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acrn-kernel/arch/blackfin/mach-common/ints-priority.c

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/*
* File: arch/blackfin/mach-common/ints-priority.c
* Based on:
* Author:
*
* Created: ?
* Description: Set up the interrupt priorities
*
* Modified:
* 1996 Roman Zippel
* 1999 D. Jeff Dionne <jeff@uclinux.org>
* 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
* 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
* 2003 Metrowerks/Motorola
* 2003 Bas Vermeulen <bas@buyways.nl>
* Copyright 2004-2008 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* 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, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/kernel_stat.h>
#include <linux/seq_file.h>
#include <linux/irq.h>
#ifdef CONFIG_KGDB
#include <linux/kgdb.h>
#endif
#include <asm/traps.h>
#include <asm/blackfin.h>
#include <asm/gpio.h>
#include <asm/irq_handler.h>
#ifdef BF537_FAMILY
# define BF537_GENERIC_ERROR_INT_DEMUX
#else
# undef BF537_GENERIC_ERROR_INT_DEMUX
#endif
/*
* NOTES:
* - we have separated the physical Hardware interrupt from the
* levels that the LINUX kernel sees (see the description in irq.h)
* -
*/
/* Initialize this to an actual value to force it into the .data
* section so that we know it is properly initialized at entry into
* the kernel but before bss is initialized to zero (which is where
* it would live otherwise). The 0x1f magic represents the IRQs we
* cannot actually mask out in hardware.
*/
unsigned long irq_flags = 0x1f;
/* The number of spurious interrupts */
atomic_t num_spurious;
#ifdef CONFIG_PM
unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */
#endif
struct ivgx {
/* irq number for request_irq, available in mach-bf5xx/irq.h */
unsigned int irqno;
/* corresponding bit in the SIC_ISR register */
unsigned int isrflag;
} ivg_table[NR_PERI_INTS];
struct ivg_slice {
/* position of first irq in ivg_table for given ivg */
struct ivgx *ifirst;
struct ivgx *istop;
} ivg7_13[IVG13 - IVG7 + 1];
/*
* Search SIC_IAR and fill tables with the irqvalues
* and their positions in the SIC_ISR register.
*/
static void __init search_IAR(void)
{
unsigned ivg, irq_pos = 0;
for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
int irqn;
ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
for (irqn = 0; irqn < NR_PERI_INTS; irqn++) {
int iar_shift = (irqn & 7) * 4;
if (ivg == (0xf &
#ifndef CONFIG_BF52x
bfin_read32((unsigned long *)SIC_IAR0 +
(irqn >> 3)) >> iar_shift)) {
#else
bfin_read32((unsigned long *)SIC_IAR0 +
((irqn%32) >> 3) + ((irqn / 32) * 16)) >> iar_shift)) {
#endif
ivg_table[irq_pos].irqno = IVG7 + irqn;
ivg_table[irq_pos].isrflag = 1 << (irqn % 32);
ivg7_13[ivg].istop++;
irq_pos++;
}
}
}
}
/*
* This is for core internal IRQs
*/
static void bfin_ack_noop(unsigned int irq)
{
/* Dummy function. */
}
static void bfin_core_mask_irq(unsigned int irq)
{
irq_flags &= ~(1 << irq);
if (!irqs_disabled())
local_irq_enable();
}
static void bfin_core_unmask_irq(unsigned int irq)
{
irq_flags |= 1 << irq;
/*
* If interrupts are enabled, IMASK must contain the same value
* as irq_flags. Make sure that invariant holds. If interrupts
* are currently disabled we need not do anything; one of the
* callers will take care of setting IMASK to the proper value
* when reenabling interrupts.
* local_irq_enable just does "STI irq_flags", so it's exactly
* what we need.
*/
if (!irqs_disabled())
local_irq_enable();
return;
}
static void bfin_internal_mask_irq(unsigned int irq)
{
#ifdef CONFIG_BF53x
bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
~(1 << SIC_SYSIRQ(irq)));
#else
unsigned mask_bank, mask_bit;
mask_bank = SIC_SYSIRQ(irq) / 32;
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
~(1 << mask_bit));
#endif
SSYNC();
}
static void bfin_internal_unmask_irq(unsigned int irq)
{
#ifdef CONFIG_BF53x
bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
(1 << SIC_SYSIRQ(irq)));
#else
unsigned mask_bank, mask_bit;
mask_bank = SIC_SYSIRQ(irq) / 32;
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) |
(1 << mask_bit));
#endif
SSYNC();
}
#ifdef CONFIG_PM
int bfin_internal_set_wake(unsigned int irq, unsigned int state)
{
unsigned bank, bit;
unsigned long flags;
bank = SIC_SYSIRQ(irq) / 32;
bit = SIC_SYSIRQ(irq) % 32;
local_irq_save(flags);
if (state)
bfin_sic_iwr[bank] |= (1 << bit);
else
bfin_sic_iwr[bank] &= ~(1 << bit);
local_irq_restore(flags);
return 0;
}
#endif
static struct irq_chip bfin_core_irqchip = {
.ack = bfin_ack_noop,
.mask = bfin_core_mask_irq,
.unmask = bfin_core_unmask_irq,
};
static struct irq_chip bfin_internal_irqchip = {
.ack = bfin_ack_noop,
.mask = bfin_internal_mask_irq,
.unmask = bfin_internal_unmask_irq,
.mask_ack = bfin_internal_mask_irq,
.disable = bfin_internal_mask_irq,
.enable = bfin_internal_unmask_irq,
#ifdef CONFIG_PM
.set_wake = bfin_internal_set_wake,
#endif
};
#ifdef BF537_GENERIC_ERROR_INT_DEMUX
static int error_int_mask;
static void bfin_generic_error_mask_irq(unsigned int irq)
{
error_int_mask &= ~(1L << (irq - IRQ_PPI_ERROR));
if (!error_int_mask)
bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
}
static void bfin_generic_error_unmask_irq(unsigned int irq)
{
bfin_internal_unmask_irq(IRQ_GENERIC_ERROR);
error_int_mask |= 1L << (irq - IRQ_PPI_ERROR);
}
static struct irq_chip bfin_generic_error_irqchip = {
.ack = bfin_ack_noop,
.mask_ack = bfin_generic_error_mask_irq,
.mask = bfin_generic_error_mask_irq,
.unmask = bfin_generic_error_unmask_irq,
};
static void bfin_demux_error_irq(unsigned int int_err_irq,
struct irq_desc *inta_desc)
{
int irq = 0;
SSYNC();
#if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
if (bfin_read_EMAC_SYSTAT() & EMAC_ERR_MASK)
irq = IRQ_MAC_ERROR;
else
#endif
if (bfin_read_SPORT0_STAT() & SPORT_ERR_MASK)
irq = IRQ_SPORT0_ERROR;
else if (bfin_read_SPORT1_STAT() & SPORT_ERR_MASK)
irq = IRQ_SPORT1_ERROR;
else if (bfin_read_PPI_STATUS() & PPI_ERR_MASK)
irq = IRQ_PPI_ERROR;
else if (bfin_read_CAN_GIF() & CAN_ERR_MASK)
irq = IRQ_CAN_ERROR;
else if (bfin_read_SPI_STAT() & SPI_ERR_MASK)
irq = IRQ_SPI_ERROR;
else if ((bfin_read_UART0_IIR() & UART_ERR_MASK_STAT1) &&
(bfin_read_UART0_IIR() & UART_ERR_MASK_STAT0))
irq = IRQ_UART0_ERROR;
else if ((bfin_read_UART1_IIR() & UART_ERR_MASK_STAT1) &&
(bfin_read_UART1_IIR() & UART_ERR_MASK_STAT0))
irq = IRQ_UART1_ERROR;
if (irq) {
if (error_int_mask & (1L << (irq - IRQ_PPI_ERROR))) {
struct irq_desc *desc = irq_desc + irq;
desc->handle_irq(irq, desc);
} else {
switch (irq) {
