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 #define DISP_LINE_LEN 16
135 /* TODO: Implement architecture-specific get/set functions */
136 unsigned int __def_i2c_get_bus_speed(void)
138 return CONFIG_SYS_I2C_SPEED;
140 unsigned int i2c_get_bus_speed(void)
141 __attribute__((weak, alias("__def_i2c_get_bus_speed")));
143 int __def_i2c_set_bus_speed(unsigned int speed)
145 if (speed != CONFIG_SYS_I2C_SPEED)
150 int i2c_set_bus_speed(unsigned int)
151 __attribute__((weak, alias("__def_i2c_set_bus_speed")));
154 * get_alen: small parser helper function to get address length
155 * returns the address length,or 0 on error
157 static uint get_alen(char *arg)
163 for (j = 0; j < 8; j++) {
165 alen = arg[j+1] - '0';
170 } else if (arg[j] == '\0')
178 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
181 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
184 uint devaddr, alen, length;
195 chip = simple_strtoul(argv[1], NULL, 16);
198 * I2C data address within the chip. This can be 1 or
199 * 2 bytes long. Some day it might be 3 bytes long :-).
201 devaddr = simple_strtoul(argv[2], NULL, 16);
202 alen = get_alen(argv[2]);
209 * Length is the number of objects, not number of bytes.
211 length = simple_strtoul(argv[3], NULL, 16);
214 * memaddr is the address where to store things in memory
216 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
218 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
219 puts ("Error reading the chip.\n");
227 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
229 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
232 uint addr, alen, length;
233 int j, nbytes, linebytes;
235 /* We use the last specified parameters, unless new ones are
238 chip = i2c_dp_last_chip;
239 addr = i2c_dp_last_addr;
240 alen = i2c_dp_last_alen;
241 length = i2c_dp_last_length;
248 if ((flag & CMD_FLAG_REPEAT) == 0) {
250 * New command specified.
256 chip = simple_strtoul(argv[1], NULL, 16);
259 * I2C data address within the chip. This can be 1 or
260 * 2 bytes long. Some day it might be 3 bytes long :-).
262 addr = simple_strtoul(argv[2], NULL, 16);
263 alen = get_alen(argv[2]);
270 * If another parameter, it is the length to display.
271 * Length is the number of objects, not number of bytes.
274 length = simple_strtoul(argv[3], NULL, 16);
280 * We buffer all read data, so we can make sure data is read only
285 unsigned char linebuf[DISP_LINE_LEN];
288 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
290 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
291 puts ("Error reading the chip.\n");
293 printf("%04x:", addr);
295 for (j=0; j<linebytes; j++) {
296 printf(" %02x", *cp++);
301 for (j=0; j<linebytes; j++) {
302 if ((*cp < 0x20) || (*cp > 0x7e))
311 } while (nbytes > 0);
313 i2c_dp_last_chip = chip;
314 i2c_dp_last_addr = addr;
315 i2c_dp_last_alen = alen;
316 i2c_dp_last_length = length;
322 /* Write (fill) memory
325 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
327 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
335 if ((argc < 4) || (argc > 5)) {
341 * Chip is always specified.
343 chip = simple_strtoul(argv[1], NULL, 16);
346 * Address is always specified.
348 addr = simple_strtoul(argv[2], NULL, 16);
349 alen = get_alen(argv[2]);
356 * Value to write is always specified.
358 byte = simple_strtoul(argv[3], NULL, 16);
364 count = simple_strtoul(argv[4], NULL, 16);
368 while (count-- > 0) {
369 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
370 puts ("Error writing the chip.\n");
372 * Wait for the write to complete. The write can take
373 * up to 10mSec (we allow a little more time).
376 * No write delay with FRAM devices.
378 #if !defined(CONFIG_SYS_I2C_FRAM)
386 /* Calculate a CRC on memory
389 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
391 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
407 * Chip is always specified.
409 chip = simple_strtoul(argv[1], NULL, 16);
412 * Address is always specified.
