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 /* TODO: Implement architecture-specific get/set functions */
136 unsigned int __def_i2c_get_bus_speed(void)
138 return CONFIG_SYS_I2C_SPEED;
140 unsigned int i2c_get_bus_speed(void)
141 __attribute__((weak, alias("__def_i2c_get_bus_speed")));
143 int __def_i2c_set_bus_speed(unsigned int speed)
145 if (speed != CONFIG_SYS_I2C_SPEED)
150 int i2c_set_bus_speed(unsigned int)
151 __attribute__((weak, alias("__def_i2c_set_bus_speed")));
154 * get_alen: small parser helper function to get address length
155 * returns the address length,or 0 on error
157 static uint get_alen(char *arg)
163 for (j = 0; j < 8; j++) {
165 alen = arg[j+1] - '0';
170 } else if (arg[j] == '\0')
178 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
181 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
184 uint devaddr, alen, length;
188 return cmd_usage(cmdtp);
193 chip = simple_strtoul(argv[1], NULL, 16);
196 * I2C data address within the chip. This can be 1 or
197 * 2 bytes long. Some day it might be 3 bytes long :-).
199 devaddr = simple_strtoul(argv[2], NULL, 16);
200 alen = get_alen(argv[2]);
202 return cmd_usage(cmdtp);
205 * Length is the number of objects, not number of bytes.
207 length = simple_strtoul(argv[3], NULL, 16);
210 * memaddr is the address where to store things in memory
212 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
214 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
215 puts ("Error reading the chip.\n");
223 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
225 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
228 uint addr, alen, length;
229 int j, nbytes, linebytes;
231 /* We use the last specified parameters, unless new ones are
234 chip = i2c_dp_last_chip;
235 addr = i2c_dp_last_addr;
236 alen = i2c_dp_last_alen;
237 length = i2c_dp_last_length;
240 return cmd_usage(cmdtp);
242 if ((flag & CMD_FLAG_REPEAT) == 0) {
244 * New command specified.
250 chip = simple_strtoul(argv[1], NULL, 16);
253 * I2C data address within the chip. This can be 1 or
254 * 2 bytes long. Some day it might be 3 bytes long :-).
256 addr = simple_strtoul(argv[2], NULL, 16);
257 alen = get_alen(argv[2]);
259 return cmd_usage(cmdtp);
262 * If another parameter, it is the length to display.
263 * Length is the number of objects, not number of bytes.
266 length = simple_strtoul(argv[3], NULL, 16);
272 * We buffer all read data, so we can make sure data is read only
277 unsigned char linebuf[DISP_LINE_LEN];
280 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
282 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
283 puts ("Error reading the chip.\n");
285 printf("%04x:", addr);
287 for (j=0; j<linebytes; j++) {
288 printf(" %02x", *cp++);
293 for (j=0; j<linebytes; j++) {
294 if ((*cp < 0x20) || (*cp > 0x7e))
303 } while (nbytes > 0);
305 i2c_dp_last_chip = chip;
306 i2c_dp_last_addr = addr;
307 i2c_dp_last_alen = alen;
308 i2c_dp_last_length = length;
314 /* Write (fill) memory
317 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
319 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
327 if ((argc < 4) || (argc > 5))
328 return cmd_usage(cmdtp);
331 * Chip is always specified.
333 chip = simple_strtoul(argv[1], NULL, 16);
336 * Address is always specified.
338 addr = simple_strtoul(argv[2], NULL, 16);
339 alen = get_alen(argv[2]);
341 return cmd_usage(cmdtp);
344 * Value to write is always specified.
346 byte = simple_strtoul(argv[3], NULL, 16);
352 count = simple_strtoul(argv[4], NULL, 16);
356 while (count-- > 0) {
357 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
358 puts ("Error writing the chip.\n");
360 * Wait for the write to complete. The write can take
361 * up to 10mSec (we allow a little more time).
364 * No write delay with FRAM devices.
366 #if !defined(CONFIG_SYS_I2C_FRAM)
374 /* Calculate a CRC on memory
377 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
379 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
390 return cmd_usage(cmdtp);
393 * Chip is always specified.
