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 /* implement possible board specific board init */
136 void __def_i2c_init_board(void)
140 void i2c_init_board(void)
141 __attribute__((weak
, alias("__def_i2c_init_board")));
143 /* TODO: Implement architecture-specific get/set functions */
144 unsigned int __def_i2c_get_bus_speed(void)
146 return CONFIG_SYS_I2C_SPEED
;
148 unsigned int i2c_get_bus_speed(void)
149 __attribute__((weak
, alias("__def_i2c_get_bus_speed")));
151 int __def_i2c_set_bus_speed(unsigned int speed
)
153 if (speed
!= CONFIG_SYS_I2C_SPEED
)
158 int i2c_set_bus_speed(unsigned int)
159 __attribute__((weak
, alias("__def_i2c_set_bus_speed")));
162 * get_alen: small parser helper function to get address length
163 * returns the address length
165 static uint
get_alen(char *arg
)
171 for (j
= 0; j
< 8; j
++) {
173 alen
= arg
[j
+1] - '0';
175 } else if (arg
[j
] == '\0')
183 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
186 static int do_i2c_read ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
189 uint devaddr
, alen
, length
;
193 return cmd_usage(cmdtp
);
198 chip
= simple_strtoul(argv
[1], NULL
, 16);
201 * I2C data address within the chip. This can be 1 or
202 * 2 bytes long. Some day it might be 3 bytes long :-).
204 devaddr
= simple_strtoul(argv
[2], NULL
, 16);
205 alen
= get_alen(argv
[2]);
207 return cmd_usage(cmdtp
);
210 * Length is the number of objects, not number of bytes.
212 length
= simple_strtoul(argv
[3], NULL
, 16);
215 * memaddr is the address where to store things in memory
217 memaddr
= (u_char
*)simple_strtoul(argv
[4], NULL
, 16);
219 if (i2c_read(chip
, devaddr
, alen
, memaddr
, length
) != 0) {
220 puts ("Error reading the chip.\n");
228 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
230 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
233 uint addr
, alen
, length
;
234 int j
, nbytes
, linebytes
;
236 /* We use the last specified parameters, unless new ones are
239 chip
= i2c_dp_last_chip
;
240 addr
= i2c_dp_last_addr
;
241 alen
= i2c_dp_last_alen
;
242 length
= i2c_dp_last_length
;
245 return cmd_usage(cmdtp
);
247 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
249 * New command specified.
255 chip
= simple_strtoul(argv
[1], NULL
, 16);
258 * I2C data address within the chip. This can be 1 or
259 * 2 bytes long. Some day it might be 3 bytes long :-).
261 addr
= simple_strtoul(argv
[2], NULL
, 16);
262 alen
= get_alen(argv
[2]);
264 return cmd_usage(cmdtp
);
267 * If another parameter, it is the length to display.
268 * Length is the number of objects, not number of bytes.
271 length
= simple_strtoul(argv
[3], NULL
, 16);
277 * We buffer all read data, so we can make sure data is read only
282 unsigned char linebuf
[DISP_LINE_LEN
];
285 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
287 if (i2c_read(chip
, addr
, alen
, linebuf
, linebytes
) != 0)
288 puts ("Error reading the chip.\n");
290 printf("%04x:", addr
);
292 for (j
=0; j
<linebytes
; j
++) {
293 printf(" %02x", *cp
++);
298 for (j
=0; j
<linebytes
; j
++) {
299 if ((*cp
< 0x20) || (*cp
> 0x7e))
308 } while (nbytes
> 0);
310 i2c_dp_last_chip
= chip
;
311 i2c_dp_last_addr
= addr
;
312 i2c_dp_last_alen
= alen
;
313 i2c_dp_last_length
= length
;
319 /* Write (fill) memory
322 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
324 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
332 if ((argc
< 4) || (argc
> 5))
333 return cmd_usage(cmdtp
);
336 * Chip is always specified.
338 chip
= simple_strtoul(argv
[1], NULL
, 16);
341 * Address is always specified.
343 addr
= simple_strtoul(argv
[2], NULL
, 16);
344 alen
= get_alen(argv
[2]);
346 return cmd_usage(cmdtp
);
349 * Value to write is always specified.
