1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * 4 * Read FactorySet information from EEPROM into global structure. 5 * (C) Copyright 2013 Siemens Schweiz AG 6 */ 7 8 #if !defined(CONFIG_SPL_BUILD) 9 10 #include <common.h> 11 #include <environment.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) */ 323
