396 lines
8.1 KiB
C
396 lines
8.1 KiB
C
/*
|
|
* linux/arch/arm/mach-clps7500/core.c
|
|
*
|
|
* Copyright (C) 1998 Russell King
|
|
* Copyright (C) 1999 Nexus Electronics Ltd
|
|
*
|
|
* Extra MM routines for CL7500 architecture
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/list.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/serial_8250.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/mach/time.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/hardware/iomd.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
unsigned int vram_size;
|
|
|
|
static void cl7500_ack_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
|
|
iomd_writeb(mask, IOMD_IRQCLRA);
|
|
}
|
|
|
|
static void cl7500_mask_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKA);
|
|
}
|
|
|
|
static struct irq_chip clps7500_a_chip = {
|
|
.ack = cl7500_ack_irq_a,
|
|
.mask = cl7500_mask_irq_a,
|
|
.unmask = cl7500_unmask_irq_a,
|
|
};
|
|
|
|
static void cl7500_mask_irq_b(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKB);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKB);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_b(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKB);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKB);
|
|
}
|
|
|
|
static struct irq_chip clps7500_b_chip = {
|
|
.ack = cl7500_mask_irq_b,
|
|
.mask = cl7500_mask_irq_b,
|
|
.unmask = cl7500_unmask_irq_b,
|
|
};
|
|
|
|
static void cl7500_mask_irq_c(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKC);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKC);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_c(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKC);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKC);
|
|
}
|
|
|
|
static struct irq_chip clps7500_c_chip = {
|
|
.ack = cl7500_mask_irq_c,
|
|
.mask = cl7500_mask_irq_c,
|
|
.unmask = cl7500_unmask_irq_c,
|
|
};
|
|
|
|
static void cl7500_mask_irq_d(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKD);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKD);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_d(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKD);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKD);
|
|
}
|
|
|
|
static struct irq_chip clps7500_d_chip = {
|
|
.ack = cl7500_mask_irq_d,
|
|
.mask = cl7500_mask_irq_d,
|
|
.unmask = cl7500_unmask_irq_d,
|
|
};
|
|
|
|
static void cl7500_mask_irq_dma(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_DMAMASK);
|
|
iomd_writeb(val & ~mask, IOMD_DMAMASK);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_dma(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_DMAMASK);
|
|
iomd_writeb(val | mask, IOMD_DMAMASK);
|
|
}
|
|
|
|
static struct irq_chip clps7500_dma_chip = {
|
|
.ack = cl7500_mask_irq_dma,
|
|
.mask = cl7500_mask_irq_dma,
|
|
.unmask = cl7500_unmask_irq_dma,
|
|
};
|
|
|
|
static void cl7500_mask_irq_fiq(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_FIQMASK);
|
|
iomd_writeb(val & ~mask, IOMD_FIQMASK);
|
|
}
|
|
|
|
static void cl7500_unmask_irq_fiq(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_FIQMASK);
|
|
iomd_writeb(val | mask, IOMD_FIQMASK);
|
|
}
|
|
|
|
static struct irq_chip clps7500_fiq_chip = {
|
|
.ack = cl7500_mask_irq_fiq,
|
|
.mask = cl7500_mask_irq_fiq,
|
|
.unmask = cl7500_unmask_irq_fiq,
|
|
};
|
|
|
|
static void cl7500_no_action(unsigned int irq)
|
|
{
|
|
}
|
|
|
|
static struct irq_chip clps7500_no_chip = {
|
|
.ack = cl7500_no_action,
|
|
.mask = cl7500_no_action,
|
|
.unmask = cl7500_no_action,
|
|
};
|
|
|
|
static struct irqaction irq_isa = {
|
|
.handler = no_action,
|
|
.mask = CPU_MASK_NONE,
|
|
.name = "isa",
|
|
};
|
|
|
|
static void __init clps7500_init_irq(void)
|
|
{
|
|
unsigned int irq, flags;
|
|
|
|
iomd_writeb(0, IOMD_IRQMASKA);
|
|
iomd_writeb(0, IOMD_IRQMASKB);
|
|
iomd_writeb(0, IOMD_FIQMASK);
|
|
iomd_writeb(0, IOMD_DMAMASK);
|
|
|
|
for (irq = 0; irq < NR_IRQS; irq++) {
|
|
flags = IRQF_VALID;
|
|
|
|