395 chip = simple_strtoul(argv[1], NULL, 16);
398 * Address is always specified.
400 addr = simple_strtoul(argv[2], NULL, 16);
401 alen = get_alen(argv[2]);
403 return cmd_usage(cmdtp);
406 * Count is always specified
408 count = simple_strtoul(argv[3], NULL, 16);
410 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
412 * CRC a byte at a time. This is going to be slooow, but hey, the
413 * memories are small and slow too so hopefully nobody notices.
417 while (count-- > 0) {
418 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
420 crc = crc32 (crc, &byte, 1);
424 puts ("Error reading the chip,\n");
426 printf ("%08lx\n", crc);
434 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
435 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
439 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
447 extern char console_buffer[];
450 return cmd_usage(cmdtp);
452 #ifdef CONFIG_BOOT_RETRY_TIME
453 reset_cmd_timeout(); /* got a good command to get here */
456 * We use the last specified parameters, unless new ones are
459 chip = i2c_mm_last_chip;
460 addr = i2c_mm_last_addr;
461 alen = i2c_mm_last_alen;
463 if ((flag & CMD_FLAG_REPEAT) == 0) {
465 * New command specified. Check for a size specification.
466 * Defaults to byte if no or incorrect specification.
468 size = cmd_get_data_size(argv[0], 1);
471 * Chip is always specified.
473 chip = simple_strtoul(argv[1], NULL, 16);
476 * Address is always specified.
478 addr = simple_strtoul(argv[2], NULL, 16);
479 alen = get_alen(argv[2]);
481 return cmd_usage(cmdtp);
485 * Print the address, followed by value. Then accept input for
486 * the next value. A non-converted value exits.
489 printf("%08lx:", addr);
490 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
491 puts ("\nError reading the chip,\n");
493 data = cpu_to_be32(data);
495 printf(" %02lx", (data >> 24) & 0x000000FF);
497 printf(" %04lx", (data >> 16) & 0x0000FFFF);
499 printf(" %08lx", data);
502 nbytes = readline (" ? ");
505 * <CR> pressed as only input, don't modify current
506 * location and move to next.
511 #ifdef CONFIG_BOOT_RETRY_TIME
512 reset_cmd_timeout(); /* good enough to not time out */
515 #ifdef CONFIG_BOOT_RETRY_TIME
516 else if (nbytes == -2)
517 break; /* timed out, exit the command */
522 data = simple_strtoul(console_buffer, &endp, 16);
527 data = be32_to_cpu(data);
528 nbytes = endp - console_buffer;
530 #ifdef CONFIG_BOOT_RETRY_TIME
532 * good enough to not time out
536 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
537 puts ("Error writing the chip.\n");
538 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
539 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
547 i2c_mm_last_chip = chip;
548 i2c_mm_last_addr = addr;
549 i2c_mm_last_alen = alen;
556 * i2c probe {addr}{.0, .1, .2}
558 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
561 #if defined(CONFIG_SYS_I2C_NOPROBES)
563 uchar bus = GET_BUS_NUM;
564 #endif /* NOPROBES */
566 puts ("Valid chip addresses:");
567 for (j = 0; j < 128; j++) {
568 #if defined(CONFIG_SYS_I2C_NOPROBES)
570 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
571 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
579 if (i2c_probe(j) == 0)
584 #if defined(CONFIG_SYS_I2C_NOPROBES)
585 puts ("Excluded chip addresses:");
586 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
587 if (COMPARE_BUS(bus,k))
588 printf(" %02X", NO_PROBE_ADDR(k));
598 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
599 * {length} - Number of bytes to read
600 * {delay} - A DECIMAL number and defaults to 1000 uSec
602 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
612 return cmd_usage(cmdtp);
615 * Chip is always specified.
617 chip = simple_strtoul(argv[1], NULL, 16);
620 * Address is always specified.
622 addr = simple_strtoul(argv[2], NULL, 16);
623 alen = get_alen(argv[2]);
625 return cmd_usage(cmdtp);
628 * Length is the number of objects, not number of bytes.
