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
[])
452 extern char console_buffer
[];
455 return cmd_usage(cmdtp
);
457 #ifdef CONFIG_BOOT_RETRY_TIME
458 reset_cmd_timeout(); /* got a good command to get here */
461 * We use the last specified parameters, unless new ones are
464 chip
= i2c_mm_last_chip
;
465 addr
= i2c_mm_last_addr
;
466 alen
= i2c_mm_last_alen
;
468 if ((flag
& CMD_FLAG_REPEAT
) == 0) {
470 * New command specified. Check for a size specification.
471 * Defaults to byte if no or incorrect specification.
473 size
= cmd_get_data_size(argv
[0], 1);
476 * Chip is always specified.
478 chip
= simple_strtoul(argv
[1], NULL
, 16);
481 * Address is always specified.
483 addr
= simple_strtoul(argv
[2], NULL
, 16);
484 alen
= get_alen(argv
[2]);
486 return cmd_usage(cmdtp
);
490 * Print the address, followed by value. Then accept input for
491 * the next value. A non-converted value exits.
494 printf("%08lx:", addr
);
495 if (i2c_read(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
496 puts ("\nError reading the chip,\n");
498 data
= cpu_to_be32(data
);
500 printf(" %02lx", (data
>> 24) & 0x000000FF);
502 printf(" %04lx", (data
>> 16) & 0x0000FFFF);
504 printf(" %08lx", data
);
507 nbytes
= readline (" ? ");
510 * <CR> pressed as only input, don't modify current
511 * location and move to next.
516 #ifdef CONFIG_BOOT_RETRY_TIME
517 reset_cmd_timeout(); /* good enough to not time out */
520 #ifdef CONFIG_BOOT_RETRY_TIME
521 else if (nbytes
== -2)
522 break; /* timed out, exit the command */
527 data
= simple_strtoul(console_buffer
, &endp
, 16);
532 data
= be32_to_cpu(data
);
533 nbytes
= endp
- console_buffer
;
535 #ifdef CONFIG_BOOT_RETRY_TIME
537 * good enough to not time out
541 if (i2c_write(chip
, addr
, alen
, (uchar
*)&data
, size
) != 0)
542 puts ("Error writing the chip.\n");
543 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
544 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
* 1000);
552 i2c_mm_last_chip
= chip
;
553 i2c_mm_last_addr
= addr
;
554 i2c_mm_last_alen
= alen
;
561 * i2c probe {addr}{.0, .1, .2}
563 static int do_i2c_probe (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
566 #if defined(CONFIG_SYS_I2C_NOPROBES)
568 uchar bus
= GET_BUS_NUM
;
569 #endif /* NOPROBES */
571 puts ("Valid chip addresses:");
572 for (j
= 0; j
< 128; j
++) {
573 #if defined(CONFIG_SYS_I2C_NOPROBES)
575 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
576 if (COMPARE_BUS(bus
, k
) && COMPARE_ADDR(j
, k
)) {
584 if (i2c_probe(j
) == 0)
589 #if defined(CONFIG_SYS_I2C_NOPROBES)
590 puts ("Excluded chip addresses:");
591 for (k
=0; k
< NUM_ELEMENTS_NOPROBE
; k
++) {
592 if (COMPARE_BUS(bus
,k
))
593 printf(" %02X", NO_PROBE_ADDR(k
));
603 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
604 * {length} - Number of bytes to read
605 * {delay} - A DECIMAL number and defaults to 1000 uSec
607 static int do_i2c_loop(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
617 return cmd_usage(cmdtp
);
620 * Chip is always specified.
622 chip
= simple_strtoul(argv
[1], NULL
, 16);
625 * Address is always specified.
627 addr
= simple_strtoul(argv
[2], NULL
, 16);
628 alen
= get_alen(argv
[2]);
630 return cmd_usage(cmdtp
);
633 * Length is the number of objects, not number of bytes.
636 length
= simple_strtoul(argv
[3], NULL
, 16);
637 if (length
> sizeof(bytes
))
638 length
= sizeof(bytes
);
641 * The delay time (uSec) is optional.
645 delay
= simple_strtoul(argv
[4], NULL
, 10);
650 if (i2c_read(chip
, addr
, alen
, bytes
, length
) != 0)
651 puts ("Error reading the chip.\n");
660 * The SDRAM command is separately configured because many
661 * (most?) embedded boards don't use SDRAM DIMMs.
