3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
34 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
38 extern int i2c_soft_read_pin (void);
40 int ivm_calc_crc (unsigned char *buf, int len)
42 const unsigned short crc_tab[16] = {
43 0x0000, 0xCC01, 0xD801, 0x1400,
44 0xF001, 0x3C00, 0x2800, 0xE401,
45 0xA001, 0x6C00, 0x7800, 0xB401,
46 0x5000, 0x9C01, 0x8801, 0x4400};
48 unsigned short crc = 0; /* final result */
49 unsigned short r1 = 0; /* temp */
50 unsigned char byte = 0; /* input buffer */
53 /* calculate CRC from array data */
54 for (i = 0; i < len; i++) {
58 r1 = crc_tab[crc & 0xF];
59 crc = ((crc) >> 4) & 0x0FFF;
60 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
63 r1 = crc_tab[crc & 0xF];
64 crc = (crc >> 4) & 0x0FFF;
65 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
70 static int ivm_set_value (char *name, char *value)
75 sprintf (tempbuf, "%s=%s", name, value);
76 return set_local_var (tempbuf, 0);
78 unset_local_var (name);
83 static int ivm_get_value (unsigned char *buf, int len, char *name, int off,
87 unsigned char valbuf[30];
89 if ((buf[off + 0] != buf[off + 2]) &&
90 (buf[off + 2] != buf[off + 4])) {
91 printf ("%s Error corrupted %s\n", __FUNCTION__, name);
94 val = buf[off + 0] + (buf[off + 1] << 8);
95 if ((val == 0) && (check == 1))
98 sprintf ((char *)valbuf, "%x", val);
99 ivm_set_value (name, (char *)valbuf);
103 #define INVENTORYBLOCKSIZE 0x100
104 #define INVENTORYDATAADDRESS 0x21
105 #define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)
107 #define IVM_POS_SHORT_TEXT 0
108 #define IVM_POS_MANU_ID 1
109 #define IVM_POS_MANU_SERIAL 2
110 #define IVM_POS_PART_NUMBER 3
111 #define IVM_POS_BUILD_STATE 4
112 #define IVM_POS_SUPPLIER_PART_NUMBER 5
113 #define IVM_POS_DELIVERY_DATE 6
114 #define IVM_POS_SUPPLIER_BUILD_STATE 7
115 #define IVM_POS_CUSTOMER_ID 8
116 #define IVM_POS_CUSTOMER_PROD_ID 9
117 #define IVM_POS_HISTORY 10
118 #define IVM_POS_SYMBOL_ONLY 11
120 static char convert_char (char c)
122 return (c < ' ' || c > '~') ? '.' : c;
125 static int ivm_findinventorystring (int type,
126 unsigned char* const string,
127 unsigned long maxlen,
131 unsigned long cr = 0;
132 unsigned long addr = INVENTORYDATAADDRESS;
133 unsigned long size = 0;
134 unsigned long nr = type;
135 int stop = 0; /* stop on semicolon */
137 memset(string, '\0', maxlen);
139 case IVM_POS_SYMBOL_ONLY:
148 /* Look for the requested number of CR. */
149 while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
150 if ((buf[addr] == '\r')) {
156 /* the expected number of CR was found until the end of the IVM
157 * content --> fill string */
158 if (addr < INVENTORYDATASIZE) {
159 /* Copy the IVM string in the corresponding string */
160 for (; (buf[addr] != '\r') &&
161 ((buf[addr] != ';') || (!stop)) &&
162 (size < (maxlen - 1) &&
163 (addr < INVENTORYDATASIZE)); addr++)
165 size += sprintf((char *)string + size, "%c",
166 convert_char (buf[addr]));
169 /* copy phase is done: check if everything is ok. If not,
170 * the inventory data is most probably corrupted: tell
171 * the world there is a problem! */
172 if (addr == INVENTORYDATASIZE) {
174 printf ("Error end of string not found\n");
175 } else if ((size >= (maxlen - 1)) &&
176 (buf[addr] != '\r')) {
178 printf ("string too long till next CR\n");
181 /* some CR are missing...