631 length = simple_strtoul(argv[3], NULL, 16);
632 if (length > sizeof(bytes))
633 length = sizeof(bytes);
636 * The delay time (uSec) is optional.
640 delay = simple_strtoul(argv[4], NULL, 10);
645 if (i2c_read(chip, addr, alen, bytes, length) != 0)
646 puts ("Error reading the chip.\n");
655 * The SDRAM command is separately configured because many
656 * (most?) embedded boards don't use SDRAM DIMMs.
658 #if defined(CONFIG_CMD_SDRAM)
659 static void print_ddr2_tcyc (u_char const b)
661 printf ("%d.", (b >> 4) & 0x0F);
673 printf ("%d ns\n", b & 0x0F);
693 static void decode_bits (u_char const b, char const *str[], int const do_once)
697 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
708 * i2c sdram {i2c_chip}
710 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
712 enum { unknown, EDO, SDRAM, DDR2 } type;
719 static const char *decode_CAS_DDR2[] = {
720 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
723 static const char *decode_CAS_default[] = {
724 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
727 static const char *decode_CS_WE_default[] = {
728 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
731 static const char *decode_byte21_default[] = {
733 " Redundant row address\n",
734 " Differential clock input\n",
735 " Registerd DQMB inputs\n",
736 " Buffered DQMB inputs\n",
738 " Registered address/control lines\n",
739 " Buffered address/control lines\n"
742 static const char *decode_byte22_DDR2[] = {
748 " Supports partial array self refresh\n",
749 " Supports 50 ohm ODT\n",
750 " Supports weak driver\n"
753 static const char *decode_row_density_DDR2[] = {
754 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
755 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
758 static const char *decode_row_density_default[] = {
759 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
760 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
764 return cmd_usage(cmdtp);
767 * Chip is always specified.
769 chip = simple_strtoul (argv[1], NULL, 16);
771 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
772 puts ("No SDRAM Serial Presence Detect found.\n");
777 for (j = 0; j < 63; j++) {
780 if (cksum != data[63]) {
781 printf ("WARNING: Configuration data checksum failure:\n"
782 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
784 printf ("SPD data revision %d.%d\n",
785 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
786 printf ("Bytes used 0x%02X\n", data[0]);
787 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
789 puts ("Memory type ");
809 puts ("Row address bits ");
810 if ((data[3] & 0x00F0) == 0)
811 printf ("%d\n", data[3] & 0x0F);
813 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
815 puts ("Column address bits ");
816 if ((data[4] & 0x00F0) == 0)
817 printf ("%d\n", data[4] & 0x0F);
819 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
823 printf ("Number of ranks %d\n",
824 (data[5] & 0x07) + 1);
827 printf ("Module rows %d\n", data[5]);
833 printf ("Module data width %d bits\n", data[6]);
836 printf ("Module data width %d bits\n",
837 (data[7] << 8) | data[6]);
841 puts ("Interface signal levels ");
843 case 0: puts ("TTL 5.0 V\n"); break;
844 case 1: puts ("LVTTL\n"); break;
845 case 2: puts ("HSTL 1.5 V\n"); break;
846 case 3: puts ("SSTL 3.3 V\n"); break;
847 case 4: puts ("SSTL 2.5 V\n"); break;
848 case 5: puts ("SSTL 1.8 V\n"); break;
849 default: puts ("unknown\n"); break;
854 printf ("SDRAM cycle time ");
855 print_ddr2_tcyc (data[9]);
858 printf ("SDRAM cycle time %d.%d ns\n",
859 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
865 printf ("SDRAM access time 0.%d%d ns\n",
866 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
869 printf ("SDRAM access time %d.%d ns\n",
870 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
874 puts ("EDC configuration ");
876 case 0: puts ("None\n"); break;
877 case 1: puts ("Parity\n"); break;
878 case 2: puts ("ECC\n"); break;
879 default: puts ("unknown\n"); break;
882 if ((data[12] & 0x80) == 0)
883 puts ("No self refresh, rate ");
885 puts ("Self refresh, rate ");
887 switch(data[12] & 0x7F) {
888 case 0: puts ("15.625 us\n"); break;
889 case 1: puts ("3.9 us\n"); break;
890 case 2: puts ("7.8 us\n"); break;
891 case 3: puts ("31.3 us\n"); break;
892 case 4: puts ("62.5 us\n"); break;
893 case 5: puts ("125 us\n"); break;
894 default: puts ("unknown\n"); break;
899 printf ("SDRAM width (primary) %d\n", data[13]);
902 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
903 if ((data[13] & 0x80) != 0) {
904 printf (" (second bank) %d\n",
905 2 * (data[13] & 0x7F));
913 printf ("EDC width %d\n", data[14]);
917 printf ("EDC width %d\n",
920 if ((data[14] & 0x80) != 0) {
921 printf (" (second bank) %d\n",
922 2 * (data[14] & 0x7F));
929 printf ("Min clock delay, back-to-back random column addresses "
