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_RET_USAGE
;
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_RET_USAGE
;
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");
226 static int do_i2c_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
229 uint devaddr
, alen
, length
;
233 return cmd_usage(cmdtp
);
236 * memaddr is the address where to store things in memory
238 memaddr
= (u_char
*)simple_strtoul(argv
[1], NULL
, 16);
243 chip
= simple_strtoul(argv
[2], NULL
, 16);
246 * I2C data address within the chip. This can be 1 or
247 * 2 bytes long. Some day it might be 3 bytes long :-).
249 devaddr
= simple_strtoul(argv
[3], NULL
, 16);
250 alen
= get_alen(argv
[3]);
252 return cmd_usage(cmdtp
);
255 * Length is the number of objects, not number of bytes.
257 length
= simple_strtoul(argv
[4], NULL
, 16);
259 while (length
-- > 0) {
260 if (i2c_write(chip
, devaddr
++, alen
, memaddr
++, 1) != 0) {
261 puts("Error writing to the chip.\n");
265 * No write delay with FRAM devices.
267 #if !defined(CONFIG_SYS_I2C_FRAM)
276 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
278 static int do_i2c_md ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
281 uint addr
, alen
, length
;
282 int j
, nbytes
, linebytes
;
284 /* We use the last specified parameters, unless new ones are
287 chip
= i2c_dp_last_chip
;
288 addr
= i2c_dp_last_addr
;
289 alen
= i2c_dp_last_alen
;
290 length
= i2c_dp_last_length
;
293 return CMD_RET_USAGE
;
295 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
297 * New command specified.
303 chip
= simple_strtoul(argv
[1], NULL
, 16);
306 * I2C data address within the chip. This can be 1 or
307 * 2 bytes long. Some day it might be 3 bytes long :-).
309 addr
= simple_strtoul(argv
[2], NULL
, 16);
310 alen
= get_alen(argv
[2]);
312 return CMD_RET_USAGE
;
315 * If another parameter, it is the length to display.
316 * Length is the number of objects, not number of bytes.
319 length
= simple_strtoul(argv
[3], NULL
, 16);
325 * We buffer all read data, so we can make sure data is read only
330 unsigned char linebuf
[DISP_LINE_LEN
];
333 linebytes
= (nbytes
> DISP_LINE_LEN
) ? DISP_LINE_LEN
: nbytes
;
335 if (i2c_read(chip
, addr
, alen
, linebuf
, linebytes
) != 0)
336 puts ("Error reading the chip.\n");
338 printf("%04x:", addr
);
340 for (j
=0; j
<linebytes
; j
++) {
341 printf(" %02x", *cp
++);
346 for (j
=0; j
<linebytes
; j
++) {
347 if ((*cp
< 0x20) || (*cp
> 0x7e))
356 } while (nbytes
> 0);
358 i2c_dp_last_chip
= chip
;
359 i2c_dp_last_addr
= addr
;
360 i2c_dp_last_alen
= alen
;
361 i2c_dp_last_length
= length
;
367 /* Write (fill) memory
370 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
372 static int do_i2c_mw ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
380 if ((argc
< 4) || (argc
> 5))
381 return CMD_RET_USAGE
;
384 * Chip is always specified.
386 chip
= simple_strtoul(argv
[1], NULL
, 16);
389 * Address is always specified.
391 addr
= simple_strtoul(argv
[2], NULL
, 16);
392 alen
= get_alen(argv
[2]);
394 return CMD_RET_USAGE
;
397 * Value to write is always specified.
399 byte
= simple_strtoul(argv
[3], NULL
, 16);
405 count
= simple_strtoul(argv
[4], NULL
, 16);
409 while (count
-- > 0) {
410 if (i2c_write(chip
, addr
++, alen
, &byte
, 1) != 0)
411 puts ("Error writing the chip.\n");
413 * Wait for the write to complete. The write can take
414 * up to 10mSec (we allow a little more time).
417 * No write delay with FRAM devices.
419 #if !defined(CONFIG_SYS_I2C_FRAM)
427 /* Calculate a CRC on memory
430 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
432 static int do_i2c_crc (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
443 return CMD_RET_USAGE
;
446 * Chip is always specified.
448 chip
= simple_strtoul(argv
[1], NULL
, 16);
451 * Address is always specified.