351 byte
= simple_strtoul(argv
[3], NULL
, 16);
357 count
= simple_strtoul(argv
[4], NULL
, 16);
361 while (count
-- > 0) {
362 if (i2c_write(chip
, addr
++, alen
, &byte
, 1) != 0)
363 puts ("Error writing the chip.\n");
365 * Wait for the write to complete. The write can take
366 * up to 10mSec (we allow a little more time).
369 * No write delay with FRAM devices.
371 #if !defined(CONFIG_SYS_I2C_FRAM)
379 /* Calculate a CRC on memory
382 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
384 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
395 return cmd_usage(cmdtp
);
398 * Chip is always specified.
400 chip
= simple_strtoul(argv
[1], NULL
, 16);
403 * Address is always specified.
405 addr
= simple_strtoul(argv
[2], NULL
, 16);
406 alen
= get_alen(argv
[2]);
408 return cmd_usage(cmdtp
);
411 * Count is always specified
413 count
= simple_strtoul(argv
[3], NULL
, 16);
415 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
417 * CRC a byte at a time. This is going to be slooow, but hey, the
418 * memories are small and slow too so hopefully nobody notices.
422 while (count
-- > 0) {
423 if (i2c_read(chip
, addr
, alen
, &byte
, 1) != 0)
425 crc
= crc32 (crc
, &byte
, 1);
429 puts ("Error reading the chip,\n");
431 printf ("%08lx\n", crc
);
439 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
440 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
444 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
454 return cmd_usage(cmdtp
);
456 #ifdef CONFIG_BOOT_RETRY_TIME
457 reset_cmd_timeout(); /* got a good command to get here */
460 * We use the last specified parameters, unless new ones are
463 chip
= i2c_mm_last_chip
;
464 addr
= i2c_mm_last_addr
;
465 alen
= i2c_mm_last_alen
;
467 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
469 * New command specified. Check for a size specification.
470 * Defaults to byte if no or incorrect specification.
472 size
= cmd_get_data_size(argv
[0], 1);
475 * Chip is always specified.
477 chip
= simple_strtoul(argv
[1], NULL
, 16);
480 * Address is always specified.
482 addr
= simple_strtoul(argv
[2], NULL
, 16);
483 alen
= get_alen(argv
[2]);
485 return cmd_usage(cmdtp
);
489 * Print the address, followed by value. Then accept input for
490 * the next value. A non-converted value exits.
493 printf("%08lx:", addr
);
494 if (i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
495 puts ("\nError reading the chip,\n");
497 data
= cpu_to_be32(data
);
499 printf(" %02lx", (data
>> 24) & 0x000000FF);
501 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
503 printf(" %08lx", data
);
506 nbytes
= readline (" ? ");
509 * <CR> pressed as only input, don't modify current
510 * location and move to next.
515 #ifdef CONFIG_BOOT_RETRY_TIME
516 reset_cmd_timeout(); /* good enough to not time out */
519 #ifdef CONFIG_BOOT_RETRY_TIME
520 else if (nbytes
== -2)
521 break; /* timed out, exit the command */
526 data
= simple_strtoul(console_buffer
, &endp
, 16);
531 data
= be32_to_cpu(data
);
532 nbytes
= endp
- console_buffer
;
534 #ifdef CONFIG_BOOT_RETRY_TIME
536 * good enough to not time out
540 if (i2c_write(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
541 puts ("Error writing the chip.\n");
542 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
543 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
551 i2c_mm_last_chip
= chip
;
552 i2c_mm_last_addr
= addr
;
553 i2c_mm_last_alen
= alen
;
560 * i2c probe {addr}{.0, .1, .2}
562 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
565 #if defined(CONFIG_SYS_I2C_NOPROBES)
567 uchar bus
= GET_BUS_NUM
;
568 #endif /* NOPROBES */
570 puts ("Valid chip addresses:");
571 for (j
= 0; j
< 128; j
++) {
572 #if defined(CONFIG_SYS_I2C_NOPROBES)
574 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
575 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
583 if (i2c_probe(j
) == 0)
588 #if defined(CONFIG_SYS_I2C_NOPROBES)
589 puts ("Excluded chip addresses:");
590 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
591 if (COMPARE_BUS(bus
,k
))
592 printf(" %02X", NO_PROBE_ADDR(k
));
602 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
603 * {length} - Number of bytes to read
604 * {delay} - A DECIMAL number and defaults to 1000 uSec
606 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
616 return cmd_usage(cmdtp
);
619 * Chip is always specified.
