mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
fea3158c55
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Rob Herring <rob.herring@calxeda.com>
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/*
|
|
* Setup code for AT91SAM Evaluation Kits with Device Tree support
|
|
*
|
|
* Covers: * AT91SAM9G45-EKES board
|
|
* * AT91SAM9M10-EKES board
|
|
* * AT91SAM9M10G45-EK board
|
|
*
|
|
* Copyright (C) 2011 Atmel,
|
|
* 2011 Nicolas Ferre <nicolas.ferre@atmel.com>
|
|
*
|
|
* Licensed under GPLv2 or later.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/board.h>
|
|
#include <mach/system_rev.h>
|
|
#include <mach/at91sam9_smc.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include "sam9_smc.h"
|
|
#include "generic.h"
|
|
|
|
|
|
static void __init ek_init_early(void)
|
|
{
|
|
/* Initialize processor: 12.000 MHz crystal */
|
|
at91_initialize(12000000);
|
|
|
|
/* DGBU on ttyS0. (Rx & Tx only) */
|
|
at91_register_uart(0, 0, 0);
|
|
|
|
/* set serial console to ttyS0 (ie, DBGU) */
|
|
at91_set_serial_console(0);
|
|
}
|
|
|
|
/* det_pin is not connected */
|
|
static struct atmel_nand_data __initdata ek_nand_data = {
|
|
.ale = 21,
|
|
.cle = 22,
|
|
.rdy_pin = AT91_PIN_PC8,
|
|
.enable_pin = AT91_PIN_PC14,
|
|
};
|
|
|
|
static struct sam9_smc_config __initdata ek_nand_smc_config = {
|
|
.ncs_read_setup = 0,
|
|
.nrd_setup = 2,
|
|
.ncs_write_setup = 0,
|
|
.nwe_setup = 2,
|
|
|
|
.ncs_read_pulse = 4,
|
|
.nrd_pulse = 4,
|
|
.ncs_write_pulse = 4,
|
|
.nwe_pulse = 4,
|
|
|
|
.read_cycle = 7,
|
|
.write_cycle = 7,
|
|
|
|
.mode = AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE,
|
|
.tdf_cycles = 3,
|
|
};
|
|
|
|
static void __init ek_add_device_nand(void)
|
|
{
|
|
ek_nand_data.bus_width_16 = board_have_nand_16bit();
|
|
/* setup bus-width (8 or 16) */
|
|
if (ek_nand_data.bus_width_16)
|
|
ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
|
|
else
|
|
ek_nand_smc_config.mode |= AT91_SMC_DBW_8;
|
|
|
|
/* configure chip-select 3 (NAND) */
|
|
sam9_smc_configure(3, &ek_nand_smc_config);
|
|
|
|
at91_add_device_nand(&ek_nand_data);
|
|
}
|
|
|
|
static const struct of_device_id aic_of_match[] __initconst = {
|
|
{ .compatible = "atmel,at91rm9200-aic", },
|
|
{},
|
|
};
|
|
|
|
static void __init at91_dt_init_irq(void)
|
|
{
|
|
irq_domain_generate_simple(aic_of_match, 0xfffff000, 0);
|
|
at91_init_irq_default();
|
|
}
|
|
|
|
static void __init at91_dt_device_init(void)
|
|
{
|
|
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
|
|
|
|
/* NAND */
|
|
ek_add_device_nand();
|
|
}
|
|
|
|
static const char *at91_dt_board_compat[] __initdata = {
|
|
"atmel,at91sam9m10g45ek",
|
|
"calao,usb-a9g20",
|
|
NULL
|
|
};
|
|
|
|
DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM (Device Tree)")
|
|
/* Maintainer: Atmel */
|
|
.timer = &at91sam926x_timer,
|
|
.map_io = at91_map_io,
|
|
.init_early = ek_init_early,
|
|
.init_irq = at91_dt_init_irq,
|
|
.init_machine = at91_dt_device_init,
|
|
.dt_compat = at91_dt_board_compat,
|
|
MACHINE_END
|