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 <usbdescriptors.h>
  19 #include "factoryset.h"
  20
  21 #define EEPR_PG_SZ              0x80
  22 #define EEPROM_FATORYSET_OFFSET 0x400
  23 #define OFF_PG            EEPROM_FATORYSET_OFFSET/EEPR_PG_SZ
  24
  25 /* Global variable that contains necessary information from FactorySet */
  26 struct factorysetcontainer factory_dat;
  27
  28 #define fact_get_char(i) *((char *)&eeprom_buf[i])
  29
  30 static int fact_match(unsigned char *eeprom_buf, uchar *s1, int i2)
  31 {
  32         if (s1 == NULL)
  33                 return -1;
  34
  35         while (*s1 == fact_get_char(i2++))
  36                 if (*s1++ == '=')
  37                         return i2;
  38
  39         if (*s1 == '\0' && fact_get_char(i2-1) == '=')
  40                 return i2;
  41
  42         return -1;
  43 }
  44
  45 static int get_factory_val(unsigned char *eeprom_buf, int size, uchar *name,
  46                         uchar *buf, int len)
  47 {
  48         int i, nxt = 0;
  49
  50         for (i = 0; fact_get_char(i) != '\0'; i = nxt + 1) {
  51                 int val, n;
  52
  53                 for (nxt = i; fact_get_char(nxt) != '\0'; ++nxt) {
  54                         if (nxt >= size)
  55                                 return -1;
  56                 }
  57
  58                 val = fact_match(eeprom_buf, (uchar *)name, i);
  59                 if (val < 0)
  60                         continue;
  61
  62                 /* found; copy out */
  63                 for (n = 0; n < len; ++n, ++buf) {
  64                         *buf = fact_get_char(val++);
  65                         if (*buf == '\0')
  66                                 return n;
  67                 }
  68
  69                 if (n)
  70                         *--buf = '\0';
  71
  72                 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
  73                        len, name);
  74
  75                 return n;
  76         }
  77         return -1;
  78 }
  79
  80 static
  81 int get_factory_record_val(unsigned char *eeprom_buf, int size, uchar *record,
  82         uchar *name, uchar *buf, int len)
  83 {
  84         int ret = -1;
  85         int i, nxt = 0;
  86         int c;
  87         unsigned char end = 0xff;
  88
  89         for (i = 0; fact_get_char(i) != end; i = nxt) {
  90                 nxt = i + 1;
  91                 if (fact_get_char(i) == '>') {
  92                         int pos;
  93                         int endpos;
  94                         int z;
  95
  96                         c = strncmp((char *)&eeprom_buf[i + 1], (char *)record,
  97                                     strlen((char *)record));
  98                         if (c == 0) {
  99                                 /* record found */
 100                                 pos = i + strlen((char *)record) + 2;
 101                                 nxt = pos;
 102                                 /* search for "<" */
 103                                 c = -1;
 104                                 for (z = pos; fact_get_char(z) != end; z++) {
 105                                         if ((fact_get_char(z) == '<')  ||
 106                                             (fact_get_char(z) == '>')) {
 107                                                 endpos = z;
 108                                                 nxt = endpos;
 109                                                 c = 0;
 110                                                 break;
 111                                         }
 112                                 }
 113                         }
 114                         if (c == 0) {
 115                                 /* end found -> call get_factory_val */
 116                                 eeprom_buf[endpos] = end;
 117                                 ret = get_factory_val(&eeprom_buf[pos],
 118                                         size - pos, name, buf, len);
 119                                 /* fix buffer */
 120                                 eeprom_buf[endpos] = '<';
 121                                 debug("%s: %s.%s = %s\n",
 122                                       __func__, record, name, buf);
 123                                 return ret;
 124                         }
 125                 }
 126         }
 127         return ret;
 128 }
 129
 130 int factoryset_read_eeprom(int i2c_addr)
 131 {
 132         int i, pages = 0, size = 0;
 133         unsigned char eeprom_buf[0x3c00], hdr[4], buf[MAX_STRING_LENGTH];
 134         unsigned char *cp, *cp1;
 135
 136 #if defined(CONFIG_DFU_FUNCTION)
 137         factory_dat.usb_vendor_id = CONFIG_G_DNL_VENDOR_NUM;
 138         factory_dat.usb_product_id = CONFIG_G_DNL_PRODUCT_NUM;
 139 #endif
 140         if (i2c_probe(i2c_addr))
 141                 goto err;
 142
 143         if (i2c_read(i2c_addr, EEPROM_FATORYSET_OFFSET, 2, hdr, sizeof(hdr)))
 144                 goto err;
 145
 146         if ((hdr[0] != 0x99) || (hdr[1] != 0x80)) {
 147                 printf("FactorySet is not right in eeprom.\n");
 148                 return 1;
 149         }
 150
 151         /* get FactorySet size */
 152         size = (hdr[2] << 8) + hdr[3] + sizeof(hdr);
 153         if (size > 0x3bfa)
 154                 size = 0x3bfa;
 155
 156         pages = size / EEPR_PG_SZ;