621 chip
= simple_strtoul(argv
[1], NULL
, 16);
624 * Address is always specified.
626 addr
= simple_strtoul(argv
[2], NULL
, 16);
627 alen
= get_alen(argv
[2]);
629 return cmd_usage(cmdtp
);
632 * Length is the number of objects, not number of bytes.
635 length
= simple_strtoul(argv
[3], NULL
, 16);
636 if (length
> sizeof(bytes
))
637 length
= sizeof(bytes
);
640 * The delay time (uSec) is optional.
644 delay
= simple_strtoul(argv
[4], NULL
, 10);
649 if (i2c_read(chip
, addr
, alen
, bytes
, length
) != 0)
650 puts ("Error reading the chip.\n");
659 * The SDRAM command is separately configured because many
660 * (most?) embedded boards don't use SDRAM DIMMs.
662 #if defined(CONFIG_CMD_SDRAM)
663 static void print_ddr2_tcyc (u_char
const b
)
665 printf ("%d.", (b
>> 4) & 0x0F);
677 printf ("%d ns\n", b
& 0x0F);
697 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
701 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
712 * i2c sdram {i2c_chip}
714 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
716 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
723 static const char *decode_CAS_DDR2
[] = {
724 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
727 static const char *decode_CAS_default
[] = {
728 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
731 static const char *decode_CS_WE_default
[] = {
732 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
735 static const char *decode_byte21_default
[] = {
737 " Redundant row address\n",
738 " Differential clock input\n",
739 " Registerd DQMB inputs\n",
740 " Buffered DQMB inputs\n",
742 " Registered address/control lines\n",
743 " Buffered address/control lines\n"
746 static const char *decode_byte22_DDR2
[] = {
752 " Supports partial array self refresh\n",
753 " Supports 50 ohm ODT\n",
754 " Supports weak driver\n"
757 static const char *decode_row_density_DDR2
[] = {
758 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
759 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
762 static const char *decode_row_density_default
[] = {
763 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
764 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
768 return cmd_usage(cmdtp
);
771 * Chip is always specified.
773 chip
= simple_strtoul (argv
[1], NULL
, 16);
775 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
776 puts ("No SDRAM Serial Presence Detect found.\n");
781 for (j
= 0; j
< 63; j
++) {
784 if (cksum
!= data
[63]) {
785 printf ("WARNING: Configuration data checksum failure:\n"
786 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
788 printf ("SPD data revision %d.%d\n",
789 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
790 printf ("Bytes used 0x%02X\n", data
[0]);
791 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
793 puts ("Memory type ");
813 puts ("Row address bits ");
814 if ((data
[3] & 0x00F0) == 0)
815 printf ("%d\n", data
[3] & 0x0F);
817 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
819 puts ("Column address bits ");
820 if ((data
[4] & 0x00F0) == 0)
821 printf ("%d\n", data
[4] & 0x0F);
823 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
827 printf ("Number of ranks %d\n",
828 (data
[5] & 0x07) + 1);
831 printf ("Module rows %d\n", data
[5]);
837 printf ("Module data width %d bits\n", data
[6]);
840 printf ("Module data width %d bits\n",
841 (data
[7] << 8) | data
[6]);
845 puts ("Interface signal levels ");
847 case 0: puts ("TTL 5.0 V\n"); break;
848 case 1: puts ("LVTTL\n"); break;
849 case 2: puts ("HSTL 1.5 V\n"); break;
850 case 3: puts ("SSTL 3.3 V\n"); break;
851 case 4: puts ("SSTL 2.5 V\n"); break;
852 case 5: puts ("SSTL 1.8 V\n"); break;
853 default: puts ("unknown\n"); break;
858 printf ("SDRAM cycle time ");
859 print_ddr2_tcyc (data
[9]);
862 printf ("SDRAM cycle time %d.%d ns\n",
863 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
869 printf ("SDRAM access time 0.%d%d ns\n",
870 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
873 printf ("SDRAM access time %d.%d ns\n",
874 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
878 puts ("EDC configuration ");
880 case 0: puts ("None\n"); break;
881 case 1: puts ("Parity\n"); break;
882 case 2: puts ("ECC\n"); break;
883 default: puts ("unknown\n"); break;
886 if ((data
[12] & 0x80) == 0)
887 puts ("No self refresh, rate ");
889 puts ("Self refresh, rate ");
891 switch(data
[12] & 0x7F) {
892 case 0: puts ("15.625 us\n"); break;
893 case 1: puts ("3.9 us\n"); break;
894 case 2: puts ("7.8 us\n"); break;
895 case 3: puts ("31.3 us\n"); break;
896 case 4: puts ("62.5 us\n"); break;
897 case 5: puts ("125 us\n"); break;
898 default: puts ("unknown\n"); break;
903 printf ("SDRAM width (primary) %d\n", data
[13]);
906 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
907 if ((data
[13] & 0x80) != 0) {
908 printf (" (second bank) %d\n",
909 2 * (data
[13] & 0x7F));
917 printf ("EDC width %d\n", data
[14]);
921 printf ("EDC width %d\n",
924 if ((data
[14] & 0x80) != 0) {
