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
  90         for (i = 0; fact_get_char(i) != end; i = nxt) {
  91                 nxt = i + 1;
  92                 if (fact_get_char(i) == '>') {
  93                         int pos;
  94                         int endpos;
  95                         int z;
  96
  97                         c = strncmp((char *)&eeprom_buf[i + 1], (char *)record,
  98                                     strlen((char *)record));
  99                         if (c == 0) {
 100                                 /* record found */
 101                                 pos = i + strlen((char *)record) + 2;
 102                                 nxt = pos;
 103                                 /* search for "<" */
 104                                 c = -1;
 105                                 for (z = pos; fact_get_char(z) != end; z++) {
 106                                         if ((fact_get_char(z) == '<')  ||
 107                                             (fact_get_char(z) == '>')) {
 108                                                 endpos = z;
 109                                                 nxt = endpos;
 110                                                 c = 0;
 111                                                 break;
 112                                         }
 113                                 }
 114                         }
 115                         if (c == 0) {
 116                                 /* end found -> call get_factory_val */
 117                                 eeprom_buf[endpos] = end;
 118                                 ret = get_factory_val(&eeprom_buf[pos],
 119                                         size - pos, name, buf, len);
 120                                 /* fix buffer */
 121                                 eeprom_buf[endpos] = '<';
 122                                 debug("%s: %s.%s = %s\n",
 123                                       __func__, record, name, buf);
 124                                 return ret;
 125                         }
 126                 }
 127         }
 128         return ret;
 129 }
 130
 131 int factoryset_read_eeprom(int i2c_addr)
 132 {
 133         int i, pages = 0, size = 0;
 134         unsigned char eeprom_buf[0x3c00], hdr[4], buf[MAX_STRING_LENGTH];
 135         unsigned char *cp, *cp1;
 136
 137 #if defined(CONFIG_DFU_FUNCTION)
 138         factory_dat.usb_vendor_id = CONFIG_G_DNL_VENDOR_NUM;
 139         factory_dat.usb_product_id = CONFIG_G_DNL_PRODUCT_NUM;
 140 #endif
 141         if (i2c_probe(i2c_addr))
 142                 goto err;
 143
 144         if (i2c_read(i2c_addr, EEPROM_FATORYSET_OFFSET, 2, hdr, sizeof(hdr)))
 145                 goto err;
 146
 147         if ((hdr[0] != 0x99) || (hdr[1] != 0x80)) {
 148                 printf("FactorySet is not right in eeprom.\n");
 149                 return 1;
 150         }
 151
 152         /* get FactorySet size */
 153         size = (hdr[2] << 8) + hdr[3] + sizeof(hdr);
 154         if (size > 0x3bfa)
 155                 size = 0x3bfa;
 156
 157         pages = size / EEPR_PG_SZ;
 158
 159         /*
 160          * read the eeprom using i2c
 161          * I can not read entire eeprom in once, so separate into several
 162          * times. Furthermore, fetch eeprom take longer time, so we fetch
 163          * data after every time we got a record from eeprom
 164          */
 165         debug("Read eeprom page :\n");
 166         for (i = 0; i < pages; i++)
 167                 if (i2c_read(i2c_addr, (OFF_PG + i) * EEPR_PG_SZ, 2,
 168                              eeprom_buf + (i * EEPR_PG_SZ), EEPR_PG_SZ))
 169                         goto err;
 170
 171         if (size % EEPR_PG_SZ)
 172                 if (i2c_read(i2c_addr, (OFF_PG + pages) * EEPR_PG_SZ, 2,
 173                              eeprom_buf + (pages * EEPR_PG_SZ),
 174                              (size % EEPR_PG_SZ)))
 175                         goto err;
 176
 177         /* we do below just for eeprom align */
 178         for (i = 0; i < size; i++)
 179                 if (eeprom_buf[i] == '\n')
 180                         eeprom_buf[i] = 0;
 181
 182         /* skip header */
 183         size -= sizeof(hdr);
 184         cp = (uchar *)eeprom_buf + sizeof(hdr);
 185
 186         /* get mac address */
 187         get_factory_record_val(cp, size, (uchar *)"ETH1", (uchar *)"mac",
 188                                buf, MAX_STRING_LENGTH);
 189         cp1 = buf;
 190         for (i = 0; i < 6; i++) {
 191                 factory_dat.mac[i] = simple_strtoul((char *)cp1, NULL, 16);
 192                 cp1 += 3;
 193         }
 194
