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;
608 * i2c probe {addr}{.0, .1, .2}
610 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
613 #if defined(CONFIG_SYS_I2C_NOPROBES)
615 uchar bus = GET_BUS_NUM;
616 #endif /* NOPROBES */
618 puts ("Valid chip addresses:");
619 for (j = 0; j < 128; j++) {
620 #if defined(CONFIG_SYS_I2C_NOPROBES)
622 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
623 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
631 if (i2c_probe(j) == 0)
636 #if defined(CONFIG_SYS_I2C_NOPROBES)
637 puts ("Excluded chip addresses:");
638 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
639 if (COMPARE_BUS(bus,k))
640 printf(" %02X", NO_PROBE_ADDR(k));
650 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
651 * {length} - Number of bytes to read
652 * {delay} - A DECIMAL number and defaults to 1000 uSec
654 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
664 return CMD_RET_USAGE;
667 * Chip is always specified.
669 chip = simple_strtoul(argv[1], NULL, 16);
672 * Address is always specified.
674 addr = simple_strtoul(argv[2], NULL, 16);
675 alen = get_alen(argv[2]);
677 return CMD_RET_USAGE;
680 * Length is the number of objects, not number of bytes.
683 length = simple_strtoul(argv[3], NULL, 16);
684 if (length > sizeof(bytes))
685 length = sizeof(bytes);
688 * The delay time (uSec) is optional.
692 delay = simple_strtoul(argv[4], NULL, 10);
697 if (i2c_read(chip, addr, alen, bytes, length) != 0)
698 puts ("Error reading the chip.\n");
707 * The SDRAM command is separately configured because many
708 * (most?) embedded boards don't use SDRAM DIMMs.
710 #if defined(CONFIG_CMD_SDRAM)
711 static void print_ddr2_tcyc (u_char const b)
713 printf ("%d.", (b >> 4) & 0x0F);
725 printf ("%d ns\n", b & 0x0F);
745 static void decode_bits (u_char const b, char const *str[], int const do_once)
749 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
760 * i2c sdram {i2c_chip}
762 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
764 enum { unknown, EDO, SDRAM, DDR2 } type;
771 static const char *decode_CAS_DDR2[] = {
772 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
775 static const char *decode_CAS_default[] = {
776 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
779 static const char *decode_CS_WE_default[] = {
780 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
783 static const char *decode_byte21_default[] = {
785 " Redundant row address\n",
786 " Differential clock input\n",
787 " Registerd DQMB inputs\n",
788 " Buffered DQMB inputs\n",
790 " Registered address/control lines\n",
791 " Buffered address/control lines\n"
794 static const char *decode_byte22_DDR2[] = {
800 " Supports partial array self refresh\n",
801 " Supports 50 ohm ODT\n",
802 " Supports weak driver\n"
805 static const char *decode_row_density_DDR2[] = {
806 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
807 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
810 static const char *decode_row_density_default[] = {
811 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
812 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
816 return CMD_RET_USAGE;
819 * Chip is always specified.
821 chip = simple_strtoul (argv[1], NULL, 16);
823 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
824 puts ("No SDRAM Serial Presence Detect found.\n");
829 for (j = 0; j < 63; j++) {
832 if (cksum != data[63]) {
833 printf ("WARNING: Configuration data checksum failure:\n"
834 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
836 printf ("SPD data revision %d.%d\n",
837 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
838 printf ("Bytes used 0x%02X\n", data[0]);
839 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
841 puts ("Memory type ");
861 puts ("Row address bits ");
862 if ((data[3] & 0x00F0) == 0)
863 printf ("%d\n", data[3] & 0x0F);
865 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
867 puts ("Column address bits ");
868 if ((data[4] & 0x00F0) == 0)
869 printf ("%d\n", data[4] & 0x0F);
871 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
875 printf ("Number of ranks %d\n",
876 (data[5] & 0x07) + 1);
879 printf ("Module rows %d\n", data[5]);
885 printf ("Module data width %d bits\n", data[6]);
888 printf ("Module data width %d bits\n",
889 (data[7] << 8) | data[6]);
893 puts ("Interface signal levels ");
895 case 0: puts ("TTL 5.0 V\n"); break;
896 case 1: puts ("LVTTL\n"); break;
897 case 2: puts ("HSTL 1.5 V\n"); break;
898 case 3: puts ("SSTL 3.3 V\n"); break;
899 case 4: puts ("SSTL 2.5 V\n"); break;
900 case 5: puts ("SSTL 1.8 V\n"); break;
901 default: puts ("unknown\n"); break;
906 printf ("SDRAM cycle time ");
907 print_ddr2_tcyc (data[9]);
910 printf ("SDRAM cycle time %d.%d ns\n",
911 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
917 printf ("SDRAM access time 0.%d%d ns\n",
918 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
921 printf ("SDRAM access time %d.%d ns\n",
922 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
926 puts ("EDC configuration ");
928 case 0: puts ("None\n"); break;
929 case 1: puts ("Parity\n"); break;
930 case 2: puts ("ECC\n"); break;
931 default: puts ("unknown\n"); break;
934 if ((data[12] & 0x80) == 0)
935 puts ("No self refresh, rate ");
937 puts ("Self refresh, rate ");
939 switch(data[12] & 0x7F) {