453 addr
= simple_strtoul(argv
[2], NULL
, 16);
454 alen
= get_alen(argv
[2]);
456 return CMD_RET_USAGE
;
459 * Count is always specified
461 count
= simple_strtoul(argv
[3], NULL
, 16);
463 printf ("CRC32 for %08lx ... %08lx ==> ", addr
, addr
+ count
- 1);
465 * CRC a byte at a time. This is going to be slooow, but hey, the
466 * memories are small and slow too so hopefully nobody notices.
470 while (count
-- > 0) {
471 if (i2c_read(chip
, addr
, alen
, &byte
, 1) != 0)
473 crc
= crc32 (crc
, &byte
, 1);
477 puts ("Error reading the chip,\n");
479 printf ("%08lx\n", crc
);
487 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
488 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
492 mod_i2c_mem(cmd_tbl_t
*cmdtp
, int incrflag
, int flag
, int argc
, char * const argv
[])
502 return CMD_RET_USAGE
;
504 #ifdef CONFIG_BOOT_RETRY_TIME
505 reset_cmd_timeout(); /* got a good command to get here */
508 * We use the last specified parameters, unless new ones are
511 chip
= i2c_mm_last_chip
;
512 addr
= i2c_mm_last_addr
;
513 alen
= i2c_mm_last_alen
;
515 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
517 * New command specified. Check for a size specification.
518 * Defaults to byte if no or incorrect specification.
520 size
= cmd_get_data_size(argv
[0], 1);
523 * Chip is always specified.
525 chip
= simple_strtoul(argv
[1], NULL
, 16);
528 * Address is always specified.
530 addr
= simple_strtoul(argv
[2], NULL
, 16);
531 alen
= get_alen(argv
[2]);
533 return CMD_RET_USAGE
;
537 * Print the address, followed by value. Then accept input for
538 * the next value. A non-converted value exits.
541 printf("%08lx:", addr
);
542 if (i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
543 puts ("\nError reading the chip,\n");
545 data
= cpu_to_be32(data
);
547 printf(" %02lx", (data
>> 24) & 0x000000FF);
549 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
551 printf(" %08lx", data
);
554 nbytes
= readline (" ? ");
557 * <CR> pressed as only input, don't modify current
558 * location and move to next.
563 #ifdef CONFIG_BOOT_RETRY_TIME
564 reset_cmd_timeout(); /* good enough to not time out */
567 #ifdef CONFIG_BOOT_RETRY_TIME
568 else if (nbytes
== -2)
569 break; /* timed out, exit the command */
574 data
= simple_strtoul(console_buffer
, &endp
, 16);
579 data
= be32_to_cpu(data
);
580 nbytes
= endp
- console_buffer
;
582 #ifdef CONFIG_BOOT_RETRY_TIME
584 * good enough to not time out
588 if (i2c_write(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
589 puts ("Error writing the chip.\n");
590 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
591 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
599 i2c_mm_last_chip
= chip
;
600 i2c_mm_last_addr
= addr
;
601 i2c_mm_last_alen
= alen
;
610 * Returns zero (success) if one or more I2C devices was found
612 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
617 #if defined(CONFIG_SYS_I2C_NOPROBES)
619 uchar bus
= GET_BUS_NUM
;
620 #endif /* NOPROBES */
623 addr
= simple_strtol(argv
[1], 0, 16);
625 puts ("Valid chip addresses:");
626 for (j
= 0; j
< 128; j
++) {
627 if ((0 <= addr
) && (j
!= addr
))
630 #if defined(CONFIG_SYS_I2C_NOPROBES)
632 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
633 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
641 if (i2c_probe(j
) == 0) {
648 #if defined(CONFIG_SYS_I2C_NOPROBES)
649 puts ("Excluded chip addresses:");
650 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
651 if (COMPARE_BUS(bus
,k
))
652 printf(" %02X", NO_PROBE_ADDR(k
));
662 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
663 * {length} - Number of bytes to read
664 * {delay} - A DECIMAL number and defaults to 1000 uSec
666 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
676 return CMD_RET_USAGE
;
679 * Chip is always specified.
681 chip
= simple_strtoul(argv
[1], NULL
, 16);
684 * Address is always specified.
