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 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  31 static struct at73c213_board_info at73c213_data = {
  32         .ssc_id         = 0,
  33         .shortname      = "AVR32 STK1000 external DAC",
  34 };
  35 #endif
  36
  37 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  38 static struct spi_board_info spi0_board_info[] __initdata = {
  39 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  40         {
  41                 /* AT73C213 */
  42                 .modalias       = "at73c213",
  43                 .max_speed_hz   = 200000,
  44                 .chip_select    = 0,
  45                 .mode           = SPI_MODE_1,
  46                 .platform_data  = &at73c213_data,
  47         },
  48 #endif
  49         /*
  50          * We can control the LTV350QV LCD panel, but it isn't much
  51          * point since we don't have an LCD controller...
  52          */
  53 };
  54 #endif
  55
  56 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
  57 static struct spi_board_info spi1_board_info[] __initdata = { {
  58         /* patch in custom entries here */
  59 } };
  60 #endif
  61
  62 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  63 static void __init atstk1003_setup_extdac(void)
  64 {
  65         struct clk *gclk;
  66         struct clk *pll;
  67
  68         gclk = clk_get(NULL, "gclk0");
  69         if (IS_ERR(gclk))
  70                 goto err_gclk;
  71         pll = clk_get(NULL, "pll0");
  72         if (IS_ERR(pll))
  73                 goto err_pll;
  74
  75         if (clk_set_parent(gclk, pll)) {
  76                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
  77                 goto err_set_clk;
  78         }
  79
  80         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
  81         at73c213_data.dac_clk = gclk;
  82
  83 err_set_clk:
  84         clk_put(pll);
  85 err_pll:
  86         clk_put(gclk);
  87 err_gclk:
  88         return;
  89 }
  90 #else
  91 static void __init atstk1003_setup_extdac(void)
  92 {
  93
  94 }
  95 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
  96
  97 void __init setup_board(void)
  98 {
  99 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 100         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 101 #else
 102         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 103 #endif
 104         /* USART 2/unused: expansion connector */
 105         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 106
 107         at32_setup_serial_console(0);
 108 }
 109
 110 static int __init atstk1003_init(void)
 111 {
 112         /*
 113          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 114          * SDRAM-specific pins so that nobody messes with them.
 115          */
 116         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 117         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 118         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 119         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 120         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 121         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 122         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 123         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 124         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 125         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 126         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 127         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 128         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 129         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 130         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 131         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 132         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 133
 134         at32_add_system_devices();
 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);
 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);