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Heiko Schocherc2485362008-10-15 09:39:08 +02001/*
2 * (C) Copyright 2008
3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
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.
12 *
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.
17 *
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,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <mpc8260.h>
26#include <ioports.h>
27#include <malloc.h>
Heiko Schocher8f64da72008-10-15 09:41:00 +020028#include <hush.h>
Heiko Schocherc2485362008-10-15 09:39:08 +020029
30#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
31#include <libfdt.h>
32#endif
33
34#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
35#include <i2c.h>
36#endif
Heiko Schochera21ca952008-10-17 13:52:51 +020037#include <asm/io.h>
Heiko Schocherc2485362008-10-15 09:39:08 +020038
39extern int i2c_soft_read_pin (void);
40
Heiko Schocher8f64da72008-10-15 09:41:00 +020041int ivm_calc_crc (unsigned char *buf, int len)
42{
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};
48
49 unsigned short crc = 0; /* final result */
50 unsigned short r1 = 0; /* temp */
51 unsigned char byte = 0; /* input buffer */
52 int i;
53
54 /* calculate CRC from array data */
55 for (i = 0; i < len; i++) {
56 byte = buf[i];
57
58 /* lower 4 bits */
59 r1 = crc_tab[crc & 0xF];
60 crc = ((crc) >> 4) & 0x0FFF;
61 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
62
63 /* upper 4 bits */
64 r1 = crc_tab[crc & 0xF];
65 crc = (crc >> 4) & 0x0FFF;
66 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
67 }
68 return crc;
69}
70
71static int ivm_set_value (char *name, char *value)
72{
73 char tempbuf[256];
74
75 if (value != NULL) {
76 sprintf (tempbuf, "%s=%s", name, value);
77 return set_local_var (tempbuf, 0);
78 } else {
79 unset_local_var (name);
80 }
81 return 0;
82}
83
84static int ivm_get_value (unsigned char *buf, int len, char *name, int off,
85 int check)
86{
87 unsigned short val;
88 unsigned char valbuf[30];
89
90 if ((buf[off + 0] != buf[off + 2]) &&
91 (buf[off + 2] != buf[off + 4])) {
92 printf ("%s Error corrupted %s\n", __FUNCTION__, name);
93 val = -1;
94 } else {
95 val = buf[off + 0] + (buf[off + 1] << 8);
96 if ((val == 0) && (check == 1))
97 val = -1;
98 }
99 sprintf ((char *)valbuf, "%x", val);
100 ivm_set_value (name, (char *)valbuf);
101 return val;
102}
103
104#define INVENTORYBLOCKSIZE 0x100
105#define INVENTORYDATAADDRESS 0x21
106#define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)
107
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
120
121static char convert_char (char c)
122{
123 return (c < ' ' || c > '~') ? '.' : c;
124}
125
126static int ivm_findinventorystring (int type,
127 unsigned char* const string,
128 unsigned long maxlen,
129 unsigned char *buf)
130{
131 int xcode = 0;
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 */
137
138 memset(string, '\0', maxlen);
139 switch (type) {
140 case IVM_POS_SYMBOL_ONLY:
141 nr = 0;
142 stop= 1;
143 break;
144 default:
145 nr = type;
146 stop = 0;
147 }
148
149 /* Look for the requested number of CR. */
150 while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
151 if ((buf[addr] == '\r')) {
152 cr++;
153 }
154 addr++;
155 }
156
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++)
165 {
166 size += sprintf((char *)string + size, "%c",
167 convert_char (buf[addr]));
168 }
169
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) {
174 xcode = -1;
175 printf ("Error end of string not found\n");
176 } else if ((size >= (maxlen - 1)) &&
177 (buf[addr] != '\r')) {
178 xcode = -1;
179 printf ("string too long till next CR\n");
180 }
181 } else {
182 /* some CR are missing...