if (irq <= 6 || (irq >= 9 && irq <= 15) ||
|
|
(irq >= 48 && irq <= 55))
|
|
flags |= IRQF_PROBE;
|
|
|
|
switch (irq) {
|
|
case 0 ... 7:
|
|
set_irq_chip(irq, &clps7500_a_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 8 ... 15:
|
|
set_irq_chip(irq, &clps7500_b_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 16 ... 22:
|
|
set_irq_chip(irq, &clps7500_dma_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 24 ... 31:
|
|
set_irq_chip(irq, &clps7500_c_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 40 ... 47:
|
|
set_irq_chip(irq, &clps7500_d_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 48 ... 55:
|
|
set_irq_chip(irq, &clps7500_no_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 64 ... 72:
|
|
set_irq_chip(irq, &clps7500_fiq_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
}
|
|
}
|
|
|
|
setup_irq(IRQ_ISA, &irq_isa);
|
|
}
|
|
|
|
static struct map_desc cl7500_io_desc[] __initdata = {
|
|
{ /* IO space */
|
|
.virtual = (unsigned long)IO_BASE,
|
|
.pfn = __phys_to_pfn(IO_START),
|
|
.length = IO_SIZE,
|
|
.type = MT_DEVICE
|
|
}, { /* ISA space */
|
|
.virtual = ISA_BASE,
|
|
.pfn = __phys_to_pfn(ISA_START),
|
|
.length = ISA_SIZE,
|
|
.type = MT_DEVICE
|
|
}, { /* Flash */
|
|
.virtual = FLASH_BASE,
|
|
.pfn = __phys_to_pfn(FLASH_START),
|
|
.length = FLASH_SIZE,
|
|
.type = MT_DEVICE
|
|
}, { /* LED */
|
|
.virtual = LED_BASE,
|
|
.pfn = __phys_to_pfn(LED_START),
|
|
.length = LED_SIZE,
|
|
.type = MT_DEVICE
|
|
}
|
|
};
|
|
|
|
static void __init clps7500_map_io(void)
|
|
{
|
|
iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc));
|
|
}
|
|
|
|
extern void ioctime_init(void);
|
|
extern unsigned long ioc_timer_gettimeoffset(void);
|
|
|
|
static irqreturn_t
|
|
clps7500_timer_interrupt(int irq, void *dev_id)
|
|
{
|
|
timer_tick();
|
|
|
|
/* Why not using do_leds interface?? */
|
|
{
|
|
/* Twinkle the lights. */
|
|
static int count, state = 0xff00;
|
|
if (count-- == 0) {
|
|
state ^= 0x100;
|
|
count = 25;
|
|
*((volatile unsigned int *)LED_ADDRESS) = state;
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction clps7500_timer_irq = {
|
|
.name = "CLPS7500 Timer Tick",
|
|
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
|
|
.handler = clps7500_timer_interrupt,
|
|
};
|
|
|
|
/*
|
|
* Set up timer interrupt.
|
|
*/
|
|
static void __init clps7500_timer_init(void)
|
|
{
|
|
ioctime_init();
|
|
setup_irq(IRQ_TIMER, &clps7500_timer_irq);
|
|
}
|
|
|
|
static struct sys_timer clps7500_timer = {
|
|
.init = clps7500_timer_init,
|
|
.offset = ioc_timer_gettimeoffset,
|
|
};
|
|
|
|
static struct plat_serial8250_port serial_platform_data[] = {
|
|
{
|
|
.mapbase = 0x03010fe0,
|
|
.irq = 10,
|
|
.uartclk = 1843200,
|
|
.regshift = 2,
|
|
.iotype = UPIO_MEM,
|
|
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
|
|
},
|
|
{
|
|
.mapbase = 0x03010be0,
|
|
.irq = 0,
|
|
.uartclk = 1843200,
|
|
.regshift = 2,
|
|
.iotype = UPIO_MEM,
|
|
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
|
|
},
|
|
{
|
|
.iobase = ISASLOT_IO + 0x2e8,
|
|
.irq = 41,
|
|
.uartclk = 1843200,
|
|
.regshift = 0,
|
|
.iotype = UPIO_PORT,
|
|
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
|
|
},
|
|
{
|
|
.iobase = ISASLOT_IO + 0x3e8,
|
|
.irq = 40,
|
|
.uartclk = 1843200,
|
|
.regshift = 0,
|
|
.iotype = UPIO_PORT,
|
|
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
|
|
},
|
|
{ },
|
|
};
|
|
|
|
static struct platform_device serial_device = {
|
|
.name = "serial8250",
|
|
.id = PLAT8250_DEV_PLATFORM,
|
|
.dev = {
|
|
.platform_data = serial_platform_data,
|
|
},
|
|
};
|
|
|
|
static void __init clps7500_init(void)
|
|
{
|
|
platform_device_register(&serial_device);
|
|
}
|
|
|
|
MACHINE_START(CLPS7500, "CL-PS7500")
|
|
/* Maintainer: Philip Blundell */
|
|
.phys_io = 0x03000000,
|
|
.io_pg_offst = ((0xe0000000) >> 18) & 0xfffc,
|
|
.map_io = clps7500_map_io,
|
|
.init_irq = clps7500_init_irq,
|
|
.init_machine = clps7500_init,
|
|
.timer = &clps7500_timer,
|
|
MACHINE_END
|
|
|