663 #if defined(CONFIG_CMD_SDRAM)
664 static void print_ddr2_tcyc (u_char
const b
)
666 printf ("%d.", (b
>> 4) & 0x0F);
678 printf ("%d ns\n", b
& 0x0F);
698 static void decode_bits (u_char
const b
, char const *str
[], int const do_once
)
702 for (mask
= 0x80; mask
!= 0x00; mask
>>= 1, ++str
) {
713 * i2c sdram {i2c_chip}
715 static int do_sdram (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
717 enum { unknown
, EDO
, SDRAM
, DDR2
} type
;
724 static const char *decode_CAS_DDR2
[] = {
725 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
728 static const char *decode_CAS_default
[] = {
729 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
732 static const char *decode_CS_WE_default
[] = {
733 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
736 static const char *decode_byte21_default
[] = {
738 " Redundant row address\n",
739 " Differential clock input\n",
740 " Registerd DQMB inputs\n",
741 " Buffered DQMB inputs\n",
743 " Registered address/control lines\n",
744 " Buffered address/control lines\n"
747 static const char *decode_byte22_DDR2
[] = {
753 " Supports partial array self refresh\n",
754 " Supports 50 ohm ODT\n",
755 " Supports weak driver\n"
758 static const char *decode_row_density_DDR2
[] = {
759 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
760 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
763 static const char *decode_row_density_default
[] = {
764 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
765 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
769 return cmd_usage(cmdtp
);
772 * Chip is always specified.
774 chip
= simple_strtoul (argv
[1], NULL
, 16);
776 if (i2c_read (chip
, 0, 1, data
, sizeof (data
)) != 0) {
777 puts ("No SDRAM Serial Presence Detect found.\n");
782 for (j
= 0; j
< 63; j
++) {
785 if (cksum
!= data
[63]) {
786 printf ("WARNING: Configuration data checksum failure:\n"
787 " is 0x%02x, calculated 0x%02x\n", data
[63], cksum
);
789 printf ("SPD data revision %d.%d\n",
790 (data
[62] >> 4) & 0x0F, data
[62] & 0x0F);
791 printf ("Bytes used 0x%02X\n", data
[0]);
792 printf ("Serial memory size 0x%02X\n", 1 << data
[1]);
794 puts ("Memory type ");
814 puts ("Row address bits ");
815 if ((data
[3] & 0x00F0) == 0)
816 printf ("%d\n", data
[3] & 0x0F);
818 printf ("%d/%d\n", data
[3] & 0x0F, (data
[3] >> 4) & 0x0F);
820 puts ("Column address bits ");
821 if ((data
[4] & 0x00F0) == 0)
822 printf ("%d\n", data
[4] & 0x0F);
824 printf ("%d/%d\n", data
[4] & 0x0F, (data
[4] >> 4) & 0x0F);
828 printf ("Number of ranks %d\n",
829 (data
[5] & 0x07) + 1);
832 printf ("Module rows %d\n", data
[5]);
838 printf ("Module data width %d bits\n", data
[6]);
841 printf ("Module data width %d bits\n",
842 (data
[7] << 8) | data
[6]);
846 puts ("Interface signal levels ");
848 case 0: puts ("TTL 5.0 V\n"); break;
849 case 1: puts ("LVTTL\n"); break;
850 case 2: puts ("HSTL 1.5 V\n"); break;
851 case 3: puts ("SSTL 3.3 V\n"); break;
852 case 4: puts ("SSTL 2.5 V\n"); break;
853 case 5: puts ("SSTL 1.8 V\n"); break;
854 default: puts ("unknown\n"); break;
859 printf ("SDRAM cycle time ");
860 print_ddr2_tcyc (data
[9]);
863 printf ("SDRAM cycle time %d.%d ns\n",
864 (data
[9] >> 4) & 0x0F, data
[9] & 0x0F);
870 printf ("SDRAM access time 0.%d%d ns\n",
871 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
874 printf ("SDRAM access time %d.%d ns\n",
875 (data
[10] >> 4) & 0x0F, data
[10] & 0x0F);
879 puts ("EDC configuration ");
881 case 0: puts ("None\n"); break;
882 case 1: puts ("Parity\n"); break;
883 case 2: puts ("ECC\n"); break;
884 default: puts ("unknown\n"); break;