940 case 0: puts ("15.625 us\n"); break;
941 case 1: puts ("3.9 us\n"); break;
942 case 2: puts ("7.8 us\n"); break;
943 case 3: puts ("31.3 us\n"); break;
944 case 4: puts ("62.5 us\n"); break;
945 case 5: puts ("125 us\n"); break;
946 default: puts ("unknown\n"); break;
951 printf ("SDRAM width (primary) %d\n", data[13]);
954 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
955 if ((data[13] & 0x80) != 0) {
956 printf (" (second bank) %d\n",
957 2 * (data[13] & 0x7F));
965 printf ("EDC width %d\n", data[14]);
969 printf ("EDC width %d\n",
972 if ((data[14] & 0x80) != 0) {
973 printf (" (second bank) %d\n",
974 2 * (data[14] & 0x7F));
981 printf ("Min clock delay, back-to-back random column addresses "
985 puts ("Burst length(s) ");
986 if (data[16] & 0x80) puts (" Page");
987 if (data[16] & 0x08) puts (" 8");
988 if (data[16] & 0x04) puts (" 4");
989 if (data[16] & 0x02) puts (" 2");
990 if (data[16] & 0x01) puts (" 1");
992 printf ("Number of banks %d\n", data[17]);
996 puts ("CAS latency(s) ");
997 decode_bits (data[18], decode_CAS_DDR2, 0);
1001 puts ("CAS latency(s) ");
1002 decode_bits (data[18], decode_CAS_default, 0);
1008 puts ("CS latency(s) ");
1009 decode_bits (data[19], decode_CS_WE_default, 0);
1014 puts ("WE latency(s) ");
1015 decode_bits (data[20], decode_CS_WE_default, 0);
1021 puts ("Module attributes:\n");
1022 if (data[21] & 0x80)
1023 puts (" TBD (bit 7)\n");
1024 if (data[21] & 0x40)
1025 puts (" Analysis probe installed\n");
1026 if (data[21] & 0x20)
1027 puts (" TBD (bit 5)\n");
1028 if (data[21] & 0x10)
1029 puts (" FET switch external enable\n");
1030 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1031 if (data[20] & 0x11) {
1032 printf (" %d active registers on DIMM\n",
1033 (data[21] & 0x03) + 1);
1037 puts ("Module attributes:\n");
1041 decode_bits (data[21], decode_byte21_default, 0);
1047 decode_bits (data[22], decode_byte22_DDR2, 0);
1050 puts ("Device attributes:\n");
1051 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1052 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1053 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1054 else puts (" Upper Vcc tolerance 10%\n");
1055 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1056 else puts (" Lower Vcc tolerance 10%\n");
1057 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1058 if (data[22] & 0x04) puts (" Supports precharge all\n");
1059 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1060 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1066 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1067 print_ddr2_tcyc (data[23]);
1070 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1071 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1077 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1078 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1081 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1082 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1088 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1089 print_ddr2_tcyc (data[25]);
1092 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1093 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1099 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1100 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1103 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1104 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1110 printf ("Minimum row precharge %d.%02d ns\n",
1111 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1114 printf ("Minimum row precharge %d ns\n", data[27]);
1120 printf ("Row active to row active min %d.%02d ns\n",
1121 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1124 printf ("Row active to row active min %d ns\n", data[28]);
1130 printf ("RAS to CAS delay min %d.%02d ns\n",
1131 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1134 printf ("RAS to CAS delay min %d ns\n", data[29]);
1138 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1142 puts ("Density of each row ");
1143 decode_bits (data[31], decode_row_density_DDR2, 1);
1147 puts ("Density of each row ");
1148 decode_bits (data[31], decode_row_density_default, 1);
1155 puts ("Command and Address setup ");
1156 if (data[32] >= 0xA0) {
1157 printf ("1.%d%d ns\n",
1158 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1160 printf ("0.%d%d ns\n",
1161 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1165 printf ("Command and Address setup %c%d.%d ns\n",
1166 (data[32] & 0x80) ? '-' : '+',
1167 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1173 puts ("Command and Address hold ");
1174 if (data[33] >= 0xA0) {
1175 printf ("1.%d%d ns\n",
1176 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1178 printf ("0.%d%d ns\n",
1179 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1183 printf ("Command and Address hold %c%d.%d ns\n",
1184 (data[33] & 0x80) ? '-' : '+',
1185 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1191 printf ("Data signal input setup 0.%d%d ns\n",
1192 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1195 printf ("Data signal input setup %c%d.%d ns\n",
1196 (data[34] & 0x80) ? '-' : '+',
1197 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1203 printf ("Data signal input hold 0.%d%d ns\n",
1204 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1207 printf ("Data signal input hold %c%d.%d ns\n",
