arch/arm/mach-ep93xx/simone.c

   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
  33 static struct ep93xx_eth_data __initdata simone_eth_data = {
  34         .phy_id         = 1,
  35 };
  36
  37 static struct ep93xxfb_mach_info __initdata simone_fb_info = {
  38         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
  39 };
  40
  41 static 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
  46 static 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
  55 static 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  */
  75 static struct gpiod_lookup_table simone_spi_cs_gpio_table = {
  76         .dev_id = "ep93xx-spi.0",
  77         .table = {
  78                 GPIO_LOOKUP("A", 1, "cs", GPIO_ACTIVE_LOW),
  79                 { },
  80         },
  81 };
  82
  83 static struct ep93xx_spi_info simone_spi_info __initdata = {
  84         .use_dma = 1,
  85 };
  86
  87 static struct i2c_board_info __initdata simone_i2c_board_info[] = {
  88         {
  89                 I2C_BOARD_INFO("ds1337", 0x68),
  90         },
  91 };
  92
  93 static struct platform_device simone_audio_device = {
  94         .name           = "simone-audio",
  95         .id             = -1,
  96 };
  97
  98 static void __init simone_register_audio(void)
  99 {
 100         ep93xx_register_ac97();
 101         platform_device_register(&simone_audio_device);
 102 }
 103
 104 static 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
 119 MACHINE_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,
 128 MACHINE_END