887 if ((data
[12] & 0x80) == 0)
888 puts ("No self refresh, rate ");
890 puts ("Self refresh, rate ");
892 switch(data
[12] & 0x7F) {
893 case 0: puts ("15.625 us\n"); break;
894 case 1: puts ("3.9 us\n"); break;
895 case 2: puts ("7.8 us\n"); break;
896 case 3: puts ("31.3 us\n"); break;
897 case 4: puts ("62.5 us\n"); break;
898 case 5: puts ("125 us\n"); break;
899 default: puts ("unknown\n"); break;
904 printf ("SDRAM width (primary) %d\n", data
[13]);
907 printf ("SDRAM width (primary) %d\n", data
[13] & 0x7F);
908 if ((data
[13] & 0x80) != 0) {
909 printf (" (second bank) %d\n",
910 2 * (data
[13] & 0x7F));
918 printf ("EDC width %d\n", data
[14]);
922 printf ("EDC width %d\n",
925 if ((data
[14] & 0x80) != 0) {
926 printf (" (second bank) %d\n",
927 2 * (data
[14] & 0x7F));
934 printf ("Min clock delay, back-to-back random column addresses "
938 puts ("Burst length(s) ");
939 if (data
[16] & 0x80) puts (" Page");
940 if (data
[16] & 0x08) puts (" 8");
941 if (data
[16] & 0x04) puts (" 4");
942 if (data
[16] & 0x02) puts (" 2");
943 if (data
[16] & 0x01) puts (" 1");
945 printf ("Number of banks %d\n", data
[17]);
949 puts ("CAS latency(s) ");
950 decode_bits (data
[18], decode_CAS_DDR2
, 0);
954 puts ("CAS latency(s) ");
955 decode_bits (data
[18], decode_CAS_default
, 0);
961 puts ("CS latency(s) ");
962 decode_bits (data
[19], decode_CS_WE_default
, 0);
967 puts ("WE latency(s) ");
968 decode_bits (data
[20], decode_CS_WE_default
, 0);
974 puts ("Module attributes:\n");
976 puts (" TBD (bit 7)\n");
978 puts (" Analysis probe installed\n");
980 puts (" TBD (bit 5)\n");
982 puts (" FET switch external enable\n");
983 printf (" %d PLLs on DIMM\n", (data
[21] >> 2) & 0x03);
984 if (data
[20] & 0x11) {
985 printf (" %d active registers on DIMM\n",
986 (data
[21] & 0x03) + 1);
990 puts ("Module attributes:\n");
994 decode_bits (data
[21], decode_byte21_default
, 0);
1000 decode_bits (data
[22], decode_byte22_DDR2
, 0);
1003 puts ("Device attributes:\n");
1004 if (data
[22] & 0x80) puts (" TBD (bit 7)\n");
1005 if (data
[22] & 0x40) puts (" TBD (bit 6)\n");
1006 if (data
[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1007 else puts (" Upper Vcc tolerance 10%\n");
1008 if (data
[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1009 else puts (" Lower Vcc tolerance 10%\n");
1010 if (data
[22] & 0x08) puts (" Supports write1/read burst\n");
1011 if (data
[22] & 0x04) puts (" Supports precharge all\n");
1012 if (data
[22] & 0x02) puts (" Supports auto precharge\n");
1013 if (data
[22] & 0x01) puts (" Supports early RAS# precharge\n");
1019 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1020 print_ddr2_tcyc (data
[23]);
1023 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1024 "%d ns\n", (data
[23] >> 4) & 0x0F, data
[23] & 0x0F);
1030 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1031 "%d%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1034 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1035 "%d ns\n", (data
[24] >> 4) & 0x0F, data
[24] & 0x0F);
1041 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1042 print_ddr2_tcyc (data
[25]);
1045 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1046 "%d ns\n", (data
[25] >> 4) & 0x0F, data
[25] & 0x0F);
1052 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1053 "%d%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1056 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1057 "%d ns\n", (data
[26] >> 4) & 0x0F, data
[26] & 0x0F);
1063 printf ("Minimum row precharge %d.%02d ns\n",
1064 (data
[27] >> 2) & 0x3F, 25 * (data
[27] & 0x03));
