vision_ep9307.c

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/*
 * arch/arm/mach-ep93xx/vision_ep9307.c
 * Vision Engraving Systems EP9307 SoM support.
 *
 * Copyright (C) 2008-2011 Vision Engraving Systems
 * H Hartley Sweeten <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/fb.h>
#include <linux/io.h>
#include <linux/mtd/partitions.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/i2c/pca953x.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/host.h>

#include <mach/hardware.h>
#include <linux/platform_data/video-ep93xx.h>
#include <linux/platform_data/spi-ep93xx.h>
#include <mach/gpio-ep93xx.h>

#include <asm/hardware/vic.h>
#include <asm/mach-types.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>

#include "soc.h"

/*************************************************************************
 * Static I/O mappings for the FPGA
 *************************************************************************/
#define VISION_PHYS_BASE    EP93XX_CS7_PHYS_BASE
#define VISION_VIRT_BASE    0xfebff000

static struct map_desc vision_io_desc[] __initdata = {
    {
        .virtual    = VISION_VIRT_BASE,
        .pfn        = __phys_to_pfn(VISION_PHYS_BASE),
        .length     = SZ_4K,
        .type       = MT_DEVICE,
    },
};

static void __init vision_map_io(void)
{
    ep93xx_map_io();

    iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
}

/*************************************************************************
 * Ethernet
 *************************************************************************/
static struct ep93xx_eth_data vision_eth_data __initdata = {
    .phy_id     = 1,
};

/*************************************************************************
 * Framebuffer
 *************************************************************************/
#define VISION_LCD_ENABLE   EP93XX_GPIO_LINE_EGPIO1

static int vision_lcd_setup(struct platform_device *pdev)
{
    int err;

    err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
                dev_name(&pdev->dev));
    if (err)
        return err;

    ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
                 EP93XX_SYSCON_DEVCFG_RASONP3 |
                 EP93XX_SYSCON_DEVCFG_EXVC);

    return 0;
}

static void vision_lcd_teardown(struct platform_device *pdev)
{
    gpio_free(VISION_LCD_ENABLE);
}

static void vision_lcd_blank(int blank_mode, struct fb_info *info)
{
    if (blank_mode)
        gpio_set_value(VISION_LCD_ENABLE, 0);
    else
        gpio_set_value(VISION_LCD_ENABLE, 1);
}

static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
    .num_modes  = EP93XXFB_USE_MODEDB,
    .bpp        = 16,
    .flags      = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
    .setup      = vision_lcd_setup,
    .teardown   = vision_lcd_teardown,
    .blank      = vision_lcd_blank,
};


/*************************************************************************
 * GPIO Expanders
 *************************************************************************/
#define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
#define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
#define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
#define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)

static struct pca953x_platform_data pca953x_74_gpio_data = {
    .gpio_base  = PCA9539_74_GPIO_BASE,
    .irq_base   = EP93XX_BOARD_IRQ(0),
};

static struct pca953x_platform_data pca953x_75_gpio_data = {
    .gpio_base  = PCA9539_75_GPIO_BASE,
    .irq_base   = -1,
};

static struct pca953x_platform_data pca953x_76_gpio_data = {
    .gpio_base  = PCA9539_76_GPIO_BASE,
    .irq_base   = -1,
};

static struct pca953x_platform_data pca953x_77_gpio_data = {
    .gpio_base  = PCA9539_77_GPIO_BASE,
    .irq_base   = -1,
};

/*************************************************************************
 * I2C Bus
 *************************************************************************/
static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
    .sda_pin        = EP93XX_GPIO_LINE_EEDAT,
    .scl_pin        = EP93XX_GPIO_LINE_EECLK,
};

static struct i2c_board_info vision_i2c_info[] __initdata = {
    {
        I2C_BOARD_INFO("isl1208", 0x6f),
        .irq        = IRQ_EP93XX_EXT1,
    }, {
        I2C_BOARD_INFO("pca9539", 0x74),
        .platform_data  = &pca953x_74_gpio_data,
    }, {
        I2C_BOARD_INFO("pca9539", 0x75),
        .platform_data  = &pca953x_75_gpio_data,
    }, {
        I2C_BOARD_INFO("pca9539", 0x76),
        .platform_data  = &pca953x_76_gpio_data,
    }, {
        I2C_BOARD_INFO("pca9539", 0x77),
        .platform_data  = &pca953x_77_gpio_data,
    },
};

