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 */