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Holger Brunck4f745bf2011-06-05 22:22:18 +00001/*
2 * (C) Copyright 2011
3 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Holger Brunck4f745bf2011-06-05 22:22:18 +00006 */
7
8#include <common.h>
Simon Glasseca86fa2014-04-10 20:01:24 -06009#include <cli_hush.h>
Holger Brunck4f745bf2011-06-05 22:22:18 +000010#include <i2c.h>
11#include "common.h"
12
Valentin Longchamp16ac90c2015-02-10 17:10:13 +010013#define MAC_STR_SZ 20
14
Holger Brunck283857d2013-05-06 15:02:40 +020015static int ivm_calc_crc(unsigned char *buf, int len)
Holger Brunck4f745bf2011-06-05 22:22:18 +000016{
17 const unsigned short crc_tab[16] = {
18 0x0000, 0xCC01, 0xD801, 0x1400,
19 0xF001, 0x3C00, 0x2800, 0xE401,
20 0xA001, 0x6C00, 0x7800, 0xB401,
21 0x5000, 0x9C01, 0x8801, 0x4400};
22
23 unsigned short crc = 0; /* final result */
24 unsigned short r1 = 0; /* temp */
25 unsigned char byte = 0; /* input buffer */
26 int i;
27
28 /* calculate CRC from array data */
29 for (i = 0; i < len; i++) {
30 byte = buf[i];
31
32 /* lower 4 bits */
33 r1 = crc_tab[crc & 0xF];
34 crc = ((crc) >> 4) & 0x0FFF;
35 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
36
37 /* upper 4 bits */
38 r1 = crc_tab[crc & 0xF];
39 crc = (crc >> 4) & 0x0FFF;
40 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
41 }
42 return crc;
43}
44
45static int ivm_set_value(char *name, char *value)
46{
47 char tempbuf[256];
48
49 if (value != NULL) {
50 sprintf(tempbuf, "%s=%s", name, value);
51 return set_local_var(tempbuf, 0);
52 } else {
53 unset_local_var(name);
54 }
55 return 0;
56}
57
58static int ivm_get_value(unsigned char *buf, int len, char *name, int off,
59 int check)
60{
61 unsigned short val;
62 unsigned char valbuf[30];
63
64 if ((buf[off + 0] != buf[off + 2]) &&
65 (buf[off + 2] != buf[off + 4])) {
66 printf("%s Error corrupted %s\n", __func__, name);
67 val = -1;
68 } else {
69 val = buf[off + 0] + (buf[off + 1] << 8);
70 if ((val == 0) && (check == 1))
71 val = -1;
72 }
73 sprintf((char *)valbuf, "%x", val);
74 ivm_set_value(name, (char *)valbuf);
75 return val;
76}
77
78#define INV_BLOCKSIZE 0x100
79#define INV_DATAADDRESS 0x21
80#define INVENTORYDATASIZE (INV_BLOCKSIZE - INV_DATAADDRESS - 3)
81
82#define IVM_POS_SHORT_TEXT 0
83#define IVM_POS_MANU_ID 1
84#define IVM_POS_MANU_SERIAL 2
85#define IVM_POS_PART_NUMBER 3
86#define IVM_POS_BUILD_STATE 4
87#define IVM_POS_SUPPLIER_PART_NUMBER 5
88#define IVM_POS_DELIVERY_DATE 6
89#define IVM_POS_SUPPLIER_BUILD_STATE 7
90#define IVM_POS_CUSTOMER_ID 8
91#define IVM_POS_CUSTOMER_PROD_ID 9
92#define IVM_POS_HISTORY 10
93#define IVM_POS_SYMBOL_ONLY 11
94
95static char convert_char(char c)
96{
97 return (c < ' ' || c > '~') ? '.' : c;
98}
99
100static int ivm_findinventorystring(int type,
101 unsigned char *const string,
102 unsigned long maxlen,
103 unsigned char *buf)
104{
105 int xcode = 0;
106 unsigned long cr = 0;
107 unsigned long addr = INV_DATAADDRESS;
108 unsigned long size = 0;
109 unsigned long nr = type;
110 int stop = 0; /* stop on semicolon */
111
112 memset(string, '\0', maxlen);
113 switch (type) {
114 case IVM_POS_SYMBOL_ONLY:
115 nr = 0;
116 stop = 1;
117 break;
118 default:
119 nr = type;
120 stop = 0;
121 }
122
123 /* Look for the requested number of CR. */
124 while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
Jeroen Hofstee27160772014-06-11 00:34:39 +0200125 if (buf[addr] == '\r')
Holger Brunck4f745bf2011-06-05 22:22:18 +0000126 cr++;
127 addr++;
128 }
129
130 /*
131 * the expected number of CR was found until the end of the IVM
132 * content --> fill string
133 */
134 if (addr < INVENTORYDATASIZE) {
135 /* Copy the IVM string in the corresponding string */
136 for (; (buf[addr] != '\r') &&
137 ((buf[addr] != ';') || (!stop)) &&
138 (size < (maxlen - 1) &&
139 (addr < INVENTORYDATASIZE)); addr++) {
140 size += sprintf((char *)string + size, "%c",
141 convert_char (buf[addr]));
142 }
143
144 /*
145 * copy phase is done: check if everything is ok. If not,
146 * the inventory data is most probably corrupted: tell
147 * the world there is a problem!
