linux/arch/arm/mach-ep93xx/simone.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * arch/arm/mach-ep93xx/simone.c
   4 * Simplemachines Sim.One support.
   5 *
   6 * Copyright (C) 2010 Ryan Mallon
   7 *
   8 * Based on the 2.6.24.7 support:
   9 *   Copyright (C) 2009 Simplemachines
  10 *   MMC support by Peter Ivanov <ivanovp@gmail.com>, 2007
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/platform_device.h>
  16#include <linux/i2c.h>
  17#include <linux/mmc/host.h>
  18#include <linux/spi/spi.h>
  19#include <linux/spi/mmc_spi.h>
  20#include <linux/platform_data/video-ep93xx.h>
  21#include <linux/platform_data/spi-ep93xx.h>
  22#include <linux/gpio.h>
  23#include <linux/gpio/machine.h>
  24
  25#include "hardware.h"
  26#include "gpio-ep93xx.h"
  27
  28#include <asm/mach-types.h>
  29#include <asm/mach/arch.h>
  30
  31#include "soc.h"
  32
  33static struct ep93xx_eth_data __initdata simone_eth_data = {
  34        .phy_id         = 1,
  35};
  36
  37static struct ep93xxfb_mach_info __initdata simone_fb_info = {
  38        .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
  39};
  40
  41static struct mmc_spi_platform_data simone_mmc_spi_data = {
  42        .detect_delay   = 500,
  43        .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
  44};
  45
  46static struct gpiod_lookup_table simone_mmc_spi_gpio_table = {
  47        .dev_id = "mmc_spi.0", /* "mmc_spi" @ CS0 */
  48        .table = {
  49                /* Card detect */
  50                GPIO_LOOKUP_IDX("A", 0, NULL, 0, GPIO_ACTIVE_LOW),
  51                { },
  52        },
  53};
  54
  55static struct spi_board_info simone_spi_devices[] __initdata = {
  56        {
  57                .modalias               = "mmc_spi",
  58                .platform_data          = &simone_mmc_spi_data,
  59                /*
  60                 * We use 10 MHz even though the maximum is 3.7 MHz. The driver
  61                 * will limit it automatically to max. frequency.
  62                 */
  63                .max_speed_hz           = 10 * 1000 * 1000,
  64                .bus_num                = 0,
  65                .chip_select            = 0,
  66                .mode                   = SPI_MODE_3,
  67        },
  68};
  69
  70/*
  71 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
  72 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
  73 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
  74 */
  75static struct gpiod_lookup_table simone_spi_cs_gpio_table = {
  76        .dev_id = "spi0",
  77        .table = {
  78                GPIO_LOOKUP("A", 1, "cs", GPIO_ACTIVE_LOW),
  79                { },
  80        },
  81};
  82
  83static struct ep93xx_spi_info simone_spi_info __initdata = {
  84        .use_dma = 1,
  85};
  86
  87static struct i2c_board_info __initdata simone_i2c_board_info[] = {
  88        {
  89                I2C_BOARD_INFO("ds1337", 0x68),
  90        },
  91};
  92
  93static struct platform_device simone_audio_device = {
  94        .name           = "simone-audio",
  95        .id             = -1,
  96};
  97
  98static void __init simone_register_audio(void)
  99{
 100        ep93xx_register_ac97();
 101        platform_device_register(&simone_audio_device);
 102}
 103
 104static void __init simone_init_machine(void)
 105{
 106        ep93xx_init_devices();
 107        ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
 108        ep93xx_register_eth(&simone_eth_data, 1);
 109        ep93xx_register_fb(&simone_fb_info);
 110        ep93xx_register_i2c(simone_i2c_board_info,
 111                            ARRAY_SIZE(simone_i2c_board_info));
 112        gpiod_add_lookup_table(&simone_mmc_spi_gpio_table);
 113        gpiod_add_lookup_table(&simone_spi_cs_gpio_table);
 114        ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
 115                            ARRAY_SIZE(simone_spi_devices));
 116        simone_register_audio();
 117}
 118
 119MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
 120        /* Maintainer: Ryan Mallon */
 121        .atag_offset    = 0x100,
 122        .map_io         = ep93xx_map_io,
 123        .init_irq       = ep93xx_init_irq,
 124        .init_time      = ep93xx_timer_init,
 125        .init_machine   = simone_init_machine,
 126        .init_late      = ep93xx_init_late,
 127        .restart        = ep93xx_restart,
 128MACHINE_END
 129