925 printf (" (second bank) %d\n",
926 2 * (data
[14] & 0x7F));
933 printf ("Min clock delay, back-to-back random column addresses "
937 puts ("Burst length(s) ");
938 if (data
[16] & 0x80) puts (" Page");
939 if (data
[16] & 0x08) puts (" 8");
940 if (data
[16] & 0x04) puts (" 4");
941 if (data
[16] & 0x02) puts (" 2");
942 if (data
[16] & 0x01) puts (" 1");
944 printf ("Number of banks %d\n", data
[17]);
948 puts ("CAS latency(s) ");
949 decode_bits (data
[18], decode_CAS_DDR2
, 0);
953 puts ("CAS latency(s) ");
954 decode_bits (data
[18], decode_CAS_default
, 0);
960 puts ("CS latency(s) ");
961 decode_bits (data
[19], decode_CS_WE_default
, 0);
966 puts ("WE latency(s) ");
967 decode_bits (data
[20], decode_CS_WE_default
, 0);
973 puts ("Module attributes:\n");
975 puts (" TBD (bit 7)\n");
977 puts (" Analysis probe installed\n");
979 puts (" TBD (bit 5)\n");
981 puts (" FET switch external enable\n");
982 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
983 if (data
[20] & 0x11) {
984 printf (" %d active registers on DIMM\n",
985 (data
[21] & 0x03) + 1);
989 puts ("Module attributes:\n");
993 decode_bits (data
[21], decode_byte21_default
, 0);
999 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1002 puts ("Device attributes:\n");
1003 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1004 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1005 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1006 else puts (" Upper Vcc tolerance 10%\n");
1007 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1008 else puts (" Lower Vcc tolerance 10%\n");
1009 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1010 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1011 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1012 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1018 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1019 print_ddr2_tcyc (data
[23]);
1022 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1023 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1029 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1030 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1033 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1034 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1040 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1041 print_ddr2_tcyc (data
[25]);
1044 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1045 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1051 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1052 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1055 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1056 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1062 printf ("Minimum row precharge %d.%02d ns\n",
1063 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1066 printf ("Minimum row precharge %d ns\n", data
[27]);
1072 printf ("Row active to row active min %d.%02d ns\n",
1073 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1076 printf ("Row active to row active min %d ns\n", data
[28]);
1082 printf ("RAS to CAS delay min %d.%02d ns\n",
1083 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1086 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1090 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1094 puts ("Density of each row ");
1095 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1099 puts ("Density of each row ");
1100 decode_bits (data
[31], decode_row_density_default
, 1);
1107 puts ("Command and Address setup ");
1108 if (data
[32] >= 0xA0) {
1109 printf ("1.%d%d ns\n",
1110 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1112 printf ("0.%d%d ns\n",
1113 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1117 printf ("Command and Address setup %c%d.%d ns\n",
1118 (data
[32] & 0x80) ? '-' : '+',
1119 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1125 puts ("Command and Address hold ");
1126 if (data
[33] >= 0xA0) {
1127 printf ("1.%d%d ns\n",
1128 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1130 printf ("0.%d%d ns\n",
1131 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1135 printf ("Command and Address hold %c%d.%d ns\n",
1136 (data
[33] & 0x80) ? '-' : '+',
1137 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1143 printf ("Data signal input setup 0.%d%d ns\n",
1144 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1147 printf ("Data signal input setup %c%d.%d ns\n",
1148 (data
[34] & 0x80) ? '-' : '+',
1149 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1155 printf ("Data signal input hold 0.%d%d ns\n",
1156 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1159 printf ("Data signal input hold %c%d.%d ns\n",
1160 (data
[35] & 0x80) ? '-' : '+',
1161 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1165 puts ("Manufacturer's JEDEC ID ");
1166 for (j
= 64; j
<= 71; j
++)
1167 printf ("%02X ", data
[j
]);
1169 printf ("Manufacturing Location %02X\n", data
[72]);
1170 puts ("Manufacturer's Part Number ");
1171 for (j
= 73; j
<= 90; j
