3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
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,
25 * I2C Functions similar to the standard memory functions.
27 * There are several parameters in many of the commands that bear further
30 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
31 * Each I2C chip on the bus has a unique address. On the I2C data bus,
32 * the address is the upper seven bits and the LSB is the "read/write"
33 * bit. Note that the {i2c_chip} address specified on the command
34 * line is not shifted up: e.g. a typical EEPROM memory chip may have
35 * an I2C address of 0x50, but the data put on the bus will be 0xA0
36 * for write and 0xA1 for read. This "non shifted" address notation
37 * matches at least half of the data sheets :-/.
39 * {addr} is the address (or offset) within the chip. Small memory
40 * chips have 8 bit addresses. Large memory chips have 16 bit
41 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
42 * Many non-memory chips have multiple registers and {addr} is used
43 * as the register index. Some non-memory chips have only one register
44 * and therefore don't need any {addr} parameter.
46 * The default {addr} parameter is one byte (.1) which works well for
47 * memories and registers with 8 bits of address space.
49 * You can specify the length of the {addr} field with the optional .0,
50 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
51 * manipulating a single register device which doesn't use an address
52 * field, use "0.0" for the address and the ".0" length field will
53 * suppress the address in the I2C data stream. This also works for
54 * successive reads using the I2C auto-incrementing memory pointer.
56 * If you are manipulating a large memory with 2-byte addresses, use
57 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
59 * Then there are the unfortunate memory chips that spill the most
60 * significant 1, 2, or 3 bits of address into the chip address byte.
61 * This effectively makes one chip (logically) look like 2, 4, or
62 * 8 chips. This is handled (awkwardly) by #defining
63 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
64 * {addr} field (since .1 is the default, it doesn't actually have to
65 * be specified). Examples: given a memory chip at I2C chip address
66 * 0x50, the following would happen...
67 * i2c md 50 0 10 display 16 bytes starting at 0x000
68 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
69 * i2c md 50 100 10 display 16 bytes starting at 0x100
70 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
71 * i2c md 50 210 10 display 16 bytes starting at 0x210
72 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
73 * This is awfully ugly. It would be nice if someone would think up
74 * a better way of handling this.
76 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
81 #include <environment.h>
84 #include <asm/byteorder.h>
86 /* Display values from last command.
87 * Memory modify remembered values are different from display memory.
89 static uchar i2c_dp_last_chip;
90 static uint i2c_dp_last_addr;
91 static uint i2c_dp_last_alen;
92 static uint i2c_dp_last_length = 0x10;
94 static uchar i2c_mm_last_chip;
95 static uint i2c_mm_last_addr;
96 static uint i2c_mm_last_alen;
98 /* If only one I2C bus is present, the list of devices to ignore when
99 * the probe command is issued is represented by a 1D array of addresses.
100 * When multiple buses are present, the list is an array of bus-address
101 * pairs. The following macros take care of this */
103 #if defined(CONFIG_SYS_I2C_NOPROBES)
104 #if defined(CONFIG_I2C_MULTI_BUS)
109 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
110 #define GET_BUS_NUM i2c_get_bus_num()
111 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
112 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
113 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
114 #else /* single bus */
115 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
116 #define GET_BUS_NUM 0
117 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
118 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
119 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
120 #endif /* CONFIG_MULTI_BUS */
122 #define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0]))
125 #if defined(CONFIG_I2C_MUX)
126 static I2C_MUX_DEVICE *i2c_mux_devices = NULL;
127 static int i2c_mux_busid = CONFIG_SYS_MAX_I2C_BUS;
129 DECLARE_GLOBAL_DATA_PTR;
133 /* TODO: Implement architecture-specific get/set functions */
134 unsigned int __def_i2c_get_bus_speed(void)
136 return CONFIG_SYS_I2C_SPEED;
138 unsigned int i2c_get_bus_speed(void)
139 __attribute__((weak, alias("__def_i2c_get_bus_speed")));
141 int __def_i2c_set_bus_speed(unsigned int speed)
143 if (speed != CONFIG_SYS_I2C_SPEED)
148 int i2c_set_bus_speed(unsigned int)
149 __attribute__((weak, alias("__def_i2c_set_bus_speed")));
153 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
155 #define DISP_LINE_LEN 16
157 int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
160 uint addr, alen, length;
161 int j, nbytes, linebytes;
163 /* We use the last specified parameters, unless new ones are
166 chip = i2c_dp_last_chip;
167 addr = i2c_dp_last_addr;
168 alen = i2c_dp_last_alen;
169 length = i2c_dp_last_length;
176 if ((flag & CMD_FLAG_REPEAT) == 0) {
178 * New command specified.