183 * the inventory data is most probably corrupted */
184 xcode = -1;
185 printf ("not enough cr found\n");
186 }
187 return xcode;
188}
189
190#define GET_STRING(name, which, len) \
191 if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
192 ivm_set_value (name, (char *)valbuf); \
193 }
194
195static int ivm_check_crc (unsigned char *buf, int block)
196{
197 unsigned long crc;
198 unsigned long crceeprom;
199
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200200 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);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200203 if (crc != crceeprom) {
204 printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
205 block, crc, crceeprom);
206 return -1;
207 }
208 return 0;
209}
210
211static int ivm_analyze_block2 (unsigned char *buf, int len)
212{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200213 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
Heiko Schocher8f64da72008-10-15 09:41:00 +0200214 unsigned long count;
215
216 /* IVM_MacAddress */
217 sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
218 buf[1],
219 buf[2],
220 buf[3],
221 buf[4],
222 buf[5],
223 buf[6]);
224 ivm_set_value ("IVM_MacAddress", (char *)valbuf);
225 if (getenv ("ethaddr") == NULL)
226 setenv ((char *)"ethaddr", (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
239int ivm_analyze_eeprom (unsigned char *buf, int len)
240{
241 unsigned short val;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200242 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
Heiko Schocher8f64da72008-10-15 09:41:00 +0200243 unsigned char *tmp;
244
245 if (ivm_check_crc (buf, 0) != 0)
246 return -1;
247
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200248 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);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200250 if (val != 0xffff) {
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);
255 }
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200256 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200257
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");
261 if (tmp) {
262 int len = strlen ((char *)tmp);
263 int i = 0;
264
265 while (i < len) {
266 if (tmp[i] == ';') {
267 ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
268 break;
269 }
270 i++;
271 }
272 if (i >= len)
273 ivm_set_value ("IVM_ShortText", NULL);
274 } else {
275 ivm_set_value ("IVM_ShortText", NULL);
276 }
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)
286
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200287 if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
Heiko Schocher8f64da72008-10-15 09:41:00 +0200288 return -2;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200289 ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200290
291 return 0;
292}
293
294int ivm_read_eeprom (void)
295{
296 I2C_MUX_DEVICE *dev = NULL;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200297 uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
Heiko Schocher8f64da72008-10-15 09:41:00 +0200298 uchar *buf;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200299 unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
Heiko Schocher8f64da72008-10-15 09:41:00 +0200300
301 /* First init the Bus, select the Bus */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200302#if defined(CONFIG_SYS_I2C_IVM_BUS)
303 dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200304#else
305 buf = (unsigned char *) getenv ("EEprom_ivm");
306 if (buf != NULL)
307 dev = i2c_mux_ident_muxstring (buf);
308#endif
309 if (dev == NULL) {
310 printf ("Error couldnt add Bus for IVM\n");
311 return -1;
312 }
313 i2c_set_bus_num (dev->busid);
314
315 buf = (unsigned char *) getenv ("EEprom_ivm_addr");
316 if (buf != NULL)
317 dev_addr = simple_strtoul ((char *)buf, NULL, 16);
318
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200319 if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
Heiko Schocher8f64da72008-10-15 09:41:00 +0200320 printf ("Error reading EEprom\n");
321 return -2;
322 }
323
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200324 return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