414 addr = simple_strtoul(argv[2], NULL, 16);
415 alen = get_alen(argv[2]);
422 * Count is always specified
424 count = simple_strtoul(argv[3], NULL, 16);
426 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
428 * CRC a byte at a time. This is going to be slooow, but hey, the
429 * memories are small and slow too so hopefully nobody notices.
433 while (count-- > 0) {
434 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
436 crc = crc32 (crc, &byte, 1);
440 puts ("Error reading the chip,\n");
442 printf ("%08lx\n", crc);
450 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
451 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
455 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
463 extern char console_buffer[];
470 #ifdef CONFIG_BOOT_RETRY_TIME
471 reset_cmd_timeout(); /* got a good command to get here */
474 * We use the last specified parameters, unless new ones are
477 chip = i2c_mm_last_chip;
478 addr = i2c_mm_last_addr;
479 alen = i2c_mm_last_alen;
481 if ((flag & CMD_FLAG_REPEAT) == 0) {
483 * New command specified. Check for a size specification.
484 * Defaults to byte if no or incorrect specification.
486 size = cmd_get_data_size(argv[0], 1);
489 * Chip is always specified.
491 chip = simple_strtoul(argv[1], NULL, 16);
494 * Address is always specified.
496 addr = simple_strtoul(argv[2], NULL, 16);
497 alen = get_alen(argv[2]);
505 * Print the address, followed by value. Then accept input for
506 * the next value. A non-converted value exits.
509 printf("%08lx:", addr);
510 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
511 puts ("\nError reading the chip,\n");
513 data = cpu_to_be32(data);
515 printf(" %02lx", (data >> 24) & 0x000000FF);
517 printf(" %04lx", (data >> 16) & 0x0000FFFF);
519 printf(" %08lx", data);
522 nbytes = readline (" ? ");
525 * <CR> pressed as only input, don't modify current
526 * location and move to next.
531 #ifdef CONFIG_BOOT_RETRY_TIME
532 reset_cmd_timeout(); /* good enough to not time out */
535 #ifdef CONFIG_BOOT_RETRY_TIME
536 else if (nbytes == -2)
537 break; /* timed out, exit the command */
542 data = simple_strtoul(console_buffer, &endp, 16);
547 data = be32_to_cpu(data);
548 nbytes = endp - console_buffer;
550 #ifdef CONFIG_BOOT_RETRY_TIME
552 * good enough to not time out
556 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
557 puts ("Error writing the chip.\n");
558 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
559 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
567 i2c_mm_last_chip = chip;
568 i2c_mm_last_addr = addr;
569 i2c_mm_last_alen = alen;
576 * i2c probe {addr}{.0, .1, .2}
578 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
581 #if defined(CONFIG_SYS_I2C_NOPROBES)
583 uchar bus = GET_BUS_NUM;
584 #endif /* NOPROBES */
586 puts ("Valid chip addresses:");
587 for (j = 0; j < 128; j++) {
588 #if defined(CONFIG_SYS_I2C_NOPROBES)
590 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
591 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
599 if (i2c_probe(j) == 0)
604 #if defined(CONFIG_SYS_I2C_NOPROBES)
605 puts ("Excluded chip addresses:");
606 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
607 if (COMPARE_BUS(bus,k))
608 printf(" %02X", NO_PROBE_ADDR(k));
618 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
619 * {length} - Number of bytes to read
620 * {delay} - A DECIMAL number and defaults to 1000 uSec
622 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
637 * Chip is always specified.
639 chip = simple_strtoul(argv[1], NULL, 16);
642 * Address is always specified.
644 addr = simple_strtoul(argv[2], NULL, 16);
645 alen = get_alen(argv[2]);
652 * Length is the number of objects, not number of bytes.
655 length = simple_strtoul(argv[3], NULL, 16);
656 if (length > sizeof(bytes))
657 length = sizeof(bytes);
660 * The delay time (uSec) is optional.