185 chip = simple_strtoul(argv[1], NULL, 16);
188 * I2C data address within the chip. This can be 1 or
189 * 2 bytes long. Some day it might be 3 bytes long :-).
191 addr = simple_strtoul(argv[2], NULL, 16);
193 for (j = 0; j < 8; j++) {
194 if (argv[2][j] == '.') {
195 alen = argv[2][j+1] - '0';
201 } else if (argv[2][j] == '\0')
206 * If another parameter, it is the length to display.
207 * Length is the number of objects, not number of bytes.
210 length = simple_strtoul(argv[3], NULL, 16);
216 * We buffer all read data, so we can make sure data is read only
221 unsigned char linebuf[DISP_LINE_LEN];
224 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
226 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
227 puts ("Error reading the chip.\n");
229 printf("%04x:", addr);
231 for (j=0; j<linebytes; j++) {
232 printf(" %02x", *cp++);
237 for (j=0; j<linebytes; j++) {
238 if ((*cp < 0x20) || (*cp > 0x7e))
247 } while (nbytes > 0);
249 i2c_dp_last_chip = chip;
250 i2c_dp_last_addr = addr;
251 i2c_dp_last_alen = alen;
252 i2c_dp_last_length = length;
258 /* Write (fill) memory
261 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
263 int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
272 if ((argc < 4) || (argc > 5)) {
278 * Chip is always specified.
280 chip = simple_strtoul(argv[1], NULL, 16);
283 * Address is always specified.
285 addr = simple_strtoul(argv[2], NULL, 16);
287 for (j = 0; j < 8; j++) {
288 if (argv[2][j] == '.') {
289 alen = argv[2][j+1] - '0';
295 } else if (argv[2][j] == '\0')
300 * Value to write is always specified.
302 byte = simple_strtoul(argv[3], NULL, 16);
308 count = simple_strtoul(argv[4], NULL, 16);
312 while (count-- > 0) {
313 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
314 puts ("Error writing the chip.\n");
316 * Wait for the write to complete. The write can take
317 * up to 10mSec (we allow a little more time).
320 * No write delay with FRAM devices.
322 #if !defined(CONFIG_SYS_I2C_FRAM)
330 /* Calculate a CRC on memory
333 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
335 int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
352 * Chip is always specified.
354 chip = simple_strtoul(argv[1], NULL, 16);
357 * Address is always specified.
359 addr = simple_strtoul(argv[2], NULL, 16);
361 for (j = 0; j < 8; j++) {
362 if (argv[2][j] == '.') {
363 alen = argv[2][j+1] - '0';
369 } else if (argv[2][j] == '\0')
374 * Count is always specified
376 count = simple_strtoul(argv[3], NULL, 16);
378 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
380 * CRC a byte at a time. This is going to be slooow, but hey, the
381 * memories are small and slow too so hopefully nobody notices.
385 while (count-- > 0) {
386 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
388 crc = crc32 (crc, &byte, 1);
392 puts ("Error reading the chip,\n");
394 printf ("%08lx\n", crc);
402 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
403 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
407 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
416 extern char console_buffer[];
423 #ifdef CONFIG_BOOT_RETRY_TIME
424 reset_cmd_timeout(); /* got a good command to get here */
427 * We use the last specified parameters, unless new ones are
430 chip = i2c_mm_last_chip;
431 addr = i2c_mm_last_addr;
432 alen = i2c_mm_last_alen;
434 if ((flag & CMD_FLAG_REPEAT) == 0) {
436 * New command specified. Check for a size specification.