1067 printf ("Minimum row precharge %d ns\n", data
[27]);
1073 printf ("Row active to row active min %d.%02d ns\n",
1074 (data
[28] >> 2) & 0x3F, 25 * (data
[28] & 0x03));
1077 printf ("Row active to row active min %d ns\n", data
[28]);
1083 printf ("RAS to CAS delay min %d.%02d ns\n",
1084 (data
[29] >> 2) & 0x3F, 25 * (data
[29] & 0x03));
1087 printf ("RAS to CAS delay min %d ns\n", data
[29]);
1091 printf ("Minimum RAS pulse width %d ns\n", data
[30]);
1095 puts ("Density of each row ");
1096 decode_bits (data
[31], decode_row_density_DDR2
, 1);
1100 puts ("Density of each row ");
1101 decode_bits (data
[31], decode_row_density_default
, 1);
1108 puts ("Command and Address setup ");
1109 if (data
[32] >= 0xA0) {
1110 printf ("1.%d%d ns\n",
1111 ((data
[32] >> 4) & 0x0F) - 10, data
[32] & 0x0F);
1113 printf ("0.%d%d ns\n",
1114 ((data
[32] >> 4) & 0x0F), data
[32] & 0x0F);
1118 printf ("Command and Address setup %c%d.%d ns\n",
1119 (data
[32] & 0x80) ? '-' : '+',
1120 (data
[32] >> 4) & 0x07, data
[32] & 0x0F);
1126 puts ("Command and Address hold ");
1127 if (data
[33] >= 0xA0) {
1128 printf ("1.%d%d ns\n",
1129 ((data
[33] >> 4) & 0x0F) - 10, data
[33] & 0x0F);
1131 printf ("0.%d%d ns\n",
1132 ((data
[33] >> 4) & 0x0F), data
[33] & 0x0F);
1136 printf ("Command and Address hold %c%d.%d ns\n",
1137 (data
[33] & 0x80) ? '-' : '+',
1138 (data
[33] >> 4) & 0x07, data
[33] & 0x0F);
1144 printf ("Data signal input setup 0.%d%d ns\n",
1145 (data
[34] >> 4) & 0x0F, data
[34] & 0x0F);
1148 printf ("Data signal input setup %c%d.%d ns\n",
1149 (data
[34] & 0x80) ? '-' : '+',
1150 (data
[34] >> 4) & 0x07, data
[34] & 0x0F);
1156 printf ("Data signal input hold 0.%d%d ns\n",
1157 (data
[35] >> 4) & 0x0F, data
[35] & 0x0F);
1160 printf ("Data signal input hold %c%d.%d ns\n",
1161 (data
[35] & 0x80) ? '-' : '+',
1162 (data
[35] >> 4) & 0x07, data
[35] & 0x0F);
1166 puts ("Manufacturer's JEDEC ID ");
1167 for (j
= 64; j
<= 71; j
++)
1168 printf ("%02X ", data
[j
]);
1170 printf ("Manufacturing Location %02X\n", data
[72]);
1171 puts ("Manufacturer's Part Number ");
1172 for (j
= 73; j
<= 90; j
++)
1173 printf ("%02X ", data
[j
]);
1175 printf ("Revision Code %02X %02X\n", data
[91], data
[92]);
1176 printf ("Manufacturing Date %02X %02X\n", data
[93], data
[94]);
1177 puts ("Assembly Serial Number ");
1178 for (j
= 95; j
<= 98; j
++)
1179 printf ("%02X ", data
[j
]);
1183 printf ("Speed rating PC%d\n",
1184 data
[126] == 0x66 ? 66 : data
[126]);
1190 #if defined(CONFIG_I2C_MUX)
1191 static int do_i2c_add_bus(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1196 /* show all busses */
1198 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1200 printf ("Busses reached over muxes:\n");
1201 while (device
!= NULL
) {
1202 printf ("Bus ID: %x\n", device
->busid
);
1203 printf (" reached over Mux(es):\n");
1205 while (mux
!= NULL
) {
1206 printf (" %s@%x ch: %x\n", mux
->name
, mux
->chip
, mux
->channel
);
1209 device
= device
->next
;
1212 (void)i2c_mux_ident_muxstring ((uchar
*)argv
[1]);
1217 #endif /* CONFIG_I2C_MUX */
1219 #if defined(CONFIG_I2C_MULTI_BUS)
1220 static int do_i2c_bus_num(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1225 /* querying current setting */
1226 printf("Current bus is %d\n", i2c_get_bus_num());
1228 bus_idx
= simple_strtoul(argv
[1], NULL
, 10);
1229 printf("Setting bus to %d\n", bus_idx
);
1230 ret
= i2c_set_bus_num(bus_idx
);
1232 printf("Failure changing bus number (%d)\n", ret
);
1236 #endif /* CONFIG_I2C_MULTI_BUS */
1238 static int do_i2c_bus_speed(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1243 /* querying current speed */
