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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 #include <ao_storage.h>
  20
  21 uint8_t
  22 ao_storage_read(ao_pos_t pos, __xdata void *buf, uint16_t len) __reentrant
  23 {
  24         uint16_t this_len;
  25         uint16_t this_off;
  26
  27         ao_storage_setup();
  28         if (pos >= ao_storage_total || pos + len > ao_storage_total)
  29                 return 0;
  30         while (len) {
  31
  32                 /* Compute portion of transfer within
  33                  * a single block
  34                  */
  35                 this_off = (uint16_t) pos & (ao_storage_unit - 1);
  36                 this_len = ao_storage_unit - this_off;
  37                 if (this_len > len)
  38                         this_len = len;
  39
  40                 if (!ao_storage_device_read(pos, buf, this_len))
  41                         return 0;
  42
  43                 /* See how much is left */
  44                 buf += this_len;
  45                 len -= this_len;
  46                 pos += this_len;
  47         }
  48         return 1;
  49 }
  50
  51 uint8_t
  52 ao_storage_write(ao_pos_t pos, __xdata void *buf, uint16_t len) __reentrant
  53 {
  54         uint16_t this_len;
  55         uint16_t this_off;
  56
  57         ao_storage_setup();
  58         if (pos >= ao_storage_total || pos + len > ao_storage_total)
  59                 return 0;
  60         while (len) {
  61
  62                 /* Compute portion of transfer within
  63                  * a single block
  64                  */
  65                 this_off = (uint16_t) pos & (ao_storage_unit - 1);
  66                 this_len = ao_storage_unit - this_off;
  67                 if (this_len > len)
  68                         this_len = len;
  69
  70                 if (!ao_storage_device_write(pos, buf, this_len))
  71                         return 0;
  72
  73                 /* See how much is left */
  74                 buf += this_len;
  75                 len -= this_len;
  76                 pos += this_len;
  77         }
  78         return 1;
  79 }
  80
  81 static __xdata uint8_t storage_data[8];
  82
  83 static void
  84 ao_storage_dump(void) __reentrant
  85 {
  86         uint8_t i, j;
  87
  88         ao_cmd_hex();
  89         if (ao_cmd_status != ao_cmd_success)
  90                 return;
  91         for (i = 0; ; i += 8) {
  92                 if (ao_storage_read(((uint32_t) (ao_cmd_lex_i) << 8) + i,
  93                                   storage_data,
  94                                   8)) {
  95                         ao_cmd_put16((uint16_t) i);
  96                         for (j = 0; j < 8; j++) {
  97                                 putchar(' ');
  98                                 ao_cmd_put8(storage_data[j]);
  99                         }
 100                         putchar ('\n');
 101                 }
 102                 if (i == 248)
 103                         break;
 104         }
 105 }
 106
 107 #if HAS_STORAGE_DEBUG
 108
 109 /* not enough space for this today
 110  */
 111 static void
 112 ao_storage_store(void) __reentrant
 113 {
 114         uint16_t block;
 115         uint8_t i;
 116         uint16_t len;
 117         static __xdata uint8_t b;
 118         uint32_t addr;
 119
 120         ao_cmd_hex();
 121         block = ao_cmd_lex_i;
 122         ao_cmd_hex();
 123         i = ao_cmd_lex_i;
 124         addr = ((uint32_t) block << 8) | i;
 125         ao_cmd_hex();
 126         len = ao_cmd_lex_i;
 127         if (ao_cmd_status != ao_cmd_success)
 128                 return;
 129         while (len--) {
 130                 ao_cmd_hex();
 131                 if (ao_cmd_status != ao_cmd_success)
 132                         return;
 133                 b = ao_cmd_lex_i;
 134                 ao_storage_write(addr, &b, 1);
 135                 addr++;
 136         }
 137 }
 138 #endif
 139
 140 void
 141 ao_storage_zap(void) __reentrant
 142 {
 143         ao_cmd_hex();
 144         if (ao_cmd_status != ao_cmd_success)
 145                 return;
 146         ao_storage_erase((uint32_t) ao_cmd_lex_i << 8);
 147 }
 148
 149 void
 150 ao_storage_zapall(void) __reentrant
 151 {
 152         uint32_t        pos;
 153
 154         ao_cmd_white();
 155         if (!ao_match_word("DoIt"))
 156                 return;
 157         for (pos = 0; pos < ao_storage_config; pos += ao_storage_block)
 158                 ao_storage_erase(pos);
 159 }
 160
 161 void
 162 ao_storage_info(void) __reentrant
 163 {
 164         ao_storage_setup();
 165         printf("Storage size: %ld\n", (long) ao_storage_total);
 166         printf("Storage erase unit: %ld\n", (long) ao_storage_block);
 167         ao_storage_device_info();
 168 }
 169
 170 __code struct ao_cmds ao_storage_cmds[] = {
 171         { ao_storage_info, "f\0Show storage" },
 172         { ao_storage_dump, "e <block>\0Dump flash" },
 173 #if HAS_STORAGE_DEBUG
 174         { ao_storage_store, "w <block> <start> <len> <data> ...\0Write data to flash" },
 175 #endif
 176         { ao_storage_zap, "z <block>\0Erase <block>" },
 177         { ao_storage_zapall,"Z <key>\0Erase all. <key> is doit with D&I" },
 178         { 0, NULL },
 179 };
 180
 181 void
 182 ao_storage_init(void)
 183 {
 184         ao_storage_device_init();
 185         ao_cmd_register(&ao_storage_cmds[0]);
 186 }