/*
* 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/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/irq.h>
#include <asm/mach/map.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)
{
FPGA_IER &= ~(1 << (irq - FPGA_IRQ(0)));
}
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)
{
FPGA_IER |= 1 << (irq - FPGA_IRQ(0));
}
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)
{
int stat = FPGA_ISR;
while (stat != 0) {
int irqno = fls(stat) - 1;
stat &= ~(1 << irqno);
desc = irq_desc + FPGA_IRQ(irqno);
desc_handle_irq(FPGA_IRQ(irqno), desc);
}
}
void __init board_a9m9750dev_init_irq(void)
{
u32 reg;
int i;
/*
* configure gpio for IRQ_EXT2
* use GPIO 11, because GPIO 32 is used for the LCD
*/
/* XXX: proper GPIO handling */
BBU_GC(2) &= ~0x2000;
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 */
reg = SYS_EIC(2);
REGSET(reg, SYS_EIC, PLTY, AL);
REGSET(reg, SYS_EIC, LVEDG, LEVEL);
SYS_EIC(2) = reg;
set_irq_chained_handler(IRQ_EXT2,
a9m9750dev_fpga_demux_handler);
}
static struct plat_serial8250_port board_a9m9750dev_serial8250_port[] = {
{
.iobase = FPGA_UARTA_BASE,
.membase = (unsigned char*)FPGA_UARTA_BASE,
.mapbase = FPGA_UARTA_BASE,
.irq = IRQ_FPGA_UARTA,
.iotype = UPIO_MEM,
.uartclk = 18432000,
.regshift = 0,
.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ,
}, {
.iobase = FPGA_UARTB_BASE,
.membase = (unsigned char*)FPGA_UARTB_BASE,
.mapbase = FPGA_UARTB_BASE,
.irq = IRQ_FPGA_UARTB,
.iotype = UPIO_MEM,
.uartclk = 18432000,
.regshift = 0,
.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ,
}, {
.iobase = FPGA_UARTC_BASE,
.membase = (unsigned char*)FPGA_UARTC_BASE,
.mapbase = FPGA_UARTC_BASE,
.irq = IRQ_FPGA_UARTC,
.iotype = UPIO_MEM,
.uartclk = 18432000,
.regshift = 0,
.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ,
}, {
.iobase = FPGA_UARTD_BASE,
.membase = (unsigned char*)FPGA_UARTD_BASE,
.mapbase = FPGA_UARTD_BASE,
.irq = IRQ_FPGA_UARTD,
.iotype = UPIO_MEM,
.uartclk = 18432000,
.regshift = 0,
.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ,
}, {
/* end marker */
},
};
static struct platform_device board_a9m9750dev_serial_device = {
.name = "serial8250",
.dev = {
.platform_data = board_a9m9750dev_serial8250_port,
},
};
static struct platform_device *board_a9m9750dev_devices[] __initdata = {
&board_a9m9750dev_serial_device,
};
void __init board_a9m9750dev_init_machine(void)
{
u32 reg;
/* setup static CS0: memory base ... */
REGSETIM(SYS_SMCSSMB(0), SYS_SMCSSMB, CSxB,
NS9XXX_CSxSTAT_PHYS(0) >> 12);
/* ... and mask */
reg = SYS_SMCSSMM(0);
REGSETIM(reg, SYS_SMCSSMM, CSxM, 0xfffff);
REGSET(reg, SYS_SMCSSMM, CSEx, EN);
SYS_SMCSSMM(0) = reg;
/* setup static CS0: memory configuration */
reg = 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);
MEM_SMC(0) = reg;
/* setup static CS0: timing */
MEM_SMWED(0) = 0x2;
MEM_SMOED(0) = 0x2;
MEM_SMRD(0) = 0x6;
MEM_SMWD(0) = 0x6;
platform_add_devices(board_a9m9750dev_devices,
ARRAY_SIZE(board_a9m9750dev_devices));
}