686 addr
= simple_strtoul(argv
[2], NULL
, 16);
687 alen
= get_alen(argv
[2]);
689 return CMD_RET_USAGE
;
692 * Length is the number of objects, not number of bytes.
695 length
= simple_strtoul(argv
[3], NULL
, 16);
696 if (length
> sizeof(bytes
))
697 length
= sizeof(bytes
);
700 * The delay time (uSec) is optional.
704 delay
= simple_strtoul(argv
[4], NULL
, 10);
709 if (i2c_read(chip
, addr
, alen
, bytes
, length
) != 0)
710 puts ("Error reading the chip.\n");
719 * The SDRAM command is separately configured because many
720 * (most?) embedded boards don't use SDRAM DIMMs.
722 #if defined(CONFIG_CMD_SDRAM)
723 static void print_ddr2_tcyc (u_char
const b
)
725 printf ("%d.", (b
>> 4) & 0x0F);
737 printf ("%d ns\n", b
& 0x0F);
757 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
761 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
772 * i2c sdram {i2c_chip}
774 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
776 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
783 static const char *decode_CAS_DDR2
[] = {
784 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
787 static const char *decode_CAS_default
[] = {
788 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
791 static const char *decode_CS_WE_default
[] = {
792 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
795 static const char *decode_byte21_default
[] = {
797 " Redundant row address\n",
798 " Differential clock input\n",
799 " Registerd DQMB inputs\n",
800 " Buffered DQMB inputs\n",
802 " Registered address/control lines\n",
803 " Buffered address/control lines\n"
806 static const char *decode_byte22_DDR2
[] = {
812 " Supports partial array self refresh\n",
813 " Supports 50 ohm ODT\n",
814 " Supports weak driver\n"
817 static const char *decode_row_density_DDR2
[] = {
818 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
819 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
822 static const char *decode_row_density_default
[] = {
823 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
824 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
828 return CMD_RET_USAGE
;
831 * Chip is always specified.
833 chip
= simple_strtoul (argv
[1], NULL
, 16);
835 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
836 puts ("No SDRAM Serial Presence Detect found.\n");
841 for (j
= 0; j
< 63; j
++) {
844 if (cksum
!= data
[63]) {
845 printf ("WARNING: Configuration data checksum failure:\n"
846 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
848 printf ("SPD data revision %d.%d\n",
849 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
850 printf ("Bytes used 0x%02X\n", data
[0]);
851 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
853 puts ("Memory type ");
873 puts ("Row address bits ");
874 if ((data
[3] & 0x00F0) == 0)
875 printf ("%d\n", data
[3] & 0x0F);
877 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
879 puts ("Column address bits ");
880 if ((data
[4] & 0x00F0) == 0)
881 printf ("%d\n", data
[4] & 0x0F);
883 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
887 printf ("Number of ranks %d\n",
888 (data
[5] & 0x07) + 1);
891 printf ("Module rows %d\n", data
[5]);
897 printf ("Module data width %d bits\n", data
[6]);
900 printf ("Module data width %d bits\n",
901 (data
[7] << 8) | data
[6]);
905 puts ("Interface signal levels ");
907 case 0: puts ("TTL 5.0 V\n"); break;
908 case 1: puts ("LVTTL\n"); break;
909 case 2: puts ("HSTL 1.5 V\n"); break;
910 case 3: puts ("SSTL 3.3 V\n"); break;
911 case 4: puts ("SSTL 2.5 V\n"); break;
912 case 5: puts ("SSTL 1.8 V\n"); break;
913 default: puts ("unknown\n"); break;
918 printf ("SDRAM cycle time ");
919 print_ddr2_tcyc (data
[9]);
922 printf ("SDRAM cycle time %d.%d ns\n",
923 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
929 printf ("SDRAM access time 0.%d%d ns\n",
930 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
933 printf ("SDRAM access time %d.%d ns\n",
934 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
938 puts ("EDC configuration ");
940 case 0: puts ("None\n"); break;
941 case 1: puts ("Parity\n"); break;
942 case 2: puts ("ECC\n"); break;
943 default: puts ("unknown\n"); break;
946 if ((data
[12] & 0x80) == 0)
947 puts ("No self refresh, rate ");
949 puts ("Self refresh, rate ");
951 switch(data
[12] & 0x7F) {
952 case 0: puts ("15.625 us\n"); break;
953 case 1: puts ("3.9 us\n"); break;
954 case 2: puts ("7.8 us\n"); break;
955 case 3: puts ("31.3 us\n"); break;
956 case 4: puts ("62.5 us\n"); break;
957 case 5: puts ("125 us\n"); break;
958 default: puts ("unknown\n"); break;
963 printf ("SDRAM width (primary) %d\n", data
[13]);
966 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
967 if ((data
[13] & 0x80) != 0) {
968 printf (" (second bank) %d\n",
969 2 * (data
[13] & 0x7F));
977 printf ("EDC width %d\n", data
[14]);
981 printf ("EDC width %d\n",
984 if ((data
[14] & 0x80) != 0) {
985 printf (" (second bank) %d\n",
986 2 * (data
[14] & 0x7F));
993 printf ("Min clock delay, back-to-back random column addresses "
997 puts ("Burst length(s) ");