 195 #if defined(CONFIG_DFU_FUNCTION)
 196         /* read vid and pid for dfu mode */
 197         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 198                                         (uchar *)"vid", buf,
 199                                         MAX_STRING_LENGTH)) {
 200                 factory_dat.usb_vendor_id = simple_strtoul((char *)buf,
 201                                                            NULL, 16);
 202         }
 203
 204         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 205                                         (uchar *)"pid", buf,
 206                                         MAX_STRING_LENGTH)) {
 207                 factory_dat.usb_product_id = simple_strtoul((char *)buf,
 208                                                             NULL, 16);
 209         }
 210         printf("DFU USB: VID = 0x%4x, PID = 0x%4x\n", factory_dat.usb_vendor_id,
 211                factory_dat.usb_product_id);
 212 #endif
 213         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 214                                         (uchar *)"id", buf,
 215                                         MAX_STRING_LENGTH)) {
 216                 if (strncmp((const char *)buf, "PXM50", 5) == 0)
 217                         factory_dat.pxm50 = 1;
 218                 else
 219                         factory_dat.pxm50 = 0;
 220         }
 221         debug("PXM50: %d\n", factory_dat.pxm50);
 222 #if defined(CONFIG_VIDEO)
 223         if (0 <= get_factory_record_val(cp, size, (uchar *)"DISP1",
 224                                         (uchar *)"name", factory_dat.disp_name,
 225                                         MAX_STRING_LENGTH)) {
 226                 debug("display name: %s\n", factory_dat.disp_name);
 227         }
 228 #endif
 229         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 230                                         (uchar *)"num", factory_dat.serial,
 231                                         MAX_STRING_LENGTH)) {
 232                 debug("serial number: %s\n", factory_dat.serial);
 233         }
 234         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 235                                         (uchar *)"ver", buf,
 236                                         MAX_STRING_LENGTH)) {
 237                 factory_dat.version = simple_strtoul((char *)buf,
 238                                                             NULL, 16);
 239                 debug("version number: %d\n", factory_dat.version);
 240         }
 241
 242         return 0;
 243
 244 err:
 245         printf("Could not read the EEPROM; something fundamentally wrong on the I2C bus.\n");
 246         return 1;
 247 }
 248
 249 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
 250
 251 static int factoryset_mac_setenv(void)
 252 {
 253         uint8_t mac_addr[6];
 254
 255         debug("FactorySet: Set mac address\n");
 256         if (is_valid_ether_addr(factory_dat.mac)) {
 257                 memcpy(mac_addr, factory_dat.mac, 6);
 258         } else {
 259                 uint32_t mac_hi, mac_lo;
 260
 261                 debug("Warning: FactorySet: <ethaddr> not set. Fallback to E-fuse\n");
 262                 mac_lo = readl(&cdev->macid0l);
 263                 mac_hi = readl(&cdev->macid0h);
 264
 265                 mac_addr[0] = mac_hi & 0xFF;
 266                 mac_addr[1] = (mac_hi & 0xFF00) >> 8;
 267                 mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
 268                 mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
 269                 mac_addr[4] = mac_lo & 0xFF;
 270                 mac_addr[5] = (mac_lo & 0xFF00) >> 8;
 271                 if (!is_valid_ether_addr(mac_addr)) {
 272                         printf("Warning: ethaddr not set by FactorySet or E-fuse. Set <ethaddr> variable to overcome this.\n");
 273                         return -1;
 274                 }
 275         }
 276
 277         eth_setenv_enetaddr("ethaddr", mac_addr);
 278         return 0;
 279 }
 280
 281 int factoryset_setenv(void)
 282 {
 283         int ret = 0;
 284
 285         if (factoryset_mac_setenv() < 0)
 286                 ret = -1;
 287
 288         return ret;
 289 }
 290
 291 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 292 {
 293         put_unaligned(factory_dat.usb_vendor_id, &dev->idVendor);
 294         put_unaligned(factory_dat.usb_product_id, &dev->idProduct);
 295         g_dnl_set_serialnumber((char *)factory_dat.serial);
 296
 297         return 0;
 298 }
 299
 300 int g_dnl_get_board_bcd_device_number(int gcnum)
 301 {
 302         return factory_dat.version;
 303 }
 304 #endif /* defined(CONFIG_SPL_BUILD) */