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)
39 extern int i2c_soft_read_pin (void);
41 int ivm_calc_crc (unsigned char *buf, int len)
43 const unsigned short crc_tab[16] = {
44 0x0000, 0xCC01, 0xD801, 0x1400,
45 0xF001, 0x3C00, 0x2800, 0xE401,
46 0xA001, 0x6C00, 0x7800, 0xB401,
47 0x5000, 0x9C01, 0x8801, 0x4400};
49 unsigned short crc = 0; /* final result */
50 unsigned short r1 = 0; /* temp */
51 unsigned char byte = 0; /* input buffer */
54 /* calculate CRC from array data */
55 for (i = 0; i < len; i++) {
59 r1 = crc_tab[crc & 0xF];
60 crc = ((crc) >> 4) & 0x0FFF;
61 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
64 r1 = crc_tab[crc & 0xF];
65 crc = (crc >> 4) & 0x0FFF;
66 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
71 static int ivm_set_value (char *name, char *value)
76 sprintf (tempbuf, "%s=%s", name, value);
77 return set_local_var (tempbuf, 0);
79 unset_local_var (name);
84 static int ivm_get_value (unsigned char *buf, int len, char *name, int off,
88 unsigned char valbuf[30];
90 if ((buf[off + 0] != buf[off + 2]) &&
91 (buf[off + 2] != buf[off + 4])) {
92 printf ("%s Error corrupted %s\n", __FUNCTION__, name);
95 val = buf[off + 0] + (buf[off + 1] << 8);
96 if ((val == 0) && (check == 1))
99 sprintf ((char *)valbuf, "%x", val);
100 ivm_set_value (name, (char *)valbuf);
104 #define INVENTORYBLOCKSIZE 0x100
105 #define INVENTORYDATAADDRESS 0x21
106 #define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)
108 #define IVM_POS_SHORT_TEXT 0
109 #define IVM_POS_MANU_ID 1
110 #define IVM_POS_MANU_SERIAL 2
111 #define IVM_POS_PART_NUMBER 3
112 #define IVM_POS_BUILD_STATE 4
113 #define IVM_POS_SUPPLIER_PART_NUMBER 5
114 #define IVM_POS_DELIVERY_DATE 6
115 #define IVM_POS_SUPPLIER_BUILD_STATE 7
116 #define IVM_POS_CUSTOMER_ID 8
117 #define IVM_POS_CUSTOMER_PROD_ID 9
118 #define IVM_POS_HISTORY 10
119 #define IVM_POS_SYMBOL_ONLY 11
121 static char convert_char (char c)
123 return (c < ' ' || c > '~') ? '.' : c;
126 static int ivm_findinventorystring (int type,
127 unsigned char* const string,
128 unsigned long maxlen,
132 unsigned long cr = 0;
133 unsigned long addr = INVENTORYDATAADDRESS;
134 unsigned long size = 0;
135 unsigned long nr = type;
136 int stop = 0; /* stop on semicolon */
138 memset(string, '\0', maxlen);
140 case IVM_POS_SYMBOL_ONLY:
149 /* Look for the requested number of CR. */
150 while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
151 if ((buf[addr] == '\r')) {
157 /* the expected number of CR was found until the end of the IVM
158 * content --> fill string */
159 if (addr < INVENTORYDATASIZE) {
160 /* Copy the IVM string in the corresponding string */
161 for (; (buf[addr] != '\r') &&
162 ((buf[addr] != ';') || (!stop)) &&
163 (size < (maxlen - 1) &&
164 (addr < INVENTORYDATASIZE)); addr++)
166 size += sprintf((char *)string + size, "%c",
167 convert_char (buf[addr]));
170 /* copy phase is done: check if everything is ok. If not,
171 * the inventory data is most probably corrupted: tell
172 * the world there is a problem! */
173 if (addr == INVENTORYDATASIZE) {
175 printf ("Error end of string not found\n");
176 } else if ((size >= (maxlen - 1)) &&
177 (buf[addr] != '\r')) {
179 printf ("string too long till next CR\n");
182 /* some CR are missing...
