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
159 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
162 int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
165 uint devaddr
, alen
, length
;
177 chip
= simple_strtoul(argv
[1], NULL
, 16);
180 * I2C data address within the chip. This can be 1 or
181 * 2 bytes long. Some day it might be 3 bytes long :-).
183 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
185 for (j
= 0; j
< 8; j
++) {
186 if (argv
[2][j
] == '.') {
187 alen
= argv
[2][j
+1] - '0';
193 } else if (argv
[2][j
] == '\0')
198 * Length is the number of objects, not number of bytes.
200 length
= simple_strtoul(argv
[3], NULL
, 16);
203 * memaddr is the address where to store things in memory
205 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
207 if (i2c_read(chip
, devaddr
, alen
, memaddr
, length
) != 0) {
208 puts ("Error reading the chip.\n");
214 int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
217 uint addr
, alen
, length
;
218 int j
, nbytes
, linebytes
;
220 /* We use the last specified parameters, unless new ones are
223 chip
= i2c_dp_last_chip
;
224 addr
= i2c_dp_last_addr
;
225 alen
= i2c_dp_last_alen
;
226 length
= i2c_dp_last_length
;
233 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
235 * New command specified.
242 chip
= simple_strtoul(argv
[1], NULL
, 16);
245 * I2C data address within the chip. This can be 1 or
246 * 2 bytes long. Some day it might be 3 bytes long :-).
248 addr
= simple_strtoul(argv
[2], NULL
, 16);
250 for (j
= 0; j
< 8; j
++) {
251 if (argv
[2][j
] == '.') {
252 alen
= argv
[2][j
+1] - '0';
258 } else if (argv
[2][j
] == '\0')
263 * If another parameter, it is the length to display.
264 * Length is the number of objects, not number of bytes.
267 length
= simple_strtoul(argv
[3], NULL
, 16);
273 * We buffer all read data, so we can make sure data is read only
278 unsigned char linebuf
[DISP_LINE_LEN
];
281 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
283 if (i2c_read(chip
, addr
, alen
, linebuf
, linebytes
) != 0)
284 puts ("Error reading the chip.\n");
286 printf("%04x:", addr
);
288 for (j
=0; j
<linebytes
; j
++) {
289 printf(" %02x", *cp
++);
294 for (j
=0; j
<linebytes
; j
++) {
295 if ((*cp
< 0x20) || (*cp
> 0x7e))
304 } while (nbytes
> 0);
306 i2c_dp_last_chip
= chip
;
307 i2c_dp_last_addr
= addr
;
308 i2c_dp_last_alen
= alen
;
309 i2c_dp_last_length
= length
;
315 /* Write (fill) memory
318 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
320 int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
329 if ((argc
< 4) || (argc
> 5)) {
335 * Chip is always specified.
337 chip
= simple_strtoul(argv
[1], NULL
, 16);
340 * Address is always specified.
342 addr
= simple_strtoul(argv
[2], NULL
, 16);
344 for (j
= 0; j
< 8; j
++) {
345 if (argv
[2][j
] == '.') {
346 alen
= argv
[2][j
+1] - '0';
352 } else if (argv
[2][j
] == '\0')
357 * Value to write is always specified.
359 byte
= simple_strtoul(argv
[3], NULL
, 16);
365 count
= simple_strtoul(argv
[4], NULL
, 16);
369 while (count
-- > 0) {
370 if (i2c_write(chip
, addr
++, alen
, &byte
, 1) != 0)
371 puts ("Error writing the chip.\n");
373 * Wait for the write to complete. The write can take
374 * up to 10mSec (we allow a little more time).
377 * No write delay with FRAM devices.
379 #if !defined(CONFIG_SYS_I2C_FRAM)
387 /* Calculate a CRC on memory
390 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
392 int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
409 * Chip is always specified.
411 chip
= simple_strtoul(argv
[1], NULL
, 16);
414 * Address is always specified.
416 addr
= simple_strtoul(argv
[2], NULL
, 16);
418 for (j
= 0; j
< 8; j
++) {
419 if (argv
[2][j
] == '.') {
420 alen
= argv
[2][j
+1] - '0';
426 } else if (argv
[2][j
] == '\0')
431 * Count is always specified
433 count
= simple_strtoul(argv
[3], NULL
, 16);
435 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
437 * CRC a byte at a time. This is going to be slooow, but hey, the
438 * memories are small and slow too so hopefully nobody notices.
