LXR linux/arch/avr32/boards/atstk1000/atstk1003.c

   1/*
   2 * ATSTK1003 daughterboard-specific init code
   3 *
   4 * Copyright (C) 2007 Atmel Corporation
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10#include <linux/clk.h>
  11#include <linux/err.h>
  12#include <linux/init.h>
  13#include <linux/kernel.h>
  14#include <linux/platform_device.h>
  15#include <linux/string.h>
  16#include <linux/types.h>
  17
  18#include <linux/spi/at73c213.h>
  19#include <linux/spi/spi.h>
  20#include <linux/atmel-mci.h>
  21
  22#include <asm/setup.h>
  23
  24#include <mach/at32ap700x.h>
  25#include <mach/board.h>
  26#include <mach/init.h>
  27#include <mach/portmux.h>
  28
  29#include "atstk1000.h"
  30
  31/* Oscillator frequencies. These are board specific */
  32unsigned long at32_board_osc_rates[3] = {
  33        [0] = 32768,    /* 32.768 kHz on RTC osc */
  34        [1] = 20000000, /* 20 MHz on osc0 */
  35        [2] = 12000000, /* 12 MHz on osc1 */
  36};
  37
  38#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  39static struct at73c213_board_info at73c213_data = {
  40        .ssc_id         = 0,
  41        .shortname      = "AVR32 STK1000 external DAC",
  42};
  43#endif
  44
  45#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  46static struct spi_board_info spi0_board_info[] __initdata = {
  47#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  48        {
  49                /* AT73C213 */
  50                .modalias       = "at73c213",
  51                .max_speed_hz   = 200000,
  52                .chip_select    = 0,
  53                .mode           = SPI_MODE_1,
  54                .platform_data  = &at73c213_data,
  55        },
  56#endif
  57        /*
  58         * We can control the LTV350QV LCD panel, but it isn't much
  59         * point since we don't have an LCD controller...
  60         */
  61};
  62#endif
  63
  64#ifdef CONFIG_BOARD_ATSTK100X_SPI1
  65static struct spi_board_info spi1_board_info[] __initdata = { {
  66        /* patch in custom entries here */
  67} };
  68#endif
  69
  70#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
  71static struct mci_platform_data __initdata mci0_data = {
  72        .slot[0] = {
  73                .bus_width      = 4,
  74                .detect_pin     = -ENODEV,
  75                .wp_pin         = -ENODEV,
  76        },
  77};
  78#endif
  79
  80#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  81static void __init atstk1003_setup_extdac(void)
  82{
  83        struct clk *gclk;
  84        struct clk *pll;
  85
  86        gclk = clk_get(NULL, "gclk0");
  87        if (IS_ERR(gclk))
  88                goto err_gclk;
  89        pll = clk_get(NULL, "pll0");
  90        if (IS_ERR(pll))
  91                goto err_pll;
  92
  93        if (clk_set_parent(gclk, pll)) {
  94                pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
  95                goto err_set_clk;
  96        }
  97
  98        at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);
  99        at73c213_data.dac_clk = gclk;
 100
 101err_set_clk:
 102        clk_put(pll);
 103err_pll:
 104        clk_put(gclk);
 105err_gclk:
 106        return;
 107}
 108#else
 109static void __init atstk1003_setup_extdac(void)
 110{
 111
 112}
 113#endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 114
 115void __init setup_board(void)
 116{
 117#ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 118        at32_map_usart(0, 1, 0);        /* USART 0/B: /dev/ttyS1, IRDA */
 119#else
 120        at32_map_usart(1, 0, 0);        /* USART 1/A: /dev/ttyS0, DB9 */
 121#endif
 122        /* USART 2/unused: expansion connector */
 123        at32_map_usart(3, 2, 0);        /* USART 3/C: /dev/ttyS2, DB9 */
 124
 125        at32_setup_serial_console(0);
 126}
 127
 128static int __init atstk1003_init(void)
 129{
 130        /*
 131         * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 132         * SDRAM-specific pins so that nobody messes with them.
 133         */
 134        at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
 135
 136#ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 137        at32_add_device_usart(1);
 138#else
 139        at32_add_device_usart(0);
 140#endif
 141        at32_add_device_usart(2);
 142
 143#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 144        at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 145#endif
 146#ifdef CONFIG_BOARD_ATSTK100X_SPI1
 147        at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 148#endif
 149#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 150        at32_add_device_mci(0, &mci0_data);
 151#endif
 152        at32_add_device_usba(0, NULL);
 153#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 154        at32_add_device_ssc(0, ATMEL_SSC_TX);
 155#endif
 156
 157        atstk1000_setup_j2_leds();
 158        atstk1003_setup_extdac();
 159
 160        return 0;
 161}
 162postcore_initcall(atstk1003_init);
 163