board/siemens/common/factoryset.c

   1 /*
   2  *
   3  * Read FactorySet information from EEPROM into global structure.
   4  * (C) Copyright 2013 Siemens Schweiz AG
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #if !defined(CONFIG_SPL_BUILD)
  10
  11 #include <common.h>
  12 #include <i2c.h>
  13 #include <asm/io.h>
  14 #include <asm/arch/cpu.h>
  15 #include <asm/arch/sys_proto.h>
  16 #include <asm/unaligned.h>
  17 #include <net.h>
  18 #include <errno.h>
  19 #include <g_dnl.h>
  20 #include "factoryset.h"
  21
  22 #define EEPR_PG_SZ              0x80
  23 #define EEPROM_FATORYSET_OFFSET 0x400
  24 #define OFF_PG            EEPROM_FATORYSET_OFFSET/EEPR_PG_SZ
  25
  26 /* Global variable that contains necessary information from FactorySet */
  27 struct factorysetcontainer factory_dat;
  28
  29 #define fact_get_char(i) *((char *)&eeprom_buf[i])
  30
  31 static int fact_match(unsigned char *eeprom_buf, uchar *s1, int i2)
  32 {
  33         if (s1 == NULL)
  34                 return -1;
  35
  36         while (*s1 == fact_get_char(i2++))
  37                 if (*s1++ == '=')
  38                         return i2;
  39
  40         if (*s1 == '\0' && fact_get_char(i2-1) == '=')
  41                 return i2;
  42
  43         return -1;
  44 }
  45
  46 static int get_factory_val(unsigned char *eeprom_buf, int size, uchar *name,
  47                         uchar *buf, int len)
  48 {
  49         int i, nxt = 0;
  50
  51         for (i = 0; fact_get_char(i) != '\0'; i = nxt + 1) {
  52                 int val, n;
  53
  54                 for (nxt = i; fact_get_char(nxt) != '\0'; ++nxt) {
  55                         if (nxt >= size)
  56                                 return -1;
  57                 }
  58
  59                 val = fact_match(eeprom_buf, (uchar *)name, i);
  60                 if (val < 0)
  61                         continue;
  62
  63                 /* found; copy out */
  64                 for (n = 0; n < len; ++n, ++buf) {
  65                         *buf = fact_get_char(val++);
  66                         if (*buf == '\0')
  67                                 return n;
  68                 }
  69
  70                 if (n)
  71                         *--buf = '\0';
  72
  73                 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
  74                        len, name);
  75
  76                 return n;
  77         }
  78         return -1;
  79 }
  80
  81 static
  82 int get_factory_record_val(unsigned char *eeprom_buf, int size, uchar *record,
  83         uchar *name, uchar *buf, int len)
  84 {
  85         int ret = -1;
  86         int i, nxt = 0;
  87         int c;
  88         unsigned char end = 0xff;
  89         unsigned char tmp;
  90
  91         for (i = 0; fact_get_char(i) != end; i = nxt) {
  92                 nxt = i + 1;
  93                 if (fact_get_char(i) == '>') {
  94                         int pos;
  95                         int endpos;
  96                         int z;
  97                         int level = 0;
  98
  99                         c = strncmp((char *)&eeprom_buf[i + 1], (char *)record,
 100                                     strlen((char *)record));
 101                         if (c == 0) {
 102                                 /* record found */
 103                                 pos = i + strlen((char *)record) + 2;
 104                                 nxt = pos;
 105                                 /* search for "<" */
 106                                 c = -1;
 107                                 for (z = pos; fact_get_char(z) != end; z++) {
 108                                         if (fact_get_char(z) == '<') {
 109                                                 if (level == 0) {
 110                                                         endpos = z;
 111                                                         nxt = endpos;
 112                                                         c = 0;
 113                                                         break;
 114                                                 } else {
 115                                                         level--;
 116                                                 }
 117                                         }
 118                                         if (fact_get_char(z) == '>')
