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   1 /*
   2  * Copyright © 2013 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; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include "ao-editaltos.h"
  22
  23 struct ao_sym ao_symbols[] = {
  24         [AO_ROMCONFIG_VERSION_INDEX] = {
  25                 .name = "ao_romconfig_version",
  26                 .required = 1
  27         },
  28         [AO_ROMCONFIG_CHECK_INDEX] = {
  29                 .name = "ao_romconfig_check",
  30                 .required = 1
  31         },
  32         [AO_SERIAL_NUMBER_INDEX] = {
  33                 .name = "ao_serial_number",
  34                 .required = 1
  35         },
  36         [AO_RADIO_CAL_INDEX] = {
  37                 .name = "ao_radio_cal",
  38                 .required = 0
  39         },
  40         [AO_USB_DESCRIPTORS_INDEX] = {
  41                 .name = "ao_usb_descriptors",
  42                 .required = 0
  43         },
  44 };
  45
  46 #define NUM_SYMBOLS             5
  47
  48 int ao_num_symbols = NUM_SYMBOLS;
  49
  50 /*
  51  * Edit the to-be-written memory block
  52  */
  53 static bool
  54 rewrite(struct ao_hex_image *load, unsigned address, uint8_t *data, int length)
  55 {
  56         if (address < load->address || load->address + load->length < address + length)
  57                 return false;
  58
  59         memcpy(&load->data[address - load->address], data, length);
  60         return true;
  61 }
  62
  63 /*
  64  * Find the symbols needed to correctly load the program
  65  */
  66
  67 bool
  68 ao_editaltos_find_symbols(struct ao_sym *file_symbols, int num_file_symbols,
  69                           struct ao_sym *symbols, int num_symbols)
  70 {
  71         int     f, s;
  72
  73         for (f = 0; f < num_file_symbols; f++) {
  74                 for (s = 0; s < num_symbols; s++) {
  75                         if (strcmp(symbols[s].name, file_symbols[f].name) == 0) {
  76                                 symbols[s].addr = file_symbols[f].addr;
  77                                 symbols[s].found = true;
  78                         }
  79                 }
  80         }
  81         for (s = 0; s < num_symbols; s++)
  82                 if (!symbols[s].found && symbols[s].required)
  83                         return false;
  84         return true;
  85 }
  86
  87 bool
  88 ao_editaltos(struct ao_hex_image *image,
  89              uint16_t serial,
  90              uint32_t cal)
  91 {
  92         uint8_t                 *serial_ucs2;
  93         int                     serial_ucs2_len;
  94         uint8_t                 serial_int[2];
  95         unsigned int            s;
  96         int                     i;
  97         int                     string_num;
  98         uint8_t                 cal_int[4];
  99
 100         /* Write the config values into the flash image
 101          */
 102
 103         serial_int[0] = serial & 0xff;
 104         serial_int[1] = (serial >> 8) & 0xff;
 105
 106         if (!rewrite(image, AO_SERIAL_NUMBER, serial_int, sizeof (serial_int))) {
 107                 fprintf(stderr, "Cannot rewrite serial integer at %08x\n",
 108                         AO_SERIAL_NUMBER);
 109                 return false;
 110         }
 111
 112         if (AO_USB_DESCRIPTORS) {
 113                 uint32_t        usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 114                 string_num = 0;
 115
 116                 while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 117                         if (image->data[usb_descriptors+1] == AO_USB_DESC_STRING) {
 118                                 ++string_num;
 119                                 if (string_num == 4)
 120                                         break;
 121                         }
 122                         usb_descriptors += image->data[usb_descriptors];
 123                 }
 124                 if (usb_descriptors >= image->length || image->data[usb_descriptors] == 0 ) {
 125                         fprintf(stderr, "Cannot rewrite serial string at %08x\n", AO_USB_DESCRIPTORS);
 126                         return false;
 127                 }
