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
  21 #include <asm/setup.h>
  22
  23 #include <asm/arch/at32ap700x.h>
  24 #include <asm/arch/board.h>
  25 #include <asm/arch/init.h>
  26 #include <asm/arch/portmux.h>
  27
  28 #include "atstk1000.h"
  29
  30 /* Oscillator frequencies. These are board specific */
  31 unsigned long at32_board_osc_rates[3] = {
  32         [0] = 32768,    /* 32.768 kHz on RTC osc */
  33         [1] = 20000000, /* 20 MHz on osc0 */
  34         [2] = 12000000, /* 12 MHz on osc1 */
  35 };
  36
  37 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  38 static struct at73c213_board_info at73c213_data = {
  39         .ssc_id         = 0,
  40         .shortname      = "AVR32 STK1000 external DAC",
  41 };
  42 #endif
  43
  44 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  45 static struct spi_board_info spi0_board_info[] __initdata = {
  46 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  47         {
  48                 /* AT73C213 */
  49                 .modalias       = "at73c213",
  50                 .max_speed_hz   = 200000,
  51                 .chip_select    = 0,
  52                 .mode           = SPI_MODE_1,
  53                 .platform_data  = &at73c213_data,
  54         },
  55 #endif
  56         /*
  57          * We can control the LTV350QV LCD panel, but it isn't much
  58          * point since we don't have an LCD controller...
  59          */
  60 };
  61 #endif
  62
  63 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
  64 static struct spi_board_info spi1_board_info[] __initdata = { {
  65         /* patch in custom entries here */
  66 } };
  67 #endif
  68
  69 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  70 static void __init atstk1003_setup_extdac(void)
  71 {
  72         struct clk *gclk;
  73         struct clk *pll;
  74
  75         gclk = clk_get(NULL, "gclk0");
  76         if (IS_ERR(gclk))
  77                 goto err_gclk;
  78         pll = clk_get(NULL, "pll0");
  79         if (IS_ERR(pll))
  80                 goto err_pll;
  81
  82         if (clk_set_parent(gclk, pll)) {
  83                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
  84                 goto err_set_clk;
  85         }
  86
  87         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
  88         at73c213_data.dac_clk = gclk;
  89
  90 err_set_clk:
  91         clk_put(pll);
  92 err_pll:
  93         clk_put(gclk);
  94 err_gclk:
  95         return;
  96 }
  97 #else
  98 static void __init atstk1003_setup_extdac(void)
  99 {
 100
 101 }
 102 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 103
 104 void __init setup_board(void)
 105 {
 106 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 107         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 108 #else
 109         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 110 #endif
 111         /* USART 2/unused: expansion connector */
 112         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 113
 114         at32_setup_serial_console(0);
 115 }
 116
 117 static int __init atstk1003_init(void)
 118 {
 119         /*
 120          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 121          * SDRAM-specific pins so that nobody messes with them.
 122          */
 123         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 124         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 125         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 126         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 127         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 128         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 129         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 130         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 131         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 132         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 133         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 134         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 135         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 136         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 137         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 138         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 139         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 140
 141         at32_add_system_devices();
 142
 143 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 144         at32_add_device_usart(1);
 145 #else
 146         at32_add_device_usart(0);
 147 #endif
 148         at32_add_device_usart(2);
 149
 150 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 151         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 152 #endif
 153 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 154         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 155 #endif
 156 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 157         at32_add_device_mci(0);
 158 #endif
 159         at32_add_device_usba(0, NULL);
 160 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 161         at32_add_device_ssc(0, ATMEL_SSC_TX);
 162 #endif
 163
 164         atstk1000_setup_j2_leds();
 165         atstk1003_setup_extdac();
 166
 167         return 0;
 168 }
 169 postcore_initcall(atstk1003_init);