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/*
* linux/arch/arm/mach-h720x/cpu-h7202.c
*
* Copyright (C) 2003 Thomas Gleixner <tglx@linutronix.de>
* 2003 Robert Schwebel <r.schwebel@pengutronix.de>
* 2004 Sascha Hauer <s.hauer@pengutronix.de>
*
* processor specific stuff for the Hynix h7202
*
* 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/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/types.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/irqs.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <linux/device.h>
#include <linux/serial_8250.h>
#include "common.h"
static struct resource h7202ps2_resources[] = {
[0] = {
.start = 0x8002c000,
.end = 0x8002c040,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PS2,
.end = IRQ_PS2,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device h7202ps2_device = {
.name = "h7202ps2",
.id = -1,
.num_resources = ARRAY_SIZE(h7202ps2_resources),
.resource = h7202ps2_resources,
};
static struct plat_serial8250_port serial_platform_data[] = {
{
.membase = (void*)SERIAL0_VIRT,
.mapbase = SERIAL0_BASE,
.irq = IRQ_UART0,
.uartclk = 2*1843200,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
{
.membase = (void*)SERIAL1_VIRT,
.mapbase = SERIAL1_BASE,
.irq = IRQ_UART1,
.uartclk = 2*1843200,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
#ifdef CONFIG_H7202_SERIAL23
{
.membase = (void*)SERIAL2_VIRT,
.mapbase = SERIAL2_BASE,
.irq = IRQ_UART2,
.uartclk = 2*1843200,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
{
.membase = (void*)SERIAL3_VIRT,
.mapbase = SERIAL3_BASE,
.irq = IRQ_UART3,
.uartclk = 2*1843200,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
#endif
{ },
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = serial_platform_data,
},
};
static struct platform_device *devices[] __initdata = {
&h7202ps2_device,
&serial_device,
};
/* Although we have two interrupt lines for the timers, we only have one
* status register which clears all pending timer interrupts on reading. So
* we have to handle all timer interrupts in one place.
*/
static void
h7202_timerx_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
struct pt_regs *regs)
{
unsigned int mask, irq;
mask = CPU_REG (TIMER_VIRT, TIMER_TOPSTAT);
if ( mask & TSTAT_T0INT ) {
write_seqlock(&xtime_lock);
timer_tick(regs);
write_sequnlock(&xtime_lock);
if( mask == TSTAT_T0INT )
return;
}
mask >>= 1;
irq = IRQ_TIMER1;
desc = irq_desc + irq;
while (mask) {
if (mask & 1)
desc_handle_irq(irq, desc, regs);
irq++;
desc++;
mask >>= 1;
}
}
/*
* Timer interrupt handler
*/
static irqreturn_t
h7202_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
h7202_timerx_demux_handler(0, NULL, regs);
return IRQ_HANDLED;
}
/*
* mask multiplexed timer irq's
*/
static void inline mask_timerx_irq (u32 irq)
{
unsigned int bit;
bit = 2 << ((irq == IRQ_TIMER64B) ? 4 : (irq - IRQ_TIMER1));
CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) &= ~bit;
}
/*
* unmask multiplexed timer irq's
*/
static void inline unmask_timerx_irq (u32 irq)
{
unsigned int bit;
bit = 2 << ((irq == IRQ_TIMER64B) ? 4 : (irq - IRQ_TIMER1));
CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) |= bit;
}
static struct irqchip h7202_timerx_chip = {
.ack = mask_timerx_irq,
.mask = mask_timerx_irq,
.unmask = unmask_timerx_irq,
};
static struct irqaction h7202_timer_irq = {
.name = "h7202 Timer Tick",
.flags = SA_INTERRUPT | SA_TIMER,
.handler = h7202_timer_interrupt,
};
/*
* Setup TIMER0 as system timer
*/
void __init h7202_init_time(void)
{
CPU_REG (TIMER_VIRT, TM0_PERIOD) = LATCH;
CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_RESET;
CPU_REG (TIMER_VIRT, TM0_CTRL) = TM_REPEAT | TM_START;
CPU_REG (TIMER_VIRT, TIMER_TOPCTRL) = ENABLE_TM0_INTR | TIMER_ENABLE_BIT;
setup_irq(IRQ_TIMER0, &h7202_timer_irq);
}
struct sys_timer h7202_timer = {
.init = h7202_init_time,
.offset = h720x_gettimeoffset,
};
void __init h7202_init_irq (void)
{
int irq;
CPU_REG (GPIO_E_VIRT, GPIO_MASK) = 0x0;
for (irq = IRQ_TIMER1;
irq < IRQ_CHAINED_TIMERX(NR_TIMERX_IRQS); irq++) {
mask_timerx_irq(irq);
set_irq_chip(irq, &h7202_timerx_chip);
set_irq_handler(irq, do_edge_IRQ);
set_irq_flags(irq, IRQF_VALID );
}
set_irq_chained_handler(IRQ_TIMERX, h7202_timerx_demux_handler);
h720x_init_irq();
}
void __init init_hw_h7202(void)
{
/* Enable clocks */
CPU_REG (PMU_BASE, PMU_PLL_CTRL) |= PLL_2_EN | PLL_1_EN | PLL_3_MUTE;
CPU_REG (SERIAL0_VIRT, SERIAL_ENABLE) = SERIAL_ENABLE_EN;
CPU_REG (SERIAL1_VIRT, SERIAL_ENABLE) = SERIAL_ENABLE_EN;
#ifdef CONFIG_H7202_SERIAL23
CPU_REG (SERIAL2_VIRT, SERIAL_ENABLE) = SERIAL_ENABLE_EN;
CPU_REG (SERIAL3_VIRT, SERIAL_ENABLE) = SERIAL_ENABLE_EN;
CPU_IO (GPIO_AMULSEL) = AMULSEL_USIN2 | AMULSEL_USOUT2 |
AMULSEL_USIN3 | AMULSEL_USOUT3;
#endif
(void) platform_add_devices(devices, ARRAY_SIZE(devices));
}
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