LXR uboot/board/bf533-stamp/ide-cf.c

   1/*
   2 * CF IDE addon card code
   3 *
   4 * Enter bugs at http://blackfin.uclinux.org/
   5 *
   6 * Copyright (c) 2005-2009 Analog Devices Inc.
   7 *
   8 * Licensed under the GPL-2 or later.
   9 */
  10
  11#include <common.h>
  12#include <config.h>
  13#include <asm/blackfin.h>
  14
  15void cf_outb(unsigned char val, volatile unsigned char *addr)
  16{
  17        /* "ETHERNET" means the expansion memory banks */
  18        swap_to(ETHERNET);
  19
  20        *addr = val;
  21        SSYNC();
  22
  23        swap_to(FLASH);
  24}
  25
  26unsigned char cf_inb(volatile unsigned char *addr)
  27{
  28        unsigned char c;
  29
  30        swap_to(ETHERNET);
  31
  32        c = *addr;
  33        SSYNC();
  34
  35        swap_to(FLASH);
  36
  37        return c;
  38}
  39
  40void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words)
  41{
  42        int i;
  43
  44        swap_to(ETHERNET);
  45
  46        for (i = 0; i < words; i++) {
  47                *(sect_buf + i) = *addr;
  48                SSYNC();
  49        }
  50
  51        swap_to(FLASH);
  52}
  53
  54void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words)
  55{
  56        int i;
  57
  58        swap_to(ETHERNET);
  59
  60        for (i = 0; i < words; i++) {
  61                *addr = *(sect_buf + i);
  62                SSYNC();
  63        }
  64
  65        swap_to(FLASH);
  66}
  67
  68/* Definitions used in  Compact Flash Boot support */
  69#define FIO_EDGE_CF_BITS        0x0000
  70#define FIO_POLAR_CF_BITS       0x0000
  71#define FIO_EDGE_BITS           0x1E0
  72#define FIO_POLAR_BITS          0x160
  73
  74/* Compact flash status bits in status register */
  75#define CF_STAT_BITS    0x00000060
  76
  77void cf_ide_init(void)
  78{
  79        int i, cf_stat;
  80
  81        /* Check whether CF card is inserted */
  82        bfin_write_FIO_EDGE(FIO_EDGE_CF_BITS);
  83        bfin_write_FIO_POLAR(FIO_POLAR_CF_BITS);
  84        for (i = 0; i < 0x300; i++)
  85                asm volatile("nop;");
  86
  87        cf_stat = bfin_read_FIO_FLAG_S() & CF_STAT_BITS;
  88
  89        bfin_write_FIO_EDGE(FIO_EDGE_BITS);
  90        bfin_write_FIO_POLAR(FIO_POLAR_BITS);
  91
  92        if (!cf_stat) {
  93                for (i = 0; i < 0x3000; i++)
  94                        asm volatile("nop;");
  95
  96                ide_init();
  97        }
  98}
  99