case IRQ_PPI_ERROR:
bfin_write_PPI_STATUS(PPI_ERR_MASK);
break;
#if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
case IRQ_MAC_ERROR:
bfin_write_EMAC_SYSTAT(EMAC_ERR_MASK);
break;
#endif
case IRQ_SPORT0_ERROR:
bfin_write_SPORT0_STAT(SPORT_ERR_MASK);
break;
case IRQ_SPORT1_ERROR:
bfin_write_SPORT1_STAT(SPORT_ERR_MASK);
break;
case IRQ_CAN_ERROR:
bfin_write_CAN_GIS(CAN_ERR_MASK);
break;
case IRQ_SPI_ERROR:
bfin_write_SPI_STAT(SPI_ERR_MASK);
break;
default:
break;
}
pr_debug("IRQ %d:"
" MASKED PERIPHERAL ERROR INTERRUPT ASSERTED\n",
irq);
}
} else
printk(KERN_ERR
"%s : %s : LINE %d :\nIRQ ?: PERIPHERAL ERROR"
" INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
__func__, __FILE__, __LINE__);
}
#endif /* BF537_GENERIC_ERROR_INT_DEMUX */
#if !defined(CONFIG_BF54x)
static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
static unsigned short gpio_edge_triggered[gpio_bank(MAX_BLACKFIN_GPIOS)];
extern void bfin_gpio_irq_prepare(unsigned gpio);
static void bfin_gpio_ack_irq(unsigned int irq)
{
u16 gpionr = irq - IRQ_PF0;
if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
set_gpio_data(gpionr, 0);
SSYNC();
}
}
static void bfin_gpio_mask_ack_irq(unsigned int irq)
{
u16 gpionr = irq - IRQ_PF0;
if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
set_gpio_data(gpionr, 0);
SSYNC();
}
set_gpio_maska(gpionr, 0);
SSYNC();
}
static void bfin_gpio_mask_irq(unsigned int irq)
{
set_gpio_maska(irq - IRQ_PF0, 0);
SSYNC();
}
static void bfin_gpio_unmask_irq(unsigned int irq)
{
set_gpio_maska(irq - IRQ_PF0, 1);
SSYNC();
}
static unsigned int bfin_gpio_irq_startup(unsigned int irq)
{
u16 gpionr = irq - IRQ_PF0;
if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
bfin_gpio_irq_prepare(gpionr);
gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
bfin_gpio_unmask_irq(irq);
return 0;
}
static void bfin_gpio_irq_shutdown(unsigned int irq)
{
bfin_gpio_mask_irq(irq);
gpio_enabled[gpio_bank(irq - IRQ_PF0)] &= ~gpio_bit(irq - IRQ_PF0);
}
static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
{
u16 gpionr = irq - IRQ_PF0;
if (type == IRQ_TYPE_PROBE) {
/* only probe unenabled GPIO interrupt lines */
if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
return 0;
type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
}
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
bfin_gpio_irq_prepare(gpionr);
gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
} else {
gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
return 0;
}
set_gpio_inen(gpionr, 0);
set_gpio_dir(gpionr, 0);
if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
== (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
set_gpio_both(gpionr, 1);
else
set_gpio_both(gpionr, 0);
if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */
else
set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
set_gpio_edge(gpionr, 1);
set_gpio_inen(gpionr, 1);
gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
set_gpio_data(gpionr, 0);
} else {
set_gpio_edge(gpionr, 0);
gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
set_gpio_inen(gpionr, 1);