664 delay = simple_strtoul(argv[4], NULL, 10);
669 if (i2c_read(chip, addr, alen, bytes, length) != 0)
670 puts ("Error reading the chip.\n");
679 * The SDRAM command is separately configured because many
680 * (most?) embedded boards don't use SDRAM DIMMs.
682 #if defined(CONFIG_CMD_SDRAM)
683 static void print_ddr2_tcyc (u_char const b)
685 printf ("%d.", (b >> 4) & 0x0F);
697 printf ("%d ns\n", b & 0x0F);
717 static void decode_bits (u_char const b, char const *str[], int const do_once)
721 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
732 * i2c sdram {i2c_chip}
734 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
736 enum { unknown, EDO, SDRAM, DDR2 } type;
743 static const char *decode_CAS_DDR2[] = {
744 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
747 static const char *decode_CAS_default[] = {
748 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
751 static const char *decode_CS_WE_default[] = {
752 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
755 static const char *decode_byte21_default[] = {
757 " Redundant row address\n",
758 " Differential clock input\n",
759 " Registerd DQMB inputs\n",
760 " Buffered DQMB inputs\n",
762 " Registered address/control lines\n",
763 " Buffered address/control lines\n"
766 static const char *decode_byte22_DDR2[] = {
772 " Supports partial array self refresh\n",
773 " Supports 50 ohm ODT\n",
774 " Supports weak driver\n"
777 static const char *decode_row_density_DDR2[] = {
778 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
779 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
782 static const char *decode_row_density_default[] = {
783 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
784 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
792 * Chip is always specified.
794 chip = simple_strtoul (argv[1], NULL, 16);
796 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
797 puts ("No SDRAM Serial Presence Detect found.\n");
802 for (j = 0; j < 63; j++) {
805 if (cksum != data[63]) {
806 printf ("WARNING: Configuration data checksum failure:\n"
807 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
809 printf ("SPD data revision %d.%d\n",
810 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
811 printf ("Bytes used 0x%02X\n", data[0]);
812 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
814 puts ("Memory type ");
834 puts ("Row address bits ");
835 if ((data[3] & 0x00F0) == 0)
836 printf ("%d\n", data[3] & 0x0F);
838 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
840 puts ("Column address bits ");
841 if ((data[4] & 0x00F0) == 0)
842 printf ("%d\n", data[4] & 0x0F);
844 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
848 printf ("Number of ranks %d\n",
849 (data[5] & 0x07) + 1);
852 printf ("Module rows %d\n", data[5]);
858 printf ("Module data width %d bits\n", data[6]);
861 printf ("Module data width %d bits\n",
862 (data[7] << 8) | data[6]);
866 puts ("Interface signal levels ");
868 case 0: puts ("TTL 5.0 V\n"); break;
869 case 1: puts ("LVTTL\n"); break;
870 case 2: puts ("HSTL 1.5 V\n"); break;
871 case 3: puts ("SSTL 3.3 V\n"); break;
872 case 4: puts ("SSTL 2.5 V\n"); break;
873 case 5: puts ("SSTL 1.8 V\n"); break;
874 default: puts ("unknown\n"); break;
879 printf ("SDRAM cycle time ");
880 print_ddr2_tcyc (data[9]);
883 printf ("SDRAM cycle time %d.%d ns\n",
884 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
890 printf ("SDRAM access time 0.%d%d ns\n",
891 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
894 printf ("SDRAM access time %d.%d ns\n",
895 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
899 puts ("EDC configuration ");
901 case 0: puts ("None\n"); break;
902 case 1: puts ("Parity\n"); break;
903 case 2: puts ("ECC\n"); break;
904 default: puts ("unknown\n"); break;
907 if ((data[12] & 0x80) == 0)
908 puts ("No self refresh, rate ");
910 puts ("Self refresh, rate ");
912 switch(data[12] & 0x7F) {
913 case 0: puts ("15.625 us\n"); break;
914 case 1: puts ("3.9 us\n"); break;
915 case 2: puts ("7.8 us\n"); break;
916 case 3: puts ("31.3 us\n"); break;
917 case 4: puts ("62.5 us\n"); break;
918 case 5: puts ("125 us\n"); break;
919 default: puts ("unknown\n"); break;
924 printf ("SDRAM width (primary) %d\n", data[13]);
927 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
928 if ((data[13] & 0x80) != 0) {
929 printf (" (second bank) %d\n",
930 2 * (data[13] & 0x7F));
938 printf ("EDC width %d\n", data[14]);
942 printf ("EDC width %d\n",
945 if ((data[14] & 0x80) != 0) {
946 printf (" (second bank) %d\n",
947 2 * (data[14] & 0x7F));
954 printf ("Min clock delay, back-to-back random column addresses "
958 puts ("Burst length(s) ");
959 if (data[16] & 0x80) puts (" Page");
960 if (data[16] & 0x08) puts (" 8");