 128
 129                 serial_ucs2_len = image->data[usb_descriptors] - 2;
 130                 serial_ucs2 = malloc(serial_ucs2_len);
 131                 if (!serial_ucs2) {
 132                         fprintf(stderr, "Malloc(%d) failed\n", serial_ucs2_len);
 133                         return false;
 134                 }
 135                 s = serial;
 136                 for (i = serial_ucs2_len / 2; i; i--) {
 137                         serial_ucs2[i * 2 - 1] = 0;
 138                         serial_ucs2[i * 2 - 2] = (s % 10) + '0';
 139                         s /= 10;
 140                 }
 141                 if (!rewrite(image, usb_descriptors + 2 + image->address, serial_ucs2, serial_ucs2_len)) {
 142                         fprintf (stderr, "Cannot rewrite USB descriptor at %08x\n", AO_USB_DESCRIPTORS);
 143                         return false;
 144                 }
 145         }
 146
 147         if (cal && AO_RADIO_CAL) {
 148                 cal_int[0] = cal & 0xff;
 149                 cal_int[1] = (cal >> 8) & 0xff;
 150                 cal_int[2] = (cal >> 16) & 0xff;
 151                 cal_int[3] = (cal >> 24) & 0xff;
 152
 153                 if (!rewrite(image, AO_RADIO_CAL, cal_int, sizeof (cal_int))) {
 154                         fprintf(stderr, "Cannot rewrite radio calibration at %08x\n", AO_RADIO_CAL);
 155                         return false;
 156                 }
 157         }
 158         return true;
 159 }
 160
 161 static uint16_t
 162 read_le16(uint8_t *src)
 163 {
 164         return (uint16_t) src[0] | ((uint16_t) src[1] << 8);
 165 }
 166
 167 bool
 168 ao_heximage_usb_id(struct ao_hex_image *image, struct ao_usb_id *id)
 169 {
 170         uint32_t        usb_descriptors;
 171
 172         if (!AO_USB_DESCRIPTORS)
 173                 return false;
 174         usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 175
 176         while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 177                 if (image->data[usb_descriptors+1] == AO_USB_DESC_DEVICE) {
 178                         break;
 179                 }
 180                 usb_descriptors += image->data[usb_descriptors];
 181         }
 182
 183         /*
 184          * check to make sure there's at least 0x12 (size of a USB
 185          * device descriptor) available
 186          */
 187         if (usb_descriptors >= image->length || image->data[usb_descriptors] != 0x12)
 188                 return false;
 189
 190         id->vid = read_le16(image->data + usb_descriptors + 8);
 191         id->pid = read_le16(image->data + usb_descriptors + 10);
 192
 193         return true;
 194 }
 195
 196 uint16_t *
 197 ao_heximage_usb_product(struct ao_hex_image *image)
 198 {
 199         uint32_t        usb_descriptors;
 200         int             string_num;
 201         uint16_t        *product;
 202         uint8_t         product_len;
 203
 204         if (!AO_USB_DESCRIPTORS)
 205                 return NULL;
 206         usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 207
 208         string_num = 0;
 209         while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 210                 if (image->data[usb_descriptors+1] == AO_USB_DESC_STRING) {
 211                         ++string_num;
 212                         if (string_num == 3)
 213                                 break;
 214                 }
 215                 usb_descriptors += image->data[usb_descriptors];
 216         }
 217
 218         /*
 219          * check to make sure there's at least 0x12 (size of a USB
 220          * device descriptor) available
 221          */
 222         if (usb_descriptors >= image->length || image->data[usb_descriptors] == 0)
 223                 return NULL;
 224
 225         product_len = image->data[usb_descriptors] - 2;
 226
 227         if (usb_descriptors < product_len + 2)
 228                 return NULL;
 229
 230         product = malloc (product_len + 2);
 231         if (!product)
 232                 return NULL;
 233
 234         memcpy(product, image->data + usb_descriptors + 2, product_len);
 235         product[product_len/2] = 0;
 236         return product;
 237 }