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