437 * Defaults to byte if no or incorrect specification.
439 size = cmd_get_data_size(argv[0], 1);
442 * Chip is always specified.
444 chip = simple_strtoul(argv[1], NULL, 16);
447 * Address is always specified.
449 addr = simple_strtoul(argv[2], NULL, 16);
451 for (j = 0; j < 8; j++) {
452 if (argv[2][j] == '.') {
453 alen = argv[2][j+1] - '0';
459 } else if (argv[2][j] == '\0')
465 * Print the address, followed by value. Then accept input for
466 * the next value. A non-converted value exits.
469 printf("%08lx:", addr);
470 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
471 puts ("\nError reading the chip,\n");
473 data = cpu_to_be32(data);
475 printf(" %02lx", (data >> 24) & 0x000000FF);
477 printf(" %04lx", (data >> 16) & 0x0000FFFF);
479 printf(" %08lx", data);
482 nbytes = readline (" ? ");
485 * <CR> pressed as only input, don't modify current
486 * location and move to next.
491 #ifdef CONFIG_BOOT_RETRY_TIME
492 reset_cmd_timeout(); /* good enough to not time out */
495 #ifdef CONFIG_BOOT_RETRY_TIME
496 else if (nbytes == -2)
497 break; /* timed out, exit the command */
502 data = simple_strtoul(console_buffer, &endp, 16);
507 data = be32_to_cpu(data);
508 nbytes = endp - console_buffer;
510 #ifdef CONFIG_BOOT_RETRY_TIME
512 * good enough to not time out
516 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
517 puts ("Error writing the chip.\n");
518 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
519 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
527 i2c_mm_last_chip = chip;
528 i2c_mm_last_addr = addr;
529 i2c_mm_last_alen = alen;
536 * i2c probe {addr}{.0, .1, .2}
538 int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
541 #if defined(CONFIG_SYS_I2C_NOPROBES)
543 uchar bus = GET_BUS_NUM;
544 #endif /* NOPROBES */
546 puts ("Valid chip addresses:");
547 for (j = 0; j < 128; j++) {
548 #if defined(CONFIG_SYS_I2C_NOPROBES)
550 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
551 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
559 if (i2c_probe(j) == 0)
564 #if defined(CONFIG_SYS_I2C_NOPROBES)
565 puts ("Excluded chip addresses:");
566 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
567 if (COMPARE_BUS(bus,k))
568 printf(" %02X", NO_PROBE_ADDR(k));
578 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
579 * {length} - Number of bytes to read
580 * {delay} - A DECIMAL number and defaults to 1000 uSec
582 int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
598 * Chip is always specified.
600 chip = simple_strtoul(argv[1], NULL, 16);
603 * Address is always specified.
605 addr = simple_strtoul(argv[2], NULL, 16);
607 for (j = 0; j < 8; j++) {
608 if (argv[2][j] == '.') {
609 alen = argv[2][j+1] - '0';
615 } else if (argv[2][j] == '\0')
620 * Length is the number of objects, not number of bytes.
623 length = simple_strtoul(argv[3], NULL, 16);
624 if (length > sizeof(bytes))
625 length = sizeof(bytes);
628 * The delay time (uSec) is optional.
632 delay = simple_strtoul(argv[4], NULL, 10);
637 if (i2c_read(chip, addr, alen, bytes, length) != 0)
638 puts ("Error reading the chip.\n");
647 * The SDRAM command is separately configured because many
648 * (most?) embedded boards don't use SDRAM DIMMs.