442 while (count
-- > 0) {
443 if (i2c_read(chip
, addr
, alen
, &byte
, 1) != 0)
445 crc
= crc32 (crc
, &byte
, 1);
449 puts ("Error reading the chip,\n");
451 printf ("%08lx\n", crc
);
459 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
460 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
464 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char *argv
[])
473 extern char console_buffer
[];
480 #ifdef CONFIG_BOOT_RETRY_TIME
481 reset_cmd_timeout(); /* got a good command to get here */
484 * We use the last specified parameters, unless new ones are
487 chip
= i2c_mm_last_chip
;
488 addr
= i2c_mm_last_addr
;
489 alen
= i2c_mm_last_alen
;
491 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
493 * New command specified. Check for a size specification.
494 * Defaults to byte if no or incorrect specification.
496 size
= cmd_get_data_size(argv
[0], 1);
499 * Chip is always specified.
501 chip
= simple_strtoul(argv
[1], NULL
, 16);
504 * Address is always specified.
506 addr
= simple_strtoul(argv
[2], NULL
, 16);
508 for (j
= 0; j
< 8; j
++) {
509 if (argv
[2][j
] == '.') {
510 alen
= argv
[2][j
+1] - '0';
516 } else if (argv
[2][j
] == '\0')
522 * Print the address, followed by value. Then accept input for
523 * the next value. A non-converted value exits.
526 printf("%08lx:", addr
);
527 if (i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
528 puts ("\nError reading the chip,\n");
530 data
= cpu_to_be32(data
);
532 printf(" %02lx", (data
>> 24) & 0x000000FF);
534 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
536 printf(" %08lx", data
);
539 nbytes
= readline (" ? ");
542 * <CR> pressed as only input, don't modify current
543 * location and move to next.
548 #ifdef CONFIG_BOOT_RETRY_TIME
549 reset_cmd_timeout(); /* good enough to not time out */
552 #ifdef CONFIG_BOOT_RETRY_TIME
553 else if (nbytes
== -2)
554 break; /* timed out, exit the command */
559 data
= simple_strtoul(console_buffer
, &endp
, 16);
564 data
= be32_to_cpu(data
);
565 nbytes
= endp
- console_buffer
;
567 #ifdef CONFIG_BOOT_RETRY_TIME
569 * good enough to not time out
573 if (i2c_write(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
574 puts ("Error writing the chip.\n");
575 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
576 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
584 i2c_mm_last_chip
= chip
;
585 i2c_mm_last_addr
= addr
;
586 i2c_mm_last_alen
= alen
;
593 * i2c probe {addr}{.0, .1, .2}
595 int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
598 #if defined(CONFIG_SYS_I2C_NOPROBES)
600 uchar bus
= GET_BUS_NUM
;
601 #endif /* NOPROBES */
603 puts ("Valid chip addresses:");
604 for (j
= 0; j
< 128; j
++) {
605 #if defined(CONFIG_SYS_I2C_NOPROBES)
607 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
608 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
616 if (i2c_probe(j
) == 0)
621 #if defined(CONFIG_SYS_I2C_NOPROBES)
622 puts ("Excluded chip addresses:");
623 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
624 if (COMPARE_BUS(bus
,k
))
625 printf(" %02X", NO_PROBE_ADDR(k
));
635 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
636 * {length} - Number of bytes to read
637 * {delay} - A DECIMAL number and defaults to 1000 uSec
639 int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
655 * Chip is always specified.
657 chip
= simple_strtoul(argv
[1], NULL
, 16);
660 * Address is always specified.
662 addr
= simple_strtoul(argv
[2], NULL
, 16);
664 for (j
= 0; j
< 8; j
++) {
665 if (argv
[2][j
] == '.') {
666 alen
= argv
[2][j
+1] - '0';
672 } else if (argv
[2][j
] == '\0')
677 * Length is the number of objects, not number of bytes.
