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#if defined(CONFIG_NIOS)
  11#include <nios.h>
  12#else
  13#include <asm/io.h>
  14#endif
  15
  16#define SECTSZ          (64 * 1024)
  17flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  18
  19/*----------------------------------------------------------------------*/
  20unsigned long flash_init (void)
  21{
  22        int i;
  23        unsigned long addr;
  24        flash_info_t *fli = &flash_info[0];
  25
  26        fli->size = CONFIG_SYS_FLASH_SIZE;
  27        fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  28        fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  29
  30        addr = CONFIG_SYS_FLASH_BASE;
  31        for (i = 0; i < fli->sector_count; ++i) {
  32                fli->start[i] = addr;
  33                addr += SECTSZ;
  34                fli->protect[i] = 1;
  35        }
  36
  37        return (CONFIG_SYS_FLASH_SIZE);
  38}
  39/*--------------------------------------------------------------------*/
  40void flash_print_info (flash_info_t * info)
  41{
  42        int i, k;
  43        int erased;
  44        unsigned long *addr;
  45
  46        printf ("  Size: %ld KB in %d Sectors\n",
  47                info->size >> 10, info->sector_count);
  48        printf ("  Sector Start Addresses:");
  49        for (i = 0; i < info->sector_count; ++i) {
  50
  51                /* Check if whole sector is erased */
  52                erased = 1;
  53                addr = (unsigned long *) info->start[i];
  54                for (k = 0; k < SECTSZ/sizeof(unsigned long); k++) {
  55                        if ( readl(addr++) != (unsigned long)-1) {
  56                                erased = 0;
  57                                break;
  58                        }
  59                }
  60
  61                /* Print the info */
  62                if ((i % 5) == 0)
  63                        printf ("\n   ");
  64                printf (" %08lX%s%s",
  65                        info->start[i],
  66                        erased ? " E" : "  ",
  67                        info->protect[i] ? "RO " : "   ");
  68        }
  69        printf ("\n");
  70}
  71
  72/*-------------------------------------------------------------------*/
  73
  74
  75int flash_erase (flash_info_t * info, int s_first, int s_last)
  76{
  77        unsigned char *addr = (unsigned char *) info->start[0];
  78        unsigned char *addr2;
  79        int prot, sect;
  80        ulong start;
  81
  82        /* Some sanity checking */
  83        if ((s_first < 0) || (s_first > s_last)) {
  84                printf ("- no sectors to erase\n");
  85                return 1;
  86        }
  87
  88        prot = 0;
  89        for (sect = s_first; sect <= s_last; ++sect) {
  90                if (info->protect[sect]) {
  91                        prot++;
  92                }
  93        }
  94        if (prot) {
  95                printf ("- Warning: %d protected sectors will not be erased!\n",
  96                        prot);
  97        } else {
  98                printf ("\n");
  99        }
 100
 101        /* It's ok to erase multiple sectors provided we don't delay more
 102         * than 50 usec between cmds ... at which point the erase time-out
 103         * occurs. So don't go and put printf() calls in the loop ... it
 104         * won't be very helpful ;-)
 105         */
 106        for (sect = s_first; sect <= s_last; sect++) {
 107                if (info->protect[sect] == 0) { /* not protected */
 108                        addr2 = (unsigned char *) info->start[sect];
 109                        writeb (0xaa, addr);
 110                        writeb (0x55, addr);
 111                        writeb (0x80, addr);
 112                        writeb (0xaa, addr);
 113                        writeb (0x55, addr);
 114                        writeb (0x30, addr2);
 115                        /* Now just wait for 0xff & provide some user
 116                         * feedback while we wait.
 117                         */
 118                        start = get_timer (0);
 119                        while ( readb (addr2) != 0xff) {
 120                                udelay (1000 * 1000);
 121                                putc ('.');
 122                                if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 123                                        printf ("timeout\n");
 124                                        return 1;
 125                                }
 126                        }
 127                }
 128        }
 129        printf ("\n");
 130        return 0;
 131}
 132
 133/*-----------------------------------------------------------------------
 134 * Copy memory to flash, returns:
 135 * 0 - OK
 136 * 1 - write timeout
 137 * 2 - Flash not erased
 138 */
 139
 140int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 141{
 142
 143        vu_char *cmd = (vu_char *) info->start[0];
 144        vu_char *dst = (vu_char *) addr;
 145        unsigned char b;
 146        ulong start;
 147
 148        while (cnt) {
 149                /* Check for sufficient erase */
 150                b = *src;
 151                if ((readb (dst) & b) != b) {
 152                        printf ("%02x : %02x\n", readb (dst), b);
 153                        return (2);
 154                }
 155
 156                writeb (0xaa, cmd);
 157                writeb (0x55, cmd);
 158                writeb (0xa0, cmd);
 159                writeb (dst, b);
 160
 161                /* Verify write */
 162                start = get_timer (0);
 163                while (readb (dst) != b) {
 164                        if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 165                                return 1;
 166                        }
 167                }
 168                dst++;
 169                src++;
 170                cnt--;
 171        }
 172
 173        return (0);
 174}
 175