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/*
* Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
* Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <asm/oplib.h>
#include <asm/timer.h>
#include <asm/prom.h>
#include <asm/leon.h>
#include <asm/leon_amba.h>
#include "prom.h"
#include "irq.h"
struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */
struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */
struct amba_apb_device leon_percpu_timer_dev[16];
int leondebug_irq_disable;
int leon_debug_irqout;
static int dummy_master_l10_counter;
unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */
unsigned int sparc_leon_eirq;
#define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
/* Return the IRQ of the pending IRQ on the extended IRQ controller */
int sparc_leon_eirq_get(int eirq, int cpu)
{
return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
}
irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id)
{
printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n");
return IRQ_HANDLED;
}
/* The extended IRQ controller has been found, this function registers it */
void sparc_leon_eirq_register(int eirq)
{
int irq;
/* Register a "BAD" handler for this interrupt, it should never happen */
irq = request_irq(eirq, sparc_leon_eirq_isr,
(IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL);
if (irq) {
printk(KERN_ERR
"sparc_leon_eirq_register: unable to attach IRQ%d\n",
eirq);
} else {
sparc_leon_eirq = eirq;
}
}
static inline unsigned long get_irqmask(unsigned int irq)
{
unsigned long mask;
if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
|| ((irq > 0x1f) && sparc_leon_eirq)) {
printk(KERN_ERR
"leon_get_irqmask: false irq number: %d\n", irq);
mask = 0;
} else {
mask = LEON_HARD_INT(irq);
}
return mask;
}
static void leon_enable_irq(unsigned int irq_nr)
{
unsigned long mask, flags;
mask = get_irqmask(irq_nr);
local_irq_save(flags);
LEON3_BYPASS_STORE_PA(LEON_IMASK,
(LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
local_irq_restore(flags);
}
static void leon_disable_irq(unsigned int irq_nr)
{
unsigned long mask, flags;
mask = get_irqmask(irq_nr);
local_irq_save(flags);
LEON3_BYPASS_STORE_PA(LEON_IMASK,
(LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
local_irq_restore(flags);
}
void __init leon_init_timers(irq_handler_t counter_fn)
{
int irq;
leondebug_irq_disable = 0;
leon_debug_irqout = 0;
master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
dummy_master_l10_counter = 0;
if (leon3_gptimer_regs && leon3_irqctrl_regs) {
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
(((1000000 / 100) - 1)));
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0);
} else {
printk(KERN_ERR "No Timer/irqctrl found\n");
BUG();
}
irq = request_irq(leon3_gptimer_irq,
counter_fn,
(IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
if (irq) {
printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
LEON_INTERRUPT_TIMER1);
prom_halt();
}
if (leon3_gptimer_regs) {
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl,
LEON3_GPTIMER_EN |
LEON3_GPTIMER_RL |
LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
}
}
void leon_clear_clock_irq(void)
{
}
void leon_load_profile_irq(int cpu, unsigned int limit)
{
BUG();
}
void __init leon_trans_init(struct device_node *dp)
{
if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
struct property *p;
p = of_find_property(dp, "mid", (void *)0);
if (p) {
int mid;
dp->name = prom_early_alloc(5 + 1);
memcpy(&mid, p->value, p->length);
sprintf((char *)dp->name, "cpu%.2d", mid);
}
}
}
void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;
void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
{
if (prom_amba_init &&
strcmp(dp->type, "ambapp") == 0 &&
strcmp(dp->name, "ambapp0") == 0) {
prom_amba_init(dp, nextp);
}
}
void __init leon_init_IRQ(void)
{
sparc_init_timers = leon_init_timers;
BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
BTFIXUPCALL_NOP);
#ifdef CONFIG_SMP
BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
#endif
}
void __init leon_init(void)
{
prom_build_more = &leon_node_init;
}
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