998 if (data
[16] & 0x80) puts (" Page");
999 if (data
[16] & 0x08) puts (" 8");
1000 if (data
[16] & 0x04) puts (" 4");
1001 if (data
[16] & 0x02) puts (" 2");
1002 if (data
[16] & 0x01) puts (" 1");
1004 printf ("Number of banks %d\n", data
[17]);
1008 puts ("CAS latency(s) ");
1009 decode_bits (data
[18], decode_CAS_DDR2
, 0);
1013 puts ("CAS latency(s) ");
1014 decode_bits (data
[18], decode_CAS_default
, 0);
1020 puts ("CS latency(s) ");
1021 decode_bits (data
[19], decode_CS_WE_default
, 0);
1026 puts ("WE latency(s) ");
1027 decode_bits (data
[20], decode_CS_WE_default
, 0);
1033 puts ("Module attributes:\n");
1034 if (data
[21] & 0x80)
1035 puts (" TBD (bit 7)\n");
1036 if (data
[21] & 0x40)
1037 puts (" Analysis probe installed\n");
1038 if (data
[21] & 0x20)
1039 puts (" TBD (bit 5)\n");
1040 if (data
[21] & 0x10)
1041 puts (" FET switch external enable\n");
1042 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
1043 if (data
[20] & 0x11) {
1044 printf (" %d active registers on DIMM\n",
1045 (data
[21] & 0x03) + 1);
1049 puts ("Module attributes:\n");
1053 decode_bits (data
[21], decode_byte21_default
, 0);
1059 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1062 puts ("Device attributes:\n");
1063 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1064 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1065 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1066 else puts (" Upper Vcc tolerance 10%\n");
1067 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1068 else puts (" Lower Vcc tolerance 10%\n");
1069 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1070 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1071 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1072 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1078 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1079 print_ddr2_tcyc (data
[23]);
1082 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1083 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1089 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1090 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1093 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1094 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1100 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1101 print_ddr2_tcyc (data
[25]);
1104 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1105 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1111 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1112 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1115 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1116 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1122 printf ("Minimum row precharge %d.%02d ns\n",
1123 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1126 printf ("Minimum row precharge %d ns\n", data
[27]);
1132 printf ("Row active to row active min %d.%02d ns\n",
1133 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1136 printf ("Row active to row active min %d ns\n", data
[28]);
1142 printf ("RAS to CAS delay min %d.%02d ns\n",
1143 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1146 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1150 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1154 puts ("Density of each row ");
1155 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1159 puts ("Density of each row ");
1160 decode_bits (data
[31], decode_row_density_default
, 1);
1167 puts ("Command and Address setup ");
1168 if (data
[32] >= 0xA0) {
1169 printf ("1.%d%d ns\n",
1170 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1172 printf ("0.%d%d ns\n",
1173 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1177 printf ("Command and Address setup %c%d.%d ns\n",
1178 (data
[32] & 0x80) ? '-' : '+',
1179 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1185 puts ("Command and Address hold ");
1186 if (data
[33] >= 0xA0) {
1187 printf ("1.%d%d ns\n",
1188 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1190 printf ("0.%d%d ns\n",
1191 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1195 printf ("Command and Address hold %c%d.%d ns\n",
1196 (data
[33] & 0x80) ? '-' : '+',
1197 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1203 printf ("Data signal input setup 0.%d%d ns\n",
1204 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1207 printf ("Data signal input setup %c%d.%d ns\n",
1208 (data
[34] & 0x80) ? '-' : '+',
1209 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1215 printf ("Data signal input hold 0.%d%d ns\n",
1216 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1219 printf ("Data signal input hold %c%d.%d ns\n",
1220 (data
[35] & 0x80) ? '-' : '+',
1221 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1225 puts ("Manufacturer's JEDEC ID ");
1226 for (j
= 64; j
<= 71; j
++)
1227 printf ("%02X ", data
[j
]);
1229 printf ("Manufacturing Location %02X\n", data
[72]);
1230 puts ("Manufacturer's Part Number ");
1231 for (j
= 73; j
<= 90; j
++)
1232 printf ("%02X ", data
[j
]);