680 length
= simple_strtoul(argv
[3], NULL
, 16);
681 if (length
> sizeof(bytes
))
682 length
= sizeof(bytes
);
685 * The delay time (uSec) is optional.
689 delay
= simple_strtoul(argv
[4], NULL
, 10);
694 if (i2c_read(chip
, addr
, alen
, bytes
, length
) != 0)
695 puts ("Error reading the chip.\n");
704 * The SDRAM command is separately configured because many
705 * (most?) embedded boards don't use SDRAM DIMMs.
707 #if defined(CONFIG_CMD_SDRAM)
708 static void print_ddr2_tcyc (u_char
const b
)
710 printf ("%d.", (b
>> 4) & 0x0F);
722 printf ("%d ns\n", b
& 0x0F);
742 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
746 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
757 * i2c sdram {i2c_chip}
759 int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
761 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
768 static const char *decode_CAS_DDR2
[] = {
769 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
772 static const char *decode_CAS_default
[] = {
773 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
776 static const char *decode_CS_WE_default
[] = {
777 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
780 static const char *decode_byte21_default
[] = {
782 " Redundant row address\n",
783 " Differential clock input\n",
784 " Registerd DQMB inputs\n",
785 " Buffered DQMB inputs\n",
787 " Registered address/control lines\n",
788 " Buffered address/control lines\n"
791 static const char *decode_byte22_DDR2
[] = {
797 " Supports partial array self refresh\n",
798 " Supports 50 ohm ODT\n",
799 " Supports weak driver\n"
802 static const char *decode_row_density_DDR2
[] = {
803 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
804 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
807 static const char *decode_row_density_default
[] = {
808 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
809 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
817 * Chip is always specified.
819 chip
= simple_strtoul (argv
[1], NULL
, 16);
821 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
822 puts ("No SDRAM Serial Presence Detect found.\n");
827 for (j
= 0; j
< 63; j
++) {
830 if (cksum
!= data
[63]) {
831 printf ("WARNING: Configuration data checksum failure:\n"
832 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
834 printf ("SPD data revision %d.%d\n",
835 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
836 printf ("Bytes used 0x%02X\n", data
[0]);
837 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
839 puts ("Memory type ");
859 puts ("Row address bits ");
860 if ((data
[3] & 0x00F0) == 0)
861 printf ("%d\n", data
[3] & 0x0F);
863 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
865 puts ("Column address bits ");
866 if ((data
[4] & 0x00F0) == 0)
867 printf ("%d\n", data
[4] & 0x0F);
869 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
873 printf ("Number of ranks %d\n",
874 (data
[5] & 0x07) + 1);
877 printf ("Module rows %d\n", data
[5]);
883 printf ("Module data width %d bits\n", data
[6]);
886 printf ("Module data width %d bits\n",
887 (data
[7] << 8) | data
[6]);
891 puts ("Interface signal levels ");
893 case 0: puts ("TTL 5.0 V\n"); break;
894 case 1: puts ("LVTTL\n"); break;
895 case 2: puts ("HSTL 1.5 V\n"); break;
896 case 3: puts ("SSTL 3.3 V\n"); break;
897 case 4: puts ("SSTL 2.5 V\n"); break;
898 case 5: puts ("SSTL 1.8 V\n"); break;
899 default: puts ("unknown\n"); break;
904 printf ("SDRAM cycle time ");
905 print_ddr2_tcyc (data
[9]);
908 printf ("SDRAM cycle time %d.%d ns\n",
909 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
915 printf ("SDRAM access time 0.%d%d ns\n",
916 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
919 printf ("SDRAM access time %d.%d ns\n",
920 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
924 puts ("EDC configuration ");
926 case 0: puts ("None\n"); break;
927 case 1: puts ("Parity\n"); break;
928 case 2: puts ("ECC\n"); break;
929 default: puts ("unknown\n"); break;
932 if ((data
[12] & 0x80) == 0)
933 puts ("No self refresh, rate ");
935 puts ("Self refresh, rate ");
937 switch(data
[12] & 0x7F) {
938 case 0: puts ("15.625 us\n"); break;
939 case 1: puts ("3.9 us\n"); break;
940 case 2: puts ("7.8 us\n"); break;
941 case 3: puts ("31.3 us\n"); break;
942 case 4: puts ("62.5 us\n"); break;
943 case 5: puts ("125 us\n"); break;
944 default: puts ("unknown\n"); break;
949 printf ("SDRAM width (primary) %d\n", data
[13]);
952 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
953 if ((data
[13] & 0x80) != 0) {
954 printf (" (second bank) %d\n",
955 2 * (data
[13] & 0x7F));
963 printf ("EDC width %d\n", data
[14]);
967 printf ("EDC width %d\n",
970 if ((data
[14] & 0x80) != 0) {
971 printf (" (second bank) %d\n",
972 2 * (data
[14] & 0x7F));
979 printf ("Min clock delay, back-to-back random column addresses "
983 puts ("Burst length(s) ");
984 if (data
