sam9_smc.c
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/*
* linux/arch/arm/mach-at91/sam9_smc.c
*
* Copyright (C) 2008 Andrew Victor
*
* 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/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <mach/at91sam9_smc.h>
#include "sam9_smc.h"
#define AT91_SMC_CS(id, n) (smc_base_addr[id] + ((n) * 0x10))
static void __iomem *smc_base_addr[2];
static void __init sam9_smc_cs_configure(void __iomem *base, struct sam9_smc_config* config)
{
/* Setup register */
__raw_writel(AT91_SMC_NWESETUP_(config->nwe_setup)
| AT91_SMC_NCS_WRSETUP_(config->ncs_write_setup)
| AT91_SMC_NRDSETUP_(config->nrd_setup)
| AT91_SMC_NCS_RDSETUP_(config->ncs_read_setup),
base + AT91_SMC_SETUP);
/* Pulse register */
__raw_writel(AT91_SMC_NWEPULSE_(config->nwe_pulse)
| AT91_SMC_NCS_WRPULSE_(config->ncs_write_pulse)
| AT91_SMC_NRDPULSE_(config->nrd_pulse)
| AT91_SMC_NCS_RDPULSE_(config->ncs_read_pulse),
base + AT91_SMC_PULSE);
/* Cycle register */
__raw_writel(AT91_SMC_NWECYCLE_(config->write_cycle)
| AT91_SMC_NRDCYCLE_(config->read_cycle),
base + AT91_SMC_CYCLE);
/* Mode register */
__raw_writel(config->mode
| AT91_SMC_TDF_(config->tdf_cycles),
base + AT91_SMC_MODE);
}
void __init sam9_smc_configure(int id, int cs, struct sam9_smc_config* config)
{
sam9_smc_cs_configure(AT91_SMC_CS(id, cs), config);
}
void __init at91sam9_ioremap_smc(int id, u32 addr)
{
if (id > 1) {
pr_warn("%s: id > 2\n", __func__);
return;
}
smc_base_addr[id] = ioremap(addr, 512);
if (!smc_base_addr[id])
pr_warn("Impossible to ioremap smc.%d 0x%x\n", id, addr);
}