xx_enable_pciint(void)
{
struct irq_desc *desc = irq_to_desc(PCI_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MPCIINTREG, PCIINT0);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_pciint);
void vr41xx_disable_pciint(void)
{
struct irq_desc *desc = irq_to_desc(PCI_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MPCIINTREG, 0);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_pciint);
void vr41xx_enable_scuint(void)
{
struct irq_desc *desc = irq_to_desc(SCU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MSCUINTREG, SCUINT0);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_scuint);
void vr41xx_disable_scuint(void)
{
struct irq_desc *desc = irq_to_desc(SCU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MSCUINTREG, 0);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_scuint);
void vr41xx_enable_csiint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(CSI_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_set(MCSIINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_csiint);
void vr41xx_disable_csiint(uint16_t mask)
{
struct irq_desc *desc = irq_to_desc(CSI_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_clear(MCSIINTREG, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_csiint);
void vr41xx_enable_bcuint(void)
{
struct irq_desc *desc = irq_to_desc(BCU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MBCUINTREG, BCUINTR);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_enable_bcuint);
void vr41xx_disable_bcuint(void)
{
struct irq_desc *desc = irq_to_desc(BCU_IRQ);
unsigned long flags;
if (current_cpu_type() == CPU_VR4122 ||
current_cpu_type() == CPU_VR4131 ||
current_cpu_type() == CPU_VR4133) {
raw_spin_lock_irqsave(&desc->lock, flags);
icu2_write(MBCUINTREG, 0);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL(vr41xx_disable_bcuint);
static void disable_sysint1_irq(struct irq_data *d)
{
icu1_clear(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(d->irq));
}
static void enable_sysint1_irq(struct irq_data *d)
{
icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(d->irq));
}
static struct irq_chip sysint1_irq_type = {
.name = "SYSINT1",
.irq_mask = disable_sysint1_irq,
.irq_unmask = enable_sysint1_irq,
};
static void disable_sysint2_irq(struct irq_data *d)
{
icu2_clear(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(d->irq));
}
static void enable_sysint2_irq(struct irq_data *d)
{
icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(d->irq));
}
static struct irq_chip sysint2_irq_type = {
.name = "SYSINT2",
.irq_mask = disable_sysint2_irq,
.irq_unmask = enable_sysint2_irq,
};
static inline int set_sysint1_assign(unsigned int irq, unsigned char assign)
{
struct irq_desc *desc = irq_to_desc(irq);
uint16_t intassign0, intassign1;
unsigned int pin;
pin = SYSINT1_IRQ_TO_PIN(irq);
raw_spin_lock_irq(&desc->lock);
intassign0 = icu1_read(INTASSIGN0);
intassign1 = icu1_read(INTASSIGN1);
switch (pin) {
case 0:
intassign0 &= ~INTASSIGN_MASK;
intassign0 |= (uint16_t)assign;
break;
case 1:
intassign0 &= ~(INTASSIGN_MASK << 3);
intassign0 |= (uint16_t)assign << 3;
break;
case 2:
intassign0 &= ~(INTASSIGN_MASK << 6);
intassign0 |= (uint16_t)assign << 6;
break;
case 3:
intassign0 &= ~(INTASSIGN_MASK << 9);
intassign0 |= (uint16_t)assign << 9;
break;
case 8:
intassign0 &= ~(INTASSIGN_MASK << 12);
intassign0 |= (uint16_t)assign << 12;
break;
case 9:
intassign1 &= ~INTASSIGN_MASK;
intassign1 |= (uint16_t)assign;
break;
case 11:
intassign1 &= ~(INTASSIGN_MASK << 6);
intassign1 |= (uint16_t)assign << 6;
break;
case 12:
intassign1 &= ~(INTASSIGN_MASK << 9);
intassign1 |= (uint16_t)assign << 9;
break;
default:
raw_spin_unlock_irq(&desc->lock);
return -EINVAL;
}
sysint1_assign[pin] = assign;
icu1_write(INTASSIGN0, intassign0);
icu1_write(INTASSIGN1, intassign1);
raw_spin_unlock_irq(&desc->lock);
return 0;
}
static inline int set_sysint2_assign(unsigned int irq, unsigned char assign)
{
struct irq_desc *desc = irq_to_desc(irq);
uint16_t intassign2, intassign3;