650 #if defined(CONFIG_CMD_SDRAM)
651 static void print_ddr2_tcyc (u_char const b)
653 printf ("%d.", (b >> 4) & 0x0F);
665 printf ("%d ns\n", b & 0x0F);
685 static void decode_bits (u_char const b, char const *str[], int const do_once)
689 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
700 * i2c sdram {i2c_chip}
702 int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
704 enum { unknown, EDO, SDRAM, DDR2 } type;
711 static const char *decode_CAS_DDR2[] = {
712 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
715 static const char *decode_CAS_default[] = {
716 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
719 static const char *decode_CS_WE_default[] = {
720 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
723 static const char *decode_byte21_default[] = {
725 " Redundant row address\n",
726 " Differential clock input\n",
727 " Registerd DQMB inputs\n",
728 " Buffered DQMB inputs\n",
730 " Registered address/control lines\n",
731 " Buffered address/control lines\n"
734 static const char *decode_byte22_DDR2[] = {
740 " Supports partial array self refresh\n",
741 " Supports 50 ohm ODT\n",
742 " Supports weak driver\n"
745 static const char *decode_row_density_DDR2[] = {
746 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
747 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
750 static const char *decode_row_density_default[] = {
751 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
752 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
760 * Chip is always specified.
762 chip = simple_strtoul (argv[1], NULL, 16);
764 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
765 puts ("No SDRAM Serial Presence Detect found.\n");
770 for (j = 0; j < 63; j++) {
773 if (cksum != data[63]) {
774 printf ("WARNING: Configuration data checksum failure:\n"
775 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
777 printf ("SPD data revision %d.%d\n",
778 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
779 printf ("Bytes used 0x%02X\n", data[0]);
780 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
782 puts ("Memory type ");
802 puts ("Row address bits ");
803 if ((data[3] & 0x00F0) == 0)
804 printf ("%d\n", data[3] & 0x0F);
806 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
808 puts ("Column address bits ");
809 if ((data[4] & 0x00F0) == 0)
810 printf ("%d\n", data[4] & 0x0F);
812 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
816 printf ("Number of ranks %d\n",
817 (data[5] & 0x07) + 1);
820 printf ("Module rows %d\n", data[5]);
826 printf ("Module data width %d bits\n", data[6]);
829 printf ("Module data width %d bits\n",
830 (data[7] << 8) | data[6]);
834 puts ("Interface signal levels ");
836 case 0: puts ("TTL 5.0 V\n"); break;
837 case 1: puts ("LVTTL\n"); break;
838 case 2: puts ("HSTL 1.5 V\n"); break;
839 case 3: puts ("SSTL 3.3 V\n"); break;
840 case 4: puts ("SSTL 2.5 V\n"); break;
841 case 5: puts ("SSTL 1.8 V\n"); break;
842 default: puts ("unknown\n"); break;
847 printf ("SDRAM cycle time ");
848 print_ddr2_tcyc (data[9]);
851 printf ("SDRAM cycle time %d.%d ns\n",
852 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
858 printf ("SDRAM access time 0.%d%d ns\n",
859 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
862 printf ("SDRAM access time %d.%d ns\n",
863 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
867 puts ("EDC configuration ");
869 case 0: puts ("None\n"); break;
870 case 1: puts ("Parity\n"); break;
871 case 2: puts ("ECC\n"); break;
872 default: puts ("unknown\n"); break;
875 if ((data[12] & 0x80) == 0)
876 puts ("No self refresh, rate ");
878 puts ("Self refresh, rate ");
880 switch(data[12] & 0x7F) {
881 case 0: puts ("15.625 us\n"); break;
882 case 1: puts ("3.9 us\n"); break;
883 case 2: puts ("7.8 us\n"); break;
884 case 3: puts ("31.3 us\n"); break;
885 case 4: puts ("62.5 us\n"); break;
886 case 5: puts ("125 us\n"); break;
887 default: puts ("unknown\n"); break;
892 printf ("SDRAM width (primary) %d\n", data[13]);
895 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
896 if ((data[13] & 0x80) != 0) {
897 printf (" (second bank) %d\n",
898 2 * (data[13] & 0x7F));
906 printf ("EDC width %d\n", data[14]);
910 printf ("EDC width %d\n",
913 if ((data[14] & 0x80) != 0) {
914 printf (" (second bank) %d\n",
915 2 * (data[14] & 0x7F));
922 printf ("Min clock delay, back-to-back random column addresses "
926 puts ("Burst length(s) ");
927 if (data[16] & 0x80) puts (" Page");
928 if (data[16] & 0x08) puts (" 8");
929 if (data[16] & 0x04) puts (" 4");
930 if (data[16] & 0x02) puts (" 2");