933 puts ("Burst length(s) ");
934 if (data[16] & 0x80) puts (" Page");
935 if (data[16] & 0x08) puts (" 8");
936 if (data[16] & 0x04) puts (" 4");
937 if (data[16] & 0x02) puts (" 2");
938 if (data[16] & 0x01) puts (" 1");
940 printf ("Number of banks %d\n", data[17]);
944 puts ("CAS latency(s) ");
945 decode_bits (data[18], decode_CAS_DDR2, 0);
949 puts ("CAS latency(s) ");
950 decode_bits (data[18], decode_CAS_default, 0);
956 puts ("CS latency(s) ");
957 decode_bits (data[19], decode_CS_WE_default, 0);
962 puts ("WE latency(s) ");
963 decode_bits (data[20], decode_CS_WE_default, 0);
969 puts ("Module attributes:\n");
971 puts (" TBD (bit 7)\n");
973 puts (" Analysis probe installed\n");
975 puts (" TBD (bit 5)\n");
977 puts (" FET switch external enable\n");
978 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
979 if (data[20] & 0x11) {
980 printf (" %d active registers on DIMM\n",
981 (data[21] & 0x03) + 1);
985 puts ("Module attributes:\n");
989 decode_bits (data[21], decode_byte21_default, 0);
995 decode_bits (data[22], decode_byte22_DDR2, 0);
998 puts ("Device attributes:\n");
999 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1000 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1001 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1002 else puts (" Upper Vcc tolerance 10%\n");
1003 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1004 else puts (" Lower Vcc tolerance 10%\n");
1005 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1006 if (data[22] & 0x04) puts (" Supports precharge all\n");
1007 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1008 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1014 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1015 print_ddr2_tcyc (data[23]);
1018 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1019 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1025 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1026 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1029 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1030 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1036 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1037 print_ddr2_tcyc (data[25]);
1040 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1041 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1047 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1048 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1051 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1052 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1058 printf ("Minimum row precharge %d.%02d ns\n",
1059 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1062 printf ("Minimum row precharge %d ns\n", data[27]);
1068 printf ("Row active to row active min %d.%02d ns\n",
1069 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1072 printf ("Row active to row active min %d ns\n", data[28]);
1078 printf ("RAS to CAS delay min %d.%02d ns\n",
1079 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1082 printf ("RAS to CAS delay min %d ns\n", data[29]);
1086 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1090 puts ("Density of each row ");
1091 decode_bits (data[31], decode_row_density_DDR2, 1);
1095 puts ("Density of each row ");
1096 decode_bits (data[31], decode_row_density_default, 1);
1103 puts ("Command and Address setup ");
1104 if (data[32] >= 0xA0) {
1105 printf ("1.%d%d ns\n",
1106 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1108 printf ("0.%d%d ns\n",
1109 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1113 printf ("Command and Address setup %c%d.%d ns\n",
1114 (data[32] & 0x80) ? '-' : '+',
1115 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1121 puts ("Command and Address hold ");
1122 if (data[33] >= 0xA0) {
1123 printf ("1.%d%d ns\n",
1124 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1126 printf ("0.%d%d ns\n",
1127 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1131 printf ("Command and Address hold %c%d.%d ns\n",
1132 (data[33] & 0x80) ? '-' : '+',
1133 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1139 printf ("Data signal input setup 0.%d%d ns\n",
1140 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1143 printf ("Data signal input setup %c%d.%d ns\n",
1144 (data[34] & 0x80) ? '-' : '+',
1145 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1151 printf ("Data signal input hold 0.%d%d ns\n",
1152 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1155 printf ("Data signal input hold %c%d.%d ns\n",
1156 (data[35] & 0x80) ? '-' : '+',
1157 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1161 puts ("Manufacturer's JEDEC ID ");
1162 for (j = 64; j <= 71; j++)
1163 printf ("%02X ", data[j]);
1165 printf ("Manufacturing Location %02X\n", data[72]);