unsigned int pin;
pin = SYSINT2_IRQ_TO_PIN(irq);
raw_spin_lock_irq(&desc->lock);
intassign2 = icu1_read(INTASSIGN2);
intassign3 = icu1_read(INTASSIGN3);
switch (pin) {
case 0:
intassign2 &= ~INTASSIGN_MASK;
intassign2 |= (uint16_t)assign;
break;
case 1:
intassign2 &= ~(INTASSIGN_MASK << 3);
intassign2 |= (uint16_t)assign << 3;
break;
case 3:
intassign2 &= ~(INTASSIGN_MASK << 6);
intassign2 |= (uint16_t)assign << 6;
break;
case 4:
intassign2 &= ~(INTASSIGN_MASK << 9);
intassign2 |= (uint16_t)assign << 9;
break;
case 5:
intassign2 &= ~(INTASSIGN_MASK << 12);
intassign2 |= (uint16_t)assign << 12;
break;
case 6:
intassign3 &= ~INTASSIGN_MASK;
intassign3 |= (uint16_t)assign;
break;
case 7:
intassign3 &= ~(INTASSIGN_MASK << 3);
intassign3 |= (uint16_t)assign << 3;
break;
case 8:
intassign3 &= ~(INTASSIGN_MASK << 6);
intassign3 |= (uint16_t)assign << 6;
break;
case 9:
intassign3 &= ~(INTASSIGN_MASK << 9);
intassign3 |= (uint16_t)assign << 9;
break;
case 10:
intassign3 &= ~(INTASSIGN_MASK << 12);
intassign3 |= (uint16_t)assign << 12;
break;
default:
raw_spin_unlock_irq(&desc->lock);
return -EINVAL;
}
sysint2_assign[pin] = assign;
icu1_write(INTASSIGN2, intassign2);
icu1_write(INTASSIGN3, intassign3);
raw_spin_unlock_irq(&desc->lock);
return 0;
}
int vr41xx_set_intassign(unsigned int irq, unsigned char intassign)
{
int retval = -EINVAL;
if (current_cpu_type() != CPU_VR4133)
return -EINVAL;
if (intassign > INTASSIGN_MAX)
return -EINVAL;
if (irq >= SYSINT1_IRQ_BASE && irq <= SYSINT1_IRQ_LAST)
retval = set_sysint1_assign(irq, intassign);
else if (irq >= SYSINT2_IRQ_BASE && irq <= SYSINT2_IRQ_LAST)
retval = set_sysint2_assign(irq, intassign);
return retval;
}
EXPORT_SYMBOL(vr41xx_set_intassign);
static int icu_get_irq(unsigned int irq)
{
uint16_t pend1, pend2;
uint16_t mask1, mask2;
int i;
pend1 = icu1_read(SYSINT1REG);
mask1 = icu1_read(MSYSINT1REG);
pend2 = icu2_read(SYSINT2REG);
mask2 = icu2_read(MSYSINT2REG);
mask1 &= pend1;
mask2 &= pend2;
if (mask1) {
for (i = 0; i < 16; i++) {
if (irq == INT_TO_IRQ(sysint1_assign[i]) && (mask1 & (1 << i)))
return SYSINT1_IRQ(i);
}
}
if (mask2) {
for (i = 0; i < 16; i++) {
if (irq == INT_TO_IRQ(sysint2_assign[i]) && (mask2 & (1 << i)))
return SYSINT2_IRQ(i);
}
}
printk(KERN_ERR "spurious ICU interrupt: %04x,%04x\n", pend1, pend2);
atomic_inc(&irq_err_count);
return -1;
}
static int __init vr41xx_icu_init(void)
{
unsigned long icu1_start, icu2_start;
int i;
switch (current_cpu_type()) {
case CPU_VR4111:
case CPU_VR4121:
icu1_start = ICU1_TYPE1_BASE;
icu2_start = ICU2_TYPE1_BASE;
break;
case CPU_VR4122:
case CPU_VR4131:
case CPU_VR4133:
icu1_start = ICU1_TYPE2_BASE;
icu2_start = ICU2_TYPE2_BASE;
break;
default:
printk(KERN_ERR "ICU: Unexpected CPU of NEC VR4100 series\n");
return -ENODEV;
}
if (request_mem_region(icu1_start, ICU1_SIZE, "ICU") == NULL)
return -EBUSY;
if (request_mem_region(icu2_start, ICU2_SIZE, "ICU") == NULL) {
release_mem_region(icu1_start, ICU1_SIZE);
return -EBUSY;
}
icu1_base = ioremap(icu1_start, ICU1_SIZE);
if (icu1_base == NULL) {
release_mem_region(icu1_start, ICU1_SIZE);
release_mem_region(icu2_start, ICU2_SIZE);
return -ENOMEM;
}
icu2_base = ioremap(icu2_start, ICU2_SIZE);
if (icu2_base == NULL) {
iounmap(icu1_base);
release_mem_region(icu1_start, ICU1_SIZE);
release_mem_region(icu2_start, ICU2_SIZE);
return -ENOMEM;
}
icu1_write(MSYSINT1REG, 0);
icu1_write(MGIUINTLREG, 0xffff);
icu2_write(MSYSINT2REG, 0);
icu2_write(MGIUINTHREG, 0xffff);
for (i = SYSINT1_IRQ_BASE; i <= SYSINT1_IRQ_LAST; i++)
irq_set_chip_and_handler(i, &sysint1_irq_type,
handle_level_irq);
for (i = SYSINT2_IRQ_BASE; i <= SYSINT2_IRQ_LAST; i++)
irq_set_chip_and_handler(i, &sysint2_irq_type,
handle_level_irq);
cascade_irq(INT0_IRQ, icu_get_irq);
cascade_irq(INT1_IRQ, icu_get_irq);
cascade_irq(INT2_IRQ, icu_get_irq);
cascade_irq(INT3_IRQ, icu_get_irq);
cascade_irq(INT4_IRQ, icu_get_irq);
return 0;
}
core_initcall(vr41xx_icu_init);
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