961 if (data[16] & 0x04) puts (" 4");
962 if (data[16] & 0x02) puts (" 2");
963 if (data[16] & 0x01) puts (" 1");
965 printf ("Number of banks %d\n", data[17]);
969 puts ("CAS latency(s) ");
970 decode_bits (data[18], decode_CAS_DDR2, 0);
974 puts ("CAS latency(s) ");
975 decode_bits (data[18], decode_CAS_default, 0);
981 puts ("CS latency(s) ");
982 decode_bits (data[19], decode_CS_WE_default, 0);
987 puts ("WE latency(s) ");
988 decode_bits (data[20], decode_CS_WE_default, 0);
994 puts ("Module attributes:\n");
996 puts (" TBD (bit 7)\n");
998 puts (" Analysis probe installed\n");
1000 puts (" TBD (bit 5)\n");
1001 if (data[21] & 0x10)
1002 puts (" FET switch external enable\n");
1003 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1004 if (data[20] & 0x11) {
1005 printf (" %d active registers on DIMM\n",
1006 (data[21] & 0x03) + 1);
1010 puts ("Module attributes:\n");
1014 decode_bits (data[21], decode_byte21_default, 0);
1020 decode_bits (data[22], decode_byte22_DDR2, 0);
1023 puts ("Device attributes:\n");
1024 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1025 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1026 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1027 else puts (" Upper Vcc tolerance 10%\n");
1028 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1029 else puts (" Lower Vcc tolerance 10%\n");
1030 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1031 if (data[22] & 0x04) puts (" Supports precharge all\n");
1032 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1033 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1039 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1040 print_ddr2_tcyc (data[23]);
1043 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1044 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1050 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1051 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1054 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1055 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1061 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1062 print_ddr2_tcyc (data[25]);
1065 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1066 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1072 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1073 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1076 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1077 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1083 printf ("Minimum row precharge %d.%02d ns\n",
1084 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1087 printf ("Minimum row precharge %d ns\n", data[27]);
1093 printf ("Row active to row active min %d.%02d ns\n",
1094 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1097 printf ("Row active to row active min %d ns\n", data[28]);
1103 printf ("RAS to CAS delay min %d.%02d ns\n",
1104 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1107 printf ("RAS to CAS delay min %d ns\n", data[29]);
1111 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1115 puts ("Density of each row ");
1116 decode_bits (data[31], decode_row_density_DDR2, 1);
1120 puts ("Density of each row ");
1121 decode_bits (data[31], decode_row_density_default, 1);
1128 puts ("Command and Address setup ");
1129 if (data[32] >= 0xA0) {
1130 printf ("1.%d%d ns\n",
1131 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1133 printf ("0.%d%d ns\n",
1134 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1138 printf ("Command and Address setup %c%d.%d ns\n",
1139 (data[32] & 0x80) ? '-' : '+',
1140 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1146 puts ("Command and Address hold ");
1147 if (data[33] >= 0xA0) {
1148 printf ("1.%d%d ns\n",
1149 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1151 printf ("0.%d%d ns\n",
1152 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1156 printf ("Command and Address hold %c%d.%d ns\n",
1157 (data[33] & 0x80) ? '-' : '+',
1158 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1164 printf ("Data signal input setup 0.%d%d ns\n",
1165 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1168 printf ("Data signal input setup %c%d.%d ns\n",
1169 (data[34] & 0x80) ? '-' : '+',
1170 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1176 printf ("Data signal input hold 0.%d%d ns\n",
1177 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1180 printf ("Data signal input hold %c%d.%d ns\n",
1181 (data[35] & 0x80) ? '-' : '+',
1182 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1186 puts ("Manufacturer's JEDEC ID ");
1187 for (j = 64; j <= 71; j++)
1188 printf ("%02X ", data[j]);
1190 printf ("Manufacturing Location %02X\n", data[72]);
1191 puts ("Manufacturer's Part Number ");
