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 */
  32 unsigned 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
  39 static 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
  46 static 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
  65 static 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
  71 static 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
  81 static 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
 101 err_set_clk:
 102         clk_put(pll);
 103 err_pll:
 104         clk_put(gclk);
 105 err_gclk:
 106         return;
 107 }
 108 #else
 109 static void __init atstk1003_setup_extdac(void)
 110 {
 111
 112 }
 113 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 114
 115 void __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
 128 static 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 }
 162 postcore_initcall(atstk1003_init);