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atstk1002.c

/*
 * ATSTK1002 daughterboard-specific init code
 *
 * Copyright (C) 2005-2006 Atmel Corporation
 *
 * 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/clk.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/spi/spi.h>
#include <linux/spi/at73c213.h>

#include <video/atmel_lcdc.h>

#include <asm/io.h>
#include <asm/setup.h>
#include <asm/arch/at32ap7000.h>
#include <asm/arch/board.h>
#include <asm/arch/init.h>
#include <asm/arch/portmux.h>

#include "atstk1000.h"


struct eth_addr {
      u8 addr[6];
};

static struct eth_addr __initdata hw_addr[2];
static struct eth_platform_data __initdata eth_data[2] = {
      {
            /*
             * The MDIO pullups on STK1000 are a bit too weak for
             * the autodetection to work properly, so we have to
             * mask out everything but the correct address.
             */
            .phy_mask   = ~(1U << 16),
      },
      {
            .phy_mask   = ~(1U << 17),
      },
};

#ifndef CONFIG_BOARD_ATSTK1002_SW1_CUSTOM
#ifndef CONFIG_BOARD_ATSTK1002_SW3_CUSTOM
static struct at73c213_board_info at73c213_data = {
      .ssc_id           = 0,
      .shortname  = "AVR32 STK1000 external DAC",
};
#endif
#endif

#ifndef CONFIG_BOARD_ATSTK1002_SW1_CUSTOM
static struct spi_board_info spi0_board_info[] __initdata = {
#ifndef CONFIG_BOARD_ATSTK1002_SW3_CUSTOM
      {
            /* AT73C213 */
            .modalias   = "at73c213",
            .max_speed_hz     = 200000,
            .chip_select      = 0,
            .mode       = SPI_MODE_1,
            .platform_data    = &at73c213_data,
      },
#endif
      {
            /* QVGA display */
            .modalias   = "ltv350qv",
            .max_speed_hz     = 16000000,
            .chip_select      = 1,
            .mode       = SPI_MODE_3,
      },
};
#endif

#ifdef CONFIG_BOARD_ATSTK1002_SPI1
static struct spi_board_info spi1_board_info[] __initdata = { {
      /* patch in custom entries here */
} };
#endif

/*
 * 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 (!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);
}

#ifdef CONFIG_BOARD_ATSTK1002_J2_LED

static struct gpio_led stk_j2_led[] = {
#ifdef CONFIG_BOARD_ATSTK1002_J2_LED8
#define LEDSTRING "J2 jumpered to LED8"
      { .name = "led0:amber", .gpio = GPIO_PIN_PB( 8), },
      { .name = "led1:amber", .gpio = GPIO_PIN_PB( 9), },
      { .name = "led2:amber", .gpio = GPIO_PIN_PB(10), },
      { .name = "led3:amber", .gpio = GPIO_PIN_PB(13), },
      { .name = "led4:amber", .gpio = GPIO_PIN_PB(14), },
      { .name = "led5:amber", .gpio = GPIO_PIN_PB(15), },
      { .name = "led6:amber", .gpio = GPIO_PIN_PB(16), },
      { .name = "led7:amber", .gpio = GPIO_PIN_PB(30),
                  .default_trigger = "heartbeat", },
#else /* RGB */
#define LEDSTRING "J2 jumpered to RGB LEDs"
      { .name = "r1:red",     .gpio = GPIO_PIN_PB( 8), },
      { .name = "g1:green",   .gpio = GPIO_PIN_PB(10), },
      { .name = "b1:blue",    .gpio = GPIO_PIN_PB(14), },

      { .name = "r2:red",     .gpio = GPIO_PIN_PB( 9),
                  .default_trigger = "heartbeat", },
      { .name = "g2:green",   .gpio = GPIO_PIN_PB(13), },
      { .name = "b2:blue",    .gpio = GPIO_PIN_PB(15),
                  .default_trigger = "heartbeat", },
      /* PB16, PB30 unused */
#endif
};

static struct gpio_led_platform_data stk_j2_led_data = {
      .num_leds   = ARRAY_SIZE(stk_j2_led),
      .leds       = stk_j2_led,
};

static struct platform_device stk_j2_led_dev = {
      .name       = "leds-gpio",
      .id         = 2,  /* gpio block J2 */
      .dev        = {
            .platform_data    = &stk_j2_led_data,
      },
};

static void setup_j2_leds(void)
{
      unsigned    i;

      for (i = 0; i < ARRAY_SIZE(stk_j2_led); i++)
            at32_select_gpio(stk_j2_led[i].gpio, AT32_GPIOF_OUTPUT);

      printk("STK1002: " LEDSTRING "\n");
      platform_device_register(&stk_j2_led_dev);
}

