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   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 uint8_t
  21 ao_storage_read(uint32_t pos, __xdata void *buf, uint16_t len) __reentrant
  22 {
  23         uint16_t this_len;
  24         uint16_t this_off;
  25
  26         ao_storage_setup();
  27         if (pos >= ao_storage_total || pos + len > ao_storage_total)
  28                 return 0;
  29         while (len) {
  30
  31                 /* Compute portion of transfer within
  32                  * a single block
  33                  */
  34                 this_off = (uint16_t) pos & (ao_storage_unit - 1);
  35                 this_len = ao_storage_unit - this_off;
  36                 if (this_len > len)
  37                         this_len = len;
  38
  39                 if (!ao_storage_device_read(pos, buf, this_len))
  40                         return 0;
  41
  42                 /* See how much is left */
  43                 buf += this_len;
  44                 len -= this_len;
  45                 pos += this_len;
  46         }
  47         return 1;
  48 }
  49
  50 uint8_t
  51 ao_storage_write(uint32_t pos, __xdata void *buf, uint16_t len) __reentrant
  52 {
  53         uint16_t this_len;
  54         uint16_t this_off;
  55
  56         ao_storage_setup();
  57         if (pos >= ao_storage_total || pos + len > ao_storage_total)
  58                 return 0;
  59         while (len) {
  60
  61                 /* Compute portion of transfer within
  62                  * a single block
  63                  */
  64                 this_off = (uint16_t) pos & (ao_storage_unit - 1);
  65                 this_len = ao_storage_unit - this_off;
  66                 if (this_len > len)
  67                         this_len = len;
  68
  69                 if (!ao_storage_device_write(pos, buf, this_len))
  70                         return 0;
  71
  72                 /* See how much is left */
  73                 buf += this_len;
  74                 len -= this_len;
  75                 pos += this_len;
  76         }
  77         return 1;
  78 }
  79
  80 static __xdata uint8_t storage_data[8];
  81
  82 static void
  83 ao_storage_dump(void) __reentrant
  84 {
  85         uint8_t i, j;
  86
  87         ao_cmd_hex();
  88         if (ao_cmd_status != ao_cmd_success)
  89                 return;
  90         for (i = 0; ; i += 8) {
  91                 if (ao_storage_read(((uint32_t) (ao_cmd_lex_i) << 8) + i,
  92                                   storage_data,
  93                                   8)) {
  94                         ao_cmd_put16((uint16_t) i);
  95                         for (j = 0; j < 7; j++) {
  96                                 putchar(' ');
  97                                 ao_cmd_put8(storage_data[j]);
  98                         }
  99                         putchar ('\n');
 100                 }
 101                 if (i == 248)
 102                         break;
 103         }
 104 }
 105
 106 static void
 107 ao_storage_store(void) __reentrant
 108 {
 109         uint16_t block;
 110         uint8_t i;
 111         uint16_t len;
 112         static __xdata uint8_t b;
 113         uint32_t addr;
 114
 115         ao_cmd_hex();
 116         block = ao_cmd_lex_i;
 117         ao_cmd_hex();
 118         i = ao_cmd_lex_i;
 119         addr = ((uint32_t) block << 8) | i;
 120         ao_cmd_hex();
 121         len = ao_cmd_lex_i;
 122         if (ao_cmd_status != ao_cmd_success)
 123                 return;
 124         while (len--) {
 125                 ao_cmd_hex();
 126                 if (ao_cmd_status != ao_cmd_success)
 127                         return;
 128                 b = ao_cmd_lex_i;
 129                 ao_storage_write(addr, &b, 1);
 130                 addr++;
 131         }
 132 }
 133
 134 void
 135 ao_storage_zap(void) __reentrant
 136 {
 137         ao_cmd_hex();
 138         if (ao_cmd_status != ao_cmd_success)
 139                 return;
 140         ao_storage_erase((uint32_t) ao_cmd_lex_i << 8);
 141 }
 142
 143 void
 144 ao_storage_info(void) __reentrant
 145 {
 146         printf("Storage size: %ld\n", ao_storage_total);
 147         printf("Storage erase unit: %ld\n", ao_storage_block);
 148         ao_storage_device_info();
 149 }
 150
 151 __code struct ao_cmds ao_storage_cmds[] = {
 152         { 'f', ao_storage_info, "f                                  Show storage info" },
 153         { 'e', ao_storage_dump, "e <block>                          Dump a block of flash data" },
 154         { 'w', ao_storage_store,"w <block> <start> <len> <data> ... Write data to flash" },
 155         { 'z', ao_storage_zap,  "z <block>                          Erase flash containing <block>" },
 156         { 0,   ao_storage_zap, NULL },
 157 };
 158
 159 void
 160 ao_storage_init(void)
 161 {
 162         ao_storage_device_init();
 163         ao_cmd_register(&ao_storage_cmds[0]);
 164 }