1192 for (j = 73; j <= 90; j++)
1193 printf ("%02X ", data[j]);
1195 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1196 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1197 puts ("Assembly Serial Number ");
1198 for (j = 95; j <= 98; j++)
1199 printf ("%02X ", data[j]);
1203 printf ("Speed rating PC%d\n",
1204 data[126] == 0x66 ? 66 : data[126]);
1210 #if defined(CONFIG_I2C_MUX)
1211 static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1216 /* show all busses */
1218 I2C_MUX_DEVICE *device = i2c_mux_devices;
1220 printf ("Busses reached over muxes:\n");
1221 while (device != NULL) {
1222 printf ("Bus ID: %x\n", device->busid);
1223 printf (" reached over Mux(es):\n");
1225 while (mux != NULL) {
1226 printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel);
1229 device = device->next;
1232 I2C_MUX_DEVICE *dev;
1234 dev = i2c_mux_ident_muxstring ((uchar *)argv[1]);
1239 #endif /* CONFIG_I2C_MUX */
1241 #if defined(CONFIG_I2C_MULTI_BUS)
1242 static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1247 /* querying current setting */
1248 printf("Current bus is %d\n", i2c_get_bus_num());
1250 bus_idx = simple_strtoul(argv[1], NULL, 10);
1251 printf("Setting bus to %d\n", bus_idx);
1252 ret = i2c_set_bus_num(bus_idx);
1254 printf("Failure changing bus number (%d)\n", ret);
1258 #endif /* CONFIG_I2C_MULTI_BUS */
1260 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1265 /* querying current speed */
1266 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1268 speed = simple_strtoul(argv[1], NULL, 10);
1269 printf("Setting bus speed to %d Hz\n", speed);
1270 ret = i2c_set_bus_speed(speed);
1272 printf("Failure changing bus speed (%d)\n", ret);
1277 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1279 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1282 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1284 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1287 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1289 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1293 static cmd_tbl_t cmd_i2c_sub[] = {
1294 #if defined(CONFIG_I2C_MUX)
1295 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
1296 #endif /* CONFIG_I2C_MUX */
1297 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1298 #if defined(CONFIG_I2C_MULTI_BUS)
1299 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1300 #endif /* CONFIG_I2C_MULTI_BUS */
1301 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1302 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1303 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1304 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1305 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1306 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1307 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1308 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1309 #if defined(CONFIG_CMD_SDRAM)
1310 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1312 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1315 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1319 /* Strip off leading 'i2c' command argument */
1323 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1326 return c->cmd(cmdtp, flag, argc, argv);
1333 /***************************************************/
1338 #if defined(CONFIG_I2C_MUX)
1339 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1340 #endif /* CONFIG_I2C_MUX */
1341 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1342 #if defined(CONFIG_I2C_MULTI_BUS)
1343 "i2c dev [dev] - show or set current I2C bus\n"
1344 #endif /* CONFIG_I2C_MULTI_BUS */
1345 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1346 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1347 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1348 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1349 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1350 "i2c probe - show devices on the I2C bus\n"
1351 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1352 "i2c reset - re-init the I2C Controller\n"
1353 #if defined(CONFIG_CMD_SDRAM)
1354 "i2c sdram chip - print SDRAM configuration information\n"
1356 "i2c speed [speed] - show or set I2C bus speed"
1359 #if defined(CONFIG_I2C_MUX)
1360 static int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
1362 I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
1364 if (i2c_mux_devices == NULL) {
1365 i2c_mux_devices = dev;
1368 while (devtmp->next != NULL)
1369 devtmp = devtmp->next;
1375 I2C_MUX_DEVICE *i2c_mux_search_device(int id)
1377 I2C_MUX_DEVICE *device = i2c_mux_devices;
1379 while (device != NULL) {
1380 if (device->busid == id)
1382 device = device->next;
1387 /* searches in the buf from *pos the next ':'.
