board/netstal/hcu4/hcu4.c

   1 /*
   2  *(C) Copyright 2005-2008 Netstal Maschinen AG
   3  *    Niklaus Giger (Niklaus.Giger@netstal.com)
   4  *
   5  *    This source code is free software; you can redistribute it
   6  *    and/or modify it in source code form under the terms of the GNU
   7  *    General Public License as published by the Free Software
   8  *    Foundation; either version 2 of the License, or (at your option)
   9  *    any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License
  17  *    along with this program; if not, write to the Free Software
  18  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  19  */
  20
  21 #include  <common.h>
  22 #include  <ppc4xx.h>
  23 #include  <asm/processor.h>
  24 #include  <asm/io.h>
  25 #include  <asm-ppc/u-boot.h>
  26 #include  "../common/nm.h"
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 #define HCU_MACH_VERSIONS_REGISTER      (0x7C000000 + 0xF00000)
  31 #define HCU_SLOT_ADDRESS                (0x7C000000 + 0x400000)
  32 #define HCU_DIGITAL_IO_REGISTER         (0x7C000000 + 0x500000)
  33 #define HCU_SW_INSTALL_REQUESTED        0x10
  34
  35 /*
  36  * This function is run very early, out of flash, and before devices are
  37  * initialized. It is called by lib_ppc/board.c:board_init_f by virtue
  38  * of being in the init_sequence array.
  39  *
  40  * The SDRAM has been initialized already -- start.S:start called
  41  * init.S:init_sdram early on -- but it is not yet being used for
  42  * anything, not even stack. So be careful.
  43  */
  44
  45 /* Attention: If you want 1 microsecs times from the external oscillator
  46  * 0x00004051 is okay for u-boot/linux, but different from old vxworks values
  47  * 0x00804051 causes problems with u-boot and linux!
  48  */
  49 #define CPC0_CR0_VALUE  0x0030103c
  50 #define CPC0_CR1_VALUE  0x00004051
  51
  52 int board_early_init_f (void)
  53 {
  54         /*
  55          * Interrupt controller setup for the HCU4 board.
  56          * Note: IRQ 0-15  405GP internally generated; high; level sensitive
  57          *       IRQ 16    405GP internally generated; low; level sensitive
  58          *      IRQ 17-24 RESERVED/UNUSED
  59          *      IRQ 31 (EXT IRQ 6) (unused)
  60          */
  61         mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
  62         mtdcr(uicer, 0x00000000); /* disable all ints */
  63         mtdcr(uiccr, 0x00000000); /* set all to be non-critical */
  64         mtdcr(uicpr, 0xFFFFE000); /* set int polarities */
  65         mtdcr(uictr, 0x00000000); /* set int trigger levels */
  66         mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
  67
  68         mtdcr(CPC0_CR1, CPC0_CR1_VALUE);
  69         mtdcr(CPC0_ECR, 0x60606000);
  70         mtdcr(CPC0_EIRR, 0x7C000000);
  71
  72         return 0;
  73 }
  74
  75 #ifdef CONFIG_BOARD_PRE_INIT
  76 int board_pre_init (void)
  77 {
  78         return board_early_init_f ();
  79 }
  80 #endif
  81
  82 int sys_install_requested(void)
  83 {
  84         u16 ioValue = in_be16((u16 *)HCU_DIGITAL_IO_REGISTER);
  85         return (ioValue & HCU_SW_INSTALL_REQUESTED) != 0;
  86 }
  87
  88 int checkboard (void)
  89 {
  90         u16 boardVersReg = in_be16((u16 *)HCU_MACH_VERSIONS_REGISTER);
  91         u16 generation = boardVersReg & 0xf0;
  92         u16 index      = boardVersReg & 0x0f;
  93
  94         /* Cannot be done in board_early_init */
  95         mtdcr(cntrl0,  CPC0_CR0_VALUE);
  96
  97         /* Force /RTS to active. The board it not wired quite
  98          *  correctly to use cts/rtc flow control, so just force the
  99          *  /RST active and forget about it.
 100          */
 101         writeb (readb (0xef600404) | 0x03, 0xef600404);
 102         nm_show_print(generation, index, 0);
 103
 104         return 0;
 105 }
 106
 107 u32 hcu_led_get(void)
 108 {
 109         return (~(in_be32((u32 *)GPIO0_OR)) >> 23) & 0xff;
 110 }
 111
 112 /*
 113  * hcu_led_set  value to be placed into the LEDs (max 6 bit)
 114  */
 115 void hcu_led_set(u32 value)
 116 {
 117         u32   tmp = ~value;
 118
 119         tmp = (tmp << 23) | 0x7FFFFF;
 120         out_be32((u32 *)GPIO0_OR, tmp);
 121 }
 122
 123 /*
 124  * sdram_init - Dummy implementation for start.S, spd_sdram  or initdram
 125  *              used for HCUx
 126  */
 127 void sdram_init(void)
 128 {
 129         return;
 130 }
 131
 132 /*
 133  * hcu_get_slot
 134  */
 135 u32 hcu_get_slot(void)
 136 {
 137         u16 slot = in_be16((u16 *)HCU_SLOT_ADDRESS);
 138         return slot & 0x7f;
 139 }
 140
 141 /*
 142  * get_serial_number
 143  */
 144 u32 get_serial_number(void)
 145 {
 146         u32 serial = in_be32((u32 *)CFG_FLASH_BASE);
 147
 148         if (serial == 0xffffffff)
 149                 return 0;
 150
 151         return serial;
 152 }
 153
 154
 155 /*
 156  * misc_init_r.
 157  */
 158
 159 int misc_init_r(void)
 160 {
 161         common_misc_init_r();
 162         set_params_for_sw_install( sys_install_requested(), "hcu4" );
 163         return 0;
 164 }
 165
 166 long int initdram(int board_type)
 167 {
 168         long dram_size = 0;
 169         u16 boardVersReg = in_be16((u16 *)HCU_MACH_VERSIONS_REGISTER);
 170         u16 generation = boardVersReg & 0xf0;
 171         u16 index      = boardVersReg & 0x0f;
 172
 173         if (generation == HW_GENERATION_HCU3 && index < 0xf)
 174                 dram_size = 32 << 20;   /* 32 MB - RAM */
 175         else
 176                 dram_size = 64 << 20;   /* 64 MB - RAM */
 177         init_ppc405_sdram(dram_size);
 178
 179 #ifdef DEBUG
 180         show_sdram_registers();
 181 #endif
 182
 183         return dram_size;
 184 }
 185
 186 #if defined(CONFIG_POST)
 187 /*
 188  * Returns 1 if keys pressed to start the power-on long-running tests
 189  * Called from board_init_f().
 190  */
 191 int post_hotkeys_pressed(void)
 192 {
 193         return 0;       /* No hotkeys supported */
 194 }
 195 #endif /* CONFIG_POST */
 196
 197 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 198 void ft_board_setup(void *blob, bd_t *bd)
 199 {
 200         ft_cpu_setup(blob, bd);
 201
 202 }
 203 #endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */