3 * Sergey Kubushyn, himself, ksi@koi8.net
5 * Changes for unified multibus/multiadapter I2C support.
8 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
10 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * I2C Functions similar to the standard memory functions.
32 * There are several parameters in many of the commands that bear further
35 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
36 * Each I2C chip on the bus has a unique address. On the I2C data bus,
37 * the address is the upper seven bits and the LSB is the "read/write"
38 * bit. Note that the {i2c_chip} address specified on the command
39 * line is not shifted up: e.g. a typical EEPROM memory chip may have
40 * an I2C address of 0x50, but the data put on the bus will be 0xA0
41 * for write and 0xA1 for read. This "non shifted" address notation
42 * matches at least half of the data sheets :-/.
44 * {addr} is the address (or offset) within the chip. Small memory
45 * chips have 8 bit addresses. Large memory chips have 16 bit
46 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
47 * Many non-memory chips have multiple registers and {addr} is used
48 * as the register index. Some non-memory chips have only one register
49 * and therefore don't need any {addr} parameter.
51 * The default {addr} parameter is one byte (.1) which works well for
52 * memories and registers with 8 bits of address space.
54 * You can specify the length of the {addr} field with the optional .0,
55 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
56 * manipulating a single register device which doesn't use an address
57 * field, use "0.0" for the address and the ".0" length field will
58 * suppress the address in the I2C data stream. This also works for
59 * successive reads using the I2C auto-incrementing memory pointer.
61 * If you are manipulating a large memory with 2-byte addresses, use
62 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
64 * Then there are the unfortunate memory chips that spill the most
65 * significant 1, 2, or 3 bits of address into the chip address byte.
66 * This effectively makes one chip (logically) look like 2, 4, or
67 * 8 chips. This is handled (awkwardly) by #defining
68 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
69 * {addr} field (since .1 is the default, it doesn't actually have to
70 * be specified). Examples: given a memory chip at I2C chip address
71 * 0x50, the following would happen...
72 * i2c md 50 0 10 display 16 bytes starting at 0x000
73 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
74 * i2c md 50 100 10 display 16 bytes starting at 0x100
75 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
76 * i2c md 50 210 10 display 16 bytes starting at 0x210
77 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
78 * This is awfully ugly. It would be nice if someone would think up
79 * a better way of handling this.
81 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
87 #include <environment.h>
90 #include <asm/byteorder.h>
91 #include <linux/compiler.h>
93 DECLARE_GLOBAL_DATA_PTR;
95 /* Display values from last command.
96 * Memory modify remembered values are different from display memory.
98 static uchar i2c_dp_last_chip;
99 static uint i2c_dp_last_addr;
100 static uint i2c_dp_last_alen;
101 static uint i2c_dp_last_length = 0x10;
103 static uchar i2c_mm_last_chip;
104 static uint i2c_mm_last_addr;
105 static uint i2c_mm_last_alen;
107 /* If only one I2C bus is present, the list of devices to ignore when
108 * the probe command is issued is represented by a 1D array of addresses.
109 * When multiple buses are present, the list is an array of bus-address
110 * pairs. The following macros take care of this */
112 #if defined(CONFIG_SYS_I2C_NOPROBES)
113 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
118 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
119 #define GET_BUS_NUM i2c_get_bus_num()
120 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
121 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
122 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
123 #else /* single bus */
124 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
125 #define GET_BUS_NUM 0
126 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
127 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
128 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
129 #endif /* defined(CONFIG_SYS_I2C) */
132 #define DISP_LINE_LEN 16
135 * i2c_init_board() - Board-specific I2C bus init
137 * This function is the default no-op implementation of I2C bus
138 * initialization. This function can be overriden by board-specific
139 * implementation if needed.
142 void i2c_init_board(void)
146 /* TODO: Implement architecture-specific get/set functions */
149 * i2c_get_bus_speed() - Return I2C bus speed
151 * This function is the default implementation of function for retrieveing
152 * the current I2C bus speed in Hz.
154 * A driver implementing runtime switching of I2C bus speed must override
155 * this function to report the speed correctly. Simple or legacy drivers
156 * can use this fallback.
158 * Returns I2C bus speed in Hz.
160 #if !defined(CONFIG_SYS_I2C)
162 * TODO: Implement architecture-specific get/set functions
163 * Should go away, if we switched completely to new multibus support
166 unsigned int i2c_get_bus_speed(void)
168 return CONFIG_SYS_I2C_SPEED;
172 * i2c_set_bus_speed() - Configure I2C bus speed
173 * @speed: Newly set speed of the I2C bus in Hz
175 * This function is the default implementation of function for setting
176 * the I2C bus speed in Hz.
178 * A driver implementing runtime switching of I2C bus speed must override
179 * this function to report the speed correctly. Simple or legacy drivers
180 * can use this fallback.
182 * Returns zero on success, negative value on error.
185 int i2c_set_bus_speed(unsigned int speed)
187 if (speed != CONFIG_SYS_I2C_SPEED)
195 * get_alen() - Small parser helper function to get address length
197 * Returns the address length.
199 static uint get_alen(char *arg)
205 for (j = 0; j < 8; j++) {
207 alen = arg[j+1] - '0';
209 } else if (arg[j] == '\0')
216 * do_i2c_read() - Handle the "i2c read" command-line command
217 * @cmdtp: Command data struct pointer
218 * @flag: Command flag
219 * @argc: Command-line argument count
220 * @argv: Array of command-line arguments
222 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
226 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
228 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
231 uint devaddr, alen, length;
235 return CMD_RET_USAGE;
240 chip = simple_strtoul(argv[1], NULL, 16);
243 * I2C data address within the chip. This can be 1 or
244 * 2 bytes long. Some day it might be 3 bytes long :-).
246 devaddr = simple_strtoul(argv[2], NULL, 16);
247 alen = get_alen(argv[2]);
249 return CMD_RET_USAGE;
252 * Length is the number of objects, not number of bytes.
254 length = simple_strtoul(argv[3], NULL, 16);
257 * memaddr is the address where to store things in memory
259 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
261 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
262 puts ("Error reading the chip.\n");
268 static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
271 uint devaddr, alen, length;
275 return cmd_usage(cmdtp);
278 * memaddr is the address where to store things in memory
280 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
285 chip = simple_strtoul(argv[2], NULL, 16);
288 * I2C data address within the chip. This can be 1 or
289 * 2 bytes long. Some day it might be 3 bytes long :-).
291 devaddr = simple_strtoul(argv[3], NULL, 16);
292 alen = get_alen(argv[3]);
294 return cmd_usage(cmdtp);
297 * Length is the number of objects, not number of bytes.
299 length = simple_strtoul(argv[4], NULL, 16);
301 while (length-- > 0) {
302 if (i2c_write(chip, devaddr++, alen, memaddr++, 1) != 0) {
303 puts("Error writing to the chip.\n");
307 * No write delay with FRAM devices.
309 #if !defined(CONFIG_SYS_I2C_FRAM)
317 * do_i2c_md() - Handle the "i2c md" command-line command
318 * @cmdtp: Command data struct pointer
319 * @flag: Command flag
320 * @argc: Command-line argument count
321 * @argv: Array of command-line arguments
323 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
327 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
329 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
332 uint addr, alen, length;
333 int j, nbytes, linebytes;
335 /* We use the last specified parameters, unless new ones are
338 chip = i2c_dp_last_chip;
339 addr = i2c_dp_last_addr;
340 alen = i2c_dp_last_alen;
341 length = i2c_dp_last_length;
344 return CMD_RET_USAGE;
346 if ((flag & CMD_FLAG_REPEAT) == 0) {
348 * New command specified.
354 chip = simple_strtoul(argv[1], NULL, 16);
357 * I2C data address within the chip. This can be 1 or
358 * 2 bytes long. Some day it might be 3 bytes long :-).
360 addr = simple_strtoul(argv[2], NULL, 16);
361 alen = get_alen(argv[2]);
363 return CMD_RET_USAGE;
366 * If another parameter, it is the length to display.
367 * Length is the number of objects, not number of bytes.
370 length = simple_strtoul(argv[3], NULL, 16);
376 * We buffer all read data, so we can make sure data is read only
381 unsigned char linebuf[DISP_LINE_LEN];
384 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
386 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
387 puts ("Error reading the chip.\n");
389 printf("%04x:", addr);
391 for (j=0; j<linebytes; j++) {
392 printf(" %02x", *cp++);
397 for (j=0; j<linebytes; j++) {
398 if ((*cp < 0x20) || (*cp > 0x7e))
407 } while (nbytes > 0);
409 i2c_dp_last_chip = chip;
410 i2c_dp_last_addr = addr;
411 i2c_dp_last_alen = alen;
412 i2c_dp_last_length = length;
418 * do_i2c_mw() - Handle the "i2c mw" command-line command
419 * @cmdtp: Command data struct pointer
420 * @flag: Command flag
421 * @argc: Command-line argument count
422 * @argv: Array of command-line arguments
424 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
428 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
430 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
438 if ((argc < 4) || (argc > 5))
439 return CMD_RET_USAGE;
442 * Chip is always specified.
444 chip = simple_strtoul(argv[1], NULL, 16);
447 * Address is always specified.
449 addr = simple_strtoul(argv[2], NULL, 16);
450 alen = get_alen(argv[2]);
452 return CMD_RET_USAGE;
455 * Value to write is always specified.
457 byte = simple_strtoul(argv[3], NULL, 16);
463 count = simple_strtoul(argv[4], NULL, 16);
467 while (count-- > 0) {
468 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
469 puts ("Error writing the chip.\n");
471 * Wait for the write to complete. The write can take
472 * up to 10mSec (we allow a little more time).
475 * No write delay with FRAM devices.
477 #if !defined(CONFIG_SYS_I2C_FRAM)
486 * do_i2c_crc() - Handle the "i2c crc32" command-line command
487 * @cmdtp: Command data struct pointer
488 * @flag: Command flag
489 * @argc: Command-line argument count
490 * @argv: Array of command-line arguments
492 * Calculate a CRC on memory
494 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
498 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
500 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
511 return CMD_RET_USAGE;
514 * Chip is always specified.
516 chip = simple_strtoul(argv[1], NULL, 16);
519 * Address is always specified.
521 addr = simple_strtoul(argv[2], NULL, 16);
522 alen = get_alen(argv[2]);
524 return CMD_RET_USAGE;
527 * Count is always specified
529 count = simple_strtoul(argv[3], NULL, 16);
531 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
533 * CRC a byte at a time. This is going to be slooow, but hey, the
534 * memories are small and slow too so hopefully nobody notices.
538 while (count-- > 0) {
539 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
541 crc = crc32 (crc, &byte, 1);
545 puts ("Error reading the chip,\n");
547 printf ("%08lx\n", crc);
553 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
554 * @cmdtp: Command data struct pointer
555 * @flag: Command flag
556 * @argc: Command-line argument count
557 * @argv: Array of command-line arguments
561 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
565 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
566 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
569 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
579 return CMD_RET_USAGE;
581 #ifdef CONFIG_BOOT_RETRY_TIME
582 reset_cmd_timeout(); /* got a good command to get here */
585 * We use the last specified parameters, unless new ones are
588 chip = i2c_mm_last_chip;
589 addr = i2c_mm_last_addr;
590 alen = i2c_mm_last_alen;
592 if ((flag & CMD_FLAG_REPEAT) == 0) {
594 * New command specified. Check for a size specification.
595 * Defaults to byte if no or incorrect specification.
597 size = cmd_get_data_size(argv[0], 1);
600 * Chip is always specified.
602 chip = simple_strtoul(argv[1], NULL, 16);
605 * Address is always specified.
607 addr = simple_strtoul(argv[2], NULL, 16);
608 alen = get_alen(argv[2]);
610 return CMD_RET_USAGE;
614 * Print the address, followed by value. Then accept input for
615 * the next value. A non-converted value exits.
618 printf("%08lx:", addr);
619 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
620 puts ("\nError reading the chip,\n");
622 data = cpu_to_be32(data);
624 printf(" %02lx", (data >> 24) & 0x000000FF);
626 printf(" %04lx", (data >> 16) & 0x0000FFFF);
628 printf(" %08lx", data);
631 nbytes = readline (" ? ");
634 * <CR> pressed as only input, don't modify current
635 * location and move to next.
640 #ifdef CONFIG_BOOT_RETRY_TIME
641 reset_cmd_timeout(); /* good enough to not time out */
644 #ifdef CONFIG_BOOT_RETRY_TIME
645 else if (nbytes == -2)
646 break; /* timed out, exit the command */
651 data = simple_strtoul(console_buffer, &endp, 16);
656 data = be32_to_cpu(data);
657 nbytes = endp - console_buffer;
659 #ifdef CONFIG_BOOT_RETRY_TIME
661 * good enough to not time out
665 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
666 puts ("Error writing the chip.\n");
667 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
668 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
676 i2c_mm_last_chip = chip;
677 i2c_mm_last_addr = addr;
678 i2c_mm_last_alen = alen;
684 * do_i2c_probe() - Handle the "i2c probe" command-line command
685 * @cmdtp: Command data struct pointer
686 * @flag: Command flag
687 * @argc: Command-line argument count
688 * @argv: Array of command-line arguments
690 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
696 * Returns zero (success) if one or more I2C devices was found
698 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
703 #if defined(CONFIG_SYS_I2C_NOPROBES)
705 unsigned int bus = GET_BUS_NUM;
706 #endif /* NOPROBES */
709 addr = simple_strtol(argv[1], 0, 16);
711 puts ("Valid chip addresses:");
712 for (j = 0; j < 128; j++) {
713 if ((0 <= addr) && (j != addr))
716 #if defined(CONFIG_SYS_I2C_NOPROBES)
718 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
719 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
727 if (i2c_probe(j) == 0) {
734 #if defined(CONFIG_SYS_I2C_NOPROBES)
735 puts ("Excluded chip addresses:");
736 for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
737 if (COMPARE_BUS(bus,k))
738 printf(" %02X", NO_PROBE_ADDR(k));
747 * do_i2c_loop() - Handle the "i2c loop" command-line command
748 * @cmdtp: Command data struct pointer
749 * @flag: Command flag
750 * @argc: Command-line argument count
751 * @argv: Array of command-line arguments
753 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
757 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
758 * {length} - Number of bytes to read
759 * {delay} - A DECIMAL number and defaults to 1000 uSec
761 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
771 return CMD_RET_USAGE;
774 * Chip is always specified.
776 chip = simple_strtoul(argv[1], NULL, 16);
779 * Address is always specified.
781 addr = simple_strtoul(argv[2], NULL, 16);
782 alen = get_alen(argv[2]);
784 return CMD_RET_USAGE;
787 * Length is the number of objects, not number of bytes.
790 length = simple_strtoul(argv[3], NULL, 16);
791 if (length > sizeof(bytes))
792 length = sizeof(bytes);
795 * The delay time (uSec) is optional.
799 delay = simple_strtoul(argv[4], NULL, 10);
804 if (i2c_read(chip, addr, alen, bytes, length) != 0)
805 puts ("Error reading the chip.\n");
814 * The SDRAM command is separately configured because many
815 * (most?) embedded boards don't use SDRAM DIMMs.
817 * FIXME: Document and probably move elsewhere!
819 #if defined(CONFIG_CMD_SDRAM)
820 static void print_ddr2_tcyc (u_char const b)
822 printf ("%d.", (b >> 4) & 0x0F);
834 printf ("%d ns\n", b & 0x0F);
854 static void decode_bits (u_char const b, char const *str[], int const do_once)
858 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
869 * i2c sdram {i2c_chip}
871 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
873 enum { unknown, EDO, SDRAM, DDR2 } type;
880 static const char *decode_CAS_DDR2[] = {
881 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
884 static const char *decode_CAS_default[] = {
885 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
888 static const char *decode_CS_WE_default[] = {
889 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
892 static const char *decode_byte21_default[] = {
894 " Redundant row address\n",
895 " Differential clock input\n",
896 " Registerd DQMB inputs\n",
897 " Buffered DQMB inputs\n",
899 " Registered address/control lines\n",
900 " Buffered address/control lines\n"
903 static const char *decode_byte22_DDR2[] = {
909 " Supports partial array self refresh\n",
910 " Supports 50 ohm ODT\n",
911 " Supports weak driver\n"
914 static const char *decode_row_density_DDR2[] = {
915 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
916 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
919 static const char *decode_row_density_default[] = {
920 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
921 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
925 return CMD_RET_USAGE;
928 * Chip is always specified.
930 chip = simple_strtoul (argv[1], NULL, 16);
932 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
933 puts ("No SDRAM Serial Presence Detect found.\n");
938 for (j = 0; j < 63; j++) {
941 if (cksum != data[63]) {
942 printf ("WARNING: Configuration data checksum failure:\n"
943 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
945 printf ("SPD data revision %d.%d\n",
946 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
947 printf ("Bytes used 0x%02X\n", data[0]);
948 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
950 puts ("Memory type ");
970 puts ("Row address bits ");
971 if ((data[3] & 0x00F0) == 0)
972 printf ("%d\n", data[3] & 0x0F);
974 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
976 puts ("Column address bits ");
977 if ((data[4] & 0x00F0) == 0)
978 printf ("%d\n", data[4] & 0x0F);
980 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
984 printf ("Number of ranks %d\n",
985 (data[5] & 0x07) + 1);
988 printf ("Module rows %d\n", data[5]);
994 printf ("Module data width %d bits\n", data[6]);
997 printf ("Module data width %d bits\n",
998 (data[7] << 8) | data[6]);
1002 puts ("Interface signal levels ");
1004 case 0: puts ("TTL 5.0 V\n"); break;
1005 case 1: puts ("LVTTL\n"); break;
1006 case 2: puts ("HSTL 1.5 V\n"); break;
1007 case 3: puts ("SSTL 3.3 V\n"); break;
1008 case 4: puts ("SSTL 2.5 V\n"); break;
1009 case 5: puts ("SSTL 1.8 V\n"); break;
1010 default: puts ("unknown\n"); break;
1015 printf ("SDRAM cycle time ");
1016 print_ddr2_tcyc (data[9]);
1019 printf ("SDRAM cycle time %d.%d ns\n",
1020 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1026 printf ("SDRAM access time 0.%d%d ns\n",
1027 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1030 printf ("SDRAM access time %d.%d ns\n",
1031 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1035 puts ("EDC configuration ");
1037 case 0: puts ("None\n"); break;
1038 case 1: puts ("Parity\n"); break;
1039 case 2: puts ("ECC\n"); break;
1040 default: puts ("unknown\n"); break;
1043 if ((data[12] & 0x80) == 0)
1044 puts ("No self refresh, rate ");
1046 puts ("Self refresh, rate ");
1048 switch(data[12] & 0x7F) {
1049 case 0: puts ("15.625 us\n"); break;
1050 case 1: puts ("3.9 us\n"); break;
1051 case 2: puts ("7.8 us\n"); break;
1052 case 3: puts ("31.3 us\n"); break;
1053 case 4: puts ("62.5 us\n"); break;
1054 case 5: puts ("125 us\n"); break;
1055 default: puts ("unknown\n"); break;
1060 printf ("SDRAM width (primary) %d\n", data[13]);
1063 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1064 if ((data[13] & 0x80) != 0) {
1065 printf (" (second bank) %d\n",
1066 2 * (data[13] & 0x7F));
1074 printf ("EDC width %d\n", data[14]);
1077 if (data[14] != 0) {
1078 printf ("EDC width %d\n",
1081 if ((data[14] & 0x80) != 0) {
1082 printf (" (second bank) %d\n",
1083 2 * (data[14] & 0x7F));
1090 printf ("Min clock delay, back-to-back random column addresses "
1094 puts ("Burst length(s) ");
1095 if (data[16] & 0x80) puts (" Page");
1096 if (data[16] & 0x08) puts (" 8");
1097 if (data[16] & 0x04) puts (" 4");
1098 if (data[16] & 0x02) puts (" 2");
1099 if (data[16] & 0x01) puts (" 1");
1101 printf ("Number of banks %d\n", data[17]);
1105 puts ("CAS latency(s) ");
1106 decode_bits (data[18], decode_CAS_DDR2, 0);
1110 puts ("CAS latency(s) ");
1111 decode_bits (data[18], decode_CAS_default, 0);
1117 puts ("CS latency(s) ");
1118 decode_bits (data[19], decode_CS_WE_default, 0);
1123 puts ("WE latency(s) ");
1124 decode_bits (data[20], decode_CS_WE_default, 0);
1130 puts ("Module attributes:\n");
1131 if (data[21] & 0x80)
1132 puts (" TBD (bit 7)\n");
1133 if (data[21] & 0x40)
1134 puts (" Analysis probe installed\n");
1135 if (data[21] & 0x20)
1136 puts (" TBD (bit 5)\n");
1137 if (data[21] & 0x10)
1138 puts (" FET switch external enable\n");
1139 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1140 if (data[20] & 0x11) {
1141 printf (" %d active registers on DIMM\n",
1142 (data[21] & 0x03) + 1);
1146 puts ("Module attributes:\n");
1150 decode_bits (data[21], decode_byte21_default, 0);
1156 decode_bits (data[22], decode_byte22_DDR2, 0);
1159 puts ("Device attributes:\n");
1160 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1161 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1162 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1163 else puts (" Upper Vcc tolerance 10%\n");
1164 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1165 else puts (" Lower Vcc tolerance 10%\n");
1166 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1167 if (data[22] & 0x04) puts (" Supports precharge all\n");
1168 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1169 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1175 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1176 print_ddr2_tcyc (data[23]);
1179 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1180 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1186 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1187 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1190 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1191 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1197 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1198 print_ddr2_tcyc (data[25]);
1201 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1202 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1208 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1209 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1212 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1213 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1219 printf ("Minimum row precharge %d.%02d ns\n",
1220 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1223 printf ("Minimum row precharge %d ns\n", data[27]);
1229 printf ("Row active to row active min %d.%02d ns\n",
1230 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1233 printf ("Row active to row active min %d ns\n", data[28]);
1239 printf ("RAS to CAS delay min %d.%02d ns\n",
1240 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1243 printf ("RAS to CAS delay min %d ns\n", data[29]);
1247 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1251 puts ("Density of each row ");
1252 decode_bits (data[31], decode_row_density_DDR2, 1);
1256 puts ("Density of each row ");
1257 decode_bits (data[31], decode_row_density_default, 1);
1264 puts ("Command and Address setup ");
1265 if (data[32] >= 0xA0) {
1266 printf ("1.%d%d ns\n",
1267 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1269 printf ("0.%d%d ns\n",
1270 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1274 printf ("Command and Address setup %c%d.%d ns\n",
1275 (data[32] & 0x80) ? '-' : '+',
1276 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1282 puts ("Command and Address hold ");
1283 if (data[33] >= 0xA0) {
1284 printf ("1.%d%d ns\n",
1285 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1287 printf ("0.%d%d ns\n",
1288 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1292 printf ("Command and Address hold %c%d.%d ns\n",
1293 (data[33] & 0x80) ? '-' : '+',
1294 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1300 printf ("Data signal input setup 0.%d%d ns\n",
1301 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1304 printf ("Data signal input setup %c%d.%d ns\n",
1305 (data[34] & 0x80) ? '-' : '+',
1306 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1312 printf ("Data signal input hold 0.%d%d ns\n",
1313 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1316 printf ("Data signal input hold %c%d.%d ns\n",
1317 (data[35] & 0x80) ? '-' : '+',
1318 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1322 puts ("Manufacturer's JEDEC ID ");
1323 for (j = 64; j <= 71; j++)
1324 printf ("%02X ", data[j]);
1326 printf ("Manufacturing Location %02X\n", data[72]);
1327 puts ("Manufacturer's Part Number ");
1328 for (j = 73; j <= 90; j++)
1329 printf ("%02X ", data[j]);
1331 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1332 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1333 puts ("Assembly Serial Number ");
1334 for (j = 95; j <= 98; j++)
1335 printf ("%02X ", data[j]);
1339 printf ("Speed rating PC%d\n",
1340 data[126] == 0x66 ? 66 : data[126]);
1348 * i2c edid {i2c_chip}
1350 #if defined(CONFIG_I2C_EDID)
1351 int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
1354 struct edid1_info edid;
1361 chip = simple_strtoul(argv[1], NULL, 16);
1362 if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) {
1363 puts("Error reading EDID content.\n");
1367 if (edid_check_info(&edid)) {
1368 puts("Content isn't valid EDID.\n");
1372 edid_print_info(&edid);
1376 #endif /* CONFIG_I2C_EDID */
1379 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1380 * @cmdtp: Command data struct pointer
1381 * @flag: Command flag
1382 * @argc: Command-line argument count
1383 * @argv: Array of command-line arguments
1385 * Returns zero always.
1387 #if defined(CONFIG_SYS_I2C)
1388 int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1391 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1396 /* show all busses */
1397 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1398 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1399 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1400 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1401 if (i2c_bus[i].next_hop[j].chip == 0)
1403 printf("->%s@0x%2x:%d",
1404 i2c_bus[i].next_hop[j].mux.name,
1405 i2c_bus[i].next_hop[j].chip,
1406 i2c_bus[i].next_hop[j].channel);
1412 /* show specific bus */
1413 i = simple_strtoul(argv[1], NULL, 10);
1414 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1415 printf("Invalid bus %d\n", i);
1418 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1419 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1420 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1421 if (i2c_bus[i].next_hop[j].chip == 0)
1423 printf("->%s@0x%2x:%d",
1424 i2c_bus[i].next_hop[j].mux.name,
1425 i2c_bus[i].next_hop[j].chip,
1426 i2c_bus[i].next_hop[j].channel);
1437 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1438 * @cmdtp: Command data struct pointer
1439 * @flag: Command flag
1440 * @argc: Command-line argument count
1441 * @argv: Array of command-line arguments
1443 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1446 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
1447 int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1450 unsigned int bus_no;
1453 /* querying current setting */
1454 printf("Current bus is %d\n", i2c_get_bus_num());
1456 bus_no = simple_strtoul(argv[1], NULL, 10);
1457 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1458 printf("Invalid bus %d\n", bus_no);
1461 printf("Setting bus to %d\n", bus_no);
1462 ret = i2c_set_bus_num(bus_no);
1464 printf("Failure changing bus number (%d)\n", ret);
1468 #endif /* defined(CONFIG_SYS_I2C) */
1471 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1472 * @cmdtp: Command data struct pointer
1473 * @flag: Command flag
1474 * @argc: Command-line argument count
1475 * @argv: Array of command-line arguments
1477 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1480 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1485 /* querying current speed */
1486 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1488 speed = simple_strtoul(argv[1], NULL, 10);
1489 printf("Setting bus speed to %d Hz\n", speed);
1490 ret = i2c_set_bus_speed(speed);
1492 printf("Failure changing bus speed (%d)\n", ret);
1498 * do_i2c_mm() - Handle the "i2c mm" command-line command
1499 * @cmdtp: Command data struct pointer
1500 * @flag: Command flag
1501 * @argc: Command-line argument count
1502 * @argv: Array of command-line arguments
1504 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1507 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1509 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1513 * do_i2c_nm() - Handle the "i2c nm" command-line command
1514 * @cmdtp: Command data struct pointer
1515 * @flag: Command flag
1516 * @argc: Command-line argument count
1517 * @argv: Array of command-line arguments
1519 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1522 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1524 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1528 * do_i2c_reset() - Handle the "i2c reset" command-line command
1529 * @cmdtp: Command data struct pointer
1530 * @flag: Command flag
1531 * @argc: Command-line argument count
1532 * @argv: Array of command-line arguments
1534 * Returns zero always.
1536 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1538 #if defined(CONFIG_SYS_I2C)
1539 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1541 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1546 static cmd_tbl_t cmd_i2c_sub[] = {
1547 #if defined(CONFIG_SYS_I2C)
1548 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1550 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1551 #if defined(CONFIG_SYS_I2C) || \
1552 defined(CONFIG_I2C_MULTI_BUS)
1553 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1554 #endif /* CONFIG_I2C_MULTI_BUS */
1555 #if defined(CONFIG_I2C_EDID)
1556 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1557 #endif /* CONFIG_I2C_EDID */
1558 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1559 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1560 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1561 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1562 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1563 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1564 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1565 U_BOOT_CMD_MKENT(write, 5, 0, do_i2c_write, "", ""),
1566 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1567 #if defined(CONFIG_CMD_SDRAM)
1568 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1570 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1573 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1574 void i2c_reloc(void) {
1575 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1580 * do_i2c() - Handle the "i2c" command-line command
1581 * @cmdtp: Command data struct pointer
1582 * @flag: Command flag
1583 * @argc: Command-line argument count
1584 * @argv: Array of command-line arguments
1586 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1589 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1594 return CMD_RET_USAGE;
1596 /* Strip off leading 'i2c' command argument */
1600 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1603 return c->cmd(cmdtp, flag, argc, argv);
1605 return CMD_RET_USAGE;
1608 /***************************************************/
1609 #ifdef CONFIG_SYS_LONGHELP
1610 static char i2c_help_text[] =
1611 #if defined(CONFIG_SYS_I2C)
1612 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1614 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1615 #if defined(CONFIG_SYS_I2C) || \
1616 defined(CONFIG_I2C_MULTI_BUS)
1617 "i2c dev [dev] - show or set current I2C bus\n"
1618 #endif /* CONFIG_I2C_MULTI_BUS */
1619 #if defined(CONFIG_I2C_EDID)
1620 "i2c edid chip - print EDID configuration information\n"
1621 #endif /* CONFIG_I2C_EDID */
1622 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1623 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1624 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1625 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1626 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1627 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1628 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1629 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1630 "i2c reset - re-init the I2C Controller\n"
1631 #if defined(CONFIG_CMD_SDRAM)
1632 "i2c sdram chip - print SDRAM configuration information\n"
1634 "i2c speed [speed] - show or set I2C bus speed";