++)
1172 printf ("%02X ", data
[j
]);
1174 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1175 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1176 puts ("Assembly Serial Number ");
1177 for (j
= 95; j
<= 98; j
++)
1178 printf ("%02X ", data
[j
]);
1182 printf ("Speed rating PC%d\n",
1183 data
[126] == 0x66 ? 66 : data
[126]);
1189 #if defined(CONFIG_I2C_MUX)
1190 static int do_i2c_add_bus(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1195 /* show all busses */
1197 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1199 printf ("Busses reached over muxes:\n");
1200 while (device
!= NULL
) {
1201 printf ("Bus ID: %x\n", device
->busid
);
1202 printf (" reached over Mux(es):\n");
1204 while (mux
!= NULL
) {
1205 printf (" %s@%x ch: %x\n", mux
->name
, mux
->chip
, mux
->channel
);
1208 device
= device
->next
;
1211 (void)i2c_mux_ident_muxstring ((uchar
*)argv
[1]);
1216 #endif /* CONFIG_I2C_MUX */
1218 #if defined(CONFIG_I2C_MULTI_BUS)
1219 static int do_i2c_bus_num(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1224 /* querying current setting */
1225 printf("Current bus is %d\n", i2c_get_bus_num());
1227 bus_idx
= simple_strtoul(argv
[1], NULL
, 10);
1228 printf("Setting bus to %d\n", bus_idx
);
1229 ret
= i2c_set_bus_num(bus_idx
);
1231 printf("Failure changing bus number (%d)\n", ret
);
1235 #endif /* CONFIG_I2C_MULTI_BUS */
1237 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1242 /* querying current speed */
1243 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1245 speed
= simple_strtoul(argv
[1], NULL
, 10);
1246 printf("Setting bus speed to %d Hz\n", speed
);
1247 ret
= i2c_set_bus_speed(speed
);
1249 printf("Failure changing bus speed (%d)\n", ret
);
1254 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1256 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1259 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1261 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1264 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1266 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1270 static cmd_tbl_t cmd_i2c_sub
[] = {
1271 #if defined(CONFIG_I2C_MUX)
1272 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_add_bus
, "", ""),
1273 #endif /* CONFIG_I2C_MUX */
1274 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1275 #if defined(CONFIG_I2C_MULTI_BUS)
1276 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1277 #endif /* CONFIG_I2C_MULTI_BUS */
1278 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1279 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1280 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1281 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1282 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1283 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1284 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1285 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1286 #if defined(CONFIG_CMD_SDRAM)
1287 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1289 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1292 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1293 void i2c_reloc(void) {
1294 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1298 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1303 return cmd_usage(cmdtp
);
1305 /* Strip off leading 'i2c' command argument */
1309 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1312 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1314 return cmd_usage(cmdtp
);
1317 /***************************************************/
1322 #if defined(CONFIG_I2C_MUX)
1323 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1324 #endif /* CONFIG_I2C_MUX */
1325 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1326 #if defined(CONFIG_I2C_MULTI_BUS)
1327 "i2c dev [dev] - show or set current I2C bus\n"
1328 #endif /* CONFIG_I2C_MULTI_BUS */
1329 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1330 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1331 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1332 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1333 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1334 "i2c probe - show devices on the I2C bus\n"
1335 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1336 "i2c reset - re-init the I2C Controller\n"
1337 #if defined(CONFIG_CMD_SDRAM)
1338 "i2c sdram chip - print SDRAM configuration information\n"
1340 "i2c speed [speed] - show or set I2C bus speed"
1343 #if defined(CONFIG_I2C_MUX)
1344 static int i2c_mux_add_device(I2C_MUX_DEVICE
*dev
)
1346 I2C_MUX_DEVICE
*devtmp
= i2c_mux_devices
;
1348 if (i2c_mux_devices
== NULL
) {
1349 i2c_mux_devices
= dev
;
1352 while (devtmp
->next
!= NULL
)
1353 devtmp
= devtmp
->next
;
1359 I2C_MUX_DEVICE
*i2c_mux_search_device(int id
)
1361 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1363 while (device
!= NULL
) {
1364 if (device
->busid
== id
)
1366 device
= device
->next
;
1371 /* searches in the buf from *pos the next ':'.