/*************************************************************************
 * SPI Flash
 *************************************************************************/
#define VISION_SPI_FLASH_CS EP93XX_GPIO_LINE_EGPIO7

static struct mtd_partition vision_spi_flash_partitions[] = {
    {
        .name   = "SPI bootstrap",
        .offset = 0,
        .size   = SZ_4K,
    }, {
        .name   = "Bootstrap config",
        .offset = MTDPART_OFS_APPEND,
        .size   = SZ_4K,
    }, {
        .name   = "System config",
        .offset = MTDPART_OFS_APPEND,
        .size   = MTDPART_SIZ_FULL,
    },
};

static struct flash_platform_data vision_spi_flash_data = {
    .name       = "SPI Flash",
    .parts      = vision_spi_flash_partitions,
    .nr_parts   = ARRAY_SIZE(vision_spi_flash_partitions),
};

static int vision_spi_flash_hw_setup(struct spi_device *spi)
{
    return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
                spi->modalias);
}

static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
{
    gpio_free(VISION_SPI_FLASH_CS);
}

static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
{
    gpio_set_value(VISION_SPI_FLASH_CS, value);
}

static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
    .setup      = vision_spi_flash_hw_setup,
    .cleanup    = vision_spi_flash_hw_cleanup,
    .cs_control = vision_spi_flash_hw_cs_control,
};

/*************************************************************************
 * SPI SD/MMC host
 *************************************************************************/
#define VISION_SPI_MMC_CS   EP93XX_GPIO_LINE_G(2)
#define VISION_SPI_MMC_WP   EP93XX_GPIO_LINE_F(0)
#define VISION_SPI_MMC_CD   EP93XX_GPIO_LINE_EGPIO15

static struct gpio vision_spi_mmc_gpios[] = {
    { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
    { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
};

static int vision_spi_mmc_init(struct device *pdev,
            irqreturn_t (*func)(int, void *), void *pdata)
{
    int err;

    err = gpio_request_array(vision_spi_mmc_gpios,
                 ARRAY_SIZE(vision_spi_mmc_gpios));
    if (err)
        return err;

    err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
    if (err)
        goto exit_err;

    err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
            IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
    if (err)
        goto exit_err;

    return 0;

exit_err:
    gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
    return err;

}

static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
{
    free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
    gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
}

static int vision_spi_mmc_get_ro(struct device *pdev)
{
    return !!gpio_get_value(VISION_SPI_MMC_WP);
}

static int vision_spi_mmc_get_cd(struct device *pdev)
{
    return !gpio_get_value(VISION_SPI_MMC_CD);
}

static struct mmc_spi_platform_data vision_spi_mmc_data = {
    .init       = vision_spi_mmc_init,
    .exit       = vision_spi_mmc_exit,
    .get_ro     = vision_spi_mmc_get_ro,
    .get_cd     = vision_spi_mmc_get_cd,
    .detect_delay   = 100,
    .powerup_msecs  = 100,
    .ocr_mask   = MMC_VDD_32_33 | MMC_VDD_33_34,
};

static int vision_spi_mmc_hw_setup(struct spi_device *spi)
{
    return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
                spi->modalias);
}

static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
{
    gpio_free(VISION_SPI_MMC_CS);
}

static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
{
    gpio_set_value(VISION_SPI_MMC_CS, value);
}

static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
    .setup      = vision_spi_mmc_hw_setup,
    .cleanup    = vision_spi_mmc_hw_cleanup,
    .cs_control = vision_spi_mmc_hw_cs_control,
};

/*************************************************************************
 * SPI Bus
 *************************************************************************/
static struct spi_board_info vision_spi_board_info[] __initdata = {
    {
        .modalias       = "sst25l",
        .platform_data      = &vision_spi_flash_data,
        .controller_data    = &vision_spi_flash_hw,
        .max_speed_hz       = 20000000,
        .bus_num        = 0,
        .chip_select        = 0,
        .mode           = SPI_MODE_3,
    }, {
        .modalias       = "mmc_spi",
        .platform_data      = &vision_spi_mmc_data,
        .controller_data    = &vision_spi_mmc_hw,
        .max_speed_hz       = 20000000,
        .bus_num        = 0,
        .chip_select        = 1,
        .mode           = SPI_MODE_3,
    },
};

static struct ep93xx_spi_info vision_spi_master __initdata = {
    .num_chipselect     = ARRAY_SIZE(vision_spi_board_info),
};

/*************************************************************************
 * Machine Initialization
 *************************************************************************/
static void __init vision_init_machine(void)
{
    ep93xx_init_devices();
    ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
    ep93xx_register_eth(&vision_eth_data, 1);
    ep93xx_register_fb(&ep93xxfb_info);
    ep93xx_register_pwm(1, 0);

    /*
     * Request the gpio expander's interrupt gpio line now to prevent
     * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
     */
    if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
                "pca9539:74"))
        pr_warn("cannot request interrupt gpio for pca9539:74\n");

    vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));

    ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
                ARRAY_SIZE(vision_i2c_info));
    ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
                ARRAY_SIZE(vision_spi_board_info));
}

MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
    /* Maintainer: H Hartley Sweeten <[email protected]> */
    .atag_offset    = 0x100,
    .map_io     = vision_map_io,
    .init_irq   = ep93xx_init_irq,
    .handle_irq = vic_handle_irq,
    .timer      = &ep93xx_timer,
    .init_machine   = vision_init_machine,
    .init_late  = ep93xx_init_late,
    .restart    = ep93xx_restart,
MACHINE_END