You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
247 lines
5.8 KiB
247 lines
5.8 KiB
/*
|
|
* linux/arch/arm/mach-h720x/common.c
|
|
*
|
|
* Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de>
|
|
* 2003 Robert Schwebel <r.schwebel@pengutronix.de>
|
|
* 2004 Sascha Hauer <s.hauer@pengutronix.de>
|
|
*
|
|
* common stuff for Hynix h720x processors
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/arch/irqs.h>
|
|
|
|
#include <asm/mach/dma.h>
|
|
|
|
#if 0
|
|
#define IRQDBG(args...) printk(args)
|
|
#else
|
|
#define IRQDBG(args...) do {} while(0)
|
|
#endif
|
|
|
|
void __init arch_dma_init(dma_t *dma)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Return usecs since last timer reload
|
|
* (timercount * (usecs perjiffie)) / (ticks per jiffie)
|
|
*/
|
|
unsigned long h720x_gettimeoffset(void)
|
|
{
|
|
return (CPU_REG (TIMER_VIRT, TM0_COUNT) * tick_usec) / LATCH;
|
|
}
|
|
|
|
/*
|
|
* mask Global irq's
|
|
*/
|
|
static void mask_global_irq (unsigned int irq )
|
|
{
|
|
CPU_REG (IRQC_VIRT, IRQC_IER) &= ~(1 << irq);
|
|
}
|
|
|
|
/*
|
|
* unmask Global irq's
|
|
*/
|
|
static void unmask_global_irq (unsigned int irq )
|
|
{
|
|
CPU_REG (IRQC_VIRT, IRQC_IER) |= (1 << irq);
|
|
}
|
|
|
|
|
|
/*
|
|
* ack GPIO irq's
|
|
* Ack only for edge triggered int's valid
|
|
*/
|
|
static void inline ack_gpio_irq(u32 irq)
|
|
{
|
|
u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
|
|
u32 bit = IRQ_TO_BIT(irq);
|
|
if ( (CPU_REG (reg_base, GPIO_EDGE) & bit))
|
|
CPU_REG (reg_base, GPIO_CLR) = bit;
|
|
}
|
|
|
|
/*
|
|
* mask GPIO irq's
|
|
*/
|
|
static void inline mask_gpio_irq(u32 irq)
|
|
{
|
|
u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
|
|
u32 bit = IRQ_TO_BIT(irq);
|
|
CPU_REG (reg_base, GPIO_MASK) &= ~bit;
|
|
}
|
|
|
|
/*
|
|
* unmask GPIO irq's
|
|
*/
|
|
static void inline unmask_gpio_irq(u32 irq)
|
|
{
|
|
u32 reg_base = GPIO_VIRT(IRQ_TO_REGNO(irq));
|
|
u32 bit = IRQ_TO_BIT(irq);
|
|
CPU_REG (reg_base, GPIO_MASK) |= bit;
|
|
}
|
|
|
|
static void
|
|
h720x_gpio_handler(unsigned int mask, unsigned int irq,
|
|
struct irqdesc *desc, struct pt_regs *regs)
|
|
{
|
|
IRQDBG("%s irq: %d\n",__FUNCTION__,irq);
|
|
desc = irq_desc + irq;
|
|
while (mask) {
|
|
if (mask & 1) {
|
|
IRQDBG("handling irq %d\n", irq);
|
|
desc_handle_irq(irq, desc, regs);
|
|
}
|
|
irq++;
|
|
desc++;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
h720x_gpioa_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned int mask, irq;
|
|
|
|
mask = CPU_REG(GPIO_A_VIRT,GPIO_STAT);
|
|
irq = IRQ_CHAINED_GPIOA(0);
|
|
IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
|
|
h720x_gpio_handler(mask, irq, desc, regs);
|
|
}
|
|
|
|
static void
|
|
h720x_gpiob_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned int mask, irq;
|
|
mask = CPU_REG(GPIO_B_VIRT,GPIO_STAT);
|
|
irq = IRQ_CHAINED_GPIOB(0);
|
|
IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
|
|
h720x_gpio_handler(mask, irq, desc, regs);
|
|
}
|
|
|
|
static void
|
|
