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/*
* arch/arm/mach-ep93xx/simone.c
* Simplemachines Sim.One support.
*
* Copyright (C) 2010 Ryan Mallon
*
* Based on the 2.6.24.7 support:
* Copyright (C) 2009 Simplemachines
* MMC support by Peter Ivanov <ivanovp@gmail.com>, 2007
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/mmc/host.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/platform_data/video-ep93xx.h>
#include <linux/platform_data/spi-ep93xx.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <mach/gpio-ep93xx.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include "soc.h"
static struct ep93xx_eth_data __initdata simone_eth_data = {
.phy_id = 1,
};
static struct ep93xxfb_mach_info __initdata simone_fb_info = {
.num_modes = EP93XXFB_USE_MODEDB,
.bpp = 16,
.flags = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
};
/*
* GPIO lines used for MMC card detection.
*/
#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0
/*
* Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
* low between multi-message command blocks. From v1.4, it uses a GPIO instead.
* v1.3 parts will still work, since the signal on SFRMOUT is automatic.
*/
#define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO1
/*
* MMC SPI chip select GPIO handling. If you are using SFRMOUT (SFRM1) signal,
* you can leave these empty and pass NULL as .controller_data.
*/
static int simone_mmc_spi_setup(struct spi_device *spi)
{
unsigned int gpio = MMC_CHIP_SELECT_GPIO;
int err;
err = gpio_request(gpio, spi->modalias);
if (err)
return err;
err = gpio_direction_output(gpio, 1);
if (err) {
gpio_free(gpio);
return err;
}
return 0;
}
static void simone_mmc_spi_cleanup(struct spi_device *spi)
{
unsigned int gpio = MMC_CHIP_SELECT_GPIO;
gpio_set_value(gpio, 1);
gpio_direction_input(gpio);
gpio_free(gpio);
}
static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
{
gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
}
static struct ep93xx_spi_chip_ops simone_mmc_spi_ops = {
.setup = simone_mmc_spi_setup,
.cleanup = simone_mmc_spi_cleanup,
.cs_control = simone_mmc_spi_cs_control,
};
/*
* MMC card detection GPIO setup.
*/
static int simone_mmc_spi_init(struct device *dev,
irqreturn_t (*irq_handler)(int, void *), void *mmc)
{
unsigned int gpio = MMC_CARD_DETECT_GPIO;
int irq, err;
err = gpio_request(gpio, dev_name(dev));
if (err)
return err;
err = gpio_direction_input(gpio);
if (err)
goto fail;
irq = gpio_to_irq(gpio);
if (irq < 0)
goto fail;
err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
"MMC card detect", mmc);
if (err)
goto fail;
printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
dev_name(dev), irq);
return 0;
fail:
gpio_free(gpio);
return err;
}
static void simone_mmc_spi_exit(struct device *dev, void *mmc)
{
unsigned int gpio = MMC_CARD_DETECT_GPIO;
free_irq(gpio_to_irq(gpio), mmc);
gpio_free(gpio);
}
static struct mmc_spi_platform_data simone_mmc_spi_data = {
.init = simone_mmc_spi_init,
.exit = simone_mmc_spi_exit,
.detect_delay = 500,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
};
static struct spi_board_info simone_spi_devices[] __initdata = {
{
.modalias = "mmc_spi",
.controller_data = &simone_mmc_spi_ops,
.platform_data = &simone_mmc_spi_data,
/*
* We use 10 MHz even though the maximum is 3.7 MHz. The driver
* will limit it automatically to max. frequency.
*/
.max_speed_hz = 10 * 1000 * 1000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_3,
},
};
static struct ep93xx_spi_info simone_spi_info __initdata = {
.num_chipselect = ARRAY_SIZE(simone_spi_devices),
.use_dma = 1,
};
static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
.sda_pin = EP93XX_GPIO_LINE_EEDAT,
.sda_is_open_drain = 0,
.scl_pin = EP93XX_GPIO_LINE_EECLK,
.scl_is_open_drain = 0,
.udelay = 0,
.timeout = 0,
};
static struct i2c_board_info __initdata simone_i2c_board_info[] = {
{
I2C_BOARD_INFO("ds1337", 0x68),
},
};
static struct platform_device simone_audio_device = {
.name = "simone-audio",
.id = -1,
};
static void __init simone_register_audio(void)
{
ep93xx_register_ac97();
platform_device_register(&simone_audio_device);
}
static void __init simone_init_machine(void)
{
ep93xx_init_devices();
ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
ep93xx_register_eth(&simone_eth_data, 1);
ep93xx_register_fb(&simone_fb_info);
ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
ARRAY_SIZE(simone_i2c_board_info));
ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
ARRAY_SIZE(simone_spi_devices));
simone_register_audio();
}
MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
/* Maintainer: Ryan Mallon */
.atag_offset = 0x100,
.map_io = ep93xx_map_io,
.init_irq = ep93xx_init_irq,
.init_time = ep93xx_timer_init,
.init_machine = simone_init_machine,
.init_late = ep93xx_init_late,
.restart = ep93xx_restart,
MACHINE_END
|