183 * the inventory data is most probably corrupted */
185 printf ("not enough cr found\n");
190 #define GET_STRING(name, which, len) \
191 if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
192 ivm_set_value (name, (char *)valbuf); \
195 static int ivm_check_crc (unsigned char *buf, int block)
198 unsigned long crceeprom;
200 crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
201 crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
202 buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
203 if (crc != crceeprom) {
204 printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
205 block, crc, crceeprom);
211 static int ivm_analyze_block2 (unsigned char *buf, int len)
213 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
217 sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
224 ivm_set_value ("IVM_MacAddress", (char *)valbuf);
225 if (getenv ("ethaddr") == NULL)
226 setenv ((char *)"ethaddr", (char *)valbuf);
228 count = (buf[10] << 24) +
232 if (count == 0xffffffff)
234 sprintf ((char *)valbuf, "%lx", count);
235 ivm_set_value ("IVM_MacCount", (char *)valbuf);
239 int ivm_analyze_eeprom (unsigned char *buf, int len)
242 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
245 if (ivm_check_crc (buf, 0) != 0)
248 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
249 val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1);
251 sprintf ((char *)valbuf, "%x", ((val /100) % 10));
252 ivm_set_value ("IVM_HWVariant", (char *)valbuf);
253 sprintf ((char *)valbuf, "%x", (val % 100));
254 ivm_set_value ("IVM_HWVersion", (char *)valbuf);
256 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);
258 GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
259 GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
260 tmp = (unsigned char *) getenv("IVM_DeviceName");
262 int len = strlen ((char *)tmp);
267 ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
273 ivm_set_value ("IVM_ShortText", NULL);
275 ivm_set_value ("IVM_ShortText", NULL);
277 GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
278 GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
279 GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
280 GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
281 GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
282 GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
283 GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
284 GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
285 GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
287 if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
289 ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
294 int ivm_read_eeprom (void)
296 I2C_MUX_DEVICE *dev = NULL;
297 uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
299 unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
301 /* First init the Bus, select the Bus */
302 #if defined(CONFIG_SYS_I2C_IVM_BUS)
303 dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
305 buf = (unsigned char *) getenv ("EEprom_ivm");
307 dev = i2c_mux_ident_muxstring (buf);
310 printf ("Error couldnt add Bus for IVM\n");
313 i2c_set_bus_num (dev->busid);
315 buf = (unsigned char *) getenv ("EEprom_ivm_addr");
317 dev_addr = simple_strtoul ((char *)buf, NULL, 16);
319 if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
320 printf ("Error reading EEprom\n");
324 return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
327 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
328 #define DELAY_ABORT_SEQ 62
329 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
331 #if defined(CONFIG_MGCOGE)
332 #define SDA_MASK 0x00010000
333 #define SCL_MASK 0x00020000
334 static void set_pin (int state, unsigned long mask)
336 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
341 iop->pdat &= ~(mask);
346 static int get_pin (unsigned long mask)
348 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
350 iop->pdir &= ~(mask);
351 return (0 != (iop->pdat & (mask)));
354 static void set_sda (int state)
356 set_pin (state, SDA_MASK);
359 static void set_scl (int state)
361 set_pin (state, SCL_MASK);
364 static int get_sda (void)
366 return get_pin (SDA_MASK);
369 static int get_scl (void)
371 return get_pin (SCL_MASK);
374 #if defined(CONFIG_HARD_I2C)
375 static void setports (int gpio)
377 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
380 iop->ppar &= ~(SDA_MASK | SCL_MASK);
381 iop->podr &= ~(SDA_MASK | SCL_MASK);
383 iop->ppar |= (SDA_MASK | SCL_MASK);
384 iop->pdir &= ~(SDA_MASK | SCL_MASK);
385 iop->podr |= (SDA_MASK | SCL_MASK);
391 #if defined(CONFIG_MGSUVD)
392 static void set_sda (int state)
397 static void set_scl (int state)
402 static int get_sda (void)
407 static int get_scl (void)
411 *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF;
413 val = *(unsigned char *)(I2C_BASE_PORT);
415 return ((val & SCL_BIT) == SCL_BIT);
420 static void writeStartSeq (void)
423 udelay (DELAY_HALF_PERIOD);
425 udelay (DELAY_HALF_PERIOD);
427 udelay (DELAY_HALF_PERIOD);
429 udelay (DELAY_HALF_PERIOD);
432 /* I2C is a synchronous protocol and resets of the processor in the middle
433 of an access can block the I2C Bus until a powerdown of the full unit is
434 done. This function toggles the SCL until the SCL and SCA line are
435 released, but max. 16 times, after this a I2C start-sequence is sent.
436 This I2C Deblocking mechanism was developed by Keymile in association
437 with Anatech and Atmel in 1998.
439 static int i2c_make_abort (void)
451 udelay (DELAY_ABORT_SEQ);
453 udelay (DELAY_ABORT_SEQ);
454 scl_state = get_scl ();
455 sda_state = get_sda ();
456 if (scl_state && sda_state) {
463 for (i =0; i < 5; i++) {
472 * i2c_init_board - reset i2c bus. When the board is powercycled during a
473 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
475 void i2c_init_board(void)
477 #if defined(CONFIG_HARD_I2C)
478 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
479 volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
481 /* disable I2C controller first, otherwhise it thinks we want to */
482 /* talk to the slave port... */
483 i2c->i2c_i2mod &= ~0x01;
485 /* Set the PortPins to GPIO */
489 /* Now run the AbortSequence() */
492 #if defined(CONFIG_HARD_I2C)
493 /* Set the PortPins back to use for I2C */