182 * the inventory data is most probably corrupted */
184 printf ("not enough cr found\n");
189 #define GET_STRING(name, which, len) \
190 if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
191 ivm_set_value (name, (char *)valbuf); \
194 static int ivm_check_crc (unsigned char *buf, int block)
197 unsigned long crceeprom;
199 crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
200 crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
201 buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
202 if (crc != crceeprom) {
203 printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
204 block, crc, crceeprom);
210 static int ivm_analyze_block2 (unsigned char *buf, int len)
212 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
216 sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
223 ivm_set_value ("IVM_MacAddress", (char *)valbuf);
224 if (getenv ("ethaddr") == NULL)
225 setenv ((char *)"ethaddr", (char *)valbuf);
227 count = (buf[10] << 24) +
231 if (count == 0xffffffff)
233 sprintf ((char *)valbuf, "%lx", count);
234 ivm_set_value ("IVM_MacCount", (char *)valbuf);
238 int ivm_analyze_eeprom (unsigned char *buf, int len)
241 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
244 if (ivm_check_crc (buf, 0) != 0)
247 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
248 val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1);
250 sprintf ((char *)valbuf, "%x", ((val /100) % 10));
251 ivm_set_value ("IVM_HWVariant", (char *)valbuf);
252 sprintf ((char *)valbuf, "%x", (val % 100));
253 ivm_set_value ("IVM_HWVersion", (char *)valbuf);
255 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);
257 GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
258 GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
259 tmp = (unsigned char *) getenv("IVM_DeviceName");
261 int len = strlen ((char *)tmp);
266 ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
272 ivm_set_value ("IVM_ShortText", NULL);
274 ivm_set_value ("IVM_ShortText", NULL);
276 GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
277 GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
278 GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
279 GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
280 GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
281 GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
282 GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
283 GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
284 GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
286 if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
288 ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
293 int ivm_read_eeprom (void)
295 I2C_MUX_DEVICE *dev = NULL;
296 uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
298 unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
300 /* First init the Bus, select the Bus */
301 #if defined(CONFIG_SYS_I2C_IVM_BUS)
302 dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
304 buf = (unsigned char *) getenv ("EEprom_ivm");
306 dev = i2c_mux_ident_muxstring (buf);
309 printf ("Error couldnt add Bus for IVM\n");
312 i2c_set_bus_num (dev->busid);
314 buf = (unsigned char *) getenv ("EEprom_ivm_addr");
316 dev_addr = simple_strtoul ((char *)buf, NULL, 16);
318 if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
319 printf ("Error reading EEprom\n");
323 return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
326 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
327 #define DELAY_ABORT_SEQ 62
328 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
330 #if defined(CONFIG_MGCOGE)
331 #define SDA_MASK 0x00010000
332 #define SCL_MASK 0x00020000
333 static void set_pin (int state, unsigned long mask)
335 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
340 iop->pdat &= ~(mask);
345 static int get_pin (unsigned long mask)
347 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
349 iop->pdir &= ~(mask);
350 return (0 != (iop->pdat & (mask)));
353 static void set_sda (int state)
355 set_pin (state, SDA_MASK);
358 static void set_scl (int state)
360 set_pin (state, SCL_MASK);
363 static int get_sda (void)
365 return get_pin (SDA_MASK);
368 static int get_scl (void)
370 return get_pin (SCL_MASK);
373 #if defined(CONFIG_HARD_I2C)
374 static void setports (int gpio)
376 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
379 iop->ppar &= ~(SDA_MASK | SCL_MASK);
380 iop->podr &= ~(SDA_MASK | SCL_MASK);
382 iop->ppar |= (SDA_MASK | SCL_MASK);
383 iop->pdir &= ~(SDA_MASK | SCL_MASK);
384 iop->podr |= (SDA_MASK | SCL_MASK);
390 #if defined(CONFIG_MGSUVD)
391 static void set_sda (int state)
396 static void set_scl (int state)
401 static int get_sda (void)
403 return i2c_soft_read_pin ();
406 static int get_scl (void)
410 *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF;
412 val = *(unsigned char *)(I2C_BASE_PORT);
414 return ((val & SCL_BIT) == SCL_BIT);
419 static void writeStartSeq (void)
422 udelay (DELAY_HALF_PERIOD);
424 udelay (DELAY_HALF_PERIOD);
426 udelay (DELAY_HALF_PERIOD);
428 udelay (DELAY_HALF_PERIOD);
431 /* I2C is a synchronous protocol and resets of the processor in the middle
432 of an access can block the I2C Bus until a powerdown of the full unit is
433 done. This function toggles the SCL until the SCL and SCA line are
434 released, but max. 16 times, after this a I2C start-sequence is sent.
435 This I2C Deblocking mechanism was developed by Keymile in association
436 with Anatech and Atmel in 1998.
438 static int i2c_make_abort (void)
450 udelay (DELAY_ABORT_SEQ);
452 udelay (DELAY_ABORT_SEQ);
453 scl_state = get_scl ();
454 sda_state = get_sda ();
455 if (scl_state && sda_state) {
462 for (i =0; i < 5; i++) {
471 * i2c_init_board - reset i2c bus. When the board is powercycled during a
472 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
474 void i2c_init_board(void)
476 #if defined(CONFIG_HARD_I2C)
477 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
478 volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
480 /* disable I2C controller first, otherwhise it thinks we want to */
481 /* talk to the slave port... */
482 i2c->i2c_i2mod &= ~0x01;
484 /* Set the PortPins to GPIO */
488 /* Now run the AbortSequence() */
491 #if defined(CONFIG_HARD_I2C)
492 /* Set the PortPins back to use for I2C */