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/*
* Copyright (C) 2010
* Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_spi.h>
#include <asm/arch/gpio.h>
#include <spi.h>
static const struct {
u32 port;
u32 bit;
} cs_to_portbit[2][4] = {
{{AT91_PIO_PORTA, 3}, {AT91_PIO_PORTC, 11},
{AT91_PIO_PORTC, 16}, {AT91_PIO_PORTC, 17} },
{{AT91_PIO_PORTB, 3}, {AT91_PIO_PORTC, 5},
{AT91_PIO_PORTC, 4}, {AT91_PIO_PORTC, 3} }
};
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
debug("spi_cs_is_valid: bus=%u cs=%u\n", bus, cs);
if (bus < 2 && cs < 4)
return 1;
return 0;
}
void spi_cs_activate(struct spi_slave *slave)
{
debug("spi_cs_activate: bus=%u cs=%u\n", slave->bus, slave->cs);
at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
cs_to_portbit[slave->bus][slave->cs].bit, 0);
}
void spi_cs_deactivate(struct spi_slave *slave)
{
debug("spi_cs_deactivate: bus=%u cs=%u\n", slave->bus, slave->cs);
at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
cs_to_portbit[slave->bus][slave->cs].bit, 1);
}
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