1166 puts ("Manufacturer's Part Number ");
1167 for (j = 73; j <= 90; j++)
1168 printf ("%02X ", data[j]);
1170 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1171 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1172 puts ("Assembly Serial Number ");
1173 for (j = 95; j <= 98; j++)
1174 printf ("%02X ", data[j]);
1178 printf ("Speed rating PC%d\n",
1179 data[126] == 0x66 ? 66 : data[126]);
1185 #if defined(CONFIG_I2C_MUX)
1186 static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1191 /* show all busses */
1193 I2C_MUX_DEVICE *device = i2c_mux_devices;
1195 printf ("Busses reached over muxes:\n");
1196 while (device != NULL) {
1197 printf ("Bus ID: %x\n", device->busid);
1198 printf (" reached over Mux(es):\n");
1200 while (mux != NULL) {
1201 printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel);
1204 device = device->next;
1207 I2C_MUX_DEVICE *dev;
1209 dev = i2c_mux_ident_muxstring ((uchar *)argv[1]);
1214 #endif /* CONFIG_I2C_MUX */
1216 #if defined(CONFIG_I2C_MULTI_BUS)
1217 static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1222 /* querying current setting */
1223 printf("Current bus is %d\n", i2c_get_bus_num());
1225 bus_idx = simple_strtoul(argv[1], NULL, 10);
1226 printf("Setting bus to %d\n", bus_idx);
1227 ret = i2c_set_bus_num(bus_idx);
1229 printf("Failure changing bus number (%d)\n", ret);
1233 #endif /* CONFIG_I2C_MULTI_BUS */
1235 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1240 /* querying current speed */
1241 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1243 speed = simple_strtoul(argv[1], NULL, 10);
1244 printf("Setting bus speed to %d Hz\n", speed);
1245 ret = i2c_set_bus_speed(speed);
1247 printf("Failure changing bus speed (%d)\n", ret);
1252 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1254 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1257 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1259 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1262 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1264 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1268 static cmd_tbl_t cmd_i2c_sub[] = {
1269 #if defined(CONFIG_I2C_MUX)
1270 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
1271 #endif /* CONFIG_I2C_MUX */
1272 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1273 #if defined(CONFIG_I2C_MULTI_BUS)
1274 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1275 #endif /* CONFIG_I2C_MULTI_BUS */
1276 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1277 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1278 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1279 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1280 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1281 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1282 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1283 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1284 #if defined(CONFIG_CMD_SDRAM)
1285 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1287 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1290 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1294 /* Strip off leading 'i2c' command argument */
1298 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1301 return c->cmd(cmdtp, flag, argc, argv);
1303 return cmd_usage(cmdtp);
1306 /***************************************************/
1311 #if defined(CONFIG_I2C_MUX)
1312 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1313 #endif /* CONFIG_I2C_MUX */
1314 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1315 #if defined(CONFIG_I2C_MULTI_BUS)
1316 "i2c dev [dev] - show or set current I2C bus\n"
1317 #endif /* CONFIG_I2C_MULTI_BUS */
1318 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1319 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1320 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1321 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1322 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1323 "i2c probe - show devices on the I2C bus\n"
1324 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1325 "i2c reset - re-init the I2C Controller\n"
1326 #if defined(CONFIG_CMD_SDRAM)
1327 "i2c sdram chip - print SDRAM configuration information\n"
1329 "i2c speed [speed] - show or set I2C bus speed"
1332 #if defined(CONFIG_I2C_MUX)
1333 static int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
1335 I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
1337 if (i2c_mux_devices == NULL) {
1338 i2c_mux_devices = dev;
1341 while (devtmp->next != NULL)
1342 devtmp = devtmp->next;
1348 I2C_MUX_DEVICE *i2c_mux_search_device(int id)
1350 I2C_MUX_DEVICE *device = i2c_mux_devices;
1352 while (device != NULL) {
1353 if (device->busid == id)
1355 device = device->next;
1360 /* searches in the buf from *pos the next ':'.