}
SSYNC();
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
set_irq_handler(irq, handle_edge_irq);
else
set_irq_handler(irq, handle_level_irq);
return 0;
}
#ifdef CONFIG_PM
int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
{
unsigned gpio = irq_to_gpio(irq);
if (state)
gpio_pm_wakeup_request(gpio, PM_WAKE_IGNORE);
else
gpio_pm_wakeup_free(gpio);
return 0;
}
#endif
static struct irq_chip bfin_gpio_irqchip = {
.ack = bfin_gpio_ack_irq,
.mask = bfin_gpio_mask_irq,
.mask_ack = bfin_gpio_mask_ack_irq,
.unmask = bfin_gpio_unmask_irq,
.set_type = bfin_gpio_irq_type,
.startup = bfin_gpio_irq_startup,
.shutdown = bfin_gpio_irq_shutdown,
#ifdef CONFIG_PM
.set_wake = bfin_gpio_set_wake,
#endif
};
static void bfin_demux_gpio_irq(unsigned int inta_irq,
struct irq_desc *desc)
{
unsigned int i, gpio, mask, irq, search = 0;
switch (inta_irq) {
#if defined(CONFIG_BF53x)
case IRQ_PROG_INTA:
irq = IRQ_PF0;
search = 1;
break;
# if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
case IRQ_MAC_RX:
irq = IRQ_PH0;
break;
# endif
#elif defined(CONFIG_BF52x)
case IRQ_PORTF_INTA:
irq = IRQ_PF0;
break;
case IRQ_PORTG_INTA:
irq = IRQ_PG0;
break;
case IRQ_PORTH_INTA:
irq = IRQ_PH0;
break;
#elif defined(CONFIG_BF561)
case IRQ_PROG0_INTA:
irq = IRQ_PF0;
break;
case IRQ_PROG1_INTA:
irq = IRQ_PF16;
break;
case IRQ_PROG2_INTA:
irq = IRQ_PF32;
break;
#endif
default:
BUG();
return;
}
if (search) {
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
irq += i;
mask = get_gpiop_data(i) &
(gpio_enabled[gpio_bank(i)] &
get_gpiop_maska(i));
while (mask) {
if (mask & 1) {
desc = irq_desc + irq;
desc->handle_irq(irq, desc);
}
irq++;
mask >>= 1;
}
}
} else {
gpio = irq_to_gpio(irq);
mask = get_gpiop_data(gpio) &
(gpio_enabled[gpio_bank(gpio)] &
get_gpiop_maska(gpio));
do {
if (mask & 1) {
desc = irq_desc + irq;
desc->handle_irq(irq, desc);
}
irq++;
mask >>= 1;
} while (mask);
}
}
#else /* CONFIG_BF54x */
#define NR_PINT_SYS_IRQS 4
#define NR_PINT_BITS 32
#define NR_PINTS 160
#define IRQ_NOT_AVAIL 0xFF
#define PINT_2_BANK(x) ((x) >> 5)
#define PINT_2_BIT(x) ((x) & 0x1F)
#define PINT_BIT(x) (1 << (PINT_2_BIT(x)))
static unsigned char irq2pint_lut[NR_PINTS];
static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS];
static unsigned int gpio_both_edge_triggered[NR_PINT_SYS_IRQS];
static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
struct pin_int_t {
unsigned int mask_set;
unsigned int mask_clear;
unsigned int request;
unsigned int assign;
unsigned int edge_set;
unsigned int edge_clear;
unsigned int invert_set;
unsigned int invert_clear;
unsigned int pinstate;
unsigned int latch;
};
static struct pin_int_t *pint[NR_PINT_SYS_IRQS] = {
(struct pin_int_t *)PINT0_MASK_SET,
(struct pin_int_t *)PINT1_MASK_SET,
(struct pin_int_t *)PINT2_MASK_SET,
(struct pin_int_t *)PINT3_MASK_SET,
};
extern void bfin_gpio_irq_prepare(unsigned gpio);
inline unsigned short get_irq_base(u8 bank, u8 bmap)
{
u16 irq_base;
if (bank < 2) { /*PA-PB */
irq_base = IRQ_PA0 + bmap * 16;
} else { /*PC-PJ */
irq_base = IRQ_PC0 + bmap * 16;
}
return irq_base;
}
/* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
void init_pint_lut(void)
{
u16 bank, bit, irq_base, bit_pos;
u32 pint_assign;
u8 bmap;
memset(irq2pint_lut, IRQ_NOT_AVAIL, sizeof(irq2pint_lut));
for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) {
pint_assign = pint[bank]->assign;
for (bit = 0; bit < NR_PINT_BITS; bit++) {
bmap = (pint_assign >> ((bit / 8) * 8)) & 0xFF;
irq_base = get_irq_base(bank, bmap);
irq_base += (bit % 8) + ((bit / 8) & 1 ? 8 : 0);
bit_pos = bit + bank * NR_PINT_BITS;
pint2irq_lut[bit_pos] = irq_base - SYS_IRQS;
irq2pint_lut[irq_base - SYS_IRQS] = bit_pos;
}
}
}
static void bfin_gpio_ack_irq(unsigned int irq)
{
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
if (pint[bank]->invert_set & pintbit)
pint[bank]->invert_clear = pintbit;
else
pint[bank]->invert_set = pintbit;
}
pint[bank]->request = pintbit;
SSYNC();
}
static void bfin_gpio_mask_ack_irq(unsigned int irq)
{
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
if (pint[bank]->invert_set & pintbit)
pint[bank]->invert_clear = pintbit;
else
pint[bank]->invert_set = pintbit;
}
pint[bank]->request = pintbit;
pint[bank]->mask_clear = pintbit;
SSYNC();
}
static void bfin_gpio_mask_irq(unsigned int irq)
{
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
pint[PINT_2_BANK(pint_val)]->mask_clear = PINT_BIT(pint_val);
SSYNC();
}
static void bfin_gpio_unmask_irq(unsigned int irq)
{
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
pint[bank]->request = pintbit;
pint[bank]->mask_set = pintbit;
SSYNC();
}
static unsigned int bfin_gpio_irq_startup(unsigned int irq)
{
u16 gpionr = irq_to_gpio(irq);
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
if (pint_val == IRQ_NOT_AVAIL) {
printk(KERN_ERR
"GPIO IRQ %d :Not in PINT Assign table "
"Reconfigure Interrupt to Port Assignemt\n", irq);
return -ENODEV;
}
if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
bfin_gpio_irq_prepare(gpionr);
gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
bfin_gpio_unmask_irq(irq);
return 0;
}
static void bfin_gpio_irq_shutdown(unsigned int irq)
{
u16 gpionr = irq_to_gpio(irq);
bfin_gpio_mask_irq(irq);
gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
}
static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
{
u16 gpionr = irq_to_gpio(irq);
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
if (pint_val == IRQ_NOT_AVAIL)
return -ENODEV;
if (type == IRQ_TYPE_PROBE) {
/* only probe unenabled GPIO interrupt lines */
if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
return 0;
type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
}
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr)))
bfin_gpio_irq_prepare(gpionr);
gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
} else {
gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
return 0;
}
if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
pint[bank]->invert_set = pintbit; /* low or falling edge denoted by one */
else
pint[bank]->invert_clear = pintbit; /* high or rising edge denoted by zero */
if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