931 if (data[16] & 0x01) puts (" 1");
933 printf ("Number of banks %d\n", data[17]);
937 puts ("CAS latency(s) ");
938 decode_bits (data[18], decode_CAS_DDR2, 0);
942 puts ("CAS latency(s) ");
943 decode_bits (data[18], decode_CAS_default, 0);
949 puts ("CS latency(s) ");
950 decode_bits (data[19], decode_CS_WE_default, 0);
955 puts ("WE latency(s) ");
956 decode_bits (data[20], decode_CS_WE_default, 0);
962 puts ("Module attributes:\n");
964 puts (" TBD (bit 7)\n");
966 puts (" Analysis probe installed\n");
968 puts (" TBD (bit 5)\n");
970 puts (" FET switch external enable\n");
971 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
972 if (data[20] & 0x11) {
973 printf (" %d active registers on DIMM\n",
974 (data[21] & 0x03) + 1);
978 puts ("Module attributes:\n");
982 decode_bits (data[21], decode_byte21_default, 0);
988 decode_bits (data[22], decode_byte22_DDR2, 0);
991 puts ("Device attributes:\n");
992 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
993 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
994 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
995 else puts (" Upper Vcc tolerance 10%\n");
996 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
997 else puts (" Lower Vcc tolerance 10%\n");
998 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
999 if (data[22] & 0x04) puts (" Supports precharge all\n");
1000 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1001 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1007 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1008 print_ddr2_tcyc (data[23]);
1011 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1012 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1018 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1019 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1022 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1023 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1029 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1030 print_ddr2_tcyc (data[25]);
1033 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1034 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1040 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1041 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1044 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1045 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1051 printf ("Minimum row precharge %d.%02d ns\n",
1052 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1055 printf ("Minimum row precharge %d ns\n", data[27]);
1061 printf ("Row active to row active min %d.%02d ns\n",
1062 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1065 printf ("Row active to row active min %d ns\n", data[28]);
1071 printf ("RAS to CAS delay min %d.%02d ns\n",
1072 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1075 printf ("RAS to CAS delay min %d ns\n", data[29]);
1079 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1083 puts ("Density of each row ");
1084 decode_bits (data[31], decode_row_density_DDR2, 1);
1088 puts ("Density of each row ");
1089 decode_bits (data[31], decode_row_density_default, 1);
1096 puts ("Command and Address setup ");
1097 if (data[32] >= 0xA0) {
1098 printf ("1.%d%d ns\n",
1099 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1101 printf ("0.%d%d ns\n",
1102 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1106 printf ("Command and Address setup %c%d.%d ns\n",
1107 (data[32] & 0x80) ? '-' : '+',
1108 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1114 puts ("Command and Address hold ");
1115 if (data[33] >= 0xA0) {
1116 printf ("1.%d%d ns\n",
1117 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1119 printf ("0.%d%d ns\n",
1120 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1124 printf ("Command and Address hold %c%d.%d ns\n",
1125 (data[33] & 0x80) ? '-' : '+',
1126 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1132 printf ("Data signal input setup 0.%d%d ns\n",
1133 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1136 printf ("Data signal input setup %c%d.%d ns\n",
1137 (data[34] & 0x80) ? '-' : '+',
1138 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1144 printf ("Data signal input hold 0.%d%d ns\n",
1145 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1148 printf ("Data signal input hold %c%d.%d ns\n",
1149 (data[35] & 0x80) ? '-' : '+',
1150 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1154 puts ("Manufacturer's JEDEC ID ");
1155 for (j = 64; j <= 71; j++)
1156 printf ("%02X ", data[j]);
1158 printf ("Manufacturing Location %02X\n", data[72]);