h720x_gpioc_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned int mask, irq;
|
|
|
|
mask = CPU_REG(GPIO_C_VIRT,GPIO_STAT);
|
|
irq = IRQ_CHAINED_GPIOC(0);
|
|
IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
|
|
h720x_gpio_handler(mask, irq, desc, regs);
|
|
}
|
|
|
|
static void
|
|
h720x_gpiod_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned int mask, irq;
|
|
|
|
mask = CPU_REG(GPIO_D_VIRT,GPIO_STAT);
|
|
irq = IRQ_CHAINED_GPIOD(0);
|
|
IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
|
|
h720x_gpio_handler(mask, irq, desc, regs);
|
|
}
|
|
|
|
#ifdef CONFIG_CPU_H7202
|
|
static void
|
|
h720x_gpioe_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned int mask, irq;
|
|
|
|
mask = CPU_REG(GPIO_E_VIRT,GPIO_STAT);
|
|
irq = IRQ_CHAINED_GPIOE(0);
|
|
IRQDBG("%s mask: 0x%08x irq: %d\n",__FUNCTION__,mask,irq);
|
|
h720x_gpio_handler(mask, irq, desc, regs);
|
|
}
|
|
#endif
|
|
|
|
static struct irqchip h720x_global_chip = {
|
|
.ack = mask_global_irq,
|
|
.mask = mask_global_irq,
|
|
.unmask = unmask_global_irq,
|
|
};
|
|
|
|
static struct irqchip h720x_gpio_chip = {
|
|
.ack = ack_gpio_irq,
|
|
.mask = mask_gpio_irq,
|
|
.unmask = unmask_gpio_irq,
|
|
};
|
|
|
|
/*
|
|
* Initialize IRQ's, mask all, enable multiplexed irq's
|
|
*/
|
|
void __init h720x_init_irq (void)
|
|
{
|
|
int irq;
|
|
|
|
/* Mask global irq's */
|
|
CPU_REG (IRQC_VIRT, IRQC_IER) = 0x0;
|
|
|
|
/* Mask all multiplexed irq's */
|
|
CPU_REG (GPIO_A_VIRT, GPIO_MASK) = 0x0;
|
|
CPU_REG (GPIO_B_VIRT, GPIO_MASK) = 0x0;
|
|
CPU_REG (GPIO_C_VIRT, GPIO_MASK) = 0x0;
|
|
CPU_REG (GPIO_D_VIRT, GPIO_MASK) = 0x0;
|
|
|
|
/* Initialize global IRQ's, fast path */
|
|
for (irq = 0; irq < NR_GLBL_IRQS; irq++) {
|
|
set_irq_chip(irq, &h720x_global_chip);
|
|
set_irq_handler(irq, do_level_IRQ);
|
|
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
|
|
}
|
|
|
|
/* Initialize multiplexed IRQ's, slow path */
|
|
for (irq = IRQ_CHAINED_GPIOA(0) ; irq <= IRQ_CHAINED_GPIOD(31); irq++) {
|
|
set_irq_chip(irq, &h720x_gpio_chip);
|
|
set_irq_handler(irq, do_edge_IRQ);
|
|
set_irq_flags(irq, IRQF_VALID );
|
|
}
|
|
set_irq_chained_handler(IRQ_GPIOA, h720x_gpioa_demux_handler);
|
|
set_irq_chained_handler(IRQ_GPIOB, h720x_gpiob_demux_handler);
|
|
set_irq_chained_handler(IRQ_GPIOC, h720x_gpioc_demux_handler);
|
|
set_irq_chained_handler(IRQ_GPIOD, h720x_gpiod_demux_handler);
|
|
|
|
#ifdef CONFIG_CPU_H7202
|
|
for (irq = IRQ_CHAINED_GPIOE(0) ; irq <= IRQ_CHAINED_GPIOE(31); irq++) {
|
|
set_irq_chip(irq, &h720x_gpio_chip);
|
|
set_irq_handler(irq, do_edge_IRQ);
|
|
set_irq_flags(irq, IRQF_VALID );
|
|
}
|
|
set_irq_chained_handler(IRQ_GPIOE, h720x_gpioe_demux_handler);
|
|
#endif
|
|
|
|
/* Enable multiplexed irq's */
|
|
CPU_REG (IRQC_VIRT, IRQC_IER) = IRQ_ENA_MUX;
|
|
}
|
|
|
|
static struct map_desc h720x_io_desc[] __initdata = {
|
|
{ IO_VIRT, IO_PHYS, IO_SIZE, MT_DEVICE },
|
|
};
|
|
|
|
/* Initialize io tables */
|
|
void __init h720x_map_io(void)
|
|
{
|
|
iotable_init(h720x_io_desc,ARRAY_SIZE(h720x_io_desc));
|
|
}
|
|
|