1389 * 0 if found (with *pos = where)
1390 * < 0 if an error occured
1391 * > 0 if the end of buf is reached
1393 static int i2c_mux_search_next (int *pos, uchar *buf, int len)
1395 while ((buf[*pos] != ':') && (*pos < len)) {
1400 if (buf[*pos] != ':')
1405 static int i2c_mux_get_busid (void)
1407 int tmp = i2c_mux_busid;
1413 /* Analyses a Muxstring and sends immediately the
1414 Commands to the Muxes. Runs from Flash.
1416 int i2c_mux_ident_muxstring_f (uchar *buf)
1421 int len = strlen((char *)buf);
1429 ret = i2c_mux_search_next(&pos, buf, len);
1432 /* search address */
1435 ret = i2c_mux_search_next(&pos, buf, len);
1439 chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1441 /* search channel */
1444 ret = i2c_mux_search_next(&pos, buf, len);
1448 if (buf[pos] != 0) {
1452 channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1455 if (i2c_write(chip, 0, 0, &channel, 1) != 0) {
1456 printf ("Error setting Mux: chip:%x channel: \
1457 %x\n", chip, channel);
1468 /* Analyses a Muxstring and if this String is correct
1469 * adds a new I2C Bus.
1471 I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf)
1473 I2C_MUX_DEVICE *device;
1478 int len = strlen((char *)buf);
1481 device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE));
1483 device->busid = i2c_mux_get_busid ();
1484 device->next = NULL;
1486 mux = (I2C_MUX *)malloc (sizeof(I2C_MUX));
1488 /* search name of mux */
1490 ret = i2c_mux_search_next(&pos, buf, len);
1492 printf ("%s no name.\n", __FUNCTION__);
1493 mux->name = (char *)malloc (pos - oldpos + 1);
1494 memcpy (mux->name, &buf[oldpos], pos - oldpos);
1495 mux->name[pos - oldpos] = 0;
1496 /* search address */
1499 ret = i2c_mux_search_next(&pos, buf, len);
1501 printf ("%s no mux address.\n", __FUNCTION__);
1503 mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1505 /* search channel */
1508 ret = i2c_mux_search_next(&pos, buf, len);
1510 printf ("%s no mux channel.\n", __FUNCTION__);
1512 if (buf[pos] != 0) {
1516 mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1519 if (device->mux == NULL)
1522 I2C_MUX *muxtmp = device->mux;
1523 while (muxtmp->next != NULL) {
1524 muxtmp = muxtmp->next;
1533 i2c_mux_add_device (device);
1540 int i2x_mux_select_mux(int bus)
1542 I2C_MUX_DEVICE *dev;
1545 if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) {
1546 /* select Default Mux Bus */
1547 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1548 i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
1552 buf = (unsigned char *) getenv("EEprom_ivm");
1554 i2c_mux_ident_muxstring_f (buf);
1559 dev = i2c_mux_search_device(bus);
1564 while (mux != NULL) {
1565 if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
1566 printf ("Error setting Mux: chip:%x channel: \
1567 %x\n", mux->chip, mux->channel);
1574 #endif /* CONFIG_I2C_MUX */