setup.c

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/*
 * Board-specific setup code for the MIMC200
 *
 * Copyright (C) 2008 Mercury IMC Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

extern struct atmel_lcdfb_info mimc200_lcdc_data;

#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/i2c-gpio.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/leds.h>
#include <linux/spi/spi.h>
#include <linux/spi/eeprom.h>

#include <video/atmel_lcdc.h>
#include <linux/fb.h>

#include <linux/atmel-mci.h>
#include <linux/io.h>
#include <asm/setup.h>

#include <mach/at32ap700x.h>
#include <mach/board.h>
#include <mach/init.h>
#include <mach/portmux.h>

/* Oscillator frequencies. These are board-specific */
unsigned long at32_board_osc_rates[3] = {
    [0] = 32768,    /* 32.768 kHz on RTC osc */
    [1] = 10000000, /* 10 MHz on osc0 */
    [2] = 12000000, /* 12 MHz on osc1 */
};

/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;

static struct fb_videomode __initdata pt0434827_modes[] = {
    {
        .name       = "480x272 @ 72",
        .refresh    = 72,
        .xres       = 480,      .yres       = 272,
        .pixclock   = KHZ2PICOS(10000),

        .left_margin    = 1,        .right_margin   = 1,
        .upper_margin   = 12,       .lower_margin   = 1,
        .hsync_len  = 42,       .vsync_len  = 1,

        .sync       = 0,
        .vmode      = FB_VMODE_NONINTERLACED,
    },
};

static struct fb_monspecs __initdata mimc200_default_monspecs = {
    .manufacturer       = "PT",
    .monitor        = "PT0434827-A401",
    .modedb         = pt0434827_modes,
    .modedb_len     = ARRAY_SIZE(pt0434827_modes),
    .hfmin          = 14820,
    .hfmax          = 22230,
    .vfmin          = 60,
    .vfmax          = 85,
    .dclkmax        = 25200000,
};

struct atmel_lcdfb_info __initdata mimc200_lcdc_data = {
    .default_bpp        = 16,
    .default_dmacon     = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
    .default_lcdcon2    = (ATMEL_LCDC_DISTYPE_TFT
                   | ATMEL_LCDC_INVCLK
                   | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
                   | ATMEL_LCDC_MEMOR_BIG),
    .default_monspecs   = &mimc200_default_monspecs,
    .guard_time     = 2,
};

struct eth_addr {
    u8 addr[6];
};
static struct eth_addr __initdata hw_addr[2];
static struct macb_platform_data __initdata eth_data[2];

static struct spi_eeprom eeprom_25lc010 = {
        .name = "25lc010",
        .byte_len = 128,
        .page_size = 16,
        .flags = EE_ADDR1,
};

static struct spi_board_info spi0_board_info[] __initdata = {
    {
        .modalias   = "rtc-ds1390",
        .max_speed_hz   = 4000000,
        .chip_select    = 2,
    },
    {
        .modalias   = "at25",
        .max_speed_hz   = 1000000,
        .chip_select    = 1,
        .mode       = SPI_MODE_3,
        .platform_data  = &eeprom_25lc010,
    },
};

static struct mci_platform_data __initdata mci0_data = {
    .slot[0] = {
        .bus_width  = 4,
        .detect_pin = GPIO_PIN_PA(26),
        .wp_pin     = GPIO_PIN_PA(27),
    },
};

/*
 * The next two functions should go away as the boot loader is
 * supposed to initialize the macb address registers with a valid
 * ethernet address. But we need to keep it around for a while until
 * we can be reasonably sure the boot loader does this.
 *
 * The phy_id is ignored as the driver will probe for it.
 */
static int __init parse_tag_ethernet(struct tag *tag)
{
    int i;

    i = tag->u.ethernet.mac_index;
    if (i < ARRAY_SIZE(hw_addr))
        memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
               sizeof(hw_addr[i].addr));

    return 0;
}
__tagtable(ATAG_ETHERNET, parse_tag_ethernet);

static void __init set_hw_addr(struct platform_device *pdev)
{
    struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    const u8 *addr;
    void __iomem *regs;
    struct clk *pclk;

    if (!res)
        return;
    if (pdev->id >= ARRAY_SIZE(hw_addr))
        return;

    addr = hw_addr[pdev->id].addr;
    if (!is_valid_ether_addr(addr))
        return;

    /*
     * Since this is board-specific code, we'll cheat and use the
     * physical address directly as we happen to know that it's
     * the same as the virtual address.
     */
    regs = (void __iomem __force *)res->start;
    pclk = clk_get(&pdev->dev, "pclk");
    if (IS_ERR(pclk))
        return;

    clk_enable(pclk);
    __raw_writel((addr[3] << 24) | (addr[2] << 16)
             | (addr[1] << 8) | addr[0], regs + 0x98);
    __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
    clk_disable(pclk);
    clk_put(pclk);
}

void __init setup_board(void)
{
    at32_map_usart(0, 0, 0);    /* USART 0: /dev/ttyS0 (TTL --> Altera) */
    at32_map_usart(1, 1, 0);    /* USART 1: /dev/ttyS1 (RS232) */
    at32_map_usart(2, 2, 0);    /* USART 2: /dev/ttyS2 (RS485) */
    at32_map_usart(3, 3, 0);    /* USART 3: /dev/ttyS3 (RS422 Multidrop) */
}

static struct i2c_gpio_platform_data i2c_gpio_data = {
    .sda_pin        = GPIO_PIN_PA(6),
    .scl_pin        = GPIO_PIN_PA(7),
    .sda_is_open_drain  = 1,
    .scl_is_open_drain  = 1,
    .udelay         = 2,    /* close to 100 kHz */
};

static struct platform_device i2c_gpio_device = {
    .name       = "i2c-gpio",
    .id     = 0,
    .dev        = {
    .platform_data  = &i2c_gpio_data,
    },
};

static struct i2c_board_info __initdata i2c_info[] = {
};

static int __init mimc200_init(void)
{
    /*
     * MIMC200 uses 16-bit SDRAM interface, so we don't need to
     * reserve any pins for it.
     */

    at32_add_device_usart(0);
    at32_add_device_usart(1);
    at32_add_device_usart(2);
    at32_add_device_usart(3);

    set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
    set_hw_addr(at32_add_device_eth(1, &eth_data[1]));

    at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
    at32_add_device_mci(0, &mci0_data);
    at32_add_device_usba(0, NULL);

    at32_select_periph(GPIO_PIOB_BASE, 1 << 28, 0, AT32_GPIOF_PULLUP);
    at32_select_gpio(i2c_gpio_data.sda_pin,
        AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
    at32_select_gpio(i2c_gpio_data.scl_pin,
        AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
    platform_device_register(&i2c_gpio_device);
    i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));

    at32_add_device_lcdc(0, &mimc200_lcdc_data,
                 fbmem_start, fbmem_size,
                 ATMEL_LCDC_CONTROL | ATMEL_LCDC_ALT_CONTROL | ATMEL_LCDC_ALT_24B_DATA);

    return 0;
}
postcore_initcall(mimc200_init);