1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2011
4 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
5 */
6
7 #include <common.h>
8 #include <cli_hush.h>
9 #include <i2c.h>
10 #include "common.h"
11
12 #define MAC_STR_SZ 20
13
ivm_calc_crc(unsigned char * buf,int len)14 static int ivm_calc_crc(unsigned char *buf, int len)
15 {
16 const unsigned short crc_tab[16] = {
17 0x0000, 0xCC01, 0xD801, 0x1400,
18 0xF001, 0x3C00, 0x2800, 0xE401,
19 0xA001, 0x6C00, 0x7800, 0xB401,
20 0x5000, 0x9C01, 0x8801, 0x4400};
21
22 unsigned short crc = 0; /* final result */
23 unsigned short r1 = 0; /* temp */
24 unsigned char byte = 0; /* input buffer */
25 int i;
26
27 /* calculate CRC from array data */
28 for (i = 0; i < len; i++) {
29 byte = buf[i];
30
31 /* lower 4 bits */
32 r1 = crc_tab[crc & 0xF];
33 crc = ((crc) >> 4) & 0x0FFF;
34 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
35
36 /* upper 4 bits */
37 r1 = crc_tab[crc & 0xF];
38 crc = (crc >> 4) & 0x0FFF;
39 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
40 }
41 return crc;
42 }
43
ivm_set_value(char * name,char * value)44 static int ivm_set_value(char *name, char *value)
45 {
46 char tempbuf[256];
47
48 if (value != NULL) {
49 sprintf(tempbuf, "%s=%s", name, value);
50 return set_local_var(tempbuf, 0);
51 } else {
52 unset_local_var(name);
53 }
54 return 0;
55 }
56
ivm_get_value(unsigned char * buf,int len,char * name,int off,int check)57 static int ivm_get_value(unsigned char *buf, int len, char *name, int off,
58 int check)
59 {
60 unsigned short val;
61 unsigned char valbuf[30];
62
63 if ((buf[off + 0] != buf[off + 2]) &&
64 (buf[off + 2] != buf[off + 4])) {
65 printf("%s Error corrupted %s\n", __func__, name);
66 val = -1;
67 } else {
68 val = buf[off + 0] + (buf[off + 1] << 8);
69 if ((val == 0) && (check == 1))
70 val = -1;
71 }
72 sprintf((char *)valbuf, "%x", val);
73 ivm_set_value(name, (char *)valbuf);
74 return val;
75 }
76
77 #define INV_BLOCKSIZE 0x100
78 #define INV_DATAADDRESS 0x21
79 #define INVENTORYDATASIZE (INV_BLOCKSIZE - INV_DATAADDRESS - 3)
80
81 #define IVM_POS_SHORT_TEXT 0
82 #define IVM_POS_MANU_ID 1
83 #define IVM_POS_MANU_SERIAL 2
84 #define IVM_POS_PART_NUMBER 3
85 #define IVM_POS_BUILD_STATE 4
86 #define IVM_POS_SUPPLIER_PART_NUMBER 5
87 #define IVM_POS_DELIVERY_DATE 6
88 #define IVM_POS_SUPPLIER_BUILD_STATE 7
89 #define IVM_POS_CUSTOMER_ID 8
90 #define IVM_POS_CUSTOMER_PROD_ID 9
91 #define IVM_POS_HISTORY 10
92 #define IVM_POS_SYMBOL_ONLY 11
93
convert_char(char c)94 static char convert_char(char c)
95 {
96 return (c < ' ' || c > '~') ? '.' : c;
97 }
98
ivm_findinventorystring(int type,unsigned char * const string,unsigned long maxlen,unsigned char * buf)99 static int ivm_findinventorystring(int type,
100 unsigned char *const string,
101 unsigned long maxlen,
102 unsigned char *buf)
103 {
104 int xcode = 0;
105 unsigned long cr = 0;
106 unsigned long addr = INV_DATAADDRESS;
107 unsigned long size = 0;
108 unsigned long nr = type;
109 int stop = 0; /* stop on semicolon */
110
111 memset(string, '\0', maxlen);
112 switch (type) {
113 case IVM_POS_SYMBOL_ONLY:
114 nr = 0;
115 stop = 1;
116 break;
117 default:
118 nr = type;
119 stop = 0;
120 }
121
122 /* Look for the requested number of CR. */
123 while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
124 if (buf[addr] == '\r')
125 cr++;
126 addr++;
127 }
128
129 /*
130 * the expected number of CR was found until the end of the IVM
131 * content --> fill string
132 */
133 if (addr < INVENTORYDATASIZE) {
134 /* Copy the IVM string in the corresponding string */
135 for (; (buf[addr] != '\r') &&
136 ((buf[addr] != ';') || (!stop)) &&
137 (size < (maxlen - 1) &&
138 (addr < INVENTORYDATASIZE)); addr++) {
139 size += sprintf((char *)string + size, "%c",
140 convert_char (buf[addr]));
141 }
142
143 /*
144 * copy phase is done: check if everything is ok. If not,
145 * the inventory data is most probably corrupted: tell
146 * the world there is a problem!
147 */
148 if (addr == INVENTORYDATASIZE) {
149 xcode = -1;
150 printf("Error end of string not found\n");
151 } else if ((size > (maxlen - 1)) &&
152 (buf[addr] != '\r')) {
153 xcode = -1;
154 printf("string too long till next CR\n");
155 }
156 } else {
157 /*
158 * some CR are missing...