1244 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1246 speed
= simple_strtoul(argv
[1], NULL
, 10);
1247 printf("Setting bus speed to %d Hz\n", speed
);
1248 ret
= i2c_set_bus_speed(speed
);
1250 printf("Failure changing bus speed (%d)\n", ret
);
1255 static int do_i2c_mm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1257 return mod_i2c_mem (cmdtp
, 1, flag
, argc
, argv
);
1260 static int do_i2c_nm(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1262 return mod_i2c_mem (cmdtp
, 0, flag
, argc
, argv
);
1265 static int do_i2c_reset(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1267 i2c_init(CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
1271 static cmd_tbl_t cmd_i2c_sub
[] = {
1272 #if defined(CONFIG_I2C_MUX)
1273 U_BOOT_CMD_MKENT(bus
, 1, 1, do_i2c_add_bus
, "", ""),
1274 #endif /* CONFIG_I2C_MUX */
1275 U_BOOT_CMD_MKENT(crc32
, 3, 1, do_i2c_crc
, "", ""),
1276 #if defined(CONFIG_I2C_MULTI_BUS)
1277 U_BOOT_CMD_MKENT(dev
, 1, 1, do_i2c_bus_num
, "", ""),
1278 #endif /* CONFIG_I2C_MULTI_BUS */
1279 U_BOOT_CMD_MKENT(loop
, 3, 1, do_i2c_loop
, "", ""),
1280 U_BOOT_CMD_MKENT(md
, 3, 1, do_i2c_md
, "", ""),
1281 U_BOOT_CMD_MKENT(mm
, 2, 1, do_i2c_mm
, "", ""),
1282 U_BOOT_CMD_MKENT(mw
, 3, 1, do_i2c_mw
, "", ""),
1283 U_BOOT_CMD_MKENT(nm
, 2, 1, do_i2c_nm
, "", ""),
1284 U_BOOT_CMD_MKENT(probe
, 0, 1, do_i2c_probe
, "", ""),
1285 U_BOOT_CMD_MKENT(read
, 5, 1, do_i2c_read
, "", ""),
1286 U_BOOT_CMD_MKENT(reset
, 0, 1, do_i2c_reset
, "", ""),
1287 #if defined(CONFIG_CMD_SDRAM)
1288 U_BOOT_CMD_MKENT(sdram
, 1, 1, do_sdram
, "", ""),
1290 U_BOOT_CMD_MKENT(speed
, 1, 1, do_i2c_bus_speed
, "", ""),
1293 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1294 void i2c_reloc(void) {
1295 fixup_cmdtable(cmd_i2c_sub
, ARRAY_SIZE(cmd_i2c_sub
));
1299 static int do_i2c(cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1304 return cmd_usage(cmdtp
);
1306 /* Strip off leading 'i2c' command argument */
1310 c
= find_cmd_tbl(argv
[0], &cmd_i2c_sub
[0], ARRAY_SIZE(cmd_i2c_sub
));
1313 return c
->cmd(cmdtp
, flag
, argc
, argv
);
1315 return cmd_usage(cmdtp
);
1318 /***************************************************/
1323 #if defined(CONFIG_I2C_MUX)
1324 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1325 #endif /* CONFIG_I2C_MUX */
1326 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1327 #if defined(CONFIG_I2C_MULTI_BUS)
1328 "i2c dev [dev] - show or set current I2C bus\n"
1329 #endif /* CONFIG_I2C_MULTI_BUS */
1330 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1331 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1332 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1333 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1334 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1335 "i2c probe - show devices on the I2C bus\n"
1336 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1337 "i2c reset - re-init the I2C Controller\n"
1338 #if defined(CONFIG_CMD_SDRAM)
1339 "i2c sdram chip - print SDRAM configuration information\n"
1341 "i2c speed [speed] - show or set I2C bus speed"
1344 #if defined(CONFIG_I2C_MUX)
1345 static int i2c_mux_add_device(I2C_MUX_DEVICE
*dev
)
1347 I2C_MUX_DEVICE
*devtmp
= i2c_mux_devices
;
1349 if (i2c_mux_devices
== NULL
) {
1350 i2c_mux_devices
= dev
;
1353 while (devtmp
->next
!= NULL
)
1354 devtmp
= devtmp
->next
;
1360 I2C_MUX_DEVICE
*i2c_mux_search_device(int id
)
1362 I2C_MUX_DEVICE
*device
= i2c_mux_devices
;
1364 while (device
!= NULL
) {
1365 if (device
->busid
== id
)
1367 device
= device
->next
;
1372 /* searches in the buf from *pos the next ':'.