 119                                                 level++;
 120                                 }
 121                         } else {
 122                                 continue;
 123                         }
 124                         if (c == 0) {
 125                                 /* end found -> call get_factory_val */
 126                                 tmp = eeprom_buf[endpos];
 127                                 eeprom_buf[endpos] = end;
 128                                 ret = get_factory_val(&eeprom_buf[pos],
 129                                         endpos - pos, name, buf, len);
 130                                 /* fix buffer */
 131                                 eeprom_buf[endpos] = tmp;
 132                                 debug("%s: %s.%s = %s\n",
 133                                       __func__, record, name, buf);
 134                                 return ret;
 135                         }
 136                 }
 137         }
 138         return ret;
 139 }
 140
 141 int factoryset_read_eeprom(int i2c_addr)
 142 {
 143         int i, pages = 0, size = 0;
 144         unsigned char eeprom_buf[0x3c00], hdr[4], buf[MAX_STRING_LENGTH];
 145         unsigned char *cp, *cp1;
 146
 147 #if defined(CONFIG_DFU_OVER_USB)
 148         factory_dat.usb_vendor_id = CONFIG_USB_GADGET_VENDOR_NUM;
 149         factory_dat.usb_product_id = CONFIG_USB_GADGET_PRODUCT_NUM;
 150 #endif
 151         if (i2c_probe(i2c_addr))
 152                 goto err;
 153
 154         if (i2c_read(i2c_addr, EEPROM_FATORYSET_OFFSET, 2, hdr, sizeof(hdr)))
 155                 goto err;
 156
 157         if ((hdr[0] != 0x99) || (hdr[1] != 0x80)) {
 158                 printf("FactorySet is not right in eeprom.\n");
 159                 return 1;
 160         }
 161
 162         /* get FactorySet size */
 163         size = (hdr[2] << 8) + hdr[3] + sizeof(hdr);
 164         if (size > 0x3bfa)
 165                 size = 0x3bfa;
 166
 167         pages = size / EEPR_PG_SZ;
 168
 169         /*
 170          * read the eeprom using i2c
 171          * I can not read entire eeprom in once, so separate into several
 172          * times. Furthermore, fetch eeprom take longer time, so we fetch
 173          * data after every time we got a record from eeprom
 174          */
 175         debug("Read eeprom page :\n");
 176         for (i = 0; i < pages; i++)
 177                 if (i2c_read(i2c_addr, (OFF_PG + i) * EEPR_PG_SZ, 2,
 178                              eeprom_buf + (i * EEPR_PG_SZ), EEPR_PG_SZ))
 179                         goto err;
 180
 181         if (size % EEPR_PG_SZ)
 182                 if (i2c_read(i2c_addr, (OFF_PG + pages) * EEPR_PG_SZ, 2,
 183                              eeprom_buf + (pages * EEPR_PG_SZ),
 184                              (size % EEPR_PG_SZ)))
 185                         goto err;
 186
 187         /* we do below just for eeprom align */
 188         for (i = 0; i < size; i++)
 189                 if (eeprom_buf[i] == '\n')
 190                         eeprom_buf[i] = 0;
 191
 192         /* skip header */
 193         size -= sizeof(hdr);
 194         cp = (uchar *)eeprom_buf + sizeof(hdr);
 195
 196         /* get mac address */
 197         get_factory_record_val(cp, size, (uchar *)"ETH1", (uchar *)"mac",
 198                                buf, MAX_STRING_LENGTH);
 199         cp1 = buf;
 200         for (i = 0; i < 6; i++) {
 201                 factory_dat.mac[i] = simple_strtoul((char *)cp1, NULL, 16);
 202                 cp1 += 3;
 203         }
 204
 205 #if defined(CONFIG_DFU_OVER_USB)
 206         /* read vid and pid for dfu mode */
 207         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 208                                         (uchar *)"vid", buf,
 209                                         MAX_STRING_LENGTH)) {
 210                 factory_dat.usb_vendor_id = simple_strtoul((char *)buf,
 211                                                            NULL, 16);
 212         }
 213
 214         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 215                                         (uchar *)"pid", buf,
 216                                         MAX_STRING_LENGTH)) {
 217                 factory_dat.usb_product_id = simple_strtoul((char *)buf,
 218                                                             NULL, 16);