1373 * 0 if found (with *pos = where)
1374 * < 0 if an error occured
1375 * > 0 if the end of buf is reached
1377 static int i2c_mux_search_next (int *pos
, uchar
*buf
, int len
)
1379 while ((buf
[*pos
] != ':') && (*pos
< len
)) {
1384 if (buf
[*pos
] != ':')
1389 static int i2c_mux_get_busid (void)
1391 int tmp
= i2c_mux_busid
;
1397 /* Analyses a Muxstring and immediately sends the
1398 commands to the muxes. Runs from flash.
1400 int i2c_mux_ident_muxstring_f (uchar
*buf
)
1405 int len
= strlen((char *)buf
);
1413 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1416 /* search address */
1419 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1423 chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1425 /* search channel */
1428 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1432 if (buf
[pos
] != 0) {
1436 channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1439 if (i2c_write(chip
, 0, 0, &channel
, 1) != 0) {
1440 printf ("Error setting Mux: chip:%x channel: \
1441 %x\n", chip
, channel
);
1452 /* Analyses a Muxstring and if this String is correct
1453 * adds a new I2C Bus.
1455 I2C_MUX_DEVICE
*i2c_mux_ident_muxstring (uchar
*buf
)
1457 I2C_MUX_DEVICE
*device
;
1462 int len
= strlen((char *)buf
);
1465 device
= (I2C_MUX_DEVICE
*)malloc (sizeof(I2C_MUX_DEVICE
));
1467 device
->busid
= i2c_mux_get_busid ();
1468 device
->next
= NULL
;
1470 mux
= (I2C_MUX
*)malloc (sizeof(I2C_MUX
));
1472 /* search name of mux */
1474 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1476 printf ("%s no name.\n", __FUNCTION__
);
1477 mux
->name
= (char *)malloc (pos
- oldpos
+ 1);
1478 memcpy (mux
->name
, &buf
[oldpos
], pos
- oldpos
);
1479 mux
->name
[pos
- oldpos
] = 0;
1480 /* search address */
1483 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1485 printf ("%s no mux address.\n", __FUNCTION__
);
1487 mux
->chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1489 /* search channel */
1492 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1494 printf ("%s no mux channel.\n", __FUNCTION__
);
1496 if (buf
[pos
] != 0) {
1500 mux
->channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1503 if (device
->mux
== NULL
)
1506 I2C_MUX
*muxtmp
= device
->mux
;
1507 while (muxtmp
->next
!= NULL
) {
1508 muxtmp
= muxtmp
->next
;
1517 i2c_mux_add_device (device
);
1524 int i2x_mux_select_mux(int bus
)
1526 I2C_MUX_DEVICE
*dev
;
1529 if ((gd
->flags
& GD_FLG_RELOC
) != GD_FLG_RELOC
) {
1530 /* select Default Mux Bus */
1531 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1532 i2c_mux_ident_muxstring_f ((uchar
*)CONFIG_SYS_I2C_IVM_BUS
);
1536 buf
= (unsigned char *) getenv("EEprom_ivm");
1538 i2c_mux_ident_muxstring_f (buf
);
1543 dev
= i2c_mux_search_device(bus
);
1548 while (mux
!= NULL
) {
1549 /* do deblocking on each level of mux, before mux config */
1551 if (i2c_write(mux
->chip
, 0, 0, &mux
->channel
, 1) != 0) {
1552 printf ("Error setting Mux: chip:%x channel: \
1553 %x\n", mux
->chip
, mux
->channel
);
1558 /* do deblocking on each level of mux and after mux config */
1562 #endif /* CONFIG_I2C_MUX */