1159 puts ("Manufacturer's Part Number ");
1160 for (j = 73; j <= 90; j++)
1161 printf ("%02X ", data[j]);
1163 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1164 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1165 puts ("Assembly Serial Number ");
1166 for (j = 95; j <= 98; j++)
1167 printf ("%02X ", data[j]);
1171 printf ("Speed rating PC%d\n",
1172 data[126] == 0x66 ? 66 : data[126]);
1178 #if defined(CONFIG_I2C_MUX)
1179 int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1184 /* show all busses */
1186 I2C_MUX_DEVICE *device = i2c_mux_devices;
1188 printf ("Busses reached over muxes:\n");
1189 while (device != NULL) {
1190 printf ("Bus ID: %x\n", device->busid);
1191 printf (" reached over Mux(es):\n");
1193 while (mux != NULL) {
1194 printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel);
1197 device = device->next;
1200 I2C_MUX_DEVICE *dev;
1202 dev = i2c_mux_ident_muxstring ((uchar *)argv[1]);
1207 #endif /* CONFIG_I2C_MUX */
1209 #if defined(CONFIG_I2C_MULTI_BUS)
1210 int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1215 /* querying current setting */
1216 printf("Current bus is %d\n", i2c_get_bus_num());
1218 bus_idx = simple_strtoul(argv[1], NULL, 10);
1219 printf("Setting bus to %d\n", bus_idx);
1220 ret = i2c_set_bus_num(bus_idx);
1222 printf("Failure changing bus number (%d)\n", ret);
1226 #endif /* CONFIG_I2C_MULTI_BUS */
1228 int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1233 /* querying current speed */
1234 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1236 speed = simple_strtoul(argv[1], NULL, 10);
1237 printf("Setting bus speed to %d Hz\n", speed);
1238 ret = i2c_set_bus_speed(speed);
1240 printf("Failure changing bus speed (%d)\n", ret);
1245 int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1247 /* Strip off leading 'i2c' command argument */
1251 #if defined(CONFIG_I2C_MUX)
1252 if (!strncmp(argv[0], "bu", 2))
1253 return do_i2c_add_bus(cmdtp, flag, argc, argv);
1254 #endif /* CONFIG_I2C_MUX */
1255 if (!strncmp(argv[0], "sp", 2))
1256 return do_i2c_bus_speed(cmdtp, flag, argc, argv);
1257 #if defined(CONFIG_I2C_MULTI_BUS)
1258 if (!strncmp(argv[0], "de", 2))
1259 return do_i2c_bus_num(cmdtp, flag, argc, argv);
1260 #endif /* CONFIG_I2C_MULTI_BUS */
1261 if (!strncmp(argv[0], "md", 2))
1262 return do_i2c_md(cmdtp, flag, argc, argv);
1263 if (!strncmp(argv[0], "mm", 2))
1264 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1265 if (!strncmp(argv[0], "mw", 2))
1266 return do_i2c_mw(cmdtp, flag, argc, argv);
1267 if (!strncmp(argv[0], "nm", 2))
1268 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1269 if (!strncmp(argv[0], "cr", 2))
1270 return do_i2c_crc(cmdtp, flag, argc, argv);
1271 if (!strncmp(argv[0], "pr", 2))
1272 return do_i2c_probe(cmdtp, flag, argc, argv);
1273 if (!strncmp(argv[0], "re", 2)) {
1274 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1277 if (!strncmp(argv[0], "lo", 2))
1278 return do_i2c_loop(cmdtp, flag, argc, argv);
1279 #if defined(CONFIG_CMD_SDRAM)
1280 if (!strncmp(argv[0], "sd", 2))
1281 return do_sdram(cmdtp, flag, argc, argv);
1287 /***************************************************/
1292 "speed [speed] - show or set I2C bus speed\n"
1293 #if defined(CONFIG_I2C_MUX)
1294 "i2c bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\n"
1295 #endif /* CONFIG_I2C_MUX */
1296 #if defined(CONFIG_I2C_MULTI_BUS)
1297 "i2c dev [dev] - show or set current I2C bus\n"
1298 #endif /* CONFIG_I2C_MULTI_BUS */
1299 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1300 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1301 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1302 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1303 "i2c crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1304 "i2c probe - show devices on the I2C bus\n"
1305 "i2c reset - re-init the I2C Controller\n"
1306 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device"
1307 #if defined(CONFIG_CMD_SDRAM)
1309 "i2c sdram chip - print SDRAM configuration information"
1313 #if defined(CONFIG_I2C_MUX)
1315 int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
1317 I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
1319 if (i2c_mux_devices == NULL) {
1320 i2c_mux_devices = dev;
1323 while (devtmp->next != NULL)
1324 devtmp = devtmp->next;
1330 I2C_MUX_DEVICE *i2c_mux_search_device(int id)
1332 I2C_MUX_DEVICE *device = i2c_mux_devices;
1334 while (device != NULL) {
1335 if (device->busid == id)
1337 device = device->next;
1342 /* searches in the buf from *pos the next ':'.
