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/*
* arch/arm/mach-ns9xxx/board-a9m9750dev.c
*
* Copyright (C) 2006,2007 by Digi International Inc.
* All rights reserved.
*
* 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/irq.h>
#include <asm/mach/map.h>
#include <asm/gpio.h>
#include <asm/arch-ns9xxx/board.h>
#include <asm/arch-ns9xxx/regs-sys.h>
#include <asm/arch-ns9xxx/regs-mem.h>
#include <asm/arch-ns9xxx/regs-bbu.h>
#include <asm/arch-ns9xxx/regs-board-a9m9750dev.h>
#include "board-a9m9750dev.h"
static struct map_desc board_a9m9750dev_io_desc[] __initdata = {
{ /* FPGA on CS0 */
.virtual = io_p2v(NS9XXX_CSxSTAT_PHYS(0)),
.pfn = __phys_to_pfn(NS9XXX_CSxSTAT_PHYS(0)),
.length = NS9XXX_CS0STAT_LENGTH,
.type = MT_DEVICE,
},
};
void __init board_a9m9750dev_map_io(void)
{
iotable_init(board_a9m9750dev_io_desc,
ARRAY_SIZE(board_a9m9750dev_io_desc));
}
static void a9m9750dev_fpga_ack_irq(unsigned int irq)
{
/* nothing */
}
static void a9m9750dev_fpga_mask_irq(unsigned int irq)
{
u8 ier;
ier = __raw_readb(FPGA_IER);
ier &= ~(1 << (irq - FPGA_IRQ(0)));
__raw_writeb(ier, FPGA_IER);
}
static void a9m9750dev_fpga_maskack_irq(unsigned int irq)
{
a9m9750dev_fpga_mask_irq(irq);
a9m9750dev_fpga_ack_irq(irq);
}
static void a9m9750dev_fpga_unmask_irq(unsigned int irq)
{
u8 ier;
ier = __raw_readb(FPGA_IER);
ier |= 1 << (irq - FPGA_IRQ(0));
__raw_writeb(ier, FPGA_IER);
}
static struct irq_chip a9m9750dev_fpga_chip = {
.ack = a9m9750dev_fpga_ack_irq,
.mask = a9m9750dev_fpga_mask_irq,
.mask_ack = a9m9750dev_fpga_maskack_irq,
.unmask = a9m9750dev_fpga_unmask_irq,
};
static void a9m9750dev_fpga_demux_handler(unsigned int irq,
struct irq_desc *desc)
{
u8 stat = __raw_readb(FPGA_ISR);
desc->chip->mask_ack(irq);
while (stat != 0) {
int irqno = fls(stat) - 1;
struct irq_desc *fpgadesc;
stat &= ~(1 << irqno);
fpgadesc = irq_desc + FPGA_IRQ(irqno);
desc_handle_irq(FPGA_IRQ(irqno), fpgadesc);
}
desc->chip->unmask(irq);
}
void __init board_a9m9750dev_init_irq(void)
{
u32 eic;
int i;
if (gpio_request(11, "board a9m9750dev extirq2") == 0)
ns9xxx_gpio_configure(11, 0, 1);
else
printk(KERN_ERR "%s: cannot get gpio 11 for IRQ_EXT2\n",
__func__);
for (i = FPGA_IRQ(0); i <= FPGA_IRQ(7); ++i) {
set_irq_chip(i, &a9m9750dev_fpga_chip);
set_irq_handler(i, handle_level_irq);
set_irq_flags(i, IRQF_VALID);
}
/* IRQ_EXT2: level sensitive + active low */
eic = __raw_readl(SYS_EIC(2));
REGSET(eic, SYS_EIC, PLTY, AL);
REGSET(eic, SYS_EIC, LVEDG, LEVEL);
__raw_writel(eic, SYS_EIC(2));
set_irq_chained_handler(IRQ_EXT2,
a9m9750dev_fpga_demux_handler);
}
void __init board_a9m9750dev_init_machine(void)
{
u32 reg;
/* setup static CS0: memory base ... */
reg = __raw_readl(SYS_SMCSSMB(0));
REGSETIM(reg, SYS_SMCSSMB, CSxB, NS9XXX_CSxSTAT_PHYS(0) >> 12);
__raw_writel(reg, SYS_SMCSSMB(0));
/* ... and mask */
reg = __raw_readl(SYS_SMCSSMM(0));
REGSETIM(reg, SYS_SMCSSMM, CSxM, 0xfffff);
REGSET(reg, SYS_SMCSSMM, CSEx, EN);
__raw_writel(reg, SYS_SMCSSMM(0));
/* setup static CS0: memory configuration */
reg = __raw_readl(MEM_SMC(0));
REGSET(reg, MEM_SMC, PSMC, OFF);
REGSET(reg, MEM_SMC, BSMC, OFF);
REGSET(reg, MEM_SMC, EW, OFF);
REGSET(reg, MEM_SMC, PB, 1);
REGSET(reg, MEM_SMC, PC, AL);
REGSET(reg, MEM_SMC, PM, DIS);
REGSET(reg, MEM_SMC, MW, 8);
__raw_writel(reg, MEM_SMC(0));
/* setup static CS0: timing */
__raw_writel(0x2, MEM_SMWED(0));
__raw_writel(0x2, MEM_SMOED(0));
__raw_writel(0x6, MEM_SMRD(0));
__raw_writel(0x6, MEM_SMWD(0));
}
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