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setup.c

/*
 * Board-specific setup code for the Miromico Hammerhead board
 *
 * Copyright (C) 2008 Miromico AG
 *
 * 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.
 */
#include <linux/atmel-mci.h>
#include <linux/clk.h>
#include <linux/fb.h>
#include <linux/etherdevice.h>
#include <linux/i2c.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/spi/spi.h>

#include <video/atmel_lcdc.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>

#include <sound/atmel-ac97c.h>

#include "../../mach-at32ap/clock.h"
#include "flash.h"

/* Oscillator frequencies. These are board-specific */
unsigned long at32_board_osc_rates[3] = {
      [0] = 32768,      /* 32.768 kHz on RTC osc */
      [1] = 25000000, /* 25MHz on osc0 */
      [2] = 12000000,   /* 12 MHz on osc1 */
};

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

#ifdef CONFIG_BOARD_HAMMERHEAD_LCD
static struct fb_videomode __initdata hda350tlv_modes[] = {
      {
            .name       = "320x240 @ 75",
            .refresh    = 75,
            .xres       = 320,
            .yres       = 240,
            .pixclock   = KHZ2PICOS(6891),

            .left_margin      = 48,
            .right_margin     = 18,
            .upper_margin     = 18,
            .lower_margin     = 4,
            .hsync_len  = 20,
            .vsync_len  = 2,

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

static struct fb_monspecs __initdata hammerhead_hda350t_monspecs = {
      .manufacturer           = "HAN",
      .monitor          = "HDA350T-LV",
      .modedb                 = hda350tlv_modes,
      .modedb_len       = ARRAY_SIZE(hda350tlv_modes),
      .hfmin                  = 14900,
      .hfmax                  = 22350,
      .vfmin                  = 60,
      .vfmax                  = 90,
      .dclkmax          = 10000000,
};

struct atmel_lcdfb_info __initdata hammerhead_lcdc_data = {
      .default_bpp            = 24,
      .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 = &hammerhead_hda350t_monspecs,
      .guard_time       = 2,
};
#endif

static struct mci_platform_data __initdata mci0_data = {
      .slot[0] = {
            .bus_width  = 4,
            .detect_pin = -ENODEV,
            .wp_pin           = -ENODEV,
      },
};

struct eth_addr {
      u8 addr[6];
};

static struct eth_addr __initdata hw_addr[1];
static struct eth_platform_data __initdata eth_data[1];

/*
 * 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 = 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 (!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(1, 0, 0);      /* USART 1: /dev/ttyS0, DB9 */
      at32_setup_serial_console(0);
}

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[] = {};

#ifdef CONFIG_BOARD_HAMMERHEAD_SND
static struct ac97c_platform_data ac97c_data = {
      .reset_pin = GPIO_PIN_PA(16),
};
#endif

static int __init hammerhead_init(void)
{
      /*
       * Hammerhead uses 32-bit SDRAM interface. Reserve the
       * SDRAM-specific pins so that nobody messes with them.
       */
      at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);

      at32_add_device_usart(0);

      /* Reserve PB29 (GCLK3). This pin is used as clock source
       * for ETH PHY (25MHz). GCLK3 setup is done by U-Boot.
       */
      at32_reserve_pin(GPIO_PIOB_BASE, (1<<29));

      /*
       * Hammerhead uses only one ethernet port, so we don't set
       * address of second port
       */
      set_hw_addr(at32_add_device_eth(0, &eth_data[0]));

#ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
      at32_add_device_hh_fpga();
#endif
      at32_add_device_mci(0, &mci0_data);

#ifdef CONFIG_BOARD_HAMMERHEAD_USB
      at32_add_device_usba(0, NULL);
#endif
#ifdef CONFIG_BOARD_HAMMERHEAD_LCD
      at32_add_device_lcdc(0, &hammerhead_lcdc_data, fbmem_start,
                       fbmem_size, ATMEL_LCDC_PRI_24BIT);
#endif

      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));

#ifdef CONFIG_BOARD_HAMMERHEAD_SND
      at32_add_device_ac97c(0, &ac97c_data, AC97C_BOTH);
#endif

      /* Select the Touchscreen interrupt pin mode */
      at32_select_periph(GPIO_PIOB_BASE, 0x08000000, GPIO_PERIPH_A, 0);

      return 0;
}

postcore_initcall(hammerhead_init);

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