#else
static void setup_j2_leds(void)
{
}
#endif

#ifndef CONFIG_BOARD_ATSTK1002_SW1_CUSTOM
#ifndef CONFIG_BOARD_ATSTK1002_SW3_CUSTOM
static void __init at73c213_set_clk(struct at73c213_board_info *info)
{
      struct clk *gclk;
      struct clk *pll;

      gclk = clk_get(NULL, "gclk0");
      if (IS_ERR(gclk))
            goto err_gclk;
      pll = clk_get(NULL, "pll0");
      if (IS_ERR(pll))
            goto err_pll;

      if (clk_set_parent(gclk, pll)) {
            pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
            goto err_set_clk;
      }

      at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
      info->dac_clk = gclk;

err_set_clk:
      clk_put(pll);
err_pll:
      clk_put(gclk);
err_gclk:
      return;
}
#endif
#endif

void __init setup_board(void)
{
#ifdef      CONFIG_BOARD_ATSTK1002_SW2_CUSTOM
      at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
#else
      at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
#endif
      /* USART 2/unused: expansion connector */
      at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */

      at32_setup_serial_console(0);
}

static int __init atstk1002_init(void)
{
      /*
       * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
       * SDRAM-specific pins so that nobody messes with them.
       */
      at32_reserve_pin(GPIO_PIN_PE(0));   /* DATA[16] */
      at32_reserve_pin(GPIO_PIN_PE(1));   /* DATA[17] */
      at32_reserve_pin(GPIO_PIN_PE(2));   /* DATA[18] */
      at32_reserve_pin(GPIO_PIN_PE(3));   /* DATA[19] */
      at32_reserve_pin(GPIO_PIN_PE(4));   /* DATA[20] */
      at32_reserve_pin(GPIO_PIN_PE(5));   /* DATA[21] */
      at32_reserve_pin(GPIO_PIN_PE(6));   /* DATA[22] */
      at32_reserve_pin(GPIO_PIN_PE(7));   /* DATA[23] */
      at32_reserve_pin(GPIO_PIN_PE(8));   /* DATA[24] */
      at32_reserve_pin(GPIO_PIN_PE(9));   /* DATA[25] */
      at32_reserve_pin(GPIO_PIN_PE(10));  /* DATA[26] */
      at32_reserve_pin(GPIO_PIN_PE(11));  /* DATA[27] */
      at32_reserve_pin(GPIO_PIN_PE(12));  /* DATA[28] */
      at32_reserve_pin(GPIO_PIN_PE(13));  /* DATA[29] */
      at32_reserve_pin(GPIO_PIN_PE(14));  /* DATA[30] */
      at32_reserve_pin(GPIO_PIN_PE(15));  /* DATA[31] */
      at32_reserve_pin(GPIO_PIN_PE(26));  /* SDCS           */

      at32_add_system_devices();

#ifdef      CONFIG_BOARD_ATSTK1002_SW2_CUSTOM
      at32_add_device_usart(1);
#else
      at32_add_device_usart(0);
#endif
      at32_add_device_usart(2);

#ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
      set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
#endif
#ifndef CONFIG_BOARD_ATSTK1002_SW1_CUSTOM
      at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
#endif
#ifdef CONFIG_BOARD_ATSTK1002_SPI1
      at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
      set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
#else
      at32_add_device_lcdc(0, &atstk1000_lcdc_data,
                       fbmem_start, fbmem_size);
#endif
      at32_add_device_usba(0, NULL);
#ifndef CONFIG_BOARD_ATSTK1002_SW3_CUSTOM
      at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif

      setup_j2_leds();

#ifndef CONFIG_BOARD_ATSTK1002_SW3_CUSTOM
#ifndef CONFIG_BOARD_ATSTK1002_SW1_CUSTOM
      at73c213_set_clk(&at73c213_data);
#endif
#endif

      return 0;
}
postcore_initcall(atstk1002_init);

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