arch/avr32/boards/atstk1000/atstk1004.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 <video/atmel_lcdc.h>
  22
  23 #include <asm/setup.h>
  24
  25 #include <asm/arch/at32ap700x.h>
  26 #include <asm/arch/board.h>
  27 #include <asm/arch/init.h>
  28 #include <asm/arch/portmux.h>
  29
  30 #include "atstk1000.h"
  31
  32 /* Oscillator frequencies. These are board specific */
  33 unsigned long at32_board_osc_rates[3] = {
  34         [0] = 32768,    /* 32.768 kHz on RTC osc */
  35         [1] = 20000000, /* 20 MHz on osc0 */
  36         [2] = 12000000, /* 12 MHz on osc1 */
  37 };
  38
  39 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  40 static struct at73c213_board_info at73c213_data = {
  41         .ssc_id         = 0,
  42         .shortname      = "AVR32 STK1000 external DAC",
  43 };
  44 #endif
  45
  46 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  47 static struct spi_board_info spi0_board_info[] __initdata = {
  48 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  49         {
  50                 /* AT73C213 */
  51                 .modalias       = "at73c213",
  52                 .max_speed_hz   = 200000,
  53                 .chip_select    = 0,
  54                 .mode           = SPI_MODE_1,
  55                 .platform_data  = &at73c213_data,
  56         },
  57 #endif
  58         {
  59                 /* QVGA display */
  60                 .modalias       = "ltv350qv",
  61                 .max_speed_hz   = 16000000,
  62                 .chip_select    = 1,
  63                 .mode           = SPI_MODE_3,
  64         },
  65 };
  66 #endif
  67
  68 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
  69 static struct spi_board_info spi1_board_info[] __initdata = { {
  70         /* patch in custom entries here */
  71 } };
  72 #endif
  73
  74 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  75 static void __init atstk1004_setup_extdac(void)
  76 {
  77         struct clk *gclk;
  78         struct clk *pll;
  79
  80         gclk = clk_get(NULL, "gclk0");
  81         if (IS_ERR(gclk))
  82                 goto err_gclk;
  83         pll = clk_get(NULL, "pll0");
  84         if (IS_ERR(pll))
  85                 goto err_pll;
  86
  87         if (clk_set_parent(gclk, pll)) {
  88                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
  89                 goto err_set_clk;
  90         }
  91
  92         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
  93         at73c213_data.dac_clk = gclk;
  94
  95 err_set_clk:
  96         clk_put(pll);
  97 err_pll:
  98         clk_put(gclk);
  99 err_gclk:
 100         return;
 101 }
 102 #else
 103 static void __init atstk1004_setup_extdac(void)
 104 {
 105
 106 }
 107 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 108
 109 void __init setup_board(void)
 110 {
 111 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 112         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 113 #else
 114         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 115 #endif
 116         /* USART 2/unused: expansion connector */
 117         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 118
 119         at32_setup_serial_console(0);
 120 }
 121
 122 static int __init atstk1004_init(void)
 123 {
 124         at32_add_system_devices();
 125
 126 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 127         at32_add_device_usart(1);
 128 #else
 129         at32_add_device_usart(0);
 130 #endif
 131         at32_add_device_usart(2);
 132
 133 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 134         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 135 #endif
 136 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 137         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 138 #endif
 139 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 140         at32_add_device_mci(0);
 141 #endif
 142         at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 143                              fbmem_start, fbmem_size, 0);
 144         at32_add_device_usba(0, NULL);
 145 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 146         at32_add_device_ssc(0, ATMEL_SSC_TX);
 147 #endif
 148
 149         atstk1000_setup_j2_leds();
 150         atstk1004_setup_extdac();
 151
 152         return 0;
 153 }
 154 postcore_initcall(atstk1004_init);