== (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
gpio_both_edge_triggered[bank] |= pintbit;
if (gpio_get_value(gpionr))
pint[bank]->invert_set = pintbit;
else
pint[bank]->invert_clear = pintbit;
} else {
gpio_both_edge_triggered[bank] &= ~pintbit;
}
if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
pint[bank]->edge_set = pintbit;
set_irq_handler(irq, handle_edge_irq);
} else {
pint[bank]->edge_clear = pintbit;
set_irq_handler(irq, handle_level_irq);
}
SSYNC();
return 0;
}
#ifdef CONFIG_PM
u32 pint_saved_masks[NR_PINT_SYS_IRQS];
u32 pint_wakeup_masks[NR_PINT_SYS_IRQS];
int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
{
u32 pint_irq;
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 bank = PINT_2_BANK(pint_val);
u32 pintbit = PINT_BIT(pint_val);
switch (bank) {
case 0:
pint_irq = IRQ_PINT0;
break;
case 2:
pint_irq = IRQ_PINT2;
break;
case 3:
pint_irq = IRQ_PINT3;
break;
case 1:
pint_irq = IRQ_PINT1;
break;
default:
return -EINVAL;
}
bfin_internal_set_wake(pint_irq, state);
if (state)
pint_wakeup_masks[bank] |= pintbit;
else
pint_wakeup_masks[bank] &= ~pintbit;
return 0;
}
u32 bfin_pm_setup(void)
{
u32 val, i;
for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
val = pint[i]->mask_clear;
pint_saved_masks[i] = val;
if (val ^ pint_wakeup_masks[i]) {
pint[i]->mask_clear = val;
pint[i]->mask_set = pint_wakeup_masks[i];
}
}
return 0;
}
void bfin_pm_restore(void)
{
u32 i, val;
for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
val = pint_saved_masks[i];
if (val ^ pint_wakeup_masks[i]) {
pint[i]->mask_clear = pint[i]->mask_clear;
pint[i]->mask_set = val;
}
}
}
#endif
static struct irq_chip bfin_gpio_irqchip = {
.ack = bfin_gpio_ack_irq,
.mask = bfin_gpio_mask_irq,
.mask_ack = bfin_gpio_mask_ack_irq,
.unmask = bfin_gpio_unmask_irq,
.set_type = bfin_gpio_irq_type,
.startup = bfin_gpio_irq_startup,
.shutdown = bfin_gpio_irq_shutdown,
#ifdef CONFIG_PM
.set_wake = bfin_gpio_set_wake,
#endif
};
static void bfin_demux_gpio_irq(unsigned int inta_irq,
struct irq_desc *desc)
{
u8 bank, pint_val;
u32 request, irq;
switch (inta_irq) {
case IRQ_PINT0:
bank = 0;
break;
case IRQ_PINT2:
bank = 2;
break;
case IRQ_PINT3:
bank = 3;
break;
case IRQ_PINT1:
bank = 1;
break;
default:
return;
}
pint_val = bank * NR_PINT_BITS;
request = pint[bank]->request;
while (request) {
if (request & 1) {
irq = pint2irq_lut[pint_val] + SYS_IRQS;
desc = irq_desc + irq;
desc->handle_irq(irq, desc);
}
pint_val++;
request >>= 1;
}
}
#endif
void __init init_exception_vectors(void)
{
SSYNC();
/* cannot program in software:
* evt0 - emulation (jtag)
* evt1 - reset
*/
bfin_write_EVT2(evt_nmi);
bfin_write_EVT3(trap);
bfin_write_EVT5(evt_ivhw);
bfin_write_EVT6(evt_timer);
bfin_write_EVT7(evt_evt7);
bfin_write_EVT8(evt_evt8);
bfin_write_EVT9(evt_evt9);
bfin_write_EVT10(evt_evt10);
bfin_write_EVT11(evt_evt11);
bfin_write_EVT12(evt_evt12);
bfin_write_EVT13(evt_evt13);
bfin_write_EVT14(evt14_softirq);
bfin_write_EVT15(evt_system_call);
CSYNC();
}
/*
* This function should be called during kernel startup to initialize
* the BFin IRQ handling routines.