159 * the inventory data is most probably corrupted
160 */
161 xcode = -1;
162 printf("not enough cr found\n");
163 }
164 return xcode;
165 }
166
167 #define GET_STRING(name, which, len) \
168 if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \
169 ivm_set_value(name, (char *)valbuf); \
170 }
171
ivm_check_crc(unsigned char * buf,int block)172 static int ivm_check_crc(unsigned char *buf, int block)
173 {
174 unsigned long crc;
175 unsigned long crceeprom;
176
177 crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
178 crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
179 buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
180 if (crc != crceeprom) {
181 if (block == 0)
182 printf("Error CRC Block: %d EEprom: calculated: \
183 %lx EEprom: %lx\n", block, crc, crceeprom);
184 return -1;
185 }
186 return 0;
187 }
188
189 /* take care of the possible MAC address offset and the IVM content offset */
process_mac(unsigned char * valbuf,unsigned char * buf,int offset,bool unique)190 static int process_mac(unsigned char *valbuf, unsigned char *buf,
191 int offset, bool unique)
192 {
193 unsigned char mac[6];
194 unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
195
196 /* use an intermediate buffer, to not change IVM content
197 * MAC address is at offset 1
198 */
199 memcpy(mac, buf+1, 6);
200
201 /* MAC adress can be set to locally administred, this is only allowed
202 * for interfaces which have now connection to the outside. For these
203 * addresses we need to set the second bit in the first byte.
204 */
205 if (!unique)
206 mac[0] |= 0x2;
207
208 if (offset) {
209 val += offset;
210 mac[3] = (val >> 16) & 0xff;
211 mac[4] = (val >> 8) & 0xff;
212 mac[5] = val & 0xff;
213 }
214
215 sprintf((char *)valbuf, "%pM", mac);
216 return 0;
217 }
218
ivm_analyze_block2(unsigned char * buf,int len)219 static int ivm_analyze_block2(unsigned char *buf, int len)
220 {
221 unsigned char valbuf[MAC_STR_SZ];
222 unsigned long count;
223
224 /* IVM_MAC Adress begins at offset 1 */
225 sprintf((char *)valbuf, "%pM", buf + 1);
226 ivm_set_value("IVM_MacAddress", (char *)valbuf);
227 /* IVM_MacCount */
228 count = (buf[10] << 24) +
229 (buf[11] << 16) +
230 (buf[12] << 8) +
231 buf[13];
232 if (count == 0xffffffff)
233 count = 1;
234 sprintf((char *)valbuf, "%lx", count);
235 ivm_set_value("IVM_MacCount", (char *)valbuf);
236 return 0;
237 }
238
ivm_analyze_eeprom(unsigned char * buf,int len)239 int ivm_analyze_eeprom(unsigned char *buf, int len)
240 {
241 unsigned short val;
242 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
243 unsigned char *tmp;
244
245 if (ivm_check_crc(buf, 0) != 0)
246 return -1;
247
248 ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
249 "IVM_BoardId", 0, 1);
250 val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
251 "IVM_HWKey", 6, 1);
252 if (val != 0xffff) {
253 sprintf((char *)valbuf, "%x", ((val / 100) % 10));
254 ivm_set_value("IVM_HWVariant", (char *)valbuf);
255 sprintf((char *)valbuf, "%x", (val % 100));
256 ivm_set_value("IVM_HWVersion", (char *)valbuf);
257 }
258 ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
259 "IVM_Functions", 12, 0);
260
261 GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
262 GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
263 tmp = (unsigned char *)env_get("IVM_DeviceName");
264 if (tmp) {
265 int len = strlen((char *)tmp);
266 int i = 0;
267
268 while (i < len) {
269 if (tmp[i] == ';') {
270 ivm_set_value("IVM_ShortText",
271 (char *)&tmp[i + 1]);
272 break;
273 }
274 i++;
275 }
276 if (i >= len)
277 ivm_set_value("IVM_ShortText", NULL);
278 } else {
279 ivm_set_value("IVM_ShortText", NULL);
280 }
281 GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
282 GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
283 GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
284 GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
285 GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
286 GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
287 GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
288 GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
289 GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
290
291 if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
292 return 0;
293 ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
294 CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
295
296 return 0;
297 }
298
ivm_populate_env(unsigned char * buf,int len)299 static int ivm_populate_env(unsigned char *buf, int len)
300 {
301 unsigned char *page2;
302 unsigned char valbuf[MAC_STR_SZ];
303
304 /* do we have the page 2 filled ? if not return */
305 if (ivm_check_crc(buf, 2))
306 return 0;
307 page2 = &buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN*2];
308
309 #ifndef CONFIG_KMTEGR1
310 /* if an offset is defined, add it */
311 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
312 env_set((char *)"ethaddr", (char *)valbuf);
313 #ifdef CONFIG_KMVECT1
314 /* KMVECT1 has two ethernet interfaces */
315 process_mac(valbuf, page2, 1, true);
316 env_set((char *)"eth1addr", (char *)valbuf);
317 #endif
318 #else
319 /* KMTEGR1 has a special setup. eth0 has no connection to the outside and
320 * gets an locally administred MAC address, eth1 is the debug interface and
321 * gets the official MAC address from the IVM
322 */
323 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, false);
324 env_set((char *)"ethaddr", (char *)valbuf);
325 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
326 env_set((char *)"eth1addr", (char *)valbuf);
327 #endif
328
329 return 0;
330 }
331
ivm_read_eeprom(unsigned char * buf,int len)332 int ivm_read_eeprom(unsigned char *buf, int len)
333 {
334 int ret;
335
336 i2c_set_bus_num(CONFIG_KM_IVM_BUS);
337 /* add deblocking here */
338 i2c_make_abort();
339
340 ret = i2c_read(CONFIG_SYS_IVM_EEPROM_ADR, 0, 1, buf, len);
341 if (ret != 0) {
342 printf("Error reading EEprom\n");
343 return -2;
344 }
345
346 return ivm_populate_env(buf, len);
347 }
348