 219         }
 220         printf("DFU USB: VID = 0x%4x, PID = 0x%4x\n", factory_dat.usb_vendor_id,
 221                factory_dat.usb_product_id);
 222 #endif
 223 #if defined(CONFIG_VIDEO)
 224         if (0 <= get_factory_record_val(cp, size, (uchar *)"DISP1",
 225                                         (uchar *)"name", factory_dat.disp_name,
 226                                         MAX_STRING_LENGTH)) {
 227                 debug("display name: %s\n", factory_dat.disp_name);
 228         }
 229 #endif
 230         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 231                                         (uchar *)"num", factory_dat.serial,
 232                                         MAX_STRING_LENGTH)) {
 233                 debug("serial number: %s\n", factory_dat.serial);
 234         }
 235         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 236                                         (uchar *)"ver", buf,
 237                                         MAX_STRING_LENGTH)) {
 238                 factory_dat.version = simple_strtoul((char *)buf,
 239                                                             NULL, 16);
 240                 debug("version number: %d\n", factory_dat.version);
 241         }
 242         /* Get ASN from factory set if available */
 243         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 244                                         (uchar *)"id", factory_dat.asn,
 245                                         MAX_STRING_LENGTH)) {
 246                 debug("factoryset asn: %s\n", factory_dat.asn);
 247         } else {
 248                 factory_dat.asn[0] = 0;
 249         }
 250         /* Get COMP/ver from factory set if available */
 251         if (0 <= get_factory_record_val(cp, size, (uchar *)"COMP",
 252                                         (uchar *)"ver",
 253                                         factory_dat.comp_version,
 254                                         MAX_STRING_LENGTH)) {
 255                 debug("factoryset COMP/ver: %s\n", factory_dat.comp_version);
 256         } else {
 257                 strcpy((char *)factory_dat.comp_version, "1.0");
 258         }
 259
 260         return 0;
 261
 262 err:
 263         printf("Could not read the EEPROM; something fundamentally wrong on the I2C bus.\n");
 264         return 1;
 265 }
 266
 267 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
 268
 269 static int factoryset_mac_env_set(void)
 270 {
 271         uint8_t mac_addr[6];
 272
 273         debug("FactorySet: Set mac address\n");
 274         if (is_valid_ethaddr(factory_dat.mac)) {
 275                 memcpy(mac_addr, factory_dat.mac, 6);
 276         } else {
 277                 uint32_t mac_hi, mac_lo;
 278
 279                 debug("Warning: FactorySet: <ethaddr> not set. Fallback to E-fuse\n");
 280                 mac_lo = readl(&cdev->macid0l);
 281                 mac_hi = readl(&cdev->macid0h);
 282
 283                 mac_addr[0] = mac_hi & 0xFF;
 284                 mac_addr[1] = (mac_hi & 0xFF00) >> 8;
 285                 mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
 286                 mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
 287                 mac_addr[4] = mac_lo & 0xFF;
 288                 mac_addr[5] = (mac_lo & 0xFF00) >> 8;
 289                 if (!is_valid_ethaddr(mac_addr)) {
 290                         printf("Warning: ethaddr not set by FactorySet or E-fuse. Set <ethaddr> variable to overcome this.\n");
 291                         return -1;
 292                 }
 293         }
 294
 295         eth_env_set_enetaddr("ethaddr", mac_addr);
 296         return 0;
 297 }
 298
 299 int factoryset_env_set(void)
 300 {
 301         int ret = 0;
 302
 303         if (factoryset_mac_env_set() < 0)
 304                 ret = -1;
 305
 306         return ret;
 307 }
 308
 309 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 310 {
 311         put_unaligned(factory_dat.usb_vendor_id, &dev->idVendor);
 312         put_unaligned(factory_dat.usb_product_id, &dev->idProduct);
 313         g_dnl_set_serialnumber((char *)factory_dat.serial);
 314
 315         return 0;
 316 }
 317
 318 int g_dnl_get_board_bcd_device_number(int gcnum)
 319 {
 320         return factory_dat.version;
 321 }
 322 #endif /* defined(CONFIG_SPL_BUILD) */