[16] & 0x80) puts (" Page");
985 if (data
[16] & 0x08) puts (" 8");
986 if (data
[16] & 0x04) puts (" 4");
987 if (data
[16] & 0x02) puts (" 2");
988 if (data
[16] & 0x01) puts (" 1");
990 printf ("Number of banks %d\n", data
[17]);
994 puts ("CAS latency(s) ");
995 decode_bits (data
[18], decode_CAS_DDR2
, 0);
999 puts ("CAS latency(s) ");
1000 decode_bits (data
[18], decode_CAS_default
, 0);
1006 puts ("CS latency(s) ");
1007 decode_bits (data
[19], decode_CS_WE_default
, 0);
1012 puts ("WE latency(s) ");
1013 decode_bits (data
[20], decode_CS_WE_default
, 0);
1019 puts ("Module attributes:\n");
1020 if (data
[21] & 0x80)
1021 puts (" TBD (bit 7)\n");
1022 if (data
[21] & 0x40)
1023 puts (" Analysis probe installed\n");
1024 if (data
[21] & 0x20)
1025 puts (" TBD (bit 5)\n");
1026 if (data
[21] & 0x10)
1027 puts (" FET switch external enable\n");
1028 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1029 if (data
[20] & 0x11) {
1030 printf (" %d active registers on DIMM\n",
1031 (data
[21] & 0x03) + 1);
1035 puts ("Module attributes:\n");
1039 decode_bits (data
[21], decode_byte21_default
, 0);
1045 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1048 puts ("Device attributes:\n");
1049 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1050 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1051 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1052 else puts (" Upper Vcc tolerance 10%\n");
1053 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1054 else puts (" Lower Vcc tolerance 10%\n");
1055 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1056 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1057 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1058 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1064 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1065 print_ddr2_tcyc (data
[23]);
1068 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1069 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1075 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1076 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1079 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1080 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1086 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1087 print_ddr2_tcyc (data
[25]);
1090 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1091 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1097 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1098 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1101 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1102 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1108 printf ("Minimum row precharge %d.%02d ns\n",
1109 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1112 printf ("Minimum row precharge %d ns\n", data
[27]);
1118 printf ("Row active to row active min %d.%02d ns\n",
1119 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1122 printf ("Row active to row active min %d ns\n", data
[28]);
1128 printf ("RAS to CAS delay min %d.%02d ns\n",
1129 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1132 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1136 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1140 puts ("Density of each row ");
1141 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1145 puts ("Density of each row ");
1146 decode_bits (data
[31], decode_row_density_default
, 1);
1153 puts ("Command and Address setup ");
1154 if (data
[32] >= 0xA0) {
1155 printf ("1.%d%d ns\n",
1156 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1158 printf ("0.%d%d ns\n",
1159 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1163 printf ("Command and Address setup %c%d.%d ns\n",
1164 (data
[32] & 0x80) ? '-' : '+',
1165 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1171 puts ("Command and Address hold ");
1172 if (data
[33] >= 0xA0) {
1173 printf ("1.%d%d ns\n",
1174 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1176 printf ("0.%d%d ns\n",
1177 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1181 printf ("Command and Address hold %c%d.%d ns\n",
1182 (data
[33] & 0x80) ? '-' : '+',
1183 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1189 printf ("Data signal input setup 0.%d%d ns\n",
1190 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1193 printf ("Data signal input setup %c%d.%d ns\n",
1194 (data
[34] & 0x80) ? '-' : '+',
1195 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1201 printf ("Data signal input hold 0.%d%d ns\n",
1202 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1205 printf ("Data signal input hold %c%d.%d ns\n",
1206 (data
[35] & 0x80) ? '-' : '+',
1207 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1211 puts ("Manufacturer's JEDEC ID ");
1212 for (j
= 64; j
<= 71; j
++)
1213 printf ("%02X ", data
[j
]);
1215 printf ("Manufacturing Location %02X\n", data
[72]);