1344 * 0 if found (with *pos = where)
1345 * < 0 if an error occured
1346 * > 0 if the end of buf is reached
1348 static int i2c_mux_search_next (int *pos, uchar *buf, int len)
1350 while ((buf[*pos] != ':') && (*pos < len)) {
1355 if (buf[*pos] != ':')
1360 static int i2c_mux_get_busid (void)
1362 int tmp = i2c_mux_busid;
1368 /* Analyses a Muxstring and sends immediately the
1369 Commands to the Muxes. Runs from Flash.
1371 int i2c_mux_ident_muxstring_f (uchar *buf)
1376 int len = strlen((char *)buf);
1384 ret = i2c_mux_search_next(&pos, buf, len);
1387 /* search address */
1390 ret = i2c_mux_search_next(&pos, buf, len);
1394 chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1396 /* search channel */
1399 ret = i2c_mux_search_next(&pos, buf, len);
1403 if (buf[pos] != 0) {
1407 channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1410 if (i2c_write(chip, 0, 0, &channel, 1) != 0) {
1411 printf ("Error setting Mux: chip:%x channel: \
1412 %x\n", chip, channel);
1423 /* Analyses a Muxstring and if this String is correct
1424 * adds a new I2C Bus.
1426 I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf)
1428 I2C_MUX_DEVICE *device;
1433 int len = strlen((char *)buf);
1436 device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE));
1438 device->busid = i2c_mux_get_busid ();
1439 device->next = NULL;
1441 mux = (I2C_MUX *)malloc (sizeof(I2C_MUX));
1443 /* search name of mux */
1445 ret = i2c_mux_search_next(&pos, buf, len);
1447 printf ("%s no name.\n", __FUNCTION__);
1448 mux->name = (char *)malloc (pos - oldpos + 1);
1449 memcpy (mux->name, &buf[oldpos], pos - oldpos);
1450 mux->name[pos - oldpos] = 0;
1451 /* search address */
1454 ret = i2c_mux_search_next(&pos, buf, len);
1456 printf ("%s no mux address.\n", __FUNCTION__);
1458 mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1460 /* search channel */
1463 ret = i2c_mux_search_next(&pos, buf, len);
1465 printf ("%s no mux channel.\n", __FUNCTION__);
1467 if (buf[pos] != 0) {
1471 mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1474 if (device->mux == NULL)
1477 I2C_MUX *muxtmp = device->mux;
1478 while (muxtmp->next != NULL) {
1479 muxtmp = muxtmp->next;
1488 i2c_mux_add_device (device);
1495 int i2x_mux_select_mux(int bus)
1497 I2C_MUX_DEVICE *dev;
1500 if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) {
1501 /* select Default Mux Bus */
1502 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1503 i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
1507 buf = (unsigned char *) getenv("EEprom_ivm");
1509 i2c_mux_ident_muxstring_f (buf);
1514 dev = i2c_mux_search_device(bus);
1519 while (mux != NULL) {
1520 if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
1521 printf ("Error setting Mux: chip:%x channel: \
1522 %x\n", mux->chip, mux->channel);
1529 #endif /* CONFIG_I2C_MUX */