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atstk1003.c

/*
 * ATSTK1003 daughterboard-specific init code
 *
 * Copyright (C) 2007 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/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/types.h>

#include <linux/spi/at73c213.h>
#include <linux/spi/spi.h>

#include <asm/setup.h>

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

#include "atstk1000.h"

/* Oscillator frequencies. These are board specific */
unsigned long at32_board_osc_rates[3] = {
      [0] = 32768,      /* 32.768 kHz on RTC osc */
      [1] = 20000000,   /* 20 MHz on osc0 */
      [2] = 12000000,   /* 12 MHz on osc1 */
};

#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static struct at73c213_board_info at73c213_data = {
      .ssc_id           = 0,
      .shortname  = "AVR32 STK1000 external DAC",
};
#endif

#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
static struct spi_board_info spi0_board_info[] __initdata = {
#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
      {
            /* AT73C213 */
            .modalias   = "at73c213",
            .max_speed_hz     = 200000,
            .chip_select      = 0,
            .mode       = SPI_MODE_1,
            .platform_data    = &at73c213_data,
      },
#endif
      /*
       * We can control the LTV350QV LCD panel, but it isn't much
       * point since we don't have an LCD controller...
       */
};
#endif

#ifdef CONFIG_BOARD_ATSTK100X_SPI1
static struct spi_board_info spi1_board_info[] __initdata = { {
      /* patch in custom entries here */
} };
#endif

#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static void __init atstk1003_setup_extdac(void)
{
      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);
      at73c213_data.dac_clk = gclk;

err_set_clk:
      clk_put(pll);
err_pll:
      clk_put(gclk);
err_gclk:
      return;
}
#else
static void __init atstk1003_setup_extdac(void)
{

}
#endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */

void __init setup_board(void)
{
#ifdef      CONFIG_BOARD_ATSTK100X_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 atstk1003_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_ATSTK100X_SW2_CUSTOM
      at32_add_device_usart(1);
#else
      at32_add_device_usart(0);
#endif
      at32_add_device_usart(2);

#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
      at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
#endif
#ifdef CONFIG_BOARD_ATSTK100X_SPI1
      at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
      at32_add_device_mci(0, NULL);
#endif
      at32_add_device_usba(0, NULL);
#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
      at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif

      atstk1000_setup_j2_leds();
      atstk1003_setup_extdac();

      return 0;
}
postcore_initcall(atstk1003_init);

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