1216 puts ("Manufacturer's Part Number ");
1217 for (j
= 73; j
<= 90; j
++)
1218 printf ("%02X ", data
[j
]);
1220 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1221 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1222 puts ("Assembly Serial Number ");
1223 for (j
= 95; j
<= 98; j
++)
1224 printf ("%02X ", data
[j
]);
1228 printf ("Speed rating PC%d\n",
1229 data
[126] == 0x66 ? 66 : data
[126]);
1235 #if defined(CONFIG_I2C_MUX)
1236 int do_i2c_add_bus(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1241 /* show all busses */
1243 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1245 printf ("Busses reached over muxes:\n");
1246 while (device
!= NULL
) {
1247 printf ("Bus ID: %x\n", device
->busid
);
1248 printf (" reached over Mux(es):\n");
1250 while (mux
!= NULL
) {
1251 printf (" %s@%x ch: %x\n", mux
->name
, mux
->chip
, mux
->channel
);
1254 device
= device
->next
;
1257 I2C_MUX_DEVICE
*dev
;
1259 dev
= i2c_mux_ident_muxstring ((uchar
*)argv
[1]);
1264 #endif /* CONFIG_I2C_MUX */
1266 #if defined(CONFIG_I2C_MULTI_BUS)
1267 int do_i2c_bus_num(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1272 /* querying current setting */
1273 printf("Current bus is %d\n", i2c_get_bus_num());
1275 bus_idx
= simple_strtoul(argv
[1], NULL
, 10);
1276 printf("Setting bus to %d\n", bus_idx
);
1277 ret
= i2c_set_bus_num(bus_idx
);
1279 printf("Failure changing bus number (%d)\n", ret
);
1283 #endif /* CONFIG_I2C_MULTI_BUS */
1285 int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1290 /* querying current speed */
1291 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1293 speed
= simple_strtoul(argv
[1], NULL
, 10);
1294 printf("Setting bus speed to %d Hz\n", speed
);
1295 ret
= i2c_set_bus_speed(speed
);
1297 printf("Failure changing bus speed (%d)\n", ret
);
1302 int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1304 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1307 int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1309 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1312 int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1314 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1318 static cmd_tbl_t cmd_i2c_sub
[] = {
1319 #if defined(CONFIG_I2C_MUX)
1320 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_add_bus
, "", ""),
1321 #endif /* CONFIG_I2C_MUX */
1322 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1323 #if defined(CONFIG_I2C_MULTI_BUS)
1324 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1325 #endif /* CONFIG_I2C_MULTI_BUS */
1326 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1327 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1328 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1329 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1330 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1331 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1332 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1333 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1334 #if defined(CONFIG_CMD_SDRAM)
1335 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1337 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1340 int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
1344 /* Strip off leading 'i2c' command argument */
1348 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1351 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1358 /***************************************************/
1363 #if defined(CONFIG_I2C_MUX)
1364 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1365 #endif /* CONFIG_I2C_MUX */
1366 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1367 #if defined(CONFIG_I2C_MULTI_BUS)
1368 "i2c dev [dev] - show or set current I2C bus\n"
1369 #endif /* CONFIG_I2C_MULTI_BUS */
1370 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1371 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1372 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1373 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1374 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1375 "i2c probe - show devices on the I2C bus\n"
1376 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1377 "i2c reset - re-init the I2C Controller\n"
1378 #if defined(CONFIG_CMD_SDRAM)
1379 "i2c sdram chip - print SDRAM configuration information\n"
1381 "i2c speed [speed] - show or set I2C bus speed"
1384 #if defined(CONFIG_I2C_MUX)
1385 int i2c_mux_add_device(I2C_MUX_DEVICE
*dev
)
1387 I2C_MUX_DEVICE
*devtmp
= i2c_mux_devices
;
1389 if (i2c_mux_devices
== NULL
) {
1390 i2c_mux_devices
= dev
;
1393 while (devtmp
->next
!= NULL
)
1394 devtmp
= devtmp
->next
;
1400 I2C_MUX_DEVICE
*i2c_mux_search_device(int id
)
1402 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1404 while (device
!= NULL
) {
1405 if (device
->busid
== id
)
1407 device
= device
->next
;
1412 /* searches in the buf from *pos the next ':'.