Heiko Schocher8f64da72008-10-15 09:41:00 +0200325}
326
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200327#if defined(CONFIG_SYS_I2C_INIT_BOARD)
Heiko Schocherc2485362008-10-15 09:39:08 +0200328#define DELAY_ABORT_SEQ 62
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200329#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
Heiko Schocherc2485362008-10-15 09:39:08 +0200330
331#if defined(CONFIG_MGCOGE)
332#define SDA_MASK 0x00010000
333#define SCL_MASK 0x00020000
334static void set_pin (int state, unsigned long mask)
335{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200336 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
Heiko Schocherc2485362008-10-15 09:39:08 +0200337
338 if (state)
339 iop->pdat |= (mask);
340 else
341 iop->pdat &= ~(mask);
342
343 iop->pdir |= (mask);
344}
345
346static int get_pin (unsigned long mask)
347{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200348 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
Heiko Schocherc2485362008-10-15 09:39:08 +0200349
350 iop->pdir &= ~(mask);
351 return (0 != (iop->pdat & (mask)));
352}
353
354static void set_sda (int state)
355{
356 set_pin (state, SDA_MASK);
357}
358
359static void set_scl (int state)
360{
361 set_pin (state, SCL_MASK);
362}
363
364static int get_sda (void)
365{
366 return get_pin (SDA_MASK);
367}
368
369static int get_scl (void)
370{
371 return get_pin (SCL_MASK);
372}
373
374#if defined(CONFIG_HARD_I2C)
375static void setports (int gpio)
376{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200377 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
Heiko Schocherc2485362008-10-15 09:39:08 +0200378
379 if (gpio) {
380 iop->ppar &= ~(SDA_MASK | SCL_MASK);
381 iop->podr &= ~(SDA_MASK | SCL_MASK);
382 } else {
383 iop->ppar |= (SDA_MASK | SCL_MASK);
384 iop->pdir &= ~(SDA_MASK | SCL_MASK);
385 iop->podr |= (SDA_MASK | SCL_MASK);
386 }
387}
388#endif
389#endif
390
391#if defined(CONFIG_MGSUVD)
392static void set_sda (int state)
393{
394 I2C_SDA(state);
395}
396
397static void set_scl (int state)
398{
399 I2C_SCL(state);
400}
401
402static int get_sda (void)
403{
Heiko Schochera21ca952008-10-17 13:52:51 +0200404 return I2C_READ;
Heiko Schocherc2485362008-10-15 09:39:08 +0200405}
406
407static int get_scl (void)
408{
409 int val;
410
411 *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF;
412 udelay (1);
413 val = *(unsigned char *)(I2C_BASE_PORT);
414
415 return ((val & SCL_BIT) == SCL_BIT);
416}
417
418#endif
419
420static void writeStartSeq (void)
421{
422 set_sda (1);
423 udelay (DELAY_HALF_PERIOD);
424 set_scl (1);
425 udelay (DELAY_HALF_PERIOD);
426 set_sda (0);
427 udelay (DELAY_HALF_PERIOD);
428 set_scl (0);
429 udelay (DELAY_HALF_PERIOD);
430}
431
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.
438 */
439static int i2c_make_abort (void)
440{
441 int scl_state = 0;
442 int sda_state = 0;
443 int i = 0;
444 int ret = 0;
445
446 if (!get_sda ()) {
447 ret = -1;
448 while (i < 16) {
449 i++;
450 set_scl (0);
451 udelay (DELAY_ABORT_SEQ);
452 set_scl (1);
453 udelay (DELAY_ABORT_SEQ);
454 scl_state = get_scl ();
455 sda_state = get_sda ();
456 if (scl_state && sda_state) {
457 ret = 0;
458 break;
459 }
460 }
461 }
462 if (ret == 0) {
463 for (i =0; i < 5; i++) {
464 writeStartSeq ();
465 }
466 }
467 get_sda ();
468 return ret;
469}
470
471/**
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.
474 */
475void i2c_init_board(void)
476{
477#if defined(CONFIG_HARD_I2C)
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200478 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
Heiko Schocherc2485362008-10-15 09:39:08 +0200479 volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
480
481 /* disable I2C controller first, otherwhise it thinks we want to */
482 /* talk to the slave port... */
483 i2c->i2c_i2mod &= ~0x01;
484
485 /* Set the PortPins to GPIO */
486 setports (1);
487#endif
488
489 /* Now run the AbortSequence() */
490 i2c_make_abort ();
491
492#if defined(CONFIG_HARD_I2C)
493 /* Set the PortPins back to use for I2C */
494 setports (0);
495#endif
496}
497#endif