148 */
149 if (addr == INVENTORYDATASIZE) {
150 xcode = -1;
151 printf("Error end of string not found\n");
Valentin Longchamp62c9b962012-08-14 01:16:36 +0000152 } else if ((size > (maxlen - 1)) &&
Holger Brunck4f745bf2011-06-05 22:22:18 +0000153 (buf[addr] != '\r')) {
154 xcode = -1;
155 printf("string too long till next CR\n");
156 }
157 } else {
158 /*
159 * some CR are missing...
160 * the inventory data is most probably corrupted
161 */
162 xcode = -1;
163 printf("not enough cr found\n");
164 }
165 return xcode;
166}
167
168#define GET_STRING(name, which, len) \
169 if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \
170 ivm_set_value(name, (char *)valbuf); \
171 }
172
173static int ivm_check_crc(unsigned char *buf, int block)
174{
175 unsigned long crc;
176 unsigned long crceeprom;
177
178 crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
179 crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
180 buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
181 if (crc != crceeprom) {
182 if (block == 0)
183 printf("Error CRC Block: %d EEprom: calculated: \
184 %lx EEprom: %lx\n", block, crc, crceeprom);
185 return -1;
186 }
187 return 0;
188}
189
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100190/* take care of the possible MAC address offset and the IVM content offset */
191static int process_mac(unsigned char *valbuf, unsigned char *buf,
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200192 int offset, bool unique)
Holger Brunck322bb202013-01-21 03:55:17 +0000193{
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100194 unsigned char mac[6];
Holger Brunck322bb202013-01-21 03:55:17 +0000195 unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
196
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100197 /* use an intermediate buffer, to not change IVM content
198 * MAC address is at offset 1
199 */
200 memcpy(mac, buf+1, 6);
Holger Brunck322bb202013-01-21 03:55:17 +0000201
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200202 /* MAC adress can be set to locally administred, this is only allowed
203 * for interfaces which have now connection to the outside. For these
204 * addresses we need to set the second bit in the first byte.