*/
int __init init_arch_irq(void)
{
int irq;
unsigned long ilat = 0;
/* Disable all the peripheral intrs - page 4-29 HW Ref manual */
#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561)
bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
# ifdef CONFIG_BF54x
bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
# endif
#else
bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
#endif
local_irq_disable();
#ifdef CONFIG_BF54x
# ifdef CONFIG_PINTx_REASSIGN
pint[0]->assign = CONFIG_PINT0_ASSIGN;
pint[1]->assign = CONFIG_PINT1_ASSIGN;
pint[2]->assign = CONFIG_PINT2_ASSIGN;
pint[3]->assign = CONFIG_PINT3_ASSIGN;
# endif
/* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */
init_pint_lut();
#endif
for (irq = 0; irq <= SYS_IRQS; irq++) {
if (irq <= IRQ_CORETMR)
set_irq_chip(irq, &bfin_core_irqchip);
else
set_irq_chip(irq, &bfin_internal_irqchip);
switch (irq) {
#if defined(CONFIG_BF53x)
case IRQ_PROG_INTA:
# if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
case IRQ_MAC_RX:
# endif
#elif defined(CONFIG_BF54x)
case IRQ_PINT0:
case IRQ_PINT1:
case IRQ_PINT2:
case IRQ_PINT3:
#elif defined(CONFIG_BF52x)
case IRQ_PORTF_INTA:
case IRQ_PORTG_INTA:
case IRQ_PORTH_INTA:
#elif defined(CONFIG_BF561)
case IRQ_PROG0_INTA:
case IRQ_PROG1_INTA:
case IRQ_PROG2_INTA:
#endif
set_irq_chained_handler(irq,
bfin_demux_gpio_irq);
break;
#ifdef BF537_GENERIC_ERROR_INT_DEMUX
case IRQ_GENERIC_ERROR:
set_irq_handler(irq, bfin_demux_error_irq);
break;
#endif
default:
set_irq_handler(irq, handle_simple_irq);
break;
}
}
#ifdef BF537_GENERIC_ERROR_INT_DEMUX
for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
set_irq_chip_and_handler(irq, &bfin_generic_error_irqchip,
handle_level_irq);
#endif
/* if configured as edge, then will be changed to do_edge_IRQ */
for (irq = GPIO_IRQ_BASE; irq < NR_IRQS; irq++)
set_irq_chip_and_handler(irq, &bfin_gpio_irqchip,
handle_level_irq);
bfin_write_IMASK(0);
CSYNC();
ilat = bfin_read_ILAT();
CSYNC();
bfin_write_ILAT(ilat);
CSYNC();
printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
/* IMASK=xxx is equivalent to STI xx or irq_flags=xx,
* local_irq_enable()
*/
program_IAR();
/* Therefore it's better to setup IARs before interrupts enabled */
search_IAR();
/* Enable interrupts IVG7-15 */
irq_flags = irq_flags | IMASK_IVG15 |
IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561)
bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
# ifdef CONFIG_BF54x
bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
# endif
#else
bfin_write_SIC_IWR(IWR_ENABLE_ALL);
#endif
return 0;
}
#ifdef CONFIG_DO_IRQ_L1
__attribute__((l1_text))
#endif
void do_irq(int vec, struct pt_regs *fp)
{
if (vec == EVT_IVTMR_P) {
vec = IRQ_CORETMR;
} else {
struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561)
unsigned long sic_status[3];
sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
#ifdef CONFIG_BF54x
sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
#endif
for (;; ivg++) {
if (ivg >= ivg_stop) {
atomic_inc(&num_spurious);
return;
}
if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
break;
}
#else
unsigned long sic_status;
sic_status = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
for (;; ivg++) {
if (ivg >= ivg_stop) {
atomic_inc(&num_spurious);
return;
} else if (sic_status & ivg->isrflag)
break;
}
#endif
vec = ivg->irqno;
}
asm_do_IRQ(vec, fp);
#ifdef CONFIG_KGDB
kgdb_process_breakpoint();
#endif
}
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