1234 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1235 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1236 puts ("Assembly Serial Number ");
1237 for (j
= 95; j
<= 98; j
++)
1238 printf ("%02X ", data
[j
]);
1242 printf ("Speed rating PC%d\n",
1243 data
[126] == 0x66 ? 66 : data
[126]);
1249 #if defined(CONFIG_I2C_MUX)
1250 static int do_i2c_add_bus(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1255 /* show all busses */
1257 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1259 printf ("Busses reached over muxes:\n");
1260 while (device
!= NULL
) {
1261 printf ("Bus ID: %x\n", device
->busid
);
1262 printf (" reached over Mux(es):\n");
1264 while (mux
!= NULL
) {
1265 printf (" %s@%x ch: %x\n", mux
->name
, mux
->chip
, mux
->channel
);
1268 device
= device
->next
;
1271 (void)i2c_mux_ident_muxstring ((uchar
*)argv
[1]);
1276 #endif /* CONFIG_I2C_MUX */
1278 #if defined(CONFIG_I2C_MULTI_BUS)
1279 static int do_i2c_bus_num(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1284 /* querying current setting */
1285 printf("Current bus is %d\n", i2c_get_bus_num());
1287 bus_idx
= simple_strtoul(argv
[1], NULL
, 10);
1288 printf("Setting bus to %d\n", bus_idx
);
1289 ret
= i2c_set_bus_num(bus_idx
);
1291 printf("Failure changing bus number (%d)\n", ret
);
1295 #endif /* CONFIG_I2C_MULTI_BUS */
1297 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1302 /* querying current speed */
1303 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1305 speed
= simple_strtoul(argv
[1], NULL
, 10);
1306 printf("Setting bus speed to %d Hz\n", speed
);
1307 ret
= i2c_set_bus_speed(speed
);
1309 printf("Failure changing bus speed (%d)\n", ret
);
1314 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1316 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1319 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1321 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1324 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1326 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1330 static cmd_tbl_t cmd_i2c_sub
[] = {
1331 #if defined(CONFIG_I2C_MUX)
1332 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_add_bus
, "", ""),
1333 #endif /* CONFIG_I2C_MUX */
1334 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1335 #if defined(CONFIG_I2C_MULTI_BUS)
1336 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1337 #endif /* CONFIG_I2C_MULTI_BUS */
1338 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1339 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1340 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1341 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1342 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1343 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1344 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1345 U_BOOT_CMD_MKENT(write
, 5, 0, do_i2c_write
, "", ""),
1346 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1347 #if defined(CONFIG_CMD_SDRAM)
1348 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1350 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1353 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1354 void i2c_reloc(void) {
1355 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1359 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1364 return CMD_RET_USAGE
;
1366 /* Strip off leading 'i2c' command argument */
1370 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1373 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1375 return CMD_RET_USAGE
;
1378 /***************************************************/
1383 #if defined(CONFIG_I2C_MUX)
1384 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1385 #endif /* CONFIG_I2C_MUX */
1386 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1387 #if defined(CONFIG_I2C_MULTI_BUS)
1388 "i2c dev [dev] - show or set current I2C bus\n"
1389 #endif /* CONFIG_I2C_MULTI_BUS */
1390 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1391 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1392 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1393 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1394 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1395 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1396 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1397 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1398 "i2c reset - re-init the I2C Controller\n"
1399 #if defined(CONFIG_CMD_SDRAM)
1400 "i2c sdram chip - print SDRAM configuration information\n"
1402 "i2c speed [speed] - show or set I2C bus speed"
1405 #if defined(CONFIG_I2C_MUX)
1406 static int i2c_mux_add_device(I2C_MUX_DEVICE
*dev
)
1408 I2C_MUX_DEVICE
*devtmp
= i2c_mux_devices
;
1410 if (i2c_mux_devices
== NULL
) {
1411 i2c_mux_devices
= dev
;
1414 while (devtmp
->next
!= NULL
)
1415 devtmp
= devtmp
->next
;
1421 I2C_MUX_DEVICE
*i2c_mux_search_device(int id
)
1423 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1425 while (device
!= NULL
) {
1426 if (device
->busid
== id
)
1428 device
= device
->next
;
1433 /* searches in the buf from *pos the next ':'.
