arch/arm/mach-ep93xx/simone.c

   1 /*
   2  * arch/arm/mach-ep93xx/simone.c
   3  * Simplemachines Sim.One support.
   4  *
   5  * Copyright (C) 2010 Ryan Mallon
   6  *
   7  * Based on the 2.6.24.7 support:
   8  *   Copyright (C) 2009 Simplemachines
   9  *   MMC support by Peter Ivanov <ivanovp@gmail.com>, 2007
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/i2c.h>
  22 #include <linux/i2c-gpio.h>
  23 #include <linux/mmc/host.h>
  24 #include <linux/spi/spi.h>
  25 #include <linux/spi/mmc_spi.h>
  26 #include <linux/platform_data/video-ep93xx.h>
  27 #include <linux/platform_data/spi-ep93xx.h>
  28 #include <linux/gpio.h>
  29
  30 #include <mach/hardware.h>
  31 #include <mach/gpio-ep93xx.h>
  32
  33 #include <asm/mach-types.h>
  34 #include <asm/mach/arch.h>
  35
  36 #include "soc.h"
  37
  38 static struct ep93xx_eth_data __initdata simone_eth_data = {
  39         .phy_id         = 1,
  40 };
  41
  42 static struct ep93xxfb_mach_info __initdata simone_fb_info = {
  43         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
  44 };
  45
  46 /*
  47  * GPIO lines used for MMC card detection.
  48  */
  49 #define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0
  50
  51 /*
  52  * MMC card detection GPIO setup.
  53  */
  54
  55 static int simone_mmc_spi_init(struct device *dev,
  56         irqreturn_t (*irq_handler)(int, void *), void *mmc)
  57 {
  58         unsigned int gpio = MMC_CARD_DETECT_GPIO;
  59         int irq, err;
  60
  61         err = gpio_request(gpio, dev_name(dev));
  62         if (err)
  63                 return err;
  64
  65         err = gpio_direction_input(gpio);
  66         if (err)
  67                 goto fail;
  68
  69         irq = gpio_to_irq(gpio);
  70         if (irq < 0)
  71                 goto fail;
  72
  73         err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
  74                           "MMC card detect", mmc);
  75         if (err)
  76                 goto fail;
  77
  78         printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
  79                dev_name(dev), irq);
  80
  81         return 0;
  82 fail:
  83         gpio_free(gpio);
  84         return err;
  85 }
  86
  87 static void simone_mmc_spi_exit(struct device *dev, void *mmc)
  88 {
  89         unsigned int gpio = MMC_CARD_DETECT_GPIO;
  90
  91         free_irq(gpio_to_irq(gpio), mmc);
  92         gpio_free(gpio);
  93 }
  94
  95 static struct mmc_spi_platform_data simone_mmc_spi_data = {
  96         .init           = simone_mmc_spi_init,
  97         .exit           = simone_mmc_spi_exit,
  98         .detect_delay   = 500,
  99         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 100 };
 101
 102 static struct spi_board_info simone_spi_devices[] __initdata = {
 103         {
 104                 .modalias               = "mmc_spi",
 105                 .platform_data          = &simone_mmc_spi_data,
 106                 /*
 107                  * We use 10 MHz even though the maximum is 3.7 MHz. The driver
 108                  * will limit it automatically to max. frequency.
 109                  */
 110                 .max_speed_hz           = 10 * 1000 * 1000,
 111                 .bus_num                = 0,
 112                 .chip_select            = 0,
 113                 .mode                   = SPI_MODE_3,
 114         },
 115 };
 116
 117 /*
 118  * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
 119  * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
 120  * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
 121  */
 122 static int simone_spi_chipselects[] __initdata = {
 123         EP93XX_GPIO_LINE_EGPIO1,
 124 };
 125
 126 static struct ep93xx_spi_info simone_spi_info __initdata = {
 127         .chipselect     = simone_spi_chipselects,
 128         .num_chipselect = ARRAY_SIZE(simone_spi_chipselects),
 129         .use_dma = 1,
 130 };
 131
 132 static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
 133         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 134         .sda_is_open_drain      = 0,
 135         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 136         .scl_is_open_drain      = 0,
 137         .udelay                 = 0,
 138         .timeout                = 0,
 139 };
 140
 141 static struct i2c_board_info __initdata simone_i2c_board_info[] = {
 142         {
 143                 I2C_BOARD_INFO("ds1337", 0x68),
 144         },
 145 };
 146
 147 static struct platform_device simone_audio_device = {
 148         .name           = "simone-audio",
 149         .id             = -1,
 150 };
 151
 152 static void __init simone_register_audio(void)
 153 {
 154         ep93xx_register_ac97();
 155         platform_device_register(&simone_audio_device);
 156 }
 157
 158 static void __init simone_init_machine(void)
 159 {
 160         ep93xx_init_devices();
 161         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
 162         ep93xx_register_eth(&simone_eth_data, 1);
 163         ep93xx_register_fb(&simone_fb_info);
 164         ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
 165                             ARRAY_SIZE(simone_i2c_board_info));
 166         ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
 167                             ARRAY_SIZE(simone_spi_devices));
 168         simone_register_audio();
 169 }
 170
 171 MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
 172         /* Maintainer: Ryan Mallon */
 173         .atag_offset    = 0x100,
 174         .map_io         = ep93xx_map_io,
 175         .init_irq       = ep93xx_init_irq,
 176         .init_time      = ep93xx_timer_init,
 177         .init_machine   = simone_init_machine,
 178         .init_late      = ep93xx_init_late,
 179         .restart        = ep93xx_restart,
 180 MACHINE_END