1374 * 0 if found (with *pos = where)
1375 * < 0 if an error occured
1376 * > 0 if the end of buf is reached
1378 static int i2c_mux_search_next (int *pos
, uchar
*buf
, int len
)
1380 while ((buf
[*pos
] != ':') && (*pos
< len
)) {
1385 if (buf
[*pos
] != ':')
1390 static int i2c_mux_get_busid (void)
1392 int tmp
= i2c_mux_busid
;
1398 /* Analyses a Muxstring and immediately sends the
1399 commands to the muxes. Runs from flash.
1401 int i2c_mux_ident_muxstring_f (uchar
*buf
)
1406 int len
= strlen((char *)buf
);
1414 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1417 /* search address */
1420 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1424 chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1426 /* search channel */
1429 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1433 if (buf
[pos
] != 0) {
1437 channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1440 if (i2c_write(chip
, 0, 0, &channel
, 1) != 0) {
1441 printf ("Error setting Mux: chip:%x channel: \
1442 %x\n", chip
, channel
);
1453 /* Analyses a Muxstring and if this String is correct
1454 * adds a new I2C Bus.
1456 I2C_MUX_DEVICE
*i2c_mux_ident_muxstring (uchar
*buf
)
1458 I2C_MUX_DEVICE
*device
;
1463 int len
= strlen((char *)buf
);
1466 device
= (I2C_MUX_DEVICE
*)malloc (sizeof(I2C_MUX_DEVICE
));
1468 device
->busid
= i2c_mux_get_busid ();
1469 device
->next
= NULL
;
1471 mux
= (I2C_MUX
*)malloc (sizeof(I2C_MUX
));
1473 /* search name of mux */
1475 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1477 printf ("%s no name.\n", __FUNCTION__
);
1478 mux
->name
= (char *)malloc (pos
- oldpos
+ 1);
1479 memcpy (mux
->name
, &buf
[oldpos
], pos
- oldpos
);
1480 mux
->name
[pos
- oldpos
] = 0;
1481 /* search address */
1484 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1486 printf ("%s no mux address.\n", __FUNCTION__
);
1488 mux
->chip
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1490 /* search channel */
1493 ret
= i2c_mux_search_next(&pos
, buf
, len
);
1495 printf ("%s no mux channel.\n", __FUNCTION__
);
1497 if (buf
[pos
] != 0) {
1501 mux
->channel
= simple_strtoul((char *)&buf
[oldpos
], NULL
, 16);
1504 if (device
->mux
== NULL
)
1507 I2C_MUX
*muxtmp
= device
->mux
;
1508 while (muxtmp
->next
!= NULL
) {
1509 muxtmp
= muxtmp
->next
;
1518 i2c_mux_add_device (device
);
1525 int i2x_mux_select_mux(int bus
)
1527 I2C_MUX_DEVICE
*dev
;
1530 if ((gd
->flags
& GD_FLG_RELOC
) != GD_FLG_RELOC
) {
1531 /* select Default Mux Bus */
1532 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1533 i2c_mux_ident_muxstring_f ((uchar
*)CONFIG_SYS_I2C_IVM_BUS
);
1537 buf
= (unsigned char *) getenv("EEprom_ivm");
1539 i2c_mux_ident_muxstring_f (buf
);
1544 dev
= i2c_mux_search_device(bus
);
1549 while (mux
!= NULL
) {
1550 /* do deblocking on each level of mux, before mux config */
1552 if (i2c_write(mux
->chip
, 0, 0, &mux
->channel
, 1) != 0) {
1553 printf ("Error setting Mux: chip:%x channel: \
1554 %x\n", mux
->chip
, mux
->channel
);
1559 /* do deblocking on each level of mux and after mux config */
1563 #endif /* CONFIG_I2C_MUX */