1435 * 0 if found (with *pos = where)
1436 * < 0 if an error occured
1437 * > 0 if the end of buf is reached
1439 static int i2c_mux_search_next (int *pos
, uchar
*buf
, int len
)
1441 while ((buf
[*pos
] != ':') && (*pos
< len
)) {
1446 if (buf
[*pos
] != ':')
1451 static int i2c_mux_get_busid (void)
1453 int tmp
= i2c_mux_busid
;
1459 /* Analyses a Muxstring and immediately sends the
1460 commands to the muxes. Runs from flash.
1462 int i2c_mux_ident_muxstring_f (uchar
*buf
)
1467 int len
= strlen((char *)buf
);
1475 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1478 /* search address */
1481 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1485 chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1487 /* search channel */
1490 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1494 if (buf
[pos
] != 0) {
1498 channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1501 if (i2c_write(chip
, 0, 0, &channel
, 1) != 0) {
1502 printf ("Error setting Mux: chip:%x channel: \
1503 %x\n", chip
, channel
);
1515 /* Analyses a Muxstring and if this String is correct
1516 * adds a new I2C Bus.
1518 I2C_MUX_DEVICE
*i2c_mux_ident_muxstring (uchar
*buf
)
1520 I2C_MUX_DEVICE
*device
;
1525 int len
= strlen((char *)buf
);
1528 device
= (I2C_MUX_DEVICE
*)malloc (sizeof(I2C_MUX_DEVICE
));
1530 device
->busid
= i2c_mux_get_busid ();
1531 device
->next
= NULL
;
1533 mux
= (I2C_MUX
*)malloc (sizeof(I2C_MUX
));
1535 /* search name of mux */
1537 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1539 printf ("%s no name.\n", __FUNCTION__
);
1540 mux
->name
= (char *)malloc (pos
- oldpos
+ 1);
1541 memcpy (mux
->name
, &buf
[oldpos
], pos
- oldpos
);
1542 mux
->name
[pos
- oldpos
] = 0;
1543 /* search address */
1546 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1548 printf ("%s no mux address.\n", __FUNCTION__
);
1550 mux
->chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1552 /* search channel */
1555 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1557 printf ("%s no mux channel.\n", __FUNCTION__
);
1559 if (buf
[pos
] != 0) {
1563 mux
->channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1566 if (device
->mux
== NULL
)
1569 I2C_MUX
*muxtmp
= device
->mux
;
1570 while (muxtmp
->next
!= NULL
) {
1571 muxtmp
= muxtmp
->next
;
1580 i2c_mux_add_device (device
);
1587 int i2x_mux_select_mux(int bus
)
1589 I2C_MUX_DEVICE
*dev
;
1592 if ((gd
->flags
& GD_FLG_RELOC
) != GD_FLG_RELOC
) {
1593 /* select Default Mux Bus */
1594 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1595 i2c_mux_ident_muxstring_f ((uchar
*)CONFIG_SYS_I2C_IVM_BUS
);
1599 buf
= (unsigned char *) getenv("EEprom_ivm");
1601 i2c_mux_ident_muxstring_f (buf
);
1606 dev
= i2c_mux_search_device(bus
);
1611 while (mux
!= NULL
) {
1612 /* do deblocking on each level of mux, before mux config */
1614 if (i2c_write(mux
->chip
, 0, 0, &mux
->channel
, 1) != 0) {
1615 printf ("Error setting Mux: chip:%x channel: \
1616 %x\n", mux
->chip
, mux
->channel
);
1621 /* do deblocking on each level of mux and after mux config */
1625 #endif /* CONFIG_I2C_MUX */