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