1362 * 0 if found (with *pos = where)
1363 * < 0 if an error occured
1364 * > 0 if the end of buf is reached
1366 static int i2c_mux_search_next (int *pos, uchar *buf, int len)
1368 while ((buf[*pos] != ':') && (*pos < len)) {
1373 if (buf[*pos] != ':')
1378 static int i2c_mux_get_busid (void)
1380 int tmp = i2c_mux_busid;
1386 /* Analyses a Muxstring and sends immediately the
1387 Commands to the Muxes. Runs from Flash.
1389 int i2c_mux_ident_muxstring_f (uchar *buf)
1394 int len = strlen((char *)buf);
1402 ret = i2c_mux_search_next(&pos, buf, len);
1405 /* search address */
1408 ret = i2c_mux_search_next(&pos, buf, len);
1412 chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1414 /* search channel */
1417 ret = i2c_mux_search_next(&pos, buf, len);
1421 if (buf[pos] != 0) {
1425 channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1428 if (i2c_write(chip, 0, 0, &channel, 1) != 0) {
1429 printf ("Error setting Mux: chip:%x channel: \
1430 %x\n", chip, channel);
1441 /* Analyses a Muxstring and if this String is correct
1442 * adds a new I2C Bus.
1444 I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf)
1446 I2C_MUX_DEVICE *device;
1451 int len = strlen((char *)buf);
1454 device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE));
1456 device->busid = i2c_mux_get_busid ();
1457 device->next = NULL;
1459 mux = (I2C_MUX *)malloc (sizeof(I2C_MUX));
1461 /* search name of mux */
1463 ret = i2c_mux_search_next(&pos, buf, len);
1465 printf ("%s no name.\n", __FUNCTION__);
1466 mux->name = (char *)malloc (pos - oldpos + 1);
1467 memcpy (mux->name, &buf[oldpos], pos - oldpos);
1468 mux->name[pos - oldpos] = 0;
1469 /* search address */
1472 ret = i2c_mux_search_next(&pos, buf, len);
1474 printf ("%s no mux address.\n", __FUNCTION__);
1476 mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1478 /* search channel */
1481 ret = i2c_mux_search_next(&pos, buf, len);
1483 printf ("%s no mux channel.\n", __FUNCTION__);
1485 if (buf[pos] != 0) {
1489 mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1492 if (device->mux == NULL)
1495 I2C_MUX *muxtmp = device->mux;
1496 while (muxtmp->next != NULL) {
1497 muxtmp = muxtmp->next;
1506 i2c_mux_add_device (device);
1513 int i2x_mux_select_mux(int bus)
1515 I2C_MUX_DEVICE *dev;
1518 if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) {
1519 /* select Default Mux Bus */
1520 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1521 i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
1525 buf = (unsigned char *) getenv("EEprom_ivm");
1527 i2c_mux_ident_muxstring_f (buf);
1532 dev = i2c_mux_search_device(bus);
1537 while (mux != NULL) {
1538 if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
1539 printf ("Error setting Mux: chip:%x channel: \
1540 %x\n", mux->chip, mux->channel);
1547 #endif /* CONFIG_I2C_MUX */