linux/arch/arm/mach-h720x/common.c
Linus Torvalds 0cd61b68c3 Initial blind fixup for arm for irq changes
Untested, but this should fix up the bulk of the totally mechanical
issues, and should make the actual detail fixing easier.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-06 10:59:54 -07:00

248 lines
5.7 KiB
C

/*
* 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)
{
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);
}
irq++;
desc++;
mask >>= 1;
}
}
static void
h720x_gpioa_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
{
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);
}
static void
h720x_gpiob_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
{
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);
}
static void
h720x_gpioc_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
{
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);
}
static void
h720x_gpiod_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
{
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);
}
#ifdef CONFIG_CPU_H7202
static void
h720x_gpioe_demux_handler(unsigned int irq_unused, struct irqdesc *desc)
{
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);
}
#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 = {
{
.virtual = IO_VIRT,
.pfn = __phys_to_pfn(IO_PHYS),
.length = IO_SIZE,
.type = MT_DEVICE
},
};
/* Initialize io tables */
void __init h720x_map_io(void)
{
iotable_init(h720x_io_desc,ARRAY_SIZE(h720x_io_desc));
}