1414 * 0 if found (with *pos = where)
1415 * < 0 if an error occured
1416 * > 0 if the end of buf is reached
1418 static int i2c_mux_search_next (int *pos
, uchar
*buf
, int len
)
1420 while ((buf
[*pos
] != ':') && (*pos
< len
)) {
1425 if (buf
[*pos
] != ':')
1430 static int i2c_mux_get_busid (void)
1432 int tmp
= i2c_mux_busid
;
1438 /* Analyses a Muxstring and sends immediately the
1439 Commands to the Muxes. Runs from Flash.
1441 int i2c_mux_ident_muxstring_f (uchar
*buf
)
1446 int len
= strlen((char *)buf
);
1454 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1457 /* search address */
1460 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1464 chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1466 /* search channel */
1469 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1473 if (buf
[pos
] != 0) {
1477 channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1480 if (i2c_write(chip
, 0, 0, &channel
, 1) != 0) {
1481 printf ("Error setting Mux: chip:%x channel: \
1482 %x\n", chip
, channel
);
1493 /* Analyses a Muxstring and if this String is correct
1494 * adds a new I2C Bus.
1496 I2C_MUX_DEVICE
*i2c_mux_ident_muxstring (uchar
*buf
)
1498 I2C_MUX_DEVICE
*device
;
1503 int len
= strlen((char *)buf
);
1506 device
= (I2C_MUX_DEVICE
*)malloc (sizeof(I2C_MUX_DEVICE
));
1508 device
->busid
= i2c_mux_get_busid ();
1509 device
->next
= NULL
;
1511 mux
= (I2C_MUX
*)malloc (sizeof(I2C_MUX
));
1513 /* search name of mux */
1515 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1517 printf ("%s no name.\n", __FUNCTION__
);
1518 mux
->name
= (char *)malloc (pos
- oldpos
+ 1);
1519 memcpy (mux
->name
, &buf
[oldpos
], pos
- oldpos
);
1520 mux
->name
[pos
- oldpos
] = 0;
1521 /* search address */
1524 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1526 printf ("%s no mux address.\n", __FUNCTION__
);
1528 mux
->chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1530 /* search channel */
1533 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1535 printf ("%s no mux channel.\n", __FUNCTION__
);
1537 if (buf
[pos
] != 0) {
1541 mux
->channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1544 if (device
->mux
== NULL
)
1547 I2C_MUX
*muxtmp
= device
->mux
;
1548 while (muxtmp
->next
!= NULL
) {
1549 muxtmp
= muxtmp
->next
;
1558 i2c_mux_add_device (device
);
1565 int i2x_mux_select_mux(int bus
)
1567 I2C_MUX_DEVICE
*dev
;
1570 if ((gd
->flags
& GD_FLG_RELOC
) != GD_FLG_RELOC
) {
1571 /* select Default Mux Bus */
1572 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1573 i2c_mux_ident_muxstring_f ((uchar
*)CONFIG_SYS_I2C_IVM_BUS
);
1577 buf
= (unsigned char *) getenv("EEprom_ivm");
1579 i2c_mux_ident_muxstring_f (buf
);
1584 dev
= i2c_mux_search_device(bus
);
1589 while (mux
!= NULL
) {
1590 if (i2c_write(mux
->chip
, 0, 0, &mux
->channel
, 1) != 0) {
1591 printf ("Error setting Mux: chip:%x channel: \
1592 %x\n", mux
->chip
, mux
->channel
);
1599 #endif /* CONFIG_I2C_MUX */