atstk1003.c

Go to the documentation of this file.

/*
 * 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 <linux/atmel-mci.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

#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
static struct mci_platform_data __initdata mci0_data = {
    .slot[0] = {
        .bus_width  = 4,
        .detect_pin = -ENODEV,
        .wp_pin     = -ENODEV,
    },
};
#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_PIOA_BASE, (1 << 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, 0);    /* USART 0/B: /dev/ttyS1, IRDA */
#else
    at32_map_usart(1, 0, 0);    /* USART 1/A: /dev/ttyS0, DB9 */
#endif
    /* USART 2/unused: expansion connector */
    at32_map_usart(3, 2, 0);    /* 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_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);

#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, &mci0_data);
#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);