205 */
206 if (!unique)
207 mac[0] |= 0x2;
208
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100209 if (offset) {
210 val += offset;
211 mac[3] = (val >> 16) & 0xff;
212 mac[4] = (val >> 8) & 0xff;
213 mac[5] = val & 0xff;
214 }
215
216 sprintf((char *)valbuf, "%pM", mac);
Holger Brunck322bb202013-01-21 03:55:17 +0000217 return 0;
218}
219
Holger Brunck4f745bf2011-06-05 22:22:18 +0000220static int ivm_analyze_block2(unsigned char *buf, int len)
221{
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100222 unsigned char valbuf[MAC_STR_SZ];
Holger Brunck4f745bf2011-06-05 22:22:18 +0000223 unsigned long count;
224
Holger Brunck64780212011-09-20 05:05:55 +0000225 /* IVM_MAC Adress begins at offset 1 */
226 sprintf((char *)valbuf, "%pM", buf + 1);
Holger Brunck4f745bf2011-06-05 22:22:18 +0000227 ivm_set_value("IVM_MacAddress", (char *)valbuf);
Holger Brunck4f745bf2011-06-05 22:22:18 +0000228 /* IVM_MacCount */
229 count = (buf[10] << 24) +
230 (buf[11] << 16) +
231 (buf[12] << 8) +
232 buf[13];
233 if (count == 0xffffffff)
234 count = 1;
235 sprintf((char *)valbuf, "%lx", count);
236 ivm_set_value("IVM_MacCount", (char *)valbuf);
237 return 0;
238}
239
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100240int ivm_analyze_eeprom(unsigned char *buf, int len)
Holger Brunck4f745bf2011-06-05 22:22:18 +0000241{
242 unsigned short val;
243 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
244 unsigned char *tmp;
245
246 if (ivm_check_crc(buf, 0) != 0)
247 return -1;
248
249 ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
250 "IVM_BoardId", 0, 1);
251 val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
252 "IVM_HWKey", 6, 1);
253 if (val != 0xffff) {
254 sprintf((char *)valbuf, "%x", ((val / 100) % 10));
255 ivm_set_value("IVM_HWVariant", (char *)valbuf);
256 sprintf((char *)valbuf, "%x", (val % 100));
257 ivm_set_value("IVM_HWVersion", (char *)valbuf);
258 }
259 ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
260 "IVM_Functions", 12, 0);
261
262 GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
263 GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
Simon Glass00caae62017-08-03 12:22:12 -0600264 tmp = (unsigned char *)env_get("IVM_DeviceName");
Holger Brunck4f745bf2011-06-05 22:22:18 +0000265 if (tmp) {
266 int len = strlen((char *)tmp);
267 int i = 0;
268
269 while (i < len) {
270 if (tmp[i] == ';') {
271 ivm_set_value("IVM_ShortText",
272 (char *)&tmp[i + 1]);
273 break;
274 }
275 i++;
276 }
277 if (i >= len)
278 ivm_set_value("IVM_ShortText", NULL);
279 } else {
280 ivm_set_value("IVM_ShortText", NULL);
281 }
282 GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
283 GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
284 GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
285 GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
286 GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
287 GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
288 GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
289 GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
290 GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
291
292 if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
293 return 0;
294 ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
295 CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
296
297 return 0;
298}
299
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100300static int ivm_populate_env(unsigned char *buf, int len)
301{
302 unsigned char *page2;
303 unsigned char valbuf[MAC_STR_SZ];
304
305 /* do we have the page 2 filled ? if not return */
306 if (ivm_check_crc(buf, 2))
307 return 0;
308 page2 = &buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN*2];
309
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200310#ifndef CONFIG_KMTEGR1
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100311 /* if an offset is defined, add it */
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200312 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
Simon Glass382bee52017-08-03 12:22:09 -0600313 env_set((char *)"ethaddr", (char *)valbuf);
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100314#ifdef CONFIG_KMVECT1
315/* KMVECT1 has two ethernet interfaces */
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200316 process_mac(valbuf, page2, 1, true);
Simon Glass382bee52017-08-03 12:22:09 -0600317 env_set((char *)"eth1addr", (char *)valbuf);
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200318#endif
319#else
320/* KMTEGR1 has a special setup. eth0 has no connection to the outside and
321 * gets an locally administred MAC address, eth1 is the debug interface and
322 * gets the official MAC address from the IVM
323 */
324 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, false);
Simon Glass382bee52017-08-03 12:22:09 -0600325 env_set((char *)"ethaddr", (char *)valbuf);
Holger Brunckb2f2c7be2017-07-13 11:15:41 +0200326 process_mac(valbuf, page2, CONFIG_PIGGY_MAC_ADRESS_OFFSET, true);
Simon Glass382bee52017-08-03 12:22:09 -0600327 env_set((char *)"eth1addr", (char *)valbuf);
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100328#endif
329
330 return 0;
331}
332
Valentin Longchamp60c4ae02015-02-10 17:10:18 +0100333int ivm_read_eeprom(unsigned char *buf, int len)
Valentin Longchamp16ac90c2015-02-10 17:10:13 +0100334{
335 int ret;
336
337 i2c_set_bus_num(CONFIG_KM_IVM_BUS);
338 /* add deblocking here */
339 i2c_make_abort();
340
341 ret = i2c_read(CONFIG_SYS_IVM_EEPROM_ADR, 0, 1, buf, len);
342 if (ret != 0) {
343 printf("Error reading EEprom\n");
344 return -2;
345 }
346
347 return ivm_populate_env(buf, len);
348}