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/*
* Freescale STMP37XX/STMP378X SPI module pin multiplexing
*
* Author: dmitry pervushin <dimka@embeddedalley.com>
*
* Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <mach/stmp3xxx.h>
#include "common.h"
/*
These pins are:
SCK (SSPx_SCK)
MOSI (SSPx_CMD)
MISO (SSPx_DATA0)
SSn (SSPx_DATA3)
Please add new pins in the same order, thanks :)
*/
static struct pin_desc ssp_pins_desc[2][4] = {
[0] = {
{ PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0, },
{ PINID_SSP1_CMD, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
{ PINID_SSP1_DATA0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
{ PINID_SSP1_DATA3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
},
[1] = {
#if defined(CONFIG_ARCH_STMP37XX)
{ PINID_GPMI_IRQ, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
{ PINID_GPMI_RDY2, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_EMI_CE2N, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
#elif defined(CONFIG_ARCH_STMP378X)
{ PINID_GPMI_WRN, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
{ PINID_GPMI_RDY1, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_GPMI_D00, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
#endif
},
};
static struct pin_group ssp_pins[2] = {
[0] = {
.pins = ssp_pins_desc[0],
.nr_pins = ARRAY_SIZE(ssp_pins_desc[0]),
},
[1] = {
.pins = ssp_pins_desc[1],
.nr_pins = ARRAY_SIZE(ssp_pins_desc[1]),
},
};
int stmp37xx_spi_pins_request(char *id, int ssp)
{
return stmp3xxx_request_pin_group(&ssp_pins[ssp-1], id);
}
EXPORT_SYMBOL_GPL(stmp37xx_spi_pins_request);
void stmp37xx_spi_pins_release(char *id, int ssp)
{
stmp3xxx_release_pin_group(&ssp_pins[ssp-1], id);
}
EXPORT_SYMBOL_GPL(stmp37xx_spi_pins_release);
int stmp37xx_spi_enc_init(void *spi_dev)
{
struct spi_device *spi = spi_dev;
struct stmp37xx_spi_platform_data *data = spi->dev.platform_data;
gpio_request(data->irq_pin, spi->dev.bus_id);
gpio_direction_input(data->irq_pin);
stmp3xxx_configure_irq(data->irq_pin, IRQ_TYPE_EDGE_FALLING);
spi->irq = gpio_to_irq(data->irq_pin);
dev_dbg(&spi->dev, "Assigned IRQ %d(%s)\n", spi->irq, __func__);
return 0;
}
int stmp37xx_spi_enc_release(void *spi_dev)
{
struct spi_device *spi = spi_dev;
struct stmp37xx_spi_platform_data *data = spi->dev.platform_data;
stmp3xxx_configure_irq(data->irq_pin, IRQ_TYPE_NONE);
gpio_free(data->irq_pin);
return 0;
}
MODULE_AUTHOR("dmitry pervushin <dimka@embeddedalley.com>");
MODULE_LICENSE("GPL");
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