 157
 158         /*
 159          * read the eeprom using i2c
 160          * I can not read entire eeprom in once, so separate into several
 161          * times. Furthermore, fetch eeprom take longer time, so we fetch
 162          * data after every time we got a record from eeprom
 163          */
 164         debug("Read eeprom page :\n");
 165         for (i = 0; i < pages; i++)
 166                 if (i2c_read(i2c_addr, (OFF_PG + i) * EEPR_PG_SZ, 2,
 167                              eeprom_buf + (i * EEPR_PG_SZ), EEPR_PG_SZ))
 168                         goto err;
 169
 170         if (size % EEPR_PG_SZ)
 171                 if (i2c_read(i2c_addr, (OFF_PG + pages) * EEPR_PG_SZ, 2,
 172                              eeprom_buf + (pages * EEPR_PG_SZ),
 173                              (size % EEPR_PG_SZ)))
 174                         goto err;
 175
 176         /* we do below just for eeprom align */
 177         for (i = 0; i < size; i++)
 178                 if (eeprom_buf[i] == '\n')
 179                         eeprom_buf[i] = 0;
 180
 181         /* skip header */
 182         size -= sizeof(hdr);
 183         cp = (uchar *)eeprom_buf + sizeof(hdr);
 184
 185         /* get mac address */
 186         get_factory_record_val(cp, size, (uchar *)"ETH1", (uchar *)"mac",
 187                                buf, MAX_STRING_LENGTH);
 188         cp1 = buf;
 189         for (i = 0; i < 6; i++) {
 190                 factory_dat.mac[i] = simple_strtoul((char *)cp1, NULL, 16);
 191                 cp1 += 3;
 192         }
 193
 194 #if defined(CONFIG_DFU_FUNCTION)
 195         /* read vid and pid for dfu mode */
 196         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 197                                         (uchar *)"vid", buf,
 198                                         MAX_STRING_LENGTH)) {
 199                 factory_dat.usb_vendor_id = simple_strtoul((char *)buf,
 200                                                            NULL, 16);
 201         }
 202
 203         if (0 <= get_factory_record_val(cp, size, (uchar *)"USBD1",
 204                                         (uchar *)"pid", buf,
 205                                         MAX_STRING_LENGTH)) {
 206                 factory_dat.usb_product_id = simple_strtoul((char *)buf,
 207                                                             NULL, 16);
 208         }
 209         printf("DFU USB: VID = 0x%4x, PID = 0x%4x\n", factory_dat.usb_vendor_id,
 210                factory_dat.usb_product_id);
 211 #endif
 212         if (0 <= get_factory_record_val(cp, size, (uchar *)"DEV",
 213                                         (uchar *)"id", buf,
 214                                         MAX_STRING_LENGTH)) {
 215                 if (strncmp((const char *)buf, "PXM50", 5) == 0)
 216                         factory_dat.pxm50 = 1;
 217                 else
 218                         factory_dat.pxm50 = 0;
 219         }
 220         debug("PXM50: %d\n", factory_dat.pxm50);
 221 #if defined(CONFIG_VIDEO)
 222         if (0 <= get_factory_record_val(cp, size, (uchar *)"DISP1",
 223                                         (uchar *)"name", factory_dat.disp_name,
 224                                         MAX_STRING_LENGTH)) {
 225                 debug("display name: %s\n", factory_dat.disp_name);
 226         }
 227
 228 #endif
 229         return 0;
 230
 231 err:
 232         printf("Could not read the EEPROM; something fundamentally wrong on the I2C bus.\n");
 233         return 1;
 234 }
 235
 236 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
 237
 238 static int factoryset_mac_setenv(void)
 239 {
 240         uint8_t mac_addr[6];
 241
 242         debug("FactorySet: Set mac address\n");
 243         if (is_valid_ether_addr(factory_dat.mac)) {
 244                 memcpy(mac_addr, factory_dat.mac, 6);
 245         } else {
 246                 uint32_t mac_hi, mac_lo;
 247
 248                 debug("Warning: FactorySet: <ethaddr> not set. Fallback to E-fuse\n");
 249                 mac_lo = readl(&cdev->macid0l);
 250                 mac_hi = readl(&cdev->macid0h);
 251
 252                 mac_addr[0] = mac_hi & 0xFF;
 253                 mac_addr[1] = (mac_hi & 0xFF00) >> 8;
 254                 mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
 255                 mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
 256                 mac_addr[4] = mac_lo & 0xFF;
 257                 mac_addr[5] = (mac_lo & 0xFF00) >> 8;
 258                 if (!is_valid_ether_addr(mac_addr)) {
 259                         printf("Warning: ethaddr not set by FactorySet or E-fuse. Set <ethaddr> variable to overcome this.\n");
 260                         return -1;
 261                 }
 262         }
 263
 264         eth_setenv_enetaddr("ethaddr", mac_addr);
 265         return 0;
 266 }
 267
 268 int factoryset_setenv(void)
 269 {
 270         int ret = 0;
 271
 272         if (factoryset_mac_setenv() < 0)
 273                 ret = -1;
 274
 275         return ret;
 276 }
 277
 278 int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
 279 {
 280         put_unaligned(factory_dat.usb_vendor_id, &dev->idVendor);
 281         put_unaligned(factory_dat.usb_product_id, &dev->idProduct);
 282         return 0;
 283 }
 284 #endif /* defined(CONFIG_SPL_BUILD) */