LXR uboot/board/psyent/common/AMDLV065D.c

   1/*
   2 * (C) Copyright 2000-2004
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8
   9#include <common.h>
  10#include <asm/io.h>
  11
  12#define SECTSZ          (64 * 1024)
  13flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  14
  15/*----------------------------------------------------------------------*/
  16unsigned long flash_init (void)
  17{
  18        int i;
  19        unsigned long addr;
  20        flash_info_t *fli = &flash_info[0];
  21
  22        fli->size = CONFIG_SYS_FLASH_SIZE;
  23        fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  24        fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  25
  26        addr = CONFIG_SYS_FLASH_BASE;
  27        for (i = 0; i < fli->sector_count; ++i) {
  28                fli->start[i] = addr;
  29                addr += SECTSZ;
  30                fli->protect[i] = 1;
  31        }
  32
  33        return (CONFIG_SYS_FLASH_SIZE);
  34}
  35/*--------------------------------------------------------------------*/
  36void flash_print_info (flash_info_t * info)
  37{
  38        int i, k;
  39        int erased;
  40        unsigned long *addr;
  41
  42        printf ("  Size: %ld KB in %d Sectors\n",
  43                info->size >> 10, info->sector_count);
  44        printf ("  Sector Start Addresses:");
  45        for (i = 0; i < info->sector_count; ++i) {
  46
  47                /* Check if whole sector is erased */
  48                erased = 1;
  49                addr = (unsigned long *) info->start[i];
  50                for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
  51                        if ( readl(addr++) != (unsigned long)-1) {
  52                                erased = 0;
  53                                break;
  54                        }
  55                }
  56
  57                /* Print the info */
  58                if ((i % 5) == 0)
  59                        printf ("\n   ");
  60                printf (" %08lX%s%s",
  61                        info->start[i],
  62                        erased ? " E" : "  ",
  63                        info->protect[i] ? "RO " : "   ");
  64        }
  65        printf ("\n");
  66}
  67
  68/*-------------------------------------------------------------------*/
  69
  70
  71int flash_erase (flash_info_t * info, int s_first, int s_last)
  72{
  73        unsigned char *addr = (unsigned char *) info->start[0];
  74        unsigned char *addr2;
  75        int prot, sect;
  76        ulong start;
  77
  78        /* Some sanity checking */
  79        if ((s_first < 0) || (s_first > s_last)) {
  80                printf ("- no sectors to erase\n");
  81                return 1;
  82        }
  83
  84        prot = 0;
  85        for (sect = s_first; sect <= s_last; ++sect) {
  86                if (info->protect[sect]) {
  87                        prot++;
  88                }
  89        }
  90        if (prot) {
  91                printf ("- Warning: %d protected sectors will not be erased!\n",
  92                        prot);
  93        } else {
  94                printf ("\n");
  95        }
  96
  97        /* It's ok to erase multiple sectors provided we don't delay more
  98         * than 50 usec between cmds ... at which point the erase time-out
  99         * occurs. So don't go and put printf() calls in the loop ... it
 100         * won't be very helpful ;-)
 101         */
 102        for (sect = s_first; sect <= s_last; sect++) {
 103                if (info->protect[sect] == 0) { /* not protected */
 104                        addr2 = (unsigned char *) info->start[sect];
 105                        writeb (0xaa, addr);
 106                        writeb (0x55, addr);
 107                        writeb (0x80, addr);
 108                        writeb (0xaa, addr);
 109                        writeb (0x55, addr);
 110                        writeb (0x30, addr2);
 111                        /* Now just wait for 0xff & provide some user
 112                         * feedback while we wait.
 113                         */
 114                        start = get_timer (0);
 115                        while ( readb (addr2) != 0xff) {
 116                                udelay (1000 * 1000);
 117                                putc ('.');
 118                                if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 119                                        printf ("timeout\n");
 120                                        return 1;
 121                                }
 122                        }
 123                }
 124        }
 125        printf ("\n");
 126        return 0;
 127}
 128
 129/*-----------------------------------------------------------------------
 130 * Copy memory to flash, returns:
 131 * 0 - OK
 132 * 1 - write timeout
 133 * 2 - Flash not erased
 134 */
 135
 136int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 137{
 138
 139        vu_char *cmd = (vu_char *) info->start[0];
 140        vu_char *dst = (vu_char *) addr;
 141        unsigned char b;
 142        ulong start;
 143
 144        while (cnt) {
 145                /* Check for sufficient erase */
 146                b = *src;
 147                if ((readb (dst) & b) != b) {
 148                        printf ("%02x : %02x\n", readb (dst), b);
 149                        return (2);
 150                }
 151
 152                writeb (0xaa, cmd);
 153                writeb (0x55, cmd);
 154                writeb (0xa0, cmd);
 155                writeb (dst, b);
 156
 157                /* Verify write */
 158                start = get_timer (0);
 159                while (readb (dst) != b) {
 160                        if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 161                                return 1;
 162                        }
 163                }
 164                dst++;
 165                src++;
 166                cnt--;
 167        }
 168
 169        return (0);
 170}
 171