1208 (data[35] & 0x80) ? '-' : '+',
1209 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1213 puts ("Manufacturer's JEDEC ID ");
1214 for (j = 64; j <= 71; j++)
1215 printf ("%02X ", data[j]);
1217 printf ("Manufacturing Location %02X\n", data[72]);
1218 puts ("Manufacturer's Part Number ");
1219 for (j = 73; j <= 90; j++)
1220 printf ("%02X ", data[j]);
1222 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1223 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1224 puts ("Assembly Serial Number ");
1225 for (j = 95; j <= 98; j++)
1226 printf ("%02X ", data[j]);
1230 printf ("Speed rating PC%d\n",
1231 data[126] == 0x66 ? 66 : data[126]);
1237 #if defined(CONFIG_I2C_MUX)
1238 static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1243 /* show all busses */
1245 I2C_MUX_DEVICE *device = i2c_mux_devices;
1247 printf ("Busses reached over muxes:\n");
1248 while (device != NULL) {
1249 printf ("Bus ID: %x\n", device->busid);
1250 printf (" reached over Mux(es):\n");
1252 while (mux != NULL) {
1253 printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel);
1256 device = device->next;
1259 (void)i2c_mux_ident_muxstring ((uchar *)argv[1]);
1264 #endif /* CONFIG_I2C_MUX */
1266 #if defined(CONFIG_I2C_MULTI_BUS)
1267 static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1272 /* querying current setting */
1273 printf("Current bus is %d\n", i2c_get_bus_num());
1275 bus_idx = simple_strtoul(argv[1], NULL, 10);
1276 printf("Setting bus to %d\n", bus_idx);
1277 ret = i2c_set_bus_num(bus_idx);
1279 printf("Failure changing bus number (%d)\n", ret);
1283 #endif /* CONFIG_I2C_MULTI_BUS */
1285 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1290 /* querying current speed */
1291 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1293 speed = simple_strtoul(argv[1], NULL, 10);
1294 printf("Setting bus speed to %d Hz\n", speed);
1295 ret = i2c_set_bus_speed(speed);
1297 printf("Failure changing bus speed (%d)\n", ret);
1302 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1304 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1307 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1309 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1312 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1314 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1318 static cmd_tbl_t cmd_i2c_sub[] = {
1319 #if defined(CONFIG_I2C_MUX)
1320 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
1321 #endif /* CONFIG_I2C_MUX */
1322 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1323 #if defined(CONFIG_I2C_MULTI_BUS)
1324 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1325 #endif /* CONFIG_I2C_MULTI_BUS */
1326 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1327 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1328 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1329 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1330 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1331 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1332 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1333 U_BOOT_CMD_MKENT(write, 5, 0, do_i2c_write, "", ""),
1334 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1335 #if defined(CONFIG_CMD_SDRAM)
1336 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1338 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1341 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1342 void i2c_reloc(void) {
1343 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1347 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1352 return CMD_RET_USAGE;
1354 /* Strip off leading 'i2c' command argument */
1358 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1361 return c->cmd(cmdtp, flag, argc, argv);
1363 return CMD_RET_USAGE;
1366 /***************************************************/
1371 #if defined(CONFIG_I2C_MUX)
1372 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1373 #endif /* CONFIG_I2C_MUX */
1374 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1375 #if defined(CONFIG_I2C_MULTI_BUS)
1376 "i2c dev [dev] - show or set current I2C bus\n"
1377 #endif /* CONFIG_I2C_MULTI_BUS */
1378 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1379 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1380 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1381 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1382 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1383 "i2c probe - show devices on the I2C bus\n"
1384 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1385 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1386 "i2c reset - re-init the I2C Controller\n"
1387 #if defined(CONFIG_CMD_SDRAM)
1388 "i2c sdram chip - print SDRAM configuration information\n"
1390 "i2c speed [speed] - show or set I2C bus speed"
1393 #if defined(CONFIG_I2C_MUX)
1394 static int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
1396 I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
1398 if (i2c_mux_devices == NULL) {
1399 i2c_mux_devices = dev;
1402 while (devtmp->next != NULL)
1403 devtmp = devtmp->next;
1409 I2C_MUX_DEVICE *i2c_mux_search_device(int id)
1411 I2C_MUX_DEVICE *device = i2c_mux_devices;
1413 while (device != NULL) {
1414 if (device->busid == id)
1416 device = device->next;
1421 /* searches in the buf from *pos the next ':'.
1423 * 0 if found (with *pos = where)
1424 * < 0 if an error occured
1425 * > 0 if the end of buf is reached
1427 static int i2c_mux_search_next (int *pos, uchar *buf, int len)
1429 while ((buf[*pos] != ':') && (*pos < len)) {
1434 if (buf[*pos] != ':')
1439 static int i2c_mux_get_busid (void)
1441 int tmp = i2c_mux_busid;
1447 /* Analyses a Muxstring and immediately sends the
1448 commands to the muxes. Runs from flash.
1450 int i2c_mux_ident_muxstring_f (uchar *buf)
1455 int len = strlen((char *)buf);
1463 ret = i2c_mux_search_next(&pos, buf, len);
1466 /* search address */
1469 ret = i2c_mux_search_next(&pos, buf, len);
1473 chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1475 /* search channel */
1478 ret = i2c_mux_search_next(&pos, buf, len);
1482 if (buf[pos] != 0) {
1486 channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1489 if (i2c_write(chip, 0, 0, &channel, 1) != 0) {
1490 printf ("Error setting Mux: chip:%x channel: \
1491 %x\n", chip, channel);
1503 /* Analyses a Muxstring and if this String is correct
1504 * adds a new I2C Bus.
1506 I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf)
1508 I2C_MUX_DEVICE *device;
1513 int len = strlen((char *)buf);
1516 device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE));
1518 device->busid = i2c_mux_get_busid ();
1519 device->next = NULL;
1521 mux = (I2C_MUX *)malloc (sizeof(I2C_MUX));
1523 /* search name of mux */
1525 ret = i2c_mux_search_next(&pos, buf, len);
1527 printf ("%s no name.\n", __FUNCTION__);
1528 mux->name = (char *)malloc (pos - oldpos + 1);
1529 memcpy (mux->name, &buf[oldpos], pos - oldpos);
1530 mux->name[pos - oldpos] = 0;
1531 /* search address */
1534 ret = i2c_mux_search_next(&pos, buf, len);
1536 printf ("%s no mux address.\n", __FUNCTION__);
1538 mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1540 /* search channel */
1543 ret = i2c_mux_search_next(&pos, buf, len);
1545 printf ("%s no mux channel.\n", __FUNCTION__);
1547 if (buf[pos] != 0) {
1551 mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1554 if (device->mux == NULL)
1557 I2C_MUX *muxtmp = device->mux;
1558 while (muxtmp->next != NULL) {
1559 muxtmp = muxtmp->next;
1568 i2c_mux_add_device (device);
1575 int i2x_mux_select_mux(int bus)
1577 I2C_MUX_DEVICE *dev;
1580 if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) {
1581 /* select Default Mux Bus */
1582 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1583 i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
1587 buf = (unsigned char *) getenv("EEprom_ivm");
1589 i2c_mux_ident_muxstring_f (buf);
1594 dev = i2c_mux_search_device(bus);
1599 while (mux != NULL) {
1600 /* do deblocking on each level of mux, before mux config */
1602 if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
1603 printf ("Error setting Mux: chip:%x channel: \
1604 %x\n", mux->chip, mux->channel);
1609 /* do deblocking on each level of mux and after mux config */
1613 #endif /* CONFIG_I2C_MUX */