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